Heat exchange device

Abstract

The utility model relates to the technical field of air conditioning, and discloses a heat exchange device. The heat exchange device comprises a shell, a heat exchange core body, a fresh air fan, an air return fan and a fresh air filter part, the fresh air duct comprises a first air inlet cavity, the air return duct comprises a second air inlet cavity, the first air inlet cavity and the second air inlet cavity are located on one side of the heat exchange core body in the length direction, and the fresh air filter part is arranged in the first air inlet cavity; the first air inlet cavity is provided with a first air inlet side air duct wall which is opposite to the fresh air filtering piece in the second direction, and at least part of the first air inlet cavity is gradually close to the fresh air filtering piece in the direction away from the fresh air inlet in the first direction. According to the heat exchange device, air entering the first air inlet cavity from the fresh air inlet can flow to the whole section, extending in the first direction, of the fresh air filter part in the manner of being attached to the surface of the first air inlet side air duct wall, airflow separation is reduced, the air field uniformity of the surfaces of the fresh air filter part and the heat exchange core body is improved, airflow resistance is reduced, and the heat exchange efficiency is improved. And the working noise of the whole machine is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of air conditioning technology, in particular to a heat exchange device. BACKGROUND

[0002] The heat exchange device can improve indoor air, meet the needs of ventilation and purification. It can pass the fresh air in the room into the room after purification treatment, or can pass the dirty air in the room to the outdoor, thereby realizing air exchange to meet the daily needs of users.

[0003] In the related art, the fan driving air flow produces noise in the air duct during operation, which seriously affects the user experience. Therefore, there is room for improvement. CONTENT OF THE UTILITY MODEL

[0004] The present disclosure aims to at least solve one of the technical problems existing in the related art. To this end, some embodiments of the present disclosure propose a heat exchange device which can reduce airflow separation, improve the uniformity of the air field on the surface of the fresh air filter and the heat exchange core, reduce airflow resistance, and thus reduce the working noise of the whole machine.

[0005] The heat exchange device according to the embodiments of the present disclosure comprises: a shell, the shell has a fresh air duct and a return air duct inside, the shell is provided with a fresh air inlet, a fresh air outlet, a return air inlet and an exhaust outlet, the fresh air duct is communicated with the fresh air inlet and the fresh air outlet, and the return air duct is communicated with the return air inlet and the exhaust outlet; a heat exchange core, the heat exchange core is arranged in the shell, and air flowing through the fresh air duct and the return air duct is subjected to heat exchange in the heat exchange core; a fresh air fan, the fresh air fan is rotatably arranged in the fresh air duct and located between the heat exchange core and the fresh air outlet in the air flow direction; a return air fan, the return air fan is rotatably arranged in the return air duct and located between the heat exchange core and the exhaust outlet in the air flow direction.

[0006] The fresh air duct comprises a first air inlet cavity and a first air outlet cavity, the return air duct comprises a second air inlet cavity and a second air outlet cavity, the heat exchange core is located between the first air inlet cavity and the first air outlet cavity, and between the second air inlet cavity and the second air outlet cavity; the length direction of the heat exchange core extends along a first direction, the first air inlet cavity and the second air inlet cavity are located on one side of the length direction of the heat exchange core, the first air outlet cavity and the second air outlet cavity are located on the other side of the length direction of the heat exchange core and arranged in the length direction of the heat exchange core, the fresh air fan is arranged in the first air outlet cavity, and the return air fan is arranged in the second air outlet cavity; the heat exchange device further comprises: a fresh air filter, the fresh air filter is arranged in the first air inlet cavity.

[0007] The first air inlet cavity has a first air inlet side air duct wall, which is located upstream of the fresh air filter in the air flow direction and is arranged opposite to the fresh air filter in a second direction perpendicular to the first direction; the first air inlet side air duct wall gradually approaches the fresh air filter in the first direction away from the fresh air inlet.

[0008] According to the heat exchange device provided in the embodiments of the present disclosure, the cross-sectional area of the first air inlet cavity perpendicular to the first direction gradually decreases in the first direction away from the fresh air inlet, so that the air entering the first air inlet cavity from the fresh air inlet can flow along the surface of the first air inlet side air duct wall and flow to the entire section of the fresh air filter extending in the first direction under the guidance of the first air inlet side air duct wall, thereby reducing airflow separation, improving the uniformity of the air field on the surface of the fresh air filter and the heat exchange core, reducing airflow resistance, and further reducing the working noise of the entire machine.

[0009] In some embodiments, the distance between the end of the first air inlet side air duct wall close to the fresh air inlet and the fresh air filter in the second direction is X, and the distance between the end of the first air inlet side air duct wall away from the fresh air inlet and the fresh air filter in the second direction is Y, X / Y is 4.5-7; and / or, the distance between the end of the first air inlet side air duct wall close to the fresh air inlet and the fresh air filter in the second direction is greater than or equal to 15 mm.

[0010] In some embodiments, the first air inlet cavity further has a second air inlet side air duct wall, which is located between the fresh air filter and the first air inlet side air duct wall in the second direction; at least a portion of the second air inlet side air duct wall gradually approaches the middle position of the first air inlet cavity in a third direction in the first direction away from the fresh air inlet, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0011] In some embodiments, the second air inlet side air duct wall includes a first part and a second part, and the first part is located between the fresh air inlet and the second part in the first direction; the first part gradually approaches the middle position of the first air inlet cavity in the third direction in the first direction away from the fresh air inlet, and the second part extends in the first direction.

[0012] In some embodiments, the first portion has an inclination angle with respect to a plane determined by the first direction and the second direction, which is less than 0° and less than 30°, or equal to 30°.

[0013] In some embodiments, the first portion has a length in the first direction L1, and the second air inlet side duct wall has a length in the first direction L, and L1 / L is 0.4-0.6.

[0014] In some embodiments, the first air inlet side duct wall and the second air inlet side duct wall are connected, and the first air inlet cavity and the second air inlet cavity are at least partially separated by the first air inlet side duct wall and the second air inlet side duct wall.

[0015] In some embodiments, the first air inlet cavity further has a third air inlet side duct wall extending along the first direction and connected to a side of the second air inlet side duct wall away from the first air inlet side duct wall, wherein the third air inlet side duct wall is provided with a first positioning rib and a second positioning rib arranged at intervals in the second direction, and the fresh air filter element is located between the first positioning rib and the second positioning rib.

[0016] In some embodiments, the peripheral wall of the heat exchange core has a first air inlet face, a first air outlet face, a second air inlet face, and a second air outlet face extending along the first direction, the first air inlet face and the second air outlet face are opposite and angularly arranged in the second direction, the first air inlet face and the second air inlet face are opposite and angularly arranged in the third direction, the first air outlet face and the second air inlet face are opposite and angularly arranged in the second direction, and the first air outlet face and the second air outlet face are opposite and angularly arranged in the third direction, the first direction, the second direction, and the third direction are perpendicular to each other in pairs, the first air inlet cavity is located between the fresh air inlet and the first air inlet face, the first air outlet cavity is located between the fresh air outlet and the first air outlet face, the return air duct includes a second air inlet cavity and a second air outlet cavity, the second air inlet cavity is located between the return air inlet and the second air inlet face, and the second air outlet cavity is located between the exhaust air outlet and the second air outlet face.

[0017] In some embodiments, the first air outlet cavity includes a fresh air fan accommodating cavity and a first heat exchange cavity arranged in the second direction, and the second air outlet cavity includes a return air fan accommodating cavity and a second heat exchange cavity arranged in the second direction, wherein the fresh air fan accommodating cavity and the return air fan accommodating cavity are arranged in the first direction, and in the second direction, the first heat exchange cavity is located between the first air outlet face and the fresh air fan accommodating cavity, and the second heat exchange cavity is located between the second air outlet face and the return air fan accommodating cavity.

[0018] In some embodiments, the rotation axis of the fresh air fan and the rotation axis of the return air fan are parallel to each other and both extend along the second direction.

[0019] In some embodiments, the first air outlet cavity has a first air outlet side duct wall extending along the first direction, and in the second direction, the first air outlet side duct wall is disposed opposite to the first air outlet surface and is located between the first heat exchange cavity and the return air fan accommodating cavity; wherein, at least part of the first air outlet side duct wall is bent along the first direction toward the direction close to the fresh air fan accommodating cavity, for guiding air in the first heat exchange cavity to flow into the fresh air fan accommodating cavity; and / or, at least part of the first air outlet side duct wall is bent along the third direction toward the direction close to the second air outlet surface, for guiding air in the second heat exchange cavity to flow into the return air fan accommodating cavity.

[0020] And / or, the second air outlet cavity has a second air outlet side duct wall extending along the first direction, wherein, in the second direction, the second air outlet side duct wall is disposed opposite to the second air outlet surface and is located between the second heat exchange cavity and the fresh air fan receiving cavity; wherein, at least part of the second air outlet side duct wall is bent along the first direction toward the direction close to the return air fan receiving cavity, for guiding air in the second heat exchange cavity to flow into the return air fan receiving cavity; and / or, at least part of the second air outlet side duct wall is bent along the third direction toward the direction close to the first air outlet surface, for guiding air in the first heat exchange cavity to flow into the fresh air fan receiving cavity.

[0021] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the structure of a heat exchange device according to some embodiments of the present disclosure;

[0024] Figure 2 Here is an exploded view of the structure of a heat exchange device according to some embodiments of this disclosure;

[0025] Figure 3 A front view of a heat exchange apparatus according to some embodiments of the present disclosure;

[0026] Figure 4 For along Figure 3 Structural cross-sectional view of line AA in the middle;

[0027] Figure 5 For along Figure 3 Structural cross-sectional view of the middle BB line;

[0028] Figure 6 This is a simplified structural diagram of a heat exchange apparatus according to some embodiments of the present disclosure;

[0029] Figure 7 A simplified structural diagram of a heat exchange apparatus according to other embodiments of this disclosure;

[0030] Figure 8 This is a schematic diagram of the structure of the air duct component of a heat exchange device according to some embodiments of the present disclosure;

[0031] Figure 9 for Figure 8 The diagram shows the assembly of the air duct components and the heat exchange core.

[0032] Figure 10 for Figure 8 Front view of the air duct component shown;

[0033] Figure 11 For along Figure 10 Structural cross-sectional view of the CC line;

[0034] Figure 12 for Figure 8 A side view of the air duct component shown;

[0035] Figure 13 For along Figure 12 Structural cross-sectional view of the DD line in the middle;

[0036] Figure 14 For along Figure 10 Structural cross-sectional view of the EE line;

[0037] Figure 15 For along Figure 10 Structural cross-sectional view of the FF line;

[0038] Figure 16 for Figure 15 The structural cross-sectional view of the air duct components and heat exchange core shown in the figure;

[0039] Figure 17 For along Figure 10 Structural cross-sectional view of the GG line in the middle;

[0040] Figure 18 for Figure 17 The diagram shows a cross-sectional view of the air duct components and the heat exchange core.

