Air duct control part, air duct assembly and cabinet type air conditioner indoor unit

Abstract

The invention provides an air duct control part, an air duct assembly and a cabinet type air conditioner indoor unit. A ventilation device forms an air duct, and the air duct is provided with a first ventilation opening, a second ventilation opening and a third ventilation opening; the air duct control component comprises a first baffle, a second baffle, a first driving assembly and a second driving assembly, the A1 end of the first baffle is hinged to the side wall of the air duct, and the B1 end of the first baffle is hinged to the A2 end of the second baffle; the first driving assembly can drive the whole baffle assembly to rotate; the second driving assembly can drive the second baffle to rotate relative to the first baffle; when the first baffle and the second baffle are in a folded state, the third ventilation opening can be blocked, so that the first ventilation opening is communicated with the second ventilation opening; when the first baffle and the second baffle are in the stretching state, the first ventilation opening and the second ventilation opening can be disconnected, the first ventilation opening and the third ventilation opening are communicated, a flow guide face is formed between the first baffle and the second baffle, and air in the air duct can be smoothly guided to the third ventilation opening.

Description

Technical Field

[0001] The present invention belongs to the technical field of ventilation, and particularly relates to an air duct control component, an air duct assembly and a cabinet-type air conditioner indoor unit. Background Art

[0002] In existing ventilation equipment, in order to connect one air inlet with different air outlets, a baffle is provided at each air outlet to control the opening or closing of the baffle for the corresponding air outlet, so that the air inlet and the air outlet can be connected or disconnected; the baffle occupies a large space, and there is a lack of a necessary flow guiding structure between the air inlet and the air outlet, resulting in a large air flow resistance, a small air volume and a large noise. Summary of the Invention

[0003] In view of this, the present invention provides an air duct control component, an air duct assembly and a cabinet-type air conditioner indoor unit to solve the problems in the prior art that when one air inlet is connected with different air outlets, there is a lack of a necessary flow guiding structure, resulting in a large air flow resistance, a small air volume and a large noise.

[0004] The present invention provides an air duct control component for a ventilation device, the ventilation device forming an air duct, the air duct being provided with a first ventilation opening and a second ventilation opening, the first ventilation opening and the second ventilation opening being oppositely arranged along the extending direction of the air duct; a third ventilation opening is formed on the side wall of the air duct between the first ventilation opening and the second ventilation opening; the air duct control component is used to be arranged in the air duct and control the selective connection or disconnection of the first ventilation opening and the second ventilation opening and the first ventilation opening and the third ventilation opening; the air duct control component includes a baffle assembly and a driving assembly;

[0005] The baffle assembly includes a first baffle and a second baffle, the first baffle and the second baffle being arranged together in a foldable and extendable manner; wherein:

[0006] The first baffle has an A1 end and a B1 end which are oppositely arranged, and the second baffle has an A2 end and a B2 end which are oppositely arranged; the A1 end, the B1 end and the A2 end are all hinged ends, the A1 end is used to be hinged to the side wall of the air duct, the B1 end and the A2 end are hinged together; the B2 end is a free end;

[0007] The driving assembly includes a first driving assembly and a second driving assembly; wherein:

[0008] The first driving assembly is drivingly connected to the first baffle and is used to drive the baffle assembly to rotate integrally around the hinge axis of the A1 end;

[0009] The second driving assembly is drivingly connected to the second baffle and is used to drive the second baffle to rotate around the hinge axis of the B1 end and the A2 end;

[0010] When the first baffle and the second baffle are in a folded state, the third vent can be blocked, so that the first vent and the second vent are connected;

[0011] When the first baffle and the second baffle are in the extended state, the first vent and the second vent can be disconnected, so that the first vent is connected to the third vent.

[0012] Further optionally, the B1 end is formed with an axial hole, the A2 end is formed with a rotating shaft, and the rotating shaft is rotatably disposed in the axial hole;

[0013] The second driving assembly includes a driving gear and a driven gear, the driving gear is used to be arranged in the air duct, and the driven gear is connected to the rotating shaft in a transmission manner; when the baffle assembly rotates as a whole and the driven gear and the driving gear are meshed, the driving gear drives the driven gear to rotate, so that the first baffle and the second baffle can be in a folded state or an extended state.

[0014] The present invention also provides an air duct assembly, comprising a volute structure and an air duct control component as described in any one of the above items; the volute structure forms a main air duct, the main air duct forms the first vent and the second vent, and a third vent is formed on the side wall of the main air duct between the first vent and the second vent; the air duct control component is arranged in the main air duct, and the A1 end is hinged on the side wall of the main air duct and is close to the third vent.

[0015] Further optionally, the volute structure is further formed with a blade cavity; the main air duct and the blade cavity are connected through the second vent;

[0016] The air duct assembly further includes a shell, the volute structure is arranged inside the shell and a shell air duct is formed between the volute structure and the shell; the main air duct and the shell air duct are connected through the third vent;

[0017] When the first baffle and the second baffle are in a folded state and block the third vent, the main air duct and the shell air duct are not connected, and the main air duct and the fan blade cavity are connected;

[0018] When the first baffle and the second baffle are in an extended state and block the first vent and the second vent, the main air duct is connected to the shell air duct, and the main air duct is not connected to the blade cavity.

[0019] Further optionally, an upper air inlet is formed in the upper part of the housing, and a lower air inlet is formed in the lower part of the housing. Both the upper air inlet and the lower air inlet communicate with the interior of the room. The main air duct includes an upper main air duct and a lower main air duct, and the air blade cavity includes an upper air blade cavity and a lower air blade cavity. The upper main air duct, the upper air blade cavity, the lower air blade cavity, and the lower main air duct are arranged in sequence from top to bottom. The first ventilation opening of the upper main air duct communicates with the upper air inlet, and the second ventilation opening of the upper main air duct communicates with the upper air blade cavity. The third ventilation opening of the upper main air duct is an upper air return opening, and the upper air return opening communicates the upper main air duct and the housing air duct. One air duct control component is arranged in the upper main air duct, and the air duct control component includes a first upper baffle and a second upper baffle.

