Cabinet air conditioner

Abstract

The utility model provides a cabinet type air conditioner. The cabinet type air conditioner comprises a machine shell, an air outlet channel, a first air inlet channel, a second air inlet channel and a first motor. A first air inlet, a second air inlet and an air outlet are sequentially formed in the first side wall of the machine shell at intervals in the transverse direction. The second air inlet is located between the first air inlet and the air outlet. An outlet of the air outlet duct is connected with the air outlet. And an air outlet wind wheel is arranged in the air outlet duct. The inlet side of the air outlet wind wheel comprises a first inlet and a second inlet, and the second inlet is located in the side, close to the first side wall, of the first inlet. The first air inlet duct is formed between the first air inlet and the first inlet, and a first air inlet wind wheel is arranged in the first air inlet duct. The second air inlet duct is formed between the second air inlet and the second inlet. The first motor is in transmission connection with the air outlet wind wheel and the first air inlet wind wheel. According to the air conditioner, an air inlet wind wheel motor can be omitted, and the effect of reducing the production cost of the air conditioner is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a cabinet air conditioner. Background Art

[0002] For a cabinet air conditioner embedded in a furniture cabinet (such as a kitchen cabinet or a TV cabinet), since its left and right sides and the rear side are blocked by the furniture cabinet, it is difficult to form effective return air channels on the left and right sides and the rear side. Usually, the air inlet and the air outlet are both arranged on the front panel. Due to the large change in the air flow direction, a large air loss will be generated in the air flow path, resulting in a small air outlet volume and a short air supply distance of the air conditioner, which affects the user experience.

[0003] To solve the above problems, the related art proposes a solution of setting an air inlet impeller and an air inlet impeller motor to increase the air inlet volume, thereby increasing the air outlet volume. However, setting the air inlet impeller motor will increase the production cost of the air conditioner. Summary of the Utility Model

[0004] In view of the above problems, the present utility model is proposed to provide a cabinet air conditioner that overcomes or at least partially solves the above problems, aiming to solve the problem that setting an air inlet impeller motor in the existing air conditioner will increase the production cost of the air conditioner.

[0005] Specifically, the present utility model provides the following technical solutions:

[0006] A cabinet air conditioner includes a housing, an air outlet duct, a first air inlet duct, a second air inlet duct, and a first motor.

[0007] A first air inlet, a second air inlet, and an air outlet are sequentially arranged at intervals in the transverse direction on a first side wall of the housing. The second air inlet is between the first air inlet and the air outlet.

[0008] An outlet of the air outlet duct is connected to the air outlet. An air outlet impeller is arranged in the air outlet duct. The inlet side of the air outlet impeller includes a first inlet and a second inlet, and the second inlet is on a side of the first inlet close to the first side wall.

[0009] The first air inlet duct is formed between the first air inlet and the first inlet, and a first air inlet impeller is arranged in the first air inlet duct.

[0010] The second air inlet duct is formed between the second air inlet and the second inlet.

[0011] The first motor is drivingly connected to the air outlet impeller and the first air inlet impeller.

[0012] Optionally, a third air inlet is further provided on the first side wall of the casing, and the third air inlet is located above or below the second air inlet.

[0013] The inner side of the third air inlet is connected to a third air inlet duct, and the outlet end of the third air inlet duct is located inside the first air inlet duct. A second air inlet impeller is provided in the third air inlet duct.

[0014] The first motor is also drivingly connected to the second air inlet impeller.

[0015] Optionally, both the air outlet impeller and the first air inlet impeller are cross-flow impellers and are both arranged vertically.

[0016] The air conditioner further includes a heat exchanger arranged vertically, and the heat exchanger is located on the side of the first inlet and the second inlet away from the air outlet impeller.

[0017] The outlet end of the third air inlet duct is located between the first air inlet impeller and the heat exchanger.

[0018] Optionally, the third air inlet is located above the second air inlet. The first motor is coaxially and fixedly connected to the rotating shaft at the upper end of the air outlet impeller. The second air inlet impeller is coaxially and fixedly connected to the rotating shaft at the upper end of the first air inlet impeller. The first motor is drivingly connected to the first air inlet impeller and the second air inlet impeller through a transmission mechanism.

[0019] Optionally, the third air inlet is located below the second air inlet. The first motor is coaxially and fixedly connected to the rotating shaft at the lower end of the air outlet impeller. The second air inlet impeller is coaxially and fixedly connected to the rotating shaft at the lower end of the first air inlet impeller. The first motor is drivingly connected to the first air inlet impeller and the second air inlet impeller through a transmission mechanism.

[0020] Optionally, the third air inlet is located above the second air inlet. The first motor is coaxially and fixedly connected to the rotating shaft at the upper end of the air outlet impeller. The second air inlet impeller is coaxially and fixedly connected to the rotating shaft at the upper end of the first air inlet impeller. The first motor is drivingly connected to the first air inlet impeller and the second air inlet impeller through a transmission mechanism.

[0021] The second air inlet impeller is a centrifugal impeller or an axial-flow impeller. The inlet side of the second air inlet impeller opens upward. The outlet end of the third air inlet duct opens downward.

[0022] Optionally, the distance between the outlet end of the third air inlet duct and the upper end of the heat exchanger is less than 1 / 4 of the height of the heat exchanger.

