Heat exchange unit and ventilation device

Abstract

The application provides a heat exchange unit and a ventilation device. The heat exchange unit comprises a fixed frame provided with at least one group of air vents; and a heat exchange element rotatably arranged in the fixed frame and internally formed with at least one heat exchange air passage independent of each other, the heat exchange element selectively communicates the heat exchange air passage with the air vent group through rotation. The heat exchange unit can effectively prevent the heat exchange element from dewing and frosting, effectively improve the comfort of users and save production cost, has economic benefits and market competitiveness.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment, and more specifically, to a heat exchange unit and a ventilation device including the heat exchange unit. Background Technology

[0002] like Figure 1 As shown, Chinese Patent CN200510056824.1 discloses an air heat exchange device 1 implemented using conventional technology. This air heat exchange device 1 includes: a housing 11, an indoor air inlet 12, an outdoor air inlet 13, an indoor air outlet 14, an outdoor air outlet 15, a fan 16, and a heat exchange section 17. Driven by the fan 16, outdoor air sequentially passes through the outdoor air inlet 13, the heat exchange section 17, and the indoor air outlet 14 before entering the room (referred to as the intake airflow); conversely, indoor air sequentially passes through the indoor air inlet 12, the heat exchange section 17, and the outdoor air outlet 15 before being discharged to the outside (referred to as the exhaust airflow). The intake and exhaust airflows exchange heat with each other in the heat exchange section to reduce heat loss during ventilation.

[0003] In existing air heat exchange devices 1, the heat exchange section 17 is typically fixedly installed inside the housing 11. When the outdoor temperature is extremely cold and the indoor temperature is warm, the cold intake airflow, upon passing through the heat exchange section 17, experiences a significant temperature and humidity difference with the warm exhaust airflow. This causes some moisture to easily form water droplets on and around the surface of the heat exchange section 17, which can drip and cause inconvenience to the user if they flow outside the device. Alternatively, the moisture can easily form frost, adhering to the surface of the heat exchange section 17 and blocking its air ducts, thus reducing ventilation efficiency and heat exchange effectiveness. Therefore, to solve this problem, conventional technology involves installing a heater inside the air heat exchange device 1 to increase the temperature of the intake airflow, or switching to an internal recirculation mode for a certain period, i.e., not introducing outdoor air. This prevents or eliminates water droplets and frost on the heat exchange section 17.

[0004] However, installing a heater increases the cost of the air heat exchange device 1. In addition, switching to the internal circulation mode for a certain period of time will also pause the exchange of indoor and outdoor air, affecting the indoor ventilation effect. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The present invention provides a heat exchange unit and a ventilation device including the heat exchange unit, which does not require an additional heating element and can effectively prevent condensation or frost from forming on the heat exchange element while ensuring the amount of fresh air introduced, thereby solving the above-mentioned technical problems in the prior art.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, on the one hand, the present invention provides a heat exchange unit, including: a fixed frame having at least one set of vents; and a heat exchange element rotatably disposed in the fixed frame, and forming at least one independent heat exchange air passage inside, wherein the heat exchange element selectively connects the heat exchange air passage with the vents by rotating.

[0009] According to one embodiment, the heat exchange unit further includes: a movable member fixedly connected to the heat exchange element and rotatably disposed within a fixed frame; and a drive motor connected to the movable member to drive the movable member to rotate.

[0010] According to one embodiment, the heat exchange element includes: two heat exchange bottom surfaces disposed opposite to each other, and a plurality of heat exchange side surfaces disposed sandwiched between the two heat exchange bottom surfaces, wherein at least one of the plurality of heat exchange side surfaces is paired with each other to correspond to at least one heat exchange air passage, wherein the paired heat exchange side surfaces are provided with heat exchange ports communicating with the corresponding heat exchange air passages.

[0011] According to one embodiment, the movable member includes: a connecting portion for fixing and supporting the heat exchange bottom surface of the heat exchange element; a fitting portion extending from the edge of the connecting portion in a direction parallel to the edge formed by intersecting with the adjacent heat exchange side surface to fit detachably with the edge; and a motor connection portion formed on the connecting portion and connected to the shaft of the drive motor.

[0012] According to one embodiment, the mating portion is strip-shaped, and a mating groove is formed on the inner side of the mating portion facing the edge, wherein the mating groove and the edge fit together, and the cross-sectional shape of the mating groove is the same as the cross-sectional shape of the corner where the edge is located.

[0013] According to one embodiment, the number of mating portions is the same as the number of edges.

[0014] According to one embodiment, the connecting portion is formed as a circular flat plate covering the bottom surface of the heat exchanger.

[0015] According to one embodiment, the connector is provided with a positioning rib that protrudes inward from the inner side of the connector facing the heat exchange element, wherein the surrounding area of ​​the positioning rib forms the same shape as the bottom surface of the heat exchange.

[0016] According to one embodiment, the connecting portion is provided with a reinforcing rib that protrudes outward from the outer side of the connecting portion opposite to the inner side of the connecting portion, wherein the reinforcing rib extends between the motor connecting portion and the mating portion.

[0017] According to one embodiment, the heat exchange element is coupled together from opposite ends of the heat exchange element by two mating parts.

[0018] According to one embodiment, the fixed frame includes: two fixed frame bottom surfaces, which are disposed opposite to each other and are formed in a circular shape; and a fixed frame side surface, which is formed as a closed annular curved surface sandwiched between the two fixed frame bottom surfaces, wherein the ventilation port assembly includes two ventilation ports disposed opposite to each other on the fixed frame side surface.

[0019] According to one embodiment, the drive motor is fixedly mounted at the center of the bottom surface of the fixed frame, and the shaft of the drive motor passes through the center of the bottom surface of the fixed frame.

[0020] According to one embodiment, an airtight protective strip is provided on the inner side of the fixed frame, and the airtight protective strip is located between the ventilation openings.

[0021] According to one embodiment, the heat exchange element is formed in the shape of a quadrangular prism and includes a first heat exchange air passage and a second heat exchange air passage that are independent of each other, and the vent group includes a first vent group communicating with the first heat exchange air passage and a second vent group communicating with the second heat exchange air passage.

[0022] Another aspect of the present invention provides a ventilation device, comprising: a housing having an outdoor air inlet, an outdoor air outlet, an indoor air inlet, and an indoor air outlet; a fan for driving airflow within the housing; and a heat exchange unit disposed within the housing for heat exchange of the airflow within the housing, wherein the heat exchange unit is the aforementioned heat exchange unit.

[0023] According to one embodiment, the heat exchange unit is provided with a protruding piece; and the housing is provided with a fixing groove that engages with the protruding piece, wherein the heat exchange unit is fixed to the housing by the engagement of the protruding piece with the fixing groove.

