Fresh air unit

Abstract

This invention discloses a fresh air ventilator, relating to the field of air handling equipment technology. It comprises a fresh air valve located at the air inlet and an internal circulation valve fixedly connected to the insulation body. The internal circulation valve is located between the fresh air duct connecting the fresh air inlet and the return air duct connecting the return air inlet. The valve controls the opening and closing of the fresh air duct and the return air duct. The insulation body also includes a guide section located in the return air duct, forming a connection between the guide section and the internal circulation valve. When the fresh air ventilator is in internal circulation mode, the valve opens to connect the fresh air duct and the return air duct, and closes the connection. Simultaneously, the fresh air valve closes the air inlet, preventing outdoor air from entering the return air duct from the exhaust vent and preventing outdoor air from entering the fresh air duct from the air inlet. This avoids condensation caused by outdoor air contacting indoor air entering through the return air vent inside the fresh air ventilator, and prevents condensation and dripping inside the fresh air ventilator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air treatment equipment, in particular to a fresh air machine. BACKGROUND

[0002] When the fresh air machine is in the internal circulation mode, indoor air circulates through the internal circulation air duct, but since the exhaust air outlet and the fresh air outlet are both connected to the return air outlet, when the outdoor temperature is low, cold outdoor air will enter the internal circulation air duct through the exhaust air outlet, and contact with the warm indoor air to form condensation at the internal circulation air valve, resulting in water storage inside the fresh air machine and causing water dripping from the fresh air machine. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a fresh air machine which can effectively solve the condensation problem after the fresh air machine is in the internal circulation mode.

[0004] The fresh air machine according to the embodiment of the present application comprises: a shell provided with a fresh air outlet, a return air outlet, an air inlet and an exhaust air outlet; a heat exchange core body installed in the shell; a heat preservation main body fixedly connected in the shell, the heat preservation main body and the heat exchange core body forming an air inlet duct communicating with the air inlet and an exhaust air duct communicating with the exhaust air outlet; an exhaust air fan installed in the exhaust air duct; an internal circulation air valve fixedly connected to the heat preservation main body, the internal circulation air valve, the heat preservation main body and the heat exchange core body forming a fresh air duct communicating with the fresh air outlet and a return air duct communicating with the return air outlet; the internal circulation air valve comprising a bracket and a valve, the bracket forming an airflow passage communicating with the fresh air duct and the return air duct, and the valve being rotatably connected to the bracket to open or close the airflow passage; a fresh air fan installed in the fresh air duct; a fresh air valve fixedly connected to the air inlet to control the opening or closing of the air inlet; wherein the heat preservation main body comprises a wind guide portion located in the return air duct, and the wind guide portion and the internal circulation air valve form a communication port, when the fresh air machine is in the internal circulation mode, the valve opens the airflow passage and closes the communication port, and the fresh air valve closes the air inlet.

[0005] The fresh air machine according to the embodiment of the present application has at least the following beneficial effects:

[0006] The new air valve is arranged at the air inlet, and the internal circulation air valve is fixedly connected to the heat preservation main body, and the internal circulation air valve is located between the new air duct communicating with the new air inlet and the return air duct communicating with the return air inlet, and the valve controls the opening and closing of the new air duct and the return air duct, the heat preservation main body further comprises a wind guide part located at the return air duct, and the wind guide part and the internal circulation air valve form a communication port, when the new air machine is in the internal circulation mode, the valve is opened to communicate the new air duct and the return air duct, and the communication port is closed, at the same time, the new air valve closes the air inlet, so as to prevent the outdoor air from entering the return air duct through the exhaust port, and prevent the outdoor air from entering the new air duct through the air inlet, thereby avoiding the contact between the outdoor air and the indoor air entering through the return air inlet in the internal part of the new air machine to form condensation, avoiding the dripping phenomenon caused by the condensate water in the internal part of the new air machine, and improving the safety of the new air machine; and when the outdoor environment is low temperature, the cold air can be prevented from entering the indoor, so as to reduce the indoor temperature and affect the user experience.

[0007] According to some embodiments of the present application, the heat preservation main body comprises a bottom plate and a frame connected to the periphery of the bottom plate, the frame comprises a first frame wall and a second frame wall located at the return air duct, the support is arranged at the first frame wall, and the wind guide part is arranged on the second frame wall.

[0008] According to some embodiments of the present application, the wind guide part comprises a first wind guide surface and a second wind guide surface, the first wind guide surface is connected to the first frame wall, the second wind guide surface is connected to the second frame wall, and the included angle between the first wind guide surface and the first frame wall is a, which satisfies: 30°≤a≤60°.

[0009] According to some embodiments of the present application, the first wind guide surface and the second wind guide surface are connected, the included angle between the first wind guide surface and the second wind guide surface is b, which satisfies: b≥80°, and the included angle between the second wind guide surface and the second frame wall is c, which satisfies: c≥120°.

[0010] According to some embodiments of the present application, the heat preservation main body further comprises a support, one end of the support is connected to the support, and the other end of the support is connected to the wind guide part, and the support, the wind guide part, the bottom plate and the support form the communication port.

