WO2024199497A1 - Condenser provided with oil separation structure therein - Google Patents

Abstract

The present application provides a condenser provided with an oil separation structure therein. The condenser comprises a casing and an oil separation structure. The casing comprises length, width, and height directions and defines a containing cavity, and is provided with at least one inlet pipe to receive a lubricating oil-containing refrigerant to be condensed. The oil separation structure is fixed in the containing cavity, and comprises a separation chamber used for separating a lubricating oil and a refrigerant gas in the refrigerant. The at least one inlet pipe extends into the separation chamber. The containing cavity comprises a first condensation chamber and a second condensation chamber which are isolated by the oil separation structure and respectively located on two sides of the separation chamber in the width direction of the casing, and the first condensation chamber and the second condensation chamber extend in the length direction of the casing. The upper part of the oil separation structure is provided with a first gas discharge port and a second gas discharge port that 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 at least one oil discharge port is formed in the bottom of the oil separation structure, so that the lubricating oil separated by the separation chamber can be discharged out of the separation chamber.

Description

Condenser with built-in oil separation structure Technical Field

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

Background Art

The refrigeration and air-conditioning system includes a condenser, which is used to condense the high-temperature and high-pressure gas-phase refrigerant discharged from the compressor into a medium-temperature and high-pressure liquid-phase refrigerant. In a screw compressor, lubricating oil is required between the rotors to reduce the noise of the compressor. At the same time, the lubricating oil can reduce gas leakage during the rotor meshing process and improve the performance of the compressor. Therefore, during the actual operation of the screw compressor, the gas discharged from the compressor includes refrigerant oil droplets in addition to the gas-phase refrigerant. If too much lubricating oil enters the condenser and evaporator, it will not only cause the oil supply system to lack oil and increase the oil shortage and damage of the moving parts of the compressor, but also too much lubricating oil will adhere to the heat exchange tube in a thin film state, causing the heat exchange effect of the entire refrigeration and air-conditioning system to fail to reach the designed state. Therefore, it is necessary to set up an oil separation structure to separate the gas-phase refrigerant and oil discharged from the compressor, and the separated oil is returned to the 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 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 with an oil separation structure, the condenser comprising a shell and an oil separation structure. The shell defines a volume cavity, the shell is provided with at least one inlet pipe for receiving a refrigerant to be condensed containing lubricating oil, and the shell comprises a length direction, a height direction and a width direction. The oil separation structure is fixed in the volume cavity, the oil separation structure comprises a separation chamber, the at least one inlet pipe extends into the separation chamber, wherein the separation chamber is configured to separate the lubricating oil and the refrigerant gas in the refrigerant. The volume cavity comprises a first condensation chamber and a second condensation chamber separated by the oil separation structure, the first condensation chamber and the second condensation chamber are respectively located on both sides of the separation chamber in the width direction of the shell, and extend respectively along the length direction of the shell. In which, the upper part of the oil separation structure is provided with a first exhaust port and a second exhaust port which respectively connect the first condensation chamber and the second condensation chamber with the separation chamber fluid, so that the refrigerant gas separated by the separation chamber can enter the first condensation chamber and the second condensation chamber for condensation, and the bottom of the oil separation structure is provided with at least one oil drain port so that the lubricating oil separated by the separation chamber can be discharged from the separation chamber.

In the condenser with a built-in oil separation structure as described above, the separation chamber is arranged in the center of the cavity in the width direction of the shell.

In the condenser with an oil separation structure as described above, the oil separation structure comprises a plurality of vertical separation plates arranged in the separation chamber at intervals along the length direction of the shell, and each of the plurality of vertical separation plates is arranged transversely to the extension direction of the separation chamber. At least a portion of the plurality of vertical separation plates is arranged to block the upper fluid passage in the separation chamber, and at least another portion of the plurality of vertical separation plates is arranged to block the lower fluid passage in the separation chamber.

In the condenser with a built-in oil separation structure as described above, on one side of the first exhaust port and the second exhaust port, at least a portion of the vertical separation plates that blocks the upper fluid passage in the separation chamber and at least another portion of the vertical separation plates that blocks the lower fluid passage in the separation chamber are alternately arranged.

In the condenser with a built-in oil separation structure as described above, the at least one inlet pipe is arranged at the top of the shell in the center in the width direction of the shell.

In the condenser with the oil separation structure as described above, the portion of the at least one inlet pipe extending into the separation chamber extends along the height direction of the shell. The oil separation structure also includes a transverse separation plate located below the at least one inlet pipe.

In the condenser with a built-in oil separation structure as described above, the portion 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 exhaust port and the second exhaust port.

In the condenser with a built-in oil separation structure as described above, the separation chamber extends along the length direction of the shell, and the cross-section of the separation chamber in a plane parallel to the height direction and the width direction of the shell is generally funnel-shaped, so that the separation chamber has a mouth and a handle, and the width dimension of the handle is designed to be slightly larger than the diameter d of the at least one inlet pipe.

In the condenser with an oil separation structure as described above, the oil separation structure includes a shell, and the shell defines the separation chamber. The shell includes opposite side walls, opposite end walls, and opposite top and bottom walls connected to each other. The top wall abuts against the top inner surface of the shell, and the upper parts of the opposite side walls are respectively provided with the first exhaust port and the second exhaust port. At least a portion of the vertical separation plate that blocks the upper fluid passage in the separation chamber extends from the top wall to at least a portion of the height of the separation chamber, and at least another portion of the vertical separation plate that blocks the lower fluid passage in the separation chamber extends from the bottom of the oil separation structure to at least a portion of the height of the separation chamber.

In the condenser with an oil separation structure as described above, the oil separation structure includes a shell, and the shell defines the separation chamber. The shell includes opposite side walls, opposite end walls and a bottom wall connected to each other. The tops of the opposite side walls and the opposite end walls abut against the top inner surface of the shell, and the first exhaust port and the second exhaust port are respectively provided on the upper parts of the opposite side walls.

