Duct type air conditioner

Abstract

The utility model discloses an air duct type air conditioner which comprises a machine shell. A heat exchanger; the air duct piece is arranged opposite to the heat exchanger; the fan is arranged in the air duct piece; the heat exchanger comprises a first plate body and a second plate body, wherein a first refrigerant pipeline is arranged on the first plate body; the upper end of the second plate body is in lap joint with the lower end of the first plate body, and a second refrigerant pipeline is arranged on the second plate body; the upper end of the third plate body is in lap joint with the lower end of the second plate body, and a third refrigerant pipeline is arranged on the third plate body; an inlet of the first refrigerant pipeline is adjacent to an outlet of the second refrigerant pipeline; or the outlet of the first refrigerant pipeline is adjacent to the inlet of the second refrigerant pipeline. The flow directions of refrigerants at the lap joint of the first plate body and the second plate body are opposite, airflow with the large temperature difference flowing out of the first plate body and the second plate body can be mixed in advance, the air dew point is reduced, and the condensation risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a ducted air conditioner. Background Technology

[0002] Cross-flow fan ducted air conditioners differ from traditional centrifugal fan ducted air conditioners. Centrifugal fans have a larger structural size, resulting in a larger overall ducted air conditioner enclosure. Additionally, the airflow through the heat exchangers between centrifugal fans is smaller, leading to lower heat exchanger utilization in centrifugal fan ducted air conditioners. Cross-flow fan ducted air conditioners, on the other hand, are characterized by low noise and compact size.

[0003] Air conditioner heat exchangers have different heat exchange efficiencies depending on the number of rows. The more rows a heat exchanger has, the higher its cost-to-heat exchange capacity ratio. Therefore, current air conditioner designs aim to minimize the number of rows while still meeting the requirements for frontal area.

[0004] However, single-row heat exchangers, especially three-fold heat exchangers, have high heat exchange efficiency due to their single flow path. This results in high superheat in the flow path near the outlet section under certain operating conditions. Consequently, the outlet air temperature and humidity of the same flow path are different, and the convergence of hot and cold air leads to condensation, causing the air conditioner to "blow water". Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a duct air conditioner in which the refrigerant flows in opposite directions at the overlap of the first and second plates. The airflow with a large temperature difference from the first and second plates can be mixed in advance, thereby reducing the air dew point and minimizing the risk of condensation.

[0006] A ducted air conditioner according to a first aspect of the present invention includes: a housing having an air inlet and an air outlet formed on opposite sides; a heat exchanger disposed within the housing; an air duct component disposed within the housing, adjacent to the air outlet relative to the heat exchanger, and disposed opposite to the heat exchanger; and a fan disposed within the air duct component, the fan driving air to enter the housing from the air inlet, and the air passing through the heat exchanger, exchanging heat with the heat exchanger, and then flowing to the air duct component. The air then enters the room through the air outlet; the heat exchanger includes: a first plate, on which a first refrigerant pipe is provided; a second plate, the upper end of which overlaps with the lower end of the first plate, on which a second refrigerant pipe is provided; and a third plate, the upper end of which overlaps with the lower end of the second plate, on which a third refrigerant pipe is provided; wherein, the inlet of the first refrigerant pipe is adjacent to the outlet of the second refrigerant pipe; or, the outlet of the first refrigerant pipe is adjacent to the inlet of the second refrigerant pipe.

[0007] When the inlet and outlet of the first and second refrigerant pipes are not adjacent, the refrigerant temperature at the overlap of the first and second plates is lower, resulting in a larger temperature difference in the airflow flowing out of the overlap. This alternation of hot and cold airflows leads to condensation and water blowing. According to the ducted air conditioner of this embodiment, the inlet and outlet of the first and second refrigerant pipes are adjacent, allowing the airflows with a large temperature difference from the first and second plates to mix in advance, lowering the air dew point and reducing the risk of condensation.

[0008] According to some embodiments of this utility model, the third refrigerant pipeline includes: a first section, the inlet of which is located at the upper end of the third plate; and a second section, the outlet of which is connected to the inlet of which is adjacent to the outlet of which is located below. Specifically, during cooling, the airflow temperature at the inlet of the first section is lower, while the airflow temperature at the outlet of the second section is higher. The proximity of the inlet of the first section to the outlet of the second section allows for pre-mixing of cold and hot air, reducing the risk of condensation.

[0009] According to some embodiments of this utility model, the inlet of the third refrigerant pipe is located at the upper end of the third plate, and the outlet of the third refrigerant pipe is located at the lower end of the third plate. This arrangement allows the cooler airflow above the third plate to mix with the warmer airflow below the third plate, reducing the risk of condensation on the fan and preventing water blowing.

[0010] According to some embodiments of this utility model, the ducted air conditioner further includes: a first mixing element, which is disposed opposite to the outlet of the third refrigerant pipe and connected to the casing. By providing the first mixing element at the outlet of the third refrigerant pipe, the hot air at the lower end of the third plate is directed to the upper part of the third plate, so that the lower temperature airflow above the third plate mixes with the higher temperature airflow below the third plate, reducing the risk of condensation on the fan and avoiding water blowing.