[0011] According to some embodiments of the present application, the internal circulation air valve further comprises a mounting seat and a motor, the mounting seat is fixedly connected to the support, and the motor is fixedly connected to the mounting seat; one side of the support away from the mounting seat is provided with a support column, the valve comprises a rotating shaft part and a door body part connected to each other, and two ends of the rotating shaft part are connected to the output shaft of the motor and the support column respectively.

[0012] According to some embodiments of the present application, the door body is provided with a first sealing element and a second sealing element at two ends thereof respectively; when the fresh air element is in a fresh air mode, the first sealing element is in sealing connection with the support; and when the fresh air element is in an internal circulation mode, the second sealing element is in sealing connection with the air guide portion.

[0013] According to some embodiments of the present application, one side of the support is provided with a guide inlet communicating with the air flow channel, and an inner wall of the support is provided with a slot arranged along a circumferential direction of the air flow channel; the internal circulation air valve further comprises a filter assembly, which can be inserted into the air flow channel through the guide inlet and positioned and connected to the slot.

[0014] According to some embodiments of the present application, the support is provided with a guide inlet slot formed at the guide inlet and connected to the slot, and a width of the guide inlet slot gradually increases from a direction away from the slot.

[0015] According to some embodiments of the present application, the filter assembly is provided with two filter assemblies, i.e., a formaldehyde filter screen and a high-efficiency filter screen, and the support is provided with the guide inlet and the slot corresponding to the formaldehyde filter screen and the high-efficiency filter screen for matched cooperation, and the two slots are arranged at intervals along the air flow channel.

[0016] According to some embodiments of the present application, a core cavity for accommodating the heat exchange core is formed in the heat preservation main body, and the guide inlet communicates with the core cavity.

[0017] According to some embodiments of the present application, the shell is further provided with an air inlet, and the fresh air element further comprises a fresh air valve fixedly connected to the air inlet to control opening or closing of the air inlet, and when the fresh air element is in the internal circulation mode, the fresh air valve closes the air inlet.

[0018] According to some embodiments of the present application, the fresh air valve comprises: a valve body comprising an annular portion provided with a positioning recess, an inner wall of the positioning recess being provided with a through hole communicating with an inner cavity of the annular portion; a buckle connected to an outer side of the annular portion and located at one end of the positioning recess; and a sensor having one end clamped to the buckle and the other end inserted into the positioning recess.

[0019] According to some embodiments of the present application, the buckle comprises first and second clamping arms arranged at intervals, and the sensor is clamped between the first and second clamping arms; and the annular portion is provided with a space for avoiding, and the space for avoiding is provided on an outer side of the first clamping arm away from the buckle.

[0020] According to some embodiments of the present application, the positioning recess is provided with an opening towards the outer wall of the annular portion, the positioning recess comprises a positioning plate connected to the inner wall of the annular portion, and the positioning plate is located at the end of the positioning recess away from the buckle and is spaced apart from the side wall of the opening in the extending direction of the positioning recess.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0023] Figure 1 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0024] Figure 2 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 1 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0025] Figure 3 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 2 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0026] Figure 4 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 1 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0027] Figure 5 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0028] Figure 6 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 5 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0029] Figure 7 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 5 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0030] Figure 8 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 6 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0031] Figure 9 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 1 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0032] Figure 10 Structure schematic view of the fresh air machine of one embodiment of the present application; Figure 9 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0033] Figure 11 Structure schematic view of the fresh air machine of one embodiment of the present application;

[0034] Figure 12 for Figure 11 The diagram shows the structure of the fresh air valve from another angle;

[0035] Figure 13 for Figure 11 Enlarged view of point C in the middle;

[0036] Figure 14 for Figure 12 Enlarged view of point D in the middle.

[0037] Icon labels:

[0038] Housing 100; Air inlet 110; Fresh air inlet 120; Return air inlet 130; Exhaust air outlet 140;

[0039] Insulation body 200; frame 210; base plate 211; side frame 212; first frame wall 2121; second frame wall 2122; first through hole 2123; embedded part 213; first support part 220; second support part 230; third support part 240; air inlet duct 250; fresh air duct 260; return air duct 270; exhaust air duct 280; air guide part 290; connecting port 291; first air guide surface 292; second air guide surface 293; support member 294;

[0040] Heat exchanger core 300;

[0041] 400 fresh air fan;

[0042] 500 exhaust fan;

[0043] Internal circulation damper 600; bracket 610; airflow channel 611; inlet 612; slot 613; limit strip 614; inlet groove 615; first valve 620; rotating shaft 621; door body 622; first seal 623; second seal 624; filter assembly 630; formaldehyde filter 631; high-efficiency filter 632; pull ring 633; ​​mounting base 640; cavity 641; second through hole 642; first motor 650; support column 660; support lug 670;

[0044] Fresh air valve 700; valve body 710; annular part 711; baffle 7111; connecting plate 712; second valve 713; second motor 714; guide groove 715; limiting plate 716; positioning recess 717; opening 7171; positioning plate 7172; baffle 7173; third through hole 718; clearance space 719; buckle 720; first locking arm 721; second locking arm 722; locking groove 723; guide rib 724; sensor 730. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0048] In the description of this invention, unless otherwise explicitly defined, 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.

