Wall-mounted air conditioner

Abstract

An indoor unit of the wall-mounted air conditioner comprises a machine shell which is provided with a machine shell air inlet and a machine shell air outlet, a machine shell containing cavity is formed, and the machine shell comprises a top plate, an air inlet, an air outlet and an air outlet; a front panel; a back plate; the heat exchanger is arranged in the housing accommodating cavity; the cross-flow fan is located on the side, away from the air inlet of the shell, of the heat exchanger. The heat exchanger comprises a first fold arranged between the front panel and the cross-flow fan; the lower end of the second fold is connected with the upper end of the first fold, and the upper end of the second fold inclines towards the side close to the back plate relative to the lower end of the second fold; the upper end of the third fold is connected with the upper end of the second fold, and the lower end of the third fold inclines towards the side close to the back plate relative to the upper end of the third fold; the included angle between the second fold and the third fold is 60-69 degrees; the ratio of the diameter of the cross-flow fan to the thickness of the machine shell ranges from 0.528 to 0.606. By the adoption of the technical scheme, the arrangement space after the thickness of the indoor unit is reduced can be met, and meanwhile the size of the indoor unit in the vertical direction is prevented from being greatly increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, and particularly relates to a wall-mounted air conditioner. BACKGROUND

[0002] Air conditioner refers to an air conditioner, which is an air conditioner that adjusts and controls the temperature, humidity, flow rate and other parameters of the air in the environment of a building or structure by artificial means.

[0003] At present, more and more people choose to install air conditioners indoors to regulate the temperature of indoor air. The wall-mounted air conditioner is one of many types of air conditioners. The wall-mounted air conditioner has the characteristics of flexible installation position, high cost performance and wide application range, so it has become the first choice for most families when choosing an air conditioner.

[0004] In the prior art, reducing the thickness of the wall-mounted air conditioner leads to a more limited internal space of the indoor unit, which results in a smaller setting space of the heat exchanger in the indoor unit, and further results in a smaller angle between the third fold and the second fold in the heat exchanger, which leads to an increase in the vertical space occupied by the heat exchanger in the indoor unit, and further leads to an increase in the size of the indoor unit in the vertical direction, which increases the space occupied by the indoor unit on the wall, and cannot meet the size requirements of the user for the air conditioner. Content of the utility model

[0005] The embodiment of the present application discloses a wall-mounted air conditioner, which can meet the setting space of the indoor unit after reducing the thickness of the indoor unit, while avoiding a substantial increase in the vertical size of the indoor unit.

[0006] In order to achieve the above object, some embodiments of the present application provide a wall-mounted air conditioner, comprising: an indoor unit, the indoor unit comprising: a cabinet, the cabinet being provided with a cabinet air inlet and a cabinet air outlet, and a cabinet accommodating cavity being formed in the cabinet, the cabinet comprising: a top plate, the top plate being located at the upper side of the cabinet, and the cabinet air inlet being provided on the top plate; a front panel, the front panel being located at the front side of the cabinet, and the cabinet air outlet being located at the lower end of the front panel; a back panel, the back panel being located at the rear side of the cabinet, and the back panel being used for connecting with the wall of the room; a heat exchanger, the heat exchanger being arranged in the cabinet accommodating cavity, and the heat exchanger being used for heat exchanging the air flow passing through the cabinet air inlet; a cross-flow fan, the cross-flow fan being located at the side of the heat exchanger away from the cabinet air inlet, and the cross-flow fan being used for introducing the air in the room into the cabinet and sending the heat-exchanged air into the room through the cabinet air outlet; the heat exchanger comprising: a first fold, the first fold being arranged between the front panel and the cross-flow fan; a second fold, the lower end of the second fold being connected with the upper end of the first fold, and the upper end of the second fold being inclined to the side close to the back panel relative to the lower end of the second fold; a third fold, the upper end of the third fold being connected with the upper end of the second fold, and the lower end of the third fold being inclined to the side close to the back panel relative to the upper end of the third fold; the included angle between the second fold and the third fold being 60-69 degrees; and the ratio of the diameter of the cross-flow fan to the thickness of the cabinet being 0.528-0.606.

[0007] Thus, the included angle between the second fold and the third fold is 60-69 degrees, so that the heat exchanger can meet the setting space after the thickness of the cabinet is reduced under the premise of ensuring the heat exchange efficiency, reduce the occupation of the heat exchanger to the vertical space of the indoor unit, and then avoid the great increase of the vertical dimension of the indoor unit, so that the layout in the indoor unit is more compact, the increase of the vertical space occupation of the indoor unit to the wall due to the decrease of the thickness of the indoor unit is reduced, and the size requirement of the user for the indoor unit is met.

[0008] In some embodiments of the present application, the included angle between the second fold and the third fold is 62.5-64.5 degrees.

[0009] Thus, within this angle range, the heat exchanger can make the air flow produce a suitable guiding effect in the baffle process of the heat exchanger, so that the air flow flows more smoothly between the various baffle surfaces of the heat exchanger, reduces the vortex and stagnation zone of the air flow, and thus improves the heat exchange efficiency. Moreover, the air flow can more uniformly contact the surface of the heat exchanger, fully perform heat exchange, and effectively improve the refrigeration or heating effect of the indoor unit.

[0010] In some embodiments of the present application, the ratio of the overall width of the heat exchanger to the thickness of the casing is 0.78-0.91 along the arrangement direction of the front panel and the back panel.

[0011] In this way, the contact area of the heat exchanger with air can be increased while the thickness of the casing is reduced, so that air can flow more evenly through the heat exchanger, reducing vortex and dead angle of air flow, and improving the heat exchange efficiency of the heat exchanger.

[0012] In some embodiments of the present application, the overall width of the heat exchanger is 140-160 mm along the arrangement direction of the front panel and the back panel.

[0013] In this way, the thickness of the indoor unit is reduced, and the flow time of air on the surface of the heat exchanger is moderate, improving the heat exchange efficiency.