In the condenser with an oil separation structure as described above, the lower fluid passage in the separation chamber is blocked. The at least another portion of the vertical separation plate is spaced a certain distance from the bottom wall to define an oil guide channel.

In the condenser with an oil separation structure as described above, the bottom wall of the oil separation structure abuts against the bottom inner surface of the shell, and the at least one oil drain port is arranged on the bottom wall. The condenser comprises a first subcooling box and a second subcooling box located at the bottom of the cavity, and the first subcooling box and the second subcooling box are respectively located on both sides of the oil separation structure in the width direction of the shell.

In the condenser with an oil separation structure as described above, the condenser includes a supercooling box arranged at the bottom of the chamber, and the bottom wall of the oil separation structure abuts against the supercooling box. The oil separation structure also includes at least one oil storage cavity arranged at the bottom of the oil separation structure and connected to the bottom of the separation chamber, and the at least one oil drain port is arranged at the bottom of the corresponding at least one oil storage cavity. The at least one oil storage cavity is accommodated at the bottom of one of the first condensing chamber and the second condensing chamber.

According to another aspect of the present application, the present application provides a refrigeration and air-conditioning system, which includes a condenser with a built-in oil separation structure according to the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 a is a cross-sectional view of a condenser according to an embodiment of the present application.

Fig. 1b is a cross-sectional view of the condenser shown in Fig. 1a along the direction A-A.

FIG. 1c shows a housing of the oil separation structure in the condenser shown in FIG. 1b .

FIG. 2 a is a cross-sectional view of a condenser according to another embodiment of the present application.

Fig. 2b is a cross-sectional view of the condenser shown in Fig. 2a along the B-B direction.

FIG. 3 a is a cross-sectional view of a condenser according to yet another embodiment of the present application.

FIG3b is a cross-sectional view of the condenser shown in FIG3a along the C-C direction.

DETAILED DESCRIPTION

Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that, where possible, the same or similar figure numbers used in this application refer to the same parts. Although terms indicating directions, such as "up, down, left, right, top, bottom", etc. are used in this application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in this application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

FIG. 1a to FIG. 1c show a condenser 10a according to an embodiment of the present application. FIG. 1a is a condenser 10a according to an embodiment of the present application. FIG1b is a cross-sectional view of the condenser 10a shown in FIG1a along the AA direction. FIG1c shows the housing 202a of the oil separation structure 201a in the condenser 10a shown in FIG1b.

As shown in Fig. 1a and Fig. 1b, the condenser 10a includes a shell 101, and the shell 101 includes a length direction, a width direction and a height direction as shown in Fig. 1a. The shell 101 defines a cavity 102, and the oil separation structure 201a is fixed in the cavity 102 and extends along the length direction of the shell 101. In Fig. 1a, the oil separation structure 201a extends the length of the cavity 102. The oil separation structure 201a includes a separation chamber 203a.

As shown in FIG. 1b , the chamber 102 includes a first condensation chamber 104a and a second condensation chamber 105a separated by an oil separation structure 201a. The first condensation chamber 104a and the second condensation chamber 105a are respectively located on both sides of the separation chamber 203a in the width direction of the shell 101 and extend the length of the chamber 102 respectively. A plurality of condensation pipes 106 are respectively provided in the first condensation chamber 104a and the second condensation chamber 105a for receiving the cooling fluid. As will be discussed in detail below, the 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 condensation 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 chamber 102 in the width direction of the shell 101. In some embodiments, the separation chamber 203a is non-centrally arranged in the chamber 102 in the width direction of the shell 101.

The chamber 102 is also provided with subcooling boxes 107.1 and 107.2, which are used to further cool the refrigerant cooled by the cooling fluid in the condensing tube 106. The cooled refrigerant is sent to the throttle valve of the refrigeration and air conditioning system. The subcooling boxes 107.1 and 107.2 are located on both sides of the oil separation structure 201a, and are respectively accommodated in the lower part of the first condensing chamber 104a and the second condensing chamber 105a. The structure of this split subcooling box makes the oil separation structure 201a 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 makes it possible to provide a maximum flight height for the refrigerant entering the separation chamber 203a, thereby increasing the flight time of the refrigerant in the separation chamber 203a, so as to improve the gravity separation effect, thereby facilitating the full separation of the lubricating oil. This also allows the separation chamber 203a to be designed to have a smaller width, so that the two condensation chambers (the first condensation chamber 104a and the second condensation chamber 105a) have a larger space to arrange more condensation tubes 106, thereby improving the heat exchange capacity of the condenser 10a.

The shell 101 is provided with two inlet pipes 301a connected to a compressor (not shown in the figure) at positions near the two ends of the shell 101, which are used to receive the refrigerant to be condensed (hereinafter referred to as "refrigerant") containing liquid lubricating oil from the compressor. The inlet pipe 301a extends into the separation chamber 203a, so as to send the refrigerant received from the compressor into the separation chamber 203a, so as to separate the liquid lubricating oil and the refrigerant gas in the refrigerant in the separation chamber 203a. As shown in Figure 1a, the part of the inlet pipe 301a extending into the separation chamber 203a is bent into a curved pipe shape, so that the outlets 303a of the inlet pipe 301a are respectively facing the two ends of the oil separation structure 201a. In some embodiments, as shown in Figure 1b, the two inlet pipes 301a are arranged centered at the top of the shell 101 in the width direction of the shell 101. In some embodiments, the inlet pipe 301a can also be arranged at the top of the shell 101 in the width direction of the shell 101. Non-central arrangement. Although FIG1a shows that the number of inlet tubes is two, it should be understood that in other embodiments, a different number of inlet tubes 301a may be provided. As an example, the number of inlet tubes 301a is one.

The structure of the oil separation structure 201a is described in conjunction with Figures 1a-1c. As shown in Figures 1a-1c, the oil separation structure 201a includes a housing 202a, and the housing 202a defines a separation chamber 203a. The housing 202a includes opposite side walls 204 and 205, opposite end walls 206 and 207, and opposite top walls 208 and bottom walls 209a, and the side walls 204 and 205, the end walls 206 and 207, and the top wall 208 and bottom wall 209a are connected to each other to form the housing 202a.

