Air conditioner

Abstract

The utility model belongs to the technical field of air treatment, and discloses an air conditioner which comprises a heat exchanger and a lamination distributor, the lamination distributor comprises a plurality of plate bodies which are arranged in a laminated mode, and a gas-liquid separation section, an air inlet and liquid inlet section and a gas-liquid mixing section are sequentially formed in each plate body. The gas-liquid separation section comprises a gas-liquid separation cavity communicated with the refrigerant inlet; the air and liquid inlet section comprises an air inlet flow channel and a liquid inlet flow channel which vertically extend and are mutually independent; the gas inlet flow channel and the liquid inlet flow channel are respectively communicated with the gas-liquid separation section; the gas-liquid mixing section comprises a plurality of mixing flow channels, and each mixing flow channel communicates with the gas inlet flow channel and the liquid inlet flow channel; the plurality of mixing runners are correspondingly communicated with the plurality of flat pipes respectively; gas-liquid separation of gas-liquid two-phase refrigerants is completed in the gas-liquid separation cavity under the action of gravity, the gas-phase refrigerants flow into the gas inlet flow channel, the liquid-phase refrigerants flow into the liquid inlet flow channel, and the gas-phase refrigerants in the gas inlet flow channel and the liquid-phase refrigerants in the liquid inlet flow channel sequentially flow into the mixing flow channels correspondingly and are mixed in the mixing flow channels. And the mixed refrigerant flows into the flat pipe. According to the laminated distributor, gas-phase and liquid-phase refrigerants are separated through the density difference of the gas-phase refrigerants and the liquid-phase refrigerants, then the liquid-phase refrigerants and the gas-phase refrigerants are distributed among the different flat pipes along the corresponding flow channels, the liquid-phase refrigerants and the gas-phase refrigerants are evenly mixed in front of the flat pipes and then flow into the flat pipes, the distribution problem of the two-phase refrigerants is changed into simple single-phase refrigerant distribution, and the distribution efficiency of the two-phase refrigerants is improved. And the uniformity of the refrigerant in the flat tube is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air treatment, in particular to an air conditioner. Background Art

[0002] In recent years, in order to reduce the amount of refrigerant in air conditioners and improve the performance of heat exchangers, the heat transfer tubes of air conditioner heat exchangers are developing towards a smaller diameter. Microchannel heat exchangers use flat porous tubes as heat transfer tubes, which are brazed with aluminum fins. The hydraulic diameter of a single hole in a flat tube is usually less than 1 mm. When the flow area of ​​the heat transfer tube is reduced, in order to suppress the increase in refrigerant pressure loss, the number of heat transfer tubes must be increased compared to traditional tube-fin heat exchangers. Since the outdoor unit heat exchanger of commercial air conditioners is very large and the height is generally more than 800 mm, according to statistics, the spacing between flat tubes is mostly between 10 and 18 mm, and the number of flat tubes in the vertical direction often exceeds 60. Whether the refrigerant can be evenly distributed between these flat tubes has become a bottleneck problem restricting the performance of microchannel heat exchangers.

[0003] The industry usually performs secondary flow splitting to distribute the refrigerant to each flat tube of the heat exchanger. The primary flow splitting is consistent with the existing tube-fin heat exchanger, which uses a combination of splitter and capillary tube, such as Figure 1 As shown, each capillary is connected to a secondary distributor.

[0004] The secondary distributor usually adopts a header distributor, such as Figure 2 As shown in the figure, the internal space of the manifold distributor is relatively large. After the refrigerant enters the inner cavity of the manifold, due to the effect of gravity, the liquid refrigerant with high density will settle in the lower part, and the gaseous refrigerant will gather in the upper part, resulting in uneven distribution of the refrigerant in the upper and lower flat tubes.

[0005] In order to improve the shortcomings of the above-mentioned collecting pipe, a partition can be added to make the refrigerant gas-liquid mixture spray upward, thereby improving the uniformity of diversion under large flow rates. For example, the Chinese patent with publication number CN110462332A uses a complex structural design to make the fluid circulate and reduce the probability of gas-liquid phase separation. This structural design and manufacturing process are very difficult, and phase separation still exists at a small flow rate, resulting in uneven distribution.

