Heat exchange system

Abstract

The invention discloses a heat exchange system which comprises a condenser provided with a first heat exchange element, an evaporator provided with a second heat exchange element and at least two sets of circulation assemblies used for circulation of refrigerants, and each set of circulation assembly comprises a first pipe row, a second pipe row and a circulation pipe communicated with the first pipe row and the second pipe row. All the first tube rows are arranged in the condenser, all the second tube rows are arranged in the evaporator, and the first heat exchange element makes contact with at least two first tube rows and / or the second heat exchange element makes contact with at least two second tube rows. During low-load operation, a group of circulating assemblies in contact with the first heat exchange element and / or the second heat exchange element is stopped, other first pipe rows sharing the first heat exchange element are still in contact with the first heat exchange element for heat release, and other second pipe rows sharing the second heat exchange element are still in contact with the second heat exchange element for heat absorption; and the problem that the overall heat exchange area is greatly reduced during low-load operation can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical refrigeration, and in particular to a heat exchange system. Background Art

[0002] Heat exchange systems are widely used in equipment and facilities in the fields of petrochemicals, semiconductors, construction and data centers. In order to better adapt to changes in load, data center computer room air conditioners often use large-capacity air conditioners. The heat exchange system in the large-capacity air conditioner is a multi-system design, which absorbs heat through multiple evaporators indoors and releases heat through multiple condensers outdoors to maintain a certain temperature range in the data center computer room.

[0003] In the process of implementing the present application, the inventors found that the prior art has at least the following problems: multiple heat exchange systems are often used in combination to adapt to load changes, and the condenser and evaporator in each heat exchange system are independently configured. When operating at low load, one or more of the heat exchange systems stops operating, and the corresponding condenser and evaporator also stops exchanging heat, resulting in a significant reduction in the overall heat exchange area, affecting the heat exchange efficiency.

[0004] Therefore, how to provide a heat exchange system to improve the above disadvantages is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a heat exchange system that can effectively avoid the problem of a significant reduction in the overall heat exchange area during low-load operation, thereby improving the heat exchange efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides a heat exchange system, comprising a condenser provided with a first heat exchange element, an evaporator provided with a second heat exchange element, and at least two groups of circulation components for circulating refrigerant, each group of circulation components comprising a first tube row, a second tube row, and a circulation pipe connected to the first tube row and the second tube row, all the first tube rows are arranged in the condenser, all the second tube rows are arranged in the evaporator, the first heat exchange element is in contact with at least two groups of first tube rows and / or the second heat exchange element is in contact with at least two groups of second tube rows.

[0007] In one possible design, the first tube rows include a first diverter tube, a first converging tube and a plurality of first branch tubes. The first diverter tube is connected to one end of all the first branch tubes in the same first tube row, and the first converging tube is connected to the other end of all the first branch tubes in the same first tube row.

[0008] In one possible design, the second tube rows include second diverter tubes, second converging tubes and a plurality of second branch pipes. The second diverter tubes are connected to one end of all the second branch pipes in the same second tube row, and the second converging tubes are connected to the other end of all the second branch pipes in the same second tube row.

[0009] In a possible design, all first branch pipelines in the same first pipe row are spaced apart from each other, and first branch pipelines in different first pipe rows are staggered; and / or,

[0010] All the second branch pipelines in the same second pipe row are spaced apart from each other, and the second branch pipelines in different second pipe rows are staggered.

[0011] In a possible design, the first branch pipelines in the same first pipe row extend in parallel and the distances between adjacent first branch pipelines are equal; and / or,

[0012] The second branch pipelines in the same second pipe row extend in parallel and the distances between adjacent second branch pipelines are equal.

[0013] In one possible design, the circulation tube includes a first circulation tube and a second circulation tube, the first circulation tube is connected to the outlet of the first tube row and the inlet of the second tube row, so that the refrigerant flows from the first tube row to the second tube row, and the second circulation tube is connected to the outlet of the second tube row and the inlet of the first tube row, so that the refrigerant discharged through the second tube row flows to the first tube row.