[0023] Optionally, the upper end of the first inlet air blower wheel is lower than the upper end of the heat exchanger, and the lower end of the first inlet air blower wheel is higher than the lower end of the heat exchanger.

[0024] Optionally, the heat exchanger includes a first heat exchange section and a second heat exchange section fixedly connected. The first heat exchange section is within the first inlet air duct, and the second heat exchange section is within the second inlet air duct.

[0025] The outlet end of the third inlet air duct is between the first inlet air blower wheel and the first heat exchange section.

[0026] Optionally, the distance from the axis of the first inlet air blower wheel to the first side wall is less than the distance from the axis of the outlet air blower wheel to the first side wall. The axes of the first inlet air blower wheel and the outlet air blower wheel are on a first plane, and the angle between the first plane and the first side wall is 5 - 30 degrees.

[0027] The first inlet air duct includes a diffuser duct formed on the outlet side of the first inlet air blower wheel. The diffuser duct is on the side of the first plane away from the first side wall. The outlet end of the third inlet air duct is between the diffuser duct and the first heat exchange section.

[0028] Optionally, a volute side wall and a volute tongue side wall are provided on the outlet side of the first inlet air blower wheel. The diffuser duct is formed between the volute side wall and the volute tongue side wall.

[0029] The volute tongue side wall is on the side of the volute side wall close to the first side wall. The angle between the volute tongue side wall and the first plane is 0 - 15 degrees.

[0030] Optionally, the angle between the first heat exchange section and the volute tongue side wall is 110 - 170 degrees.

[0031] Optionally, the angle between the second heat exchange section and the first side wall is 55 - 85 degrees.

[0032] In a cabinet - type air conditioner of the present utility model, by providing a first air inlet on the first side wall and a first inlet air blower wheel in the first inlet air duct, air can be supplied to the outlet air blower wheel, the flow rate of the inlet air flow can be increased, the air loss caused by a large change in the air path direction can be compensated, thereby increasing the air volume and the air supply distance of the air conditioner. By driving both the outlet air blower wheel and the first inlet air blower wheel to a first motor, the need for an inlet air blower wheel motor can be eliminated, achieving the effect of reducing the production cost of the air conditioner.

[0033] From the following detailed description of specific embodiments of the present utility model in conjunction with the accompanying drawings, those skilled in the art will become more clear about the above - mentioned and other objects, advantages and features of the present utility model. Brief Description of the Drawings

[0034] Some specific embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings in an illustrative rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0035] Figure 1 is a schematic front view of a floor-standing air conditioner according to an embodiment of the present utility model;

[0036] Figure 2 is a schematic structural view of a floor-standing air conditioner according to an embodiment of the present utility model;

[0037] Figure 3 is Figure 1 a schematic cross-sectional view along the A-A axis in;

[0038] Figure 4 is a schematic cross-sectional view of a floor-standing air conditioner according to an embodiment of the present utility model along a first plane;

[0039] Figure 5 is a schematic structural view of a first inlet air impeller, an outlet air impeller, a second inlet air impeller, a first motor and a transmission mechanism of an air conditioner according to an embodiment of the present utility model;

[0040] Figure 6 is a schematic front view of a first inlet air impeller, an outlet air impeller, a second inlet air impeller, a first motor and a transmission mechanism of an air conditioner according to an embodiment of the present utility model;

[0041] Figure 7 is a schematic front view of a first inlet air impeller, an outlet air impeller, a second inlet air impeller, a first motor and a transmission mechanism of an air conditioner according to an embodiment of the present utility model.

[0042] List of reference numerals:

[0043] 10, housing; 11, first side wall; 21, first air inlet; 22, first air inlet duct; 221, diffuser duct; 222, volute side wall; 223, volute tongue side wall; 23, first inlet air impeller; 31, second air inlet; 32, second air inlet duct; 41, air outlet; 42, air outlet duct; 43, outlet air impeller; 44, first inlet; 45, second inlet; 51, third air inlet; 52, third air inlet duct; 53, second inlet air impeller; 531, inlet side of the second inlet air impeller; 54, outlet end of the third air inlet duct; 55, air guide duct; 60, heat exchanger; 61, first heat exchange section; 62, second heat exchange section; 70, first plane; 81, first motor; 82, transmission mechanism. Detailed embodiments

[0044] The following will refer to Figures 1 to 7 to describe the cabinet air conditioner according to the embodiments of the present invention. In the description of the embodiments, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, including one or more of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0045] Unless otherwise clearly defined and limited, the terms "arranged", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific situations.

[0046] In addition, in the description of the embodiments, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. That is, in the description of the embodiments, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" or "under" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0047] In the description of the embodiments, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", 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 present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0048] Figure 1is a schematic front view of a cabinet air conditioner according to an embodiment of the present utility model, as Figure 1 shown, and referring to Figures 2 - 7 . An embodiment of the present utility model provides a cabinet air conditioner, including a housing 10, an air outlet duct 42, a first air inlet duct 22, a second air inlet duct 32, and a first motor 81.

[0049] On the first side wall 11 of the housing 10, a first air inlet 21, a second air inlet 31, and an air outlet 41 are sequentially arranged at intervals in the transverse direction. The second air inlet 31 is between the first air inlet 21 and the air outlet 41.

