Heat exchange unit

Abstract

The utility model discloses a heat exchange unit. The heat exchange unit 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 utility model 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 requirements such as air volume, an integrated heat exchange 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 switchgear mainly including 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 and third spaces, with half located in the second space and the other half in the third space. In the heat exchange core, outdoor air channels and indoor air channels are formed. The indoor air channel flows from top to bottom, and the outdoor air 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 dimension is generally significantly larger than the dimension of the heat exchange core in the outdoor air inlet direction, and also significantly larger than the dimension of the heat exchange core in the indoor air inlet direction, that is, it is set perpendicular to the direction of the indoor air inlet and the direction of the outdoor air inlet.

[0005] The two heat exchange cores are arranged horizontally side by side so that the indoor air inlets and outdoor air outlets converge relative to each other. This results in the third-layer space forming an outdoor air outlet cavity in the middle to collect the outdoor air outlet of the two heat exchange cores; and indoor air inlet cavities 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 also installed at the top of the third-layer space to supply air upward.

[0006] Similarly, in the second-layer space, an indoor air outlet cavity is formed in the middle to collect the indoor air outlet from the two heat exchange cores; and outdoor air inlet cavities are formed on both sides 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, further cooling the indoor air. An indoor air fan module is installed at the top of the first-layer space to transport the air from the indoor air outlet cavity into the first-layer space, and then the air is transferred from the first-layer space to the outdoor air outlet.

[0007] In the process of realizing the invention of this utility model, the inventor discovered that there are at least the following problems in the existing technology: 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 can easily lead 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. Utility Model Content

[0008] In view of this, the purpose 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 the heat exchange core.

[0009] In order to achieve the above-mentioned purpose, 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 sequentially separated 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 a 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 outdoor air heat exchange channel of the heat exchange core to the outdoor air outlet cavity, and the outdoor fan module is arranged at the outdoor air outlet cavity; the indoor air inlet cavity is connected to the indoor air outlet cavity through the indoor air heat exchange channel of the heat exchange core, and the indoor fan module is arranged at the connection between the indoor air outlet cavity and the first layer space to supply air to the first layer space; the indoor air 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 outlet is formed at one end of the indoor air inlet cavity in the third direction (longitudinal direction) to facilitate connection to 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 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 outlet and the ventilation volume. As for the outdoor air inlet cavity, since there is no need to set up a specific external interface to connect to the air duct, air can be introduced from the end face in the second direction and / or the side face 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, so even if the cross-sectional dimension in the third direction is compressed, a large 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, that is, the air supply outlet, is less restricted in size in the second direction. However, due to the separation of the outdoor air outlet cavity in the third layer space, the return air outlet of the indoor air inlet cavity will be restricted in size in the second direction.

[0012] By increasing the height of the third layer and decreasing the height of the second layer, the ventilation area of ​​external air outlets such as the indoor return air outlet and the air supply outlet can be better balanced, while ensuring the effective inflow and outflow of outdoor air. While facilitating external air ducting, it effectively expands the ventilation area of ​​the indoor air inlet and return air outlet, thereby effectively solving the problem of poorly balanced ventilation area between indoor and outdoor air in 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 solutions, 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 a first partition, and the fourth corner extends into the second layer space and is connected to the bottom of the second layer space through a second partition.

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

[0017] In some technical solutions, 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 solutions, 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 provided in the equipment maintenance cavity; 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 end of the side wall 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 outside is arranged on the side wall of the external end, and at least a portion of the vents communicating with the outside is 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 solutions, along the second direction, two rows of the heat exchange cores are arranged in parallel, so that: 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 are separated in the third layer space; 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 are separated in the second layer space; the two outdoor wind inlet cavities are connected to the same outdoor wind outlet cavity through two heat exchange cores respectively; the two indoor wind inlet cavities are connected to the same indoor wind outlet cavity through two heat exchange cores respectively.

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

[0025] In some technical solutions, the total flow area 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

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

[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 utility model;

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

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of the heat exchanger provided in another direction of an embodiment of the utility model.

