Liquid separator and air conditioner

Abstract

The utility model relates to the technical field of refrigeration, and discloses a liquid separator and an air conditioner. The liquid separator comprises a liquid separation head; the liquid distribution pipe is communicated with the liquid distribution head; wherein the liquid separation pipe comprises a first bent pipe section and a second bent pipe section which are communicated with each other, the bending directions of the first bent pipe section and the second bent pipe section are opposite, so that a refrigerant in the liquid separation pipe is subjected to gas-liquid two-phase separation, and the liquid-phase refrigerant flows by being attached to the pipe walls on the two sides of the liquid separation pipe. The liquid phase is separated and flows on the pipe walls on the inner side and the outer side before flowing into the liquid separation head, and the gas phase is gathered and flows in the center of the pipe, so that before the separated refrigerant enters the liquid separation head, the liquid phase wraps the gas phase and is disturbed and mixed again, the purpose of uniform liquid separation is achieved, and the capacity of the whole machine is improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, for example, to a liquid dispenser and an air conditioner. Background Art

[0002] At present, the evaporator is one of the four major parts of air conditioning compression refrigeration, and is responsible for handling the cold, hot and wet loads in the air conditioning system. The fin heat exchanger is a common evaporator, which is widely used because of its simple structure and good heat exchange. Most commercial refrigeration fin evaporators are large in size and have many flow paths, which often leads to uneven distribution of refrigerant in each flow path. The liquid distributor is an important flow distribution component in the air conditioning system. If the refrigerant is poorly distributed evenly, the flow rate of some processes in the evaporator will be too small, causing serious overheating of the process and waste of heat exchange area; at the same time, the flow rate of other processes is too large, the refrigerant is not fully evaporated, and even causes problems such as liquid inhalation and uneven frost on the surface of the heat exchanger, affecting the energy efficiency of the whole machine.

[0003] Distributors are widely used in air conditioners and have various structures: pressure drop type, centrifugal type, Venturi type, and liquid storage type. With the promotion of small-diameter heat exchangers, the structure of distributors will become more complicated. In order to ensure the uniformity of liquid distribution of the distributor, the distributor in the related technology is as follows: Figure 1 As shown, the system is generally installed vertically upward due to installation space requirements, especially for the indoor unit. The refrigerant must go through multiple turns when entering the distributor before it can enter the distributor and produce diversion.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] In the liquid separator in the related technology, when the refrigerant in the liquid separator pipe passes through the bend, the density of the liquid phase is much greater than the density of the gas phase, and the centrifugal force on the liquid phase is greater than the centrifugal force on the gas phase, making it easier for the liquid phase to gather and flow outside the bend arc, resulting in phase separation of the gas and liquid phases and stratified flow. When this stratified refrigerant flows through the straight pipe section, the gas and liquid phases cannot be remixed, and then diverted through the liquid separator, resulting in the liquid mass flow rate of the outlet arranged along the outer wall of the bend pipe being much greater than that of other outlets. The result of this uneven liquid separation leads to a decline in the overall capacity of the heat exchange system, making the overall liquid separation uniformity of the liquid separator poor.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a liquid dispenser and an air conditioner to improve the liquid dispensing uniformity of the liquid dispenser, improve the overall capacity of the heat exchange system, and improve the energy efficiency.

[0009] According to the first aspect of the embodiment of the utility model, a liquid separator is provided, which includes: a liquid separator head; a liquid separator pipe connected to the liquid separator head; wherein the liquid separator pipe includes a first curved pipe segment and a second curved pipe segment that are connected, and the bending directions of the first curved pipe segment and the second curved pipe segment are opposite, so that the gas and liquid phases of the refrigerant in the liquid separator pipe are separated, and the liquid refrigerant flows along the pipe walls on both sides of the liquid separator pipe.

[0010] In the disclosed embodiment, the liquid separator includes a curved tube group, and the refrigerant flows in the liquid separator. When the refrigerant passes through the first curved tube section, the density of the liquid refrigerant is much greater than the density of the gas refrigerant, and the centrifugal force on the liquid refrigerant is greater than the centrifugal force on the gas refrigerant, so that the liquid refrigerant gathers and flows outside the curved arc of the first curved tube section. When the refrigerant passes through the second curved tube section, part of the liquid refrigerant will gather and flow outside the curved arc of the second curved tube section under the action of centrifugal force. Since the bending directions of the first curved tube section and the second curved tube section are opposite, the refrigerant undergoes two opposite phase separations, and the liquid refrigerant separates and flows on the tube walls on both sides of the liquid separator, while the gas phase gathers and flows in the center of the liquid separator. In this way, when the refrigerant enters the liquid separator head after leaving the curved tube group, the liquid phase wraps the gas phase and disturbs and mixes again, thereby achieving the purpose of uniform liquid separation.

[0011] Optionally, the first curved pipe segment and the second curved pipe segment are sequentially arranged along the flow direction of the refrigerant in the liquid distribution pipe, wherein the radius of the first curved pipe segment is greater than or equal to the radius of the second curved pipe segment.