[0011] According to some embodiments of this utility model, the first mixing element and the third plate are spaced apart, and the gap between the first mixing element and the third plate is H, where H satisfies the relationship: 5 mm ≤ H ≤ 15 mm. This ensures sufficient gap between the outlets of the first mixing element and the third plate to allow airflow to pass through, guaranteeing unobstructed airflow from the third plate.

[0012] According to some embodiments of this utility model, the ducted air conditioner further includes: a second mixing element, which is connected to the casing and located on the leeward side of the heat exchanger, at the overlap of the second plate and the third plate. The second mixing element can mix the airflow below the second plate with the airflow above the third plate, preventing excessive temperature differences in the airflow at different locations within the heat exchanger, which could lead to condensation on the fan.

[0013] According to some embodiments of this utility model, the first refrigerant pipeline includes: a first inlet located at the upper end of the first plate; and a first outlet located at the lower end of the first plate. The second refrigerant pipeline includes: a second inlet located at the upper end of the second plate; and a second outlet located at the lower end of the second plate. During cooling, the refrigerant temperature at the first inlet is lower, resulting in a lower airflow temperature flowing out from the top of the first plate. Similarly, the refrigerant temperature at the second outlet is lower, resulting in a lower airflow temperature flowing out from the top of the second plate. Since the upper end of the second plate overlaps with the lower end of the first plate, the higher-temperature airflow flowing out from the bottom of the first plate mixes with the lower-temperature airflow flowing out from the top of the second plate beforehand, lowering the air dew point and reducing the risk of condensation.

[0014] According to some embodiments of this utility model, the first refrigerant pipeline includes: a first inlet located at the lower end of the first plate; and a first outlet located at the upper end of the first plate. The second refrigerant pipeline includes: a second inlet located at the lower end of the second plate; and a second outlet located at the upper end of the second plate. During cooling, the refrigerant temperature at the first inlet is lower, resulting in a lower airflow temperature flowing out from below the first plate; the refrigerant temperature at the second outlet is higher, meaning a higher airflow temperature flowing out from above the second plate. Since the upper end of the second plate overlaps with the lower end of the first plate, the lower-temperature airflow flowing out from below the first plate mixes with the higher-temperature airflow flowing out from above the second plate in advance, lowering the air dew point and reducing the risk of condensation.

[0015] According to some embodiments of this utility model, the heat exchanger includes multiple heat exchange tubes arranged in a single row. The single-row arrangement of the heat exchange tubes results in a smaller volume occupied by the heat exchanger, higher heat exchange efficiency, and ensures the heat exchange effect of the heat exchanger.

[0016] A ducted air conditioner according to a second aspect embodiment of the present invention includes: a housing having an air inlet and an air outlet formed on opposite sides; a heat exchanger disposed within the housing and adjacent to the air inlet; an air duct component disposed opposite to the heat exchanger, within the housing and adjacent to the air outlet; and a fan disposed within the air duct component, the fan driving air to enter the housing from the air inlet, and the air passing through the heat exchanger, exchanging heat with the heat exchanger, flowing to the air duct component, and then entering the room through the air outlet; the heat exchanger includes... The system comprises: a first plate with a first refrigerant pipe; a second plate, the upper end of which overlaps with the lower end of the first plate, and a second refrigerant pipe thereon; and a third plate, the upper end of which overlaps with the lower end of the second plate, and a third refrigerant pipe thereon. The inlet of the first refrigerant pipe is located at the lower end of the first plate, and the outlet of the second refrigerant pipe is located at the upper end of the second plate; or, the outlet of the first refrigerant pipe is located at the lower end of the first plate, and the inlet of the second refrigerant pipe is located at the upper end of the second plate. When the inlet of the first refrigerant pipe and the outlet of the second refrigerant pipe are adjacent, or vice versa, during cooling, the higher-temperature airflow from the overlap of the first and second plates mixes with the lower-temperature airflow, thus mixing the cold and hot air in advance and reducing the risk of condensation.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the internal structure of the duct machine according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram showing that the inlet of the first plate and the outlet of the second plate are adjacent.

[0021] Figure 3 A schematic diagram showing that the outlet of the first plate is adjacent to the inlet of the second plate;

[0022] Figure 4 This is a schematic diagram showing the installation of the first mixing element when the inlet of the first plate and the outlet of the second plate are adjacent.

[0023] Figure 5This is a schematic diagram showing the installation of the first mixing element when the outlet of the first plate is adjacent to the inlet of the second plate;

[0024] Figure 6 The refrigerant flow path of the heat exchanger according to an embodiment of this utility model. Figure 1 ;

[0025] Figure 7 The refrigerant flow path of the heat exchanger according to an embodiment of this utility model. Figure 2 ;

[0026] Figure 8 This is a schematic diagram showing that the inlet of the first plate is adjacent to the outlet of the second plate, and the inlet and outlet of the third plate are close to each other.