[0041] Figure label:

[0042] Heat exchange device 100

[0043] The shell 10,

[0044] The shell 11, the fresh air inlet 1101, the fresh air outlet 1102, the return air inlet 1103, the exhaust air outlet 1104, the first side wall 111, the second side wall 112, the hanging hook 113, the bottom wall 1141, the top wall 1142, the side wall 1143,

[0045] The air duct component 12, the first air inlet 1201, the first air outlet 1202, the second air inlet 1203, the second air outlet 1204, the accommodation space 1205,

[0046] The fresh air duct 121, the first air inlet cavity 1211, the first air inlet side duct wall 1211a, the second air inlet side duct wall 1211b, the first portion 1211c, the second portion 1211d, the third air inlet side duct wall 1211e, the first positioning rib 1211f, the second positioning rib 1211g, the first air outlet cavity 1212, the fresh air fan accommodating cavity 1212a, the first heat exchange cavity 1212b, the first air outlet side duct wall 1212c, the first air outlet flow guide surface 1212d,

[0047] The return air duct 122, the second air inlet cavity 1221, the second air outlet cavity 1222, the return air fan accommodating cavity 1222a, the second heat exchange cavity 1222b, the second air outlet side duct wall 1222c, the second air outlet flow guide surface 1222d,

[0048] The frame 123, the first side plate 1231, the second side plate 1232, the third side plate 1233, the end plate 1234,

[0049] The air outlet partition 124, the first limiting groove 1240, the first air outlet partition plate 1241, the second air outlet partition plate 1242, the third air outlet partition plate 1243,

[0050] The air inlet partition 125, the second limiting groove 1250, the first air inlet partition plate 1251, the second air inlet partition plate 1252,

[0051] The heat exchange core 20, the first air inlet surface 201a, the first air outlet surface 201b, the second air inlet surface 202a, the second air outlet surface 202b, the first corner 21, the second corner 22, the first intersection line 23, the second intersection line 24,

[0052] The fresh air fan 30, the return air fan 40, the fresh air filter 50, the return air filter 60. DETAILED DESCRIPTION

[0053] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations are used to denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present disclosure, and cannot be understood as a limitation on the present disclosure.

[0054] In the description of the present disclosure, it should be understood that the terms "center", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, "a plurality of" means two or more, unless otherwise specified.

[0055] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0056] Some embodiments of the present disclosure provide a structure of a heat exchange device. The heat exchange device can meet the dual needs of ventilation and purification, can exhaust the dirty air in the room and introduce fresh air from the outside, and the heat exchange device uses a heat exchange core to exchange sensible heat and latent heat, realizes maximum heat / cold recovery, adjusts the temperature of fresh air, and provides fresh air with suitable temperature for the room, while realizing environmental protection and energy saving. Such heat exchange device can be applied to various places that need to improve indoor air quality and save energy, such as residences, office buildings, hotels, hospitals, schools, laboratories, machine rooms, catering places, entertainment places, etc.

[0057] Generally, the heat exchange device includes a shell, a heat exchange core, a fresh air fan and a return air fan.

[0058] The shell has a fresh air duct and a return air duct, and the shell is provided with a fresh air inlet, a fresh air outlet, a return air inlet and an exhaust air outlet. The fresh air duct communicates the fresh air inlet and the fresh air outlet, and the return air duct communicates the return air inlet and the exhaust air outlet.

[0059] The heat exchange core is arranged in the shell, and the air flowing through the fresh air duct and the return air duct exchanges heat in the heat exchange core. For example, the heat exchange core can have a first heat exchange flow channel and a second heat exchange flow channel. The first heat exchange flow channel is located in the fresh air duct in the air flow direction, that is, the first heat exchange flow channel communicates with the fresh air duct. The second heat exchange flow channel is located in the return air duct in the air flow direction, that is, the second heat exchange flow channel communicates with the return air duct.

[0060] The fresh air fan is rotatably arranged in the fresh air duct and located between the heat exchange core and the fresh air outlet in the air flow direction. The fresh air fan provides power for the flow of outdoor air. When the fresh air fan is working, outdoor air can enter the fresh air duct from the fresh air inlet, flow through the first heat exchange flow channel of the heat exchange core, exchange heat with the heat exchange core, then flow out of the first heat exchange flow channel, and be discharged to the indoor through the fresh air outlet.

[0061] The return air fan is rotatably arranged in the return air duct and located between the heat exchange core and the exhaust outlet in the air flow direction. The return air fan provides power for the flow of indoor air. When the return air fan is working, indoor air can enter the return air duct from the exhaust outlet, flow through the second heat exchange flow channel of the heat exchange core, exchange heat with the heat exchange core, then flow out of the second heat exchange flow channel, and be discharged to the outdoor through the exhaust outlet.

[0062] For example, when the heat exchange core is cooling, the air in the fresh air duct exchanges heat with the heat exchange core and the temperature and humidity decrease, so that low-temperature and low-humidity air can be delivered to the indoor. When the heat exchange core is heating, the air in the fresh air duct exchanges heat with the heat exchange core and the temperature and humidity increase, so that high-temperature and high-humidity air can be delivered to the indoor. In addition, the air in the first heat exchange flow channel and the air in the second heat exchange flow channel can exchange heat in the same direction to recover cold energy in summer or heat energy in winter.

[0063] The heat exchange device further comprises a control device, which is mainly used for controlling the rotating speed of the fresh air fan and the rotating speed of the return air fan, etc. The control device is connected with the fresh air fan, the return air fan, etc. through a data line to transmit communication information.

[0064] The control device comprises 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 a program stored in a non-transitory computer readable medium coupled to the control device.

[0065] The non-transitory computer-readable storage medium can include a magnetic storage device (e.g., hard disk, floppy disk, or magnetic tape), an intelligent card, or a flash memory device (e.g., an erasable programmable read-only memory (EPROM), a card, a stick, or a key drive).

[0066] The heat exchange device according to the present disclosure is an indoor unit. The heat exchange device is usually installed on a roof, for example, in an indoor ceiling.

[0067] The heat exchange device 100 according to some embodiments of the present disclosure is described below with reference to the accompanying drawings.

[0068] Please refer to Figures 1-7 The heat exchange device 100 according to some embodiments of the present disclosure includes a housing 10, the housing 10 having a fresh air duct 121 and a return air duct 122 therein, the housing 10 being provided with a fresh air inlet 1101, a fresh air outlet 1102, a return air inlet 1103, and an exhaust air outlet 1104, the fresh air duct 121 being in communication with the fresh air inlet 1101 and the fresh air outlet 1102, and the return air duct 122 being in communication with the return air inlet 1103 and the exhaust air outlet 1104.

[0069] The heat exchange device 100 further includes a heat exchange core 20, the heat exchange core 20 being arranged in the housing 10, and air flowing through the fresh air duct 121 and the return air duct 122 being subjected to heat exchange in the heat exchange core 20.

[0070] The heat exchange device 100 further includes a fresh air fan 30 and a return air fan 40, the fresh air fan 30 being rotatably arranged in the fresh air duct 121 and located between the heat exchange core 20 and the fresh air outlet 1102 in the air flow direction, and the return air fan 40 being rotatably arranged in the return air duct 122 and located between the heat exchange core 20 and the exhaust air outlet 1104 in the air flow direction.

[0071] The heat exchange core 20 can reduce the temperature and humidity of air in the fresh air duct 121 in a cooling condition, and can increase the temperature and humidity of air in the fresh air duct 121 in a heating condition. Specifically, the enthalpy efficiency and temperature efficiency of the heat exchange core 20 in the cooling and heating conditions can be set to calculate the state parameters of the fresh air outlet 1102 and the exhaust air outlet 1104. The enthalpy of air refers to the energy possessed by the air.

[0072] For example, in the case that the fresh air volume and the exhaust air volume are the same, the calculation process of the enthalpy efficiency and the temperature efficiency of the heat exchange core 20 is as follows:

[0073] Enthalpy efficiency: Temperature efficiency:

[0074] In the formula: i1, i2, i3 (kJ / kg) represent the enthalpy of the fresh air inlet 1101, the enthalpy of the fresh air outlet 1102, and the enthalpy of the return air outlet 1103; t1, t2, t3 (℃) represent the temperature of the fresh air inlet 1101, the temperature of the fresh air outlet 1102, and the temperature of the return air outlet 1103.

[0075] The calculation formula of the wet air enthalpy (kJ / kg) is: i = 1.01 × t + (2500 + 1.84 × t) × d;

[0076] In the formula: t (℃) represents the air temperature; d (g / kg) represents the moisture content of the air; and 1.01 (kJ / (kg·K)) represents the average constant-pressure specific heat of dry air.

[0077] Please refer to Figure 2 , Figures 4-7 In some embodiments, the fresh air duct 121 includes a first air inlet cavity 1211 and a first air outlet cavity 1212, and the heat exchange core 20 is located between the first air inlet cavity 1211 and the first air outlet cavity 1212, so that the first air inlet cavity 1211 is connected to the fresh air inlet 1101 and the first heat exchange flow channel of the heat exchange core 20, and the first air outlet cavity 1212 is connected to the fresh air outlet 1102 and the first heat exchange flow channel of the heat exchange core 20. In this way, the air entering the shell 10 from the fresh air inlet 1101 can flow through the first air inlet cavity 1211, the first heat exchange flow channel of the heat exchange core 20, and the first air outlet cavity 1212 in sequence, and finally be discharged from the fresh air outlet 1102.

[0078] The return air duct 122 includes a second air inlet cavity 1221 and a second air outlet cavity 1222, and the heat exchange core 20 is located between the second air inlet cavity 1221 and the second air outlet cavity 1222, so that the second air inlet cavity 1221 is connected to the return air outlet 1103 and the second heat exchange flow channel of the heat exchange core 20, and the second air outlet cavity 1222 is connected to the exhaust air outlet 1104 and the second heat exchange flow channel of the heat exchange core 20. In this way, the air entering the shell 10 from the return air outlet 1103 can flow through the second air inlet cavity 1221, the second heat exchange flow channel of the heat exchange core 20, and the second air outlet cavity 1222 in sequence, and finally be discharged from the exhaust air outlet 1104.

[0079] The length direction of the heat exchange core 20 extends along the first direction, and the first direction can be the left-right direction, for example, the left-right direction shown in Figure 3 The first air inlet cavity 1211 and the second air inlet cavity 1221 are located on one side of the length direction of the heat exchange core 20, the first air outlet cavity 1212 and the second air outlet cavity 1222 are located on the other side of the length direction of the heat exchange core 20, and are arranged in the length direction of the heat exchange core 20. The fresh air fan 30 is arranged in the first air outlet cavity 1212, and the return air fan 40 is arranged in the second air outlet cavity 1222.

[0080] Please refer toFigure 4 and Figure 5 The heat exchange device 100 further comprises a fresh air filtering piece 50 arranged in the first air inlet cavity 1211. That is, in the air flow direction, the fresh air filtering piece 50 is located between the fresh air inlet 1101 and the heat exchange core 20.

[0081] The fresh air filtering piece 50 can filter the air entering the first air inlet cavity 1211 from the fresh air inlet 1101, on the one hand, reducing the pollution of the heat exchange core 20 by dirty air, thereby ensuring the heat exchange effect of the heat exchange core 20, on the other hand, avoiding the pollution of the dirty air outside to the indoor, improving the cleanliness of the indoor air, thereby improving the user experience.

[0082] The fresh air filtering piece 50 can include one filtering structure, or can include multiple filtering structures. For example, the fresh air filtering piece 50 can include a coarse efficiency filtering structure and a high efficiency filtering structure, which can be integrated, on the one hand, facilitating assembly and replacement, on the other hand, reducing the volume of the fresh air filtering piece 50 occupying the fresh air duct 121, and facilitating the reduction of the volume of the heat exchange device 100.

[0083] For example, the coarse efficiency filtering structure as the primary efficiency filtering structure can adopt a non-woven fabric filter core, which can filter large particles of dust and insects in the air into the heat exchange core 20; the high efficiency filtering structure can adopt glass fiber filtering material and melt-blown non-woven filtering material, which can have a high interception effect on particulate matter, bacteria and viruses.

[0084] Please refer to Figure 8 and Figure 9 In some embodiments, the first air inlet cavity 1211 has a first air inlet side duct wall 1211a located upstream of the fresh air filtering piece 50 in the air flow direction, and the first air inlet side duct wall 1211a is arranged opposite the fresh air filtering piece 50 in a second direction, and the second direction is perpendicular to the first direction. The first direction here can be a first horizontal direction, for example, the left-right direction shown in Figure 3 , and the second direction can be a second horizontal direction, for example, the front-rear direction in Figure 4 and Figure 5 .

[0085] Among them, the first air inlet side duct wall 1211a gradually approaches the fresh air filtering piece 50 in the direction away from the fresh air inlet 1101 in the first direction.

