A duct machine and distributed air supply device

Abstract

The present invention provides a duct machine and a distributed air supply device, the duct machine includes: a casing, a fan, a heat exchanger, a lower return air port and a lower air outlet, the fan and the heat exchanger are both located in the casing, the lower return air port is arranged at the lower end of the casing to suck air from the bottom of the casing, the lower air outlet is also arranged at the lower end of the casing to discharge air toward the bottom of the casing, the duct machine returns air only through the lower return air port, and discharges air only through the lower air outlet, the lower return air port and the lower air outlet are arranged at intervals in the horizontal direction, the lower return air port can suck air into the casing, and pass through the heat exchanger and the fan and blow it out from the lower air outlet. According to the present invention, the unit does not need rear return air and front return air, only uses the lower outlet and lower return air, the structure is simple, installation and disassembly maintenance are convenient, the processing difficulty is reduced, it is more concealed, there is no opening on the front of the user's ceiling, it is both beautiful and cost-saving.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to an air duct unit and a distributed air supply device. Background Art

[0002] In recent years, the market share of household central air conditioners has been increasing because the indoor unit is installed on the ceiling (also known as ducted air conditioners), which has the advantages of beautiful installation and small space. The current mainstream ducted air conditioners have two air outlets, one for air outlet and one for air inlet.

[0003] The shell usually has openings on multiple sides, which is complex in structure, inconvenient to install and disassemble for maintenance, inconvenient to produce, and high in cost. In addition, most of the existing mainstream duct units have air outlet and return air on two perpendicular sides, which is neither beautiful nor cost-effective. More and more users are demanding products with air supply and return air in one direction.

[0004] Users’ demand for aesthetics makes the concealment of the vent location an important consideration for customers when purchasing.

[0005] Since the duct air conditioner in the prior art usually has openings on multiple surfaces of the shell, the structure is complex, inconvenient to install and disassemble for maintenance, inconvenient to produce, and the cost is high. In addition, most of the existing mainstream duct air conditioner structures have air outlet and return air on two perpendicular surfaces, which is neither beautiful nor saves installation costs. Therefore, the present invention studies and designs a duct air conditioner and a distributed air supply device. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the duct machine in the prior art, such as the openings on multiple surfaces of the shell, the complex structure, and the inconvenience in installation, disassembly and maintenance, thereby providing a duct machine and a distributed air supply device.

[0007] In order to solve the above problems, the present invention provides a duct machine, which includes:

[0008] A casing, a fan, a heat exchanger, a lower return air inlet and a lower air outlet, wherein the fan and the heat exchanger are both located in the casing, the lower return air inlet is arranged at the lower end of the casing to draw air from the bottom of the casing, and the lower air outlet is also arranged at the lower end of the casing to discharge air toward the bottom of the casing, the duct air conditioner only returns air through the lower return air inlet and only discharges air through the lower air outlet, the lower return air inlet and the lower air outlet are arranged at intervals in the horizontal direction, the lower return air inlet can suck air into the casing, pass through the heat exchanger and the fan, and blow it out from the lower air outlet.

[0009] In some embodiments, the fan and the heat exchanger are arranged between the lower return air inlet and the lower air outlet, and the heat exchanger includes a first heat exchange part and a second heat exchange part, and the first heat exchange part is connected or adjacent to the second heat exchange part and forms a first bending structure.

[0010] In some embodiments, the fan includes a crossflow blade, and in the projection plane of the vertical plane, the heat exchanger is a U-shaped heat exchanger, and the heat exchanger also includes a third heat exchange portion and a fourth heat exchange portion, the third heat exchange portion is connected or adjacent to the fourth heat exchange portion and forms a second bending structure, and the second heat exchange portion is connected or adjacent to the third heat exchange portion and forms a third bending structure;

[0011] An air duct is arranged inside the casing, the fan and the heat exchanger are located in the air duct, and the air duct is also a U-shaped air duct.

[0012] In some embodiments, the fan includes axial flow blades, and in the projection surface of the vertical plane, the heat exchanger is a V-shaped heat exchanger. An air duct is provided inside the casing, and the fan and the heat exchanger are located in the air duct, and the air duct is also a U-shaped air duct.

[0013] In some embodiments, the fan includes centrifugal blades, and in the projection surface of the vertical plane, the heat exchanger is a V-shaped heat exchanger. An air duct is provided inside the casing, and the fan and the heat exchanger are located in the air duct, and the air duct is also a U-shaped air duct.

