Fresh air unit

Abstract

This invention discloses a fresh air unit, belonging to the field of air conditioning equipment technology. The fresh air unit includes a shell, a heat exchange core, an insulation body, a fresh air fan, and an exhaust fan. The insulation body is an integrated structure housed within the shell. The exhaust path and fresh air path are defined by the cooperation between the insulation body and the heat exchange core. In fresh air mode, outdoor air can enter the room sequentially through the air inlet, the fresh air path, and the fresh air outlet. Indoor air can be exhausted to the outside sequentially through the return air inlet, the exhaust path, and the exhaust outlet. Outdoor air and indoor air exchange heat in the heat exchange core, achieving energy recovery while exchanging fresh air. The insulation body provides insulation and support. There is no need to assemble or add insulation foam or other components, reducing the number of parts, saving material and mold costs, greatly simplifying the assembly structure, making installation easier, and effectively improving assembly efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and in particular to a fresh air fan. Background Technology

[0002] In related technologies, the fresh air unit uses a structure assembled from multiple foam pieces, and sponges are needed between the foam pieces for insulation. This results in a large number of parts and low assembly efficiency. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a new type of air ventilator that uses an integrated insulation body for insulation and support, reducing the number of parts and effectively improving assembly efficiency.

[0004] According to a first aspect of the present invention, a fresh air fan includes a housing, a heat exchange core, an insulation body, an internal circulation valve, a fresh air fan, and an exhaust fan. The housing is provided with an air inlet, a fresh air inlet, a return air inlet, and an exhaust air inlet. The heat exchange core is installed inside the housing. The insulation body is an integral structure and is disposed inside the housing. The insulation body is provided with openings corresponding to the air inlet, the fresh air inlet, the return air inlet, and the exhaust air inlet. The insulation body and the heat exchange core cooperate to define an exhaust path connecting the return air inlet and the exhaust air inlet, and a fresh air path connecting the air inlet and the fresh air inlet. The fresh air fan is disposed within the fresh air path and connected to the fresh air inlet. The exhaust fan is disposed within the exhaust path and connected to the exhaust air inlet.

[0005] The fresh air system according to embodiments of the present invention has at least the following beneficial effects:

[0006] The insulation unit adopts an integrated structure and is installed inside the shell. The heat exchange core, fresh air fan, and exhaust fan are located inside the insulation unit. The exhaust and fresh air paths are defined by the cooperation between the insulation unit and the heat exchange core. In fresh air mode, outdoor air can enter the room sequentially through the air inlet, fresh air path, and fresh air outlet. Indoor air can be exhausted to the outside sequentially through the return air outlet, exhaust air path, and exhaust outlet. Outdoor and indoor air exchange heat in the heat exchange core. Energy can be recovered while fresh air is being exchanged. The insulation unit provides insulation and support. There is no need to assemble or add insulation foam or other components, which reduces the number of parts, helps to save material and mold costs, greatly simplifies the assembly structure, makes installation easier, and effectively improves assembly efficiency.

[0007] According to some embodiments of the present invention, the heat insulation body includes a base plate and a frame connecting the periphery of the base plate. The inner wall of the frame is provided with a plurality of support portions arranged circumferentially along the frame, and the plurality of support portions are all connected to the heat exchange core.

[0008] According to some embodiments of the present invention, the frame is provided with a first support portion, a second support portion and a third support portion, the first support portion is fixedly provided with a first sheet metal part, the second support portion is fixedly provided with a second sheet metal part, and the third support portion is fixedly provided with a third sheet metal part, the first sheet metal part, the second sheet metal part and the third sheet metal part are respectively connected to the heat exchange core.

[0009] According to some embodiments of the present invention, the first sheet metal part is provided with a first positioning groove, the second sheet metal part is provided with a second positioning groove, and the third sheet metal part is provided with a third positioning groove. The first positioning groove, the second positioning groove and the third positioning groove extend along the height direction of the housing and are connected to the corner of the heat exchange core.

[0010] According to some embodiments of the present invention, the fresh air unit further includes a fresh air filter disposed in the fresh air path, the first sheet metal part is provided with a first slot for fixing one end of the fresh air filter, and the second sheet metal part is provided with a second slot for fixing the other end of the fresh air filter.

[0011] According to some embodiments of the present invention, the fresh air unit further includes an internal circulation valve, which is fixedly connected to the insulation body and connected to the heat exchange core. The internal circulation valve is located between the return air inlet and the fresh air inlet. When the internal circulation valve is opened, it connects the return air inlet and the fresh air inlet to define the internal circulation channel.

[0012] According to some embodiments of the present invention, the internal circulation air valve includes a valve bracket, a motor and a valve, an air guide is provided in the exhaust path, the air guide is provided with a support member connected to the valve bracket, the support member, the air guide and the valve bracket cooperate to define a return air channel, the motor drives the valve to rotate and is connected to the valve bracket, and the valve can close the return air channel when it opens the internal circulation channel.

[0013] According to some embodiments of the present invention, the support portion and / or the internal circulation air valve are provided with a wire passage groove. When the wire passage groove is provided on the support portion, the wire passage groove is integrally formed with the heat preservation body.

[0014] According to some embodiments of the present invention, the fresh air unit further includes an assembly component, wherein the insulation body is integrally formed with a slot adapted to the size of the assembly component, the slot being used to install the assembly component.

[0015] According to some embodiments of the present invention, the insulation body is provided with a mounting bracket, which is used to install the fresh air fan and the exhaust fan. The mounting bracket is fixedly connected to the bottom wall of the housing through a connector passing through the base plate.

[0016] According to some embodiments of the present invention, the housing of the fresh air fan is provided with a first wire clip for fixing the wiring, and the housing of the exhaust fan is provided with a second wire clip for fixing the wiring.