[0012] In the disclosed embodiment, the radius of the first curved pipe section is greater than the radius of the second curved pipe section. In this way, since the refrigerant first flows through the first curved pipe section and then flows into the second curved pipe section, the radius of the first curved pipe section is larger and the centrifugal force of the first curved pipe section is smaller. In this way, the refrigerant in the first curved pipe section flows relatively smoothly, and the flow path of the liquid refrigerant on one side of the first curved pipe section is longer and the flow rate is also higher. After flowing into the second curved pipe section through the first curved pipe section, the radius of the second curved pipe section is smaller and the centrifugal force is larger, so that part of the liquid refrigerant can be quickly separated to the tube wall on the other side. If the second curved pipe section is longer, most or all of the liquid refrigerant will accumulate on the tube wall on the other side of the liquid separator. In this way, after flowing out of the second curved pipeline, the liquid refrigerant on the tube walls on both sides of the liquid separator is unevenly distributed, thereby affecting the mixing of the gas phase and the liquid phase. The arrangement of the first curved pipe segment and the second curved pipe segment in the embodiment of the present disclosure enables liquid refrigerant to be present on both sides of the liquid distribution pipe flowing out of the second curved pipe segment, thereby facilitating the liquid refrigerant to quickly wrap the gas refrigerant and improve the mixing uniformity of the liquid refrigerant and the gas refrigerant.

[0013] Optionally, the liquid dispensing tube further includes a liquid inlet pipe, which is connected to the liquid inlet end of the first curved pipe section; wherein, the diameter of the liquid inlet pipe is d, the radius of the first curved pipe section is 5d≤R1≤7d, and / or the radius of the second curved pipe section is 3d≤R1≤5d.

[0014] In the disclosed embodiment, the radius of the first curved pipe segment and the radius of the second curved pipe segment are related to the diameter of the liquid inlet pipe. The diameter of the liquid inlet pipe affects the flow rate of the refrigerant. The radius of the first curved pipe segment and the radius of the second curved pipe segment are set according to the diameter of the liquid inlet pipe, which can ensure the degree of gas-liquid separation of the refrigerant and improve the uniformity of the flow rate of the liquid refrigerant on both side walls of the liquid separation pipe, thereby improving the mixing uniformity of the gas-liquid refrigerant.

[0015] Optionally, the center angle of the first curved pipe segment is greater than or equal to the center angle of the second curved pipe segment.

[0016] In the embodiment of the present disclosure, since the first curved pipe section is upstream, the refrigerant first flows a long distance in the first curved pipe section, so that the gas-liquid two phases are fully separated and then flow into the second curved pipe section. The length of the second curved pipe section is smaller than the length of the first curved pipe section. In this way, part of the liquid-phase refrigerant can be gathered on the other side of the liquid separatory tube, and most or all of the liquid-phase refrigerant can be prevented from gathering on the other side of the liquid separatory tube, thereby ensuring that liquid-phase refrigerant also flows on the other side of the liquid separatory tube. In this way, after the refrigerant flows out from the second outer curved pipe section, there is liquid-phase refrigerant on the side walls on both sides of the liquid separatory tube, so that the liquid-phase refrigerant can wrap the gas-phase refrigerant from both sides, so that the refrigerant is disturbed and mixed again, thereby achieving the purpose of uniform liquid separation.

[0017] Optionally, a ratio of a central angle of the first curved pipe segment to a central angle of the second curved pipe segment is 2≤a≤3.

[0018] In the disclosed embodiment, when the ratio of the center angle of the first curved pipe segment to the center angle of the second curved pipe segment is less than 2, the length of the first curved pipe segment is relatively small. Since the radius of the first curved pipe segment is larger than that of the second curved pipe segment, less liquid-phase refrigerant will be separated from the refrigerant. When the refrigerant flows into the second curved pipe segment again, most of the liquid-phase refrigerant will flow along the arc-shaped outer side wall of the second curved pipe segment, affecting the uniformity of gas-liquid mixing. When the ratio of the center angle of the first curved pipe segment to the center angle of the second curved pipe segment is greater than 3, the length of the first curved pipe segment will be too long and the length of the second curved pipe segment will be too small. As a result, after the refrigerant passes through the first curved pipe segment and the second curved pipe segment, the amount of liquid-phase refrigerant on both sides of the liquid separation tube is uneven, resulting in uneven mixing of the liquid-phase refrigerant and the gas-phase refrigerant.

[0019] Optionally, the liquid dispensing pipe further includes: a liquid outlet pipe connected between the liquid outlet of the second curved pipe section and the inlet of the liquid dispensing head; wherein the liquid outlet pipe is a straight pipe section.

[0020] In the disclosed embodiment, the liquid outlet pipe is a straight pipe section, so that the gas phase refrigerant and the liquid phase refrigerant flowing out of the second curved pipe section can be re-disturbed and mixed in the straight pipe section. It can be understood that the straight pipe section provides a mixing pipe section for the gas phase and liquid phase refrigerant separated by the curved pipe group, so that the gas phase and liquid phase refrigerant are evenly mixed before flowing into the liquid separation head.

[0021] Optionally, the length of the liquid outlet pipe is d≤L≤2d.

[0022] In the disclosed embodiment, the length of the liquid outlet pipe is related to the diameter of the liquid inlet pipe, so that the length of the liquid outlet pipe can be set according to the refrigerant flow rate of the liquid distribution pipe to ensure that the gas phase refrigerant and the liquid phase refrigerant can be mixed evenly.

