heat exchange device

Abstract

This utility model provides a heat exchange device, comprising: a housing with air vents; the air vents include: an air inlet for allowing air from a first space to enter the housing; an air outlet for allowing air entering the housing to be blown out to a second space; and an air supply fan for blowing air from the air inlet to the air outlet, forming an air supply path; the air supply path includes: a first air supply branch path and a second air supply branch path; in the first air supply branch path, air enters the air supply fan from the first air supply inlet; in the second air supply branch path, air enters the air supply fan from the second air supply inlet opposite to the first air supply inlet.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically to a heat exchange device. Background Technology

[0002] In existing heat exchange devices, when the exhaust fan and the supply fan are started, air enters simultaneously from the air inlet and the return air inlet. After heat exchange at the heat exchange unit, air enters the exhaust fan and the supply fan respectively from the exhaust air inlet located above the exhaust fan and the supply air inlet located above the supply fan.

[0003] However, in the process of implementing this application, it was discovered that when the space between the heat exchange unit and the exhaust fan or air supply fan is narrow, the insufficient space leads to increased pressure loss, thereby reducing the air volume of the heat exchange device. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a heat exchange device that reduces pressure loss and increases airflow.

[0005] The heat exchange device provided by this utility model includes: a housing with air vents; the air vents include: an air inlet for allowing air from a first space to enter the housing; an air outlet for allowing air entering the housing to be blown out to a second space; and an air supply fan for blowing air from the air inlet to the air outlet, forming an air supply path; the air supply path includes: a first air supply branch path and a second air supply branch path; in the first air supply branch path, air enters the air supply fan from the first air supply inlet; in the second air supply branch path, air enters the air supply fan from the second air supply inlet opposite to the first air supply inlet.

[0006] Optionally, the heat exchange device further includes: a return air vent, allowing air from the second space to enter the housing; an exhaust air vent, allowing air entering the housing to be blown out toward the first space; and an exhaust fan, causing air to be blown from the return air vent to the exhaust air vent, forming an exhaust air path; the exhaust air path includes: a first exhaust air branch path and a second exhaust air branch path; in the first exhaust air branch path, air enters the exhaust fan from the first exhaust air inlet of the exhaust fan; in the second exhaust air branch path, air enters the exhaust fan from the second exhaust air inlet of the exhaust fan, which is opposite to the first exhaust air inlet.

[0007] Optionally, the heat exchange device further includes: a receiving portion disposed within the housing and configured to accommodate the air supply fan and / or the exhaust fan; and a heat exchange unit disposed within the receiving portion, wherein the air inlet and the air supply fan are located on both sides of the heat exchange unit, and / or the return air inlet and the exhaust fan are located on both sides of the heat exchange unit.

[0008] Optionally, the receiving part is provided with a first ventilation hole penetrating the receiving part near the air supply fan; the air entering from the air inlet passes through the heat exchange unit, then through the first ventilation hole, and enters the air supply fan from the second air supply inlet.

[0009] Optionally, the receiving part is provided with a second ventilation hole penetrating the receiving part near the exhaust fan; the air entering from the return air inlet passes through the heat exchange unit, then through the second ventilation hole, and enters the exhaust fan from the second exhaust air inlet.

[0010] Optionally, the receiving portion is provided with a first recess, which connects the first ventilation hole and the second air inlet.

[0011] Optionally, the receiving portion is provided with a second recess, which connects the second ventilation hole and the second exhaust air inlet.

[0012] Optionally, the receiving portion further forms a bypass ventilation duct, which connects the return air vent and the exhaust air vent.

[0013] Optionally, the heat exchange device further includes: an air path switching plate, rotatably disposed within the receiving section and near the return air vent, to allow air from the return air vent to flow to the exhaust air vent via a bypass duct or to the exhaust air vent via the heat exchange unit.

[0014] Optionally, the bypass ventilation duct is provided with a third ventilation hole penetrating the receiving part.

[0015] Optionally, the exhaust air path further includes: an exhaust main air path, formed upstream of the heat exchange unit in the exhaust air path; the height of the first air inlet is higher than the height of the exhaust main air path, and the height of the second air inlet is lower than the height of the exhaust main air path.

[0016] Optionally, the air supply path includes: a main air supply path, formed upstream of the heat exchange unit in the air supply path; the height of the first exhaust air inlet is higher than the height of the main air supply path, and the height of the second exhaust air inlet is lower than the height of the main air supply path.

[0017] Optionally, the air supply fan includes air supply fan blades, the first air supply inlet and the second air supply inlet are disposed on opposite axial sides of the air supply fan blades, and the circumferential side of the air supply fan blades is connected to the air outlet.

