Air duct system, air conditioner and control method of air duct system

Abstract

The application discloses a wind channel system, a control method thereof and an air conditioner. The wind channel system comprises a shell, the shell has an air inlet side, an air outlet side, a first wind channel and a second wind channel which are communicated with each other, a first heat exchanger is arranged in the first wind channel, and a second heat exchanger is arranged in the second wind channel. The first wind channel and the second wind channel are communicated through a first air passing channel, one end of the first air passing channel is communicated with an air outlet side of the first heat exchanger, and the other end of the first air passing channel is communicated with an air inlet side of the second heat exchanger. A first air door is arranged corresponding to the first air passing channel to open or close the first air passing channel. The technical scheme is favorable for improving the adaptability of the air conditioning system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a duct system, an air conditioner, and a control method for the duct system. Background Technology

[0002] As people's living standards improve, their demands for air conditioners are also increasing. Due to the complexity of the weather, people sometimes need cooling to lower the temperature, sometimes heating to keep warm, and sometimes dehumidification when the temperature changes little. However, traditional air conditioners have limited functions and cannot meet people's needs. Summary of the Invention

[0003] The main objective of this invention is to provide an air duct system designed to improve the adaptability of air conditioners and meet user needs.

[0004] To achieve the above objectives, the present invention proposes an air duct system comprising:

[0005] The housing has an air inlet side, an air outlet side, and a first air duct and a second air duct connecting the air inlet side and the air outlet side;

[0006] A first heat exchanger is installed in the first air duct, and a second heat exchanger is installed in the second air duct.

[0007] The first air duct and the second air duct are connected through a first air passage. One end of the first air passage is connected to the air outlet side of the first heat exchanger, and the other end is connected to the air inlet side of the second heat exchanger.

[0008] The first air damper is provided corresponding to the first air passage to open or close the first air passage.

[0009] Optionally, the first air duct and the second air duct are arranged adjacent to each other, and the first air passage is opened on the common side wall of the first air duct and the second air duct.

[0010] Optionally, the first damper is positioned corresponding to the second heat exchanger and is rotatably connected to the common sidewall or the second heat exchanger.

[0011] Optionally, a second damper is provided in the second air duct that can be opened and closed, and the first air passage is connected to the second air duct at a position between the second damper and the second heat exchanger.

[0012] Optionally, the second damper is rotatably connected to the first heat exchanger, or rotatably connected to the common sidewall of the corresponding first heat exchanger, wherein the common sidewall is the common sidewall of the first air duct and the second air duct.

[0013] Optionally, the first damper has a first position for blocking the first air passage, and the second damper has a first position for opening the second air passage, so that the first air passage and the second air passage are isolated from each other.

[0014] Optionally, the first damper has a second position for opening the first air passage and closing the first air duct, and the second damper has a second position for closing the second air duct, so that the airflow passes through the first heat exchanger and the second heat exchanger in sequence, or passes through the second heat exchanger and the first heat exchanger in sequence.

[0015] Optionally, the first damper has a third position that opens the first air passage and covers the air inlet or outlet side of the second heat exchanger, and the second damper has a third position that covers the air inlet or outlet side of the first heat exchanger, so as to reduce the heat exchange between the heat exchanger and the airflow.

[0016] Optionally, the first damper is located at a first working position, the second damper is located at a third position, and the first heat exchanger is used for cooling and / or the second heat exchanger is used for heating.

[0017] Optionally, the air duct system further includes an air outlet device disposed on the air outlet side. The air outlet device has a first air inlet, a second air inlet, and an air outlet. The first air inlet is connected to the first air duct, and the second air inlet is connected to the second air duct.

[0018] Optionally, the air duct system further includes:

[0019] A first damper assembly is provided corresponding to the first air inlet to adjust the air intake area of ​​the first air inlet; and / or,

[0020] The second damper assembly is provided corresponding to the second air inlet to adjust the air inlet area of ​​the second air inlet.

[0021] Optionally, the air duct system further includes a third damper assembly, which is provided corresponding to the air outlet to adjust the air outlet area.

[0022] Optionally, the air inlet side has a common air duct connecting the first air duct and the second air duct, a fan is installed in the common air duct, and the common air duct has an air inlet.

[0023] The present invention further proposes an air duct system, comprising:

[0024] The housing has an air inlet side, an air outlet side, and a first air duct and a second air duct connecting the air inlet side and the air outlet side, wherein the first air duct and the second air duct are independent of each other.

[0025] A first heat exchanger is installed in the first air duct, and a second heat exchanger is installed in the second air duct;

[0026] An air outlet device is provided on the air outlet side. The air outlet device has a first air inlet, a second air inlet, and an air outlet. The first air inlet is connected to the first air duct, and the second air inlet is connected to the second air duct.

[0027] Optionally, the air duct system further includes:

[0028] A first damper assembly is provided corresponding to the first air inlet to adjust the air intake area of ​​the first air inlet; and / or,

[0029] The second damper assembly is provided corresponding to the second air inlet to adjust the air inlet area of ​​the second air inlet.

[0030] Optionally, the air duct system further includes a third damper assembly, which is provided corresponding to the air outlet to adjust the air outlet area.

[0031] Optionally, the air inlet side has a common air duct connecting the first air duct and the second air duct, a fan is installed in the common air duct, and the common air duct has an air inlet.

[0032] Optionally, the air duct system includes multiple air outlet devices, each of which has a first air inlet connected to a first air duct and a second air inlet connected to a second air duct.

[0033] The present invention further proposes an air conditioner, including an outdoor unit and an air duct system;

[0034] The first heat exchanger of the air duct system is used for cooling or heating, and the second heat exchanger of the air duct system is used for cooling or heating.

[0035] The air duct system includes:

[0036] The housing has an air inlet side, an air outlet side, and a first air duct and a second air duct connecting the air inlet side and the air outlet side;

[0037] A first heat exchanger is installed in the first air duct, and a second heat exchanger is installed in the second air duct.

[0038] The first air duct and the second air duct are connected through a first air passage. One end of the first air passage is connected to the air outlet side of the first heat exchanger, and the other end is connected to the air inlet side of the second heat exchanger.

[0039] A first air damper, configured corresponding to the first air passage, is used to open or close the first air passage; or...

[0040] include:

[0041] The housing has an air inlet side, an air outlet side, and a first air duct and a second air duct connecting the air inlet side and the air outlet side, wherein the first air duct and the second air duct are independent of each other.

[0042] A first heat exchanger is installed in the first air duct, and a second heat exchanger is installed in the second air duct;

[0043] An air outlet device is provided on the air outlet side. The air outlet device has a first air inlet, a second air inlet, and an air outlet. The first air inlet is connected to the first air duct, and the second air inlet is connected to the second air duct.

[0044] Optionally, it includes an outdoor unit and an indoor unit, the outdoor unit including a compression mechanism and an outdoor heat exchanger, and the indoor unit including a first heat exchanger and a dehumidification throttling regulating device;

[0045] The air conditioner further includes: a discharge pipe connected to the discharge side of the compressor mechanism, a low-pressure suction pipe connected to the low-pressure suction side of the compressor mechanism, and sequentially connected to the discharge pipe, the outdoor heat exchanger, the dehumidification throttling adjustment device, the liquid-side piping of the first heat exchanger, and the gas-side piping connecting the first heat exchanger and the low-pressure suction pipe, thereby forming a dehumidification circuit.

