CN214199304U - Gas-liquid separation structure, heat exchanger and air conditioner - Google Patents

Abstract

The utility model discloses a gas-liquid separation structure, heat exchanger and air conditioner. The gas-liquid separation structure comprises a separation cavity, an inlet of gas-liquid two-phase fluid, a first gas outlet and a liquid outlet, wherein the first gas outlet is positioned on the upper side of the liquid outlet, a gas branch flow path and a liquid branch flow path are arranged in the separation cavity, the first end of the gas branch flow path is communicated with the inlet, the second end of the gas branch flow path extends upwards and is communicated with the first gas outlet, the first end of the liquid branch flow path is communicated with the inlet, and the second end of the liquid branch flow path extends downwards and is communicated with the liquid outlet. The liquid outlet of the gas-liquid separation structure is communicated with the inlet collecting pipe of the heat exchanger, and the first gas outlet is communicated with the outlet collecting pipe of the heat exchanger through a gaseous refrigerant flow path. The utility model provides a technical scheme sets up the gas-liquid separation structure before the entry mass flow pipeline of heat exchanger, can separate double-phase refrigerant, and the liquid refrigerant of separation can carry out evenly distributed between a plurality of refrigerant heat transfer flow paths, has improved the heat exchange efficiency of heat exchanger.

Description

Gas-liquid separation structure, heat exchanger and air conditioner

Technical Field

The utility model relates to an air conditioning equipment field, concretely relates to gas-liquid separation structure, heat exchanger and air conditioner.

Background

For a general heat exchanger, when the evaporation condition is adopted, the inlet is a gas-liquid two-phase refrigerant, and the two-phase refrigerant is easily distributed in the inlet collecting pipe unevenly, so that the heat exchange efficiency of the heat exchanger is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a gas-liquid separation structure, heat exchanger and air conditioner aims at solving the two-phase refrigerant of gas-liquid and distributes uneven problem in the heat exchanger.

In order to achieve the above object, an embodiment of the present invention provides a gas-liquid separation structure, including the import, the first gas outlet and the liquid outlet of separation cavity, gas-liquid two-phase flow, the first gas outlet is located the upside of liquid outlet, be equipped with gaseous branch flow path and liquid branch flow path in the separation cavity, the first end of gaseous branch flow path with the import intercommunication, the second end upwards extend and with first gas outlet intercommunication, the first end of liquid branch flow path with import intercommunication, the second end downwardly extending and with the liquid outlet intercommunication.

The embodiment of the utility model provides a still provide a heat exchanger, including the heat exchanger main part, the heat exchanger main part includes entry mass flow pipeline, export mass flow pipeline and intercommunication entry mass flow pipeline with a plurality of refrigerant heat transfer flow paths that set up side by side of export mass flow pipeline, wherein, the heat exchanger still includes foretell gas-liquid separation structure, gas-liquid separation structure's liquid export with entry pressure manifold intercommunication, gas-liquid separation structure's first gas outlet with export mass flow pipeline passes through gaseous state refrigerant flow path intercommunication.

The embodiment of the utility model provides a still provide an air conditioner, the air conditioner includes as above the heat exchanger.

The utility model discloses among the technical scheme, gas-liquid separation can be realized to the gas-liquid separation structure, sets up the gas-liquid separation structure before the entry mass flow pipeline of heat exchanger, can separate double-phase refrigerant, and the liquid refrigerant of separation can carry out evenly distributed between a plurality of refrigerant heat transfer flow paths, has improved the heat exchange efficiency of heat exchanger. The separated gaseous refrigerant does not pass through the refrigerant heat exchange flow path, but flows to the outlet collecting pipe after passing through the gaseous refrigerant flow path.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of refrigerant flow to a heat exchanger in some cases;

fig. 2 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

FIG. 3 is a schematic view of a portion of the heat exchanger of FIG. 2;

FIG. 4 is a schematic perspective view of a cross-sectional configuration of the heat exchanger of FIG. 2;

fig. 5 is an enlarged schematic view of the M-part structure in fig. 4.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in fig. 2 and 3), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

As shown in fig. 1, a gas-liquid two-phase refrigerant 3 flows into an inlet header 2 of a heat exchanger in an evaporation condition through an input pipe 1 (the input pipe 1 is provided with an expansion valve 5). When flowing in the input pipe 1, the two-phase refrigerant 3 starts to be a homogeneous flow, and sequentially goes through an expansion phase (expansion phase) a, a development phase (degraded phase) B in which the gaseous refrigerant 31 and the liquid refrigerant 32 are gradually separated, and a completion phase (degraded phase) C in which the gaseous refrigerant 31 and the liquid refrigerant 32 are gradually separated. Therefore, the two-phase refrigerant 3 entering the inlet header 2 is in a non-homogeneous state of gas-liquid separation, which causes uneven distribution of the refrigerant in the inlet header 2, and further causes uneven distribution in the plurality of parallel refrigerant heat exchange flow paths 4, thereby affecting the heat exchange efficiency of the heat exchanger.