[0023] Optionally, the liquid separator further includes: a first curved pipe segment and a second curved pipe segment are arranged adjacent to each other.

[0024] In the embodiment of the present disclosure, the liquid refrigerant after phase separation through the first curved pipe segment can immediately enter the second curved pipe segment to undergo phase separation in another direction, so that the liquid refrigerant flowing out through the first curved pipe segment and the second curved pipe segment can be evenly mixed with the gas refrigerant, thereby avoiding the difference in flow rates of the gas refrigerant and the liquid refrigerant due to the long distance between the first curved pipe segment and the second curved pipe segment, which affects the uniform mixing of the gas refrigerant and the liquid refrigerant.

[0025] Optionally, a liquid dispensing tube includes a plurality of curved tube groups, each curved tube group includes a first curved tube segment and a second curved tube segment; wherein the plurality of curved tube groups are sequentially arranged along the length direction of the liquid dispensing tube, or the plurality of curved tube groups are crosswise arranged.

[0026] In the disclosed embodiment, when the installation environment of the liquid distributor is complex, a plurality of curved tube groups can be arranged in the liquid distributor pipe according to the installation environment, and each curved tube group includes a first curved tube segment and a second curved tube segment, so that the liquid refrigerant in each curved tube group can flow toward the opposite sides of the liquid distributor pipe, so that the gas phase and liquid phase of the refrigerant flowing out of each curved tube group are evenly mixed.

[0027] According to a second aspect of the embodiments of the utility model, an air conditioner is provided, the air conditioner comprising a liquid dispenser as described in any one of the above embodiments.

[0028] The liquid dispenser and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0029] In the liquid separator of the disclosed embodiment, the refrigerant flows in the liquid separator pipe, and then flows into the heat exchanger through the liquid separator head. The liquid separator pipe includes a first curved pipe section and a second curved pipe section, and the bending directions of the first curved pipe section and the second curved pipe section are opposite, so that when the refrigerant flows in the liquid separator pipe, when passing through the first curved pipe section, part of the liquid phase in the refrigerant is separated and flows on the tube wall on one side of the liquid separator pipe, and when the refrigerant passes through the second curved pipe section, part of the liquid phase of the refrigerant will be separated and flows on the tube wall on the other side of the liquid separator pipe under the centrifugal action of the second curved pipe section. Through the setting of two opposite curved pipe sections, the liquid phase in the liquid separator pipe can obtain two phase separations in opposite directions, so that the liquid phase before flowing into the liquid separator head is separated and flows on the tube walls on both sides, while the gas phase gathers in the center of the tube and flows, so that before the separated refrigerant enters the liquid separator head, the liquid phase wraps the gas phase and will be disturbed and mixed again, so as to achieve the purpose of uniform liquid separation, thereby improving the capacity of the whole machine.

[0030] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0032] Figure 1 is a schematic structural diagram of a liquid dispenser in a related art provided by an embodiment of the present disclosure;

[0033] Figure 2 is a schematic structural diagram of a liquid dispenser provided in an embodiment of the present disclosure;

[0034] Figure 3 is a schematic structural diagram of a liquid dispenser provided in an embodiment of the present disclosure;

[0035] Figure 4is a structural schematic diagram of a liquid dispenser provided by an embodiment of the present disclosure from another perspective;

[0036] Figure 5 is a simulation schematic diagram of a liquid dispenser provided by an embodiment of the present disclosure;

[0037] Figure 6 is a simulation schematic diagram of a liquid dispenser of a reference solution provided by an embodiment of the present disclosure;

[0038] Figure 7 is a bar graph of gas-liquid two-phase mass flow data of a reference solution provided by an embodiment of the present disclosure;

[0039] Figure 8 It is a bar graph of gas-liquid two-phase mass flow data of a liquid separator provided by an embodiment of the present disclosure.

[0040] Reference numerals:

[0041] 100, liquid distributor; 10, liquid distributor head; 101, outlet; 20, liquid distributor pipe; 201, first curved pipe section; 202, second curved pipe section; 203, liquid inlet pipe; 204, liquid outlet pipe; 205, connecting pipe. DETAILED DESCRIPTION

[0042] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0043] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0045] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0046] Unless otherwise stated, the term "plurality" means two or more.

[0047] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0048] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0049] Phase separation principle is a physical and chemical concept, which means that binary or multi-component mixtures will separate into different phases under certain conditions. Figure 3 As shown, an embodiment of the present disclosure provides a liquid separator 100, which includes a liquid separator head 10 and a liquid separator tube 20, and the liquid separator tube 20 is connected to the liquid separator head 10; wherein the liquid separator tube 20 includes a curved tube group, and the curved tube group includes a first curved tube segment 201 and a second curved tube segment 202 that are connected, and the bending directions of the first curved tube segment 201 and the second curved tube segment 202 are opposite, so that the refrigerant in the liquid separator tube 20 is separated into gas and liquid, and the liquid-phase refrigerant flows against (fits or approaches) the tube walls on both sides of the liquid separator tube 20.