[0049] Reference Figure 1 As shown, a fresh air unit according to an embodiment of the present invention 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 installed inside the housing 100 to achieve overall insulation of the fresh air unit and effectively prevent condensation. The insulation body 200 can be made of materials such as foam, making the structure more stable and reliable, and easier to process. A core cavity (not shown in the figure) is formed inside the insulation body 200, and the heat exchange core 300 is installed inside the core cavity. The heat exchange core 300 is provided with a first heat exchange channel (not shown in the figure) and a second heat exchange channel (not shown in the figure). The insulation body 200 is formed to cooperate with the heat exchange core 300. An air inlet duct 250, a fresh air duct 260, a return air duct 270, and an exhaust air duct 280 are formed between the insulation body 200 and the heat exchange core 300, respectively. The air inlet duct 250 is connected to the air inlet 110, the fresh air duct 260 is connected to the fresh air outlet 120, the return air duct 270 is connected to the return air outlet 130, and the exhaust air duct 280 is connected to the exhaust outlet 140. Thus, one end of the first heat exchange channel is connected to the air inlet 110 through the air inlet duct 250, and the other end is connected to the fresh air outlet 120 through the fresh air duct 260. One end of the second heat exchange channel is connected to the return air through the return air duct 270, and the other end is connected to the exhaust outlet 140 through the exhaust air duct 280.

[0050] Reference Figure 1 As shown, the fresh air unit in this embodiment of the invention also includes a fresh air fan 400 and an exhaust fan 500. The fresh air fan 400 is installed in the fresh air duct 260 of the insulation body 200, and the exhaust fan 500 is installed in the exhaust duct 280 of the insulation body 200. It can be understood that when the fresh air unit is in fresh air mode, outdoor air sequentially passes through the air inlet 110, the air inlet duct 250, the first heat exchange channel of the heat exchange core 300, the fresh air duct 260, the fresh air fan 400, and the fresh air outlet 120 before entering the room. Figure 1 The dashed line P1 with arrows in the diagram represents the fresh air path; indoor air passes sequentially through return air inlet 130, return air duct 270, the second heat exchange channel of heat exchange core 300, exhaust duct 280, exhaust fan 500, and exhaust outlet 140 before being discharged outdoors. Figure 1 The dashed line P2 with arrows in the diagram represents the exhaust path. Because fresh air and exhaust air can mix through the first and second heat exchange channels, the cold outdoor air is mixed with the warm indoor air, thus achieving indoor and outdoor air circulation and effectively preventing condensation from forming on the fresh air unit.

[0051] Reference Figure 1 As shown, the fresh air unit in this embodiment of the invention also includes an internal circulation valve 600, which is fixedly connected to the insulation body 200 and is located between the fresh air duct 260 and the return air duct 270. When the fresh air unit is in internal circulation mode, indoor air passes sequentially through the return air inlet 130, the return air duct 270, the internal circulation valve 600, the fresh air duct 260, the fresh air fan 400, and the fresh air outlet 120 before being discharged from the room. Figure 1 The dashed line P3 with arrows shown in the diagram represents the inner loop path.

[0052] Reference Figure 1 and Figure 2 As shown, since indoor air does not pass through the heat exchange core 300 in the internal circulation mode, heat exchange with outdoor air cannot occur within the heat exchange core 300. Therefore, the fresh air unit of this embodiment is designed to avoid condensation inside during internal circulation mode. It is understood that the fresh air unit of this embodiment also includes a fresh air valve 700, which is fixedly connected to the air inlet 110 and is used to control the opening or closing of the air inlet 110. (Refer to...) Figure 2 , Figure 3 and Figure 4As shown, the insulation body 200 of this embodiment includes an air guide 290, which is located in the return air duct 270. The air guide 290 and the internal circulation air valve 600 form a communication port 291. The internal circulation air valve 600 also includes a bracket 610 and a first valve 620. The bracket 610 forms an airflow channel 611, and the two ends of the airflow channel 611 are connected to the fresh air duct 260 and the return air duct 270. The first valve 620 is rotatably connected to the bracket 610 to open or close the airflow channel 611, that is, to control the opening and closing of the fresh air duct 260 and the return air duct 270, and to open or close the communication port 291. When the fresh air unit is in internal circulation mode, the first valve 620 is controlled to rotate and open at a certain angle, thereby connecting the fresh air duct 260 and the return air duct 270, and closing the connection port 291 to prevent outdoor air from entering the return air duct 270 from the exhaust port 140. At the same time, the fresh air valve 700 closes the air inlet 110 to prevent outdoor air from entering the fresh air duct 260 from the air inlet 110. This avoids the formation of condensation due to contact between outdoor air and indoor air entering through the return air vent 130 inside the fresh air unit, preventing condensation and dripping inside the unit, thus improving the user experience and preventing damage to the electronic control components from condensation, thereby enhancing the safety of the fresh air unit. When the outdoor environment is cold, the fresh air unit of this embodiment can prevent cold air from entering the room, lowering the indoor temperature and affecting the user experience.