[0046] The indoor unit also includes a second heat exchanger, a reheat throttling regulating device, and a heat circulation device for sending the heat or cold energy of the indoor unit into the room.

[0047] The air conditioner also includes high and low pressure piping and a branch pipe branching off from the discharge pipe. The high and low pressure piping connects the first intersection point of the liquid-side piping, the reheat throttling regulating device, the second heat exchanger and the branch pipe in sequence to form a reheat circuit. The first intersection point is located between the dehumidification throttling regulating device and the outdoor heat exchanger.

[0048] The air conditioner also includes a connecting pipe, one end of which is connected to the high and low pressure piping, and the other end is connected to the gas-side piping or to the low-pressure suction pipe.

[0049] A first control valve is installed on the branch pipe, and a second control valve is installed on the connecting pipe, so that the high and low pressure piping can be connected to the connecting pipe or to the branch pipe.

[0050] Optionally, the outdoor unit further includes a first switcher, which can switch between a first switching state and a second switching state.

[0051] In the first switching state, the first switch connects the liquid-side piping to the suction pipe and the gas-side piping to the discharge pipe.

[0052] In the second switching state, the first switch connects the liquid-side piping to the discharge pipe and the gas-side piping to the suction pipe.

[0053] The present invention further proposes a control method for a duct system, the control method for the duct system comprising:

[0054] Get the mode command;

[0055] Adjust the operating status of the first and second heat exchangers according to the mode instructions.

[0056] Adjust the positions of the first and second air dampers according to the mode instructions.

[0057] Optionally, the mode command includes a cooling mode command, and the steps of adjusting the operating state of the first heat exchanger and the second heat exchanger according to the mode command, and adjusting the position of the first damper and the second damper according to the mode command include:

[0058] Adjust the first and second heat exchangers to cooling mode according to the cooling mode command;

[0059] Adjust the first air damper to the first position that blocks the first air passage, and adjust the second air damper to the first position that opens the second air passage, so that the first air passage and the second air passage are isolated from each other.

[0060] Optionally, the mode command includes a dehumidification and reheat mode command, and the steps of adjusting the operating status of the first heat exchanger and the second heat exchanger according to the mode command, and adjusting the positions of the first damper and the second damper according to the mode command include:

[0061] According to the dehumidification and reheat mode command, the first heat exchanger is adjusted to cooling and the second heat exchanger is adjusted to heating.

[0062] Adjust the first damper to the second position where the first air passage is opened and the first air duct is closed, and adjust the second damper to the second position where the second air duct is closed, so that the airflow passes through the first heat exchanger and the second heat exchanger in sequence.

[0063] Optionally, the mode command includes a defrost mode command, and the step of adjusting the operating state of the first heat exchanger and the second heat exchanger according to the mode command; and adjusting the position of the first damper and the second damper according to the mode command includes:

[0064] Adjust the first and second heat exchangers to cooling mode according to the defrost mode command;

[0065] Adjust the first damper to the third position that opens the first air passage and covers the air inlet or outlet side of the second heat exchanger, and adjust the second damper to the third position that covers the air inlet or outlet side of the first heat exchanger.

[0066] Optionally, the mode command includes a non-sensory defrosting mode command, and the steps of adjusting the operating status of the first heat exchanger and the second heat exchanger according to the mode command, and adjusting the position of the first damper and the second damper according to the mode command include:

[0067] According to the command of the non-contact defrosting mode, the first heat exchanger is adjusted to cooling and the second heat exchanger is adjusted to heating.

[0068] Adjust the first damper to the first position that blocks the first air passage, and adjust the second damper to the third position that covers the air inlet or outlet side of the first heat exchanger.

[0069] The technical solution of this invention connects the first air duct and the second air duct to the air inlet and air outlet sides respectively, and sets a first heat exchanger in the first air duct and a second heat exchanger in the second air duct. A first air passage connects the air outlet side of the first heat exchanger and the air inlet side of the second heat exchanger. When the first damper is closed, air passes through the first and second heat exchangers respectively, achieving either cooling or heating. When the first damper is open, air passes through the first heat exchanger first and then the second heat exchanger. When the first heat exchanger cools and the second heat exchanger heats, dehumidification and reheating are achieved. Thus, the air duct system can perform cooling, heating, and dehumidification and reheating, increasing the functionality of the air conditioner and meeting user needs. Attached Figure Description

[0070] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0071] Figure 1 This is a schematic diagram of the structure of an embodiment of the air duct system of the present invention;

[0072] Figure 2 for Figure 1 A schematic diagram showing the positional relationship between the first and second heat exchangers in the right-side view.

[0073] Figure 3 This is a schematic diagram of the refrigerant system of an embodiment of the air conditioner of the present invention;

[0074] Figure 4 A schematic diagram of a structure where both the first and second heat exchangers are cooled;

[0075] Figure 5 A schematic diagram of a structure where both the first and second heat exchangers provide heating.

[0076] Figure 6 A schematic diagram of a structure where the first heat exchanger is used for cooling and the second heat exchanger is used for heating.

[0077] Figure 7 This is a schematic diagram of a structure where the first damper is located at station A1, the second damper is located at station B1, and both the first and second heat exchangers are used for heating.

[0078] Figure 8 This is a schematic diagram of a structure where the first damper is located at station A1, the second damper is located at station B1, and both the first and second heat exchangers are used for cooling.

[0079] Figure 9 This is a structural diagram showing that the first air damper is located at workstation A2 and the second air damper is located at workstation B2.

[0080] Figure 10 This is a schematic diagram of a structure where the first damper is located at station A1, the second damper is located at station B1, the first heat exchanger is used for cooling, and the second heat exchanger is used for heating.

[0081] Figure 11 This is a structural diagram showing that the first air damper is located at station A3 and the second air damper is located at station B3.

[0082] Figure 12 This is a structural diagram showing that the first air damper is located at station A1 and the second air damper is located at station B3.

[0083] Figure 13 This is a schematic diagram of the structure of a damper assembly of the duct system of the present invention;

[0084] Figure 14 This is a schematic diagram of another embodiment of a damper assembly in the duct system of the present invention;

[0085] Figure 15 This is a schematic diagram of the structure of another embodiment of the damper assembly of the air duct system of the present invention;

[0086] Figure 16 This is a schematic diagram of another embodiment of the damper assembly of the duct system of the present invention.

[0087] Explanation of icon numbers:

[0088]

[0089] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0090] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not 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 effort are within the scope of protection of the present invention.

