Heat exchange system and air conditioner with same

Abstract

The heat exchange system comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger and a gas-liquid separator, the outdoor heat exchanger comprises a first heat exchange module and a second heat exchange module, the two ends of the first heat exchange module are a first end and a second end, the first end is communicated with a second opening, and the second end is communicated with a second opening. The two ends of the second heat exchange module are the third end and the fourth end, the fourth end communicates with the other end of the indoor heat exchanger, and the ratio A of the number of the heat exchange pipes in the second heat exchange module to the number of the heat exchange pipes in the outdoor heat exchanger meets the condition that A is larger than or equal to 16.7% and smaller than or equal to 35%; the gas-liquid separator is provided with a first inlet-outlet, a second inlet-outlet and a gas outlet, the second end is communicated with the first inlet-outlet, the second inlet-outlet is communicated with the third end, and the gas outlet is communicated with the second opening. According to the heat exchange system, the heat exchange effect of the outdoor heat exchanger in the refrigeration mode and the heating mode is improved at the same time.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to air treatment equipment technical field, especially a heat exchange system and air conditioner with it. BACKGROUND

[0002] In prior art, the outdoor heat exchanger includes two heat exchangers, when the outdoor heat exchanger works as evaporator in heating mode, the heat exchange capacity per pump power increases with the size difference between the two heat exchangers, when the outdoor heat exchanger works as condenser, the heat exchange capacity per pump power increases first and then decreases with the size difference between the two heat exchangers, it is difficult to balance the size of the two outdoor heat exchangers. SUMMARY

[0003] The utility model aims at at least one of the technical problems in prior art is solved, for this purpose, the utility model provides a heat exchange system, the heat exchange system improves the heat exchange effect of outdoor heat exchanger in cooling mode and heating mode simultaneously.

[0004] The utility model further provides an air conditioner, the air conditioner includes above-mentioned heat exchange system.

[0005] The heat exchange system according to the utility model embodiment, including compressor, four-way valve, indoor heat exchanger, outdoor heat exchanger and gas-liquid separator, the compressor has exhaust port and back gas port;The four-way valve has first port, second port, third port and fourth port, the first port is communicated with one of the second port and the third port, the fourth port is communicated with the other of the second port and the third port, the first port is communicated with the exhaust port, the fourth port is communicated with the back gas port;One end of the indoor heat exchanger is communicated with the third port;The outdoor heat exchanger includes first heat exchange module and second heat exchange module, two ends of the first heat exchange module are first end and second end, the first end is communicated with the second port, two ends of the second heat exchange module are third end and fourth end, the fourth end is communicated with the other end of the indoor heat exchanger, the ratio A of the number of heat exchange pipes in the second heat exchange module and the number of heat exchange pipes in the outdoor heat exchanger satisfies: 16.7%≤A≤35%;The gas-liquid separator has first access, second access and gas outlet, the second end is communicated with the first access, the second access is communicated with the third end, the gas outlet is communicated with the second port.

[0006] According to the heat exchange system, the gas-liquid separator is arranged between the first heat exchange module and the second heat exchange module of the outdoor heat exchanger, the second end of the first heat exchange module is in communication with the first inlet and outlet of the gas-liquid separator, the second inlet and outlet of the gas-liquid separator are in communication with the third end of the second heat exchange module, the gas outlet of the gas-liquid separator is in communication with one end of the indoor heat exchanger, and the ratio A of the number of heat exchange pipes in the second heat exchange module to the number of heat exchange pipes in the outdoor heat exchanger satisfies 2 <= A <= 9; the heat exchange effect of the outdoor heat exchanger is good when the outdoor heat exchanger works as an evaporator in the heating mode, and the heat exchange effect of the outdoor heat exchanger when the outdoor heat exchanger works as a condenser in the refrigeration process can be avoided from being reduced, and meanwhile, the heat exchange effect of the outdoor heat exchanger in the refrigeration mode and the heating mode is improved.

[0007] In some embodiments of the present application, a first flow path is in communication between the gas outlet and the second port, and a first one-way valve is arranged on the first flow path, wherein the first one-way valve only allows the heat exchange medium to flow from the gas outlet to the second port.

[0008] In some embodiments of the present application, the first heat exchange module comprises a plurality of parallel first heat exchange flow paths, and / or the second heat exchange module comprises a plurality of parallel second heat exchange flow paths.

[0009] In some embodiments of the present application, the heat exchange system further comprises a first liquid distribution device, one end of the first liquid distribution device is in communication with the first inlet and outlet, and the other end is in communication with a plurality of first heat exchange flow paths.

[0010] In some embodiments of the present application, the heat exchange system further comprises a second liquid distribution device, one end of the second liquid distribution device is in communication with the second inlet and outlet, and the other end is in communication with a plurality of second heat exchange flow paths.

[0011] In some embodiments of the present application, the cross sections of the plurality of first heat exchange flow paths are N-shaped and / or inverted N-shaped, the cross sections of the plurality of second heat exchange flow paths are N-shaped and / or U-shaped, and the cross sections are perpendicular to the axial direction of the heat exchange pipes.