[0050] In the disclosed embodiment, the refrigerant flows into the liquid distributor head 10 through the liquid distributor pipe 20, and then flows into the heat exchanger from the liquid distributor head 10, so as to evenly distribute the refrigerant to the multiple coils of the heat exchanger. The liquid distributor pipe 20 includes a curved pipe group, and the refrigerant flows in the liquid distributor pipe 20. When the refrigerant passes through the first curved pipe section 201, the density of the liquid phase refrigerant is much greater than that of the gas phase refrigerant, and the centrifugal force on the liquid phase refrigerant is greater than that on the gas phase refrigerant, so that the liquid phase refrigerant gathers and flows outside the curved arc of the first curved pipe section 201. When the refrigerant passes through the second curved pipe section 202, the liquid refrigerant will gather and flow outside the curved arc of the second curved pipe section 202 under the action of centrifugal force. Since the bending directions of the first curved pipe section 201 and the second curved pipe section 202 are opposite, the refrigerant undergoes two opposite phase separations. The liquid refrigerant separates and flows on the tube walls on both sides of the liquid separator 20, while the gas phase gathers and flows in the center of the liquid separator 20. In this way, when entering the liquid separator head 10 after leaving the curved pipe group, the liquid phase wraps the gas phase and will be disturbed and mixed again, thereby achieving the purpose of uniform liquid separation. Compared with the problem of uneven liquid separation caused by the phase separation of the gas-liquid phase and the stratified flow caused by the refrigerant in a single turn in the prior art, the gas-liquid two-phase mixing of the refrigerant in the liquid separator 20 of the disclosed embodiment is more uniform, thereby making the gas-liquid two-phase mixing of the refrigerant flowing into the heat exchanger more uniform.

[0051] The structure of the liquid distributor 100 provided in the embodiment of the present disclosure can achieve the effect of uniform flow distribution by only modifying the structure of the liquid distributor tube 20 on the basis of the existing liquid distributor head 10, saving time and effort. There is no need to redesign the structure of the liquid distributor head 10 with a complex structure. It is easy to process and manufacture, and has an obvious effect of uniformly distributing the gas-liquid two-phase flow.

[0052] Optionally, the first curved pipe segment 201 and the second curved pipe segment 202 are arranged adjacent to each other, that is, the liquid outlet end of the first curved pipe segment 201 is directly connected to the liquid inlet end of the second curved pipe segment 202; in this way, the refrigerant after phase separation through the first curved pipe segment 201 can immediately enter the second curved pipe segment 202 to separate in another direction, so that the liquid refrigerant flowing out through the first curved pipe segment 201 and the second curved pipe segment 202 can be evenly mixed with the gas-phase refrigerant, avoiding the long distance between the first curved pipe segment 201 and the second curved pipe segment 202, and the difference in flow rate of the gas-phase refrigerant and the liquid-phase refrigerant, which affects the uniform mixing of the gas-phase refrigerant and the liquid-phase refrigerant.

[0053] Optionally, the first curved pipe segment 201 and the second curved pipe segment 202 are S-shaped.

[0054] Optionally, the first curved pipe segment 201 and the second curved pipe segment 202 are sequentially arranged along the flow direction of the refrigerant in the liquid distribution pipe 20 , wherein the radius of the first curved pipe segment 201 is greater than or equal to the radius of the second curved pipe segment 202 .

[0055] In the embodiment of the present disclosure, the radius of the first curved pipe section 201 is greater than the radius of the second curved pipe section 202. In this way, since the refrigerant first flows into the first curved pipe section 201 and then flows into the second curved pipe section 202, the radius of the first curved pipe section 201 is larger, and the centrifugal force of the first curved pipe section 201 is smaller. In this way, the refrigerant in the first curved pipe section 201 flows more smoothly, and the flow path of the liquid phase refrigerant close to the side of the first curved pipe section 201 is longer, and the flow rate is also higher. After the second curved pipe section 202, the radius of the second curved pipe section 202 is small, the centrifugal force is large, and part of the liquid-phase refrigerant can be quickly separated to the tube wall on the other side, and the refrigerant flow rate is fast, which reduces the setting size of the liquid separator 20. Moreover, if the second curved pipe section 202 is long, most or all of the liquid-phase refrigerant will be gathered on the tube wall on the other side of the liquid separator 20. In this way, after flowing out of the curved pipe group, the liquid-phase refrigerant on the tube walls on both sides of the liquid separator 20 is unevenly distributed, thereby affecting the mixing of the gas phase and the liquid phase. The setting of the first curved pipe section 201 and the second curved pipe section 202 of the embodiment of the present disclosure enables both sides of the liquid separator 20 flowing out of the second curved pipe section 202 to have liquid-phase refrigerant, which facilitates the liquid-phase refrigerant to quickly wrap the gas-phase refrigerant and improve the mixing uniformity of the liquid-phase refrigerant and the gas-phase refrigerant.

[0056] Optionally, the liquid outlet end of the first curved pipe segment 201 is directly connected to the liquid inlet end of the second curved pipe segment 202, or a buffer section is provided between the liquid outlet end of the first curved pipe segment 201 and the liquid inlet end of the second curved pipe segment 202, and the buffer section can be a shorter straight pipe segment.

[0057] Optionally, the liquid distribution pipe 20 further includes a liquid inlet pipe 203, and the liquid inlet pipe 203 is connected to the liquid inlet end of the first curved pipe section 201. In the embodiment of the present disclosure, the liquid inlet pipe 203 is used to guide the refrigerant to flow into the liquid distribution pipe 20.