[0020] The first ventilation opening of the lower main air duct communicates with the lower air inlet, and the second ventilation opening of the lower main air duct communicates with the lower air blade cavity. The third ventilation opening of the lower main air duct is a lower air return opening, and the lower air return opening communicates the lower main air duct and the housing air duct. Another air duct control component is arranged in the lower main air duct, and the air duct control component includes a first lower baffle and a second lower baffle.

[0021] The upper air blade cavity communicates with the housing air duct through the upper air blade cavity inlet, and the lower air blade cavity communicates with the housing air duct through the lower air blade cavity inlet.

[0022] When the first upper baffle and the second upper baffle are in a folded or extended state, and the first lower baffle and the second lower baffle are in a folded or extended state, the air duct assembly forms an upper air outlet main flow path with air entering from the lower air inlet and exiting from the upper air outlet, or a lower air outlet main flow path with air entering from the upper air inlet and exiting from the lower air outlet.

[0023] Further optionally, when the first upper baffle and the second upper baffle are in a folded state, and the first lower baffle and the second lower baffle are in an extended state, the upper air return opening is in a closed state while the upper main air duct communicates with the upper air blade cavity, the lower air return opening is in an open state while the lower main air duct does not communicate with the lower air blade cavity, the first lower baffle and the second lower baffle form a lower guiding surface, and the air duct assembly forms the upper air outlet main flow path.

[0024] When the first upper baffle and the second upper baffle are in an extended state, and the first lower baffle and the second lower baffle are in a folded state, the upper air return opening is in an open state while the upper main air duct does not communicate with the upper air blade cavity, the lower air return opening is in a closed state while the lower main air duct communicates with the lower air blade cavity, the first upper baffle and the second upper baffle form an upper guiding surface, and the air duct assembly forms the lower air outlet main flow path.

[0025] Further optionally, the side wall of the upper main air duct includes an upper main air duct front side wall and an upper main air duct rear side wall. The upper return air opening is formed in the upper main air duct rear side wall, and the A1 end of the first upper baffle is hinged to the upper main air duct rear side wall. When the first upper baffle and the second upper baffle are in the folded state, the first upper baffle and the second upper baffle are abutted against the upper main air duct rear side wall. When the first upper baffle and the second upper baffle are in the extended state, the B2 end of the second upper baffle abuts against the upper main air duct front side wall.

[0026] The side wall of the lower main air duct includes a lower main air duct front side wall and a lower main air duct rear side wall. The lower return air opening is formed in the lower main air duct rear side wall, and the A1 connection end of the first lower baffle is hinged to the lower main air duct rear side wall. When the first lower baffle and the second lower baffle are in the folded state, the first lower baffle and the second lower baffle are abutted against the lower main air duct rear side wall. When the first lower baffle and the second lower baffle are in the extended state, the B2 end of the second lower baffle abuts against the lower main air duct front side wall.

[0027] Further optionally, an upper air inlet is further formed in the upper part of the housing, and a lower air inlet is further formed in the lower part of the housing. Both the upper air inlet and the lower air inlet are communicated with the room. The upper air inlet is communicated with the housing air duct and forms an upper auxiliary flow path, and the lower air inlet is communicated with the housing air duct and forms a lower auxiliary flow path.

[0028] The present invention further provides a cabinet-type air conditioner indoor unit, which includes an indoor heat exchanger and the air duct assembly described in any one of the above. The housing includes a housing left side wall and a housing right side wall. The upper air impeller cavity inlet includes an upper air impeller cavity left inlet and an upper air impeller cavity right inlet. The lower air impeller cavity inlet includes a lower air impeller cavity left inlet and a lower air impeller cavity right inlet. The upper air impeller cavity left inlet and the lower air impeller cavity left inlet are both arranged close to the housing left side wall, and the upper air impeller cavity right inlet and the lower air impeller cavity right inlet are both arranged close to the housing right side wall.

[0029] The indoor heat exchanger includes a left heat exchanger and a right heat exchanger. The left heat exchanger includes an upper left heat exchange section and a lower left heat exchange section. The upper left heat exchange section is arranged between the housing left side wall and the upper air impeller cavity left inlet, and the lower left heat exchange section is arranged between the housing left side wall and the lower air impeller cavity left inlet. The right heat exchanger includes an upper right heat exchange section and a lower right heat exchange section. The upper right heat exchange section is arranged between the housing right side wall and the upper air impeller cavity right inlet, and the lower right heat exchange section is arranged between the housing right side wall and the lower air impeller cavity right inlet.

[0030] Further optionally, a left upper heat exchange area is formed between the left upper heat exchange section and the left side wall of the housing, and a left lower heat exchange area is formed between the left lower heat exchange section and the left side wall of the housing; a right upper heat exchange area is formed between the right upper heat exchange section and the right side wall of the housing, and a right lower heat exchange area is formed between the right lower heat exchange section and the right side wall of the housing;

[0031] From top to bottom, both the left upper heat exchange area and the right upper heat exchange area are in a tapered form; from bottom to top, both the left lower heat exchange area and the right lower heat exchange area are in a tapered form.

[0032] Compared with the prior art, the beneficial effects of the present invention mainly lie in:

[0033] The baffle assembly can rotate integrally around the hinge axis at end A1, and the second baffle rotates around the hinge axes at ends B1 and A2, so that the first baffle and the second baffle can be folded and extended; when the first baffle and the second baffle are in the folded state, the third ventilation opening can be blocked, so that the first ventilation opening and the second ventilation opening are communicated, reducing the occupied space of the baffle assembly and enabling air to flow smoothly through the first ventilation opening and the second ventilation opening; when the first baffle and the second baffle are in the extended state, the first ventilation opening and the second ventilation opening can be disconnected, so that the first ventilation opening and the third ventilation opening are communicated, and the first baffle and the second baffle form a flow guiding surface, which can smoothly guide the air entering the air duct through the first ventilation opening to the third ventilation opening, reducing the air flow resistance and noise and improving the air output. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0035] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0036] Figure 1a 、 Figure 1b and Figure 1c is a schematic structural diagram of an embodiment of the air duct control component provided by the present invention;

[0037] Figure 2a is a schematic structural diagram of an embodiment when the first baffle and the second baffle are in the closed position provided by the present invention;

