Heat exchange unit

Abstract

The invention discloses a heat exchange unit which comprises a rack, a heat exchange core body, an outdoor fan module and an indoor fan module. A first layer of space, a second layer of space and a third layer of space are arranged in the rack; the heat exchange core body is connected between the second-layer space and the third-layer space; the third-layer space is divided into an indoor air inlet cavity and an outdoor air outlet cavity in the second direction; the second-layer space is divided into an outdoor air inlet cavity and an indoor air outlet cavity in the second direction; an air return port is formed in one end of the indoor air inlet cavity in the third direction; the first direction span of the third layer space is larger than the first direction span of the second layer space. The heat exchange unit can effectively solve the problem that the indoor air and outdoor air ventilation area balancing effect of the heat exchange core is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control equipment, and more specifically, to a heat exchange unit. Background Art

[0002] In the air-conditioning system, in order to better achieve energy saving and ensure the requirements of air volume, an integrated heat exchanger unit will be set up, which can also be called an air-conditioning unit.

[0003] For example, Chinese patent publication number CN221648804U discloses a heat exchanger main unit which mainly includes a frame, a heat exchange core, an outdoor fan module, an indoor fan module, an evaporator and a condenser.

[0004] A three-layer space structure is formed inside the rack, which is the first space, the second space, and the third space from bottom to top. The heat exchange core spans the second space and the third space, with half of it located in the second space and the other half in the third space. In the heat exchange core, an outdoor wind channel and an indoor wind channel are formed. The indoor wind channel flows from top to bottom, and the outdoor wind flows from bottom to top. Heat exchange can be achieved in the process of the two crossing through the heat exchange core. In order to ensure the air exchange volume, the heat exchange core needs to be extended longitudinally. The longitudinal extension size is generally significantly larger than the size of the heat exchange core in the outdoor wind inlet direction, and also significantly larger than the size of the heat exchange core in the indoor wind inlet direction, that is, it is set perpendicular to the direction of the indoor wind inlet and the direction of the outdoor wind inlet.

[0005] The two heat exchange cores are arranged in parallel horizontally so that the indoor air inlets can converge relatively and the outdoor air outlets can converge relatively. This makes the third-layer space: an outdoor air outlet cavity is formed in the horizontal middle to collect the outdoor air outlets of the two heat exchange cores; and indoor air inlet cavities are formed on both sides to correspond to the indoor air inlets of the two heat exchange cores. The condenser is placed in the outdoor air outlet cavity so that the outdoor air can pass through the condenser again after passing through the heat exchange core to cool the condenser. An outdoor fan module is set at the top of the third-layer space to supply air upward.

[0006] Similarly, in the second layer of space, an indoor air outlet cavity is formed in the middle of the horizontal direction to collect the indoor air outlet of the two heat exchange cores; and outdoor air inlet cavities are formed on both sides of the horizontal direction to correspond to the outdoor air inlet of the two heat exchange cores. The evaporator is placed in the indoor air outlet cavity, so that the indoor air can pass through the evaporator again after passing through the heat exchange core, so that the indoor air can be further cooled. An indoor air fan module is set at the top of the first layer of space to send the air in the indoor air outlet cavity into the first layer of space, and then the first layer of space transfers the air to the outdoor air outlet.

[0007] In the process of realizing the invention, the inventors found that there are at least the following problems in the prior art: in actual applications, the first layer space, the second layer space and the third layer space are generally set at the same height to obtain a better support effect, but this setting method easily leads to the ventilation volume of each layer not achieving an overall balanced effect, that is, the ventilation area balance effect of indoor wind and outdoor wind of the heat exchange core is not good. Summary of the invention

[0008] In view of this, an object of the present invention is to provide a heat exchange unit, which can effectively solve the problem of poor ventilation area balance between indoor wind and outdoor wind in a heat exchange core.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A heat exchange unit comprises a frame, a heat exchange core, an outdoor fan module and an indoor fan module; the frame comprises a first layer space, a second layer space and a third layer space which are separated in sequence along a first direction; the heat exchange core is connected between the second layer space and the third layer space; in the third layer space, an indoor air inlet cavity and an outdoor air outlet cavity are separated along the second direction; in the second layer space, an outdoor air inlet cavity and an indoor air outlet cavity are separated along the second direction; the outdoor air inlet cavity is connected to the indoor air outlet cavity through an outdoor air heat exchange channel of the heat exchange core To the outdoor wind outlet cavity, and the outdoor fan module is arranged at the outdoor wind outlet cavity; the indoor wind inlet cavity is connected to the indoor wind outlet cavity through the indoor wind heat exchange channel of the heat exchange core, and the indoor fan module is arranged at the connection between the indoor wind outlet cavity and the first layer space to supply air to the first layer space; the indoor wind inlet cavity forms a return air outlet at one end in the third direction; the first direction span of the third layer space is greater than the first direction span of the second layer space; the first direction, the second direction and the third direction are arranged perpendicular to each other.

[0011] In the above-mentioned heat exchange unit, a return air port is formed at one end of the indoor air inlet cavity in the third direction (longitudinal direction) to facilitate the connection with the air duct. In the first direction, the first direction span of the third layer space is made larger than the first direction span of the second layer space. Therefore, when it is restricted in the first direction, the span of the outdoor air inlet cavity can be compressed in the first direction, and the span of the indoor air inlet cavity can be expanded, which can increase the flow area of ​​the return air port to increase the ventilation volume. As for the outdoor air inlet cavity, since there is no need to set a specific external interface to connect the air duct, air can be introduced from the end face in the second direction and / or the side in the second direction. Specifically, air can be introduced from both ends of the end face in the second direction. The optional air inlet area is large. Therefore, even if the cross-sectional size in the third direction is compressed, a larger ventilation area can still be obtained. At the same time, since the indoor fan module supplies air to the first-layer space, and the first-layer space does not need to be divided in the second direction, the external air outlet of the first-layer space, i.e., the air supply outlet, is less restricted in size in the second direction. However, due to the separation of the outdoor air outlet cavity, the return air outlet of the indoor air inlet cavity of the third-layer space will be restricted in size in the second direction.

