Total heat exchanger

Abstract

The application discloses a total heat exchanger, and belongs to the technical field of air treatment. The total heat exchanger comprises a casing, a heat exchange core body arranged in the casing, a plurality of partitions, a fresh air inlet cavity, a fresh air outlet cavity, an exhaust air inlet cavity and an exhaust air outlet cavity, wherein the heat exchange core body has a first corner and a third corner, a partition connected with the third corner is a third partition, and the two sides of the third partition are the exhaust air outlet cavity and the fresh air outlet cavity; a fresh air fan is arranged in the fresh air outlet cavity; an exhaust air fan is arranged in the exhaust air outlet cavity; the first corner is connected with a first side wall of the casing; the included angle between the side of the heat exchange core body facing the fresh air inlet cavity and the first side wall is alpha, the included angle between the side of the heat exchange core body facing the exhaust air inlet cavity and the first side wall is beta, and alpha is greater than beta; and an electric appliance box is arranged between the exhaust air fan and the third partition. The total heat exchanger adopts an electric appliance box built-in form and can reduce the influence of the electric appliance box on airflow.

Description

Technical Field

[0001] This application relates to the field of air treatment technology, and more particularly to a total heat exchanger. Background Technology

[0002] A total heat exchanger is a device with a heat exchange core, which includes a fresh air duct for circulating fresh outdoor air and an exhaust duct for discharging indoor stale air to the outside. The fresh outdoor air and the stale indoor air exchange heat at the heat exchange core to preheat or precool the introduced fresh air by recovering the waste heat in the exhaust.

[0003] The electrical box of a total heat exchanger is usually located on the outside of the casing to facilitate maintenance.

[0004] However, the electrical box occupies a large volume and is rather obtrusive when placed externally, affecting the overall appearance of the total heat exchanger. If the electrical box is placed internally, it will obstruct airflow. Summary of the Invention

[0005] This application aims to at least partially address one of the technical problems in the related art. To this end, this application provides a total heat exchanger that employs a built-in electrical box, thereby reducing the impact of the electrical box on airflow.

[0006] A total heat exchanger includes: a housing having a first sidewall; a heat exchange core disposed within the housing; multiple partitions dividing the space between the housing and the heat exchange core into a fresh air inlet chamber, a fresh air outlet chamber, an exhaust air inlet chamber, and an exhaust air outlet chamber; the heat exchange core having a first angle and a third angle diagonally distributed; the partition connected to the third angle is a third partition, and the two sides of the third partition are the exhaust air outlet chamber and the fresh air outlet chamber; a fresh air fan disposed within the fresh air outlet chamber for allowing air to flow from the outdoor space into the fresh air inlet chamber and through the heat exchange core, and then discharge it into the indoor space through the fresh air outlet chamber; and an exhaust fan disposed within the exhaust air outlet chamber for allowing air to flow from the indoor space into the exhaust air inlet chamber and through the heat exchange core, and then discharge it into the outdoor space through the exhaust air outlet chamber.

[0007] The first angle is connected to the first side wall of the casing; the angle between the side of the heat exchange core facing the fresh air inlet cavity and the first side wall is α, and the angle between the side of the heat exchange core facing the exhaust air inlet cavity and the first side wall is β, where α > β.

[0008] The total heat exchanger also includes an electrical box, which is located between the exhaust fan and the third partition.

[0009] In this technical solution, by adjusting the heat exchange core at a small angle to make α > β, the electrical box is installed in the exhaust air cavity. Since the electrical box is close to the third partition, it only affects the edge of the heat exchange core, effectively reducing the obstruction of indoor air by the electrical box.

[0010] In some embodiments, the distance from the exhaust fan to the third partition is greater than the distance from the fresh air fan to the third partition, and the electrical box is located between the exhaust fan and the third partition.

[0011] In this technical solution, by limiting the position of the third partition, the electrical box can be accommodated between the exhaust fan and the third partition without having to increase the size of the casing to accommodate the electrical box, thus realizing the design of a miniaturized total heat exchanger with a built-in electrical box.

[0012] In some embodiments, the housing includes: a base plate having a maintenance opening thereon; a maintenance plate covering the maintenance opening and connected to the base plate; and a slide rail on the housing for inserting an electrical box.

[0013] Projected onto the base plate, the heat exchange core is located inside the maintenance port, and the area where the extension line of the slide rail coincides with the maintenance port is larger than the projected area of ​​the electrical box; after the heat exchange core is disassembled, the electrical box can be removed from the maintenance port.

[0014] In this technical solution, after removing the heat exchange core, the operator can take out the electrical box from the maintenance port to perform maintenance on the electrical box. The heat exchange core and electrical box can be disassembled and assembled through the maintenance board of a small noodle machine, which is suitable for maintenance in narrow spaces and has stronger adaptability and versatility.

[0015] In some embodiments, the slide rail includes: a first slide rail disposed on the inner top wall of the housing for engaging with the upper end of the electrical box; and a second slide rail disposed on the inner bottom wall of the housing for engaging with the lower end of the electrical box.

[0016] The ends of the first slide rail and the second slide groove that are closest to the heat exchange core are both flared outwards.

[0017] In this technical solution, the upper and lower ends of the electrical box are inserted into the slide rail, which makes it easy to remove the electrical box along the slide rail and realizes the maintainability of the electrical box; the ends of the slide rail are outwardly flared, which guides the electrical box into the slide rail and facilitates the installation of the electrical box into the slide rail.

[0018] In some embodiments, the slide rail is U-shaped, and the electrical box is positioned between the two side walls of the slide rail.

[0019] In some embodiments, the end of the partition is provided with a slot, and the corner of the heat exchange core abuts against the slot; the lower end of the slot extends through, so that the heat exchange core can be dislodged downwards and from the maintenance port.

[0020] In this technical solution, the fit between the heat exchange core and the slot facilitates the maintenance of the heat exchange core.

[0021] In some embodiments, a filter is also included for filtering air, the filter being disposed close to the heat exchange core; projected onto the surface of the base plate, the filter is located within the service port;

[0022] The housing has a slot extending along the height direction, into which the end of the filter is inserted. The lower end of the slot is open so that the filter can be removed downwards and from the service port.

[0023] In this technical solution, the way the filter and the slot fit together facilitates the maintenance of the filter.

[0024] In some embodiments, the portion of the electrical box is projected onto the surface of the base plate, coinciding with the maintenance port.

[0025] In this technical solution, operators can observe the electrical box through the maintenance port, which facilitates accurate positioning of the electrical box and improves the efficiency of disassembly and assembly.

[0026] In some embodiments, 1.5 ≤ α / β ≤ 1.6.

[0027] In this technical solution, by adjusting the angle of the heat exchange core, the resistance difference between the fresh air duct and the exhaust air duct is 1.8Pa, which effectively reduces the resistance difference between the fresh air duct and the exhaust air duct, achieves a balance between the resistance and air volume on both sides, and helps the system to operate efficiently, stably, and with low noise.

[0028] In addition, by adjusting the angle of the heat exchange core, the fresh air supply rate reaches over 98%, the airflow uniformity of the fresh air inflow surface of the heat exchange core is significantly improved, and the impact on the airflow uniformity of the exhaust duct is minimal.

[0029] In some embodiments, the connection position between the first corner and the first sidewall is taken as the first dividing position P1. The first sidewall includes a first fresh air wall section and a first exhaust air wall section located on both sides of the first dividing position P1. Projected on the bottom surface of the casing, the length of the first fresh air wall section is a1, the length of the first exhaust air wall section is a2, and 1.15≤a2 / a1≤1.25.