[0053] Reference Figure 2 , Figure 3 and Figure 4As shown, the insulation body 200 includes a frame 210, which includes a base plate 211 and a side frame 212. The side frame 212 surrounds the periphery of the base plate 211. The side frame 212 includes a first frame wall 2121 and a second frame wall 2122 connected to each other, located within the return air duct 270. The first frame wall 2121 has a first through hole 2123 corresponding to the return air inlet 130, and the internal circulation valve 600 is installed on the first frame wall 2121 via a bracket 610. The air guide 290 is located on the second frame wall 2122, extending protruding from the second frame wall 2122 towards the return air duct 270. The air guide 290 can be integrally formed with the base plate 211 and the side frame 212. The air guide section 290 includes a first air guide surface 292 and a second air guide surface 293. The first air guide surface 292 is connected to the first frame wall 2121, and the second air guide surface 293 is connected to the second frame wall 2122. This ensures that the air entering through the first through hole 2123 can flow smoothly into the internal circulation air valve 600 or the heat exchange core 300 under the guidance of the air guide section 290, reducing the air volume loss of the fresh air unit in fresh air mode and internal circulation mode. The connecting port 291 is formed at the connection between the first air guide surface 292 and the second air guide surface 293, which is beneficial to the cooperation effect between the connecting port 291 and the first valve 620, and ensures the sealing effect of the first valve 620 on the connecting port 291.

[0054] Reference Figure 3 As shown, it can be understood that the angle between the first air guide surface 292 and the first frame wall 2121 is defined as 'a', and the angle 'a' between the first air guide surface 292 and the first frame wall 2121 satisfies: 30°≤a≤60°. When 'a' meets the above parameter range, the airflow loss of the return air duct 270 entering the fresh air duct 260 through the internal circulation air valve 600 is small, and the airflow loss of the return air duct 270 entering the exhaust air duct 280 through the heat exchange core 300 is also small, achieving a good balance. When the angle is smaller than the above parameter range, the airflow loss of the return air duct 270 entering the exhaust air duct 280 through the heat exchange core 300 is large; when the angle is larger than the above parameter range, the airflow loss of the return air duct 270 entering the exhaust air duct 280 through the heat exchange core 300 is large.

[0055] Understandably, simulation experiments show that when the opening angle of the first valve 620 is between 50° and 90°, the air flows more smoothly into the internal circulation valve 600 through the return air duct 270, resulting in less airflow loss when the air enters the fresh air duct 260 through the internal circulation valve 600.

[0056] Reference Figure 3As shown, it can be understood that the first air guide surface 292 is connected to the second air guide surface 293. The included angle between the first air guide surface 292 and the second air guide surface 293 is defined as b, which satisfies: b ≥ 80°. In this embodiment of the invention, b satisfies the above parameter range. When the fresh air unit is in fresh air mode, the airflow path between the connection port 291 and the heat exchange core 300 is smoother, which can effectively reduce the airflow loss of the return air duct 270.

[0057] It is understood that the angle between the second air guide surface 293 and the second frame wall 2122 is defined as c, and the angle c between the second air guide surface 293 and the second frame wall 2122 satisfies: c ≥ 120°. In this embodiment of the invention, c satisfies the above parameter range. When the fresh air unit is in fresh air mode, the airflow path between the connection port 291 and the heat exchange core 300 is smoother, which can effectively reduce the airflow loss of the return air duct 270.

[0058] It is understood that in this embodiment of the invention, b and c simultaneously satisfy the corresponding parameter range, which can make the air flow path between the connection port 291 and the heat exchange core 300 smoother, further reduce the air volume loss of the return air duct 270, and improve the exhaust effect.

[0059] Reference Figure 3 As shown, the insulation body 200 also includes a support member 294. One end of the support member 294 is connected to the bracket 610 of the internal circulation air valve 600, and the other end of the support member 294 is connected to the air guide section 290. The two ends of the support member 294 can be connected to the bracket 610 and the air guide section 290 by a snap-fit ​​connection, facilitating assembly. Alternatively, the two ends of the support member 294 can also be connected to the bracket 610 and the air guide section 290 using screws or other fasteners, or clips 720, etc., the specific method is not limited here. The support member 294 can be made of foam or aluminum profile. The support member 294, the air guide section 290, the base plate 211, and the bracket 610 form a communication opening 291. The support component 294 serves two purposes: firstly, it provides support and enhances the strength of the internal circulation damper 600 connection structure, making the internal circulation damper 600 more stable and reliable; secondly, when the fresh air unit is in internal circulation mode, the support component 294 can seal the gap between the first valve 620 and the top plate of the housing 100 (not shown in the figure), making the sealing performance of the connection port 291 better and further preventing outdoor air from entering the return air duct 270 and mixing with indoor air to produce condensation.

[0060] Reference Figure 5 and Figure 8As shown, the internal circulation damper 600 also includes a mounting base 640 and a first motor 650. The mounting base 640 is fixedly connected to the bracket 610, and the mounting base 640 and the bracket 610 can be integrally injection molded. The first motor 650 is fixedly connected to the mounting base 640 and is driven by the first valve 620, thereby driving the first valve 620 to rotate relative to the bracket 610, thus opening or closing the airflow channel 611. A support column 660 is provided on the side of the bracket 610 away from the mounting base 640, and the support column 660 protrudes towards the mounting base 640. The mounting base 640 and the support column 660 are located at the upper and lower ends of the bracket 610, respectively. The first valve 620 includes a connected rotating shaft portion 621 and a door body portion 622. The upper and lower ends of the rotating shaft portion 621 are respectively connected to the output shaft of the first motor 650 and the support column 660, thereby achieving a stable connection with the first valve 620 and making the operation of the first valve 620 more stable. Understandably, in order to further improve space utilization, the mounting base 640 has a cavity 641 for accommodating the first motor 650. The mounting base 640 is provided with a downward-through second through hole 642, through which the output shaft of the first motor 650 passes downward and is assembled with the rotating shaft part 621.

