Gas-liquid separation structure, heat exchanger and air conditioner

Abstract

The present invention discloses a gas-liquid separation structure, a heat exchanger and an air conditioner. The gas-liquid separation structure comprises a separation chamber, an inlet for a gas-liquid two-phase fluid, a first gas outlet and a liquid outlet, wherein the first gas outlet is located on the upper side of the liquid outlet, and a gas branch flow path and a liquid branch flow path are arranged in the separation chamber, wherein the first end of the gas branch flow path is connected to the inlet, and the second end extends upward and is connected to the first gas outlet, and the first end of the liquid branch flow path is connected to the inlet, and the second end extends downward and is connected to the liquid outlet. The liquid outlet of the gas-liquid separation structure is connected to the inlet manifold of the heat exchanger, and the first gas outlet is connected to the outlet manifold of the heat exchanger through a gaseous refrigerant flow path. The technical solution provided by the present invention is that a gas-liquid separation structure is arranged in front of the inlet manifold of the heat exchanger, so that the two-phase refrigerant can be separated, and the separated liquid refrigerant can be evenly distributed among a plurality of refrigerant heat exchange flow paths, thereby improving the heat exchange efficiency of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to the field of air-conditioning equipment, and in particular to a gas-liquid separation structure, a heat exchanger and an air-conditioner. Background Art

[0002] For general heat exchangers, during evaporation operation, the inlet is a gas-liquid two-phase refrigerant, and the distribution of the two-phase refrigerant in the inlet collecting pipe is prone to unevenness, affecting the heat exchange efficiency of the heat exchanger. Summary of the invention

[0003] The main purpose of the present invention is to provide a gas-liquid separation structure, a heat exchanger and an air conditioner, aiming to solve the problem of uneven distribution of gas-liquid two-phase refrigerant in the heat exchanger.

[0004] To achieve the above-mentioned purpose, the gas-liquid separation structure proposed in an embodiment of the present invention includes a separation chamber, an inlet for gas-liquid two-phase fluid, a first gas outlet and a liquid outlet, wherein the first gas outlet is located on the upper side of the liquid outlet, and a gas branch flow path and a liquid branch flow path are provided in the separation chamber, wherein the first end of the gas branch flow path is connected to the inlet, and the second end extends upward and is connected to the first gas outlet, and the first end of the liquid branch flow path is connected to the inlet, and the second end extends downward and is connected to the liquid outlet.

[0005] An embodiment of the present invention also provides a heat exchanger, including a heat exchanger body, wherein the heat exchanger body includes an inlet collecting pipe, an outlet collecting pipe, and a plurality of parallel refrigerant heat exchange flow paths connecting the inlet collecting pipe and the outlet collecting pipe, wherein the heat exchanger also includes the above-mentioned gas-liquid separation structure, the liquid outlet of the gas-liquid separation structure is connected to the inlet collecting pipe, and the first gas outlet of the gas-liquid separation structure is connected to the outlet collecting pipe through a gaseous refrigerant flow path.

[0006] An embodiment of the present invention further provides an air conditioner, comprising the heat exchanger as described above.

[0007] In the technical solution of the embodiment of the present invention, the gas-liquid separation structure can realize gas-liquid separation. The gas-liquid separation structure is arranged in front of the inlet header pipe of the heat exchanger to separate the two-phase refrigerant. The separated liquid refrigerant can be evenly distributed among multiple refrigerant heat exchange flow paths, thereby improving the heat exchange efficiency of the heat exchanger. The separated gaseous refrigerant does not pass through the refrigerant heat exchange flow path, but flows to the outlet header pipe after passing through the gaseous refrigerant flow path. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0009] Figure 1 Schematic diagram of the flow of refrigerant to the heat exchanger in some cases;

[0010] Figure 2 Schematic diagram of the structure of a heat exchanger according to an embodiment of the present invention;

[0011] Figure 3 for Figure 2 Schematic diagram of the partial structure of the heat exchanger;

[0012] Figure 4 for Figure 2 A three-dimensional schematic diagram of the cross-sectional structure of the heat exchanger;

[0013] Figure 5 for Figure 4 Enlarged schematic diagram of the middle M structure.