[0012] By increasing the height of the third layer and reducing the height of the second layer, the ventilation area of ​​the external air outlets such as the indoor return air outlet and the air supply outlet can be better balanced, and the outdoor air inlet and outlet can be guaranteed. While facilitating the external air duct, the ventilation area of ​​the indoor air inlet cavity return air outlet is effectively expanded, thereby effectively solving the problem of poor balance of indoor and outdoor air ventilation areas of the heat exchange core.

[0013] In some technical solutions, the first-direction span of the first-layer space is greater than the first-direction span of the second-layer space and smaller than the first-direction span of the third-layer space.

[0014] In some technical solutions, the first direction is a vertical direction, and the first layer of space, the second layer of space and the third layer of space are arranged in sequence from bottom to top.

[0015] In some technical schemes, in the third direction, the cross-section of the heat exchange core is rectangular; a group of relative corners of the heat exchange core are the first corner and the second corner arranged in parallel along the second direction and are located at the transition position between the second layer space and the third layer space, so that the heat exchange core is a barrier between the second layer space and the third layer space; another group of relative corners of the heat exchange core are the third corner and the fourth corner arranged in parallel along the first direction, and the third corner extends into the third layer space and is connected to the top of the third layer space through the first partition, and the fourth corner extends into the second layer space and is connected to the bottom of the second layer space through the second partition.

[0016] In some technical solutions, the rack includes a first layer plate, a second layer plate, and a third layer plate arranged in sequence along a first direction. In the first direction: the first layer space is formed between the first layer plate and the second layer plate, the second layer space is formed between the second layer plate and the heat exchange core, and the third layer space is formed between the heat exchange core and the third layer plate; the indoor fan module has an air outlet direction facing downward, is installed on the second layer plate and extends toward the first layer space, and the outdoor fan module has an air outlet direction facing upward and is not lower than the third layer plate.

[0017] In some technical schemes, the rack forms side wall portions on both sides in the second direction; the indoor air inlet surface of the heat exchange core, the first partition plate, the corresponding part of the third layer plate and the corresponding part of the side wall portion on the corresponding side are connected in sequence to surround the indoor air inlet cavity; the outdoor air inlet surface of the heat exchange core, the second partition plate, the corresponding part of the second layer plate and the corresponding part of the side wall portion on the corresponding side are connected in sequence to surround the outdoor air inlet cavity; the rack forms an external end side wall on one side of the third direction, and the return air outlet of the indoor air inlet cavity and the supply air outlet of the first layer space are both arranged on the external end side wall.

[0018] In some technical schemes, the rack is provided with an equipment maintenance cavity on the other side of the third direction, and at least one of a compressor and an electronic control device is placed in the equipment maintenance cavity. A vent communicating with the outdoor environment is opened in the equipment maintenance cavity; and the end of the outdoor air inlet cavity corresponding to the equipment maintenance cavity is connected to the equipment maintenance cavity.

[0019] In some technical solutions, at the external end side wall, the end of the first layer plate, the end of the second layer plate and the corresponding parts of the ends of the side walls on both sides are together surrounded to form the air outlet;

[0020] At the external end side wall, the end of the indoor air inlet surface, the end of the first partition plate, the end of the corresponding part of the third layer plate and the end of the corresponding part of the side wall on the corresponding side are sequentially surrounded to form the return air outlet;

[0021] At least a portion of the vents of the outdoor air inlet cavity communicating with the outdoors are arranged on the side wall of the external connection end, and at least a portion of the vents communicating with the outdoors are arranged on the side wall portion on the corresponding side;

[0022] The span of the second partition in the first direction is not less than the blade diameter of the indoor fan module.

[0023] In some technical schemes, along the second direction, two rows of the heat exchange cores are arranged in parallel, so that: the third layer space is separated by the outdoor wind outlet cavity and the indoor wind inlet cavity located on both sides of the outdoor wind outlet cavity in the second direction; the second layer space is separated by the indoor wind outlet cavity and the outdoor wind inlet cavity located on both sides of the indoor wind outlet cavity in the second direction; the two outdoor wind inlet cavities are connected to the same outdoor wind outlet cavity through the two heat exchange cores respectively; the two indoor wind inlet cavities are connected to the same indoor wind outlet cavity through the two heat exchange cores respectively.

[0024] In some technical schemes, a condenser is provided in the outdoor wind outlet cavity, and an evaporator is provided in the indoor wind outlet cavity; a spray device for spraying the outdoor heat exchange channel of the heat exchange core is provided in the outdoor wind outlet cavity and / or the outdoor wind inlet cavity.

[0025] In some technical solutions, the sum of the flow areas of the return air outlets corresponding to the two indoor air inlet cavities is not less than the flow area of ​​the supply air outlet corresponding to the first layer space. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a cross-sectional structure in the third direction of a heat exchange unit provided by an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the upper span of the cross-sectional structure of the heat exchange unit in the third direction provided by an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of a three-dimensional structure of a heat exchanger unit in one direction provided by an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the three-dimensional structure of the heat exchanger unit provided in another direction of an embodiment of the present invention.

