Fresh air fan

Abstract

The present invention discloses a fresh air fan, comprising: a shell, the shell having a fresh air inlet, a fresh air outlet, a return air inlet and a return air outlet, a fresh air channel and a return air channel spaced apart from each other formed in the shell, the fresh air channel being connected between the fresh air inlet and the fresh air outlet, the return air channel being connected between the return air inlet and the return air outlet, and the return air channel having an inspection port provided in the shell; an inspection cover, the inspection cover being used to open or close the inspection port; an air quality sensor assembly, the air quality sensor assembly being provided in the return air channel and adjacent to the inspection port. According to the fresh air fan of the present invention, by providing the air quality sensor assembly in the return air channel and adjacent to the inspection port, not only can the indoor air quality be effectively detected, but the air quality sensor assembly can also be maintained through the inspection port, which is simple and convenient.

Description

Technical Field

[0001] The invention relates to the field of household electrical appliances, and in particular to a fresh air fan. Background Art

[0002] Generally, the sensor of the fresh air fan is installed at the outlet of the indoor fresh air. Affected by the fresh air discharged into the room, the sensor cannot truly and effectively detect the indoor air quality. Although the sensor can be installed in the return air duct, the sensor installed in the return air duct is difficult to maintain. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a fresh air fan, which can effectively check the indoor air quality by arranging the air quality sensor assembly in the return air duct and adjacent to the inspection port, and can also maintain the air quality sensor assembly through the inspection port, which is simple and convenient.

[0004] According to an embodiment of the present invention, the fresh air fan includes: a shell, the shell having a fresh air inlet, a fresh air outlet, a return air inlet and a return air outlet, a fresh air channel and a return air channel spaced apart from each other are formed in the shell, the fresh air channel is connected between the fresh air inlet and the fresh air outlet, the return air channel is connected between the return air inlet and the return air outlet, and the return air channel has an inspection port arranged in the shell; an inspection cover, the inspection cover is used to open or close the inspection port; an air quality sensor assembly, the air quality sensor assembly is arranged in the return air channel and adjacent to the inspection port.

[0005] According to the fresh air fan of the embodiment of the present invention, by arranging the air quality sensor assembly in the return air duct and adjacent to the inspection port, not only can the indoor air quality be effectively detected, but the air quality sensor assembly can also be maintained through the inspection port, which is simple and convenient.

[0006] According to some embodiments of the present invention, the air quality sensor assembly is disposed opposite to the inspection port.

[0007] According to some embodiments of the present invention, the fresh air fan includes a heat exchange core, which is arranged in the shell, and the heat exchange core has a first air flow channel and a second air flow channel for mutual heat exchange, and the first air flow channel is connected in series to the fresh air channel; the return air channel includes: an air inlet channel, the two ends of the air inlet channel are respectively connected to the return air inlet and the second air flow channel, the air inlet channel is connected to the return air outlet through the second air flow channel, and the air quality sensor assembly is arranged in the air inlet channel.

[0008] According to some embodiments of the present invention, a first air duct member is provided in the shell, the first air duct member is connected between the return air inlet and the heat exchange core, and the air inlet channel is formed in the first air duct member.

[0009] According to some embodiments of the present invention, the first air duct member is a foam insulation member.

[0010] According to some embodiments of the present invention, an air guide portion is provided on an inner wall surface of the air inlet passage opposite to the heat exchange core, and the air quality sensor assembly is provided on a side of the air guide portion away from the return air inlet.

[0011] According to some embodiments of the present invention, the air guide portion has a first guide surface and a second guide surface that are connected. In the flow direction of the airflow, the first guide surface is located upstream of the second guide surface. The first guide surface extends obliquely toward a direction close to the heat exchange core, and the second guide surface extends obliquely toward a direction away from the heat exchange core.

[0012] According to some embodiments of the present invention, the first guide surface and the second guide surface are transitioned by a rounded corner.

[0013] According to some embodiments of the present invention, the return air inlet is arranged opposite to the heat exchange core; the air inlet channel includes: a main air duct, one end of the main air duct is connected with the return air inlet, and the other end of the main air duct extends toward the direction close to the heat exchange core; and a first sub-air duct, an extension direction of the first sub-air duct and an extension direction of the main air duct have an angle, one end of the first sub-air duct is connected with the other end of the main air duct, a side of the first sub-air duct facing the heat exchange core is open to communicate with the second air flow channel, and the air guide portion is arranged on the inner wall surface of the first sub-air duct.