[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] First layer space 11, second layer space 12, third layer space 13, equipment maintenance cavity 14, first layer board 15, second layer board 16, third layer board 17, external end side wall 18, 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] First corner 21, second corner 22, third corner 23, fourth corner 24, outdoor air inlet surface 25, outdoor air outlet surface 26, indoor air inlet surface 27, 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 utility model discloses a heat exchange unit, which effectively solves the problem of poor ventilation area balance between indoor air and outdoor air 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

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

[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 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, and the third direction Y corresponds to Figure 1 The viewing direction in 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. 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 layer plates 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 air and outdoor air between the second space 12 and the third space 13.

[0044] In the third layer space 13, an indoor air inlet cavity 131 and an outdoor air outlet cavity 132 are formed along the second direction X, and in the second layer space 12, an outdoor air inlet cavity 121 and an indoor air outlet cavity 122 are formed along the second direction X. Figure 1 As shown, in the left-right direction, the indoor air inlet chamber 131 and the outdoor air outlet chamber 132 are separated by a first partition 8, and the outdoor air inlet chamber 121 and the indoor air outlet chamber 122 are separated by a second partition 9. Because the second-layer space 12 and the third-layer space 13 are distributed vertically, the indoor air inlet chamber 131 and the outdoor air inlet chamber 121 are arranged vertically, and the outdoor air outlet chamber 132 and the indoor air outlet chamber 122 are separated vertically. The indoor air inlet chamber 131 and the outdoor air 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 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. An outdoor fan module 3 is provided at the outdoor air outlet chamber 132 to draw the outdoor air outward from the outdoor air outlet chamber 132. Driven by the outdoor fan module 3, the outdoor air enters the outdoor air inlet chamber 121 through the vent 1211 connected to the outdoor environment, then enters the outdoor air heat exchange channel of the heat exchange core 2 for preliminary heat exchange, and then enters the outdoor air outlet chamber 132 to be further drawn out by the fan. The outdoor air from the heat exchange core 2 is provided with a condenser 6. After passing through the condenser 6 in the outdoor air outlet chamber 132, it is drawn out by the outdoor fan module 3.

[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. An indoor fan module 4 is provided at the junction of the indoor air outlet cavity 122 and the first layer space 11 to supply air to the first layer space 11. The first layer space 11 is provided with an indoor air outlet (also known as the air supply port 111) for supplying air to the outside. Driven by the indoor fan module 4, air from the indoor air inlet (also known as the return air port 1311) enters the indoor air inlet cavity 131, then passes through the indoor air heat exchange channel of the heat exchange core 2, enters the indoor air outlet cavity 122, and then, driven by the indoor fan module 4 at the junction, enters the first layer space 11 below, and then is supplied outward through the air supply port 111 provided in the first layer space 11. In the heat exchange core 2, where the evaporator 5 is installed, the indoor air flows through the evaporator 5 in the indoor air outlet cavity 122 before flowing to the indoor fan module 4. In the heat exchange core 2, 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 layer space 13 is greater than the first direction span h2 of the second layer space 12, that is, the partition between the second layer space 12 and the third layer space 13 is offset toward the first layer space 11, that is, the heat exchange core 2 is offset toward the first layer 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, or return air outlet 1311, at one end in the third direction Y, facilitating connection to the target indoor space 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). Providing an external air outlet at the end facilitates connection to the air duct compared to providing an external air outlet on the side.

[0049] The span of the indoor air inlet cavity 131 in the second direction X is approximately equal to the span of the outdoor air 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 air inlet cavity 131 in the second direction X plus the span of the outdoor air outlet cavity 132 in the second direction X, ignoring the thickness of the first partition 8 and the like (the impact is too small).