[0012] In some embodiments of the present application, a throttling device is arranged between the fourth end and the indoor heat exchanger.

[0013] In some embodiments of the present application, the ratio A of the number of heat exchange pipes in the second heat exchange module to the number of heat exchange pipes in the outdoor heat exchanger satisfies 25% <= A <= 30%.

[0014] In some embodiments of the present application, the gas-liquid separator comprises a shell, the gas outlet is arranged on the top wall of the shell, and the first inlet and the second inlet are arranged close to the bottom wall of the shell.

[0015] The air conditioner according to the embodiment of the present application comprises the heat exchange system.

[0016] The air conditioner according to the embodiment of the present application, by setting the gas-liquid separator between the first heat exchange module and the second heat exchange module of the outdoor heat exchanger, the second end of the first heat exchange module is communicated with the first inlet and outlet of the gas-liquid separator, the second inlet and outlet of the gas-liquid separator is communicated with the third end of the second heat exchange module, the gas outlet of the gas-liquid separator is communicated with one end of the indoor heat exchanger, the ratio A of the number of heat exchange pipes in the second heat exchange module to the number of heat exchange pipes in the outdoor heat exchanger satisfies 2≤A≤9, the heat exchange effect of the outdoor heat exchanger as the evaporator in the heating mode is better, and the heat exchange effect of the outdoor heat exchanger as the condenser in the refrigeration process can be avoided from being reduced, and the heat exchange effect of the outdoor heat exchanger in the refrigeration mode and the heating mode is improved.

[0017] Additional aspects and advantages of the present application will be described in part below with reference to the description and will be apparent from the description, or will be learned from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic diagram of the refrigeration mode of the heat exchange system according to the embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the heating mode of the heat exchange system according to the embodiment of the present application;

[0021] Figure 3 is a side view of the gas-liquid separator of the heat exchange system according to the embodiment of the present application;

[0022] Figure 4 is a front view of the gas-liquid separator of the heat exchange system according to the embodiment of the present application.

[0023] REFERENCE NUMERALS:

[0024] 100, heat exchange system;

[0025] 1, gas-liquid separator; 11, first inlet and outlet; 12, second inlet and outlet; 13, gas outlet; 14, shell;

[0026] 2, compressor; 21, exhaust port; 22, gas return port;

[0027] 3, four-way valve; 31, first port; 32, second port; 33, third port; 34, fourth port;

[0028] 4, indoor heat exchanger;

[0029] 5, outdoor heat exchanger; 51, first heat exchange module; 511, first end; 512, second end; 513, first heat exchange flow path; 52, second heat exchange module; 521, third end; 522, fourth end; 523, second heat exchange flow path;

[0030] 6, first flow path; 62, first one-way valve;

[0031] 7, first liquid separation device; 8, throttling device; 9, liquid storage tank. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features limited as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0034] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The heat exchange system 100 according to the embodiments of the present application will be described below with reference to the drawings.

[0036] As Figure 1As shown, the heat exchange system 100 according to the embodiment of the present application comprises a compressor 2, a four-way valve 3, an indoor heat exchanger 4, an outdoor heat exchanger 5 and a gas-liquid separator 1.

[0037] Specifically, the compressor 2 has a discharge port 21 and a return gas port 22, and the heat exchange system 100 is used for an air conditioner, wherein the compressor 2 generates high-temperature and high-pressure gaseous heat exchange medium in the refrigeration mode, and the gaseous heat exchange medium is discharged through the discharge port 21 to provide power for the refrigeration cycle.

[0038] As shown, Figure 1 the four-way valve 3 has a first port 31, a second port 32, a third port 33 and a fourth port 34, the first port 31 is in communication with one of the second port 32 and the third port 33, the fourth port 34 is in communication with the other one of the second port 32 and the third port 33, and the first port 31 is in communication with the discharge port 21. It can be understood that the first port 31 is in communication with the second port 32, and the fourth port 34 is in communication with the third port 33; or the first port 31 is in communication with the third port 33, and the fourth port 34 is in communication with the second port 32; and one end of the indoor heat exchanger 4 is in communication with the third port 33.