The utility model provides a gas-liquid separation structure, heat exchanger and air conditioner can separate gaseous state refrigerant and liquid refrigerant through the gas-liquid separation structure, then utilizes single-phase liquid refrigerant to carry out the heat transfer in getting into the heat exchanger main part for the distribution of liquid refrigerant in the heat exchanger main part is even, and the heat exchange efficiency of heat exchanger is high.

Referring to fig. 3, in an embodiment of the present invention, the gas-liquid separation structure 100 includes a separation chamber 101, an inlet 102 for a gas-liquid two-phase fluid, a first gas outlet 103 and a liquid outlet 104, the first gas outlet 103 is located on an upper side of the liquid outlet 104, a gas branch flow path 106 and a liquid branch flow path 107 are disposed in the separation chamber 101, a first end of the gas branch flow path 106 is communicated with the inlet 102, a second end thereof extends upward and is communicated with the first gas outlet 103, a first end of the liquid branch flow path 107 is communicated with the inlet 102, and a second end thereof extends downward and is communicated with the liquid outlet 104.

In the gas-liquid separation structure 100, the inlet 102, the first gas outlet 103, and the liquid outlet 104 are all communicated with the separation chamber 101. The inlet 102 may be configured to allow a gas-liquid two-phase fluid (e.g., a gas-liquid two-phase refrigerant) to enter the separation cavity 101, the gas-liquid two-phase fluid is separated in the separation cavity 101, the separated gas (e.g., a gaseous refrigerant) is discharged from the first gas outlet 103, and the separated liquid (e.g., a liquid refrigerant) is discharged from the liquid outlet 104.

The separation process of the gas-liquid two-phase fluid in the separation chamber 101 is as follows.

The gas-liquid two-phase fluid can enter the separation cavity 101 from the inlet 102, and then more gas in the two-phase fluid flows upwards, so that the gas flows upwards along the gas branch flow path 106 extending upwards and then is discharged out of the separation cavity 101 through the first gas outlet 103 on the upper side of the liquid outlet 104; more liquid in the two-phase fluid flows downward, and therefore the liquid flows down along the liquid branch flow path 107 extending downward, and then is discharged out of the separation chamber 101 through the liquid outlet 104 on the lower side of the first gas outlet 103.

The gas and liquid in the gas-liquid two-phase fluid can be separated by arranging the gas separation structure. As shown in fig. 2, when the separation structure is used in the heat exchanger 200 under the evaporation condition, the gas-liquid two-phase refrigerant entering the heat exchanger 200 can be separated, so that the refrigerant is prevented from being unevenly distributed in the main body of the heat exchanger, and the heat exchange efficiency of the heat exchanger 200 is improved.

In some exemplary embodiments, as shown in fig. 3, a first partition plate 108 is vertically disposed in the separation cavity 101, the inlet 102 is located on a first side of the first partition plate 108 (left side of the first partition plate 108 in fig. 3), a plate surface of the first side of the first partition plate 108 (left plate surface of the first partition plate 108 in fig. 3) cooperates with a cavity wall of the separation cavity 101 to form a first chamber 109, the first chamber 109 cooperates with the inlet 102 to form a T-shaped channel, a portion of the first chamber 109 located on an upper side of the inlet 102 forms the gas branch flow path 106, and a portion located on a lower side of the inlet 102 forms the liquid branch flow path 107.

The first gas outlet 103 and the liquid outlet 104 are located on the second side of the first partition 108 (the right side of the first partition 108 in fig. 3), and a first communication gap 110 is provided between the upper end surface of the first partition 108 and the top wall 1013 of the separation chamber 101, and a second communication gap 111 is provided between the lower end surface of the first partition 108 and the bottom wall 1014 of the separation chamber 101.

As shown in fig. 3, the inlet 102 is horizontally or substantially horizontally disposed, a first chamber 109 is formed between the first partition 108 and the left side wall 1011 of the separation chamber 101, and the inlet 102 communicates with the middle of the first chamber 109, so that the inlet 102 and the first chamber 109 are connected to form a T-shaped channel (three-way structure). The upper portion of the first chamber 109 (i.e., the portion located on the upper side of the inlet 102) forms the gas branch flow path 106, and the lower portion of the first chamber 109 (i.e., the portion located on the lower side of the inlet 102) forms the liquid branch flow path 107, so that the gas in the gas-liquid two-phase fluid entering from the inlet 102 flows upward along the gas branch flow path 106 on the upper side, and the liquid in the gas-liquid two-phase fluid flows downward along the liquid branch flow path 107 on the lower side.