[0050] In the aforementioned heat exchanger 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 connection to the ventilation duct. In the first direction Z, 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. Therefore, when restricted in the first direction Z, the span of the outdoor air inlet cavity 121 can be compressed in the first direction Z, while the span of the indoor air inlet cavity 131 is expanded. This increases the flow area of ​​the return air port 1311 and improves ventilation. Since the outdoor air inlet cavity 121 does not require a specific external interface for connection to the ventilation duct, air can be introduced from the end face in the second direction and / or the side face in the second direction. Specifically, air can be introduced from both ends of the end face in the second direction, resulting in a large optional air inlet area. Therefore, even if the cross-sectional dimensions in the third direction Y are compressed, a large ventilation area can still be achieved. 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, due to the separation of the outdoor air outlet cavity 132, the return air outlet 1311 of the indoor air inlet cavity 131 in the third layer space 13 will be restricted in size in the second direction X.

[0051] By increasing the vertical height of the third-layer space 13 and decreasing the vertical height of the second-layer space 12, the ventilation areas of the indoor return air vent 1311 and the external air vents such as the air supply vent 111 can be better balanced, while ensuring the effective inflow and outflow of outdoor air. While facilitating external air ducting, the ventilation area of ​​the indoor air inlet cavity 131 and the return air vent 1311 is effectively expanded, thereby effectively solving the problem of poorly balanced ventilation areas between indoor and outdoor air in the heat exchange core 2.

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

[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 intake of 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 to the equal height arrangement of the first, second, and third spaces 11, the second and third spaces 12, 13 are offset toward the first space 11 by a barrier between the second and third spaces 12, 13, so that the vertical span of the second space 12 is smaller than the vertical span of the third space 13. This results in the first direction Z having a first-direction span h1 of the first space 11 that is greater than the first-direction span h2 of the second space 12 and smaller than the first-direction span h3 of the third space 13. This allows the ventilation area of ​​the external air outlet (air supply outlet 111) at one end of the first 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 larger in the first direction Z (with a larger vertical span), thereby increasing the ventilation area. 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 span corresponding to the outdoor air outlet cavity 132, which is conducive to the ventilation area of ​​the air supply outlet 111 and the ventilation area of ​​the return air outlet 1311 being close.

[0055] Of course, regarding the extent of expansion of the third layer space 13, generally, expansion is beneficial to achieving the above-mentioned effects. From a comprehensive perspective, the space can be expanded to ensure that the total flow area of ​​the return air vents 1311 is no less than the total flow area of ​​the supply air vents 111. When there are multiple return air vents 1311, the flow area of ​​all return air vents 1311 should be taken into account. Similarly, when there are multiple supply air vents 111, the flow area of ​​all supply air vents 111 should be taken into account.

[0056] In some embodiments, when in use, the first direction Z is generally vertical, that is, the first layer of space 11, the second layer of space 12, and the third layer of space 13 are arranged in order from bottom to top. Compared with the second direction X or the third direction Y being vertical, the dimensions are easier to meet the requirements and are approximately the size of a container for convenient transportation, as described below.

[0057] Generally speaking, the dimensions of the heat exchange core 2 in the third direction Y are significantly larger than those in the first direction Z and the second direction X. For a heat exchange core 2 with a square cross-section in the third direction Y (a section perpendicular to the third direction Y), the dimension in the third direction Y is generally between three and twelve times the side length of the cross-section. For example, when using cubic core units, three to twelve core units are generally arranged side by side in the third direction Y to form the heat exchange core 2. When two heat exchange cores 2 are arranged side by side along the second direction X, both heat exchange cores 2 can have the same number of core units, for example, three to twelve core units each. The lengths in the second direction X and the first direction Z are set accordingly based on the cross-sectional dimensions of the heat exchange core 2 in the third direction Y, generally not exceeding three times their respective dimensions. The greater the proportion of the heat exchange core 2, the better the performance. Therefore, the length of the entire device in the second direction X is similar to the length in the first direction Z, and significantly smaller than the dimension in the third direction Y, to accommodate the container's proportions and facilitate transportation.

[0058] As described above, the heat exchange core 2 connects between the second space 12 and the third space 13. Specifically, a partition structure can be provided between the second space 12 and the third 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 wall of the indoor air inlet cavity 131; the outdoor air inlet surface 25 of the heat exchange core 2 serves as the upper wall of the outdoor air inlet cavity 121; the indoor air outlet surface 28 of the heat exchange core 2 serves as the upper 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 wall of the outdoor air outlet cavity 132. This arrangement effectively expands the inlet and outlet areas of the heat exchange core 2, thereby increasing ventilation.

