An air conditioner

Abstract

An air conditioner, the heat exchanger provided therein includes a distributor (10), and the distributor (10) is used to evenly distribute the gas-liquid two-phase refrigerant into a plurality of flat tubes (40). A mixing chamber (100), a reflux chamber (200), and a plurality of shunt sections (400) are formed in the distributor (10). The gas-liquid two-phase refrigerant input by the refrigerant pipeline (60) flows in the mixing chamber (100). The reflux chamber (200) is communicated with the mixing chamber (100), and a part of the refrigerant in the mixing chamber (100) can flow back to the mixing chamber (100) through the reflux chamber (200). The plurality of shunt sections (100) are in one-to-one correspondence and communication with the plurality of flat tubes (40). The inlets of the plurality of shunt sections (400) communicated with the plurality of flat tubes (40) arranged lower are communicated with the mixing chamber (100), and the inlets of the plurality of shunt sections (400) communicated with the plurality of flat tubes (40) arranged upper are communicated with the reflux chamber (200). The above structure can improve the balanced distribution of the refrigerant in the heat exchanger and improve the heat exchange effect of the heat exchanger.

Description

[0001] This application claims the priority of a Chinese patent application with the application number 202010843452.1 and the invention title of "An air conditioner", which was filed with the Chinese Patent Office on August 20, 2020. The entire content of which is incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of refrigeration equipment, and particularly to an air conditioner with uniform refrigerant distribution. Background Art

[0003] Currently, heat pump type air conditioners are a commonly used type of air conditioner for heating and cooling. In summer for refrigeration, the air conditioner cools the indoor air and dissipates heat outdoors. While in winter for heating, the direction is opposite to that in summer, i.e., it heats the indoor air and cools the outdoor air. The air conditioner conducts heat exchange between different environments through a heat pump. For example, in winter, outdoor air, surface water, groundwater, etc. are low-temperature heat sources, while indoor air is a high-temperature heat source. The function of a heat pump type air conditioner for heating is to transfer the heat from the outdoor environment to the indoor environment. Summary of the Invention

[0004] This application provides an air conditioner, including:

[0005] A heat exchange circuit for performing heat exchange between indoor and outdoor. An exchanger is provided on the heat exchange circuit, and the exchanger includes:

[0006] A plurality of flat tubes through which refrigerant flows, and the plurality of flat tubes are arranged at intervals in the vertical direction in sequence;

[0007] A distributor for uniformly distributing the gas-liquid two-phase refrigerant into the plurality of flat tubes. A mixing chamber is formed in the distributor, in which the gas-liquid two-phase refrigerant input from the refrigeration pipeline flows;

[0008] A return chamber communicating with the mixing chamber, and a part of the refrigerant in the mixing chamber can flow back to the mixing chamber through the return chamber;

[0009] A plurality of shunt sections, which are in one-to-one correspondence and communication with the plurality of flat tubes. The inlets of the plurality of shunt sections communicating with the plurality of flat tubes arranged at the lower part are in communication with the mixing chamber, and the inlets of the plurality of shunt sections communicating with the plurality of flat tubes arranged at the upper part are in communication with the return chamber.

[0010] Description of the Drawings

[0011] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic diagram of the principle of an air conditioner;

[0013] Figure 2 It is a schematic structural diagram of a heat exchanger according to some embodiments of the present application;

[0014] Figure 3 It is a schematic structural diagram of a distributor according to some embodiments of the present application;

[0015] Figure 4 It is Figure 3 A schematic diagram after making the outer wall transparent for the structure shown;

[0016] Figure 5 It is Figure 4 A schematic diagram observed from the Q direction;

[0017] Figure 6 It is Figure 3 A sectional view taken along the A-A direction in

[0018] Figure 7 It is Figure 6 An enlarged view of part C in

[0019] Figure 8 It is Figure 3 A sectional view taken along the B-B direction in

[0020] Figure 9 It is Figure 8 An enlarged view of part D in

[0021] Figure 10 It is a schematic sectional view of a mixing chamber, a reflux chamber, and a partition part according to some embodiments of the present application;

[0022] Figure 11 It is a schematic diagram of the refrigerant cycle of a mixing chamber, a reflux chamber, and a partition part according to some embodiments of the present application. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0024] The air conditioner in some embodiments of the present application includes a heat exchange circuit for performing heat exchange between indoors and outdoors to achieve the adjustment of the indoor temperature by the air conditioner.