[0058] Optionally, the diameter of the liquid inlet pipe 203 is d, the radius of the first curved pipe section 201 is 5d≤R1≤7d, and / or the radius of the second curved pipe section 202 is 3d≤R1≤5d.

[0059] The first curved pipe segment 201 is arc-shaped, and the radius of the first curved pipe segment 201 refers to the distance between the center of the first curved pipe segment 201 and the central axis of the first curved pipe segment 201 .

[0060] The second curved pipe segment 202 is arc-shaped, and the radius of the second curved pipe segment 202 refers to the distance between the center of the second curved pipe segment 202 and the central axis of the second curved pipe segment 202 .

[0061] In the embodiment of the present disclosure, the radius of the first curved pipe segment 201 and the radius of the second curved pipe segment 202 are related to the diameter of the liquid inlet pipe 203. The diameter of the liquid inlet pipe 203 affects the flow rate of the refrigerant. The radius of the first curved pipe segment 201 and the radius of the second curved pipe segment 202 are set according to the diameter of the liquid inlet pipe 203, and the flow rate of the liquid refrigerant on both side walls of the liquid separator 20 is improved to be uniform, which can ensure the degree of gas-liquid separation of the refrigerant and improve the mixing uniformity of the gas-liquid refrigerant.

[0062] When the radius of the first curved pipe section 201 is less than 5d, the centrifugal force of the first curved pipe section 201 is too large, which will cause the refrigerant flow rate to be too fast, so that the gas and liquid cannot be completely separated. When the radius of the first curved pipe section 201 is greater than 7d, the size of the first curved pipe section 201 is too large, which is not convenient for the installation of the liquid separation pipe 20, and the refrigerant flow rate in the first curved pipe section 201 is too slow, which affects the heat exchange effect of the heat exchanger.

[0063] Optionally, the radius R1 of the first curved pipe segment 201 may be 5d, 5.5d, 6d, 6.5d or 7d, etc. Preferably, the radius R1 of the first curved pipe segment 201 is 6d.

[0064] When the radius of the second curved pipe section 202 is less than 3d, the second curved pipe section 202 will be too short or the flow rate will be too fast, resulting in less liquid refrigerant gathering on the pipe wall, affecting the mixing of the outflowing gas and liquid phases. When the radius of the second curved pipe section 202 is greater than 5d, the size of the second curved pipe section 202 is larger, resulting in a larger size of the liquid separator 20, which is not conducive to the installation of the liquid separator 20, and will cause most or all of the liquid refrigerant to gather on the other side of the liquid separator 20, affecting the mixing of the gas phase and the liquid phase.

[0065] Optionally, the radius R2 of the second curved pipe segment 202 may be 3d, 3.5d, 4d, 4.5d or 5d, etc. Preferably, the radius R2 of the second curved pipe segment 202 is 4d.

[0066] Optionally, the center angle of the first curved tube segment 201 is greater than or equal to the center angle of the second curved tube segment 202 .

[0067] In the embodiment of the present disclosure, the central angle of the first curved pipe segment 201 is greater than or equal to the central angle of the second curved pipe segment 202, so that the length of the first curved pipe segment 201 is greater than the length of the second curved pipe segment 202. Since the first curved pipe segment 201 is upstream, the refrigerant first flows a longer distance in the first curved pipe segment 201, so that the gas-liquid two phases are fully separated and then flow into the second curved pipe segment 202. The length of the second curved pipe segment 202 is less than the length of the first curved pipe segment 201. In this way, part of the liquid-phase refrigerant can be gathered on the other side of the liquid separator 20, and most or all of the liquid-phase refrigerant can be prevented from gathering on the other side of the liquid separator 20, ensuring that there is also liquid-phase refrigerant flowing on the other side of the liquid separator 20. In this way, after the refrigerant flows out from the second outer curved pipe segment, there is liquid-phase refrigerant on the side walls on both sides of the liquid separator 20, so that the liquid-phase refrigerant can wrap the gas-phase refrigerant from both sides, so that the refrigerant is disturbed and mixed again, thereby achieving the purpose of uniform liquid separation.

[0068] Alternatively, if Figure 3 As shown, the ratio of the central angle of the first curved tube section 201 to the central angle α of the second curved tube section 202 is 2≤a≤3.

[0069] In the embodiment of the present disclosure, when the ratio of the center angle of the first curved pipe segment 201 to the center angle of the second curved pipe segment 202 is less than 2, the length of the first curved pipe segment 201 is relatively small. Since the radius of the first curved pipe segment 201 is larger than that of the second curved pipe segment 202, less liquid-phase refrigerant will be separated from the refrigerant. When the refrigerant flows into the second curved pipe segment 202 again, most of the liquid-phase refrigerant will flow along the arc-shaped outer wall of the second curved pipe segment 202, affecting the uniformity of gas-liquid mixing. When the ratio of the center angle of the first curved pipe segment 201 to the center angle of the second curved pipe segment 202 is greater than 3, the length of the first curved pipe segment 201 will be too long and the length of the second curved pipe segment 202 will be too small. As a result, after the refrigerant passes through the first curved pipe segment 201 and the second curved pipe segment 202, the amount of liquid-phase refrigerant on both sides of the liquid separator 20 is uneven, resulting in uneven mixing of the liquid-phase refrigerant and the gas-phase refrigerant.