[0038] Figure 2b A schematic diagram of the structure of an embodiment of the present invention when the first baffle and the second baffle are in a transition position;

[0039] Figure 2c A schematic diagram of the structure of an embodiment of the present invention when the first baffle and the second baffle are in the diversion position;

[0040] Figure 3 A schematic diagram of the structure of an embodiment of a driving gear provided by the present invention;

[0041] Figure 4 A schematic diagram of the assembly structure of an embodiment of a cabinet-type air-conditioner indoor unit provided by the present invention;

[0042] Figure 5 A schematic diagram of the exploded structure of an embodiment of a cabinet-type air-conditioner indoor unit provided by the present invention;

[0043] Figure 6 A schematic diagram of the internal structure of an embodiment of a cabinet-type air-conditioning indoor unit provided by the present invention;

[0044] Figure 7a , Figure 7b and Figure 7c A schematic diagram of the assembly structure of an embodiment of an air duct assembly (without upper auxiliary air duct and lower auxiliary air duct) provided by the present invention;

[0045] Figure 8a A schematic diagram of the structure of an embodiment of the cabinet air conditioner indoor unit provided by the present invention when it is in the upper air outlet mode;

[0046] Figure 8b A schematic diagram of the structure of an embodiment of the cabinet air conditioner indoor unit provided by the present invention when it is in a downward air outlet mode;

[0047] In the figure:

[0048] 1-housing; 11-housing front side wall; 111-lower air outlet; 12-housing left side wall; 13-housing right side wall; 14-housing rear side wall; 141-lower air inlet; 15-housing top wall; 151-upper air outlet; 152-upper air inlet; 16-housing air duct; 17-base;

[0049] 2 - Air duct assembly; 21 - Volute; 22 - Volute cover; 23 - Upper air blade cavity; 231 - Upper air blade cavity inlet; 232 - Upper air blade cavity outlet; 233 - Upper air blade; 24 - Lower air blade cavity; 241 - Lower air blade cavity inlet; 242 - Lower air blade cavity outlet; 243 - Lower air blade; 25 - Upper main air duct; 251 - Rear side wall of upper main air duct; 252 - Front side wall of upper main air duct; 253 - Upper air return opening; 26 - Lower main air duct; 261 - Rear side wall of lower main air duct; 262 - Front side wall of lower main air duct; 263 - Lower air return opening; 27 - Upper ventilation shell; 271 - Upper auxiliary air duct; 28 - Lower ventilation shell; 281 - Lower auxiliary air duct; 29 - Air guide shell;

[0050] 31 - First baffle; 32 - Second baffle; 311 - First upper baffle; 312 - First lower baffle; 321 - Second upper baffle; 322 - Second lower baffle; 33 - Driving gear; 34 - Driven gear;

[0051] 41 - Upper left heat exchange section; 42 - Lower left heat exchange section; 43 - Upper right heat exchange section; 44 - Lower right heat exchange section. Detailed implementation manners

[0052] The following specific embodiments illustrate the implementation manners 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 part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0054] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0055] It should also be noted that the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such commodity or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including said element.

[0056] In existing ventilation equipment, in order to connect one air inlet with different air outlets, a baffle is provided at each air outlet to control the opening or closing of the corresponding air outlet, so that the air inlet can be connected or disconnected from the air outlet; the baffle takes up a large space, and there is a lack of a necessary flow guiding structure between the air inlet and the air outlet, resulting in large air flow resistance, small air output and high noise.

[0057] The present invention creatively provides an air duct control component for ventilation equipment. The ventilation equipment forms an air duct, and the air duct is provided with a first ventilation port and a second ventilation port. A third ventilation port is formed on the side wall of the air duct between the first ventilation port and the second ventilation port; the air duct control component is used to be arranged in the air duct and the air duct control component includes a baffle assembly and a driving assembly; the baffle assembly includes a first baffle and a second baffle. The A1 end of the first baffle is used to be hinged to the side wall of the air duct, the B1 end of the first baffle is hinged to the A2 end of the second baffle, and the B2 end of the second baffle is a free end; the driving assembly includes a first driving assembly and a second driving assembly; the first driving assembly is drivingly connected to the first baffle and is used to drive the whole baffle assembly to rotate around the hinge axis of the A1 end; the second driving assembly is drivingly connected to the second baffle and is used to drive the second baffle to rotate around the hinge axis of the B1 end and the A2 end, so that the first baffle and the second baffle can be folded or extended.

[0058] When the first baffle and the second baffle are in a folded state, the third ventilation port can be blocked, so that the first ventilation port and the second ventilation port are connected, reducing the occupied space of the baffle assembly and enabling air to flow smoothly through the first ventilation port and the second ventilation port; when the first baffle and the second baffle are in an extended state, the first ventilation port and the second ventilation port can be disconnected, so that the first ventilation port and the third ventilation port are connected, and a flow guiding surface is formed between the first baffle and the second baffle, which can smoothly guide the air entering the air duct through the first ventilation port to the third ventilation port, reducing the air flow resistance and noise and increasing the air output.

[0059] <Air duct control component>

[0060] As Figures 1a to 3As shown in the figure, this embodiment provides an air duct control component for a ventilation device. The ventilation device is formed with an air duct, and the air duct is provided with a first ventilation opening and a second ventilation opening, and the first ventilation opening and the second ventilation opening are oppositely arranged along the extending direction of the air duct; a third ventilation opening is formed on the side wall of the air duct between the first ventilation opening and the second ventilation opening; the first ventilation opening, the second ventilation opening, and the third ventilation opening can all intake or exhaust air; the air duct control component is used to be arranged in the air duct and control the first ventilation opening and the second ventilation opening, and the first ventilation opening and the third ventilation opening to be selectively communicated or disconnected; the air duct control component includes a baffle component and a driving component;

[0061] The baffle component includes a first baffle 31 and a second baffle 32, and the first baffle 31 and the second baffle 32 are arranged together in a foldable and extendable manner; wherein:

[0062] The first baffle 31 has an A1 end and a B1 end which are oppositely arranged, and the second baffle 32 has an A2 end and a B2 end which are oppositely arranged; the A1 end, the B1 end, and the A2 end are all hinged ends, the A1 end is used to be hinged to the side wall of the air duct, the B1 end and the A2 end are hinged together; the B2 end is a free end; the first baffle 31 and the second baffle 32 can be flat plates or arc-shaped plates;