[0025] Referring to Figure 1 As shown, a schematic diagram of the heating cycle of a heat pump is shown. The heat pump includes: an evaporator 1, a compressor 2, a condenser 3, an expansion valve 4, and a four-way reversing valve 5. The specific working process of the heat pump for heating is as follows: First, the low-pressure two-phase refrigerant (a mixture of liquid refrigerant and gaseous refrigerant) in the evaporator 1 absorbs heat from the low-temperature environment; after being sucked by the compressor 2, it is compressed into a high-temperature and high-pressure gaseous refrigerant; then, the high-temperature and high-pressure gaseous refrigerant releases heat energy to the indoor environment in the condenser 3 while its own temperature decreases; finally, it passes through the expansion valve mechanism 4 for throttling and becomes a low-temperature and low-pressure two-phase refrigerant, and then enters the evaporator 1 again to repeat the above-mentioned heating process of the cycle.

[0026] The heat pump air conditioner changes the operating mode through the four-way reversing valve 5. In the summer refrigeration mode, the indoor heat exchanger serves as the evaporator 1, and the outdoor heat exchanger serves as the condenser 3. The indoor air is cooled by passing through the surface of the evaporator 1 to achieve the purpose of lowering the indoor temperature, and the heat is transported outdoors through the condenser 3. When heating in winter, the position of the valve block of the four-way reversing valve 5 is switched to change the flow direction of the refrigerant. At this time, the refrigerant absorbs heat from the environment through the outdoor heat exchanger and releases heat to the indoor environment to achieve the purpose of heating.

[0027] The evaporator 1 is a device that outputs cold. Its function is to evaporate the refrigerant liquid flowing in through the expansion valve 4 to absorb the heat of the object to be cooled and achieve the purpose of refrigeration. The condenser 3 is a device that outputs heat. The heat absorbed from the evaporator 1 and the heat converted from the work consumed by the compressor 2 are taken away by the cooling medium in the condenser 3 to achieve the purpose of heating. When the microchannel heat exchanger is used as an evaporator, when the gas-liquid two-phase refrigerant enters multiple flat tubes from the inner cavity of the distributor, due to the differences in density and viscosity between the gas phase and the liquid phase, the flowing refrigerant is prone to separation under the action of gravity and viscous force, resulting in uneven refrigerant entering the multiple flat tubes. Especially for the finned microchannel heat exchanger, the distributor is designed to be installed vertically or vertically inclined, making the flow splitting more difficult. The uneven refrigerant not only deteriorates the heat exchange efficiency but also causes fluctuations in the refrigeration system. Therefore, achieving uniform distribution of the two-phase refrigerant inside different flat tubes in the same process is an important issue.

[0028] In some embodiments of the present application, the heat exchange circuit may adopt Figure 1The heat exchange principle shown in the figure, that is, the heat exchange circuit includes an evaporator 1, a compressor 2, a condenser 3, an expansion valve 4, and a four-way reversing valve 5. The refrigerant phase change processes in the evaporator 1 and the condenser 3 are opposite, and the evaporator 1 and the condenser 3 are collectively referred to as the heat exchanger.

[0029] One of the purposes of this application is to improve the structure of the heat exchanger, improve the uniform 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.

[0030] [Heat exchanger]

[0031] Referring to Figure 2 and Figure 3 , in some embodiments of this application, the heat exchanger is a microchannel heat exchanger. The heat exchanger includes a plurality of flat tubes 40 arranged at equal intervals and fins 50. A plurality of microchannels for flowing the refrigerant are formed in the flat tubes 40. The fins 50 are arranged between two adjacent flat tubes 40. The air flow direction flowing through the fins 50 is perpendicular to the refrigerant flow direction flowing through the flat tubes 40. The heat / specific heat released by the refrigerant in the flat tubes 40 is taken away by the heat dissipation fins and the air flow.

[0032] The flat tubes 40 are made of porous microchannel aluminum alloy, and the fins 50 are made of aluminum alloy with a brazed composite layer on the surface, which is light in weight and high in heat exchange efficiency.

