Air conditioner

Abstract

The utility model discloses an air conditioner. The air conditioner comprises a main body. The main body comprises a machine shell and a base. The air conditioner further comprises a heat exchange fan, a public motor, a fresh air fan, an exhaust fan and a volute assembly, the public motor is located at one end of the heat exchange fan in the length direction, the fresh air fan is located at the other end of the heat exchange fan in the length direction, and the public motor drives the heat exchange fan, the fresh air fan and the exhaust fan to rotate at the same time. The air conditioner further comprises a transmission shaft, the transmission shaft is detachably connected with the heat exchange fan, and the exhaust fan and the fresh air fan are installed and connected to the transmission shaft. According to the air conditioner, the three fans share the same motor, the overall size can be reduced, the number of motors is reduced, and cost is saved. The independent machining quality of each fan is easy to ensure, the overall dynamic balance is also easy to ensure, and later disassembly and maintenance are also convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner. BACKGROUND

[0002] In the related art, some air conditioners are configured with a heat exchange fan, a fresh air fan and an exhaust fan. The heat exchange fan is used to exchange heat between air inside the air conditioner and an indoor space. The fresh air fan inhales fresh air from the outside. The exhaust fan exhausts indoor air. The heat exchange fan, the fresh air fan and the exhaust fan all need to be driven by separate motors, resulting in high cost and large size of the air conditioner.

[0003] If the heat exchange fan, the fresh air fan and the exhaust fan are integrally formed and finally driven by the same motor, on the one hand, the production process is difficult, and the production process needs to be molded and axially positioned multiple times, which is prone to cause poor dynamic balance. Moreover, the difficulty of disassembly for maintenance is also high. Therefore, there is room for improvement. UTILITY MODEL CONTENT

[0004] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides an air conditioner which can save the number of motors and facilitate disassembly and maintenance.

[0005] According to the air conditioner of the present application, the main body comprises a shell, an internal space of the shell is formed with a receiving cavity, and the shell is formed with a heat exchange air inlet and a heat exchange air outlet. The main body comprises a base arranged in the receiving cavity and formed with a volute tongue air duct. The air conditioner comprises a heat exchange fan arranged in the volute tongue air duct.

[0006] The air conditioner further comprises a common motor arranged in the receiving cavity and located at one end in the length direction of the heat exchange fan. The air conditioner further comprises a fresh air fan, which is an axial air inlet and radial air outlet centrifugal fan and is located at the other end in the length direction of the heat exchange fan. The air conditioner further comprises an exhaust fan, which is an axial air inlet and radial air outlet centrifugal fan. The exhaust fan and the fresh air fan are located at the same end of the heat exchange fan, and the common motor drives the heat exchange fan, the exhaust fan and the fresh air fan to rotate synchronously in the working state.

[0007] The air conditioner further comprises a volute assembly in which a fresh air duct and an exhaust air duct are formed, and a fresh air inlet, a fresh air outlet, an exhaust air inlet and an exhaust air outlet are formed on the volute assembly, the fresh air inlet and the fresh air outlet being in communication with the fresh air duct, and the exhaust air inlet and the exhaust air outlet being in communication with the exhaust air duct. The fresh air fan is arranged in the fresh air duct, and rotation of the fresh air fan can cause outdoor air to enter the fresh air duct from the fresh air inlet and enter a room from the fresh air outlet. The exhaust air fan is arranged in the exhaust air duct, and rotation of the exhaust air fan can cause indoor air to enter the exhaust air duct from the exhaust air inlet and be exhausted to the outside from the exhaust air outlet.

[0008] The air conditioner further comprises a transmission shaft which is detachably connected with the heat exchange fan and on which the exhaust air fan and the fresh air fan are mounted.

[0009] According to the air conditioner provided in the embodiments of the present application, the heat exchange fan, the exhaust air fan and the fresh air fan share one motor, so that the overall size can be reduced, the number of motors can be reduced and the cost can be saved. In the present application, the heat exchange fan, the exhaust air fan and the fresh air fan are not integrally formed, but are independently machined, so that the process difficulty is reduced, the quality of each fan is easy to guarantee, and the dynamic balance of the whole is easy to ensure. The transmission shaft is provided, the transmission shaft is detachably connected with the heat exchange fan, and the exhaust air fan and the fresh air fan are mounted on the transmission shaft. When the heat exchange fan is maintained, the exhaust air fan and the fresh air fan do not need to be disassembled, and when the exhaust air fan and the fresh air fan are maintained, the heat exchange fan does not need to be disassembled, so that the disassembly and maintenance in the later stage are facilitated.

[0010] According to some embodiments of the present application, one end of the heat exchange fan is provided with a rotating shaft, and the transmission shaft is detachably connected with the rotating shaft.

[0011] According to some embodiments of the present application, one end of the transmission shaft and the rotating shaft is provided with a plug-in barrel, and the other end is provided with a plug-in column; the barrel cavity of the plug-in barrel is a non-cylindrical cavity, the plug-in column is a non-cylinder, and the plug-in column is located in the plug-in barrel.

[0012] According to some embodiments of the present application, the depth of the plug-in column in the plug-in barrel is n1; the volute assembly comprises a partition wall between the fresh air duct and the exhaust air duct; the distance between the centrifugal fan adjacent to the plug-in barrel and the partition wall is n2, and n2 is greater than or equal to n1.

[0013] According to some embodiments of the present application, a first positioning hole is arranged on the cylinder wall of the plug-in barrel, and the air conditioner further comprises a first fastener fitted in the first positioning hole, and an end of the first fastener is connected to the plug-in column.

[0014] According to some embodiments of the present application, the air conditioner further comprises a first bearing seat arranged on the base, and a first bearing arranged in the first bearing seat and used for supporting the heat exchange fan.

[0015] Specifically, one end of the heat exchange fan is provided with a rotating shaft, the rotating shaft is fitted on the first bearing, and the connection between the rotating shaft and the rotating shaft is located on the side of the first bearing away from the heat exchange fan.

[0016] According to some embodiments of the present application, the transmission shaft comprises at least three shaft segments distributed along the length direction, and each adjacent two shaft segments form a step; two centrifugal fans are assembled on two shaft segments of the transmission shaft, and each centrifugal fan abuts against a step.

[0017] According to some embodiments of the present application, the at least three shaft segments of the transmission shaft comprise a first shaft segment, the first shaft segment is detachably connected with the heat exchange fan; a second shaft segment connected at one end of the first shaft segment away from the heat exchange fan, the circumference of the second shaft segment is smaller than that of the first shaft segment, a first step is formed between the second shaft segment and the first shaft segment, one centrifugal fan is sleeved on the second shaft segment and abuts against the first step; and a third shaft segment connected at one end of the second shaft segment away from the heat exchange fan, the circumference of the third shaft segment is smaller than that of the second shaft segment, a second step is formed between the third shaft segment and the second shaft segment, the other centrifugal fan is sleeved on the third shaft segment and abuts against the second step.

[0018] According to some embodiments of the present application, the at least three shaft segments of the transmission shaft comprise a fourth shaft segment provided with a thread; and the air conditioner further comprises a locking nut fitted on the fourth shaft segment and abutting against the centrifugal fan.

[0019] Specifically, the second shaft segment and the third shaft segment are both non-cylindrical.

[0020] Further, a second positioning hole is arranged on the hub of the centrifugal fan located on the second shaft segment, and the air conditioner further comprises a second fastener fitted in the second positioning hole, and an end of the second fastener is connected to the second shaft segment.

[0021] According to some embodiments of the present application, the exhaust fan is located between the fresh air fan and the heat exchange fan, and the exhaust air outlet is located on a side of the volute assembly facing the heat exchange fan.

[0022] 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

[0023] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, of embodiments of the present application, in which:

[0024] Figure 1 is a perspective view of an air conditioner according to embodiments of the present application;

[0025] Figure 2 is a perspective view of an air conditioner according to some embodiments when the hidden panel and the wind deflector are hidden;

[0026] Figure 3 is a perspective view of one direction inside the main body according to some embodiments;

[0027] Figure 4 is a perspective view of one direction of the bidirectional ventilation assembly and the common motor, heat exchange fan and other components according to some embodiments;

[0028] Figure 5 is Figure 4 a sectional view of the structure shown;

[0029] Figure 6 is an exploded view of the heat exchange fan, the first bearing seat, the exhaust fan, the fresh air fan and other components according to some embodiments;

[0030] Figure 7 is a partial view of one direction of the bidirectional ventilation assembly and the common motor, heat exchange fan and other components according to some embodiments;

[0031] Figure 8 is another partial view of the bidirectional ventilation assembly and the common motor, heat exchange fan and other components according to some embodiments;

[0032] Figure 9 is a side view of the bidirectional ventilation assembly according to some embodiments.