[0018] Optionally, the exhaust fan includes exhaust fan blades, the first exhaust inlet and the second exhaust inlet are disposed on opposite axial sides of the exhaust fan blades, and the circumferential side of the exhaust fan blades is connected to the exhaust outlet.

[0019] Optionally, an arc-shaped guide wall protruding toward the second ventilation hole is formed on the upstream side of the second ventilation hole.

[0020] Optionally, an air passage wall protruding toward the second ventilation hole is formed inside the receiving part near the second ventilation hole.

[0021] As can be seen from the above technical solution, the heat exchange device of this utility model has at least the following beneficial effects: by adding a second air distribution path, air can enter the air supply fan from multiple directions, thereby reducing pressure loss, reducing the overall power, and increasing the air volume entering the air supply fan. Attached Figure Description

[0022] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0023] Figure 1 A side view of the heat exchange device according to an embodiment of the present invention in heat exchange mode is shown.

[0024] Figure 2 A side view of the heat exchange device according to an embodiment of the present invention in ventilation mode is shown.

[0025] Figure 3 It shows in Figure 1 Sectional view at point AA.

[0026] Figure 4 It shows in Figure 1 Sectional view at point BB.

[0027] Figure 5 It shows in Figure 1 Sectional view at point CC.

[0028] Figure 6 It shows in Figure 1 Sectional view at point DD.

[0029] Figure 7 A diagram showing the positional relationship between the airflow switching plate and the upper and lower parts according to an embodiment of the present invention is provided.

[0030] Figure 8 A side view of a heat exchange device according to an embodiment of the present invention is shown from another angle.

[0031] Figure 9 A perspective view of the lower part of the receiving portion according to an embodiment of the present invention is shown.

[0032] Figure Labels

[0033] 1. Air inlet; 2. Air outlet; 3. Air supply fan; 31. First air supply inlet; 32. Second air supply inlet; 33. Air supply motor; 34. Air supply fan blades; 35. Air supply motor bracket; 4. Air supply air path; 41. First air supply branch path; 42. Second air supply branch path; 43. Main air supply air path; 5. Return air outlet; 6. Exhaust air outlet; 7. Exhaust fan; 71. First exhaust air inlet; 72. Second exhaust air inlet; 73. Exhaust motor; 74. Exhaust fan blades; 75. Exhaust motor bracket; 8. Exhaust air path; 81. First exhaust branch path; 82. Second exhaust branch path 83. Main exhaust air duct; 9. Receiving part; 91. First ventilation hole; 92. Second ventilation hole; 93. First recessed part; 94. Second recessed part; 95. Side ventilation duct; 96. Side ventilation channel; 97. Upper part; 971. External top surface; 98. Lower part; 981. External bottom surface; 10. Heat exchange unit; 101. First heat exchange unit; 102. Second heat exchange unit; 103. First air inlet surface; 104. First air outlet surface; 105. Second air inlet surface; 106. Second air outlet surface; 11. Air duct switching plate; 12. Third ventilation hole; 13. Guide wall; 14. Air duct wall. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The orientations or positional relationships described below are for the convenience of describing this utility model and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Specifically, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] This invention provides a heat exchange device. The heat exchange device of this invention will be described in detail below with reference to the figures.

[0038] Figure 1 A side view of the heat exchange device according to an embodiment of the present invention in heat exchange mode is shown. Figure 2 A side view of the heat exchange device according to an embodiment of the present invention in ventilation mode is shown. Figure 3 It shows in Figure 1 Sectional view at point AA. Figure 4 It shows in Figure 1 Sectional view at point BB. Figure 5 It shows in Figure 1 Sectional view at point CC. Figure 6 It shows in Figure 1 Sectional view at point DD.

[0039] The heat exchange device in this embodiment can be a device that draws air from the first space and discharges it to the second space, while simultaneously drawing air from the second space and discharging it back into the first space. Examples include a fresh air heat exchange device installed in the second space, or a dehumidifying total heat exchange device.

[0040] The first space and the second space are two different spaces. In this embodiment, the first space is outdoors, and the second space is indoors. The heat exchange device is located indoors. In other embodiments, the first space and the second space can also be two independent spaces, such as two separate rooms.

[0041] like Figures 1-6 As shown, the heat exchange device provided by this utility model includes a housing (not shown in the figure), a heat exchange unit 10, a housing 9, an air supply fan 3, an exhaust fan 7, and a bypass ventilation duct 96.