[0014] In a possible design, all first flow tubes are arranged on the same side relative to the condenser and / or the evaporator; and / or,

[0015] All the second flow tubes are arranged on the same side relative to the condenser and / or the evaporator.

[0016] In a possible design, the circulation component is also provided with a liquid storage tank capable of storing refrigerant liquid, and the first circulation pipe includes a first circulation section and a second circulation section, the first circulation section is connected to the outlet of the first tube row and the inlet of the liquid storage tank, the second circulation section is connected to the outlet of the liquid storage tank and the inlet of the second tube row, and the second circulation section is provided with a first one-way valve for controlling the flow direction of the refrigerant liquid and a throttling element for controlling the flow rate of the refrigerant liquid.

[0017] In one possible design, the circulation component is also provided with a compressor for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas. The second flow pipe includes a third flow section and a fourth flow section. The third flow section is connected to the outlet of the second tube row and the inlet of the compressor, and the fourth flow section is connected to the outlet of the compressor and the inlet of the first tube row.

[0018] In a possible design, the second flow section is further provided with a fluorine pump connected in parallel with the first one-way valve; and / or,

[0019] The second flow pipe is also provided with a second one-way valve connected in parallel with the compressor.

[0020] Compared with the prior art, the heat exchange system provided by the present invention has at least the following beneficial effects:

[0021] At least two groups of first tube rows arranged in the condenser share a first heat exchange element, and at least two groups of second tube rows arranged in the evaporator share a second heat exchange element. The corresponding first tube rows and second tube rows are connected by a group of circulation pipes to form a group of circulation components for the flow of refrigerant. When operating at low load, a group of circulation components contacting the first heat exchange element and / or contacting the second heat exchange element is stopped, that is, the circulation of a group of first tube rows sharing the first heat exchange element and / or the circulation of a group of second tube rows sharing the second heat exchange element is stopped, and the other first tube rows sharing the first heat exchange element are still in contact with the first heat exchange element to release heat, and the other second tube rows sharing the second heat exchange element are still in contact with the second heat exchange element to absorb heat, which can avoid the problem of a significant reduction in the overall heat exchange area during low load operation, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a heat exchange system provided by an embodiment of the present invention;

[0024] Figure 2 A schematic structural diagram of a first tube row provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of a second tube row provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic structural diagram of a first heat exchange element shared by a first tube row provided in an embodiment of the present invention.

[0027] in:

[0028] 100 - condenser, 110 - fan, 120 - first heat exchange element;

[0029] 200-evaporator;

[0030] 300 - first pipe row, 310 - first flow distribution pipe, 320 - first flow confluence pipe, 330 - first branch pipeline;

[0031] 400 - second pipe row, 410 - second flow distribution pipe, 420 - second confluence pipe, 430 - second branch pipeline;

[0032] 511-first flow section, 512-second flow section, 521-third flow section, 522-fourth flow section, 530-first check valve, 540-throttling element, 550-compressor, 560-fluorine pump, 570-second check valve;

[0033] 600-Fluid storage tank. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] In the description of the present invention, it should be understood that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0037] The object of the present invention is to provide a heat exchange system that can avoid the problem of a significant reduction in the overall heat exchange area during low-load operation, thereby improving the heat exchange efficiency.

[0038] See also Figure 1 To achieve the above-mentioned purpose, the present invention provides a heat exchange system, comprising a condenser 100 provided with a first heat exchange element 120, an evaporator 200 provided with a second heat exchange element, and at least two groups of circulation components for circulating refrigerant, each group of circulation components comprising a first tube row 300, a second tube row 400, and a flow pipe connected to the first tube row 300 and the second tube row 400, all the first tube rows 300 are arranged in the condenser 100, all the second tube rows 400 are arranged in the evaporator 200, the first heat exchange element 120 is in contact with at least two groups of first tube rows 300 and / or the second heat exchange element is in contact with at least two groups of second tube rows 400.

