Duct type air conditioner

Abstract

According to the duct type air conditioner, refrigerant leakage can be detected in time, and therefore the flammable and explosive risks caused by refrigerant leakage of the duct type air conditioner are reduced. The duct type air conditioner comprises a machine shell; the indoor heat exchanger is arranged in the machine shell; the refrigerant input pipe and the refrigerant output pipe are at least partially arranged in the machine shell, located on one side of the indoor heat exchanger and connected with an input port and an output port of the indoor heat exchanger respectively. The water pan is arranged in the machine shell, is arranged opposite to the indoor heat exchanger and is arranged to collect condensate water generated by the indoor heat exchanger; the flow guide plate is matched with the indoor heat exchanger and the water receiving disc and is arranged to guide condensate water dripping from the refrigerant input pipe and the refrigerant output pipe into the water receiving disc, and a detection space is defined by the flow guide plate, the indoor heat exchanger, the water receiving disc and the machine shell; and the refrigerant detection sensor is arranged in the detection space.

Description

Technical Field

[0001] The present application relates to but is not limited to the field of air conditioning technology, and specifically refers to a duct air conditioner. Background Art

[0002] At present, refrigerant leakage may occur during the use of ducted air conditioners. After a period of time, the concentration of the leaked refrigerant is high, and some refrigerants are flammable, resulting in the risk of flammability and explosion. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a duct air conditioner which can detect refrigerant leakage in a timely manner, thereby reducing the risk of flammability and explosion caused by refrigerant leakage in the duct air conditioner.

[0004] To this end, an embodiment of the present application provides a duct air conditioner, comprising: a casing; an indoor heat exchanger, disposed in the casing; a refrigerant inlet pipe and a refrigerant outlet pipe, at least partially disposed in the casing and located on one side of the indoor heat exchanger, and respectively connected to the inlet and outlet of the indoor heat exchanger; a water collecting pan, disposed in the casing and arranged opposite to the indoor heat exchanger, and configured to collect condensed water generated by the indoor heat exchanger; a guide plate, cooperating with the indoor heat exchanger and the water collecting pan, configured to guide condensed water dripping from the refrigerant inlet pipe and the refrigerant outlet pipe into the water collecting pan, and the guide plate, the indoor heat exchanger, the water collecting pan and the casing enclose a detection space; a refrigerant detection sensor, disposed in the detection space.

[0005] The duct machine provided in the embodiment of the present application is provided with a refrigerant detection sensor in the detection space to detect the leaked refrigerant. Since the leaked refrigerant is usually in a gaseous state, the refrigerant leaked in the casing can be detected by the refrigerant detection sensor co-located in the casing. In addition, since the input port and output port of the indoor heat exchanger, the welding position between the indoor heat exchanger and the refrigerant input pipe and the refrigerant output pipe, the U-shaped pipe section of the refrigerant input pipe and the refrigerant output pipe, etc. are all located in the detection space or are close to the detection space, the leaked refrigerant can be detected by the refrigerant detection sensor in the detection space in a timely and rapid manner, and the detection sensitivity is high. The refrigerant leaked from the other end of the indoor heat exchanger can also flow into the detection space and be detected by the refrigerant detection sensor. As a result, the refrigerant leaked from the first area of ​​the duct machine that is prone to refrigerant leakage can be detected by the refrigerant detection sensor in a timely manner, which is convenient for the machine or the user to respond in a timely manner, thereby helping to reduce the risk of flammable and explosive.

[0006] Based on the above technical solution, the present application can also be improved as follows.

[0007] In an exemplary embodiment, the water receiving pan includes a first water receiving portion and a second water receiving portion, and the first water receiving portion is connected to the second water receiving portion in a turning direction; the casing is configured to be hoisted or vertically mounted; based on the casing being in a hoisted state, the first water receiving portion is located at the lower side of the indoor heat exchanger, the refrigerant inlet pipe and the refrigerant outlet pipe, the second water receiving portion is vertically arranged on one side of the indoor heat exchanger in the horizontal direction, and the guide plate is located on the upper side of the refrigerant inlet pipe and the refrigerant outlet pipe; based on the casing being in a vertically mounted state, the second water receiving portion is located at the lower side of the indoor heat exchanger, the first water receiving portion is vertically arranged on one side of the indoor heat exchanger in the horizontal direction, and the guide plate is located at the lower side of the refrigerant inlet pipe and the refrigerant outlet pipe.

[0008] In an exemplary embodiment, a drain port is provided at a connection portion between the first water receiving portion and the second water receiving portion, and the guide plate is provided with a water outlet, and the water outlet is configured to drain water to the connection portion between the first water receiving portion and the second water receiving portion.

[0009] In an exemplary embodiment, the guide plate includes a plate body, a flange and a connecting protrusion, the flange is provided at an end of the plate body away from the indoor heat exchanger, and the connecting protrusion is provided at an end of the plate body close to the indoor heat exchanger; the plate body, the flange and the connecting protrusion enclose a guide cavity, and a water outlet is provided at one end of the guide cavity close to the second water receiving part.

[0010] In an exemplary embodiment, the connecting protrusion extends along the width direction of the indoor heat exchanger and is fixedly connected to the side plate of the indoor heat exchanger; the flange at least partially extends obliquely toward the direction close to the connecting protrusion so that the water outlet is formed at one end of the guide plate close to the water receiving tray.

[0011] In an exemplary embodiment, the indoor heat exchanger is tiltedly arranged in the casing, and a support plate is also provided in the casing, the support plate is fixed to the casing and configured to support the indoor heat exchanger; the guide plate is also provided with legs, and the legs are fixed to the support plate.

[0012] In an exemplary embodiment, the connecting protrusion is provided with a limiting groove, the supporting plate is provided with a limiting folded edge, the limiting folded edge is embedded in the limiting groove, the side plate, the limiting folded edge and the connecting protrusion are stacked together and fixedly connected by fasteners.

[0013] In an exemplary embodiment, the flange is further provided with a protruding portion, and the protruding portion is provided with an avoidance groove for the refrigerant input pipe and / or the refrigerant output pipe to pass through.

[0014] In an exemplary embodiment, a heat exchanger connecting plate is further provided in the casing, and the heat exchanger connecting plate is located between the indoor heat exchanger and the water receiving pan, and the heat exchanger connecting plate is connected to the side plate of the indoor heat exchanger, and the heat exchanger connecting plate is connected to the casing and / or the water receiving pan, and the refrigerant detection sensor is fixed to the heat exchanger connecting plate.

