Cabinet air conditioner and control method thereof

Abstract

The invention provides a cabinet air conditioner and a control method thereof.The cabinet air conditioner comprises a whole machine shell, a lower air opening, an air inlet and an upper air opening are sequentially formed in the whole machine shell from low to high in the height direction of the whole machine shell, and an upper axial flow fan, a lower axial flow fan and an indoor heat exchanger are assembled in an internal containing space of the whole machine shell; the indoor heat exchanger is located on the inner side of the air inlet, the upper axial flow fan is located between the upper air opening and the top end of the indoor heat exchanger, the lower axial flow fan is located between the lower air opening and the bottom end of the indoor heat exchanger, and the upper axial flow fan and the lower axial flow fan are both bidirectional rotating fans. According to the cabinet type air conditioner, multiple air supply modes of surrounding air supply of up-down simultaneous air supply, shower type air supply of full-up air supply and carpet type air supply of full-down air supply of the cabinet type air conditioner are achieved, the comfort of a user is improved, meanwhile, the air inlet area can be remarkably increased, the air inlet amount and the air outlet amount are increased, large-circulation flowing of airflow in the temperature adjusting space can be promoted, and the temperature adjusting effect is improved. And the temperature can be quickly adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to a cabinet air conditioner and a control method thereof. Background Art

[0002] Most of the existing air conditioners with top and bottom air outlets are centrifugal fans. When the power components are multi-stage centrifugal fans, their multi-duct layout increases the size of the entire machine, makes the overall layout structure complex, has more moving mechanisms, and the connection and coordination between the multiple ducts are complex, resulting in a high cost of the entire machine. It is generally concentrated in high-end cabinets and has a small market share. Based on the above-mentioned problems, a cabinet air conditioner with up and down air outlets using an axial flow fan is proposed in the prior art. The cabinet air conditioner using an axial flow fan has the advantages of large flow coefficient, simple structure, larger fan air volume and relatively small power consumption at the same noise level. However, in the existing cabinet air conditioner with up and down air outlets, when operating in the down air outlet mode, the upper air port serves as the air inlet, and when operating in the up air outlet mode, the lower air port serves as the air inlet. The heat exchanger is arranged in the air duct between the upper air port and the lower air port, and the heat exchanger is mostly designed to be arranged roughly around the cabinet casing so that the air inlet can be arranged on multiple sides of the cabinet casing, thereby increasing the air inlet area. However, the cabinet air conditioner with this air supply mode is limited by the overall diameter size of the cabinet air conditioner (or the front and rear thickness and the left and right width size) and the limitation of the air outlet direction when the reversible air inlet and outlet is used as the air outlet. Therefore, the air inlet area of ​​the heat exchanger is small when the air port is used as the air inlet. Summary of the invention

[0003] Therefore, the present invention provides a cabinet air conditioner and a control method thereof, which can overcome the technical problem in the related art that the cabinet air conditioner with upper and lower air inlet and outlet has a small air inlet area, resulting in a small air outlet volume.

[0004] In order to solve the above problems, the present invention provides a cabinet air conditioner, including an entire machine casing, wherein a downwind port, an air inlet and an upwind port are sequentially arranged along the height direction of the entire machine casing from low to high, and an upper axial flow fan, a lower axial flow fan and an indoor heat exchanger are assembled in an internal accommodating space of the entire machine casing, wherein the indoor heat exchanger is located on the inner side of the air inlet, the upper axial flow fan is located between the upper wind port and the top end of the indoor heat exchanger, the lower axial flow fan is located between the downwind port and the bottom end of the indoor heat exchanger, and the upper axial flow fan and the lower axial flow fan are both bidirectional rotating fans.

[0005] In some embodiments, the height of the whole machine casing is H, the height of the air inlet is h, 0.45H≥h≥0.38H, and the air inlet is within the plane coverage area of ​​the air inlet heat exchange core of the indoor heat exchanger.

[0006] In some embodiments, an upper air duct is provided in the top area of ​​the internal accommodating space, the upper axial flow fan is located between the upper air duct and the indoor heat exchanger, and the upper air port is arranged corresponding to the outer port of the upper air duct, a first vortex-breaking structure is provided in the central area of ​​the upper air duct, and the first vortex-breaking structure extends along the airflow guiding direction of the upper air duct.