[0030] In this technical solution, within this ratio range, the resistance difference between the fresh air duct and the exhaust air duct can be reduced while the increase in the resistance of the exhaust air duct can be suppressed. Attached Figure Description

[0031] Figure 1 and Figure 2 A perspective view of a total heat exchanger according to some embodiments is shown;

[0032] Figure 3 A bottom view of a total heat exchanger according to some embodiments, omitting the base plate, is shown;

[0033] Figure 4 A bottom view of the casing and heat exchange core of a total heat exchanger according to some embodiments is shown;

[0034] Figure 5 A bottom view of a total heat exchanger according to some other embodiments, omitting the base plate, is shown;

[0035] Figure 6 A bottom view of a total heat exchanger according to some embodiments, omitting the maintenance plate, is shown;

[0036] Figure 7 An exploded view of the electrical box and housing of a total heat exchanger according to some embodiments is shown;

[0037] Figure 8 A perspective view of the support structure of a total heat exchanger according to some embodiments is shown;

[0038] Figure 9 A top view of the support structure of a total heat exchanger according to some embodiments is shown;

[0039] Figure 10 A perspective view of a fourth partition and a first insert of a total heat exchanger according to some embodiments is shown;

[0040] Figure 11 A top view of the fourth partition and the first insert of a total heat exchanger according to some embodiments is shown;

[0041] Figure 12 A perspective view of a second partition and a second insert of a total heat exchanger according to some embodiments is shown;

[0042] Figure 13 A top view of the second partition and the second insert of a total heat exchanger according to some embodiments is shown;

[0043] Figure 14 and Figure 15 A perspective view of a fan for a total heat exchanger according to some embodiments is shown;

[0044] Figure 16 A perspective view of the volute mounting plate and motor bracket of a total heat exchanger according to some embodiments is shown;

[0045] Figure 17 A perspective view of the motor bracket of a total heat exchanger according to some embodiments is shown;

[0046] Figure 18 A perspective view of the connection between the fan and the casing of a total heat exchanger according to some embodiments is shown;

[0047] Figure 19 A partial schematic diagram of the casing of a total heat exchanger according to some embodiments is shown. Detailed Implementation

[0048] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0049] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Hereinafter, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0053] Reference Figures 1 to 4 The total heat exchanger 100 according to an embodiment of this application includes a housing 101 forming the exterior. For example, the housing 101 may have a hexahedral shape. Since the total heat exchanger 100 is mostly used by being suspended in the ceiling, the dimension of the total heat exchanger 100 in the height direction Z is smaller than its dimensions in the other two directions (the first direction X and the second direction Y) to reduce the height space it occupies.

[0054] In some embodiments, housing 101 may include a first sidewall 107a, a second sidewall 107b, a third sidewall 107c, and a fourth sidewall 107d connected end to end. Housing 101 may include a top wall forming a top structure and a bottom wall forming a bottom structure.

[0055] The housing 101 includes: a fresh air inlet 101a for connecting to the outdoor space and drawing outdoor air OA into the interior of the housing 101; and a fresh air outlet 101b for connecting to the indoor space and expelling the outdoor air OA drawn into the housing 101 into the indoor space.

[0056] The housing 101 includes: an exhaust air inlet 101c, which is used to connect to an indoor space and draw indoor air RA into the housing 101; and an exhaust air outlet 101d, which is used to connect to an outdoor space and exhaust the indoor air RA drawn into the housing 101 to the outdoor space.

[0057] The casing 101 is divided into a fresh air inlet chamber 103, a fresh air outlet chamber 104, an exhaust air inlet chamber 105, and an exhaust air outlet chamber 106 by a partition.

[0058] The fresh air intake chamber 103 and the fresh air outlet chamber 104 are connected between the fresh air inlet 101a and the fresh air outlet 101b to form a fresh air duct. The fresh air duct is used to draw outdoor air OA into the room and guide it into the indoor space.

[0059] The exhaust air inlet chamber 105 and the exhaust air outlet chamber 106 are connected between the exhaust air inlet 201c and the exhaust air outlet 101d to form an exhaust air duct, which is used to guide indoor air RA to the outdoor space.

[0060] The total heat exchanger 100 may include two fans: a fresh air fan 120a, which is located inside the fresh air outlet chamber 104 and connected to the fresh air outlet 101b; and an exhaust fan 120b, which is located inside the exhaust outlet chamber 106 and connected to the exhaust outlet 101d.

[0061] The fresh air fan 120a can generate the air supply force required to exhaust air to the fresh air outlet 101b. The exhaust fan 120b can generate the air supply force required to exhaust air to the exhaust outlet 101d.

[0062] The total heat exchanger 100 may include a heat exchange core 130 for exchanging heat between outdoor air OA and indoor space RA. When operating in heat exchange mode, air in the fresh air duct and air in the exhaust air duct can exchange heat with each other in the heat exchange core 130.

[0063] Specifically, the interior of the housing 101 and the space where the heat exchange core 130 is installed are called the core installation cavity. A partition is disposed between the side wall of the housing 101 and the heat exchange core 130 to divide the space between the housing 101 and the heat exchange core 130 into a fresh air inlet cavity 103, a fresh air outlet cavity 104, an exhaust air inlet cavity 105, and an exhaust air outlet cavity 106.

[0064] The heat exchange core 130 connects the fresh air inlet chamber 103 and the fresh air outlet chamber 104. The heat exchange core 130 also connects the exhaust air inlet chamber 105 and the exhaust air outlet chamber 106. When the total heat exchanger 100 is in heat exchange mode, outdoor air OA flowing through the fresh air duct and indoor air RA flowing through the exhaust air duct exchange heat in the heat exchange core 130 without contact.

[0065] In some embodiments, the heat exchange core 130 is generally hexahedral in shape. The side of the heat exchange core 130 facing the fresh air inlet cavity 103 is the fresh air inflow surface 130a. The side of the heat exchange core 130 facing the exhaust air inlet cavity 105 is the exhaust air inflow surface 130b. The side of the heat exchange core 130 facing the fresh air outlet cavity 104 is the fresh air outlet surface 130c. The side of the heat exchange core 130 facing the exhaust air outlet cavity 106 is the exhaust air outlet surface 130d.

[0066] The fresh air inflow side 130a is opposite to the fresh air outflow side 130c. The exhaust air inflow side 130 is opposite to the exhaust air outflow side 130d.

[0067] The heat exchange core 130 has a first edge 131a, a second edge 131b, a third edge 131c, and a fourth edge 131d.

[0068] The angle at which the fresh air inflow surface 130a intersects the exhaust air inflow surface 130b is the first angle 131a. The angle at which the exhaust air inflow surface 130b intersects the fresh air outflow surface 130c is the second angle 131b. The angle at which the fresh air outflow surface 130c intersects the exhaust air outflow surface 130d is the third angle 131c. The angle at which the exhaust air outflow surface 130d intersects the fresh air inflow surface 130a is the fourth angle 131d.

[0069] In some embodiments, the total heat exchanger 100 may include a fresh air filter that captures foreign matter contained in outdoor air OA in a filtered manner. The fresh air filter may be disposed in the fresh air inlet chamber 103 and located between the fresh air inlet 101a and the heat exchange core 130.

[0070] In some embodiments, the total heat exchanger 100 may include an exhaust filter that captures foreign matter included in the indoor air RA in a filtered manner. The exhaust filter may be disposed within the exhaust air inlet chamber 105 and located between the exhaust air inlet 101c and the heat exchange core 130.

[0071] Fresh air filters and exhaust air filters may include at least one of high-efficiency filters and pre-filters.

[0072] The pre-filter uses non-woven fabric filter material, which can filter large particles of dust and insects in the air.

[0073] High-efficiency particulate air (HEPA) filters use glass fiber filter materials and melt-blown nonwoven filter materials to intercept particulate matter, bacteria, and viruses.

[0074] In some embodiments, the fresh air filter includes a pre-filter 141a and a high-efficiency filter 141b. The exhaust air filter includes a pre-filter 142a.

[0075] In some embodiments, the fresh air filter may be arranged parallel to the fresh air inflow surface 130a of the heat exchange core 130. The fresh air filter may be positioned close to the surface of the fresh air inflow surface 130a.

[0076] If there is a large gap between the fresh air filter and the heat exchange core 130, the outdoor air OA will experience flow separation when it flows out of the fresh air filter into the gap, and vortices may even be generated in the gap, resulting in poor airflow and high flow resistance. Therefore, in this application, the fresh air filter and the heat exchange core 130 are placed close to each other, which can make the airflow smoother, reduce flow separation and vortex generation, and reduce air flow resistance.

[0077] Specifically, the high-efficiency fresh air filter 141b faces the fresh air inflow surface 130a. The pre-filter 141a faces the side of the high-efficiency fresh air filter 141b that is away from the heat exchange core 130.

[0078] Similarly, by placing the pre-filter 141a and the high-efficiency filter 141b of fresh air close to each other in this application, the airflow can flow more smoothly, reducing flow diversion and eddy formation, and thus reducing airflow resistance.

[0079] In some embodiments, the exhaust filter may be arranged parallel to the exhaust inlet surface 130b of the heat exchange core 130. The exhaust filter may be close to the exhaust inlet surface 130b. This allows for smoother airflow, reduces flow diversion and eddy formation, and lowers airflow resistance.

[0080] In the above embodiments, when the fresh air fan 120a is running, outdoor air OA flows into the fresh air inlet cavity 104 through the fresh air inlet 101a and sequentially flows into the fresh air outlet cavity 104 through the fresh air pre-filter 141a, the fresh air high-efficiency filter 141b, and the heat exchange core 130, and is discharged into the indoor space through the fresh air fan 120a and the fresh air outlet 101b.