[0033] REFERENCE NUMERALS:

[0034] Air conditioner 10000, main body 1000, cabinet 1, accommodating cavity V1,

[0035] Heat exchange air inlet 101, heat exchange air outlet 102,

[0036] The indoor heat exchanger 2, the base 3, the volute tongue air duct V03,

[0037] The heat exchange fan 41, the rotating shaft 415, the plug-in column 4151, the common motor 42, the output shaft 421, the transmission shaft 43, the plug-in barrel 431, the first positioning hole 4312, the first shaft section 433, the second shaft section 434, the third shaft section 435, the fourth shaft section 436, the first step 437, the second step 438,

[0038] The fresh air fan 6, the exhaust fan 7, the second positioning hole 708,

[0039] The fresh air duct V01, the volute cavity V011, the fresh air cavity V012, the fresh air inlet 801, the first fresh air outlet 802, the mounting port 803, the purification air inlet 804, the second fresh air outlet 808,

[0040] The first volute half 81, the first baffle plate 811, the second volute 82, the second volute half 821, the axial air vent 8211, the fan cover 822,

[0041] The exhaust volute half 9, the exhaust air duct V02, the exhaust air inlet 901, the exhaust air outlet 902,

[0042] The purification piece 11,

[0043] The common volute 12, the fresh air volute part 121, the second baffle plate 1211, the exhaust volute part 122, the partition wall 1207,

[0044] The first bearing seat 131, the first bearing 132, the locking nut 134,

[0045] The panel 15, the wind shield 16. DETAILED DESCRIPTION

[0046] Some embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0047] Unless the context clearly requires otherwise, throughout the description and the claims, the term "comprise", and variations thereof such as "comprises" and "comprising", will be construed to be inclusive in a manner consistent with the term "including", and variations thereof such as "includes", "included", and "including". In describing some embodiments, the expression "connected to" and its derivatives can be used. The term "connected" is used broadly and can encompass both direct and indirect connections, as well as fixed and removable connections. The embodiments disclosed herein are not necessarily limited to the content described herein.

[0048] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0049] In describing some embodiments, the expression "connected" and its derivatives can be used. The term "connected" should be interpreted broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrated; can be directly connected, or indirectly connected through an intermediate medium. The embodiments disclosed herein are not necessarily limited to the content described herein.

[0050] "A, B, and C at least one of" and "at least one of A, B, or C" have the same meaning and include the following combinations of A, B, and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0051] The use of “adapted to” or “configured to” herein means open and inclusive language that does not exclude devices that are adapted to or configured to perform additional tasks or steps.

[0052] As used herein, “about,” “approximately” or “around” includes the recited value and the average value within an acceptable range of deviation from the particular value, as determined by one of ordinary skill in the art considering the measurement in question and the error in measuring the particular quantity (i.e., the limitations of the measurement system).

[0053] As used herein, “parallel,” “perpendicular,” “equal” includes the recited condition and conditions that approximate the recited condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art considering the measurement in question and the error in measuring the particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallel and near parallel, where near parallel can have an acceptable range of deviation of, for example, within 5°; “perpendicular” includes absolute perpendicular and near perpendicular, where near perpendicular can also have an acceptable range of deviation of, for example, within 5°. “Equal” includes absolute equality and near equality, where near equality can have an acceptable range of deviation of, for example, a difference between the two that is less than or equal to 5% of either.

[0054] Some embodiments of the present application provide an air conditioner 10000.

[0055] Generally, the air conditioner 10000 is a split type air conditioner, including an indoor unit and an outdoor unit, the indoor unit and the outdoor unit are connected by a pipeline to transmit refrigerant, the indoor unit includes an indoor heat exchanger 2 and a heat exchange fan 41.

[0056] The outdoor unit includes a compressor, an outdoor heat exchanger, an outdoor fan and a throttling device, the connected compressor, outdoor heat exchanger, throttling device and indoor heat exchanger 2 form a refrigerant circuit, the refrigerant circulates in the refrigerant circuit, and the outdoor heat exchanger and the indoor heat exchanger 2 respectively exchange heat with air. Some air conditioners 10000 can realize a cooling mode, and some air conditioners 10000 can also realize a heating mode.

[0057] The compressor is configured to compress the refrigerant to form high-pressure refrigerant from low-pressure refrigerant.

[0058] The outdoor heat exchanger is configured to exchange heat between outdoor air and refrigerant transferred in the outdoor heat exchanger. For example, the outdoor heat exchanger works as a condenser in the cooling mode of the air conditioner 10000, so that the refrigerant compressed by the compressor is condensed by emitting heat to the outdoor air through the outdoor heat exchanger. The outdoor heat exchanger works as an evaporator in the heating mode of the air conditioner 10000, so that the refrigerant after decompression is evaporated by absorbing heat of the outdoor air through the outdoor heat exchanger.

[0059] In some embodiments, the outdoor heat exchanger can include heat exchange fins to expand the contact area between the outdoor air and the refrigerant transferred in the outdoor heat exchanger, thereby improving the heat exchange efficiency between the outdoor air and the refrigerant.

[0060] The outdoor fan is configured to suck the outdoor air into the outdoor unit and send the outdoor air after heat exchange with the outdoor heat exchanger to the outside, and the outdoor fan provides power for the flow of the outdoor air.

[0061] The throttling member is connected between the outdoor heat exchanger and the indoor heat exchanger 2, and is used to adjust the pressure of the refrigerant flowing through the outdoor heat exchanger and the indoor heat exchanger 2, so as to adjust the flow of the refrigerant flowing between the outdoor heat exchanger and the indoor heat exchanger 2. The flow and pressure of the refrigerant flowing between the outdoor heat exchanger and the indoor heat exchanger 2 will affect the heat exchange performance of the outdoor heat exchanger and the indoor heat exchanger 2. The throttling member can be a throttling pipe, an electronic valve, etc. When the throttling member is an electronic valve, the opening degree of the throttling member is adjustable to adjust the flow and pressure of the refrigerant flowing through the throttling member.

[0062] In some schemes, the air conditioner 10000 can include a four-way valve connected in the refrigerant circuit, and the four-way valve is configured to switch the flow direction of the refrigerant in the refrigerant circuit to make the air conditioner 10000 execute the cooling mode or the heating mode.

[0063] The indoor heat exchanger 2 is configured to exchange heat between indoor air and refrigerant transferred in the indoor heat exchanger 2. In some embodiments, the indoor heat exchanger 2 can include heat exchange fins to expand the contact area between the indoor air and the refrigerant transferred in the indoor heat exchanger 2, thereby improving the heat exchange efficiency between the indoor air and the refrigerant.

[0064] The heat exchange fan 41 is configured to suck the indoor air into the indoor unit and send the indoor air after heat exchange with the indoor heat exchanger 2 to the indoor, and the heat exchange fan 41 provides power for the flow of the indoor air.

[0065] The air conditioner 10000 can include a control device mainly used for controlling the working frequency of the compressor, the opening degree of the throttling member, and some control devices can also control the rotating speed of the outdoor fan and the rotating speed of the heat exchange fan 41, etc. The control device is connected with the compressor, the throttling member, the motor driving the outdoor fan to rotate and the common motor 42 driving the heat exchange fan 41 to rotate through data lines to transmit communication information.

[0066] The control device includes a processor which can include a central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), and can be configured to perform the corresponding operations described in the control device when the processor executes the program stored in the non-transitory computer readable medium coupled to the control device.

[0067] The non-transitory computer readable storage medium can include a magnetic storage device (for example, a hard disk, a floppy disk or a magnetic tape), a smart card or a flash memory device (for example, an erasable programmable read-only memory (EPROM), a card, a stick or a keyboard driver).

[0068] At present, most air conditioners are limited by volume and weight, and the functions that can be realized are relatively limited, and usually only indoor air can be cooled or heated. If the user turns on the air conditioner for a long time, if the indoor air is relatively dirty and stuffy, the window needs to be opened for ventilation, which is not only troublesome, but also the indoor cold air or warm air will quickly flow out of the window during the opening of the window, affecting the comfort of people.

[0069] Some fresh air air conditioners in the related art suck fresh air from the outdoor through a fresh air device, and discharge indoor air through an exhaust device. However, the heat exchange fan, the fresh air device and the exhaust device all need a separate motor to drive, which leads to high cost and large size of the air conditioner.

[0070] In order to solve the above problems, some embodiments of the utility model provide an air conditioner 10000, which can reduce the overall size, reduce the number of motors and save costs by sharing the same motor for the heat exchange fan 41, the exhaust fan 7 and the fresh air fan 6.

[0071] Here, the air conditioner 10000 is an indoor unit. Alternatively, the air conditioner 10000 is a wall-mounted air conditioner, which is usually installed on a wall, for example, can be installed in the upper region of an indoor wall. Of course, the present application does not exclude that in some embodiments, the air conditioner 10000 is a cabinet type air conditioner, or a mobile air conditioner, etc.

[0072] The following describes the air conditioner 10000 according to an embodiment of the present application. Figures 1-9 The detailed description of the air conditioner 10000 according to an embodiment of the present application is as follows.

[0073] Referring to Figures 1-3 The air conditioner 10000 according to an embodiment of the present application includes a main body 1000, which includes a casing 1, an accommodation cavity V1 is formed inside the casing 1, and a heat exchange air inlet 101 and a heat exchange air outlet 102 are formed on the casing 1. The casing 1 can play a protective role and constitute the overall appearance structure of the air conditioner 10000.