[0031] The following are marked in the accompanying drawings:

[0032] Frame 1, heat exchange core 2, outdoor fan module 3, indoor fan module 4, evaporator 5, condenser 6, enclosure 7, first partition 8, second partition 9;

[0033] A first layer space 11, a second layer space 12, a third layer space 13, an equipment maintenance cavity 14, a first layer plate 15, a second layer plate 16, a third layer plate 17, an external end side wall 18, and a side wall portion 19;

[0034] Indoor air inlet cavity 131, outdoor air outlet cavity 132, outdoor air inlet cavity 121, indoor air outlet cavity 122, return air port 1311, air supply port 111, vent 1211;

[0035] A first corner portion 21, a second corner portion 22, a third corner portion 23, a fourth corner portion 24, an outdoor air inlet surface 25, an outdoor air outlet surface 26, an indoor air inlet surface 27, and an indoor air outlet surface 28;

[0036] First direction Z, second direction X, third direction Y;

[0037] The first direction span of the first layer space is h1, the first direction span of the second layer space is h2, and the first direction span of the third layer space is h3. DETAILED DESCRIPTION

[0038] The embodiment of the present invention discloses a heat exchange unit, which effectively solves the problem of poor ventilation area balance between indoor wind and outdoor wind in a heat exchange core.

[0039] 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.

[0040] See also Figure 1-Figure 4 , Figure 1 A schematic diagram of a cross-sectional structure in the third direction of a heat exchange unit provided by an embodiment of the present invention; Figure 2 A schematic diagram of the upper span of the cross-sectional structure of the heat exchange unit in the third direction provided by an embodiment of the present invention; Figure 3 A schematic diagram of a three-dimensional structure of a heat exchanger unit in one direction provided by an embodiment of the present invention; Figure 4 A schematic diagram of the three-dimensional structure of the heat exchanger unit provided in another direction of an embodiment of the present invention.

[0041] In some embodiments, a heat exchange unit is provided, including a frame 1, a heat exchange core 2, an outdoor fan module 3 and an indoor fan module 4. At the same time, in order to facilitate the description of the structural relationship, a first direction Z, a second direction X and a third direction Y which are perpendicular to each other are introduced. The first direction Z corresponds to Figure 1 The up and down directions in the second direction X correspond to Figure 1The left and right directions in the text can also be called the horizontal direction. The third direction Y corresponds to Figure 1 The viewing direction in the image can also be called the paper orientation direction or the longitudinal direction.

[0042] In the frame 1, there are a first layer space 11, a second layer space 12 and a third layer space 13 which are separated in sequence along the first direction Z, as shown in the attached figure. Figure 1 In the figure, from bottom to top, there are first space 11, second space 12 and third space 13. The specific separation method can be separated by a layer plate or other structures, such as the second space 12 and the third space 13 can be separated by the heat exchange core 2.

[0043] The heat exchange core 2 is connected between the second space 12 and the third space 13 , that is, one side in the first direction Z extends to the second space 12 , and the other side extends to the third space 13 , so as to transfer indoor wind and outdoor wind between the second space 12 and the third space 13 .

[0044] In the third layer space 13, an indoor wind inlet cavity 131 and an outdoor wind outlet cavity 132 are formed along the second direction X, and in the second layer space 12, an outdoor wind inlet cavity 121 and an indoor wind outlet cavity 122 are formed along the second direction X. Figure 1 As shown, in the left-right direction, the indoor wind inlet chamber 131 and the outdoor wind outlet chamber 132 are separated by the first partition 8, and the outdoor wind inlet chamber 121 and the indoor wind outlet chamber 122 are separated by the second partition 9; since the second layer space 12 and the third layer space 13 are distributed up and down, the indoor wind inlet chamber 131 and the outdoor wind inlet chamber 121 are arranged up and down, and the outdoor wind outlet chamber 132 and the indoor wind outlet chamber 122 are separated up and down. The indoor wind inlet chamber 131 and the outdoor wind inlet chamber 121 are both connected to the side wall portion 19 of the side of the frame 1 in the second direction X.

[0045] The outdoor wind inlet chamber 121 is connected to the outdoor wind outlet chamber 132 through the outdoor wind heat exchange channel of the heat exchange core 2, and an outdoor fan module 3 is provided at the outdoor wind outlet chamber 132 to draw the outdoor wind outlet chamber 132 outward. Driven by the outdoor fan module 3, the outdoor wind enters the outdoor wind inlet chamber 121 through the vent 1211 connected to the outdoor environment, and then enters the outdoor wind heat exchange channel of the heat exchange core 2 for preliminary heat exchange, and then enters the outdoor wind outlet chamber 132 to be further drawn out by the fan. The condenser 6 is provided, and the outdoor wind coming out of the heat exchange core 2 is drawn away by the outdoor fan module 3 after passing through the condenser 6 in the outdoor wind outlet chamber 132.

[0046] The indoor air inlet cavity 131 is connected to the indoor air outlet cavity 122 through the indoor air heat exchange channel of the heat exchange core 2, and an indoor fan module 4 is provided at the connection between the indoor air outlet cavity 122 and the first layer space 11 to supply air to the first layer space 11, and the first layer space 11 is provided with an indoor air outlet (also called the air supply port 111) for supplying air to the outside. So that under the drive of the indoor fan module 4, the air body at the indoor air inlet (also called the return air port 1311) enters the indoor air inlet cavity 131, and then enters the indoor air outlet cavity 122 through the indoor air heat exchange channel of the heat exchange core 2, and then enters the first layer space 11 on the lower side through the drive of the indoor fan module 4 at the connection, and then the air supply port 111 provided in the first layer space 11 supplies air to the outside. In the case where the evaporator 5 is provided, the indoor air coming out of the heat exchange core 2 first passes through the evaporator 5 in the indoor air outlet cavity 122, and then flows to the indoor fan module 4. In the heat exchange core 2, the internal fluids of the outdoor air heat exchange channel and the indoor air heat exchange channel can exchange heat with each other.