[0015] In an exemplary embodiment, the refrigerant input pipe and the refrigerant output pipe are each provided with a pipe joint at one end away from the indoor heat exchanger, and the pipe joint is located outside the casing and is configured to be connected to the indoor and outdoor unit connecting pipes located outside the casing; the duct machine also includes: a return piece, which is sleeved on the pipe joint and the indoor and outdoor unit connecting pipes to seal the connection portion between the pipe joint and the indoor and outdoor unit connecting pipes in the return piece, and the internal space of the return piece is connected to the detection space to guide the refrigerant leaked into the return piece into the detection space.

[0016] In an exemplary embodiment, the return member includes a sealing box, the sealing box is connected to the detection space through a refrigerant guide tube, and the refrigerant guide tube is penetrated through the casing.

[0017] In an exemplary embodiment, the sealing box is provided with a first through hole, a second through hole and a third through hole, the two pipe joints are respectively passed through the first through hole and the second through hole, the refrigerant guide pipe is passed through the third through hole, and the first through hole and the second through hole are located at one end of the sealing box close to the casing; the sealing box is provided with a fourth through hole and a fifth through hole at one end away from the casing, and the two internal and external unit connecting pipes are respectively passed through the fourth through hole and the fifth through hole.

[0018] In an exemplary embodiment, the third through hole is also located at one end of the sealing box close to the housing and between the first through hole and the second through hole.

[0019] In an exemplary embodiment, the sealed box includes a sealed inner box and a sealed outer box, and the sealed outer box is detachably covered on the sealed inner box, so that the sealed box forms a double-layer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a partial three-dimensional structure of an air duct machine provided in some embodiments of the present application;

[0021] Figure 2 for Figure 1 a bottom view schematic diagram of the structure shown;

[0022] Figure 3 A schematic diagram of a partial three-dimensional structure of a duct machine provided in some embodiments of the present application;

[0023] Figure 4 for Figure 3 A schematic cross-sectional view of the structure shown;

[0024] Figure 5 for Figure 3 The left side structural schematic diagram of the duct machine in the hoisting state is shown;

[0025] Figure 6 for Figure 5 The structural schematic diagram of the duct machine shown is in a vertical installation state;

[0026] Figure 7 A schematic diagram of a partial three-dimensional structure of a duct machine provided in some embodiments of the present application;

[0027] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of the middle part A;

[0028] Fig. 9 A schematic diagram of the three-dimensional structure of a water receiving tray provided in some embodiments of the present application;

[0029] Fig.10 for Fig. 9 The left side structural diagram of the water receiving tray shown;

[0030] Fig.11 for Fig. 9 A schematic diagram of the three-dimensional structure of the water receiving tray from another perspective;

[0031] Fig.12 A schematic diagram of assembling a guide plate and a support plate provided in some embodiments of the present application;

[0032] Fig.13 for Fig.12 A schematic diagram of the three-dimensional structure of the structure shown in another perspective;

[0033] Fig.14 for Fig.13 The structure shown is a left side schematic diagram of the duct unit in a vertical installation state;

[0034] Fig.15 A schematic diagram of the three-dimensional structure of a duct machine provided in some embodiments of the present application;

[0035] Fig.16 A schematic diagram of the structure of a sealed inner box in an open state provided in some embodiments of the present application;

[0036] Fig.17 for Fig.16 The structural schematic diagram of the sealed inner box shown is in a closed state;

[0037] Fig.18 A flowchart of a control method provided for some embodiments of the present application.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1 housing, 11 detection space, 12 support plate, 121 limit folding edge, 13 heat exchanger connecting plate, 14 air inlet, 15 air outlet, 16 middle partition plate, 161 vent;

[0040] 2 indoor heat exchanger, 21 side plate;

[0041] 31 refrigerant input pipe, 32 refrigerant output pipe, 33 pipe joint, 34 internal and external unit connection pipe;

[0042] 4 water receiving tray, 41 first water receiving portion, 411 supporting portion, 42 second water receiving portion, 43 drainage port;

[0043] 5 sealing box, 51 box cover, 511 first connecting hole, 512 lug, 513 buckle, 514 third connecting hole, 515 connecting boss, 516 reinforcing rib, 52 box body, 521 second connecting hole, 522 slot, 523 extension plate, 524 connecting column, 531 first through hole, 532 second through hole, 533 third through hole, 534 fourth through hole, 535 fifth through hole, 54 sealing inner box, 55 sealing outer box, 56 refrigerant guide pipe;

[0044] 6. Refrigerant detection sensor;

[0045] 7 guide plate, 71 plate body, 72 flange, 721 protruding portion, 721 avoidance groove, 73 connecting protrusion, 731 connecting hole, 732 limiting groove, 74 guide cavity, 741 water outlet, 75 supporting leg, 76 inclined plate;

[0046] 8 water pumps, 81 drainage pipes.

[0047] in, Figures 1 to 5 , Figure 7 , Fig. 9 , Fig.10 , Fig.15 The directions marked in the figure are based on the case of the ducted air conditioner being in the hoisting state. Figure 6 , Fig.11 , Fig.14 The directions marked in the figure are based on the case of the duct unit being in upright position. DETAILED DESCRIPTION

[0048] The principles and features of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0049] like Figures 1 to 8As shown, an embodiment of the present application provides a duct air conditioner, comprising: a casing 1, an indoor heat exchanger 2, a refrigerant input pipe 31 and a refrigerant output pipe 32, a water receiving tray 4, a guide plate 7 and a refrigerant detection sensor 6.

[0050] Specifically, the indoor heat exchanger 2 is arranged in the housing 1. The indoor heat exchanger 2 may include a heat exchanger body and elbows arranged at both ends of the heat exchanger body, such as Figure 2 As shown. A heat exchange channel may be provided in the heat exchanger body, and the heat exchange channels may be arranged in a row. The elbows at both ends may be welded and connected to the heat exchanger body to make the heat exchange channels communicate. An input port for inputting the refrigerant into the indoor heat exchanger 2 and an output port for the refrigerant to flow out of the indoor heat exchanger 2 are provided at one end of the heat exchanger body.

[0051] The refrigerant inlet pipe 31 and the refrigerant outlet pipe 32 are at least partially disposed in the housing 1. Figure 1 and Figure 2 As shown, it is located at one side of the indoor heat exchanger 2. In addition, the refrigerant input pipe 31 and the refrigerant output pipe 32 are connected to the input port and the output port of the indoor heat exchanger 2 respectively.