[0007] In some embodiments, the airflow guiding direction of the upper air duct is the height direction, and the cross-sectional area of ​​the first vortex-breaking structure increases from bottom to top.

[0008] In some embodiments, the cross-section of the first vortex-breaking structure is an ellipse, and the major axis of the ellipse extends front to back, and the minor axis extends left to right.

[0009] In some embodiments, the central axis section of the upper air duct on the left-right symmetric plane of the whole machine housing is a hyperbola that meets the following formula:

[0010] Among them, 135≤a≤152, 102.5≤b≤104.

[0011] In some embodiments, the maximum diameter of the upper air duct is C, the major axis of the ellipse with the maximum cross-section of the first vortex-breaking structure is c1, and the minor axis is d1, 0.15C≤c1≤0.18C, 0.1C≤d1≤0.12C; the major axis of the ellipse with the minimum cross-section of the first vortex-breaking structure is c2, and the minor axis is d2, 0.06C≤c2≤0.08C, 0.04C≤d2≤0.06C.

[0012] In some embodiments, a downwind duct is provided in the bottom area of ​​the internal accommodating space, the lower axial flow fan is located between the downwind duct and the indoor heat exchanger, and the downwind port is arranged corresponding to the outer port of the downwind duct, a second vortex-breaking structure is provided in the central area of ​​the downwind duct, and the second vortex-breaking structure extends along the airflow guiding direction of the downwind duct.

[0013] In some embodiments, the airflow guiding direction of the downwind duct smoothly changes from an up-and-down vertical direction to a front-and-back horizontal arc direction, and the cross-sectional area of ​​the second vortex-breaking structure becomes smaller from top to bottom.

[0014] In some embodiments, the central axis section of the downwind duct on the left-right symmetric plane of the whole machine housing is a parabola that meets the following formula:

[0015] y=px 2 , where 0.0028≤p≤0.0031.

[0016] In some embodiments, on the central axis section of the downwind duct on the left-right symmetrical plane of the entire machine casing, the inner port diameter of the downwind duct is E, the outer port diameter is F, the cross-section of the second vortex-breaking structure is circular, the radius of the circle of the maximum cross-section of the second vortex-breaking structure is 0.11E≤e≤0.135E, and the radius of the circle of the minimum cross-section of the second vortex-breaking structure is 0.04F≤f≤0.055F.

[0017] The present invention also provides a control method for the cabinet air conditioner as described above, comprising the following steps:

[0018] Get air conditioner control instructions;

[0019] When the control instruction is a simultaneous upper and lower air supply mode, the upper axial flow fan is controlled to operate so that part of the airflow entering the internal accommodating space through the air inlet and the indoor heat exchanger is delivered through the upper air outlet, and the lower axial flow fan is controlled to operate so that another part of the airflow entering the internal accommodating space through the air inlet and the indoor heat exchanger is delivered through the lower air outlet; or,

[0020] When the control instruction is the full upper air supply mode, the upper axial flow fan is controlled to operate so that the external air flows into the internal accommodation space through the lower air port and the air inlet and is delivered through the upper air port; or

[0021] When the control instruction is the full downward air supply mode, the downward axial flow fan is controlled to operate so that the external air flow enters the internal accommodating space through the upper air port and the air inlet and is delivered through the downward air port.

[0022] In some embodiments,

[0023] When the control instruction is the full upper air supply mode, the lower axial flow fan is also controlled to operate so that the airflow enters the internal accommodation space through the lower air port; or

[0024] When the control instruction is the full downward air supply mode, the upper axial flow fan is also controlled to operate so that the airflow enters the internal accommodating space through the upper air port.