[0091] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0092] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0093] This invention primarily proposes an air duct system, mainly applied in air conditioners, to enhance their functionality. By setting up mutually isolated first and second air ducts 510 and 520, users in different rooms or areas can obtain air at different temperatures (cool and / or hot) as needed, thereby meeting temperature regulation requirements. By making the areas of the first air inlet 710, the second air inlet 720, and the air outlet 730 adjustable, the required cooling capacity, heating capacity, and airflow for each room can be adjusted. Through the arrangement of the first damper 410, the second damper 420, and the first air passage, the air conditioner can efficiently achieve different required modes. The air duct system can be used in indoor units, but is not limited to placement indoors. Temperature regulation of different rooms can be achieved simply by having the air outlets 730 of different air outlet devices 700 lead to different rooms. Of course, in some embodiments, the air outlets 730 of different air outlet devices 700 can also be placed in different locations within the same room, thereby allowing for different temperature adjustments in different areas of the same room.

[0094] The following will mainly describe the specific structure of the air duct system. It is worth noting that, in order to more intuitively express the first, second, and third workstations of the first air damper, as well as the first, second, and third positions of the second air damper in the accompanying drawings, corresponding label names will be set in the following embodiments and specification drawings, such as: first workstation (A1 workstation), second workstation (A2 workstation), and third workstation (A3 workstation), and the first position (B1 workstation), second position (B2 workstation), and third position (B3 workstation) of the second air damper.

[0095] Reference Figures 1 to 3 In this embodiment of the invention, the air duct system includes:

[0096] The housing 200 has an air inlet side, an air outlet side, and a first air duct 510 and a second air duct 520 connecting the air inlet side and the air outlet side.

[0097] A first heat exchanger 310 is installed in the first air duct 510, and a second heat exchanger 320 is installed in the second air duct 520.

[0098] The first air duct 510 and the second air duct 520 are connected through a first air passage. One end of the first air passage is connected to the air outlet side of the first heat exchanger 310, and the other end is connected to the air inlet side of the second heat exchanger 320.

[0099] The first damper 410 is configured to open or close the first air passage.

[0100] Specifically, in this embodiment, the overall shape of the outer casing 200 can be varied, such as cuboid or columnar. The first air duct 510 and the second air duct 520 connect the air inlet side and the air outlet side, respectively. The relative positions of the first air duct 510 and the second air duct 520 can be varied, such as being far apart or adjacent. The first heat exchanger 310 and the second heat exchanger 320 can both cool and heat; that is, they can heat and cool simultaneously, or one can cool while the other heats. In this embodiment, the first air duct 510 and the second air duct 520 are arranged in parallel, sharing a common duct sidewall. The form of the first air passage connecting the first air duct 510 and the second air duct 520 can be varied; one end of the first air passage connects to the air outlet side of the first heat exchanger 310, and the other end connects to the air inlet side of the second heat exchanger 320. When the first damper 410 closes the first air passage, the first air duct 510 and the second air duct 520 are independent of each other. The air in the first air duct 510 exchanges heat with the first heat exchanger 310 and then flows to the air outlet side. The air in the second air duct 520 exchanges heat with the second heat exchanger 320 and then flows to the air outlet side.

[0101] When the first damper 410 opens the first air passage, the air in the first air passage 510 can exchange heat with the first heat exchanger 310, then flow through the first air passage into the second air passage 520, and then exchange heat with the second heat exchanger 320 before flowing to the outlet side. When the first heat exchanger 310 is cooling and the second heat exchanger 320 is heating, the air first passes through the first heat exchanger 310 for heat exchange and dehumidification, and then passes through the second heat exchanger 320 to absorb heat and regain its temperature.

[0102] In this embodiment, by connecting the first air duct 510 and the second air duct 520 to the air inlet and air outlet sides respectively, and by setting a first heat exchanger 310 in the first air duct 510 and a second heat exchanger 320 in the second air duct 520, and simultaneously setting a first air passage connecting the air outlet side of the first heat exchanger 310 and the air inlet side of the second heat exchanger 320, when the first damper 410 is closed, air passes through the first heat exchanger 310 and the second heat exchanger 320 respectively, achieving either cooling or heating. When the first damper 410 is open, air can first pass through the first heat exchanger 310 and then through the second heat exchanger 320. When the first heat exchanger 310 is cooling and the second heat exchanger 320 is heating, dehumidification and reheating can be achieved. In this way, the air duct system can not only cool and heat, but also achieve dehumidification and reheating, thus increasing the functionality of the air conditioner and meeting the needs of users.

[0103] Reference Figures 4 to 16 In some embodiments, to improve structural compactness and space utilization, the first air duct 510 and the second air duct 520 are arranged adjacent to each other, and the first air passage is opened on the common side wall of the first air duct 510 and the second air duct 520. In this embodiment, the first air duct 510 and the second air duct 520 are arranged in parallel and separated by a partition. The first air passage is opened on the partition, and the first damper 410 is movably arranged corresponding to the first air passage to open and close the first air passage. In this way, the space inside the housing 200 is fully and rationally utilized, and when the first air passage is open, because the length of the first air passage is very short, the airflow can flow very smoothly between the first air duct 510 and the second air duct.

[0104] In some embodiments, to further improve space utilization and structural compactness, the first damper 410 is positioned corresponding to the second heat exchanger 320 and is rotatably connected to a common sidewall or the second heat exchanger 320. It is worth noting that the common sidewall includes not only the sidewall itself but also plates, rods, or arms extending from it. The second heat exchanger 320 is disposed within the second air duct 520, adjacent to the first air passage, and can be connected to the common sidewall. When the first damper 410 is rotatably connected to the second heat exchanger 320, the first damper 410 can be connected to various positions, such as multiple positions along the length or width of the second heat exchanger 320, as long as they can block the first air passage. In some embodiments, to improve the utilization rate of the first damper 410, it can be rotatably connected to the side of the second heat exchanger 320 near the second air duct 520 (common sidewall). This allows the first damper 410 to selectively block any one of the first air passage, the first air duct 510, and the second air duct 520 (the air inlet side of the second heat exchanger 320). Thus, the rotation of the first damper 410 can adjust the air duct. Similarly, when the first damper 410 is rotatably mounted on the common sidewall, it is rotatably connected to the side of the first air passage, significantly improving its utilization rate. Likewise, the rotatable connection of the first damper 410 to the common sidewall allows it to selectively block any one of the first air passage, the first air duct 510, and the second air duct 520 (the air inlet or outlet side of the second heat exchanger 320).

[0105] In some embodiments, to improve the adaptability of air supply, i.e., to meet various user needs, the duct system further includes an air outlet device 700. The air outlet device 700 is disposed on the air outlet side and has a first air inlet 710, a second air inlet 720, and an air outlet 730. The first air inlet 710 is connected to the first duct 510, and the second air inlet 720 is connected to the second duct 520. By respectively arranging the first air inlet 710 and the second air inlet 720 of the air outlet device 700 within the first duct 510 and the second duct 520, the air outlet device 700 can simultaneously draw air from different ducts, so that the air flowing out of the air outlet 730 can contain air from both the first duct 510 and the second duct 520.

[0106] In order to adjust the amount of air drawn by the air outlet device 700 from the first air duct and the second air duct 520, the air duct system further includes:

[0107] The first damper 410 assembly is configured corresponding to the first air inlet 710 to adjust the air intake area of ​​the first air inlet 710; and / or,

[0108] The second damper 420 assembly is provided corresponding to the second air inlet 720 to adjust the air inlet area of ​​the second air inlet 720.