[0047] Along the first direction Z, the first direction span h3 of the third space 13 is greater than the first direction span h2 of the second space 12, that is, the partition between the second space 12 and the third space 13 is offset toward the first space 11, that is, the heat exchange core 2 is offset toward the first space 11 as a whole, so that the first direction span of the indoor air inlet cavity 131 is greater than the first direction span of the outdoor air inlet cavity 121. Figure 2 As shown, the height of the indoor wind inlet cavity 131 is higher than the height of the outdoor wind inlet cavity 121. This makes the cross-sectional area of ​​the indoor wind inlet cavity 131 in the third direction Y larger than the cross-sectional area of ​​the outdoor wind inlet cavity 121 in the third direction Y.

[0048] The indoor air inlet cavity 131 forms an external air outlet, i.e., a return air outlet 1311, at one end in the third direction Y, so as to facilitate connection to the target indoor through the air duct. Generally speaking, the length of the heat exchange core 2 extending in the third direction Y is significantly greater than the dimensions of its cross section in all transverse directions (including the first direction Z and the second direction X). It is more convenient to connect to the air duct by setting the external air outlet at the end than setting the external air outlet at the side.

[0049] The span of the indoor wind inlet cavity 131 in the second direction X is approximately equal to the span of the outdoor wind inlet cavity 121 in the second direction X, but the span of the first layer space 11 in the second direction X is approximately equal to the span of the indoor wind inlet cavity 131 in the second direction X plus the span of the outdoor wind outlet cavity 132 in the second direction X, and the thickness of the first partition 8, etc. is ignored (the impact is too small).

[0050] In the above heat exchange unit, a return air port 1311 is formed at one end of the indoor air inlet cavity 131 in the third direction Y (longitudinal direction) to facilitate the connection with the ventilation duct. In the first direction Z, the first direction span h3 of the third layer space 13 is made larger than the first direction span h2 of the second layer space 12. Therefore, when it is restricted in the first direction Z, the span of the outdoor air inlet cavity 121 can be compressed in the first direction Z, and the span of the indoor air inlet cavity 131 can be expanded, and the flow area of ​​the return air port 1311 can be increased to increase the ventilation volume. As for the outdoor air inlet cavity 121, since it is not necessary to set a specific external interface to connect the ventilation duct, the air can be inlet from the end face in the second direction and / or the side face in the second direction. Specifically, the air can be inlet from both ends of the end face in the second direction, and the optional air inlet area is large. Therefore, even if the cross-sectional size in the third direction Y is compressed, a large ventilation area can still be obtained. At the same time, since the indoor fan module 4 supplies air to the first layer space 11, and the first layer space 11 does not need to be divided in the second direction X, the external air outlet of the first layer space 11, that is, the air supply outlet 111, is less restricted in size in the second direction X. However, the third layer space 13 will be separated by the outdoor air outlet cavity 132, so the return air outlet 1311 of the indoor air inlet cavity 131 will be restricted in size in the second direction X.

[0051] By increasing the vertical height of the third layer space 13 and reducing the vertical height of the second layer space 12, the ventilation area of ​​the external air outlets such as the indoor air return outlet 1311 and the air supply outlet 111 can be better balanced, and the outdoor air inlet and outlet effect can be guaranteed. While facilitating the external air duct, the ventilation area of ​​the indoor air inlet cavity 131 and the return air outlet 1311 is effectively expanded, thereby effectively solving the problem of poor ventilation area balance between indoor and outdoor air in the heat exchange core 2.

[0052] In addition, when a spray structure is provided, since the third layer space 13 is enlarged, the outdoor air outlet cavity 132 can be correspondingly enlarged, thus providing installation space for the upper spray structure, so the adaptability is better.

[0053] In addition, since the outdoor air outlet cavity 132 is enlarged, a retreat space is provided to increase the distance between the condenser 6 and the heat exchange core 2 in the first direction Z, so that for the cavity between the condenser 6 and the heat exchange core 2, more space is provided for setting an air inlet at one end in the third direction Y. The air entering from the air inlet can allow the outdoor wind to avoid the heat exchange core 2 and enter the condenser 6.

[0054] In some embodiments, compared with the equal height arrangement of the first layer space 11, the second layer space 12 and the third layer space 13, the partition between the second layer space 12 and the third layer space 13 is offset to the first layer space 11, so that the span of the second layer space 12 in the vertical direction is lower than the span of the third layer space 13 in the vertical direction, so that along the first direction Z, the first direction span h1 of the first layer space 11 is greater than the first direction span h2 of the second layer space 12 and smaller than the first direction span h3 of the third layer space 13. This allows the ventilation area of ​​the external air outlet (air supply outlet 111) at one end of the first layer space 11 in the third direction Y to remain unchanged, while the external air outlet (return air outlet 1311) at one end of the indoor air inlet cavity 131 in the third direction Y can be enlarged in size in the first direction Z (the span in the vertical direction becomes larger), so that the ventilation area can be increased. The span of the air supply outlet 111 in the second direction X may be no less than the span of the return air outlet 1311 in the second direction X plus the corresponding span of the outdoor air outlet cavity 132 , which is conducive to making the ventilation area of ​​the air supply outlet 111 and the ventilation area of ​​the return air outlet 1311 close to each other.

[0055] Of course, regarding the expansion degree of the third layer space 13, generally, expansion is conducive to achieving the above-mentioned effect. From a comprehensive consideration, it can be expanded to make the total flow area of ​​the return air outlet 1311 not less than the total flow area of ​​the supply air outlet 111. When there are multiple return air outlets 1311, the flow area of ​​all return air outlets 1311 should be counted. Correspondingly, when there are multiple supply air outlets 111, the flow area of ​​all supply air outlets 111 should be counted.