[0052] The water receiving tray 4 is arranged in the housing 1. Figures 3 to 6 As shown, it is arranged opposite to the indoor heat exchanger 2 and is arranged to collect condensed water generated by the indoor heat exchanger 2.

[0053] like Figures 4 to 7 As shown, the guide plate 7 cooperates with the indoor heat exchanger 2 and the water receiving pan 4, and is configured to guide the condensed water dripping from the refrigerant input pipe 31 and the refrigerant output pipe 32 to the water receiving pan 4, ensuring that the condensed water generated by the refrigerant input pipe 31 and the refrigerant output pipe 32 can also flow into the water receiving pan 4, avoiding the adverse effect of the condensed water on the operation of the machine. In addition, the guide plate 7, the indoor heat exchanger 2, the water receiving pan 4 and the casing 1 enclose a detection space 11, as shown in FIG. Figure 3 and Figure 5 shown.

[0054] The refrigerant detection sensor 6 is arranged in the detection space 11. Figure 3 and Figure 5 shown.

[0055] The housing 1 is the housing 1 of the indoor unit. The duct unit may also include an outdoor unit (not shown in the figure). The indoor unit and the outdoor unit are connected by two indoor and outdoor unit connecting pipes 34, such as Figure 1 and Figure 2 As shown, it is ensured that the refrigerant can circulate between the indoor unit and the outdoor unit to form a refrigerant cycle.

[0056] The refrigerant input pipe 31 may include a main pipe and a plurality of branch pipes connected to the main pipe. The refrigerant output pipe 32 may also include a main pipe and a plurality of branch pipes connected to the main pipe. The main pipe may include a pipe section bent into a U shape, such as Figure 5 and Figure 6 One end of the main pipe is connected to the pipe joint 33, and the other end of the main pipe is connected to multiple branch pipes, and the multiple branch pipes are connected to the indoor heat exchanger 2. The refrigerant input pipe 31 can be formed by welding multiple pipes. The refrigerant output pipe 32 can be formed by welding multiple pipes.

[0057] After research and analysis, it was found that there are two main areas where refrigerant leakage is prone to occur in ducted air conditioners: the first area is located inside the casing 1 of the indoor unit, which is the welding position of the indoor heat exchanger 2 and the refrigerant inlet pipe 31 and the refrigerant outlet pipe 32 (including the welding positions at both ends of the indoor heat exchanger 2, the welding positions of the indoor heat exchanger 2 and the refrigerant inlet pipe 31 and the refrigerant outlet pipe 32, the U-shaped pipe section of the refrigerant inlet pipe 31 and the refrigerant outlet pipe 32, etc., that is, Figure 2 The second part is located outside the casing 1 of the indoor unit, which is the connection part between the pipe joint 33 and the indoor and outdoor unit connecting pipe 34, that is, Figure 2 The area circled by the small oval on the left side.

[0058] Therefore, the duct machine provided in the embodiment of the present application is provided with a refrigerant detection sensor 6 in the detection space 11 to detect the leaked refrigerant. Since the leaked refrigerant is usually in a gaseous state, the refrigerant leaked in the casing 1 can be detected by the refrigerant detection sensor 6 located in the casing 1. In addition, since the input port and output port of the indoor heat exchanger 2, the welding position of the indoor heat exchanger 2 and the refrigerant input pipe 31 and the refrigerant output pipe 32, the U-shaped pipe section of the refrigerant input pipe 31 and the refrigerant output pipe 32, etc. are all located in the detection space 11 or are close to the detection space 11, the leaked refrigerant can be detected by the refrigerant detection sensor 6 in the detection space 11 in a timely and rapid manner, and the detection sensitivity is high. The refrigerant leaked from the other end of the indoor heat exchanger 2 can also flow into the detection space 11 and be detected by the refrigerant detection sensor 6. As a result, the refrigerant leaked from the first area of ​​the duct machine that is prone to refrigerant leakage can be detected by the refrigerant detection sensor 6 in a timely manner, which is convenient for the machine or the user to respond in a timely manner, thereby helping to reduce the risk of flammable and explosive.

[0059] For example, the refrigerant detection sensor 6 may be provided with an alarm device, or the air conditioner may be additionally provided with an alarm device, so that when the refrigerant detection sensor 6 detects a refrigerant leak, the alarm device may promptly issue a detection alarm.

[0060] In some exemplary embodiments, the water receiving tray 4 includes a first water receiving portion 41 and a second water receiving portion 42. Fig. 9 , Fig.10 and Fig.11 The first water receiving portion 41 is connected to the second water receiving portion 42 by a turning motion. In other words, the water receiving tray 4 is substantially L-shaped.

[0061] The housing 1 is configured to be hoisted or vertically mounted. The chassis of the housing 1 may be provided with lugs, which may be connected to the ceiling for hoisting or to the wall for vertical mounting. In the hoisting state, the chassis is on top. In the vertical mounting state, the chassis is at the back.

[0062] Based on the fact that the housing 1 is in a hoisting state, such as Figure 4 and Figure 5 As shown, the first water receiving part 41 is located at the lower side of the indoor heat exchanger 2, the refrigerant inlet pipe 31 and the refrigerant outlet pipe 32, the second water receiving part 42 is vertically arranged on one side of the indoor heat exchanger 2 in the horizontal direction, and the guide plate 7 is located at the upper side of the refrigerant inlet pipe 31 and the refrigerant outlet pipe 32.

[0063] Based on the fact that the housing 1 is in a vertical installation state, such as Figure 6 As shown, the second water receiving portion 42 is located at the lower side of the indoor heat exchanger 2 , the first water receiving portion 41 is vertically arranged on one side of the indoor heat exchanger 2 in the horizontal direction, and the guide plate 7 is located at the lower side of the refrigerant input pipe 31 and the refrigerant output pipe 32 .

[0064] In this way, when hoisting, Figure 4 and Figure 5 As shown, the condensed water generated by the indoor heat exchanger 2, the refrigerant input pipe 31, and the refrigerant output pipe 32 can be collected by the first water receiving portion 41; when installed vertically, as shown in FIG. Figure 6 The condensed water generated by the indoor heat exchanger 2 can be collected by the second water receiving portion 42, and the condensed water generated by the refrigerant input pipe 31 and the refrigerant output pipe 32 can flow into the second water receiving portion 42 through the guide plate 7, and then be collected by the second water receiving portion 42. In this way, whether it is suspended or vertically installed, the condensed water generated by the indoor heat exchanger 2 can be collected and discharged, avoiding the adverse effects caused by the random dripping of the condensed water.