[0070] Optionally, the ratio a of the central angle of the first curved tube segment 201 to the central angle of the second curved tube segment 202 is 2, 2.5, 2.8 or 3, etc. Preferably, the ratio a of the central angle of the first curved tube segment 201 to the central angle of the second curved tube segment 202 is 2.5.

[0071] Optionally, the liquid dispensing tube 20 further includes a liquid outlet pipe 204, and the liquid outlet pipe 204 is connected between the liquid outlet of the second curved pipe section 202 and the inlet of the liquid dispensing head 10; wherein the liquid outlet pipe 204 is a straight pipe section.

[0072] In the disclosed embodiment, the liquid outlet pipe 204 is a straight pipe section, so that the gas phase refrigerant and the liquid phase refrigerant flowing out of the second curved pipe section 202 can be re-disturbed and mixed in the straight pipe section. It can be understood that the straight pipe section provides a mixing pipe section for the gas phase and liquid phase refrigerant separated by the curved pipe group, so that the gas phase and liquid phase refrigerant are evenly mixed before flowing into the liquid separation head 10.

[0073] Optionally, the length of the liquid outlet pipe 204 is d≤L≤2d.

[0074] In the disclosed embodiment, the length of the liquid outlet pipe 204 is related to the diameter of the liquid inlet pipe 203, so that the length of the liquid outlet pipe 204 can be set according to the refrigerant flow rate of the liquid distribution pipe 20 to ensure that the gas phase refrigerant and the liquid phase refrigerant can be mixed evenly.

[0075] When the length of the liquid outlet pipe 204 is less than d, the length of the liquid outlet pipe 204 is too short, and the gas phase refrigerant and the liquid phase refrigerant are not mixed evenly. When the length of the liquid outlet pipe 204 is greater than 2d, the length of the liquid outlet pipe 204 is too long, resulting in waste of pipelines.

[0076] Optionally, the length L of the liquid outlet pipe 204 is d, 1.2d, 1.4d, 1.5d, 1.7d or 2d, etc. Preferably, the length L of the liquid outlet pipe 204 is 1.5d.

[0077] Optionally, the liquid distributor 100 also includes a connecting tube 205, which is connected between the outlet 101 of the liquid inlet tube 203 and the liquid inlet of the second curved tube section 202; wherein the connecting tube 205 and the liquid inlet tube 203 are both straight tube sections, and the connection between the connecting tube 205 and the inlet tube forms a corner.

[0078] In the disclosed embodiment, a corner is formed between the connecting pipe 205 and the liquid inlet pipe 203, so as to facilitate the installation of the liquid dispensing pipe 20, so that the liquid dispensing pipe 20 can communicate with the heat exchanger and the external components.

[0079] Optionally, the diameter of the liquid distributing tube 20 is uniformly arranged, that is, the diameter of the liquid distributing tube 20 is the same along the length direction of the liquid distributing tube 20, so that the flow velocity of the refrigerant in the liquid distributing tube 20 is more uniform, thereby improving the uniformity of gas-liquid mixing.

[0080] Optionally, a liquid dispensing tube 20 includes multiple curved tube groups, each curved tube group includes a first curved tube segment 201 and a second curved tube segment 202; wherein the multiple curved tube groups are arranged in sequence along the length direction of the liquid dispensing tube 20, or the multiple curved tube groups are arranged crosswise.

[0081] In the embodiment of the present disclosure, when the installation environment of the liquid distributor 100 is relatively complex, a plurality of curved tube groups can be provided in the liquid distributor tube 20 according to the installation environment, and each curved tube group includes a first curved tube segment 201 and a second curved tube segment 202, so that the liquid refrigerant in each curved tube group can flow toward the opposite sides of the liquid distributor tube 20, so that the gas phase and the liquid phase of the refrigerant flowing out of each curved tube group are evenly mixed.

[0082] Optionally, multiple curved tube groups can be arranged in sequence, that is, the liquid outlet end of the second curved tube segment 202 of the previous curved tube group is connected to the liquid inlet end of the first curved tube segment 201 of the next curved tube group, and the first curved tube group and the second curved tube group in each curved tube group are connected.

[0083] Optionally, multiple curved pipe groups can also be cross-arranged, that is, the first curved pipe segments 201 and the second curved pipe segments 202 of the multiple curved pipe groups can be cross-arranged. For example, multiple adjacent and connected first curved pipe segments 201 can be arranged and then the same number of second curved pipe segments 202 as the first curved pipe segments 201 and corresponding to each other can be arranged.

[0084] Optionally, when a liquid dispensing tube 20 includes a plurality of curved tube groups, the number of the first curved tube segments 201 corresponding to the plurality of curved tube groups is the same as the number of the second curved tube segments 202 and corresponds one to one.

[0085] Optionally, one curved pipe group includes an even number of curved pipe segments, that is, one curved pipe group includes a plurality of first curved pipe segments 201 and a plurality of second curved pipe segments 202, and the number of the first curved pipe segments 201 and the number of the second curved pipe segments 202 are the same and correspond one to one.

[0086] Optionally, the sizes of the first curved pipe segments 201 corresponding to the plurality of curved pipe groups may be the same or different, and similarly, the sizes of the second curved pipe segments 202 corresponding to the plurality of curved pipe groups may be the same or different. In actual use, the number of curved pipe groups may be set according to the length of the liquid dispensing tube 20 and the installation environment, and the sizes of the first curved pipe segment 201 and the second curved pipe segment 202 may also be set.