[0006] In addition, the industry also uses stacked distributors, such as the Chinese patent with publication number CN204100877U, which increases the flow rate through the narrow flow channel formed between the plates to prevent gas-liquid separation. The distributor distributes layer by layer in a one-to-two or two-to-four manner, which can achieve a better distribution effect. However, due to the bends in the flow channel, there is also a phase separation problem due to the centrifugal effect when the refrigerant passes through.

[0007] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0008] In response to the problems pointed out in the background technology, the present application provides an air conditioner, in which a stacked plate distributor in a heat exchanger first separates the gas-liquid two-phase refrigerant, and then distributes the liquid and gas refrigerants between different flat tubes along their respective flow channels. After being evenly mixed in front of the flat tubes, they flow into the flat tubes, thereby turning the difficult problem of distributing the two-phase refrigerant into a simple single-phase refrigerant distribution, thereby improving the uniformity of the refrigerant in the flat tubes.

[0009] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0010] In some embodiments of the present application, an air conditioner is provided, comprising:

[0011] A heat exchanger comprises a laminate distributor and a plurality of flat tubes, wherein the distributor is used to evenly distribute the refrigerant to the plurality of flat tubes;

[0012] The laminate distributor comprises a plurality of plate bodies arranged in a stacked manner, wherein a gas-liquid separation section, a gas-liquid inlet section, and a gas-liquid mixing section are sequentially formed in the plate bodies;

[0013] The gas-liquid separation section includes a gas-liquid separation chamber connected to the refrigerant inlet;

[0014] The air-inlet and liquid-inlet section comprises two vertically extending and mutually independent air-inlet passages and liquid-inlet passages; the air-inlet passages and liquid-inlet passages are respectively connected to the air-liquid separation section;

[0015] The gas-liquid mixing section includes a plurality of mixing flow channels, each of which is connected to the gas inlet flow channel and the liquid inlet flow channel respectively; the plurality of mixing flow channels are connected to a plurality of flat tubes respectively;

[0016] The gas-liquid two-phase refrigerant completes gas-liquid separation in the gas-liquid separation chamber under the action of gravity, the gas-phase refrigerant flows into the inlet flow channel, the liquid-phase refrigerant flows into the liquid inlet flow channel, the gas-phase refrigerant in the inlet flow channel and the liquid-phase refrigerant in the liquid inlet flow channel flow into each mixing flow channel in turn, mix in the mixing flow channel, and the mixed refrigerant flows into the flat tube.

[0017] The laminated distributor separates and then mixes the refrigerant by designing the internal flow channel, thus turning the difficult problem of two-phase refrigerant distribution into a simple single-phase refrigerant distribution, and improving the uniformity of the refrigerant in the flat tube.

[0018] In some embodiments of the present application, the gas-liquid separation section includes a first plate body, a second plate body, and a third plate body which are stacked in sequence;

[0019] The first plate is provided with a refrigerant inlet;

[0020] A gas-liquid separation channel is formed on the second plate body; the gas-liquid separation channel is closed by the first plate body and the second plate body on both sides to form a gas-liquid separation chamber;

[0021] The third plate body has an air inlet section inlet in communication with the upper part of the gas-liquid separation chamber at the upper part, and a liquid inlet section in communication with the lower part of the gas-liquid separation chamber at the lower part;

[0022] The air inlet and liquid inlet section comprises a fourth plate body, on which an air inlet channel and a liquid inlet channel are provided, the upper portion of the air inlet channel is communicated with the air inlet section inlet, and the lower portion of the liquid inlet channel is communicated with the liquid inlet section inlet;

[0023] The gas-liquid mixing section comprises a fifth plate body and an eighth plate body, wherein the fifth plate body is vertically arranged and spaced apart to form a plurality of mixing channels, one end of the mixing channel is connected to the gas inlet channel, and the other end is connected to the liquid inlet channel;

[0024] The eighth plate body is provided with a plurality of flat tube insertion openings which are arranged vertically and spaced apart from each other. The plurality of flat tube insertion openings are respectively connected to a plurality of mixing flow channels.