[0061] Reference Figure 5 As shown, to improve the sealing performance of the internal circulation damper 600 when it is closed, a first sealing element 623 is provided at the end of the door body 622 that mates with the bracket 610. The first sealing element 623 can be provided along the periphery of the door body 622 or it can cover the end face of the door body 622; no specific limitation is made here. Therefore, when the fresh air unit is in fresh air mode, the first sealing element 623 is sealed to the bracket 610, preventing airflow between the return air duct 270 and the fresh air duct 260, thus ensuring the exhaust effect of the fresh air unit.

[0062] Reference Figure 5 As shown, it can be understood that, in order to improve the sealing of the communication opening 291 formed by the support member 294, the air guide 290, the base plate 211, and the bracket 610, a second sealing member 624 is provided at the other end of the door body 622. The second sealing member 624 can be provided along the periphery of the door body 622 or can cover the end face of the door body 622, which is not specifically limited here. Therefore, when the fresh air unit is in the internal circulation mode, the second sealing member 624 is sealed to the air guide 290, the support member 294, etc., to prevent outdoor air from entering the return air duct 270 and mixing with indoor air to produce condensation.

[0063] To address the issue of decreased indoor air quality in the recirculation mode of fresh air systems, referring to... Figure 5 and Figure 6As shown, it can be understood that the internal circulation air valve 600 in one embodiment of the present invention also includes a filter assembly 630. The filter assembly 630 is disposed in the airflow channel 611 to purify and filter the air passing through the airflow channel 611, so that the fresh air unit can purify the indoor air when the internal circulation mode is turned on, thereby improving the user's comfort.

[0064] Reference Figure 6 As shown, it can be understood that a port 612 is provided on one side of the bracket 610, which connects the outer side of the bracket 610 and the airflow channel 611. The filter assembly 630 can be inserted into the airflow channel 611 from the outer side of the bracket 610 through the port 612, thus enabling the installation and replacement of the filter assembly 630. A slot 613 is provided on the inner wall of the bracket 610, which is arranged circumferentially along the airflow channel 611. The filter assembly 630 is inserted into the airflow channel 611 from the port 612 and positioned and connected to the slot 613. Under the limiting effect of the slot 613, it achieves a stable connection with the bracket 610, making its assembly more reliable and facilitating installation and replacement.

[0065] Reference Figure 6 As shown, it can be understood that, in order to simplify the assembly of the filter assembly 630, the inner wall of the bracket 610 is provided with two spaced-apart limiting strips 614. The two limiting strips 614 are spaced-apart along the direction of the airflow channel 611. The slot 613 is formed with the inner wall of the bracket 610 through the two limiting strips 614. The slot 613 extends along the insertion direction of the filter assembly 630, so that the filter assembly 630 can be guided and inserted into the airflow channel 611.

[0066] Reference Figure 6 As shown, the bracket 610 also includes an inlet groove 615, which is formed at the inlet port 612. The inlet groove 615 connects to the side of the slot 613 facing the inlet port 612. The inlet groove 615 extends through the slot 613 to the inlet port 612. The inlet groove 615 and the slot 613 can be located on the upper and lower sides of the inner wall of the bracket 610, respectively. The inlet groove 615 has a gradually expanding structure, meaning its width gradually increases from the direction away from the slot 613. This allows the filter assembly 630 to slide smoothly into the slot 613, improving the smoothness of the filter assembly 630's assembly and facilitating its removal and replacement.

[0067] Reference Figure 5 and Figure 6As shown, it can be understood that multiple filter components 630 are provided. These multiple filter components 630 can be selected based on different types of filters needed for the actual product, such as formaldehyde filter 631, high-efficiency filter 632, activated carbon filter, etc. To facilitate the replacement of the filter components 630, the bracket 610 is provided with multiple inlets 612 and multiple slots 613. The multiple inlets 612 and multiple slots 613 are arranged one-to-one, with each set of inlets 612 and slots 613 corresponding to one filter component 630. The filter components 630 are spaced apart along the airflow channel 611; therefore, the inlets 612 and slots 613 are also spaced apart along the airflow channel 611, allowing the internal circulation valve 600 to easily install and replace the filter components 630.

[0068] Reference Figure 5 and Figure 7 As shown, it can be understood that in order to achieve a better purification effect on indoor air, there are two filter components 630, and correspondingly, there are also two inlets 612 and two slots 613. The two filter components 630 are a formaldehyde filter 631 and a high-efficiency filter 632, which enables the internal circulation valve 600 to adsorb formaldehyde and microparticles in the indoor air, purify and filter the indoor air, improve air quality, and enhance the user experience.

[0069] Reference Figure 7 As shown, it can be understood that the formaldehyde filter 631 and the high-efficiency filter 632 are respectively provided with pull rings 633 on the side facing the corresponding inlet 612. The pull rings 633 enable users to easily remove the formaldehyde filter 631 and the high-efficiency filter 632, thereby improving the efficiency of replacing the formaldehyde filter 631 and the high-efficiency filter 632.