[0014] In some embodiments, a guide device is further provided at the lower air outlet. In cooling mode, the guide device can be controlled to move to blow the airflow upward or sideways. In heating mode, the guide device can be controlled to move to blow the airflow downward.

[0015] In some embodiments, the lower air return outlet is arranged close to a wall relative to the lower air outlet.

[0016] The present invention also provides a distributed air supply device, which includes the air duct machine described in any of the preceding items, and also includes a suspended ceiling, the air duct machine is arranged inside the suspended ceiling, and a first air outlet and a second air outlet are arranged at the bottom of the suspended ceiling, the first air outlet is opposite to and connected to the lower return air outlet, and the second air outlet is opposite to and connected to the lower air outlet.

[0017] In some embodiments, the lower air outlet is connected to the second air outlet via a flexible material; and a preset gap is provided between the lower air return outlet and the first air outlet.

[0018] In some embodiments, a maintenance opening is also provided at the bottom of the suspended ceiling.

[0019] The duct machine and distributed air supply device provided by the present invention have the following beneficial effects:

[0020] The present invention sets a lower return air port and a lower air outlet at the lower end of the casing, so that the air intake of the duct machine only enters from the lower return air port, and the air outlet only exits from the lower air outlet. The unit only includes the lower air outlet, so that the unit does not need rear return air and front return air, and only uses the lower outlet and lower return air. The structure is simple, convenient for installation and disassembly maintenance, reduces the difficulty of processing, is more concealed, and has no opening on the front of the user's ceiling, which is both beautiful and saves installation costs, and does not affect the customer's decoration style. In addition, the duct machine unit of the present invention has only one lower maintenance port, does not need a front opening, does not include a front engineering maintenance port, is more convenient, and has a more beautiful appearance. The air outlet of the present invention is designed with a guide device to blow hot air downward as much as possible, and cold air to the side or upward, thereby alleviating the problem that a single air outlet cannot take into account the requirements of hot and cold air outlets at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the internal structure of the duct unit of Example 1 of the present invention;

[0022] Figure 2a A schematic diagram of the internal structure of a duct unit according to Embodiment 2 of the present invention;

[0023] Figure 2b Another schematic diagram of the internal structure of the duct unit of the embodiment 2 of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of a duct unit according to Embodiment 3 of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the flow guide device part of the air duct unit of the present invention (in heating mode);

[0026] Figure 5 It is a structural schematic diagram of the flow guide device part of the air duct unit of the present invention (in cooling mode);

[0027] Figure 6 It is a schematic diagram of the structure of the supply and return air positions of the distributed air supply device of the present invention.

[0028] The reference numerals are:

[0029] 1. Casing; 10. Air duct; 2. Fan; 21. Crossflow fan blade; 22. Axial flow fan blade; 23. Centrifugal fan blade; 3. Heat exchanger; 31. First heat exchange section; 32. Second heat exchange section; 33. Third heat exchange section; 34. Fourth heat exchange section; 4. Lower return air outlet; 5. Lower air outlet; 6. Flow guide device; 7. Duct machine; 8. Ceiling; 81. First air outlet; 82. Second air outlet; 9. Flexible material. DETAILED DESCRIPTION

[0030] like Figure 1-6 The present invention provides a duct machine, which comprises:

[0031] A casing 1, a fan 2, a heat exchanger 3, a lower return air inlet 4 and a lower air outlet 5, wherein the fan 2 and the heat exchanger 3 are both located in the casing 1, the lower return air inlet 4 is arranged at the lower end of the casing 1 to draw air from the bottom of the casing 1, and the lower air outlet 5 is also arranged at the lower end of the casing 1 to discharge air toward the bottom of the casing 1, the duct air conditioner returns air only through the lower return air inlet 4, and discharges air only through the lower air outlet 5, the lower return air inlet 4 and the lower air outlet 5 are arranged at intervals in the horizontal direction, and the lower return air inlet 4 can inhale air flow into the casing 1, pass through the heat exchanger 3 and the fan 2, and blow it out from the lower air outlet 5.

[0032] This solution proposes a new type of distributed air supply duct machine structure in response to the needs of the background technology.

[0033] The present invention arranges a lower return air inlet and a lower air outlet at the lower end of the casing, so that the air intake of the duct machine only comes from the lower return air inlet, and the air outlet only comes from the lower air outlet. The unit only includes the lower air outlet, so that the unit does not need rear return air and front return air, and only uses the lower outlet and lower return air. The structure is simple, and installation, disassembly and maintenance are convenient, the processing difficulty is reduced, and the unit is more concealed. There is no opening on the front of the user's ceiling, which is both beautiful and saves installation costs without affecting the customer's decoration style.