[0017] According to some embodiments of the present invention, the insulation body is made of foam material.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the assembly structure of a fresh air unit according to an embodiment of the present invention;

[0020] Figure 2 This is a front view of the assembly structure of a fresh air unit according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the heat insulation body according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the assembly of the heat insulation body and the shell according to an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 Enlarged structural diagram at point A;

[0024] Figure 6 This is a partial structural schematic diagram of an air inlet duct according to an embodiment of the present invention;

[0025] Figure 7 yes Figure 6 A schematic diagram of the structure after the fresh air valve and air quality sensor are installed in the middle;

[0026] Figure 8 This is a schematic diagram of the assembly of the heat insulation body and the shell according to an embodiment of the present invention;

[0027] Figure 9 yes Figure 4 Enlarged structural diagram at point B;

[0028] Figure 10 yes Figure 8 Enlarged structural diagram at point C;

[0029] Figure 11 yes Figure 8 Enlarged structural diagram at point D;

[0030] Figure 12 yes Figure 8 A magnified structural diagram at point E in the middle.

[0031] Figure label:

[0032] Housing 100; Air inlet 110; Fresh air inlet 120; Return air inlet 130; Exhaust air outlet 140; Electrical control box 150;

[0033] Insulation body 200; frame 201; opening 2011; second mounting position 2012; base plate 202; mounting port 2021; fifth positioning groove 2022; sixth positioning groove 2023; first mounting position 203; air inlet duct 204; fresh air duct 205; return air duct 206; exhaust air duct 207; fifth slot 208; sixth slot 209; first support part 210; eighth slot 211; second support part 22 0; First cable guide groove 221; Third support part 230; Second cable guide groove 231; Air guide part 240; Ninth slot 241; First sheet metal part 250; First positioning groove 251; First slot 252; Third slot 253; Second sheet metal part 260; Second positioning groove 261; Second slot 262; Third sheet metal part 270; Third positioning groove 271; Support part 280; Seventh slot 290; Fourth cable guide groove 291;

[0034] Heat exchanger core 300;

[0035] Fresh air fan 400; First mounting bracket 410; First cable clip 420;

[0036] Exhaust fan 500; Second mounting bracket 510; Second cable clip 520;

[0037] Internal circulation air valve 600; first valve bracket 610; fourth positioning groove 611; fourth slot 612; internal circulation channel 613; tenth slot 614; third wire guide groove 615; fourth wire buckle 616; first valve assembly 620; first motor 621; first valve 622; internal circulation filter 623; return air channel 630;

[0038] Fresh air valve 700; Second valve bracket 710; Third wire clip 711; Second motor 720; Second valve 730;

[0039] Fresh air filter 800;

[0040] 900mm exhaust filter;

[0041] Air quality sensor 1000;

[0042] Positive and negative ion generator 1100;

[0043] Fresh air system 2000. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, 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 a limitation of this invention.

[0046] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0047] In the description of this invention, it should be noted that terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0048] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0049] Reference Figure 1 and Figure 2 As shown, the fresh air unit 2000 of this embodiment includes a housing 100, an insulation body 200, and a heat exchange core 300. The housing 100 is provided with an air inlet 110, a fresh air inlet 120, a return air inlet 130, and an exhaust air outlet 140. The insulation body 200 is an integral foam component made of foam and is installed inside the housing 100. The insulation body 200 matches the inner cavity of the housing 100, allowing it to be securely fastened within the housing 100. The heat exchange core 300 is installed inside the insulation body 200 and is provided with a first heat exchange channel and a second heat exchange channel (not shown in the figures). The insulation body 200 and the heat exchange core 300 cooperate to form a fresh air path by connecting the air inlet 110 and the fresh air inlet 120 through the first heat exchange channel, and an exhaust air path by connecting the return air inlet 130 and the exhaust air outlet 140 through the second heat exchange channel. Figure 1 The dashed line with arrows P1 in the diagram represents the fresh air path, and the dashed line with arrows P2 represents the exhaust air path.

[0050] Reference Figure 1 and Figure 3As shown, Figure 3 The diagram shows the overall structure of the insulation body 200. It can be understood that the insulation body 200 includes a base plate 202 and a frame 201. The frame 201 is arranged along the periphery of the base plate 202. The frame 201 and the base plate 202 cooperate to define the inner cavity of the insulation body 200. The frame 201 and the base plate 202 are integrally formed. The frame 201 has four openings 2011, which correspond one-to-one with the air inlet 110, fresh air inlet 120, return air inlet 130, and exhaust air outlet 140, connecting the inner cavity of the insulation body 200 with the air inlet 110, fresh air inlet 120, return air inlet 130, and exhaust air outlet 140.

[0051] Reference Figure 3 As shown, the inner wall of the frame 201 is provided with a first support portion 210, a second support portion 220, and a third support portion 230 distributed circumferentially along the shell 100. The first support portion 210, the second support portion 220, and the third support portion 230 are sequentially distributed on the three side walls of the frame 201. The first support portion 210, the second support portion 220, and the third support portion 230 are all connected to the heat exchange core 300. The cooperation of the first support portion 210, the second support portion 220, and the third support portion 230 provides a limiting function for the heat exchange core 300, and can provide reliable support for the heat exchange core 300 in the circumferential direction. In addition, the insulation body 200 can reduce the temperature difference between the shell 100 and the indoor air, thereby reducing the generation of condensation. Thus, the insulation body 200 can play a role in insulation and support without the need for additional support components. The insulation body 200 in this embodiment can be made of materials such as expanded polystyrene (EPS) foam and expanded polypropylene (EPP), which have the characteristics of shock resistance and heat insulation. The material of the insulation body 200 is not limited to foam, but can also be materials such as insulation cotton.

[0052] It should be noted that the first support portion 210, the second support portion 220, and the third support portion 230 protrude from the inner wall of the frame 201. All three support portions are integrally foamed with the insulation body 200, which improves structural strength and eliminates the need for additional reinforcements between the support portions and the insulation body 200. The first support portion 210, the second support portion 220, and the third support portion 230 can also be fixedly connected to the base plate 202, or simultaneously connect the frame 201 and the base plate 202.