[0033] The heat exchanger further includes a diverter 20, a header 30, and a distributor 40. The refrigerant liquid entering from the diverter 20 is evenly distributed to the flat tubes 40 in the first process and then collected by the header 30. The gas-liquid two-phase refrigerant collected by the header 30 enters the flat tubes 40 in the second process through the distributor 10. In the second process, the gas-liquid two-phase refrigerant is evenly distributed to each flat tube 40 in the second process by the distributor 10 and exchanges heat through the fins 50. The refrigerant in the flat tubes 40 in the second process becomes gaseous refrigerant after heat exchange, and the gaseous refrigerant is discharged through the gas pipe 70.

[0034] [Distributor]

[0035] This application focuses on improving the structure of the distributor 10 in the heat exchanger to improve the uniformity of the refrigerant entering the flat tubes 40 in the second process.

[0036] Referring to Figures 4 to 11 , a mixing chamber 100, a reflux chamber 200, and a plurality of shunt sections 400 are formed in the distributor 10.

[0037] The mixing chamber 100 is communicated with the external refrigeration pipeline 60, and the gas-liquid two-phase refrigerant in the refrigeration pipeline 60 flows into the mixing chamber 100.

[0038] The reflux chamber 200 is in communication with the mixing chamber 100, and part of the refrigerant in the mixing chamber 100 can flow back to the mixing chamber 100 through the reflux chamber 200.

[0039] A plurality of shunt sections 400 are in one-to-one correspondence and communication with a plurality of flat tubes 40 in the second process.

[0040] The plurality of flat tubes 40 are arranged at intervals in the vertical direction. The inlets of the plurality of shunt sections 400 communicated with the flat tubes 40 arranged at the lower part are in communication with the mixing chamber 100, and the inlets of the plurality of shunt sections 400 communicated with the flat tubes 40 arranged at the upper part are in communication with the reflux chamber 200.

[0041] In some embodiments of the present application, the number of flat tubes that the distributor 10 can carry is 2 - 100. For the convenience of description, 7 flat tubes are taken as an example for elaboration in the following text and related drawings.

[0042] Refer to Figure 3 , the 7 flat tubes are sequentially marked as the first flat tube 41, the second flat tube 42, the third flat tube 43, the fourth flat tube 44, the fifth flat tube 45, the sixth flat tube 46, and the seventh flat tube 47.

[0043] In the vertical direction, the first flat tube 41 to the seventh flat tube 47 are sequentially arranged at intervals upward, with the first flat tube 41 at the lowest position and the seventh flat tube 47 at the highest position.

[0044] Refer to Figure 4 and Figure 5 , the shunt sections 400 corresponding to the 7 flat tubes are sequentially marked as the first shunt section 401, the second shunt section 402, the third shunt section 403, the fourth shunt section 404, the fifth shunt section 405, the sixth shunt section 406, and the seventh shunt section 407.

[0045] In some embodiments of the present application, the first shunt section 401 to the third shunt section 403 communicated with the first flat tube 41 to the third flat tube 43 arranged at the lower part are in communication with the mixing chamber 100, and the fourth shunt section 404 to the seventh shunt section 407 communicated with the fourth flat tube 44 to the seventh flat tube 47 arranged at the upper part are in communication with the reflux chamber 200.

[0046] The distributor 10 adopts a reflux method to impact, mix, and circulate the gas-liquid two-phase refrigerant in the mixing chamber 100, avoiding the phenomenon of gas-liquid separation.

[0047] Specifically, when the gas-liquid two-phase refrigerant evaporates in the heat exchanger, part of the gas-liquid two-phase refrigerant input into the mixing chamber 100 from the refrigeration pipeline 60 directly flows upward into the first shunt section 401 to the third shunt section 403, and then enters the first flat tube 41 to the third flat tube 43 at the lower position; the other part flows back into the reflux chamber 200.