[0065] Among them, Figures 9 to 11 As shown, the width of the second water receiving portion 42 is relatively narrow, and the width of the first water receiving portion 41 is relatively wide. Figure 4 and Figure 5 As shown, the projections of the indoor heat exchanger 2, the refrigerant input pipe 31, and the refrigerant output pipe 32 on the first water receiving portion 41 are all located inside the first water receiving portion 41, ensuring that the condensed water generated by the indoor heat exchanger 2, the refrigerant input pipe 31, and the refrigerant output pipe 32 can be collected by the first water receiving portion 41. At this time, the guide plate 7 does not play a guiding role.

[0066] When installing, Figure 6 and Fig.11As shown, since the width of the second water receiving portion 42 is relatively narrow, only the projections of the lower part of the indoor heat exchanger 2, the lower part of the refrigerant input pipe 31, and the lower part of the refrigerant output pipe 32 on the second water receiving portion 42 are located in the second water receiving portion 42. Since the shape of the indoor heat exchanger 2 is relatively regular, the condensed water generated in the upper part of the indoor heat exchanger 2 can flow along the indoor heat exchanger 2 to the lower end of the indoor heat exchanger 2 before dripping, so the condensed water generated in the indoor heat exchanger 2 can be collected in the second water receiving portion 42. However, the shapes of the refrigerant input pipe 31 and the refrigerant output pipe 32 are irregular, and condensed water may drip from each part. Therefore, the condensed water generated in the upper part of the refrigerant input pipe 31 and the upper part of the refrigerant output pipe 32 cannot directly fall into the second water receiving portion 42, but first drips onto the guide plate 7, and then flows along the guide plate 7 to the second water receiving portion 42. At this time, the guide plate 7 plays a guiding role.

[0067] In some embodiments, the second water receiving portion 42 and the portion corresponding to the refrigerant input pipe 31 and the refrigerant output pipe 32 extend in a direction away from the first water receiving portion 41, such as Figure 4 , Figure 5 , Figure 6 , Figures 9 to 11 As shown, the second water receiving portion 42 is not a uniform width structure, but is wider at the portion corresponding to the refrigerant input pipe 31 and the refrigerant output pipe 32, and is relatively narrow at the portion corresponding to the indoor heat exchanger 2. This can help to further increase the area of ​​the water receiving pan 4 to improve the water receiving effect of the water receiving pan 4; and avoid the water receiving pan 4 blocking the airflow to the indoor heat exchanger 2. In addition, a water pump 8 can be set in the first water receiving pan 4, such as Figure 1 and Figure 2 As shown. The water pump 8 can be located at the wider part of the second water receiving portion 42. The water pump 8 can be connected to the drain pipe 81 (such as Fig.11 As shown), it is used to quickly drain the water in the water receiving tray 4 into the drain pipe 81.

[0068] In some embodiments, a support portion 411 is provided in the first water receiving portion 41 and abuts against one end of the indoor heat exchanger 2 in the width direction. Fig. 9 and Fig.11 When the indoor heat exchanger 2 is tilted, the support portion 411 may be in the shape of a triangular prism to improve the support strength.

[0069] In some exemplary embodiments, the housing 1 is provided with an air inlet 14 and an air outlet 15, such as Figure 1 As shown, the air inlet 14 and the air outlet 15 are respectively arranged on two opposite side panels of the housing 1. Figure 1As shown, the air inlet 14 is arranged on the rear side plate of the housing 1, and is arranged backward; the air outlet 15 is arranged on the front side plate of the housing 1, and is arranged forward. In the vertical installation state, the air inlet 14 can be arranged downward, and the air outlet 15 can be arranged upward. An air inlet grille can be arranged at the air inlet 14, such as Figure 1 An air outlet grille may be provided at the air outlet 15 .

[0070] A middle partition 16 may be provided in the housing 1. Figure 2 As shown, the middle partition 16 divides the internal space of the housing 1 into a return air chamber and a heat exchanger chamber. The indoor fan is located in the return air chamber, and the indoor heat exchanger 2 is located in the heat exchange chamber. The middle partition 16 is provided with a vent 161, as shown in FIG. Figure 2 As shown, the vent 161 is connected to the air supply port of the volute of the indoor fan. The second water receiving portion 42 is arranged opposite to the middle partition 16 and avoids the vent 161 on the middle partition 16.

[0071] In some exemplary embodiments, a drain port 43 is provided at the connection portion between the first water receiving portion 41 and the second water receiving portion 42. Fig. 9 The guide plate 7 is provided with a water outlet 741, as shown in FIG. Figure 8 , Fig.12 and Fig.13 As shown, the water outlet 741 is configured to drain water to the connection between the first water receiving portion 41 and the second water receiving portion 42. The drain outlet 43 can be connected to a drain pipe 81, which can drain the condensed water collected by the water receiving tray 4. This facilitates the rapid discharge of the condensed water.

[0072] In some exemplary embodiments, the guide plate 7 includes a plate body 71, a flange 72 and a connecting protrusion 73. Figure 8 , Fig.12 and Fig.14 The flange 72 is provided at one end of the plate body 71 away from the indoor heat exchanger 2 . The connecting protrusion 73 is provided at one end of the plate body 71 close to the indoor heat exchanger 2 .

[0073] The plate body 71, the flange 72 and the connecting protrusion 73 enclose a guide cavity 74. Fig.13 As shown, a water outlet 741 is provided at one end of the guide cavity 74 close to the second water receiving portion 42. This is beneficial to improving the guide effect of the guide plate 7 and to preventing the condensed water on the guide plate 7 from leaking to other parts.

[0074] In some exemplary embodiments, the connecting protrusion 73 extends along the width direction of the indoor heat exchanger 2. Figure 7 and Figure 8 As shown, the connecting protrusion 73 is fixedly connected to the side plate 21 of the indoor heat exchanger 2. The connecting protrusion 73 may be provided with a connecting hole 731, such as Fig.12As shown, the connecting holes 731 are fixedly connected to the side plate 21 of the indoor heat exchanger 2 by means of fasteners or the like. The number of connecting holes 731 can be multiple, such as Fig.12 The portion of the connecting protrusion 73 where the connecting hole 731 is provided can be extended to the inner side of the guide cavity 74 and partially thickened, as shown in FIG. Fig.12 as shown to increase connection strength.