[0014] In some embodiments of the present application, the included angle between the surface of the first fold facing the cross-flow fan and the surface of the second fold facing the cross-flow fan is 150-160 degrees.

[0015] In this way, the increase in the size of the indoor unit in the vertical direction is reduced, and the heat exchange area of the first fold and the second fold of the heat exchanger is increased, improving the heat exchange efficiency of the heat exchanger.

[0016] In some embodiments of the present application, the indoor unit further comprises: a volute, the volute being arranged on the side of the cross-flow fan facing the back panel; a back volute tongue, the back volute tongue being arranged at one end of the volute close to the air inlet of the casing; and an included angle between the surface of the third fold facing the cross-flow fan and the surface of the back volute tongue facing the cross-flow fan is less than or equal to 10 degrees.

[0017] In this way, the turning angle of air after passing through the heat exchanger is reduced, the air resistance is reduced, the cross-flow fan runs more smoothly, and the energy efficiency ratio of the indoor unit is improved.

[0018] In some embodiments of the present application, the first fold comprises: a first fin group; and a first refrigerant flow path, a portion of the first refrigerant flow path being arranged through the first fin group; the second fold comprises: a second fin group; and a second refrigerant flow path, a portion of the second refrigerant flow path being arranged through the second fin group, and another portion of the first refrigerant flow path being arranged through the second fin group; and the third fold comprises: a third fin group; and a third refrigerant flow path, a portion of the third refrigerant flow path being arranged through the second fin group, another portion of the third refrigerant flow path being arranged through the third fin group, and another portion of the second refrigerant flow path being arranged through the third fin group.

[0019] Thus, the air in the second fold surface exchanges heat with the refrigerant in the first refrigerant flow path, preventing the refrigerant in the first refrigerant flow path from not being fully exchanged. Moreover, the second refrigerant flow path and the third refrigerant flow path are both arranged in the second fin group and the third fin group, further ensuring that the refrigerant in the second refrigerant flow path and the third refrigerant flow path is fully exchanged, and further ensuring that the refrigerant in the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path is fully exchanged, reducing the heat exchange difference between the first fold, the second fold, and the third fold, and improving the overall heat exchange efficiency of the heat exchanger.

[0020] In some embodiments of the present application, the indoor unit further comprises: a compressor arranged in the housing accommodating cavity, the compressor comprising a first connecting port and a second connecting port; a first total flow path, one end of the first total flow path being connected with the first connecting port of the compressor, the other end of the first total flow path being in communication with the first port of the first refrigerant flow path, the first port of the second refrigerant flow path, and the first port of the third refrigerant flow path, respectively; and a second total flow path, one end of the second total flow path being connected with the second connecting port of the compressor, the other end of the second total flow path being in communication with the second port of the first refrigerant flow path, the second port of the second refrigerant flow path, and the second port of the third refrigerant flow path, respectively.

[0021] Thus, the distribution of the refrigerant in the heat exchanger is more uniform, and the heat exchange efficiency is improved.

[0022] In some embodiments of the present application, the first port of the first refrigerant flow path is located at the first fold, and the second port of the first refrigerant flow path is located at the second fold.

[0023] Thus, the flow path of the refrigerant in the heat exchanger is more reasonable. The refrigerant enters from the first fold, is preliminarily exchanged in the first fin group, and then flows to the second fold to continue the heat exchange in the second fin group. This ensures that the heat exchange between the refrigerant in the first refrigerant flow path and the air is more sufficient, and improves the heat exchange efficiency.

[0024] In some embodiments of the present application, the angle between the surface of the third fold facing the cross-flow fan and the horizontal plane is 45 degrees to 60 degrees.

[0025] Thus, on the one hand, the condensed water is more easily drained to the drain under the action of gravity along the surface of the heat exchanger, thereby facilitating the discharge of the condensed water; on the other hand, the third fold can be ensured to fully contact with the air to improve the heat exchange effect of the third fold under the condition of meeting the limited layout space in the housing.

[0026] In some embodiments of the present application, the diameter of the cross-flow fan is 94 mm to 108 mm.

[0027] Thus, the setting space of the indoor unit is reduced, and appropriate air volume and air pressure are ensured.

[0028] In some embodiments of the present application, the thickness of the shell at the horizontal line passing through the center of the cross-flow fan is 170-190 mm.

[0029] Thus, the indoor unit occupies less space of the indoor wall, the thickness requirement of the user is met, sufficient setting space is provided for the components in the shell, and sufficient gap is ensured between the surface of the heat exchanger and the shell, so that the heat exchange efficiency of the heat exchanger is ensured.

[0030] In some embodiments of the present application, the lower end of the first fold is inclined relative to the upper end of the first fold towards the direction close to the back plate, so that the first fold has an included angle θ with the vertical direction, and θ satisfies: 0°<θ≤3°.

[0031] Thus, the thickness of the shell at the horizontal line passing through the center of the cross-flow fan is reduced while the distance between the first fold of the heat exchanger and the cross-flow fan is ensured to be sufficient.

[0032] In some embodiments of the present application, the minimum distance between the first fold and the cross-flow fan along the arrangement direction of the front panel and the back plate is greater than or equal to 10 mm.

[0033] Thus, the thickness of the shell is reduced while abnormal noise between the first fold and the cross-flow fan is avoided, which meets the thickness requirement of the user and reduces the noise level of the indoor unit during operation, thereby improving the user experience.