[0074] Generally, the casing 1 is a long strip-shaped shell. When the air conditioner 10000 is a wall-mounted air conditioner, the length direction of the casing 1 is arranged along the horizontal direction, that is, the casing 1 is installed on the wall along the transverse direction. In actual products, in order to discharge condensate water, the casing 1 in some embodiments is installed on the wall along the transverse direction and forms a small angle with the horizontal plane.

[0075] Referring to Figure 2 and Figure 3 The main body 1000 further includes an indoor heat exchanger 2, which is arranged in the accommodation cavity V1. As described above, the indoor heat exchanger 2 is a ring in the refrigerant circuit, the inside of the indoor heat exchanger 2 flows through the refrigerant, and is used for refrigerating or heating the air flowing through the surface of the indoor heat exchanger 2. In the air conditioner 10000, the indoor heat exchanger 2 is generally arranged along the length direction of the casing 1.

[0076] For example, the indoor heat exchanger 2 is a two-fold or three-fold heat exchanger, and each fold of the indoor heat exchanger 2 is a plate-shaped structure extending along the length direction.

[0077] Referring to Figure 2 and Figure 3 The main body 1000 further includes a base 3, which is arranged in the accommodation cavity V1. The base 3 is a mounting and supporting structure inside the main body 1000, and the indoor heat exchanger 2 can be mounted on the base 3. For example, a volute tongue air duct V03 is formed on the base 3, and after the indoor air enters the casing 1, the volute tongue air duct V03 guides the flow direction to ensure that the indoor air has a small resistance when flowing through the indoor heat exchanger 2.

[0078] Referring to Figure 2 and Figure 3 The wall-mounted air conditioner 10000 further includes a heat exchange fan 41, which is arranged in the volute tongue air duct V03. When the heat exchange fan 41 rotates, the air can be heat-exchanged between the inside of the air conditioner and the indoor space.

[0079] In some embodiments, the heat exchange fan 41 is, for example, a cross-flow fan, which has low noise and large air volume, and the air speed of the cross-flow fan is distributed more evenly along the axial direction of the cross-flow fan, which is conducive to increasing the air supply distance and air supply range. Moreover, in the case of using a cross-flow fan and arranging the cross-flow fan along the length direction of the heat exchange fan 41, the airflow driven can flow through the entire indoor heat exchanger 2, thereby ensuring the balance of heat exchange efficiency at each position of the indoor heat exchanger 2.

[0080] By arranging the heat exchange air outlet 102 and the heat exchange air inlet 101 in the casing 1, the heat exchange fan 41 can suck indoor air into the casing 1 when operating. After the indoor air exchanges heat with the indoor heat exchanger 2, the heat-exchanged air is sent to the indoor space from the heat exchange air outlet 102.

[0081] In this way, the adjustment of the indoor environment temperature can be realized. The indoor heat exchanger 2 can act as an evaporator to provide a refrigeration airflow toward the indoor space from the heat exchange air outlet 102, or the indoor heat exchanger 2 can act as a condenser to provide a heating airflow toward the indoor space from the heat exchange air outlet 102.

[0082] In some embodiments, in the height direction of the main body 1000, the heat exchange air inlet 101 is located above the heat exchange air outlet 102, so that the air can be inhaled from above and exhaled from below. Here, the height direction of the main body 1000 is the up-down direction.

[0083] Specifically, the air conditioner 10000 is a wall-mounted air conditioner, and the main body 1000 is usually installed on a wall. In order to avoid interfering with people's daily life, the main body 1000 is usually hung at a high position. By arranging the main body 1000 to blow heat exchange air from below, the blown heat exchange air is less likely to be blocked by the roof or the ground. Thus, the heat exchange air has small resistance consumption during the blowing process, and the air supply range is wide, so that the heat exchange air can flow to the entire indoor space as soon as possible, thereby improving the heat exchange efficiency.

[0084] Referring to Figure 1 and Figure 2 , the heat exchange air inlet 101 is located above the heat exchange air outlet 102, and the heat exchange air inlet 101 can inhale air from above. In this way, air can be prevented from being inhaled from the heat exchange air outlet 102, and the heat exchange air blown out from the heat exchange air outlet 102 can be prevented from being directly sucked into the heat exchange air inlet 101, thereby reducing the heat exchange air idling without participating in the indoor heat exchange process.

[0085] In some embodiments, the heat exchange air inlet 101 is located at the top of the casing 1, i.e., in an area that cannot be seen by the user, thereby hiding the heat exchange air inlet 101 and improving the appearance of the air conditioner 10000.

[0086] In some embodiments, the heat exchange air outlet 102 is located at the front of the casing 1, i.e. the heat exchange air outlet 102 blows air to the front side of the main body 1000.

[0087] It can be understood that the side of the main body 1000 connected to the wall is generally referred to as the back or rear side, and the side opposite to the rear side is referred to as the front side. Therefore, when the heat exchange air outlet 102 is located at the front of the casing 1, the air blown by the heat exchange air outlet 102 is away from the wall, and the air blowing resistance is small, and the air blowing range is wide.

[0088] In some specific embodiments, the air conditioner 10000 is a wall-mounted air conditioner, and the heat exchange air outlet 102 is located at the front side of the casing 1 and close to the bottom, for example, the heat exchange air outlet 102 is located at the front lower corner of the casing 1. In this case, the heat exchange air blown by the heat exchange air outlet 102 flows forward and downward at the same time, so that the heat exchange air can sink and fall on a person or object on the ground after being blown to a certain distance, so that the person or object on the ground can be in the suitable indoor environment as soon as possible.

[0089] With reference to Figures 3-5 , the air conditioner 10000 further comprises a common motor 42, which is arranged in the accommodating cavity V1 and located at one end of the heat exchange fan 41 in the length direction. In this way, the installation and maintenance of the common motor 42 are facilitated, and the overall height and thickness of the main body 1000 do not need to be increased due to the arrangement of the common motor 42.

[0090] Here, the height direction of the main body 1000 is consistent with the up-down direction, and the thickness direction of the main body 1000 is consistent with the front-rear direction. It can be understood that the air conditioner 10000 is generally in a long strip shape, and the length direction of the heat exchange fan 41 is the same as the length direction of the main body 1000, which is the left-right direction shown in FIG. 1. Figures 1-4

[0091] With reference to Figures 5-6 , the air conditioner 10000 further comprises a fresh air fan 6, which is a centrifugal fan with axial air inlet and radial air outlet, and is located at the other end of the heat exchange fan 41 in the length direction, i.e. the fresh air fan 6 is located on the side of the heat exchange fan 41 away from the common motor 42.

[0092] With reference to Figures 5-6 , the air conditioner 10000 further comprises an exhaust fan 7, which is a centrifugal fan with axial air inlet and radial air outlet.

[0093] Among them, the exhaust fan 7 and the fresh air fan 6 are located at the same end of the heat exchange fan 41, and the common motor 42 drives the heat exchange fan 41, the exhaust fan 7 and the fresh air fan 6 to rotate synchronously in the working state.

[0094] ​The centrifugal fan itself has the characteristics of compact structure, large air volume, low noise, and the fan noise significantly decreases when the rotating speed decreases. Therefore, the fresh air fan 6 and the exhaust fan 7 can select a smaller size centrifugal fan to meet the demand for large air volume. The centrifugal fan has small vibration noise and is not easy to resonate with the indoor heat exchanger 2, which is beneficial to reduce the overall vibration and noise of the air conditioner 10000.

[0095] The fresh air fan 6 and the exhaust fan 7 both adopt centrifugal fans, and the air directions of the fresh air fan 6 and the exhaust fan 7 can be reasonably arranged. For example, the fresh air fan 6 takes in air along the axial direction and discharges air along the radial direction, the exhaust fan 7 takes in air along the axial direction and discharges air along the radial direction, the fresh air fan 6 and the exhaust fan 7 take in air from two ends away from each other, and then the fresh air and the exhaust air are driven to be discharged along the radial direction. The flow paths of the fresh air and the exhaust air do not need to overlap in the axial direction, and the paths do not need to intersect. This helps to reduce the design of the avoidance corner of the fresh air and exhaust air paths, reduce air resistance and energy consumption, ensure air volume, and reduce noise.

[0096] The fresh air fan 6 and the exhaust fan 7 both adopt centrifugal fans, and the heat exchange fan 41, the exhaust fan 7, and the fresh air fan 6 are driven by the same motor. This not only saves the number of motors, reduces the overall size, saves costs, but also keeps the three fans stacked along the axial direction of the common motor 42.

[0097] In some embodiments, the centrifugal fan itself is relatively flat in the axial direction, and the stacking of the fresh air fan 6 and the exhaust fan 7 can reduce the overall axial size occupied, so that the length of the main body 1000 does not need to be too long. Since the heat exchange fan 41, the exhaust fan 7, and the fresh air fan 6 are driven by the same motor, the three fans rotate synchronously and in unison, and the fresh air fan 6 and the exhaust fan 7 do not need to be separated by a large gap. The axial distance between the fresh air fan 6 and the exhaust fan 7 can be arranged to be relatively close.

[0098] The common motor 42, the heat exchange fan 41, the exhaust fan 7, and the fresh air fan 6 are arranged in the length direction of the main body 1000, rather than in the thickness or height direction of the main body 1000, so that the main body 1000 of the air conditioner 10000 has a slender appearance and is thin and light.