[0034] The present invention: 1. The unit only includes the lower air outlet, and the air outlet has a flange edge installed with the engineering air outlet. (Lower outlet and lower return), which reduces the difficulty of processing. The air duct is a U-shaped air duct, which fits the U-shaped condenser, making the structure more compact, and realizing the technical difficulties of the industry that the air inlet and outlet are on the same plane, reducing the difficulty and cost of processing. In order to prevent backflow, although the air inlet and outlet are on the same horizontal plane, they are staggered in the horizontal direction. The air outlet is close to the front of the machine, and the return air outlet is relatively far back to avoid backflow. The guide plate guides the outlet air into the room, and it will not flow back and enter the return air outlet;

[0035] 2. The unit includes a set of return air vents, and the return air vents are arranged on the rear side of the air outlet, front air outlet, rear return air vents, which are concealed, reduce working hours, and are beautiful; the unit does not need rear return air and front return air, and adopts return air on both sides of the lower outlet, which is more concealed, and there is no opening on the front of the user's ceiling, which does not affect the customer's decoration style;

[0036] 3. The unit should have at least one engineering maintenance opening on the bottom or (and) side, but not on the front, for easy maintenance and aesthetics;

[0037] 4. Design a guide device at the air outlet to blow the hot air downward as much as possible and the cold air to the side, which can partially alleviate the problem that a single air outlet cannot meet the requirements of both hot and cold air outlets at the same time.

[0038] In some embodiments, the fan 2 and the heat exchanger 3 are arranged between the lower return air port 4 and the lower air outlet 5, and the heat exchanger 3 includes a first heat exchange part 31 and a second heat exchange part 32, wherein the first heat exchange part 31 and the second heat exchange part 32 are connected or adjacent to each other and the two form a first bending structure. This is a preferred structural form of the heat exchanger of the present invention. The bending structure formed by the two heat exchange parts can increase the heat exchange area with the airflow along the flow direction of the airflow. The fan and the heat exchanger are located between the lower return air port and the lower air outlet, so that the airflow enters the shell from the lower return air port and is discharged from the lower air outlet through the heat exchange of the heat exchanger and the suction of the fan, thereby forming an effective heat exchange for the gas.

[0039] Embodiment 1, as Figure 1 In some embodiments, the fan 2 includes a crossflow blade 21. In the projection plane of the vertical plane, the heat exchanger is a U-shaped heat exchanger. The heat exchanger also includes a third heat exchange portion 33 and a fourth heat exchange portion 34. The third heat exchange portion 33 is connected to or adjacent to the fourth heat exchange portion 34 and forms a second bending structure. The second heat exchange portion 32 is connected to or adjacent to the third heat exchange portion 33 and forms a third bending structure.

[0040] An air duct 10 is disposed inside the casing 1 , and the fan 2 and the heat exchanger 3 are located in the air duct, which is also a U-shaped air duct.

[0041] This is the preferred structural form of Example 1 of the present invention, that is, the fan includes a structural form of cross-flow blades, the heat exchanger is a U-shaped structure formed by multiple bends, and can be sucked by the rotation of the cross-flow blades to form a multi-area heat exchange effect, and the air duct is a U-shaped air duct matching the heat exchanger to increase the heat exchange area.

[0042] The present invention Figure 1 The unit preferably uses cross-flow blades, and along the air flow direction, the cross-flow blades are in front of the evaporator. The air flow passes through the return air port to the evaporator, the cross-flow blades, and flows out from the air outlet.

[0043] Embodiment 2, as shown in Figures 2-3, in some embodiments, the fan 2 includes axial flow blades 22, and in the projection plane of the vertical plane, the heat exchanger is a V-shaped heat exchanger, and the housing 1 is provided with an air duct 10, and the fan 2 and the heat exchanger 3 are located in the air duct, and the air duct is also a U-shaped air duct. This is the preferred structural form of embodiment 2 of the present invention, that is, the fan includes an axial flow blade structure, and the airflow is sucked by the rotation of the axial flow blade. The V-shaped heat exchanger cooperates with the axial flow blade to increase the heat exchange area along the flow direction of the airflow, and the air duct is a U-shaped air duct that matches the heat exchanger to increase the heat exchange area.

[0044] In some embodiments, along the air flow direction, the axial flow blades 22 are located at the upstream end or downstream end of the heat exchanger 3. As shown in FIG. 2 , the axial flow blades are located at the upstream end of the heat exchanger. Figure 3 As shown, the axial flow blades are located at the downstream end of the heat exchanger.