[0024] According to one embodiment, an outdoor air inlet and an indoor air outlet are paired to correspond to one of at least a set of ventilation outlet groups; and an indoor air inlet and an outdoor air outlet are paired to correspond to another of at least a set of ventilation outlet groups.

[0025] (III) Beneficial Effects

[0026] Through the above-described technical solution of the present invention, the heat exchange element is rotatably mounted within a fixed frame, and rotation allows selective connection between the internal heat exchange airflow path of the heat exchange element and the external ventilation vents. When the temperature of the heat exchange element is uneven due to a large temperature difference between different external ventilation vents, rotating the heat exchange element selectively connects the internal heat exchange airflow path with the external ventilation vents, reducing the internal temperature difference of the heat exchange element. On the one hand, no additional heating element is required; on the other hand, ventilation does not need to be stopped, thus effectively preventing condensation and frosting on the heat exchange element, thereby improving user comfort and saving production costs, resulting in economic benefits and market competitiveness. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a hot air heat exchange device based on existing technology;

[0028] Figure 2 This is a schematic diagram of the ventilation device according to the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the heat exchange unit according to the present invention;

[0030] Figure 4 It is based on Figure 3 The diagram shown is an exploded view of the heat exchange unit.

[0031] Figure 5 This is a schematic diagram of the structure and airflow of the heat exchange element according to the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the movable component according to the present invention, viewed from one direction.

[0033] Figure 7 This is a schematic diagram of the structure of the movable component according to the present invention, viewed from another direction.

[0034] Figure 8 This is a structural schematic diagram of the fixed frame according to the present invention;

[0035] Figure 9 It is along Figure 2 A cross-sectional schematic diagram of the heat exchange unit cut by the D-D' wire and schematic diagrams of the heat exchange element before and after rotation;

[0036] Figure 10 This is a schematic diagram of the airflow path of the ventilation device according to the present invention;

[0037] Figure 11 It is based on Figure 10 A schematic diagram of the air vent after the heat exchange element in the ventilation device is rotated 90° clockwise.

[0038] The reference numerals in the attached figures are as follows:

[0039] <Existing Technology>

[0040] 1: Air heat exchange device; 11: Housing; 12: Indoor air inlet; 13: Outdoor air inlet; 14: Indoor air outlet; 15: Outdoor air outlet; 16: Fan; 17: Heat exchange section.

[0041] <Invention>

[0042] 10: Ventilation device; 100: Housing; 101: Indoor air inlet; 102: Outdoor air outlet; 103: Outdoor air inlet; 104: Indoor air outlet; 110: Rear side; 120: Left side; 130: Top side; 200: Heat exchange unit; 210: Fixed frame; 220: Heat exchange element; 230: Movable component; 240: Drive motor; 250: Airtight protective strip; 2010: Heat exchange bottom surface; 2011: First heat exchange bottom surface; 2012: Second heat exchange bottom surface. 2020: Heat exchange bottom surface; 2021: First heat exchange side surface; 2022: Second heat exchange side surface; 2023: Third heat exchange side surface; 2024: Fourth heat exchange side surface; 2030: Edge; 2031: First edge; 2032: Second edge; 2033: Third edge; 2034: Fourth edge; 2040: Heat exchange port; 2050: Heat exchange air passage; 2051: First heat exchange air passage; 2052: Second heat exchange air passage; 3010: Connecting part; 3020: Fitting part; 3110: Inner side of the connecting part; 3210: Outer side of the connecting part; 3120: Inner side of the fitting part; 3220: Outer side of the fitting part; 3021: First fitting part; 3022: Second fitting part; 3023: Third fitting part; 3024: Fourth fitting part; 3025: Fitting groove; 3025-1: Groove piece; 3030: Motor connection part; 3040: Positioning rib; 3041: First positioning rib; 3042: Second positioning rib; 3043: Third positioning rib ; 3044: Fourth positioning rib; 3050: Reinforcing rib; 1010: Fixed frame bottom surface; 1020: Fixed frame side surface; 1030: Ventilation port assembly; 1031: First ventilation port; 1032: Second ventilation port; 1033: Third ventilation port; 1034: Fourth ventilation port; 1040: Motor hole; 1050: Motor fixing part; 1060: Ventilation port gap; 310: Protruding piece; 320: Fixing groove; 1000: Air inlet path; 2000: Air outlet path; 300: Fan. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Furthermore, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] The terms “first” and “second” used in this article are for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] To clearly illustrate the technical content and effects of this disclosure, the following will provide a detailed description of this disclosure with reference to specific embodiments and accompanying drawings. Furthermore, the following embodiments are merely one specific example of this disclosure and do not limit the technical scope of this disclosure.

[0046] In the accompanying drawings, secondary descriptions of the same symbol for the same component, as well as descriptions of components not directly related to this disclosure, will be omitted or simplified. In the following description, directional terms such as up, down, left, right, above, and below will be used in accordance with the accompanying drawings of this disclosure.

[0047] The heat exchange unit according to the present invention and the ventilation device including the heat exchange unit are described in detail below with reference to the accompanying drawings.

[0048] First, through Figure 2 The overall structure of the ventilation device of the present invention will be described. Figure 2 This is a schematic diagram of the ventilation device according to the present invention.

[0049] The ventilation device 10 of this invention can be applied to general household ventilation equipment. It can be wall-mounted or placed directly on the floor, or placed in storage spaces such as above the ceiling or below the floor. It connects to ventilation ducts to exchange indoor and outdoor air. Simultaneously, the ventilation device 10 also includes a heat exchange unit 200 for recovering and utilizing air heat energy to regulate the temperature and humidity of the air delivered indoors. In addition, the ventilation device 10 may also include other regulating units that perform functions such as dehumidification, humidification, and disinfection of the air.

[0050] The ventilation device 10 includes: a housing 100, a fan 300, and a heat exchange unit 200.

[0051] The housing 100 forms the outer shell of the ventilation device 10 and is a three-dimensional box-shaped structure composed of six mutually enclosing faces. Specifically, the housing 100 is formed as a cuboid structure formed by six planes. Specifically, the housing 100 includes an outdoor air inlet 103, an indoor air inlet 101, an outdoor air outlet 102, and an indoor air outlet 104 disposed on the housing 100.

[0052] The outdoor air inlet 103 is an opening provided on the housing 100 to allow air from the outdoor space outside the housing 100 to enter the interior of the housing 100. It is located on one of the six faces forming the housing 100, for example, on the rear side 110 of the housing 100 in this embodiment.

[0053] The indoor air inlet 101 is an opening provided on the housing 100 to allow air from the indoor space outside the housing 100 to enter the interior of the housing 100. It is located on one of the six faces forming the housing 100, for example, on the left side face 120 of the housing 100 in this embodiment.