As shown in Fig. 1a and Fig. 1b, the upper part of the opposite side walls 204 and 205 is provided with a first exhaust port 210.1 and a second exhaust port 210.2 respectively. The first exhaust port 210.1 is communicated with the first condensation chamber 104a, and the second exhaust port 210.2 is communicated with the second condensation chamber 105a, so that the refrigerant gas separated by the separation chamber 203a enters the first condensation chamber 104a and the second condensation chamber 105a through the first exhaust port 210.1 and the second exhaust port 210.2 respectively for condensation. The two inlet pipes 301a are bent away from the first exhaust port 210.1 and the second exhaust port 210.2, so that the outlets 303a of the two inlet pipes 301a are respectively directed to the corresponding one of the end walls 206 and 207 of the oil separation structure 201a. In the embodiment of Fig. 1a-Fig. 1c, the first exhaust port 210.1 and the second exhaust port 210.2 are arranged in the middle of the upper part of the opposite side walls 204 and 205. In some embodiments where only one inlet pipe 301a is provided, the inlet pipe 301a is disposed close to the end wall 206 or 207 toward which its outlet 303a faces, and the first exhaust port 210.1 and the second exhaust port 210.2 are relatively disposed at the upper portions 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 from the first exhaust port 210.1 and the second exhaust port 210.2 as possible, so that the refrigerant has a sufficient flight distance in the separation chamber 203a to achieve separation of the lubricating oil.

FIG1c shows that the bottom wall 209a is provided with an oil drain port 214a. Although not shown in the figure, it should be understood that the corresponding position of the shell 101 of the condenser 10a has an outlet corresponding to the oil drain port 214a, so that the lubricating oil separated by the separation chamber 203a can be discharged through the oil drain port 214a. In different embodiments, the number of the oil drain ports 214a can be different. As an example, the number of the oil drain ports 214a can be one, two or more.

As shown in Fig. 1b and Fig. 1c, the cross section of the separation chamber 203a parallel to the plane formed by the height and width of the shell 101 is generally funnel-shaped, so that the separation chamber 203a has a mouth 221a and a handle 222a. The width dimension W1 of the handle 222a is designed to be slightly larger than the diameter d of the inlet pipe 301a, which is conducive to the refrigerant entering the separation chamber 203a while making the handle 222a have a width as small as possible. The small width of the handle 222a makes the flow speed of the refrigerant in the handle 222a fast, which is conducive to the impact separation and centrifugal separation of the lubricating oil (to be discussed in detail below). The small width of the handle 222a also enables the cavity 102 to provide more space for condensation. As shown in FIG. 1b, since the handle 222a can have a very small width, most of the space of the cavity 102 is occupied by the first condensation chamber 104a and the second condensation chamber 105a. Therefore, many condensation tubes can be arranged in the first condensation chamber 104a and the second condensation chamber 105a to improve the heat exchange capacity of the condenser 10a. The mouth 221a gradually opens upward from the handle 222a, so that the width gradually increases upward from the handle 222a. This allows the refrigerant to flow into the mouth 221a. The flow velocity is reduced, thereby increasing the flight time of the refrigerant in the separation chamber 203a, improving the gravity separation effect, and being conducive to the full separation of the lubricating oil. As shown in Figures 1a and 1b, a filter screen 241 is provided in the mouth 221a below the location of the first exhaust port 210.1 and the second exhaust port 210.2, so as to further separate the lubricating oil in the refrigerant before the refrigerant leaves the separation chamber 203a and enters the first condensing chamber 104a and the second condensing chamber 105a. The design of the mouth 221a gradually opening upward from the handle 222a reduces the flow velocity of the refrigerant when passing through the filter screen 241, so that the filter screen 241 can better capture and separate the lubricating oil in the refrigerant. In some embodiments, the filter screen 241 is not provided in the mouth 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 cavity 102. The structure of the oil separation structure 201a makes the oil separation structure 201a easy to manufacture and can be conveniently fixed in the cavity 102. In some embodiments, the oil separation structure 201a is obtained by bending and/or connecting suitable materials. The manufactured oil separation structure 201a is pushed into the cavity 102 of the condenser 10a and abuts against the bottom and top inner surfaces of the shell 101 of the condenser 10a and is easily fixed in the cavity 102. In some embodiments, the oil separation structure 201a is constructed without a top wall 208. In such embodiments, 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.

The vertical separation plates 211 and 212 are arranged in the separation chamber 203a to block the flow of the refrigerant in the separation chamber 203a, so as to facilitate the separation of the lubricating oil in the refrigerant. The arrangement of the vertical separation plates 211 and 212 is illustrated in conjunction with FIG. 1a and FIG. 1b. The vertical separation plates 211 and 212 are arranged transversely to the extension direction of the separation chamber 203a, and respectively abut against the opposite side walls 204 and 205 of the oil separation structure 201a. The vertical separation plate 211 extends downward from the top wall 208 of the oil separation structure 201a to a portion of the height of the separation chamber 203a, and is used to block the upper fluid passage in the separation chamber 203a. The vertical separation plate 212 extends upward from the bottom of the oil separation structure 201a to a portion of the height of the separation chamber 203a, and blocks the 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 first exhaust port 210.1 and the second exhaust port 210.2 are alternately arranged in the length direction of the shell 101. The distance between the vertical separation plates 211 and 212 in the length direction of the shell 101 and the distance between the vertical separation plate 211 and the end wall 206 or 207 of the oil separation structure 201a are designed so as to obtain the required oil separation effect. In some embodiments, the sum of the heights of the vertical separation plates 211 and the vertical separation plates 212 is less than the height of the separation chamber 203a. In other embodiments, the sum of the heights of the vertical separation plates 211 and the vertical separation plates 212 is equal to the height of the separation chamber 203a. In still other embodiments, the sum of the heights of the vertical separation plates 211 and the vertical separation plates 212 is greater than the height of the separation chamber 203a.