[0099] Optionally, the common motor 42 is an external rotor motor. Optionally, the common motor 42 is an internal rotor motor.

[0100] Referring to Figure 5 , the air conditioner 10000 further includes a volute assembly, and the volute assembly forms a fresh air duct V01 and an exhaust air duct V02. Referring to Figures 7-9The volute assembly is provided with a fresh air inlet 801, a fresh air outlet, an exhaust air inlet 901 and an exhaust air outlet 902. The fresh air inlet 801 and the fresh air outlet are both in communication with the fresh air duct V01. The exhaust air inlet 901 and the exhaust air outlet 902 are both in communication with the exhaust air duct V02.

[0101] The fresh air fan 6 is arranged in the fresh air duct V01. The fresh air fan 6 rotates to enable outdoor air to enter the fresh air duct V01 from the fresh air inlet 801 and to enable the outdoor air in the fresh air duct V01 to enter the indoor environment from the fresh air outlet. The fresh air fan 6 is used to drive air flow to be sucked in from the fresh air inlet 801 and to be discharged to the indoor environment through the fresh air outlet. The operation of the fresh air fan 6 provides the driving force for the flow of fresh air.

[0102] In this way, by arranging the fresh air duct V01 in cooperation with the fresh air fan 6, when the air in the indoor environment is relatively dirty or the air quality is poor, the relatively fresh outdoor air can be driven by the fresh air fan 6 to enter the indoor environment, so as to improve the air flow environment in the indoor environment.

[0103] In the present application, the number of fresh air outlets can be one, or the number of fresh air outlets can be multiple, for example, two, three, four or more. By arranging multiple fresh air outlets, the air discharge volume can be increased.

[0104] Alternatively, the number of fresh air outlets is multiple, and the multiple fresh air outlets are arranged in the same direction.

[0105] Alternatively, the number of fresh air outlets is multiple, and the multiple fresh air outlets are arranged in different directions.

[0106] In some embodiments, referring to Figures 7-9 The fresh air outlet includes a first fresh air outlet 802 and a second fresh air outlet 808, and the first fresh air outlet 802 and the second fresh air outlet 808 are both in communication with the fresh air duct V01. The fresh air fan 6 rotates to enable outdoor air to enter the fresh air duct V01 from the fresh air inlet 801 and to enable the outdoor air in the fresh air duct V01 to enter the indoor environment from the first fresh air outlet 802 and the second fresh air outlet 808.

[0107] The exhaust air fan 7 is arranged in the exhaust air duct V02. The exhaust air fan 7 rotates to enable indoor air to enter the exhaust air duct V02 from the exhaust air inlet 901 and to enable the indoor air in the exhaust air duct V02 to be discharged to the outdoor environment from the exhaust air outlet 902. The exhaust air fan 7 is used to drive air flow to be sucked in from the exhaust air inlet 901 and to be discharged to the outdoor environment through the exhaust air outlet 902. The operation of the exhaust air fan 7 provides the driving force for the flow of dirty air.

[0108] Therefore, by setting the exhaust air duct V02 in cooperation with the exhaust fan 7, when the indoor air is relatively dirty or the air quality is poor, the dirty air flow in the indoor space can be sucked and discharged by the exhaust fan 7. In this way, after the indoor air volume is reduced, fresh air can be sucked from the outside or from other rooms through doors and windows, so as to reduce the degree of dirtiness of the indoor air.

[0109] The fresh air fan 6, the exhaust fan 7, and the volute assembly constitute a bidirectional ventilation assembly, which is arranged in the main body 1000. The bidirectional ventilation assembly can provide fresh air for the indoor space and can discharge indoor air to the outdoor space.

[0110] It should be noted that in the air conditioner 10000, the operation mode of the bidirectional ventilation assembly can be set according to actual use requirements.

[0111] In some embodiments, the bidirectional ventilation assembly can simultaneously operate in the fresh air mode and the exhaust mode, that is, the fresh air duct V01 and the exhaust air duct V02 can be opened at the same time. While the dirty air flow in the indoor space flows to the outdoor space, fresh air flow from the outdoor space can also enter the indoor space. Through the combination of the in-out air flow driving assembly, the improvement efficiency of the indoor space air flow is increased, so as to timely meet the user's demand when the user urgently needs to discharge or update the indoor air.

[0112] Moreover, while the indoor air is discharged to the outdoor space, fresh outdoor air is supplemented to the indoor space, the indoor air volume is kept sufficient, and the indoor air is more easily sucked. For example, when there is a leakage of irritating gas (such as gas released by home decoration materials), coal gas, or other gas in the indoor space, the bidirectional ventilation assembly can be set to simultaneously operate in the fresh air mode and the exhaust mode to achieve rapid ventilation. Compared with the conventional fresh air structure that simply introduces fresh air, the bidirectional ventilation assembly in some embodiments has a larger purification flow per unit time, a higher ventilation efficiency, and a better purification effect.

[0113] Moreover, when the air conditioner 10000 is a wall-mounted air conditioner, the bidirectional ventilation assembly can avoid the situation that the indoor temperature changes sharply due to too fast ventilation when the window is directly opened, thereby avoiding causing discomfort of the indoor personnel due to the sharp increase or decrease of the temperature. Moreover, the main body 1000 is located at a higher position, and the ventilation position will not cause discomfort due to being too close to the people.

[0114] In some embodiments, the bidirectional ventilation assembly can realize the operation of the fresh air mode and the exhaust mode by means of a valve, that is, when the bidirectional ventilation assembly is started in the fresh air mode, the exhaust mode is stopped, at this time, only the fresh air duct V01 is ventilated, and the exhaust air duct V02 is not ventilated. Or when the bidirectional ventilation assembly is started in the exhaust mode, the fresh air mode is stopped, at this time, the fresh air duct V01 is not ventilated, and the exhaust air duct V02 is ventilated.

[0115] Understandably, when the air conditioner 10000 is in cooling mode, the two-way ventilation component draws in fresh air from the outside to the inside, and the cooling capacity generated by the air conditioner 10000 can still remain indoors, resulting in minimal cooling loss. Exhausting indoor air to the outside through the exhaust duct V02, and setting the exhaust airflow to be less than the fresh airflow, can further reduce cooling loss.

[0116] The bidirectional ventilation component is located at one end of the length of the heat exchange fan 41. Compared to the main body without the bidirectional ventilation component, it only increases the lateral length. The height and thickness of the main body 1000 can remain largely unchanged or only slightly different, making the main body 1000 thin and light. When hung on the wall, it will not be too obtrusive and will not affect the layout of the indoor space. It will also not be too heavy and will not make it difficult to fix the air conditioner 10000, reducing the risk of it falling off the wall. The air conditioner 10000 as a whole remains a thin and light model, which is not only aesthetically pleasing when hung on the wall, but also keeps the weight under control.

[0117] Reference Figure 5 , Figure 6 The air conditioner 10000 also includes a drive shaft 43, which is detachably connected to the heat exchange fan 41, and the exhaust fan 7 and the fresh air fan 6 are mounted on the drive shaft 43.

[0118] In other words, the heat exchange fan 41, exhaust fan 7, and fresh air fan 6 are separate components, which can be manufactured independently and then assembled onto the common motor 42. This eliminates the need for the heat exchange fan 41, exhaust fan 7, and fresh air fan 6 to be molded as a single unit, reducing manufacturing complexity. Furthermore, the quality is easier to ensure when each fan is manufactured independently, and it is also easier to ensure the overall dynamic balance.

[0119] By setting a drive shaft 43, which is detachably connected to the heat exchange fan 41, and the exhaust fan 7 and the fresh air fan 6 are installed on the drive shaft 43, the exhaust fan 7 and the fresh air fan 6 do not need to be removed when maintaining the heat exchange fan 41, and the heat exchange fan 41 does not need to be removed when maintaining the exhaust fan 7 and the fresh air fan 6. This makes it convenient for disassembly and maintenance in the future.

[0120] According to the air conditioner 10000 of this application embodiment, the heat exchange fan 41, exhaust fan 7, and fresh air fan 6 share the same motor, which can reduce the overall size, reduce the number of motors, and save costs. The heat exchange fan 41, exhaust fan 7, and fresh air fan 6 are driven by the same motor, enabling them to rotate and stop simultaneously at the same speed. In related technologies, the fresh air fan and exhaust fan are driven by separate motors, resulting in high costs. The method of one motor driving three fans in this application saves two motors, significantly reducing costs. Furthermore, by setting the drive shaft 43, the heat exchange fan 41 can be separated from the exhaust fan 7 and fresh air fan 6 for easy maintenance.

[0121] In the scheme of the present application, the exhaust fan 7 and the fresh air fan 6 can be an integral piece, and the exhaust fan 7 and the fresh air fan 6 can also be independently processed, and then synchronously rotate by being installed on the transmission shaft 43. The rotating shafts of the exhaust fan 7 and the fresh air fan 6 are the transmission shaft 43, the number of shaft connecting parts on the exhaust fan 7 and the fresh air fan 6 is small, and the transmission shaft 43 has high reliability in transmitting torque to the exhaust fan 7 and the fresh air fan 6.