[0048] For the gas-liquid two-phase refrigerant in the reflux chamber 200, a part of it directly flows upward into the fourth to seventh shunt sections 404 to 407, and then enters the fourth to seventh flat tubes 44 to 47 at a high position; another part flows back into the mixing chamber 100, and this part of the refrigerant impacts the refrigerant in the mixing chamber 100, mixes with the refrigerant in the mixing chamber 100, promotes the uniform mixing of the gas-liquid two-phase refrigerant in the mixing chamber 100, prevents the occurrence of gas-liquid separation, and enables the refrigerant entering each shunt section 400 and flat tube 40 to be a uniformly mixed gas-liquid refrigerant.

[0049] During the process of transporting the uniformly mixed gas-liquid two-phase refrigerant in the mixing chamber 100 and the reflux chamber 200 to the corresponding flat tubes 40 through the shunt sections 400, for the gas-liquid two-phase refrigerant in different shunt sections 400, the higher the height of the shunt section 400, the greater the flow resistance of the refrigerant (mainly referring to the liquid refrigerant) in the shunt section 400 affected by gravity.

[0050] That is to say, during the upward flow of the liquid refrigerant along the shunt section 400, the flow rate of the liquid refrigerant will gradually decrease under the influence of gravity. This will result in different flow rates of the liquid refrigerant entering different flat tubes 40 for the same flow rate of uniformly mixed gas-liquid two-phase refrigerant entering different shunt sections 400 under the influence of gravity. The flow rate of the liquid refrigerant entering the flat tubes 40 at a lower position is greater than that of the liquid refrigerant entering the flat tubes 40 at a higher position. Since the heat exchange of the heat exchanger mainly relies on the liquid refrigerant, this will ultimately still lead to non-uniform heat exchange of the heat exchanger.

[0051] To solve and avoid the occurrence of the above situation, based on the above-mentioned reflux method, the distributor 10 adopts different flow channels (referring to the mixing chamber 100 and the reflux chamber 200) according to the different flow resistances of the refrigerant (mainly referring to the liquid refrigerant) in the shunt sections 400 connected to the flat tubes 40 at different height positions, so as to eliminate the resistance influence of gravity on the upward flow of the liquid refrigerant along the shunt section 400 and ensure the consistency of the refrigerant flow rates entering the flat tubes 40 at different height positions.

[0052] Specifically: Since the flow rate of the gas-liquid two-phase refrigerant input into the mixing chamber 100 by the refrigeration pipeline 60 is relatively fast, the flow rate of the gas-liquid two-phase refrigerant in the mixing chamber 100 is smaller than that of the gas-liquid two-phase refrigerant in the reflux chamber 200.

[0053] A plurality of flow dividing sections 400 (a first flow dividing section 401 to a third flow dividing section 403) communicating with a plurality of lower flat tubes 40 (a first flat tube 41 to a third flat tube 43) are communicated with a mixing chamber 100, and a plurality of flow dividing sections 400 (a fourth flow dividing section 404 to a seventh flow dividing section 407) communicating with a plurality of upper flat tubes 40 (a fourth flat tube 44 to a seventh flat tube 47) are communicated with a reflux chamber 200.

[0054] Then, when the gas-liquid two-phase refrigerant in the mixing chamber 100 and the reflux chamber 200 is evenly mixed, the flow rate of the gas-liquid two-phase refrigerant entering the first flow dividing section 401 to the third flow dividing section 403 is less than the flow rate of the gas-liquid two-phase refrigerant entering the fourth flow dividing section 404 to the seventh flow dividing section 407. Since the height of the first flow dividing section 401 to the third flow dividing section 403 is less than the height of the fourth flow dividing section 404 to the seventh flow dividing section 407, affected by gravity, the flow rate of the liquid refrigerant finally entering the first flat tube 41 to the seventh flat tube 47 is the same.

[0055] Figure 4 and Figure 5 For Figure 3 is a schematic diagram after the outer wall of the shown distributor 10 is made transparent. Figure 6 and Figure 8 For Figure 3 is a schematic cross-sectional view of the shown distributor 10 at different positions, to clearly and intuitively show the structures of the mixing chamber 100, the reflux chamber 200, and the flow dividing section 400.

[0056] In some embodiments of the present application, referring to Figures 9 to 11 , the mixing chamber 100 and the reflux chamber 200 are separated by a partition plate 300, and the partition plate 300 is provided with a first through port 310 and a second through port 320.