[0086] For example, the distance between a portion of the first air inlet side duct wall 1211a and the fresh air filter 50 in the second direction gradually decreases in the first direction along the direction away from the fresh air inlet 1101. For another example, the distance between the entire structure of the first air inlet side duct wall 1211a and the fresh air filter 50 in the second direction gradually decreases in the first direction along the direction away from the fresh air inlet 1101.

[0087] For example, at least a portion of the surface of the first air inlet side duct wall 1211a can form an arc surface that gradually curves towards the fresh air filter 50 in the first direction along the direction away from the fresh air inlet 1101.

[0088] For example, at least a portion of the surface of the first air inlet side duct wall 1211a can form an inclined surface that gradually approaches the fresh air filter 50 in the first direction along the direction away from the fresh air inlet 1101.

[0089] According to the heat exchange device 100 of the embodiments of the present disclosure, by making the first air inlet side duct wall 1211a gradually approach the fresh air filter 50 in the first direction along the direction away from the fresh air inlet 1101, the cross-sectional area of the first air inlet cavity 1211 perpendicular to the first direction can gradually decrease in the first direction along the direction away from the fresh air inlet 1101, so that the air entering the first air inlet cavity 1211 from the fresh air inlet 1101 can flow along the surface of the first air inlet side duct wall 1211a and flow to the entire section of the fresh air filter 50 extending in the first direction under the guidance of the first air inlet side duct wall 1211a, reducing airflow separation, thereby improving the uniformity of the air field on the surface of the fresh air filter 50 and the heat exchange core 20, reducing airflow resistance, and further reducing the working noise of the entire machine.

[0090] Please refer to Figures 1-3 In some embodiments, the shell 10 has a first side wall 111 and a second side wall 112, the first side wall 111 and the second side wall 112 are oppositely arranged in the first direction, and the first side wall 111 and the second side wall 112 both extend in the second direction.

[0091] The fresh air inlet 1101 and the exhaust outlet 1104 are both arranged on the first side wall 111, and the fresh air inlet 1101 and the exhaust outlet 1104 are arranged in the second direction, i.e., the fresh air inlet 1101 and the exhaust outlet 1104 are arranged in the length direction of the first side wall 111.

[0092] The fresh air outlet 1102 and the return air outlet 1103 are both arranged on the second side wall 112, and the fresh air outlet 1102 and the return air outlet 1103 are arranged in the second direction, i.e., the fresh air outlet 1102 and the return air outlet 1103 are arranged in the length direction of the second side wall 112.

[0093] In the technical scheme, the fresh air inlet 1101 and the exhaust outlet 1104 are arranged on the same side wall, the pipeline connected to the outdoor side can be connected to the same side wall, the fresh air outlet 1102 and the return air outlet 1103 are arranged on the same side wall, the pipeline connected to the indoor side can be connected to the same side wall, the pipeline arrangement is facilitated, the pipeline arrangement is simplified, the pipeline arrangement is more neat, the length of the pipeline is shortened, and the material cost is reduced.

[0094] In the embodiment in which the shell 10 has the first side wall 111 and the second side wall 112, the first air inlet side duct wall 1211a gradually approaches the fresh air filter 50 in the first direction from the first side wall 111 to the second side wall 112. For example, at least a part of the surface of the first air inlet side duct wall 1211a can form an arc surface that gradually bends towards the fresh air filter 50 in the first direction from the first side wall 111 to the second side wall 112. For example, at least a part of the surface of the first air inlet side duct wall 1211a can form an inclined surface that gradually approaches the fresh air filter 50 in the first direction from the first side wall 111 to the second side wall 112.

[0095] Please refer to Figure 10 In some embodiments, the distance between the end of the first air inlet side duct wall 1211a close to the fresh air inlet 1101 and the fresh air filter 50 in the second direction is X, and the distance between the end of the first air inlet side duct wall 1211a away from the fresh air inlet 1101 and the fresh air filter 50 in the second direction is Y. If X / Y is too large or too small, the uniformity of the air field on the surface of the fresh air filter 50 and the heat exchange core 20 will be affected.

[0096] In some embodiments, the distance between the first air inlet side duct wall 1211a and the fresh air filter 50 in the second direction gradually decreases in the first direction away from the fresh air inlet 1101, and X / Y is 4.5-7. For example, X / Y can be 4.5, 5, 5.5, 6, 6.5, 7, etc.

[0097] In the technical scheme, by limiting the ratio of the distance between the end of the first air inlet side duct wall 1211a close to the fresh air inlet 1101 and the fresh air filter 50 in the second direction and the distance between the end of the first air inlet side duct wall 1211a away from the fresh air inlet 1101 and the fresh air filter 50 in the second direction, the air entering the first air inlet cavity 1211 from the fresh air inlet 1101 can flow along the surface of the first air inlet side duct wall 1211a, so that the uniformity of the air field on the surface of the fresh air filter 50 and the heat exchange core 20 can be improved, the air flow resistance can be reduced, the working noise of the whole machine can be reduced, and the heat exchange efficiency of the heat exchange core 20 can be improved.

[0098] Please refer to Figure 10In some embodiments, the distance between the one end of the first air inlet side duct wall 1211a close to the fresh air inlet 1101 and the fresh air filter 50 in the second direction is greater than or equal to 15 mm. For example, the distance Y between the one end of the first air inlet side duct wall 1211a away from the fresh air inlet 1101 and the fresh air filter 50 in the second direction can be 15 mm, 18 mm, 20 mm, etc.

[0099] In the above technical solution, by limiting the distance between the one end of the first air inlet side duct wall 1211a away from the fresh air inlet 1101 and the fresh air filter 50 in the second direction to satisfy the above range, the air entering the first air inlet cavity 1211 from the fresh air inlet 1101 can flow to the position of the fresh air filter 50 away from the fresh air inlet 1101 as much as possible, thereby improving the air field uniformity of the surface of the fresh air filter 50 and the heat exchange core 20, reducing the air flow resistance, and further reducing the working noise of the air conditioner.

[0100] Please refer to Figure 9 and Figure 10 again, and further refer to Figure 11 In some embodiments, the first air inlet cavity 1211 further has a second air inlet side duct wall 1211b, and in the second direction, the second air inlet side duct wall 1211b is located between the fresh air filter 50 and the first air inlet side duct wall 1211a.

[0101] In some embodiments, at least a part of the second air inlet side duct wall 1211b gradually approaches the middle position of the first air inlet cavity 1211 in the third direction in the direction away from the fresh air inlet 1101 in the first direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0102] Here, the first direction can be a first horizontal direction, for example, the left-right direction shown in Figure 3 , the second direction can be a second horizontal direction, for example, the front-rear direction in Figure 4 and Figure 5 , and the third direction can be a vertical direction, for example, the up-down direction in Figure 4 and Figure 5 . Specifically to Figure 11 , at least a part of the second air inlet side duct wall 1211b gradually extends downward from left to right.

[0103] For example, at least a part of the surface of the second air inlet side duct wall 1211b can form an arc surface that gradually bends toward the middle of the first air inlet cavity 1211 in the third direction in the direction away from the fresh air inlet 1101 in the first direction.

[0104] For example, at least a portion of the surface of the second air inlet side air duct wall 1211b can be formed as a slope gradually approaching the middle of the first air inlet cavity 1211 in the third direction in the first direction away from the fresh air inlet 1101.

[0105] In this way, the cross-sectional area of the first air inlet cavity 1211 perpendicular to the first direction gradually decreases in the first direction away from the fresh air inlet 1101, so that the air entering the first air inlet cavity 1211 from the fresh air inlet 1101 can flow along the surface of the second air inlet side air duct wall 1211b and flow to the entire section of the fresh air filter 50 extending in the first direction under the guidance of the second air inlet side air duct wall 1211b, reducing airflow separation, thereby improving the uniformity of the air field on the surface of the fresh air filter 50 and the heat exchange core 20, reducing airflow resistance, and further reducing the operating noise of the entire machine.

[0106] In embodiments where the shell 10 has a first side wall 111 and a second side wall 112, at least a portion of the second air inlet side air duct wall 1211b gradually approaches the middle of the first air inlet cavity 1211 in the third direction in the first direction from the first side wall 111 to the second side wall 112. For example, at least a portion of the surface of the second air inlet side air duct wall 1211b can be formed as an arc surface gradually curved toward the middle of the first air inlet cavity 1211 in the third direction in the first direction from the first side wall 111 to the second side wall 112. For example, at least a portion of the surface of the second air inlet side air duct wall 1211b can be formed as a slope gradually approaching the middle of the first air inlet cavity 1211 in the third direction in the first direction from the first side wall 111 to the second side wall 112.

[0107] Please refer again to Figure 9 and Figure 11 In some embodiments, the second air inlet side air duct wall 1211b includes a first portion 1211c and a second portion 1211d, the first portion 1211c is located between the fresh air inlet 1101 and the second portion 1211d in the first direction; the first portion 1211c gradually approaches the middle of the first air inlet cavity 1211 in the third direction in the first direction away from the fresh air inlet 1101, and the second portion 1211d extends in the first direction.

[0108] That is, the portion of the second air inlet side air duct wall 1211b close to the fresh air inlet 1101 can be provided as an arc surface or a slope, which on the one hand can maximize the air inlet of the fresh air inlet 1101, and on the other hand can make the air entering the first air inlet cavity 1211 from the fresh air inlet 1101 flow along the second air inlet side air duct wall 1211b, so that the air is more evenly distributed and flows to the fresh air filter 50.

[0109] Please refer again to Figure 11In some embodiments, the inclination angle of the first portion 1211c relative to the plane determined by the first direction and the second direction is α. Specifically, if the first portion 122 is a curved surface, the inclination angle here refers to the inclination angle of the tangent plane of the first portion 1211c relative to the plane determined by the first direction and the second direction is α; if the first portion 122 is an inclined surface, the inclination angle here refers to the inclination angle of the first portion 1211c relative to the plane determined by the first direction and the second direction is α.

[0110] wherein the inclination angle α is less than 0° and less than 30°, or equal to 30°. For example, α can be 5°, 10°, 15°, 20°, 25°, 30°, etc.

[0111] If the inclination angle of the first portion 1211c relative to the plane determined by the first direction and the second direction is too large, it will affect the structural size of the second air inlet cavity 1221, thereby affecting the return air demand of the return air outlet 1103, and also increasing the molding difficulty of the air duct component 12.

[0112] In the above technical solution, by limiting the inclination angle of the first portion 1211c to satisfy the above range, the air inlet of the portion of the first air inlet cavity 1211 of the fresh air duct 121 close to the first side wall 111 can be maximized.

[0113] Please refer to Figure 11 In some embodiments, the length of the first portion 1211c in the first direction is L1, and the length of the second air inlet side air duct wall 1211b in the first direction is L, and L1 / L is 0.4-0.6. For example, L1 / L can be 0.4, 0.5, 0.6.

[0114] If the length L1 of the first portion 1211c in the first direction is too small, there is a problem of uneven wind field flowing through the fresh air filter 50, thereby affecting the air inlet demand of the fresh air inlet 1101, and if the length L1 of the first portion 1211c in the first direction is too large, it will affect the structural size of the second air inlet cavity 1221, thereby affecting the return air demand of the return air outlet 1103, and also increasing the molding difficulty of the air duct component 12.

[0115] In the above technical solution, by limiting L1 / L to satisfy the above range, the uniformity of the wind field flowing through the fresh air filter 50 can be improved, the air resistance in the fresh air duct 121 can be reduced, the structural size of the first air inlet cavity 1211 and the second air inlet cavity 1221 can satisfy the demand of balancing the air resistance in the fresh air duct 121 and the return air duct 122, thereby satisfying the air inlet demand of the fresh air inlet 1101 and the return air demand of the return air outlet 1103, and also reducing the molding difficulty of the air duct component 12.