[0050] The outlet of the air outlet duct 42 is connected to the air outlet 41. An air outlet impeller 43 is arranged in the air outlet duct 42. The inlet side of the air outlet impeller 43 includes a first inlet 44 and a second inlet 45, and the second inlet 45 is on the side of the first inlet 44 close to the first side wall 11.

[0051] The first air inlet duct 22 is formed between the first air inlet 21 and the first inlet 44, and a first air inlet impeller 23 is arranged in the first air inlet duct 22.

[0052] The second air inlet duct 32 is formed between the second air inlet 31 and the second inlet 45.

[0053] The first motor 81 is drivingly connected to the air outlet impeller 43 and the first air inlet impeller 23.

[0054] The housing 10 of the cabinet air conditioner generally may include a front side wall, a left side wall, a right side wall, a rear side wall, a top cover, and a base, etc. The cabinet air conditioner can be embedded and installed in a storage space inside a furniture cabinet (such as a kitchen cabinet, a TV cabinet) or a wall, for example, embedded and installed in a cabinet compartment of a TV cabinet. The cabinet compartment can open forward, or can open left or right. Correspondingly, the first side wall 11 can be the front side wall, the left side wall, or the right side wall.

[0055] The installation method of the cabinet air conditioner can be a standing type, that is, the base of the air conditioner is placed on the bottom plate of the cabinet compartment of the furniture cabinet or the floor inside the cabinet compartment. The installation method of the cabinet air conditioner can also be a wall-mounted type, that is, the rear side wall of the air conditioner is hung on the back panel of the cabinet compartment of the furniture cabinet or the wall inside the cabinet compartment. The installation method of the cabinet air conditioner can also be a ceiling-mounted type, that is, the top cover of the air conditioner is hung on the top plate of the cabinet compartment of the furniture cabinet or the roof inside the cabinet compartment.

[0056] For a cabinet-type air conditioner embedded and installed in a furniture cabinet or a wall, since its left and right sides and the rear side are blocked, it is difficult to form effective return air channels on the left and right sides and the rear side. Usually, the air inlet and the air outlet 41 are both arranged on the front panel, that is, a forward air inlet and forward air outlet air flow circuit is formed. In this air flow circuit, the air flow direction will have an approximate 180-degree turn, and the air flow in the air duct needs to turn multiple times, resulting in a large air flow loss, which in turn leads to a small air outlet volume and a short air supply distance of the air conditioner, affecting the user experience.

[0057] In this embodiment, by arranging a second air inlet 31 and an air outlet 41 on the first side wall 11, and arranging an air outlet air wheel 43 in the air outlet duct 42, a part of the air in front of the first side wall 11 is sucked by the air outlet air wheel 43 and enters the air outlet air wheel 43 through the second air inlet 31, the second air inlet duct 32 and the second inlet 45, and then is blown out of the air outlet 41 by the air outlet air wheel 43. The air outlet air wheel 43 can be a cross-flow air wheel, a centrifugal air wheel, an axial-flow air wheel, etc., and can be selected and arranged in the air outlet duct 42 as needed. The first inlet 44 and the second inlet 45 are the suction air inlets of the air outlet air wheel 43. The first inlet 44 and the second inlet 45 can be two adjacent air inlets or two spaced-apart air inlets, and there is no limitation here.

[0058] By arranging a first air inlet 21 on the first side wall 11 and arranging a first air inlet air wheel 23 in the first air inlet duct 22, a part of the air in front of the first side wall 11 enters the air outlet air wheel 43 through the first air inlet 21, the first air inlet duct 22 and the first inlet 44 under the combined action of the suction of the first air inlet air wheel 23 and the air outlet air wheel 43, and then is blown out of the air outlet 41 by the air outlet air wheel 43. The first air inlet air wheel 23 can be a cross-flow air wheel, a centrifugal air wheel, an axial-flow air wheel, etc., and can be selected and arranged in the first air inlet duct 22 as needed. Since the first air inlet duct 22 and the first air inlet air wheel 23 can supply air to the air outlet air wheel 43, by increasing the flow rate of the inlet air flow, the air flow loss caused by the large change in the air flow direction is compensated, and the effect of increasing the air outlet volume and the air supply distance of the air conditioner is achieved.

[0059] In this embodiment, the first motor 81 can be drivingly connected to the air outlet air wheel 43 and the first air inlet air wheel 23 through a transmission mechanism 82. The transmission mechanism 82 can be a belt transmission mechanism, a chain transmission mechanism, a gear mechanism, etc. For example, the first motor 81 can be coaxially fixedly connected to the air outlet air wheel 43 and drivingly connected to the first air inlet air wheel 23 through a gear mechanism. Another example is that the first motor 81 can be arranged between the air outlet air wheel 43 and the first air inlet air wheel 23 and drivingly connected to the air outlet air wheel 43 and the first air inlet air wheel 23 respectively through two belt transmission mechanisms.

[0060] By driving both the air outlet impeller 43 and the first air inlet impeller 23 to the first motor 81, the air inlet impeller motor can be omitted, achieving the effect of reducing the production cost of the air conditioner.

[0061] It should be understood that the specific position of the heat exchanger 60 of the air conditioner in this embodiment is not limited. The heat exchanger 60 can be arranged in the first air inlet duct 22, the second air inlet duct 32, the air outlet duct 42, etc., for adjusting the temperature, humidity, etc. of the incoming air flow or the outgoing air flow.