[0034] Compared with the prior art, the present application has at least the following beneficial effects:

[0035] The wall-mounted air conditioner provided by the embodiment of the application has an indoor unit, which comprises a casing, a heat exchanger and a cross-flow fan. The casing is provided with a casing air inlet and a casing air outlet, and a casing accommodating cavity is formed in the casing. The casing comprises a top plate located at the upper side of the casing, the casing air inlet being arranged on the top plate; a front panel located at the front side of the casing, the casing air outlet being located at the lower end of the front panel; and a back panel located at the rear side of the casing, the back panel being used for connecting with the wall of a room. The heat exchanger is arranged in the casing accommodating cavity, and is used for performing heat exchange on the airflow flowing through the casing air inlet. The cross-flow fan is located at the side of the heat exchanger away from the casing air inlet, and is used for introducing the air in the room into the casing and sending the heat-exchanged air into the room through the casing air outlet. The heat exchanger comprises a first fold arranged between the front panel and the cross-flow fan, a second fold, the lower end of the second fold being connected with the upper end of the first fold, and the upper end of the second fold being inclined to the side close to the back panel relative to the lower end of the second fold, and a third fold, the upper end of the third fold being connected with the upper end of the second fold, and the lower end of the third fold being inclined to the side close to the back panel relative to the upper end of the third fold. The included angle between the second fold and the third fold is 60-69 degrees. The ratio of the diameter of the cross-flow fan to the thickness of the casing is 0.528-0.606. In this way, the heat exchanger can meet the setting space of the casing of the indoor unit after the thickness of the casing is reduced under the premise of ensuring the heat exchange efficiency, and meanwhile, the size of the indoor unit in the vertical direction is not greatly increased, thereby meeting the requirement of the user for the size of the air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0037] Figure 1 The structure diagram of the indoor unit of the wall-mounted air conditioner disclosed by the embodiment of the application;

[0038] Figure 2 The front view of the indoor unit of the wall-mounted air conditioner disclosed by the embodiment of the application;

[0039] Figure 3 The sectional view of A-A in the embodiment of the application; Figure 2

[0040] Figure 4 The structure diagram of the heat exchanger (not including the first total flow path and the second total flow path) disclosed by the embodiment of the application;

[0041] Figure 5 The side view of the heat exchanger (not including the first total flow path and the second total flow path) disclosed by the embodiment of the application;

[0042] ​Figure 6 Structure diagram of a heat exchanger (including a first total flow path and a second total flow path) disclosed in an embodiment of the present application;

[0043] Figure 7 Structure diagram of a heat exchanger (including a first total flow path and a second total flow path) disclosed in an embodiment of the present application;

[0044] Figure 8 Structure diagram of a heat exchanger (including a first total flow path and a second total flow path) disclosed in an embodiment of the present application;

[0045] Legend of reference signs:

[0046] 100 - indoor unit;

[0047] 1 - casing; 1a - casing air inlet; 1b - casing air outlet; 1c - casing accommodating cavity; 11 - top plate; 12 - front panel; 13 - rear back plate;

[0048] 2 - heat exchanger; 21 - first fold; 211 - first fin group; 212 - first refrigerant flow path; 22 - second fold; 221 - second fin group; 222 - second refrigerant flow path; 23 - third fold; 231 - third fin group; 232 - third refrigerant flow path;

[0049] 3 - cross flow fan;

[0050] 4 - volute;

[0051] 5 - rear volute tongue;

[0052] 6 - first total flow path;

[0053] 7 - second total flow path. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0055] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0056] In addition, the above-mentioned partial terms can be used to represent other meanings in addition to the orientation or positional relationship, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0057] In addition, the terms "mount", "set", "provided with", "connected", "connected" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0058] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0059] With the improvement of living quality and the change of aesthetic concept, people no longer just satisfy with the basic performance of air conditioner, but pay more attention to the coordination and unity of its appearance and indoor decoration style, the cost performance, and the aesthetic degree with indoor environment after installation.

[0060] The wall-mounted air conditioner is a common form among various types of air conditioners, which is usually installed by suspension. The indoor unit is suspended on the indoor wall. This installation method not only effectively utilizes the wall space and avoids the problem of occupying the valuable floor space of the indoor air conditioner, but also maintains the overall coordination of the indoor decoration to a certain extent. In addition, the wall-mounted air conditioner can be applied to various house types and decoration styles. Whether it is a small or large house, whether it is a modern simple style or a Chinese classical style, the wall-mounted air conditioner can be in harmony with the indoor decoration by virtue of its various appearance designs. In addition, the wall-mounted air conditioner can also meet the different needs of different users for temperature and wind direction through various control methods. Therefore, the wall-mounted air conditioner has become a common choice for many families and office places due to its convenient installation, wide applicability, moderate price and other characteristics.

[0061] In the related art, the indoor unit of the wall-mounted air conditioner is reduced, and the setting space for the components inside the indoor unit is smaller. Setting the heat exchanger in the smaller setting space will cause the size of the cabinet of the indoor unit to increase significantly in the vertical direction.

[0062] Based on this, the embodiment of the present application provides a wall-mounted air conditioner, the setting mode of the heat exchanger of which can meet the setting space after the thickness of the indoor unit is reduced, and avoid the substantial increase of the vertical direction size of the indoor unit.

[0063] The technical solution will be further described below with reference to the embodiments and drawings.

[0064] Please refer to Figure 1 , the embodiment of the present application provides a wall-mounted air conditioner, the wall-mounted air conditioner comprising an indoor unit 100, the indoor unit 100 is an important component of the wall-mounted air conditioner, the indoor unit 100 performs air conditioning cycle by using the air supply system and the related heat exchange system. This cycle covers a series of processes, including air suction, heat exchange, air flow pushing and temperature regulation, so as to provide suitable temperature and air quality for indoor space. Through the air supply system, strong air flow is generated to suck indoor air into the air pipe type air conditioner. The sucked air then flows through the heat exchange system to absorb the heat in the air, achieve the cooling effect, and transfer the heat to the refrigerant through the heat exchange process. The cold air after heat exchange treatment is pushed back to the indoor space under the action of the air supply system, forming a cycle. Through such a cycle process, the temperature regulation of the indoor space is realized, and the indoor air quality is improved through the circulation of air flow, providing a comfortable and healthy indoor environment for users. In this embodiment, the indoor unit 100 is hung on the wall in the room.