[0057] The refrigerant in the mixing chamber 100 can flow into the reflux chamber 200 through the first through port 310, and the refrigerant in the reflux chamber 200 can flow into the mixing chamber 100 through the second through port 320, thus forming a circulating flow of the refrigerant between the mixing chamber 100 and the reflux chamber 200.

[0058] In some embodiments of the present application, the area of the second through port 320 is smaller than the area of the first through port 310, so that the refrigerant flowing from the second through port 320 to the mixing chamber 100 is accelerated, enhancing the impact on the refrigerant in the mixing chamber 100 and improving the mixing uniformity effect.

[0059] In some embodiments of the present application, the bottom of the first through port 310 is flush with the bottom of the second through hole 320, which helps to improve the reflux effect of the refrigerant.

[0060] In some embodiments of the present application, the mixing chamber 100 and the reflux chamber 200 are cavity structures symmetrically arranged with respect to the partition plate 300. The mixing chamber 100 has a first top wall 510, and the reflux chamber 200 has a second top wall 520. Both the first top wall 510 and the second top wall 520 slope downward from the top end of the partition plate 300.

[0061] In some embodiments of the present application, referring to Figure 7 and Figure 11 , a refrigerant inlet 110 is provided on the side wall of the mixing chamber 100, and the refrigeration pipeline 60 is communicated with the refrigerant inlet 110.

[0062] The axis of the refrigerant inlet 110 and the axis of the second through port 320 are on the same horizontal plane, and the direction in which the refrigerant flows into the mixing chamber 100 from the refrigerant inlet 110 is perpendicular to the direction in which the refrigerant flows into the mixing chamber 100 from the second through port 320.

[0063] In this way, the refrigerant flowing into the mixing chamber 100 from the second through port 320 has a jet impact effect on the refrigerant flowing into the mixing chamber 100 from the refrigerant inlet 110 to the greatest extent, which helps to further improve the mixing uniformity of the refrigerant.

[0064] In some embodiments of the present application, referring to Figure 7 and Figure 9 , the cavity surrounded by the mixing chamber 100 and the reflux chamber 200 extends in the horizontal direction.

[0065] The partition plate 300 extends along the length direction of the cavity. A first through port 310 is formed between one end of the partition plate 300 far from the refrigerant inlet 110 and the side wall of the cavity, and a second through port 320 is formed between one end of the partition plate 300 close to the refrigerant inlet 110 and the side wall of the cavity.

[0066] The inlets 430 of the plurality of shunt segments communicated with the plurality of flat tubes 40 arranged at the lower part are equidistantly arranged on the first top wall 510 of the mixing chamber 100, and the inlets 430 of the plurality of shunt segments communicated with the plurality of flat tubes 40 arranged at the upper part are equidistantly arranged on the second top wall 520 of the reflux chamber 200.

[0067] In some embodiments of the present application, that is, the inlets of the first shunt segment 401 to the third shunt segment 403 are equidistantly arranged on the first top wall 510 of the mixing chamber 100, and the inlets of the fourth shunt segment 404 to the seventh shunt segment 407 are arranged on the second top wall 520 of the reflux chamber 200.

[0068] In some embodiments of the present application, referring to Figure 5 , Figure 10 and Figure 11 , along the flow direction of the gas-liquid two-phase refrigerant in the mixing chamber 100, the inlet areas of the plurality of shunt segments 400 communicated with the mixing chamber 100 decrease in sequence, and the heights of the shunt segments 400 decrease in sequence.

[0069] In some embodiments of the present application, that is, the inlet of the first shunt section 401 is provided on the side away from the refrigerant inlet 110, the third shunt section 403 is provided on the side close to the refrigerant inlet 110, and the inlet areas of the third shunt section 403, the second shunt section 402, and the first shunt section 401 decrease in sequence, and the heights decrease in sequence.

[0070] In this way, the refrigerant flow rates entering the third shunt section 403, the second shunt section 402, and the first shunt section 401 decrease in sequence, and the flow resistance of the liquid refrigerant in the third shunt section 403, the second shunt section 402, and the first shunt section 401 affected by gravity also decreases in sequence, which enables the flow rates of the liquid refrigerant finally entering the first flat tube 41 to the third flat tube 43 to reach a consistent state.