[0014] Description of Figure Numbers:

[0015]

[0016]

[0017] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the position of the user in a certain posture (such as the attached Figure 2 and 3 The relative position relationship, movement status, etc. between the various components under the specific posture are shown. If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] like Figure 1 As shown, the gas-liquid two-phase refrigerant 3 flows through the input pipe 1 (the input pipe 1 is provided with an expansion valve 5) to the inlet header 2 of the heat exchanger in the evaporation condition. When flowing in the input pipe 1, the two-phase refrigerant 3 starts as a homogeneous flow, and successively undergoes the expansion stage (expansion region) A, the development stage (developing region) B in which the gaseous refrigerant 31 and the liquid refrigerant 32 are gradually separated, and the completion stage (developed region) 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, resulting in uneven distribution of the refrigerant in the inlet header 2, and then uneven distribution in multiple parallel refrigerant heat exchange flow paths 4, affecting the heat exchange efficiency of the heat exchanger.

[0024] The present invention proposes a gas-liquid separation structure, a heat exchanger and an air conditioner. The gas-liquid separation structure can separate the gaseous refrigerant and the liquid refrigerant, and then the single-phase liquid refrigerant is used to enter the heat exchanger body for heat exchange, so that the liquid refrigerant in the heat exchanger body is evenly distributed and the heat exchange efficiency of the heat exchanger is high.

[0025] Please refer to Figure 3In one 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 the upper side of the liquid outlet 104. A gas branch flow path 106 and a liquid branch flow path 107 are provided in the separation chamber 101. The first end of the gas branch flow path 106 is connected to the inlet 102, and the second end extends upward and is connected to the first gas outlet 103. The first end of the liquid branch flow path 107 is connected to the inlet 102, and the second end extends downward and is connected to the liquid outlet 104.

[0026] In the gas-liquid separation structure 100, the inlet 102, the first gas outlet 103 and the liquid outlet 104 are all connected to the separation chamber 101. The inlet 102 can be used for the gas-liquid two-phase fluid (such as gas-liquid two-phase refrigerant) to enter the separation chamber 101, and the gas-liquid two-phase fluid is separated in the separation chamber 101. The separated gas (such as gaseous refrigerant) is discharged from the first gas outlet 103, and the separated liquid (such as liquid refrigerant) is discharged from the liquid outlet 104.

[0027] The separation process of the gas-liquid two-phase fluid in the separation chamber 101 is as follows.

[0028] A gas-liquid two-phase fluid can enter the separation chamber 101 from the inlet 102, and then more gas in the two-phase fluid flows upward, so the gas flows upward along the gas branch flow path 106 extending upward, and then is discharged from the separation chamber 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, so the liquid flows downward along the liquid branch flow path 107 extending downward, and then is discharged from the separation chamber 101 through the liquid outlet 104 on the lower side of the first gas outlet 103.

[0029] By setting up a gas-liquid separation structure, the separation of gas and liquid in a gas-liquid two-phase fluid can be achieved. Figure 2 As shown, when the separation structure is used in the heat exchanger 200 in evaporation mode, the gas-liquid two-phase refrigerant entering the heat exchanger 200 can be separated, thereby avoiding uneven distribution of the refrigerant in the heat exchanger body and improving the heat exchange efficiency of the heat exchanger 200.

[0030] In some exemplary embodiments, Figure 3 As shown, a vertically arranged first baffle 108 is provided in the separation chamber 101, and the inlet 102 is located on a first side of the first baffle 108 ( Figure 3 The first partition plate 108 is disposed on the left side of the separation chamber 101 and is disposed on the chamber wall ( Figure 3 On the left side wall 1011 of the separation chamber 101, the first side surface of the first partition plate 108 ( Figure 3The left side plate surface of the first partition 108) cooperates with the cavity wall of the separation cavity 101 to form a first chamber 109, and the first chamber 109 cooperates with the inlet 102 to form a T-shaped channel. The portion of the first chamber 109 located on the upper side of the inlet 102 forms a gas branch flow path 106, and the portion located on the lower side of the inlet 102 forms a liquid branch flow path 107.

[0031] The first gas outlet 103 and the liquid outlet 104 are located on the second side of the first separator 108 ( Figure 3 The first partition plate 108 is disposed on the right side of the separation chamber 101 and is disposed on the chamber wall ( Figure 3 On the right side wall 1012 of the separation chamber 101, a first connecting gap 110 is defined between the upper end surface of the first partition plate 108 and the top wall 1013 of the separation chamber 101, and a second connecting gap 111 is defined between the lower end surface of the first partition plate 108 and the bottom wall 1014 of the separation chamber 101.

[0032] like Figure 3 As shown, the inlet 102 is arranged horizontally or substantially horizontally, the 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 is connected to the middle of the first chamber 109, so the inlet 102 and the first chamber 109 are connected to form a T-shaped channel (three-way structure). The upper part of the first chamber 109 (i.e., the part located on the upper side of the inlet 102) forms a gas branch flow path 106, and the lower part of the first chamber 109 (i.e., the part located on the lower side of the inlet 102) forms a 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.

