Flow dividing and collecting device, fan coil and air conditioner indoor unit

Abstract

The liquid distributing and collecting device comprises a shell and an exhaust valve, the shell is provided with a liquid inlet cavity and a liquid outlet cavity which are independent of each other, the liquid inlet cavity is used for distributing liquid to a plurality of liquid inlet pipes, the liquid outlet cavity is used for collecting the liquid of the liquid outlet pipes, and the exhaust valve is arranged at the top of the shell and communicated with the liquid inlet cavity and / or the liquid outlet cavity. Meanwhile, the invention further discloses a fan coil applying the flow dividing and collecting device and an air conditioner indoor unit applying the fan coil, and the technical scheme of the invention can solve the problem that the manual exhaust process of an existing metal water collecting head depends on the experience of assembling personnel, and gas is easily left in fluid in the metal water collecting head.

Description

Technical Field

[0001] This application relates to the technical field of fan coil units, and particularly to a flow distributor, a fan coil unit, and an air conditioner indoor unit. Background Art

[0002] As a key fluid control component of the fan coil unit system, the metal water header is responsible for precisely diverting and efficiently integrating the internal circulating fluid. In related technologies, the existing metal water header is formed by bending multiple outlet branch pipes and inlet branch pipes (collectively referred to as branch pipes below), and then connecting them to the heat exchanger by welding to ensure the smooth circulation of the fluid in the fan coil unit. However, when the fan coil unit enters the commissioning stage after assembly, the installer needs to manually operate the adjusting part of the existing metal water header to exhaust gas on-site: after opening the adjusting part to discharge the gas, then manually judge to close and seal it. After completing the exhaust process, close the adjusting part. This process highly depends on the experience and operation accuracy of the assembly personnel, and the exhaust effect will be affected by multiple factors. For example, if the gas is not completely exhausted, or some gas is mixed in during the process of the fluid filling the exhaust area, it will cause residual gas in the fluid inside the metal water header. After the adjusting part is closed and sealed, the residual gas cannot be discharged in time, making the fan coil unit system inevitably operate in a gas-carrying state during operation. This gas-carrying operation condition will not only cause energy efficiency problems such as uneven fluid flow rate and reduced heat exchange efficiency, but also may be accompanied by reliability risks such as increased unit vibration, elevated noise, and abnormal pipeline stress, posing a significant threat to the stable operation of the fan coil unit. Summary of the Invention

[0003] Embodiments of this application provide a flow distributor, a fan coil unit, and an air conditioner indoor unit, which can overcome the problem that the manual exhaust process of the existing metal water header depends on the experience of the assembly personnel and easily causes residual gas in its internal fluid.

[0004] In a first aspect, embodiments of this application provide a flow distributor applied to an air conditioner indoor unit. The air conditioner indoor unit includes a heat exchanger, and the heat exchanger includes a plurality of liquid inlet pipes and a plurality of liquid outlet pipes. The flow distributor includes:

[0005] A housing having independent liquid inlet and outlet cavities. The liquid inlet cavity is used to divert liquid to the plurality of liquid inlet pipes, and the liquid outlet cavity is used to collect the liquid from the plurality of liquid outlet pipes; and

[0006] An exhaust valve provided at the top of the housing and communicating with the liquid inlet cavity and / or the liquid outlet cavity.

[0007] In an embodiment, the flow distributor further includes:

[0008] An inlet joint provided on the housing and communicating with the liquid inlet cavity;

[0009] A water outlet joint is provided on the housing and communicates with the liquid outlet cavity;

[0010] Wherein, the exhaust valve communicates with the liquid inlet cavity, the exhaust valve is provided on the periphery of the water inlet joint, and / or, the exhaust valve communicates with the liquid outlet cavity, and the exhaust valve is provided on the periphery of the water outlet joint.

[0011] In one embodiment, the exhaust valve includes:

[0012] A valve body main body, detachably connected to the housing;

[0013] A waterproof breathable membrane is provided inside the valve body main body for preventing the liquid in the housing from flowing out and discharging the gas in the housing.

[0014] In one embodiment, the housing further includes:

[0015] An upper cover, including a plastic part and a reinforcing member embedded in the plastic part;

[0016] A lower cover, connected to the upper cover; and,

[0017] A partition member is provided on the upper cover or the lower cover and cooperates with the upper cover and the lower cover to define the liquid inlet cavity and the liquid outlet cavity;

[0018] Wherein, the exhaust valve is fixedly connected to the reinforcing member.