[0081] When the exhaust fan 120b is running, indoor air RA flows into the exhaust inlet chamber 105 through the exhaust inlet 101c, and then flows into the exhaust outlet chamber 106 through the exhaust pre-filter 142a and the heat exchange core 130 in sequence. Finally, it is discharged to the outdoor space through the exhaust fan 120b and the exhaust outlet 101d.

[0082] In some embodiments, the total heat exchanger 100 includes an electrical box 140 for implementing the electrical control functions of the total heat exchanger 100.

[0083] Normally, the electrical box 140 is external to the housing 101, meaning it is connected to the outer wall of the housing 101. This structure makes the electrical box 140 somewhat obtrusive, affecting the appearance of the heat exchanger 100 and increasing its overall size. If the electrical box 140 is internally placed within the housing 101, it would obstruct airflow, especially in miniaturized heat exchangers. To address this issue, this application proposes an inventive concept that, without changing the size of the housing 101, adjusts the internal layout of the heat exchanger 100 to internally house the electrical box 140 while reducing its impact on airflow.

[0084] In some embodiments, see specific references Figure 4 and Figure 5 The first corner 131a of the heat exchange core 130 is connected to the first side wall 107a of the housing 101. No partition is provided at the first corner 131a, and the two sides thereare the fresh air inlet chamber 103 and the exhaust air inlet chamber 105, respectively.

[0085] The angle between the fresh air inflow surface 130a of the heat exchange core 130 and the first sidewall 107a at the first corner 131a is α, and the angle between the exhaust air inflow surface 130b of the heat exchange core 130 and the first sidewall 107a at the first corner 131a is β, where α > β.

[0086] A third partition 110c is provided between the third corner 131c of the heat exchange core 130 and the third side wall 107c of the housing 101. That is, one end of the third partition 110c is connected to the third side wall 107c, and the other end of the third partition 110c abuts against the third corner 131c of the heat exchange core 130. The fresh air outlet chamber 104 and the exhaust air outlet chamber 106 are located on both sides of the third partition 110c.

[0087] The electrical box 140 is located between the exhaust fan 120b and the third partition 110c.

[0088] In this application, the first corner 131a is connected to the first sidewall 107a, and the partition is omitted, which can reduce the size of the fresh air inlet cavity 103 and the exhaust air inlet cavity 105, and increase the size of the fresh air outlet cavity 104 and the exhaust air outlet cavity 106.

[0089] Based on α = β, the heat exchange core 130 is rotated by a certain angle in the XY plane toward the exhaust air inlet cavity 103, with the first edge 131a as the base point, so that α > β. In this case, the third edge 131c, which is diagonally distributed with the first edge 131a, is closer to the second side wall 107b and farther away from the fourth side wall 107d, which reduces the volume of the fresh air outlet cavity 104 and increases the volume of the exhaust air outlet cavity 106, thereby providing space for the electrical box 140 within the exhaust air outlet cavity 106.

[0090] This application achieves the installation of the electrical box 140 in the exhaust air outlet cavity 106 by making a small angle adjustment to the heat exchange core 130. Since the electrical box 140 is close to the third partition 110c, it only affects the edge of the heat exchange core 130, effectively reducing the obstruction of the indoor air RA by the built-in electrical box 140.

[0091] Because the fresh air side has an additional high-efficiency fresh air filter 131b compared to the exhaust air side, the airflow resistance on the fresh air side is greater than that on the exhaust air side. If the electrical box 140 is placed in the fresh air inlet cavity 103 or the fresh air outlet cavity 104 of the fresh air duct, the electrical box 140 will increase the air resistance of the fresh air duct, causing the resistance difference between the fresh air side and the exhaust air side to increase further. This will cause the air velocity and air pressure on the fresh air and exhaust air sides to be inconsistent, thereby affecting the stability of the airflow and the contact time in the heat exchange core. Moreover, the imbalance of resistance on both sides will lead to a decrease in the heat exchange efficiency of the total heat exchanger.

[0092] If the electrical box 140 is placed in the exhaust air inlet cavity 105, then in order to reduce the obstruction of airflow by the electrical box 140, the volume of the exhaust air inlet cavity 105 needs to be increased. This will cause the volume of the fresh air outlet cavity 104 to decrease, making it unable to accommodate the fresh air fan 120a of the preset specifications, and will increase the air resistance of the fresh air duct.

[0093] In some embodiments, the distance from the fourth sidewall 107d to the third partition 110c is greater than the distance from the second sidewall 107b to the third partition 110c, which makes the length of the exhaust air outlet cavity 106 in the X direction greater than the length of the fresh air outlet cavity 104 in the X direction, thereby making the exhaust air outlet cavity 106 have space to accommodate the electrical box 140.

[0094] In some embodiments, the distance from the exhaust fan 120b to the third partition 110c is greater than the distance from the fresh air fan 120a to the third partition 110c, so that the electrical box 150 can be accommodated between the exhaust fan 120b and the third partition 110c without having to increase the size of the housing 101 in the first direction X to accommodate the electrical box 150, thus realizing the design of the miniaturized total heat exchanger 100 with the electrical box 150 built in.

[0095] In some embodiments, the connection point between the third partition 110c and the third sidewall 107c of the housing 101 is designated as the third dividing position P3. The third sidewall 107c includes a third fresh air wall section 109e and a third exhaust air wall section 109f located on both sides of the third dividing position P3. The length of the third exhaust air wall section 109f in the first direction X is b2, and the length of the third fresh air wall section 109e in the first direction X is b1.

[0096] In other words, projected onto the bottom surface of the casing 101, the extension line of the third partition 110c divides the third side wall 107c into the third fresh air wall section 109e and the third exhaust air wall section 109f. The length of the third exhaust air wall section 109f is b2, and the length of the third fresh air wall section 109e is b1.

[0097] Here, the plate body of the third partition 110c refers to the part of the third partition 110c used to separate the fresh air outlet cavity 104 and the exhaust air outlet cavity 106.

[0098] 1.15≤b2 / b1. If b2 / b1<1.15, the proportion of b2 in the first direction X of the third sidewall 107c decreases, which will cause the end of the third partition 110c connected to the third sidewall 107c to be closer to the exhaust fan 120b, thus making it impossible to install the electrical box 150 between the exhaust fan 120b and the third partition 110c.

[0099] In some embodiments, b2 / b1 ≤ 1.25. If b2 / b1 > 1.25, then the proportion of b1 in the first direction X of the third sidewall 107c decreases, which will result in a decrease in the spatial volume of the fresh air exhaust cavity 104 and increase the resistance of the outdoor fresh air OA through the fresh air duct.

[0100] In some embodiments, 1.15 ≤ b2 / b1 ≤ 1.25. Within this range, on the one hand, sufficient installation space can be reserved for the electrical box 140 in the exhaust air outlet cavity 105; on the other hand, the two included angles formed by the plate body of the third partition 110c and the heat exchange core 130 are relatively close, so that the third partition 110c has a smaller impact on the resistance of the fresh air side and the exhaust air side.

[0101] For example, the value of b2 / b1 can be 1.15, 1.2 or 1.25.

[0102] In some embodiments, b2 / b1 = a2 / a1, which can make the plate body of the third partition 110c and the third sidewall 107c form an angle of 90°.

[0103] In some embodiments, 1.5 ≤ α / β. The larger the α value and the smaller the β value, the larger the α / β ratio, and the better the airflow uniformity at the fresh air inflow surface 130a of the heat exchange core 130. 1.5 ≤ α / β can effectively improve the surface uniformity of fresh air in the heat exchange core 130.

[0104] In some embodiments, α / β ≤ 1.6. If α / β is too large, i.e. β is too small, it will greatly increase the resistance of indoor air RA in the exhaust air inlet cavity 105 and reduce the uniformity of the exhaust airflow on the exhaust air inlet surface 130b of the heat exchange core 130. Therefore, an upper limit value needs to be set for the α value.

[0105] In some embodiments, the resistance difference between the fresh air side and the exhaust air side can be balanced by setting the angle of the heat exchange core 130.

[0106] Specifically, 1.5 ≤ α / β ≤ 1.6, for example, α / β can take values ​​of 1.5, 1.52, 1.55, 1.57 or 1.6.

[0107] If 1 < α / β < 1.5, the resistance difference between the fresh air side and the exhaust air side can be reduced to some extent, but the resistance difference between the two sides is still relatively large; if α / β > 1.6, then the resistance on the exhaust air side will be greater than the resistance on the fresh air side.