[0116] In some embodiments, the first air inlet side duct wall 1211a and the second air inlet side duct wall 1211b are connected, and the first air inlet cavity 1211 and the second air inlet cavity 1221 are at least partially separated by the first air inlet side duct wall 1211a and the second air inlet side duct wall 1211b.

[0117] That is, the first air inlet side duct wall 1211a and the second air inlet side duct wall 1211b can serve as a separation structure (such as the air inlet separator 125 described below) separating the first air inlet cavity 1211 and the second air inlet cavity 1221, and a portion of the first air inlet cavity 1211 and the second air inlet cavity 1221 can be arranged in the second direction and separated by the first air inlet side duct wall 1211a, and another portion of the first air inlet cavity 1211 and the second air inlet cavity 1221 can be arranged in the third direction and separated by the second air inlet side duct wall 1211b.

[0118] In this way, the first air inlet side duct wall 1211a and the second air inlet side duct wall 1211b can be matched with the heat exchange core 20 to effectively separate the internal space of the shell 10 and obtain the asymmetrically arranged first air inlet cavity 1211 and the second air inlet cavity 1221, thereby improving the utilization rate of the internal space of the shell 10.

[0119] Please refer again to Figure 10 In some embodiments, the first air inlet cavity 1211 further has a third air inlet side duct wall 1211e extending in the first direction, and the third air inlet side duct wall 1211e is connected to the side of the second air inlet side duct wall 1211b away from the first air inlet side duct wall 1211a. That is, in the second direction, the second air inlet side duct wall 1211b is located between the first air inlet side duct wall 1211a and the third air inlet side duct wall 1211e.

[0120] The third air inlet side duct wall 1211e is provided with a first positioning rib 1211f and a second positioning rib 1211g, and the first positioning rib 1211f and the second positioning rib 1211g are arranged in the second direction. The fresh air filter 50 is located between the first positioning rib 1211f and the second positioning rib 1211g. The first positioning rib 1211f and the second positioning rib 1211g can limit the fresh air filter 50, reduce displacement of the fresh air filter 50, and improve installation reliability and stability of the fresh air filter 50.

[0121] Please refer again to Figures 2-7In some embodiments, the peripheral wall of the heat exchange core 20 has a first air inlet face 201a, a first air outlet face 201b, a second air inlet face 202a, and a second air outlet face 202b. That is, the cross-sectional shape of the heat exchange core 20 is polygonal, and the number of sides of the polygon is at least 4. For example, the cross-sectional shape of the heat exchange core 20 can be quadrilateral, pentagonal, hexagonal, etc.

[0122] The first air inlet face 201a, the first air outlet face 201b, the second air inlet face 202a, and the second air outlet face 202b all extend along a first direction. The first air inlet face 201a and the second air outlet face 202b are opposite and angularly arranged in a second direction. The first air inlet face 201a and the second air inlet face 202a are opposite and angularly arranged in a third direction. The first air outlet face 201b and the second air inlet face 202a are opposite and angularly arranged in the second direction. The first air outlet face 201b and the second air outlet face 202b are opposite and angularly arranged in the third direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0123] Please refer to Figure 2 , Figure 4 and Figure 5 , the fresh air duct 121 includes a first air inlet cavity 1211 and a first air outlet cavity 1212. The first air inlet cavity 1211 is located between the fresh air inlet 1101 and the first air inlet face 201a. The first air outlet cavity 1212 is located between the fresh air outlet 1102 and the first air outlet face 201b. The return air duct 122 includes a second air inlet cavity 1221 and a second air outlet cavity 1222. The second air inlet cavity 1221 is located between the return air inlet 1103 and the second air inlet face 202a. The second air outlet cavity 1222 is located between the return air outlet 1104 and the second air outlet face 202b.

[0124] In the above technical solution, by arranging the heat exchange core 20 in the above structure, and cooperating the internal mechanism of the shell 10 with the heat exchange core 20, the first air inlet cavity 1211 and the first air outlet cavity 1212 of the fresh air duct 121, and the second air inlet cavity 1221 and the second air outlet cavity 1222 of the return air duct 122 can be formed. The structure is simple and easy to implement.

[0125] Please refer to Figure 4 and Figure 5 In some embodiments, the first air outlet cavity 1212 includes a fresh air fan accommodating cavity 1212a and a first heat exchange cavity 1212b, and the fresh air fan accommodating cavity 1212a and the first heat exchange cavity 1212b are arranged in the second direction. The second air outlet cavity 1222 includes a return air fan accommodating cavity 1222a and a second heat exchange cavity 1222b, and the return air fan accommodating cavity 1222a and the second heat exchange cavity 1222b are arranged in the second direction.

[0126] The fresh air fan accommodating cavity 1212a and the return air fan accommodating cavity 1222a are arranged in the first direction, and in the second direction, the first heat exchange cavity 1212b is located between the first air outlet surface 201b and the fresh air fan accommodating cavity 1212a, and the second heat exchange cavity 1222b is located between the second air outlet surface 202b and the return air fan accommodating cavity 1222a.

[0127] Since the first air outlet surface 201b and the second air outlet surface 202b are arranged in the third direction, the first air outlet cavity 1212 and the first heat exchange cavity 1212b and the second heat exchange cavity 1222b of the second air outlet cavity 1222 are also arranged in the third direction, and the fresh air fan accommodating cavity 1212a and the return air fan accommodating cavity 1222a are arranged in the first direction, so that the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 can be different.

[0128] In some embodiments, the structures of the first air inlet cavity 1211 and the second air inlet cavity 1221 are different, and / or the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 are different, and the total volume of the first air inlet cavity 1211 and the first air outlet cavity 1212 is greater than the total volume of the second air inlet cavity 1221 and the second air outlet cavity 1222.

[0129] Since the fresh air filter 50 is arranged in the first air inlet cavity 1211 of the fresh air air duct 121, the arrangement of the fresh air filter 50 can filter air and improve the cleanliness of indoor air, but at the same time, it will also increase the air flow resistance in the fresh air air duct 121, reduce the air volume of the fresh air entering the indoor, and also increase the working noise of the whole machine. In the case that the fresh air fan 30 and the return air fan 40 are the same, the speed of the fresh air fan 30 needs to be increased to achieve the same fresh air volume and return air volume, which will also increase the working noise of the whole machine.

[0130] In the case that the structure shape and volume of the heat exchange device 100 are unchanged, the structures of the first air inlet cavity 1211 and the second air inlet cavity 1221 are set to be different, and / or the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 are set to be different, and the total volume of the first air inlet cavity 1211 and the first air outlet cavity 1212 is greater than the total volume of the second air inlet cavity 1221 and the second air outlet cavity 1222, so that the structures of the fresh air duct 121 and the return air duct 122 are asymmetric, and in the case that the air flow in the fresh air duct 121 is unchanged, increasing the volume of the fresh air duct 121 can generally reduce the air speed in the fresh air duct 121, and according to the pressure loss formula related to air resistance, the reduction of the air speed in the fresh air duct 121 can reduce the air resistance in the fresh air duct 121, thereby reducing the working noise of the whole machine; and in the case that the fresh air volume and the return air volume are the same, the pressure loss in the fresh air duct 121 is reduced, and the rotation speed of the fresh air fan 30 can be reduced to balance the air resistance of the fresh air duct 121 and the return air duct 122, thereby reducing the working noise of the whole machine.

[0131] Therefore, in the case that the fresh air filter 50 is arranged in the first air inlet cavity 1211, the structures of the first air inlet cavity 1211 and the second air inlet cavity 1221 are set to be different, and / or the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 are set to be different, and the total volume of the first air inlet cavity 1211 and the first air outlet cavity 1212 is greater than the total volume of the second air inlet cavity 1221 and the second air outlet cavity 1222, so that the structures of the fresh air duct 121 and the return air duct 122 are asymmetric, and the air resistance in the fresh air duct 121 can be reduced, thereby reducing the working noise of the whole machine.

[0132] In some embodiments, the first air inlet cavity 1211 and the second air inlet cavity 1221 are arranged at least partially in the third direction, and the structures of the first air inlet cavity 1211 and the second air inlet cavity 1221 are different, and the volume of the first air inlet cavity 1211 is greater than the volume of the second air inlet cavity 1221. In this embodiment, the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 can be the same, and the volumes of the first air outlet cavity 1212 and the second air outlet cavity 1222 can be set to be equal, for example, the first air outlet cavity 1212 and the second air outlet cavity 1222 can be symmetrically arranged; or the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 can be different, and the volume of the first air outlet cavity 1212 can be greater than the volume of the second air outlet cavity 1222.

[0133] Therefore, in the case that the structure shape and volume of the heat exchange device 100 are unchanged, the structures of the first air inlet cavity 1211 and the second air inlet cavity 1221 are set to be different, and the volume of the first air inlet cavity 1211 is greater than the volume of the second air inlet cavity 1221, so that the structures of the first air inlet cavity 1211 and the second air inlet cavity 1221 are asymmetric, and the air speed in the first air inlet cavity 1211 can be reduced, thereby reducing the air resistance in the first air inlet cavity 1211, and facilitating the reduction of the working noise of the whole machine.

[0134] In some embodiments, the first air outlet cavity 1212 and the second air outlet cavity 1222 have different structures, and the volume of the first air outlet cavity 1212 is greater than that of the second air outlet cavity 1222. In this embodiment, the first air inlet cavity 1211 and the second air inlet cavity 1221 can have the same structure, and the volumes of the first air inlet cavity 1211 and the second air inlet cavity 1221 can be set to be equal, for example, the first air inlet cavity 1211 and the second air inlet cavity 1221 can be symmetrically arranged; or the first air inlet cavity 1211 and the second air inlet cavity 1221 can have different structures, and the volume of the first air inlet cavity 1211 can be greater than that of the second air inlet cavity 1221.

[0135] Therefore, in the case that the structure shape and volume of the heat exchange device 100 are unchanged, the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 are set to be different, and the volume of the first air outlet cavity 1212 is greater than that of the second air outlet cavity 1222, so that the structures of the first air outlet cavity 1212 and the second air outlet cavity 1222 are asymmetric, which can reduce the air speed in the first air outlet cavity 1212, thereby reducing the air resistance in the first air outlet cavity 1212, and facilitating the reduction of the working noise of the whole machine.

[0136] Please refer again to Figure 4 and Figure 5 In some embodiments, the first air outlet cavity 1212 includes a fresh air fan accommodating cavity 1212a and a first heat exchange cavity 1212b, and the fresh air fan accommodating cavity 1212a and the first heat exchange cavity 1212b are arranged in the second direction. The second air outlet cavity 1222 includes a return air fan accommodating cavity 1222a and a second heat exchange cavity 1222b, and the return air fan accommodating cavity 1222a and the second heat exchange cavity 1222b are arranged in the second direction.

[0137] Among them, the fresh air fan accommodating cavity 1212a and the return air fan accommodating cavity 1222a are arranged in the first direction, and in the second direction, the first heat exchange cavity 1212b is located between the first air outlet surface 201b and the fresh air fan accommodating cavity 1212a, the second heat exchange cavity 1222b is located between the second air outlet surface 202b and the return air fan accommodating cavity 1222a, and the volume of the first heat exchange cavity 1212b is greater than that of the second heat exchange cavity 1222b.

[0138] In addition, since the first air outlet surface 201b and the second air outlet surface 202b are oppositely arranged and angularly arranged in the third direction, the first heat exchange cavity 1212b of the first air outlet cavity 1212 and the second heat exchange cavity 1222b of the second air outlet cavity 1222 are arranged in the third direction.

[0139] Therefore, by arranging the fresh air fan accommodating cavity 1212a and the first heat exchange cavity 1212b of the first air outlet cavity 1212 and the return air fan accommodating cavity 1222a and the second heat exchange cavity 1222b of the second air outlet cavity 1222 in the above manner, the asymmetric arrangement of the first air outlet cavity 1212 and the second air outlet cavity 1222 can be achieved, which is beneficial to reducing the air resistance of the first air outlet cavity 1212, so as to reduce the working noise of the whole machine.