[0122] Further, the transmission shaft 43 can be formed as an integral piece with at least one of the exhaust fan 7 and the fresh air fan 6, and the transmission shaft 43 can also be a mutually independent processing piece with the exhaust fan 7 and the fresh air fan 6.

[0123] For example, the transmission shaft 43 is formed as an integral piece with the exhaust fan 7, and the fresh air fan 6 is sleeved on the transmission shaft 43. The transmission shaft 43 and the exhaust fan 7 can be fixed by welding, or can be an integral injection molding piece.

[0124] For another example, the transmission shaft 43 is formed as an integral piece with the fresh air fan 6, and the exhaust fan 7 is sleeved on the transmission shaft 43. The transmission shaft 43 and the fresh air fan 6 can be fixed by welding, or can be an integral injection molding piece.

[0125] In some embodiments, as shown in Figure 5 , Figure 6 The heat exchange fan 41 is provided with a rotating shaft 415 at one end, and the transmission shaft 43 is detachably connected to the rotating shaft 415. In this way, the connection structure between the transmission shaft 43 and the heat exchange fan 41 can be designed to be relatively small in size, without occupying too much space, thereby avoiding occupying the air flow channel. Moreover, after the size is reduced, the connection structure does not need to be designed to be too long, so that the length of the main body 1000 does not need to be designed to be too long. In addition, the heat exchange fan 41 uses the rotating shaft 415 to connect the transmission shaft 43, and the power is only transmitted from the shaft, so that the peripheral structure of the heat exchange fan 41 is not affected, thereby avoiding interference with the rotation of the heat exchange fan 41.

[0126] Optionally, the rotating shaft 415 is integrally formed on the heat exchange fan 41, and the rotating shaft 415 and the main body structure of the heat exchange fan 41 can be fixed by welding, or can be an integral injection molding piece, so as to prevent relative rotation.

[0127] Specifically, as shown in Figure 6 One of the transmission shaft 43 and the rotating shaft 415 is provided with a plug-in barrel 431 at the end, and the other is provided with a plug-in column 4151 located in the plug-in barrel 431.

[0128] Specifically, the end of the rotating shaft 415 away from the common motor 42 is provided with a plug-in barrel 431, and the end of the transmission shaft 43 towards the common motor 42 is provided with a plug-in column 4151, which is inserted into the plug-in barrel 431. Alternatively, the end of the rotating shaft 415 away from the common motor 42 is provided with a plug-in column 4151, and the end of the transmission shaft 43 towards the common motor 42 is provided with a plug-in barrel 431, which is inserted into the plug-in column 4151.

[0129] The transmission shaft 43 and the rotating shaft 415 are connected through plug-in fitting, which not only ensures sufficient contact area and improves the torque transmission capacity of the connection and reduces the possibility of torsional fracture, but also improves the assembly convenience. That is, when the machine is disassembled, the plug-in column 4151 can be moved away from the plug-in barrel 431 to disengage, which is very convenient for disassembly and assembly.

[0130] Further, the barrel cavity of the plug-in barrel 431 is a non-cylindrical cavity, and the plug-in column 4151 is a non-cylindrical column. It can be understood that the plug-in column 4151 needs to transmit torque when it is located in the plug-in barrel 431. By using the non-cylindrical shape of the plug-in column 4151, the torque can be dispersed to each corner of the outer periphery of the plug-in column 4151, without relying solely on friction to transmit torque, which can avoid slipping and make torque transmission more reliable.

[0131] In addition, the asymmetric shape of the non-circular shaft changes the natural frequency and mode of the shaft. During torque transmission, when the external excitation frequency approaches the natural frequency of the shaft, the shaft will resonate, causing severe vibration and possible damage. Due to the complexity of the shape of the non-circular shaft, its natural frequency is different from that of a circular shaft of the same size, and the mode of vibration in different directions is also more complex. This makes it less likely for the non-circular shaft to resonate when subjected to torque fluctuations.

[0132] In some embodiments, as shown in Figure 6 The barrel wall of the plug-in barrel 431 is provided with a first positioning hole 4312, and the air conditioner 10000 further comprises a first fastener fitted in the first positioning hole 4312, and the end of the first fastener is connected to the plug-in column 4151. In this way, after the plug-in column 4151 is inserted into the plug-in barrel 431, the fastening of the first fastener can prevent the plug-in column 4151 from being easily loosened from the plug-in barrel 431, improving the reliability of the assembly.

[0133] Specifically, the outer periphery of the plug-in column 4151 includes a connected circular arc surface and a flat surface, and the barrel wall of the plug-in barrel 431 has a shape consistent with the shape of the outer periphery of the plug-in column 4151. The first positioning hole 4312 is provided at the flat surface of the barrel wall of the plug-in barrel 431 corresponding to the outer periphery of the plug-in column 4151, which facilitates the machining of the hole.

[0134] In some embodiments, as shown in Figure 5 and Figure 6As shown, the depth of the plug post 4151 within the plug cylinder 431 is n1. The volute assembly includes a partition wall 1207 located between the fresh air duct V01 and the exhaust air duct V02. The distance between the centrifugal fan adjacent to the plug cylinder 431 and the partition wall 1207 is n2, where n2 is greater than or equal to n1.

[0135] When it is necessary to remove the fresh air fan 6 or the exhaust fan 7, the first fastener can be loosened, and then the drive shaft 43 can be moved a distance n1 away from the heat exchange fan 41 to disengage the drive shaft 43 from the heat exchange fan 41. In other words, the drive shaft 43 can be disengaged from the heat exchange fan 41 while the fresh air fan 6 and the exhaust fan 7 are still inside the volute assembly, thus further facilitating disassembly.

[0136] Of course, after disengaging the drive shaft 43 from the heat exchange fan 41, it is still necessary to disassemble the volute assembly to remove the fresh air fan 6 or the exhaust fan 7, but not the entire volute assembly. Therefore, this structure still facilitates disassembly, making it convenient to disassemble the heat exchange fan 41 or the centrifugal fan separately during after-sales maintenance, thus improving maintenance efficiency.

[0137] In some embodiments of this application, reference is made to Figure 4 , Figure 5 As shown, the common motor 42 includes an output shaft 421, and a heat exchange fan 41 is fixedly connected to the output shaft 421. When the output shaft 421 rotates, it drives the heat exchange fan 41 to rotate. The output shaft 421 and the transmission shaft 43 are arranged coaxially.

[0138] In some embodiments, the air conditioner 10000 further includes a first bearing housing 131 and a first bearing 132. The first bearing housing 131 is disposed on the base 3, and the first bearing 132 is disposed within the first bearing housing 131 and is used to support the heat exchange fan 41.

[0139] The common motor 42, heat exchange fan 41, drive shaft 43, exhaust fan 7 and fresh air fan 6 constitute a one-shaft three-fan structure. By setting the first bearing 132, it is beneficial to improve the stability of the one-shaft three-fan structure and reduce the amount of runout of the one-shaft three-fan structure.

[0140] Specifically, such as Figure 5 and Figure 6 As shown, one end of the heat exchange fan 41 is provided with a rotating shaft 415, which is fitted onto the first bearing 132. The drive shaft 43 is detachably connected to the rotating shaft 415, and the connection point is located on the side of the first bearing 132 away from the heat exchange fan 41. With this configuration, when disassembling the centrifugal fan, it is not necessary to remove the first bearing housing 131 and the first bearing 132, which further facilitates the disassembly and maintenance of the exhaust fan 7 and the fresh air fan 6.

[0141] Specifically, the first bearing housing 131 is snap-fitted onto the base 3.

[0142] In some embodiments, such as Figure 6 As shown, the drive shaft 43 includes at least three shaft segments distributed along its length, with a step formed between each pair of adjacent shaft segments. Two centrifugal fans are mounted on two shaft segments of the drive shaft 43, with each centrifugal fan abutting against a step. In this way, the steps are used to axially limit the centrifugal fans, which is convenient and can avoid interference with assembly and operation of the centrifugal fans.

[0143] In some specific embodiments, such as Figure 6 As shown, the drive shaft 43 has at least three shaft segments, including a first shaft segment 433, a second shaft segment 434, and a third shaft segment 435.

[0144] The first shaft segment 433 is detachably connected to the heat exchange fan 41. The second shaft segment 434 is connected to the end of the first shaft segment 433 furthest from the heat exchange fan 41. The circumference of the second shaft segment 434 is smaller than that of the first shaft segment 433, forming a first step 437 between the two shaft segments. A centrifugal fan is fitted onto the second shaft segment 434 and abuts against the first step 437. The third shaft segment 435 is connected to the end of the second shaft segment 434 furthest from the heat exchange fan 41. The circumference of the third shaft segment 435 is smaller than that of the second shaft segment 434, forming a second step 438 between the two shaft segments. Another centrifugal fan is fitted onto the third shaft segment 435 and abuts against the second step 438.

[0145] In other words, the circumferences of the first shaft segment 433, the second shaft segment 434, and the third shaft segment 435 decrease sequentially. During assembly, both centrifugal fans are installed from the end with the smaller circumference, the third shaft segment 435, and then two steps are used to axially limit the two centrifugal fans. This design results in the first shaft segment 433 having the largest circumference, allowing for a detachable connection between the larger section and the heat exchange fan 41, facilitating the connection structure setup. Furthermore, the larger circumference section ensures more reliable torque transmission and reduces the risk of breakage.