[0039] The outdoor heat exchanger 5 comprises a first heat exchange module 51 and a second heat exchange module 52, two ends of the first heat exchange module 51 are a first end 511 and a second end 512, the first end 511 is in communication with the second port 32, and two ends of the second heat exchange module 52 are a third end 521 and a fourth end 522, the fourth end 522 is in communication with the other end of the indoor heat exchanger 4. It can be understood that, in the refrigeration mode, the compressor 2 generates high-temperature and high-pressure gaseous heat exchange medium, and the gaseous heat exchange medium is discharged through the discharge port 21, enters the four-way valve 3 through the first port 31, the first port 31 is in communication with the second port 32, the fourth port 34 is in communication with the third port 33, the high-temperature and high-pressure gaseous heat exchange medium enters the outdoor heat exchanger 5 through the first end 511, the heat exchange medium exchanges heat with the external environment (air or water) through the outdoor heat exchanger 5, so as to be cooled and condensed into medium-temperature and high-pressure liquid heat exchange medium. Then the liquid heat exchange medium flows out of the outdoor heat exchanger 5 from the fourth end 522, enters the indoor heat exchanger 4, the heat exchange medium in the indoor heat exchanger 4 exchanges heat with the relatively hot external airflow, the heat exchange medium in the indoor heat exchanger 4 absorbs heat to change phase, and forms low-temperature gaseous or gas-liquid mixed heat exchange medium, the heat exchange medium flowing out of the indoor heat exchanger 4 enters the third port 33 of the four-way valve 3, flows out of the four-way valve 3 from the fourth port 34 in communication with the third port 33, and flows back to the return gas port 22 of the compressor 2.

[0040] As shown, Figure 1 and Figure 3 the gas-liquid separator 1 has a first inlet and outlet 11, a second inlet and outlet 12 and an air outlet 13, the second end 512 is in communication with the first inlet and outlet 11, the second inlet and outlet 12 is in communication with the third end 521, and the air outlet 13 is in communication with the other end of the indoor heat exchanger 4. It can be understood that, as Figure 1As shown, in the refrigeration mode, the compressor 2 generates high-temperature and high-pressure gaseous heat exchange medium, which is discharged through the exhaust port 21, enters the four-way valve 3 through the first port 31, and the first port 31 is in communication with the second port 32, and the fourth port 34 is in communication with the third port 33. The high-temperature and high-pressure gaseous heat exchange medium enters the first heat exchange module 51 through the first end 511, and the heat exchange medium exchanges heat with the external environment (air or water) through the first heat exchange module 51, part of which is cooled and condensed into medium-temperature and high-pressure liquid heat exchange medium. The second port 12 can be the gas outlet of the gas-liquid separator 1, and the gas outlet 13 can be the liquid outlet of the gas-liquid separator 1; or, the second port 12 can be the liquid outlet of the gas-liquid separator 1, and the gas outlet 13 can be the gas outlet of the gas-liquid separator 1.

[0041] At this time, the heat exchange medium in the first heat exchange module 51 close to the second end 512 is in a gas-liquid mixed state, and the heat exchange medium in a gas-liquid mixed state enters the gas-liquid separator 1 through the first port 11 from the second end 512, and after gas-liquid separation, the liquid heat exchange medium flows to the indoor heat exchanger 4 through the gas outlet 13, and the gaseous heat exchange medium enters the second heat exchange module 52 through the second port 12 from the third end 521. The heat exchange medium exchanges heat with the external environment (air or water) through the second heat exchange module 52, the gaseous heat exchange medium is cooled and condensed into medium-temperature and high-pressure liquid heat exchange medium, and then flows out of the second heat exchange module 52 from the fourth end 522, enters the indoor heat exchanger 4, and the heat exchange medium in the indoor heat exchanger 4 exchanges heat with the relatively hot external airflow. The heat exchange medium in the indoor heat exchanger 4 absorbs heat and undergoes phase change to form gaseous or gas-liquid mixed heat exchange medium with lower temperature, and the heat exchange medium flowing out of the indoor heat exchanger 4 enters the third port 33 of the four-way valve 3, flows out of the four-way valve 3 from the fourth port 34 in communication with the third port 33, and flows back to the gas inlet 22 of the compressor 2.

[0042] Therefore, in the refrigeration process, the amount of liquid heat exchange medium in the outdoor heat exchanger 5 can be reduced, the liquid heat exchange medium is prevented from being adsorbed on the inner wall of the heat exchange pipe of the outdoor heat exchanger 5, the heat transfer coefficient is prevented from being reduced with the thickening of the film thickness of the liquid heat exchange medium on the inner wall of the heat exchange pipe, the heat transfer coefficient is increased, and the condensation effect of the outdoor heat exchanger 5 in the refrigeration process is improved.

[0043] At this time, the high-temperature gaseous heat exchange medium discharged from the exhaust port 21 of the compressor 2 passes through the four-way valve 3, enters the first heat exchange module 51 to release heat and become liquid heat exchange medium, the liquid heat exchange medium enters the second heat exchange module 52 through the gas-liquid separator 1 to continue releasing heat and condensing, then enters the indoor heat exchanger 4 to evaporate and absorb heat, becomes gaseous heat exchange medium, flows back to the gas inlet 22 of the compressor 2 through the four-way valve 3, and completes a cycle.

