A ductwork device and a cabinet air conditioner

Abstract

This invention provides an air duct device and a cabinet-type air conditioner, belonging to the technical field of air handling equipment. The air duct device includes an air duct shell, in which a main air duct and a secondary air duct are arranged side by side. The main air duct includes an upper air supply duct, a fan blade cavity, and a lower air supply duct. The fan blade cavity has a fan blade cavity outlet A, a fan blade cavity outlet B, and a fan blade cavity inlet. The lower part of the upper air supply duct is connected to the fan blade cavity outlet A, and the upper part of the lower air supply duct is connected to the fan blade cavity outlet B. The secondary air duct has a secondary air duct upper outlet and a secondary air duct lower outlet. An upper connecting port is formed between the upper air supply duct and the secondary air duct, and a lower connecting port is formed between the lower air supply duct and the secondary air duct. When both the upper and lower connecting ports are closed, neither the upper nor the lower air supply duct is connected to the secondary air duct. Simultaneous airflow from both the upper and lower sides can be achieved. When the upper connecting port is open and both lower connecting ports are closed, downward airflow can be achieved. When the upper connecting port is closed and the lower connecting port is open, upward airflow can be achieved. The air supply volume is large and uniform.

Description

Technical Field

[0001] This invention belongs to the field of air handling equipment technology, and particularly relates to an air duct device and a cabinet air conditioner. Background Technology

[0002] In existing ventilation equipment, when air is supplied through a single centrifugal duct, the centrifugal duct includes an upper supply duct, a fan blade cavity, and a lower supply duct arranged sequentially from top to bottom. The upper supply duct and the fan blade cavity are connected through the upper outlet of the fan blade cavity, and the lower supply duct and the fan blade cavity are connected through the lower outlet of the fan blade cavity. If upward air supply is required, the lower outlet of the fan blade cavity is closed, and the air in the fan blade cavity is discharged through the upper supply duct. If downward air supply is required, the upper outlet of the fan blade cavity is closed, and the air in the fan blade cavity is discharged through the lower supply duct. However, this solution has a small air volume, low air supply efficiency, and large air supply pressure loss. When air is supplied through dual centrifugal ducts, the cooperation of the two centrifugal ducts is required to achieve a large air volume supply upward or downward. However, this solution has a complex structure, occupies a large space, and has uneven air volume. Summary of the Invention

[0003] This invention provides an air duct device and a cabinet air conditioner to at least solve the technical problems of small air volume and low air efficiency when using a single centrifugal air duct in existing ventilation equipment, and the complex structure, large space occupation, and uneven air volume when using a dual centrifugal air duct.

[0004] This invention provides an air duct device for cabinet-type air handling equipment; the air duct device includes an air duct shell, the air duct shell having a main air duct and a secondary air duct arranged side by side;

[0005] The main air duct includes an upper air supply duct, a blade cavity, and a lower air supply duct arranged sequentially from top to bottom. The blade cavity is used to house the blades. The blade cavity has a blade cavity outlet A on its radially upper side, a blade cavity outlet B on its radially lower side, and a blade cavity inlet on its axial side. The lower part of the upper air supply duct is connected to the blade cavity outlet A, and the upper part of the upper air supply duct has an upper air supply outlet. The upper part of the lower air supply duct is connected to the blade cavity outlet B, and the lower part of the lower air supply duct has a lower air supply outlet.

[0006] The upper part of the secondary air duct has an upper outlet, and the lower part has a lower outlet.

[0007] An upper connecting port is formed between the upper air supply duct and the secondary air supply duct, and the upper connecting port can be controlled to open or close; when the upper connecting port is closed, the upper air supply duct and the secondary air supply duct are not connected; when the upper connecting port is open, the lower air supply duct is the main downward air outlet path, and the upper air supply duct and the secondary air supply duct form a downward air outlet secondary flow path between the A outlet of the fan blade cavity and the lower outlet of the secondary air supply duct; and / or,

[0008] A lower connecting port is formed between the lower air supply duct and the secondary air duct, and the lower connecting port can be controlled to open or close. When the lower connecting port is closed, the lower air supply duct and the secondary air duct are not connected. When the lower connecting port is open, the upper air supply duct is the main upper air outlet path, and the lower air supply duct and the secondary air duct form an upper air outlet secondary flow path between the B outlet of the fan blade cavity and the upper outlet of the secondary air duct.

[0009] Further optionally, an upper windbreak mechanism is provided at the upper connecting port, and the upper windbreak mechanism is provided with a first working position and a second working position;

[0010] When the upper windshield mechanism is in the first working position, the upper windshield mechanism closes the upper connecting port;

[0011] When the upper windshield mechanism is in the second working position, the upper windshield mechanism opens the upper connecting port, and the upper windshield mechanism separates the upper air supply duct and the secondary air duct.

[0012] The upper windbreak mechanism divides the upper air supply duct into an upper section and a lower section of the upper air supply duct that are arranged opposite each other, and the upper section and the lower section of the upper air supply duct are not connected; the upper windbreak mechanism divides the secondary air duct into a secondary air duct section A and a secondary air duct section B that are arranged opposite each other, and the secondary air duct section A and the secondary air duct section B are not connected.

[0013] The fan blade cavity outlet A, the lower section of the upper air supply duct, the upper connecting port, the secondary air duct section B, and the lower outlet of the secondary air duct are sequentially connected to form the lower air outlet secondary flow path.

[0014] Further optionally, a lower windbreak mechanism is provided at the lower connecting port, and the lower windbreak mechanism has a third working position and a fourth working position;

[0015] When the lower windshield mechanism is in the third working position, the lower windshield mechanism closes the lower connecting port;

[0016] When the lower windshield mechanism is in the fourth working position, the lower windshield mechanism opens the lower connecting port and separates the lower air supply duct and the auxiliary air duct.

[0017] The lower windbreak mechanism divides the lower air supply duct into an upper section and a lower section of the lower air supply duct that are arranged opposite each other, and the upper section and the lower section of the lower air supply duct are not connected; the lower windbreak mechanism divides the secondary air duct into a secondary air duct section C and a secondary air duct section D that are arranged opposite each other, and the secondary air duct section C and the secondary air duct section D are not connected.

[0018] The fan blade cavity outlet B, the lower connecting port, the upper section of the lower air supply duct, the secondary air duct section C, and the upper outlet of the secondary air duct are sequentially connected to form the upper air outlet secondary flow path.

[0019] Further optionally, the upper windbreak mechanism includes an upper baffle, which is rotatably disposed on the side wall having the upper connecting opening;

[0020] When the upper baffle is in the first working position, the upper baffle is attached to the side wall with the upper connecting opening and closes the upper connecting opening; when the upper baffle is in the second working position, a part of the upper baffle is located in the upper air supply duct and divides the upper air supply duct into the upper section of the upper air supply duct and the lower section of the upper air supply duct, and another part of the upper baffle is located in the secondary air supply duct and divides the secondary air supply duct into the secondary air supply duct A section and the secondary air supply duct B section;

[0021] The lower windbreak mechanism includes a lower baffle plate, which is rotatably mounted on the side wall where the lower connecting opening is formed;

[0022] When the lower baffle is in the third working position, the lower baffle adheres to the side wall where the lower connecting opening is formed and closes the lower connecting opening; when the lower baffle is in the fourth working position, a part of the lower baffle is located in the lower air supply duct and divides the lower air supply duct into the upper section of the lower air supply duct and the lower section of the lower air supply duct, and another part of the lower baffle is located in the secondary air duct and divides the secondary air duct into the secondary air duct section C and the secondary air duct section D.