[0075] At least a portion of the flange 72 extends obliquely toward the connecting protrusion 73. Fig.12 and Fig.13 As shown, the end of the guide plate 7 close to the water receiving tray 4 forms a water outlet 741. It can be that in the vertical installation state, the lower part of the flange 72 extends obliquely in the downward direction toward the direction close to the connecting protrusion 73, so that the width of the guide cavity 74 becomes narrower and narrower, and the water outlet 741 is formed at the bottom. The upper part of the flange 72 can be arranged roughly parallel to the connecting protrusion 73 to expand the area of ​​the guide plate 7, which is conducive to improving the water receiving effect. Fig.12 and Fig.13 shown.

[0076] This helps to quickly and smoothly discharge the condensed water in the guide cavity 74 and helps to prevent the condensed water on the guide plate 7 from leaking to other parts.

[0077] In some exemplary embodiments, the indoor heat exchanger 2 is tilted in the casing 1, such as Figure 1 In this way, when the thickness of the casing 1 remains unchanged, the indoor heat exchanger 2 is tilted, which is beneficial to increase the volume of the indoor heat exchanger 2, thereby improving the heat exchange effect.

[0078] A support plate 12 is also provided in the housing 1. Figures 4 to 8 The support plate 12 is fixed to the casing 1 and is configured to support the indoor heat exchanger 2. The support portion 411 can support the middle portion of the indoor heat exchanger 2 in the width direction to improve the stability and reliability of the indoor heat exchanger 2 which is arranged tilted.

[0079] The guide plate 7 is also provided with legs 75, such as Figure 12 to Figure 14 As shown, the legs 75 are fixed to the support plate 12. This helps to improve the stability and reliability of the guide plate 7. Figure 12 to Figure 14 As shown, one end of the leg 75 may be connected to the outer surface of the plate body 71, and the other end of the leg 75 may be fixedly connected to the support plate 12 by a fastener (such as a screw) or other means. The guide plate 7 may be an integrated structure.

[0080] In the hoisting state, Figure 4 and Figure 5As shown, the support plate 12 and the legs 75 can be located on the upper side of the indoor heat exchanger 2, the support plate 12 is connected to the chassis of the casing 1 (i.e., the top plate in the hoisting state), and the legs 75 can be substantially perpendicular to the plate body 71. The number of the support plates 12 can be multiple, and the multiple support plates 12 are arranged at intervals along the length direction of the indoor heat exchanger 2. The support plate 12 can be parallel to the side plate 21 of the indoor heat exchanger 2 to avoid the support plate 12 from generating large wind resistance.

[0081] In other embodiments, the guide plate 7 and the support plate 12 may also be an integrated structure.

[0082] In some exemplary embodiments, Fig.13 As shown, the connecting protrusion 73 is provided with a limiting groove 732, and the supporting plate 12 is provided with a limiting folded edge 121, which is embedded in the limiting groove 732. The side plate 21, the limiting folded edge 121 and the connecting protrusion 73 are stacked together and fixedly connected by fasteners.

[0083] In this way, the indoor heat exchanger 2, the guide plate 7 and the support plate 12 can be fixedly connected together through one process, the connection is firm and the assembly process is simple.

[0084] One end of the connecting protrusion 73 away from the supporting plate 12 can be directly fixedly connected to the side plate 21 of the indoor heat exchanger 2 by a fastener.

[0085] In some exemplary embodiments, the flange 72 is further provided with a protruding portion 721, such as Figure 12 to Figure 14 The protruding portion 721 is provided with an avoidance groove 7211 for the refrigerant input pipe 31 and / or the refrigerant output pipe 32 to pass through. Figure 12 to Figure 14 shown.

[0086] In this way, the flange 72 of the guide plate 7 can also play a role in limiting and fixing the refrigerant inlet pipe 31 and the refrigerant outlet pipe 32, which is beneficial to improving the stability of the refrigerant inlet pipe 31 and the refrigerant outlet pipe 32.

[0087] There can be only one avoidance groove 7211, which is used to avoid the refrigerant input pipe 31 or the refrigerant output pipe 32. Figure 12 to Figure 14 There may also be two avoidance grooves 7211, which are used to avoid the refrigerant input pipe 31 and the refrigerant output pipe 32 respectively. The avoidance groove 7211 may be a part of a circular groove, such as Figure 12 to Figure 14 The housing 1 may include a pipe pressure plate, which can limit the refrigerant input pipe 31 and the refrigerant output pipe 32 together with the side plate of the housing 1 to ensure that the refrigerant input pipe 31 and the refrigerant output pipe 32 are reliably fixed. The portion of the protruding portion 721 provided with the avoidance groove can also extend into the guide cavity 74, such as Fig.13As shown, the avoidance groove 7211 has a certain axial depth to provide a better limiting support for the refrigerant input pipe 31 and / or the refrigerant output pipe 32 .

[0088] In some embodiments, the guide plate 7 further includes an inclined plate 76, such as Fig.12 and Fig.14 In the vertical installation state, the inclined plate 76 is connected to the upper end of the plate body 71, the upper end of the connecting protrusion 73 and the upper end of the flange 72. In the vertical installation state, the inclined plate 76 is located at the upper end of the guide plate 7, as shown in FIG. Fig.14 As shown, the angle between the inclined plate 76 and the horizontal direction is greater than the angle between the plate body 71 and the horizontal direction. The inclined plate 76 helps the condensed water to flow to the water receiving tray 4 faster.

[0089] In some exemplary embodiments, a heat exchanger connecting plate 13 is further provided in the housing 1. Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 8 The heat exchanger connecting plate 13 is located between the indoor heat exchanger 2 and the water receiving pan 4. In addition, the heat exchanger connecting plate 13 is connected to the side plate 21 of the indoor heat exchanger 2, as shown in FIG. Figure 8 As shown, the heat exchanger connecting plate 13 is connected to the housing 1 and / or the water receiving tray 4. The heat exchanger connecting plate 13, the left end of the indoor heat exchanger 2, the guide plate 7, the left side plate of the housing 1, and the water receiving tray 4 enclose a detection space 11.

[0090] This solution is beneficial to improving the fixing reliability of the indoor heat exchanger 2.

[0091] In the hoisting state, the heat exchanger connecting plate 13 can be located at the lower side of the indoor heat exchanger 2. The heat exchanger connecting plate 13 can be triangular, such as Figure 7 As shown, the bevel of the heat exchanger connecting plate 13 can be fixedly connected to one end of the side plate 21 of the inclined indoor heat exchanger 2. In this way, the heat exchanger connecting plate 13 can also play the role of a triangular reinforcement rib, which is conducive to improving the fixing reliability of the indoor heat exchanger 2.