As shown in FIG. 1b, in the embodiment of FIG. 1a-FIG. 1c, a certain distance is spaced between the vertical separation plate 212 and 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 is connected to the oil drain port 214a. The lubricating oil separated in the separation chamber 203a falls into the oil guide channel 219a and flows to the oil drain port 214a, so as to flow out through the oil drain port 214a and return to the compressor. The bottom wall 209a of the oil separation structure 201a may be provided with only one oil drain port 214a. 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. Thus, in these embodiments, a plurality of oil drain ports 214a are provided on the bottom wall 209a of the oil separation structure 201a, 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 FIG. 1a-FIG. 1c, a vertical separation plate 211 and a vertical separation plate 212 are respectively arranged on one side of the location of the first exhaust port 210.1 and the second exhaust port 210.2. The vertical separation plate 211 is close to the inlet pipe 301a and is located on the 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 locations of the first exhaust port 210.1 and the second exhaust port 210.2 in the length direction of the housing 101. In other embodiments, different numbers of vertical separation plates 211 and 212 are arranged in the separation chamber 203a.

The process of separating lubricating oil and refrigerant gas from the refrigerant entering the oil separation chamber 203a from the inlet pipe 301a located on the right side shown in Fig. 1a is described below in conjunction with Fig. 1a. It should be understood that the process of separating lubricating oil and refrigerant gas from the refrigerant entering the separation chamber 203a from the inlet pipe 301a located on the left side in Fig. 1a is similar.

As shown in FIG. 1a , after the refrigerant is discharged from the outlet 303a of the inlet pipe 301a, it flows toward the end wall 207 of the oil separation structure 201a and hits the end wall 207. Through the impact, part of the lubricating oil in the refrigerant is separated, and the separated lubricating oil drips into the oil guide channel 219a at the bottom of the separation chamber 203a, and the remaining refrigerant is turned back after hitting the end wall 207 as the first impact-separated refrigerant, and part of the first impact-separated refrigerant flows toward the vertical separation plate 211, and part of it flows toward the vertical separation plate 212. The part of the first impact-separated refrigerant flowing toward the vertical separation plate 211 hits the vertical separation plate 211, and the impact causes part of the lubricating oil in this part of the first impact-separated refrigerant to be separated and drip into the oil guide channel 219a, and the remaining refrigerant continues to flow toward the first exhaust port 210.1 and the second exhaust port 210.2 as the second impact-separated refrigerant. Since the flow of the refrigerant after the second impact separation is blocked by the vertical separation plate 211, the refrigerant after the second impact separation changes its flow direction to bypass the obstruction of the vertical separation plate 211. The change in movement direction causes the refrigerant after the second impact separation to rotate around the vertical separation plate 211. The centrifugal force generated by the rotation further causes the lubricating oil in the refrigerant after the second impact separation to be centrifugally separated, thereby dripping into the oil guide channel 219a, and the remaining refrigerant continues to flow toward the first exhaust port 210.1 and the second exhaust port 210.2 as the first refrigerant after centrifugal separation, and enters the first condensation chamber 104a and the second condensation chamber 105a through the first exhaust port 210.1 and the second exhaust port 210.2 respectively. Part of the first impact-separated refrigerant flowing toward the vertical separation plate 212 impacts the vertical separation plate 212. This impact causes part of the lubricating oil in this part of the first impact-separated refrigerant to be separated and drip into the oil guide channel 219a. The remaining refrigerant continues to flow toward the first exhaust port 210.1 and the second exhaust port 210.2 as the third impact-separated refrigerant. Since the flow of the third impact-separated refrigerant is blocked by the vertical separation plate 212, the third impact-separated refrigerant changes its flow direction to bypass the obstruction of the vertical separation plate 212. This change in movement direction causes the third impact-separated refrigerant to rotate around the vertical separation plate 212 while flowing. The centrifugal force generated by the rotation further causes the lubricating oil in the refrigerant after the third impact separation to be centrifugally separated, thereby dripping into the oil guide channel 219a, and the remaining refrigerant continues to flow toward the first exhaust port 210.1 and the second exhaust port 210.2 as the refrigerant after the second centrifugal separation, and enters the first condensing chamber 104a and the second condensing chamber 105a through the first exhaust port 210.1 and the second exhaust port 210.2 respectively. In addition, since the separation chamber 203a according to the present application provides a sufficient flight height for the refrigerant, during the 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 lubricating oil in the refrigerant is also separated from the refrigerant gas based on gravity, and the lubricating oil after gravity separation also drops into the oil guide channel 219a. The lubricating oil dripping into the oil guide channel 219a is discharged through the oil discharge port 214a to return to the compressor. In some embodiments, when the vertical separation plates 211 on both sides of the first exhaust port 210.1 and the second exhaust port 210.2 are close to each other, the refrigerant that reaches the bottom of the first exhaust port 210.1 and the second exhaust port 210.2 generates a vortex between the two vertical separation plates 211, and the 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 impact separation, centrifugal separation, and gravity separation. The presence of multiple separation methods enables the present application to provide sufficient oil separation for the refrigerant.

Fig. 2a-Fig. 2b shows 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 the condenser 10b shown in Fig. 2a along the B-B direction.

The condenser 10b of the embodiment shown in Fig. 2a-Fig. 2b is similar to the condenser 10a of the embodiment shown in Fig. 1a-Fig. 1c, except that the oil separation structure is changed and the first condensation chamber and the second condensation chamber are changed, and the vertical separation plate is set differently. For the purpose of making the description concise, only the differences between the condenser 10b and the condenser 10a are described below.