[0044] As shown in FIG. 1, the air conditioner comprises a compressor 2, a four-way valve 3, an indoor heat exchanger 4, an outdoor heat exchanger 5, a gas-liquid separator 1, and a control system 6. Figure 2As shown, in the heating mode, the compressor 2 produces high-temperature and high-pressure gaseous heat exchange medium, which is discharged through the exhaust port 21, enters the four-way valve 3 through the first port 31, the first port 31 is in communication with the third port 33, and the fourth port 34 is in communication with the second port 32,

[0045] The high-temperature and high-pressure gaseous heat exchange medium enters the indoor heat exchanger 4 through the third port 33, and the heat exchange medium exchanges heat with the external environment (air or water) through the indoor heat exchanger 4, releases a large amount of heat, thereby heating the indoor air, and the heat exchange medium condenses from a gaseous state to a liquid state while releasing condensation heat. The heat exchange medium flowing out of the indoor heat exchanger 4 forms a low-temperature and low-pressure gas-liquid mixture and flows to the fourth end 522 of the second heat exchange module 52,

[0046] The gaseous heat exchange medium enters the second heat exchange module 52 through the fourth end 522, and the heat exchange medium exchanges heat with the external environment (air or water) through the second heat exchange module 52. The heat exchange medium in the second heat exchange module 52 absorbs heat to produce a phase change, some of which form gaseous or gas-liquid mixed heat exchange medium at a lower temperature.

[0047] At this time, the heat exchange medium in the second heat exchange module 52 close to the third end 521 is in a gas-liquid mixed state, and the heat exchange medium in a gas-liquid mixed state enters the gas-liquid separator 1 through the first inlet 11 from the third end 521. After gas-liquid separation, the gaseous heat exchange medium flows to the second port 32 through the second inlet 12, and the liquid heat exchange medium enters the first heat exchange module 51 from the second end 512 through the gas outlet 13. The heat exchange medium exchanges heat with the external environment (air or water) through the first heat exchange module 51. The heat exchange medium in the first heat exchange module 51 absorbs heat to produce a phase change, forming gaseous heat exchange medium at a lower temperature, which then flows out of the first heat exchange module 51 from the first end 511, enters the second port 32, flows out of the four-way valve 3 from the fourth port 34 in communication with the second port 32, and flows back to the gas inlet 22 of the compressor 2.

[0048] Thus, in the heating process, the amount of gaseous heat exchange medium in the outdoor heat exchanger 5 can be reduced, the dryness of the heat exchange medium can be avoided, the gaseous heat exchange medium evaporated by the second heat exchange module 52 can be separated from the second heat exchange module 52 in time, the proportion of mist flow and gas flow can be reduced, and the heat transfer coefficient of the outdoor heat exchanger 5 can be ensured to be high. At the same time, the separation of gaseous heat exchange medium reduces the pressure drop of the outdoor heat exchanger 5, which can improve the operating efficiency of the heat exchange system 100.

[0049] In addition, since the gas-phase heat exchange medium in the gas-liquid two-phase heat exchange medium out of the second heat exchange module 52 has no evaporation heat absorption capacity, the gas-phase heat exchange medium is separated out by the gas-liquid separator 1 so as not to enter the first heat exchange module 51 for heat exchange, which can reduce the flow of the heat exchange medium of the first heat exchange module 51, reduce the pressure loss of the first heat exchange module 51, and the separated gas-phase refrigerant can be combined with the gaseous heat exchange medium out of the first heat exchange module 51, which can increase the suction amount of the compressor 2, thereby increasing the input power of the compressor 2 and improving the heating capacity

[0050] The ratio A of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 satisfies 16.7%≤A≤35%. It can be understood that the ratio A of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 can be 16.7%, 17%, 17.3%, 17.6%, 17.9%, 18.2%, 18.5%, 18.8%, 19.1%, 19.4%, 19.7%, 20%, 20.3%, 20.6%, 20.9%, 21.2%, 21.5%, 21.8%, 22.1%, 22.4%, 22.7%, 23%, 23.3%, 23.6%, 23.9%, 24.2%, 24.5%, 24.8%, 25.1%, 25.4%, 25.7%, 26%, 26.3%, 26.6%, 26.9%, 27.2%, 27.5%, 27.8%, 28.1%, 28.4%, 28.7%, 29%, 29.3%, 29.6%, 29.9%, 30.2%, 30.5%, 30.8%, 31.1%, 31.4%, 31.7%, 32%, 32.3%, 32.6%, 32.9%, 33.2%, 33.5%, 33.8%, 34.1%, 34.4%, 34.7%, or 35%. The ratio A of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 is 16.7%-35%, when the outdoor heat exchanger 5 is used as an evaporator, the unit pump power heat exchange capacity of the outdoor heat exchanger 5 increases with the increase of the ratio of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5, and when the outdoor heat exchanger 5 is used as a condenser, the unit pump power heat exchange capacity of the outdoor heat exchanger 5 presents a trend of first increasing and then decreasing with the increase of the ratio of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5, the number of heat exchange tubes in the second heat exchange module 52 is 16.7%-35% of the number of heat exchange tubes in the outdoor heat exchanger 5, the heat exchange effect is better when the outdoor heat exchanger 5 is used as an evaporator, and the influence on the decrease of the heat exchange effect when the outdoor heat exchanger 5 is used as a condenser can be avoided, and the heat exchange effect of the outdoor heat exchanger 5 in the cooling mode and the heating mode is improved.