[0023] Further optionally, the fan blade cavity has an upper volute formed at the outlet A of the fan blade cavity. When the upper baffle is in the second working position, the vertical distance between the upper baffle and the upper volute is h1, and h1 satisfies: h1≥15mm;

[0024] The fan blade cavity has a lower volute formed at the outlet B of the fan blade cavity. When the lower baffle is in the fourth working position, the vertical distance between the lower baffle and the lower volute is h2, and h2 satisfies: h2≥15mm.

[0025] Further optionally, the fan blade cavity is provided at least one, and when the fan blade cavity is provided multiple times, the multiple fan blade cavities are connected vertically in sequence;

[0026] The fan blade cavity has an inlet formed on its axial rear side, and an auxiliary air duct is provided on its axial front side; a single-suction centrifugal fan blade can be installed inside the fan blade cavity; or...

[0027] The fan blade cavity has inlets on both its axial front and axial rear sides, and the auxiliary air ducts are provided on the left and / or right sides of the fan blade cavity; a double-suction centrifugal fan blade can be installed inside the fan blade cavity.

[0028] Further optionally, it also includes a housing, the housing including a front panel and a top panel, the front panel forming a lower air outlet, and the top panel disposed on top of the front panel and forming an upper air outlet;

[0029] The air duct housing is disposed inside the housing, and the upper outlet of the auxiliary air duct and the upper outlet of the supply air duct are connected to the upper air outlet through the upper air outlet duct, and the lower outlet of the auxiliary air duct and the lower outlet of the supply air duct are connected to the lower air outlet through the lower air outlet duct.

[0030] Further optionally, the duct housing includes a volute and a volute cover, which are fastened together to form the main duct and the secondary duct; or, the duct housing includes a main housing, a front cover and a rear cover, the front cover being fastened to the front side of the main housing and the secondary duct being formed between the front cover and the main housing, and the rear cover being fastened to the rear side of the main housing and the main duct being formed between the rear cover and the main housing;

[0031] The air duct device further includes an air outlet frame assembly, which includes an upper air outlet frame and a lower air outlet frame. The upper air outlet frame is disposed above the air duct shell and forms the upper air outlet duct, while the lower air outlet frame is disposed below the air duct shell and forms the lower air outlet duct.

[0032] Further optionally, the top plate also forms an upper air inlet, which is located behind the upper air outlet; the housing also includes a bottom plate, the top plate and the bottom plate are arranged opposite each other, and the bottom plate forms a lower air inlet, which is located behind the lower air outlet;

[0033] An air inlet cavity is formed between the air duct shell, the housing, the upper air inlet, and the lower air inlet, and the air inlet cavity is connected to the upper air inlet, the lower air inlet, and the fan blade cavity inlet;

[0034] A portion of the air in the environment where the housing is located can enter the air intake cavity through the upper air inlet, and another portion of the air in the environment where the housing is located can enter the air intake cavity through the lower air inlet. The air in the air intake cavity enters the fan blade cavity through the fan blade cavity inlet.

[0035] Further optionally, the air duct device is provided with a simultaneous air outlet from the top and bottom, an air outlet from the top, and an air outlet from the bottom;

[0036] When neither the upper air supply duct nor the lower air supply duct is connected to the auxiliary air duct, a portion of the air in the fan blade cavity can be discharged through the upper air supply duct, the upper air outlet duct and the upper air outlet, and another portion of the air in the fan blade cavity can be discharged through the lower air supply duct, the lower air outlet duct and the lower air outlet. The air duct device can operate in the mode of simultaneous upper and lower air discharge.

[0037] When the air duct device forms the upper air outlet main flow path and the upper air outlet secondary flow path, a portion of the air in the fan blade cavity can be discharged through the upper air outlet main flow path and the upper air outlet duct, and another portion of the air in the fan blade cavity can be discharged through the upper air outlet secondary flow path and the upper air outlet duct. The air duct device can operate in the upper air outlet mode.

[0038] When the air duct device forms the lower air outlet main flow path and the lower air outlet secondary flow path, a portion of the air in the fan blade cavity can be discharged through the lower air outlet main flow path and the lower air outlet duct, and another portion of the air in the fan blade cavity can be discharged through the lower air outlet secondary flow path and the lower air outlet duct, and the air duct device can operate in the lower air outlet mode.

[0039] The present invention also provides a cabinet air conditioner, including an indoor unit, the indoor unit including an indoor heat exchanger and the air duct device described in any of the above claims; the indoor heat exchanger is disposed on the air inlet side of the fan blade cavity inlet.

[0040] Compared with the prior art, the main advantages of the present invention are as follows:

[0041] The air duct device can achieve simultaneous air outlet from top and bottom, top air outlet and bottom air outlet. It has a simple structure, multiple air outlets, high air supply efficiency, large air supply volume and uniform air supply volume, expands the air supply range and extends the air supply distance. It solves the problems of small air supply volume and low air supply efficiency when using a single centrifugal air duct in existing ventilation equipment, and complex structure and uneven air supply volume when using a double centrifugal air duct. Attached Figure Description

[0042] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0043] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0044] Figure 1 A schematic diagram of an embodiment of the indoor unit provided by the present invention when the secondary air duct is located in front of the main air duct;

[0045] Figure 2aA schematic diagram of an embodiment of the indoor unit provided by the present invention when operating in the mode of simultaneous air outlet at both top and bottom;

[0046] Figure 2b A schematic diagram of an embodiment of the indoor unit provided by the present invention in terms of its air outlet mode during operation;

[0047] Figure 2c A schematic diagram of an embodiment of the indoor unit provided by the present invention in the air outlet mode during operation;

[0048] Figure 3 A schematic diagram of an embodiment of the indoor unit provided by the present invention when the secondary air duct is located to the left and / or right of the main air duct;

[0049] In the picture:

[0050] 1-Air duct housing; 11-Voltage housing; 121-Main housing; 122-Front cover; 123-Rear cover; 13-Upper air duct; 131-Upper section of upper air duct; 132-Lower section of upper air duct; 14-Lower air duct; 141-Upper section of lower air duct; 142-Lower section of lower air duct; 15-Ice blade cavity; 151-Outlet A of ice blade cavity; 152-Outlet B of ice blade cavity; 153-Inlet of ice blade cavity; 16-Ice blade; 17-Secondary air duct; 171-Upper outlet of secondary air duct; 172-Lower outlet of secondary air duct; 173-Section A of secondary air duct; 174-Section B of secondary air duct; 175-Section C of secondary air duct; 176-Section D of secondary air duct; 181-Upper connecting port; 182-Lower connecting port; 183-Upper baffle; 184-Lower baffle;

[0051] 21-Upper air outlet frame; 211-Upper air outlet duct; 22-Lower air outlet frame; 221-Lower air outlet duct;

[0052] 3-Casing; 31-Front panel; 311-Lower air outlet; 32-Rear panel; 33-Top panel; 331-Upper air outlet; 332-Upper air inlet; 34-Bottom panel; 341-Lower air inlet;

[0053] 4-Indoor heat exchanger. Detailed Implementation

[0054] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0056] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0057] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0058] In existing ventilation equipment, when air is supplied through a single centrifugal duct, if upward air supply is required, the lower outlet of the fan blade cavity is closed, and the air inside the fan blade cavity is discharged through the upper air supply duct; if downward air supply is required, the upper outlet of the fan blade cavity is closed, and the air inside the fan blade cavity is discharged through the lower air supply duct. However, this solution has a small air volume, low air supply efficiency, and large air supply pressure loss. When air is supplied through dual centrifugal ducts, the cooperation of the two centrifugal ducts is required to achieve a large air volume supply upward or downward; however, this solution has a complex structure, occupies a large space, and has uneven air volume.