[0027] Figure 9 This is a schematic diagram showing that the outlet of the first plate is adjacent to the inlet of the second plate, and the inlet and outlet of the third plate are close to each other;

[0028] Figure 10 This is a schematic diagram showing the inlet of the first plate and the outlet of the second plate adjacent to each other, with the second mixing element placed there.

[0029] Figure 11 This is a schematic diagram showing the outlet of the first plate adjacent to the inlet of the second plate, with the second mixing element placed there.

[0030] Figure label:

[0031] 100. Ductless air conditioner;

[0032] 11. Housing; 12. Air duct components; 13. Fan;

[0033] 20. Heat exchanger; 21. First plate; 211. First inlet; 212. First outlet; 22. Second plate; 221. Second inlet; 222. Second outlet; 23. Third plate; 231. First section; 232. Second section; 233. Third inlet; 234. Third outlet; 235. Fourth inlet; 236. Fourth outlet;

[0034] 31. First mixing element; 32. Second mixing element. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0036] The following is for reference. Figures 1-11 Description of the duct air conditioner 100 according to an embodiment of the present utility model.

[0037] in, Figures 1-11 The vertical direction in the text refers to the height of the duct unit.

[0038] The duct air conditioner 100 according to an embodiment of the present invention may include a housing 11, on which air inlets and air outlets are formed on opposite sides. The housing 11 can form air inlets and air outlets, and can form a receiving space inside the housing 11 to facilitate fixing the components of the duct air conditioner 100 and to protect the components of the duct air conditioner 100.

[0039] Combination Figure 1 As shown, the ducted air conditioner 100 may include a heat exchanger 20, which is disposed inside the casing 11. Indoor or outdoor air can flow into the casing 11 through the air inlet, exchange heat with the heat exchanger 20 to form a heat exchange airflow, and then be discharged into the room through the air outlet. Thus, the heat exchanger 20 can be used to heat or cool the airflow to achieve heating or cooling of the indoor air.

[0040] Furthermore, the ducted air conditioner 100 may include an air duct component 12, which may be disposed inside the housing 11. The air duct component 12 is disposed near the air outlet relative to the heat exchanger 20. The air duct component 12 can guide the air flowing into the housing 11 so that the airflow can flow more evenly and orderly, and so that the air flowing into the housing 11 can flow through the heat exchanger 20 and exchange heat with the heat exchanger 20, thereby improving the heat exchange efficiency.

[0041] The ducted air conditioner 100 may include a fan 13, which is disposed within a duct component 12. The duct component 12 is disposed opposite to a heat exchanger 20 and is located within a casing 11. The fan 13 is positioned near the air outlet. The fan 13 drives air to enter the casing 11 from the air inlet. The air passes through the heat exchanger 20, exchanges heat with the heat exchanger 20, flows to the duct component 12, and then enters the room through the air outlet. The fan 13 can operate to drive airflow, thereby increasing the airflow speed and improving the heat exchange efficiency between the air and the heat exchanger 20, thus improving the cooling or heating efficiency of the ducted air conditioner 100.

[0042] The heat exchanger 20 may include a water collection tray. When the air conditioner is cooling, the surface of the heat exchanger 20 is at a low temperature, and the moisture in the air will condense on the heat exchange fins to form condensate. The condensate is collected through the water collection tray below the indoor heat exchanger 20 and then discharged through the drain pipe to prevent water droplets from entering the room.

[0043] Combination Figures 1-7 As shown, the heat exchanger 20 is a three-fold heat exchanger 20, namely, a first plate 21, a second plate 22 and a third plate 23. The first plate 21, the second plate 22 and the third plate 23 all include heat exchange fins stacked together and heat exchange tubes passing through the heat exchange fins.

[0044] Heat exchange fins are typically made of aluminum and are used to increase the heat exchange area and improve heat exchange efficiency. The heat exchange fins are closely arranged around the heat exchange tubes, and when indoor air flows over the heat exchange fins, the heat in the air is exchanged with the fins.

[0045] The refrigerant flows through heat exchange tubes and undergoes a phase change within them, either from liquid to gas or vice versa. These heat exchange tubes are typically made of copper, which has excellent thermal conductivity and efficiently transfers heat between the refrigerant and the air. The piping is usually designed in a U-shape or serpentine pattern to increase the refrigerant's flow path and thus its contact time with the air.

[0046] like Figures 2-7 As shown, the heat exchanger 20 may include: a first plate 21, on which a first refrigerant pipeline is provided. Specifically, the first plate 21 is inclined upwards and inclined toward the air duct component 12. Multiple heat exchange tubes are provided inside the first plate 21, and the multiple heat exchange tubes are interconnected to form the first refrigerant pipeline; and the multiple heat exchange tubes are evenly distributed inside the first plate 21 to ensure the heat exchange effect of the first plate 21.

[0047] Multiple heat exchange tubes within the first plate 21 are arranged in a single row along the width of the first plate 21. The refrigerant enters the first refrigerant pipe and flows within it to exchange heat with the airflow passing through the first plate 21.