[0042] The shell, forming the outline of the heat exchange device, is a hollow rectangular box. The shell includes a top wall, a bottom wall, and four side walls. The four side walls are: a first side wall on the right side, a second side wall on the left side opposite the first side wall, a front wall adjacent to the first and second side walls at the front of the shell, and a rear wall at the rear of the shell. The front and rear walls face each other. The shell has an air inlet 1, an air supply inlet 2, a return air inlet 5, and an exhaust air inlet 6. An air supply fan 3 blows air from the air inlet 1 to the air supply inlet 2, forming an air supply path 4. An exhaust fan 7 blows air from the return air inlet 5 to the exhaust air inlet 6, forming an exhaust air path 8. In heat exchange mode, the air supply path 4 and the exhaust air path 8 intersect, with the air supply path 4 ending at the air inlet 1 and the air supply inlet 2, respectively. The exhaust air path 8 ends at the air return inlet 5 and the exhaust air inlet 6, respectively. The heat exchange unit 10 is located at the intersection of the air supply path 4 and the exhaust path 8.

[0043] Air inlet 1 is an opening that connects the interior of the housing to the exterior via a duct, allowing outdoor air to enter the housing. Air inlet 1 is located on the second side wall of the housing, on the left side. Air inlet 1 is open when the heat exchange device is in heat exchange mode or ventilation mode.

[0044] Air outlet 2 is an opening that connects the interior of the housing to the room via a duct, allowing air from inside the housing to be blown into the room. Air outlet 2 is located on the first side wall of the housing, on the right side of the housing. Air outlet 2 is normally open, meaning that air outlet 2 is open when the heat exchange device is in heat exchange mode or ventilation mode.

[0045] The return air vent 5 is an opening that connects the interior of the housing to the room via a duct, allowing indoor air to be drawn into the housing. The return air vent 5 is located on the first side wall of the housing, on the right side. The return air vent 5 is normally open, meaning it is open when the heat exchange device is in heat exchange or ventilation mode. In this embodiment, a duct switching plate 11 is provided downstream of the return air vent 5. This duct switching plate 11 is used to switch the entry of indoor air into the housing via the exhaust duct 8 or the bypass duct 95 described below. That is, when the duct switching plate 11 closes the exhaust duct 8 and opens the bypass duct 96, indoor air enters the housing through the bypass duct 96. When the duct switching plate 11 closes the bypass duct 96 and opens the exhaust duct 8, indoor air enters the housing through the exhaust duct 8.

[0046] Exhaust vent 6 is an opening that connects the interior of the housing to the exterior via a duct, allowing air from inside the housing to be blown outdoors. Exhaust vent 6 is located on the second side wall of the housing, on the left side. Exhaust vent 6 is open when the heat exchange device is in heat exchange mode or ventilation mode.

[0047] Figure 7 A diagram showing the positional relationship between the airflow switching plate and the upper and lower parts according to an embodiment of the present invention is provided.

[0048] A receiving portion 9, located within the aforementioned housing, is used to accommodate the air supply fan 3, the exhaust fan 7, and / or the heat exchange unit 10. Inside the receiving portion 9, the top of the heat exchange unit 10 is in contact with the inner top surface of the receiving portion 9. The bottom of the heat exchange unit 10 is in contact with the inner bottom surface of the receiving portion 9. That is, air cannot flow between the top of the heat exchange unit 10 and the receiving portion 9, nor can it flow between the bottom of the heat exchange unit 10 and the receiving portion 9. Outside the receiving portion 9, the outer top surface 971 of the receiving portion 9 is in contact with the top wall of the housing, and the outer bottom surface 981 of the receiving portion 9 is in contact with the bottom wall of the housing. The outer bottom surface 981 of the receiving portion 9 represents the surface of the receiving portion 9 facing the bottom wall of the housing. The outer top surface 971 of the receiving portion 9 represents the surface of the receiving portion 9 facing the top wall of the housing. The receiving portion 9 is composed of an upper part 97 and a lower part 98, and a space is formed between the upper part 97 and the lower part 98 that allows air to pass through. Furthermore, air passage spaces are also formed between the upper part 97 and the shell, and between the lower part 98 and the shell. The material of the housing 9 can be insulation material or polyurethane composite material. Figure 7 As shown, the airflow switching plate 11 is rotatably connected between the upper part 97 and the lower part 98 to control the air from the return air vent 5 to flow to the exhaust air vent 6 via the bypass ventilation duct 96 or via the heat exchange unit 10.

[0049] The receiving part 9 includes a first ventilation hole 91, a second ventilation hole 92, and a third ventilation hole 12. The first ventilation hole 91, the second ventilation hole 92, and the third ventilation hole 12 all penetrate the receiving part 9, that is, they penetrate the upper part 97 and the lower part 98 of the receiving part 9.