The upper end surface of the first separator 108 has a space from the top wall 1013 of the separation chamber 101, which forms a first communicating gap 110, so that the gas in the gas branch flow path 106 flows to the right side of the first separator 108 through the first communicating gap 110 and flows out through the first gas outlet 103 on the right side of the first separator 108. A space is provided between the lower end surface of the first partition plate 108 and the bottom wall 1014 of the separation chamber 101, the space forming a second communication gap 111, so that the liquid in the liquid branch flow path 107 flows to the right side of the first partition plate 108 through the second communication gap 111 and flows out through the liquid outlet 104 on the right side of the first partition plate 108.

In some exemplary embodiments, the front and rear ends of the first barrier 108 may be sealingly connected to the front and rear sidewalls of the separation chamber 101, the upper and lower ends of the first barrier 108 are spaced apart from the top wall 1013 and the bottom wall 1014 of the separation chamber 101, and the left and right sides of the first barrier 108 are spaced apart from the left sidewall 1011 and the right sidewall 1012 of the separation chamber 101.

The first partition 108 and the separation chamber 101 (or a part of the separation chamber 101) may be an integral structure, or the first partition 108 and the separation chamber 101 may be a split assembly structure.

In some exemplary embodiments, as shown in fig. 3, a second side plate surface of the first partition 108 (a right side plate surface of the first partition 108 in fig. 3) cooperates with a wall of the separation chamber 101 to form a second chamber 112, a second partition 113 is transversely disposed in the second chamber 112, the second partition 113 is located above the first gas outlet 103 and below an upper end surface of the first partition 108, and a liquid collecting area 114 is formed on an upper side of the second partition 113.

The first baffle 108 and the right side wall 1012 of the separation cavity 101 form a second chamber 112, a second baffle 113 is transversely arranged in the second chamber 112, and a space is formed between the second baffle 113 and the top wall 1013 of the separation cavity 101, and the space forms a liquid collecting area 114. After flowing to the uppermost portion along the gas branch flow path 106, the gas is thrown to the right in the horizontal direction through the first communicating gap 110, the liquid and impurities entrained in the gas fall to the liquid collecting region 114 due to the large inertia and gravity, and the gas flows downward and then flows out from the first gas outlet 103 at the lower side of the second partition 113.

The first gas outlet 103 is provided below the second separator 113, so that the gas-liquid separation structure 100 is compact and small in size.

It should be understood that the first gas outlet 103 may be disposed above the second partition 113 so that the liquid and impurities entrained in the gas fall to the liquid collecting region 114 after the gas is thrown out through the gas branch flow path 106 and the first communicating gap 110, and the gas flows upward and then flows out from the first gas outlet 103 on the upper side of the second partition 113.

In some exemplary embodiments, as shown in fig. 3, one end of the second partition 113 near the first partition 108 (the left end of the second partition 113 in fig. 3) is provided with a first folding edge 1131 which is bent upward, and the first folding edge 1131 is lower than the upper end surface of the first partition 108.

The right end of the second partition 113 is horizontally disposed, the left end of the second partition 113 is provided with a first folding edge 1131, and the first folding edge 1131 is bent upwards to prevent the liquid or impurities in the liquid collecting region 114 from flowing out from the left side. The top end of the first folding edge 1131 (i.e., the left end of the second partition 113 in fig. 3) is lower than the upper end surface of the first partition 108 so as not to interfere with the liquid and foreign substances entrained in the gas falling down to the liquid collecting region 114 by inertia and gravity.

In some exemplary embodiments, as shown in FIG. 3, the first fold 1131 makes an angle α 2 of 10-45 with the horizontal. It should be understood that the angle α 2 is not limited to the above range, and can be designed according to actual needs.

In some exemplary embodiments, as shown in fig. 3, a third partition 115 is disposed in the second chamber 112, the third partition 115 divides the second chamber 112 into an upper gas exhaust chamber 119 and a lower liquid exhaust chamber 120, the first gas outlet 103 is disposed on a wall of the gas exhaust chamber 119, and the liquid outlet 104 is disposed on a wall of the liquid exhaust chamber 120.

The third partition 115 partitions the second chamber 112, a portion of the second chamber 112 located on an upper side of the third partition 115 forms a gas discharge chamber 119, and a portion of the second chamber 112 located on a lower side of the third partition 115 forms a liquid discharge chamber 120. The third partition plate 115 is disposed to reduce the gas in the upper gas discharge chamber 119 from entering the liquid discharge chamber 120, so as to prevent the separated gas from mixing with the liquid, thereby improving the gas-liquid separation effect of the gas-liquid separation structure.