[0053] Reference Figure 3 and Figure 4As shown, it can be understood that the fresh air unit 2000 in this embodiment of the invention also includes an internal circulation valve 600. The first support portion 210, the second support portion 220, and the third support portion 230 cooperate with the internal circulation valve 600 to define a first mounting position 203 that matches the heat exchange core 300. Figure 4 The space indicated by the square dashed line is the first mounting position 203. The heat exchange core 300 can be assembled in the first mounting position 203. The bottom plate 202 of the insulation body 200 has a mounting port 2021 corresponding to the first mounting position 203. The bottom of the shell 100 has an inspection port corresponding to the mounting port 2021. The heat exchange core 300 is assembled into the first mounting position 203 through the inspection port and the mounting port 2021. The size of the first mounting position 203 can be adjusted by changing the position and protrusion size of the first support 210, the second support 220 and the third support 230, so that heat exchange cores 300 of different shapes and sizes can be matched. During installation, the insulation body 200 is directly assembled into the shell 100, and the heat exchange core 300 is assembled into the first installation position 203. The operation is simple. The insulation body 200 does not need to be spliced. Compared with the foam splicing structure in related technologies, the insulation body 200 adopts an integrated foam component structure, which can effectively solve the condensation phenomenon caused by insufficient sealing between foams. It has sufficiently high strength, reduces the number of parts, helps to save material costs and mold costs, greatly simplifies the assembly structure, reduces the time consumed in assembly, and effectively improves assembly efficiency.

[0054] It should be noted that in some embodiments, when the internal circulation air valve 600 is not required, a fourth support part (not shown in the figure) can be provided inside the insulation body 200. The fourth support part separates the return air duct 206 from the fresh air duct 205. The first support part 210, the second support part 220, the third support part 230 and the fourth support part cooperate to define the first mounting position 203 to support the heat exchange core 300. The specific structure of the fourth support part can be referred to the structure of the first support part 210, the second support part 220 and the third support part 230 in the above embodiments, and will not be described in detail here.

[0055] Reference Figure 1 and Figure 2As shown, it can be understood that the fresh air unit 2000 also includes a fresh air fan 400 and an exhaust fan 500. Both the fresh air fan 400 and the exhaust fan 500 are installed inside the insulation body 200. The air inlet 110, the first heat exchange channel and the fresh air inlet 120 are connected, and the return air inlet 130, the second heat exchange channel and the exhaust air outlet 140 are connected. The fresh air fan 400 is set in the fresh air duct 205 and connected to the fresh air inlet 120, and the exhaust fan 500 is set in the exhaust air duct 207 and connected to the exhaust air outlet 140. Air inlet 110 and exhaust outlet 140 are located on one side of housing 100, and return air outlet 130 and fresh air inlet 120 are located on the other side of housing 100. Air inlet 110 and exhaust outlet 140 can be connected to the outdoor environment through air ducts, and return air outlet 130 and fresh air inlet 120 can be connected to the indoor environment through air ducts. During operation, fresh air fan 400 draws outdoor air in from air inlet 110, and it enters the room through the first heat exchange channel and fresh air inlet 120. Exhaust fan 500 draws indoor air in from return air outlet 130, and it is discharged to the outside through the second heat exchange channel and exhaust outlet 140, thereby introducing fresh air into the room and expelling stale indoor air to the outside, improving indoor air quality. Outdoor air and indoor air exchange heat in heat exchange core 300. Outdoor air absorbs the heat of indoor air and sends it back into the room. Energy can be recovered while fresh air is exchanged, reducing the load on indoor air conditioning.

[0056] Reference Figure 1 and Figure 2As shown, in this embodiment of the invention, the insulation body 200 and the heat exchange core 300 cooperate to define an air inlet duct 204 and an air outlet duct 207. The insulation body 200, the heat exchange core 300, and the internal circulation air valve 600 cooperate to define a fresh air duct 205 and a return air duct 206. The air inlet duct 204, the fresh air duct 205, the return air duct 206, and the air outlet duct 207 are respectively connected to the first mounting position 203. After the heat exchange core 300 is assembled to the first mounting position 203, the air inlet duct 204 connects to the air inlet 110 and the first heat exchange channel, the fresh air duct 205 connects to the fresh air inlet 120 and the first heat exchange channel, the return air duct 206 connects to the return air inlet 130 and the second heat exchange channel, and the air outlet duct 207 connects to the exhaust outlet 140 and the second heat exchange channel. Air inlet duct 204, fresh air duct 205, return air duct 206, and exhaust air duct 207 are distributed circumferentially along the heat exchange core 300. Fresh air fan 400 is installed in fresh air duct 205, and exhaust fan 500 is installed in exhaust air duct 207. Outdoor air enters the room sequentially through air inlet 110, air inlet duct 204, first heat exchange channel, fresh air duct 205, and fresh air outlet 120. Indoor air is discharged to the outside sequentially through return air outlet 130, return air duct 206, second heat exchange channel, exhaust air duct 207, and exhaust outlet 140. This allows outdoor air and indoor air to be exchanged for fresh air along independent ducts. The overall structure is compact, enabling miniaturization of the shell 100 and improving adaptability to different installation scenarios.

[0057] Reference Figure 1 and Figure 2 As shown, the internal circulation air valve 600 is fixed inside the insulation body 200. The internal circulation air valve 600 is located between the return air duct 206 and the fresh air duct 205. The first support part 210 is located between the inlet air duct 204 and the return air duct 206, the second support part 220 is located between the inlet air duct 204 and the exhaust air duct 207, and the third support part 230 is located between the exhaust air duct 207 and the fresh air duct 205. The insulation body 200 is provided with a second mounting position 2012 that matches the internal circulation air valve 600. After the heat exchange core 300 is installed in the first mounting position 203, the internal circulation air valve 600 is inserted into the second mounting position 2012 to fix the heat exchange core 300. The installation is simple and the structural design is more reasonable.

[0058] Reference Figure 1 and Figure 2 As shown, it can be understood that the fresh air unit 2000 in the embodiment also includes assembly components, which include a fresh air valve 700, an air quality sensor 1000, and a positive and negative ion generator 1100. The insulation body 200 has an integrally formed slot adapted to the size of the assembly components. The assembly components are installed in the corresponding slots, which effectively reduces the number of installation parts, simplifies the structure, and makes assembly easier.