As shown in Fig. 2a and Fig. 2b, an oil separation structure 201b is provided in the cavity of the condenser 10b, and 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, so its opposite side walls and opposite end walls are directly connected to the inner surface of the 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 supercooling box 107 is provided at the bottom of the cavity of the condenser 10b, and the bottom wall 209b of the oil separation structure 201b abuts against the supercooling box 107, so that the height of the separation chamber 203b is less than the height of the separation chamber 203a. The handle of the separation chamber 203b has a width W2. Taking into account the reduced flying height of the refrigerant in the separation chamber 203b and the resulting shortened flying time caused by the height of the separation chamber 203b being smaller than that of the separation chamber 203a, the width W2 of the handle of the separation chamber 203b is designed to be slightly larger than the width W1 of the handle of the separation chamber 203a, which slightly reduces the flying speed of the refrigerant in the separation chamber 203b, thereby increasing the flying time of the refrigerant in the separation chamber 203b and reducing the pressure loss during the flight. The flight time provides a gravity separation effect for the refrigerant in the separation chamber 203b, and the reduced pressure loss is beneficial to the impact separation and centrifugal separation of the refrigerant, thereby facilitating the full separation of the lubricating oil. An oil storage chamber 215 is provided at the bottom of the oil separation structure 201b, and the oil storage chamber 215 is accommodated in the second condensing chamber 105b. The oil storage chamber 215 and the oil guide at the bottom of the oil separation structure 201b are connected to each other. The channel 219b is connected to collect the separated lubricating oil from the separation chamber 203b. An oil discharge port 214b is provided at the bottom of the oil storage chamber 215 to discharge the lubricating oil collected by the oil storage chamber 215 to the compressor. Since the oil storage chamber 215 occupies part of the space of the second condensing chamber 105b, in the refrigeration and air conditioning system using the oil separation structure 201b according to this embodiment, the charge amount of the refrigerant can be reduced.

Compared with the embodiment of FIG. 1a-FIG. 1c, in the embodiment of FIG. 2a-FIG. 2b, a vertical separation plate 213 is added on the side close to the position of the first exhaust port 210.1 and the second exhaust port 210.2, and the vertical separation plate 213 has a similar arrangement to the vertical separation plate 211. As shown in FIG. 2a, two vertical separation plates 211 and 213 are arranged on the side of the position of the first exhaust port 210.1 and the second exhaust port 210.2 to block the upper fluid passage in the separation chamber 203b, and a vertical separation plate 212 is arranged to block the lower fluid passage in the separation chamber 203b. The vertical separation plate 211 is close to the inlet pipe 301a and is located on the side opposite to the outlet 303a of the inlet pipe 301a, the vertical separation plate 213 is close to the position of the first exhaust port 210.1 and the second exhaust port 210.2, and the vertical separation plate 212 is located between the vertical separation plates 211 and 213 in the length direction of the condenser shell. It should be understood that, since the oil separation structure 201b in the embodiment of Fig. 2a-Fig. 2b has no top wall, the vertical separation plates 211 and 213 in the embodiment of Fig. 2a-Fig. 2b extend downward from the 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 provided 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, the refrigerant entering the separation chamber 203b obtains the first centrifugally separated refrigerant and the second centrifugally separated refrigerant after passing through the vertical separation plates 211 and 212. Unlike in the separation chamber 203a, since the separation chamber 203b has a vertical separation plate 213 added at a position close to the first exhaust port 210.1 and the second exhaust port 210.2 compared to the separation chamber 203a, the first centrifugally separated refrigerant and the second centrifugally separated refrigerant are further separated based on the obstruction of the vertical separation plate 213 before reaching the first exhaust port 210.1 and the second exhaust port 210.2. Specifically, the first centrifugally separated refrigerant and the second centrifugally separated refrigerant flow toward the vertical separation plate 213 and hit the vertical separation plate 213. The lubricating oil separated by impact drips into the oil guide channel 219b, and the remaining refrigerant continues to flow toward the first exhaust port 210.1 and the second exhaust port 210.2 as the fourth refrigerant after impact separation. Since the flow of the fourth refrigerant after impact separation is blocked by the vertical separation plate 213, the fourth refrigerant after impact separation changes its flow direction to bypass the obstruction of the vertical separation plate 213. This change in movement direction causes the fourth refrigerant after impact separation to rotate around the vertical separation plate 213 while flowing. The centrifugal force generated by the rotation further causes the lubricating oil in the fourth refrigerant after impact separation to be centrifugally separated, thereby dripping into the oil guide channel 219b, and the remaining refrigerant continues to flow toward the first exhaust port 210.1 and the second exhaust port 210.2 as the third refrigerant after centrifugation separation. Since both sides of the first exhaust port 210.1 and the second exhaust port 210.2 are provided with vertical separation plates 213 close to the two exhaust ports, under the action of the two vertical separation plates 213 which are close to each other, the refrigerant after the third centrifugal separation forms a vortex below the first exhaust port 210.1 and the second exhaust port 210.2. The force, part of the lubricating oil in the refrigerant after the third centrifugal separation is further centrifugally separated below the location of the first exhaust port 210.1 and the second exhaust port 210.2, and falls into the oil guide channel 219b, and the remaining refrigerant as the refrigerant after the fourth centrifugal separation enters the first condensing chamber 104b and the second condensing chamber 105b through the first exhaust port 210.1 and the second exhaust port 210.2 respectively. As in the separation chamber 203a, the lubricating oil is also separated by gravity during the flow of the refrigerant toward the first exhaust port 210.1 and the second exhaust port 210.2 in the separation chamber 203b. In some embodiments, when the distance between the vertical separation plates 211 and 213 is close, the refrigerant arriving between the vertical separation plates 211 and 213 generates a vortex between the vertical separation plates 211 and 213, and the 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 in the refrigerant and the refrigerant gas undergo impact separation, centrifugal separation and gravity separation. The existence of such multiple separation methods enables the present application to provide sufficient oil separation for the refrigerant.

Fig. 3a-Fig. 3b show a condenser 10c according to another embodiment of the present application. Fig. 3a is a cross-sectional view of a condenser 10c according to another embodiment of the present application. Fig. 3b is a cross-sectional view of the condenser 10c shown in Fig. 3a along the C-C direction.

The condenser 10c and the oil separation structure 201c in the embodiment shown in Fig. 3a-Fig. 3b are similar to the condenser 10b and the oil separation structure 201b in the embodiment shown in Fig. 2a-Fig. 2b, respectively, except for the structure of the inlet pipe and the arrangement of the separation plate in the separation chamber. For the purpose of making the description concise, only the differences between the condenser 10c and the condenser 10b are described below.