[0062] In some embodiments of the air conditioner of the present utility model, such as Figure 2 and Figure 4 as shown, a third air inlet 51 is further provided on the first side wall 11 of the housing 10, and the third air inlet 51 is located above or below the second air inlet 31.

[0063] The inner side of the third air inlet 51 is connected with a third air inlet duct 52, and the outlet end 54 of the third air inlet duct is located in the first air inlet duct 22. A second air inlet impeller 53 is arranged in the third air inlet duct 52.

[0064] The first motor 81 is also drivingly connected to the second air inlet impeller 53.

[0065] The third air inlet duct 52 and the second air inlet impeller 53 are used to further supplement the incoming air volume for the air outlet impeller 43. The second air inlet impeller 53 can be a cross-flow impeller, a centrifugal impeller, an axial-flow impeller, etc., and can be selected and arranged in the third air inlet duct 52 according to needs. The first motor 81 can be drivingly connected to the second air inlet impeller 53 through a belt drive mechanism, a chain drive mechanism, a gear mechanism, etc. In this way, the air inlet impeller motor can be omitted, achieving the effect of further reducing the production cost of the air conditioner.

[0066] Since the first air inlet 21 is farther from the air outlet impeller 43 and the air outlet 41 than the second air inlet 31, the length of the first air inlet duct 22 is greater than the length of the second air inlet duct 32, and the resistance of the duct to the air flow is relatively large. In this embodiment, to further enhance the air flow volume in the first air inlet duct 22, the third air inlet duct 52 and the second air inlet impeller 53 are introduced. The second air inlet impeller 53 is used to suck the air in front of the third air inlet 51 into the third air inlet duct 52, and then discharge it from the outlet end 54 of the third air inlet duct into the first air inlet duct 22, so as to increase the incoming air volume and the outgoing air volume of the air outlet impeller 43.

[0067] In some embodiments of the air conditioner of the present utility model, such as Figures 2 - 4 as shown, both the air outlet impeller 43 and the first air inlet impeller 23 are cross-flow impellers and are both arranged vertically.

[0068] The air conditioner further includes a heat exchanger 60 arranged vertically. The heat exchanger 60 is located on a side of the first inlet 44 and the second inlet 45 away from the air outlet impeller 43 .

[0069] The outlet end 54 of the third air inlet duct is located between the first air inlet impeller 23 and the heat exchanger 60 .

[0070] In this embodiment, the outlet wind wheel 43 and the first inlet wind wheel 23 are crossflow wind wheels, and are both arranged vertically. Correspondingly, the first inlet air duct 22 and the outlet air duct 42 can both be provided with a volute structure and a volute tongue structure. The crossflow wind wheel is a crossflow wind wheel. Based on the aerodynamic characteristics of the crossflow wind wheel, the inlet wind wheel and the outlet wind wheel 43 can generate a large amount of air on the one hand, and on the other hand, while providing power for the airflow, they can also change the angle of the airflow direction.

[0071] like Figure 3 As shown, by setting the air inlet impeller parallel to the air outlet impeller 43, the first air inlet impeller 23 and the air outlet impeller 43 can be set at two key nodes where the wind path turns, the first air inlet impeller 23 can cause the airflow of the first air inlet 21 to turn toward the air outlet impeller 43, and the air outlet impeller 43 can cause the airflow at the ends of the first air inlet duct 22 and the second air inlet duct 32 to turn toward the air outlet 41. In this way, the advantage of the crossflow impeller changing the angle of the airflow direction can be fully utilized to reduce the wind loss when the airflow turns, and further increase the air volume and air supply distance of the air conditioner.

[0072] In this embodiment, the heat exchanger 60 is arranged on the inlet side of the air outlet impeller 43. Figure 3 As shown, the heat exchanger 60 is arranged at the front end of the volute and the volute tongue of the air outlet impeller 43. The first inlet 44 and the second inlet 45 together form the inlet angle of the air outlet impeller 43. Figure 3 As shown, the first inlet 44 and the second inlet 45 are connected at one end close to each other, the other end of the first inlet 44 extends to the rear end of the volute of the air outlet duct 42, and the other end of the second inlet 45 extends to the rear end of the volute tongue of the air outlet duct 42. The heat exchanger 60 is arranged on the inlet side of the air outlet impeller 43, which is used to adjust the temperature and humidity of the airflow of the air outlet impeller 43 on the one hand, and can also rectify the airflow passing through the heat exchanger 60 on the other hand to prevent the formation of turbulence inside the air outlet impeller 43.

[0073] In some embodiments of the air conditioner of the present utility model, as Figures 4 - 6 As shown, the third air inlet 51 is located on the upper side of the second air inlet 31. The first motor 81 is coaxially fixedly connected to the rotating shaft at the upper end of the air outlet impeller 43. The second air inlet impeller 53 is coaxially fixedly connected to the rotating shaft at the upper end of the first air inlet impeller 23. The first motor 81 is connected to the first air inlet impeller 23 and the second air inlet impeller 53 through a transmission mechanism 82.