[0092] The refrigerant detection sensor 6 is fixed to the heat exchanger connecting plate 13. Figure 7 , Figure 8 In this way, no additional components are needed to fix the refrigerant detection sensor 6, which is beneficial to reducing the number of components and thus beneficial to saving production costs.

[0093] In some exemplary embodiments, the ends of the refrigerant input pipe 31 and the refrigerant output pipe 32 away from the indoor heat exchanger 2 are both provided with a pipe joint 33, such as Figure 1 and Figure 2 The pipe joint 33 is located outside the casing 1 and is configured to be connected to an internal and external machine connection pipe 34 located outside the casing 1 .

[0094] The duct machine also includes: return parts, such as Fig.15 The return piece is sleeved on the pipe joint 33 and the internal and external machine connecting pipe 34 to seal the connection part between the pipe joint 33 and the internal and external machine connecting pipe 34 in the return piece. The internal space of the return piece is connected to the detection space 11 to guide the refrigerant leaking into the return piece into the detection space 11.

[0095] In this way, the refrigerant leaking from the casing 1 can enter the casing 1 through the return member, and thus the refrigerant leaking from the casing 1 can also be detected by the refrigerant detection sensor 6. In this way, the duct unit only needs to be provided with one refrigerant detection sensor 6 to detect the refrigerant leakage of the entire unit, effectively reducing the risk of flammability and explosion caused by refrigerant leakage of the duct unit, and a relatively small number (one) of refrigerant detection sensors 6 can be used to detect the refrigerant leakage of the entire unit, which is conducive to simplifying the structure of the duct unit and reducing production costs.

[0096] In some exemplary embodiments, the reflux member includes a sealing box 5, such as Fig.15 As shown, the sealing box 5 is connected to the detection space 11 through a refrigerant guide tube 56 , and the refrigerant guide tube 56 is disposed through the housing 1 .

[0097] In this way, the refrigerant leaking from the connection between the pipe joint 33 and the internal and external unit connecting pipe 34 can be sealed in the sealing box 5, preventing the leaked refrigerant from spreading outward over a large area, which is beneficial to quickly increase the concentration of the leaked refrigerant in the sealing box 5, thereby helping to further improve the detection sensitivity of the refrigerant detection sensor 6.

[0098] In some exemplary embodiments, Fig.16 and Fig.17 As shown, the sealing box 5 is provided with a first through hole 531, a second through hole 532 and a third through hole 533. Two pipe joints 33 are respectively provided in the first through hole 531 and the second through hole 532. The refrigerant guide pipe 56 is provided in the third through hole 533. The first through hole 531 and the second through hole 532 are located at one end of the sealing box 5 close to the housing 1.

[0099] like Fig.16 and Fig.17 As shown, a fourth through hole 534 and a fifth through hole 535 are provided at one end of the sealing box 5 away from the housing 1. Two internal and external machine connecting pipes are respectively passed through the fourth through hole 534 and the fifth through hole 535.

[0100] This ensures that the connection parts of the two pipe joints 33 and the two internal and external machine connecting pipes 34 are both located in the sealing box 5, and the detection requirements can be met by using one sealing box 5 and one refrigerant guide pipe 56, which is conducive to reducing the number of parts, simplifying the structure, and improving assembly efficiency.

[0101] Among them, Fig.16 and Fig.17 As shown, the first through hole 531, the second through hole 532, the third through hole 533, the fourth through hole 534, and the fifth through hole 535 can extend outward to form a tubular structure, which is beneficial to improving the matching reliability between the sealing box 5 and the piping joint 33, the internal and external machine connecting pipe 34 and the refrigerant guide pipe 56 and is beneficial to preventing refrigerant leakage.

[0102] Of course, multiple sealing boxes 5 can also be provided, for example, two sealing boxes 5 respectively seal the connection parts between the two pipe joints 33 and the two internal and external machine connecting pipes 34, and each sealing box 5 is connected to the first refrigerant detection area 151 through a refrigerant guide tube 56. Alternatively, the two sealing boxes 5 are connected through a refrigerant guide tube 56, and one of the sealing boxes 5 is connected to the first refrigerant detection area 151 through another refrigerant guide tube 56.

[0103] In some exemplary embodiments, the third through hole 533 is also located at one end of the sealing box 5 close to the housing 1. Fig.16 and Fig.17 As shown, and is located between the first through hole 531 and the second through hole 532 .

[0104] This helps shorten the length of the refrigerant guide tube 56 (which can shorten the refrigerant flow path), and the refrigerant guide tube 56 can be a straight tube (which can reduce the refrigerant flow resistance), which in turn helps the refrigerant in the sealing box 5 to quickly enter the first refrigerant detection area 151, which helps to further improve the refrigerant detection sensitivity of the refrigerant detection sensor 6.

[0105] Furthermore, this allows the refrigerant guide pipe 56 to be located between the two pipe joints 33 and be very close to the two pipe joints 33. Therefore, when refrigerant leakage occurs at the connection point between any pipe joint 33 and the corresponding internal and external unit connecting pipe 34, the refrigerant can quickly reach the refrigerant guide pipe 56 and then quickly enter another refrigerant detection area, which is also beneficial to further improve the refrigerant detection sensitivity of the refrigerant detection sensor 6.

[0106] In addition, the structure of the sealing box 5 can be relatively regular, which is convenient for processing and forming.

[0107] Of course, the third through hole 533 may also be arranged at other positions of the sealing box 5 , such as on the bottom wall of the sealing box 5 .

[0108] In some exemplary embodiments, the sealed box 5 includes a sealed inner box 54 and a sealed outer box 55. Fig.15 As shown, the sealed outer box 55 is detachably covered on the sealed inner box 54, so that the sealed box 5 forms a double-layer structure. Compared with the single-layer structure, the double-layer structure is conducive to improving the sealing reliability of the sealed box 5.

[0109] In some exemplary embodiments, the sealed inner box 54 and the sealed outer box 55 each include: a box body 52 and a box cover 51, such as Fig.16 and Fig.17 One end of the box body 52 is rotatably connected to one end of the box cover 51, and the other end of the box body 52 is detachably connected to the other end of the box cover 51, as shown. Figure 6 and Figure 7 shown.