[0050] The first ventilation opening 91 is located in the air supply path 4, near the air supply fan 3. Air from the outside can enter the first ventilation opening 91 after passing through the heat exchange unit 10.

[0051] The second ventilation hole 92 is located in the exhaust air passage 8, near the exhaust fan 7. Air from the room can enter the second ventilation hole 92 after passing through the heat exchange unit 10. In this embodiment, an arc-shaped guide wall 13 protruding into the second ventilation hole 92 is formed on the upstream side of the second ventilation hole 92. An air passage wall 14 protruding into the second ventilation hole 92 is formed inside the receiving part 9 near the second ventilation hole 92, that is, the air passage wall 14 of the main air supply passage 43 is an outwardly protruding arc shape, which makes the main air supply passage 43 smoother. In other embodiments, an arc-shaped guide wall 13 protruding into the first ventilation hole 91 may also be provided on the upstream side of the first ventilation hole 91.

[0052] The third ventilation opening 12 is located in the bypass ventilation duct 96 described below.

[0053] Figure 8 A side view of a heat exchange device according to an embodiment of the present invention is shown from another angle.

[0054] like Figure 8 As shown, the receiving portion 9 also includes a first recessed portion 93 and a second recessed portion 94.

[0055] A first recess 93 is formed in the lower part 98 of the receiving part 9. The first recess 93 connects the first ventilation hole 91 and the second air inlet 32. The first recess 93 is recessed from the outer bottom surface 981 of the receiving part 9 inwards, forming a space connecting the first ventilation hole 91 and the second air inlet 32. That is, air entering from the first ventilation hole 91 can enter the air supply fan 3 through the second air inlet 32.

[0056] A second recess 94 is formed in the lower part 98 of the receiving part 9. The second recess 94 connects to the second ventilation hole 92 and the second exhaust air inlet 72. The second recess 94 is recessed from the outer bottom surface 981 of the receiving part 9 inward, forming a space connecting the second ventilation hole 92 and the second exhaust air inlet 72, that is, air entering through the second ventilation hole 92 can enter the exhaust fan 7 through the second exhaust air inlet 72. In this embodiment, the second recess 94 also extends to the third ventilation hole 12, forming a space connecting the third ventilation hole 12 and the second exhaust air inlet 72. That is, air entering through the third ventilation hole 12 can enter the exhaust fan 7 through the second recess 94 from the second exhaust air inlet 72.

[0057] The heat exchange unit 10 is housed within the housing portion 9, located in the middle of the heat exchange device. The heat exchange unit 10 is a layered structure composed of multiple thin plates bonded together. Air flows between the layers for heat exchange but does not mix. The heat exchange unit 10 includes an air inlet surface (i.e., the first air inlet surface 103 and the second air inlet surface 105 described below) and an air outlet surface (i.e., the first air outlet surface 104 and the second air outlet surface 106 described below). In this embodiment, the air inlet surface is located in the lower portion 98 of the housing portion 9. The air outlet surface is located in the upper portion 97 of the housing portion 9. For example, the heat exchange unit 10 can be a full heat exchange core.

[0058] The heat exchange unit 10 may include: a first heat exchange unit 101 disposed in the receiving portion 9 and a horizontally disposed rear side of the first heat exchange unit 101. Figure 2The second heat exchange unit 102 is shown above the first heat exchange unit 101. According to other embodiments, the heat exchange unit 10 can consist of one heat exchange unit 10 or two or more heat exchange units 10. The heat exchange unit 10 can be in the shape of a square, hexagon, etc. In this embodiment, the heat exchange unit 10 is a horizontally mounted hexagon. The heat exchange unit 10 has opposing first air inlet surfaces 103 and first air outlet surfaces 104, and opposing second air inlet surfaces 105 and second air outlet surfaces 106. Air filters can be provided upstream of each of the four air inlet and outlet surfaces of the heat exchange unit 10 (i.e., the first air inlet surface 103, the first air outlet surface 104, the second air inlet surface 105, and the second air outlet surface 106) to purify the air passing through the air supply path 4 and / or the exhaust path 8. Further, outdoor air can enter the heat exchange unit 10 through the first air inlet surface 103 and exit the heat exchange unit 10 through the first air outlet surface 104. Air from the room can enter the heat exchange unit 10 through the second air inlet 105 and exit the heat exchange unit 10 through the second air outlet 106. The exhaust fan 7 and the supply fan 3 are arranged opposite each other on both sides of the heat exchange unit 10 (e.g., Figure 2 (As shown in the left-right direction). Specifically, the exhaust fan 7 is arranged opposite to the first heat exchange unit 101. The exhaust fan 7 is housed within the housing 9. The exhaust fan 7 includes an exhaust motor 73 and an exhaust fan blade 74. The exhaust fan blade 74 is rotated by the rotation of the exhaust motor 73 to generate an airflow. A first exhaust inlet 71 and a second exhaust inlet 72 are provided on opposite axial sides of the exhaust fan blade 74. The circumferential side of the exhaust fan blade 74 is connected to the exhaust vent 6. In this embodiment, the exhaust fan blade 74 is a double-layered blade. An exhaust motor bracket 75 and an exhaust motor 73 are provided on one side of the exhaust fan blade 74, and air can enter the exhaust fan 7 from the second exhaust inlet 72. On the side opposite to the exhaust motor 73 side, the housing 9 is provided with a first exhaust inlet 71 opposite to the exhaust fan blade 74, and air can enter the exhaust fan 7 from the first exhaust inlet 71.