[0025] The laminated separator includes at least six plates, and different flow channels are designed inside the plates to achieve the effect of separating the refrigerant first and then mixing it.

[0026] In some embodiments of the present application, the gas-liquid mixing section further includes a sixth plate body, on which a plurality of collecting channels are provided, one end of the plurality of collecting channels is respectively connected to a plurality of mixing channels, and the other end is respectively connected to a plurality of flat tubes; the cross-sectional area of ​​the collecting channels is smaller than the cross-sectional area of ​​the mixing channels. Since the cross-sectional area of ​​the collecting channels on the sixth plate body is smaller, the mixing effect of the gas-liquid refrigerant can be enhanced.

[0027] In some embodiments of the present application, the collecting flow channel is a circular hole type flow channel, that is, a small hole is opened on the sixth plate body, and the small hole forms the collecting flow channel.

[0028] In some embodiments of the present application, the mixing channel is a V-shaped channel, the middle of which is the lowest point, one end of the V-shaped channel is connected to the inlet flow channel, and the other end is connected to the liquid inlet flow channel; the collecting channel is connected to the lowest point of the V-shaped channel. The liquid refrigerant and the gas refrigerant flow from the two ends of the V-shaped channel to the bottom of the V-shaped channel to mix, and the natural downward flow characteristics of the liquid refrigerant can be used to enhance the mixing effect of the gas and liquid refrigerants.

[0029] In some embodiments of the present application, the gas-liquid mixing section further includes a seventh plate body, on which a plurality of flow diversion channels are provided, and the plurality of flow diversion channels are respectively connected to a plurality of flow collecting channels, and the cross-sectional area of ​​the flow diversion channels is greater than the cross-sectional area of ​​the flow collecting channels; the plurality of flow diversion channels are respectively connected to a plurality of flat tubes. The refrigerant flows in the flow diversion channels and then enters the flat tubes uniformly, preventing the refrigerant from being ejected from the flow collecting channels directly into the middle flat tube hole facing the refrigerant, while the flat tube holes on both sides receive less flow.

[0030] In some embodiments of the present application, the cross-sectional area of ​​the flow diversion channel is equal to the cross-sectional area of ​​the flat tube, or the cross-sectional area of ​​the flow diversion channel is larger than the cross-sectional area of ​​the flat tube, so as to ensure that all the flat tube holes on the flat tube flow into the refrigerant.

[0031] In some embodiments of the present application, the gas-liquid separation flow channel has a liquid inlet area located in the upper half of the plate body, a separation area located in the lower part of the plate body, and an air outlet area extending to the upper part of the plate body; the liquid inlet area is connected to the refrigerant inlet; the volume of the separation area is larger than the volume of the liquid inlet area, and the lower part of the separation area is connected to the liquid inlet flow channel; the upper end of the air outlet area is connected to the inlet flow channel.

[0032] In some embodiments of the present application, the thickness of each plate is 2-4 mm.

[0033] In some embodiments of the present application, the various plates are fixedly connected by welding, and their structure and processing are simple, and the manufacturing cost is low.

[0034] Compared with the prior art, the advantages and positive effects of the utility model are:

[0035] In the air conditioner in the above embodiment, the laminated distributor in the heat exchanger adopts the design concept of "separating first and then mixing" for the refrigerant. The difference in density between the gaseous and liquid refrigerants is first used to separate the gas-liquid two-phase refrigerant, and then the liquid and gas refrigerants are distributed among different flat tubes along their respective flow channels. After being evenly mixed in front of the flat tubes, they flow into the flat tubes, thus turning the distribution problem of the two-phase refrigerant into a simple single-phase refrigerant distribution, thereby improving the uniformity of the refrigerant in the flat tubes.