[0146] Optionally, such as Figure 6 and Figure 7 As shown, a second positioning hole 708 is also provided on the hub of the centrifugal fan located in the second shaft section 434. The air conditioner 10000 also includes a second fastener that engages with the second positioning hole 708, and the end of the second fastener is connected to the second shaft section 434.

[0147] Thus, after the centrifugal fan is fitted onto the second shaft section 434, the tightening of the second fastener ensures that the centrifugal fan is not easily moved along the axial direction of the second shaft section 434, thereby improving the reliability of the assembly.

[0148] Specifically, the outer peripheral surface of the second shaft segment 434 includes a connected arc surface and a plane, and the shape of the inner peripheral surface of the centrifugal fan hub is consistent with the shape of the outer peripheral surface of the second shaft segment 434. The second positioning hole 708 is provided at the plane of the outer peripheral surface of the second shaft segment 434 and the inner peripheral surface of the hub, which facilitates the machining of the hole.

[0149] Furthermore, both the second shaft segment 434 and the third shaft segment 435 are non-cylindrical, and the central holes of the two centrifugal fans are also non-circular, with shapes consistent with the outlines of the second shaft segment 434 and the third shaft segment 435, respectively.

[0150] Understandably, the two shaft segments of the drive shaft 43 are inserted into the two centrifugal fans and need to transmit torque. By utilizing the non-cylindrical shape of the two shaft segments, the torque can be distributed to the corners of the outer periphery of each shaft segment. It is not necessary to rely solely on friction to transmit torque, which can avoid slippage and make torque transmission more reliable.

[0151] In some specific embodiments, such as Figure 6 As shown, the drive shaft 43 includes at least three shaft segments, including a fourth shaft segment 436, which has threads. The air conditioner 10000 also includes a locking nut 134, which engages with the fourth shaft segment 436 and abuts against an adjacent centrifugal fan. This allows the centrifugal fan to be locked from the end, restricting its axial movement and facilitating disassembly and assembly.

[0152] In some embodiments, such as Figures 5-6 As shown, the exhaust fan 7 is located between the fresh air fan 6 and the heat exchange fan 41. That is, the exhaust fan 7 is closer to the heat exchange fan 41 than the fresh air fan 6. When the air conditioner 10000 is cooling or heating, the heat exchange fan 41 operates to drive indoor air entering the casing 1 from the heat exchange inlet 101 through the indoor heat exchanger 2. Since the exhaust fan 7 is close to the heat exchange fan 41, and the air inlet of the exhaust fan 7 is close to the air inlet of the heat exchange fan 41, the exhaust fan 7 can draw air from the air inlet of the heat exchange fan 41. In other words, when the exhaust fan 7 rotates, it can draw indoor air drawn into the casing 1 from the heat exchange inlet 101 to the exhaust fan 7, thus eliminating the need for additional holes in the casing 1 to allow separate air intake for the exhaust fan 7. This reduces the number of openings in the casing 1, simplifies the manufacturing process of the casing 1, and increases its aesthetic appeal. In addition, the heat exchange air inlet 101 is generally set to be large, so the amount of indoor air drawn into the casing 1 through the heat exchange air inlet 101 is large, which makes the air volume reaching the exhaust fan 7 also large, thus speeding up the exhaust efficiency.

[0153] Specifically, the exhaust outlet 902 is located on the side of the volute assembly facing the heat exchange fan 41. This makes the exhaust outlet 902 convenient for operators to access when disassembling or assembling the drive shaft 43.

[0154] When there is condensate on the heat exchange fan 41 and the indoor heat exchanger 2, the condensate can be drawn into the exhaust duct V02 and then discharged from the exhaust duct V02.

[0155] Of course, this application does not exclude the possibility that in some embodiments, the fresh air fan 6 is located between the exhaust fan 7 and the heat exchange fan 41. That is, the fresh air fan 6 is closer to the heat exchange fan 41 than the exhaust fan 7. When there is condensate on one side of the indoor heat exchanger 2, the condensate is less likely to reach the fresh air fan 6, reducing the risk of water accumulation and bacterial growth at the fresh air fan 6.

[0156] In some embodiments of this application, reference is made to Figures 3-4 , Figures 7-9 As shown, the volute assembly includes a first volute half 81 and an exhaust volute half 9, with the exhaust volute half 9 located on the side of the first volute half 81 facing the common motor 42. The exhaust volute half 9 is detachably connected to the first volute half 81.

[0157] The volute assembly also includes a common volute 12, which includes a fresh air volute portion 121. The fresh air volute portion 121 is detachably connected to the first volute half 81, and the fresh air volute portion 121 and the first volute half 81 form part of a fresh air duct V01.

[0158] The common volute 12 includes: an exhaust volute portion 122, which is detachably connected to the exhaust volute half 9, and an exhaust duct V02 is formed within the exhaust volute portion 122 and the exhaust volute half 9.

[0159] In some embodiments, refer to Figures 3-4 , Figures 7-9 As shown, the fresh air volute 121 and the exhaust volute 122 can be a single piece, which reduces the number of volutes and thus reduces the assembly steps of the volute assembly. When installing the bidirectional ventilation assembly on the main body 1000, the common motor 42, heat exchange fan 41, exhaust fan 7, and fresh air fan 6 can be assembled into a motor-fan assembly first. Then, the first volute half 81 and the exhaust volute half 9 are installed on the base 3. Subsequently, the motor-fan assembly is installed on the main body 1000, so that the fresh air fan 6 is located inside the first volute half 81 and the exhaust fan 7 is located inside the exhaust volute half 9. Finally, the common volute 12 is placed over the exhaust fan 7 and the fresh air fan 6. The fresh air volute 121 is connected and fixed to the first volute half 81 with fasteners, and the exhaust volute 122 is connected and fixed to the exhaust volute half 9 with fasteners.

[0160] In other embodiments, the fresh air volute 121 and the exhaust volute 122 can be separate components. When installing the bidirectional ventilation assembly onto the main body 1000, the common motor 42, heat exchange fan 41, exhaust fan 7, and fresh air fan 6 can be assembled into a motor-fan assembly first. Then, the first volute half 81 and the exhaust volute half 9 are installed on the base. Subsequently, the motor-fan assembly is installed onto the main body 1000, such that the fresh air fan 6 is located inside the first volute half 81, and the exhaust fan 7 is located inside the exhaust volute half 9. Finally, the fresh air volute 121 is connected and fixed to the first volute half 81 with fasteners, and the exhaust volute 122 is connected and fixed to the exhaust volute half 9 with fasteners, so that the fresh air volute 121 covers the top of the fresh air fan 6, and the exhaust volute 122 covers the top of the exhaust fan 7.

[0161] Alternatively, the fastener can be a bolt, screw, etc., which can securely connect two parts.

[0162] Optionally, the fresh air volute 121 and the first volute half 81 can also be connected and fixed by a snap-fit ​​structure, and the exhaust volute 122 and the exhaust volute half 9 can also be connected and fixed by a snap-fit ​​structure.

[0163] The fresh air volute portion 121 and the first volute half 81 constitute a part of the fresh air volute. In some embodiments of this application, the exhaust volute half 9 and the exhaust volute portion 122 constitute the exhaust volute, the exhaust volute half 9 and the exhaust volute portion 122 enclose an exhaust air inlet 901, and the exhaust volute half 9 and the first volute half 81 enclose an exhaust air outlet 902.

[0164] In some embodiments, such as Figure 7 As shown, a portion of the exhaust air inlet 901 is formed on the exhaust volute half 9, and another portion is formed on the exhaust volute portion 122, with the axial direction of the exhaust air inlet 901 along the length of the heat exchange fan 41. In other words, the exhaust air inlet 901 is directly opposite the axial air intake end of the exhaust fan 7, resulting in low air resistance when the exhaust fan 7 enters through the exhaust air inlet 901, which helps ensure sufficient exhaust airflow. When exhaust airflow is relatively easy to obtain, a smaller exhaust fan 7 can be selected, further reducing the size of the bidirectional ventilation assembly.

[0165] The exhaust air inlet 901 is axially oriented towards the indoor heat exchanger 2, that is, the air inlet area of ​​the exhaust air inlet 901 is oriented towards the indoor heat exchanger 2. In this way, the exhaust air inlet 901 is close to the heat exchange air inlet 101, and the air volume at the heat exchange air inlet 101 is large. Part of the air entering the casing 1 from the heat exchange air inlet 101 can enter the exhaust air duct V02 through the exhaust air inlet 901, so that the air volume at the exhaust air inlet 901 is sufficient.

[0166] The exhaust fan 7 and the fresh air fan 6 are located on the same side of the heat exchange fan 41. The exhaust fan 7 is installed within the exhaust duct V02 formed by the exhaust volute, and the fresh air fan 6 is installed within the fresh air duct V01 formed by the fresh air volute. The volute sidewalls of adjacent positions of the exhaust fan 7 and the fresh air fan 6 can simultaneously serve as the volute sidewalls of both the exhaust fan 7 and the fresh air fan 6. For example, the plate along the vertical direction of the fresh air volute portion 121 and the first volute half 81 can serve as the volute sidewall shared by the exhaust fan 7 and the fresh air fan 6, thus saving one component and improving overall integrity.