[0140] Please refer again to Figures 4-6 In some embodiments, the cross-sectional shape of the shell 10 perpendicular to the first direction is a rectangle, and the cross-sectional shape of the heat exchange core 20 perpendicular to the first direction is a square.

[0141] The heat exchange core 20 with a square cross-sectional shape has the advantages of simple structure and small space occupation, and by adjusting the placement position of the heat exchange core 20, the structure and size of the first air inlet cavity 1211, the first air outlet cavity 1212, the second air inlet cavity 1221 and the second air outlet cavity 1222 can be adjusted, so that the fresh air duct 121 and the return air duct 122 are designed asymmetrically, thereby meeting the requirements.

[0142] In some embodiments, the angle between the plane determined by the first direction and the second direction and the first air inlet face 201a is greater than the angle between the plane determined by the first direction and the second direction and the second air inlet face 202a, so that the first air inlet cavity 1211 and the second air inlet cavity 1221 are asymmetrically arranged about the plane determined by the first direction and the second direction.

[0143] Specifically, the first air inlet face 201a and the second air outlet face 202b have a first intersection line 23, the first air outlet face 201b and the second air inlet face 202a have a second intersection line 24, and the second direction is inclined relative to the plane in which the first intersection line 23 and the second intersection line 24 are located, which is equivalent to tilting the heat exchange core 20 with a square cross-sectional shape.

[0144] In this way, the first air inlet face 201a and the second air inlet face 202a are asymmetrically arranged about the plane determined by the first direction and the second direction, and the first air outlet face 201b and the second air outlet face 202b are asymmetrically arranged about the plane determined by the first direction and the second direction, and in combination with the structure of the shell 10, so that at least part of the first air inlet cavity 1211 of the fresh air duct 121 and at least part of the second air inlet cavity 1221 of the return air duct 122 are arranged in double layers in the third direction, and at least part of the first air outlet cavity 1212 of the fresh air duct 121 and at least part of the second air outlet cavity 1222 of the return air duct 122 are arranged in double layers in the third direction.

[0145] Therefore, by setting the cross section of the heat exchange core 20 as a square and by setting the heat exchange core 20 to be inclined, the air flow resistance of the fresh air duct 121 and the return air duct 122 can be balanced, the rotation speed of the fresh air fan 30 in the fresh air duct 121 can be reduced, and thus the noise of the entire machine can be reduced.

[0146] In the embodiment in which the cross section of the housing 10 perpendicular to the first direction is a rectangle and the cross section of the heat exchange core 20 perpendicular to the first direction is a square, the volume of the first air inlet cavity 1211 can be greater than the volume of the second air inlet cavity 1221, and the volume of the first air outlet cavity 1212 and the volume of the second air outlet cavity 1222 can be equal, or the volume of the first air outlet cavity 1212 can be greater than the volume of the second air outlet cavity 1222, so as to realize the asymmetric design of the fresh air duct 121 and the return air duct 122.

[0147] Please refer again to Figure 7 In other embodiments, the cross section of the housing 10 perpendicular to the first direction is a rectangle, and the cross section of the heat exchange core 20 perpendicular to the first direction is a rectangle.

[0148] Since the rectangle has a long side and a short side, for the heat exchange core 20 with a rectangular cross section, the asymmetric design of the fresh air duct 121 and the return air duct 122 can be realized according to the structural characteristics of the heat exchange core 20, and by adjusting the placement position of the heat exchange core 20, the structures and sizes of the first air inlet cavity 1211, the first air outlet cavity 1212, the second air inlet cavity 1221, and the second air outlet cavity 1222 can also be adjusted, so that the fresh air duct 121 and the return air duct 122 are designed to be asymmetric, thereby meeting the requirements.

[0149] In some embodiments, the width of the first air inlet face 201a is greater than the width of the second air inlet face 202a, and the width of the first air outlet face 201b is greater than the width of the second air outlet face 202b, so that the first air inlet cavity 1211 and the second air inlet cavity 1221 are arranged asymmetrically with respect to the planes determined by the first direction and the second direction, and the first air outlet cavity 1212 and the second air outlet cavity 1222 are arranged asymmetrically with respect to the planes determined by the first direction and the second direction.

[0150] Since the area of the first air inlet face 201a of the heat exchange core 20 is greater than the area of the second air inlet face 202a, and the area of the first air outlet face 201b of the heat exchange core 20 is greater than the area of the second air outlet face 202b, the first air inlet face 201a and the second air inlet face 202a can be arranged asymmetrically with respect to the planes determined by the first direction and the second direction, and the first air outlet face 201b and the second air outlet face 202b can be arranged asymmetrically with respect to the planes determined by the first direction and the second direction.

[0151] The length-width ratio of the rectangle is in the range of 1.0-1.5, for example, the length-width ratio of the rectangle can be 1.1, 1.2, 1.3, 1.4, 1.5, etc. One of the diagonals of the rectangle can be perpendicular to the plane determined by the first direction and the second direction, or can be arranged at an angle with the plane.

[0152] In this way, the air in the fresh air duct 121 flows through the heat exchange core 20, and due to the large area of the first air inlet face 201a and the first air outlet face 201b, the flow rate of the air passing through the heat exchange core 20 can be reduced, thereby reducing the resistance of the heat exchange core 20 and the entire machine in the fresh air duct 121; the air in the return air duct 122 flows through the heat exchange core 20, and due to the small area of the second air inlet face 202a and the second air outlet face 202b, the flow rate of the air passing through the heat exchange core 20 can be increased, thereby increasing the resistance of the heat exchange core 20 and the entire machine in the return air duct 122.

[0153] Therefore, by setting the cross section of the heat exchange core 20 as a rectangle, the asymmetric design of the fresh air duct 121 and the return air duct 122 can be achieved, the air resistance of the fresh air duct 121 and the return air duct 122 is balanced, and the air resistance of the fresh air duct 121 and the return air duct 122 is the same, thereby ensuring that the air volume in the fresh air duct 121 and the return air duct 122 is the same when the rotational speed of the fresh air fan 30 and the return air fan 40 is the same. While the air flow in the fresh air duct 121 remains unchanged, increasing the volume of the fresh air duct 121 can generally reduce the air speed in the fresh air duct 121, thereby reducing the air resistance in the fresh air duct 121 and the working noise of the entire machine.

[0154] In addition, under the same air volume, the air flow rate in the fresh air duct 121 is low, and the air flow rate in the return air duct 122 is high, which effectively improves the heat exchange efficiency of the heat exchange core 20 and improves the sensible heat and latent heat efficiency.

[0155] Please refer again to Figure 7 In some embodiments, the first air inlet face 201a and the second air outlet face 202b have a first intersection line 23, the first air outlet face 201b and the second air inlet face 202a have a second intersection line 24, and the plane where the first intersection line 23 and the second intersection line 24 are located is perpendicular to the second direction. In this way, the first air inlet face 201a and the second air inlet face 202a can be asymmetrically arranged with respect to the plane determined by the first direction and the second direction, and the first air outlet face 201b and the second air outlet face 202b can be asymmetrically arranged with respect to the plane determined by the first direction and the second direction, so that the fresh air duct 121 and the return air duct 122 can be designed asymmetrically, thereby meeting the requirements.

[0156] Please refer again to Figure 6In some embodiments, the return air filter 60 can be arranged in the second air inlet cavity 1221 of the return air duct 122, and the return air filter 60 can be a coarse filter structure. In some embodiments, the coarse filter structure can be a non-woven fabric filter element, which can filter large particles of dust and insects in the air from entering the heat exchange core 20. The coarse filter structure can be attached to the second air inlet face 202a of the heat exchange core 20, so that the coarse filter structure is integrated with the heat exchange core 20, and the volume of the coarse filter structure in the return air duct 122 is reduced, which is conducive to reducing the volume of the heat exchange device 100.

[0157] In some embodiments, the rotation axis of the fresh air fan 30 and the rotation axis of the return air fan 40 are parallel to each other and extend along the second direction (e.g., the front-rear direction as shown in Figure 4 and Figure 5 . That is, the rotation axis of the fresh air fan 30 and the rotation axis of the return air fan 40 are perpendicular to the length direction of the heat exchange core 20 and a side wall of the housing 10.

[0158] The fresh air fan 30 and the return air fan 40 can be axial-inlet and radial-outlet centrifugal fans, because the axial dimension of the centrifugal fan is smaller than the radial dimension.

[0159] Therefore, by arranging the rotation axis of the fresh air fan 30 and the rotation axis of the return air fan 40 to extend along the second direction, i.e., arranging the fresh air fan 30 and the return air fan 40 horizontally, the size of the fresh air fan 30 and the return air fan 40 in the second direction is reduced, and the size of the heat exchange device 100 in the horizontal plane is reduced.

[0160] Please refer to Figure 12 and Figure 13 In some embodiments, the first air outlet side duct wall 1212c of the first air outlet cavity 1212 extends along the first direction, and the first air outlet side duct wall 1212c is arranged opposite to the first air outlet face 201b in the second direction, and the first air outlet side duct wall 1212c is located between the first heat exchange cavity 1212b and the return air fan accommodating cavity 1222a.

[0161] In some embodiments, the first air outlet side duct wall 1212c is at least partially curved in the first direction towards the fresh air fan accommodating cavity 1212a, so as to guide the air in the first heat exchange cavity 1212b to flow into the fresh air fan accommodating cavity 1212a. For example, the first air outlet side duct wall 1212c has a first air outlet guide face 1212d, and the first air outlet guide face 1212d is curved in the first direction towards the fresh air fan accommodating cavity 1212a.

[0162] When the fresh air fan 30 is working, the air in the first air inlet cavity 1211 of the fresh air duct 121 entering from the fresh air inlet 1101 can enter the heat exchange core 20 from the first air inlet face 201a (for example, enter the first heat exchange flow channel of the heat exchange core 20), and after heat exchange with the heat exchange core 20, flow to the first air outlet cavity 1212 of the fresh air duct 121 from the first air outlet face 201b, specifically, sequentially flow through the first heat exchange cavity 1212b and the fresh air fan containing cavity 1212a of the first air outlet cavity 1212, and finally be discharged from the fresh air outlet 1102. In this process, the first air outlet flow guide face 1212d can guide the air in the first heat exchange cavity 1212b to the fresh air fan containing cavity 1212a in the first direction, so as to reduce vortex or rotational flow, reduce the air resistance in the fresh air duct 121, and further reduce the working noise of the whole machine.

[0163] And / or, the first air outlet side duct wall 1212c is at least partially curved in the third direction towards the direction close to the second air outlet face 202b, for guiding the air in the second heat exchange cavity 1222b to flow into the return air fan containing cavity 1222a.

[0164] When the return air fan 40 is working, the air in the second air inlet cavity 1221 of the return air duct 122 entering from the return air inlet 1103 can enter the heat exchange core 20 from the second air inlet face 202a (for example, enter the second heat exchange flow channel of the heat exchange core 20), and after heat exchange with the heat exchange core 20, flow to the second air outlet cavity 1222 of the return air duct 122 from the second air outlet face 202b, specifically, sequentially flow through the second heat exchange cavity 1222b and the return air fan containing cavity 1222a of the second air outlet cavity 1222, and finally be discharged from the exhaust air outlet 1104. In this process, the first air outlet side duct wall 1212c can guide the air in the second heat exchange cavity 1222b to the return air fan containing cavity 1222a in the third direction, so as to reduce vortex or rotational flow, reduce the air resistance in the return air duct 122, and further reduce the working noise of the whole machine.

[0165] Please refer again to Figure 9 And Figure 10 In some embodiments, the second air outlet cavity 1222 has a second air outlet side duct wall 1222c extending in the first direction, the second air outlet side duct wall 1222c is arranged opposite to the second air outlet face 202b in the second direction, and the second air outlet side duct wall 1222c is located between the second heat exchange cavity 1222b and the fresh air fan containing cavity 1212a.