[0039] At least two groups of first tube rows 300 arranged in the condenser 100 share the first heat exchange element 120, and at least two groups of second tube rows 400 arranged in the evaporator 200 share the second heat exchange element. The corresponding first tube rows 300 and second tube rows 400 are connected through a group of circulation pipes to form a group of circulation components for refrigerant flow. When the refrigerant is operated at a low load, a group of circulation components contacting the first heat exchange element 120 and / or contacting the second heat exchange element is stopped, that is, the circulation of the group of first tube rows 300 sharing the first heat exchange element 120 is stopped and / or the circulation of the group of second heat exchange elements sharing the second heat exchange element is stopped. A group of second tube rows 400 of the element circulates, the other first tube rows 300 sharing the first heat exchange element 120 are still in contact with the first heat exchange element 120 to release heat, and the other second tube rows 400 sharing the second heat exchange element are still in contact with the second heat exchange element to absorb heat, which can avoid the problem of a significant reduction in the overall heat exchange area during low-load operation, thereby improving the heat exchange efficiency. In addition, when one group of circulation components is damaged, the other circulation components can still continue to absorb heat through the evaporator 200 and release heat through the condenser 100, avoiding failure of the entire heat exchange system.

[0040] The first heat exchange element 120 and the second heat exchange element are specifically fins. The fins can adopt a plate-like structure. The fins are connected to at least two groups of first tube rows 300 or at least two groups of second tube rows 400. A plurality of through holes adapted to the first tube rows 300 or the second tube rows 400 are opened on the fins, so that at least two groups of first tube rows 300 are provided with corresponding through holes and then contact the first heat exchange element 120 composed of a plurality of fins, so that the refrigerant in the first tube row 300 releases heat through the fins in the first heat exchange element 120 to reduce the temperature of the refrigerant, and at least two groups of second tube rows 400 are provided with corresponding through holes and then contact the second heat exchange element composed of a plurality of fins, so that the refrigerant in the second tube row 400 absorbs heat through the fins in the second heat exchange element to reduce the temperature of the heat source. The number and layout of the fins in the first heat exchange element 120 and the second heat exchange element can be adjusted according to actual needs to achieve a better heat transfer effect.

[0041] In addition, the condenser 100 and the evaporator 200 both include a fan 110, which is used to drive the gas to flow to the surface of the first heat exchange element 120 or the second heat exchange element, that is, the fan 110 is used to drive the gas to flow to the surface of the corresponding fin, and the fan 110 realizes forced convection heat exchange between the first heat exchange element 120 or the second heat exchange element and the ambient gas. Specifically, the fan 110 of the condenser 100 is used to blow air for the first tube row 300 to dissipate heat. The fan 110 of the condenser 100 It is used to accelerate the flow of air in the first tube row 300 and the fin surface in contact with the first tube row 300, and to quickly dissipate the heat of the refrigerant in the first tube row 300 to reduce the temperature of the refrigerant; the fan 110 of the evaporator 200 is used to exchange heat between the second tube row 400 and the environment. The fan 110 of the evaporator 200 is used to accelerate the flow of air to the second tube row 400 and the fin surface in contact with the second tube row 400, so that the air quickly exchanges heat with the refrigerant in the second tube row 400, and is used to cool the heat source.

[0042] It should be noted that the first heat exchange element 120 of the condenser 100 and the second heat exchange element 120 of the evaporator 200 are shared by two or more sets of circulation components. Each set of circulation components constitutes a condenser of the circulation component through the first tube row 300 and the first heat exchange element 120 in contact with the first tube row 300 for cooling the refrigerant. Each set of circulation components constitutes an evaporator of the circulation component through the second tube row 400 and the second heat exchange element in contact with the second tube row 400 for cooling the heat source. Except for the first heat exchange element 120, the second heat exchange element and the fan 110 for driving the gas circulation, the other components of each circulation component are independently arranged. Figure 1 In the figure, two sets of circulation components share the first heat exchange element 120, the second heat exchange element and the fan 110 for driving the gas flow. Multiple sets of circulation components can be used, which will not be repeated here.