[0054] The outdoor air outlet 102 is an opening provided on the housing 100 to allow air inside the housing 100 to be discharged into the outdoor space outside the housing 100. It is located on one of the six faces forming the housing 100, for example, in this embodiment, it is located on the rear side 110 of the housing 100 (in... Figure 1 (The middle is blocked by the wind turbine).

[0055] The indoor air outlet 104 is an opening provided on the housing 100 to allow air inside the housing 100 to be discharged into the indoor space outside the housing 100. It is located on one of the six faces forming the housing 100, for example, on the upper side 130 of the housing 100 in this embodiment.

[0056] The number, positional relationship, and arrangement of the aforementioned indoor air outlet 104, outdoor air outlet 102, indoor air inlet 101, and outdoor air inlet 103 are not limited thereto, and those skilled in the art can design and adjust them as needed.

[0057] The fan 300 is located inside the housing 100 and is used to drive the airflow within the housing 100. In an embodiment of the present invention, it is a Sirocco multi-blade centrifugal fan. Figure 2 As shown, two fans are provided inside the housing 100, located downstream of the airflow near the air inlet and upstream of the airflow near the air outlet. The number, positional relationship, and arrangement of the fans are not limited to this and can be designed and adjusted as needed. Furthermore, according to other embodiments of the present invention, the fans can be located outside the housing.

[0058] The heat exchange unit 200 is located inside the housing 100 and is used for the transfer of heat (and humidity) from the air itself. Specifically, when there is a large temperature difference between indoor and outdoor air, the air passes through the heat exchange unit 200, enabling energy transfer between the two. For example, warm indoor air transfers its temperature to the cold outdoor air, raising the temperature of the outdoor air before it is released back into the indoor space, thereby improving user comfort and saving energy. According to the present invention, the heat exchange unit 200 is a rotary heat exchange unit.

[0059] Below, by combining Figure 3 and Figure 4 The overall structure of the heat exchange unit is described.

[0060] Figure 3 This is a schematic diagram of the structure of the heat exchange unit according to the present invention; Figure 4 It is based on Figure 3 The diagram shown is an exploded view of the heat exchange unit.

[0061] The heat exchange unit 200 includes a drive motor 240, a heat exchange element 220, a movable component 230, a fixed frame 210, and an airtight protective strip 250.

[0062] The drive motor 240 provides kinetic energy to the heat exchange unit 200 by connecting to a power source, and ultimately rotates the heat exchange element 220 (described in detail below). The drive motor 240 has a rotating shaft extending from the inside out.

[0063] The fixed frame 210 is provided with at least one set of vents 1030. The heat exchange element 220 is rotatably disposed within the fixed frame 210 and forms at least one independent heat exchange air passage 2050 inside the heat exchange element 220. The heat exchange element 220 can be rotated to selectively connect the internal heat exchange air passage 2050 with the vents 1030.

[0064] Specifically, the heat exchange element 220 is rotatably fixed to the fixed frame 210 via a movable member 230. For example, the movable member 230 is fixedly connected to the heat exchange element 220 and is rotatably disposed within the fixed frame 210.

[0065] The movable component 230 is connected to the drive motor 240, which drives the movable component 230 to rotate relative to the fixed frame 210. The movable component 230 is fixedly connected to the heat exchange element 220, so that when the movable component 230 rotates, it drives the heat exchange element 220 to rotate relative to the fixed frame 210. By rotating, the heat exchange element 220 can selectively connect its internal heat exchange air passage 2050 with the ventilation port group 1030 provided on the fixed frame 210.

[0066] Next, combined Figure 5 The heat exchange element 220 will be described. Figure 5 This is a schematic diagram of the structure and airflow of the heat exchange element according to the present invention.

[0067] The heat exchange element 220 is a laminated total heat exchange element used in fields such as ventilation or air conditioning. Specifically, it is formed by laminating and bonding basic structural components, such as planar segmented parts and cross-sectional wave-shaped spacer members, in an angle that is orthogonal to or close to the wave direction of the spacer members. In the adjacent passages formed by the spacer members of this total heat exchange element in the lamination direction, sensible and latent heat are exchanged between two fluids by airflows of different states (typically air with different temperature and humidity states) flowing through them, with the segmented parts acting as a medium.

[0068] The heat exchange element 220 according to this embodiment includes: two heat exchange bottom surfaces 2010 disposed opposite to each other; and a plurality of heat exchange side surfaces 2020 disposed sandwiched between the two heat exchange bottom surfaces 2010, wherein at least two of the plurality of heat exchange side surfaces 2020 are paired with each other to correspond to at least one heat exchange air passage.

[0069] Specifically, the heat exchange element 220 according to this embodiment is configured as a quadrangular prism, that is, it has a total of six surfaces, namely: a first heat exchange side surface 2021, a second heat exchange side surface 2022, a third heat exchange side surface 2023, a fourth heat exchange side surface 2024, a first heat exchange bottom surface 2011, and a second heat exchange bottom surface 2012.

[0070] The first heat exchange side 2021 and the third heat exchange side 2023 are two opposite sides of the heat exchange element 220 of the same size, and these two sides are connected to form the first heat exchange air passage 2051. The first heat exchange side 2021 and the third heat exchange side 2023 are covered with interconnected corrugated openings formed by stacking, namely heat exchange ports 2040. Air enters and exits the interconnected heat exchange ports 2040 to form the first heat exchange air passage 2051 formed by the connection of the first heat exchange side 2021 and the third heat exchange side 2023.

[0071] Similarly, the second heat exchange side 2022 and the fourth heat exchange side 2024 are two opposing sides of the heat exchange element 220 of the same size, and these two sides are connected to form a second heat exchange air passage 2052. The second heat exchange side 2022 and the fourth heat exchange side 2024 are covered with interconnected corrugated openings formed by stacking, i.e., heat exchange ports 2040. Air enters and exits the interconnected heat exchange ports 2040 to form the second heat exchange air passage 2052 formed by the interconnected second heat exchange side 2022 and the fourth heat exchange side 2024. In other words, according to the heat exchange element 220 of this embodiment, the first heat exchange side 2021, the second heat exchange side 2022, the third heat exchange side 2023, and the fourth heat exchange side 2024 are connected to each other in sequence, with the first heat exchange side 2021 and the third heat exchange side 2023 facing each other, and the second heat exchange side 2022 and the fourth heat exchange side 2024 facing each other. The first heat exchange air passage 2051, formed by the first heat exchange side 2021 and the third heat exchange side 2023, and the second heat exchange air passage 2052, formed by the second heat exchange side 2022 and the fourth heat exchange side 2024, are independent of each other. Air can enter the first heat exchange air passage 2051 through the heat exchange port 2040 on the first heat exchange side 2021 and exit through the heat exchange port 2040 on the third heat exchange side 2023; in addition, air can enter the second heat exchange air passage 2052 through the heat exchange port 2040 on the second heat exchange side 2022 and exit through the heat exchange port 2040 on the fourth heat exchange side 2024, and the air exchanges heat with each other in the first heat exchange air passage 2051 and the second heat exchange air passage 2052.