[0065] As shown in Figure 2 and Figure 3 , the indoor unit 100 comprises a casing 1, the casing 1 is provided with a casing air inlet 1a and a casing air outlet 1b, and a casing containing cavity 1c is formed in the casing 1, the casing air inlet 1a is used to guide the air flow into the inside of the casing 1, and the casing air outlet 1b is used to guide the air flow to the indoor.

[0066] The casing 1 comprises a top plate 11, the top plate 11 is located on the upper side of the casing 1, and the casing air inlet 1a is arranged on the top plate 11.

[0067] The casing 1 further comprises a front panel 12, the front panel 12 is located on the front side of the casing 1, and the casing air outlet 1b is located at the lower end of the front panel 12.

[0068] The casing 1 further comprises a rear back plate 13, the rear back plate 13 is located on the rear side of the casing 1, and the rear back plate 13 is used to connect with the wall in the room.

[0069] The indoor unit 100 further comprises a heat exchanger 2, which is arranged in the casing accommodating cavity 1c and is used for heat exchange of the air flow passing through the casing air inlet 1a. The heat exchanger 2 is a heat exchanger, which utilizes the characteristics of easy evaporation of liquid low-temperature refrigerant at low pressure, absorbs the heat of the cooled medium, and lowers the temperature of the surrounding air, so as to achieve the refrigeration effect. The cold air cooled by the heat exchanger 2 is sent back to the room through the air supply system, thereby providing a comfortable environment for the indoor. Especially in the hot summer, the refrigeration effect of the heat exchanger 2 can significantly reduce the indoor temperature and improve the living comfort of people.

[0070] The indoor unit 100 further comprises a cross-flow fan 3, which is arranged in the casing accommodating cavity 1c and is located on the side of the heat exchanger 2 away from the casing air inlet 1a. The cross-flow fan 3 is used for introducing the air flow into the casing 1 from the casing air inlet 1a, and outputting the air flow outside from the casing air outlet 1b after heat exchange by the heat exchanger 2. Through the cross-flow fan 3, the air flow can be introduced into the interior of the casing 1, so that the air flow is sent back to the indoor after heat exchange by the heat exchanger 2 under the action of the cross-flow fan 3.

[0071] As shown in Figure 3 and Figure 4 , the heat exchanger 2 comprises a first fold 21, which is arranged between the front panel 12 and the cross-flow fan 3.

[0072] The heat exchanger 2 further comprises a second fold 22, the lower end of the second fold 22 is connected with the upper end of the first fold 21, and the upper end of the second fold 22 is inclined to the side close to the back panel 13 relative to the lower end of the second fold 22.

[0073] The heat exchanger 2 further comprises a third fold 23, the upper end of the third fold 23 is connected with the upper end of the second fold 22, and the lower end of the third fold 23 is inclined to the side close to the back panel 13 relative to the upper end of the third fold 23.

[0074] The included angle α between the second fold 22 and the third fold 23 is 60 degrees to 69 degrees, and the ratio of the diameter of the cross-flow fan 3 to the thickness M of the casing 1 is 0.528 to 0.606.

[0075] Since the ratio of the diameter of the cross-flow fan 3 to the thickness M of the casing 1 is 0.528 to 0.606, it means that under the premise that the air volume of the indoor unit 100 is sufficient, the thickness of the casing 1 is reduced, and the thickness of the casing 1 is reduced, so that the space for arranging the heat exchanger 2 in the casing 1 is smaller.

[0076] When the angle a between the second fold 22 and the third fold 23 of the heat exchanger 2 is less than 60 degrees, the heat exchanger 2 occupies more vertical space in the casing 1, resulting in an increase in the vertical size of the casing 1, and further resulting in an increase in the vertical space occupied by the indoor unit 100 on the wall. When the angle a between the second fold 22 and the third fold 23 of the heat exchanger 2 is greater than 69 degrees, it means that the heat exchanger 2 occupies more space in the thickness direction of the casing 1, which cannot meet the setting space after the thickness of the casing 1 is reduced.

[0077] Therefore, in the embodiment, the angle a between the second fold 22 and the third fold 23 of the heat exchanger 2 is set to 60 degrees to 69 degrees, so that the heat exchanger 2 can meet the setting space after the thickness of the casing 1 is reduced while ensuring the heat exchange efficiency, reduce the vertical space occupied by the heat exchanger 2 in the indoor unit 100, and further avoid a large increase in the vertical size of the indoor unit 100, so that the layout in the indoor unit 100 is more compact, the increase in the vertical space occupied by the indoor unit 100 on the wall due to the decrease in the thickness of the indoor unit 100 is reduced, and the size requirement of the user for the indoor unit 100 is met.

[0078] It should be noted that, in the embodiment, as shown in Figure 3 , the thickness M of the casing 1 of the indoor unit 100 is 178 mm, and the heat exchanger 2 is a three-fold heat exchanger.

[0079] In some embodiments, the angle between the second fold 22 and the third fold 23 of the heat exchanger 2 is 62.5 degrees to 64.5 degrees. Within this angle range, the heat exchanger 2 can make the airflow produce a suitable guiding effect in the folding process of the heat exchanger 2, so that the airflow flows more smoothly between the folds of the heat exchanger 2, reduces the vortex and stagnation zone of the airflow, and thus improves the heat exchange efficiency. Moreover, the airflow can more uniformly contact the surface of the heat exchanger 2 for heat exchange, effectively improving the refrigeration or heating effect of the indoor unit 100.

[0080] Preferably, the angle between the second fold 22 and the third fold 23 of the heat exchanger 2 is 63.2 degrees. At this time, the second fold and the third fold of the heat exchanger 2 can better cooperate, so that the overall structure of the heat exchanger 2 is more compact, while ensuring the effective use of the heat exchange area. In the limited space of the casing 1, a larger heat exchange area can be achieved, further improving the heat exchange performance. While ensuring that the heat exchanger 2 meets the setting space after the thickness of the casing 1 is reduced, the heat exchange efficiency of the heat exchanger 2 is optimized.