[0166] The second air outlet side duct wall 1222c is at least partially curved in the first direction towards the direction close to the return air fan containing cavity 1222a, for guiding the air in the second heat exchange cavity 1222b to flow into the return air fan containing cavity 1222a.

[0167] When the return air fan 40 is working, the air entering the second air inlet cavity 1221 of the return air duct 122 from the return air inlet 1103 can enter the heat exchange core 20 from the second air inlet face 202a (for example, enter the second heat exchange flow channel of the heat exchange core 20), and after heat exchange with the heat exchange core 20, flow to the second air outlet cavity 1222 of the return air duct 122 from the second air outlet face 202b, specifically, sequentially flow through the second heat exchange cavity 1222b and the return air fan accommodating cavity 1222a of the second air outlet cavity 1222, and finally be discharged from the exhaust air outlet 1104. In this process, the second air outlet flow guide face 1222d can guide the air in the second heat exchange cavity 1222b to the return air fan accommodating cavity 1222a along the first direction, so as to reduce vortex or rotational flow, reduce the air resistance in the return air duct 122, and further reduce the working noise of the whole machine.

[0168] And / or, the second air outlet side duct wall 1222c is at least partially curved along the third direction towards the direction close to the first air outlet face 201b, for guiding the air in the first heat exchange cavity 1212b to flow into the fresh air fan accommodating cavity 1212a.

[0169] When the fresh air fan 30 is working, the air entering the first air inlet cavity 1211 of the fresh air duct 121 from the fresh air inlet 1101 can enter the heat exchange core 20 from the first air inlet face 201a (for example, enter the first heat exchange flow channel of the heat exchange core 20), and after heat exchange with the heat exchange core 20, flow to the first air outlet cavity 1212 of the fresh air duct 121 from the first air outlet face 201b, specifically, sequentially flow through the first heat exchange cavity 1212b and the fresh air fan accommodating cavity 1212a of the first air outlet cavity 1212, and finally be discharged from the fresh air outlet 1102. In this process, the part of the second air outlet side duct wall 1222c close to the first air outlet face 201b can guide the air in the first heat exchange cavity 1212b to the fresh air fan accommodating cavity 1212a along the third direction, so as to reduce vortex or rotational flow, reduce the air resistance in the fresh air duct 121, and further reduce the working noise of the whole machine.

[0170] Please refer again to Figure 1 And Figure 2 In some embodiments, the shell 10 includes a housing 11 and a duct component 12, the fresh air inlet 1101, the fresh air outlet 1102, the return air inlet 1103 and the exhaust air outlet 1104 are provided on the housing 11, the duct component 12 is provided in the housing 11, and the duct component 12 defines the fresh air duct 121 and the return air duct 122.

[0171] The shell 11 can be a cuboid structure, the shell 11 includes a bottom wall 1141, a top wall 1142 and four side walls 1143, the fresh air inlet 1101 and the exhaust air outlet 1104 are arranged on one of the side walls 1143, and the fresh air outlet 1102 and the return air outlet 1103 are arranged on another side wall 1143. Hooks 113 can be arranged on the side walls 1143 to hang the heat exchange device 100 on the ceiling. The shell 11 serves as an appearance part of the heat exchange device 100, which can protect the air duct component 12, the fresh air fan 30, the return air fan 40, the heat exchange core 20 and other structures from being damaged, and can integrate all the structures for easy assembly and disassembly.

[0172] The fresh air inlet 1101 and the exhaust air outlet 1104 can be provided with dampers. When the heat exchange device 100 is working, the dampers can be opened; when the heat exchange device 100 is stopped, the dampers can be closed. By setting the dampers, the opening and closing of the dampers can be controlled according to the state of the heat exchange device 100, so as to avoid the entry of mosquitoes, sundries and other outdoor objects into the heat exchange device 100 through the fresh air inlet 1101 and the exhaust air outlet 1104 when the heat exchange device 100 is stopped.

[0173] The shape of the air duct component 12 matches the shape of the shell 11. The air duct component 12 is adapted to define a fresh air duct 121 and a return air duct 122. Specifically, a first air inlet 1201 and a second air outlet 1204 are arranged on one side wall of the air duct component 12, and a first air outlet 1202 and a second air inlet 1203 are arranged on another side wall, the fresh air duct 121 communicates the first air inlet 1201 and the first air outlet 1202, and the return air duct 122 communicates the second air inlet 1203 and the second air outlet 1204.

[0174] The first air inlet 1201 corresponds to and communicates with the position of the fresh air inlet 1101, the first air outlet 1202 corresponds to and communicates with the position of the fresh air outlet 1102, the second air inlet 1203 corresponds to and communicates with the position of the return air outlet 1103, and the second air outlet 1204 corresponds to and communicates with the position of the exhaust air outlet 1104, so that the fresh air duct 121 communicates the fresh air inlet 1101 and the fresh air outlet 1102, and the return air duct 122 communicates the return air outlet 1103 and the exhaust air outlet 1104.

[0175] The fresh air inlet 1101, the fresh air outlet 1102, the return air inlet 1103, and the exhaust air outlet 1104 can each be circular, the first air inlet 1201 can be circular corresponding to the position and shape of the fresh air inlet 1101, the second air inlet 1203 can be circular corresponding to the position and shape of the return air inlet 1103, the shape of the first air outlet 1202 can be quadrilateral corresponding to the shape of the volute outlet of the fresh air fan 30, the shape of the second air outlet 1204 can be quadrilateral corresponding to the shape of the volute outlet of the return air fan 40, and in a plane perpendicular to the first direction, the projection of the first air outlet 1202 is located within the projection of the fresh air outlet 1102, and the projection of the second air outlet 1204 is located within the projection of the exhaust air outlet 1104.

[0176] In addition, the line connecting the center of the first air inlet 1201 and the center of the second air outlet 1204 can not be on the same horizontal line, and the line connecting the center of the second air inlet 1203 and the center of the first air outlet 1202 can not be on the same horizontal line, facilitating the arrangement of the fresh air duct 121 and the return air duct 122.

[0177] The duct component 12 also defines an accommodation space 1205, which is located between the first air inlet cavity 1211 and the first air outlet cavity 1212, and which is located between the second air inlet cavity 1221 and the second air outlet cavity 1222. The length direction of the accommodation space 1205 extends along the first direction, the first air inlet cavity 1211 and the second air inlet cavity 1221 are located on one side of the length direction of the accommodation space 1205, and the first air outlet cavity 1212 and the second air outlet cavity 1222 are located on the other side of the length direction of the accommodation space 1205.

[0178] Please refer to Figures 8-10 In some embodiments, the duct component 12 is a one-piece foamed piece. For example, the duct component 12 can be EPP foam (polypropylene plastic foamed material), so that the duct component 12 has the advantages of light weight, good heat insulation effect, good sound absorption effect, etc. For another example, the duct component 12 can be EPS foam (foamed polystyrene), so that the duct component 12 has the advantages of strong anti-seismic and anti-pressure capacity, good elasticity, etc.

[0179] In this way, by setting the duct component 12 as a one-piece foamed piece, on the one hand, the number of components can be reduced, and the connection steps of multiple structures can be omitted, thereby the production cost can be reduced and the production efficiency can be improved, and on the other hand, the structural reliability of the duct component 12 can be improved, thereby the use reliability of the heat exchange device 100 can be improved.

[0180] In addition, by setting the duct component 12 as a one-piece foamed piece, the mass of the duct component 12 can be reduced, the noise reduction, heat resistance, and flame retardation effects can be improved, the time and cost for pasting thermal insulation cotton can be avoided, and the manufacturing efficiency can be improved and the cost can be reduced.

[0181] Please refer to this again. Figures 8-10 In some embodiments, the air duct component 12 includes a frame 123 and an air outlet partition 124, the air outlet partition 124 being disposed within the frame 123, and the air outlet partition 124 and the frame 123 defining at least a portion of the first air outlet cavity 1212 and the second air outlet cavity 1222.

[0182] In one embodiment where a first air inlet 1201, a first air outlet 1202, a second air inlet 1203, and a second air outlet 1204 are provided on the air duct component 12, the frame 123 includes a first side plate 1231 and a second side plate 1232. The first side plate 1231 and the second side plate 1232 are arranged opposite to each other in a first direction. The first air inlet 1201 and the second air outlet 1204 are provided on the first side plate 1231 and arranged in a second direction. The second air inlet 1203 and the first air outlet 1202 are provided on the second side plate 1232 and arranged in a second direction.

[0183] The air outlet separator 124 is located in the area along the second direction within the frame 123 (e.g., Figure 10 The heat exchange core 20 and the air outlet partition 124 are arranged in the second direction in the rear part of the frame 123, and the heat exchange core 20 and the air outlet partition 124 cooperate with each other.

[0184] Specifically, the first air outlet cavity 1212 of the fresh air duct 121 includes a first heat exchange cavity 1212b and a fresh air fan receiving cavity 1212a. The frame 123 and the air outlet separator 124 define the fresh air fan receiving cavity 1212a, and the frame 123, the air outlet separator 124, and the heat exchange core 20 define the first heat exchange cavity 1212b. The second air outlet cavity 1222 of the return air duct 122 includes a second heat exchange cavity 1222b and a return air fan receiving cavity 1222a. The frame 123 and the air outlet separator 124 define the return air fan receiving cavity 1222a, and the frame 123, the air outlet separator 124, and the heat exchange core 20 define the second heat exchange cavity 1222b.

[0185] In some embodiments, the air duct component 12 further includes an air inlet separator 125 disposed within the frame 123, and the air inlet separator 125 and the air outlet separator 124 are arranged in a second direction, the air inlet separator 125 and the frame 123 defining at least a portion of the first air inlet cavity 1211 and the second air inlet cavity 1221.

[0186] For example, the frame 123 is closed on all four sides, with one end of the frame 123 closed along a third direction and the other end having an opening, and the air outlet partition 124 is located in the area inside the frame 123 along one side of the second direction (e.g.Figure 10 The air inlet partition 125 is located in the area on the other side of the frame 123 along the second direction (for example, the area in the rear of the frame 123) Figure 10 The heat exchange core 20 is located between the air outlet partition 124 and the air inlet partition 125 in the second direction.

[0187] Specifically, the frame 123 and the air outlet partition 124 can define a fresh air fan accommodating cavity 1212a, and the frame 123, the air outlet partition 124 and the heat exchange core 20 can define a first heat exchange cavity 1212b; the frame 123 and the air outlet partition 124 can define a return air fan accommodating cavity 1222a, and the frame 123, the air outlet partition 124 and the heat exchange core 20 can define a second heat exchange cavity 1222b; the frame 123, the air inlet partition 125 and the heat exchange core 20 can define a first air inlet cavity 1211 of the fresh air duct 121 and a second air inlet cavity 1221 of the return air duct 122.

[0188] In the above technical solution, by setting the air duct component 12 to include the frame 123, the air outlet partition 124 and the air inlet partition 125, the air outlet partition 124 and the air inlet partition 125 are matched with the heat exchange core 20, thereby partitioning the inner cavity of the frame 123, forming the fresh air duct 121 and the return air duct 122 which are not communicated with each other, and making the heat exchange device 100 have the air exchange effect of passing fresh air and discharging turbid gas.

[0189] Please refer to Figures 8-10 and further refer to Figures 12-14 In some embodiments, the air outlet partition 124 includes a first air outlet partition plate 1241, the first air outlet partition plate 1241 is arranged opposite to the first air outlet surface 201b in the second direction, and the first heat exchange cavity 1212b is at least partially located between the first air outlet partition plate 1241 and the first air outlet surface 201b.