[0051] Meanwhile, a ratio S of a heat exchange flow path volume of the first heat exchange module 51 to a heat exchange flow path volume of the second heat exchange module 52 satisfies: 2≤S≤9. It can be understood that the ratio S of the number of heat exchange tubes in the first heat exchange module 51 to the number of heat exchange tubes in the second heat exchange module 52 can be 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5 or 9. When the ratio S of the heat exchange flow path volume of the first heat exchange module 51 to the heat exchange flow path volume of the second heat exchange module 52 is 2-9, the unit pump power heat exchange capacity also increases when the outdoor heat exchanger 5 works as an evaporator, and the unit pump power heat exchange capacity presents a trend of first increasing and then decreasing when the outdoor heat exchanger 5 works as a condenser. When the number of heat exchange tubes in the first heat exchange module 51 is 2-9 times the number of heat exchange tubes in the second heat exchange flow path 523, the heat exchange effect of the outdoor heat exchanger 5 as an evaporator is better, and the heat exchange effect of the outdoor heat exchanger 5 as a condenser is avoided from being reduced, and the heat exchange effect of the outdoor heat exchanger 5 in the cooling mode and the heating mode is improved. According to the heat exchange system 100 in the embodiment of the present application, the gas-liquid separator 1 is arranged between the first heat exchange module 51 and the second heat exchange module 52 of the outdoor heat exchanger 5, the second end 512 of the first heat exchange module 51 is communicated with the first inlet and outlet 11 of the gas-liquid separator 1, the second inlet and outlet 12 of the gas-liquid separator 1 is communicated with the third end 521 of the second heat exchange module 52, the gas outlet 13 of the gas-liquid separator 1 is communicated with one end of the indoor heat exchanger 4, and the ratio A of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 satisfies: 16.7%-35%. The heat exchange effect of the outdoor heat exchanger 5 as an evaporator in the heating mode is better, and the heat exchange effect of the outdoor heat exchanger 5 as a condenser in the cooling process is avoided from being reduced, and the heat exchange effect of the outdoor heat exchanger 5 in the cooling mode and the heating mode is improved.

[0052] In some embodiments of the present application, as shown in Figure 1 and Figure 2 The gas outlet 13 and the second port 32 are communicated with the first flow path 6, the first flow path 6 is provided with the first one-way valve 62, and the first one-way valve 62 only allows the heat exchange medium to flow from the gas outlet 13 to the second port 32. It can be understood that the first one-way valve 62 is configured to open the first flow path 6 when the heat exchange medium flows from the gas outlet 13 to the second port 32, and close the first flow path 6 when the heat exchange medium flows from the second port 32 to the gas outlet 13. The reverse flow of the heat exchange medium at the second port 32 can be avoided, and the heat exchange medium can flow smoothly to the second port 32 in the heating mode, thereby increasing the heat exchange efficiency of the outdoor heat exchanger 5.

[0053] In some embodiments of the present application, as shown in Figure 1 and Figure 2As shown, the first heat exchange module 51 includes a plurality of parallel first heat exchange flow paths 513, and the heat exchange medium enters the plurality of first heat exchange flow paths 513 respectively to perform heat exchange, so as to avoid the singularity of the flow direction of the heat exchange medium and avoid affecting the heat exchange effect of the first heat exchange module 51.

[0054] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 As shown, the second heat exchange module 52 includes a plurality of parallel second heat exchange flow paths 523, and the heat exchange medium enters the plurality of second heat exchange flow paths 523 respectively to perform heat exchange, so as to avoid the singularity of the flow direction of the heat exchange medium and avoid affecting the heat exchange effect of the second heat exchange module 52.

[0055] Further, as shown in Figure 1 The heat exchange system 100 further includes a first liquid distribution device 7, one end of the first liquid distribution device 7 is communicated with the first inlet and outlet 11, and the other end is communicated with the plurality of first heat exchange flow paths 513. The first liquid distribution device 7 can uniformly distribute the liquid heat exchange medium to each first heat exchange flow path 513, so as to ensure the balanced operation of the heat exchange system 100.

[0056] Further, the heat exchange system 100 further includes a second liquid distribution device, one end of the second liquid distribution device is communicated with the second inlet and outlet 12, and the other end is communicated with the plurality of second heat exchange flow paths 523. The second liquid distribution device can uniformly distribute the liquid heat exchange medium to each second heat exchange flow path 523, so as to ensure the balanced operation of the heat exchange system 100.