[0059] An air supply fan 3 is housed within a housing 9 and is positioned opposite to the first heat exchange unit 101. The air supply fan 3 includes an air supply motor 33 and air supply fan blades 34. Airflow is generated by rotating the air supply fan blades 34, driven by the rotation of the air supply motor 33. A first air supply inlet 31 and a second air supply inlet 32 ​​are located on opposite axial sides of the air supply fan blades 34. The circumferential side of the air supply fan blades 34 communicates with the air outlet 2. In this embodiment, the air supply fan blades 34 are double-layered blades. An air supply motor bracket 35 and an air supply motor 33 are provided on one side of the air supply fan blades 34, allowing air to enter the air supply fan 3 through the second air supply inlet 32. The second air supply inlet 32 ​​is exposed in the space formed between the lower part 98 of the housing 9 and the bottom wall of the housing. On the side opposite to the air supply motor 33, a first air supply inlet 31 is provided in the housing 9 opposite to the air supply fan blade 34, allowing air to enter the air supply fan 3. The first air supply inlet 31 is exposed in the space formed between the upper part 97 of the housing 9 and the top wall of the housing. In this embodiment, the air supply fan 3 is located near the air supply outlet 2, upstream of the right air supply outlet. The exhaust fan is located near the exhaust outlet 6, upstream of the left exhaust outlet 6. The air supply fan 3 and the exhaust fan 7 are preferably variable frequency fans with adjustable speed.

[0060] The air supply path 4 includes: the main air supply path 43, the first air supply branch path 41, and the second air supply branch path 42.

[0061] Figure 9 A perspective view of the lower part of the receiving portion according to an embodiment of the present invention is shown.

[0062] The main air supply path 43 is located upstream of the heat exchange device in the air supply path 4. Specifically, it is formed between the air inlet 1 and the first air inlet surface 103 of the heat exchange device. For example, Figure 9 As shown, near the air inlet 1, the lower part 98 of the receiving part 9 is recessed away from the upper part 97 to increase the space between the upper part 97 and the lower part 98. Furthermore, near the air inlet 1, the recess of the lower part 98 can gradually increase from small to large from the air inlet 1 towards the heat exchange unit 10, forming a funnel shape, thereby allowing the air in the main air supply path 43 to gradually diffuse.

[0063] The first air supply branch path 41 is located downstream of the main air supply path 43, that is, it is formed between the first air inlet surface 103 and the first air supply inlet 31 of the air supply fan 3. Specifically, after the air in the first air supply branch path 41 enters the heat exchange unit 10, it is blown out from the first air outlet surface 104 of the heat exchange unit 10, and then passes through the space formed between the upper part 97 of the receiving part 9 and the top wall of the housing, and reaches the first air supply inlet 31.

[0064] The second air supply branch path 42 is located downstream of the main air supply path 43, specifically between the first air inlet surface 103 and the second air supply inlet 32 ​​of the air supply fan 3. Specifically, after the air in the second air supply branch path 42 enters the heat exchange unit 10, it is blown out from the first air outlet surface 104 of the heat exchange unit 10. After passing through the space formed between the upper part 97 of the receiving part 9 and the top wall of the housing, it enters the first recess 93 through the first ventilation hole 91, and then enters the air supply fan 3 through the second air supply inlet 32.

[0065] The exhaust air path 8 includes: the main exhaust air path 83, the first exhaust air path 81, and the second exhaust air path 82.