[0074] In this embodiment, the third air inlet 51 is located above the second air inlet 31, for example, at the top cover of the first side wall 11 close to the housing 10. The second air inlet impeller 53 can suck air from a relatively high position from the third air inlet 51, transport it to the upstream of the heat exchanger 60, and blow it out through the air outlet 41 under the action of the air outlet impeller 43 after heat exchange and temperature adjustment. In this way, when the air conditioner is cooling, it can heat exchange and cool the relatively high temperature air, thereby improving the indoor temperature stratification, preventing the head from being hot and the feet from being cold, and achieving the effect of improving the user experience.

[0075] like Figures 5 - 6 As shown, in some embodiments of the air conditioner of the utility model, the first motor 81 can be a double-shaft motor, the lower output shaft of the double-shaft motor is coaxially fixedly connected to the rotating shaft at the upper end of the air outlet wheel 43, and the upper output shaft of the double-shaft motor is connected to a pulley. The second air inlet wheel 53 is coaxially fixedly connected to the rotating shaft at the upper end of the first air inlet wheel 23, and the upper end of the second air inlet wheel is connected to a pulley. The two pulleys are connected by a transmission belt. In this way, on the one hand, the transmission efficiency of the first motor 81 and the air outlet wheel 43 is high, and sufficient power can be transmitted to the air outlet wheel 43. On the other hand, it can ensure that the rotation speed of the first air inlet wheel 23 and the second air inlet wheel 53 is always proportional to the rotation speed of the air outlet wheel 43, so that the ratio of the air inlet flow rate of the first air inlet duct 22 and the third air inlet duct 52 to the air outlet flow rate of the air outlet duct 42 remains stable, preventing the three wind wheels from wasting energy due to mismatched flow rates.

[0076] like Figure 7 As shown, in some embodiments of the air conditioner of the utility model, the first motor 81 can also be a single-shaft motor, and the lower output shaft of the single-shaft motor is coaxially fixedly connected to the rotating shaft at the upper end of the air outlet fan wheel 43, and connected to a pulley. The second air inlet fan wheel is coaxially fixedly connected to the rotating shaft at the upper end of the first air inlet fan wheel 23, and a pulley is connected between the first air inlet fan wheel and the second air inlet fan wheel. The two pulleys are connected by a transmission belt.

[0077] In some embodiments of the air conditioner of the present utility model, the third air inlet 51 is located at the lower side of the second air inlet 31. The first motor 81 is coaxially fixedly connected to the rotating shaft at the lower end of the air outlet impeller 43. The second air inlet impeller 53 is coaxially fixedly connected to the rotating shaft at the lower end of the first air inlet impeller 23. The first motor 81 is transmission-connected to the first air inlet impeller 23 and the second air inlet impeller 53 through a transmission mechanism 82.

[0078] In this embodiment, the third air inlet 51 can be located below the second air inlet 31, for example, at the base of the first side wall 11 close to the housing 10. The second air inlet fan 53 can suck air from a relatively lower position from the third air inlet 51, transport it to the upstream of the heat exchanger 60, and after heat exchange and temperature adjustment, it is blown out through the air outlet 41 under the action of the air outlet fan 43. In this way, when the air conditioner is heating, it can heat exchange and warm the air with a relatively lower temperature, thereby improving the indoor temperature stratification situation, preventing hot head and cold feet, and achieving the effect of improving the user experience.

[0079] In some embodiments of the air conditioner of the present utility model, as Figures 4 - 6 shown, the third air inlet 51 is located above the second air inlet 31. The first motor 81 is coaxially and fixedly connected to the rotating shaft at the upper end of the air outlet fan 43. The second air inlet fan 53 is coaxially and fixedly connected to the rotating shaft at the upper end of the first air inlet fan 23. The first motor 81 is connected to the first air inlet fan 23 and the second air inlet fan 53 through a transmission mechanism 82.

[0080] The second air inlet fan 53 is a centrifugal fan or an axial flow fan. The inlet side 531 of the second air inlet fan faces upward. The outlet end 54 of the third air inlet duct faces downward.

[0081] The centrifugal fan and the axial flow fan have a small volume, which can reduce the overall volume of the air conditioner. The inlet side 531 of the second air inlet fan faces upward, and a duct 55 can be provided at the outlet side of the second air inlet fan 53, and the duct 55 opens downward. In this way, the second air inlet fan 53 can suck the air at the third air inlet 51 downward into the fan, discharge it downward along the duct 55 to the upstream of the heat exchanger 60, and finally enter the air outlet fan 43. The air path of the third air inlet duct 52 is short, which can minimize the air flow resistance and reduce the air loss.

[0082] In some embodiments of the air conditioner of the present utility model, as Figure 4 shown, the distance L1 from the outlet end 54 of the third air inlet duct to the upper end of the heat exchanger 60 is less than 1 / 4 of the height L2 of the heat exchanger 60.

[0083] Generally speaking, the upper end of the second air inlet 31 is flush with or not much different from the upper end of the heat exchanger 60. When the third air inlet duct 52 is not provided, due to the obstruction of the upper end of the second air inlet 31, the air inlet flow rate in the area near the upper end of the heat exchanger 60 is usually less than that in the middle area of the heat exchanger 60. When refrigerating or heating, the air flow passing through the area near the upper end of the heat exchanger 60 is relatively small, resulting in waste of the heat exchange capacity in the area near the upper end of the heat exchanger 60.