[0110] During assembly, the box cover 51 of the sealed inner box 54 can be opened first, and then the box body 52 is aligned with the pipe joint 33, the internal and external machine connecting pipe 34 and the refrigerant guide pipe 56, and then the box cover 51 is covered, and then the sealed outer box 55 is installed, and finally the box body and the box cover are fixed. Among them, the sealed inner box 54 and the sealed outer box 55 can be fixed together or separately. Since the box cover 51 will not be completely disassembled, it is only necessary to ensure that the other end of the box cover 51 is aligned and connected with the other end of the box body 52, which is conducive to simplifying the installation process of the sealed box 5.

[0111] Of course, the connection method between the box cover 51 and the box body 52 is not limited thereto. For example, both ends of the box cover 51 can be detachably connected to the box body 52 .

[0112] In some exemplary embodiments, one end of the box body 52 and one end of the box cover 51 are rotatable integral structures, such as Fig.16 The other end of the box body 52 is detachably connected to the other end of the box cover 51 through a buckle 513 and a first fastener.

[0113] The box cover 51 can be covered on the box body 52 by rotating 180° along one end thereof, and can be opened by rotating 180° in the opposite direction.

[0114] like Fig.16 and Fig.17 As shown, the other end of the box cover 51 may be provided with a first connection hole 511, and the other end of the box body 52 may be provided with a second connection hole 521. The first fastener (such as a screw) may pass through the first connection hole 511 and be threadedly connected with the second connection hole 521 to achieve fixed connection between the box cover 51 and the box body 52. ​​One of the box cover 51 and the box body 52 is provided with a buckle 513, and the other is provided with a slot 522. The buckle 513 is engaged with the slot 522, so that the box cover 51 and the box body 52 can be fixed by the buckle 513 and the first connection hole 511 of the box cover 51 is aligned with the second connection hole 521 of the box body 52, so as to facilitate the installation of the first fastener. The number of the first fasteners and the buckle 513 is not limited and can be reasonably set as needed.

[0115] In one embodiment, Fig.16 and Fig.17As shown, the other end of the box cover 51 is provided with two buckles 513 and a lug 512, the two buckles 513 are symmetrically arranged on both sides of the lug 512, and the first connection hole 511 is arranged on the lug 512. The other end of the box body 52 is provided with an extension plate 523, the extension plate 523 is provided with two slots 522 and a second connection hole 521, and the two slots 522 are symmetrically arranged on both sides of the second connection hole 521. Two reinforcing ribs 516 can also be arranged at both ends of the lug 512, and the first connection hole 511 is located between the two reinforcing ribs 516.

[0116] During the assembly process, the two buckles 513 are first inserted into the two slots 522, so that the lugs 512 fit the extension plate 523 and the first connection hole 511 is aligned with the second connection hole 521, and then the first fastener is screwed in. This can reduce the number of first fasteners, which is conducive to improving the installation efficiency of the sealing box 5.

[0117] The other end of the box cover 51 and the other end of the box body 52 can also be arranged to be matched with each other. Fig.16 As shown, the sealing performance of the sealing box 5 is further improved.

[0118] Of course, the other end of the box cover 51 and the other end of the box body 52 can also be detachably connected in other ways, such as only connected by fasteners or only connected by buckles 513.

[0119] In some exemplary embodiments, Fig.16 As shown, the rotation axis of the box cover 51 is parallel to the central axis of the pipe joint 33 , and one end of the box cover 51 and the other end of the box cover 51 are arranged opposite to each other along the arrangement direction of the two pipe joints 33 .

[0120] In this way, the box body 52 can be directly placed under the two pipe joints 33 and then the box cover 51 can be closed. There is no need to carefully pass the pipe joints 33, the internal and external unit connecting pipes 34, and the refrigerant guide pipe 56 through the sealing box 5, which can reduce the difficulty of installation and improve assembly efficiency.

[0121] In some exemplary embodiments, the middle of the box cover 51 and the middle of the box body 52 are fixedly connected by a second fastener, and the second fastener is located between the two pipe joints 33 and locks the box cover 51 and the box body 52 in a direction perpendicular to the rotation axis of the box cover 51. Fig.16 and Fig.17 shown.

[0122] The second fastener can lock and reinforce the middle part of the sealing box 5 to prevent the sealing box 5 from leaking refrigerant due to local gaps caused by the refrigerant pressure or the like.

[0123] In one embodiment, Fig.16 and Fig.17As shown, a third connection hole 514 is provided in the middle of the box body 52, and a connection column 524 is provided on the inner wall surface of the box cover 51, and a second fastener (such as a screw) passes through the third connection hole 514 and is fixedly connected to the connection column 524. A hollow connection boss 515 is provided on the inner wall surface of the box cover 51, and the connection boss 515 abuts against the connection column 524, so that the sealing box 5 can be prevented from being deformed by excessive extrusion. The third connection hole 514 can be a countersunk hole, so that the head of the second fastener can be hidden in the box cover 51 to avoid interference with other structures.

[0124] The first fastener and the second fastener can fix the sealed inner box 54 and the sealed outer box 55 at the same time, which can reduce the number of fasteners and improve assembly efficiency.

[0125] In some exemplary embodiments, sealing sponges (not shown in the figure) are provided between the sealing box 5 and the refrigerant guide pipe 56, between the sealing box 5 and the pipe joint 33, and between the sealing box 5 and the internal and external machine connecting pipe 34. The sealing sponges can further improve the sealing reliability of the sealing box 5 and help alleviate pipeline vibration noise.

[0126] In some exemplary embodiments, the sealing box 5 may be a plastic part, such as a PP (polypropylene) part, which is easy to process and has high processing precision and low cost.

[0127] In some exemplary embodiments, the housing 1 includes a pipe clamp 17, such as Figure 3 and Figure 4 As shown, the refrigerant flow guide pipe 56 and the pipe joint 33 are inserted through the pipe holding plate 17 .

[0128] The inner diameter of the refrigerant flow guiding tube 56 is greater than or equal to 8 mm, which is conducive to ensuring the flow guiding effect of the refrigerant flow guiding tube 56.

[0129] Of course, the inner diameter of the refrigerant flow guide tube 56 is not limited to the above range and can be adjusted as needed.

[0130] The present application also provides a control method for a duct machine according to any one of the above embodiments. The control method includes:

[0131] In the standby state, it is determined that a refrigerant leak occurs according to the detection result of the refrigerant detection sensor 6;

[0132] An alarm signal is issued and the indoor fan is started to blow away the leaked refrigerant.

[0133] When it is determined that no refrigerant leakage has occurred based on the detection result of the refrigerant detection sensor 6, normal standby is maintained.

[0134] The alarm signal may include but is not limited to: an acoustic signal, an optical signal, etc. The acoustic signal may be but is not limited to a beep, and the optical signal may be but is not limited to a flashing light signal.