In some exemplary embodiments, as shown in fig. 3, a return line (not shown) is disposed in the separation chamber 101, and the liquid collecting region 114 is communicated with the liquid discharging chamber 120 through the return line.

The liquid collecting area 114 is located in the gas exhaust chamber 119 and on the upper side of the liquid exhaust chamber 120, and the liquid collecting area 114 communicates with the liquid exhaust chamber 120 through a return line so that the liquid collected in the liquid collecting area 114 flows to the liquid exhaust chamber 120 and is exhausted from the liquid outlet 104 together with the liquid of the liquid branch flow path 107.

In some exemplary embodiments, the return line may include at least one semicircular line having an upper end communicating with the liquid collection area 114 and a lower end communicating with the liquid discharge chamber 120. The semicircular pipelines may be provided in two and symmetrically disposed at both sides of the liquid collecting region 114 and the liquid discharging chamber 120 to achieve communication between the liquid collecting region 114 and the liquid discharging chamber 120.

In some exemplary embodiments, as shown in fig. 3, the third partition plate 115 is an inclined plate having a flow guide function, the third partition plate 115 is connected to the lower end of the first gas outlet 103, and one end (left end in fig. 3) of the third partition plate 115 near the first partition plate 108 is inclined downward and forms a flow guide gap 116 with the first partition plate 108.

The first gas outlet 103 is located on the right sidewall 1012 of the separation chamber 101, the right end of the third partition plate 115 is connected to the lower end of the first gas outlet 103, the left end of the third partition plate 115 is inclined downward, and a guide gap 116 is formed between the left end of the third partition plate 115 and the first partition plate 108, so that liquid entrained in the gas exhaust chamber 119 adheres to the inclined third partition plate 115, and the adhered liquid can flow downward along the plate surface of the third partition plate 115 under the action of gravity and finally flows into the lower liquid exhaust chamber 120 through the guide gap 116 to be exhausted together with the liquid in the liquid exhaust chamber 120 from the liquid outlet 104 after being collected.

In some exemplary embodiments, as shown in FIG. 3, the angle α 1 between the third baffle 115 and horizontal is 20-45. It should be understood that the angle α 1 is not limited to the above range, and can be designed according to actual needs.

In some exemplary embodiments, as shown in fig. 3, the liquid discharge chamber 120 is provided with a second gas outlet 105 on the wall thereof, and the second gas outlet 105 is located on the upper side of the liquid outlet 104.

The second gas outlet 105 is disposed on the right side wall of the liquid discharging chamber 120 (i.e. the right side wall 1012 of the separation chamber 101), and the liquid outlet 104 is also disposed on the right side wall of the liquid discharging chamber 120 and is disposed below the second gas outlet 105, so that the gas entrained in the liquid flowing out from the liquid branch flow path 107 can flow out through the second gas outlet 105, and the entrained gas is prevented from being discharged from the liquid outlet 104, resulting in the mixture of the separated gas and liquid, which is favorable for further separation of gas and liquid.

In some exemplary embodiments, as shown in fig. 3, a transversely disposed fourth partition 117 is disposed in the liquid discharge chamber 120, the liquid outlet 104 is located on an upper side of the fourth partition 117, an impurity deposition area 118 is formed on a lower side of the fourth partition 117, and the liquid collection area 114 is communicated with the impurity deposition area 118 through a return line.

A fourth partition plate 117 is arranged in the liquid discharge chamber 120, a liquid outlet 104 is arranged on the upper side of the fourth partition plate 117, a space is formed between the fourth partition plate 117 and the bottom wall of the liquid discharge chamber 120 (i.e. the bottom wall 1014 of the separation chamber 101), the space forms an impurity deposition area 118, so that the liquid in the liquid branch flow path 107 moves downwards to the lowest end and then is thrown rightwards through the second communication gap 111, impurities in the liquid are deposited in the impurity deposition area 118 on the lower side under the action of inertia, gas entrained in the liquid is discharged through the second gas outlet 105 on the upper side of the liquid outlet 104, and the liquid is discharged through the liquid outlet 104.

The liquid collecting region 114 in the gas exhaust chamber 119 communicates with the impurity deposition region 118 through a return line so that the impurities in the liquid collecting region 114 can flow to the impurity deposition region 118 together with the collected liquid and eventually accumulate in the impurity deposition region 118. The impurity deposition area 118 is arranged, so that impurities of the fluid can be deposited, and the impurities are prevented from flowing along with the liquid, and further the impurities block a flowing pipeline of the liquid. When the gas separation structure 100 is used for a heat exchanger, the impurity deposition region 119 can deposit impurities in a refrigerant, so that the impurities are prevented from blocking the refrigerant heat exchange flow path 206 of the heat exchanger 200, the service performance of the heat exchanger 200 is improved, and the maintenance and replacement frequency of the heat exchanger 200 is reduced.