[0072] In addition, the heat exchange sides 2020 intersect to form multiple edges 2030. Specifically, the first heat exchange side 2021 and the second heat exchange side 2022 intersect to form a first edge 2031; the second heat exchange side 2022 intersects with the third heat exchange side 2023 to form a second edge 2032; the third heat exchange side 2023 and the fourth heat exchange side 2024 intersect to form a third edge 2033; and the fourth heat exchange side 2024 intersects with the first heat exchange side 2021 to form a fourth edge 2034.

[0073] The first heat exchange bottom surface 2011 and the second heat exchange bottom surface 2012 are two opposite sides of the heat exchange element 220 of the same size, and are disposed on its upper and lower sides in contact with the edges of the first heat exchange side surface 2021, the second heat exchange side surface 2022, the third heat exchange side surface 2023, and the fourth heat exchange side surface 2024. The first heat exchange bottom surface 2011 and the second heat exchange bottom surface 2012 are flat surfaces that are not ventilated.

[0074] Next, combined Figure 6 and Figure 7The active components are described. Figure 6 This is a schematic diagram of the structure of the movable component according to the present invention, viewed from one direction. Figure 7 This is a schematic diagram of the structure of the movable component according to the present invention, viewed from another direction.

[0075] The movable component 230 is driven by the drive motor 240 through the connection of the drive motor 240 and the heat exchange element 220. The movable component 230 includes: a motor connection part 3030, a connecting part 3010 and a fitting part 3020.

[0076] Specifically, the movable component 230 includes: a connecting portion 3010 for fixing and supporting the heat exchange bottom surface 2010 of the heat exchange element 220; a fitting portion 3020 extending from the edge of the connecting portion 3010 in a direction parallel to the edge 2030 of the heat exchange element 220 to fit detachably with the edge 2030; and a motor connection portion 3030 formed on the connecting portion 3010 and connected to the shaft of the drive motor 240.

[0077] The motor connection portion 3030 is used to connect to the shaft of the drive motor 240, thereby being driven to rotate by the drive motor 240. For example, in this embodiment, the motor connection portion 3030 is designed as a hole-like structure into which the shaft of the drive motor 240 is inserted. Furthermore, the shaft of the drive motor 240 and the motor connection portion 3030 are connected and fixed using a spiral design. However, the connection method between the shaft of the drive motor 240 and the motor connection portion 3030 is not limited to this; designers can easily make design adjustments based on the product's own structure or requirements.

[0078] The connecting portion 3010 is a circular plate-shaped structure with the motor connecting portion 3030 as its center. It connects the motor connecting portion 3030 and the mating portion 3020 (described in detail below), thereby driving the mating portion 3020 to move. The connecting portion 3010 fixably supports the heat exchange bottom surface 2010 of the heat exchange element 220. Therefore, the size of the connecting portion 3010 is just enough to cover the heat exchange bottom surface 2010 (first heat exchange bottom surface 2011 or second heat exchange bottom surface 2012) of the heat exchange element 220. When the heat exchange bottom surface 2020 is rectangular and the connecting portion is formed as a circular plate, the four corners of the heat exchange bottom surface 2020 are located on or close to the inner side of the periphery of the connecting portion 3010. The connecting portion 3010 has an inner surface 3110 and an outer surface 3210. The inner surface 3110 and the outer surface 3210 of the connecting part are opposite to each other.

[0079] The inner surface 3110 of the connecting part is the surface of the connecting part 3010 facing the heat exchange element 220. The inner surface 3110 of the connecting part is provided with a positioning rib 3040.

[0080] The positioning ribs 3040 are strip-shaped rib structures protruding from the inner side 3110 of the connecting portion towards the heat exchange element 220. Each of the positioning ribs 3040 connects end-to-end to form an enclosing shape, used to accommodate the heat exchange element 220, thereby fixing the heat exchange element 220 in its enclosing position. Therefore, the enclosing shape of the positioning ribs 3040 is the same as the shape of the heat exchange bottom surface 2010. Specifically, in this embodiment, the heat exchange bottom surface 2010 is rectangular. Therefore, there are four positioning ribs 3040, including a first positioning rib 3041, a second positioning rib 3042, a third positioning rib 3043, and a fourth positioning rib 3044, which enclose the heat exchange bottom surface 2010 to form a rectangle with the same shape as the heat exchange bottom surface 2010. Thus, after the heat exchange element 220 is placed within the enclosing space of the positioning ribs 3040, the heat exchange bottom surface 2010 of the heat exchange element 220 is blocked by the protruding positioning ribs 3040, and therefore cannot move outward, thereby achieving the function of positioning the heat exchange element 220. The positioning rib 3040 may extend between two adjacent mating portions 3020 to correspond to the respective heat exchange sides 2020 of the heat exchange element 220. Specifically, the first positioning rib 3041 corresponds to the edge where the first heat exchange side 2021 of the heat exchange element 220 intersects with the heat exchange bottom surface 2010, and protrudes towards the first heat exchange side 2021 to limit the movement of the first heat exchange side 2021; the second positioning rib 3042 corresponds to the edge where the second heat exchange side 2022 of the heat exchange element 220 intersects with the heat exchange bottom surface 2010, and protrudes towards the second heat exchange side 2022 to limit the movement of the second heat exchange side 2022; the third positioning rib 3043 corresponds to the edge where the third heat exchange side 2023 of the heat exchange element 220 intersects with the heat exchange bottom surface 2010, and protrudes towards the third heat exchange side 2023 to limit the movement of the third heat exchange side 2023; the fourth positioning rib 3044 corresponds to the edge where the fourth heat exchange side 2024 of the heat exchange element 220 intersects with the heat exchange bottom surface 2010, and protrudes towards the fourth heat exchange side 2024 to limit the movement of the fourth heat exchange side 2024.

[0081] The outer surface 3210 of the connecting part is the surface on the connecting part 3020 that is opposite to the inner surface 3110 of the connecting part. A reinforcing rib 3050 is provided on the outer surface 3210 of the connecting part.

[0082] The reinforcing rib 3050 is a strip-shaped rib structure protruding from the outer side surface 3210 of the connecting portion, and is used for reinforcing the strength of the connecting portion 3010. In this embodiment, there are four reinforcing ribs 3050 in total. Specifically, each reinforcing rib 3050 may extend between the motor connecting portion 3030 and the peripheral edge of the connecting portion 3010, and more specifically, each reinforcing rib 3050 may extend from the motor connecting portion 3030 to each engaging portion 3020 located at the peripheral edge of the connecting portion 3010. According to the arrangement of each engaging portion 3020 on the peripheral edge of the connecting portion 3010, each reinforcing rib 3050 may be formed into various shapes. For example, each reinforcing rib 3050 connects the motor connecting portion 3030 and the peripheral edge of the connecting portion 3010, and forms a "tic-tac-toe" shape with the peripheral edge of the connecting portion 3010.