[0059] The present invention creatively provides an air duct device, including an air duct shell, wherein the air duct shell is formed with a main air duct and a secondary air duct arranged side by side;

[0060] The main air duct includes an upper air supply duct, a blade cavity, and a lower air supply duct. The blade cavity has a blade cavity outlet A, a blade cavity outlet B, and a blade cavity inlet. The lower part of the upper air supply duct is connected to the blade cavity outlet A, and the upper part of the upper air supply duct has an upper air supply outlet. The upper part of the lower air supply duct is connected to the blade cavity outlet B, and the lower part of the lower air supply duct has a lower air supply outlet. The secondary air duct has a secondary air supply outlet and a secondary air supply outlet. An upper connecting port is formed between the upper air supply duct and the secondary air duct, and a lower connecting port is formed between the lower air supply duct and the secondary air duct.

[0061] When both the upper and lower connecting ports are closed, neither the upper nor lower air supply duct is connected to the secondary air duct; a portion of the air inside the fan blade cavity can be discharged through the upper air supply duct, and another portion of the air can be discharged through the lower air supply duct, thereby achieving simultaneous air output from the upper and lower parts.

[0062] When the upper connecting port is opened and the lower connecting ports are closed, part of the air in the fan blade cavity can be discharged through the lower air supply duct, and the other part of the air can be discharged through the lower air outlet auxiliary flow path, thereby achieving lower air outlet;

[0063] When the upper connecting port is closed and the lower connecting port is opened, part of the air in the fan blade cavity can be discharged through the upper air supply duct, and the other part of the air can be discharged through the upper air outlet auxiliary flow path, thereby achieving upper air outlet;

[0064] It has a simple structure, occupies little space, has a large air volume, uniform air volume, and high air delivery efficiency.

[0065] Example 1

[0066] like Figures 1 to 2c As shown, this embodiment provides a duct device for cabinet-type air handling equipment, especially for cabinet-type air conditioners. The height direction of the cabinet-type air handling equipment is vertical. The duct device includes a duct shell 1, and the duct shell 1 forms a main duct and a secondary duct 17 arranged side by side. Specifically, the main duct and the secondary duct 17 are arranged side by side on a horizontal plane, and both the main duct and the secondary duct 17 extend in the vertical direction.

[0067] The main air duct includes an upper air supply duct 13, a fan blade cavity 15, and a lower air supply duct 14 arranged sequentially from top to bottom. A fan blade 16 is installed inside the fan blade cavity 15. The fan blade 16 is connected to a fan blade motor, which drives the fan blade 16 to rotate. Preferably, the fan blade 16 is a centrifugal fan blade. The fan blade cavity 15 has a fan blade cavity outlet A 151 formed on its radially upper side, a fan blade cavity outlet B 152 formed on its radially lower side, and a fan blade cavity inlet 153 formed axially. The fan blade cavity inlet 153 can be formed on one or both sides of the axial direction of the fan blade cavity 15. The fan blade cavity outlet A 151... Both the outlet 152 and the inlet 153 of the fan blade cavity B are connected to the fan blade cavity 15; the lower part of the upper air supply duct 13 is connected to the outlet 151 of the fan blade cavity A, and the upper part of the upper air supply duct 13 forms an upper outlet of the air supply duct; the upper part of the lower air supply duct 14 is connected to the outlet 152 of the fan blade cavity B, and the lower part of the lower air supply duct 14 forms a lower outlet of the air supply duct; at least one fan blade cavity 15 is provided, and when multiple fan blade cavities 15 are provided, the multiple fan blade cavities 15 are connected vertically in sequence, and the layout design can be carried out according to the air duct form to improve the air volume of the whole machine; in this embodiment, there is one fan blade cavity 15.

[0068] The upper part of the secondary air duct 17 has an upper outlet 171 and the lower part has a lower outlet 172.

[0069] An upper connection port 181 is formed between the upper air supply duct 13 and the secondary air duct 17. The upper connection port 181 can be controlled to be opened or closed.

[0070] When the upper connecting port 181 is closed, the upper air supply duct 13 and the secondary air duct 17 are not connected; when the upper connecting port 181 is opened, the upper air supply duct 13 and the secondary air duct 17 form a lower air outlet secondary flow path between the fan blade cavity A outlet 151 and the lower outlet 172 of the secondary air duct; that is, the part of the upper air supply duct 13 between the fan blade cavity A outlet 151 and the upper connecting port 181 is connected to the part of the secondary air duct 17 between the upper connecting port 181 and the lower outlet 172 of the secondary air duct to form a lower air outlet secondary flow path.

[0071] A lower connecting port 182 is formed between the lower air supply duct 14 and the secondary air duct 17. The lower connecting port 182 can be controlled to be opened or closed.

[0072] When the lower connecting port 182 is closed, the lower air supply duct 14 and the secondary air duct 17 are not connected; when the lower connecting port 182 is opened, the lower air supply duct 14 and the secondary air duct 17 form an upper air outlet secondary flow path between the fan blade cavity B outlet 152 and the lower outlet 172 of the secondary air duct; that is, the part of the lower air supply duct 14 between the fan blade cavity B outlet 152 and the lower connecting port 182 is connected to the part of the secondary air duct 17 between the lower connecting port 182 and the lower outlet 172 of the secondary air duct to form an upper air outlet secondary flow path.

[0073] When both the upper connecting port 181 and the lower connecting port 182 are closed, neither the upper air supply duct 13 nor the lower air supply duct 14 is connected to the auxiliary air supply duct 17. Air outside the fan blade cavity 15 can enter the fan blade cavity 15 through the fan blade cavity inlet 153. Part of the air inside the fan blade cavity 15 can be discharged through the fan blade cavity A outlet 151 and the upper air supply duct 13, and another part of the air inside the fan blade cavity 15 can be discharged through the fan blade cavity B outlet 152 and the lower air supply duct 14. Thus, the air duct device can achieve simultaneous air outlet from the top and bottom, multi-channel air outlet, large air supply volume and uniform air supply volume, expand the air supply range and extend the air supply distance.

[0074] When the upper connecting port 181 is closed and the lower connecting port 182 is open, the upper air supply duct 13 is not connected to the secondary air supply duct 17. The upper air supply duct 13 is the main upper air outlet path. The lower air supply duct 14 and the secondary air supply duct 17 form an upper air outlet secondary flow path between the B outlet 152 of the fan blade cavity and the upper outlet 171 of the secondary air supply duct. Air outside the fan blade cavity 15 can enter the fan blade cavity 15 through the fan blade cavity inlet 153. A part of the air inside the fan blade cavity 15 can be discharged through the main upper air outlet path, and another part of the air inside the fan blade cavity 15 can be discharged through the upper air outlet secondary flow path. Thus, the air duct device can achieve upper air outlet. With the help of the secondary air supply duct 17, multi-channel air outlet can be achieved, with large and uniform air supply volume, expanding the air supply range and extending the air supply distance.