[0063] The driving component includes a first driving component and a second driving component; wherein:

[0064] The first driving component is drivingly connected to the first baffle 31 and is used to drive the whole baffle component to rotate around the hinge axis of the A1 end; specifically, the first driving component includes a first driving motor, the output shaft of the first driving motor is drivingly connected to the A1 end, when the first driving motor operates, the baffle component can rotate around the hinge axis of the A1 end as a whole; the first driving motor is a stepping motor;

[0065] The second driving component is drivingly connected to the second baffle 32 and is used to drive the second baffle 32 to rotate around the hinge axis of the B1 end and the A2 end, and the second baffle 32 extends and folds relative to the first baffle 31;

[0066] When the first baffle 31 and the second baffle 32 are in the folded state, the third ventilation opening can be blocked, the first ventilation opening and the second ventilation opening are communicated, the occupied space of the baffle component is reduced, and the air can smoothly flow through the first ventilation opening and the second ventilation opening;

[0067] When the first baffle 31 and the second baffle 32 are in the extended state, the first ventilation opening and the second ventilation opening can be disconnected, the first ventilation opening and the third ventilation opening are communicated and the first baffle 31 and the second baffle 32 form a flow guiding surface, and the air entering the air duct through the first ventilation opening can be smoothly guided to the third ventilation opening, reducing the air flow resistance and noise, and improving the air output volume.

[0068] In view of the problem of complex structure of the second driving assembly, this embodiment proposes that a shaft hole is formed at the B1 end, a rotating shaft is formed at the A2 end, and the rotating shaft is rotatably disposed in the shaft hole;

[0069] The second driving assembly includes a driving gear 33 and a driven gear 34. The driving gear 33 is used to be arranged in the air duct and the position of the driving gear 33 remains unchanged. The driven gear 34 is connected to the rotating shaft and can move with the baffle assembly. When the baffle assembly rotates as a whole and the driven gear 34 and the driving gear 33 are meshed, the driving gear 33 drives the driven gear 34 to rotate, so that the first baffle 31 and the second baffle 32 are in a folded state or an extended state. Specifically, the driving gear 33 is an incomplete gear including a toothless portion and a toothed portion.

[0070] The first baffle 31 and the second baffle 32 have a closing position, a diversion position and a transition position between the closing position and the diversion position; when the first baffle 31 and the second baffle 32 are in the closing position, the first baffle 31 and the second baffle 32 are in a folded state, the third vent can be closed and the first vent and the second vent are connected; when the first baffle 31 and the second baffle 32 are in the transition position, the driving gear 33 and the driven gear 34 are meshed, and the driving gear 33 drives the driven gear 34 to rotate, so that the first baffle 31 and the second baffle 32 can switch between the folded state and the extended state, and then transition to the closing position or the diversion position; when the first baffle 31 and the second baffle 32 are in the diversion position, the first baffle 31 and the second baffle 32 are in an extended state, the third vent can be opened, the first vent and the third vent are connected, and the first vent and the second vent are not connected, and the first baffle 31 and the second baffle 32 are formed with a diversion surface, which can guide the air in the air duct to the third vent;

[0071] like Figure 2a As shown, the first baffle 31 and the second baffle 32 are in the closed position, at which time the first baffle 31 and the second baffle 32 are in a folded state; when the first driving motor drives the first baffle 31 and the second baffle 32 to rotate clockwise as a whole to the transition position, as shown Figure 2b As shown, the driven gear 34 overlaps the toothless portion of the driving gear 33 to control the rotation of the driving gear 33, the toothed portion of the driving gear 33 meshes with the driven gear 34, and drives the second baffle 32 to rotate clockwise, so that the second baffle 32 is unfolded relative to the first baffle 31 and the B2 end of the second baffle 32 abuts against the side wall of the air duct, so that the third vent is opened and the first vent and the second vent are connected, as shown in FIG. Figure 2cAs shown in the figure; at this time, the first baffle 31 and the second baffle 32 are spliced to form a diversion surface. The diversion surface is a curved surface structure and is adapted to the profile structure of the air duct, which can smoothly guide the air in the air duct to the third ventilation opening, reducing the air volume loss; at the same time, the driving gear 33 is fixedly arranged, which plays a limiting role for both the first baffle 31 and the second baffle 32, avoiding noise generated by the vibration of the first baffle 31 and the second baffle 32 when the air flows.

[0072] When the toothed part of the driving gear 33 meshes with the driven gear 34 and drives the second baffle 32 to rotate counterclockwise, then the second baffle 32 folds relative to the first baffle 31; then the first driving motor drives the first baffle 31 and the second baffle 32 to rotate counterclockwise as a whole to the closed position, and at this time, the first baffle 31 and the second baffle 32 can close the third ventilation opening.

[0073] <Air duct assembly>

[0074] As Figures 6 to 7c shown, this embodiment also provides an air duct assembly 2, which includes a volute structure and the air duct control component of any one of the above; the volute structure forms a main air duct, the main air duct forms a first ventilation opening and a second ventilation opening, and a third ventilation opening is formed on the side wall of the main air duct between the first ventilation opening and the second ventilation opening; the air duct control component is arranged in the main air duct, and the A1 end is hinged on the side wall of the main air duct and close to the third ventilation opening.

[0075] Furthermore, the volute structure also forms a fan cavity; the main air duct and the fan cavity are communicated through the second ventilation opening; the air duct assembly 2 also includes a housing 1, the volute structure is arranged inside the housing 1 and a housing air duct 16 is formed between the volute structure and the housing 1; the main air duct and the housing air duct 16 are communicated through the third ventilation opening.

[0076] When the first baffle 31 and the second baffle 32 are in the folded state and block the third ventilation opening, the main air duct and the housing air duct 16 are not communicated and the main air duct and the fan cavity are communicated;

[0077] When the first baffle 31 and the second baffle 32 are in the extended state and block the first ventilation opening and the second ventilation opening, the main air duct and the housing air duct 16 are communicated and the main air duct and the fan cavity are not communicated.