[0025] The cabinet air conditioner and control method thereof provided by the present invention have the following beneficial effects:

[0026] A bidirectionally rotating lower axial flow fan is arranged between the downwind port and the bottom end of the indoor heat exchanger, and a bidirectionally rotating upper axial flow fan is arranged between the upwind port and the top end of the indoor heat exchanger. The indoor heat exchanger is matched with the air inlet between the downwind port and the upwind port. Therefore, by controlling the rotation direction of the upper axial flow fan and the lower axial flow fan, various air supply modes of the cabinet air conditioner, such as surround air supply with upper and lower air supply, shower-style air supply with upper air supply, and carpet-style air supply with lower air supply, can be realized. While improving user comfort, the air intake area can be significantly increased, thereby increasing the air intake and air outlet volume (in the all-up air supply mode, both the downwind port and the air inlet intake air at the same time, and in the all-down air supply mode, both the upper air port and the air inlet intake air at the same time), which can promote the large circulation of airflow in the temperature control space, and is conducive to the rapid adjustment of the temperature of the temperature control space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0028] Figure 1 Schematic diagram of the external structure of the cabinet air conditioner in the embodiment of the present invention (partial perspective);

[0029] Figure 2 yes Figure 1 An internal cross-sectional view of a cabinet air conditioner;

[0030] Figure 3 Schematic diagram of air flow when the cabinet air conditioner in the embodiment of the present invention operates in a top and bottom simultaneous air supply mode;

[0031] Figure 4 is a schematic diagram of air flow when the cabinet air conditioner in the embodiment of the present invention operates in a full upper air supply mode;

[0032] Figure 5 is a schematic diagram of air flow when the cabinet air conditioner in the embodiment of the present invention operates in a full down-air supply mode;

[0033] Figure 6 This is the airflow pressure cloud diagram of the cabinet air conditioner in the present application when the upper and lower air duct lines are not optimized and the vortex breaking structure is not provided and air is supplied from the upper and lower parts simultaneously. It can be seen from the figure that the negative pressure of the airflow in the central area of ​​the upper and lower air outlets is higher than that in the peripheral area;

[0034] Figure 7This is the air flow velocity vector diagram of the cabinet air conditioner (axial flow fan) in the present application when the upper and lower air duct lines are not optimized and the vortex breaking structure is not set and the upper and lower air are supplied simultaneously. It can be seen from the figure that the air flow backflow phenomenon in the central area of ​​the upper and lower air outlets is more serious;

[0035] Figure 8 This is a cloud diagram of the air flow velocity of the cabinet air conditioner (axial flow fan) in the present application when the upper and lower air duct lines are not optimized and the vortex breaking structure is not provided and air is supplied from the upper and lower sides simultaneously. It can be seen from the figure that the air flow velocity in the central area of ​​the upper and lower air outlets is relatively low;

[0036] Fig. 9 It is the velocity vector diagram of the supply airflow when the corresponding duct lines in the upper and lower air outlets are set with the corresponding vortex-breaking structures and the air is supplied simultaneously from top to bottom.

[0037] The accompanying drawings are marked as follows:

[0038] 1. Machine casing; 10. Internal accommodation space; 11. Downwind outlet; 12. Air inlet; 13. Upwind outlet; 21. Upward axial flow fan; 22. Downward axial flow fan; 3. Indoor heat exchanger; 4. Upwind duct; 41. First vortex-breaking structure; 5. Downwind duct; 51. Second vortex-breaking structure. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] See also Figures 1 to 9 As shown, according to an embodiment of the present invention, a cabinet air conditioner is provided, comprising an entire machine casing 1, wherein a downwind port 11, an air inlet 12 and an upwind port 13 are sequentially arranged along the height direction of the entire machine casing 1 from low to high, wherein an upper axial flow fan 21, a lower axial flow fan 22 and an indoor heat exchanger 3 are assembled in an internal accommodating space 10 of the entire machine casing 1, wherein the indoor heat exchanger 3 is located on the inner side of the air inlet 12, the upper axial flow fan 21 is located between the upper wind port 13 and the top end of the indoor heat exchanger 3, the lower axial flow fan 22 is located between the downwind port 11 and the bottom end of the indoor heat exchanger 3, and the upper axial flow fan 21 and the lower axial flow fan 22 are both bidirectional rotating fans, that is, the upper axial flow fan 21 and the lower axial flow fan 22 can be controlled to rotate forward or reverse, thereby realizing selective control of the airflow driving direction.