[0167] With this type of volute assembly, when it is necessary to disassemble and assemble the fresh air fan 6 and the exhaust fan 7, the common volute 12 can be disassembled, and then the drive shaft 43 can be removed. It is not necessary to disassemble the entire volute assembly, making assembly very easy.

[0168] In some embodiments of this application, reference is made to Figures 3-4 , Figures 7-9 As shown, the volute assembly also includes a second volute 82, which is located on the side of the first volute half 81 away from the heat exchange fan 41, and the second volute 82 is detachably connected to the first volute half 81.

[0169] In some embodiments of this application, the second volute 82 includes a second volute half 821, which is located on the side of the first volute half 81 away from the heat exchange fan 41, and the second volute half 821 is detachably connected to the first volute half 81. An axial ventilation port 8211 is provided on the second volute half 821, and a volute cavity V011 is formed between the second volute half 821, the fresh air volute part 121 and the first volute half 81. The fresh air fan 6 is located in the volute cavity V011.

[0170] In some embodiments of this application, the second volute 82 further includes a fan cover 822, which is located on the side of the second volute half 821 away from the heat exchange fan 41, and the fan cover 822 is detachably connected to the second volute half 821. The cavity enclosed by the fan cover 822 and the second volute half 821 is the fresh air cavity V012.

[0171] In some embodiments of this application, a fresh air inlet 801 is formed on a fan cover 822, a first fresh air outlet 802 is formed by the second volute half 821 and the first volute half 81, and a second fresh air outlet 808 is formed by the second volute half 821 and the fresh air volute portion 121.

[0172] like Figure 7 and Figure 8As shown, the first volute half 81 has a first surrounding plate 811 surrounding the radial outer side of the fresh air fan 6, and the fresh air volute part 121 has a second surrounding plate 1211 surrounding the radial outer side of the fresh air fan 6. The first surrounding plate 811 and the second surrounding plate 1211 are connected to form a fresh air volute curve. Since the fresh air fan 6 and the heat exchange fan 41 are arranged coaxially, and the outer diameter of the fresh air fan 6 is larger than the outer diameter of the heat exchange fan 41, and since the thickness of the main body 1000 is fixed, the arrangement of the fresh air fan 6 in the fresh air volute part 121 and the first volute half 81 is skewed. The fresh air fan 6 cannot be located at the center of the fresh air volute curve, which results in a reduction in the air volume ejected from the first fresh air outlet 802. Therefore, by setting a second fresh air outlet 808 above the fresh air fan 6, the air volume ejected from the fresh air volute is increased, which makes up for the defect of reduced air volume caused by the limitation of the position of the fresh air fan 6.

[0173] When the fresh air fan 6 and the heat exchange fan 41 are coaxially arranged, the axis of the fresh air fan 6 is determined. A conventional volute curve design cannot unfold, limiting the work done by the blades of the fresh air fan 6 and significantly reducing airflow. When two fresh air outlets are designed, the space required for the volute curve to unfold is half that of a single outlet. The blades of the fresh air fan 6 can then perform all their work, blowing air out from both outlets, thus increasing the airflow.

[0174] In other words, compared to a volute assembly that only has a first fresh air outlet 802, the volute assembly of this application has both a first fresh air outlet 802 and a second fresh air outlet 808, resulting in a larger air volume.

[0175] By processing the volute assembly into at least three parts—a first volute half 81, a second volute half 821, a fan cover 822, an exhaust volute half 9, and a common volute 12—the manufacturing and assembly difficulties can be reduced. Furthermore, manufacturing such a complex housing in parts facilitates quality control. The first volute half 81 is detachably connected to the exhaust volute half 9; the second volute half 821 is detachably connected to the first volute half 81; the fan cover 822 is detachably connected to the second volute half 821; and the common volute 12 is detachably connected to both the first volute half 81 and the exhaust volute half 9. This facilitates assembly and subsequent adjustments and maintenance.

[0176] It is understandable that the two parts can be detachably connected, which can be achieved through fasteners or snap-fit ​​structures.

[0177] In some embodiments, the exhaust fan 7 may be a plastic component, thus being lightweight and low-cost. In some embodiments, the exhaust fan 7 may also be a resin component, a metal component, or the like.

[0178] In some embodiments, the fresh air fan 6 may be made of plastic, thus being lightweight and low-cost. In some embodiments, the fresh air fan 6 may also be made of resin, metal, or the like.

[0179] Similarly, the exhaust volute half 9 can be made of plastic, thus being lightweight and low-cost. For example, the exhaust volute half 9 can be an injection-molded part. In some embodiments, the exhaust volute half 9 can also be made of resin, metal, etc.

[0180] The first volute half 81 can be made of plastic, thus being lightweight and low-cost. For example, the first volute half 81 can be an injection-molded part. In some embodiments, the first volute half 81 can also be a resin part, a metal part, etc.

[0181] The common volute 12 can be made of plastic, thus being lightweight and low-cost. For example, the common volute 12 can be an injection-molded part. In some embodiments, the common volute 12 can also be made of resin, metal, etc.

[0182] The second volute 82 can be made of plastic, thus being lightweight and low-cost. For example, the second volute 82 can be an injection-molded part. In some embodiments, the second volute 82 can also be a resin part, a metal part, etc.

[0183] In some embodiments of this application, reference is made to Figures 2-5 , Figures 7-9 The air conditioner 10000 also includes a purification component 11, which is installed in the fresh air duct V01 and is used to purify the fresh air blown into the room and improve the cleanliness of the indoor air.

[0184] For example, the purification component 11 is installed inside the fresh air cavity V012, and the purification component 11 is located at the axial air inlet end of the fresh air fan 6. The purification component 11 is connected to the second volute 82, which facilitates the assembly of the purification component 11 and prevents it from interfering with the fresh air fan 6. The rotation of the fresh air fan 6 allows outdoor air to enter the fresh air cavity V012 from the fresh air inlet 801, and allows the outdoor air entering the fresh air cavity V012 to be blown through the purification component 11, then into the volute cavity V011, and into the room from the fresh air outlet.

[0185] In this way, the fresh airflow can blow almost vertically over the purification component 11, further reducing the consumption of fresh air intake and thus increasing the fresh air volume. Moreover, when the indoor heat exchanger 2 is in cooling mode, causing condensation to form in the fresh air, the condensation can remain on the purification component 11 as the air flows through it, further preventing water from being blown out when the fresh air device is venting.

[0186] In some embodiments, the fresh air outlet includes a first fresh air outlet 802 and a second fresh air outlet 808, both of which are connected to the fresh air duct V01. Thus, outdoor air entering the volute cavity V011 enters the room through the first fresh air outlet 802 and the second fresh air outlet 808.

[0187] In some embodiments of this application, such as Figure 5 As shown, the purification component 11 includes a filter screen, which covers the axial vent 8211. The filter screen covers the entire air intake end of the fresh air fan 6, providing a large coverage area and excellent filtration efficiency. The filter screen design helps ensure sufficient contact area with the flowing air, while also being lightweight and producing low noise. For example, the filter screen may be made of HEPA mesh, thus possessing strong adsorption capacity and excellent dust filtration effect.

[0188] In some embodiments of this application, the filter screen is plate-shaped, so that the filter screen is thin overall and will not occupy too much thickness when placed in the two-way ventilation assembly.

[0189] In some embodiments of this application, the filter screen is square, which facilitates the positioning and installation of the filter screen.

[0190] In some embodiments of this application, the filter screen is a square mesh, with its side length greater than the diameter of the axial vent 8211. The square mesh is easy to position during fixing, does not easily shake after fixing, and is easy to process with minimal processing waste. By making the side length of the filter screen greater than the diameter of the axial vent 8211, all fresh air entering the axial vent 8211 can flow through the filter screen, resulting in high filtration cleanliness.

[0191] In some embodiments of this application, combined with Figure 5 As shown, the fan cover 822 is also provided with an installation port 803, through which the purification component 11 can be detachably installed into the fresh air chamber V012. This facilitates the removal of the purification component 11 when it is damaged or saturated, making it convenient for maintenance or replacement.

[0192] In some embodiments of this application, combined with Figure 3 As shown, in the front-rear direction of the main body 1000, the mounting port 803 is located on the front side of the main body 1000. When the purification component 11 is disassembled, it can be free from interference from the pipes connected to the fresh air inlet 801 and the exhaust outlet 902, which facilitates disassembly. For example, the front side of the housing 1 is provided with an openable panel 15. When the panel 15 is opened or rotated upward, the mounting port 803 can be exposed, which facilitates the disassembly of the purification component 11.

[0193] It is also possible that in some designs, the mounting port 803 will be located at the bottom of the main body 1000.

[0194] In some embodiments of this application, such as Figure 8 As shown, a purification air inlet 804 for connecting to the indoor environment is formed on the second volute 82. The rotation of the fresh air fan 6 allows indoor air to enter the fresh air chamber V012 through the purification air inlet 804 for purification by the purification component 11. It also allows the indoor air entering the fresh air chamber V012 to pass through the purification component 11, then enter the volute chamber V011, and finally enter the indoor environment through the fresh air outlet. This allows indoor air to enter the fresh air duct V01 from the purification air inlet 804, undergo purification, and then enter the indoor environment through the fresh air outlet.