[0070] Reference Figure 4 As shown, it can be understood that a core cavity is formed within the insulation body 200 to accommodate the heat exchange core 300. One side of the bracket 610 is fixedly connected to the insulation body 200, or fixedly connected to the shell 100 via the insulation body 200, to achieve stable fixation of the internal circulation air valve 600. The other end of the bracket 610 is provided with an inlet 612, which communicates with the core cavity. Therefore, the user only needs to disassemble the heat exchange core 300 to expose the core cavity (e.g., ...). Figure 4 (The space shown by the dashed line) allows users to install and replace the filter assembly 630 through the space in the core cavity. This provides a larger operating space, making operation simpler and more convenient, reducing operational difficulty, and improving installation and replacement efficiency. The inlet 612 is connected to the core cavity.

[0071] Reference Figure 4As shown, it can be understood that the fresh air unit of this embodiment of the invention, the heat insulation body 200 further includes a first support portion 220, a second support portion 230, and a third support portion 240 fixedly connected to the frame 210. The first support portion 220, the second support portion 230, and the third support portion 240 are fixedly connected to the frame 212, or fixedly connected to the base plate 211, or simultaneously connected to the frame 212 and the base plate 211. The first support portion 220, the second support portion 230, the third support portion 240, and the internal circulation air valve 600 are arranged circumferentially around the housing 100, and are respectively connected to the corner of the heat exchange core 300 on one side facing the core cavity. In this embodiment of the invention, the heat exchange core 300 is square in shape. The first support portion 220, the second support portion 230, and the third support portion 240 are all provided with sheet metal parts (not shown in the figure) for positioning on the side facing the heat exchange core 300. The bracket 610 of the internal circulation air valve 600 is provided with a positioning structure (not shown in the figure) on the side facing the heat exchange core 300. The four corners of the heat exchange core 300 are respectively limited by the sheet metal parts of the first support portion 220, the second support portion 230, the third support portion 240, and the positioning structure of the bracket 610, thereby realizing the circumferential support of the heat exchange core 300, making the connection of the heat exchange core 300 more reliable, and thus facilitating the installation and replacement of the heat exchange core 300.

[0072] Reference Figure 9 and Figure 10 As shown, it can be understood that the frame 212 and the base plate 211 are equipped with embedded parts 213, and the bracket 610 is connected to the embedded parts 213 by fasteners, thereby achieving a stable connection between the internal circulation air valve 600 and the insulation body 200. It can be understood that the embedded parts 213 are metal parts, which can increase the strength of the area of ​​the insulation body 200 used to connect the bracket 610, making the connection of the internal circulation air valve 600 more reliable and improving the durability of the insulation body 200. (Refer to...) Figure 6 and Figure 10 As shown, the bracket 610 has lugs 670 formed at both ends of the airflow channel 611, and the lower end of the bracket 610 also has lugs 670. The insulation body 200 has embedded parts 213 in the area that cooperates with the three lugs 670. The lugs 670 are connected to the corresponding embedded parts 213 by fasteners, which further improves the connection stability of the internal circulation air valve 600.

[0073] Reference Figure 11 and Figure 12As shown, a fresh air valve 700 according to an embodiment of the present invention includes a valve body 710, which includes an annular portion 711, a connecting plate 712, a second valve 713, and a second motor 714. The annular portion 711 is annular in shape and its inner cavity allows air to pass through. One end of the annular portion 711 is provided with a connecting plate 712, which has multiple mounting holes (not shown in the figure). The connecting plate 712 can be fixed to the insulation body 200 by fasteners passing through the mounting holes. The annular portion 711 has guide grooves 715 on its two side walls in the left-right direction. The guide grooves 715 extend in the direction of air flow, facilitating the installation of the rotating shaft of the second valve 713 along the guide grooves 715, and finally rotatably connected to the annular portion 711. The second motor 714 is located on the outside of the annular portion 711. The output shaft of the second motor 714 is drivenly connected to the second valve 713. The rotation of the output shaft of the second motor 714 controls the opening or closing of the second valve 713 of the fresh air valve 700. The inner wall of the annular portion 711 is provided with a limiting plate 716 arranged circumferentially around the annular portion 711. The limiting plate 716 can abut against the second valve 713, thereby limiting the rotation angle of the second valve 713 and improving the control accuracy of the second valve 713. The abutment between the second valve 713 and the limiting plate 716 can also improve the sealing performance of the second valve 713 and reduce air leakage.

[0074] Reference Figure 13 As shown, in an embodiment of the present invention, the fresh air valve 700 further includes a snap-fit ​​720 and a sensor 730. The annular portion 711 is provided with a positioning recess 717, the inner wall of which communicates with the inner cavity of the annular portion 711. Specifically, the inner wall of the positioning recess 717 is provided with a third through hole 718, through which the positioning recess 717 communicates with the inner cavity of the annular portion 711. The snap-fit ​​720 is disposed on the outer side of the annular portion 711 and located at one end of the positioning recess 717. The sensor 730 is snapped into the snap-fit ​​720 and inserted into the positioning recess 717. It should be noted that the sensor 730 can be a temperature sensor, a humidity sensor, a temperature and humidity sensor, etc.