[0033] There is a gap between the upper end surface of the first partition 108 and the top wall 1013 of the separation chamber 101, and the gap forms a first connecting gap 110, so that the gas in the gas branch flow path 106 flows to the right side of the first partition 108 through the first connecting gap 110, and flows out through the first gas outlet 103 on the right side of the first partition 108. There is a gap between the lower end surface of the first partition 108 and the bottom wall 1014 of the separation chamber 101, and the gap forms a second connecting gap 111, so that the liquid in the liquid branch flow path 107 flows to the right side of the first partition 108 through the second connecting gap 111, and flows out through the liquid outlet 104 on the right side of the first partition 108.

[0034] In some exemplary embodiments, the front and rear ends of the first partition 108 can be sealed and connected to the front and rear side walls of the separation chamber 101, there is a gap between the upper and lower ends of the first partition 108 and the top wall 1013 and the bottom wall 1014 of the separation chamber 101, and there is a gap between the left and right sides of the first partition 108 and the left side wall 1011 and the right side wall 1012 of the separation chamber 101.

[0035] The first partition plate 108 and the separation chamber 101 (or a part of the separation chamber 101 ) may be an integrated structure, or the first partition plate 108 and the separation chamber 101 may be a split assembly structure.

[0036] In some exemplary embodiments, Figure 3 As shown, the second side of the first partition 108 ( Figure 3 The right side plate surface of the first partition 108 in the middle cooperates with the cavity wall of the separation cavity 101 to form a second chamber 112. A second partition 113 is arranged transversely in the second chamber 112. The second partition 113 is located on the upper side of the first gas outlet 103 and is lower than the upper end surface of the first partition 108. A liquid collection area 114 is formed on the upper side of the second partition 113.

[0037] A second chamber 112 is formed between the first partition 108 and the right side wall 1012 of the separation chamber 101, and a second partition 113 is arranged transversely in the second chamber 112. There is a gap between the second partition 113 and the top wall 1013 of the separation chamber 101, and the gap forms a liquid collection area 114. After the gas flows to the uppermost part along the gas branch flow path 106, it is thrown to the right in the horizontal direction through the first connecting gap 110. Due to the large inertia, the liquid and impurities contained in the gas will fall into the liquid collection area 114 under the action of inertia and gravity. After the gas flows downward, it flows out from the first gas outlet 103 at the lower side of the second partition 113.

[0038] The first gas outlet 103 is disposed below the second partition plate 113 , so that the gas-liquid separation structure 100 has a compact structure and a small volume.

[0039] It should be understood that the first gas outlet 103 can also be set above the second partition 113, so that after the gas is ejected through the gas branch flow path 106 and the first connecting gap 110, the liquid and impurities mixed in the gas fall into the liquid collection area 114, and the gas flows upward and then flows out from the first gas outlet 103 on the upper side of the second partition 113.

[0040] In some exemplary embodiments, Figure 3 As shown, the end of the second partition 113 close to the first partition 108 ( Figure 3 A first folded edge 1131 bent upward is provided at the left end of the second partition 113, and the first folded edge 1131 is lower than the upper end surface of the first partition 108.

[0041] The right end of the second partition 113 is horizontally arranged, and the left end of the second partition 113 is provided with a first folded edge 1131, which is bent upward to prevent the liquid or impurities in the liquid collection area 114 from flowing out from the left side. Figure 3 The left end of the second partition 113 is lower than the upper end surface of the first partition 108 so as not to affect the liquid and impurities contained in the gas from falling to the liquid collection area 114 under the action of inertia and gravity.

[0042] In some exemplary embodiments, Figure 3 As shown, the angle α2 between the first folded edge 1131 and the horizontal direction is 10°-45°. It should be understood that the angle α2 is not limited to the above range and can be designed according to actual needs.

[0043] In some exemplary embodiments, Figure 3 As shown, a third partition 115 is provided in the second chamber 112, and the third partition 115 divides the second chamber 112 into an upper gas discharge chamber 119 and a lower liquid discharge chamber 120. The first gas outlet 103 is arranged on the cavity wall of the gas discharge chamber 119, and the liquid outlet 104 is arranged on the cavity wall of the liquid discharge chamber 120.