[0084] In this embodiment, by setting L1 to be less than L2 / 4, the air flow flowing out from the outlet end 54 of the third air inlet duct can pass through the area near the upper end of the heat exchanger 60. That is to say, the heat exchange capacity of the area near the upper end of the heat exchanger 60 can be fully utilized, improving the cooling and heating capacities of the air conditioner and also improving the energy efficiency of the air conditioner.

[0085] In some embodiments of the air conditioner of the present utility model, such as Figure 4 shown, the upper end of the first air inlet impeller 23 is lower than the upper end of the heat exchanger 60, and the lower end of the first air inlet impeller 23 is higher than the lower end of the heat exchanger 60. In this way, excessive incoming air flow can be prevented from blocking and staying at the upper and lower ends of the heat exchanger 60, affecting the incoming air flow rate.

[0086] In some embodiments of the air conditioner of the present utility model, such as Figure 3 shown, the heat exchanger 60 includes a first heat exchange section 61 and a second heat exchange section 62 that are fixedly connected. The first heat exchange section 61 is located in the first air inlet duct 22, and the second heat exchange section 62 is located in the second air inlet duct 32.

[0087] The outlet end 54 of the third air inlet duct is located between the first air inlet impeller 23 and the first heat exchange section 61.

[0088] The first heat exchange section 61 can be arranged upstream of the first inlet 44 for heat-exchanging the air flow in the first air inlet duct 22. The second heat exchange section 62 can be arranged upstream of the second inlet 45 for heat-exchanging the air flow in the second air inlet duct 32. The first heat exchange section 61 and the second heat exchange section 62 can be fixedly connected in a butt joint manner, or can be arranged at intervals and fixedly connected by a bracket. When the first heat exchange section 61 and the second heat exchange section 62 are fixedly connected in a butt joint manner, a transition fillet can be provided at the butt joint to reduce the air flow resistance and reduce the generation of turbulence on the front side of the heat exchanger 60.

[0089] The first heat exchange section 61 and the second heat exchange section 62 can have a certain included angle, for example, form an acute angle, to wrap the air inlet side of the air outlet impeller 43 and rectify the air flow in the first air inlet duct 22 and the air flow in the second air inlet duct 32. It can be set according to needs during use.

[0090] In some embodiments of the air conditioner of the present utility model, such as Figure 3 shown, the distance L3 from the axis of the first air inlet impeller 23 to the first side wall 11 is less than the distance L4 from the axis of the air outlet impeller 43 to the first side wall 11. The axes of the first air inlet impeller 23 and the air outlet impeller 43 are on the first plane 70, and the included angle A between the first plane 70 and the first side wall 11 is 5 - 30 degrees.

[0091] The first air inlet duct 22 includes a diffuser duct 221 formed on the outlet side of the first air inlet impeller 23. The diffuser duct 221 is on the side of the first plane 70 away from the first side wall 11. The outlet end 54 of the third air inlet duct is between the diffuser duct 221 and the first heat exchange section 61.

[0092] In this embodiment, the length of the air inlet side of the first air inlet duct 22 (the section between the first air inlet 21 and the first air inlet impeller 23) is less than the length of the air outlet side of the air outlet duct 42 (the section between the air outlet impeller 43 and the air outlet 41). On the one hand, the flow rate of the air outlet duct 42 is the sum of the flow rates of the first air inlet duct 22, the second air inlet duct 32, and the third air inlet duct 52, that is, the flow rate of the first air inlet duct 22 is less than that of the air outlet duct 42. Therefore, the first air inlet duct 22 does not require a long duct to guide the incoming air flow. On the other hand, the air flow blown by the air outlet impeller 43 has a high speed and a large dynamic pressure, and a long duct needs to be provided for pressure diffusion to convert the dynamic pressure into static pressure and then blow it out from the air outlet 41.

[0093] The axes of the first air inlet impeller 23 and the air outlet impeller 43 are on the first plane 70, and the first air inlet 21, the first air inlet impeller 23, the air outlet impeller 43, and the air outlet 41 are approximately at the four corners of a quadrilateral. By reasonably setting the included angle A between the first plane 70 and the first side wall 11, the air path turning angles of the two cross-flow impellers can be reasonably distributed at the first air inlet impeller 23 and the air outlet impeller 43, thereby reducing the air loss during turning.

[0094] When the included angle A between the first plane 70 and the first side wall 11 is too large, the air outlet impeller 43 will bear an excessive air path turning task, and the air path turning ability of the first air inlet impeller 23 will be idle. When the included angle A between the first plane 70 and the first side wall 11 is too small, the distance of the first air inlet duct 22 will be unduly elongated, resulting in more resistance to the air flow in the first air inlet duct 22. Or, when the included angle A between the first plane 70 and the first side wall 11 is too small, the distance of the air outlet duct 42 will be unduly shortened, resulting in insufficient pressure diffusion. 5 - 30 degrees is a preferred angle after comprehensively considering the above factors.

[0095] In this embodiment, the diffuser duct 221 is used to diffuse the air flow on the outlet side of the first air inlet impeller 23, convert the dynamic pressure of the air flow into static pressure, increase the static pressure in the area of the heat exchanger 60 away from the air outlet duct 42, increase the pressure difference between the two sides of the heat exchanger 60, and promote the air flow to quickly enter the air outlet impeller 43.