[0071] During the process that the gas-liquid two-phase refrigerant enters the reflux chamber 200 through the first port 310 and flows towards the second port 320, since the area of the second port 320 is smaller than that of the first port 310, a large amount of refrigerant will accumulate at the position in the reflux chamber 200 close to the second port 320. That is to say, the refrigerant flow rate on the side of the reflux chamber 200 close to the second port 320 is greater than that on the side close to the first port 310.

[0072] Based on this, with reference to Figure 4 、 Figure 10 and Figure 11 , along the flow direction of the gas-liquid two-phase refrigerant in the reflux chamber 200, the inlet areas of the multiple shunt sections 400 communicated with the reflux chamber 200 are set to decrease in sequence, and the heights of the shunt sections 400 increase in sequence.

[0073] In some embodiments of the present application, that is, the inlet of the fourth shunt section 404 is provided on the side close to the first port 310, the inlet of the seventh shunt section 407 is provided on the side close to the second port 320, and the inlet areas of the fourth shunt section 404 to the seventh shunt section 407 decrease in sequence, and the heights increase in sequence.

[0074] In this way, by changing the inlet areas of the fourth shunt section 404 to the seventh shunt section 407 to offset part of the uneven refrigerant flow rate entering different shunt sections 400 due to the uneven distribution of the refrigerant at different positions in the reflux chamber 200, and then assisted by combining the change in the height of the shunt section 400, the flow rates of the liquid refrigerant finally entering the fourth flat tube 44 to the seventh flat tube 47 can reach a consistent state.

[0075] In some embodiments of the present application, considering that the gas-liquid two-phase refrigerant flow rate in the mixing chamber 100 is less than that in the reflux chamber 200, the total inlet area of the plurality of shunt sections 400 (the first shunt section 401 to the third shunt section 403) connected to the mixing chamber 100 is set as S1, and the total inlet area of the plurality of shunt sections 400 (the fourth shunt section 404 to the seventh shunt section 407) connected to the reflux chamber 200 is set as S2, where S1 > S2, so as to make the refrigerant flow rates entering the first flat tube 41 to the seventh flat tube 47 consistent, realize the uniform distribution of the refrigerant, and finally realize the uniform heat exchange of the heat exchanger.

[0076] In some embodiments of the present application, the first shunt section 401 to the third shunt section 403 are equidistantly arranged on the first top wall 510 of the mixing chamber 100. The inlet width of the first shunt section 401 is 4 / 5 times the width W1 of the first top wall 510, and the inlet width of the third shunt section 403 is equal to the width W1 of the first top wall 510.

[0077] The fourth shunt section 404 to the seventh shunt section 407 are equidistantly arranged on the second top wall 520 of the reflux chamber 200. The inlet width of the fourth shunt section 404 is 1 / 2 times the width W2 of the second top wall 520, and the inlet width of the seventh shunt section 407 is 1 / 4 times the width W2 of the second top wall 520.

[0078] In some embodiments of the present application, referring to Figures 6 to 9 , the shunt section 400 includes a connected shunt vertical section 410 and a shunt horizontal section 420. The inlet of the shunt vertical section 410 is arranged on the first top wall 510 and the second top wall 520, and the outlet of the shunt horizontal section 420 is connected to the corresponding flat tube 40.

[0079] The plurality of shunt vertical sections 410 connected to the mixing chamber 100 are equidistantly spaced along the length direction of the mixing chamber 100, and the plurality of shunt vertical sections 410 connected to the reflux chamber 200 are equidistantly spaced along the length direction of the reflux chamber 200.

[0080] According to the Froude number Fr = U2 / gL, it characterizes the relative magnitudes of the fluid inertial force and the gravity. When Fr > 1, the fluid inertial force in the shunt vertical section 410 can overcome its gravity and drive the fluid to flow upward. Therefore, it is necessary to limit the width of the shunt vertical section 410.

[0081] In some embodiments of the present application, the width of the shunt vertical section 410 is 0.2 - 1.5 mm.

[0082] In some embodiments of the present application, the width of the shunt vertical section 410 is 1 mm.

[0083] In some embodiments of the present application, the distance interval between two adjacent diversion vertical segments 410 is 1 to 10 times the width of the diversion vertical segment 410.