[0043] See also Figure 2 and Figure 4In one embodiment, the first pipe row 300 includes a first shunt pipe 310, a first confluence pipe 320 and a plurality of first branch pipes 330. The first shunt pipe 310 is connected to one end of all the first branch pipes 330 in the same first pipe row 300, and the first confluence pipe 320 is connected to the other end of all the first branch pipes 330 in the same first pipe row 300. The first pipe row 300 is divided into a plurality of first branch pipes 330. The refrigerant is diverted to the first branch pipes 330 through the first shunt pipe 310, and the refrigerant with a lowered temperature after flowing through the first branch pipes 330 is concentrated through the first confluence pipe 320. The first branch pipes 330 can be located at different positions of the first heat exchange element 120, thereby improving the contact effect between the first pipe row 300 and the first heat exchange element 120, thereby improving the heat dissipation effect of the refrigerant in the first pipe row 300. The number of first branch pipes 330 in the first pipe row 300 can be adjusted according to actual needs, which is not specifically limited here.

[0044] Furthermore, all the first branch pipes 330 in the same first pipe row 300 are spaced apart from each other. By separating the first branch pipes 330 in the first pipe row 300, space is provided for the air to circulate between adjacent first branch pipes 330, so that the heat exchange effect between the air and the refrigerant in the first branch pipes 330 can be improved. The first branch pipes 330 in different first pipe rows 300 are staggered with each other, so that different first pipe rows 300 can be arranged at various positions of the first heat exchange element 120, so as to avoid the problem that the same first pipe row 300 is concentrated in a specific area of ​​the first heat exchange element 120 and the heat exchange effect is limited. The first branch pipes 330 in the same first pipe row 300 extend in parallel and the distances between adjacent first branch pipes 330 are equal, so that the first branch pipes 330 in the first pipe row 300 are arranged regularly. For example, when the first pipe row 300 is divided into two groups, and each group of the first pipe row 300 includes two first branch pipes When the first tube rows 300 are divided into three groups (the three groups of first tube rows 300 are numbered A, B, and C, respectively), and the number of first branch pipelines 330 in each group of first tube rows 300 is three (the three first branch pipelines 330 in the same first tube row 300 are numbered 1, 2, and 3, respectively), all the first branch pipelines 330 can be evenly arranged from top to bottom on the first heat exchange element 120 as A1, B1, C1, A2, B2, C2, A3, B3, and C3, so that the first branch pipelines 330 in each group of first tube rows 300 are distributed in different areas on the first heat exchange element 120. When two groups of first tube rows 300 are not in use or damaged, the other group of first tube rows 300 can still use the first heat exchange element 120 to produce a better heat exchange effect, thereby avoiding the phenomenon of hot air channeling around the unused or damaged first tube rows 300.

[0045] See also Figure 3 In one embodiment, the second pipe row 400 includes a second diverter pipe 410, a second concentrator pipe 420 and a plurality of second branch pipes 430. The second diverter pipe 410 is connected to one end of all the second branch pipes 430 in the same second pipe row 400, and the second concentrator pipe 420 is connected to the other end of all the second branch pipes 430 in the same second pipe row 400, so that the second pipe row 400 is divided into a plurality of second branch pipes 430. The refrigerant is diverted to the second branch pipes 430 through the second diverter pipe 410, and the refrigerant that absorbs heat after circulating through the second branch pipes 430 is concentrated through the second concentrator pipe 420, so that the second branch pipes 430 can be located at different positions of the second heat exchange element, thereby improving the contact effect between the second pipe row 400 and the second heat exchange element, thereby improving the heat absorption effect of the refrigerant in the second pipe row 400, and better cooling the heat source. The number of second branch pipes 430 in the second pipe row 400 can be adjusted according to actual needs, which is not specifically limited here.