[0108] Through experimental testing, after adjusting the angle of the heat exchange core 130, the resistance difference between the fresh air side and the exhaust air side is 1.8 Pa, which effectively reduces the resistance difference between the fresh air side and the exhaust air side, achieves a balance between the resistance and air volume on both sides, and helps the system to operate efficiently, stably, and with low noise.

[0109] Through experimental testing, after adjusting the angle of the heat exchange core 130, the net fresh air supply rate reached over 98%, the airflow uniformity of the fresh air inflow surface 130a was significantly improved, and the impact on the airflow uniformity of the exhaust side was minimal.

[0110] In some embodiments, the edges of the heat exchange core 130 are right angles, and α can be taken in the range of 54° to 55°.

[0111] When α = 55°, the resistance difference between the fresh air side and the exhaust air side can be reduced, the airflow uniformity on the fresh air inflow surface 130a is the best, and the impact on the airflow uniformity on the exhaust air side is small.

[0112] In some embodiments, the connection position between the first corner 131a and the first sidewall 107a is taken as the first dividing position P1. The first sidewall 107a may include a first fresh air wall section 109a and a first exhaust air wall section 109b located on both sides of the first dividing position P1.

[0113] The first fresh air wall section 109a is the part of the side wall that defines the fresh air inlet cavity 103, and the first exhaust air wall section 109b is the part of the side wall that defines the exhaust air inlet cavity 105.

[0114] The length of the first fresh air wall section 109a in the first direction X is a1, and the length of the first exhaust air wall section 109b in the first direction X is a2. The first direction X is parallel to the arrangement direction of the two fans, and the second direction Y is perpendicular to both the first direction X and the height direction Z.

[0115] In other words, projected onto the bottom surface of the casing, the length of the first fresh air wall section 109a is a1, and the length of the first exhaust air wall section 109b is a2.

[0116] 1.15≤a2 / a1. The first exhaust wall section 109b is longer than the first fresh air wall section 109a, which can increase the distance from the exhaust air inlet 101c to the exhaust air inflow surface 130b of the heat exchange core 130, so that the exhaust air flow can spread and diffuse towards the β angle, and reduce the air resistance on the exhaust side by increasing the volume of the exhaust air inlet cavity 105, thus suppressing the increase in exhaust side resistance caused by the above-mentioned α / β setting.

[0117] In some embodiments, a2 / a1 < α / β. If a2 / a1 is too large, the volume of the fresh air inlet cavity 103 will be too small, which will increase the air resistance of the fresh air inlet cavity 103. Therefore, a2 / a1 < α / β can avoid the increase in fresh air resistance caused by the small volume of the fresh air inlet cavity 103.

[0118] In some embodiments, 1.15≤a2 / a1≤1.25 can reduce the resistance difference between the fresh air side and the exhaust air side while suppressing the increase in exhaust air side resistance.

[0119] For example, the value of a2 / a1 can be 1.15, 1.2 or 1.25.

[0120] This application reduces the resistance difference between the fresh air side and the exhaust air side by adjusting the angle and position of the heat exchange core 130 within the housing 101, thereby achieving a balance between resistance and airflow and low-noise operation of the total heat exchanger 100.

[0121] In some embodiments, a second partition 110b is provided between the second corner 131b of the heat exchange core 130 and the second sidewall 107b of the housing 101. That is, one end of the second partition 110b is connected to the second sidewall 107b, and the other end of the second partition 110b is connected to the second corner 131b of the heat exchange core 130. The two sides of the second partition 110b are the exhaust air inlet chamber 105 and the fresh air outlet chamber 104.

[0122] A fourth partition 110d is provided between the fourth corner 131d of the heat exchange core 130 and the fourth side wall 107d of the housing 101. That is, one end of the fourth partition 110d is connected to the fourth side wall 107d, and the other end of the fourth partition 110d is connected to the fourth corner 131d of the heat exchange core 130. The two sides of the fourth partition 110d are the exhaust air outlet chamber 106 and the fresh air inlet chamber 103.

[0123] The first sidewall 107a, the second partition 110b, the third partition 110c and the fourth partition 110d of the housing 101 provide support for the heat exchange core 130 from four directions, so that the heat exchange core 130 is fixed inside the housing 101.

[0124] Partitions 110b, 110c, and 110d are provided between the other corners of the total heat exchanger 100 and the casing 101. This allows the fresh air outlet cavity 104 to accommodate the fresh air fan 120a, the exhaust air outlet cavity 106 to accommodate the exhaust fan 120b, and the layout of the fresh air fan 120a, the exhaust fan 120b, and the heat exchange core 130 to be compact and reasonable, thus avoiding obstruction of the air outlet of the heat exchange core 130 by the fresh air fan 120a and the exhaust fan 120b.

[0125] In some embodiments, the connection position between the second partition 110b and the second side wall 107b of the housing 101 is taken as the second dividing position P2. The second side wall 107b may include a second exhaust wall section 109c and a second fresh air wall section 109d located on both sides of the second dividing position P2.

[0126] The length of the second exhaust wall section 109c in the second direction Y is d1, and the length of the second fresh air wall section 109c in the second direction Y is d2.

[0127] In other words, projected onto the bottom surface of the housing 101, the extension line of the second partition 110b divides the second sidewall 107b into a second exhaust wall section 109c and a second fresh air wall section 109d. The length of the second exhaust wall section 109c is d1, and the length of the second fresh air wall section 109d is d2.

[0128] Here, the plate body of the second partition 110b refers to the part of the second partition 110b used to separate the exhaust air inlet chamber 105 and the fresh air outlet chamber 104.

[0129] d2 / d1≤1.85. If d2 / d1>1.85, then d1 is relatively small, and the second dividing position P2 is closer to the exhaust air inlet cavity 105. The volume of the exhaust air inlet cavity 105 is reduced, which will further increase the air resistance on the exhaust side.

[0130] Additionally, if d2 / d1 > 1.85, the portion of the second sidewall 107b used to define the exhaust and air inlet cavity 105 has a smaller dimension in the second direction Y, which will limit the area of ​​the exhaust and air inlet 101c on the second sidewall 107b.

[0131] Therefore, d2 / d1≤1.85 can reduce the air resistance on the exhaust side and allow for a larger exhaust inlet 101c to be installed on the second sidewall 107b.

[0132] In some embodiments, 1.75≤d2 / d1. If 1.75>d2 / d1, the angle between the second partition 110b and the second sidewall 107b on the exhaust air inlet cavity 105 side is small, which is not conducive to the flow of indoor air RA in the exhaust air inlet cavity 105. It does not have a beneficial effect on the exhaust air inlet cavity 105, and also reduces the volume of the fresh air outlet cavity 104, increasing the wind resistance on the fresh air side.

[0133] In some embodiments, 1.75≤d2 / d1≤1.85 can further suppress the increase in exhaust-side air resistance.

[0134] For example, d2 / d1 can take values ​​of 1.75, 1.78, 1.8, 1.83, and 1.85.

[0135] In some embodiments, the connection position between the fourth partition 110d and the fourth sidewall 107d of the housing 101 is designated as the fourth dividing position P4. The fourth sidewall 107d may include a fourth exhaust wall section 109g and a fourth fresh air wall section 109h located on both sides of the fourth dividing position P4. The length of the fourth exhaust wall section 109g in the second direction Y is c2, and the length of the fourth fresh air wall section 109h in the second direction Y is c1.

[0136] In other words, projected onto the bottom surface of the casing 101, the extension line of the fourth partition 110d divides the fourth side wall 107d into the fourth exhaust wall section 109g and the fourth fresh air wall section 109h. The length of the fourth exhaust wall section 109g is c2, and the length of the fourth fresh air wall section 109h is c1.

[0137] Here, the plate body of the fourth partition 110d refers to the part of the fourth partition 110d used to separate the fresh air inlet cavity 103 and the exhaust air outlet cavity 106.

[0138] 1.25≤c2 / c1≤1.35. Within this range, on the one hand, the two included angles formed by the plate body of the fourth partition 110d and the heat exchange core 130 are relatively close, so that the resistance of the fourth partition 110d on the fresh air side and the exhaust air side is small; on the other hand, it can make the plate body of the fourth partition 110d perpendicular or nearly perpendicular to the fourth side wall 107d, and the bending angle of the end of the fourth partition 110d connected to the fourth side wall 107d is easy to process and control.

[0139] For example, the value of c2 / c1 can be 1.25, 1.3 or 1.35.

[0140] In some embodiments, the second partition 110b, the third partition 110c, and the fourth partition 110d are also collectively referred to as partitions.

[0141] One end of the partition plate is connected to the side wall of the housing 101 by fasteners such as screws. The other end of the partition plate is provided with a slot. The edges of the heat exchange core 130 abut against the slot to support and fix the heat exchange core 130 by the partition plate 110.