[0048] Furthermore, the heat exchanger 20 may include a second plate 22, the upper end of which overlaps with the lower end of the first plate 21, and a second refrigerant pipe is provided on the second plate 22. Specifically, the upper end of the second plate 22 overlaps with the lower end of the first plate 21, the angle between the second plate 22 and the first plate 21 is an acute angle, and the second plate 22 is inclined downwards. This maximizes the size of the heat exchanger 20 within a limited space, thereby improving the heat exchange effect of the heat exchanger 20.

[0049] Furthermore, multiple heat exchange tubes are installed within the second plate 22. These tubes are arranged in a single row along the width of the second plate 22, forming a second refrigerant pipeline. The refrigerant enters and flows within this pipeline to exchange heat with the airflow passing through the second plate 22. The even distribution of these heat exchange tubes within the second plate 22 ensures sufficient contact between the airflow and the refrigerant, thereby guaranteeing the heat exchange effect of the heat exchanger 20.

[0050] Furthermore, the heat exchanger 20 may include a third plate 23, the upper end of which overlaps with the lower end of the second plate 22, and a third refrigerant pipe is provided on the third plate 23. Specifically, the upper end of the third plate 23 overlaps with the lower end of the second plate 22, forming an angle between the third plate 23 and the second plate 22. The third plate 23 is placed at an angle downwards to increase its surface area, thereby increasing the contact area between the airflow and the third plate 23 and improving the heat exchange effect of the heat exchanger 20.

[0051] Furthermore, multiple heat exchange tubes are installed within the third plate 23. These heat exchange tubes are arranged in a single row along the width of the third plate 23, forming a third refrigerant pipeline. The refrigerant enters and flows within the third refrigerant pipeline to exchange heat with the airflow passing through the third plate 23. The multiple heat exchange tubes are evenly distributed within the third plate 23 to ensure sufficient contact between the airflow and the refrigerant, thereby ensuring the heat exchange effect of the heat exchanger 20.

[0052] The heat exchanger 20 is a single-row heat exchanger 20. The heat exchanger 20 includes multiple heat exchange tubes arranged in a single row within the heat exchanger 20. The single-row heat exchanger 20 occupies a smaller volume and has higher heat exchange efficiency, ensuring the heat exchange effect of the heat exchanger 20.

[0053] During the refrigeration process, condensation occurs in the heat exchanger 20 due to the alternation of hot and cold air flows, which is common on the air duct component 12. In some embodiments of this utility model, the inlet of the first refrigerant line is adjacent to the outlet of the second refrigerant line (e.g., Figure 1 , Figure 4 , Figure 6 , Figure 8 and Figure 10 (As shown). That is to say, the inlet of the first refrigerant pipe is located at the lower end of the first plate 21, and the outlet of the second refrigerant pipe is located at the upper end of the second plate 22, so that the inlet of the first refrigerant pipe and the outlet of the second refrigerant pipe are adjacent to each other.

[0054] When the ducted air conditioner 100 is cooling, the heat exchanger 20 acts as an evaporator, absorbing heat from the airflow. The temperature of the refrigerant at the inlet of the first refrigerant line is relatively low. Because the refrigerant absorbs heat as it flows through the second refrigerant line, the temperature of the refrigerant at the outlet of the second refrigerant line is higher than that at the inlet of the second refrigerant line. Since the refrigerant temperatures at the inlets of the first and second refrigerant lines are similar, the temperature of the refrigerant at the outlet of the second refrigerant line is higher than that at the inlet of the first refrigerant line.

[0055] Therefore, the airflow temperature flowing out from the lower end of the first plate 21 is lower, and the airflow temperature flowing out from the upper end of the second plate 22 is higher. Since the inlet of the first refrigerant pipe and the outlet of the second refrigerant pipe are adjacent, the lower temperature airflow (cold air) and the higher temperature airflow (hot air) mix in advance at the junction of the first plate 21 and the second plate 22, avoiding subsequent hot and cold alternation, which would lead to excessive condensation on the air duct component 12 and reduce the generation of condensation.

[0056] In other embodiments, reference is made to Figure 3 , Figure 5 , Figure 7 , Figure 11 As shown, the outlet of the first refrigerant pipe is adjacent to the inlet of the second refrigerant pipe. That is, the outlet of the first refrigerant pipe is located at the lower end of the first plate 21, and the inlet of the second refrigerant pipe is located at the upper end of the second plate 22, so that the outlet of the first refrigerant pipe and the inlet of the second refrigerant pipe are adjacent.

[0057] When the ducted air conditioner 100 is cooling, the heat exchanger 20 acts as an evaporator, absorbing heat from the airflow. The refrigerant temperature at the inlet of the second refrigerant line is lower. Because the refrigerant absorbs heat as it flows through the first refrigerant line, the refrigerant temperature at the outlet of the first refrigerant line is higher than that at the inlet. Since the refrigerant temperatures at the inlet of the second refrigerant line are similar to those at the inlet of the first refrigerant line, the refrigerant temperature at the outlet of the first refrigerant line is higher than that at the inlet of the second refrigerant line.