[0087] Optionally, the liquid separation head 10 includes a liquid separation plate and a plurality of outlets 101, and the plurality of outlets 101 are arranged in an annular manner along the circumference of the liquid separation plate. Figure 4 As shown, when there are six outlets 101, the six outlets 101 are numbered OUT1 to OUT6 in a counterclockwise order.

[0088] In a specific embodiment, Figure 2 and Figure 3As shown, the liquid dispensing pipe 20 includes a first curved pipe section 201 and a second curved pipe section 202, R1 = 6d, R2 = 4d, the ratio of the central angle of the first curved pipe section 201 to the central angle α of the second curved pipe section 202 is 2.5, the length of the liquid outlet pipe 204 is L = 1.5d, and the gas-liquid two-phase mass flow data of the six outlets 101 of the liquid dispensing pipe 20 are shown in Table 2, and the bar graph is shown in Figure 8 As shown in the simulation diagram, Figure 5 shown.

[0089] The structure of the liquid dispensing tube 20 of the reference solution is as follows: Figure 1 The gas-liquid two-phase mass flow data of the six outlets 101 are shown in Table 1, and the bar graph is shown in Figure 7 As shown in the simulation diagram, Figure 6 As shown:

[0090] Table 1

[0091]

[0092] Table 2

[0093] Export Name Liquid mass flow Gas phase mass flow OUT1 0.003249 0.000514 OUT2 0.003026 0.000561 OUT3 0.002702 0.000628 OUT4 0.002624 0.000735 OUT5 0.002687 0.00065 OUT6 0.002936 0.000536 Standard Deviation 2.22E-04 7.57E-05

[0094] Combining Table 1 and Table 2, from the statistical chart data of gas and liquid mass flow rates, compared with the reference scheme, the standard deviations of the liquid mass flow rate and gas mass flow rate of the optimized S-shaped liquid distributor 100 are smaller than those of the original scheme. It can also be seen from the bar chart that the distribution of the gas and liquid phases is more uniform.

[0095] The gas phase and liquid phase distribution clouds can be seen from the simulation diagram, where red represents a liquid phase volume fraction of 1 and a gas phase volume fraction of 0, and blue represents a liquid phase volume fraction of 0 and a gas phase volume fraction of 1. It can be seen that the S-shaped liquid separator 100 of the embodiment of the present disclosure is designed with two turns in opposite directions, so that the flow undergoes two phase separations in opposite directions, so that the liquid phase is separated on the inner and outer tube walls, while the gas phase gathers in the center of the tube and flows, so that when entering the liquid separation head 10 through the straight liquid outlet pipe 204 section, the liquid phase wraps the gas phase and will be disturbed and mixed again, thereby achieving the purpose of uniform liquid separation, promoting the disturbance and full mixing of the gas and liquid phases at the inlet of the liquid separation head 10, ensuring uniform liquid separation at the liquid separation head 10, and improving the system energy efficiency of the whole machine.

[0096] The embodiment of the present disclosure further provides an air conditioner, which includes the liquid dispenser 100 according to any one of the above embodiments.

[0097] The air conditioner provided in the embodiment of the present disclosure includes the liquid dispenser 100 of any one of the above embodiments, and thus has the beneficial effects of the liquid dispenser 100 of any one of the above embodiments, which will not be described in detail here.

[0098] Optionally, the air conditioner is a split air conditioner. The air conditioner may also be an integrated air conditioner, a VRF (i.e., a multi-split central air conditioner) or other suitable air conditioning equipment. In one or more embodiments, the air conditioner includes an outdoor unit (which is generally arranged in an outdoor environment) and an indoor unit (which is generally arranged indoors or in a room). Alternatively, the air conditioner may be equipped with a plurality of indoor units in parallel, such as two, three, four or other suitable number of indoor units.

[0099] Optionally, the outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, a high-pressure liquid storage device and a gas-liquid separator. The indoor unit mainly includes an indoor heat exchanger, an expansion valve and an indoor solenoid valve. The compressor has an exhaust port and an air intake port. The exhaust port of the compressor is connected to the first interface of the four-way valve through an exhaust pipe; the first interface of the four-way valve is connected to the input end of the outdoor heat exchanger; the output end of the outdoor heat exchanger is connected to the high-pressure liquid storage device, the expansion valve of the indoor unit and the indoor heat exchanger in sequence through a liquid pipe; the indoor heat exchanger is connected to the first interface of the four-way valve through a gas pipe; the fourth interface of the four-way valve is connected to the air inlet of the gas-liquid separator, and the air outlet of the gas-liquid separator is connected to the air intake port of the compressor through an air intake pipe, thereby interconnecting to form a refrigeration cycle loop allowing the refrigerant to flow therein, and the four-way valve can be used to realize the mutual conversion of the cooling mode and the heating mode of the air conditioner.

[0100] Optionally, the compressor is a screw compressor, a centrifugal compressor, a piston compressor or other suitable compressors. Further, the number of compressors can also be configured to be 1, 2 or other suitable numbers. In one or more embodiments, a high-pressure protection switch is arranged on the exhaust pipe near the exhaust port of the compressor to provide shutdown protection when the exhaust pressure of the compressor is too high.