[0066] The main exhaust air path 83, within the exhaust air path 8, is located upstream of the heat exchanger, specifically between the return air inlet 5 and the second air inlet surface 105 of the heat exchanger. Specifically, as shown... Figure 9 As shown, near the return air vent 5, the lower part 98 of the receiving part 9 is recessed away from the upper part 97 on its surface to increase the space between the upper part 97 and the lower part 98. Furthermore, near the return air vent 5, the recess of the lower part 98 can gradually increase from small to large in the direction from the return air vent 5 toward the heat exchange unit 10, thereby allowing the air in the main exhaust air passage 83 to gradually diffuse.

[0067] The first exhaust air distribution path 81 is located downstream of the main exhaust air path 83, that is, it is formed between the second air inlet surface 105 and the first exhaust air inlet 71 of the exhaust fan 7. Specifically, after the air in the first exhaust air distribution path 81 enters the heat exchange unit 10, it is blown out from the second air outlet surface 106 of the heat exchange unit 10, and then passes through the space formed between the upper part 97 of the receiving part 9 and the top wall of the housing, and reaches the first exhaust air inlet 71.

[0068] The second exhaust air distribution path 82 is located downstream of the main exhaust air path 83, specifically between the second air inlet surface 105 and the second exhaust air inlet 72 of the exhaust fan 7. Specifically, after the air in the second exhaust air distribution path 82 enters the heat exchange unit 10, it is blown out from the second air outlet surface 106 of the heat exchange unit 10. After passing through the space formed between the upper part 97 of the receiving part 9 and the top wall of the housing, it enters the second recess 94 through the second ventilation hole 92, and then enters the exhaust fan 7 through the second exhaust air inlet 72.

[0069] The main air supply path 43, the first exhaust branch path 81, and the second exhaust branch path 82 are located near the second side wall of the casing. The main exhaust path 83, the first exhaust branch path 41, and the second exhaust branch path 42 are located near the first side wall of the casing. The height of the first air supply inlet 31 is higher than the height of the main exhaust path 83, and the height of the second air supply inlet 32 ​​is lower than the height of the main exhaust path 83. The height of the first exhaust inlet 71 is higher than the height of the main air supply path 43, and the height of the second exhaust inlet 72 is lower than the height of the main air supply path 43.

[0070] The receiving section 9 also forms a bypass ventilation duct 96. The bypass ventilation duct 96 connects the return air vent 5 and the exhaust air vent 6 to form a bypass ventilation path 95 that flows from the return air vent 5 to the exhaust air vent 6 without passing through the heat exchange unit 10. A duct switching plate 11 is provided on the downstream side of the return air vent 5 to switch the duct. By rotating the duct switching plate 11, air can be prevented from entering the bypass ventilation duct 96 or the heat exchange unit 10 from the return air vent 5, thereby allowing air from the return air vent 5 to flow to the exhaust air vent 6 via the bypass ventilation duct 96 or to the exhaust air vent 6 via the heat exchange unit 10. The second recess 94 can be formed as part of the bypass ventilation duct 96, that is, the bypass ventilation duct 96 can include the second recess 94. The bypass ventilation duct 96 is provided with a third ventilation hole 12. At least a portion of the third ventilation hole 12 can be located on the side of the heat exchange unit 10 near the second ventilation hole 92, allowing air flowing out from the second air outlet surface 106 of the heat exchange unit 10 to enter the third ventilation hole 12. A portion of the air entering the bypass ventilation duct 96 can pass through the third ventilation hole 12, the second recess 94, and the second exhaust air inlet 72 in sequence, thereby entering the exhaust fan 7; another portion can pass through the third ventilation hole 12, the second ventilation hole 92, and the first exhaust air inlet 71 in sequence, thereby entering the exhaust fan 7; and yet another portion can pass through the third ventilation hole 12, the second ventilation hole 92, the second recess 94, and the second exhaust air inlet 72 in sequence, thereby entering the exhaust fan 7.

[0071] Furthermore, the housing 9 can be formed as a one-piece molded foam component, thereby improving the insulation of the heat exchange device and reducing energy loss. When the housing 9 is formed as a foam component, ventilation holes (i.e., the first ventilation hole 91, the second ventilation hole 92, and the third ventilation hole 12) can be easily formed on the housing 9. By forming ventilation holes, the path for air to enter the fans (i.e., the supply fan 3 and the exhaust fan 7) can be increased, thereby increasing the airflow of the heat exchange device and improving the efficiency and total volume of air circulation. Furthermore, the ventilation holes can be formed in dead zones where air cannot enter or where air stagnates, reducing the number of dead zones and thus optimizing the overall structure of the heat exchange device.

[0072] The above describes the structure of the heat exchange device. The following describes the operation of the heat exchange device.