[0142] In some embodiments, refer to Figure 2 and Figure 6 The housing 101 includes a base plate 108a. The base plate 108a has a through maintenance port 108b.

[0143] The housing 101 includes a service plate 108c. The service plate 108c covers the service port 108b and is connected to the base plate 108a.

[0144] Projected onto the base plate 108a, the heat exchange core 130 is located inside the service port 108b. The service plate 108c covers the heat exchange core 130 from below.

[0145] The lower end of the slot extends through, allowing the heat exchange core 130 to be dislodged downwards from the slot.

[0146] When the maintenance plate 108c is removed, the heat exchange core 130 faces downward and is detached from the housing 101 through the maintenance port 108b, so as to enable the inspection and maintenance of the heat exchange core 130.

[0147] In some embodiments, fresh air filters and exhaust air filters are also referred to as filters.

[0148] The housing 101 has a slot extending along the height direction, into which the end of the filter is inserted. The lower end of the slot is open so that the filter can be pulled out downwards.

[0149] Projected onto the base plate 108a, the filter is located inside the maintenance port 108b. A maintenance plate 108c covers the filter from below. When the maintenance plate 108c is removed, the filter faces downwards and detaches from the housing 101 through the maintenance port 108b to facilitate cleaning and maintenance. Specifically, the fresh air pre-filter 141a, the fresh air high-efficiency filter 141b, and the exhaust pre-filter 142a can all be removed from the maintenance port 108b for easy cleaning and maintenance.

[0150] In some embodiments, after the electrical box 150 is built into the housing 101, it is also necessary to enable the maintenance of the electrical box 150.

[0151] Reference Figure 7 The housing 101 is equipped with a slide rail 190 for inserting the electrical box 150. Projected onto the base plate 180a, the extension line of the slide rail 190 intersects with the service port 108b. After the heat exchange core 120 is removed, the electrical box 150 can be dislodged from the slide rail 190 by external force and removed. In other words, after removing the heat exchange core 130, the operator can remove the electrical box 150 from the service port 108b to perform maintenance on the electrical box 150.

[0152] In related technologies, a large maintenance plate is used to cover the heat exchange core 130, filter, and electrical box 150, resulting in a large maintenance plate area that makes it impossible to remove the maintenance plate in confined spaces. This application achieves the disassembly and assembly of the heat exchange core 130, filter, and electrical box 150 using a small maintenance plate for a noodle machine, making it suitable for maintenance in confined spaces and offering greater adaptability and versatility.

[0153] In some embodiments, when projected onto the base plate 180a, the overlapping area of ​​the extension line of the slide rail 190 and the maintenance port 108b is greater than the projected area of ​​the electrical box 150 on the base plate 180a, ensuring that the electrical box 150 can be removed from the maintenance port 108b; the operator only needs to pull the electrical box 150 from the maintenance port 108b to remove it, which improves the convenience of removing the electrical box 150.

[0154] In some embodiments, the slide rail 190 may include a first slide rail 191. The first slide rail 191 is disposed on the inner top wall of the housing 101 and is used to cooperate with the upper end of the electrical box 150.

[0155] The first slide rail 191 is roughly inverted "U" shaped, and the top wall of the first slide rail 191 is connected to the top wall of the housing 101 by screws.

[0156] A groove is formed between the two side walls of the first slide rail 191, and the top of the electrical box 150 is inserted into the groove of the first slide rail 191.

[0157] The slide rail 190 may include a second slide rail 192. The second slide rail 192 is disposed on the inner bottom wall of the housing 101 and is used to mate with the lower end of the electrical box 150.

[0158] The second slide rail 192 is roughly U-shaped, and its bottom wall is connected to the base plate 180a of the housing 101 by screws.

[0159] A groove is formed between the two side walls of the second slide rail 192, and the lower end of the electrical box 150 is inserted into the groove of the second slide rail 192.

[0160] In some embodiments, see specific references Figure 6 Projected onto the base plate 180a, in the assembled state, part of the electrical box 150 overlaps with the maintenance port 108b. In this way, the operator can see part of the electrical box 150 from the maintenance port 108b, which facilitates the accurate positioning of the electrical box 150 and improves the efficiency of disassembly and assembly of the electrical box 150.

[0161] In some embodiments, continue to refer to Figure 7 In order to avoid the maintenance opening 108b, the second slide rail 192 cannot extend to the maintenance opening 108b. Therefore, the length of the second slide rail 192 must be shorter than the length of the electrical box 150.

[0162] The length of the second slide rail 192 is not less than half the length of the electrical box 150, so as to ensure the reliability and stability of the second slide rail 192 in limiting the lower end of the electrical box 150.

[0163] In some embodiments, the length of the first slide rail 191 is not less than the length of the electrical box 150, so that the upper end of the electrical box 150 is fully inserted into the first slide rail 191, thereby ensuring the reliability and stability of the first slide rail 191 in limiting the upper end of the electrical box 150.

[0164] In some embodiments, the end of the slide rail 190 near the heat exchange core 130 has an outwardly flared portion 193 to facilitate the insertion of the electrical box 130 into the slide rail 190.

[0165] The slide rail 190 can be a sheet metal part. The outward expansion 193 can be formed by bending the side wall of the slide rail 190 outward.

[0166] In some embodiments, the width of the expansion portion 193 of the first slide rail 191 is smaller than the width of the expansion portion 193 of the second slide rail 192.

[0167] After the electrical box 150 is repaired, it needs to be reinstalled in the slide rail 190. Since the upper end of the electrical box 150 enters the first slide rail 191 first, and part of the first slide rail 191 can be observed from the maintenance port 108b, the outer extension 193 of the first slide rail 191 can be made narrower.

[0168] When the lower end of the electrical box 150 enters the second slide rail 192, the operator cannot see the second slide rail 192 from the maintenance port 108b. Therefore, the outer expansion 193 of the second slide rail 192 is made wider, and the electrical box 150 can enter the second slide rail 192 more easily under the guidance of the outer expansion 193.

[0169] In some embodiments, refer to Figure 5 , Figure 8 and Figure 9 A support member 160 is connected to the first side wall 107a of the housing 101 to support the first corner 131a of the heat exchange core 120.

[0170] The support member 160 includes a support body portion 1601, which may be plate-shaped. The support body portion 1601 can be connected to the first sidewall 107a by welding or screw connection.

[0171] The support member 160 may include a first support forming part 161, which is connected to the support body part 1601 at an angle, and the first support forming part 161 is inclined toward the exhaust and air inlet chamber 105.

[0172] The support member 160 may include a second support forming portion 162, which is connected to the support body portion 1601 at an angle. The second support forming portion 162 and the first support forming portion 161 are arranged vertically and in opposite directions of inclination. The second support forming portion 162 is inclined toward the fresh air inlet cavity 103.

[0173] A first slot 160a is formed between the extension lines of the first support forming portion 161 and the second support forming portion 162, and between the extension line of the first support forming portion 161 and the second support forming portion 162. The first corner 131a of the heat exchange core 120 is located within the first slot 160a.

[0174] The first support forming part 161 abuts against the exhaust air inflow surface 130b at the first corner 131a. The second support forming part 162 abuts against the fresh air inflow surface 130a at the first corner 131a.

[0175] In some embodiments, the support member 160 may include a third support forming portion 163. The third support forming portion 163 is connected to the support body portion 1601 at an angle. The third support forming portion 163 is disposed on the side of the second support forming portion 162 near the fresh air inlet cavity 103. The space between the third support forming portion 163 and the second support forming portion 162 forms a first fresh air filter slot 160b for inserting a fresh air filter 141.

[0176] In some embodiments, the support member 160 may include a fourth support body portion 164. The fourth support body portion 164 is connected to the support body portion 1601 at an angle, and is disposed on the side of the first support forming portion 161 near the exhaust air inlet cavity 105. The space between the fourth support body portion 164 and the first support forming portion 161 forms a first exhaust air filter slot 160c for inserting an exhaust air filter 142.

[0177] In this application, by integrating the slot of the limiting filter and the slot of the limiting heat exchange core 120 onto a support member 160, the connection structure of the filter and the heat exchange core 120 inside the housing 101 is simplified, and the assembly efficiency is improved.

[0178] In some embodiments, the angle between the first support forming portion 161 and the support body portion 1601 is β, such that the angle between the exhaust air inflow surface 130b and the first sidewall 107a is β. The angle between the second support forming portion 162 and the support body portion 1601 is α, such that the angle between the fresh air inflow surface 130a and the first sidewall 107a is α.