[0036] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 The schematic diagram of the structure of the primary flow split in the air conditioner is shown;

[0039] Figure 2 A schematic diagram showing the refrigerant flow inside the secondary split manifold distributor of the air conditioner is shown;

[0040] Figure 3 shows a schematic diagram of a refrigeration system of an air conditioner according to some embodiments;

[0041] Figure 4 A schematic structural diagram of a heat exchanger in an air conditioner according to some embodiments is shown;

[0042] Figure 5 A schematic diagram of the structure of a lamination distributor in an air conditioner according to some embodiments is shown;

[0043] Figure 6 A front view of each plate of a lamination dispenser in an air conditioner according to some embodiments is shown;

[0044] Figure 7 A schematic diagram of the flow of refrigerant in a lamination distributor in an air conditioner according to some embodiments is shown;

[0045] Figure 8 A schematic diagram showing the structure of the connection between the lamination distributor and the flat tube in the air conditioner according to some embodiments is shown;

[0046] Fig. 9 Shows Figure 8 Middle DD cross-section;

[0047] Fig.10 A front view of a second plate body in a lamination dispenser of an air conditioner according to some embodiments is shown;

[0048] Description of reference numerals:

[0049] 100-flat tube;

[0050] 200-cross-row transfer pipe;

[0051] 300-collector;

[0052] 400-Layer Dispenser;

[0053] 410-first plate; 411-refrigerant inlet;

[0054] 420 - second plate; 421 - gas-liquid separation channel; 421a - liquid inlet area; 421b - separation area; 421c - gas outlet area;

[0055] 430-third plate; 431-inlet of air inlet section; 432-inlet of liquid inlet section;

[0056] 440- fourth plate; 441- air inlet passage; 442- liquid inlet passage;

[0057] 450-fifth plate; 451-mixing channel;

[0058] 460-sixth plate; 461-collecting flow channel;

[0059] 470-seventh plate; 471-dividing flow channel;

[0060] 480 - eighth plate; 481 - flat tube insertion port;

[0061] 490 - Inlet pipe. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0065] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0067] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0068] The air conditioner in the present application includes an outdoor unit and at least one indoor unit, and the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, a throttling mechanism and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat the indoor space.

[0069] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0070] The throttling mechanism expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the throttling mechanism and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0071] The outdoor unit of the air conditioner refers to a part of a refrigeration cycle including a compressor and an outdoor-side heat exchanger, the indoor unit of the air conditioner includes an indoor-side heat exchanger, and a throttling mechanism may be provided in the indoor unit or the outdoor unit.

[0072] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0073] like Figure 3-Figure 10 As shown, some embodiments of the present application provide an air conditioner.

[0074] Figure 3 This is the schematic diagram of the refrigeration system. During heating operation, the refrigerant at the inlet of the indoor heat exchanger is in a gas-liquid two-phase state after passing through the throttling mechanism, and enters the outdoor heat exchanger through the distributor to evaporate and absorb heat.

[0075] This application involves Figure 3 The outdoor heat exchanger and the indoor heat exchanger in the.

[0076] Specific as Figure 5 As shown, the heat exchanger is a microchannel heat exchanger using flat tubes 100, with two rows in total.

[0077] When used as an evaporator, the gas-liquid two-phase refrigerant with a certain dryness is divided into N paths (8 paths in this example) by a primary splitter, enters the laminate distributor 400 through the capillary tube, and is evenly distributed to the multiple flat tubes 100 of the windward side heat exchanger by the laminate distributor 400.

[0078] In addition, in some embodiments of the present application, the heat exchanger further includes a cross-row transfer tube 200 located at one end for connecting the front and rear rows of flat tubes 100, and a gas-side collecting pipe 300.

[0079] One of the purposes of the present application is to improve the structure of the heat exchanger, improve the balanced distribution of the refrigerant in the heat exchanger, improve the heat exchange effect of the heat exchanger, and thus improve the overall heat exchange effect of the air conditioner.

[0080] The present application focuses on improving the structure of the distributor in the heat exchanger to achieve uniform mixing of the gas-phase refrigerant and the liquid-phase refrigerant, thereby improving the uniformity of the refrigerant entering the flat tube 100 .