As shown in FIG. 3 a and FIG. 3 b , the condenser 10 c includes an inlet pipe 301 c . Different from the inlet pipe 301 a , the portion of the inlet pipe 301 c extending into the separation chamber 203 c is a straight pipe, and thus has an outlet 303 c facing downward.

Continuing to refer to Fig. 3a and Fig. 3b, vertical separation plates 217 and 218 are arranged in the separation chamber 203c of the oil separation structure 201c, and 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 used to block the upper airflow path in the separation chamber 203c, and the vertical separation plate 218 is used to block the lower airflow path in the separation chamber 203c. Since the oil separation structure 201c is the same as the oil separation structure 201b, there is no top wall, and the vertical separation plate 217 in the embodiment of Fig. 3a-Fig. 3b extends downward from the inner surface of the shell top of the condenser 10c. In other embodiments, different numbers of vertical separation plates 217 and 218 are arranged in the separation chamber 203c.

The separation chamber 203c is also provided with a transverse separation plate 231, which is arranged transversely to the extension direction of the separation chamber 203c and abuts against the 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 the first exhaust port 210.1 and the second exhaust port 210.2, 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 inlet pipe 301c and the separation plate arrangement in this embodiment can also be applied to the embodiments of Figures 1a-1c and Figures 2a-2b, replacing the inlet pipe and separation plate arrangement therein.

The following describes the process of separating lubricating oil and refrigerant gas from the refrigerant entering the oil separation chamber 203c from the inlet pipe 301c located on the right side of FIG. 3a. It should be understood that the refrigerant entering the oil separation chamber 203c from the inlet pipe 301c located on the left side of FIG. 3a is The process of separating lubricating oil and refrigerant gas from the refrigerant in the separation chamber 203c is similar.

As shown in FIG3a, after the refrigerant is discharged from the outlet 303c of the inlet pipe 301c, it flows toward the horizontal separation plate 231 and hits the horizontal separation plate 231. Through the impact, part of the lubricating oil in the refrigerant is separated, and the separated lubricating oil drips 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 the first impact-separated refrigerant. Part of the first impact-separated refrigerant flows toward the vertical separation plate 217 and hits the vertical separation plate 217, and the impact causes part of the lubricating oil in this part of the first impact-separated refrigerant to be separated and drip into the oil guide channel 219b, and the remaining refrigerant flows toward the first exhaust port 210.1 and the second exhaust port 210.2 as the second impact-separated refrigerant. Since the flow of the second impact-separated refrigerant is blocked by the vertical separation plate 217, the second impact-separated refrigerant rotates around the vertical separation plate 217 when flowing to change direction to bypass the obstruction of the vertical separation plate 217. The centrifugal force generated by the rotation further causes the lubricating oil in the second impact-separated refrigerant to be centrifugally separated, thereby dripping into the oil guide channel 219a, and the remaining refrigerant, as the first centrifugally separated refrigerant, enters the condensation chambers on both sides of the separation chamber 203c through the first exhaust port 210.1 and the second exhaust port 210.2 respectively for cooling. Part of the first impact-separated refrigerant flows toward the vertical separation plate 218 and impacts the vertical separation plate 218. The impact causes part of the lubricating oil in this part of the first impact-separated refrigerant to be separated and drip into the oil guide channel 219b, and the remaining refrigerant, as the third impact-separated refrigerant, flows toward the first exhaust port 210.1 and the second exhaust port 210.2. Since the flow of the third impact-separated refrigerant is blocked by the vertical separation plate 218, the third impact-separated refrigerant rotates around the vertical separation plate 218 during flow to change direction and bypass the obstruction of the vertical separation plate 218. The centrifugal force generated by the rotation further causes the lubricating oil in the third impact-separated refrigerant to be centrifugally separated, thereby dripping into the oil guide channel 219b. The remaining refrigerant, as the second centrifugally separated refrigerant, enters the condensation chambers on both sides of the separation chamber 203c through the first exhaust port 210.1 and the second exhaust port 210.2 for cooling. In addition, part of the first impact-separated refrigerant flows toward the end wall 207 and hits the end wall 207. The impact causes part of the lubricating oil in this part of the first impact-separated refrigerant to be separated and drip into the oil guide channel 219b at the bottom of the separation chamber 203c. The remaining refrigerant, as the fourth impact-separated refrigerant, changes direction and flows toward the first exhaust port 210.1 and the second exhaust port 210.2, and further impacts and centrifugally separates at the vertical separation plates 217 and 218. As in the separation chambers 203a and 203b, the lubricating oil also undergoes gravity separation during the refrigerant flowing toward the first exhaust port 210.1 and the second exhaust port 210.2 in the separation chamber 203c. In some embodiments, when the vertical separation plates 217 on both sides of the first exhaust port 210.1 and the second exhaust port 210.2 are close to each other, the refrigerant arriving at the first exhaust port 210.1 and the second exhaust port 210.2 generates a vortex between the two vertical separation plates 217, and the 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 203c, the lubricating oil and refrigerant gas in the refrigerant undergo impact separation, centrifugal separation and gravity separation. The presence of such multiple separation methods simultaneously enables the present application to provide sufficient oil separation.

The embodiments of the present application have at least the following technical effects:

1. The oil separation structure used in the present application provides a variety of separation methods, including impact separation, centrifugal separation and gravity separation, so the oil separation structure of the present application can provide sufficient oil separation.