[0190] The air outlet partition 124 includes a second air outlet partition plate 1242, the second air outlet partition plate 1242 and the first air outlet partition plate 1241 are arranged in the first direction, and the second air outlet partition plate 1242 is arranged staggered with the first air outlet partition plate 1241 in the third direction, the second air outlet partition plate 1242 is arranged opposite to the second air outlet surface 202b in the second direction, and the second heat exchange cavity 1222b is at least partially located between the second air outlet partition plate 1242 and the second air outlet surface 202b.

[0191] The air outlet partition 124 comprises a third air outlet partition plate 1243 extending along the second direction, and the third air outlet partition plate 1243 is connected between the first air outlet partition plate 1241 and the second air outlet partition plate 1242. For example, one end of the third air outlet partition plate 1243 along the third direction is connected with the end wall of the frame 123, and the other end of the third air outlet partition plate 1243 along the third direction extends to the opening of the frame 123, one end of the third air outlet partition plate 1243 along the second direction is connected with the side wall of the frame 123, and the other end of the third air outlet partition plate 1243 along the second direction is connected with the joint between the first air outlet partition plate 1241 and the second air outlet partition plate 1242.

[0192] In the embodiment in which the frame 123 comprises the first side plate 1231 and the second side plate 1232, the first air inlet 1201 and the second air outlet 1204 are arranged on the first side plate 1231, and the second air inlet 1203 and the first air outlet 1202 are arranged on the second side plate 1232, the first air outlet partition plate 1241 is connected with the first side plate 1231 at one end along the first direction, the second air outlet partition plate 1242 is connected with the second side plate 1232 at one end along the first direction, and the third air outlet partition plate 1243 is connected with the frame 123 at one end along the second direction and connected between the first air outlet partition plate 1241 and the second air outlet partition plate 1242 at the other end along the second direction.

[0193] In the above technical solution, by arranging the air outlet partition 124 as the first air outlet partition plate 1241, the second air outlet partition plate 1242 and the third air outlet partition plate 1243, which are matched with the heat exchange core 20, the inner cavity of the frame 123 is partitioned to divide the first heat exchange cavity 1212b and the fresh air fan accommodating cavity 1212a of the fresh air duct 121, and the second heat exchange cavity 1222b and the return air fan accommodating cavity 1222a of the return air duct 122, so that the heat exchange device 100 has the air exchange effect of passing fresh air and discharging dirty air.

[0194] Please refer to Figure 13 In some embodiments, the first air outlet partition plate 1241 and the third air outlet partition plate 1243 are connected in a circular arc transition to form a first air outlet flow guide surface 1212d at the connection position of the two, which is used to guide the air in the first heat exchange cavity 1212b to flow into the fresh air fan accommodating cavity 1212a.

[0195] Specifically, in the embodiment in which the frame 123 comprises the first side plate 1231 and the second side plate 1232, the first air inlet 1201 and the second air outlet 1204 are arranged on the first side plate 1231, and the second air inlet 1203 and the first air outlet 1202 are arranged on the second side plate 1232, the first air outlet partition plate 1241 has a first air outlet flow guide surface 1212d on the side facing the containing space 1205, and the first air outlet flow guide surface 1212d gradually moves away from the containing space 1205 from the first side plate 1231 to the second side plate 1232 along the first direction.

[0196] When the fresh air fan 30 is working, the air in the first air inlet cavity 1211 of the fresh air duct 121 entering from the fresh air inlet 1101 can enter the heat exchange core 20 from the first air inlet face 201a (for example, enter the first heat exchange flow channel of the heat exchange core 20), and after heat exchange with the heat exchange core 20, flow to the first air outlet cavity 1212 of the fresh air duct 121 from the first air outlet face 201b, specifically, sequentially flow through the first heat exchange cavity 1212b and the fresh air fan containing cavity 1212a of the first air outlet cavity 1212, and finally be discharged from the fresh air outlet 1102. In this process, the first air outlet flow guide face 1212d can guide the air in the first heat exchange cavity 1212b to the fresh air fan containing cavity 1212a along the first direction, so as to reduce vortex or rotational flow, reduce the air resistance in the fresh air duct 121, and further reduce the working noise of the whole machine.

[0197] Please refer to Figures 8-10 In some embodiments, the second air outlet partition plate 1242 and the third air outlet partition plate 1243 are connected in a circular arc transition manner to form a second air outlet flow guide face 1222d at the connection position of the two, for guiding the air in the second heat exchange cavity 1222b to flow into the return air fan containing cavity 1222a.

[0198] Specifically, in the embodiment in which the frame 123 includes the first side plate 1231 and the second side plate 1232, the first air inlet 1201 and the second air outlet 1204 are arranged on the first side plate 1231, and the second air inlet 1203 and the first air outlet 1202 are arranged on the second side plate 1232, the second air outlet partition plate 1242 has a second air outlet flow guide face 1222d on the side facing the containing space 1205, and the second air outlet flow guide face 1222d gradually moves away from the containing space 1205 along the first direction from the second side plate 1232 to the first side plate 1231.

[0199] When the return air fan 40 is working, the air in the second air inlet cavity 1221 of the return air duct 122 entering from the return air inlet 1103 can enter the heat exchange core 20 from the second air inlet face 202a (for example, enter the second heat exchange flow channel of the heat exchange core 20), and after heat exchange with the heat exchange core 20, flow to the second air outlet cavity 1222 of the return air duct 122 from the second air outlet face 202b, specifically, sequentially flow through the second heat exchange cavity 1222b and the return air fan containing cavity 1222a of the second air outlet cavity 1222, and finally be discharged from the exhaust air outlet 1104. In this process, the second air outlet flow guide face 1222d can guide the air in the second heat exchange cavity 1222b to the return air fan containing cavity 1222a along the first direction, so as to reduce vortex or rotational flow, reduce the air resistance in the return air duct 122, and further reduce the working noise of the whole machine.

[0200] Please refer to Figure 15 andFigure 16 In some embodiments, the portion of the first air outlet partition 1241 close to the second air outlet surface 202b is curved towards the second air outlet surface 202b, i.e., the portion of the first air outlet partition 1241 close to the second air outlet surface 202b is in an arc structure, for guiding the air in the second heat exchange cavity 1222b to flow into the return air fan accommodating cavity 1222a.

[0201] For example, the first air outlet partition 1241 is arranged opposite to the first air outlet surface 201b of the heat exchange core 20, one end of the first air outlet partition 1241 along the third direction is connected with the frame 123, the other end of the first air outlet partition 1241 along the third direction is matched with the heat exchange core 20, the first air outlet partition 1241 can separate the first heat exchange cavity 1212b of the first air outlet cavity 1212 and the return air fan accommodating cavity 1222a of the second air outlet cavity 1222, the other end of the first air outlet partition 1241 along the third direction is curvedly arranged towards the second air outlet surface 202b, specifically, the portion of the first air outlet partition 1241 away from the frame 123 on the side towards the first heat exchange cavity 1212b is curvedly arranged towards the first air outlet surface 201b of the heat exchange core 20, and the portion of the first air outlet partition 1241 away from the frame 123 on the side towards the return air fan accommodating cavity 1222a is curvedly arranged towards the second air outlet surface 202b of the heat exchange core 20.

[0202] When the return air fan 40 works, the air in the second air inlet cavity 1221 of the return air duct 122 entering from the return air inlet 1103 can enter the heat exchange core 20 from the second air inlet surface 202a (for example, enter the second heat exchange flow channel of the heat exchange core 20), exchange heat with the heat exchange core 20, and then flow to the second air outlet cavity 1222 of the return air duct 122 from the second air outlet surface 202b, specifically, sequentially flow through the second heat exchange cavity 1222b and the return air fan accommodating cavity 1222a of the second air outlet cavity 1222, and finally be discharged from the return air outlet 1104. In this process, the portion of the first air outlet partition 1241 close to the second air outlet surface 202b can guide the air in the second heat exchange cavity 1222b to the return air fan accommodating cavity 1222a along the third direction, so as to reduce the vortex or rotational flow, reduce the air resistance in the return air duct 122, and further reduce the working noise of the whole machine.

[0203] Please refer to Figure 17 and Figure 18 In some embodiments, the portion of the second air outlet partition 1242 close to the first air outlet surface 201b is curved towards the first air outlet surface 201b, for guiding the air in the first heat exchange cavity 1212b to flow into the fresh air fan accommodating cavity 1212a.

[0204] For example, the second air outlet partition plate 1242 is arranged opposite to the second air outlet surface 202b of the heat exchange core 20, and an end of the second air outlet partition plate 1242 close to the frame 123 is matched with the heat exchange core 20 along the third direction. The second air outlet partition plate 1242 can separate the second heat exchange cavity 1222b of the second air outlet cavity 1222 from the fresh air fan accommodating cavity 1212a of the first air outlet cavity 1212. The end of the second air outlet partition plate 1242 close to the frame 123 is arranged to be curved towards the first air outlet surface 201b. Specifically, the part of the second air outlet partition plate 1242 close to the frame 123 on the side facing the second heat exchange cavity 1222b is arranged to be curved towards the second air outlet surface 202b of the heat exchange core 20, and the part of the second air outlet partition plate 1242 close to the frame 123 on the side facing the fresh air fan accommodating cavity 1212a is arranged to be curved towards the first air outlet surface 201b of the heat exchange core 20.

[0205] When the fresh air fan 30 is working, the air in the first air inlet cavity 1211 of the fresh air duct 121 entering from the fresh air inlet 1101 can enter the heat exchange core 20 from the first air inlet surface 201a (for example, enter the first heat exchange flow channel of the heat exchange core 20), exchange heat with the heat exchange core 20, and then flow to the first air outlet cavity 1212 of the fresh air duct 121 from the first air outlet surface 201b. Specifically, the air flows through the first heat exchange cavity 1212b and the fresh air fan accommodating cavity 1212a of the first air outlet cavity 1212 in sequence, and finally is discharged from the fresh air outlet 1102. In this process, the part of the second air outlet partition plate 1242 close to the first air outlet surface 201b can guide the air in the first heat exchange cavity 1212b to the fresh air fan accommodating cavity 1212a along the third direction, so as to reduce the vortex or rotational flow, reduce the air resistance in the fresh air duct 121, and further reduce the working noise of the whole machine.

[0206] Please refer again to Figure 17 and Figure 18 In some embodiments, the frame 123 further comprises an end plate 1234, and two ends of the end plate 1234 along the first direction are respectively connected with an end of the first side plate 1231 and an end of the second side plate 1232 along the third direction.

[0207] The air inlet partition 125 comprises a first air inlet partition plate 1251, and two ends of the first air inlet partition plate 1251 along the first direction are respectively connected with the first side plate 1231 and the second side plate 1232. The first air inlet cavity 1211 is at least partially located on the side of the first air inlet partition plate 1251 away from the end plate 1234, and the second air inlet cavity 1221 is at least partially located between the first air inlet partition plate 1251 and the end plate 1234.

[0208] The first air inlet partition 1251, in cooperation with the frame 123 and the heat exchange core 20, can define at least a part of the first air inlet cavity 1211 and the second air inlet cavity 1221. The first air inlet partition 1251 can include the second air inlet side air duct wall 1211b and the third air inlet side air duct wall 1211e in the above-described embodiments to achieve the flow guiding effect.

[0209] Please refer again to Figure 17 and Figure 18 In some embodiments, the frame 123 further includes a third side plate 1233, which is connected to the first side plate 1231 and the second side plate 1232 at two ends in the first direction respectively.

[0210] The air inlet partition 125 includes a second air inlet partition 1252, which is arranged opposite to the third side plate 1233 in the second direction and connected to the side of the first air inlet partition 1252 close to the third side plate 1233. The second air inlet cavity 1221 is at least partially located between the second air inlet partition 1252 and the third side plate 1233.

[0211] The second air inlet partition 1252, in cooperation with the frame 123 and the heat exchange core 20, can define at least a part of the first air inlet cavity 1211 and the second air inlet cavity 1221. The second air inlet partition 1252 can include the first air inlet side air duct wall 1211a in the above-described embodiments to achieve the flow guiding effect.