[0058] Therefore, the airflow temperature is higher when it flows out from the lower end of the first plate 21 and lower when it flows out from the upper end of the second plate 22. Since the outlet of the first refrigerant pipe is adjacent to the inlet of the second refrigerant pipe, the lower temperature airflow (cold air) and the higher temperature airflow (hot air) mix in advance at the junction of the first plate 21 and the second plate 22 to avoid subsequent hot and cold alternation, which would cause excessive condensation on the fan 13 and reduce the generation of condensation.

[0059] Therefore, the airflow with a large temperature difference at the junction of the first plate 21 and the second plate 22 can mix in advance, reducing the air dew point and decreasing the risk of condensation.

[0060] according to Figures 6-11 As shown, the third refrigerant pipeline includes: a first section 231, the inlet of which is located at the upper end of the third plate 23, and the outlet of which is located below the inlet of the first section 231. Therefore, the airflow temperature flowing out from the upper end of the third plate 23 is lower.

[0061] The third refrigerant pipeline includes: a second section 232, where the outlet of the first section 231 is connected to the inlet of the second section 232, the outlet of the second section 232 is adjacent to the outlet of the first section 231, and the inlet of the second section 232 is located below the outlet of the second section 232. Specifically, since the outlet of the second section 232 is located below the outlet of the first section 231, and the outlet of the second section 232 is adjacent to the outlet of the first section 231, the outlet of the second section 232 is also adjacent to the inlet of the first section 231; the inlet of the second section 232 is located below the outlet of the second section 232, and the inlet of the second section 232 is located at the lower end of the third plate 23. The inlet of the first section 231 is the third inlet 233, the outlet of the first section 231 is the third outlet 234, the inlet of the second section is the fourth inlet 235, and the outlet of the second section 232 is the fourth outlet 236. During cooling, the airflow temperature at the inlet of the first section 231 is lower, while the airflow temperature at the outlet of the second section 232 is higher. The inlet of the first section 231 and the outlet of the second section 232 are set close to each other, so that the cold air and hot air are mixed in advance, which can reduce the risk of condensation.

[0062] In some other embodiments, the inlet of the third refrigerant pipe is located at the upper end of the third plate 23, and the outlet of the third refrigerant pipe is located at the lower end of the third plate 23 (in conjunction with...). Figures 2-5 (As shown). The refrigerant flows into the third plate 23 from the inlet of the third refrigerant pipe, and after exchanging heat with the airflow in the third plate 23, it flows out from the outlet of the third refrigerant pipe.

[0063] Furthermore, such as Figure 4 and Figure 5 As shown, the ducted air conditioner 100 also includes a first mixing element 31, which is disposed opposite to the outlet of the third refrigerant pipeline and connected to the casing 11. The first mixing element 31 is disposed between the third plate 23 and the duct component 12, so that the airflow below the third plate 23 does not flow directly to the fan 13.

[0064] Since the inlet and outlet of the third refrigerant pipe are located at the upper and lower ends of the third plate 23 respectively, during cooling, the refrigerant temperature at the upper end of the third plate 23 is lower, and the refrigerant temperature at the lower end of the third plate 23 is higher. In other words, the airflow temperature flowing out from the upper end of the third plate 23 is lower, and the airflow temperature flowing out from the lower end of the third plate 23 is higher. When the airflow from the two areas comes into contact with the air duct component 12, condensation is easily generated on the air duct component 12. By installing a first mixing element 31 at the outlet of the third refrigerant pipe, the hot air at the lower end of the third plate 23 can be directed to the upper end of the third plate 23, so that the lower temperature airflow at the upper end of the third plate 23 mixes with the higher temperature airflow at the lower end of the third plate 23, reducing the risk of condensation on the fan 13 and avoiding water blowing.

[0065] Furthermore, the first mixing element 31 is spaced apart from the third plate 23. This arrangement allows the airflow below the third plate 23 to be directed to the top of the third plate 23 and mixed with the airflow above the third plate 23, reducing the risk of condensation on the fan blades of the fan 13 and preventing water blowing from the duct machine 100.

[0066] Furthermore, the gap between the first mixing element 31 and the third plate 23 is H, which satisfies the relationship: 5mm ≤ H ≤ 15mm. That is, the gap between the first mixing element 31 and the third plate 23 is between 5mm and 15mm, and the user can set the actual gap size according to the dimensions of the duct unit 100. The first mixing element 31 can be inclined relative to the third plate 23, or it can be parallel to the third plate 23, ensuring sufficient gap between the outlet of the first mixing element 31 and the third plate 23 to allow airflow to pass through, and ensuring smooth airflow from the third plate 23.

[0067] Combination Figure 10 and Figure 11 As shown, the ducted air conditioner 100 also includes a second mixing element 32, which is connected to the casing 11. The second mixing element 32 is located on the leeward side of the heat exchanger 20 and at the junction of the second plate 22 and the third plate 23. Specifically, the second mixing element 32 is located on the side of the heat exchanger 20 near the duct component 12, between the heat exchanger 20 and the duct component 12. The second mixing element 32 can mix the airflow below the second plate 22 with the airflow above the third plate 23, preventing excessive temperature differences in the airflow at different locations of the heat exchanger 20, which could lead to condensation on the fan 13.