[0044] The third partition 115 divides the second chamber 112, and the portion of the second chamber 112 located on the upper side of the third partition 115 forms a gas discharge chamber 119, and the portion of the second chamber 112 located on the lower side of the third partition 115 forms a liquid discharge chamber 120. The provision of the third partition 115 can reduce the gas in the upper gas discharge chamber 119 from entering the liquid discharge chamber 120, prevent the separated gas from mixing with the liquid, and help improve the gas-liquid separation effect of the gas-liquid separation structure.

[0045] In some exemplary embodiments, Figure 3 As shown, a reflux pipeline (not shown in the figure) is provided in the separation chamber 101, and the liquid collection area 114 is connected with the liquid discharge chamber 120 through the reflux pipeline.

[0046] The liquid collection area 114 is located in the gas discharge chamber 119 and on the upper side of the liquid discharge chamber 120, and the liquid collection area 114 is connected to the liquid discharge chamber 120 through a reflux pipe, so that the liquid collected in the liquid collection area 114 flows into the liquid discharge chamber 120 and is discharged from the liquid outlet 104 together with the liquid in the liquid branch flow path 107.

[0047] In some exemplary embodiments, the return pipeline may include at least one semicircular pipeline, the upper end of which is connected to the liquid collection area 114, and the lower end of which is connected to the liquid discharge chamber 120. Two semicircular pipelines may be provided, and are symmetrically arranged on both sides of the liquid collection area 114 and the liquid discharge chamber 120 to achieve communication between the liquid collection area 114 and the liquid discharge chamber 120.

[0048] In some exemplary embodiments, Figure 3 As shown, the third baffle 115 is an inclined plate with a flow guiding function. The third baffle 115 is connected to the lower end of the first gas outlet 103. One end of the third baffle 115 close to the first baffle 108 ( Figure 3 The left end thereof is tilted downward and forms a guide gap 116 between the first partition plate 108 and the first partition plate 108.

[0049] The first gas outlet 103 is located on the right side wall 1012 of the separation chamber 101, the right end of the third partition 115 is connected to the lower end of the first gas outlet 103, the left end of the third partition 115 is inclined downward, and a guide gap 116 is formed between the left end of the third partition 115 and the first partition 108, so that the liquid mixed in the gas in the gas discharge chamber 119 adheres to the inclined third partition 115, and the adhered liquid can flow downward along the plate surface of the third partition 115 under the action of gravity, and finally flow into the lower liquid discharge chamber 120 through the guide gap 116, so as to be discharged from the liquid outlet 104 together with the liquid in the liquid discharge chamber 120.

[0050] In some exemplary embodiments, Figure 3 As shown, the angle α1 between the third partition plate 115 and the horizontal direction is 20°-45°. It should be understood that the angle α1 is not limited to the above range and can be designed according to actual needs.

[0051] In some exemplary embodiments, Figure 3 As shown, a second gas outlet 105 is provided on the cavity wall of the liquid discharge chamber 120 , and the second gas outlet 105 is located on the upper side of the liquid outlet 104 .

[0052] A second gas outlet 105 is provided on the right side wall of the liquid discharge chamber 120 (i.e., the right side wall 1012 of the separation chamber 101), and the liquid outlet 104 is also located on the right side wall of the liquid discharge chamber 120, and is located at the lower side of the second gas outlet 105, so that the gas entrained in the liquid flowing out of the liquid branch flow path 107 can flow out through the second gas outlet 105, thereby avoiding the entrained gas from being discharged from the liquid outlet 104 and causing the separated gas to mix with the liquid, which is beneficial to the further separation of gas and liquid.

[0053] In some exemplary embodiments, Figure 3As shown, a transversely arranged fourth partition 117 is provided in the liquid discharge chamber 120, the liquid outlet 104 is located on the upper side of the fourth partition 117, an impurity deposition area 118 is formed on the lower side of the fourth partition 117, and the liquid collection area 114 is connected to the impurity deposition area 118 through a reflux pipeline.

[0054] A fourth partition plate 117 is provided in the liquid discharge chamber 120, and a liquid outlet 104 is provided on the upper side of the fourth partition plate 117. There is a gap 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), and the gap forms an impurity deposition area 118, so that the liquid in the liquid branch flow path 107 moves downward to the lower end and is thrown to the right through the second connecting gap 111. Impurities in the liquid are deposited in the impurity deposition area 118 on the lower side under the action of inertia, and the 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.