[0109] In order to adjust the total air volume of the air outlet device 700, the air duct system further includes a third damper assembly 800, which is provided corresponding to the air outlet 730 to adjust the air outlet area of ​​the air outlet 730.

[0110] The first damper assembly 410, the second damper assembly 420, and the third damper assembly 800 can have the same or different structures and forms. Several forms of damper assembly 800 are introduced below. The first damper assembly 410, the second damper assembly 420, and the third damper assembly 800 can be selected for use.

[0111] The first type of damper assembly 800, see [link / reference] Figure 13 and 14 The shape of the air inlet or outlet 730 can be circular or square. The damper assembly 800 can be a baffle 810. The baffle 810 can be positioned at the required location of the air inlet or outlet 730 to adjust the effective air passage area of ​​the air inlet and outlet 730.

[0112] The second type of damper assembly 800, see figure. Figure 15 and 16 The air inlet or outlet 730 is designed to be circular or square, with a circular design as an example. The second type of damper assembly 800 includes multiple blades 820 and a drive structure. The multiple blades 820 can be enclosed or diffused by the drive structure. When it is necessary to increase the air outlet or inlet area, the multiple blades 820 are driven to move simultaneously to the surrounding areas to increase the area enclosed by the multiple blades 820, thereby increasing the ventilation area of ​​the air outlet. When it is necessary to decrease the air outlet or inlet area, the multiple blades 820 are driven to move towards the center, thereby reducing the area enclosed by the multiple blades 820, thereby reducing the ventilation area of ​​the air outlet.

[0113] To improve the compactness and reliability of the duct system structure, the air inlet side has a common air duct 530 connecting the first air duct 510 and the second air duct 520. A fan 600 is installed within the common air duct 530, which also has an air inlet. Located on the air inlet side, the common air duct 530 allows outside air to enter through the air inlet and then flow into the first air duct 510 and the second air duct 520, where heat exchange occurs. By placing the fan 600 within the common air duct 530, airflow can be rapidly drawn into the common air duct 530 and transported to the first air duct 510 and the second air duct 520. This significantly increases the working efficiency of the fan 600 while making full and rational use of the duct space, resulting in a compact and reliable duct system structure. In addition, by placing the fan 600 on the air inlet side, it is also convenient for the operator to maintain, inspect and replace the fan 600.

[0114] Based on the aforementioned air duct, the operating states of the first heat exchanger 310 and the second heat exchanger 320 enable the air outlet 730 to deliver different forms of airflow, which will be briefly described below.

[0115] When the first heat exchanger 310 and the second heat exchanger 320 are cooling, the air exchanges heat with the first heat exchanger 310 and the second heat exchanger 320 respectively and then flows to the air outlet side for cooling. When the first heat exchanger 310 and the second heat exchanger 320 are heating, the air exchanges heat with the first heat exchanger 310 and the second heat exchanger 320 respectively and then flows to the air outlet side for heating. When the first heat exchanger 310 is heating (cooling) and the second heat exchanger 320 is cooling (heating), the ratio of cold air and hot air in the mixed air outlet can be controlled by controlling the first damper 410 assembly and the second damper 420 assembly, thereby controlling the temperature of the mixed air flowing out of the air outlet 730. When there are multiple air outlet assemblies, and they are set in different locations, the needs of different groups of people and different users can be met.

[0116] In some embodiments, to make the structure of the air duct more flexible and meet the needs of different users, a second damper 420 is provided in the second air duct 520, which can be opened and closed. The first air passage is located between the second damper 420 and the second heat exchanger 320, where it communicates with the second air duct 520. The second damper 420 is located near the air inlet side, and the side of the second damper 420 near the air inlet side has a second air passage. A shared air duct 530 sidewall can exist between the second damper 420 and the air inlet side, or it can be empty. When there is a shared air duct 530 sidewall, the second air passage is formed on the shared sidewall, and the second damper 420 can open and close the second air passage. When there is no shared sidewall, the second air passage can be the area that the second damper 420 can block. That is, when the second damper 420 extends towards the air inlet side along the shared sidewall of the first air duct 510 and the second air duct 520, the second damper 420 becomes the shared sidewall, thus extending the first air duct 510 and the second air duct 520. In this way, the second damper 420 can block any one of the first air duct 510 (the air inlet or outlet side of the first heat exchanger 310), the second air duct 520, and the second air passage. This makes the structure of the air duct more flexible, matching the position of the first damper 410 to meet different user needs.

[0117] The second damper 420 can be installed in various ways. It can be rotatably connected to the first heat exchanger 310, or rotatably connected to a common sidewall of the first heat exchanger 310. This common sidewall is the sidewall of the common air duct 530 shared by the first air duct 510 and the second air duct 520. Specific connection methods are varied, such as hinged connections, pivot connections, etc., which will not be elaborated upon here.

[0118] Depending on the positions of the first damper 410 and the second damper 420, the air duct can be transformed into various forms required for different operating conditions. Some examples are shown below:

[0119] In the first configuration, the first damper 410 has an A1 position for blocking the first air passage, and the second damper 420 has a B1 position for opening the second air passage 520, thus isolating the first air passage 510 and the second air passage 520 from each other. In this configuration, the second damper 420 blocks the second air passage, isolating the first air passage 510 and the second air passage 520 from each other. Consequently, the airflow within the first air passage 510 and the second air passage 520 does not interfere with each other and operates independently. This configuration can be used for separate cooling and separate heating; in this case, the first heat exchanger 310 and / or the second heat exchanger 320 can be selectively opened as needed.

[0120] It is worth noting that the operation of either the first heat exchanger 310 or the second heat exchanger 320 independently can be combined with various types of damper positions. For example, if the first damper is located at position A1 and the second damper is located at position B3, the second heat exchanger 320 can operate for cooling or heating. Because the second damper blocks the first air duct, the airflow from the fan ultimately passes entirely through the second air duct and the second heat exchanger. When the first damper is at position A1 and the second damper is at position B2, the first heat exchanger can be operated for cooling or heating independently.

[0121] In the second configuration, the first damper 410 has an A2 position for opening the first air passage and closing the first air duct 510, and the second damper 420 has a B2 position for closing the second air duct 520, so that the airflow passes sequentially through the first heat exchanger 310 and the second heat exchanger 320, or sequentially through the second heat exchanger 320 and the first heat exchanger 310. The following explanation uses the first heat exchanger 310 near the air inlet side as an example. In this case, to ensure smoother airflow, the airflow passes through the first heat exchanger 310 first, and then through the second heat exchanger 320. At this time, the first heat exchanger 310 can be set to heating and the second heat exchanger 320 to cooling, in which case the air is reheated and dehumidified; or, the first heat exchanger 310 can be set to cooling and the second heat exchanger 320 to heating, in which case the air is dehumidified and reheated. Under this operating condition, temperature control and dehumidification of the air can be achieved, which is beneficial to meeting user needs.