[0059] In some embodiments, the cross section of the heat exchange core 2 in the third direction Y can be rectangular. Specifically, the rectangular shape can be a square or a rectangular. Compared with a hexagonal cross section, a rectangular shape, especially a square shape, may have some disadvantages, but it can obtain a larger inlet and outlet area for indoor and outdoor air.

[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 the second direction X.

[0061] The heat exchange core 2 has a set of opposing corners, namely, a first corner 21 and a second corner 22, arranged side by side along the second direction X and located at the transition position between the second space 12 and the third space 13, so that the heat exchange core 2 serves as a barrier 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 in the second direction X, respectively. In this case, the heat exchange core 2 serves as a barrier 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 each other, while the second corners 22 of the two rows of heat exchange cores 2 extend to the outer side walls 19 of the rack 1 in the second direction X, respectively. In this case, the two rows of heat exchange cores 2 jointly serve as a barrier between the second space 12 and the third space 13.

[0062] The other set of opposing corners of the heat exchange core 2 is a third corner 23 and a 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 via the first partition 8. That is, the lower portion of the first partition 8 is connected to the third foot, while the upper portion 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 either side 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 corresponding first partitions 8 are provided, and the outdoor air outlet cavity 132 is formed between the two first partitions 8.

[0063] The fourth corner portion 24 extends into the second space 12 and connects to the bottom of the second space 12 via the second partition 9. The upper portion of the second partition 9 is connected to the fourth corner portion 24, while the lower portion is connected to the bottom of the second space 12. In this case, the bottom of the second space 12 supports the fourth corner portion 24 via the second partition 9. The second partition 9 defines an outdoor air inlet cavity 121 and an indoor air outlet cavity 122 on either side. When two rows of heat exchange cores 2 are provided, two corresponding second partitions 9 are provided, with the indoor air outlet cavity 122 formed between the two second partitions 9. The first partition 8 and the second partition 9 are preferably aligned in the second direction X, i.e., their 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 air and outdoor air at the heat exchange core 2 is better.

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

[0066] Specifically, the rack 1 can include a first plate 15, a second plate 16, and a third plate 17, arranged sequentially along a first direction Z. As shown in the accompanying drawings, the first plate 15 can also be referred to as a bottom plate. In the first direction Z, the first space 11 is formed between the first plate 15 and the second plate 16, the second space 12 is formed between the second plate 16 and the heat exchange core 2, and the third space 13 is formed between the heat exchange core 2 and the third plate 17. The first, second, and third plates 15, 16, 17 can be of the same size and aligned, meaning their projected areas in the third direction Y are equal and overlap, and can, for example, all be 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 accompanying drawings, the first layer 15 forms the bottom plate, the second layer 16 forms the middle plate, and the third layer 17 forms the top plate. Both sides of the first, second, and third layers 15, 16, and 17 in the second direction X are connected to the corresponding sidewall portion 19. On both sides of the first, second, and third layers 15, 16, and 17 in the third direction Y, one side is connected to the external end sidewall 18, and the other side is connected to the equipment maintenance cavity 4. The sidewall portion 19 is vertically arranged, that is, perpendicular to the second direction X, while the first, second, and third layers 15, 16, and 17 are all perpendicular to the first direction Z; the external end sidewall 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 facing downward, and is installed on the second layer board 16 and extends toward 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 times 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 facing 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 parts of the third layer plate 17, and the corresponding parts on 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 parts of the second layer plate 16, and the corresponding parts on 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 sidewall 18 on one side in the third direction Y. The external air outlets of the indoor air inlet chamber 131 and the first layer space 11 are both located on this external end sidewall 18. That is, the air supply outlet 111 and the air return outlet 1311 are both located on this external end sidewall 18. By integrating them on the external end sidewall 18, the supply and return air ducts can be centrally arranged.