[0083] The engaging portion 3020 is provided on the circumferential edge of the connecting portion 3010, extends from the peripheral edge of the connecting portion 3010 to detachably engage with the edge 2030 of the heat exchange element 220, and is used for connecting the connecting portion 3010 and the heat exchange element 220, fixing the position of the heat exchange element 220 by means of engagement, and driving the heat exchange element 220 to rotate at the same time. The engaging portion 3020 is a strip-shaped plate structure extending from the edge of the connecting portion 3010 along the edge 2030 of the heat exchange element 220 toward the heat exchange element 220, so as to clamp and engage the edge 2030 of the heat exchange element 220. The number of the engaging portions 3020 provided on each movable member 230 is the same as the number of the edges 2030 of the heat exchange element 220. Specifically, in this embodiment, the heat exchange element 220 is in a quadrangular prism shape, that is, it has four edges 2030, therefore the number of the engaging portions 3020 is set to four, and each engaging portion 3020 is provided corresponding to each edge 2030. Spaces are provided between the engaging portions 2030, which correspond to the heat exchange side surfaces 2020 of the heat exchange element 220, so as to allow airflow to pass through.

[0084] The mating portion 3020 includes a first mating portion 3021 corresponding to the first edge 2031, a second mating portion 3022 corresponding to the second edge 2032, a third mating portion 3023 corresponding to the third edge 2033, and a fourth mating portion 3024 corresponding to the fourth edge 2034. As described above, positioning ribs 3040 are provided on the inner surface 3110 of the connecting portion, and a plurality of positioning ribs 3040 extend between two adjacent mating portions 3020. Specifically, the first positioning rib 3041 extends between the fourth mating portion 3024 and the first mating portion 3021 to correspond to the first heat exchange side 2021; the second positioning rib 3042 extends between the first mating portion 3021 and the second mating portion 3022 to correspond to the second heat exchange side 2022; the third positioning rib 3043 extends between the second mating portion 3022 and the third mating portion 3023 to correspond to the third heat exchange side 2023; and the fourth positioning rib 3044 extends between the third mating portion 3023 and the fourth mating portion 3024 to correspond to the fourth heat exchange side 2024.

[0085] The mating part 3020 has an inner surface 3120 and an outer surface 3220. The inner surface 3120 is the surface of the mating part 3020 facing the heat exchange element 220. A mating groove 3025 is provided on the inner surface 3210.

[0086] The mating groove 3025 is used to fix the position of the edge 2030 of the heat exchange element 220 and simultaneously drive its rotation. The mating groove 3025 is formed on the inner surface 3120 of the mating portion and has a "V"-shaped cross-section to accommodate the edge 2030 of the heat exchange element 220. That is, the cross-section of the "V"-shaped space inside the mating groove 3025 has the same cross-section shape as the corner where the edge 2030 of the heat exchange element 220 is located, so that the edge 2030 of the heat exchange element 220 can be inserted into the mating groove 3025 and fixed in position by the mating groove 3025. The mating groove 3025 can extend entirely in the longitudinal direction of the inner surface 3120 of the mating portion, or it can extend partially in the longitudinal direction of the inner surface 3120 of the mating portion. That is, the mating groove 3025 can fit the entire edge 2030 or a section of the edge 2030. Each mating part 3020 is provided with a mating groove 3025. In other words, the number of mating grooves 3025 in each movable member 230 is the same as the number of edges 2030 in the heat exchange element 220. Specifically, in this embodiment, the heat exchange element 220 is a quadrangular prism, that is, it contains four edges 2030. Therefore, the number of mating grooves 3025 is set to four, and each mating groove 3025 is provided corresponding to each edge 2030.

[0087] As described above, the positioning rib 3040 extends between adjacent mating portions 3020. Specifically, when a mating groove 3025 is provided on the mating portion 3020, the end of the positioning rib 3040 can be connected to the mating groove 3025.

[0088] Specifically, the mating groove 3025 includes two angled slot pieces 3025-1. To achieve a better match between the mating groove 3025 and the edge 2030, the two slot pieces 3025-1 can be formed at the same angle as the angle where the edge 2030 is located, for example, a right angle. The two ends of the positioning rib 3040 can be connected to the corresponding slot pieces 3025-1 of the mating groove 3025 of the adjacent mating part 3020, so that the positioning rib 3040 and the mating groove 3025 are connected to each other to form an enclosing space, so that the heat exchange bottom surface 2010 of the heat exchange element 220 can be perfectly accommodated within the enclosing space. During installation, after the heat exchange element 220 is inserted into the mating groove 3025 from the end, it moves along the mating groove 3025 and finally reaches the enclosing space of the positioning rib 3040 and the mating groove 3025, further enhancing the positional fixation effect of the heat exchange element 220.

[0089] In this embodiment, a heat exchange element 220 is surrounded from both ends by two identical movable members 230. Specifically, one movable member 230 is inserted from the first heat exchange bottom surface 2011 of the heat exchange element 220, and the other movable member 230 is inserted from the second heat exchange bottom surface 2012 of the heat exchange element 220, until the mating portions 3020 of the two movable members 230 come into contact with each other, that is, the protrusion height of the mating portion 3020 is about half the length of the edge 2030 of the heat exchange element 220. Since the heat exchange element 220 itself has a certain weight, controlling the heat exchange element 220 by combining two movable members 230, compared with a design with only one movable member 230, can distribute the force borne by the mating portion 3020, preventing it from being damaged by excessive force. At the same time, the positioning ribs 3040 of the two connecting portions 3010 can fix the first heat exchange bottom surface 2011 and the second heat exchange bottom surface 2012 respectively, increasing the positioning effect of the heat exchange element 220.

[0090] In other embodiments of the present invention, the connecting portion 3010 may be a rectangle with the same shape and size as the heat exchange bottom surface 2010, while the fitting portion 3020 extends along the four corners of the connecting portion 3010 toward the heat exchange element 220 and fits the edge 2030 of the heat exchange element 220.

[0091] In other embodiments of the present invention, the fitting part 3020 may be omitted, and the heat exchange element 220 may be positioned and fixed entirely by the positioning rib 3040 on the connecting part 3010.

[0092] The above is a description of the structure of movable component 230. Below, we will combine... Figure 8 The fixed frame 210 will be described below. Figure 8 This is a structural schematic diagram of the fixed frame according to the present invention.