[0081] like Figure 4 As shown, the heat exchanger of the present application is equipped with multiple stack distributors 400 for use, and the multiple stack distributors 400 are independent of each other.

[0082] The appearance of a single lamination dispenser 400 is as follows: Figure 5 shown.

[0083] The laminate distributor 400 includes a plurality of stacked plates, one side of which is provided with a refrigerant inlet 411 which can be connected to an inlet pipe 490 ; the other side of the plate is connected to a plurality of flat tubes 100 .

[0084] like Figure 6 and Figure 7 As shown, a gas-liquid separation section A, a gas-liquid inlet section B, and a gas-liquid mixing section C are sequentially formed in the plate body of the stacked plate distributor 400 along the refrigerant flow direction.

[0085] The gas-liquid separation section A includes a gas-liquid separation chamber, which is communicated with the refrigerant inlet 411 .

[0086] Since the gas-phase refrigerant flows upward and the liquid-phase refrigerant flows downward, the gas-liquid two-phase refrigerant can complete gas-liquid separation in the gas-liquid separation chamber, so that the liquid-phase refrigerant is deposited at the bottom and the gas-phase refrigerant floats on the top.

[0087] The air and liquid inlet section B includes two air inlet channels 441 and a liquid inlet channel 442 extending along the height direction (vertical extension) of the stack distributor 400 .

[0088] The inlet flow channel 441 and the liquid inlet flow channel 442 are independent flow channels and are not connected.

[0089] The inlet flow channel 441 and the liquid inlet flow channel 442 are communicated with the gas-liquid separation section A respectively.

[0090] Specifically, the inlet flow channel 441 is communicated with the upper portion of the gas-liquid separation chamber, and the liquid inlet flow channel 442 is communicated with the bottom portion of the gas-liquid separation chamber.

[0091] The gas-liquid mixing section C includes a plurality of mixing channels 451 , and the plurality of mixing channels 451 are arranged at intervals along the vertical direction.

[0092] The gas-phase refrigerant entering the inlet flow channel 441 after gas-liquid separation can enter one end of each mixing flow channel 451 in sequence from top to bottom; the liquid-phase refrigerant entering the liquid inlet flow channel 442 after gas-liquid separation can enter the other end of each mixing flow channel 451 in sequence from bottom to top, and the gas-phase refrigerant and the liquid-phase refrigerant are mixed in each mixing flow channel 451.

[0093] Each mixing channel 451 is communicated with each flat tube 100 , respectively, and the mixed refrigerant flows into each flat tube 100 .

[0094] The working principle of the laminate distributor 400 of the present application is specifically as follows:

[0095] By utilizing the difference in density between the gaseous and liquid refrigerants, gas-liquid separation is completed in the gas-liquid separation chamber. The gas-phase refrigerant flows into the inlet flow channel 441, and the liquid-phase refrigerant flows into the liquid inlet flow channel 442. The gas-phase refrigerant in the inlet flow channel 441 and the liquid-phase refrigerant in the liquid inlet flow channel 442 flow into each mixing flow channel 451 in turn. The gas-phase refrigerant and the liquid-phase refrigerant are mixed in the mixing flow channel 451, and the mixed refrigerant flows into the flat tube 100.

[0096] The laminated distributor in the present application adopts a design concept of "separating first and then mixing" for the refrigerant. The difference in density between the gaseous and liquid refrigerants is first used to separate the gas-liquid two-phase refrigerant, and then the liquid and gas refrigerants are distributed among different flat tubes 100 along their respective flow channels. After being evenly mixed in front of the flat tubes 100, they flow into the flat tubes 100, thus turning the distribution problem of the two-phase refrigerant into a simple single-phase refrigerant distribution, thereby improving the uniformity of the refrigerant in the flat tubes 100.

[0097] In some embodiments of the present application, the gas-liquid separation section A includes a first plate body 410, a second plate body 420, and a third plate body 430 which are stacked in sequence.