In some exemplary embodiments, as shown in fig. 3, one end of the fourth separator 117 near the first separator 108 (the left end of the fourth separator 117 in fig. 3) is provided with a second flange 1171 bent downward.

The right end of the fourth partition plate 117 is horizontally arranged and connected with the right side wall (i.e. the right side wall 1012 of the separation chamber 101) of the liquid discharge chamber 120, the left end of the fourth partition plate 117 is provided with a second flange 1171, and the second flange 1171 is bent downwards, so that on one hand, the arrangement of the second flange 1171 can reduce the opening area on the left side of the impurity deposition region 118, can prevent impurities in the impurity deposition region 118 from flowing out of the impurity deposition region 118 along with the backflow of the liquid, and reduce the amount of the impurities in the liquid; on the other hand, the second flange 1171 serves as a guide so that the liquid thrown through the second communication gap 111 flows upward along the inclined second flange 1171 and flows along the fourth partition 117 into the liquid outlet 104 on the upper side of the fourth partition 117.

In some exemplary embodiments, as shown in fig. 3, the lower end of the second flange 1171 is lower than the lower end surface of the first partition 108, so as to guide more liquid to the liquid outlet 104, and the guiding effect is better, which is beneficial to the smooth flowing of the liquid from the liquid outlet 104.

In some exemplary embodiments, as shown in FIG. 3, the angle α 3 between the second flange 1171 and horizontal is 5-30. It should be understood that the angle α 3 is not limited to the above range, and can be designed according to actual needs.

In some exemplary embodiments, as shown in fig. 3, an end of the bottom wall of the impurity deposition region 118 (a right end of the impurity deposition region 118 in fig. 3) away from the first partition 108 is provided with a recess 1181.

A recessed portion 1181 is arranged at the right end of the bottom wall of the impurity deposition region 118 (i.e., the bottom wall 1014 of the separation cavity 101), and the recessed portion 1181 is far away from the open end formed by the second folded edge 1171 on the left side of the impurity deposition region 118, so that impurities can be gathered in the recessed portion 1181, and the impurities can be reduced from flowing out of the impurity deposition region 118 along with the returned liquid.

In some exemplary embodiments, as shown in FIG. 3, the cross-sectional flow area of the inlet 102 is S1 and the cross-sectional flow area of the gas branch flow path 106 is S2, wherein: s2 ═ (1-1.6) S1, i.e., S2 takes on a value in the range of 1 × S1 to 1.6 × S1 (the same applies hereinafter).

In some exemplary embodiments, the cross-sectional flow area of liquid branch flow path 107 is S3, where: s3 ═ (1-1.6) S1.

In some exemplary embodiments, the first communication gap 110 has a cross-sectional flow area S4, wherein: s4 ═ (0.9-1.45) S1.

In some exemplary embodiments, the second communication gap 111 has a cross-sectional flow area S5, wherein: s5 ═ (0.9-1.45) S1.

In some exemplary embodiments, the first gas outlet 103 has a cross-sectional flow area S6, wherein: s6 ═ (1.2-1.6) S1.

In some exemplary embodiments, the second gas outlet 105 has a cross-sectional flow area S7, wherein: s7 ═ (0.15-0.2) S1.

In some exemplary embodiments, the flow cross-sectional area of the flow guide gap 116 is S8, wherein: s8 ═ (0.1-0.15) S1.

In some exemplary embodiments, the liquid outlet 104 has a cross-sectional flow area S9, wherein: s9 ═ (0.7-0.85) S1.

In some exemplary embodiments, a cross-sectional flow area S2 of gas branch flow path 106 and a cross-sectional flow area S3 of liquid branch flow path 107 may be equal.

In some exemplary embodiments, as shown in FIG. 3, the inlet 102 has an equivalent diameter D1. The relationship between the equivalent diameter D1 of the inlet 102 and the cross-sectional flow area S1 is: d1 is 2 × S1/L, where L denotes the wet circumference, which is the contact length of the fluid with the inner wall surface of the inlet 102.

In some exemplary embodiments, the height of the liquid branch flow path 107 is h1, wherein: h1 ═ (6-10) D1, i.e., h1 takes on values ranging from 6 × D1 to 10 × D1 (the same applies below).

In some exemplary embodiments, the height of the gas branch flow path 106 is h2, wherein: h2 ═ 10-12D 1.

In some exemplary embodiments, the height of the impurity deposition region 118 is h3, wherein: h3 ═ (1.2-1.4) D1.