[0056] In some embodiments, generally in use, the first direction Z is a vertical direction, that is, the first layer of space 11, the second layer of space 12 and the third layer of space 13 are arranged in sequence from bottom to top. Compared with the second direction X or the third direction Y being an up-and-down direction, the size is easier to meet the requirements, and the size ratio is similar to that of a container, so as to facilitate transportation, as described below.

[0057] Generally speaking, the size of the heat exchange core 2 in the third direction Y is significantly larger than the size in the first direction Z and the size in the second direction X. For a heat exchange core 2 whose cross section in the third direction Y (the cross section perpendicular to the third direction Y) is square, the size in the third direction Y is generally between three and twelve times the length of the side length of the cross section. For example, when a cube-shaped core monomer is used, three to twelve core monomers are generally arranged in parallel in the third direction Y to form the above-mentioned heat exchange core 2; when two heat exchange cores 2 are arranged in parallel along the second direction X, the two heat exchange cores 2 can be provided with the same number of core monomers, such as three to twelve core monomers. The length of the second direction X and the length of the first direction Z are set in accordance with the cross-sectional size of the heat exchange core 2 in the third direction Y, generally not exceeding three times its size, and the larger the proportion of the heat exchange core 2, the better the effect. Therefore, the length of the whole machine in the second direction X and the length of the first direction Z will be close, and will be significantly smaller than the size in the third direction Y, so as to adapt to the proportional relationship of the container and facilitate transportation.

[0058] As mentioned above, the heat exchange core 2 is connected between the second layer space 12 and the third layer space 13. Specifically, a partition structure can be formed between the second layer space 12 and the third layer space 13 of the heat exchange core 2. For example, the indoor air inlet surface 27 of the heat exchange core 2 serves as the lower cavity wall of the indoor air inlet cavity 131; the outdoor air inlet surface 25 of the heat exchange core 2 serves as the upper cavity wall of the outdoor air inlet cavity 121; the indoor air outlet surface 28 of the heat exchange core 2 serves as the upper cavity wall of the indoor air outlet cavity 122; and the outdoor air outlet surface 26 of the heat exchange core 2 serves as the lower cavity wall of the outdoor air outlet cavity 132. This arrangement can effectively expand the inlet and outlet surface areas of the heat exchange core 2 to increase the ventilation volume.

[0059] In some embodiments, the cross section of the heat exchange core 2 in the third direction Y can be rectangular, and the rectangle can be a square or a rectangular. Compared with a hexagonal cross section, a rectangle, especially a square, may have some disadvantages, but a larger inlet and outlet surface of indoor wind and outdoor wind can be obtained.

[0060] The cross section of the heat exchange core 2 is rectangular, wherein the indoor air inlet surface 27 and the outdoor air outlet surface 26 are both inclined relative to the first direction Z and are both inclined relative to the second direction X.

[0061] A set of relative corners of the heat exchange core 2 is a first corner 21 and a second corner 22 arranged in parallel along the second direction X and located at a transition position between the second space 12 and the third space 13, so that the heat exchange core 2 is a partition between the second space 12 and the third space 13. For a single-row heat exchange core 2, the first corner 21 and the second corner 22 can extend to the outer side walls 19 of the rack 1 on both sides in the second direction X, respectively, and the heat exchange core 2 serves as a partition between the second space 12 and the third space 13; for a double-row heat exchange core 2, the first corners 21 of the two rows of heat exchange cores 2 are arranged opposite to each other, and the second corners 22 of the two rows of heat exchange cores 2 extend to the outer side walls 19 of the rack 1 on both sides in the second direction X, respectively, and the two rows of heat exchange cores 2 serve together as a partition between the second space 12 and the third space 13.

[0062] The other set of relative corners of the heat exchange core 2 is the third corner 23 and the fourth corner 24 arranged in parallel along the first direction Z. Specifically, the third corner 23 extends into the third space 13 and is connected to the top of the third space 13 through the first partition 8, that is, the lower part of the first partition 8 is connected to the third foot, and the upper part of the first partition 8 is connected to the top of the third space 13. At this time, the top of the third space 13 can provide tension to the third corner 23 through the first partition 8. On both sides of the first partition 8 are the indoor air inlet cavity 131 and the outdoor air outlet cavity 132. When two rows of heat exchange cores 2 are provided, two first partitions 8 are correspondingly provided, and the outdoor air outlet cavity 132 is formed between the two first partitions 8.

[0063] The fourth corner 24 extends into the second space 12 and is connected to the bottom of the second space 12 through the second partition 9. The upper part of the second partition 9 is connected to the fourth corner 24, and the lower part is connected to the bottom of the second space 12. At this time, the bottom of the second space 12 supports the fourth corner 24 through the second partition 9. The two sides of the second partition 9 are the outdoor air inlet cavity 121 and the indoor air outlet cavity 122. When two rows of heat exchange cores 2 are provided, two second partitions 9 are correspondingly provided, and the indoor air outlet cavity 122 is formed between the two second partitions 9. The first partition 8 and the second partition 9 are preferably arranged in alignment in the second direction X, that is, the projections in the first direction Z overlap.

[0064] Through the above arrangement, the inlet and outlet surfaces can be made larger, and the crossing effect of indoor wind and outdoor wind at the heat exchange core 2 is better.

[0065] In some embodiments, in order to better form the first layer space 11, the second layer space 12 and the third layer space 13, a layer plate is generally provided. The layer plate can be a flat plate structure with high strength, or a thin flat plate and a flat plate frame. Generally, necessary openings need to be provided on the layer plate.