[0078] In view of the problem of the single air outlet mode of the air duct assembly 2, this embodiment proposes that an upper air outlet 151 is formed in the upper part of the housing 1, and a lower air outlet 111 is formed in the lower part of the housing 1. Both the upper air outlet 151 and the lower air outlet 111 communicate with the interior of the room; the main air duct includes an upper main air duct 25 and a lower main air duct 26, and the air impeller cavity includes an upper air impeller cavity 23 and a lower air impeller cavity 24; the upper air impeller cavity 23 includes an upper air impeller cavity inlet 231 and an upper air impeller cavity outlet 232, and the lower air impeller cavity 24 includes a lower air impeller cavity inlet 241 and a lower air impeller cavity outlet 242; the upper main air duct 25, the upper air impeller cavity 23, the lower air impeller cavity 24 and the lower main air duct 26 are arranged in sequence from top to bottom; the first ventilation port of the upper main air duct 25 communicates with the upper air outlet 151, and the second ventilation port of the upper main air duct 25 communicates with the upper air impeller cavity outlet 232; the third ventilation port of the upper main air duct 25 is an upper air return port 253, and the upper air return port 253 communicates the upper main air duct 25 with the housing air duct 16; a duct control component is arranged in the upper main air duct 25, and the duct control component includes a first upper baffle 311 and a second upper baffle 321;

[0079] The first ventilation port of the lower main air duct 26 communicates with the lower air outlet 111, and the second ventilation port of the lower main air duct 26 communicates with the lower air impeller cavity outlet 242; the third ventilation port of the lower main air duct 26 is a lower air return port 263, and the lower air return port 263 communicates the lower main air duct 26 with the housing air duct 16; another duct control component is arranged in the lower main air duct 26, and the duct control component includes a first lower baffle 312 and a second lower baffle 322;

[0080] The upper air impeller cavity 23 communicates with the housing air duct 16 through the upper air impeller cavity inlet 231, and an upper air impeller 233 is rotatably arranged in the upper air impeller cavity 23; the lower air impeller cavity 24 communicates with the housing air duct 16 through the lower air impeller cavity inlet 241, and a lower air impeller 243 is rotatably arranged in the lower air impeller cavity 24; both the upper air impeller 233 and the lower air impeller 243 are centrifugal air impellers;

[0081] Specifically, the housing 1 includes a front housing side wall 11, a rear housing side wall 14, a left housing side wall 12, a right housing side wall 13, a top housing wall 15, and a base 17. The front housing side wall 11 and the rear housing side wall 14 are arranged opposite to each other front and back. The left housing side wall 12 and the right housing side wall 13 are arranged opposite to each other left and right. The top housing wall 15 and the base 17 are arranged opposite to each other up and down. The front housing side wall 11, the left housing side wall 12, the rear housing side wall 14, and the right housing side wall 13 are connected in sequence. A lower air inlet 111 is formed on the lower side of the front housing side wall 11, and the lower air inlet 111 is close to the base 17. An upper air inlet 151 is formed on the top housing wall 15, and a wind guide housing 29 is arranged at the upper air inlet 151 for guiding the air flowing out of the upper air inlet 151. An upper air inlet 231 is formed on each of the two axial sides of the upper airfoil cavity 23, and the air in the housing air duct 16 can enter the upper airfoil cavity 23 through the upper air inlet 231. A lower air inlet 241 is formed on each of the two axial sides of the lower airfoil cavity 24, and the air in the housing air duct 16 can enter the lower airfoil cavity 24 through the lower air inlet 241. The air in the upper main air duct 25 can enter the housing air duct 16 through the upper air return opening 253, and the air in the lower main air duct 26 can enter the housing air duct 16 through the lower air return opening 263.

[0082] The volute structure includes a volute 21 and a volute cover 22. The volute 21 and the volute cover 22 are cooperatively connected to form an upper main air duct 25, an upper airfoil cavity 23, a lower airfoil cavity 24, and a lower main air duct 26. The air duct assembly 2 further includes an upper ventilation housing 27 and a lower ventilation housing 28. Both the upper ventilation housing 27 and the lower ventilation housing 28 are arranged inside the housing 1. The upper ventilation housing 27 is arranged on the top of the upper main air duct 25 and forms an upper auxiliary air duct 271. The upper auxiliary air duct 271 communicates the upper air inlet 151 and the upper main air duct 25. The lower ventilation housing 28 is arranged at the bottom of the lower main air duct 26 and forms a lower auxiliary air duct 281. The lower auxiliary air duct 281 communicates the lower air inlet 111 and the lower main air duct 26.

[0083] When the first upper baffle 311 and the second upper baffle 321 are in a folded or extended state, and the first lower baffle 312 and the second lower baffle 322 are in a folded or extended state, the air duct assembly 2 forms an upper air outlet main flow path with air entering from the lower air inlet 111 and exiting from the upper air inlet 151, or a lower air outlet main flow path with air entering from the upper air inlet 151 and exiting from the lower air inlet 111.

[0084] Further, when the first upper baffle 311 and the second upper baffle 321 are in the folded state, and the first lower baffle 312 and the second lower baffle 322 are in the extended state, the upper air return opening 253 is in the closed state while the upper main air duct 25 is communicated with the upper air blade cavity 23, the lower air return opening 263 is in the open state while the lower main air duct 26 is not communicated with the lower air blade cavity 24. The first lower baffle 312 and the second lower baffle 322 form a lower flow guiding surface, and the air duct assembly 2 forms an upper air outlet main flow path. When the upper air blade 233 rotates, indoor air can enter the lower main air duct 26 through the lower air inlet 111, enter the housing air duct 16 through the lower flow guiding surface and the lower air return opening 263, then flow through the upper air blade cavity 23 and the upper main air duct 25 in sequence, and be discharged through the upper air outlet 151.