[0096] The diffuser duct 221 is located at the rear side of the first plane 70, such that the air flow in the diffuser duct 221 mainly enters the air outlet impeller 43 through the first heat exchange section 61 and the first inlet 44, preventing the air flow in the diffuser duct 221 from interfering with or colliding with the air flow in the second air inlet duct 32 and avoiding wind loss.

[0097] In this embodiment, the outlet end 54 of the third air inlet duct is arranged between the diffuser duct 221 and the first heat exchange section 61. Thus, the air pressure in the upstream area of the first heat exchange section 61 can be further increased, the pressure difference between the upstream and downstream of the first heat exchange section 61 can be increased, and the air flow can be promoted to quickly enter the air outlet impeller 43, thereby increasing the air inlet flow rate and air outlet flow rate of the air outlet impeller 43. One reason for not arranging the outlet end 54 of the third air inlet duct in the second air inlet duct 32 is that since the second air inlet duct 32 is a passive air inlet duct and only relies on the suction of the air outlet impeller 43 for air inlet. When the outlet end 54 of the third air inlet duct is arranged in the second air inlet duct 32, the negative pressure at the second air inlet 31 may be reduced, affecting the air inlet flow rate of the second air inlet 31.

[0098] In some embodiments of the air conditioner of the present utility model, such as Figure 3 shown, a volute side wall 222 and a scroll tongue side wall 223 are arranged on the outlet side of the first air inlet impeller 23. The diffuser duct 221 is formed between the volute side wall 222 and the scroll tongue side wall 223.

[0099] The scroll tongue side wall 223 is located on the side of the volute side wall 222 close to the first side wall 11. The angle B between the scroll tongue side wall 223 and the first plane 70 is 0 - 15 degrees.

[0100] In this embodiment, the scroll tongue side wall 223 is connected to the end of the scroll tongue and is used to guide the air flow on the outlet side of the first air inlet impeller 23. The scroll tongue side wall 223 can be linear or arc-shaped. When the scroll tongue side wall 223 is arc-shaped, the angle between the scroll tongue side wall 223 and the first plane 70 is the angle formed by the extension line of the end of the scroll tongue side wall 223 and the first plane 70.

[0101] Due to the aerodynamic characteristics of the cross-flow impeller, the air flow in the diffuser duct 221 has strong dynamic pressure. By defining that the angle B between the scroll tongue side wall 223 and the first plane 70 is greater than or equal to 0 degrees, it can be avoided that the air flow in the diffuser duct 221 enters the second air inlet duct 32 forward after passing through the scroll tongue side wall 223, interfering with or colliding with the air flow in the second air inlet duct 32 and avoiding wind loss. By defining that the angle B between the scroll tongue side wall 223 and the first plane 70 is less than or equal to 15 degrees, on the one hand, the air flow direction in the diffuser duct 221 can be restricted, avoiding excessive deviation from the first inlet 44 of the air outlet impeller 43 and causing unnecessary wind loss. It can promote the air flow flowing out of the diffuser duct 221 to smoothly and quickly enter the air outlet impeller 43 through the first heat exchange section 61.

[0102] On the other hand, the diffuser duct 221 is provided at the rear side of the second air inlet duct 32. Under the action of the first air inlet impeller 23, the velocity of the air flow in the first air inlet duct 22 is greater than that of the air flow at the rear end of the second air inlet duct 32, which can cause the air flow at the rear end of the second air inlet duct 32 to be sucked into the first air inlet duct 22, and then enter the air outlet impeller 43 through the first heat exchange section 61. In this way, the total air inlet flow rate of the second air inlet duct 32 can be increased, thereby increasing the total air outlet volume of the air outlet duct 42.

[0103] In some embodiments of the air conditioner of the present invention, such as Figure 3 shown, the included angle C between the first heat exchange section 61 and the volute tongue side wall 223 is 110 - 170 degrees.

[0104] Although the dynamic pressure of the air flow flowing out of the diffuser duct 221 is still relatively large after diffusion, a large amount of energy loss will be formed when it collides with the front surface of the first heat exchange section 61 head-on. By setting the included angle C between the first heat exchange section 61 and the volute tongue side wall 223, the flow direction of the air flow flowing out of the diffuser duct 221 forms an acute angle with the air inlet surface of the first heat exchange section 61, which promotes the air flow to enter the air outlet impeller 43 under the action of the pressure difference. On the other hand, this angle also makes the air outlet surface of the first heat exchange section 61 face the air outlet impeller 43, and the first heat exchange section 61 can also rectify the passing air flow, thereby reducing the formation of turbulent flow when the air flow enters the air outlet impeller 43.

[0105] In some embodiments of the air conditioner of the present invention, such as Figure 3 shown, the included angle D between the second heat exchange section 62 and the first side wall 11 is 55 - 85 degrees.

[0106] The air outlet impeller 43 is located at the side rear of the second heat exchange section 62 ( Figure 3 in the rear right), by setting the included angle D between the second heat exchange section 62 and the first side wall 11, the flow direction of the air flow flowing out of the second air inlet duct 32 forms an acute angle with the air inlet surface of the second heat exchange section 62, which promotes the air flow to enter the air outlet impeller 43 under the action of the pressure difference. On the other hand, this angle also makes the air outlet surface of the second heat exchange section 62 face the air outlet impeller 43, and the second heat exchange section 62 can also rectify the passing air flow, thereby reducing the formation of turbulent flow when the air flow enters the air outlet impeller 43.