[0057] In some embodiments of the utility model, the plurality of first heat exchange flow paths 513 are N-shaped and / or inverted N-shaped in cross section; the plurality of second heat exchange flow paths 523 are N-shaped and / or U-shaped in cross section; wherein the cross section is perpendicular to the axis direction of the heat exchange pipe. It can be understood that the plurality of first heat exchange flow paths 513 are N-shaped, or the plurality of first heat exchange flow paths 513 are inverted N-shaped, or the plurality of first heat exchange flow paths 513 are N-shaped and inverted N-shaped; the plurality of second heat exchange flow paths 523 are N-shaped, or the plurality of second heat exchange flow paths 523 are U-shaped, or the plurality of second heat exchange flow paths 523 are N-shaped and U-shaped. The cross section of the first heat exchange flow path 513 and the second heat exchange flow path 523 can be selected according to design requirements to meet different outdoor heat exchanger 5 heat exchange efficiency requirements.

[0058] In this embodiment, as shown in Figure 1 and Figure 2As shown, the fourth end 522 and the indoor heat exchanger 4 are provided with a throttling device 8. In the refrigeration mode, the heat exchange medium flowing out of the outdoor heat exchanger 5 flows to the throttling device 8, and the throttling device 8 reduces the condensing pressure of the heat exchange medium to the evaporation pressure. A part of the liquid heat exchange medium will be converted into steam to form a low-temperature and low-pressure gas-liquid mixture and flow out of the throttling device 8 into the indoor heat exchanger 4. Specifically, the throttling device 8 can be an electronic expansion valve, a capillary tube or a throttling valve.

[0059] In some embodiments of the present application, the ratio A of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 satisfies: 25%≤A≤30%. It can be understood that the ratio of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 can be 25%, 25.5%, 26%, 26.5%, 27%, 27.5%, 28%, 28.5%, 29%, 29.5% or 30%. When the ratio A of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 is 25%-30%, the unit pump power heat exchange capacity of the outdoor heat exchanger 5 as an evaporator increases with the increase of the ratio of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5, and the unit pump power heat exchange capacity of the outdoor heat exchanger 5 as a condenser presents a trend of first increasing and then decreasing with the increase of the ratio of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5. When the number of heat exchange tubes in the second heat exchange module 52 is 25%-30% of the number of heat exchange tubes in the outdoor heat exchanger 5, the heat exchange effect of the outdoor heat exchanger 5 as an evaporator is better, and the heat exchange effect of the outdoor heat exchanger 5 as a condenser can be avoided to be reduced, and the heat exchange effect of the outdoor heat exchanger 5 in the refrigeration mode and the heating mode is improved.

[0060] In some embodiments of the present application, as shown in Figure 1 and Figure 2 A liquid storage tank 9 is arranged between the fourth port 34 and the gas return port 22. The heat exchange medium about to enter the gas return port 22 is gas-liquid separated to ensure that the compressor 2 can operate safely and efficiently.

[0061] In some embodiments of the present application, as shown in Figure 1 , Figure 3 and Figure 4As shown, the gas-liquid separator 1 comprises a shell 14, the gas outlet 13 is arranged at the top wall of the shell 14, and the first inlet 11 and the second inlet 12 are arranged close to the bottom wall of the shell 14. The first inlet 11 and the second inlet 12 are arranged closer to the bottom wall of the shell 14 relative to the top wall of the shell 14, so that the gaseous heat exchange medium can be evaporated upward and discharged from the gas outlet 13 of the gas-liquid separator 1, and the first inlet 11 and the second inlet 12 are arranged at a lower position, so that there is not too much liquid heat exchange medium in the shell 14 of the gas-liquid separator 1 in the refrigeration mode, and the heat exchange efficiency of the outdoor heat exchanger 5 is not affected.

[0062] In addition, the heat exchange medium at the second inlet 12 is in a gas-liquid mixed state, and after gas-liquid separation, the heat exchange medium flowing to the first inlet 11 is in a liquid state. When the diameter of the first inlet 11 is smaller than that of the second inlet 12, the cross-sectional area of the first inlet 11 is smaller than that of the second inlet 12, so that the inflow and outflow speeds of the liquid heat exchange medium at the first inlet 11 and the gas-liquid mixed heat exchange medium at the second inlet 12 are balanced, and the pressure balance effect in the gas-liquid separator 1 is increased.

[0063] In some embodiments of the present application, as shown in Figure 4 As shown, the diameter of the gas outlet 13 is D3, and D3≤D2. It can be understood that the heat exchange medium at the second inlet 12 is in a gas-liquid mixed state, and after gas-liquid separation, the heat exchange medium flowing to the gas outlet 13 is in a gaseous state. When the diameter of the gas outlet 13 is smaller than or equal to that of the second inlet 12, the cross-sectional area of the gas outlet 13 is smaller than that of the second inlet 12, so that the inflow and outflow speeds of the gaseous heat exchange medium at the gas outlet 13 and the gas-liquid mixed heat exchange medium at the second inlet 12 are balanced, and the pressure balance effect in the gas-liquid separator 1 is increased.