[0075] When the upper connecting port 181 is opened and the lower connecting port 182 is closed, the lower air supply duct 14 and the secondary air supply duct 17 are not connected. The lower air supply duct 14 is the main downward air outlet path. The upper air supply duct 13 and the secondary air supply duct 17 form a lower downward air outlet secondary flow path between the A outlet 151 of the fan blade cavity and the lower outlet 172 of the secondary air supply duct. Air outside the fan blade cavity 15 can enter the fan blade cavity 15 through the fan blade cavity inlet 153. A part of the air inside the fan blade cavity 15 can be discharged through the main downward air outlet path, and another part of the air inside the fan blade cavity 15 can be discharged through the lower downward air outlet secondary flow path. Thus, the air duct device can realize downward air outlet. With the help of the secondary air supply duct 17, multi-channel air outlet can be realized, with large and uniform air supply volume, expanding the air supply range and extending the air supply distance.

[0076] In summary, by controlling the upper connecting port 181 and the lower connecting port 182 to be in corresponding states, the upper air supply duct 13, the lower air supply duct 14 and the auxiliary air duct 17 can be connected or disconnected, thus achieving air outlet in different directions. The structure is simple, the air supply efficiency is high and the air outlet is uniform, solving the problems of small air volume and low air outlet efficiency when using a single centrifugal air duct in existing ventilation equipment, and the complex structure and uneven air volume when using a double centrifugal air duct.

[0077] Example 2

[0078] Based on Embodiment 1, the upper connecting port 181 and the lower connecting port 182 are arranged vertically opposite to each other.

[0079] An upper windbreak mechanism is provided at the upper connection port 181, and the upper windbreak mechanism has a first working position and a second working position;

[0080] When the upper windshield mechanism is in the first working position, the upper windshield mechanism closes the upper connecting port 181, and the upper air supply duct 13 and the secondary air duct 17 are not connected;

[0081] When the upper windshield mechanism is in the second working position, the upper windshield mechanism opens the upper connecting port 181, and the upper windshield mechanism separates the upper air supply duct 13 and the secondary air duct 17.

[0082] The upper windbreak mechanism divides the upper air supply duct 13 into an upper section 131 and a lower section 132 that are arranged opposite each other, and the upper section 131 and the lower section 132 are not connected; the upper windbreak mechanism divides the secondary air duct 17 into a secondary air duct A section 173 and a secondary air duct B section 174 that are arranged opposite each other, and the secondary air duct A section 173 and the secondary air duct B section 174 are not connected;

[0083] The fan blade cavity A outlet 151, the lower section of the upper air supply duct 132, the upper connecting port 181, the auxiliary air duct section B 174, and the lower outlet of the auxiliary air duct 172 are connected in sequence to form the lower air outlet auxiliary flow path; both the lower air outlet main flow path and the lower air outlet auxiliary flow path can discharge air, realizing a large volume of air downward.

[0084] Preferably, the upper windbreak mechanism includes an upper baffle 183, which is rotatably disposed on the side wall having the upper connecting opening 181; the pivot of the upper baffle 183 is located between the upper edge and the lower edge of the upper connecting opening 181.

[0085] When the upper baffle 183 is in the first working position, the upper baffle 183 is attached to the side wall with the upper connecting port 181 and closes the upper connecting port 181; when the upper baffle 183 is in the second working position, a part of the upper baffle 183 is located in the upper air supply duct 13 and divides the upper air supply duct 13 into an upper section 131 and a lower section 132 of the upper air supply duct. The upper part of the upper section 131 of the upper air supply duct forms an upper outlet of the air supply duct, and the lower part of the lower section 132 of the upper air supply duct is connected to the outlet 151 of the fan blade cavity A; another part of the upper baffle 183 is located in the secondary air supply duct 17 and divides the secondary air supply duct 17 into a secondary air supply duct section A 173 and a secondary air supply duct section B 174. The upper part of the secondary air supply duct section A 173 forms an upper outlet 171 of the secondary air supply duct, and the lower part of the secondary air supply duct section B 174 forms a lower outlet 172 of the secondary air supply duct.

[0086] An upper volute is formed at the outlet 151 of the fan blade cavity 15. When the upper baffle 183 is in the second working position, the vertical distance between the upper baffle 183 and the upper volute is h1, which satisfies: h1≥15mm. This effectively avoids airflow loss caused by the structural abrupt change between the upper air duct 13 and the fan blade cavity 15, increases the air volume of the fan system, and eliminates abnormal noise caused by airflow impacting the solid wall.

[0087] Furthermore, a lower windbreak mechanism is provided at the lower connection port 182, and the lower windbreak mechanism has a third working position and a fourth working position;

[0088] When the lower windshield mechanism is in the third working position, the lower windshield mechanism closes the lower connecting port 182, and the lower air supply duct 14 and the auxiliary air duct 17 are not connected;

[0089] When the lower windshield mechanism is in the fourth working position, the lower windshield mechanism opens the lower connecting port 182 and separates the lower air supply duct 14 and the auxiliary air duct 17.

[0090] The lower baffle mechanism divides the lower air supply duct 14 into an upper section 141 and a lower section 142 that are arranged opposite each other, and the upper section 141 and the lower section 142 are not connected; the lower baffle mechanism divides the secondary air duct 17 into a secondary air duct section C 175 and a secondary air duct section D 176 that are arranged opposite each other, and the secondary air duct section C 175 and the secondary air duct section D 176 are not connected; the upper part of the secondary air duct section C 175 forms the upper outlet 171 of the secondary air duct, and the lower part of the secondary air duct section D 176 forms the lower outlet 172 of the secondary air duct;

[0091] The fan blade cavity outlet B 152, the lower connecting port 182, the upper section of the lower air supply duct 141, the secondary air duct section C 175 and the upper outlet of the secondary air duct 171 are connected in sequence to form the upper air outlet secondary flow path; both the upper air outlet main flow path and the upper air outlet secondary flow path can discharge air, realizing a large volume of air downward.

[0092] Preferably, the lower windbreak mechanism includes a lower baffle 184, which is rotatably disposed on the side wall having the lower connecting opening 182; the pivot of the lower baffle 184 is located between the upper edge and the lower edge of the lower connecting opening 182.

[0093] When the lower baffle 184 is in the third working position, the lower baffle 184 is attached to the side wall with the lower connecting port 182 and closes the lower connecting port 182; when the lower baffle 184 is in the fourth working position, a part of the lower baffle 184 is located in the lower air supply duct 14 and divides the lower air supply duct 14 into the upper section 141 and the lower section 142 of the lower air supply duct. The upper part of the upper section 141 of the lower air supply duct is connected to the outlet 152 of the fan blade cavity B, and the lower part of the lower section 142 of the lower air supply duct forms the lower outlet of the air supply duct; another part of the lower baffle 184 is located in the secondary air supply duct 17 and divides the secondary air supply duct 17 into the secondary air supply duct section C 175 and the secondary air supply duct section D 176. The upper part of the secondary air supply duct section C 175 forms the upper outlet 171 of the secondary air supply duct, and the lower part of the secondary air supply duct section D 176 forms the lower outlet 172 of the secondary air supply duct.

[0094] A lower volute is formed at the outlet 152 of the fan blade cavity 15. When the lower baffle 184 is in the fourth working position, the vertical distance between the lower baffle 184 and the lower volute is h2, which satisfies: h2≥15mm. This effectively avoids airflow loss caused by the structural abrupt change between the lower air duct 14 and the fan blade cavity 15, increases the air volume of the fan system, and eliminates abnormal noise caused by airflow impacting the solid wall.