[0098] A refrigerant inlet 411 is defined on the first plate 410 .

[0099] A gas-liquid separation channel 421 is formed on the second plate body 420 , and the gas-liquid separation channel 421 is closed by the first plate body 410 and the second plate body 420 on both sides to form a gas-liquid separation chamber.

[0100] The third plate body 430 has an air inlet section inlet 431 in communication with the upper part of the gas-liquid separation chamber at its upper part, and a liquid inlet section inlet 432 in communication with the lower part of the gas-liquid separation chamber at its lower part.

[0101] See also Fig.10 , which is a specific structure of the gas-liquid separation channel 421 in some embodiments of the present application.

[0102] The gas-liquid separation channel 421 has a liquid inlet area 421a located at the upper part of the plate body, a separation area 421b located at the lower part of the plate body, and a gas outlet area 421c extending to the upper part of the plate body.

[0103] The liquid inlet area 421 a is in communication with the refrigerant inlet 411 , and the refrigerant is injected into the gas-liquid separation chamber through the refrigerant inlet 411 .

[0104] The refrigerant inlet 411 is located at the upper part of the plate body, and can fully utilize the gravity to achieve complete separation of gas-phase refrigerant and liquid-phase refrigerant, thereby achieving a better separation effect.

[0105] The volume of the separation area 421b is larger than that of the liquid inlet area 421a. The refrigerant enters the separation area 421b from the liquid inlet area 421a. As the internal volume increases and the flow rate decreases, the liquid refrigerant can be deposited at the bottom and the gas refrigerant floats on top, completing gas-liquid separation.

[0106] The lower part of the separation area 421 b is connected to the liquid inlet section inlet 432 on the third plate body 430 , and the liquid refrigerant enters the liquid inlet channel 442 from the lower liquid inlet section inlet 432 .

[0107] The upper end of the gas outlet area 421 c is connected to the gas inlet section inlet 431 on the third plate body 430 , and the gas-phase refrigerant enters the gas inlet flow channel 441 from the upper gas inlet section inlet 431 .

[0108] The air and liquid inlet section B comprises a fourth plate body 440 , on which an air inlet channel 441 and a liquid inlet channel 442 are provided. The air inlet channel 441 and the liquid inlet channel 442 are arranged vertically and in parallel.

[0109] The upper portion of the inlet flow channel 441 is communicated with the inlet section inlet 431 , and the gas-phase refrigerant entering through the inlet section inlet 431 flows from top to bottom along the inlet flow channel 441 .

[0110] The lower portion of the liquid inlet channel 442 is communicated with the liquid inlet section inlet 432 , and the liquid-phase refrigerant entering from the liquid inlet section inlet 432 flows from bottom to top along the liquid inlet channel 442 .

[0111] The gas-liquid mixing section C includes a fifth plate body 450 and an eighth plate body 480 .

[0112] The fifth plate 450 is vertically arranged with a plurality of mixing channels 451 spaced apart from each other. One end of the mixing channel 451 is connected to the inlet channel 441, and the other end is connected to the liquid inlet channel 442. Liquid refrigerant and gas refrigerant flow into the mixing channel 451 respectively and can be mixed in the mixing channel 451.

[0113] The number of the mixing channels 451 is the same as the number of the flat tubes 100 .

[0114] A plurality of flat tube insertion openings 481 are vertically arranged and spaced apart on the eighth plate 480 , and the plurality of flat tube insertion openings 481 are respectively connected to the plurality of mixing channels 451 .

[0115] When the flat tube insertion port 481 is directly connected to the mixing channel 451 , the shape of the mixing channel 451 is consistent with the shape of the flat tube insertion port 481 , that is, a straight line.

[0116] However, in some other embodiments of the present application, the gas-liquid mixing section C may further include a sixth plate body 460 , and the sixth plate body 460 is disposed between the fifth plate body 450 and the eighth plate body 480 .

[0117] The sixth plate 460 is provided with a plurality of collecting channels 461 , one end of each of which is in communication with the plurality of mixing channels 451 , and the other end of each of which is in communication with the plurality of flat tubes 100 .