[0014] According to some embodiments of the present invention, an extension direction of the first sub-air duct is perpendicular to an extension direction of the main air duct.

[0015] According to some embodiments of the present invention, one end of the first sub-air duct away from the main air duct is open to define the inspection port.

[0016] According to some embodiments of the present invention, an inspection notch is provided on the shell, and a portion of the inspection notch overlaps with the inspection opening.

[0017] According to some embodiments of the present invention, the air quality sensor assembly includes a PM2.5 sensor, a CO 2 At least one of a sensor, a formaldehyde sensor, a VOC sensor and a dust sensor.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic diagram of a fresh air fan without an access cover shown according to some embodiments of the present invention;

[0021] Figure 2 is based on Figure 1 A partial structural schematic diagram of a new air blower is shown;

[0022] Figure 3 is based on Figure 1 Schematic diagram of AA direction shown;

[0023] Figure 4 is based on Figure 3 An enlarged view of point B is shown;

[0024] Figure 5 is a schematic diagram of a fresh air fan according to some embodiments of the present invention.

[0025] Reference numerals:

[0026] Fresh air machine 100;

[0027] Shell 1; fresh air inlet a; fresh air outlet b; return air inlet c; return air outlet d; inspection port e; fresh air channel 11; air flow channel 111; return air channel 12; air inlet channel 121; main air channel 1211; first sub-air channel 1212; mounting portion 12121; first chamber 13; second chamber 14;

[0028] Air guide portion 2; first guide surface 21; second guide surface 22;

[0029] Air quality sensor assembly 3;

[0030] Heat exchange core 4;

[0031] First air duct member 5;

[0032] Fresh air impeller 6;

[0033] Return air impeller 7;

[0034] Inspection cover 8;

[0035] Second air duct member 9;

[0036] The third air duct member 10 ; the second sub-air duct 101 . DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0040] Reference below Figure 1-Figure 5 The fresh air fan 100 according to an embodiment of the present invention is described. The fresh air fan 100 can introduce outdoor fresh air into the indoor environment to supply fresh air to the indoor environment. Optionally, the fresh air fan 100 can only have the fresh air function. Of course, the fresh air fan 100 can also have other functions, for example, the fresh air fan 100 has the function of an air conditioner indoor unit, and the fresh air fan 100 is provided with a refrigerant circulation channel and an indoor sensible heat exchanger, etc. The fresh air fan 100 and the air conditioner outdoor unit can be assembled together to achieve the function of cooling or heating the indoor environment.

[0041] like Figure 1-Figure 5 As shown, the fresh air blower 100 according to the embodiment of the present invention may include: a housing 1, an inspection cover 8 and an air quality sensor assembly 3. For example, the air quality sensor assembly 3 includes a PM2.5 sensor, a CO 2 At least one of a sensor, a formaldehyde sensor, a VOC sensor and a dust sensor is used to detect indoor air quality.

[0042] Specifically, Figure 1-Figure 3As shown, the housing 1 has a fresh air inlet a, a fresh air outlet b, a return air inlet c and a return air outlet d, and a fresh air channel 11 and a return air channel 12 spaced apart from each other are formed in the housing 1, the fresh air channel 11 is connected between the fresh air inlet a and the fresh air outlet b, and the return air channel 12 is connected between the return air inlet c and the return air outlet d, the outdoor fresh air can enter the fresh air channel 11 through the fresh air inlet a and circulate in the fresh air channel 11, and then can be discharged into the indoor environment through the fresh air outlet b, the indoor air can enter the return air channel 12 through the return air inlet c and circulate in the return air channel 12, and then can be discharged into the outdoor environment through the return air outlet d. Therefore, by setting the fresh air channel 11, the outdoor fresh air can be supplemented to the indoor environment in time, and by setting the return air channel 12, on the one hand, the indoor dirty air can be discharged to the outdoor environment, and on the other hand, the inflow of indoor fresh air can be balanced and the indoor pressure can be kept stable.

[0043] The air quality sensor assembly 3 is arranged in the return air duct 12. Therefore, when the indoor air enters the return air duct 12 through the return air inlet c, part of the air flow can flow through the air quality sensor assembly 3 so that the air quality sensor assembly 3 can detect the air quality of the indoor return air, thereby detecting the indoor air quality in real time, thereby facilitating the corresponding control of the fresh air fan 100 according to the indoor air quality. For example, when someone smokes indoors, the detection value of the PM2.5 sensor will increase significantly. At this time, the rotation speed of the return air impeller 7 mentioned below can be increased to discharge the smoke as soon as possible.