[0179] In some embodiments, the support member 160 may include a fifth support forming portion 165. The fifth support forming portion 165 is connected to the support body portion 1601 at an angle. The fifth support forming portion 165 is disposed on the side of the third support forming portion 163 away from the second support forming portion 162, and the space between the fifth support forming portion 165 and the third support forming portion 163 forms a second fresh air filter slot 160d.

[0180] The end of the pre-filter 141a near the first sidewall 107a is inserted into the second fresh air filter slot 160d. The end of the high-efficiency fresh air filter 141b near the first sidewall 107a is inserted into the first fresh air filter slot 160b.

[0181] In some embodiments, the support member 160 may be a sheet metal part. The first support forming part 161, the second support forming part 162, the third support forming part 163, the fourth support forming part 164, and the fifth support forming part 165 are respectively formed by bending a portion of the support body part 1601.

[0182] In some embodiments, the regions where the first support forming portion 161, the second support forming portion 162, the third support forming portion 163, the fourth support forming portion 164, and the fifth support forming portion 165 are located are spaced apart from the edge of the support body portion 1601. The structural strength of the support member 160 is ensured by providing a larger area for the support body portion 1601.

[0183] In some embodiments, refer to Figure 5 , Figure 10 and Figure 11 A first insert 170 is connected to the fourth partition 110d. A second slot 170a is formed between the end of the first insert 170 and the end of the fourth partition 110d, and the fourth corner 131d of the heat exchange core 120 is located in the second slot 170a.

[0184] In some embodiments, the first insert 170 is provided with a third fresh air filter slot 170b.

[0185] The third fresh air filter slot 170b and the first fresh air filter slot 160b are respectively located at both ends of the fresh air high-efficiency filter 141b. The end of the fresh air high-efficiency filter 141b closest to the fourth partition 110d is inserted into the third fresh air filter slot 170b.

[0186] In some embodiments, the first insert 170 is provided with a fourth fresh air filter slot 170c.

[0187] The fourth fresh air filter slot 170c and the second fresh air filter slot 160d are respectively located at both ends of the pre-filter 141a. The end of the pre-filter 141a closest to the fourth partition 110d is inserted into the fourth fresh air filter slot 170c.

[0188] In this application, the connection structure between the heat exchange core 120 and the filter at the fourth partition 110d is set on the first insert 170, which can reduce the number of connectors and simplify the product structure.

[0189] In some embodiments, the first insert 170 includes a first insert body 171. The first insert body 171 abuts against the plate of the fourth partition 110d and is connected to the fourth partition 110d by welding or screws or the like.

[0190] The first insert 170 may include a first inclined portion 172. The first inclined portion 172 is connected to the end of the first insert body portion 171 near the heat exchange core 120, and the first inclined portion 172 is connected to the first insert body portion 171 at an angle.

[0191] The end of the fourth partition 110d is provided with a first snap-fit ​​forming part 111. A second snap-fit ​​groove 170a is formed between the first snap-fit ​​forming part 111 and the first inclined part 172.

[0192] In some embodiments, the first insert 170 may include a second inclined portion 173. The second inclined portion 173 is connected to the middle portion of the first insert body portion 171, and the second inclined portion 173 is connected to the first insert body portion 171 at an angle.

[0193] A third fresh air filter slot 170b is formed between the second inclined portion 173 and the first inclined portion 172.

[0194] In some embodiments, the first insert 170 may include a third inclined portion 174. The third inclined portion 174 is connected at an angle to the first insert body portion 171. The third inclined portion 174 is located on the side of the second inclined portion 173 that is away from the first inclined portion 172.

[0195] A fourth fresh air filter slot 170c is formed between the second inclined portion 173 and the third inclined portion 174.

[0196] In some embodiments, the third support forming portion 163 is parallel to the second support forming portion 162; the first inclined portion 172 and the second inclined portion 173 are parallel, such that the fresh air inflow surface 130a is parallel to the fresh air high-efficiency filter 141b.

[0197] The fifth support forming part 165 is parallel to the third support forming part 163; the second inclined part 173 and the third inclined part 174 are parallel, so that the fresh air pre-filter 141a is parallel to the fresh air high-efficiency filter 141b.

[0198] In some embodiments, the first insert 170 may be a sheet metal part, and the first inclined portion 172, the second inclined portion 173, and the third inclined portion 174 may all be formed by bending a portion of the first insert body portion 171. The processing technology is simple and the manufacturing cost is low.

[0199] In some embodiments, the lower end of the third inclined portion 174 is provided with a first guide portion 1741 that bends away from the second inclined portion 173. The first guide portion 1741 can guide the fresh air pre-filter 141a to be inserted into the fourth fresh air filter slot 170c from below.

[0200] In some embodiments, refer to Figure 5 , Figure 12 and Figure 13 A second insert 180 is connected to the second partition 110b. A third slot 180a is formed between the second insert 180 and the end of the second partition 110d. The second edge 131b of the heat exchange core 130 is located in the third slot 180a.

[0201] In some embodiments, the second insert 180 is provided with a second exhaust air filter slot 180b. The second exhaust air filter slot 180b and the first exhaust air filter slot 160c are located at opposite ends of the exhaust air filter 142. One end of the exhaust air filter 142 near the second partition 110b is inserted into the second exhaust air filter slot 180b.

[0202] In some embodiments, the end of the second partition 110b near the heat exchange core 130 is provided with a second snap-fit ​​forming portion 112.

[0203] The second insert 180 includes a second insert body 181. The second insert body 181 is connected to the second snap-fit ​​forming part 112 of the second partition 110b by welding or screws or the like.

[0204] The second insert 180 includes a fourth inclined portion 182. The fourth inclined portion 182 is connected at an angle to the end of the second insert body portion 181.

[0205] A third slot 180a is formed between the fourth inclined portion 182 and the second insertion forming portion 112. The fourth inclined portion 182 abuts against the exhaust air inflow surface 130b of the heat exchange core 130, and the second insertion forming portion 112 abuts against the fresh air outflow surface 130c of the heat exchange core 120.

[0206] The second insert 180 includes a fifth inclined portion 183. The fifth inclined portion 183 is connected at an angle to the second insert body portion 181. A second exhaust filter slot 180b is formed between the fifth inclined portion 183 and the fourth inclined portion 182.

[0207] In some embodiments, the fourth support forming portion 164 is parallel to the first support forming portion 161; the fifth inclined portion 183 is parallel to the fourth inclined portion 182, such that the exhaust pre-filter 142a is parallel to the exhaust inflow surface 130b of the heat exchange core 130.

[0208] In some embodiments, the second insert 180 may be a sheet metal part, and the fourth inclined portion 182 and the fifth inclined portion 183 may be formed by bending the two ends of the second insert body portion 181, respectively.

[0209] In some embodiments, the lower end of the fifth inclined portion 183 is provided with a second guide portion 1831 that bends away from the fourth inclined portion 182. The second guide portion 1831 can guide the exhaust pre-filter 142a to be inserted into the second exhaust filter slot 180b from below.

[0210] The following is a detailed introduction to the fan:

[0211] In some embodiments, refer to Figure 14 , Figure 15The fresh air fan 120a and the exhaust fan 120b are centrifugal fans with the same structure.

[0212] The fan includes an impeller 121. The impeller 121 includes a disk and multiple blades connected to the outer periphery of the disk. The axis of the impeller 121 is parallel to the height direction.

[0213] The fan includes a volute 122. An impeller 121 is connected inside the volute 122. An air inlet 122a is provided on the bottom wall of the volute 122. Driven by the impeller 121, air can enter the volute 122 through the air inlet 122a.

[0214] There is a gap between the air inlet 122a and the bottom wall of the housing 101, so that air in the housing 101 can flow through the gap to the air inlet 122a. The air inlet 122a enables the fan to enter from the bottom.

[0215] The fan includes a volute fixing plate 123. The volute fixing plate 123 is connected to the upper end of the volute 122. The volute fixing plate 123 has a through-flow guide section 123a. The guide section 123a is vertically opposite to the guide air inlet 122a. Driven by the impeller 121, air can enter the volute 122 through the guide section 123a. The guide section 123a enables the fan to draw air upwards.

[0216] The fan includes a motor 124. The motor 124 is installed in the guide section 123a. The output shaft of the motor 124 is connected to the disc of the impeller 121 to serve as the driving source for the rotation of the impeller 121. When the motor 124 is energized, its output shaft rotates to drive the impeller 121 to rotate.

[0217] The fan includes a motor bracket 125. The motor bracket 125 is connected to the upper side of the volute fixing plate 123. The motor 124 is fixedly connected to the motor bracket 125.