[0095] In this embodiment, a fan blade cavity inlet 153 is formed on the axial rear side of the fan blade cavity 15, and a secondary air duct 17 is provided on the axial front side of the fan blade cavity 15; a single-suction centrifugal fan blade can be installed inside the fan blade cavity 15; to prevent the secondary air duct 17 from affecting the air intake, the size of the secondary air duct 17 can be adjusted according to the reserved space of the whole machine.

[0096] In addition, the air duct device also includes a housing 3, which includes a front panel 31, a rear panel 32, a left side panel, a right side panel, a top panel 33, and a bottom panel 34. The front panel 31 and the rear panel 32 are arranged opposite each other, and the front panel 31 forms a lower air outlet 311. The left side panel and the right side panel are arranged opposite each other. The left side panel, the rear panel 32, the right side panel, and the front panel 31 are connected in sequence in the horizontal direction to form the main body of the housing 3. The top panel 33 is located on the top of the main body of the housing 3 and is connected to the main body of the housing 3. The bottom panel 34 is located on the bottom of the main body of the housing 3 and is connected to the main body of the housing 3. The top panel 33 forms an upper air outlet 331 and an upper air inlet 332, with the upper air inlet 332 located behind the upper air outlet 331. The bottom panel 34 forms a lower air inlet 341, with the lower air inlet 341 located behind the lower air outlet 311. The housing 3 also includes a chassis, and the main body of the housing 3 is mounted on the chassis.

[0097] The upper air inlet 332, upper air outlet 331, lower air inlet and lower air outlet 311 are all concealed;

[0098] The air duct housing 1 is located inside the housing 3, and both the upper outlet 171 of the auxiliary air duct and the upper outlet of the supply air duct are connected to the upper air outlet 331, while both the lower outlet 172 of the auxiliary air duct and the lower outlet of the supply air duct are connected to the lower air outlet 311. Specifically, the upper outlet 171 of the auxiliary air duct and the upper outlet of the supply air duct are connected to the upper air outlet 331 through the upper air outlet 211, and the lower outlet 172 of the auxiliary air duct and the lower outlet of the supply air duct are connected to the lower air outlet 311 through the lower air outlet 221. The upper supply air duct 13 has an upper connecting port 181 at one end near the fan blade cavity 15, and the lower supply air... A lower connecting port 182 is formed at the end of the duct 14 near the fan blade cavity 15. The upper connecting port 181 and the lower connecting port 182 are located on the same side of the duct shell 1. The "gradient optimization method" is adopted to design the connection part between the main air duct and the secondary air duct 17. By converging the airflow of the main air duct and the secondary air duct 17, the air volume is effectively increased, thereby improving the overall efficiency of the unit. The noise quality of the air conditioner operation is improved, the air volume of the centrifugal fan is increased, and the air volume loss caused by the current distributed air supply mechanism to achieve unidirectional air supply is solved, as well as the abnormal sound quality problem caused by the airflow impacting the solid wall surface.

[0099] An air inlet cavity is formed between the air duct housing 1, the housing 3, the upper air inlet 332 and the lower air inlet 341, and the air inlet cavity is connected to the upper air inlet 332, the lower air inlet 341 and the fan blade cavity inlet 153;

[0100] A portion of the air in the environment where the housing 3 is located can enter the air intake cavity through the upper air inlet 332, and another portion of the air in the environment where the housing 3 is located can enter the air intake cavity through the lower air inlet 341. The air in the air intake cavity enters the fan blade cavity 15 through the fan blade cavity inlet 153.

[0101] Furthermore, depending on actual needs, the secondary air duct 17 can be located to the left and / or right of the main air duct, or the secondary air duct 17 can be located in front of the main air duct; the air duct housing 1 includes a volute housing 11 and a volute cover; when the secondary air duct 17 is located to the left and / or right of the main air duct, the volute housing 11 and the volute cover are fastened together to form the main air duct and the secondary air duct 17; this improves the installation efficiency of the air duct device and avoids abnormal assembly noise; the main air duct and the secondary air duct 17 are separated by a partition, on which an upper connecting port 181 and a lower connecting port 182 are formed, an upper windbreak mechanism is provided at the upper connecting port 181, and a lower windbreak mechanism is provided at the lower connecting port 182;

[0102] When the secondary air duct 17 is located in front of the main air duct, the air duct shell 1 includes a main shell 121, a front cover 122 and a rear cover 123. The front cover 122 is fastened to the front of the main shell 121 and a secondary air duct 17 is formed between the front cover 122 and the main shell 121. The rear cover 123 is fastened to the rear of the main shell 121 and a main air duct is formed between the rear cover 123 and the main shell 121. An upper connecting port 181 and a lower connecting port 182 are formed on the side wall of the main shell 121 near the front cover 122. An upper windbreak mechanism is provided at the upper connecting port 181 and a lower windbreak mechanism is provided at the lower connecting port 182.

[0103] The air duct device also includes an air outlet frame assembly, which includes an upper air outlet frame 21 and a lower air outlet frame 22. The upper air outlet frame 21 is located above the air duct shell 1 and forms an upper air outlet duct 211, while the lower air outlet frame 22 is located below the air duct shell 1 and forms a lower air outlet duct 221.

[0104] The air duct system is equipped with simultaneous top and bottom air outlet, top air outlet, and bottom air outlet modes;

[0105] When both the upper connecting port 181 and the lower connecting port 182 are closed, neither the upper air supply duct 13 nor the lower air supply duct 14 is connected to the auxiliary air duct 17. A portion of the air in the fan blade cavity 15 can be discharged through the upper air supply duct 13, the upper air outlet duct 211 and the upper air outlet 331, and another portion of the air in the fan blade cavity 15 can be discharged through the lower air supply duct 14, the lower air outlet duct 221 and the lower air outlet 311. The air duct device can operate in a mode of simultaneous upper and lower air outlets.

[0106] When the upper connecting port 181 is closed and the lower connecting port 182 is open, the upper air supply duct 13 is not connected to the secondary air duct 17. The upper air supply duct 13 is the main upper air outlet path. The lower air supply duct 14 and the secondary air duct 17 form an upper air outlet secondary flow path between the fan blade cavity B outlet 152 and the upper outlet 171 of the secondary air duct. A portion of the air in the fan blade cavity 15 can be discharged through the main upper air outlet path and the upper air outlet duct 211, and another portion of the air in the fan blade cavity 15 can be discharged through the upper air outlet secondary flow path and the upper air outlet duct 211. The air duct device can operate in the upper air outlet mode, which increases the air volume and maintains the consistency of the air outlet.

[0107] When the upper connecting port 181 is opened and the lower connecting port 182 is closed, the lower air supply duct 14 and the secondary air duct 17 are not connected. The lower air supply duct 14 is the main lower air outlet path. The upper air supply duct 13 and the secondary air duct 17 form a lower air outlet secondary flow path between the A outlet 151 of the fan blade cavity and the lower outlet 172 of the secondary air duct. A portion of the air in the fan blade cavity 15 can be discharged through the main lower air outlet path and the lower air outlet duct 221, and another portion of the air in the fan blade cavity 15 can be discharged through the lower air outlet secondary flow path and the lower air outlet duct 221. The air duct device can operate in the lower air outlet mode, which increases the air volume and maintains the consistency of the air outlet.