[0044] Reference Figure 1 and Figure 3 As shown, the return air duct 12 has an inspection port e provided on the shell 1, and the inspection cover 8 is used to open or close the inspection port e. That is to say, the return air duct 12 has an open opening, the open opening is the inspection port e, and the inspection port e is provided on the shell 1, and the inspection cover 8 is used to open or close the inspection port e. It can be seen that a part of the inner wall of the return air duct 12 is defined by the inspection cover 8.

[0045] Reference Figure 3 As shown, the air quality sensor assembly 3 is arranged near the inspection port e. Therefore, when the air quality sensor assembly 3 fails, a person can reach into the shell 1 through the inspection port e to facilitate the repair or replacement of the air quality sensor assembly 3, thereby facilitating the maintenance of the air quality sensor assembly 3 after the fresh air fan 100 is installed on the ceiling.

[0046] Specifically, for example, Figure 1-Figure 5 As shown, the housing 11 is formed into a generally rectangular parallelepiped shape, and the fresh air outlet b and the return air inlet c are located on the same side wall of the housing 1 (for example Figure 3 The fresh air inlet a and the return air outlet d are located on the side wall of the housing 1 opposite to the side wall having the fresh air outlet b and the return air inlet c (eg Figure 3 The shell 1 is provided with a fresh air passage 11 and a return air passage 12, and the return air passage 12 has an inspection port e provided on the shell 1, and the inspection cover 8 is used to open or close the inspection port e. When the inspection cover 8 closes the inspection port e, at least part of the inspection cover 8 constitutes part of the side wall of the return air passage 12. The fresh air fan 100 also includes a fresh air impeller 6 and a return air impeller 7. The fresh air impeller 6 is provided in the fresh air passage 11, and the return air impeller 7 is provided in the return air passage 12. When the fresh air impeller 6 and the return air impeller 7 work at the same time, the outdoor fresh air enters the fresh air passage 11 through the fresh air inlet a and further flows to the fresh air outlet b and is discharged into the indoor environment to replenish fresh air indoors. The indoor dirty air can enter the return air passage 12 through the return air inlet c. Part of the airflow in the return air passage 12 flows through the air quality sensor assembly 3 so that the air quality sensor assembly 3 can detect the air quality of the indoor return air, and then is discharged to the outdoor environment from the return air outlet d. When the air quality sensor assembly 3 is damaged, the inspection cover 8 can be removed, and a person can reach into the housing 1 through the inspection opening e to repair or replace the air quality sensor assembly 3.

[0047] According to the fresh air fan 100 of the embodiment of the present invention, by arranging the air quality sensor assembly 3 in the return air duct 12 and adjacent to the inspection port e, not only can the indoor air quality be effectively detected, but the air quality sensor assembly 3 can also be maintained through the inspection port e, which is simple and convenient.

[0048] In some optional embodiments of the present invention, the air quality sensor assembly 3 is arranged directly opposite to the inspection port e. Figure 3 As shown, the air quality sensor assembly 3 is arranged on the inner wall of the return air duct 12 and is arranged opposite to the inspection port e. Therefore, when the inspection cover 8 is removed, the air quality sensor assembly 3 can be directly seen through the inspection port e, which further facilitates the maintenance and replacement of the air quality sensor assembly 3.

[0049] In some embodiments of the present invention, reference Figure 2-Figure 3 As shown, the fresh air fan 100 includes a heat exchange core 4, which has a first air flow channel (not shown) and a second air flow channel (not shown) for mutual heat exchange, the first air flow channel is connected in series to the fresh air channel 11, and the second air flow channel is connected in series to the return air channel 12.

[0050] Specifically, since the first airflow channel is connected in series to the fresh air channel 11, and the second airflow channel is connected in series to the return air channel 12, the fresh air coming in from the fresh air inlet a first enters the portion of the fresh air channel 11 between the fresh air inlet a and the first airflow channel (e.g., the airflow channel 111 described below), and then the fresh air flows to the first airflow channel; the return air coming in from the return air inlet c first enters the portion of the return air channel 12 between the return air inlet c and the second airflow channel (e.g., the air inlet channel 121 described below), and then flows to the second airflow channel; the fresh air in the first airflow channel and the return air in the second airflow channel exchange heat with each other, and the fresh air after heat exchange continues to flow to the portion of the fresh air channel 11 between the first airflow channel and the fresh air outlet b and is discharged from the fresh air outlet b, and the return air after heat exchange continues to flow to the portion of the return air channel 12 between the second airflow channel and the return air outlet d and is discharged from the return air outlet d. Thus, the fresh air and the return air can exchange heat in the heat exchange core 4, thereby ensuring the stability of the indoor temperature and avoiding indoor heat loss.