[0212] For example, at least a part of the second air inlet partition 1252 forms the first air inlet side air duct wall 1211a, at least a part of the second air inlet partition 1252 forms the second air inlet side air duct wall 1211b and the third air inlet side air duct wall 1211e. At least a part of the first air outlet partition 1241 forms the first air outlet side air duct wall 1212c, and at least a part of the second air outlet partition 1242 forms the second air outlet side air duct wall 1222c.

[0213] Please refer again to 15- Figure 18 In some embodiments, the junction of the first air outlet surface 201b and the second air outlet surface 202b has a first corner 21, and the position of the air outlet partition 124 close to the first corner 21 has a first limiting groove 1240, which cooperates with the first corner 21.

[0214] Since the heat exchange core 20 is located between the air outlet partition 124 and the air inlet partition 125 in the second direction, the air outlet partition 124, in cooperation with the heat exchange core 20, can limit the degree of freedom of the heat exchange core 20 in the second direction.

[0215] For example, the first limiting groove 1240 has two first groove side walls arranged adjacently and at an angle, one of the two first groove side walls is attached to the first air outlet surface 201b, and the other of the two first groove side walls is attached to the second air outlet surface 202b. The two first groove side walls can not only limit the degree of freedom of the heat exchange core 20 in the second direction, but also limit the degree of freedom of the heat exchange core 20 in the third direction.

[0216] Therefore, by arranging the first limiting groove 1240 on the air outlet partition 124, and by cooperating the first limiting groove 1240 with the first corner 21 of the heat exchange core 20, the heat exchange core 20 can be limited in multiple directions, the installation reliability and stability of the heat exchange core 20 are ensured, and the use reliability of the heat exchange device 100 is improved.

[0217] Referring to Figures 15-18 In some embodiments, the junction of the first air inlet surface 201a and the second air inlet surface 202a has a second corner 22, and the position of the air inlet partition 125 close to the second corner 22 has a second limiting groove 1250, and the second limiting groove 1250 cooperates with the second corner 22.

[0218] Since the heat exchange core 20 is located between the air outlet partition 124 and the air inlet partition 125 in the second direction, the air inlet partition 125 cooperates with the heat exchange core 20 to limit the degree of freedom of the heat exchange core 20 in the second direction.

[0219] For example, the second limiting groove 1250 has two second groove side walls arranged adjacently and at an angle, one of the two second groove side walls is attached to the first air inlet surface 201a, and the other of the two second groove side walls is attached to the second air inlet surface 202a. The two second groove side walls can not only limit the degree of freedom of the heat exchange core 20 in the second direction, but also limit the degree of freedom of the heat exchange core 20 in the third direction.

[0220] Therefore, by arranging the second limiting groove 1250 on the air inlet partition 125, and by cooperating the second limiting groove 1250 with the second corner 22 of the heat exchange core 20, the heat exchange core 20 can be limited in multiple directions, the installation reliability and stability of the heat exchange core 20 are ensured, and the use reliability of the heat exchange device 100 is improved.

[0221] In some embodiments, the heat exchange device 100 further comprises a detection member, which can be used to detect information of indoor air, for example, the detection member can detect at least one of temperature, humidity, CO2, PM2.5 and TVOC of indoor air, so that the working time, start-up and shutdown time, etc. of the heat exchange device 100 can be controlled according to the detection result of the detection member.

[0222] In the description of the disclosure, the description referring to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the disclosure. In the description of the disclosure, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0223] Although the embodiments of the disclosure have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, alternatives and variations can be made to the embodiments without departing from the principles and spirit of the disclosure, and the scope of the disclosure is defined by the claims and their equivalents.

Claims

1. A heat exchange device, comprising: a housing (10) having a fresh air duct (121) and a return air duct (122) therein, the housing (10) being provided with a fresh air inlet (1101), a fresh air outlet (1102), a return air inlet (1103) and an exhaust air outlet (1104), the fresh air duct (121) communicating the fresh air inlet (1101) and the fresh air outlet (1102), the return air duct (122) communicating the return air inlet (1103) and the exhaust air outlet (1104); a heat exchange core (20) arranged in the housing (10), air flowing through the fresh air duct (121) and the return air duct (122) performing heat exchange in the heat exchange core (20); a fresh air fan (30) rotatably arranged in the fresh air duct (121) and located between the heat exchange core (20) and the fresh air outlet (1102) in the air flow direction; a return air fan (40) rotatably arranged in the return air duct (122) and located between the heat exchange core (20) and the exhaust air outlet (1104) in the air flow direction; characterized in that the fresh air duct (121) comprises a first air inlet cavity (1211) and a first air outlet cavity (1212), the return air duct (122) comprises a second air inlet cavity (1221) and a second air outlet cavity (1222), the heat exchange core (20) is located between the first air inlet cavity (1211) and the first air outlet cavity (1212), and between the second air inlet cavity (1221) and the second air outlet cavity (1222); a length direction of the heat exchange core (20) extends along a first direction, the first air inlet cavity (1211) and the second air inlet cavity (1221) are located on one side of the length direction of the heat exchange core (20), the first air outlet cavity (1212) and the second air outlet cavity (1222) are located on the other side of the length direction of the heat exchange core (20) and arranged in the length direction of the heat exchange core (20), the fresh air fan (30) is arranged in the first air outlet cavity (1212), and the return air fan (40) is arranged in the second air outlet cavity (1222); the heat exchange device further comprises a fresh air filter (50) arranged in the first air inlet cavity (1211); wherein the first air inlet cavity (1211) has a first air inlet side duct wall (1211a) located upstream of the fresh air filter (50) in the air flow direction and arranged opposite the fresh air filter (50) in a second direction perpendicular to the first direction; the first air inlet side duct wall (1211a) gradually approaches the fresh air filter (50) in the first direction away from the fresh air inlet (1101) at least in part.

2. The heat exchange device of claim 1, wherein The distance between the first air inlet side air duct wall (1211a) and the fresh air filter (50) in the second direction is X at one end close to the fresh air inlet (1101), and the distance between the first air inlet side air duct wall (1211a) and the fresh air filter (50) in the second direction is Y at one end away from the fresh air inlet (1101), and X / Y is 4.5-7; And / or, the distance between the first air inlet side air duct wall (1211a) and the fresh air filter (50) in the second direction is greater than or equal to 15mm at one end close to the fresh air inlet (1101).

3. The heat exchange device of claim 1, wherein The first air inlet cavity (1211) also has a second air inlet side air duct wall (1211b), which is located between the fresh air filter (50) and the first air inlet side air duct wall (1211a) in the second direction; At least a part of the second air inlet side air duct wall (1211b) gradually approaches the middle position of the first air inlet cavity (1211) in the third direction in the direction away from the fresh air inlet (1101) in the first direction, and the first direction, the second direction and the third direction are perpendicular to each other.

4. The heat exchange device of claim 3, wherein The second air inlet side air duct wall (1211b) comprises a first part (1211c) and a second part (1211d), and the first part (1211c) is located between the fresh air inlet (1101) and the second part (1211d) in the first direction. The first part (1211c) gradually approaches the middle position of the first air inlet cavity (1211) in the third direction in the direction away from the fresh air inlet (1101) in the first direction, and the second part (1211d) extends along the first direction.

5. The heat exchange device of claim 4, wherein The inclination angle of the first part (1211c) relative to the plane determined by the first direction and the second direction is less than 0° and less than 30°, or equal to 30°; And / or, the length of the first part (1211c) in the first direction is L1, and the length of the second air inlet side air duct wall (1211b) in the first direction is L, and L1 / L is 0.4-0.

6.

6. The heat exchange device of claim 4, wherein The first air inlet side air duct wall (1211a) and the second air inlet side air duct wall (1211b) are connected, and the first air inlet cavity (1211) and the second air inlet cavity (1221) are at least partially separated by the first air inlet side air duct wall (1211a) and the second air inlet side air duct wall (1211b); And / or, the first air inlet cavity (1211) also has a third air inlet side air duct wall (1211e), which extends along the first direction and is connected to the side of the second air inlet side air duct wall (1211b) away from the first air inlet side air duct wall (1211a). The third air inlet side air duct wall (1211e) is provided with first positioning ribs (1211f) and second positioning ribs (1211g) arranged at intervals in the second direction, and the fresh air filter (50) is located between the first positioning ribs (1211f) and the second positioning ribs (1211g).

7. The heat exchange device according to any one of claims 1 to 6, characterized in that, The peripheral wall of the heat exchange core (20) has a first air inlet face (201a), a first air outlet face (201b), a second air inlet face (202a) and a second air outlet face (202b) extending in the first direction, the first air inlet face (201a) and the second air outlet face (202b) are oppositely arranged and at an angle in the second direction, the first air inlet face (201a) and the second air inlet face (202a) are oppositely arranged and at an angle in the third direction, the first air outlet face (201b) and the second air inlet face (202a) are oppositely arranged and at an angle in the second direction, and the first air outlet face (201b) and the second air outlet face (202b) are oppositely arranged and at an angle in the third direction, the first direction, the second direction and the third direction are perpendicular to each other in pairs; The first air inlet cavity (1211) is located between the fresh air inlet (1101) and the first air inlet face (201a), the first air outlet cavity (1212) is located between the fresh air outlet (1102) and the first air outlet face (201b), the return air duct (122) includes a second air inlet cavity (1221) and a second air outlet cavity (1222), the second air inlet cavity (1221) is located between the return air inlet (1103) and the second air inlet face (202a), and the second air outlet cavity (1222) is located between the exhaust air outlet (1104) and the second air outlet face (202b).

8. The heat exchange device of claim 7, wherein The first air outlet cavity (1212) includes a fresh air fan accommodating cavity (1212a) and a first heat exchange cavity (1212b) arranged in the second direction, and the second air outlet cavity (1222) includes a return air fan accommodating cavity (1222a) and a second heat exchange cavity (1222b) arranged in the second direction. The fresh air fan accommodating cavity (1212a) and the return air fan accommodating cavity (1222a) are arranged in the first direction, in the second direction, the first heat exchange cavity (1212b) is located between the first air outlet face (201b) and the fresh air fan accommodating cavity (1212a), and the second heat exchange cavity (1222b) is located between the second air outlet face (202b) and the return air fan accommodating cavity (1222a).

9. The heat exchange device of claim 8, wherein, The rotation axis of the fresh air fan (30) and the rotation axis of the return air fan (40) are parallel to each other and extend in the second direction.

10. The heat exchange device of claim 8, wherein, The first air outlet cavity (1212) has a first air outlet side air duct wall (1212c) extending along the first direction, which is arranged opposite to the first air outlet surface (201b) in the second direction and between the first heat exchange cavity (1212b) and the return air fan accommodating cavity (1222a); wherein the first air outlet side air duct wall (1212c) is at least partially curved along the first direction towards the new air fan accommodating cavity (1212a), for guiding the air in the first heat exchange cavity (1212b) to flow into the new air fan accommodating cavity (1212a); and / or the first air outlet side air duct wall (1212c) is at least partially curved along the third direction towards the second air outlet surface (202b), for guiding the air in the second heat exchange cavity (1222b) to flow into the return air fan accommodating cavity; And / or the second air outlet cavity (1222) has a second air outlet side air duct wall (1222c) extending along the first direction, which is arranged opposite to the second air outlet surface (202b) in the second direction and between the second heat exchange cavity (1222b) and the new air fan accommodating cavity (1212a); wherein the second air outlet side air duct wall (1222c) is at least partially curved along the first direction towards the return air fan accommodating cavity (1222a), for guiding the air in the second heat exchange cavity (1222b) to flow into the return air fan accommodating cavity (1222a); and / or the second air outlet side air duct wall (1222c) is at least partially curved along the third direction towards the first air outlet surface (201b), for guiding the air in the first heat exchange cavity (1212b) to flow into the new air fan accommodating cavity (1212a).

Images