[0122] In the third configuration, the first damper 410 has position A3, which opens the first air passage and covers the air inlet or outlet side of the second heat exchanger 320. The second damper 420 also has position B3, which covers the air inlet or outlet side of the first heat exchanger 310, to reduce heat exchange between the heat exchanger and the airflow. In this configuration, very little air in the duct can exchange heat with the first and second heat exchangers 310 and 320, thus minimizing the impact of the energy generated by the first and second heat exchangers 310 and 320 on the indoor temperature. This configuration is particularly suitable for powerful defrosting, where both the first and second heat exchangers 310 and 320 can cool, while the outdoor heat exchanger 141 can heat, allowing the outdoor heat exchanger 141 to defrost quickly.

[0123] In the fourth configuration, the first damper 410 has an A1 position for blocking the first air passage, and the second damper 420 has a B3 position for covering the air inlet or outlet side of the first heat exchanger 310. The first heat exchanger 310 cools, and the second heat exchanger 320 heats. In this configuration, temperature-controlled defrosting can be performed by blocking the cooling first heat exchanger 310 to minimize the amount of airflow exchanging heat with it, while opening the second heat exchanger 320 to allow airflow to exchange heat with the heating second heat exchanger 320. Thus, the outdoor heat exchanger 141 and the second heat exchanger 320 heat simultaneously, which can both defrost and ensure that the indoor temperature is controlled within a preset range, thereby improving user comfort.

[0124] Another type of air duct system is described below. In this system, the first air duct 510 and the second air duct 520 are independent of each other. This air duct system includes:

[0125] The outer casing 200 has an air inlet side, an air outlet side, and a first air duct 510 and a second air duct 520 connecting the air inlet side and the air outlet side, wherein the first air duct 510 and the second air duct 520 are independent of each other.

[0126] A first heat exchanger 310 is installed in the first air duct 510, and a second heat exchanger 320 is installed in the second air duct 520.

[0127] An air outlet device 700 is disposed on the air outlet side. The air outlet device 700 has a first air inlet 710, a second air inlet 720 and an air outlet 730. The first air inlet 710 is connected to the first air duct 510, and the second air inlet 720 is connected to the second air duct 520.

[0128] Specifically, in this embodiment, the outer casing 200 has two independent air ducts, and each air duct is equipped with an independently controllable heat exchanger (the cooling and heating of the two heat exchangers do not interfere with each other). The air outlet device 700 can obtain air from the first air duct 510 and the second air duct 520 as needed. When one of the first heat exchanger 310 and the second heat exchanger 320 is heating and the other is cooling (taking the first heat exchanger for cooling and the second heat exchanger 320 for heating as an example), the air volume can be controlled by adjusting the ventilation area of ​​the first air inlet 710, the second air inlet 720 and the air outlet 730. The amount of cold air flowing out of the air outlet 730 can be adjusted by adjusting the air volume of the first air inlet 710, and the amount of hot air flowing out of the air outlet 730 can be adjusted by adjusting the air volume of the second air inlet 720. Thus, the air temperature flowing out of the air outlet 730 can be controlled by adjusting the ventilation area of ​​the first air inlet 710 and the second air inlet 720. In this way, the air duct system can meet the needs of different users.

[0129] In some embodiments, to ensure that the air supply to the first and second air ducts is independent and efficient, the duct system includes two fans, which are respectively positioned corresponding to the first and second air ducts, so that the first and second air ducts can supply air independently. For example, the first fan is located in the first air duct, and the second fan is located in the second air duct. In this way, the first fan provides power for the airflow in the first air duct, and the second fan provides power for the airflow in the second air duct.

[0130] The air duct system also includes:

[0131] A first damper assembly 410 is configured corresponding to the first air inlet 710 to adjust the air intake area of ​​the first air inlet 710; and / or, a second damper assembly 420 is configured corresponding to the second air inlet 720 to adjust the air intake area of ​​the second air inlet 720. The duct system further includes a third damper assembly 800, which is configured corresponding to the air outlet 730 to adjust the air outlet area of ​​the air outlet 730. The specific structures of the first damper assembly 410, the second damper assembly 420, and the third damper assembly 800 are described in the above embodiment and will not be repeated here.

[0132] The air inlet side has a common air duct 530 that connects the first air duct 510 and the second air duct 520. A fan 600 is installed in the common air duct 530, and the common air duct 530 has an air inlet.

[0133] Multiple air outlet devices 700 are connected to the air outlet side of the duct system, allowing each air outlet device 700 to draw air from the first duct 510 and the second duct 520. These multiple air outlet devices 700 can supply air to different rooms from different rooms, or they can be installed at different locations within the same room to supply air to different areas.

[0134] This invention also proposes an air conditioner, which includes an outdoor unit and an air duct system. The specific structure of the air duct system is as described in the above embodiments. Since this air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Specifically, the first heat exchanger 310 of the air duct system cools or heats, and the second heat exchanger 320 of the air duct system cools or heats.

[0135] The following describes an air conditioning system that can simultaneously heat and cool the first heat exchanger 310 and the second heat exchanger 320, or one heats and the other cools.

[0136] An air conditioner includes an outdoor unit and an indoor unit, the outdoor unit including a compressor 110 and an outdoor heat exchanger 141, and the indoor unit including a first heat exchanger 310 and a dehumidification throttling device.

[0137] The air conditioner further includes: a discharge pipe 111 connected to the discharge side of the compressor 110, a low-pressure suction pipe 113 connected to the low-pressure suction side of the compressor 110, and the discharge pipe 111, the outdoor heat exchanger 141, the dehumidification throttling device, the liquid-side piping 140 of the first heat exchanger 310, and the gas-side piping 160 connecting the first heat exchanger 310 and the low-pressure suction pipe 113, thereby forming a dehumidification circuit;

[0138] The indoor unit also includes a second heat exchanger 320, a reheat throttling regulating device, and a heat circulation device for sending the heat or cold energy of the indoor unit into the room.

[0139] The air conditioner also includes a high- and low-pressure piping 150 and a branch pipe 112 branching off from the discharge pipe 111. The high- and low-pressure piping 150 connects the first intersection point of the liquid-side piping 140, the reheat throttling regulating device, the second heat exchanger 320 and the branch pipe 112 in sequence to form a reheat circuit. The first intersection point is located between the dehumidification throttling regulating device and the outdoor heat exchanger 141.

[0140] The air conditioner also includes a connecting pipe 114, one end of which is connected to the high and low pressure piping 150, and the other end is connected to the gas side piping 160, or to the low pressure suction pipe 113.

[0141] The three-way valve has three ports that are respectively connected to the high and low pressure piping 150, the branch pipe 112, and the connecting pipe 114, so that the high and low pressure piping 150 is connected to the connecting pipe 114 or to the branch pipe 112.

[0142] The three-way valve can be replaced by two two-way valves (first control valve and second control valve). Specifically, a two-way valve (first control valve 170) is installed between the high and low pressure piping 150 and the branch pipe 112, and a two-way valve (second control valve 180) is installed between the high and low pressure piping 150 and the connecting pipe 114. In this way, the conduction between the high and low pressure piping 150 and the branch pipe 112 is independent of the conduction between the high and low pressure piping 150 and the connecting pipe 114.