In some exemplary embodiments, the height of the liquid collection area 114 is h4, wherein: h4 ═ D1 (2.5-4).

In some exemplary embodiments, the height difference between the second baffle 113 and the first gas outlet 103 is h5, wherein: h5 ═ 5-8D 1.

The relationship between the cross-sectional area and the height of the gas-liquid separation structure is set, so that the flow channel in the separation cavity 101 has a turn of 90-180 degrees on the whole, and has larger height drop, which is beneficial to enhancing the gas-liquid separation effect of the gas-liquid separation structure.

It should be understood that the relationship between the cross-sectional flow area and the height is not limited to the above range, and may be designed according to actual needs.

In some exemplary embodiments, as shown in FIG. 3, the inlet 102 may be positioned higher than the liquid outlet 104, the inlet 102 may be positioned lower than the first gas outlet 103, and the inlet 102 may be positioned lower than the second gas outlet 105.

Of course, the positional relationship between the inlet 102 and the liquid outlet 104, the first gas outlet 103, and the second gas outlet 105 is not limited to the above, and the positional relationship may be changed according to actual needs.

The gas-liquid separation structure 100 of the embodiment of the present invention has an inlet 102 and a gas branch flow path 106 and a liquid branch flow path 107 respectively disposed in the upper and lower portions, wherein the gas of the upper gas branch flow path 106 and the liquid of the lower liquid branch flow path 107 are flowed. The flow channel in the separation cavity 101 is turned by 90-180 degrees on the whole, and has larger height drop, so that after the gas-liquid two-phase fluid enters the separation cavity 101 from the inlet 102, the gas in the gas-liquid two-phase fluid flows to a high position along the gas branch flow path 106, then is horizontally thrown out, flows out from the first gas outlet 103 after passing through the liquid collecting region 114, and when the gas passes through the liquid collecting region 114, the liquid in the gas is collected in the liquid collecting region 114 and finally flows to the impurity deposition region 118; the liquid in the gas-liquid two-phase fluid flows to the lower part along the liquid branch flow path 107, then is horizontally thrown out, passes through the impurity deposition area 118 and then flows out from the liquid outlet 104, and when the liquid passes through the impurity deposition area 118, impurities contained in the liquid are deposited in the impurity deposition area 118.

In the gas-liquid separation structure 100, the vertically extending gas branch flow path 106 and the vertically extending liquid branch flow path 107 are beneficial to the first separation of gas and liquid; the flow channel in the separation cavity 101 has a turn of 90-180 degrees on the whole and also has larger height drop, which is beneficial to further separation of gas and liquid; the arrangement of the liquid collecting region 114, the third partition plate 115 and the second gas outlet 105 further improves the gas-liquid separation effect, so that the gas-liquid separation structure 100 has a good gas-liquid separation effect.

As shown in fig. 2 and fig. 3, an embodiment of the present invention provides a heat exchanger 200, which includes a heat exchanger main body, wherein the heat exchanger main body includes an inlet collecting pipe 201, an outlet collecting pipe 202, and a plurality of refrigerant heat exchanging flow paths 206 arranged in parallel and communicating the inlet collecting pipe 201 and the outlet collecting pipe 202. The heat exchanger 200 further includes the gas-liquid separation structure 100, a liquid outlet 104 of the gas-liquid separation structure 100 is communicated with the inlet header, and a first gas outlet 103 of the gas-liquid separation structure 100 is communicated with the outlet header 202 through a gaseous refrigerant flow path 204.

The heat exchanger 200 is a heat exchanger under an evaporation condition, and a gas-liquid separation structure 100 is added in front of an inlet collecting pipe 201. The gas-liquid separation structure 100 may be disposed at a lower left corner of the heat exchanger 200. Because the flow channel in the gas-liquid separation structure 100 has a turn of 90-180 degrees on the whole and a large height drop, after the gas-liquid two-phase refrigerant enters the separation cavity 101 from the inlet 102, the gaseous refrigerant flows to a high position along the gas branch flow path 106, flows out from the first gas outlet 103 after passing through the liquid collection region 114, and finally flows to the outlet collecting pipe 202 through the gaseous refrigerant flow path 204; the liquid refrigerant flows to the lower part along the liquid branch flow path 107, passes through the impurity deposition region 118, and then flows into the inlet collecting pipe 201 from the liquid outlet 104.

The gas-liquid separation structure 100 is disposed in front of the inlet collecting pipe 201 of the heat exchanger 200, so that gas-liquid separation of two-phase refrigerants can be achieved, the separated liquid refrigerant firstly enters the inlet collecting pipe 201, exchanges heat through the refrigerant heat exchange flow path 206 and then flows to the outlet collecting pipe 202, and the separated gaseous refrigerant does not pass through the refrigerant heat exchange flow path 206 but flows to the outlet collecting pipe 202 through the gaseous refrigerant flow path 204.