[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 outlet 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 corresponding 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 air inlet cavity 121 to communicate with the outdoors is provided on the external end side wall 18, and at least a portion of the vent 1211 that communicates with the outdoors is provided on the side wall portion 19 on the corresponding side.

[0077] Specifically, at the external end sidewall 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 portion of the second layer plate 16, and the end of the corresponding portion of the sidewall portion 19 on the corresponding side can be sequentially connected to surround an outdoor air inlet cavity 121 to form an outdoor vent 1211. The outdoor vent 1211 at the sidewall portion 19 can have its upper edge located at the second corner 22, its lower edge located at the second layer plate 16, one end edge located at the external end sidewall 18, and the other end edge located at the equipment maintenance cavity 14 or the end sidewall.

[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 ventilation effect of the indoor fan module 4, the span of the second partition 9 in the first direction Z can be made no 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 entire machine.

[0079] The side edge 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, 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 outdoor air inlet chamber 121 and the end corresponding to the equipment maintenance chamber 14 are 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 vent 1211 may be provided on the portion of the side wall 19 corresponding to the outdoor wind inlet cavity 121 , and a vent 1211 may also be provided on the portion of the external end side wall 18 corresponding to the outdoor wind inlet cavity 121 .

[0080] In some embodiments, two rows of heat exchange cores 2 are arranged side by side along the second direction X, such that: in the third layer space 13, there is an outdoor air outlet cavity 132 and indoor air inlet cavities 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 outdoor air inlet cavities 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; and 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, the 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. For a better corresponding arrangement, the outdoor fan module 3 can have two rows of outdoor fans 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 equipped 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 can be provided in the outdoor air outlet cavity 132, and the evaporator 5 can be provided in the indoor air outlet cavity 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 corresponding spray device can be installed in the outdoor air outlet cavity 132 and / or the outdoor air inlet cavity 121 to spray the outdoor heat exchange channel of the heat exchange core 2. Considering that the third layer space 13 is larger than the second layer space 12, space is provided for installing the spray device in the outdoor air outlet cavity 132 to improve adaptability.

[0084] In some embodiments, a fence 7 may be provided on the upper side of the third layer plate 17 , and the fence 7 may extend along the edge of the third layer plate 17 to form a square tube, wherein the outdoor fan module 3 is provided higher than the third layer plate 17 to be located within the fence 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 will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily 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 is not limited to the embodiments shown herein but is intended to conform 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 sequentially separated 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 (131) and an outdoor air outlet cavity (132) 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 provided 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 provided 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 sequentially arranged 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) 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 layer space (12) and the third layer space (13), so that the heat exchange core (2) is a partition between the second layer space (12) and the third layer space (13); another group of relative corners of the heat exchange core (2) is 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 (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 (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) arranged in sequence along a first direction (Z); in the first direction (Z): the first layer plate (15) and the second layer plate (16) form the first layer space (11), the second layer plate (16) and the heat exchange core (2) form the second layer space (12), and the heat exchange core (2) and the third layer plate (17) form the third layer space (13); 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 walls (19) on both sides in the second direction (X); the indoor air inlet surface (27) of the heat exchange core (2), the first partition (8), the corresponding parts of the third layer (17), and the corresponding parts on the side wall (19) on the corresponding side are sequentially connected to surround the indoor air inlet cavity (131); the outdoor air inlet surface (25) of the heat exchange core (2), the second partition (9), the corresponding parts of the second layer (16), and the corresponding parts on the side wall (19) on the corresponding side are sequentially connected 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), wherein at least one of a compressor and an electric control device is placed in the equipment maintenance chamber (14), and a vent (1211) communicating with the 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 are together surrounded to form 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 (8), the end of the corresponding portion of the third layer (17), and the end of the corresponding portion of the side wall (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 outside is provided on the external end side wall (18), and at least a portion of the ventilation openings (1211) communicating with the outside is provided 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 cavity (132), and an evaporator (5) is provided in the indoor air outlet cavity (122); a spraying 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).

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 outlet (111) corresponding to the first layer space (11).

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