[0066] Specifically, the rack 1 may include a first plate 15, a second plate 16, and a third plate 17 arranged in sequence along the first direction Z. As shown in the attached figure, the first plate 15 may also be called a bottom plate. In the first direction Z: the first layer of space 11 is formed between the first plate 15 and the second plate 16, the second layer of space 12 is formed between the second plate 16 and the heat exchange core 2, and the third layer of space 13 is formed between the heat exchange core 2 and the third plate 17. The first plate 15, the second plate 16, and the third plate 17 may be of the same size and aligned, that is, the projected areas in the third direction Y are equal and overlap, such as being rectangular.

[0067] As shown in the attached figure, for the heat exchange technology of two rows of heat exchange cores 2, the cross-section of the top of the second space 12 in the third direction Y is W-shaped, and the cross-section of the bottom of the third space 13 in the third direction Y is inverted W-shaped.

[0068] As shown in the attached figure, the first layer 15 constitutes the bottom plate, the second layer 16 constitutes the middle plate, and the third layer 17 constitutes the top plate; both sides of the first layer 15, the second layer 16 and the third layer 17 in the second direction X are connected to the side wall portion 19 on the corresponding side. One side of the first layer 15, the second layer 16 and the third layer 17 in the third direction Y is connected to the external end side wall 18 on one side, and the other side is connected to the equipment maintenance cavity 4. The side wall portion 19 is vertically arranged, that is, perpendicular to the second direction X, and the first layer 15, the second layer 16 and the third layer 17 are all perpendicular to the first direction Z; the external end side wall 18 is vertically arranged, that is, perpendicular to the third direction Y.

[0069] By setting, the structure can be made more compact, so that the heat exchange core 2 occupies a larger space, thereby better ensuring the heat exchange area.

[0070] At this time, for the indoor fan module 4 and the outdoor fan module 3: the indoor fan module 4 has an air outlet direction downward, and is installed on the second layer board 16 and extends to the first layer space 11. At this time, there is still a certain gap between the bottom of the indoor fan module 4 and the first layer board 15. Generally speaking, the distance between the first layer board 15 and the second layer board 16, that is, the height of the first layer space 11 is between 1.5 and 2.5 times the diameter of the impeller of the indoor fan module 4, and the height of the indoor fan module 4 is generally equal to or nearly equal to the diameter of the impeller of the indoor fan module 4; the outdoor fan module 3 has an air outlet direction upward and is not lower than the third layer board 17. Specifically, it can be installed on the third layer board 17 and extend upward from the third layer board 17, or it can be installed higher than the third layer board 17. Through the above arrangement, a pulling effect can be formed, and at the same time, more width can be provided for the air outlet 111 corresponding to the first layer space 11.

[0071] Specifically, the first direction span h3 of the third layer space 13 may be the distance between the first corner 21 and the third layer board 17 , and the first direction span h2 of the second layer space 12 may be the distance between the first corner 21 and the second layer board 16 .

[0072] Furthermore, in order to effectively expand the proportion of the heat exchange core 2 in the second direction X and facilitate air inlet and outlet, the indoor air inlet cavity 131 and the outdoor air inlet cavity 121 can be extended to form side wall portions 19 on both sides of the frame 1 in the second direction X. At this time: the indoor air inlet surface 27 of the heat exchange core 2, the first partition plate 8, the corresponding part of the third layer plate 17, and the corresponding part of the side wall portion 19 on the corresponding side are connected in sequence to surround the indoor air inlet cavity 131, and the above four parts constitute the upper, lower, left and right four sides of the indoor air inlet cavity 131; the outdoor air inlet surface 25 of the heat exchange core 2, the second partition plate 9, the corresponding part of the second layer plate 16, and the corresponding part of the side wall portion 19 on the corresponding side are connected in sequence to surround the outdoor air inlet cavity 121, and the above four parts constitute the upper, lower, left and right four sides of the outdoor air inlet cavity 121.

[0073] At this time, the rack 1 forms an external end side wall 18 on one side of the third direction Y, wherein the external air outlet of the indoor air inlet cavity 131 and the external air outlet of the first layer space 11 are both arranged on the external end side wall 18. That is, the air supply outlet 111 and the air return outlet 1311 are both arranged on the external end side wall 18. By integrating on the external end side wall 18, it is convenient to centrally arrange the air supply duct and the air return duct.

[0074] Specifically, at the external end side wall 18, the end of the first layer plate 15, the end of the second layer plate 16 and the corresponding parts of the ends of the side walls 19 on both sides together surround the air supply port 111 of the first layer space 11, and the corresponding parts of the ends of the side walls 19 on both sides refer to the parts on the ends of the side walls 19 on both sides that correspond to the first layer space 11.

[0075] At the external end side wall 18, the end of the indoor air inlet surface 27, the end of the first partition plate 8, the end of the corresponding part of the third layer plate 17 and the end of the corresponding part of the side wall portion 19 on the corresponding side are connected in sequence to surround the return air outlet 1311 of the indoor air inlet cavity 131.

[0076] Correspondingly, a vent 1211 that allows at least a portion of the outdoor wind inlet cavity 121 to communicate with the outdoors is arranged on the external end side wall 18, and at least a portion of the vent 1211 that communicates with the outdoors is arranged on the side wall portion 19 on the corresponding side.

[0077] Specifically, at the external end side wall 18, the end of the outdoor air inlet surface 25 of the heat exchange core 2, the end of the second partition plate 9, the end of the corresponding part of the second layer plate 16, and the end of the corresponding part of the side wall portion 19 on the corresponding side can be connected in sequence to surround an outdoor air inlet cavity 121. For the outdoor vent 1211 at the side wall portion 19, the upper edge can be located at the second corner 22, the lower edge can be located at the second layer plate 16, one end edge can be located at the external end side wall 18, and the other end edge can be located at the equipment maintenance cavity 14 or the end side wall.