[0135] In this way, when a refrigerant leak occurs in a ducted air conditioner, it can be detected in time and an alarm can be issued. At the same time, response measures can be taken to disperse the refrigerant to avoid dangerous refrigerant accumulation.

[0136] In one embodiment, Fig.18 As shown, when the duct air conditioner is powered on, the duct air conditioner enters the standby state, and the refrigerant detection sensor 6 can perform the refrigerant detection function. If the refrigerant detection sensor 6 does not detect a refrigerant leak, the duct air conditioner is in normal standby. If the refrigerant detection sensor 6 detects a refrigerant leak, the signal is transmitted to the control board of the duct air conditioner, and the control board of the duct air conditioner outputs a refrigerant leak instruction, the buzzer sounds an alarm, and the indoor fan runs to blow the refrigerant away.

[0137] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0138] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0139] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0140] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0141] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0142] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A duct machine, characterized in that: include: chassis; An indoor heat exchanger is disposed in the casing; A refrigerant input pipe and a refrigerant output pipe are at least partially disposed in the housing and located on one side of the indoor heat exchanger, and are respectively connected to the input port and the output port of the indoor heat exchanger; A water receiving tray is arranged in the casing and opposite to the indoor heat exchanger, and is arranged to collect condensed water generated by the indoor heat exchanger; a guide plate, which cooperates with the indoor heat exchanger and the water receiving pan, and is configured to guide the condensed water dripping from the refrigerant input pipe and the refrigerant output pipe into the water receiving pan, and the guide plate, the indoor heat exchanger, the water receiving pan and the casing enclose a detection space; The refrigerant detection sensor is arranged in the detection space.

2. The air duct machine according to claim 1, characterized in that: The water receiving tray comprises a first water receiving portion and a second water receiving portion, wherein the first water receiving portion is connected to the second water receiving portion by a turning motion; The housing is configured to be hoistable or vertically mounted; Based on the casing being in a hoisting state, the first water receiving portion is located at the lower side of the indoor heat exchanger, the refrigerant input pipe and the refrigerant output pipe, the second water receiving portion is vertically arranged at one side of the indoor heat exchanger in a horizontal direction, and the guide plate is located at the upper side of the refrigerant input pipe and the refrigerant output pipe; Based on the casing being in a vertical state, the second water receiving part is located at the lower side of the indoor heat exchanger, the first water receiving part is vertically arranged on one side of the indoor heat exchanger in the horizontal direction, and the guide plate is located at the lower side of the refrigerant inlet pipe and the refrigerant outlet pipe.

3. The air duct machine according to claim 2, characterized in that: A drainage port is provided at the connection position between the first water receiving portion and the second water receiving portion, and the guide plate is provided with a water outlet, and the water outlet is configured to drain water to the connection position between the first water receiving portion and the second water receiving portion.

4. The air duct machine according to claim 2, characterized in that: The guide plate includes a plate body, a flange and a connecting protrusion, wherein the flange is provided at an end of the plate body away from the indoor heat exchanger, and the connecting protrusion is provided at an end of the plate body close to the indoor heat exchanger; The plate body, the flange and the connecting protrusion enclose a flow guide cavity, and a water outlet is provided at one end of the flow guide cavity close to the second water receiving portion.

5. The air duct machine according to claim 4, characterized in that: The connecting protrusion extends along the width direction of the indoor heat exchanger and is fixedly connected to the side plate of the indoor heat exchanger; At least a portion of the flange extends obliquely toward the direction close to the connecting protrusion, so that the water outlet is formed at one end of the guide plate close to the water receiving tray.

6. The air duct machine according to claim 5, characterized in that: The indoor heat exchanger is tiltedly arranged in the casing, and a support plate is also arranged in the casing. The support plate is fixed to the casing and arranged to support the indoor heat exchanger; the guide plate is also provided with legs, and the legs are fixed to the support plate.

7. The air duct machine according to claim 6, characterized in that: The connecting protrusion is provided with a limiting groove, the supporting plate is provided with a limiting folded edge, the limiting folded edge is embedded in the limiting groove, the side plate, the limiting folded edge and the connecting protrusion are stacked together and fixedly connected by fasteners.

8. The air duct machine according to claim 4, characterized in that: The flange is also provided with a protruding portion, and the protruding portion is provided with an avoidance groove for the refrigerant input pipe and / or the refrigerant output pipe to pass through.

9. The duct machine according to any one of claims 1 to 8, characterized in that: A heat exchanger connecting plate is also provided in the casing, and the heat exchanger connecting plate is located between the indoor heat exchanger and the water receiving pan, and the heat exchanger connecting plate is connected to the side plate of the indoor heat exchanger, and the heat exchanger connecting plate is connected to the casing and / or the water receiving pan, and the refrigerant detection sensor is fixed to the heat exchanger connecting plate.

10. The duct machine according to any one of claims 1 to 8, characterized in that: The refrigerant input pipe and the refrigerant output pipe are both provided with a pipe joint at one end away from the indoor heat exchanger, and the pipe joint is located outside the casing and is configured to be connected to the internal and external machine connecting pipes located outside the casing; The duct air conditioner also includes: a return piece, which is sleeved on the pipe joint and the internal and external unit connecting pipe to seal the connection between the pipe joint and the internal and external unit connecting pipe in the return piece, and the internal space of the return piece is connected to the detection space to guide the refrigerant leaked into the return piece into the detection space.

11. The air duct machine according to claim 10, characterized in that: The return member includes a sealing box, the sealing box is connected to the detection space through a refrigerant guide pipe, and the refrigerant guide pipe is penetrated through the casing.

12. The air duct machine according to claim 11, characterized in that: The sealing box is provided with a first through hole, a second through hole and a third through hole, the two pipe joints are respectively provided in the first through hole and the second through hole, the refrigerant guide pipe is provided in the third through hole, and the first through hole and the second through hole are located at one end of the sealing box close to the housing; A fourth through hole and a fifth through hole are provided at one end of the sealing box away from the housing, and the two internal and external machine connecting pipes are respectively passed through the fourth through hole and the fifth through hole.

13. The air duct machine according to claim 12, characterized in that: The third through hole is also located at one end of the sealing box close to the housing and between the first through hole and the second through hole.

14. The air duct machine according to claim 11, characterized in that: The sealed box comprises a sealed inner box and a sealed outer box, and the sealed outer box is detachably covered on the sealed inner box, so that the sealed box forms a double-layer structure.

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