[0045] As shown in FIG. 2 , the unit of the present invention may also use axial flow fan blades to achieve the effect of bottom return and bottom discharge. The axial flow fan blades may be installed in front of the evaporator or behind the evaporator.

[0046] Embodiment 3, as Figure 4 In some embodiments, the fan 2 includes centrifugal blades 23. In the projection plane of the vertical plane, the heat exchanger is a V-shaped heat exchanger. An air duct 10 is provided inside the housing 1. The fan 2 and the heat exchanger 3 are located in the air duct, and the air duct is also a U-shaped air duct. This is the preferred structural form of Example 3 of the present invention, that is, the fan includes a structural form of centrifugal blades, and the airflow is sucked by the rotation of the centrifugal blades. The V-shaped heat exchanger cooperates with the centrifugal blades to increase the heat exchange area along the flow direction of the airflow. The air duct is a U-shaped air duct that matches the heat exchanger to increase the heat exchange area. That is, the unit of the present invention can preferably use a centrifugal fan to achieve the effect of bottom out and bottom back.

[0047] The unit of the present invention adopts cross-flow blades as the optimal solution, and also includes solutions of using axial flow, centrifugal, and mixed flow blades instead of cross-flow blades.

[0048] In some embodiments, the lower air outlet 5 is further provided with a guide device 6. In cooling mode, the guide device 6 can be controlled to move so as to blow the airflow upward or to the side. In heating mode, the guide device 6 can be controlled to move so as to blow the airflow downward. The guide device is designed at the air outlet of the present invention so as to blow the hot air downward as much as possible and the cold air to the side or upward, thereby alleviating the problem that a single air outlet cannot meet the requirements of both hot and cold air outlets.

[0049] The present invention Figure 4,5 The air outlet is designed with a guide plate. By controlling the opening of the guide plate, the cold air is blown upward as much as possible, and the hot air is blown downward as much as possible. The indoor air is mixed as much as possible through the sweeping air, making the indoor temperature as uniform as possible. The problem of a single air outlet being difficult to take into account the transmission of cold air and hot air at the same time is avoided as much as possible.

[0050] In some embodiments, the lower return air vent 4 is arranged close to the wall relative to the lower air outlet 5. This is a further preferred structural form of the duct air conditioner of the present invention. The lower return air vent is close to the wall relative to the lower air outlet, and the lower return air is carried out from the wall, and the lower air outlet is close to the front for lower air discharge. The front of the duct air conditioner has no opening, which is convenient for installation and maintenance, and more beautiful.

[0051] like Figure 6 The present invention preferably allows air to enter from the return air port at the side and rear, exchange heat through the evaporator, and finally flow out from the air outlet near the front middle. There is a certain distance between the air outlet and the return air port in the horizontal direction, and the air guide plate controls the air outlet direction to prevent the airflow blown out of the air outlet from being re-inhaled by the return air port, resulting in useless work.

[0052] The present invention also provides a duct indoor unit with downward air outlet and downward air return. Preferably, the unit comprises two air outlets, the air outlet far from the wall and close to the room is used as the air outlet, and the air outlet close to the wall is used as the return air outlet, and the air outlet has a flange edge connected to the engineering air outlet.

[0053] The present invention also provides a distributed air supply device, which includes the air duct machine 7 described in any of the preceding items, and also includes a suspended ceiling 8, wherein the air duct machine 7 is arranged inside the suspended ceiling 8, and the bottom of the suspended ceiling 8 is provided with a first air outlet 81 and a second air outlet 82, wherein the first air outlet 81 is opposite to and connected with the lower return air outlet 4, and the second air outlet 82 is opposite to and connected with the lower air outlet 5. The distributed air supply device of the present invention includes an air duct machine and a suspended ceiling, wherein air enters the air duct machine through the first air outlet at the bottom of the suspended ceiling to the lower return air outlet, and enters the air duct machine, and after heat exchange, the airflow is discharged along the second air outlet through the lower air outlet of the air duct machine.

[0054] In some embodiments, the lower air outlet 5 and the second air outlet 82 are connected by a flexible material 9; a preset gap is provided between the lower return air outlet 4 and the first air outlet 81. Preferably, the gap is less than 15 mm. The present invention can also form a sealing effect for the airflow by means of the flexible material provided between the lower air outlet and the second air outlet to prevent it from being sucked back to the lower return air outlet; a preset gap is provided between the lower return air outlet and the first air outlet so that the rest of the bottom of the duct machine except the lower air outlet can be made into a lower return air outlet, thereby increasing the return air area and improving the heat exchange capacity. Preferably, there is a certain gap between the lower return air outlet of the unit and the bottom of the unit to ensure the reliability of the lower return air outlet.