[0019] In one embodiment, an upper clamping groove is provided on the side of the upper cover facing away from the lower cover, and the reinforcing member is embedded inside the upper clamping groove.

[0020] In one embodiment, the upper cover further includes:

[0021] An outer sealing layer is provided on the side of the reinforcing member facing away from the lower cover and abuts against the reinforcing member.

[0022] In one embodiment, an exhaust passage is provided inside the exhaust valve, and the exhaust passage is used for discharging the gas in the housing;

[0023] One of the outer sealing layer and the reinforcing member protrudes along the central axis of the exhaust passage and towards the side away from the reinforcing member to form a third protrusion, and the third protrusion surrounds the periphery of the exhaust valve.

[0024] In one embodiment, the housing includes:

[0025] An upper cover, which is a metal part;

[0026] An upper anti-corrosion shell is at least provided on the inner side of the upper cover;

[0027] A lower cover, connected to the upper cover; and

[0028] The lower anti-corrosion shell is at least arranged on the inner side of the lower cover, and defines a liquid inlet cavity and a liquid outlet cavity which are independent of each other with the upper anti-corrosion shell.

[0029] Wherein, the exhaust valve is arranged on the upper cover.

[0030] In one embodiment, the upper cover comprises:

[0031] An upper top wall, arranged on the top of the upper anti-corrosion shell;

[0032] The upper side wall extends from the upper top wall toward one side of the lower cover and surrounds at least a portion of the circumference of the upper anti-corrosion shell.

[0033] In one embodiment, the upper anti-corrosion shell comprises:

[0034] an upper shell body; and,

[0035] An outer convex edge is extended outward from the upper shell body;

[0036] Wherein, the upper side wall surrounds the circumference of the upper shell body and extends to the outer convex edge.

[0037] In one embodiment, an exhaust passage is provided inside the exhaust valve, and the exhaust passage is used to exhaust the gas in the shell;

[0038] The upper cover is provided with the third protrusion along the central axis of the exhaust passage and protrudes toward a side facing away from the upper anti-corrosion shell, and the third protrusion is arranged around the peripheral side of the exhaust valve.

[0039] In a second aspect, an embodiment of the present application provides a fan coil unit, the fan coil unit comprising:

[0040] The above-mentioned current divider;

[0041] The heat exchanger has a plurality of heat exchange tubes inside, the plurality of heat exchange tubes are all plugged into the shell, and the conducting member can conduct two of the heat exchange tubes.

[0042] In one embodiment, the heat exchanger further comprises:

[0043] The lower plate is arranged on the side of the heat exchanger facing away from the distributor and collector, and is used for being installed and fixed on the casing of the indoor unit of the air conditioner.

[0044] In a third aspect, an embodiment of the present application provides an air conditioner indoor unit, comprising:

[0045] The fan coil unit as described above;

[0046] The housing, the heat exchanger is disposed within the housing and is connected to the housing, the manifold is disposed outside the housing, and the manifold is connected to the housing.

[0047] In one embodiment, the above-mentioned air conditioner indoor unit further includes:

[0048] A water receiving tray is disposed at the bottom of the heat exchanger, and extends out of the housing on one side close to the manifold, so that the upward projection of the water receiving tray can cover the manifold.

[0049] Based on the above embodiment, the liquid distributor proposed in the embodiment of the present application includes a housing and an exhaust valve. Among them, the housing has an independent liquid inlet chamber and a liquid outlet chamber. The liquid inlet chamber is used to distribute the liquid to a plurality of liquid inlet pipes, and the liquid outlet chamber is used to collect the liquid from a plurality of liquid outlet pipes. The exhaust valve is disposed at the top of the housing and communicates with the liquid inlet chamber and / or the liquid outlet chamber.

[0050] Compared with the related art, the technical solution of the present application can exhaust the air inside the housing by providing an exhaust valve on the housing and making the exhaust valve communicate with at least one of the liquid inlet chamber and the liquid outlet chamber inside the housing. If there is residual and accumulated gas in the fluid, the exhaust valve can be used to discharge the gas out of the housing in time, which is convenient for the maintenance and repair of the fan coil unit and the air conditioner indoor unit, and effectively overcomes the problem that the manual exhaust process of the existing metal water header depends on the experience of the assembly personnel and is prone to residual gas in the fluid inside, thereby effectively avoiding the risks such as uneven fluid flow rate, reduced heat exchange efficiency, increased vibration of the unit, increased noise, and abnormal pipeline stress caused by the residual and accumulated gas in the subsequent circulation process of the fluid, and ensuring the stability and reliability during the use of the fan coil unit. Description of the Drawings