[0055] The liquid collection area 114 in the gas discharge chamber 119 is connected to the impurity deposition area 118 through a reflux pipeline, so that the impurities in the liquid collection area 114 can flow to the impurity deposition area 118 together with the collected liquid, and finally gather in the impurity deposition area 118. The setting of the impurity deposition area 118 allows the impurities in the fluid to be deposited, thereby preventing the impurities from flowing with the liquid, thereby causing the impurities to block the flow pipeline of the liquid. When the gas-liquid separation structure 100 is used in a heat exchanger, the impurity deposition area 118 can deposit impurities in the refrigerant, thereby preventing the impurities from blocking the refrigerant heat exchange flow path 206 of the heat exchanger 200, thereby improving the performance of the heat exchanger 200 and reducing the maintenance and replacement frequency of the heat exchanger 200.

[0056] In some exemplary embodiments, Figure 3 As shown, the end of the fourth partition 117 close to the first partition 108 ( Figure 3 A second folded edge 1171 bent downward is provided at the left end of the fourth partition plate 117.

[0057] The right end of the fourth partition 117 is horizontally arranged and connected to the right side wall of the liquid discharge chamber 120 (i.e., the right side wall 1012 of the separation chamber 101). The left end of the fourth partition 117 is provided with a second folded edge 1171, and the second folded edge 1171 is bent downward. On the one hand, the setting of the second folded edge 1171 can reduce the opening area on the left side of the impurity deposition area 118, and can prevent the impurities in the impurity deposition area 118 from flowing back with the liquid and then flowing out of the impurity deposition area 118, thereby reducing the amount of impurities in the liquid; on the other hand, the second folded edge 1171 can play a guiding role, so that the liquid ejected through the second connecting gap 111 flows upward along the inclined second folded edge 1171, and flows into the liquid outlet 104 on the upper side of the fourth partition 117 along the fourth partition 117.

[0058] In some exemplary embodiments, Figure 3 As shown, the lower end of the second folded edge 1171 is lower than the lower end surface of the first partition 108 so that more liquid can be drained to the liquid outlet 104 , resulting in a better drainage effect and facilitating the liquid to flow out smoothly from the liquid outlet 104 .

[0059] In some exemplary embodiments, Figure 3 As shown, the angle α3 between the second folded edge 1171 and the horizontal direction is 5°-30°. It should be understood that the angle α3 is not limited to the above range and can be designed according to actual needs.

[0060] In some exemplary embodiments, Figure 3 As shown, the end of the bottom wall of the impurity deposition area 118 away from the first separator 108 ( Figure 3 A recessed portion 1181 is provided at the right end of the impurity deposition region 118.

[0061] A recess 1181 is provided at the right end of the bottom wall of the impurity deposition area 118 (i.e., the bottom wall 1014 of the separation chamber 101). The recess 1181 is away from the open end formed by the second folded edge 1171 on the left side of the impurity deposition area 118, so that impurities can gather in the recess 1181, thereby reducing the amount of impurities flowing out of the impurity deposition area 118 with the refluxed liquid.

[0062] In some exemplary embodiments, Figure 3 As shown, the flow cross-sectional area of ​​the inlet 102 is S1, and the flow cross-sectional area of ​​the gas branch flow path 106 is S2, wherein: S2 = (1-1.6) S1, that is, the value of S2 is in the range of 1*S1 to 1.6*S1 (the same below).

[0063] In some exemplary embodiments, the flow cross-sectional area of ​​the liquid branch flow path 107 is S3, where: S3 = (1-1.6) S1.

[0064] In some exemplary embodiments, the flow cross-sectional area of ​​the first communication gap 110 is S4, wherein: S4=(0.9-1.45)S1.

[0065] In some exemplary embodiments, the flow cross-sectional area of ​​the second communication gap 111 is S5, wherein: S5=(0.9-1.45)S1.

[0066] In some exemplary embodiments, the flow cross-sectional area of ​​the first gas outlet 103 is S6, where: S6 = (1.2-1.6) S1.

[0067] In some exemplary embodiments, the flow cross-sectional area of ​​the second gas outlet 105 is S7, wherein: S7=(0.15-0.2)S1.

[0068] In some exemplary embodiments, the flow cross-sectional area of ​​the flow guide gap 116 is S8, where: S8=(0.1-0.15)S1.

[0069] In some exemplary embodiments, the flow cross-sectional area of ​​the liquid outlet 104 is S9, wherein: S9 = (0.7-0.85) S1.

[0070] In some exemplary embodiments, the flow cross-sectional area S2 of the gas branch flow path 106 and the flow cross-sectional area S3 of the liquid branch flow path 107 may be equal.