[0051] Further, refer to Figure 3 As shown, the return air channel 12 includes an air inlet channel 121, and the two ends of the air inlet channel 121 are respectively connected to the return air inlet c and the second air flow channel, and the air inlet channel 121 is connected to the return air outlet d through the second air flow channel, and the air quality sensor assembly 3 is arranged in the air inlet channel 121. Specifically, the indoor return air can enter the air inlet channel 121 from the return air inlet c and flow through the air quality sensor assembly 3 so that the air quality sensor assembly 3 can detect the indoor air quality, and then the return air flow flows to the second air flow channel, and the air flow finally flows out from the return air outlet d to the outdoor environment. Therefore, by arranging the air quality sensor assembly 3 in the air inlet channel 121, it is convenient for the indoor return air flow to be directly detected by the air quality sensor assembly 3 after entering the return air duct, thereby improving the accuracy of the detection of indoor air quality.

[0052] In some further embodiments, referring to Figure 2 and Figure 3 As shown, a first air duct member 5 is provided in the housing 1, and the first air duct member 5 is connected between the return air inlet c and the heat exchange core 4, and an air inlet channel 121 is formed in the first air duct member 5. Therefore, by forming the air inlet channel 121 in the first air duct member 15, it is beneficial to improve the sealing effect of the air inlet channel 121 and avoid air leakage.

[0053] Specifically, the first air duct component 5 is a foam insulation component, which is not only low in cost, but also helpful in insulating the airflow passing through the air inlet channel 121, avoiding heat loss, and thus helping to ensure that the return airflow flowing from the air inlet channel 121 into the second air flow channel is fully exchanged with the fresh air in the first air flow channel, thereby improving the heat exchange effect.

[0054] Specifically, for example, Figure 2-Figure 3 As shown, the heat exchange core 4 is disposed in the shell 1 and separates the shell 1 into a first chamber 13 ( Figure 2-Figure 3 The chamber shown in FIG. 1 is located on the left side of the heat exchange core 4) and the second chamber 14 ( Figure 2-Figure 3 The chamber shown in the figure is located on the right side of the heat exchange core 4), wherein the return air inlet c and the fresh air outlet b are both connected to the first chamber 13 and the return air inlet c and the return air outlet d are arranged on the side wall of the shell 1 away from the heat exchange core 4 (for example, the left wall), the return air outlet d and the fresh air inlet a are connected to the second chamber 14 and the return air outlet d and the fresh air inlet a are arranged on the side wall of the shell 1 away from the heat exchange core 4 (for example, the right wall), the first air duct member 5 is arranged in the first chamber 13 and the first air duct member 5 is connected between the return air inlet c and the heat exchange core 4, the second air duct member 9 is arranged in the second chamber 14, and the second air duct member 9 is connected to the fresh air inlet a and the heat exchange core 4, an air flow channel 111 is formed in the second air duct member 9, and the air flow channel 111 is respectively connected with the first air flow channel and the fresh air inlet a so that the air flow channel 111 constitutes a part of the fresh air channel 11, and the remaining space of the second chamber 14 excluding the second air duct member 9 can define the remaining part of the return air duct except the air inlet channel 121, and the remaining space of the first chamber 13 excluding the first air duct member 5 can define the remaining part of the fresh air channel 11 excluding the air flow channel 111, a fresh air impeller 6 is provided in the first chamber 13, and a return air impeller 7 is provided in the second chamber 14.

[0055] When the fresh air impeller 6 and the return air impeller 7 are working, the fresh air entering from the fresh air inlet a flows to the air flow channel 111 in the second air duct component 9, and then further flows to the first air flow channel. After flowing out from the first air flow channel, the fresh air flows into the first chamber 13, and is further driven by the fresh air impeller 6 located in the first chamber 13 and is discharged from the fresh air outlet b to the indoor environment; the return air entering from the return air inlet c flows to the air inlet channel 121 of the first air duct component 5, and then the air flow will further flow to the second chamber 14 through the second air flow channel. The return air of the second chamber 14 is further driven by the return air impeller 7 located in the second chamber 14 and discharged from the return air outlet d to the outdoor environment.