[0055] The unit of the present invention can return air through a portion of the grille outside the air outlet, and the area of ​​the grille installed in the project is larger than the outlet air area.

[0056] The lower air outlet of the unit of the present invention is preferably connected to the ceiling through a flexible material such as canvas.

[0057] In some embodiments, a maintenance port (not shown) is also provided at the bottom of the ceiling 8. The duct unit of the present invention has only one lower maintenance port, does not require a front opening, and does not include a front engineering maintenance port, which is more convenient and more beautiful in appearance. The unit of the present invention preferably includes a maintenance port located below, through which components can be maintained. This modification eliminates the need for an opening on the front of the ceiling, ensuring that the customer's ceiling will not have an opening that affects the appearance.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A distributed air supply device, Features: The invention comprises a duct machine (7) and a suspended ceiling (8), wherein the duct machine (7) is arranged inside the suspended ceiling (8), and a first air outlet (81) and a second air outlet (82) are arranged at the bottom of the suspended ceiling (8). The duct machine comprises: a casing (1), a fan (2), a heat exchanger (3), a lower return air outlet (4) and a lower air outlet (5), wherein the first air outlet (81) is opposite to and communicates with the lower return air outlet (4), and the second air outlet (82) is opposite to and communicates with the lower air outlet (5); the fan (2) and the heat exchanger (3) are both located in the casing (1), and the A lower return air port (4) is arranged at the lower end of the casing (1) to draw air from below the casing (1); the lower air outlet (5) is also arranged at the lower end of the casing (1) to discharge air toward below the casing (1); the ducted air conditioner returns air only through the lower return air port (4) and discharges air only through the lower air outlet (5); the lower return air port (4) and the lower air outlet (5) are arranged at intervals in the horizontal direction; the lower return air port (4) can draw air into the casing (1), pass through the heat exchanger (3) and the fan (2), and blow out from the lower air outlet (5); The lower air outlet (5) and the second air outlet (82) are connected via a flexible material (9); a preset gap is provided between the lower air return outlet (4) and the first air outlet (81); A maintenance opening is also provided at the bottom of the suspended ceiling (8).

2. The distributed air supply device according to claim 1, Features: The fan (2) and the heat exchanger (3) are arranged between the lower return air port (4) and the lower air outlet (5); the heat exchanger (3) comprises a first heat exchange portion (31) and a second heat exchange portion (32); the first heat exchange portion (31) and the second heat exchange portion (32) are connected or adjacent to each other and form a first bending structure.

3. The distributed air supply device according to claim 2, Features: The fan (2) comprises a cross-flow blade (21); within a projection plane of a vertical plane, the heat exchanger is a U-shaped heat exchanger; the heat exchanger further comprises a third heat exchange portion (33) and a fourth heat exchange portion (34); the third heat exchange portion (33) is connected to or adjacent to the fourth heat exchange portion (34) and forms a second bending structure; the second heat exchange portion (32) is connected to or adjacent to the third heat exchange portion (33) and forms a third bending structure; An air duct (10) is provided inside the casing (1), the fan (2) and the heat exchanger (3) are located in the air duct, and the air duct is also a U-shaped air duct.

4. The distributed air supply device according to claim 2, Features: The fan (2) comprises an axial flow fan blade (22); in the projection plane of the vertical plane, the heat exchanger is a V-shaped heat exchanger; an air duct (10) is provided inside the casing (1); the fan (2) and the heat exchanger (3) are located in the air duct; and the air duct is also a U-shaped air duct.

5. The distributed air supply device according to claim 2, Features: The fan (2) comprises centrifugal fan blades (23); in the projection plane of the vertical plane, the heat exchanger is a V-shaped heat exchanger; an air duct (10) is provided inside the casing (1); the fan (2) and the heat exchanger (3) are located in the air duct; and the air duct is also a U-shaped air duct.

6. The distributed air supply device according to any one of claims 1 to 5, Features: The lower air outlet (5) is also provided with a flow guide device (6). In cooling mode, the flow guide device (6) can be controlled to move so as to blow the airflow upward or to the side. In heating mode, the flow guide device (6) can be controlled to move so as to blow the airflow downward.

7. The distributed air supply device according to any one of claims 1 to 5, Features: The lower air return port (4) is arranged close to the wall relative to the lower air outlet (5).

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