[0044] In this technical solution, a bidirectionally rotating lower axial flow fan 22 is arranged between the lower air outlet 11 and the bottom end of the indoor heat exchanger 3, and a bidirectionally rotating upper axial flow fan 21 is arranged between the upper air outlet 13 and the top end of the indoor heat exchanger 3. The indoor heat exchanger 3 is arranged in a corresponding matching manner with the air inlet 12 located between the lower air outlet 11 and the upper air outlet 13. Therefore, by controlling the rotation direction of the upper axial flow fan 21 and the lower axial flow fan 22, a variety of air supply modes of the cabinet air conditioner, such as surround air supply with upper and lower air supply, shower-style air supply with upper air supply, and carpet-style air supply with lower air supply, can be realized. While improving user comfort, the air intake area can be significantly increased, thereby increasing the air intake and air outlet volume (in the upper air supply mode, the lower air outlet 11 and the air inlet 12 both intake air at the same time, and in the lower air supply mode, the upper air outlet 13 and the air inlet 12 both intake air at the same time), which can promote the large circulation of airflow in the temperature control space, which is conducive to the rapid adjustment of the temperature of the temperature control space.

[0045] In some embodiments, the height of the whole machine casing 1 is H, the height of the air inlet 12 is h, 0.45H≥h≥0.38H, and the air inlet 12 is located within the plane coverage area of ​​the air inlet heat exchange core of the indoor heat exchanger 3 to ensure that the size of the indoor heat exchanger 3 can be designed to be relatively large, ensuring the heat exchange area and heat exchange effect.

[0046] In some embodiments, with reference to the orientation of the cabinet air conditioner in use, the front-to-back thickness of the internal accommodating space 10 is greater than its left-to-right width. In terms of overall appearance, the front-to-back thickness of the entire housing 1 is correspondingly greater than its left-to-right width. In this technical solution, the direction of the front-to-back thickness of the internal accommodating space 10 corresponds to the direction of the air inlet side and the air outlet side of the indoor heat exchanger 3, so that the air inlet airflow entering the indoor heat exchanger 3 for heat exchange at the air inlet 12 can be prevented from turning too large and too quickly when flowing out of the air outlet side of the indoor heat exchanger 3, resulting in excessive wind loss and excessive airflow noise. At the same time, it can also ensure that the airflow flow area here is larger when the upper air inlet 13 or the lower air inlet 11 is used as the air inlet, ensuring the smooth flow of the total airflow of the air inlet 12 and one of the upper and lower air inlets. In a preferred embodiment, when projected on a horizontal plane, the projection shape of the entire housing 1 and the internal accommodating space 10 is an ellipse, the major axis of the ellipse extends front and back, and the minor axis extends left and right, which improves the overall appearance of the cabinet air conditioner.

[0047] For specific combination, see Figures 6 to 8As shown, since the upper axial flow fan 21 and the lower axial flow fan 22 in the present invention are respectively located above the top end and below the bottom end of the indoor heat exchanger 3, they are relatively close to the upper air outlet 13 and the lower air outlet 11. Especially when the overall height of the cabinet air conditioner is relatively low, the distance between the two axial flow fans and the upper and lower air outlets is relatively closer, which results in that when the upper air outlet 13 or the lower air outlet 11 is used as the air outlet, that is, the air supply outlet, the air supply airflow generates a large negative pressure in the central area of ​​the air outlet, which leads to the occurrence of air flow back suction, which reduces the air supply airflow and also reduces the air supply air volume (that is, the air outlet air volume). In order to overcome the above-mentioned shortcomings, in some embodiments, the internal An upper air duct 4 is provided in the top area of ​​the internal accommodating space 10, the upper axial flow fan 21 is located between the upper air duct 4 and the indoor heat exchanger 3, and the upper air port 13 is corresponding to the outer port of the upper air duct 4 (that is, the port of the upper air duct 4 closer to the upper air port 13, and the port far away from the upper air port 13 is called the inner port), and a first vortex-breaking structure 41 is provided in the central area of ​​the upper air duct 4, and the first vortex-breaking structure 41 extends along the airflow guiding direction of the upper air duct 4. It can be understood that the central area of ​​the upper air duct 4 is also the area where negative pressure is generated, which is objectively the area corresponding to the axial direction of the fan wheel shaft of the upper axial flow fan 21.