[0078] Considering that the span of the second layer space 12 in the first direction Z cannot be too small, otherwise it will affect the fan exhaust effect of the indoor fan module 4, therefore, the span of the second partition plate 9 in the first direction Z can be made not less than the blade diameter of the indoor fan module 4 to ensure the span of the indoor air outlet cavity 122 in the first direction Z. The blade diameter of the indoor fan module 4 is generally set according to the ventilation volume of the whole machine.

[0079] The other side of the rack 1 on the other side of the third direction Y may form another side wall, or may be provided with an equipment maintenance chamber 14, which spans the first layer space 11, the second layer space 12 and the third layer space 13 in the third direction Y. The equipment maintenance chamber 14 may also correspond to a three-layer structure, in which the middle layer may be used to place equipment such as compressors, and the bottom layer may be used to place structures such as electronic control equipment. Preferably, the end of the outdoor wind inlet chamber 121 corresponding to the equipment maintenance chamber 14 is connected to the equipment maintenance chamber 14, and a vent 1211 communicating with the outdoor environment is provided at the equipment maintenance chamber 14, so that the negative pressure formed by the outdoor fan module 3 generates suction to the equipment maintenance chamber 14, so that the outdoor wind can pass through some equipment such as compressors and electronic control equipment to dissipate heat for the above-mentioned equipment. Of course, a portion of the side wall portion 19 corresponding to the outdoor wind inlet cavity 121 may be provided with a vent 1211 , and a portion of the external end side wall 18 corresponding to the outdoor wind inlet cavity 121 may also be provided with a vent 1211 .

[0080] In some embodiments, for example, along the second direction X, two rows of heat exchange cores 2 are arranged in parallel, so that: in the third layer space 13, there is an outdoor air outlet cavity 132 and an indoor air inlet cavity 131 located on both sides of the outdoor air outlet cavity 132 in the second direction X; in the second layer space 12, there is an indoor air outlet cavity 122 and an outdoor air inlet cavity 121 located on both sides of the indoor air outlet cavity 122 in the second direction X; the two outdoor air inlet cavities 121 are connected to the same outdoor air outlet cavity 132 through two heat exchange cores 2; the two indoor air inlet cavities 131 are connected to the same indoor air outlet cavity 122 through two heat exchange cores 2. As described above, an outdoor air outlet cavity 132 is formed between the two first partitions 8, that is, the outdoor fan module 3 arranged at the outdoor air outlet cavity 132 simultaneously exhausts air from the two rows of heat exchange cores 2. In order to better correspond to the arrangement, the outdoor fan module 3 can have two rows of outdoor fans, which are embedded and installed on the third layer plate 17. As mentioned above, an indoor air outlet cavity 122 is formed between the two second partitions 9, that is, the indoor fan module 4 arranged at the indoor air outlet cavity 122 simultaneously exhausts air from the two heat exchange cores 2. In order to better correspond to the setting, the indoor fan module 4 can have two rows of indoor fans, which are embedded and installed on the second layer plate 16.

[0081] Correspondingly, the sum of the flow areas of the return air outlets corresponding to the two indoor air inlet cavities can be no less than the flow area of ​​the supply air outlet corresponding to the first layer space, such as the former is 100% to 120% of the latter; generally, the excess part is taken into account the wind resistance of the heat exchange core.

[0082] In some embodiments, the heat exchange unit is generally also provided with a mechanical refrigeration system. The specific mechanical refrigeration system includes a condenser 6, an evaporator 5, a compressor and a throttling device connected in sequence. The condenser 6 may be provided in the outdoor air outlet chamber 132, and the evaporator 5 may be provided in the indoor air outlet chamber 122.

[0083] In some embodiments, the heat exchange unit can be a dry cooling unit or a wet cooling unit. Specifically, the heat exchange unit can be an evaporative cooling unit, and a spray device for spraying the outdoor heat exchange channel of the heat exchange core 2 is provided in the outdoor air outlet cavity 132 and / or the outdoor air inlet cavity 121. Considering that the third layer space 13 is larger than the second layer space 12, installation space is provided for the spray device in the outdoor air outlet cavity 132 to make it more adaptable.

[0084] In some embodiments, a baffle 7 may be provided on the upper side of the third panel 17 , and the baffle 7 may extend along the edge of the third panel 17 to form a square tube, wherein the outdoor fan module 3 is provided higher than the third panel 17 to be located within the baffle 7 .

[0085] 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.

[0086] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat exchange unit, comprising a frame (1), a heat exchange core (2), an outdoor fan module (3) and an indoor fan module (4); the frame (1) comprises a first layer space (11), a second layer space (12) and a third layer space (13) which are separated in sequence along a first direction (Z); the heat exchange core (2) is connected between the second layer space (12) and the third layer space (13); in the third layer space (13), an indoor air inlet cavity (131) and an outdoor air outlet cavity (132) are separated along a second direction (X); in the second layer space (12), an indoor air outlet cavity (132) and an indoor air inlet cavity (131) are separated along the second direction (X); An outdoor air inlet chamber (121) and an indoor air outlet chamber (122); the outdoor air inlet chamber (121) is connected to the outdoor air outlet chamber (132) through the outdoor air heat exchange channel of the heat exchange core (2), and the outdoor fan module (3) is arranged at the outdoor air outlet chamber (132); the indoor air inlet chamber (131) is connected to the indoor air outlet chamber (122) through the indoor air heat exchange channel of the heat exchange core (2), and the indoor fan module (4) is arranged at the connection between the indoor air outlet chamber (122) and the first layer space (11) to supply air to the first layer space (11); characterized in that: The indoor air inlet cavity (131) forms an air return port (1311) at one end in the third direction (Y); the first direction span (h3) of the third layer space (13) is greater than the first direction span (h2) of the second layer space (12); and the first direction (Z), the second direction (X), and the third direction (Y) are arranged perpendicular to each other.