2. Due to the structure of the oil separation structure of the present application and the excellent oil separation effect it provides, it is not required that the oil separation structure provide a large separation chamber for oil separation. The vertical separation plate provided in the separation chamber of the present application forms a barrier in the process of the refrigerant flowing toward the first and second discharge ports, thereby reducing the flow speed of the refrigerant in the separation chamber and ensuring that the refrigerant flies in the separation chamber for enough time to complete the oil separation. Therefore, the oil separation structure of the present application is designed to have a small-sized separation chamber. The small size of the oil separation structure of the present application enables most of the condenser cavity to be used as a condensation chamber, thereby improving the heat exchange capacity of the condenser. Specifically, as stated above, the width dimension of the handle of the separation chamber is designed to be slightly larger than the diameter of the inlet pipe, which makes the handle have a very small width. Therefore, in the present application, the oil separation structure only occupies a very small part of the condenser cavity, which enables the condenser cavity to provide a large space for condensation. Therefore, in the present application, most of the space of the condenser cavity is occupied by the two condensation chambers on both sides of the oil separation structure, so that there is no need to increase the size of the condenser, and many condensation tubes can be arranged in the two condensation chambers to ensure the heat exchange capacity of the condenser. On the contrary, if the vertical separation plate is not provided in the separation chamber, in order to allow the refrigerant to fly in the separation chamber for a sufficient time to complete the oil separation, the separation chamber needs to be designed to have a large size to reduce the flying speed of the refrigerant therein. In this case, since the separation chamber occupies a lot of space in the condenser cavity, only a small amount of the condenser cavity can be used as a condensation chamber to complete the condensation of the refrigerant gas, thereby reducing the heat exchange capacity of the condenser.

3. The present application utilizes an oil separation structure so that the condenser cavity includes two condensation chambers located on both sides of the separation chamber, which is beneficial to improving the heat exchange efficiency. Specifically, assuming that the oil separation structure is set on one side of the cavity, so that the cavity includes a separation chamber and a single condensation chamber, then in the width direction of the condenser shell, the size of the assumed single condensation chamber is larger than the size of any one of the two condensation chambers according to the present application. Thus, compared with any one of the two condensation chambers according to the present application, a larger number of condensation tubes will be arranged in the assumed single condensation chamber. This makes it more difficult for the refrigerator gas to be cooled in the assumed single condensation chamber to flow toward the condensation tube located in the middle of the assumed single condensation chamber, and it is more difficult to reach the condensation tube located in the middle of the assumed single condensation chamber, so that it is difficult to exchange heat with the cooling fluid in the condensation tube located in the middle of the assumed single condensation chamber to achieve cooling. Therefore, assuming that the oil separation structure is set on one side of the cavity, so that the cavity includes a separation chamber and a single condensation chamber, the heat exchange efficiency of the condenser will be lost. On the contrary, the oil separation structure of the present application makes the condenser cavity include two condensation chambers located on both sides of the oil separation structure, so that each condensation chamber is respectively provided with a smaller number of condensation tubes, so that the refrigerant gas to be cooled entering each condensation chamber can easily reach the condensation tubes located in the middle of the two condensation chambers to achieve heat exchange with the cooling fluid in these condensation tubes, thereby facilitating the improvement of heat exchange efficiency.

4. When the separation chamber is arranged in the center of the condenser cavity in the width direction of the condenser shell, the two condensation chambers on both sides of the separation chamber have the same size. Therefore, the size of the two condensation chambers in the width direction of the condenser shell will not be too large, so that In the width direction of the shell, both condensing chambers are provided with a suitable number of condensing tubes, which is further conducive to the refrigerator gas to be cooled entering each condensing chamber to easily reach the condensing tube located in the middle of each condensing chamber, that is, further conducive to improving the heat exchange efficiency.

5. When the inlet pipe is arranged centered on the top of the shell in the width direction of the condenser shell and the separation chamber is arranged centered in the condenser cavity in the width direction of the condenser shell, the refrigerant has the maximum flight height after entering the separation chamber, so the refrigerant has the longest flight time in the separation chamber, which is further beneficial to fully separate the lubricating oil in the refrigerant in the separation chamber.

6. The funnel-shaped structure of the separation chamber of the present application enables the refrigerant to have a larger flow velocity at the handle of the separation chamber, which is conducive to the impact separation and centrifugal separation of the lubricating oil by means of the vertical separation plate, while the flow velocity is reduced at the mouth of the separation chamber, which increases the flight time of the refrigerant at the mouth, which is conducive to the gravity separation of the lubricating oil. At the same time, in the embodiment of using a filter screen in conjunction, the reduction of the refrigerant flow velocity at the mouth of the separation chamber is conducive to the further capture and separation of the lubricating oil by the filter screen.

Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, various alternatives, modifications, changes, improvements and/or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be 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; so the disclosure in this specification may be used to solve other technical problems and have other technical effects and/or may solve other technical problems. Therefore, the examples of the embodiments of the present disclosure as stated 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. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, changes, improvements and/or substantially equivalent solutions.

Claims (14)