[0107] Up to this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and determined to cover all these other variations or modifications.

Claims

1. A cabinet air conditioner, characterized in that: include: A casing, wherein a first air inlet, a second air inlet and an air outlet are sequentially arranged in a lateral direction on a first side wall of the casing; the second air inlet is located between the first air inlet and the air outlet; an air outlet duct, wherein the outlet of the air outlet duct is connected to the air outlet; an air outlet wheel is arranged in the air outlet duct; the inlet side of the air outlet wheel comprises a first inlet and a second inlet, and the second inlet is located on a side of the first inlet close to the first side wall; A first air inlet duct, wherein the first air inlet duct is formed between the first air inlet and the first inlet, and a first air inlet impeller is disposed in the first air inlet duct; a second air inlet duct, the second air inlet duct being formed between the second air inlet and the second inlet; A first motor is connected in transmission connection with the air outlet impeller and the first air inlet impeller.

2. The air conditioner according to claim 1, characterized in that: A third air inlet is also provided on the first side wall of the housing, and the third air inlet is located above or below the second air inlet; The inner side of the third air inlet is connected to a third air inlet duct, and the outlet end of the third air inlet duct is located in the first air inlet duct; a second air inlet impeller is arranged in the third air inlet duct; The first motor is also drivingly connected to the second air inlet impeller.

3. The air conditioner according to claim 2, characterized in that: The air outlet wind wheel and the first air inlet wind wheel are both cross-flow wind wheels, and are both arranged vertically; The air conditioner further comprises a heat exchanger arranged in a vertical direction, wherein the heat exchanger is located at a side of the first inlet and the second inlet away from the air outlet wheel; An outlet end of the third air inlet duct is located between the first air inlet wheel and the heat exchanger.

4. The air conditioner according to claim 3, characterized in that: The third air inlet is located above the second air inlet; the first motor is coaxially fixedly connected to the rotating shaft at the upper end of the air outlet fan wheel; the second air inlet fan wheel is coaxially fixedly connected to the rotating shaft at the upper end of the first air inlet fan wheel; the first motor is connected to the first air inlet fan wheel and the second air inlet fan wheel through a transmission mechanism; or The third air inlet is located at the lower side of the second air inlet; the first motor is coaxially fixedly connected to the rotating shaft at the lower end of the air outlet wheel; the second air inlet wheel is coaxially fixedly connected to the rotating shaft at the lower end of the first air inlet wheel; the first motor is connected to the first air inlet wheel and the second air inlet wheel through a transmission mechanism.

5. The air conditioner according to claim 3, characterized in that: The third air inlet is located on the upper side of the second air inlet; the first motor is coaxially fixedly connected to the rotating shaft at the upper end of the air outlet fan wheel; the second air inlet fan wheel is coaxially fixedly connected to the rotating shaft at the upper end of the first air inlet fan wheel; the first motor is connected to the first air inlet fan wheel and the second air inlet fan wheel through a transmission mechanism; The second air inlet wind wheel is a centrifugal wind wheel or an axial flow wind wheel; the inlet side of the second air inlet wind wheel opens upward; the outlet end of the third air inlet duct opens downward.

6. The air conditioner according to claim 5, characterized in that: The distance between the outlet end of the third air inlet duct and the upper end of the heat exchanger is less than 1 / 4 of the height of the heat exchanger; and / or The upper end of the first air inlet wind wheel is lower than the upper end of the heat exchanger, and the lower end of the first air inlet wind wheel is higher than the lower end of the heat exchanger.

7. The air conditioner according to claim 3, characterized in that: The heat exchanger comprises a first heat exchange section and a second heat exchange section which are fixedly connected; the first heat exchange section is located in the first air inlet duct, and the second heat exchange section is located in the second air inlet duct; An outlet end of the third air inlet duct is located between the first air inlet wheel and the first heat exchange section.

8. The air conditioner according to claim 7, characterized in that: The distance between the axis of the first air inlet wind wheel and the first side wall is smaller than the distance between the axis of the air outlet wind wheel and the first side wall; the axis of the first air inlet wind wheel and the axis of the air outlet wind wheel are on a first plane, and the angle between the first plane and the first side wall is 5-30 degrees; The first air inlet duct includes a pressure diffuser duct formed on the outlet side of the first air inlet wheel; the pressure diffuser duct is located on the side of the first plane away from the first side wall; the outlet end of the third air inlet duct is located between the pressure diffuser duct and the first heat exchange section.

9. The air conditioner according to claim 8, characterized in that: The outlet side of the first air inlet impeller is provided with a volute side wall and a volute tongue side wall; the pressure diffuser duct is formed between the volute side wall and the volute tongue side wall; The volute tongue side profile wall is located on a side of the volute case side profile wall close to the first side wall; an angle between the volute tongue side profile wall and the first plane is 0-15 degrees.

10. The air conditioner according to claim 9, characterized in that: The included angle between the first heat exchange section and the volute tongue side wall is 110-170 degrees; and / or The included angle between the second heat exchange section and the first side wall is 55-85 degrees.

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