[0075] Understandably, since the inner wall of the positioning recess 717 connects to the inner cavity of the annular portion 711, it facilitates the sensor 730 to detect air data, such as temperature or humidity, through the inner cavity of the annular portion 711. The sensor 730 uses a snap-fit ​​design, making its installation simple and convenient, improving installation efficiency, reducing labor costs, and allowing for easy disassembly during maintenance, thus reducing maintenance difficulty.

[0076] Reference Figure 13As shown in the embodiment of the present invention, the buckle 720 includes a first locking arm 721 and a second locking arm 722 spaced apart, with a locking groove 723 formed between the first locking arm 721 and the second locking arm 722, and the sensor 730 is snapped into the locking groove 723. By employing the structure of the first locking arm 721 and the second locking arm 722, the buckle 720 is simple in design and easy to manufacture. It is understood that, in order to accommodate the shape of the sensor 730, the first locking arm 721 and the second locking arm 722 have an arc-shaped structure, thereby making the locking groove 723 arc-shaped, better securing the sensor 730. It should be noted that the locking groove 723 can also be other shapes, such as polygons.

[0077] Continue to refer to Figure 13 As shown in the embodiment of the present invention, the first clamping arm 721 and the second clamping arm 722 extend in opposite directions to form guide ribs 724. Therefore, the distance between the guide ribs 724 of the first clamping arm 721 and the guide ribs 724 of the second clamping arm 722 gradually increases in the direction away from the clamping slot 723. When installing the sensor 730, the guide ribs 724 play a guiding role, reducing the installation difficulty and improving the installation efficiency.

[0078] Continue to refer to Figure 13 As shown, in an embodiment of the present invention, the annular portion 711 is provided with a clearance space 719, which is disposed on the side of the first locking arm 721 away from the locking slot 723, for example... Figure 13 The clearance space 719 is located on the right side of the first clamping arm 721. Alternatively, the clearance space 719 is located on the side of the second clamping arm 722 opposite to the clamping slot 723. It should be noted that providing the clearance space 719 at the first clamping arm 721 or the second clamping arm 722 allows the first clamping arm 721 or the second clamping arm 722 sufficient space to undergo elastic deformation, which is beneficial for the sensor 730 to be clamped into the clamping slot 723.

[0079] Reference Figure 13 As shown, in an embodiment of the present invention, a baffle 7111 is provided on the outer side of the annular portion 711. The baffle 7111 and the first locking arm 721 are spaced apart, and a clearance space 719 is located between the baffle 7111 and the first locking arm 721. Therefore, during the transportation of the valve body 710, the baffle 7111 acts as a protective buckle 720, effectively reducing the risk of damage to the first locking arm 721 and the second locking arm 722. It can be understood that since the clearance space 719 is provided on the right side of the first locking arm 721, the overall strength of the first locking arm 721 is less than that of the second locking arm 722. The baffle 7111 is located on the side closer to the first locking arm 721, effectively protecting the first locking arm 721 and improving the rationality of the overall structural design of the valve body 710.

[0080] Reference Figure 14As shown, in an embodiment of the present invention, the positioning recess 717 has an opening 7171 on the outer wall of the annular portion 711. The positioning recess 717 includes a positioning plate 7172, which is connected to the inner wall of the annular portion 711. Along the extending direction of the positioning recess 717, for example... Figure 14 As shown in the vertical direction, the latch 720 is located slightly above the positioning recess 717, while the positioning plate 7172 is located below the positioning recess 717, that is, at the end away from the latch 720. The positioning plate 7172 and the sidewall of the opening 7171 are spaced apart, forming a step-like structure between the positioning plate 7172, the inner wall of the annular portion 711, and the sidewall of the opening 7171. The sensor 730 can be installed by first inserting its lower end into the lower part of the positioning recess 717, that is, abutting against the positioning plate 7172. Then, the sensor 730 is swung around its lower end to latch onto the latch 720. It can be understood that during the swung motion of the sensor 730, its lower end abuts against the inner wall of the annular portion 711, preventing the sensor 730 from disengaging from the positioning recess 717. Using this installation method, the sensor 730 is simple and convenient to install.

[0081] Continue to refer to Figure 14 As shown in the embodiment of the present invention, the positioning recess 717 further includes a plurality of baffles 7173, for example, two. The baffles 7173 are bent at right angles, and the two baffles 7173 are spaced apart along the vertical direction on the inner side of the annular portion 711. One end of each baffle 7173 is connected to the annular portion 711, and the other end is connected to the limiting plate 716. The gap between the baffles 7173 facilitates the entry of air from the airflow channel 611 into the positioning recess 717, which is beneficial for the sensor 730 to detect data in the air.

[0082] The fresh air valve 700 used in this embodiment of the invention facilitates the sensor 730 in detecting air temperature or humidity data. The sensor 730 uses a snap-fit ​​design, making its installation simple and convenient, improving installation efficiency, reducing labor costs, and allowing for easy disassembly during maintenance, thus reducing maintenance difficulty.