[0064] In some embodiments of the utility model, first access 11 and second access 12 all face one side of shell 14, first access 11 and second access 12 all extend along horizontal direction, and the extension direction of first access 11 is parallel to the extension direction of second access 12. It can be understood that the second end 512 of first heat exchange module 51 is communicated with first access 11, second access 12 is communicated with the third end 521 of second heat exchange module 52, first heat exchange module 51 and second heat exchange module 52 are used as the component parts of outdoor heat exchanger 5, are arranged on the same side of the shell 14 of gas-liquid separator 1, first access 11 and second access 12 all face one side of shell 14, first access 11 and second access 12 all extend along horizontal direction, and the extension direction of first access 11 is parallel to the extension direction of second access 12, which facilitates the communication of first access 11 and first heat exchange module 51. It is convenient to realize the communication of second access 12 and second heat exchange module 52, and increase the convenience of the connection of gas-liquid separator 1 and heat exchange system 100.

[0065] In some embodiments of the utility model, the distance between second access 12 and the bottom wall of shell 14 is less than the distance between second access 12 and the top wall of shell 14. That is, second access 12 is closer to the bottom wall of shell 14 relative to the top wall of shell 14. In the heating mode, the heat exchange medium in gas-liquid mixed state enters gas-liquid separator 1 through second access 12, and enters along the tangential direction of the inner wall of the shell 14 of gas-liquid separator 1, forms a cyclone on the inner wall of the shell 14 of gas-liquid separator 1, separates the gaseous heat exchange medium and the liquid heat exchange medium, ensures the gas-liquid separation effect of gas-liquid separator 1, and when the gaseous heat exchange medium transpires towards the top wall of shell 14, the residual liquid heat exchange medium can continue to slide to the bottom wall of shell 14 under the action of gravity, further avoiding the heat exchange medium in gas-liquid mixed state from flowing out of gas-liquid separator 1 directly through first access 11 after entering gas-liquid separator 1, avoiding the heat exchange medium in gas-liquid mixed state from entering first heat exchange module 51 directly through first access 11, avoiding affecting the heat exchange effect of outdoor heat exchanger 5, and improving the heating capacity of air conditioner in the heating mode.

[0066] In some embodiments of the utility model, the height of the shell 14 is 170mm-220mm, and the diameter of the shell 14 is 80mm-100mm. It can be understood that the height of the shell 14 can be 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, 200mm, 205mm, 210mm, 215mm or 220mm; the diameter of the shell 14 can be 80mm, 82mm, 84mm, 86mm, 88mm, 90mm, 92mm, 94mm, 96mm, 98mm or 100mm. The size of the shell 14 can be selected according to the flow of the heat exchange medium in the heat exchange system 100 and the space where the gas-liquid separator 1 can be arranged, so as to meet different use requirements.

[0067] In some embodiments of the utility model, the distance between the center of the first inlet and outlet 11 and the center of the shell 14 is 20mm-30mm, and the distance between the center of the second inlet and outlet 12 and the center of the shell 14 is 20mm-30mm. It can be understood that the distance between the center of the first inlet and outlet 11 and the center of the shell 14 can be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm or 30mm; the distance between the center of the second inlet and outlet 12 and the center of the shell 14 can be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm or 30mm. The positions of the first inlet and outlet 11 and the second inlet and outlet 12 can be selected according to the flow of the gas-liquid mixed heat exchange medium entering the inside of the gas-liquid separator 1 from the first inlet and outlet 11, so as to meet different use requirements.

[0068] In some embodiments of the utility model, the distance between the center of the first inlet and outlet 11 and the bottom wall of the shell 14 is 35mm-75mm. It can be understood that the distance between the center of the first inlet and outlet 11 and the bottom wall of the shell 14 can be 35mm, 37mm, 39mm, 41mm, 43mm, 45mm, 47mm, 49mm, 51mm, 53mm, 55mm, 57mm, 59mm, 61mm, 63mm, 65mm, 67mm, 69mm, 71mm, 73mm or 75mm. The position of the first inlet and outlet 11 can be selected according to the flow of the gas-liquid mixed heat exchange medium entering the inside of the gas-liquid separator 1 from the first inlet and outlet 11, so as to meet different design requirements.

[0069] In some embodiments of this utility model, the vertical distance between the center of the second entrance / exit 12 and the center of the first entrance / exit 11 is 15mm-25mm. It can be understood that the vertical distance between the center of the second entrance / exit 12 and the center of the first entrance / exit 11 can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, or 25mm. That is, along such... Figure 1 As shown in the vertical direction, the second inlet / outlet 12 is located above the first inlet / outlet 11 and is 15mm-25mm apart. This creates a certain distance between the second inlet / outlet 12 and the first inlet / outlet 11 in the direction from the top wall to the bottom wall of the housing 14. This facilitates the entry of the gas-liquid mixed heat exchange medium tangentially along the inner wall of the housing 14 of the gas-liquid separator 1, forming a swirling flow on the inner wall of the housing 14 of the gas-liquid separator 1. This facilitates the separation of the gaseous and liquid heat exchange media, ensuring the gas-liquid separation effect of the gas-liquid separator 1. In heating mode, this prevents the gas-liquid mixed heat exchange medium from entering the gas-liquid separator 1 and directly flowing out of the gas-liquid separator 1 from the first inlet / outlet 11, and prevents the gas-liquid mixed heat exchange medium from directly entering the first heat exchange module 51 through the first inlet / outlet 11, thus avoiding affecting the heat exchange effect of the outdoor heat exchanger 5.