[0046] Furthermore, all the second branch pipes 430 in the same second pipe row 400 are spaced apart from each other. By separating the second branch pipes 430 in the second pipe row 400, space is provided for the circulation of air between adjacent second branch pipes 430, so that the heat exchange effect between the air and the refrigerant in the second branch pipes 430 can be improved. The second branch pipes in different second pipe rows 400 are arranged in an interlaced manner, so that different second pipe rows 400 can be arranged at various positions of the second heat exchange element, so as to avoid the problem of limited heat exchange effect caused by the same second pipe row 400 being concentrated in a specific area of ​​the second heat exchange element. The second branch pipes 430 in the same second pipe row 400 extend in parallel and are adjacent to each other. The distances between the second branch pipes 430 are equal. For example, when the second tube rows 400 are divided into two groups, and each group of the second tube rows 400 includes two second branch pipes 430, the second branch pipes 430 in the two groups of the second tube rows 400 can be staggered so that the second branch pipes 430 in the second tube rows 400 are arranged regularly. The second branch pipes 430 in each second tube row 400 are distributed in different areas on the second heat exchange element. When some of the second tube rows 400 are not used or damaged, the remaining second tube rows 400 can still use the second heat exchange element to produce a better heat exchange effect, thereby avoiding the phenomenon of hot air leakage around the unused or damaged second tube rows 400.

[0047] In one embodiment, the circulation pipe includes a first circulation pipe and a second circulation pipe. The first circulation pipe is connected to the outlet of the first tube row 300 and the inlet of the second tube row 400 so as to allow the refrigerant to flow from the first tube row 300 to the second tube row 400. The second circulation pipe is connected to the outlet of the second tube row 400 and the inlet of the first tube row 300 so as to allow the refrigerant discharged from the second tube row 400 to flow to the first tube row 300. In this way, the circulation of the refrigerant in a group of circulation components is realized. The refrigerant flowing to the second tube row 400 absorbs heat through the second heat exchange element and is converted into refrigerant gas. Then, the refrigerant flows to the first tube row 300 to be blown and dissipated by air, so that the refrigerant gas is converted into refrigerant liquid. Then, the refrigerant liquid flows back to the second tube row 400 for heat exchange.

[0048] Furthermore, all the first flow tubes may be arranged on the same side relative to the condenser 100 and / or the evaporator 200; and / or, all the second flow tubes may be arranged on the same side relative to the condenser 100 and / or the evaporator 200, so that the first flow tubes and the second flow tubes in the multiple groups of circulation components can be neatly arranged, reducing the occupied space of the heat exchange system, and at the same time reducing excessive heat exchange between the refrigerant and the environment when flowing in different first flow tubes. Specifically, when there is only one first flow tube in a specific area, the refrigerant in the first flow tube will lose cold energy during heat exchange with the environment when flowing. At this time, the ambient temperature increases accordingly. When a second first flow tube is added under this environment, the cold energy lost by the second first flow tube in heat exchange with the environment will be reduced, which is beneficial to reducing the cold energy loss of the entire heat exchange system.

[0049] Among them, the circulation component is also provided with a liquid storage tank 600 capable of storing refrigerant liquid, the first circulation pipe includes a first circulation section 511 and a second circulation section 512, the first circulation section 511 is connected to the outlet of the first tube row 300 and the inlet of the liquid storage tank 600, the second circulation section 512 is connected to the outlet of the liquid storage tank 600 and the inlet of the second tube row 400, the second circulation section 512 is provided with a first one-way valve 530 for controlling the flow direction of the refrigerant liquid and a throttling element 540 for controlling the flow rate of the refrigerant liquid, the circulation component is also provided with a compressor 550 for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas, the second circulation pipe includes a third circulation section 521 and a fourth circulation section 522, the third circulation section 521 is connected to the outlet of the second tube row 400 and the inlet of the compressor 550, and the fourth circulation section 522 is connected to the outlet of the compressor 550 and the inlet of the first tube row 300.