[0085] When the first upper baffle 311 and the second upper baffle 321 are in the extended state, and the first lower baffle 312 and the second lower baffle 322 are in the folded state, the upper air return opening 253 is in the open state while the upper main air duct 25 is not communicated with the upper air blade cavity 23, the lower air return opening 263 is in the closed state while the lower main air duct 26 is communicated with the lower air blade cavity 24. The first upper baffle 311 and the second upper baffle 321 form an upper flow guiding surface, and the air duct assembly 2 forms a lower air outlet main flow path. When the lower air blade 243 rotates, indoor air can enter the upper main air duct 25 through the upper air inlet 151, enter the housing 1 cavity through the upper flow guiding surface and the upper air return opening 253, then flow through the lower air blade cavity 24 and the lower main air duct 26 in sequence, and be discharged through the lower air inlet 111.

[0086] The structures of the upper flow guiding surface and the lower flow guiding surface can both be adjusted to achieve different flow guiding effects.

[0087] In view of the problem that the positions of the upper air return opening 253 and the lower air return opening 263 are not set properly, in this embodiment, the side wall of the upper main air duct 25 includes an upper main air duct front side wall 252 and an upper main air duct rear side wall 251. The upper main air duct rear side wall 251 forms the upper air return opening 253, and the A1 end of the first upper baffle 311 is hinged to the upper main air duct rear side wall 251. When the first upper baffle 311 and the second upper baffle 321 are in the folded state, the first upper baffle 311 and the second upper baffle 321 are abutted against the upper main air duct rear side wall 251. When the first upper baffle 311 and the second upper baffle 321 are in the extended state, the B2 end of the second upper baffle 321 abuts against the upper main air duct front side wall 252.

[0088] The air duct control components arranged in the upper main air duct 25 further include an upper driving gear and an upper driven gear. The upper driving gear is fixedly arranged in the upper main air duct 25 and can rotate in the upper main air duct 25. The upper driven gear is in transmission connection with the rotating shaft of the second upper baffle 321. When the upper driven gear rotates integrally with the first upper baffle 311 and the second upper baffle 321 and meshes with the upper driving gear, the upper driving gear drives the upper driven gear to rotate, which can make the first upper baffle 311 and the second upper baffle 321 be in the folded state or the extended state.

[0089] The side wall of the lower main air duct 26 includes a front side wall 262 and a rear side wall 261 of the lower main air duct. An air return opening 263 is formed on the rear side wall 261 of the lower main air duct. The A1 connection end of the first lower baffle 312 is hinged to the rear side wall 261 of the lower main air duct. When the first lower baffle 312 and the second lower baffle 322 are in the folded state, the first lower baffle 312 and the second lower baffle 322 are abutted against the rear side wall 261 of the lower main air duct. When the first lower baffle 312 and the second lower baffle 322 are in the extended state, the B2 end of the second lower baffle 322 abuts against the front side wall 262 of the lower main air duct.

[0090] The air duct control components provided in the lower main air duct 26 further include a lower driving gear and a lower driven gear. The lower driving gear is fixedly arranged in the lower main air duct 26 and can rotate in the lower main air duct 26. The lower driven gear is in transmission connection with the rotating shaft of the second lower baffle 322. When the lower driven gear rotates integrally with the first lower baffle 312 and the second lower baffle 322 and meshes with the lower driving gear, the lower driving gear drives the lower driven gear to rotate, so that the first lower baffle 312 and the second lower baffle 322 can be in the folded state or the extended state.

[0091] In addition, an upper air inlet 152 is formed in the upper part of the housing 1, and a lower air inlet 141 is formed in the lower part of the housing 1. Both the upper air inlet 152 and the lower air inlet 141 communicate with the room. The upper air inlet 152 communicates with the housing air duct 16 and forms an upper auxiliary flow path, and the lower air inlet 141 communicates with the housing air duct 16 and forms a lower auxiliary flow path. Specifically, the upper air inlet 152 is formed on the top wall 15 of the housing, and the upper air inlet 152 is located at the rear side of the upper air outlet 151. The lower air inlet 141 is formed in the lower part of the rear side wall 14 of the housing.

[0092] When the first upper baffle 311 and the second upper baffle 321 are in the folded state, and the first lower baffle 312 and the second lower baffle 322 are in the folded state, the air duct assembly 2 forms an upper and lower simultaneous air outlet main flow path with air outlet from both the upper air outlet 151 and the lower air outlet 111.

[0093] <Floor-standing air conditioner indoor unit>

[0094] As Figures 3 to 8b shown, this embodiment further provides a floor-standing air conditioner indoor unit, which includes an indoor heat exchanger and the air duct assembly 2 according to any one of the above. The housing 1 includes a left side wall 12 and a right side wall 13 of the housing. The upper air vane cavity inlet 231 includes a left inlet and a right inlet of the upper air vane cavity, and the lower air vane cavity inlet 241 includes a left inlet and a right inlet of the lower air vane cavity. The left inlet of the upper air vane cavity and the left inlet of the lower air vane cavity are both arranged close to the left side wall 12 of the housing, and the right inlet of the upper air vane cavity and the right inlet of the lower air vane cavity are both arranged close to the right side wall 13 of the housing.

[0095] The indoor heat exchanger includes a left heat exchanger and a right heat exchanger. The left heat exchanger includes an upper left heat exchange section 41 and a lower left heat exchange section 42. The upper left heat exchange section 41 is arranged between the left side wall 12 of the housing and the left inlet of the upper air blade cavity. The lower left heat exchange section 42 is arranged between the left side wall 12 of the housing and the left inlet of the lower air blade cavity. The right heat exchanger includes an upper right heat exchange section 43 and a lower right heat exchange section 44. The upper right heat exchange section 43 is arranged between the right side wall 13 of the housing and the right inlet of the upper air blade cavity. The lower right heat exchange section 44 is arranged between the right side wall 13 of the housing and the right inlet of the lower air blade cavity.

[0096] Furthermore, an upper left heat exchange area is formed between the upper left heat exchange section 41 and the left side wall 12 of the housing, and a lower left heat exchange area is formed between the lower left heat exchange section 42 and the left side wall 12 of the housing. An upper right heat exchange area is formed between the upper right heat exchange section 43 and the right side wall 13 of the housing, and a lower right heat exchange area is formed between the lower right heat exchange section 44 and the right side wall 13 of the housing.

[0097] From top to bottom, both the upper left heat exchange area and the upper right heat exchange area are in a gradually shrinking form. From bottom to top, both the lower left heat exchange area and the lower right heat exchange area are in a gradually shrinking form.