[0071] In some exemplary embodiments, Figure 3 As shown, the equivalent diameter of the inlet 102 is D1. The relationship between the equivalent diameter D1 of the inlet 102 and the flow cross-sectional area S1 is: D1 = 2*S1 / L, where L represents the wetted perimeter, which is the contact length between the fluid and the inner wall of the inlet 102.

[0072] In some exemplary embodiments, the height of the liquid branch flow path 107 is h1, where: h1 = (6-10) D1, that is, the value of h1 is in the range of 6*D1 to 10*D1 (the same below).

[0073] In some exemplary embodiments, the height of the branch gas flow path 106 is h2, where: h2=(10-12)D1.

[0074] In some exemplary embodiments, the height of the impurity deposition region 118 is h3, where: h3=(1.2-1.4)D1.

[0075] In some exemplary embodiments, the height of the liquid collection area 114 is h4, where: h4=(2.5-4)D1.

[0076] In some exemplary embodiments, the height difference between the second partition plate 113 and the first gas outlet 103 is h5, where: h5 = (5-8) D1.

[0077] The relationship between the flow cross-sectional area and height at each location of the gas-liquid separation structure is set so that the flow channel in the separation chamber 101 generally has a 90°-180° turn and a large height difference, which is beneficial to enhancing the gas-liquid separation effect of the gas-liquid separation structure.

[0078] It should be understood that the relationship between the above-mentioned flow cross-sectional area and the height is not limited to the above-mentioned range and can be designed according to actual needs.

[0079] In some exemplary embodiments, Figure 3 As shown, the position of the inlet 102 may be higher than the liquid outlet 104 , the position of the inlet 102 may be lower than the first gas outlet 103 , and the position of the inlet 102 may be lower than the second gas outlet 105 .

[0080] 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 can be changed according to actual needs.

[0081] 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 arranged at the upper and lower parts thereof. The upper gas branch flow path 106 is for gas flow, and the lower liquid branch flow path 107 is for liquid flow. The flow channel in the separation chamber 101 generally has a 90°-180° turn and a large height difference, so that after the gas-liquid two-phase fluid enters the separation chamber 101 from the inlet 102, the gas in the gas-liquid two-phase fluid first flows to a high place along the gas branch flow path 106, and then is thrown horizontally, passes through the liquid collection area 114 and then flows out from the first gas outlet 103. When the gas passes through the liquid collection area 114, the liquid in the gas is collected in the liquid collection area 114 and finally flows to the impurity deposition area 118; the liquid in the gas-liquid two-phase fluid first flows to a low place along the liquid branch flow path 107, and then is thrown horizontally, passes through the impurity deposition area 118 and then flows out from the liquid outlet 104. When the liquid passes through the impurity deposition area 118, the impurities contained in the liquid are deposited in the impurity deposition area 118.

[0082] In the gas-liquid separation structure 100, the vertically extending gas branch flow path 106 and liquid branch flow path 107 are beneficial to the first separation of gas and liquid; the flow channel in the separation chamber 101 generally has a 90°-180° turn, and a large height difference, which is beneficial to the further separation of gas and liquid; the setting of the liquid collection area 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 effect of the gas-liquid separation structure 100 is good.

[0083] like Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a heat exchanger 200, including a heat exchanger body, the heat exchanger body including an inlet header pipe 201, an outlet header pipe 202, and a plurality of parallel refrigerant heat exchange flow paths 206 connecting the inlet header pipe 201 and the outlet header pipe 202. The heat exchanger 200 also includes the above-mentioned gas-liquid separation structure 100, the liquid outlet 104 of the gas-liquid separation structure 100 is connected to the inlet header, and the first gas outlet 103 of the gas-liquid separation structure 100 is connected to the outlet header pipe 202 through the gaseous refrigerant flow path 204.

[0084] The heat exchanger 200 is a heat exchanger in an evaporation condition, and a gas-liquid separation structure 100 is added before the inlet header pipe 201. The gas-liquid separation structure 100 can be set at the lower left corner of the heat exchanger 200. Since the flow channel in the gas-liquid separation structure 100 generally has a 90°-180° bend and a large height difference, after the gas-liquid two-phase refrigerant enters the separation chamber 101 from the inlet 102, the gaseous refrigerant first flows to a high place along the gas branch flow path 106, passes through the liquid collection area 114, and then flows out from the first gas outlet 103, and finally flows to the outlet header pipe 202 through the gaseous refrigerant flow path 204; the liquid refrigerant first flows to a low place along the liquid branch flow path 107, passes through the impurity deposition area 118, and then flows into the inlet header pipe 201 from the liquid outlet 104.