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0052] Figure 1 It is an overall structure diagram of a fan coil unit of the present invention;

[0053] Figure 2 It is a partial assembly schematic diagram of a fan coil unit of the present invention from a first perspective;

[0054] Figure 3 It is a partial assembly schematic diagram of a fan coil unit of the present invention from a second perspective;

[0055] Figure 4Top view schematic diagram of a fan coil unit according to the present invention;

[0056] Figure 5 is Figure 4 Schematic cross-sectional view taken along line A-A in

[0057] Figure 6 Flow path schematic diagram of a flow distributor according to the present invention;

[0058] Figure 7 Explosion schematic diagram of a second structural form of a flow distributor according to the present invention;

[0059] Figure 8 Top view schematic diagram of a second structural form of a flow distributor according to the present invention;

[0060] Figure 9 is Figure 8 Schematic cross-sectional view taken along line B-B in

[0061] Figure 10 Schematic structural diagram of a seal in the present invention;

[0062] Figure 11 Explosion schematic diagram of a third structural form of a flow distributor according to the present invention;

[0063] Figure 12 Top view schematic diagram of a third structural form of a flow distributor according to the present invention;

[0064] Figure 13 is Figure 12 Schematic cross-sectional view taken along line C-C in

[0065] Explanation of the reference numerals in the attached drawings:

[0066] 100 - Fan coil unit, 10 - Manifold, 1 - Housing, 10a - Liquid inlet chamber, 10b - Liquid outlet chamber, 11 - Upper cover, 11a - Water inlet through - hole, 11b - Water outlet through - hole, 11c - Exhaust port, 111 - Upper top wall, 112 - Upper side wall, 1131 - First protrusion, 1132 - Second protrusion, 1133 - Third protrusion, 114 - Outer sealing layer, 115 - Upper clamping groove, 12 - Lower cover, 12a - Pipe passing orifice, 13 - Conducting part, 131 - First conducting part, 132 - Second conducting part, 133 - Conducting inner cavity, 14 - Sealing part, 141 - Upper sealing part, 142 - Inner - hole sealing part, 143 - Lower sealing part, 144 - Liquid passing hole, 151 - Plastic part, 152 - Reinforcing part, 16 - Upper anti - corrosion shell, 1611 - Upper shell main body, 1612 - Outer convex edge, 162 - Lower anti - corrosion part, 1621 - Lower shell main body, 1622 - Outer extension part, 17 - Cross - connecting conducting part, 171 - Cross - connecting inner cavity, 19 - Partition part, 2 - Exhaust valve, 21 - Valve body main body, 22 - Valve seat, 3 - Water inlet joint, 31 - Water inlet interface, 4 - Water outlet joint, 41 - Water outlet interface,

[0067] 20 - Heat exchanger, 21 - Heat exchange tube, 20a - Upper side plate, 20b - Lower side plate,

[0068] 200 - Water receiving tray, 300 - Machine shell.

[0069] The realization of the purpose of this application, functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0070] To make the purpose, technical solutions and advantages of this application clearer, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0071] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with this application. On the contrary, they are merely examples of devices and methods that are consistent with some aspects of this application as detailed in the appended claims.

[0072] In the description of this application, it should be understood that terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0074] This application provides an air conditioner indoor unit. In modern life, the air conditioner indoor unit has become an important device for people to adjust parameters such as indoor environmental temperature and humidity, and is widely used in various places. From the bedrooms and living rooms in homes to commercial spaces such as offices, shopping malls, and hotels, and then to public buildings such as hospitals and schools, the air conditioner indoor unit plays an indispensable role. It can create a comfortable indoor environment for people and meet the requirements for temperature, humidity, and air circulation in different scenarios.

[0075] Generally, the air conditioner indoor unit includes a housing and a fan coil 100 installed on the housing. As one of the core components of the air conditioner indoor unit, the main function of the fan coil 100 is to adjust the temperature of the indoor air through heat exchange and promote the circulation of air. Specifically, the fan coil 100 includes a fan and a heat exchanger 20 disposed in the housing. The interior of the heat exchanger 20 has a plurality of heat exchange tubes 21 arranged closely. The heat exchanger 20 is disposed in the housing and is connected to the housing (such as screw connection, snap connection, or welding connection).