[0081] In some embodiments, in combination with Figure 3 and Figure 5 , along the arrangement direction of the front panel 12 and the rear back plate 13, the ratio of the overall width N of the heat exchanger 2 to the thickness M of the casing 1 is 0.78 to 0.91.

[0082] When the ratio of the overall width N of heat exchanger 2 to the thickness M of casing 1 is less than 0.78, the width of heat exchanger 2 is too small relative to the thickness of casing 1, resulting in insufficient heat exchange area, shorter contact time between air and heat exchanger 2, and insufficient heat exchange, thus affecting the cooling and heating effect of indoor unit 100. When the ratio of the overall width N of heat exchanger 2 to the thickness M of casing 1 is greater than 0.91, it means that the space occupied by heat exchanger 2 in casing 1 is too large, resulting in too small a distance between the surface of heat exchanger 2 and casing 1, which will reduce the airflow in contact with the surface of heat exchanger 2, thus reducing the heat exchange efficiency of heat exchanger 2.

[0083] Therefore, by setting the ratio of the overall width of the heat exchanger 2 to the thickness of the casing 1 to be 0.78 to 0.91, the contact area between the heat exchanger 2 and the air can be increased while the thickness of the casing 1 is reduced. This allows the air to flow more evenly through the heat exchanger 2, reduces air eddies and dead zones, and improves the heat exchange efficiency of the heat exchanger 2.

[0084] In some embodiments, such as Figure 5 As shown, along the arrangement direction of the front panel 12 and the rear panel 13, the overall width N of the heat exchanger 2 is 140mm to 160mm. When the overall width N of the heat exchanger 2 is less than 140mm, the heat exchange surface area provided by the heat exchanger 2 is too small, which will result in insufficient heat exchange of air on the surface of the heat exchanger 2. When the overall width N of the heat exchanger 2 is greater than 160mm, it not only increases the space occupied in the casing 1, but also causes uneven airflow, forming dead zones and reducing the heat exchange performance of the heat exchanger 2.

[0085] Therefore, the overall width N of the heat exchanger 2 is set to 140mm to 160mm, which maintains the thickness of the indoor unit 100 after reduction, and ensures that the air flows on the surface of the heat exchanger 2 for a moderate time, thereby improving the heat exchange efficiency.

[0086] It should be noted that the overall width N of the heat exchanger 2 can also be 140mm, 146mm, 156mm or 160mm, and this embodiment does not make a specific limitation on this.

[0087] For example, the overall width N of heat exchanger 2 is 146 mm, and the thickness M of casing 1 is 178 mm. While satisfying the installation space requirements after reducing the thickness of casing 1, the 146 mm width of heat exchanger 2 provides sufficient heat exchange area, allowing air enough time and space to exchange heat with heat exchanger 2 as it flows through it, thereby improving heat exchange efficiency and achieving better cooling or heating effects. Furthermore, at this width, the airflow distribution on the surface of heat exchanger 2 is relatively uniform, avoiding insufficient heat exchange caused by localized excessively fast or slow airflow, further improving heat exchange efficiency.

[0088] In some embodiments, such asFigure 5 As shown, the included angle β between the surface of the first fold 21 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the second fold 22 facing the cross-flow fan 3 is 150-160 degrees.

[0089] When the included angle β between the surface of the first fold 21 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the second fold 22 facing the cross-flow fan 3 is less than 150 degrees, it will cause the airflow to be unevenly distributed on the surface of the second fold 22 and the first fold 21 of the heat exchanger 2, with some areas having too high a flow rate, while other areas may have stagnant or vortex airflow, reducing the heat exchange efficiency. It will also reduce the contact time of the airflow with the surface of the heat exchanger 2, resulting in insufficient heat exchange; when the included angle β between the surface of the first fold 21 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the second fold 22 facing the cross-flow fan 3 is greater than 160 degrees, it will not only affect the heat exchange effect of the heat exchanger 2, but also increase the occupation of the vertical space inside the casing 1, resulting in an increase in the vertical space occupied by the indoor unit 100 on the wall.

[0090] Therefore, the included angle β between the surface of the first fold 21 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the second fold 22 facing the cross-flow fan 3 is set to 150-160 degrees, which not only reduces the increase in the size of the indoor unit 100 in the vertical direction, but also increases the heat exchange area of the first fold 21 and the second fold 22 of the heat exchanger 2, improving the heat exchange efficiency of the heat exchanger 2.

[0091] In some embodiments, as shown in Figure 3 The indoor unit 100 further comprises a volute 4 for guiding airflow, the volute 4 is designed with a specific volute shape so that the airflow can rotate along the curved shape of the volute 4, gradually accelerating, and the kinetic energy of the airflow increases as it flows through the volute 4 due to the shape of the volute 4.

[0092] The indoor unit 100 further comprises a rear volute tongue 5, which is arranged at one end of the volute 4 close to the casing air inlet 1a.

[0093] The included angle between the surface of the third fold 23 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the rear volute tongue 5 facing the cross-flow fan 3 is less than or equal to 10 degrees.

[0094] Figure 3 As shown in the third fold 23 of the heat exchanger 2 facing the surface of the cross-flow fan 3 and the surface of the rear volute tongue 5 facing the surface of the cross-flow fan 3 in the middle, i.e. the included angle between the surface of the third fold 23 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the rear volute tongue 5 facing the cross-flow fan 3 is 0 degrees.