[0085] A gas-liquid separation structure 100 is arranged in front of the inlet collecting pipe 201 of the heat exchanger 200 to realize the gas-liquid separation of the two-phase refrigerant. The separated liquid refrigerant first enters the inlet collecting pipe 201, and flows to the outlet collecting pipe 202 after heat exchange through the refrigerant heat exchange path 206. The separated gaseous refrigerant does not pass through the refrigerant heat exchange path 206, but flows to the outlet collecting pipe 202 after passing through the gaseous refrigerant path 204.

[0086] After the liquid refrigerant enters the refrigerant heat exchange flow path 206 through the inlet header pipe 201, it can be evenly distributed among the multiple refrigerant heat exchange flow paths 206, thereby improving the heat exchange efficiency of the heat exchanger 200. The provision of the gas-liquid separation structure 100 is conducive to evenly distributing the single-phase liquid refrigerant in the inlet header pipe 201 and the multiple refrigerant heat exchange flow paths 206, thereby improving the performance of the heat exchanger 200.

[0087] 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 clogging of the heat exchanger 200.

[0088] In some exemplary embodiments, the second gas outlet 105 of the gas-liquid separation structure 100 is in communication with the gaseous refrigerant flow path 204 .

[0089] The gaseous refrigerant entrained in the liquid refrigerant may flow out from the second gas outlet 105 and flow to the outlet collecting pipe 202 through the gaseous refrigerant flow path 204 .

[0090] In some exemplary embodiments, Figure 2 and Figure 3 As shown, the heat exchanger body further includes a fixing plate 203 located at the side, and a gaseous refrigerant flow path 204 is formed in the fixing plate 203 .

[0091] like Figure 2 and Figure 3As shown, the left and right sides of the heat exchanger body are fixed plates 203, and the fixed plates 203 are fixed structures of the heat exchanger 200. A gas refrigerant flow path 204 can be opened in the fixed plate 203 on one side (such as the left side), and it is also used as a flow channel for the gas refrigerant.

[0092] It should be understood that the gaseous refrigerant flow path may not be disposed in the fixed plate 203 , but a separate gaseous refrigerant flow path 204 may be disposed separately to connect the first gas outlet 103 and the second gas outlet 105 with the outlet collecting pipe 202 .

[0093] In some exemplary embodiments, the gas-liquid separation structure 100 and the heat exchanger body may be split structures, and the two are fixed by assembly; or, the gas-liquid separation structure 100 and the heat exchanger body may be integrated structures, such as being formed integrally by casting.

[0094] In some exemplary embodiments, Figure 4 and Figure 5 As shown, the heat exchanger body includes a plurality of vertically parallel stacked fins 205, and the upper and lower ends of the fins 205 are provided with headers, and the headers at the lower ends of the plurality of fins 205 are connected to form an inlet header pipe 201, and the headers at the lower ends are connected to form an outlet header pipe 202. The fins 205 are also provided with a connecting channel connecting the headers at the upper and lower ends to form a refrigerant heat exchange flow path 206.

[0095] In some exemplary embodiments, Figure 4 and Figure 5 As shown, two manifolds are provided at the lower end of the fin 205, and the two manifolds are connected through a throttling groove. One manifold at the lower end of the plurality of fins 205 is connected to form an inlet manifold 201, and another manifold at the lower end of the plurality of fins 205 is connected to form another inlet manifold 201, and the throttling grooves on the plurality of fins form a throttling channel connecting the two inlet manifolds 201.

[0096] The embodiment of the present invention further provides an air conditioner, which includes the above-mentioned heat exchanger 200.

[0097] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A gas-liquid separation structure, characterized in that: The invention comprises a separation chamber, an inlet for a gas-liquid two-phase fluid, a first gas outlet and a liquid outlet, wherein the first gas outlet is located above the liquid outlet, a gas branch flow path and a liquid branch flow path are provided in the separation chamber, a first end of the gas branch flow path is communicated with the inlet, a second end of the gas branch flow path extends upward and is communicated with the first gas outlet, and a first end of the liquid branch flow path is communicated with the inlet, a second end of the liquid branch flow path extends downward and is communicated with the liquid outlet; A first partition plate arranged vertically is provided in the separation chamber, the inlet is located on a first side of the first partition plate and is arranged on a cavity wall of the separation chamber opposite to the first partition plate, a plate surface on the first side of the first partition plate cooperates with the cavity wall of the separation chamber to form a first chamber, the first chamber cooperates with the inlet to form a T-shaped channel, a portion of the first chamber located on the upper side of the inlet forms the gas branch flow path, and a portion located on the 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 and are arranged on the cavity wall of the separation cavity opposite to the first partition. A first connecting gap is provided between the upper end surface of the first partition and the top wall of the separation cavity, and a second connecting gap is provided between the lower end surface of the first partition and the bottom wall of the separation cavity.