[0108] Furthermore, an air guide mechanism is provided at the upper air outlet 331. The air guide mechanism includes multiple rotatable air guide plates, which are arranged sequentially and spaced apart along the front-rear direction of the housing 3. The length direction of each air guide plate is consistent with the left-right direction of the housing 3. The multiple air guide plates can open or close the upper air outlet 331 or adjust the air outlet direction of the upper air outlet 331. When the multiple air guide plates close the upper air outlet 331, dust can be prevented from entering the interior of the housing 3 through the upper air outlet 331, improving the aesthetics. By controlling the rotation of the multiple air guide plates, the air outlet direction of the upper air outlet 331 can be adjusted to achieve air delivery at different angles and meet different air delivery needs.

[0109] An upper air inlet 332 is provided with an upper air inlet grille, and there are multiple upper air inlet grilles; the multiple upper air inlet grilles are arranged sequentially at intervals along the front and rear direction of the housing 3, and the multiple upper air inlet grilles can open or close the upper air inlet 332, or adjust the air intake direction of the upper air inlet 332.

[0110] A lower air inlet grille is provided at the lower air inlet 341, and there are multiple lower air inlet grilles; the multiple lower air inlet grilles are arranged sequentially at intervals along the front and rear direction of the housing 3, and the multiple lower air inlet grilles can open or close the lower air inlet 341, or adjust the air intake direction of the lower air inlet 341.

[0111] A lower air outlet 311 is provided with a lower air outlet grille, and there are multiple lower air outlet grilles; the multiple lower air outlet grilles are arranged sequentially at intervals along the vertical direction of the housing 3, and the air outlet direction of the lower air outlet 311 can be adjusted by the multiple lower air outlet grilles.

[0112] In summary, when the upper windshield mechanism is in the first working position and the lower windshield mechanism is in the third working position, neither the upper air supply duct 13 nor the lower air supply duct 14 is connected to the auxiliary air supply duct 17. At this time, the air duct device can operate in a simultaneous upper and lower air supply mode. When the upper windshield mechanism is in the first working position and the lower windshield mechanism is in the fourth working position, the upper air supply duct 13 is not connected to the auxiliary air supply duct 17, and the upper air supply duct 13 is the main upper air supply path. The lower air supply duct 14 is connected to the auxiliary air supply duct 17, and the lower air supply duct 14 and the auxiliary air supply duct 17 are at the outlet 152 of the fan blade cavity B. An upward airflow path is formed between the upper outlet 171 of the auxiliary air duct and the upper outlet of the auxiliary air duct; at this time, the air duct device can operate in the upward airflow mode; when the upper windbreak mechanism is in the second working position and the lower windbreak mechanism is in the third working position, the lower air supply duct 14 is not connected to the auxiliary air duct 17, the lower air supply duct 14 is the main downward airflow path, the upper air supply duct 13 is connected to the auxiliary air duct 17, and the upper air supply duct 13 and the auxiliary air duct 17 form a downward airflow path between the A outlet 151 of the fan blade cavity and the lower outlet 172 of the auxiliary air duct; at this time, the air duct device can operate in the downward airflow mode;

[0113] It can achieve multiple air outlet modes, with large air volume, high air outlet efficiency and uniform air outlet.

[0114] Example 3

[0115] like Figure 3 As shown, unlike embodiment 2, in this embodiment, the fan blade cavity 15 has a fan blade cavity inlet 153 on both the axial front side and the axial rear side, and a secondary air duct 17 is provided on the left and / or right side of the fan blade cavity 15; to avoid the secondary air duct 17 obstructing the air intake and affecting the air intake volume, and also to avoid abnormal sound quality problems caused by uneven air intake on both sides.

[0116] A double-suction centrifugal fan blade can be installed inside the fan blade cavity 15; when the fan blade 16 rotates, all air can enter the fan blade cavity 15 through the fan blade cavity inlet 153; this improves the air intake efficiency of the fan blade cavity 15 and increases the air supply volume, resulting in good heating and cooling effects when applied to cabinet air conditioners.

[0117] Each fan blade cavity 15 is provided with multiple fan blades 16 arranged side by side; preferably, each fan blade cavity 15 is provided with two fan blades 16 arranged side by side.

[0118] Example 4

[0119] like Figures 1 to 3 As shown, this embodiment provides a cabinet air conditioner, including an indoor unit. The indoor unit includes an indoor heat exchanger 4 and an air duct device. The air duct device is the air duct device described in any one of Embodiments 1 to 3. The indoor heat exchanger 4 is disposed on the air inlet side of the fan blade cavity inlet 153. Specifically, the indoor heat exchanger 4 is disposed between the fan blade cavity inlet 153 on the axial rear side of the fan blade cavity 15 and the rear panel.

[0120] When the fan blade 16 rotates, a portion of the indoor air enters the air inlet cavity through the upper air inlet 332, and another portion of the indoor air enters the air inlet cavity through the lower air inlet 341. When the air in the air inlet cavity flows through the indoor heat exchanger 4, it completes heat exchange with the indoor heat exchanger 4, and then enters the fan blade cavity 15 through the fan blade cavity inlet 153.

[0121] When the cabinet air conditioner is in air supply mode, the upper deflector mechanism can be in the first working position and the lower deflector mechanism can be in the third working position, and the indoor unit can operate in a mode of simultaneous upper and lower air supply. Indoor air is simultaneously introduced through the upper air inlet 332 and the lower air inlet 341 and enters the air inlet cavity. The air in the air inlet cavity enters the fan blade cavity 15 through the fan blade cavity inlet 153. A portion of the air in the fan blade cavity 15 can be discharged through the upper air supply duct 13, the upper air outlet duct 211 and the upper air outlet 331, and another portion of the air in the fan blade cavity 15 can be discharged through the lower air supply duct 14, the lower air outlet duct 221 and the lower air outlet 311.

[0122] When the cabinet air conditioner is in cooling mode, the upper baffle mechanism can be in the first working position and the lower baffle mechanism in the fourth working position, and the indoor unit can operate in the upper air outlet mode. Indoor air is simultaneously drawn in through the upper air inlet 332 and the lower air inlet 341 and enters the air inlet cavity. The air in the air inlet cavity enters the fan blade cavity 15 through the fan blade cavity inlet 153. A portion of the air in the fan blade cavity 15 is discharged through the upper air outlet main path and the upper air outlet duct 211, and another portion of the air in the fan blade cavity 15 is discharged through the upper air outlet secondary path and the upper air outlet duct 211. The air discharged from the fan blade cavity outlet 152 is effectively utilized, so that the air in the upper air outlet main path and the upper air outlet secondary path merges in the upper air outlet duct 211, thereby increasing the cooling upper air outlet volume.

[0123] When the cabinet air conditioner is in heating mode, the upper baffle mechanism can be in the second working position and the lower baffle mechanism in the third working position, and the indoor unit can operate in the downward air outlet mode. Indoor air is simultaneously drawn in through the upper air inlet 332 and the lower air inlet 341 and enters the air inlet cavity. The air in the air inlet cavity enters the fan blade cavity 15 through the fan blade cavity inlet 153. A portion of the air in the fan blade cavity 15 is discharged through the lower main air outlet path and the lower air outlet duct 221, and another portion of the air in the fan blade cavity 15 is discharged through the lower secondary air outlet path and the lower air outlet duct 221. The air discharged from the fan blade cavity A outlet 151 is effectively utilized, so that the air in the lower main air outlet path and the lower secondary air outlet path merges in the lower air outlet duct 221, thereby increasing the downward air outlet volume during heating.