[0083] 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 device comprises a shell, a heat exchange core, a heat preservation main body, an exhaust fan, an internal circulation air valve, a fresh air fan and a fresh air valve. The shell is provided with a fresh air outlet, a return air outlet, an air inlet and an air outlet. The heat exchange core is installed in the shell. The heat preservation main body is fixedly connected to the shell, and an air inlet air duct and an air outlet air duct are formed between the heat preservation main body and the heat exchange core. The exhaust fan is installed in the air outlet air duct. The internal circulation air valve is fixedly connected to the heat preservation main body, and a fresh air duct and a return air duct are formed between the internal circulation air valve, the heat preservation main body and the heat exchange core. The internal circulation air valve comprises a support and a valve. The support forms an air flow channel connected to the fresh air duct and the return air duct. The valve is rotatably connected to the support to open or close the air flow channel.

2. The fresh air machine of claim 1, wherein: The fresh air fan is installed in the fresh air duct.

3. The fresh air machine of claim 1, wherein: The fresh air valve is fixedly connected to the air inlet to control the opening or closing of the air inlet.

4. The fresh air machine of claim 1, wherein: The heat preservation main body comprises a wind guide part located in the return air duct.

5. The fresh air machine of claim 1, wherein: The wind guide part and the internal circulation air valve form a communication port.

6. The fresh air machine of claim 5, wherein: When the fresh air fan is in an internal circulation mode, the valve opens the air flow channel and closes the communication port, and the fresh air valve closes the air inlet.

7. The fresh air machine of claim 1, wherein: The heat preservation main body comprises a bottom plate and a frame connected to the periphery of the bottom plate. The frame comprises a first frame wall and a second frame wall located in the return air duct. The support is arranged on the first frame wall, and the wind guide part is arranged on the second frame wall. The wind guide part comprises a first wind guide surface and a second wind guide surface. The first wind guide surface is connected to the first frame wall, and the second wind guide surface is connected to the second frame wall. The angle between the first wind guide surface and the first frame wall is a, and 30 DEG <= a <= 60 DEG. The first wind guide surface is connected to the second wind guide surface. The angle between the first wind guide surface and the second wind guide surface is b, and b >= 80 DEG. The angle between the second wind guide surface and the second frame wall is c, and c >= 120 DEG. The heat preservation main body further comprises a support part. One end of the support part is connected to the support, and the other end is connected to the wind guide part. The support part, the wind guide part, the bottom plate and the support form the communication port. The internal circulation air valve further comprises a mounting seat and a motor. The mounting seat is fixedly connected to the support, and the motor is fixedly connected to the mounting seat. The support is provided with a support column on the side away from the mounting seat. The valve comprises a rotating shaft part and a door body part connected to each other. The two ends of the rotating shaft part are connected to the output shaft of the motor and the support column respectively. The two ends of the door body part are provided with a first sealing part and a second sealing part respectively. When the fresh air fan is in a fresh air mode, the first sealing part is sealingly connected to the support. When the fresh air fan is in an internal circulation mode, the second sealing part is sealingly connected to the wind guide part. One side of the support is provided with a guide inlet connected to the air flow channel. The inner wall of the support is provided with an insertion slot arranged along the circumference of the air flow channel. The internal circulation air valve further comprises a filter assembly. The filter assembly can be inserted into the air flow channel through the guide inlet and is positioned and connected to the insertion slot.

8. The fresh air machine of claim 7, wherein: The inner wall of the bracket is provided with two limiting strips arranged at intervals, the two limiting strips and the inner wall of the bracket form the insertion slot, and the insertion slot is arranged in an extension direction of the filter assembly.

9. The fresh air machine of claim 7 or 8, wherein: The bracket is provided with a guide slot, the guide slot is formed at the guide inlet and connected to the insertion slot, and the width of the guide slot gradually increases from the direction away from the insertion slot.

10. The fresh air machine of claim 7, wherein: The filter assembly is provided with two filter assemblies, i.e., a formaldehyde filter screen and a high-efficiency filter screen, the bracket is provided with the guide inlet and the insertion slot corresponding to the formaldehyde filter screen and the high-efficiency filter screen, respectively, and the two insertion slots are arranged at intervals along the airflow channel.

11. The fresh air machine of claim 7, wherein: The heat preservation main body is formed with a core cavity for accommodating the heat exchange core body, and the guide inlet is in communication with the core cavity.

12. The fresh air machine of claim 1, wherein: The fresh air valve comprises: A valve body comprises an annular part provided with a positioning recess, an inner wall of the positioning recess is provided with a through hole, and the through hole is in communication with an inner cavity of the annular part; A buckle is connected to an outer side of the annular part and located at one end of the positioning recess; A sensor is clamped at one end of the buckle and inserted at the other end of the positioning recess.

13. The fresh air machine of claim 12, wherein: The buckle comprises first and second clamping arms arranged at intervals, the sensor is clamped between the first and second clamping arms, the annular part is provided with a space, and the space is located on a side of the first clamping arm away from the second clamping arm.

14. The fresh air machine of claim 12, wherein: An opening is formed in an outer wall of the annular part towards the positioning recess, the positioning recess comprises a positioning plate connected to an inner wall of the annular part, along an extension direction of the positioning recess, the positioning plate is located at one end of the positioning recess away from the buckle, and is arranged at intervals with a side wall of the opening.

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