[0218] In some embodiments, the motor bracket 125 includes a motor fixing portion 1251. The motor fixing portion 1251 extends laterally and is generally parallel to the plate body of the volute fixing plate 123, with a height-direction gap between the motor fixing portion 1251 and the volute fixing plate 123. The upper end of the motor 124 is located outside the guide portion 123a for connection with the motor fixing portion 1251.

[0219] The motor bracket 125 includes a bracket connecting portion 1253. The bracket connecting portion 1253 is located at both ends along the length of the motor bracket 125. The bracket connecting portion 1253 is connected to the volute fixing plate 123.

[0220] The motor bracket 125 includes an inclined portion 1252. The inclined portion 1252 is connected between the motor fixing portion 1251 and the bracket connecting portion 1252, and in the direction from the motor fixing portion 1251 to the bracket connecting portion 1252, the inclined portion 1252 is inclined from top to bottom.

[0221] The inclined portion 1252 is connected to the motor fixing portion 1251 at an obtuse angle. With a fixed length of the motor fixing portion 1251, the larger the angle between the inclined portion 1252 and the motor fixing portion 1251, the larger the space between the motor bracket 125 and the volute fixing plate 123. By setting the angle between the inclined portion 1252 and the motor fixing portion 1251 to an obtuse angle, the space between the motor bracket 125 and the volute fixing plate 123 can be increased while ensuring the bending strength of the motor bracket 125. This space is also the incoming flow space of the guide portion 123a, thus expanding the incoming flow space of the guide portion 123a and reducing the air intake resistance.

[0222] The inclined part 1252 is provided with a through opening 125a for air circulation, so as to reduce the obstruction of the air on the upper side of the fan by the motor bracket 125, thereby reducing the resistance of the air intake on the upper side of the fan and increasing the air intake volume of the fan.

[0223] In some embodiments, the width of the motor bracket 125 is greater than the radius of the motor 124. The wider width of the motor bracket 125 ensures its structural strength.

[0224] In some embodiments, one edge of the opening 125a is located at one end of the connecting bracket connecting portion 1253 of the inclined portion 1252.

[0225] The opening 125a is U-shaped on the inclined part 1252, and the side surface of the opening 125a is connected to the bottom surface by an arc.

[0226] In some embodiments, when projected onto the plate surface of the fixed plate body 1231, the area of ​​the opening 125a is S1, the area of ​​the inclined portion 1252 is S2, and 0.3S2≤S1.

[0227] If 0.3S2 > S1, then the area of ​​the opening 125a is relatively small in proportion to the inclined portion 1252, and its function of reducing airflow obstruction will be greatly weakened.

[0228] In some embodiments, S1 ≤ 0.35S2. If S1 > 0.35S2, then the setting of the opening 125a will affect the structural strength of the inclined portion 1252.

[0229] In some embodiments, 0.3S2≤S1≤0.35S2 can maximize the area of ​​the opening 125a without affecting the structural strength of the motor bracket 125.

[0230] In some embodiments, the width k1 of the opening 125a and the width k2 of the inclined portion 1252 satisfy: 0.45k2≤k1.

[0231] If 0.45k2 > k1, then the width of the opening 125a accounts for a small proportion of the inclined portion 1252. While ensuring the area of ​​the opening 125a, the length of the opening 125a accounts for a large proportion of the inclined portion 1252. The opening 125a is slit-shaped, which is not conducive to the rapid flow of air. Moreover, the distance from the opening 125a to the motor fixing portion 1251 is small, which has a significant impact on the structural strength of the motor bracket 125.

[0232] In some embodiments, k1 ≤ 0.55K2. If k1 > 0.55K2, the width of the opening 125a accounts for a larger proportion of the inclined portion 1252, and the distance from the opening 125a to the edge of the inclined portion 1252 in the width direction is smaller, which makes this part prone to deformation and breakage.

[0233] In some embodiments, the edges of the motor fixing part 1251 and the inclined part 1252 are provided with upward flanges, which can enhance the structural strength of the motor bracket 125 and the flanges have less obstruction to airflow.

[0234] In some embodiments, the length of the motor fixing part 1251 is not greater than the diameter of the guide part 123a. If the length of the motor fixing part 1251 is relatively long, its bending strength cannot meet the usage requirements.

[0235] At least one bracket connection 1253 is adjacent to the edge of the volute fixing plate 123. This allows the inclined portion 1252 to be longer and the space between the motor bracket 125 and the volute fixing plate 123 to be larger, thereby increasing the inflow space at the top of the fan.

[0236] If the bracket connection part 1252 is close to the guide part 122a, the inclined part 1252 is short, and the space below the motor bracket 125 is small, the air intake resistance will increase, which is not conducive to the air intake of the fan from above.

[0237] In some embodiments, the angle θ between the inclined portion 1252 and the motor fixing portion 1251 satisfies: 150°≤θ.

[0238] While meeting the bending stiffness requirements of the motor bracket 125, the space below the motor bracket 125 should be as large as possible.

[0239] In addition, the larger θ results in a smaller degree of bending of the motor bracket 125, and the shape of the motor bracket 125 is close to a streamlined shape, which can effectively guide the airflow, reduce the separation and turbulence of the airflow when passing through the motor bracket 125, reduce the air intake resistance and noise, and increase the air intake volume of the fan.

[0240] In some embodiments, the motor bracket 125 may be a sheet metal part, the inclined portion 1252 may be formed by bending the end of the motor fixing portion 1251, and the bracket connecting portion 1252 may be formed by bending the end of the inclined portion 1252.

[0241] In some embodiments, the volute fixing plate 123 includes a fixing plate body 1231. A flow guide portion 123a is disposed on the fixing plate body 1231.

[0242] The volute fixing plate 123 includes multiple fixing plate connecting portions 1232. The fixing plate connecting portions 1232 extend upward from the edge of the fixing plate body 1231. The fixing plate connecting portions 1232 enhance the structural strength of the volute fixing plate 123. The fixing plate connecting portions 1232 are connected to the housing 101 to enable the installation of the fan within the housing 101.

[0243] Combined with reference Figure 16 The space between the multiple fixed plate connecting parts 1232 forms an airflow channel 123b. Air can flow through the airflow channel 123b to the airflow guide part 123a.

[0244] In some embodiments, refer to Figure 18 and Figure 19 In some embodiments, the fixing plate connection 1232 includes a first fixing plate connection portion 1234. The first fixing plate connection portion 1234 is located on the volute fixing plate 123 at one end away from the third partition 110c.

[0245] In some embodiments, two spaced-apart limiting clips 210 are connected to the inner wall of the housing 101, and one end of the volute fixing plate 123 with the first fixing plate connecting portion 1234 is limited between the two limiting clips 210, thereby restricting the movement of the volute fixing plate 123 in the second direction Y.

[0246] In some embodiments, the limiting clamp 210 includes a first limiting connection portion 211, which can be connected to the side wall of the housing 101 by welding or screws.

[0247] The limiting clamp 210 may include a second limiting connection part 212, which is connected to the bottom end of the first limiting connection part 211. The second limiting connection part 212 abuts against the bottom surface of the volute fixing plate 123 to provide upward support for the volute fixing plate 123 and restrict the downward movement of the volute fixing plate 123.

[0248] The limiting clamp 210 may include a third limiting connection part 213, which is connected to the first limiting connection part 211 and abuts against the end face of the volute fixing plate 123.

[0249] In some embodiments, the fixing plate connection portion 1232 may include a second fixing plate connection portion 1236, which is disposed on the edge of the volute fixing plate 123 near the heat exchange core 130.

[0250] A fixing connector 230 is connected to the inner top wall of the housing 101, and the second fixing plate connecting part 1236 is fastened to the fixing connector 230 by fasteners.

[0251] The connection between the fixed connector 230 and the second fixed plate connection part 1236 enables the volute fixed plate 123 to be securely connected within the housing 101, thus restricting the movement of the volute fixed plate 123. Since the second fixed plate connection part 1236 is close to the heat exchange core 130, it facilitates the removal and installation of screws at the second fixed plate connection part 1236 during maintenance.

[0252] In this application, the two limiting clamps 210 are engaged with the first fixed plate connecting part 1234 for limiting, and the fixed connecting part 230 is engaged with the second fixed plate connecting part 1236 for limiting. Thus, the two limiting clamps 210 and the fixed connecting part 230 form multi-point limiting on the volute fixed plate 123, which effectively restricts the multi-degree-of-freedom movement of the fan during operation. Moreover, it can absorb and attenuate the mechanical vibration generated during the operation of the fan, prevent the transmission of vibration energy to other structural components, and reduce the overall vibration level and noise.