[0050] When the circulation assembly is in operation, the compressor 550 outputs refrigerant into the condenser 100 for condensation, for example, high-temperature and high-pressure refrigerant gas can be output, and enters the first tube row 300 along the fourth flow section 522 to be condensed in the condenser 100. The condensed refrigerant (for example, medium-temperature and high-pressure refrigerant liquid) enters the liquid storage tank 600 along the first flow section 511 for cooling, and the cooled refrigerant enters the second tube row 400 after throttling and reducing pressure along the second flow section 512, and then cools and dissipates heat to the target device in the evaporator 200. Specifically, the throttling element 540 throttles the refrigerant output from the liquid storage tank 600 into a low-temperature and low-pressure gas-liquid mixture (or refrigerant liquid), and the throttled refrigerant enters the second tube row 400 and absorbs heat and evaporates into a low-temperature and low-pressure refrigerant gas, and returns to the compressor 550 along the third flow section 521 to continue circulating.

[0051] In some application scenarios, after the compressor 550 stops running, since the temperature and pressure in the second pipe row 400 are lower than those in other pipes, the refrigerant in the high-pressure pipe migrates to the low-pressure pipe through the throttling element 540. In order to effectively overcome the above problems, the throttling element 540 includes a solenoid valve and a throttling valve connected in series, so that after the compressor 550 stops running, the solenoid valve and the throttling valve can be controlled to close, effectively preventing the refrigerant in the high-pressure pipe from migrating to the low-pressure pipe through the throttling element 540, such as the refrigerant liquid stored in the liquid storage tank 600 flowing into the second pipe row 400, and further ensuring that the refrigerant liquid in front of the throttling element 540 is sufficient when the compressor 550 is started again, so that sufficient cooling capacity output can be provided. By using a solenoid valve with good shut-off performance in combination with a general throttling valve, while fully maintaining the fast start-up characteristics, it can also effectively ensure that the system is accidentally powered off and the high and low pressure pipes are cut off in time, reducing the risk caused by refrigerant migration. It can be understood that the throttling valve can include an electronic expansion valve or a capillary tube or a thermal expansion valve.

[0052] In one embodiment, a fluorine pump 560 connected in parallel with the first one-way valve 530 is further provided on the second flow section 512, and a second one-way valve 570 connected in parallel with the compressor 550 is further provided on the second flow pipe, so that the heat exchange system is divided into a compressor 550 mode and a fluorine pump 560 mode. When the outdoor temperature is high in summer and transitional seasons, the compressor 550 mode is operated, and the evaporator 200 exchanges heat with the indoor air under the action of the fan 110, absorbs the indoor air temperature, and the low-temperature and low-pressure gas-liquid two-phase refrigerant inside the evaporator 200 is converted into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas passes through the third flow section 521 and is compressed by the compressor 550 to become a high-temperature and high-pressure refrigerant gas. The circulation section 522 enters the outdoor condenser 100, and exchanges heat with the outdoor air under the action of the fan 110 to release heat into the outdoor air. After releasing heat, it becomes a high-temperature and high-pressure refrigerant liquid, flows to the liquid storage tank 600 through the first circulation section 511, and passes through the second circulation section 512, passes through the first one-way valve 530, and is throttled and reduced in pressure by the throttling element 540 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant, and then enters the evaporator 200 to continue to absorb heat from the indoor air, and this cycle continues. When the outdoor air temperature is low in winter, the fluorine pump 560 mode is operated, the compressor 550 is shut down, and the refrigerant bypasses the compressor 550 and passes through the second one-way valve 570 in parallel with the compressor 550 to realize the refrigeration cycle.