After the liquid refrigerant enters the refrigerant heat exchange flow path 206 through the inlet collecting pipe 201, the liquid refrigerant can be uniformly distributed among the plurality of refrigerant heat exchange flow paths 206, and the heat exchange efficiency of the heat exchanger 200 is improved. The gas-liquid separation structure 100 is favorable for uniform distribution of single-phase liquid refrigerant in the inlet collecting pipe 201 and the plurality of refrigerant heat exchange flow paths 206, and the performance of the heat exchanger 200 is improved.

The impurity deposition area 118 of the gas-liquid separation structure 100 can deposit impurities in the refrigerant to a certain extent during the refrigeration cycle of the air conditioner, thereby reducing the risk of blockage of the heat exchanger 200.

In some exemplary embodiments, the second gas outlet 105 of the gas-liquid separation structure 100 communicates with the gaseous refrigerant flow path 204.

Gaseous refrigerant entrained in the liquid refrigerant may flow from the second gas outlet 105 and through the gaseous refrigerant flow path 204 to the outlet header 202.

In some exemplary embodiments, as shown in fig. 2 and 3, the heat exchanger body further includes a fixing plate 203 at a side portion, and the gaseous refrigerant flow path 204 is formed in the fixing plate 203.

As shown in fig. 2 and 3, the fixing plates 203 are disposed on the left and right sides of the heat exchanger main body, the fixing plates 203 are the fixing structure of the heat exchanger 200, and a gaseous refrigerant flow path 204 is opened in the fixing plate 203 on one side (e.g., the left side) and is used as a flow channel of the gaseous refrigerant.

It should be understood that the gaseous cooling medium flow path may not be provided in the fixing plate 203, but the gaseous cooling medium flow path 204 may be separately provided to communicate the second gas outlet 103 and the second gas outlet 105 with the outlet manifold 202.

In some exemplary embodiments, the gas-liquid separation structure 100 and the heat exchanger body may be a split structure, and they are fixed by assembling; alternatively, the gas-liquid separation structure 100 and the heat exchanger body may be formed as a single-piece structure, such as by casting.

In some exemplary embodiments, as shown in fig. 4 and 5, the heat exchanger body includes a plurality of fins 205 stacked vertically in parallel, wherein the fins 205 have collecting ports opened at upper and lower ends thereof, the collecting ports at the lower ends of the plurality of fins 205 are connected to form an inlet collecting pipe 201, and the collecting ports at the lower ends are connected to form an outlet collecting pipe 202. The fin 205 is further provided with a communication channel for communicating the collecting ports at the upper and lower ends to form a refrigerant heat exchange flow path 206.

In some exemplary embodiments, as shown in fig. 4 and 5, the lower end of the fin 205 is provided with two collecting ports, and the two collecting ports are communicated with each other through a throttling groove. One current collecting port at the lower end of the plurality of fins 205 is communicated to form one inlet current collecting pipe 201, the other current collecting port at the lower end of the plurality of fins 205 is communicated to form the other inlet current collecting pipe 201, and the throttling channels on the plurality of fins form throttling channels communicated with the two inlet current collecting pipes 201.

The embodiment of the utility model provides a still provide an air conditioner, the air conditioner includes foretell heat exchanger 200.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims (17)

1. A gas-liquid separation structure is characterized by comprising a separation cavity, an inlet of gas-liquid two-phase fluid, a first gas outlet and a liquid outlet, wherein the first gas outlet is positioned on the upper side of the liquid outlet, a gas branch flow path and a liquid branch flow path are arranged in the separation cavity, the first end of the gas branch flow path is communicated with the inlet, the second end of the gas branch flow path extends upwards and is communicated with the first gas outlet, the first end of the liquid branch flow path is communicated with the inlet, and the second end of the liquid branch flow path extends downwards and is communicated with the liquid outlet.

2. The gas-liquid separation structure according to claim 1, wherein a vertically arranged first partition plate is provided in the separation chamber, the inlet is located on a first side of the first partition plate, a plate surface of the first side of the first partition plate cooperates with a chamber wall of the separation chamber to form a first chamber, the first chamber cooperates with the inlet to form a T-shaped passage, a portion of the first chamber located on an upper side of the inlet forms the gas branch flow path, a portion located on a lower side of the inlet forms the liquid branch flow path,

the first gas outlet and the liquid outlet are located on the second side of the first partition plate, a first communication gap is formed between the upper end face of the first partition plate and the top wall of the separation cavity, and a second communication gap is formed between the lower end face of the first partition plate and the bottom wall of the separation cavity.