[0059] Reference Figure 1and Figure 2 As shown, it can be understood that the fresh air valve 700 is installed inside the air inlet duct 204, and the fresh air valve 700 is used to open or close the air inlet 110. When the fresh air mode is turned on, the fresh air valve 700 is open, the internal circulation valve 600 is closed, the return air duct 206 is not connected to the fresh air duct 205, the fresh air fan 400 introduces fresh air from the outside, and the exhaust fan 500 exhausts the indoor stale air, and heat exchange is carried out through the heat exchange core 300 to keep the indoor air fresh. When ventilation is not required or outdoor air is polluted, the fresh air unit 2000 switches to internal circulation mode. The internal circulation valve 600 opens, allowing the return air duct 206 and the fresh air duct 205 to be connected through the internal circulation channel 613 of the internal circulation valve 600. The internal circulation valve 600 can also control the closure of the return air duct 206, and the fresh air valve 700 controls the closure of the air inlet 110, preventing outdoor air from entering the room. Indoor air flows back into the room through the return air inlet 130, the internal circulation valve 600, and the fresh air inlet 120, achieving indoor air circulation. The internal circulation filter 623 of the internal circulation valve 600 filters the indoor air, ensuring that the indoor air is filtered and purified during circulation, thereby improving indoor air quality.

[0060] Reference Figure 2 , Figure 3 and Figure 4 As shown, it can be understood that the wiring harnesses for the power supply lines and signal lines of the internal circulation damper 600 and the fresh air damper 700 need to be connected to the electrical control box 150 of the fresh air unit 2000. In this embodiment, the electrical control box 150 is installed on the outer wall of the housing 100 and is located on the side close to the fresh air duct 205 and the exhaust air duct 207. Therefore, the power supply line of the internal circulation damper 600 needs to be extended from the return air duct 206 to the fresh air duct 205, and the power supply line of the fresh air damper 700 needs to be extended through the inlet air duct 204 and the exhaust air duct 207 to the fresh air duct 205, so that the power supply lines of the two dampers can be connected to the electrical control box 150 through the insulation body 200 and the housing 100 in the fresh air duct 205. A first wire passage 221 and a second wire passage 231 are provided inside the insulation body 200. The first wire passage 221 connects the air inlet duct 204 and the air outlet duct 207, and the second wire passage 231 connects the fresh air duct 205 and the air outlet duct 207. The wiring of the fresh air valve 700 passes through the first wire passage 221, the air outlet duct 207 and the second wire passage 231 in sequence to reach the fresh air duct 205. The wiring of the fresh air valve 700 can be fixed through the first wire passage 221 and the second wire passage 231.

[0061] Reference Figure 3 , Figure 4 and Figure 5As shown, the internal circulation valve 600 includes a first valve bracket 610 and a first valve assembly 620 mounted on the first valve bracket 610. The frame 201 of the insulation body 200 is provided with a fifth slot 208. One side of the first valve bracket 610 is fixedly connected to the fifth slot 208, and the other side is connected to the heat exchange core 300, so that the first valve bracket 610 is fixed between the return air duct 630 and the fresh air duct 205. The first valve bracket 610 is provided with an internal circulation channel 613 connecting the return air duct 206 and the fresh air duct 205. When the fresh air mode is turned on, the first valve assembly 620 closes the internal circulation channel 613; when the internal circulation mode is turned on, the first valve assembly 620 opens the internal circulation channel 613. A third wire passage 615 is provided on the first valve bracket 610, which can be used to fix the wiring of the first valve assembly 620.

[0062] Reference Figure 2 As shown, Figure 2 The dashed line P4 shown in the diagram represents the wiring path of the fresh air valve 700. Figure 2 The dashed line P5 in the diagram represents the wiring path of the internal circulation damper 600. It can be understood that the first wiring channel 221 and the second wiring channel 231 are integrally formed with the insulation body 200. The power supply line of the fresh air damper 700 passes through the first wiring channel 221 into the exhaust duct 207, and after passing through the exhaust duct 207, it passes through the second wiring channel 231 and enters the fresh air duct 205. The power supply line of the internal circulation damper 600 passes through the third wiring channel 615 to enter the fresh air duct 205. The wiring of the fresh air damper 700 and the internal circulation damper 600 can be connected to the electrical control box 150 through the wiring holes (not shown in the attached diagram) on the insulation body 200 and the housing 100. By using the first wire guide groove 221 and the second wire guide groove 231 to fix the wiring, there is no need to add structures such as strips, sheet metal, and clips to the insulation body 200 to fix the wiring, which effectively reduces the number of parts and saves material costs. After the fresh air valve 700 and the internal circulation air valve 600 are assembled in place, the corresponding wiring can be directly clipped into the first wire guide groove 221 and the second wire guide groove 231, which is simple to operate and effectively improves assembly efficiency.

[0063] Reference Figure 3 and Figure 5 As shown, it can be understood that the first wire guide groove 221 is located on the upper end face of the second support portion 220, and the second wire guide groove 231 is located on the upper end face of the third support portion 230. This facilitates the integral processing of the first wire guide groove 221 and the second wire guide groove 231, and also makes the assembly of the wiring more convenient. The third wire guide groove 615 is located on the upper end face of the first valve bracket 610, which is made of plastic. The third wire guide groove 615 and the first valve bracket 610 can be integrally injection molded, resulting in a stable and reliable structure. Figure 5As shown, a fourth wire clip 616 is also provided on the upper surface of the first valve bracket 610. The fourth wire clip 616 can be used to secure the wiring of the first valve assembly 620 within the third wire passage groove 615, making the wiring structure more stable. It should be noted that after the wiring assembly is completed, the top plate of the housing 100 can further confine the wiring within the corresponding wire passage groove to prevent the wiring from loosening.