[0095] The angle between the surface of the third fold 23 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the rear volute tongue 5 facing the cross-flow fan 3 has a certain relationship with the flow direction of the air. When the angle between the surface of the third fold 23 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the rear volute tongue 5 facing the cross-flow fan 3 is greater than 10 degrees, the air after passing through the heat exchanger 2 needs to be deflected in a larger direction to enter between the rear volute tongue 5 and the cross-flow fan 3, so that the air resistance increases. If the cross-flow fan 3 needs to drive the air to enter between the volute 4 and the cross-flow fan 3, a higher energy efficiency is required.

[0096] Therefore, the angle between the surface of the third fold 23 of the heat exchanger 2 facing the cross-flow fan 3 and the surface of the rear volute tongue 5 facing the cross-flow fan 3 is less than or equal to 10 degrees, which helps to reduce the turning angle of the air after passing through the heat exchanger 2, reduces the air resistance, and makes the cross-flow fan 3 run more smoothly, thereby improving the energy efficiency ratio of the indoor unit 100.

[0097] In some embodiments, as shown in FIG. 1, the first fold 21 of the heat exchanger 2 includes a first fin group 211 and a first refrigerant flow path 212, and a portion of the first refrigerant flow path 212 passes through the first fin group 211. Figure 4

[0098] The second fold 22 of the heat exchanger 2 includes a second fin group 221 and a second refrigerant flow path 222, a portion of the second refrigerant flow path 222 passes through the second fin group 221, and another portion of the first refrigerant flow path 212 passes through the second fin group 221.

[0099] The third fold 23 of the heat exchanger 2 includes a third fin group 231 and a third refrigerant flow path 232, a portion of the third refrigerant flow path 232 passes through the second fin group 221, another portion of the third refrigerant flow path 232 passes through the third fin group 231, and another portion of the second refrigerant flow path 222 passes through the third fin group 231.

[0100] Because the thickness of the indoor unit 100 is reduced, the distance between the first fold 21 of the heat exchanger 2 and the front panel 12 of the casing 1 is reduced, which reduces the amount of air radially exchanged by the surface of the first fold 21, and the refrigerant in the first refrigerant flow path 212 in the first fold 21 may be backflowed before being fully exchanged.

[0101] ​Therefore, a part of the first refrigerant flow path 212 is arranged through the first fin group 211, another part of the first refrigerant flow path 212 is arranged through the second fin group 221, and the refrigerant in the first refrigerant flow path 212 is exchanged with air on the surface of the second fold 22 to prevent the refrigerant in the first refrigerant flow path 212 from being insufficiently exchanged. In addition, the second refrigerant flow path 222 and the third refrigerant flow path 232 are arranged through the second fin group 221 and the third fin group 231, further ensuring that the refrigerant in the second refrigerant flow path 222 and the third refrigerant flow path 232 is fully exchanged, and further ensuring that the refrigerant in the first refrigerant flow path 212, the second refrigerant flow path 222, and the third refrigerant flow path 232 is fully exchanged, reducing the difference in heat exchange between the first fold 21, the second fold 22, and the third fold 23, and improving the overall heat exchange efficiency of the heat exchanger 2.

[0102] In some embodiments, the indoor unit 100 further comprises a compressor (not shown in the figure), which is arranged in the shell accommodating cavity 1c, and the compressor comprises a first connecting port and a second connecting port.

[0103] As shown in Figure 6 and Figure 7 , the indoor unit 100 further comprises a first total flow path 6, one end of the first total flow path 6 is connected with the first connecting port of the compressor, and the other end of the first total flow path 6 is respectively communicated with the first port of the first refrigerant flow path 212, the first port of the second refrigerant flow path 222, and the first port of the third refrigerant flow path 232.

[0104] The first port of the first refrigerant flow path 212, the first port of the second refrigerant flow path 222, and the first port of the third refrigerant flow path 232 are located on the same side of the heat exchanger 2 along the axial direction of the cross-flow fan 3.

[0105] The indoor unit 100 further comprises a second total flow path 7, one end of the second total flow path 7 is connected with the second connecting port of the compressor, and the other end of the second total flow path 7 is respectively communicated with the second port of the first refrigerant flow path 212, the second port of the second refrigerant flow path 222, and the second port of the third refrigerant flow path 232.

[0106] The second port of the first refrigerant flow path 212, the second port of the second refrigerant flow path 222, and the second port of the third refrigerant flow path 232 are located on the same side of the heat exchanger 2 along the axial direction of the cross-flow fan 3.

[0107] In this way, through the design of the first total flow path 6 and the second total flow path 7, the refrigerant can be uniformly distributed to the first refrigerant flow path 212, the second refrigerant flow path 222, and the third refrigerant flow path 232 through the first total flow path 6 or the second total flow path 7, ensuring that the refrigerant is more evenly distributed in the heat exchanger 2, and improving the heat exchange efficiency.

[0108] In some embodiments, as shown in Figure 5As shown, the first port of the first refrigerant flow path 212 is located at the outer side of the first fold 21, and the second port of the first refrigerant flow path 212 is located at the inner side of the second fold 22. That is, the first port of the first refrigerant flow path 212 is located at the outer side of the first fold 21 in the first fin group 211, and the second port of the first refrigerant flow path 212 is located at the inner side of the second fold 22 in the second fin group 221. Figure 5 Figure 5

[0109] In this way, the flow path of the refrigerant in the heat exchanger 2 is more reasonable. The refrigerant enters from the first fold 21, undergoes preliminary heat exchange in the first fin group 211, and then flows to the second fold 22 to continue heat exchange in the second fin group 221. This ensures that the heat exchange between the refrigerant in the first refrigerant flow path 212 and the air is more sufficient, improving the heat exchange efficiency.

[0110] In some embodiments, as shown, the angle γ between the surface of the cross-flow fan 3 and the horizontal plane of the third fold 23 of the heat exchanger 2 is 45-60 degrees.