2. The gas-liquid separation structure according to claim 1, characterized in that: The plate surface on the second side of the first partition cooperates with the cavity wall of the separation cavity to form a second chamber. A second partition arranged laterally is provided in the second chamber. The second partition is located on the upper side of the first gas outlet and is lower than the upper end surface of the first partition. The upper side of the second partition forms a liquid collection area.

3. The gas-liquid separation structure according to claim 2, characterized in that: An end of the second partition plate close to the first partition plate is provided with a first folded edge bent upward, and the first folded edge is lower than the upper end surface of the first partition plate.

4. The gas-liquid separation structure according to claim 3, characterized in that: A third partition is provided in the second chamber, and the third partition divides the second chamber into an upper gas discharge chamber and a lower liquid discharge chamber. The first gas outlet is provided on the chamber wall of the gas discharge chamber, and the liquid outlet is provided on the chamber wall of the liquid discharge chamber. A reflux pipeline is provided in the separation chamber, and the liquid collection area is communicated with the liquid discharge chamber through the reflux pipeline.

5. The gas-liquid separation structure according to claim 4, characterized in that: The third baffle is an inclined plate with a flow guiding function. The third baffle is connected to the lower end of the first gas outlet. One end of the third baffle close to the first baffle is inclined downward, and a flow guiding gap is formed between the third baffle and the first baffle.

6. The gas-liquid separation structure according to claim 5, characterized in that: A second gas outlet is provided on the cavity wall of the liquid discharge chamber, and the second gas outlet is located on the upper side of the liquid outlet.

7. The gas-liquid separation structure according to claim 6, characterized in that: A transversely arranged fourth partition is provided in the liquid discharge chamber, the liquid outlet is located on the upper side of the fourth partition, an impurity deposition area is formed on the lower side of the fourth partition, and the liquid collection area is connected with the impurity deposition area through the reflux pipeline.

8. The gas-liquid separation structure according to claim 7, characterized in that: The fourth partition plate has an end close to the first partition plate provided with a second folded edge bent downward.

9. The gas-liquid separation structure according to claim 6, characterized in that: The flow cross-sectional area of ​​the inlet is S1, the flow cross-sectional area of ​​the gas branch flow path is S2, the flow cross-sectional area of ​​the liquid branch flow path is S3, the flow cross-sectional area of ​​the first connecting gap is S4, the flow cross-sectional area of ​​the second connecting gap is S5, the flow cross-sectional area of ​​the first gas outlet is S6, the flow cross-sectional area of ​​the second gas outlet is S7, the flow cross-sectional area of ​​the guide gap is S8, and the 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.

10. The gas-liquid separation structure according to claim 7, characterized in that: 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 area is h3, the height of the liquid collection area is h4, and the height difference between the second partition 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.

11. The gas-liquid separation structure according to claim 8, characterized in that: The angle between the third partition and the horizontal direction is 20°-45°, the angle between the first folded edge and the horizontal direction is 10°-45°, and the angle between the second folded edge and the horizontal direction is 5°-30°.

12. The gas-liquid separation structure according to any one of claims 1 to 11, characterized in that: The inlet is higher than the liquid outlet; and / or, the inlet is lower than the first gas outlet.

13. A heat exchanger, comprising a heat exchanger body, wherein the heat exchanger body comprises an inlet header pipe, an outlet header pipe, and a plurality of parallel refrigerant heat exchange flow paths connecting the inlet header pipe and the outlet header pipe, wherein: The heat exchanger also includes a gas-liquid separation structure as described in any one of claims 1 to 12, wherein the liquid outlet of the gas-liquid separation structure is connected to the inlet collecting pipe, and the first gas outlet of the gas-liquid separation structure is connected to the outlet collecting pipe through a gaseous refrigerant flow path.

14. The heat exchanger according to claim 13, characterized in that The heat exchanger body further includes a fixing plate located at a side portion, and the gaseous refrigerant flow path is formed in the fixing plate.

15. The heat exchanger according to claim 13 or 14, characterized in that: The second gas outlet of the gas-liquid separation structure is in communication with the gaseous refrigerant flow path.

16. An air conditioner, characterized in that: Comprising a heat exchanger as claimed in any one of claims 13 to 15.

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