[0064] Reference Figure 1 , Figure 2 and Figure 4 As shown, it should be noted that both the fresh air fan 400 and the exhaust fan 500 are centrifugal fans. A first mounting bracket 410 for installing the fresh air fan 400 is provided inside the fresh air duct 205, and a second mounting bracket 510 for installing the exhaust fan 500 is provided inside the exhaust duct 207. Screws or other connectors can be used to pass through the bottom plate 202 of the insulation body 200 to fix both the first mounting bracket 410 and the second mounting bracket 510 to the bottom wall of the housing 100. In other words, there is a foam layer between the first mounting bracket 410 and the bottom wall of the housing 100, and a foam layer between the second mounting bracket 510 and the bottom wall of the housing 100. It can be understood that the foam layers act as a buffer, absorbing the vibrations generated during the operation of the fresh air fan 400 and the exhaust fan 500, thus improving operational stability.

[0065] Reference Figure 3 As shown, it can be understood that a fifth positioning groove 2022 matching the first mounting bracket 410 is provided in the fresh air duct 205, and a sixth positioning groove 2023 matching the second mounting bracket 510 is provided in the exhaust air duct 207. The fifth positioning groove 2022 and the sixth positioning groove 2023 are integrally formed with the insulation body 200, that is, the installation positions of the mounting brackets are reserved on the foam layer, which plays a role in pre-positioning. During assembly, the first mounting bracket 410 and the second mounting bracket 510 can be easily and quickly assembled through the fifth positioning groove 2022 and the sixth positioning groove 2023, and it can also prevent the first mounting bracket 410 and the second mounting bracket 510 from shifting. The fifth positioning groove 2022 and the sixth positioning groove 2023 are both integrally formed with the insulation body 200, and both the fifth positioning groove 2022 and the sixth positioning groove 2023 have raised foam structures. The first mounting bracket 410 and the second mounting bracket 510 abut against the raised foam structures, thereby having a cushioning effect. It should be noted that the insulation body 200 can also be integrally formed with air inlet and exhaust markings (not shown in the attached drawing) as well as markings for different fan matching requirements (not shown in the attached drawing), which facilitates the assembly of fresh air fan 400 and exhaust fan 500.

[0066] Reference Figure 1 and Figure 2As shown, it can be understood that the fresh air fan 400 and the exhaust fan 500 each include a volute, a rotor, and a drive motor. The rotor is installed inside the volute, and the drive motor drives the rotor to rotate inside the volute. Multiple first wire clips 420 are provided on the surface of the volute of the fresh air fan 400, and multiple second wire clips 520 are provided on the surface of the volute of the exhaust fan 500. The wiring of the internal circulation valve 600 enters the fresh air duct 205 after passing through the third wire channel 615. The first wire clips 420 are used to secure the wiring of the internal circulation valve 600 within the fresh air duct 205, making the wiring structure more robust and preventing the wiring from becoming loose and affecting the operation of the fresh air fan 400. The wiring of the fresh air valve 700 enters the exhaust duct 207 after passing through the first wire channel 221. The second wire clips 520 are used to secure the wiring of the fresh air valve 700 within the exhaust duct 207, preventing the wiring from becoming loose and affecting the operation of the exhaust fan 500.

[0067] It should be noted that the first wire clip 420 is integrally formed with the volute of the fresh air fan 400, and the second wire clip 520 is integrally formed with the volute of the exhaust fan 500. The first wire clip 420 and the second wire clip 520 are distributed along the curved contour lines of their respective volutes, making assembly simple and eliminating the need for additional clip structures in the exhaust duct 207 and fresh air duct 205 to fix the wiring. The specific forms of the first wire clip 420 and the second wire clip 520 are not limited to... Figure 1 and Figure 2 The structure of the embodiment shown.

[0068] Reference Figure 2 As shown, the air quality sensor 1000 is installed in the air intake duct 204. The air quality sensor 1000 is a detection device that integrates multiple sensors into one unit. It can be used to detect outdoor air temperature, humidity, PM2.5 concentration, carbon dioxide concentration and other data. Based on the data detected by the air quality sensor 1000, the outdoor air quality is judged. When the outdoor air quality is low, the fresh air unit 2000 can start the internal circulation mode and use the fresh air valve 700 to close the air intake 110 to prevent outdoor air from entering the room and maintain the cleanliness of the indoor air.

[0069] Reference Figure 6 and Figure 7 As shown, Figure 6 The diagram shown is a partial structural schematic of the air inlet duct 204 inside the insulation body 200. Figure 7The diagram shows a partial structural schematic of the fresh air valve 700 and the air quality sensor 1000 installed within the air inlet duct 204. It can be understood that the air inlet duct 204 has a seventh slot 290 and a fourth wiring groove 291, both integrally formed with the insulation body 200. The lower part of the air quality sensor 1000 is inserted into the seventh slot 290 for fixation, while the upper part of the air quality sensor 1000 protrudes from the air inlet duct 204, allowing the air quality sensor 1000 to maintain contact with the air for real-time detection of air quality. The power supply cable of the air quality sensor 1000 is routed along the fourth wiring groove 291.

[0070] Reference Figure 6 As shown, it should be noted that one end of the fourth wire guide groove 291 is connected to the bottom of the seventh slot 290, and the other end of the fourth wire guide groove 291 extends from bottom to top. The power supply lines and signal lines of the air quality sensor 1000 form a wire harness, which is led out from the bottom of the air quality sensor 1000. When the air quality sensor 1000 is assembled into the seventh slot 290, the wire harness runs along the fourth wire guide groove 291, allowing the wiring to extend upward from the bottom of the seventh slot 290. It can be understood that, guided by the fourth wire guide groove 291, the wire harness of the air quality sensor 1000 runs from bottom to top. When condensation occurs on the wire harness, the condensation can flow along the wire harness to the bottom of the seventh slot 290, effectively reducing the risk of condensation entering the interior of the air quality sensor 1000 and making the air quality sensor 1000 operate more stably.

[0071] Reference Figure 7 As shown, the fresh air valve 700 includes a second valve bracket 710 and a second valve assembly disposed on the second valve bracket 710. The second valve bracket 710 is fixedly connected to the air inlet 110 and communicates with the air inlet 110. The second valve assembly includes a second motor 720 and a second valve 730. The second valve 730 is rotatably connected inside the second valve bracket 710, and the second motor 720 is fixedly connected to the outside of the second valve bracket 710. The second motor 720 can drive the second valve 730 to open or close the air inlet 110. The fresh air valve 700, in conjunction with the internal circulation valve 600, realizes the switching between fresh air mode and internal circulation mode.