[0111] When the angle γ between the surface of the cross-flow fan 3 and the horizontal plane of the third fold 23 of the heat exchanger 2 is less than 45 degrees, the third fold 23 will occupy more space in the thickness direction of the cabinet 1, and the flow speed of the condensed water on the surface of the heat exchanger 2 will slow down, which can cause water accumulation on the surface of the heat exchanger 2, affecting the drainage of the condensed water. When the angle γ between the surface of the cross-flow fan 3 and the horizontal plane of the third fold 23 of the heat exchanger 2 is greater than 60 degrees, not only will the third fold 23 occupy more space in the vertical direction of the cabinet 1, but also the heat exchange area of the third fold 23 in contact with the air will be reduced, resulting in insufficient contact between the air and the third fold 23, and reducing the heat exchange efficiency of the heat exchanger 2.

[0112] Therefore, the angle γ between the surface of the cross-flow fan 3 and the horizontal plane of the third fold 23 is 45-60 degrees, which on the one hand makes it easier for the condensed water to flow to the drain under the action of gravity along the surface of the heat exchanger 2, thereby facilitating the drainage of the condensed water, and on the other hand ensures sufficient contact with the air and improves the heat exchange effect of the third fold 23 under the condition of limited layout space in the cabinet 1.

[0113] In some embodiments, the diameter of the cross-flow fan 3 is 94-108 mm.

[0114] Due to the reduced thickness of the indoor unit 100, the layout space in the indoor unit 100 is smaller. When the diameter of the cross-flow fan 3 is less than 94 mm, the cross-flow fan cannot provide sufficient air volume, resulting in insufficient air flow speed, which can reduce the air output of the indoor unit 100. When the diameter of the cross-flow fan 3 is greater than 108 mm, the air flow resistance will increase, resulting in increased energy loss and reduced energy efficiency ratio of the indoor unit 100.

[0115] ​​Therefore, the diameter of the cross-flow fan 3 is set to 94mm-108mm, which not only meets the setting space of the indoor unit 100 after the thickness is reduced, but also can ensure to provide appropriate air volume and air pressure.

[0116] In some embodiments, the thickness of the casing 1 at the horizontal line passing through the center of the cross-flow fan 3 is 170mm-190mm. It should be noted that the thickness of the casing 1 at the horizontal line passing through the center of the cross-flow fan 3 is the thickness M of the casing 1.

[0117] When the thickness of the casing 1 at the horizontal line passing through the center of the cross-flow fan 3 is greater than 190mm, the casing 1 will occupy more indoor wall space, resulting in an unattractive overall appearance and not meeting the user's requirements for the thickness of the indoor unit 100. When the thickness of the casing 1 at the horizontal line passing through the center of the cross-flow fan 3 is less than 170mm, the setting space for components in the casing 1 will be too small, resulting in a small setting space for the heat exchanger 2, the cross-flow fan 3, and the electric heater, and reducing the gap between the surface of the heat exchanger 2 and the casing 1, which affects the heat exchange efficiency of the heat exchanger 2.

[0118] Therefore, in the present embodiment, the thickness of the casing 1 at the horizontal line passing through the center of the cross-flow fan 3 is set to 170mm-190mm, which not only reduces the occupation of the indoor unit 100 to the indoor wall space and meets the user's requirements for the thickness of the indoor unit 100, but also provides sufficient setting space for the components in the casing 1 and ensures that there is sufficient gap between the surface of the heat exchanger 2 and the casing 1, thereby ensuring the heat exchange efficiency of the heat exchanger 2.

[0119] For example, the thickness of the casing 1 at the horizontal line passing through the center of the cross-flow fan 3 is 178mm, the diameter of the cross-flow fan 3 is 98mm, and the overall width of the heat exchanger 2 is 146mm. At this time, the ratio of the diameter of the cross-flow fan 3 to the thickness of the casing 1 is 0.528, and the ratio of the overall width of the heat exchanger 2 to the thickness of the casing 1 is 0.82. At this time, the cross-flow fan 3 can provide sufficient air volume, and the gap between the surface of the heat exchanger 2 and the casing 1 is sufficient, so that sufficient air can enter the gap between the surface of the heat exchanger 2 and the casing 1 and exchange heat with the surface of the heat exchanger 2, thereby optimizing the heat exchange efficiency of the heat exchanger 2.

[0120] In some embodiments, in combination with Figure 3 and Figure 8 , the lower end of the first fold 21 of the heat exchanger 2 is inclined relative to the upper end of the first fold towards the rear back plate 13, so that the first fold 21 and the vertical direction Z have an included angle θ, and θ satisfies: 0°<θ≤3°. That is, the included angle θ between the first fold 21 and the vertical direction Z is less than or equal to 3°.

[0121] When the included angle θ between the first fold 21 and the vertical direction Z is greater than 3°, it means that the lower end of the first fold 21 is more inclined to the back plate 13, which will cause the distance between the first fold 21 and the cross-flow fan 3 to be too small, resulting in abnormal noise between the first fold 21 and the cross-flow fan 3 when the indoor unit 100 is running.

[0122] Therefore, by setting the included angle θ between the first fold 21 and the vertical direction Z to be less than or equal to 3°, the thickness of the cabinet 1 at the horizontal line passing through the center of the cross-flow fan 3 can be reduced while ensuring that the distance between the first fold 21 of the heat exchanger 2 and the cross-flow fan 3 is sufficient.

[0123] It should be noted that the included angle θ between the first fold 21 and the vertical direction Z can be 0°, 1°, 2°, or 3°, and the present embodiment does not make specific limitations thereon. For example, the included angle θ between the first fold 21 and the vertical direction Z is 0°, i.e., the first fold 21 is parallel to the vertical direction Z (as shown in Figure 3 and Figure 5 At this time, the distance between the first fold 21 and the front panel 12 is equal everywhere, so that the airflow contacting the surface of the first fold 21 is approximately equal, which helps to improve the heat exchange effect.