[0093] The fixed frame 210 surrounds the movable member 230, which is rotatably disposed within the fixed frame 210. The fixed frame 210 is cylindrical and is composed of two identical semi-cylindrical frames joined together. The fixed frame 210 includes a bottom surface 1010 and a side surface 1020.

[0094] Specifically, the fixed frame 210 includes: two fixed frame bottom surfaces 1010, which are arranged opposite each other and are formed in a circular shape; and a fixed frame side surface 1020, which is formed as a closed curved surface sandwiched between the two fixed frame bottom surfaces 1010. The ventilation opening assembly 1030 includes two ventilation openings that are arranged opposite each other on the fixed frame side surface 1020.

[0095] The bottom surface 1010 of the fixed frame is composed of two opposing circular planes of the cylindrical fixed frame 210. In the installed state of the heat exchange unit 200, the bottom surface 1010 of the fixed frame approaches and covers the connecting portion 3010 of the movable member 230. Since the fixed frame 210 surrounds the heat exchange element 220 and the movable member 230, allowing them sufficient space to rotate within the movable frame 210, the area of ​​the bottom surface 1010 of the fixed frame is larger than the area of ​​the connecting portion 3010. In this embodiment, considering the miniaturization of the overall volume of the fixed frame 210, the area of ​​the bottom surface 1010 is set to be slightly larger than the area of ​​the connecting portion 3010. The bottom surface 1010 of the fixed frame is provided with a motor hole 1040 and a motor fixing portion 1050.

[0096] The motor hole 1040 is located at the center of the bottom surface 1010 of the fixed frame, and is used to allow the shaft of the drive motor 240 to pass through so that it can be installed on the motor connection part 3030 of the movable member 230.

[0097] The motor mounting part 1050 is used to fix the drive motor 240 to the fixing frame 210. In this embodiment, the motor mounting part 1050 is provided with screw holes. At the same time, the drive motor 240 is also provided with holes for screws to pass through, so the drive motor 240 can be fixed to the fixing frame 210 by screws.

[0098] The side surface 1020 of the fixed frame is an arc-shaped surface sandwiched between the bottom surface 1010 of the fixed frame, thus forming the cylindrical side surface of the cylindrical fixed frame 210. The side surface 1020 of the fixed frame is provided with a ventilation opening assembly 1030 and a protruding piece 310.

[0099] Vent group 1030 is an opening for airflow, allowing air to pass smoothly through the opening of heat exchange unit 200. Specifically, air before entering heat exchange unit 200 first passes through vent group 1030, then enters heat exchange airflow path 2050 of heat exchange element 220. After heat or humidity transfer in heat exchange airflow path 2050, the air leaves heat exchange element 220 and is then discharged from heat exchange unit 200 through vent group 1030. Specifically, each vent group 1030 includes vents arranged opposite to each other on the side 1020 of the fixed frame. Air enters heat exchange unit 200 through one of the vents in vent group 1030 and exits heat exchange unit 200 through the other vent in vent group 1030; these two vents form a vent group 1030. In other words, the vents on the side 1020 of the fixed frame forming a complete airflow path constitute a vent group 1030. Air can enter the heat exchange air passage 2050 in the heat exchange element 220 through the vents provided on the side 1020 of the fixed frame. Therefore, in this embodiment, there are two sets of vent groups 1030, each vent group 1030 including two vents, that is, there are a total of four vents: a first vent 1031 corresponding to the first heat exchange side 2021; a second vent 1032 corresponding to the second heat exchange side 2022; a third vent 1033 corresponding to the third heat exchange side 2023; and a fourth vent 1034 corresponding to the fourth heat exchange side 2024. The first vent 1031 and the third vent 1033 are arranged opposite each other to form the first vent group, and the second vent 1032 and the fourth vent 1034 are arranged opposite each other to form the second vent group. Furthermore, the various vents are spaced apart, with the portion between the vents forming a fixed frame side 1020, defined as a vent gap 1060. The vent gap 1060 can align with the engaging portion 3020 on the movable member 230 when the heat exchange element 220 and the movable member 230 rotate together to a specific position, so that the heat exchange side 2020 of the heat exchange element 220 corresponds to the vent group 1030, preventing the vent gap 1060 from obstructing air from entering the heat exchange element 220. Therefore, the width of the vent gap 1060 is slightly greater than or equal to the width of the engaging portion 3020.

[0100] The protruding piece 310 is a sheet-like structure that protrudes outward from the side of the fixed frame 210, used to fix the fixed frame 210 in the ventilation device 10. Specifically, in this embodiment, the fixed frame 210 is composed of two semi-cylindrical frames. Therefore, in order to fix these two semi-cylindrical frames simultaneously, a protruding piece 310 is provided on the edge of the side 1020 of the fixed frame of each frame, and the two semi-cylindrical fixed frames (e.g., [missing information]) can be fixed simultaneously by engaging with the "Y"-shaped fixing groove 320 on the ventilation device 10. Figure 2(As shown in the enlarged view). Furthermore, the method by which the heat exchange unit 200 is fixed to the ventilation device 10 is not limited to this; those skilled in the art can adjust various fixing methods according to the product design.

[0101] As described above, the indoor air inlet 101 and the outdoor air outlet 102 provided on the ventilation device 10 are paired with each other to correspond to one of the groups of ventilation outlets 1030, for example, to the second group of ventilation outlets formed by the second ventilation outlet 1032 and the fourth ventilation outlet 1034; the outdoor air inlet 103 and the indoor air outlet 104 are paired with each other to correspond to the other group of ventilation outlets 1030, for example, to the first group of ventilation outlets formed by the first ventilation outlet 1031 and the third ventilation outlet 1033.

[0102] An airtight protective strip 250 is provided on the inner side of the fixed frame side 1020 facing the heat exchange element 220, and is located at the interval between the vents, that is, on the fixed frame side 1020 on both sides of the vents to prevent air leakage when entering the heat exchange element 220 from the vents. The airtight protective strip 250 is made of a tough material (e.g., rubber) to prevent air from leaking between adjacent vents. The airtight protective strip 250 is arranged in a direction parallel to the rotation shaft of the drive motor 240, and two airtight protective strips 250 are provided for each edge 2030 of each heat exchange element 220. When the edge of the heat exchange element 220 rotates to the position of the vent gap 1060, the airtight protective strips 250 are located on both sides of the edge and closely contact both sides of the mating portion 3020 of the movable member 230. That is, two airtight protective strips 250 are respectively set on both sides of the vent gap 1060 and the distance between them is approximately equal to the width of the mating portion 3020, so that air cannot escape from the gap between the fixed frame 210 and the mating portion 3020. At the same time, the tough material of the airtight protective strips 250 can also ensure that the heat exchange element 220 can pass smoothly when rotating without causing excessive obstruction.