[0143] To enable more configurations of the first heat exchanger 310 and the second heat exchanger 320, the outdoor unit further includes a first switcher 131, which can switch between a first switching state and a second switching state.

[0144] In the first switching state, the first switch 131 connects the liquid-side piping 140 to the suction pipe 113 and connects the gas-side piping 160 to the discharge pipe 111.

[0145] In the second switching state, the first switch 131 connects the liquid-side piping 140 to the discharge pipe 111 and the gas-side piping 160 to the suction pipe 113. This allows the operating state (heating or cooling) of the first heat exchanger 310 and the second heat exchanger 320 to be adjusted as needed.

[0146] It is worth noting that the fluid providing the cold or heat source for the first heat exchanger can be a low-temperature or high-temperature fluid, such as a high-temperature gas or a high-temperature liquid, in addition to a refrigerant; similarly, the fluid providing the cold or heat source for the second heat exchanger can be a low-temperature or high-temperature fluid, such as a high-temperature gas or a high-temperature liquid, in addition to a refrigerant.

[0147] Regarding the air conditioner's operating modes, cooling mode:

[0148] High-temperature, high-pressure refrigerant is discharged from exhaust pipe 111, passing sequentially through first switcher 131, liquid-side piping 140, and outdoor heat exchanger, before entering the first and second heat exchangers for refrigeration. A portion flows out of the second heat exchanger, through gas-side piping 160 and the first switcher 131 (which may be absent in some embodiments), and into the gas-liquid separator; the other portion flows out of the first heat exchanger, through high- and low-pressure piping 150, and into connecting pipe 114. When connecting pipe 114 is connected to the low-pressure suction pipe, the refrigerant enters the gas-liquid separator through the low-pressure suction pipe 113. When connecting pipe 114 is connected to the gas-side piping 160, the refrigerant flows through connecting pipe 114 into the gas-side piping 160, and then into the gas-liquid separator. During this process, first control valve 170 is closed, and second control valve 180 is open. The three-way valve opens the high- and low-pressure piping connection and closes the high- and low-pressure piping and branch pipes.

[0149] Heating mode:

[0150] High-temperature, high-pressure refrigerant is discharged from exhaust pipe 111. A portion passes sequentially through the first switcher 131 (which may be omitted in some embodiments), gas-side piping 160, and then enters the second heat exchanger for heating. After exiting the second heat exchanger, it flows into the liquid-side piping 140. The other portion passes sequentially through the branch pipe 112 and high / low pressure piping 150 into the reheat heat exchanger for heating. After exiting the reheat heat exchanger, it flows into the liquid-side piping 140, passes through the economizer, the outdoor heat exchanger, and the first switcher 131, and then flows into the gas-liquid separator. During this process, the first control valve 170 opens, and the second control valve 180 closes. The three-way valve closes the high / low pressure piping connection pipe and connects the high / low pressure piping to the branch pipe.

[0151] Constant temperature dehumidification mode:

[0152] High-temperature, high-pressure refrigerant is discharged from exhaust pipe 111. A portion passes sequentially through the first switcher 131 (which may be absent in some embodiments), liquid-side piping 140, outdoor heat exchanger, and economizer, before entering the second heat exchanger for cooling. It then flows through gas-side piping 160 and the first switcher 131 into the gas-liquid separator. The remaining portion passes sequentially through branch pipe 112 and high / low pressure piping 150 into the reheat heat exchanger for heating, before flowing into the second heat exchanger for cooling. During this process, the first control valve 170 opens, and the second control valve 180 closes. The three-way valve closes the high / low pressure piping connection and connects the high / low pressure piping to the branch pipe.

[0153] Regarding the above-mentioned duct system, this application proposes a control method for the duct system to meet the air supply needs of different users. The control method for the duct system includes:

[0154] Get the mode command;

[0155] Specifically, in this embodiment, there are multiple ways to obtain mode commands. They can be obtained from commands sent by external terminals, such as mobile phones or remote controls; they can also be obtained from other household appliances, such as electric fans or air purifiers; they can also be obtained by detecting their own operating parameters or detecting external environmental parameters, such as indoor temperature; and of course, they can also be obtained from the cloud.

[0156] Mode commands can include cooling, heating, dehumidification, temperature-controlled dehumidification, defrosting, and sensorless defrosting, etc.

[0157] The operating states of the first heat exchanger 310 and the second heat exchanger 320 are adjusted according to mode commands; the operation of the compressor 110, fan 600, first heat exchanger 310 and second heat exchanger 320 are controlled according to different mode commands. For example, when heating, the first heat exchanger 310 and / or the second heat exchanger 320 heat; when cooling, the first heat exchanger 310 and / or the second heat exchanger 320 cool; when temperature control and dehumidification are in operation, the first heat exchanger 310 cools and the second heat exchanger 320 heats, etc.

[0158] The positions of the first damper 410 and the second damper 420 are adjusted according to the mode instructions. In different operating modes, the first damper 410 and the second damper 420 correspond to different positions to meet the air duct requirements under different operating conditions and modes.

[0159] In this embodiment, by setting a first damper 410 and a second damper 420, and making the positions of the first damper 410 and the second damper 420 adjustable, different forms of air ducts can be realized, thereby meeting the needs of air ducts under different modes. In this way, the adaptability of the air duct system is greatly improved, which is conducive to meeting people's different needs.

[0160] The following sections explain the requirements for different work modes:

[0161] The mode command includes a cooling mode command. The steps of adjusting the operating status of the first heat exchanger 310 and the second heat exchanger 320 according to the mode command, and adjusting the positions of the first damper 410 and the second damper 420 according to the mode command, include:

[0162] Adjust the first heat exchanger 310 and / or the second heat exchanger 320 to cooling mode according to the cooling mode command;

[0163] Adjust the first damper 410 to position A1, which blocks the first air passage, and adjust the second damper 420 to position B1, which opens the second air passage 520, so that the first air passage 510 and the second air passage 520 are isolated from each other.

[0164] When the user requires cooling, one or both of the first heat exchanger 310 and the second heat exchanger 320 will cool. The first damper 410 will be adjusted to block the first air passage, and the second damper 420 will duct the second air passage, so that the first air passage 510 and the second air passage 520 are independent of each other. In this way, the airflow can pass through the first air passage 510 and the second air passage 520 very smoothly, without the phenomenon of cross-flow, so that the airflow can exchange heat and transport efficiently.

[0165] It is worth noting that when the first air duct 510 and the second air duct 520 are independent of each other, and there are multiple air supply devices with different customer needs, the first heat exchanger 310 can be adjusted to cooling and the second heat exchanger 320 to heating. In this way, the air supply temperature at the outlet 730 of the air supply device can be adjusted by controlling the air intake in the first air duct 510 and the second air duct 520, thereby meeting the needs of different users. Simultaneously, this method can also achieve temperature control and dehumidification.