[0068] according to Figure 7 As shown, the first refrigerant pipeline includes a first inlet 211, which is located at the upper end of the first plate 21. That is, refrigerant inside the first plate 21 flows into the first refrigerant pipeline through the first inlet 211. The airflow flowing into the casing 11 from the air inlet exchanges heat with the heat exchanger 20 and then flows out from the top of the first plate 21. During cooling, the refrigerant temperature at the first inlet 211 is lower, therefore the airflow temperature flowing out from the top of the first plate 21 is also lower.

[0069] The first refrigerant pipeline includes a first outlet 212, which is located at the lower end of the first plate 21. The refrigerant within the first plate 21 flows through this first refrigerant pipeline. After heat exchange with the airflow passing through the first plate 21, the refrigerant flows out from the first outlet 212. During cooling, the refrigerant temperature at the first outlet 212 is higher, meaning the airflow exiting from below the first plate 21 is at a higher temperature.

[0070] The second refrigerant pipeline includes a second inlet 221, which is located at the upper end of the second plate 22. That is, the second inlet 221 is adjacent to the first outlet 212, and the refrigerant flows into the second plate 22 from the second inlet 221. During cooling, the refrigerant temperature at the upper end of the second plate 22 is lower. After the airflow flowing into the casing 11 from the air inlet exchanges heat with the second plate 22, the airflow exiting from the top of the second plate 22 is also at a lower temperature. Since the upper end of the second plate 22 overlaps with the lower end of the first plate 21, the higher-temperature airflow exiting from the lower part of the first plate 21 mixes with the lower-temperature airflow exiting from the upper part of the second plate 22 in advance, lowering the air dew point and reducing the risk of condensation.

[0071] The second refrigerant piping includes a second outlet 222, which is located at the lower end of the second plate 22. The refrigerant within the second plate 22 flows through this second refrigerant piping. After heat exchange with the airflow passing through the second plate 22, the refrigerant flows out from the second outlet 222. During cooling, the refrigerant temperature at the second outlet 222 is higher; that is, the temperature of the refrigerant flowing out from the lower part of the second plate 22 is higher.

[0072] In other embodiments, according to Figure 6 As shown, the first refrigerant pipeline includes a first inlet 211, which is located at the lower end of the first plate 21. That is, refrigerant inside the first plate 21 flows into the first refrigerant pipeline through the first inlet 211. The airflow flowing into the casing 11 from the air inlet exchanges heat with the heat exchanger 20 and then flows out from the bottom of the first plate 21. During cooling, the refrigerant temperature at the first inlet 211 is lower, therefore the airflow temperature flowing out from the bottom of the first plate 21 is also lower.

[0073] The first refrigerant pipeline includes a first outlet 212, which is located at the upper end of the first plate 21. The refrigerant within the first plate 21 flows through this first refrigerant pipeline. After heat exchange with the airflow passing through the first plate 21, the refrigerant flows out from the first outlet 212. During cooling, the refrigerant temperature at the first outlet 212 is higher, meaning the airflow exiting from above the first plate 21 has a higher temperature.

[0074] The second refrigerant pipeline includes a second inlet 221, which is located at the lower end of the second plate 22. Refrigerant flows into the second plate 22 through the second inlet 221. During cooling, the refrigerant temperature at the lower end of the second plate 22 is lower. After heat exchange between the airflow flowing into the casing 11 from the air inlet and the second plate 22, the airflow exiting from the bottom of the second plate 22 is also at a lower temperature.

[0075] The second refrigerant piping includes a second outlet 222, located at the upper end of the second plate 22. That is, the second outlet 222 is adjacent to the first inlet 211. The refrigerant within the second plate 22 flows through the second refrigerant piping. After heat exchange with the airflow passing through the second plate 22, the refrigerant flows out from the second outlet 222. During cooling, the refrigerant temperature at the second outlet 222 is higher; that is, the temperature of the refrigerant flowing out from the top of the second plate 22 is higher. The upper end of the second plate 22 overlaps with the lower end of the first plate 21, so the lower-temperature airflow flowing out from below the first plate 21 mixes with the higher-temperature airflow flowing out from above the second plate 22 in advance, lowering the air dew point and reducing the risk of condensation.

[0076] According to a second aspect embodiment of the present invention, a duct air conditioner 100 includes a housing 11, on which air inlets and air outlets are formed on opposite sides. The housing 11 can form air inlets and air outlets, and can form a receiving space inside the housing 11 to facilitate fixing the components of the duct air conditioner 100 and to protect the components of the duct air conditioner 100.

[0077] The ducted air conditioner 100 may include a heat exchanger 20, which is located inside the casing 11 and adjacent to the air inlet. Indoor or outdoor air can flow into the casing 11 through the air inlet, exchange heat with the heat exchanger 20 to form a heat exchange airflow, and then be discharged into the room through the air outlet. Thus, the heat exchanger 20 can be used to heat or cool the airflow to achieve heating or cooling of the indoor air.