[0124] By designing the main air duct and the secondary air duct 17, the design takes into account the air volume, diversified air supply, cooling and heating comfort, and appearance. The structure is simple, the overall size is small, the space occupied is small, and the overall aesthetics are good. It has a large air volume, uniform air supply, and obvious cooling and heating effects. It reduces the temperature difference of indoor air in the vertical direction, making the indoor air comfortable and solving the problems of small air volume, uneven air supply, and poor cooling and heating effects in existing cabinet air conditioners with top or bottom air outlets.

[0125] In summary, ① a technical upgrade is made to the single centrifugal fan distributed air supply device, utilizing the "bypass diversion" principle and "overflow compensation" technology to fully utilize the overall layout space, while also considering the aesthetic upgrade and optimization as well as the different comfort requirements for heating and cooling air supply. A secondary air duct 17 is designed next to the main air duct, and the main air duct and secondary air duct 17 are connected through an upper connecting port 181 and a lower connecting port 182, achieving "all air outlets at the top for cooling and all air outlets at the bottom for heating" for the single centrifugal fan platform; the upper air inlet 332 is designed on the rear side of the top plate 33, the upper air outlet 331 is designed on the front side of the top plate 33, and the lower air inlet 341 is designed on the... The lower air outlet 311 is designed at the lower end of the front panel 31 on the rear side of the base plate 34, realizing a hidden air inlet and outlet. By supplying air to multiple air ducts with a single fan, and by independently designing the upper air inlet 332, lower air inlet 341, upper air outlet 331 and lower air outlet 311 but controlling them differently, it can achieve all-dimensional air supply regulation such as simultaneous air intake and exhaust at the top and bottom, simultaneous air intake at the top and exhaust at the top, and simultaneous air intake at the bottom and exhaust at the bottom. This breaks through the technical bottlenecks of "large vertical temperature difference" and "low air volume" of single-suction single centrifugal fan distributed air supply air conditioners, and improves the market competitiveness of this fan air conditioner with low cost and high technology.

[0126] ② In existing technologies, a mechanical method is used to design a moving mechanism near the fan blade cavity 15 in the air supply duct to force the airflow to change direction. Due to the abrupt structural change, airflow loss occurs, resulting in air volume loss, and the airflow impacting the solid wall generates abnormal noise. Considering the overall layout space, a connecting port is designed on the same side of the diffuser section of the upper air supply duct 13 and the lower air supply duct 14 to connect the main air duct and the secondary air duct 17. The "gradient optimization method" is used to design the connection position between the main air duct and the secondary air duct 17, effectively utilizing all the airflow generated by the fan blade 16, reducing airflow impact, and effectively increasing the air supply volume through the convergence of airflow in the main air duct and the secondary air duct 17, thereby improving the overall efficiency of the machine. Efficiency; achieving full cooling at the top and full heating at the bottom, reducing energy loss; specifically: when full top air outlet is required, the lower connecting port 182 is opened, and the air in the fan blade cavity 15 can be discharged through the upper main air outlet path and the upper secondary air outlet path; when full bottom air outlet is required, the upper connecting port 181 is opened, and the air in the fan blade cavity 15 can be discharged through the lower main air outlet path and the lower secondary air outlet path; effectively utilizing the air in the fan blade cavity 15, increasing the air volume in one direction; effectively reducing airflow loss caused by the mechanical structure in the air supply duct and fan blade cavity 15, eliminating abnormal noise caused by airflow impacting the solid wall surface in traditional methods, and solving the problem of large vertical temperature difference in distributed air supply air conditioning.

[0127] It should be noted that the names A and B outlets of the fan blade cavity are used to distinguish the outlets at different locations within the fan blade cavity, and are not intended to limit the structure and function of the fan blade cavity outlets; similarly, the names A, B, C, and D sections of the secondary air duct are used to distinguish the air duct sections at different locations within the secondary air duct, and are not intended to limit the structure and function of the air duct sections.

[0128] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A ductwork device for use in cabinet-type air handling equipment; characterized in that, The air duct device includes an air duct shell (1), which has a main air duct and a secondary air duct (17) arranged side by side. The main air duct includes an upper air supply duct (13), a blade cavity (15), and a lower air supply duct (14) arranged sequentially from top to bottom. The blade cavity (15) is used to house the blades (16). The blade cavity (15) has a blade cavity A outlet (151) formed on its radially upper side, a blade cavity B outlet (152) formed on its radially lower side, and a blade cavity inlet (153) formed on its axial direction. The lower part of the upper air supply duct (13) is connected to the blade cavity A outlet (151), and the upper part of the upper air supply duct (13) has an upper air supply outlet. The upper part of the lower air supply duct (14) is connected to the blade cavity B outlet (152), and the lower part of the lower air supply duct (14) has a lower air supply outlet. The upper part of the secondary air duct (17) has an upper outlet (171) and the lower part has a lower outlet (172); An upper connecting port (181) is formed between the upper air supply duct (13) and the secondary air supply duct (17), and the upper connecting port (181) can be controlled to open or close; when the upper connecting port (181) is closed, the upper air supply duct (13) and the secondary air supply duct (17) are not connected; when the upper connecting port (181) is open, the lower air supply duct (14) is the main downward air outlet path, and the upper air supply duct (13) and the secondary air supply duct (17) form a lower downward air outlet secondary flow path between the A outlet (151) of the fan blade cavity and the lower outlet (172) of the secondary air supply duct; and / or, A lower connecting port (182) is formed between the lower air supply duct (14) and the secondary air supply duct (17), and the lower connecting port (182) can be controlled to open or close. When the lower connecting port (182) is closed, the lower air supply duct (14) and the secondary air supply duct (17) are not connected. When the lower connecting port (182) is open, the upper air supply duct (13) is the main upper air outlet path, and the lower air supply duct (14) and the secondary air supply duct (17) form an upper air outlet secondary flow path between the B outlet (152) of the fan blade cavity and the upper outlet (171) of the secondary air supply duct.

2. The air duct device according to claim 1, characterized in that, An upper windbreak mechanism is provided at the upper connecting port (181), and the upper windbreak mechanism is provided with a first working position and a second working position; When the upper windshield mechanism is in the first working position, the upper windshield mechanism closes the upper connecting port (181); When the upper windshield mechanism is in the second working position, the upper windshield mechanism opens the upper connecting port (181), and the upper windshield mechanism can separate the upper air supply duct (13) and the secondary air duct (17); The upper windbreak mechanism divides the upper air supply duct (13) into an upper section (131) and a lower section (132) of the upper air supply duct, which are arranged opposite to each other, and the upper section (131) and the lower section (132) of the upper air supply duct are not connected; the upper windbreak mechanism divides the secondary air duct (17) into a secondary air duct A section (173) and a secondary air duct B section (174), which are arranged opposite to each other, and the secondary air duct A section (173) and the secondary air duct B section (174) are not connected; The fan blade cavity A outlet (151), the lower section of the upper air supply duct (132), the upper connecting port (181), the secondary air duct section B (174), and the lower outlet of the secondary air duct (172) are sequentially connected to form the lower air outlet secondary flow path.