[0073] When the heat exchange device is in heat exchange mode, the air outlet, air inlet 1, return air outlet 5, and exhaust air outlet 6 are open. The air path switching plate 11 at exhaust air outlet 6 closes the bypass ventilation duct 96, and air enters the exhaust air path 8. At this time, the supply air fan 3 and the exhaust air fan 7 start simultaneously. The indoor air entering the housing from the return air outlet 5 enters the main exhaust air path 83, and reaches the heat exchange unit 10 along the main exhaust air path 83. There, it exchanges energy with the air entering the supply air path 43 from the air inlet 1 within the heat exchange unit 10, thus achieving heat exchange. After exchanging heat with the indoor air, the outdoor air blown out from the first heat exchange unit 101 enters the air supply fan 3 along the first air supply branch path 41. The air blown out from the second heat exchange unit 102, i.e., the side blown away from the air supply fan 3, partly enters the air supply fan 3 along the first air supply branch path 41, and partly enters the second air supply branch path 42, entering the first recess 93 through the first ventilation hole 91, and then entering the air supply fan 3 through the second air supply inlet 32. Since the height of the first air supply inlet 31 is higher than the height of the main exhaust air path 83, and the height of the second air supply inlet 32 ​​is lower than the height of the main exhaust air path 83, the air blown out from the heat exchange unit 10 utilizes the space where the main exhaust air path 83 is located. The first and second air supply branch paths 41 and 42 are set in the upper and lower spaces of the main exhaust air path 83, optimizing space utilization and maximizing the use of the airflow. Finally, the air entering from the first air inlet 31 and the air entering from the second air inlet 32 ​​are discharged together from the air outlet 2. The addition of the second air distribution path 42 allows air to enter the air supply fan 3 from multiple directions, thereby reducing pressure loss and lowering the overall power consumption.

[0074] On the other hand, the indoor air, after heat exchange with the outdoor air, enters the exhaust fan 7 along the first exhaust distribution path 81 from the first heat exchange unit 101. Meanwhile, the air blown from the second heat exchange unit 102, i.e., the side away from the exhaust fan 7, partly enters the exhaust fan 7 along the first exhaust distribution path 81, and partly enters the second exhaust distribution path 82, entering the second recess 94 through the second ventilation hole 92. At this point, the air passes through the guide wall 13 of the second ventilation hole 92, and then smoothly enters the second ventilation hole 92 along the protruding direction of the guide wall 13. Then, it enters the exhaust fan 7 through the second exhaust inlet 72. Finally, the air entering from the first exhaust inlet 71 and the air entering from the second exhaust inlet 72 are discharged together from the exhaust vent 6. The addition of the second exhaust distribution path 82 allows air to enter the exhaust fan 7 from multiple directions, thereby reducing pressure loss and lowering the overall power consumption. The height of the first exhaust air inlet 71 is higher than the height of the main air supply path 43, and the height of the second exhaust air inlet 72 is lower than the height of the main air supply path 43. The air blown out from the heat exchange unit 10 utilizes the space where the main air supply path 43 is located. The upper and lower spaces of the main air supply path 43 are provided with the first exhaust branch path 81 and the second exhaust branch path 82, which not only optimizes space utilization but also maximizes the use of the air path. Due to the provision of the third ventilation hole 12, the air flowing out from the second air outlet 106 of the heat exchange unit 10 can enter the third ventilation hole 12 and then enter the exhaust fan 7 through the third ventilation hole 12, thereby further reducing pressure loss and lowering the overall power consumption.

[0075] When the heat exchanger is in ventilation mode, the air inlet 1, air outlet 5, return air inlet 5, and exhaust air outlet 6 are open. The air path switching plate 11 downstream of the return air inlet 5 closes the exhaust air path 8, and the bypass ventilation duct 96 is opened. The supply air fan 3 and the exhaust air fan 7 are started. Outdoor air entering the housing through the air inlet 1 enters the main supply air path 43. Guided by the air path wall 14 at the main supply air path 43, the air in the main supply air path 43 can smoothly enter the heat exchange unit 10, reducing turbulence. After passing through the heat exchange unit 10, the air enters the supply air fan 3 along the first supply air branch path 41 and the second supply air branch path 42, and is then discharged from the air outlet 2.

[0076] Indoor air entering from the return air vent 5 passes through the bypass ventilation duct 96. A portion of this air sequentially passes through the third ventilation hole 12, the second recess 94, and the second exhaust air inlet 72 before entering the exhaust fan 7. Another portion passes through the third ventilation hole 12, the second ventilation hole 92, and the first exhaust air inlet 71 before entering the exhaust fan 7. A third portion passes through the third ventilation hole 12, the second ventilation hole 92, the second recess 94, and the second exhaust air inlet 72 before entering the exhaust fan 7. After entering the exhaust fan 7, the air is exhausted from the exhaust vent 6, thus achieving rapid ventilation.