[0078] The ducted air conditioner 100 may include an air duct component 12, which may be disposed inside the housing 11. The air duct component 12 can guide the air flowing into the housing 11 so that the airflow can flow more evenly and orderly, and so that the air flowing into the housing 11 can flow through the heat exchanger 20 and exchange heat with the heat exchanger 20 to improve the heat exchange efficiency.

[0079] The ducted air conditioner 100 may include a fan 13, which is disposed within a duct component 12. The duct component 12 is disposed opposite to the heat exchanger 20 and is located within a housing 11. The fan 13 is positioned near the air outlet. The fan 13 can operate to drive airflow, thereby increasing the airflow speed and improving the heat exchange efficiency between the air and the heat exchanger 20, thus improving the cooling or heating efficiency of the ducted air conditioner 100.

[0080] The heat exchanger 20 is a three-fold heat exchanger 20, namely, a first plate 21, a second plate 22 and a third plate 23. The first plate 21, the second plate 22 and the third plate 23 all include heat exchange fins stacked together and heat exchange tubes passing through the heat exchange fins.

[0081] The heat exchanger 20 may include a first plate 21 on which a first refrigerant pipeline is provided. Specifically, the first plate 21 is inclined upwards and inclined toward the air duct 12. Multiple heat exchange tubes are provided inside the first plate 21 and are interconnected to form the first refrigerant pipeline. The multiple heat exchange tubes are evenly distributed inside the first plate 21 to ensure the heat exchange effect of the first plate 21. The multiple heat exchange tubes inside the first plate 21 are arranged in a single row along the width direction of the first plate 21.

[0082] The heat exchanger 20 may include: a second plate 22, the upper end of which overlaps with the lower end of the first plate 21, and a second refrigerant pipeline disposed on the second plate 22. Specifically, the upper end of the second plate 22 overlaps with the lower end of the first plate 21, the angle between the second plate 22 and the first plate 21 is an acute angle, and the second plate 22 is inclined downwards to maximize the size of the heat exchanger 20 within a limited space, thereby improving the heat exchange effect of the heat exchanger 20; multiple heat exchange tubes are disposed inside the second plate 22, and the multiple heat exchange tubes are arranged in a single row along the width direction of the second plate 22.

[0083] The heat exchanger 20 may include a third plate 23, the upper end of which overlaps with the lower end of the second plate 22, and a third refrigerant pipe is provided on the third plate 23. Specifically, the upper end of the third plate 23 overlaps with the lower end of the second plate 22, forming an angle between the third plate 23 and the second plate 22. The third plate 23 is placed at an angle downwards to increase its surface area and the contact area between the airflow and the third plate 23, thereby improving the heat exchange effect of the heat exchanger 20. Multiple heat exchange tubes are provided inside the third plate 23, and the multiple heat exchange tubes are arranged in a single row along the width direction of the third plate 23.

[0084] In this configuration, the outlet of the first refrigerant pipe is located at the lower end of the first plate 21, and the inlet of the second refrigerant pipe is located at the upper end of the second plate 22. Specifically, the lower end of the first plate 21 overlaps with the upper end of the second plate 22; when the lower end of the first plate 21 is the outlet of the first refrigerant pipe, the upper end of the second plate 22 is the inlet of the second refrigerant pipe. In other words, the outlet of the first refrigerant pipe is adjacent to the inlet of the second refrigerant pipe.

[0085] When the ducted air conditioner 100 is cooling, the heat exchanger 20 acts as an evaporator, absorbing heat from the airflow. The refrigerant temperature at the inlet of the second refrigerant line is lower. Because the refrigerant absorbs heat as it flows through the first refrigerant line, the refrigerant temperature at the outlet of the first refrigerant line is higher than that at the inlet. Since the refrigerant temperatures at the inlet of the second refrigerant line are similar to those at the inlet of the first refrigerant line, the refrigerant temperature at the outlet of the first refrigerant line is higher than that at the inlet of the second refrigerant line.

[0086] Therefore, the airflow temperature is higher when it flows out from the lower end of the first plate 21 and lower when it flows out from the upper end of the second plate 22. Since the outlet of the first refrigerant pipe is adjacent to the inlet of the second refrigerant pipe, the lower temperature airflow (cold air) and the higher temperature airflow (hot air) mix in advance at the junction of the first plate 21 and the second plate 22 to avoid subsequent hot and cold alternation, which would cause excessive condensation on the air duct component 12 and reduce the generation of condensation.

[0087] In some other embodiments, the inlet of the first refrigerant pipe is located at the lower end of the first plate 21, and the outlet of the second refrigerant pipe is located at the upper end of the second plate 22. Specifically, the lower end of the first plate 21 overlaps with the upper end of the second plate 22, and when the lower end of the first plate 21 is the inlet of the first refrigerant pipe, the upper end of the second plate 22 is the outlet of the second refrigerant pipe. That is, the inlet of the first refrigerant pipe and the outlet of the second refrigerant pipe are adjacent to each other.