[0084] In some embodiments of the present application, the distance interval between two adjacent diversion vertical segments 410 is 3 times the width of the diversion vertical segment 410.

[0085] In some embodiments of the present application, the distance between the inlet of the fourth diversion segment 404 and the refrigerant inlet 110 is 1 to 20 times the width of the diversion vertical segment 410.

[0086] In some embodiments of the present application, the distance between the inlet of the fourth diversion segment 404 and the refrigerant inlet 110 is 7 times the width of the diversion vertical segment 410.

[0087] In some embodiments of the present application, referring to Figures 2 to 5 , the heat exchanger further has a plurality of gas pipes 70, the plurality of gas pipes 70 are in one-to-one correspondence and communication with the plurality of flat pipes 40, and gaseous refrigerant flows in the gas pipes 70.

[0088] In some embodiments of the present application, a gas collecting channel 600 is formed in the distributor 10, and the gas collecting channel 600 is in communication with the plurality of gas pipes 70.

[0089] After the refrigerant in each flat pipe 40 of the second process is heat-exchanged, it becomes gaseous refrigerant. The gaseous refrigerant flows into the corresponding gas pipe 70, and the gaseous refrigerant flows into the gas collecting channel 600 along the gas pipe 70, and then is discharged from the gas collecting channel 600.

[0090] The distributor 10 integrates the gas collecting function, and there is no need to additionally configure a gas collecting pipe in the heat exchanger, which greatly reduces the overall volume of the heat exchanger, thereby contributing to the miniaturized design of the air conditioner.

[0091] In some embodiments of the present application, referring to Figure 3 , the plurality of flat pipes 40 and the plurality of gas pipes 70 are arranged at equal intervals in the vertical direction, and the gas pipes 70 are located above the corresponding flat pipes 40 communicated therewith.

[0092] When the refrigerant flows along the flat pipe of the second process, when it flows to the end of the flat pipe 40, the gaseous refrigerant floats upward. The gas pipe 70 is arranged above the flat pipe 40, which is convenient for the flow of the gaseous refrigerant.

[0093] In some embodiments of the present application, continuing to refer to Figure 3 , an air outlet pipeline 80 is provided on the distributor 10, and the gas collecting channel 600 is in communication with the air outlet pipeline 80, so as to discharge the gaseous refrigerant in the gas collecting channel 600 through the air outlet pipeline 80.

[0094] In some embodiments of the present application, the gas collection channel 600 includes a main channel 610 and a plurality of branch channels 620 communicating with the main channel 610. The plurality of branch channels 620 are in one-to-one correspondence and communication with a plurality of tracheas 70, and the main channel 610 is in communication with the outlet pipeline 80, facilitating the collection and discharge of the gaseous refrigerant.

[0095] In some embodiments of the present application, the processing technology of the dispenser 10 is also improved. The dispenser 10 is formed by welding a plurality of laminations. Different profiles are formed on different laminations. The overall dispenser is formed by stacking and welding the plurality of laminations. The internal related structures of the dispenser such as the mixing chamber 100, the reflux chamber 200, the partition 300, the first through port 310, the second through port 320, and the shunt section 400 are surrounded by different laminations.

[0096] In some embodiments of the present application, the width of each lamination is 0.5 - 2 mm.

[0097] In some embodiments of the present application, the width of each lamination is 1 mm.

[0098] The processing technology of stacking and welding a plurality of laminations can eliminate the problem of easy deformation of the dispenser produced by using the stamping process in the prior art.

[0099] In some embodiments of the present application, the lamination is an aluminum alloy lamination with solder. Surface welding is used during welding, which can effectively eliminate problems such as refrigerant leakage caused by poor welding.