[0103] The above is a structural description of each part of the heat exchange unit. Next, refer to... Figure 9 The rotation of the heat exchange unit of the present invention will be described. Figure 9 For along Figure 2 A cross-sectional schematic diagram of the heat exchange unit cut by the D-D' wire and schematic diagrams of the heat exchange element before and after rotation.

[0104] The heat exchange element 220 rotates around the center line connecting the first heat exchange bottom surface 2011 and the second heat exchange bottom surface 2012. This rotation axis is aligned with the center line connecting the connecting portion 3010 of the movable member 230, the center line connecting the bottom surface 1010 of the fixed frame, and the rotation axis of the drive motor 240. When the drive motor 240 is connected to power and started, its rotation axis rotates, causing the movable member 230 connected to the rotation axis to rotate. Since the movable member 230 is fixedly connected to the heat exchange element 220, the heat exchange element 220 also rotates accordingly. Meanwhile, the fixed frame 210 is fixed to the ventilation device 10 and does not move. Therefore, by rotating the heat exchange element 220, each heat exchange air path 2050 can switch to correspond to a different ventilation port group 1030.

[0105] Specifically, firstly, the first heat exchange side 2021 of the heat exchange element 220 corresponds to the first vent 1031 on the side 1020 of the fixed frame; the second heat exchange side 2022 corresponds to the second vent 1032 on the side 1020 of the fixed frame; the third heat exchange side 2023 corresponds to the third vent 1033 on the side 1020 of the fixed frame; and the fourth heat exchange side 2024 corresponds to the fourth vent 1034 on the side 1020 of the fixed frame. That is, the first heat exchange air passage 2051 inside the heat exchange element 220 connects to the first vent group on the fixed frame 210; and the second heat exchange air passage 2052 inside the heat exchange element 220 connects to the second vent group on the fixed frame 210.

[0106] After the heat exchange element 220 and the movable component 230 are rotated 90° clockwise, the first heat exchange side 2021 of the heat exchange element 220 corresponds to the fourth vent 1034 on the side 1020 of the fixed frame; the second heat exchange side 2022 corresponds to the first vent 1031 on the side 1020 of the fixed frame; the third heat exchange side 2023 corresponds to the second vent 1032 on the side 1020 of the fixed frame; and the fourth heat exchange side 2024 corresponds to the third vent 1033 on the side 1020 of the fixed frame. In other words, the first heat exchange air passage 2051 inside the heat exchange element 220 connects to the second vent group on the fixed frame 210; and the second heat exchange air passage 2052 inside the heat exchange element 220 connects to the first vent group on the fixed frame 210.

[0107] On the other hand, the rotation of the heat exchange element 220 is driven by the engagement of the movable member 230. With the provision of the movable member 230, there is no need to make special additional designs for the heat exchange element 220 itself. In other words, the heat exchange unit 200 can directly use the heat exchange element 220 commonly used in the field, thus improving its versatility.

[0108] Below, in conjunction with Figure 10 and Figure 11 The function and effects of the heat exchange unit of the present invention will be described in detail. Figure 10 This is a schematic diagram of the airflow path of the ventilation device according to the present invention; Figure 11 It is based on Figure 10 A schematic diagram of the airflow path after the heat exchange element in the ventilation device is rotated 90° clockwise.

[0109] The ventilation device 10 is generally used for air exchange between indoor and outdoor spaces, that is, to expel stale indoor air while introducing outdoor air into the room, thereby keeping the indoor air fresh and clean. The indoor air and the outdoor air simultaneously exchange heat and humidity through the heat exchange unit 200.

[0110] The heat exchange unit 200 is fixed to the housing 100 by a fixed frame 210, wherein the vents on the fixed frame 210 correspond to the air vents on the housing 100 to allow air to enter and exit the housing 100. Specifically, the outdoor air inlet 103 on the housing 100 corresponds to the first vent 1031 on the fixed frame 210; the outdoor air outlet 102 corresponds to the second vent 1032 on the fixed frame 210; the indoor air outlet 104 corresponds to the third vent 1033 on the fixed frame 210; and the indoor air inlet 101 corresponds to the fourth vent 1034 on the fixed frame 210.

[0111] Before the ventilation device 10 is turned on, the heat exchange unit 200 is first stopped at an angle, specifically, as shown in the figure. Figure 10 As shown, the first heat exchange side 2021 faces the first vent 1031, that is, the outdoor air inlet 103; the second heat exchange side 2022 faces the second vent 1032, that is, the outdoor air outlet 102; the third heat exchange side 2023 faces the third vent 1033, that is, the indoor air outlet 104; and the fourth heat exchange side 2024 faces the fourth vent 1034, that is, the indoor air inlet 101.

[0112] When the ventilation device 10 is activated, the fan 300 inside the housing 100 starts and drives airflow to form an airflow path. On one hand, air from the outdoor space enters the housing 100 through the outdoor air inlet 103, and then reaches the heat exchange unit 200. It passes through the first vent 1031 and the first heat exchange side 2021 in sequence before entering the first heat exchange air path 2051 within the heat exchange element 220 for heat exchange. Then, it passes through the third heat exchange side 2023 and the third vent 1033 in sequence before leaving the heat exchange element 220. The air is then driven by the fan 300 to flow through the indoor air outlet 104 and is discharged into the indoor space outside the housing 100. The airflow path from the outdoor air inlet 103 to the indoor air outlet 104 is the air inlet path 1000.

[0113] On the other hand, air in the indoor space enters the housing 100 through the indoor air inlet 101, and then, upon reaching the heat exchange unit 200, passes sequentially through the fourth vent 1034 and the fourth heat exchange side 2024 before entering the second heat exchange air path 2052 within the heat exchange element 220 for heat exchange. It then passes sequentially through the second heat exchange side 2022 and the second vent 1032 before leaving the heat exchange element 220. The air is then driven by the fan 300 to flow through the outdoor air outlet 102 and is discharged into the outdoor space outside the housing 100. The air path from the indoor air inlet 101 to the outdoor air outlet 102 is the exhaust air path 2000.

[0114] However, in cold seasons or regions, the air in outdoor spaces is cold, while the air in indoor spaces is warm. That is, the air entering from the indoor side air inlet 101 is warm, while the air entering from the outdoor side air inlet 103 is cold. The temperature difference between the air intake path 1000 and the air exhaust path 2000 is large. Therefore, the temperature of the first heat exchange side 2021 facing the cold outdoor air and its vicinity is low. When the warm indoor air enters the heat exchange element 220 from the fourth heat exchange side 2024 and flows through the first heat exchange side 2021 and its vicinity, condensation or even frost will form on the first heat exchange side 2021 and its vicinity after a period of time.