3. The gas-liquid separation structure of claim 2, wherein the plate surface of the second side of the first partition plate and the wall of the separation chamber cooperate to form a second chamber, a second partition plate is transversely arranged in the second chamber, the second partition plate is positioned above the first gas outlet and lower than the upper end surface of the first partition plate, and a liquid collecting region is formed on the upper side of the second partition plate.

4. The gas-liquid separation structure according to claim 3, wherein an end of the second separator close to the first separator is provided with a first folded edge that is folded upward, and the first folded edge is lower than an upper end surface of the first separator.

5. The gas-liquid separation structure according to claim 4, wherein a third partition plate is provided in the second chamber, the third partition plate partitioning the second chamber into an upper gas discharge chamber and a lower liquid discharge chamber, the first gas outlet is provided on a wall of the gas discharge chamber, the liquid outlet is provided on a wall of the liquid discharge chamber,

and a return pipeline is arranged in the separation cavity, and the liquid collecting area is communicated with the liquid discharge cavity through the return pipeline.

6. The gas-liquid separation structure according to claim 5, wherein the third partition plate is an inclined plate having a flow guide function, the third partition plate is connected to a lower end of the first gas outlet, and an end of the third partition plate adjacent to the first partition plate is inclined downward and forms a flow guide gap with the first partition plate.

7. The gas-liquid separation structure according to claim 6, wherein a second gas outlet is provided on a wall of the liquid discharge chamber, the second gas outlet being located on an upper side of the liquid outlet.

8. The gas-liquid separation structure according to claim 7, wherein a fourth partition plate is provided in the liquid discharge chamber in a transverse direction, the liquid outlet is located on an upper side of the fourth partition plate, an impurity deposition region is formed on a lower side of the fourth partition plate, and the liquid collection region and the impurity deposition region are communicated through the return line.

9. The gas-liquid separation structure according to claim 8, wherein an end of the fourth separator that is close to the first separator is provided with a second flange that is bent downward.

10. The gas-liquid separation structure according to claim 7, wherein a flow cross-sectional area of the inlet is S1, a flow cross-sectional area of the gas branch flow path is S2, a flow cross-sectional area of the liquid branch flow path is S3, a flow cross-sectional area of the first communication gap is S4, a flow cross-sectional area of the second communication gap is S5, a flow cross-sectional area of the first gas outlet is S6, a flow cross-sectional area of the second gas outlet is S7, a flow cross-sectional area of the guide gap is S8, and a flow cross-sectional area of the liquid outlet is S9, wherein:

S2＝(1-1.6)S1，S3＝(1-1.6)S1，S4＝(0.9-1.45)S1，S5＝(0.9-1.45)S1，S6＝(1.2-1.6)S1，S7＝(0.15-0.2)S1，S8＝(0.1-0.15)S1，S9＝(0.7-0.85)S1。

11. the gas-liquid separation structure according to claim 8, wherein the equivalent diameter of the inlet is D1, the height of the liquid branch flow path is h1, the height of the gas branch flow path is h2, the height of the impurity deposition region is h3, the height of the liquid collection region is h4, and the height difference between the second separator and the first gas outlet is h5, wherein:

h1＝(6-10)D1，h2＝(10-12)D1，h3＝(1.2-1.4)D1，h4＝(2.5-4)D1，h5＝(5-8)D1。

12. the gas-liquid separation structure according to claim 9, wherein an angle between the third separator and the horizontal direction is 20 ° to 45 °, an angle between the first fold and the horizontal direction is 10 ° to 45 °, and an angle between the second fold and the horizontal direction is 5 ° to 30 °.

13. The gas-liquid separation structure according to any one of claims 1 to 12, wherein the inlet is higher than the liquid outlet; and/or the inlet is lower than the first gas outlet.

14. A heat exchanger comprises a heat exchanger body, wherein the heat exchanger body comprises an inlet collecting pipe, an outlet collecting pipe and a plurality of refrigerant heat exchange flow paths which are arranged in parallel and communicated with the inlet collecting pipe and the outlet collecting pipe, and the heat exchanger is characterized by further comprising a gas-liquid separation structure according to any one of claims 1 to 13, a liquid outlet of the gas-liquid separation structure is communicated with the inlet collecting pipe, and a first gas outlet of the gas-liquid separation structure is communicated with the outlet collecting pipe through a gaseous refrigerant flow path.

15. The heat exchanger of claim 14, wherein the heat exchanger body further comprises a fixing plate at a side portion, and the gaseous refrigerant flow path is formed in the fixing plate.

16. The heat exchanger according to claim 14 or 15, wherein the second gas outlet of the gas-liquid separation structure communicates with the gaseous refrigerant flow path.

17. An air conditioner characterized by comprising the heat exchanger according to any one of claims 14 to 16.

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