[0056] Specifically, Figure 2-Figure 3 As shown, the first air duct member 5 is formed into a substantially L-shape, and the air inlet channel 121 is formed into a substantially L-shape.

[0057] In some embodiments of the present invention, reference Figure 3As shown, an air guide 2 is provided on the inner wall surface of the air inlet channel 121 opposite to the heat exchange core 4, and the air quality sensor assembly 3 is arranged on the side of the air guide 2 away from the return air inlet c. When the airflow enters the air inlet channel 121 from the return air inlet c, the airflow first flows through the air guide 2. Since the air quality sensor assembly 3 is arranged on the side of the air guide 2 away from the return air inlet c, when the airflow flows through the air guide 2, the air guide 2 guides most of the airflow to the heat exchange core 4, so that it is convenient for the airflow to flow to the second airflow channel. At the same time, a small part of the airflow flows to the air quality sensor assembly 3 so that the air quality sensor assembly 3 can detect the air quality of the indoor return air, thereby avoiding the problem of poor detection accuracy of the air quality sensor assembly 3 caused by the large air volume in the return air channel 12, which is conducive to improving the detection accuracy of the air quality sensor assembly 3, and the structure is simple, which is conducive to reducing costs.

[0058] In some optional embodiments of the present invention, referring to Figure 4 As shown, the air guide portion 2 has a first guide surface 21 and a second guide surface 22 that are connected. In the flow direction of the airflow, the first guide surface 21 is located upstream of the second guide surface, and the first guide surface 21 extends obliquely toward the direction close to the heat exchange core 4, and the second guide surface 22 extends obliquely toward the direction away from the heat exchange core 4. Therefore, in the flow direction of the airflow, by setting the first guide surface 21 to extend obliquely toward the direction close to the heat exchange core 4, when the airflow flows through the air inlet channel 121, the first guide surface 21 can guide the airflow in the air inlet channel 121 toward the heat exchange core 4 so that the airflow flows to the second airflow channel; in the flow direction of the airflow, by setting the second guide surface 22 to extend obliquely toward the direction away from the heat exchange core 4, it is convenient for the second guide surface 22 to guide part of the airflow to flow to the air quality sensor assembly 3 so that the air quality sensor assembly 3 can detect the air quality of the indoor return air. The structure is simple and the drainage effect is good.

[0059] In some specific examples, the first guide surface 21 and the second guide surface 22 are transitioned by a rounded corner, which is beneficial to improve the smoothness of the airflow flowing from the first guide surface 21 to the second guide surface 22, thereby providing more air for the detection of the air quality sensor component 3, and at the same time, the air volume is not too large to affect the detection accuracy of the air quality sensor component 3.

[0060] In some embodiments of the present invention, Figure 2-Figure 3 As shown, the return air inlet c is arranged opposite to the heat exchange core 4, that is, the return air inlet c and the heat exchange core 4 are respectively arranged on different side walls of the housing 1. Figure 2 As shown, the return air inlet c is arranged on the left side wall, and the two ends of the heat exchange core 4 are connected to the upper side wall and the lower side wall of the shell 1 respectively.

[0061] It should be noted that, in the description of the present invention, it should be understood that the terms "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. When the placement position of the fresh air fan 100 changes, the corresponding direction also changes, but it can be understood that the return air inlet c, fresh air outlet b and inspection port e of the fresh air fan 100 are always in a state of connection with the room. In particular, when the fresh air fan 100 is installed indoors, the inspection port e is in a position that is not blocked by walls, etc., and is convenient for personnel to perform maintenance through the inspection port e.

[0062] Specifically, refer to Figure 3 As shown, the air inlet channel 121 includes: a main air duct 1211 and a first sub-air duct 1212, one end of the main air duct 1211 is connected with the return air inlet c, and the other end of the main air duct 1211 extends toward the direction close to the heat exchange core 4, and there is an angle between the extension direction of the first sub-air duct 1212 and the extension direction of the main air duct 1211, one end of the first sub-air duct 1212 is connected with the other end of the main air duct 1211 (i.e., the end adjacent to the heat exchange core 4), and the side of the first sub-air duct 1212 facing the heat exchange core 4 is open so that the first sub-air duct 1212 is connected with the second air flow channel through the open side, thereby facilitating the airflow entering the main air duct 1211 from the return air inlet c to further flow to the first sub-air duct 1212 and then flow to the second air flow channel.