[0072] Reference Figure 6 and Figure 7As shown, it can be understood that the air inlet duct 204 is provided with a sixth slot 209, which is located near the air inlet 110. The sixth slot 209 is integrally formed with the insulation body 200. The second valve bracket 710 is inserted into the sixth slot 209, so that the fresh air valve 700 is fixedly connected to the insulation body 200. The outer wall surface of the second valve bracket 710 is provided with a third wire buckle 711, which is integrally formed with the second valve bracket 710. The wiring of the air quality sensor 1000 is led out through the fourth wire groove 291 and fixed to the third wire buckle 711, so that the wiring of the air quality sensor 1000 is fixed in the air inlet channel. After passing through the third wire buckle 711, the wiring of the air quality sensor 1000 is concentrated with the wiring of the fresh air valve 700 and passes through the first wire groove 221. In this way, the wiring of the air quality sensor 1000 and the fresh air valve 700 pass through the first wire groove 221, the second wire buckle 520, the second wire groove 231 and the fresh air duct 205 in sequence before entering the electrical control box 150. The wiring structure is reasonably designed and easy to assemble, without relying on additional structures such as bracing or clips for fixation.

[0073] Reference Figure 8 As shown, the positive and negative ion generator 1100 is installed inside the fresh air duct 205. The insulation body 200 also has an eighth slot 211, in which the positive and negative ion generator 1100 is inserted. The eighth slot 211 and the insulation body 200 are integrally formed, further reducing the number of parts and simplifying assembly. The positive and negative ion generator 1100 can generate positive and negative ions that release energy instantaneously by neutralizing positive and negative charges in the air, thereby causing changes in the structure of surrounding bacteria and energy transfer, playing a role in sterilization and deodorization. In fresh air mode and internal circulation mode, the positive and negative ion generator 1100 can purify the air and improve indoor air quality.

[0074] Reference Figure 4 and Figure 8 As shown, it can be understood that the first support portion 210 has a first sheet metal part 250 on its side facing the heat exchange core 300, the second support portion 220 has a second sheet metal part 260 on its side facing the heat exchange core 300, and the third support portion 230 has a third sheet metal part 270 on its side facing the heat exchange core 300. The first sheet metal part 250, the second sheet metal part 260, and the third sheet metal part 270 are all connected to the heat exchange core 300. The first sheet metal part 250, the second sheet metal part 260, and the third sheet metal part 270 help improve the structural strength of the corresponding support portions, making the support structure of each support portion for the heat exchange core 300 more stable and reliable.

[0075] Reference Figure 4 and Figure 8As shown, it should be noted that in the embodiments of the present invention, the first sheet metal part 250 is fixedly connected to the first support part 210 by screws, the second sheet metal part 260 is fixedly connected to the second support part 220 by screws, and the third sheet metal part 270 is fixedly connected to the third support part 230 by screws, so that all three sheet metal parts are effectively fixed. Taking the first sheet metal part 250 and the first support part 210 as examples, the first sheet metal part 250 is integrally formed, and the side of the first sheet metal part 250 matches the side of the first support part 210. A plurality of corresponding screw holes are provided on the first sheet metal part 250 and the first support part 210, and the screw holes are distributed along the height direction of the housing 100. By using screws passing through the screw holes of the first sheet metal part 250 and the first support part 210, the first sheet metal part 250 is fitted and fastened to the side of the first support part 210. It should be noted that fasteners are pre-embedded in the first support part 210, the second support part 220 and the third support part 230. Screw holes are provided in the fasteners so that the first sheet metal part 250, the second sheet metal part 260 and the third sheet metal part 270 are respectively connected to the fasteners, thereby improving the structural stability.

[0076] In some embodiments, the first sheet metal part 250, the second sheet metal part 260, and the third sheet metal part 270 can also be integrally foamed with the insulation body 200, so that the first sheet metal part 250, the second sheet metal part 260, and the third sheet metal part 270 can be correspondingly embedded into the first support part 210, the second support part 220, and the third support part 230, thereby reducing the assembly process of the sheet metal parts.

[0077] Reference Figure 4 As shown, it can be understood that the first sheet metal part 250, the second sheet metal part 260, and the third sheet metal part 270 cooperate with the internal circulation air valve 600 to define the first mounting position 203, and the three sheet metal parts all extend along the height direction of the housing 100, specifically from the bottom wall of the housing 100 to the top wall of the housing 100, so that the first sheet metal part 250, the second sheet metal part 260, and the third sheet metal part 270, as the load-bearing components of the insulation body 200, can play a role in supporting the heat exchange core 300 and the housing 100, which is conducive to improving the overall structural strength of the fresh air unit 2000.

[0078] Reference Figure 9 , Figure 10 and Figure 11 As shown, the first sheet metal part 250 integrally forms a first positioning groove 251, the second sheet metal part 260 integrally forms a second positioning groove 261, and the third sheet metal part 270 integrally forms a third positioning groove 271. The first positioning groove 251, the second positioning groove 261, and the third positioning groove 271 all extend along the height direction of the housing 100. Figure 1 and Figure 4It can be understood that the heat exchange core 300 is generally square, with four corners along its circumference. These corners can also be understood as the corners of the heat exchange core 300. Three of these corners are respectively connected to the first positioning groove 251, the second positioning groove 261, and the third positioning groove 271. The heat exchange core 300, also known as a total heat exchanger, includes four sides, which correspond one-to-one with the inlet air duct 204, the fresh air duct 205, the return air duct 206, and the exhaust air duct 207. The two sides corresponding to the inlet air duct 204 and the fresh air duct 205 are respectively provided with the inlet and outlet of the first heat exchange channel, and the two sides corresponding to the return air duct 206 and the exhaust air duct 207 are respectively provided with the inlet and outlet of the second heat exchange channel. The first and second heat exchange channels are arranged intersectingly within the heat exchange core 300, allowing outdoor air and indoor air to exchange heat within the heat exchange core 300.