[0100] The above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air conditioner, comprising a heat exchanger, characterized in that, The heat exchanger includes: A plurality of flat tubes through which a refrigerant flows, and the plurality of flat tubes are arranged at intervals in the vertical direction in sequence; A distributor for uniformly distributing the gas-liquid two-phase refrigerant into the plurality of flat tubes. There is formed in the distributor: A mixing chamber through which the gas-liquid two-phase refrigerant input from the refrigeration pipeline flows. A refrigerant inlet is provided on the side wall of the mixing chamber; A reflux chamber communicating with the mixing chamber, and part of the refrigerant in the mixing chamber can flow back to the mixing chamber through the reflux chamber; A plurality of shunt sections, which are in one-to-one correspondence and communication with the plurality of flat tubes. The inlets of the plurality of shunt sections communicating with the plurality of flat tubes arranged at the lower part are communicated with the mixing chamber, and the inlets of the plurality of shunt sections communicating with the plurality of flat tubes arranged at the upper part are communicated with the reflux chamber; A plurality of gas pipes, which are in one-to-one correspondence and communication with the plurality of flat tubes, and gaseous refrigerant flows through the gas pipes; When the gas-liquid two-phase refrigerant evaporates in the heat exchanger, part of the gas-liquid two-phase refrigerant input from the refrigeration pipeline into the mixing chamber directly flows upward into the flat tubes located at the lower positions, and the other part flows back into the reflux chamber; and for the gas-liquid two-phase refrigerant in the reflux chamber, part of it directly flows upward into the flat tubes located at the upper positions, and the other part flows back into the mixing chamber; The total inlet area of the plurality of shunt sections communicating with the mixing chamber is S1, and the total inlet area of the plurality of shunt sections communicating with the reflux chamber is S2, and S1 > S2; The distributor is formed by stacking and welding a plurality of laminations.

2. The air conditioner according to claim 1, wherein Along the flow direction of the refrigerant in the mixing chamber, the inlet areas of the plurality of shunt sections communicating with the mixing chamber decrease in sequence, and the heights of the shunt sections decrease in sequence; Along the flow direction of the refrigerant in the reflux chamber, the inlet areas of the plurality of shunt sections communicating with the reflux chamber decrease in sequence, and the heights of the shunt sections increase in sequence.

3. The air conditioner according to claim 1, wherein The mixing chamber and the reflux chamber are separated by a partition board. A first through port and a second through port are provided on the partition board. The refrigerant in the mixing chamber can flow into the reflux chamber through the first through port, and the refrigerant in the reflux chamber flows into the mixing chamber through the second through port; The inlets of the plurality of shunt sections communicating with the plurality of flat tubes arranged at the lower part are provided on the top wall of the mixing chamber, and the inlets of the plurality of shunt sections communicating with the plurality of flat tubes arranged at the upper part are provided on the top wall of the reflux chamber.

4. The air conditioner according to claim 3, wherein The area of the second through port is smaller than the area of the first through port.

5. The air conditioner according to claim 3, wherein The axis of the refrigerant inlet and the axis of the second through port are on the same horizontal plane, and the direction in which the refrigerant flows in from the refrigerant inlet is perpendicular to the direction in which the refrigerant flows in from the second through port.

6. The air conditioner according to claim 3, wherein The bottom of the first through port is flush with the bottom of the second through port.

7. The air conditioner according to claim 1, wherein the shunt section includes a shunt vertical section and a shunt horizontal section that are connected. The inlet of the shunt vertical section is provided on the top walls of the mixing chamber and the reflux chamber. The outlet of the shunt horizontal section is connected to the corresponding flat tube. The multiple shunt vertical sections connected to the mixing chamber are arranged at intervals along the length direction of the mixing chamber, and the multiple shunt vertical sections connected to the reflux chamber are arranged at intervals along the length direction of the reflux chamber.

8. The air conditioner according to any one of claims 1 to 7, wherein an air collecting channel is further formed in the distributor, and the air collecting channel is connected to the multiple tracheas.

9. The air conditioner according to claim 8, wherein the multiple flat tubes and the multiple tracheas are arranged at intervals in the vertical direction, and the tracheas are located above the flat tubes connected thereto.

10. The air conditioner according to claim 8, characterized in that, The air collecting channel includes a main channel and multiple branch channels connected to the main channel. The multiple branch channels are in one-to-one correspondence and connection with the multiple tracheas. The main channel is connected to the air outlet pipeline so as to discharge the gaseous refrigerant in the air collecting channel through the air outlet pipeline.

11. The air conditioner according to claim 1, characterized in that, The laminated sheet uses an aluminum alloy laminated sheet with solder.

Images