[0063] Optionally, the angle between the extension direction of the first sub-duct 1212 and the extension direction of the main duct 1211 is 45°-150°. For example, the angle between the extension direction of the first sub-duct 1212 and the extension direction of the main duct 1211 is 60°, 75°, 82°, 87°, 89.1°, 90°, 93°, 99°, 102°, 107.5°, 111°, 117°, 122°, 131°, 144° or 147°.

[0064] Specifically, the extension direction of the first sub-air duct 1212 is perpendicular to the extension direction of the main air duct 1211, and the side of the first sub-air duct 1212 facing the heat exchange core 4 is open so that the first sub-air duct 1212 is connected to the second air flow channel. Therefore, not only is the structure simple, but it is also conducive to increasing the air outlet area of ​​the air outlet end of the first sub-air duct 1212.

[0065] Specifically, refer to Figure 3As shown, the direction from the return air inlet c to the heat exchange core 4 is defined as the first direction. Along the first direction, the flow area of ​​the cross section of the first sub-air duct 1212 perpendicular to the first direction gradually increases, which is beneficial to increase the air outlet area of ​​the air outlet end of the first sub-air duct 1212.

[0066] Optionally, the air guide 2 is arranged on the inner wall surface of the first sub-air duct 1212. In other words, the air guide 2 is arranged on the inner wall surface of the first sub-air duct 1212 opposite to the heat exchange core 4, and the air quality sensor assembly 3 is adjacent to the inner wall surface of the first sub-air duct 1212 opposite to the heat exchange core 4 and is located downstream of the air guide 2. As a result, not only is the structure simple, but also by arranging the air guide 2 on the inner wall surface of the first sub-air duct 1212 opposite to the heat exchange core 4 and making the air quality sensor assembly 3 adjacent to the inner wall surface of the first sub-air duct 1212 opposite to the heat exchange core 4 and being located downstream of the air guide 2, the air quality sensor assembly 3 is adjacent to the air duct end of the air inlet channel 121, which is conducive to further reducing the influence of high wind speed on the detection accuracy of the air quality sensor assembly 3 and improving the detection accuracy of the air quality sensor assembly 3.

[0067] In some optional embodiments of the present invention, one end of the first sub-air duct 1212 away from the main air duct 1211 is open to define an inspection port e. Specifically, for example, the first air duct member 5 is formed with an air inlet channel 121, that is, the first air duct member 5 is formed with a main air duct 1211 and a first sub-air duct 1212, the main air duct 1211 and the first sub-air duct 1212 are vertically arranged, the first sub-air duct 1212 is provided with an air guide portion 2 on the inner wall surface opposite to the heat exchange core 4, and the first sub-air duct 1212 is provided with a mounting portion 12121, one end of the mounting portion 12121 is connected to the first guide surface 21 and the second guide surface 2 2, the other end of the mounting portion 12121 extends obliquely in the direction away from the return air inlet c toward the direction close to the heat exchange core 4, and then extends in the direction parallel to the heat exchange core 4 and in the direction away from the return air inlet c. The mounting portion 12121, the second guide surface 22 and the inner wall surface of the first sub-air duct 1212 opposite to the heat exchange core 4 define an installation space for placing the air quality sensor assembly 3. The end of the first sub-air duct 1212 away from the main air duct 1211 ( Figure 3 The lower end (shown in FIG. 1 ) is opened to define an inspection port e, which faces the installation space. Thus, not only is the structure simple, but also it is convenient to repair and replace the air quality sensor assembly 3.

[0068] Optionally, the air guide portion 2 can be integrally provided on the above-mentioned first air duct member 5, that is, the air guide portion 2 and the above-mentioned first air duct member 5 are an integrally formed part. This is not only beneficial to simplify the production process and reduce the production cost, but also beneficial to improve the connection strength between the air guide portion 2 and the first air duct member 5.

[0069] Specifically, the air guide portion 2 and the first air duct member 5 are both foam insulation members, thereby achieving a simple structure and low cost.