[0115] Therefore, in the heat exchange element 220 Figure 10 After the angle shown is held for a certain period of time, the angle of the rotating heat exchange element 220 is controlled. For example... Figure 11 As shown, rotating the heat exchange element 220 clockwise by 90° causes the cold first heat exchange side 2021 to rotate to face the indoor air inlet 101, thereby raising the temperature of the first heat exchange side 2021 and its vicinity by the warm indoor air, which can suppress the formation of condensation or even frost on the first heat exchange side 2021 and its vicinity.

[0116] At this time, the side facing the outdoor air inlet 103 is the second heat exchange side 2022. When... Figure 11 After the angle shown is held for a certain period of time, as in the case described above, condensation or even frost will form on the second heat exchange side 2022 and the heat exchange element 220 near it after a period of time. Therefore, the angle of the heat exchange element 220 is controlled to continue rotating.

[0117] The next rotation method can be set to rotate the heat exchange element 220 counterclockwise by 90°, thus restoring it to its original position. Figure 10 The angle shown can also be set to continue rotating the heat exchange element 220 clockwise by 90° so that the third heat exchange side 2023 faces the outdoor air inlet 103. In other words, the rotation of the heat exchange element 220 can be reciprocating or rotating in the same direction.

[0118] The time that the heat exchange element 220 stays at a certain angle can be adjusted according to the outdoor temperature. For example, the lower the outdoor temperature, the shorter the time that the heat exchange element 220 stays at a certain angle.

[0119] Furthermore, in conventional techniques in this field, to prevent condensation on heat exchange elements, the outdoor air inlet is typically closed to stop or reduce the introduction of cold outdoor fresh air, and the temperature of the heat exchange elements is increased by using warm indoor air. However, this method reduces the amount of fresh air introduced into the indoor space. Alternatively, heating components are installed inside the ventilation device to heat the elements; however, this method requires additional heating components, increasing production costs or manufacturing processes. Therefore, by using a rotary heat exchange unit, condensation and frost formation on the heat exchange elements can be effectively prevented. At the same time, the rotary heat exchange unit does not require sacrificing the amount of fresh indoor air introduced or adding other heating components, thereby effectively improving user comfort and saving production costs.

[0120] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0121] Furthermore, those skilled in the art should understand that the ordinal numbers used in the specification and claims, such as "first," "second," etc., to modify the corresponding elements, do not in themselves imply that the element has any ordinal number, nor do they represent the order of one element with another, or the order of manufacturing methods. The use of these ordinal numbers is merely to clearly distinguish one element with a certain name from another element with the same name. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit it. Although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat exchange unit, comprising: The fixed frame is equipped with at least one set of ventilation openings; as well as The heat exchange element is rotatably mounted within the fixed frame, and forms at least one independent heat exchange air passage inside. Its features are, The fixed frame includes: The bottom surfaces of two fixed frames are arranged opposite each other and form a circle; and The side of the fixed frame is formed into a closed annular curved surface sandwiched between the bottom surfaces of the two fixed frames; The ventilation vent group includes two ventilation vents that are oppositely disposed on the side of the fixed frame. An airtight protective strip is provided on the inner side of the side of the fixed frame, and the airtight protective strip is located between the ventilation vent groups. The heat exchange unit further includes: A movable component, fixedly connected to the heat exchange element and rotatably disposed within the fixed frame; and A drive motor is connected to the movable component to drive the movable component to rotate; The heat exchange element is rotated to selectively connect the heat exchange air path with the ventilation port group.

2. The heat exchange unit according to claim 1, characterized in that, The heat exchange element includes: Two heat exchange surfaces are positioned opposite each other. Multiple heat exchange sides are provided, sandwiched between two heat exchange bottom surfaces, and at least two of the multiple heat exchange sides are paired with each other to correspond to at least one heat exchange air passage. Among them, the two paired heat exchange sides are provided with heat exchange ports that connect to the corresponding heat exchange air paths.

3. The heat exchange unit according to claim 2, characterized in that, The active component includes: The connecting part provides a fixed support for the heat exchange bottom surface of the heat exchange element; The fitting portion extends from the edge of the connecting portion along a direction parallel to the edge formed by intersecting the adjacent heat exchange side surface, so as to detachably fit with the edge; and A motor connection portion is formed on the connecting portion and connected to the shaft of the drive motor.

4. The heat exchange unit according to claim 3, characterized in that, The mating portion is strip-shaped, and a mating groove is formed on the inner side of the mating portion facing the edge. The fitting groove and the edge fit together, and the cross-sectional shape of the fitting groove is the same as the cross-sectional shape of the corner where the edge is located.

5. The heat exchange unit according to claim 4, characterized in that, The number of the mating portions is the same as the number of the edges.

6. The heat exchange unit according to claim 3, characterized in that, The connecting portion is formed as a circular flat plate covering the bottom surface of the heat exchanger.

7. The heat exchange unit according to claim 6, characterized in that, The connecting part is provided with a positioning rib that protrudes inward from the inner side of the connecting part facing the heat exchange element. The positioning ribs surround the heat exchange bottom surface in the same shape.

8. The heat exchange unit according to claim 6, characterized in that, The connecting portion is provided with reinforcing ribs that protrude outward from the outer surface of the connecting portion, which is opposite to the inner surface of the connecting portion. The reinforcing rib extends between the motor connection portion and the mating portion.

9. The heat exchange unit according to claim 3, characterized in that, The heat exchange element is formed by two mating parts that fit together from opposite ends of the heat exchange element.

10. The heat exchange unit according to claim 1, characterized in that, The drive motor is fixedly installed at the center of the bottom surface of the fixed frame, and the shaft of the drive motor passes through the center of the bottom surface of the fixed frame.

11. The heat exchange unit according to any one of claims 1-10, characterized in that, The heat exchange element is formed in the shape of a square prism and includes a first heat exchange air passage and a second heat exchange air passage that are independent of each other. The ventilation vent group includes a first ventilation vent group connected to the first heat exchange air path and a second ventilation vent group connected to the second heat exchange air path.

12. A ventilation device, characterized in that, include: The housing is equipped with an outdoor air inlet, an outdoor air outlet, an indoor air inlet, and an indoor air outlet; A fan drives the airflow within the housing; as well as A heat exchange unit, disposed within the housing, facilitates air heat exchange that circulates within the housing. The heat exchange unit is the heat exchange unit according to any one of claims 1-11.

13. The ventilation device according to claim 12, characterized in that, The heat exchange unit is provided with protruding plates; and The housing is provided with a fixing groove that engages with the protruding piece. The heat exchange unit is fixed to the housing by engaging the protruding piece with the fixing groove.

14. The ventilation device according to claim 13, characterized in that, The outdoor air inlet and the indoor air outlet are paired to correspond to one of at least one group of ventilation outlets; and The indoor air inlet and the outdoor air outlet are paired to correspond to another group of at least one set of vents.

Images