[0166] The mode commands include dehumidification and reheat mode commands. The steps of adjusting the operating states of the first heat exchanger 310 and the second heat exchanger 320 according to the mode commands, and adjusting the positions of the first damper 410 and the second damper 420 according to the mode commands, include:

[0167] According to the dehumidification and reheat mode command, the first heat exchanger 310 is adjusted to cooling and the second heat exchanger 320 is adjusted to heating.

[0168] Adjust the first damper 410 to position A2, which opens the first air passage and closes the first air duct 510, and adjust the second damper 420 to position B2, which closes the second air duct 520, so that the airflow passes through the first heat exchanger 310 and the second heat exchanger 320 in sequence.

[0169] When the user needs temperature control and dehumidification, the first damper 410 is adjusted to close the first air duct 510, and the second damper 420 is adjusted to close the second air duct 520. Thus, the airflow enters the common air duct 530 through the air inlet, first passing through the first heat exchanger 310 for dehumidification. After exchanging heat with the first heat exchanger 310, the airflow enters the second air duct 520 through the first air passage. Under the action of the fan 600, the airflow exchanges heat with the second heat exchanger 320 in the second air duct 520, adjusting the air temperature to the required temperature. In this way, the air undergoes a process of dehumidification and reheating by first exchanging heat with the first heat exchanger 310 and then with the second heat exchanger 320.

[0170] When a user needs to defrost the outdoor heat exchanger 141, there are two scenarios: one is normal high-power defrosting, in which the first heat exchanger 310 and the second heat exchanger 320 are both cooling, and the outdoor heat exchanger 141 is heating; the other is non-intrusive defrosting, in which the first heat exchanger 310 is cooling, the second heat exchanger 320 is heating, and the outdoor heat exchanger 141 is heating.

[0171] For normal high-power defrosting, the mode commands include defrosting mode commands. The steps of adjusting the working state of the first heat exchanger 310 and the second heat exchanger 320 according to the mode commands, and adjusting the positions of the first damper 410 and the second damper 420 according to the mode commands, include:

[0172] According to the defrost mode command, the first heat exchanger 310 and the second heat exchanger 320 are adjusted to cooling mode;

[0173] Adjust the first damper 410 to position A3, which opens the first air passage and covers the air inlet or outlet side of the second heat exchanger 320, and adjust the second damper 420 to position B3, which covers the air inlet or outlet side of the first heat exchanger 310.

[0174] By setting both the first heat exchanger 310 and the second heat exchanger 320 to cooling mode, the outdoor heat exchanger 141 can be powered to heat strongly, thus quickly defrosting the outdoor heat exchanger 141. At this time, to reduce the amount of cold air, the air inlet or outlet side of the first heat exchanger 310 is blocked by the second damper 420; the air inlet or outlet side of the second heat exchanger 320 is blocked by the first damper 410, preventing air from exchanging heat with the first and second heat exchangers 310 and 320, thereby minimizing the formation of cold air and its impact on the indoor temperature. An example is given where the first damper 410 blocks the air inlet side of the second heat exchanger 320, and the second damper 420 blocks the air inlet side of the first heat exchanger 310.

[0175] The non-intrusive defrosting mode includes a non-intrusive defrosting mode command. The steps of adjusting the operating status of the first heat exchanger 310 and the second heat exchanger 320 according to the mode command, and adjusting the positions of the first damper 410 and the second damper 420 according to the mode command, include:

[0176] According to the non-sensory defrosting mode command, the first heat exchanger 310 is adjusted to cooling and the second heat exchanger 320 is adjusted to heating.

[0177] Adjust the first damper 410 to position A1, which blocks the first air passage, and adjust the second damper 420 to position B3, which covers the air inlet or outlet side of the first heat exchanger 310.

[0178] In this embodiment, the first heat exchanger 310 cools, while the second heat exchanger 320 and the outdoor heat exchanger 141 both heat. At this time, the outdoor unit is defrosting. Simultaneously, by adjusting the air duct, air passes through the second heat exchanger 320 instead of the first heat exchanger 310, allowing the indoor temperature to continue to rise. Thus, defrosting of the outdoor unit is achieved without the user's perception. During this process, the second air damper 420 blocks the air inlet or outlet side of the first heat exchanger 310, and the first air damper 410 blocks the first airflow channel, allowing air to pass only through the second air duct 520 and exchange heat with the second heat exchanger 320. This prevents the air from cooling down through heat exchange with the first heat exchanger 310, while allowing the air to heat up through heat exchange with the second heat exchanger 320, thereby achieving imperceptible defrosting.

[0179] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air duct system, characterized by The application relates to a wind channel system, comprising: a housing having an air inlet side, an air outlet side, a first air channel and a second air channel; a first heat exchanger arranged in the first air channel, and a second heat exchanger arranged in the second air channel; the first air channel and the second air channel are connected through a first air passage, one end of the first air passage is connected with an air outlet side of the first heat exchanger, and the other end is connected with an air inlet side of the second heat exchanger; a first air door arranged corresponding to the first air passage to open or close the first air passage; the wind channel system further comprises an air outlet device arranged at the air outlet side, the air outlet device has a first air inlet, a second air inlet and an air outlet, the first air inlet is connected with the first air channel, and the second air inlet is connected with the second air channel; the wind channel system further comprises: a first air door assembly arranged corresponding to the first air inlet to adjust an air inlet area of the first air inlet; and / or, a second air door assembly arranged corresponding to the second air inlet to adjust an air inlet area of the second air inlet; the wind channel system further comprises a third air door assembly arranged corresponding to the air outlet to adjust an air outlet area of the air outlet; any air door assembly comprises a plurality of blades and a driving structure, the plurality of blades are closed or diffused by driving of the driving structure; the wind channel system comprises a plurality of air outlet devices, the first air inlet of each air outlet device is connected with the first air channel, and the second air inlet is connected with the second air channel; the plurality of air outlet devices are respectively connected with the air outlet side of the wind channel system, and each air outlet device can take air from the first air channel and the second air channel.

2. The air duct system of claim 1, wherein, The first air channel and the second air channel are arranged adjacently, and the first air passage is arranged on a shared side wall of the first air channel and the second air channel.

3. The air duct system of claim 2, wherein, The first air door is arranged corresponding to a position of the second heat exchanger and is rotationally connected with the shared side wall or the second heat exchanger.

4. A duct system as claimed in any one of claims 1 to 3, wherein, The second air channel is provided with a second air door capable of opening and closing the second air channel, and a position where the first air passage is connected with the second air channel is located between the second air door and the second heat exchanger.

5. The air duct system of claim 4, wherein, The second air door is rotationally connected with the first heat exchanger or a shared side wall corresponding to the first heat exchanger, wherein the shared side wall is a shared air channel side wall of the first air channel and the second air channel.

6. The air duct system of claim 4, wherein, The first air door has a first position to block the first air passage, and the second air door has a first position to open the second air channel, so that the first air channel and the second air channel are isolated from each other.

7. The air duct system of claim 4, wherein, The first air door has a second position to open the first air passage and close the first air channel, and the second air door has a second position to close the second air channel, so that air flows through the first heat exchanger and the second heat exchanger in sequence or through the second heat exchanger and the first heat exchanger in sequence.