[0070] In some optional embodiments of the present invention, the return air channel 12 further includes a second sub-air channel 101, and both ends of the second sub-air channel 101 are respectively connected to the main air channel 1211 and the return air outlet d. Specifically, when the airflow flows through the main air channel 1211, when the first sub-air channel 1212 and the second sub-air channel 101 are both in a conducting state, the airflow flowing out of the main air channel 1211 is divided into two parts, one part flows to the first sub-air channel 1212, and the other part flows to the second sub-air channel 101; when one of the first sub-air channel 1212 and the second sub-air channel 101 is in a conducting state, the airflow flowing out of the main air channel 1211 flows to the one of the first sub-air channel 1212 and the second sub-air channel 101 that is in a conducting state. It can be understood that when the airflow in the main air duct 1211 flows to the first sub-duct 1212, this part of the airflow flows through the heat exchange core 4, thereby exchanging heat with the fresh air in the first air flow channel; when the airflow in the main air duct 1211 flows to the second sub-duct 101, this part of the airflow does not pass through the heat exchange core 4 and does not participate in the heat exchange.

[0071] In some optional embodiments of the present invention, a third air duct member 10 is provided in the housing 1, and a second sub-air duct 101 is formed in the third air duct member 10. Optionally, the first air duct member 5 and the third air duct member 10 are foam insulation members, thereby reducing the cost.

[0072] Optionally, the fresh air machine 100 further includes a switch valve assembly, which can be movably arranged in the housing 1 to open or close the first sub-duct 1212 and open or close the second sub-duct 101. For example, the switch valve assembly includes a first switch valve and a second switch valve, wherein the first switch valve is used to open or close the first sub-duct 1212, and the second switch valve is used to open or close the second sub-duct 101. Thus, by setting the switch valve assembly, the first sub-duct 1212 and the second sub-duct 101 are selectively conducted according to the actual needs of the user to select whether the indoor return air passes through the heat exchange core 4. Specifically, the first switch valve can be arranged on the above-mentioned first duct member 5, and the second switch valve can be arranged on the above-mentioned third duct member 10.

[0073] For another example, the switch valve assembly is a switch valve, and the switch valve can be movably disposed in the housing 1 to selectively open one of the first sub-duct 1212 and the second sub-duct 101. For example, the switch valve can be rotatably disposed on the above-mentioned first duct member 5 to selectively open one of the first sub-duct 1212 and the second sub-duct 101. For another example, the switch valve can be movably disposed on the above-mentioned first duct member 5 to selectively open one of the first sub-duct 1212 and the second sub-duct 101. Therefore, by providing a switch valve, not only the structure is simple, but also the first sub-duct 1212 and the second sub-duct 101 can be selectively conducted according to the actual needs of the user to select whether the indoor return air passes through the heat exchange core 4.

[0074] Optionally, the air quality sensor assembly 3 includes a PM2.5 sensor and a CO 2 sensor.

[0075] Optionally, the air quality sensor assembly 3 includes a PM2.5 sensor, a CO 2 Sensor and formaldehyde sensor.

[0076] Optionally, the air quality sensor assembly 3 includes a PM2.5 sensor, a CO 2 Sensors, formaldehyde sensors, VOC sensors and dust sensors.

[0077] In some embodiments of the present invention, the fresh air fan 100 further includes a detection box, and the air quality sensor assembly 3 is disposed in the detection box. Thus, not only is the structure simple, but also the protection of the air quality sensor assembly 3 is facilitated.

[0078] In some examples, the inspection cover 8 is detachably mounted on the housing 1. For example, the inspection cover 8 can be fixed to the housing 1 by screw fasteners. In another example, the inspection cover 8 can be detachably mounted on the housing 1 by a snap-fit ​​structure or the like.

[0079] Specifically, a sealing layer is provided on the surface of the inspection cover 8 facing the inspection port e, so as to prevent the air volume of the return air channel 12 from leaking into the room from the inspection port e, thereby preventing air volume loss. Specifically, the sealing layer is sponge, thus, the structure is simple and the cost is low.

[0080] In some embodiments of the present invention, a maintenance notch is provided on the housing 1 of the fresh air blower 100, and the maintenance port e is located in the maintenance notch, that is, part of the maintenance notch overlaps with the maintenance port e, that is, the maintenance port e constitutes a part of the maintenance notch, and the fresh air blower 100 may have only one maintenance notch, and the air quality sensor assembly 3 in the return air duct 12 can be maintained through the maintenance port e, and other structures in the housing 1 such as the above-mentioned fresh air impeller 6 and return air impeller 7 can be maintained by removing the other parts of the maintenance port e through the maintenance notch. Specifically, the maintenance cover 8 is used to open or close the above-mentioned maintenance notch.