[0253] Under the limiting structure of this application, the maximum FFT of the total heat exchanger 100 is reduced by 7dB(A) within 300Hz, the overall OA value is reduced by 1.5dB(A), and the low-frequency transmission sound is significantly improved.

[0254] In some embodiments, the width m of the second fixing plate connecting portion 1236 is not greater than its height h, so as to avoid the second fixing plate connecting portion 1236 blocking the air on the upper side of the fan as much as possible.

[0255] In some embodiments, the fixed connector 230 includes a first plate portion 231. The first plate portion 231 abuts against the top wall of the housing 101, and the two can be welded or connected by screws.

[0256] The fixed connector 230 includes a second plate portion 232. The second plate portion 232 extends vertically and is connected to the first plate portion 231. The first plate portion 232 abuts against the second fixed plate connecting portion 1236 and is detachably connected by screws.

[0257] In some embodiments, the fixing plate connecting portion 1232 includes a third fixing plate connecting portion 1233. The third fixing plate connecting portion 1233 is disposed at one end of the volute fixing plate 123 near the other fan, that is, the third fixing plate connecting portion 1233 is disposed at one end of the volute fixing plate 123 near the third partition 110c.

[0258] The third fixing plate connecting part 1233 and the first fixing plate connecting part 1234 are arranged along the first direction X.

[0259] Since the volute fixing plate 123 is connected to the housing 101 through the fixing plate connecting part 1232, the connection stability at the fixing plate connecting part 1232 is higher. The length direction of the motor bracket 125 is parallel to the first direction X, which allows the bracket connecting part 1253 to be closer to the fixing plate connecting part 1232, thereby ensuring the connection stability of the motor bracket 125.

[0260] In some embodiments, a mounting plate 220 is connected to the inner top wall of the housing 101. The mounting plate 220 can be connected to the housing 101 by welding or screws. The third fixing plate connecting part 1233 is hooked onto the mounting plate 220 in the direction pointing towards the first fixing plate connecting part 1234.

[0261] The mounting plate 220 can restrict the downward movement of the volute fixing plate 123 and restrict the movement of the volute fixing plate 123 away from the third partition plate 110c in the first direction X.

[0262] In this application, the limiting engagement of the first fixing plate connecting part 1234 on the volute fixing plate 123 with the limiting clamp 210, the hanging engagement of the third fixing plate connecting part 1233 with the hanging plate 220, and the screw connection of the second fixing plate connecting part 1236 with the fixing connector 230 realize the maintainability of the fan.

[0263] After the heat exchange core 130 is removed from the service port 108b, the operator only needs to unscrew the screws at the second fixing plate connecting part 1236, and then move the fan in the first direction X toward the direction of the third partition 110c. This will allow the first fixing plate connecting part 1234 to disengage from the limit clamp 210 and the third fixing plate connecting part 1233 to disengage from the hanging plate 220. Then the fan can be taken out from the service port 108b.

[0264] In some embodiments, the mounting plate 220 includes a first connecting plate body 221. The first connecting plate body 221 is connected to the housing 101.

[0265] The mounting plate 220 includes a second connecting plate body 222. The second connecting plate body 222 is located on the side of the first connecting plate body 221 near the third partition 110c. There is a gap between the second connecting plate body 222 and the inner top wall of the housing 101, so that the third fixing plate connecting part 1233 can abut against the upper end surface of the second connecting plate body 222.

[0266] The mounting plate 220 includes a third connecting plate 223 connected between the first connecting plate 221 and the second connecting plate 222. The upper end of the third fixing plate connecting part 1233 is provided with a laterally extending folded edge 1235. The lower surface of the folded edge 1235 abuts against the upper surface of the second connecting plate 222 to realize the mounting of the third fixing plate connecting part 1233 on the mounting plate 220.

[0267] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0268] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A total heat exchanger, characterized in that, include: The casing has a first side wall; The heat exchange core is disposed inside the housing; Multiple partitions divide the space between the housing and the heat exchange core into a fresh air inlet chamber, a fresh air outlet chamber, an exhaust air inlet chamber, and an exhaust air outlet chamber. A fresh air fan is installed inside the fresh air outlet cavity to allow air to flow from the outdoor space into the fresh air inlet cavity and through the heat exchange core, and then be discharged into the indoor space through the fresh air outlet cavity. An exhaust fan is installed inside the exhaust outlet cavity to allow air to flow from the indoor space into the exhaust inlet cavity and through the heat exchange core, and then be discharged to the outdoor space through the exhaust outlet cavity. The heat exchange core has a first edge and a third edge. The first edge is connected to the first side wall of the housing. The two sides of the first edge are the fresh air inlet cavity and the exhaust air inlet cavity. The partition connected to the third edge is the third partition. The two sides of the third partition are the exhaust air outlet cavity and the fresh air outlet cavity. The angle between the side of the heat exchange core facing the fresh air inlet cavity and the first sidewall is α, and the angle between the side of the heat exchange core facing the exhaust air inlet cavity and the first sidewall is β, where α > β; The total heat exchanger also includes an electrical box, which is located between the exhaust fan and the third partition.

2. The total heat exchanger according to claim 1, characterized in that, The housing includes: The base plate has a maintenance port. A maintenance plate is provided over the maintenance opening and connected to the base plate; The housing is provided with a slide rail for inserting the electrical box; Projected onto the surface of the base plate, the heat exchange core is located inside the maintenance port, and the area where the extension line of the slide rail coincides with the maintenance port is larger than the projected area of ​​the electrical box; After the heat exchange core is disassembled, the electrical box can be removed from the maintenance port.

3. The total heat exchanger according to claim 2, characterized in that, The slide rail includes: The first slide rail is located on the inner top wall of the housing and is used to cooperate with the upper end of the electrical box. The second slide rail is located on the inner bottom wall of the housing and is used to cooperate with the lower end of the electrical box. Both the first slide rail and the second slide rail have an outwardly flared end near the heat exchange core.

4. The total heat exchanger according to claim 2, characterized in that, The slide rail is U-shaped, and the electrical box is positioned between the two side walls of the slide rail.

5. The total heat exchanger according to claim 2, characterized in that, The end of the partition is provided with a slot, and the corner of the heat exchange core abuts against the slot; The lower end of the slot extends through, allowing the heat exchange core to detach downwards and from the maintenance port.

6. The total heat exchanger according to claim 2, characterized in that, It also includes a filter for filtering air, the filter being disposed close to the heat exchange core; The filter is located inside the maintenance port, projected onto the surface of the base plate. The housing has a slot extending along the height direction, the end of the filter is inserted into the slot, and the lower end of the slot is open so that the filter can be detached downwards and from the maintenance port.

7. The total heat exchanger according to claim 2, characterized in that, Projecting the electrical box onto the surface of the base plate, a portion of the electrical box coincides with the maintenance port.

8. The total heat exchanger according to claim 1, characterized in that, 1.5≤α / β≤1.6。 9. The total heat exchanger according to claim 1, characterized in that, The connection point between the first angle and the first sidewall is taken as the first dividing position P1. The first sidewall includes a first fresh air wall section and a first exhaust air wall section located on both sides of the first dividing position P1, projected onto the bottom surface of the casing. The length of the first fresh air wall section is a1, the length of the first exhaust air wall section is a2, and 1.15≤a2 / a1≤1.

25.

10. A total heat exchanger, characterized in that, include: The casing has a first side wall; The heat exchange core is disposed inside the housing; Multiple partitions divide the space between the housing and the heat exchange core into a fresh air inlet chamber, a fresh air outlet chamber, an exhaust air inlet chamber, and an exhaust air outlet chamber. A fresh air fan is installed inside the fresh air outlet cavity to allow air to flow from the outdoor space into the fresh air inlet cavity and through the heat exchange core, and then be discharged into the indoor space through the fresh air outlet cavity. An exhaust fan is installed inside the exhaust outlet cavity to allow air to flow from the indoor space into the exhaust inlet cavity and through the heat exchange core, and then be discharged to the outdoor space through the exhaust outlet cavity. The heat exchange core has a first edge and a third edge. The first edge is connected to the first side wall of the housing. The two sides of the first edge are the fresh air inlet cavity and the exhaust air inlet cavity. The partition connected to the third edge is the third partition. The two sides of the third partition are the exhaust air outlet cavity and the fresh air outlet cavity. The angle between the side of the heat exchange core facing the fresh air inlet cavity and the first sidewall is α, and the angle between the side of the heat exchange core facing the exhaust air inlet cavity and the first sidewall is β, where α > β; The distance from the exhaust fan to the third partition is greater than the distance from the fresh air fan to the third partition; the total heat exchanger also includes an electrical box, which is located between the exhaust fan and the third partition.

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