[0048] In this technical solution, the aforementioned first vortex-breaking structure 41 is arranged in the central area of ​​the upper air duct 4, which occupies the central negative pressure area of ​​the upper air duct 4, thereby ensuring that the airflow in the upper air duct 4 can be sent upward around the first vortex-breaking structure 41, effectively avoiding the airflow back-suction phenomenon caused by the central negative pressure area of ​​the upper air duct 4, thereby ensuring the air supply volume and air supply speed of the upper air outlet 13, and ensuring rapid temperature adjustment when the upper air outlet 13 is used as an air supply outlet.

[0049] In some embodiments, the airflow guiding direction of the upper air duct 4 is the height direction, and the cross-sectional area of ​​the first vortex-breaking structure 41 increases from bottom to top, that is, the first vortex-breaking structure 41 forms a gradually expanding structure along the flow direction of the supply airflow, which can prevent the airflow from being sucked back while guiding the supply airflow of the upper air outlet 13 from vertical air supply to horizontal air supply in a smooth and gradual manner, thereby reducing the air outlet loss of the upper air outlet 13.

[0050] In some embodiments, the cross-section of the first vortex-breaking structure 41 is elliptical, and the major axis of the ellipse extends forward and backward, and the minor axis extends left and right, which is consistent with the state of the elliptical internal accommodating space 10 described above, and guides the airflow more smoothly, preventing wind loss caused by sudden changes in the flow cross-section.

[0051] In some embodiments, the upper air duct 4 is located on the central axis section ( Figure 2 The plane shown) is a hyperbola that satisfies the following formula:

[0052] Among them, 135≤a≤152, 102.5≤b≤104. Figure 2 As shown, the origin O of the rectangular coordinate system corresponding to the curve is located at the midpoint of the central axis of the upper air duct 4.

[0053] In this technical solution, the air duct profile of the upper air duct 4 adopts the aforementioned hyperbolic method, which can further reduce the probability of airflow back-inhalation at the upper air outlet 13, and can guide the air supply airflow more smoothly. The test verifies that when the aforementioned a value and b value are not within the aforementioned range, the back-inhalation phenomenon is weak or cannot be eliminated. When the deviation from the aforementioned range is large, the flow field back-inhalation phenomenon is more severe, and the test air volume does not increase or decreases.

[0054] In some embodiments, the maximum diameter of the upper air duct 4 is C, the major axis of the ellipse with the maximum cross-section of the first vortex-breaking structure is c1, and the minor axis is d1, 0.15C≤c1≤0.18C, 0.1C≤d1≤0.12C; the major axis of the ellipse with the minimum cross-section of the first vortex-breaking structure is c2, and the minor axis is d2, 0.06C≤c2≤0.08C, 0.04C≤d2≤0.06C. The test results show that within this parameter range, the effect of reducing the airflow backflow phenomenon at the air outlet is better, and the air volume is increased more significantly.

[0055] In some embodiments, a downwind duct 5 is provided in the bottom area of ​​the internal accommodating space 10, the lower axial flow fan 22 is located between the downwind duct 5 and the indoor heat exchanger 3, and the downwind port 11 is corresponding to the outer port of the downwind duct 5 (that is, the port of the downwind duct 5 closer to the downwind port 11, and the port far away from the downwind port 11 is called the inner port), and a second vortex-breaking structure 51 is provided in the central area of ​​the downwind duct 5, and the second vortex-breaking structure 51 extends along the airflow guiding direction of the downwind duct 5. It can be understood that the central area of ​​the aforementioned downwind duct 5 is also the area where negative pressure is generated, which is objectively the area corresponding to the axial direction of the fan wheel shaft of the lower axial flow fan 22.

[0056] In this technical solution, the aforementioned second vortex-breaking structure 51 is arranged in the central area of ​​the downwind duct 5, which occupies the central negative pressure area of ​​the downwind duct 5, thereby ensuring that the airflow in the downwind duct 5 can surround the second vortex-breaking structure 51 and be sent to the lower area, effectively avoiding the airflow back-suction phenomenon caused by the central negative pressure area of ​​the downwind duct 5, thereby ensuring the air supply volume and air supply speed of the downwind port 11, and ensuring rapid temperature adjustment when the downwind port 11 is used as an air supply port.