[0088] When the ducted air conditioner 100 is cooling, the heat exchanger 20 acts as an evaporator, absorbing heat from the airflow. The temperature of the refrigerant at the inlet of the first refrigerant line is relatively low. Because the refrigerant absorbs heat as it flows through the second refrigerant line, the temperature of the refrigerant at the outlet of the second refrigerant line is higher than that at the inlet of the second refrigerant line. Since the refrigerant temperatures at the inlets of the first and second refrigerant lines are similar, the temperature of the refrigerant at the outlet of the second refrigerant line is higher than that at the inlet of the first refrigerant line.

[0089] Therefore, the airflow temperature flowing out from the lower end of the first plate 21 is lower, and the airflow temperature flowing out from the upper end of the second plate 22 is higher. Since the inlet of the first refrigerant pipe and the outlet of the second refrigerant pipe are adjacent, the lower temperature airflow (cold air) and the higher temperature airflow (hot air) mix in advance at the junction of the first plate 21 and the second plate 22, avoiding subsequent hot and cold alternation, which would lead to excessive condensation on the air duct component 12 and reduce the generation of condensation.

[0090] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0092] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ducted air conditioning unit, comprising: The housing has an air inlet and an air outlet formed on opposite sides; A heat exchanger, wherein the heat exchanger is disposed within the housing; The air duct component is disposed inside the housing, and is located near the air outlet relative to the heat exchanger. The air duct component is disposed opposite to the heat exchanger. A fan is installed inside the air duct component. The fan drives air to enter the housing from the air inlet. The air passes through the heat exchanger, exchanges heat with the heat exchanger, flows to the air duct component, and then enters the room through the air outlet. The heat exchanger is characterized in that it comprises: The first plate has a first refrigerant pipe installed on it. The second plate has its upper end overlapping the lower end of the first plate, and a second refrigerant pipe is provided on the second plate. The third plate has its upper end overlapping the lower end of the second plate, and a third refrigerant pipe is provided on the third plate. Wherein, the inlet of the first refrigerant pipeline is adjacent to the outlet of the second refrigerant pipeline; or, the outlet of the first refrigerant pipeline is adjacent to the inlet of the second refrigerant pipeline.

2. The duct air conditioner according to claim 1, characterized in that, The third refrigerant pipeline includes: The first section includes a first section inlet and a first section outlet. The first section inlet is located at the upper end of the third plate, and the first section outlet is located below the first section inlet. The second segment includes a second entry point and a second exit point, with the entry point located below the exit point. The inlet of the second segment is connected to the outlet of the first segment, and the outlet of the second segment is adjacent to the outlet of the first segment.

3. The duct air conditioner according to claim 1, characterized in that, The inlet of the third refrigerant pipe is located at the upper end of the third plate, and the outlet of the third refrigerant pipe is located at the lower end of the third plate.

4. The duct air conditioner according to claim 3, characterized in that, Also includes: The first mixing element is disposed opposite to the outlet of the third refrigerant pipeline and connected to the housing.

5. The duct air conditioner according to claim 4, characterized in that, The first mixing element and the third plate are spaced apart, and the gap between the first mixing element and the third plate is H, which satisfies the relationship: 5 mm ≤ H ≤ 15 mm.

6. The duct air conditioner according to claim 1, characterized in that, Also includes: The second mixing element is connected to the housing and is located on the leeward side of the heat exchanger. The second mixing element is located at the overlap of the second plate and the third plate.

7. The duct air conditioner according to claim 1, characterized in that, The first refrigerant pipeline includes: The first inlet is located at the upper end of the first plate. The first outlet is located at the lower end of the first plate. The second refrigerant pipeline includes: The second inlet is located at the upper end of the second plate. The second outlet is located at the lower end of the second plate.

8. The duct air conditioner according to claim 1, characterized in that, The first refrigerant pipeline includes: The first inlet is located at the lower end of the first plate. The first outlet is located at the upper end of the first plate. The second refrigerant pipeline includes: The second inlet is located at the lower end of the second plate. The second outlet is located at the upper end of the second plate.

9. The duct air conditioner according to claim 1, characterized in that, The heat exchanger includes multiple heat exchange tubes arranged in a single row.

10. A ducted air conditioning unit, comprising: The housing has an air inlet and an air outlet formed on opposite sides; A heat exchanger, wherein the heat exchanger is disposed within the housing and adjacent to the air inlet; The air duct component is disposed opposite to the heat exchanger, and is located inside the housing and adjacent to the air outlet. A fan is installed inside the air duct component. The fan drives air to enter the housing from the air inlet. The air passes through the heat exchanger, exchanges heat with the heat exchanger, flows to the air duct component, and then enters the room through the air outlet. Its features are, The heat exchanger includes: The first plate has a first refrigerant pipe installed on it. The second plate has its upper end overlapping the lower end of the first plate, and a second refrigerant pipe is provided on the second plate. The third plate has its upper end overlapping the lower end of the second plate, and a third refrigerant pipe is provided on the third plate. Wherein, the inlet of the first refrigerant pipe is located at the lower end of the first plate and the outlet of the second refrigerant pipe is located at the upper end of the second plate; or, The outlet of the first refrigerant pipe is located at the lower end of the first plate, and the inlet of the second refrigerant pipe is located at the upper end of the second plate.

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