[0079] Understandably, the corners of the heat exchange core 300 are right angles, and each right-angled side can abut against the sidewalls of the first positioning groove 251, the second positioning groove 261, and the third positioning groove 271, serving as a limiting element. Along the height direction of the housing 100, the first positioning groove 251, the second positioning groove 261, and the third positioning groove 271 also have a guiding function. During installation, the heat exchange core 300 is inserted into the first mounting position 203 from the upper or lower ends of the first positioning groove 251, the second positioning groove 261, and the third positioning groove 271 along the height direction, thereby enabling the heat exchange core 300 to be quickly assembled into the fresh air unit 2000, resulting in high assembly efficiency. It should be noted that the top of the housing 100 is provided with a top plate (not shown in the attached diagram), on which an inspection port and a cover plate can be opened. The inspection port corresponds to the first mounting position 203, and the cover plate can be used to open or close the inspection port, facilitating the replacement and maintenance of the heat exchange core 300. In some embodiments, an inspection port and a cover plate may be provided at the bottom of the housing 100 simultaneously, so that the heat exchange core 300 can be easily inspected and maintained when the fresh air unit 2000 is hoisted, regardless of whether the top plate or the bottom plate 202 is facing upwards. In addition, a foam board (not shown in the attached drawings) is provided between the insulation body 200 and the top plate of the housing 100. The foam board can cover the air inlet duct 204, the fresh air duct 205, the return air duct 206, and the exhaust air duct 207, thereby improving the insulation performance.

[0080] Reference Figure 1 and Figure 2 As shown, the fresh air unit 2000 also includes a fresh air filter 800 and an exhaust air filter 900. The fresh air filter 800 is installed in the air inlet duct 204, and the exhaust air filter 900 is installed in the air return duct 206. Figure 9 , Figure 10 and Figure 12As shown, the first sheet metal part 250 is provided with a first slot 252 and a third slot 253, the second sheet metal part 260 is provided with a second slot 262, and the internal circulation air valve 600 is provided with a fourth slot 612. The first slot 252 and the second slot 262 are located in the air inlet duct 204. One end of the fresh air filter 800 is fixed in the first slot 252, and the other end of the fresh air filter 800 is fixed in the second slot 262, so that the fresh air filter 800 is fixed in the air inlet duct 204. The third slot 253 and the fourth slot 612 are located in the air return duct 206. One end of the exhaust filter 900 is fixed in the third slot 253, and the other end of the exhaust filter 900 is fixed in the fourth slot 612, so that the exhaust filter 900 is fixed in the air return duct 206.

[0081] Reference Figure 1 As shown, when the fresh air mode is activated, outdoor air enters the room sequentially through the air inlet 110, fresh air valve 700, fresh air filter 800, first heat exchange channel, fresh air fan 400, and fresh air outlet 120. The fresh air filter 800 filters the outdoor air, making the incoming fresh air cleaner. Indoor air is then exhausted outdoors sequentially through the return air inlet 130, exhaust filter 900, second heat exchange channel, exhaust fan 500, and exhaust outlet 140. Since both outdoor and indoor air are filtered before entering the heat exchange core 300, dust and impurities in the air are filtered, reducing contamination of the heat exchange core 300 and extending its service life. The fresh air filter 800 can be a high-efficiency filter to ensure a high level of cleanliness in the indoor air; the exhaust filter 900 can be a pre-filter to effectively filter dust particles and other pollutants in the air. The specific form of the fresh air filter 800 and the exhaust filter 900 is not limited.

[0082] Reference Figure 3 and Figure 8 As shown, the inner wall of the insulation body 200 defines a second mounting position 2012. The first valve bracket 610 matches the second mounting position 2012. One side of the first valve bracket 610 is connected to the fifth slot 208, and the other side of the first valve bracket 610 is provided with a fourth positioning slot 611. The first valve bracket 610 is connected to the heat exchange core 300 through the fourth positioning slot 611, so that the first valve bracket 610 can be fixed between the return air duct 206 and the fresh air duct 205. In addition, the fourth slot 612 is provided on the first valve bracket 610 near the fourth positioning slot 611. Both the fourth slot 612 and the fourth positioning slot 611 extend along the height direction of the first valve bracket 610.

[0083] Reference Figure 12As shown, it can be understood that the first valve bracket 610 defines an internal circulation channel 613. The valve assembly includes a first motor 621, a first valve 622, and an internal circulation filter 623. The first valve 622 is connected to the first motor 621 via a rotating shaft. The first motor 621 can drive the first valve 622 to rotate around the rotating shaft, allowing the first valve 622 to open or close the internal circulation channel 613. The internal circulation filter 623 is disposed in the internal circulation channel 613. When the first valve 622 is open, the return air vent 130 and the fresh air vent 120 are connected through the internal circulation channel 613, and indoor air circulates through the internal circulation channel 613 and is filtered by the internal circulation filter 623. Figure 1 Understandable Figure 1 The dotted line P3 with arrows shown indicates the air supply path of the internal circulation system. The internal circulation filter 623 can be a high-efficiency filter, a formaldehyde removal filter, etc., thereby effectively improving indoor air quality.

[0084] Reference Figure 8 and Figure 12 As shown, it can be understood that the return air duct 206 is provided with an air guide 240. The air guide 240 protrudes from the inner wall of the insulation body 200 and extends along the height direction of the shell 100. The top of the air guide 240 is connected to the first valve bracket 610 through the support member 280. The support member 280, the air guide 240 and the first valve bracket 610 cooperate to define the return air channel 630. The return air channel 630 is located between the return air port 130 and the heat exchange core 300. When the fresh air unit 2000 starts the internal circulation mode, the first motor 621 drives the first valve 622 to open the internal circulation channel 613, and further drives the first valve 622 to rotate a certain angle to reach the return air channel 630, so that the first valve 622 closes the return air channel 630. That is to say, under the drive of the first motor 621, the first valve 622 switches from the position of the internal circulation channel 613 to the position of the return air channel 630. At this time, the indoor air will not be exhausted to the outside, and the fresh air valve 700 will close the air inlet 110, so that the indoor air circulates along the internal circulation channel 613.