8. The air duct system of claim 4, wherein, The first air door has a third position to open the first air passage and cover an air inlet side or an air outlet side of the second heat exchanger, and the second air door has a third position to cover an air inlet side or an air outlet side of the first heat exchanger, so as to reduce the air flow through the first heat exchanger.

9. The air duct system of claim 4, wherein, The first damper is located at the first station, and the second damper is located at the third station, and the first heat exchanger is refrigerated and / or the second heat exchanger is heated.

10. The air duct system of claim 1, wherein, The air inlet side has a shared air duct communicating with the first air duct and the second air duct, and a fan is arranged in the shared air duct, and the shared air duct has an air inlet.

11. An air duct system characterized by, The air conditioner comprises: An outer shell having an air inlet side, an air outlet side, a first air duct and a second air duct communicating with the air inlet side and the air outlet side, and the first air duct and the second air duct are independent of each other; A first heat exchanger is arranged in the first air duct, and a second heat exchanger is arranged in the second air duct; An air outlet device is arranged on the air outlet side, and the air outlet device has a first air inlet, a second air inlet and an air outlet, the first air inlet communicates with the first air duct, and the second air inlet communicates with the second air duct; The air duct system further comprises a third damper assembly corresponding to the air outlet to adjust the air outlet area of the air outlet; The air duct system further comprises: A first damper assembly corresponding to the first air inlet to adjust the air inlet area of the first air inlet; And / or, A second damper assembly corresponding to the second air inlet to adjust the air inlet area of the second air inlet; Any of the damper assemblies comprises a plurality of blades and a driving structure, and the plurality of blades are closed or diffused by driving of the driving structure; The air duct system comprises a plurality of air outlet devices, the first air inlet of each air outlet device communicates with the first air duct, and the second air inlet communicates with the second air duct; a plurality of air outlet devices respectively communicate with the air outlet side of the air duct system, and each air outlet device can take air from the first air duct and the second air duct.

12. The air duct system of claim 11, wherein, The air inlet side has a shared air duct communicating with the first air duct and the second air duct, and a fan is arranged in the shared air duct, and the shared air duct has an air inlet.

13. The air duct system of claim 11, wherein, The air duct system comprises two fans, and the two fans are arranged corresponding to the first air duct and the second air duct respectively, so that the first air duct and the second air duct can independently supply air.

14. An air conditioner characterized by comprising: The air conditioner comprises an outdoor unit and an air duct system according to any one of claims 1 to 10, or The air conditioner comprises an air duct system according to any one of claims 11 to 13; The air duct system comprises a first heat exchanger for refrigeration or heating, and a second heat exchanger for refrigeration or heating.

15. The air conditioner of claim 14, wherein The air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compression mechanism and an outdoor heat exchanger, and the indoor unit comprises a first heat exchanger and a dehumidification throttling adjustment device; The air conditioner further comprises: an exhaust pipe connected to the exhaust side of the compression mechanism, a low-pressure suction pipe connected to the low-pressure suction side of the compression mechanism, a liquid-side pipe sequentially connected to the exhaust pipe, the outdoor heat exchanger, the dehumidification throttling adjustment device and the first heat exchanger, and a gas-side pipe connected between the first heat exchanger and the low-pressure suction pipe, thereby forming a dehumidification circuit; The indoor unit further comprises a second heat exchanger, a reheating throttling adjustment device and a heat circulation device for sending heat or cold of the indoor unit into a room; The air conditioner further comprises a high-low pressure pipe and a branch pipe branched from the discharge pipe, the high-low pressure pipe sequentially connects the first intersection of the liquid side pipe, the reheating throttling adjusting device, the second heat exchanger and the branch pipe, thereby forming a reheating circuit, wherein the first intersection is located between the dehumidification throttling adjusting device and the outdoor heat exchanger; The air conditioner further comprises a communication pipe, one end of the communication pipe communicates with the high-low pressure pipe, and the other end communicates with the gas side pipe or the low pressure suction pipe; The branch pipe is provided with a first control valve, and the communication pipe is provided with a second control valve, so as to make the high-low pressure pipe communicate with the communication pipe or the branch pipe.

16. The air conditioner of claim 15, wherein The outdoor unit further comprises a first switcher, which can be switched between a first switch state and a second switch state, In the first switch state, the first switcher makes the liquid side pipe communicate with the suction pipe and makes the gas side pipe communicate with the discharge pipe, In the second switch state, the first switcher makes the liquid side pipe communicate with the discharge pipe and makes the gas side pipe communicate with the suction pipe.

17. A control method of an air duct system, characterized by, The air duct system is as claimed in any one of claims 1 to 10, and a control method of the air duct system comprises: acquiring a mode instruction; adjusting the working states of the first heat exchanger and the second heat exchanger according to the mode instruction; adjusting the working positions of the first damper and the second damper according to the mode instruction.

18. The control method of the air duct system according to claim 17, wherein, The mode instruction comprises a refrigeration mode instruction, and the steps of adjusting the working states of the first heat exchanger and the second heat exchanger according to the mode instruction and adjusting the working positions of the first damper and the second damper according to the mode instruction comprise: adjusting the first heat exchanger and the second heat exchanger to refrigerate according to the refrigeration mode instruction; adjusting the first damper to the first working position of blocking the first air passage and adjusting the second damper to the first position of opening the second air duct, so as to isolate the first air duct and the second air duct from each other.

19. The control method of the air duct system according to claim 17, wherein, The mode instruction comprises a dehumidification and reheating mode instruction, and the steps of adjusting the working states of the first heat exchanger and the second heat exchanger according to the mode instruction and adjusting the working positions of the first damper and the second damper according to the mode instruction comprise: adjusting the first heat exchanger to refrigerate and adjusting the second heat exchanger to heat according to the dehumidification and reheating mode instruction; adjusting the first damper to the second working position of opening the first air passage and closing the first air duct and adjusting the second damper to the second position of closing the second air duct, so as to make the air flow pass through the first heat exchanger and the second heat exchanger in sequence.

20. The control method of the air duct system according to claim 18, wherein, The mode instruction comprises a defrosting mode instruction, and the steps of adjusting the working states of the first heat exchanger and the second heat exchanger according to the mode instruction and adjusting the working positions of the first damper and the second damper according to the mode instruction comprise: adjusting the first heat exchanger and the second heat exchanger to refrigerate according to the defrosting mode instruction; adjusting the first damper to the third working position of opening the first air passage and covering the air inlet side or the air outlet side of the second heat exchanger and adjusting the second damper to the third position of covering the air inlet side or the air outlet side of the first heat exchanger.

21. The control method of the air duct system according to claim 17, wherein, The mode instruction includes a non-inductive defrosting mode instruction, and the step of adjusting the working state of the first heat exchanger and the second heat exchanger according to the mode instruction includes: adjusting the first heat exchanger to refrigeration and adjusting the second heat exchanger to heating according to the non-inductive defrosting mode instruction; adjusting the first damper to the first working position of blocking the first air passage and adjusting the second damper to the third position of covering the air inlet side or the air outlet side of the first heat exchanger.

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