[0124] In some embodiments, referring to Figure 3 , along the arrangement direction of the front panel 12 and the back plate 13, the minimum distance L between the first fold 21 of the heat exchanger 2 and the cross-flow fan 3 is greater than or equal to 10 mm. It should be noted that the arrangement direction of the front panel 12 and the back plate 13 is the horizontal direction, which is also referred to as the thickness direction of the cabinet 1, i.e. Figure 3 from left to right in

[0125] When the minimum distance L between the first fold 21 of the heat exchanger 2 and the cross-flow fan 3 is less than 10 mm, the airflow resistance between the first fold 21 and the cross-flow fan 3 will increase due to the small distance therebetween, which will cause abnormal noise between the first fold 21 and the cross-flow fan 3 when the cross-flow fan 3 rotates, thereby increasing the noise level when the indoor unit 100 is running.

[0126] Therefore, after the thickness M of the cabinet 1 is reduced, by setting the minimum distance L between the first fold 21 and the cross-flow fan 3 to be greater than or equal to 10 mm, the thickness M of the cabinet 1 can be reduced while avoiding abnormal noise between the first fold 21 and the cross-flow fan 3, which not only meets the user's requirement for the thickness of the cabinet 1, but also reduces the noise level when the indoor unit 100 is running, thereby improving the user's experience.

[0127] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wall-mounted air conditioner characterized by comprising: The indoor unit comprises: a casing provided with a casing air inlet and a casing air outlet, and a casing accommodating cavity formed in the casing, the casing comprising: a top plate located at the upper side of the casing, the casing air inlet being provided on the top plate; a front panel located at the front side of the casing, the casing air outlet being located at the lower end of the front panel; a back panel located at the rear side of the casing, the back panel being used to connect with the wall of the room; a heat exchanger provided in the casing accommodating cavity, the heat exchanger being used to exchange heat for the air flow passing through the casing air inlet; a cross flow fan located at the side of the heat exchanger away from the casing air inlet, the cross flow fan being used to introduce the air in the room into the casing, and send the heat-exchanged air into the room through the casing air outlet; the heat exchanger comprising: a first fold provided between the front panel and the cross flow fan; a second fold, the lower end of the second fold being connected with the upper end of the first fold, the upper end of the second fold being inclined to the side close to the back panel relative to the lower end of the second fold; a third fold, the upper end of the third fold being connected with the upper end of the second fold, the lower end of the third fold being inclined to the side close to the back panel relative to the upper end of the third fold; the included angle between the second fold and the third fold being 60-69 degrees; the ratio of the diameter of the cross flow fan to the thickness of the casing being 0.528-0.

606. the included angle between the second fold and the third fold being 62.5-64.5 degrees.

2. The wall-mounted air conditioner according to claim 1, wherein the ratio of the overall width of the heat exchanger to the thickness of the casing along the arrangement direction of the front panel and the back panel being 0.78-0.

91.

3. The wall-mounted air conditioner according to claim 2, wherein the overall width of the heat exchanger along the arrangement direction of the front panel and the back panel being 140-160 mm.

4. The wall-mounted air conditioner according to claim 3, wherein the included angle between the surface of the first fold facing the cross flow fan and the surface of the second fold facing the cross flow fan being 150-160 degrees.

5. The wall surface-mounted air conditioner according to claim 1, wherein The indoor unit further comprises:

6. The wall surface-mounted type air conditioner, as recited in claim 1, wherein a volute provided around the side of the cross flow fan facing the back panel; a back volute tongue provided at the end of the volute close to the casing air inlet; the included angle between the surface of the third fold facing the cross flow fan and the surface of the back volute tongue facing the cross flow fan being less than or equal to 10 degrees.

7. The wall-mounted air conditioner according to claim 1, wherein the first fold comprises: a first fin group; a first refrigerant flow path, a part of the first refrigerant flow path being provided through the first fin group; the second fold comprises: a second fin group; a second refrigerant flow path, a part of the second refrigerant flow path being provided through the second fin group, and another part of the first refrigerant flow path being provided through the second fin group; the third fold comprises: a third fin group; ​ A third refrigerant flow path, a portion of the third refrigerant flow path being provided through the second fin group, another portion of the third refrigerant flow path being provided through the third fin group, and another portion of the second refrigerant flow path being provided through the third fin group.

8. The wall-mounted air conditioner according to claim 7, wherein, The indoor unit further comprises: A compressor provided in the housing accommodating cavity, the compressor comprising a first connecting port and a second connecting port; A first total flow path, one end of the first total flow path being connected with the first connecting port of the compressor, the other end of the first total flow path being respectively communicated with a first port of the first refrigerant flow path, a first port of the second refrigerant flow path and a first port of the third refrigerant flow path; A second total flow path, one end of the second total flow path being connected with the second connecting port of the compressor, the other end of the second total flow path being respectively communicated with a second port of the first refrigerant flow path, a second port of the second refrigerant flow path and a second port of the third refrigerant flow path.

9. The wall-mounted air conditioner according to claim 8, wherein, The first port of the first refrigerant flow path is located at the first fold, and the second port of the first refrigerant flow path is located at the second fold.

10. The wall surface-mounted air conditioner according to claim 1, wherein An angle between the third fold and a horizontal plane is 45 degrees to 60 degrees.

11. The wall surface-mounted air conditioner according to claim 1, wherein A diameter of the cross-flow fan is 94 mm to 108 mm.

12. The wall-mounted air conditioner according to claim 4, wherein A thickness of the housing at a horizontal line passing through the center of the cross-flow fan is 170 mm to 190 mm.

13. The wall-mounted air conditioner according to claim 1, wherein A lower end of the first fold is inclined relative to an upper end of the first fold toward the rear back plate, so that the first fold has an angle θ with a vertical direction, and θ satisfies: 0° < θ ≤ 3°.

14. The wall-mounted air conditioner according to claim 13, wherein, A minimum distance between the first fold and the cross-flow fan along an arrangement direction of the front panel and the rear back plate is greater than or equal to 10 mm.

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