A condenser with an oil separation structure, characterized in that it comprises: A shell (101), the shell (101) defining a volume chamber (102), the shell (101) being provided with at least one inlet pipe (301a, 301c) for receiving a refrigerant containing lubricating oil to be condensed, the shell (101) comprising a length direction, a height direction and a width direction; An oil separation structure (201a, 201b, 201c), the oil separation structure (201a, 201b, 201c) being fixed in the housing (102), the oil separation structure (201a, 201b, 201c) comprising a separation chamber (203a, 203b, 203c), the at least one inlet pipe (301a, 301c) extending into the separation chamber (203a, 203b, 203c), wherein the separation chamber (203a, 203b, 203c) is configured to separate the lubricating oil and refrigerant gas in the refrigerant; The containing cavity (102) comprises a first condensation chamber (104a, 104b) and a second condensation chamber (105a, 105b) separated by the oil separation structure (201a, 201b, 201c); the first condensation chamber (104a, 104b) and the second condensation chamber (105a, 105b) are respectively located on both sides of the separation chamber (203a, 203b, 203c) in the width direction of the shell (101), and respectively extend along the length direction of the shell (101); and The upper part of the oil separation structure (201a, 201b, 201c) is provided with a first exhaust port (210.1) and a second exhaust port (210.2) for respectively connecting the first condensation chamber (104a, 104b) and the second condensation chamber (105a, 105b) with the separation chamber (203a, 203b, 203c) fluid, 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) for condensation, and the 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 with a built-in oil separation structure according to claim 1 is characterized in that: The separation chamber (203a, 203b, 203c) is centrally arranged in the housing (102) in the width direction of the housing (101). The condenser with a built-in oil separation structure according to claim 2 is characterized in that: The oil separation structure (201a, 201b, 201c) comprises a plurality of vertical separation plates (211, 212, 213, 217, 218) arranged in the separation chamber (203a, 203b, 203c) at intervals along the length direction of the housing (101), wherein the plurality of vertical separation plates (211, 212, 213, 217, 218) are arranged in the separation chamber (203a, 203b, 203c) at intervals. Each of the vertical separation plates (211, 212, 213, 217, 218) is arranged transversely to the extension direction of the separation chamber (203a, 203b, 203c), wherein at least a portion of the vertical separation plates (211, 213, 217) is configured to block the upper fluid passage in the separation chamber (203a, 203b, 203c), and at least another portion of the vertical separation plates (212, 218) is configured to block the lower fluid passage in the separation chamber (203a, 203b, 203c). The condenser with a built-in oil separation structure according to claim 3 is characterized in that: On one side of the first exhaust port (210.1) and the second exhaust port (210.2), at least a portion of the vertical separation plates (211, 213, 217) that blocks the upper fluid passage in the separation chamber (203a, 203b, 203c) and at least another portion of the vertical separation plates (212, 218) that blocks the lower fluid passage in the separation chamber (203a, 203b, 203c) are alternately arranged. The condenser with a built-in oil separation structure according to claim 4 is characterized in that: The at least one inlet pipe (301a, 301c) is arranged at the top of the housing (101) in the center in the width direction of the housing (101). The condenser with a built-in oil separation structure according to claim 5 is characterized in that: The portion of the at least one inlet pipe (301c) extending into the separation chamber (203c) extends along 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 with a built-in oil separation structure according to claim 5 is characterized in that: The portion of the 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 exhaust port (210.1) and the second exhaust port (210.2). The condenser with a built-in oil separation structure according to claim 5 is characterized in that: The separation chamber (203a, 203b, 203c) extends along the length direction of the shell (101), and the cross-section of the separation chamber (203a, 203b, 203c) in a plane parallel to the height direction and the width direction of the shell (101) is generally funnel-shaped, so that the separation chamber (203a, 203b, 203c) has a mouth (221a) and a handle (222a), and the width dimension (W1, W2) of the handle (222a) is designed to be slightly larger than the diameter d of the at least one inlet pipe (301a, 301c). The condenser with a built-in oil separation structure according to claim 4 is characterized in that: The oil separation structure (201a) comprises a shell (202a), the shell (202a) defines the separation chamber (203a), the shell (202a) comprises opposite side walls (204, 205) connected to each other, opposite end walls (206, 207) and opposite top walls (208) and bottom walls (209a), the top wall (208) abuts against the top inner surface of the shell (101), and the upper parts of the opposite side walls (204, 205) are respectively provided with the first exhaust port (210.1) and the second exhaust port (210.2); and At least a portion of the vertical separation plate (211) that blocks the upper fluid passage in the separation chamber (203a) extends from the top wall (208) to at least a portion of the height of the separation chamber (203a), and at least another portion of the vertical separation plate (212) that blocks the lower fluid passage in the separation chamber (203a) extends from the bottom of the oil separation structure (201a) to at least a portion of the height of the separation chamber (203a). The condenser with a built-in oil separation structure according to claim 4 is characterized in that: The oil separation structure (201b, 201c) comprises a shell, the shell defines the separation chamber (203b, 203c), the shell comprises opposite side walls (204, 205) connected to each other, opposite end walls (206, 207) and a bottom wall (209b), the tops of the opposite side walls (204, 205) and the opposite end walls (206, 207) abut against the top inner surface of the shell (101), and the upper parts of the opposite side walls (204, 205) are respectively provided with the first exhaust port (210.1) and the second exhaust port (210.2); and At least a portion of the vertical separation plates (211, 213, 217) that blocks the upper fluid passage in the separation chamber (203b, 203c) extends from the top inner surface of the shell (101) of the condenser to at least a portion of the height of the separation chamber (203b, 203c), and at least a portion of the vertical separation plates (211, 213, 217) that blocks the lower fluid passage in the separation chamber (203b, 203c) extends from the top inner surface of the shell (101) of the condenser to at least a portion of the height of the separation chamber (203b, 203c). At least another portion of the vertical separation plate (212, 218) extends from the bottom of the oil separation structure (201b, 201c) to at least a portion of the height of the separation chamber (203b, 203c). The condenser with a built-in oil separation structure according to claim 9 or 10 is characterized in that: The at least another portion of the vertical separation plates (212, 218) that blocks the lower fluid passage in the separation chamber (203a, 203b, 203c) is spaced a certain distance from the bottom wall (209a, 209b) to define an oil guide channel (219a, 219b). The condenser with a built-in oil separation structure according to claim 9 or 10 is characterized in that: The bottom wall (209a) of the oil separation structure (201a) abuts against the bottom inner surface of the housing (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 the bottom of the cavity (102); the first subcooling box (107.1) and the second subcooling box (107.2) are respectively located on both sides of the oil separation structure (201a) in the width direction of the shell (101). The condenser with a built-in oil separation structure according to claim 9 or 10 is characterized in that: The condenser comprises a supercooling box (107) arranged at the bottom of the cavity (102), and the bottom wall (209b) of the oil separation structure (201b, 201c) abuts against the supercooling box (107); and The oil separation structure (201b, 201c) also includes at least one oil storage chamber (215) arranged at the bottom of the oil separation structure (201b, 201c) and connected to the bottom of the separation chamber (203b, 203c), and the at least one oil discharge port (214b) is arranged at the bottom of the corresponding at least one oil storage chamber (215), wherein the at least one oil storage chamber (215) is accommodated at the bottom of one of the first condensation chamber (104) and the second condensation chamber (105). A refrigeration and air conditioning system, characterized in that: The refrigeration and air-conditioning system comprises a condenser with a built-in oil separation structure according to any one of claims 1 to 13.