[0118] The cross-sectional area of ​​the collecting channel 461 is smaller than the cross-sectional area of ​​the mixing channel 451 .

[0119] The refrigerant mixed in the mixing channel 451 is sprayed into the flat tube 100 through the collecting channel 461 with a smaller cross-section on the sixth plate 460. Since the collecting channel 461 on the sixth plate 460 has a smaller cross-section, the mixing effect of the gas-liquid refrigerant can be enhanced.

[0120] In some embodiments of the present application, the collecting flow channel 461 is a circular hole-type flow channel, that is, a small hole is opened on the sixth plate 460 , and the small hole forms the collecting flow channel 461 .

[0121] When the sixth plate 460 is provided, that is, when the mixing channel 451 is not directly connected to the flat tube 100 , the shape of the mixing channel 451 is not limited to a straight shape.

[0122] In other embodiments of the present application, the mixing channel 451 is a V-shaped channel, the middle of which is the lowest point, one end of the V-shaped channel is connected to the inlet flow channel 441, and the other end is connected to the liquid inlet channel 442; the collecting channel 461 is connected to the lowest point of the V-shaped channel.

[0123] The liquid refrigerant and the gas refrigerant flow from both ends of the V-shaped flow channel to the bottom of the V-shaped flow channel to mix, and the natural downward flow characteristics of the liquid refrigerant can be used to enhance the mixing effect of the gas-liquid refrigerant.

[0124] In some other embodiments of the present application, the mixing channel 451 may also be an inclined straight channel or a channel of other shapes such as an arc.

[0125] In some embodiments of the present application, the gas-liquid mixing section C further includes a seventh plate 470 .

[0126] A plurality of flow-dividing channels 471 are formed on the seventh plate 470 . One ends of the plurality of flow-dividing channels 471 are respectively connected to the plurality of flow-collecting channels 461 , and the other ends thereof are respectively connected to the plurality of flat tubes 100 .

[0127] The cross-sectional area of ​​the flow-dividing channel 471 is greater than the cross-sectional area of ​​the flow-collecting channel 461 .

[0128] The flat tube 100 is inserted until it is flush with the interface between the seventh plate body 470 and the eighth plate body 480 , and is not inserted into the flow diversion channel 471 of the seventh plate body 470 .

[0129] The refrigerant flows in the branch flow channel 471 and then enters the flat tube 100 uniformly, preventing the refrigerant from being sprayed from the collecting flow channel 461 directly into the middle flat tube hole facing it, while the flat tube holes on both sides receive less flow.

[0130] The cross-sectional area of ​​the flow-dividing channel 471 is equal to or larger than the cross-sectional area of ​​the flat tube 100 , so as to ensure that the refrigerant flows into all the flat tube holes of the flat tube 100 .

[0131] In some embodiments of the present application, the thickness of each plate is 2-4 mm. The plate thickness is moderate, which can ensure the distribution effect and ensure that the overall volume of the stacked plate heat exchanger is not too large.

[0132] Each plate body is an aluminum plate, and a plurality of flow paths are formed by stamping and the like. Each plate body is fixedly connected by welding. The structure and processing are simple, and the manufacturing cost is low.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

[0134] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioner, comprising: A heat exchanger comprises a laminate distributor and a plurality of flat tubes, wherein the distributor is used to evenly distribute the refrigerant to the plurality of flat tubes; It is characterized in that The laminate distributor comprises a plurality of plate bodies arranged in a stacked manner, wherein a gas-liquid separation section, a gas-liquid inlet section, and a gas-liquid mixing section are sequentially formed in the plate bodies; The gas-liquid separation section includes a gas-liquid separation chamber connected to the refrigerant inlet; The air-inlet and liquid-inlet section comprises two vertically extending and mutually independent air-inlet passages and liquid-inlet passages; the air-inlet passages and liquid-inlet passages are respectively connected to the air-liquid separation section; The gas-liquid mixing section includes a plurality of mixing flow channels, each of which is connected to the gas inlet flow channel and the liquid inlet flow channel respectively; the plurality of mixing flow channels are connected to a plurality of flat tubes respectively; The gas-liquid two-phase refrigerant completes gas-liquid separation in the gas-liquid separation chamber under the action of gravity, the gas-phase refrigerant flows into the inlet flow channel, the liquid-phase refrigerant flows into the liquid inlet flow channel, the gas-phase refrigerant in the inlet flow channel and the liquid-phase refrigerant in the liquid inlet flow channel flow into each mixing flow channel in turn, mix in the mixing flow channel, and the mixed refrigerant flows into the flat tube.