3. The air duct device according to claim 2, characterized in that, A lower windbreak mechanism is provided at the lower connecting port (182), and the lower windbreak mechanism has a third working position and a fourth working position; When the lower windshield mechanism is in the third working position, the lower windshield mechanism closes the lower connecting port (182); When the lower windshield mechanism is in the fourth working position, the lower windshield mechanism opens the lower connecting port (182), and the lower windshield mechanism can separate the lower air supply duct (14) and the secondary air duct (17); The lower windbreak mechanism divides the lower air supply duct (14) into an upper section (141) and a lower section (142) of the lower air supply duct, which are arranged opposite each other, and the upper section (141) and the lower section (142) of the lower air supply duct are not connected; the lower windbreak mechanism divides the secondary air duct (17) into a secondary air duct section C (175) and a secondary air duct section D (176), which are arranged opposite each other, and the secondary air duct section C (175) and the secondary air duct section D (176) are not connected; The fan blade cavity outlet B (152), lower connecting port (182), upper section of lower air supply duct (141), secondary air duct section C (175), and upper outlet of secondary air duct (171) are sequentially connected to form the upper air outlet secondary flow path.

4. The air duct device according to claim 3, characterized in that, The upper windbreak mechanism includes an upper baffle (183), which is rotatably disposed on the side wall on which the upper connecting port (181) is formed; When the upper baffle (183) is in the first working position, the upper baffle (183) is attached to the side wall where the upper connecting port (181) is formed and closes the upper connecting port (181); when the upper baffle (183) is in the second working position, a part of the upper baffle (183) is located in the upper air supply duct (13) and divides the upper air supply duct (13) into the upper section (131) and the lower section (132) of the upper air supply duct, and another part of the upper baffle (183) is located in the secondary air supply duct (17) and divides the secondary air supply duct (17) into the secondary air supply duct A section (173) and the secondary air supply duct B section (174); The lower windbreak mechanism includes a lower baffle (184), which is rotatably disposed on the side wall on which the lower connecting port (182) is formed; When the lower baffle (184) is in the third working position, the lower baffle (184) is attached to the side wall where the lower connecting port (182) is formed and closes the lower connecting port (182); when the lower baffle (184) is in the fourth working position, a part of the lower baffle (184) is located in the lower air supply duct (14) and divides the lower air supply duct (14) into the upper section (141) and the lower section (142) of the lower air supply duct, and the other part of the lower baffle (184) is located in the secondary air duct (17) and divides the secondary air duct (17) into the secondary air duct C section (175) and the secondary air duct D section (176).

5. The air duct device according to claim 4, characterized in that, The fan blade cavity (15) has an upper volute formed at the fan blade cavity A outlet (151). When the upper baffle (183) is in the second working position, the vertical distance between the upper baffle (183) and the upper volute is h1, and h1 satisfies: h1≥15mm; The fan blade cavity (15) has a lower worm throat formed at the fan blade cavity outlet (152). When the lower baffle (184) is in the fourth working position, the vertical distance between the lower baffle (184) and the lower worm throat is h2, and h2 satisfies: h2≥15mm.

6. The air duct device according to claim 1, characterized in that, The fan blade cavity (15) is provided at least one; when the fan blade cavity (15) is provided multiple times, the multiple fan blade cavities (15) are connected vertically in sequence. The fan blade cavity (15) has an inlet (153) formed on its axial rear side, and the auxiliary air duct (17) is provided on its axial front side; a fan blade (16) may be provided inside the fan blade cavity (15), and the fan blade (16) is a single-suction centrifugal fan blade; or, The fan blade cavity (15) has a fan blade cavity inlet (153) on both the axial front side and the axial rear side, and the fan blade cavity (15) has an auxiliary air duct (17) on the left and / or right side; a fan blade (16) can be installed in the fan blade cavity (15), and the fan blade (16) is a double-suction centrifugal fan blade.

7. The air duct device according to claim 1, characterized in that, The air duct device also includes a housing (3), which includes a front panel (31) and a top panel (33). The front panel (31) forms a lower air outlet (311), and the top panel (33) is disposed on the top of the front panel (31) and forms an upper air outlet (331). The air duct housing (1) is disposed inside the housing (3), and the upper outlet (171) of the auxiliary air duct and the upper outlet of the supply air duct are both connected to the upper air outlet (331) through the upper air outlet duct (211), and the lower outlet (172) of the auxiliary air duct and the lower outlet of the supply air duct are both connected to the lower air outlet (311) through the lower air outlet duct (221).

8. The air duct device according to claim 7, characterized in that, The air duct shell (1) includes a volute (11) and a volute cover, which are fastened together to form the main air duct and the secondary air duct (17); or, the air duct shell (1) includes a main shell (121), a front cover (122) and a rear cover (123), whereby the front cover (122) is fastened to the front side of the main shell (121) and the secondary air duct (17) is formed between the front cover (122) and the main shell (121), and the rear cover (123) is fastened to the rear side of the main shell (121) and the main air duct is formed between the rear cover (123) and the main shell (121); The air duct device further includes an air outlet frame assembly, which includes an upper air outlet frame (21) and a lower air outlet frame (22). The upper air outlet frame (21) is disposed above the air duct shell (1) and forms the upper air outlet duct (211). The lower air outlet frame (22) is disposed below the air duct shell (1) and forms the lower air outlet duct (221).

9. The air duct device according to claim 7, characterized in that, The top plate (33) also forms an upper air inlet (332), which is located behind the upper air outlet (331); the housing (3) also includes a bottom plate (34), the top plate (33) and the bottom plate (34) are arranged opposite each other, and the bottom plate (34) forms a lower air inlet (341), which is located behind the lower air outlet (311); An air inlet cavity is formed between the air duct shell (1), the housing (3), the upper air inlet (332) and the lower air inlet (341), and the air inlet cavity connects the upper air inlet (332), the lower air inlet (341) and the fan blade cavity inlet (153); A portion of the air in the environment where the housing (3) is located can enter the air inlet cavity through the upper air inlet (332), and another portion of the air in the environment where the housing (3) is located can enter the air inlet cavity through the lower air inlet (341). The air in the air inlet cavity enters the fan blade cavity (15) through the fan blade cavity inlet (153).

10. The air duct device according to claim 9, characterized in that, The air duct device is equipped with a simultaneous air outlet from top and bottom, an air outlet from top, and an air outlet from bottom. When neither the upper air supply duct (13) nor the lower air supply duct (14) is connected to the auxiliary air duct (17), a portion of the air in the fan blade cavity (15) can be discharged through the upper air supply duct (13), the upper air outlet duct (211) and the upper air outlet (331), and another portion of the air in the fan blade cavity (15) can be discharged through the lower air supply duct (14), the lower air outlet duct (221) and the lower air outlet (311), and the air duct device can operate the simultaneous upper and lower air outlet mode; When the air duct device forms the upper air outlet main flow path and the upper air outlet secondary flow path, a part of the air in the fan blade cavity (15) can be discharged through the upper air outlet main flow path and the upper air outlet duct (211), and another part of the air in the fan blade cavity (15) can be discharged through the upper air outlet secondary flow path and the upper air outlet duct (211). The air duct device can operate the upper air outlet mode. When the air duct device forms the lower air outlet main flow path and the lower air outlet secondary flow path, a part of the air in the fan blade cavity (15) can be discharged through the lower air outlet main flow path and the lower air outlet duct (221), and another part of the air in the fan blade cavity (15) can be discharged through the lower air outlet secondary flow path and the lower air outlet duct (221). The air duct device can operate the lower air outlet mode.

11. A cabinet-type air conditioner, characterized in that, The device includes an indoor unit, which includes an indoor heat exchanger (4) and a duct device as described in any one of claims 1 to 10; the indoor heat exchanger (4) is disposed on the air inlet side of the fan blade cavity inlet (153).

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