[0057] In some embodiments, the airflow guiding direction of the downwind duct 5 is smoothly changed from vertical to horizontal arc direction, and the cross-sectional area of ​​the second vortex-breaking structure 51 becomes smaller from top to bottom, that is, the second vortex-breaking structure 51 forms a tapered structure along the flow direction of the supply airflow, which can prevent the airflow from being sucked back while reducing the outflow area of ​​the supply airflow of the downwind port 11, reduce the air outlet loss of the downwind port 11, and increase the supply air flow rate.

[0058] In some embodiments, the central axis section of the downwind duct 5 on the left-right symmetric plane of the whole machine housing 1 is a parabola that meets the following formula:

[0059] y=px 2 , where 0.0028≤p≤0.0031. Figure 2 As shown, the origin O of the rectangular coordinate system corresponding to the curve is located at the midpoint of the lower edge of the lower air outlet 11 .

[0060] In this technical solution, the air duct profile of the downwind duct 5 adopts the aforementioned parabolic method, which can further reduce the probability of airflow back-suction at the downwind port 11 and can guide the air supply airflow more smoothly.

[0061] In some embodiments, on the central axis section of the downwind duct 5 on the left-right symmetrical plane of the whole machine housing 1, the inner port diameter of the downwind duct 5 is E, the outer port diameter is F, the cross section of the second vortex-breaking structure 51 is circular, the radius of the circle of the maximum cross section of the second vortex-breaking structure 51 is 0.11E≤e≤0.135E, and the radius of the circle of the minimum cross section of the second vortex-breaking structure 51 is 0.04F≤f≤0.055F. In a specific embodiment, the aforementioned length, width, radius and other related dimensions are all in mm.

[0062] The first vortex-breaking structure 41 and the second vortex-breaking structure 51 may be integrally formed with the upper air duct 4 and the lower air duct 5 by injection molding.

[0063] According to an embodiment of the present invention, there is also provided a control method for the cabinet air conditioner as described above, comprising the following steps:

[0064] Get air conditioner control instructions;

[0065] When the control instruction is the upper and lower simultaneous air supply mode, the upper axial flow fan 21 is controlled to operate so that part of the airflow entering the internal accommodating space 10 through the air inlet 12 and the indoor heat exchanger 3 is delivered through the upper air outlet 13, and the lower axial flow fan 22 is controlled to operate so that another part of the airflow entering the internal accommodating space 10 through the air inlet 12 and the indoor heat exchanger 3 is delivered through the lower air outlet 11. For details, see Figure 3 As shown, when the air conditioner is running, the air flow enters from the air inlet 12 corresponding to the indoor heat exchanger 3, flows through the indoor heat exchanger 3 for heat exchange, enters the air cavity of the internal accommodating space 10, and then flows into the upper axial flow fan 21 and the lower axial flow fan 22 on the upper and lower sides respectively, and the upper air outlet 13 and the lower air outlet 11 simultaneously supply air to realize the upper and lower surrounding air supply; or,

[0066] When the control instruction is the full upper air supply mode, the upper axial flow fan 21 is controlled to operate so that the external air flows into the internal accommodating space 10 through the lower air port 11 and the air inlet 12 and is delivered through the upper air port 13. More preferably, the lower axial flow fan 22 is also controlled to operate so that the air flows into the internal accommodating space 10 through the lower air port 11. For details, see Figure 4 As shown, when the air conditioner is running, the air intake air flows in from the air inlet 12 at the rear side of the air conditioner, flows into the indoor heat exchanger 3 for heat exchange, enters the aforementioned air cavity, is accelerated by the upper axial flow fan 21, and is sent out from the upper air port 13; at the same time, another part of the air intake air flows in from the lower air port 11, is accelerated by the lower axial flow fan 22, enters the air cavity and merges with the air flow flowing out after heat exchange with the indoor heat exchanger 3, forming two winds merged by natural wind and refrigeration cold air, which are accelerated again by the upper axial flow fan 21 and sent out from the upper air port 13, realizing the refrigeration full-up large air volume air supply mode, promoting large circulation of indoor air flow, accelerating heat exchange and realizing rapid cooling; or,