[0195] This design allows for air circulation and purification when indoor air is polluted. This eliminates the need to introduce fresh outdoor air, thus improving air quality. Because no fresh outdoor air is introduced, the purification process avoids sudden drafts of unheated cold or hot outdoor air, preventing discomfort caused by rapid temperature changes.

[0196] In some embodiments of this application, the purification air inlet 804 can be connected to the heat exchange air inlet 101. There is no need for a physical pipe to connect the purification air inlet 804 and the heat exchange air inlet 101, which reduces the number of parts, reduces the volume occupied, and facilitates layout.

[0197] In some embodiments of this application, such as Figure 8 As shown, the purification air inlet 804 is located at the bottom of the second volute 82 and faces downwards. It can be understood that the fresh air inlet 801 is located below the main body 1000, and both the fresh air inlet 801 and the purification air inlet 804 are located at the bottom of the fresh air volute and extend downwards, facilitating processing and shaping. Furthermore, in use, only one of them needs to be opened. Placing both the fresh air inlet 801 and the purification air inlet 804 at the bottom of the fresh air volute allows for centralized switching to select one inlet to open, reducing the number of switches required.

[0198] In some embodiments, combined with Figure 8 As shown, the air intake direction of the purification air inlet 804 is perpendicular to the length direction of the heat exchange fan 41. It can be understood that aligning the air intake direction of the purification air inlet 804 with the length direction of the heat exchange fan 41 keeps the air intake area of ​​the purification air inlet 804 further away from the exhaust air inlet 901, preventing excessive energy consumption due to their proximity. Furthermore, the different directions of the purification air inlet 804 and the exhaust air inlet 901 help expand the negative pressure area, facilitating the inflow of a large amount of indoor air into the negative pressure area and ensuring sufficient exhaust and fresh air volume.

[0199] In some embodiments of this application, such as Figure 1As shown, the air conditioner 10000 also includes a panel 15, one end of which is pivotally connected to the housing 1, for example, the upper end of the panel 15 is pivotally connected to the housing 1. The panel 15 is rotatable relative to the housing 1. When the panel 15 is rotated to the open position, the air purification component 11 is exposed, and the user can remove the filter screen in the air purification component 11. When the panel 15 is rotated to the closed position, the air purification component 11 is covered. At this time, the panel 15 is an exterior component, and the appearance of the air conditioner 10000 is relatively neat.

[0200] In some embodiments of this application, such as Figure 1 As shown, the air conditioner 10000 also includes a baffle plate 16, the left and right ends of which are pivotally connected to the housing 1. The baffle plate 16 is rotatable relative to the housing 1. When the baffle plate 16 is rotated to the open position, the heat exchange air outlet 102 is exposed, facilitating airflow from the heat exchange air outlet 102. When the baffle plate 16 is rotated to the closed position, the heat exchange air outlet 102 is blocked, preventing debris, flying insects, etc., from entering the air conditioner 10000 when the air conditioner 10000 is not in operation.

[0201] Other components of the air conditioner 1000 according to the embodiments of the present utility model, such as the controller, are known in their structure and principle to those skilled in the art and will not be described in detail here.

[0202] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0203] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner (10000) comprising: a main body (1000) comprising: a casing (1) having an accommodating cavity (V1) formed inside, and a heat exchange air inlet (101) and a heat exchange air outlet (102) formed on the casing (1); a base (3) provided in the accommodating cavity (V1) and having a volute tongue air duct (V03) formed thereon; a heat exchange fan (41) provided in the volute tongue air duct (V03); characterized in that it further comprises: a common motor (42) provided in the accommodating cavity (V1) and located at one end of the heat exchange fan (41) in the length direction; a fresh air fan (6) which is an axial air inlet and radial air outlet centrifugal fan, and is located at the other end of the heat exchange fan (41) in the length direction; an exhaust air fan (7) which is an axial air inlet and radial air outlet centrifugal fan; wherein the exhaust air fan (7) and the fresh air fan (6) are located at the same end of the heat exchange fan (41), and the common motor (42) drives the heat exchange fan (41), the exhaust air fan (7) and the fresh air fan (6) to rotate synchronously in the working state; a volute assembly having a fresh air duct (V01) and an exhaust air duct (V02) formed therein, and a fresh air inlet (801), a fresh air outlet, an exhaust air inlet (901) and an exhaust air outlet (902) formed thereon, the fresh air inlet (801) and the fresh air outlet being in communication with the fresh air duct (V01), and the exhaust air inlet (901) and the exhaust air outlet (902) being in communication with the exhaust air duct (V02); the fresh air fan (6) is provided in the fresh air duct (V01), and rotation of the fresh air fan (6) can make outdoor air enter the fresh air duct (V01) from the fresh air inlet (801) and enter indoor air from the fresh air outlet; the exhaust air fan (7) is provided in the exhaust air duct (V02), and rotation of the exhaust air fan (7) can make indoor air enter the exhaust air duct (V02) from the exhaust air inlet (901) and be exhausted to outdoor air from the exhaust air outlet (902); a transmission shaft (43) which is detachably connected with the heat exchange fan (41), and the exhaust air fan (7) and the fresh air fan (6) are mounted and connected on the transmission shaft (43).

2. The air conditioner (10000) according to claim 1, characterized by, One end of the heat exchange fan (41) is provided with a rotating shaft (415), and the transmission shaft (43) is detachably connected with the rotating shaft (415).

3. The air conditioner (10000) according to claim 2, characterized by, One end of the transmission shaft (43) and the rotating shaft (415) is provided with a plug-in cylinder (431), and the other end is provided with a plug-in column (4151). The barrel cavity of the plug-in barrel (431) is a non-cylindrical cavity, and the plug-in column (4151) is a non-cylinder, which is located in the plug-in barrel (431).

4. The air conditioner (10000) according to claim 3, characterized by, The depth of the plug-in column (4151) in the plug-in barrel (431) is n1; The volute assembly comprises a partition wall (1207) located between the fresh air duct (V01) and the exhaust air duct (V02); The distance between the centrifugal fan adjacent to the plug-in barrel (431) and the partition wall (1207) is n2, and n2 is greater than or equal to n1.

5. The air conditioner (10000) according to claim 3, characterized by, A first positioning hole (4312) is arranged on the barrel wall of the plug-in barrel (431), and the air conditioner (10000) further comprises: A first fastener is fitted in the first positioning hole (4312), and the end of the first fastener is connected to the plug-in column (4151).

6. The air conditioner (10000) according to claim 1, characterized by, Further comprising: A first bearing seat (131) is arranged on the base (3); A first bearing (132) is arranged in the first bearing seat (131) and used for supporting the heat exchange fan (41).

7. The air conditioner (10000) according to claim 6, characterized by, One end of the heat exchange fan (41) is provided with a rotating shaft (415), the rotating shaft (415) is fitted in the first bearing (132), the transmission shaft (43) is detachably connected with the rotating shaft (415), and the connection position is located on the side of the first bearing (132) away from the heat exchange fan (41).

8. The air conditioner (10000) according to claim 1, characterized by, The transmission shaft (43) comprises at least three shaft segments distributed along the length direction, and each adjacent two shaft segments form a step. Two centrifugal fans are assembled on two shaft segments of the transmission shaft (43), and each centrifugal fan abuts against a step.

9. The air conditioner (10000) according to claim 8, wherein The at least three shaft segments of the transmission shaft (43) comprise: A first shaft segment (433) is detachably connected with the heat exchange fan (41); A second shaft segment (434) is connected at the end of the first shaft segment (433) away from the heat exchange fan (41), the circumference of the second shaft segment (434) is smaller than that of the first shaft segment (433), a first step (437) is formed between the second shaft segment (434) and the first shaft segment (433), one centrifugal fan is sleeved on the second shaft segment (434) and abuts against the first step (437); A third shaft segment (435) is connected at the end of the second shaft segment (434) away from the heat exchange fan (41), the circumference of the third shaft segment (435) is smaller than that of the second shaft segment (434), a second step (438) is formed between the third shaft segment (435) and the second shaft segment (434), another centrifugal fan is sleeved on the third shaft segment (435) and abuts against the second step (438).

10. The air conditioner (10000) according to claim 9, characterized in that, at least three of the shaft sections of the transmission shaft (43) further comprise: a fourth shaft section (436) provided with threads; the air conditioner (10000) further comprises a lock nut (134) fitted on the fourth shaft section (436) and abutting against the adjacent centrifugal fan.

11. The air conditioner (10000) according to claim 9, characterized by, the second shaft section (434) and the third shaft section (435) are both non-cylindrical.

12. The air conditioner (10000) according to claim 9, characterized by, a second positioning hole (708) is further provided on the hub of the centrifugal fan of the second shaft section (434), and the air conditioner (10000) further comprises: a second fastener fitted in the second positioning hole (708), and the end of the second fastener is connected to the second shaft section (434).

13. The air conditioner (10000) according to any one of claims 1-12, characterized in that, the exhaust fan (7) is located between the fresh air fan (6) and the heat exchange fan (41), and the exhaust air outlet (902) is located on the side of the volute assembly facing the heat exchange fan (41).

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