[0098] Specifically, both the upper left heat exchange section 41 and the lower left heat exchange section 42 are plate heat exchangers. The upper left heat exchange section 41 and the lower left heat exchange section 42 are arranged in a zigzag structure that protrudes towards the left side wall 12 of the housing.

[0099] Both the upper right heat exchange section 43 and the lower right heat exchange section 44 are plate heat exchangers. The upper right heat exchange section 43 and the lower right heat exchange section 44 are arranged in a zigzag structure that protrudes towards the right side wall 13 of the housing.

[0100] The upper left heat exchange section 41 and the lower left heat exchange section 42 satisfy: 90° ≤ ɑ ≤ 180°. The upper right heat exchange section 43 and the lower right heat exchange section 44 satisfy: 90° ≤ β ≤ 180°.

[0101] Wherein, ɑ is the angle between the heat exchange surface of the upper left heat exchange section 41 and the heat exchange surface of the lower left heat exchange section 42, and β is the angle between the heat exchange surface of the upper right heat exchange section 43 and the heat exchange surface of the lower right heat exchange section 44.

[0102] The cabinet-type air conditioner indoor unit is provided with an upper air outlet mode and a lower air outlet mode. When the two upper baffles are in the closed position and the two lower baffles are in the diversion position, the upper air blades 233 rotate, and indoor air can enter the lower main air duct 26 through the lower air outlet 111, enter the housing air duct 16 through the lower return air outlet 263, flow through the left heat exchanger and the right heat exchanger, then enter the upper air blade cavity 23 through the upper air blade cavity inlet 231, and be discharged through the upper main air duct 25 and the upper air outlet 151 to achieve upper air outlet. At this time, the cabinet-type air conditioner indoor unit can operate in the cooling mode.

[0103] When the two upper baffles are in the diversion position and the two lower baffles are in the closed position, the lower air blade 243 rotates, and indoor air can enter the upper main air duct 25 through the upper air inlet 151, enter the housing air duct 16 through the upper return air inlet 253, flow through the left heat exchanger and the right heat exchanger, then enter the lower air blade cavity 24 through the lower air blade cavity inlet 241, and be discharged through the air duct and the lower air outlet 111 to achieve downward air outlet; at this time, the cabinet-type air conditioner indoor unit can operate in the heating mode.

[0104] The lower diversion surface is used to smoothly guide the air in the lower main air duct 26 to the housing air duct 16, and the upper diversion surface is used to smoothly guide the air in the upper main air duct 25 to the housing air duct 16, improving the ventilation flow rate and reducing the air pressure loss. By making full use of the principle that cold air sinks during refrigeration and hot air rises during heating, the airflow range is expanded, a large swirling eddy is formed in the room where the indoor unit is located, the temperature change speed of the indoor air is increased, the vertical temperature difference in the room is reduced, the temperature distribution of the indoor air is made uniform, air flow short-circuit is avoided, and the air comfort is improved.

[0105] The exemplary embodiments of the present disclosure have been specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, arrangements or implementation methods described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An air duct control component for a ventilation device, the ventilation device being formed with an air duct, the air duct being provided with a first ventilation opening and a second ventilation opening, the first ventilation opening and the second ventilation opening being oppositely arranged along the extending direction of the air duct; a third ventilation opening is formed on the side wall of the air duct between the first ventilation opening and the second ventilation opening; the air duct control component is used to be arranged in the air duct and control the first ventilation opening and the second ventilation opening and the first ventilation opening and the third ventilation opening to be selectively communicated or disconnected; characterized in that, The air duct control component includes a baffle assembly and a drive assembly; The baffle assembly comprises a first baffle and a second baffle, wherein the first baffle and the second baffle are foldably and extendably arranged together; wherein: The first baffle has an A1 end and a B1 end that are oppositely disposed, and the second baffle has an A2 end and a B2 end that are oppositely disposed; the A1 end, the B1 end and the A2 end are all hinged ends, the A1 end is used to be hinged to the side wall of the air duct, the B1 end and the A2 end are hinged together; the B2 end is a free end; The drive assembly comprises a first drive assembly and a second drive assembly; wherein: The first driving assembly is drivingly connected to the first baffle plate, and is used to drive the baffle plate assembly to rotate as a whole around the hinge axis of the A1 end; The second driving assembly is drivingly connected to the second baffle plate, and is used to drive the second baffle plate to rotate around the hinge axis of the B1 end and the A2 end; When the first baffle and the second baffle are in a folded state, the third vent can be blocked, so that the first vent and the second vent are connected; When the first baffle and the second baffle are in the extended state, the first vent and the second vent can be disconnected, so that the first vent is connected to the third vent.

2. The air duct control component according to claim 1, characterized in that The B1 end is formed with an axial hole, and the A2 end is formed with a rotating shaft, and the rotating shaft is rotatably disposed in the axial hole; The second driving assembly includes a driving gear and a driven gear, the driving gear is used to be arranged in the air duct, and the driven gear is connected to the rotating shaft in a transmission manner; when the baffle assembly rotates as a whole and the driven gear and the driving gear are meshed, the driving gear drives the driven gear to rotate, so that the first baffle and the second baffle can be in a folded state or an extended state.

3. An air duct assembly, characterized in that, It comprises a volute structure and an air duct control component as claimed in any one of claims 1 to 2; the volute structure forms a main air duct, the main air duct forms the first vent and the second vent, and a third vent is formed on the side wall of the main air duct between the first vent and the second vent; the air duct control component is arranged in the main air duct, and the A1 end is hinged on the side wall of the main air duct and close to the third vent.

4. The air duct assembly according to claim 3, wherein, The volute structure is also formed with a blade cavity; the main air duct and the blade cavity are connected through the second vent; The air duct assembly further includes a shell, the volute structure is arranged inside the shell and a shell air duct is formed between the volute structure and the shell; the main air duct and the shell air duct are connected through the third vent; When the first baffle and the second baffle are in a folded state and block the third vent, the main air duct and the shell air duct are not connected, and the main air duct and the fan blade cavity are connected; When the first baffle and the second baffle are in an extended state and block the first vent and the second vent, the main air duct is connected to the shell air duct, and the main air duct is not connected to the blade cavity.