[0067] When the control instruction is the full downward air supply mode, the lower axial flow fan 22 is controlled to operate so that the external air flows into the internal accommodating space 10 through the upper air port 13 and the air inlet 12 and is delivered through the lower air port 11. More preferably, the upper axial flow fan 21 is also controlled to operate so that the air flows into the internal accommodating space 10 through the upper air port 13. For details, see Figure 5 As shown, when the air conditioner is running, the incoming air flow enters from the air inlet 12 on the rear side of the air conditioner, flows into the indoor heat exchanger 3 for heat exchange, enters the aforementioned wind cavity, is accelerated by the lower axial flow fan 22, and is sent out from the lower wind port 11; another part of the incoming air flow enters from the upper wind port 13, is accelerated by the upper axial flow fan 21, enters the wind cavity and merges with the air flow flowing out of the indoor heat exchanger 3, forming two streams of natural wind and heating hot air, which are accelerated again by the lower axial flow fan 22 and sent out from the lower wind port 11, realizing a full-down high-volume air supply mode for heating, promoting a large circulation of indoor air flow, accelerating heat exchange and realizing rapid temperature rise.

[0068] It can be understood that the rotation direction of the upper axial flow fan 21 and the lower axial flow fan 22 is determined according to the driving direction of the airflow. For example, when the upper axial flow fan 21 needs to drive the airflow upward and send it out through the upper air port 13, the rotation of the upper axial flow fan 21 is forward. When the upper axial flow fan 21 needs to drive the airflow downward and inhale it through the upper air port 13, the rotation is reversed accordingly, and so on.

[0069] See Fig. 9 As shown, after the air duct parameters of the cabinet air conditioner in the present invention are optimized, the large vortex areas in the upper and lower air outlets disappear, and the air flow reflux phenomenon (i.e., back suction) is weakened, which can effectively improve the back suction phenomenon at the air outlet, and the unique curve equation makes the air flow transition coherent and smooth, effectively increasing the air supply volume and improving the noise and sound quality during the operation of the air conditioner. The lower air outlet reduction structure treatment can effectively increase the air flow velocity at the air outlet, increase the air supply distance, intensify the indoor air flow circulation, and improve the effective utilization rate of indoor energy. By setting a vortex-breaking structure in the negative pressure zone in the middle of the air duct, the vortex area in the middle of the air duct is broken, which can better guide the air flow outlet direction and reduce flow losses.

[0070] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A cabinet air conditioner, characterized in that: The invention comprises a whole machine casing (1), wherein a downwind port (11), an air inlet (12) and an upwind port (13) are arranged in sequence from low to high along the height direction of the whole machine casing (1); an upper axial flow fan (21), a lower axial flow fan (22) and an indoor heat exchanger (3) are assembled in an internal accommodation space (10) of the whole machine casing (1); wherein the indoor heat exchanger (3) is located on the inner side of the air inlet (12); the upper axial flow fan (21) is located between the upper wind port (13) and the top end of the indoor heat exchanger (3); the lower axial flow fan (22) is located between the downwind port (11) and the bottom end of the indoor heat exchanger (3); and both the upper axial flow fan (21) and the lower axial flow fan (22) are bidirectional rotating fans.

2. The cabinet air conditioner according to claim 1, characterized in that: The height of the whole machine casing (1) is H, the height of the air inlet (12) is h, 0.45H≥h≥0.38H, and the air inlet (12) is located within the plane coverage area of ​​the air inlet heat exchange core of the indoor heat exchanger (3).

3. The cabinet air conditioner according to claim 2, characterized in that: An upper air duct (4) is provided in the top area of ​​the internal accommodating space (10), the upper axial flow fan (21) is located between the upper air duct (4) and the indoor heat exchanger (3), and the upper air port (13) is arranged corresponding to the outer port of the upper air duct (4), and a first vortex breaking structure (41) is provided in the central area of ​​the upper air duct (4), and the first vortex breaking structure (41) extends along the airflow guiding direction of the upper air duct (4).