[0053] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A heat exchange system, characterized in that: The invention comprises a condenser (100) provided with a first heat exchange element (120), an evaporator (200) provided with a second heat exchange element, and at least two groups of circulation components for circulating a refrigerant, each group of the circulation components comprising a first tube row (300), a second tube row (400), and a circulation pipe connected to the first tube row (300) and the second tube row (400), all of the first tube rows (300) are arranged in the condenser (100), all of the second tube rows (400) are arranged in the evaporator (200), the first heat exchange element (120) is in contact with at least two groups of the first tube rows (300) and / or the second heat exchange element is in contact with at least two groups of the second tube rows (400).

2. The heat exchange system according to claim 1, characterized in that: The first tube row (300) comprises a first flow distribution pipe (310), a first flow converging pipe (320) and a plurality of first branch pipes (330); the first flow distribution pipe (310) is connected to one end of all the first branch pipes (330) in the same first tube row (300); and the first flow converging pipe (320) is connected to the other end of all the first branch pipes (330) in the same first tube row (300).

3. The heat exchange system according to claim 2, characterized in that: The second tube row (400) comprises a second flow distribution pipe (410), a second flow converging pipe (420) and a plurality of second branch pipes (430); the second flow distribution pipe (410) is connected to one end of all the second branch pipes (430) in the same second tube row (400); and the second flow converging pipe (420) is connected to the other end of all the second branch pipes (430) in the same second tube row (400).

4. The heat exchange system according to claim 3, characterized in that: All the first branch pipelines (330) in the same first tube row (300) are spaced apart from each other, and the first branch pipelines (330) in different first tube rows (300) are staggered; and / or, All the second branch pipelines (430) in the same second tube row (400) are spaced apart from each other, and the second branch pipelines (430) in different second tube rows (400) are arranged in an alternating manner.

5. The heat exchange system according to claim 3, characterized in that: The first branch pipelines (330) in the same first pipe row (300) extend in parallel and the distances between adjacent first branch pipelines (330) are equal; and / or, The second branch pipelines (430) in the same second pipe row (400) extend in parallel and the distances between adjacent second branch pipelines (430) are equal.

6. The heat exchange system according to any one of claims 1 to 5, characterized in that: The circulation pipe comprises a first circulation pipe and a second circulation pipe, wherein the first circulation pipe is connected to the outlet of the first tube row (300) and the inlet of the second tube row (400) so as to allow the refrigerant to flow from the first tube row (300) to the second tube row (400), and the second circulation pipe is connected to the outlet of the second tube row (400) and the inlet of the first tube row (300) so as to allow the refrigerant discharged through the second tube row (400) to flow to the first tube row (300).

7. The heat exchange system according to claim 6, characterized in that: All of the first flow tubes are arranged on the same side relative to the condenser (100) and / or the evaporator (200); and / or, All of the second flow tubes are arranged on the same side relative to the condenser (100) and / or the evaporator (200).

8. The heat exchange system according to any one of claims 1 to 5, characterized in that: The circulation component is also provided with a liquid storage tank (600) capable of storing refrigerant liquid. The first circulation pipe includes a first circulation section (511) and a second circulation section (512). The first circulation section (511) is connected to the outlet of the first tube row (300) and the inlet of the liquid storage tank (600). The second circulation section (512) is connected to the outlet of the liquid storage tank (600) and the inlet of the second tube row (400). The second circulation section (512) is provided with a first one-way valve (530) for controlling the flow direction of the refrigerant liquid and a throttling element (540) for controlling the flow rate of the refrigerant liquid.

9. The heat exchange system according to claim 8, characterized in that: The circulation component is also provided with a compressor (550) for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas. The second circulation pipe includes a third circulation section (521) and a fourth circulation section (522). The third circulation section (521) is connected to the outlet of the second tube row (400) and the inlet of the compressor (550), and the fourth circulation section (522) is connected to the outlet of the compressor (550) and the inlet of the first tube row (300).

10. The heat exchange system according to claim 9, characterized in that: The second flow section (512) is further provided with a fluorine pump (560) connected in parallel with the first one-way valve (530); and / or, The second flow pipe is also provided with a second one-way valve (570) connected in parallel with the compressor (550).

Images