[0081] Of course, the present invention is not limited to this. In other optional embodiments, in addition to the inspection port e, an inspection notch may be further provided on the shell 1 of the fresh air fan 100. That is to say, the inspection notch and the inspection port e may be independent of each other. The air quality sensor assembly 3 in the return air duct 12 can be maintained through the inspection port e, and other structures in the shell 1 such as the fresh air impeller 6 and the return air impeller 7 can be maintained through the inspection notch.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0083] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A new air blower, characterized in that: include: A housing, the housing having a fresh air inlet, a fresh air outlet, a return air inlet and a return air outlet, a fresh air channel and a return air channel spaced apart from each other are formed in the housing, the fresh air channel is connected between the fresh air inlet and the fresh air outlet, the return air channel is connected between the return air inlet and the return air outlet, and the return air channel has an inspection port provided in the housing; An inspection cover, the inspection cover is used to open or close the inspection port; an air quality sensor assembly, the air quality sensor assembly being disposed in the return air passage and adjacent to the inspection port; A heat exchange core, the heat exchange core is arranged in the shell and separates the shell into a first chamber and a second chamber, wherein the return air inlet and the fresh air outlet are both connected to the first chamber and the return air inlet and the return air outlet are arranged on the side wall of the shell away from the heat exchange core, and the return air outlet and the fresh air inlet are connected to the second chamber and the return air outlet and the fresh air inlet are arranged on the side wall of the shell away from the heat exchange core; The heat exchange core has a first air flow channel and a second air flow channel for mutual heat exchange, and the first air flow channel is connected in series to the fresh air channel; The return air channel comprises: an air inlet channel, both ends of the air inlet channel are respectively connected to the return air inlet and the second air flow channel, the air inlet channel is connected to the return air outlet through the second air flow channel, and the air quality sensor assembly is arranged in the air inlet channel; An air guide portion is provided on the inner wall surface of the air inlet passage opposite to the heat exchange core, and the air quality sensor assembly is provided on a side of the air guide portion away from the return air inlet; The air guide portion has a first guide surface and a second guide surface connected to each other. In the flow direction of the airflow, the first guide surface is located upstream of the second guide surface. The first guide surface extends obliquely toward the direction close to the heat exchange core, and the second guide surface extends obliquely toward the direction away from the heat exchange core. A first air duct member is provided in the first chamber, the first air duct member is connected between the return air inlet and the heat exchange core, and the air inlet channel is formed in the first air duct member; the air guide portion and the first air duct member are an integrally formed member; When the air flow flows through the air guide portion, the air guide portion guides most of the air flow to the heat exchange core, thereby facilitating the air flow to the second air flow channel. At the same time, a small amount of air flow flows to the air quality sensor assembly so that the air quality sensor assembly can detect the air quality of the indoor return air.

2. The fresh air blower according to claim 1, characterized in that: The air quality sensor assembly is arranged opposite to the inspection port.

3. The fresh air blower according to claim 1, characterized in that: The first air duct component is a foam insulation component.

4. The fresh air blower according to claim 1, characterized in that: The first guide surface and the second guide surface are transitioned by a rounded corner.

5. The fresh air blower according to claim 1, characterized in that: The return air inlet is arranged opposite to the heat exchange core; The air inlet channel comprises: A main air duct, one end of which is connected to the return air inlet, and the other end of which extends toward a direction close to the heat exchange core; and A first sub-air duct, wherein an extension direction of the first sub-air duct and an extension direction of the main air duct form an included angle, one end of the first sub-air duct is connected with the other end of the main air duct, a side of the first sub-air duct facing the heat exchange core is open to be connected with the second air flow channel, and the air guide portion is provided on an inner wall surface of the first sub-air duct.

6. The fresh air blower according to claim 5, characterized in that: The extension direction of the first sub-air duct is perpendicular to the extension direction of the main air duct.

7. The fresh air blower according to claim 6, characterized in that: One end of the first sub-air duct away from the main air duct is open to define the inspection port.

8. The fresh air blower according to claim 1, characterized in that: An inspection notch is provided on the shell, and a portion of the inspection notch overlaps with the inspection opening.

9. The fresh air blower according to any one of claims 1 to 8, characterized in that: The air quality sensor assembly includes at least one of a PM2.5 sensor, a CO2 sensor, a formaldehyde sensor, a VOC sensor and a dust sensor.

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