[0085] It should be noted that, in combination Figure 2 It is understandable that when the fresh air unit 2000 is in internal circulation mode, indoor air circulates through the internal circulation channel 613. If the first valve 622 does not close the return air channel 630, since the exhaust vent 140 is connected to the return air vent 130, when the outdoor temperature is low, the cold outdoor air will enter the internal circulation channel 613 through the exhaust vent 140 and the return air channel 630, causing the indoor temperature to drop and affecting the user experience. Moreover, the contact between the cold outdoor air and the warm indoor air will also cause condensation to form at the internal circulation valve 600, resulting in water accumulation inside the fresh air unit 2000 and causing the fresh air unit 2000 to drip water.

[0086] Reference Figure 12 As shown, it should be noted that in this embodiment of the invention, a ninth slot 241 is provided at the top of the air guide 240 near the first valve bracket 610, and a tenth slot 614 is provided at the top of the first valve bracket 610 near the air guide 240. The two ends of the support member 280 are respectively engaged in the ninth slot 241 and the tenth slot 614, thereby fixing the support member 280. The support member 280 can be made of foam or aluminum profile. On the one hand, the support member 280 provides support, which can improve the strength of the connection structure of the internal circulation air valve 600, making the internal circulation air valve 600 more stable and reliable; on the other hand, when the first valve 622 closes the return air channel 630, the support member 280 can seal the gap between the first valve 622 and the top plate of the housing 100, reducing the problem of condensation easily generated when indoor air comes into contact with outdoor air at the gap. The structure is practical and reliable.

[0087] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A fresh air machine characterized by, The application relates to a heat exchange device. The heat exchange device comprises a shell, a heat exchange core, a heat preservation main body, a fresh air fan and an exhaust air fan. The shell is provided with an air inlet, a fresh air inlet, an exhaust air inlet and an exhaust air outlet. The heat exchange core is installed in the shell. The heat preservation main body is integrally arranged in the shell and is provided with openings corresponding to the air inlet, the fresh air inlet, the exhaust air inlet and the exhaust air outlet. The heat preservation main body and the heat exchange core cooperatively define an exhaust air path connecting the exhaust air inlet and the exhaust air outlet and a fresh air path connecting the air inlet and the fresh air inlet. The fresh air fan is arranged in the fresh air path and is connected with the fresh air inlet. The exhaust air fan is arranged in the exhaust air path and is connected with the exhaust air outlet. The heat preservation main body comprises a bottom plate and a frame connected with the periphery of the bottom plate. The inner wall of the frame is provided with a first supporting part, a second supporting part and a third supporting part. The first supporting part, the second supporting part and the third supporting part are connected with the heat exchange core. The heat exchange device further comprises an internal circulation air valve.

2. The fresh air machine of claim 1, wherein, The internal circulation air valve is fixedly connected with the heat preservation main body and is connected with the heat exchange core.

3. The fresh air machine of claim 2, wherein, The first supporting part, the second supporting part, the third supporting part and the internal circulation air valve cooperatively define a first mounting position matched with the heat exchange core.

4. The fresh air machine of claim 2, wherein, The heat preservation main body, the heat exchange core and the internal circulation air valve cooperatively define a fresh air air duct and an exhaust air air duct. The fresh air air duct connects the fresh air inlet and a first heat exchange channel of the heat exchange core. The exhaust air air duct connects the exhaust air inlet and a second heat exchange channel of the heat exchange core. The internal circulation air valve is located between the fresh air air duct and the exhaust air air duct. When the fresh air fan opens the internal circulation mode, the internal circulation air valve is opened. The exhaust air air duct and the fresh air air duct are communicated through an internal circulation channel of the internal circulation air valve. The internal circulation air valve can control the closing of the exhaust air air duct. The internal circulation air valve comprises a valve bracket, a motor and a valve. The exhaust air path is provided with a wind guide part. The wind guide part is provided with a supporting piece connected with the valve bracket. The supporting piece, the wind guide part and the valve bracket cooperatively define an exhaust air channel. The motor drives the valve to rotate and connect with the valve bracket. When the valve opens the internal circulation channel, the exhaust air channel can be closed. The first supporting part is fixedly provided with a first metal piece. The second supporting part is fixedly provided with a second metal piece. The third supporting part is fixedly provided with a third metal piece. The first metal piece, the second metal piece and the third metal piece are respectively connected with the heat exchange core. The first metal piece is provided with a first positioning groove. The second metal piece is provided with a second positioning groove. The third metal piece is provided with a third positioning groove. The first positioning groove, the second positioning groove and the third positioning groove respectively extend along the height direction of the shell and are connected with the corner of the heat exchange core. The fresh air fan further comprises a fresh air filter screen arranged in the fresh air path. The first metal piece is provided with a first clamping groove for fixing one end of the fresh air filter screen. The second metal piece is provided with a second clamping groove for fixing the other end of the fresh air filter screen.

5. The fresh air machine of claim 1, wherein, The supporting part and / or the inner circulating air valve are provided with a wire passing groove, and the wire passing groove is integrally formed with the heat preservation main body when the wire passing groove is arranged.

6. The fresh air machine of claim 1, wherein, The fresh air machine further comprises an assembly part, the heat preservation main body is integrally formed with a clamping groove matched with the size of the assembly part, and the clamping groove is used for mounting the assembly part.

7. The fresh air machine of claim 1, wherein, The heat preservation main body is provided with a mounting bracket, the mounting bracket is used for mounting the fresh air fan and the exhaust air fan, and the mounting bracket is fixedly connected to the bottom wall of the shell through a connecting piece penetrating through the bottom plate.

8. The fresh air machine of claim 7, wherein, The shell of the fresh air fan is provided with a first wire buckle used for fixing wiring, and the shell of the exhaust air fan is provided with a second wire buckle used for fixing wiring.

9. The fresh air machine of any one of claims 1 to 8, wherein, The heat preservation main body is made of foam material.

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