[0101] In one or more embodiments, an oil separator is provided on the exhaust pipe, wherein the gas input end of the oil separator is connected to the exhaust port of the compressor; the gas output end of the oil separator is connected to the first interface of the four-way valve through the exhaust pipe; the return oil discharge end of the oil separator is connected to the return oil capillary, and is connected to the suction port of the compressor through a pipeline, so as to return oil to the compressor in time. In one or more embodiments, a high-pressure sensor for detecting the exhaust pressure of the compressor is also provided on the exhaust pipe, and the high-pressure sensor is located downstream of the gas output end of the oil separator. In one or more embodiments, a low-pressure sensor for detecting the suction pressure of the compressor is also provided on the suction pipe, and the low-pressure sensor is located downstream of the gas output end of the gas-liquid separator.

[0102] Optionally, the outdoor heat exchanger is a finned coil heat exchanger. An outdoor heat exchanger fan is also provided near the outdoor heat exchanger to improve the heat exchange efficiency between the outdoor heat exchanger and the outdoor air. The high-pressure liquid storage device is configured to receive the liquid refrigerant condensed by the outdoor heat exchanger to adjust the circulation amount of the refrigerant in the refrigeration cycle. A drying filter, a sight glass and a liquid pipe shut-off valve are also connected in series on the liquid pipe and downstream of the high-pressure liquid storage device. The drying filter can dry the water in the liquid refrigerant, the sight glass is used to observe the flow of the liquid refrigerant and detect the water content in the refrigerant, and the setting of the liquid pipe shut-off valve can help temporarily store the refrigerant in the refrigeration cycle on the outdoor side so as to disassemble, repair and maintain the air conditioner. In one or more embodiments, an indoor solenoid valve is also provided at the position of the liquid pipe upstream of the expansion valve to control the liquid refrigerant to flow into the indoor unit.

[0103] Optionally, the indoor heat exchanger is a fin coil heat exchanger. An indoor heat exchanger fan is provided near the indoor heat exchanger to improve the heat exchange efficiency between the indoor heat exchanger and the indoor air. In one or more embodiments, the expansion valve is a thermal expansion valve. Alternatively, the expansion valve may also be an electronic expansion valve, or other suitable expansion valves. In one or more embodiments, a gas pipe stop valve is also provided on the gas pipe to cooperate with the liquid pipe stop valve to help temporarily store the refrigerant in the refrigeration cycle on the outdoor side.

[0104] Optionally, a first liquid distributor is provided between the indoor heat exchanger and the expansion valve so as to evenly distribute the liquid refrigerant expanded by the expansion valve to each coil branch of the indoor heat exchanger. In one or more embodiments, a second liquid distributor is provided between the outdoor heat exchanger and the high-pressure liquid accumulator and positioned close to the outdoor heat exchanger so that when the air conditioner is operated in the heating mode, the liquid refrigerant can be evenly distributed to each coil branch of the outdoor heat exchanger through the second liquid distributor.

[0105] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A liquid dispenser, characterized in that: include: Dispensing head; A dispensing tube, connected to the dispensing head; The liquid separator includes a first curved pipe section and a second curved pipe section which are connected to each other. The first curved pipe section and the second curved pipe section have opposite bending directions so that the gas and liquid phases of the refrigerant in the liquid separator are separated, and the liquid phase refrigerant flows along the pipe walls on both sides of the liquid separator.

2. The liquid dispenser according to claim 1, characterized in that: The first curved pipe segment and the second curved pipe segment are sequentially arranged along the flow direction of the refrigerant in the liquid distribution pipe, wherein the radius of the first curved pipe segment is greater than or equal to the radius of the second curved pipe segment.

3. The liquid dispenser according to claim 2, characterized in that: The liquid dispensing pipe also includes a liquid inlet pipe, which is connected to the liquid inlet end of the first curved pipe section; The diameter of the liquid inlet pipe is d, the radius of the first curved pipe section is 5d≤R1≤7d, and / or the radius of the second curved pipe section is 3d≤R1≤5d.

4. The liquid dispenser according to claim 2, characterized in that: The center angle of the first curved pipe segment is greater than or equal to the center angle of the second curved pipe segment.

5. The liquid dispenser according to claim 4, characterized in that: The ratio of the central angle of the first curved pipe section to the central angle of the second curved pipe section is 2≤a≤3.

6. The liquid dispenser according to claim 3, characterized in that: The dispensing tube also includes: A liquid outlet pipe connected between the liquid outlet of the second curved pipe section and the inlet of the liquid separation head; Among them, the liquid outlet pipe is a straight pipe section.

7. The liquid dispenser according to claim 6, characterized in that: The length of the liquid outlet pipe is d≤L≤2d.

8. The liquid dispenser according to claim 1, characterized in that: Also includes: The first curved pipe section and the second curved pipe section are arranged adjacent to each other.

9. The liquid dispenser according to any one of claims 1 to 8, characterized in that: A liquid dispensing tube includes a plurality of curved tube groups, each curved tube group includes a first curved tube segment and a second curved tube segment; Wherein, a plurality of curved tube groups are arranged in sequence along the length direction of the liquid dispensing tube, or a plurality of curved tube groups are arranged crosswise.

10. An air conditioner, characterized in that: Comprising the dispenser according to any one of claims 1 to 9.

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