2. The air conditioner according to claim 1, characterized in that: The gas-liquid separation section comprises a first plate body, a second plate body, and a third plate body which are stacked in sequence; The first plate is provided with a refrigerant inlet; A gas-liquid separation channel is formed on the second plate body; the gas-liquid separation channel is closed by the first plate body and the second plate body on both sides to form a gas-liquid separation chamber; The third plate body has an air inlet section inlet in communication with the upper part of the gas-liquid separation chamber at the upper part, and a liquid inlet section in communication with the lower part of the gas-liquid separation chamber at the lower part; The air inlet and liquid inlet section comprises a fourth plate body, on which an air inlet channel and a liquid inlet channel are provided, the upper portion of the air inlet channel is communicated with the air inlet section inlet, and the lower portion of the liquid inlet channel is communicated with the liquid inlet section inlet; The gas-liquid mixing section comprises a fifth plate body and an eighth plate body, wherein the fifth plate body is vertically arranged and spaced apart to form a plurality of mixing channels, one end of the mixing channel is connected to the gas inlet channel, and the other end is connected to the liquid inlet channel; The eighth plate body is provided with a plurality of flat tube insertion openings which are arranged vertically and spaced apart from each other. The plurality of flat tube insertion openings are respectively connected to a plurality of mixing flow channels.

3. The air conditioner according to claim 2, characterized in that: The gas-liquid mixing section also includes a sixth plate body, on which a plurality of collecting channels are opened, one end of the plurality of collecting channels is respectively connected to a plurality of mixing channels, and the other end is respectively connected to a plurality of flat tubes; the cross-sectional area of ​​the collecting channels is smaller than the cross-sectional area of ​​the mixing channels.

4. The air conditioner according to claim 3, characterized in that: The collecting flow channel is a circular hole type flow channel.

5. The air conditioner according to claim 4, characterized in that: The mixing channel is a V-shaped channel, the middle of which is the lowest point. One end of the V-shaped channel is connected to the air inlet channel, and the other end is connected to the liquid inlet channel. The collecting channel is connected to the lowest point of the V-shaped channel.

6. The air conditioner according to claim 3, 4 or 5, characterized in that: The gas-liquid mixing section also includes a seventh plate body, on which a plurality of branch flow channels are opened, and the plurality of branch flow channels are respectively connected to a plurality of collecting flow channels, and the cross-sectional area of ​​the branch flow channels is larger than the cross-sectional area of ​​the collecting flow channels; the plurality of branch flow channels are respectively connected to a plurality of flat tubes.

7. The air conditioner according to claim 6, characterized in that: The cross-sectional area of ​​the flow-dividing channel is greater than or equal to the cross-sectional area of ​​the flat tube.

8. The air conditioner according to claim 2, characterized in that: The gas-liquid separation flow channel has a liquid inlet area located in the upper half of the plate body, a separation area located in the lower part of the plate body, and an air outlet area extending to the upper part of the plate body; the liquid inlet area is connected to the refrigerant inlet; the volume of the separation area is larger than the volume of the liquid inlet area, the lower part of the separation area is connected to the liquid inlet flow channel; the upper end of the air outlet area is connected to the inlet flow channel.

9. The air conditioner according to claim 1, characterized in that: The thickness of each plate is 2~4mm.

10. The air conditioner according to claim 1, characterized in that: The various plates are fixedly connected by welding.

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