2. The heat exchange unit according to claim 1, characterized in that: The first direction span (h1) of the first layer space (11) is greater than the first direction span (h2) of the second layer space (12) and smaller than the first direction span (h3) of the third layer space (13).

3. The heat exchange unit according to claim 1, characterized in that: The first direction (Z) is a vertical direction, and the first layer of space (11), the second layer of space (12) and the third layer of space (13) are arranged in sequence from bottom to top.

4. The heat exchange unit according to claim 3, characterized in that: In the third direction (Y), the cross section of the heat exchange core (2) is rectangular; a group of relative corners of the heat exchange core (2) are a first corner (21) and a second corner (22) arranged in parallel along the second direction (X) and located at a transition position between the second layer space (12) and the third layer space (13), so that the heat exchange core (2) is a barrier between the second layer space (12) and the third layer space (13); another group of relative corners of the heat exchange core (2) are a third corner (23) and a fourth corner (24) arranged in parallel along the first direction (Z), and the third corner (23) extends into the third layer space (13) and is connected to the top of the third layer space (13) through a first partition plate (8), and the fourth corner (24) extends into the second layer space (12) and is connected to the bottom of the second layer space (12) through a second partition plate (9).

5. The heat exchange unit according to claim 4, characterized in that: The rack comprises a first layer plate (15), a second layer plate (16) and a third layer plate (17) which are arranged in sequence along a first direction (Z); in the first direction (Z): the first layer space (11) is formed between the first layer plate (15) and the second layer plate (16), the second layer space (12) is formed between the second layer plate (16) and the heat exchange core (2), and the third layer space (13) is formed between the heat exchange core (2) and the third layer plate (17); the indoor fan module (4) has an air outlet direction facing downward, is installed on the second layer plate (16) and extends toward the first layer space (11), and the outdoor fan module (3) has an air outlet direction facing upward and is not lower than the third layer plate (17).

6. The heat exchange unit according to claim 5, characterized in that: The frame (1) forms side wall portions (19) on both sides in the second direction (X); the indoor air inlet surface (27) of the heat exchange core (2), the first partition plate (8), the corresponding part of the third layer plate (17) and the corresponding part of the side wall portion (19) on the corresponding side are connected in sequence to surround the indoor air inlet cavity (131); the outdoor air inlet surface (25) of the heat exchange core (2), the second partition plate (9), the corresponding part of the second layer plate (16) and the corresponding part of the side wall portion (19) on the corresponding side are connected in sequence to surround the outdoor air inlet cavity (121); the frame (1) forms an external end side wall (18) on one side in the third direction (Y), and the return air outlet (1311) of the indoor air inlet cavity (131) and the air supply outlet (111) of the first layer space (11) are both arranged on the external end side wall (18).

7. The heat exchange unit according to claim 6, characterized in that: The rack (1) is provided with an equipment maintenance chamber (14) on the other side of the third direction (Y); at least one of a compressor and an electric control device is placed in the equipment maintenance chamber (14); a vent (1211) communicating with an outdoor environment is provided in the equipment maintenance chamber (14); and an end portion of the outdoor air inlet chamber (121) corresponding to the equipment maintenance chamber (14) is connected to the equipment maintenance chamber (14).

8. The heat exchange unit according to claim 7, characterized in that: At the external end side wall (18), the end of the first layer plate (15), the end of the second layer plate (16) and the corresponding parts of the ends of the side wall portions (19) on both sides together surround the air supply port (111); At the external end side wall (18), the end of the indoor air inlet surface (27), the end of the first partition plate (8), the end of the corresponding part of the third layer plate (17), and the end of the corresponding part of the side wall portion (19) on the corresponding side are sequentially surrounded to form the return air outlet (1311); At least a portion of the ventilation openings (1211) of the outdoor air inlet cavity (121) communicating with the outdoors is arranged on the external end side wall (18), and at least a portion of the ventilation openings (1211) communicating with the outdoors is arranged on the side wall portion (19) on the corresponding side; The span of the second partition plate (9) in the first direction (Z) is not less than the blade diameter of the indoor fan module (4).

9. The heat exchange unit according to any one of claims 1 to 7, characterized in that: Along the second direction (X), two rows of the heat exchange cores (2) are arranged in parallel, so that: the outdoor air outlet cavity (132) and the indoor air inlet cavity (131) located on both sides of the outdoor air outlet cavity (132) in the second direction (X) are separated in the third layer space (13); the indoor air outlet cavity (122) and the outdoor air inlet cavity (121) located on both sides of the indoor air outlet cavity (122) in the second direction (X) are separated in the second layer space (12); the two outdoor air inlet cavities (121) are connected to the same outdoor air outlet cavity (132) through the two heat exchange cores (2); and the two indoor air inlet cavities (131) are connected to the same indoor air outlet cavity (122) through the two heat exchange cores (2).

10. The heat exchange unit according to claim 9, characterized in that: A condenser (6) is provided in the outdoor air outlet chamber (132), and an evaporator (5) is provided in the indoor air outlet chamber (122); a spray device for spraying the outdoor heat exchange channel of the heat exchange core (2) is provided in the outdoor air outlet chamber (132) and / or the outdoor air inlet chamber (121).

11. The heat exchange unit according to claim 9, characterized in that: The total flow area of ​​the return air outlets (1311) corresponding to the two indoor air inlet cavities (131) is not less than the flow area of ​​the air supply outlets (111) corresponding to the first layer space (11).

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