4. The cabinet air conditioner according to claim 3, characterized in that: The airflow guiding direction of the upper air duct (4) is the height direction, and the cross-sectional area of ​​the first vortex-breaking structure (41) increases from bottom to top.

5. The cabinet air conditioner according to claim 4, characterized in that: The cross section of the first vortex-breaking structure (41) is an ellipse, and the major axis of the ellipse extends front to back and the minor axis extends left to right.

6. The cabinet air conditioner according to claim 3, characterized in that: The central axis section of the upper air duct (4) on the left-right symmetric plane of the whole machine housing (1) is a hyperbola that conforms to the following formula: Among them, 135≤a≤152, 102.5≤b≤104.

7. The cabinet air conditioner according to claim 6, characterized in that: The maximum diameter of the upper air duct (4) is C, the major axis of the ellipse with the maximum cross section of the first vortex-breaking structure is c1, and the minor axis is d1, 0.15C≤c1≤0.18C, 0.1C≤d1≤0.12C; the major axis of the ellipse with the minimum cross section of the first vortex-breaking structure is c2, and the minor axis is d2, 0.06C≤c2≤0.08C, 0.04C≤d2≤0.06C.

8. The cabinet air conditioner according to claim 2, characterized in that: A downwind duct (5) is provided in the bottom area of ​​the internal accommodating space (10), the downwind duct (5) is located between the downwind duct (5) and the indoor heat exchanger (3), and the downwind port (11) is arranged corresponding to the outer port of the downwind duct (5), and a second vortex-breaking structure (51) is provided in the central area of ​​the downwind duct (5), and the second vortex-breaking structure (51) extends along the airflow guiding direction of the downwind duct (5).

9. The cabinet air conditioner according to claim 8, characterized in that: The airflow guiding direction of the lower air duct (5) smoothly changes from vertical up and down to front and back horizontal arc direction, and the cross-sectional area of ​​the second vortex-breaking structure (51) becomes smaller from top to bottom.

10. The cabinet air conditioner according to claim 9, characterized in that: The central axis section of the downwind duct (5) on the left-right symmetrical plane of the whole machine housing (1) is a parabola that conforms to the following formula: y=px 2 , where 0.0028≤p≤0.0031.

11. The cabinet air conditioner according to claim 10, characterized in that: On the central axis section of the downwind duct (5) on the left-right symmetrical plane of the whole machine casing (1), the inner port diameter of the downwind duct (5) is E, and the outer port diameter is F, the cross-section of the second vortex-breaking structure (51) is circular, the radius of the circle of the maximum cross-section of the second vortex-breaking structure (51) is 0.11E≤e≤0.135E, and the radius of the circle of the minimum cross-section of the second vortex-breaking structure (51) is 0.04F≤f≤0.055F.

12. A control method for a cabinet air conditioner according to any one of claims 1 to 11, characterized in that: The steps include: Get air conditioner control instructions; When the control instruction is a simultaneous upper and lower air supply mode, the upper axial flow fan (21) is controlled to operate so that part of the airflow entering the internal accommodating space (10) through the air inlet (12) and the indoor heat exchanger (3) is delivered through the upper air outlet (13), and the lower axial flow fan (22) is controlled to operate so that another part of the airflow entering the internal accommodating space (10) through the air inlet (12) and the indoor heat exchanger (3) is delivered through the lower air outlet (11); or, When the control instruction is the full upper air supply mode, the upper axial flow fan (21) is controlled to operate so that the external air flow enters the internal accommodating space (10) through the lower air port (11) and the air inlet (12) and is delivered through the upper air port (13); or, When the control instruction is a full downward air supply mode, the downward axial flow fan (22) is controlled to operate so that the external air flow enters the internal accommodating space (10) through the upper air port (13) and the air inlet (12) and is discharged through the lower air port (11).

13. The control method according to claim 12, characterized in that: When the control instruction is the full upper air supply mode, the lower axial flow fan (22) is also controlled to operate so that the airflow enters the internal accommodating space (10) through the lower air port (11); or, When the control instruction is the full downward air supply mode, the upper axial flow fan (21) is also controlled to operate so that the airflow enters the internal accommodating space (10) through the upper air port (13).

Images