5. The air duct assembly according to claim 4, wherein, An upper air inlet is formed in the upper part of the housing, and a lower air inlet is formed in the lower part of the housing. Both the upper air inlet and the lower air inlet communicate with the interior of the room. The main air duct includes an upper main air duct and a lower main air duct, and the air blade cavity includes an upper air blade cavity and a lower air blade cavity. The upper main air duct, the upper air blade cavity, the lower air blade cavity, and the lower main air duct are arranged in sequence from top to bottom. The first ventilation opening of the upper main air duct communicates with the upper air inlet, and the second ventilation opening of the upper main air duct communicates with the upper air blade cavity. The third ventilation opening of the upper main air duct is an upper air return opening, and the upper air return opening communicates the upper main air duct with the housing air duct. A duct control component is arranged in the upper main air duct, and the duct control component includes a first upper baffle and a second upper baffle. The first ventilation opening of the lower main air duct communicates with the lower air inlet, and the second ventilation opening of the lower main air duct communicates with the lower air blade cavity. The third ventilation opening of the lower main air duct is a lower air return opening, and the lower air return opening communicates the lower main air duct with the housing air duct. Another duct control component is arranged in the lower main air duct, and the duct control component includes a first lower baffle and a second lower baffle. The upper air blade cavity communicates with the housing air duct through an upper air blade cavity inlet, and the lower air blade cavity communicates with the housing air duct through a lower air blade cavity inlet. When the first upper baffle and the second upper baffle are in a folded or extended state, and the first lower baffle and the second lower baffle are in a folded or extended state, the duct assembly forms an upper air outlet main flow path with air entering from the lower air inlet and exiting from the upper air outlet, or a lower air outlet main flow path with air entering from the upper air inlet and exiting from the lower air outlet.

6. The air duct assembly according to claim 5, wherein, When the first upper baffle and the second upper baffle are in a folded state, and the first lower baffle and the second lower baffle are in an extended state, the upper air return opening is in a closed state while the upper main air duct communicates with the upper air blade cavity, the lower air return opening is in an open state while the lower main air duct does not communicate with the lower air blade cavity, the first lower baffle and the second lower baffle form a lower guide surface, and the duct assembly forms the upper air outlet main flow path. When the first upper baffle and the second upper baffle are in an extended state, and the first lower baffle and the second lower baffle are in a folded state, the upper air return opening is in an open state while the upper main air duct does not communicate with the upper air blade cavity, the lower air return opening is in a closed state while the lower main air duct communicates with the lower air blade cavity, the first upper baffle and the second upper baffle form an upper guide surface, and the duct assembly forms the lower air outlet main flow path.

7. The air duct assembly according to claim 5, characterized in that, The side wall of the upper main air duct includes an upper main air duct front side wall and an upper main air duct rear side wall. The upper main air duct rear side wall forms the upper air return opening, and the A1 end of the first upper baffle is hinged to the upper main air duct rear side wall. When the first upper baffle and the second upper baffle are in a folded state, the first upper baffle and the second upper baffle are attached to the upper main air duct rear side wall. When the first upper baffle and the second upper baffle are in an extended state, the B2 end of the second upper baffle abuts against the upper main air duct front side wall. The side wall of the lower main air duct includes a front side wall of the lower main air duct and a rear side wall of the lower main air duct. The rear side wall of the lower main air duct is formed with the lower return air inlet, and the A1 connection end of the first lower baffle is hinged on the rear side wall of the lower main air duct. When the first lower baffle and the second lower baffle are in a folded state, the first lower baffle and the second lower baffle are abutted against the rear side wall of the lower main air duct. When the first lower baffle and the second lower baffle are in an extended state, the B2 end of the second lower baffle abuts against the front side wall of the lower main air duct.

8. The air duct assembly according to claim 5, wherein, An upper air inlet is further formed in the upper part of the housing, and a lower air inlet is further formed in the lower part of the housing. Both the upper air inlet and the lower air inlet communicate with the room. The upper air inlet communicates with the housing air duct and forms an upper auxiliary flow path, and the lower air inlet communicates with the housing air duct and forms a lower auxiliary flow path.

9. A cabinet-type air conditioner indoor unit, characterized in that, It includes an indoor heat exchanger and the air duct assembly according to any one of claims 5 to 8. The housing includes a left side wall of the housing and a right side wall of the housing. The upper air impeller cavity inlet includes a left upper air impeller cavity inlet and a right upper air impeller cavity inlet, and the lower air impeller cavity inlet includes a left lower air impeller cavity inlet and a right lower air impeller cavity inlet. The left upper air impeller cavity inlet and the left lower air impeller cavity inlet are both arranged close to the left side wall of the housing, and the right upper air impeller cavity inlet and the right lower air impeller cavity inlet are both arranged close to the right side wall of the housing. The indoor heat exchanger includes a left heat exchanger and a right heat exchanger. The left heat exchanger includes an upper left heat exchange section and a lower left heat exchange section. The upper left heat exchange section is arranged between the left side wall of the housing and the left upper air impeller cavity inlet, and the lower left heat exchange section is arranged between the left side wall of the housing and the left lower air impeller cavity inlet. The right heat exchanger includes an upper right heat exchange section and a lower right heat exchange section. The upper right heat exchange section is arranged between the right side wall of the housing and the right upper air impeller cavity inlet, and the lower right heat exchange section is arranged between the right side wall of the housing and the right lower air impeller cavity inlet.

10. The cabinet-type air conditioner indoor unit according to claim 9, characterized in that, An upper left heat exchange area is formed between the upper left heat exchange section and the left side wall of the housing, and a lower left heat exchange area is formed between the lower left heat exchange section and the left side wall of the housing. An upper right heat exchange area is formed between the upper right heat exchange section and the right side wall of the housing, and a lower right heat exchange area is formed between the lower right heat exchange section and the right side wall of the housing. From top to bottom, both the upper left heat exchange area and the upper right heat exchange area are in a gradually shrinking form. From bottom to top, both the lower left heat exchange area and the lower right heat exchange area are in a gradually shrinking form.

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