[0077] The embodiments of this utility model have now been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of this utility model.

[0078] It should be noted that implementations not shown or described in the accompanying drawings or the main text of the specification are all forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the components described above are not limited to the specific structures and shapes mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0079] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A heat exchange device, comprising: A housing with an air vent; The air vent includes: An air inlet allows air from the first space to enter the housing; The air outlet allows air entering the housing to be blown out into the second space; An air supply fan blows air from the air inlet to the air outlet, forming an air supply path. The air supply path is characterized in that it includes: a first air supply branch path and a second air supply branch path; In the first air supply branch path, air enters the air supply fan from the first air supply inlet of the air supply fan; In the second air supply path, air enters the air supply fan from the second air supply inlet, which is opposite to the first air supply inlet.

2. The heat exchange device of claim 1, wherein Also includes: A return air vent allows air from the second space to enter the housing; An exhaust vent allows air entering the housing to be blown out into the first space; An exhaust fan blows air from the return air inlet to the exhaust air outlet, forming an exhaust air path. The exhaust air path includes: a first exhaust air distribution path and a second exhaust air distribution path; In the first exhaust air distribution path, air enters the exhaust fan from the first exhaust air inlet of the exhaust fan; In the second exhaust air distribution path, air enters the exhaust fan from the second exhaust air inlet, which is opposite to the first exhaust air inlet.

3. The heat exchange device of claim 2, wherein Also includes: A receiving portion, disposed within the housing, is configured to receive the air supply fan and / or the exhaust fan; A heat exchange unit is disposed in the receiving part, wherein the air inlet and the air supply fan are located on both sides of the heat exchange unit, and / or the return air inlet and the exhaust fan are located on both sides of the heat exchange unit.

4. The heat exchange device of claim 3, wherein The receiving part is provided with a first ventilation hole penetrating the receiving part near the air supply fan; The air entering from the air inlet passes through the heat exchange unit, then through the first ventilation hole, and finally enters the air supply fan from the second air supply inlet.

5. The heat exchange device of claim 3, wherein The housing is provided with a second ventilation hole penetrating the housing near the exhaust fan; The air entering from the return air inlet passes through the heat exchange unit, then through the second ventilation hole, and finally enters the exhaust fan from the second exhaust air inlet.

6. The heat exchange device of claim 4, wherein The receiving portion is provided with a first recess, which connects the first ventilation hole and the second air inlet.

7. The heat exchange device of claim 5, wherein The receiving portion is provided with a second recess, which connects the second ventilation hole and the second exhaust air inlet.

8. The heat exchange device of claim 7, wherein The receiving section also forms a bypass ventilation duct, which connects the return air vent and the exhaust air vent.

9. The heat exchange device of claim 8, wherein, Also includes: The airflow switching plate is rotatably disposed within the receiving section and near the return air vent, so as to allow air from the return air vent to flow to the exhaust air vent via the bypass duct or to the exhaust air vent via the heat exchange unit.

10. The heat exchange device of claim 9, wherein The bypass ventilation duct is provided with a third ventilation hole that penetrates the housing.

11. The heat exchange device of claim 3, wherein The exhaust duct also includes: The main exhaust air path is formed upstream of the heat exchange unit in the exhaust air path; The height of the first air inlet is higher than the height of the main exhaust air path, and the height of the second air inlet is lower than the height of the main exhaust air path.

12. The heat exchange device of claim 3, wherein The air supply path includes: The main air supply path is formed upstream of the heat exchange unit in the air supply path; The height of the first exhaust air inlet is higher than the height of the main air supply path, and the height of the second exhaust air inlet is lower than the height of the main air supply path.

13. The heat exchange device of claim 1, wherein The air supply fan includes air supply fan blades, and the first air supply inlet and the second air supply inlet are disposed on opposite axial sides of the air supply fan blades. The circumferential side of the air supply fan blades is connected to the air outlet.

14. The heat exchange device of claim 2, wherein The exhaust fan includes exhaust fan blades, the first exhaust inlet and the second exhaust inlet are disposed on opposite axial sides of the exhaust fan blades, and the circumferential side of the exhaust fan blades is connected to the exhaust outlet.

15. The heat exchange device of claim 5, wherein, An arc-shaped guide wall protruding toward the second ventilation hole is formed on the upstream side of the second ventilation hole.

16. The heat exchange device of claim 15, wherein, An air passage wall protruding toward the second ventilation hole is formed inside the receiving part near the second ventilation hole.

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