[0070] In this embodiment, the housing 14 of the gas-liquid separator 1 is a cylindrical housing 14. Connecting pipes are provided at the first inlet / outlet 11, the second inlet / outlet 12 and the outlet 13. The diameter of the housing 14 is 76 mm, the height of the housing 14 is 150 mm, the diameter of the first inlet / outlet 11 is 12.7 mm, the diameter of the second inlet / outlet 12 is 15.9 mm, and the diameter of the outlet 13 is 15.9 mm.

[0071] The air conditioner according to an embodiment of the present invention includes the heat exchange system 100 described above.

[0072] According to the embodiment of the present invention, an air conditioner is provided with a gas-liquid separator 1 between the first heat exchange module 51 and the second heat exchange module 52 of the outdoor heat exchanger 5. The second end 512 of the first heat exchange module 51 is connected to the first inlet / outlet 11 of the gas-liquid separator 1, the second inlet / outlet 12 of the gas-liquid separator 1 is connected to the third end 521 of the second heat exchange module 52, and the outlet 13 of the gas-liquid separator 1 is connected to one end of the indoor heat exchanger 4. The ratio A of the number of heat exchange tubes in the second heat exchange module 52 to the number of heat exchange tubes in the outdoor heat exchanger 5 satisfies: 2≤A≤9. The outdoor heat exchanger 5 has a better heat exchange effect when it acts as an evaporator in the heating mode, and can avoid affecting the reduced heat exchange effect when it acts as a condenser in the cooling process. At the same time, it improves the heat exchange effect of the outdoor heat exchanger 5 in both the cooling and heating modes.

[0073] Other configurations and operations of the heat exchange system 100 and the air conditioner having the same according to the embodiments of the present application are known to those of ordinary skill in the art, and thus will not be described in detail herein.

[0074] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the following claims and their equivalents.

Claims

1. A heat exchange system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A four-way valve having a first port, a second port, a third port, and a fourth port, wherein the first port is connected to one of the second port and the third port, the fourth port is connected to the other of the second port and the third port, the first port is connected to the exhaust port, and the fourth port is connected to the return port. An indoor heat exchanger, one end of which is connected to the third port; An outdoor heat exchanger includes a first heat exchange module and a second heat exchange module. The first heat exchange module has two ends, a first end and a second end, with the first end connected to a second port. The second heat exchange module has two ends, a third end and a fourth end, with the fourth end connected to the other end of the indoor heat exchanger. The ratio A of the number of heat exchange tubes in the second heat exchange module to the number of heat exchange tubes in the outdoor heat exchanger satisfies: 16.7% ≤ A ≤ 35%. A gas-liquid separator having a first inlet / outlet, a second inlet / outlet, and a gas outlet, wherein the second end is connected to the first inlet / outlet, the second inlet / outlet is connected to the third end, and the gas outlet is connected to the second outlet.

2. The heat exchange system according to claim 1, characterized in that, A first flow path is connected between the air outlet and the second port. A first one-way valve is provided on the first flow path, which only allows the heat exchange medium to flow from the air outlet to the second port.

3. The heat exchange system according to claim 1, characterized in that, The first heat exchange module includes multiple parallel first heat exchange flow paths; And / or, the second heat exchange module includes multiple parallel second heat exchange flow paths.

4. The heat exchange system according to claim 3, characterized in that, Also includes: The first liquid separation device has one end connected to the first inlet and outlet, and the other end connected to multiple first heat exchange flow paths.

5. The heat exchange system according to claim 3, characterized in that, Also includes: The second liquid separator has one end connected to the second inlet and outlet, and the other end connected to multiple second heat exchange channels.

6. The heat exchange system according to claim 3, characterized in that, The cross-sections of the plurality of first heat exchange flow paths are N-shaped and / or inverted N-shaped; the cross-sections of the plurality of second heat exchange flow paths are N-shaped and / or U-shaped; wherein the cross-sections are perpendicular to the axial direction of the heat exchange tube.

7. The heat exchange system according to claim 1, characterized in that, A throttling device is provided between the fourth end and the indoor heat exchanger.

8. The heat exchange system according to claim 1, characterized in that, The ratio A of the number of heat exchange tubes in the second heat exchange module to the number of heat exchange tubes in the outdoor heat exchanger satisfies: 25% ≤ A ≤ 30%.

9. The heat exchange system according to claim 1, characterized in that, The gas-liquid separator includes: The housing has an air outlet located on the top wall of the housing, and both the first inlet and the second inlet are located near the bottom wall of the housing.

10. An air conditioner, characterized in that, Includes the heat exchange system according to any one of claims 1-9.

Images