[0076] When the circulating liquid (water or refrigerant) in the air conditioner indoor unit flows through the heat exchange tube 21, the heat exchange tube 21 will exchange heat with the indoor air flowing through its surface. If the liquid flowing in the heat exchange tube 21 is a low-temperature liquid, when the indoor air passes through the surface of the heat exchange tube 21, according to the principle of heat transfer, the heat of the indoor air with a higher temperature will spontaneously transfer to the cold water. During this process, the heat will be carried away by the cold water, and the air temperature will decrease as it loses heat, achieving a refrigeration effect; if the liquid in the heat exchange tube 21 is a high-temperature liquid, the air will absorb heat from the hot water and the temperature will rise, achieving a heating effect. At the same time, the fan equipped with the fan coil 100 blows the air that has undergone heat exchange into the room, accelerating the circulation of the indoor air and enabling the temperature in each area of the room to be quickly and evenly distributed, thus providing users with a comfortable indoor environment experience.

[0077] In the related art, when the current fan coil 100 shunts and integrates the fluid circulating inside it, a metal water collector is usually used. Multiple outlet branch pipes and inlet branch pipes are bent and welded on the existing metal water collector, and both the outlet branch pipes and the inlet branch pipes (collectively referred to as branch pipes below) are connected to the heat exchanger 20. However, during the bending process, the internal flow channels of the branch pipes are prone to deformation, resulting in a change in the local cross-sectional area and it is no longer uniform. When the circulating fluid flows through the bent part, the flow direction changes frequently, generating turbulent flow. According to fluid mechanics, turbulent flow increases the friction between the fluid and the pipe wall, and the flow resistance increases significantly. This not only reduces the operating efficiency of the fan coil 100, but also brings additional pressure to the air conditioner indoor unit and shortens the service life of the equipment.

[0078] In view of the above defects existing in the existing metal water collector, the present application provides a fan coil 100. Please refer to Figures 1 to 6 , the fan coil 100 further includes a flow distributor 10. The flow distributor 10 includes a housing 1. Among them, the housing 1 has an independent liquid inlet chamber 10a and a liquid outlet chamber 10b, which can be made by an integral molding process or formed by assembling multiple components. For example, the housing 1 includes an upper cover 11 and a lower cover 12, and the lower cover 12 is connected to the upper cover 11. This connection can be at least one of a screw connection, a snap connection, and a magnetic connection, which is a detachable connection, and can also be a welded connection. As long as it can form an independent liquid inlet chamber 10a and a liquid outlet chamber 10b. It can be understood that the above "independent" means that the liquid inlet chamber 10a and the liquid outlet chamber 10b are separated from each other and work independently, ensuring that the liquid flows along the established path.

[0079] Please refer to Figure 6As shown, the housing 1 further includes a partition member 19 disposed inside the housing 1. The partition member 19 may be a flat plate structure, or may be a plate structure in an arc shape, a wave shape, or a broken line shape. In this application, the partition member 19 is not limited. The partition member 19 may be disposed in the internal cavity of the integral housing 1 to divide the internal cavity of the housing 1 into a liquid inlet cavity 10a and a liquid outlet cavity 10b, or may cooperate with the upper cover 11 and the lower cover 12 to configure the liquid inlet cavity 10a and the liquid outlet cavity 10b. It should be noted that the partition member 19 is preferably on one of the upper cover 11 and the lower cover 12, that is, one of the upper cover 11 and the lower cover 12 is integrally formed with the partition member 19, and may also be a separate component. Both the upper cover 11 and the lower cover 12 are provided with partition grooves for fastening the partition member 19.

[0080] To facilitate the centralized connection of multiple heat exchange tubes 21 of the heat exchanger 20 to the housing 1, improve the assembly efficiency and assembly convenience of the fan coil unit 100 and the air conditioner indoor unit, and make the overall structure of the fan coil unit 100 more compact, reducing the space occupancy rate, as Figure 5 and Figure 6 shown, multiple heat exchange tubes 21 are all connected to the same side wall of the housing 1. In the form where the upper cover 11 and the lower cover 12 are assembled to form the housing 1, multiple heat exchange tubes 21 are all inserted into the lower cover 12 of the housing 1. After assembly, the lower bottom surface of the lower cover 12 is close to or abuts against the heat exchanger 20.

[0081] In this embodiment, please refer to Figure 6 shown, the partition member 19 preferably divides the internal space surrounded by the upper cover 11 and the lower cover 12 into a liquid inlet cavity 10a and a liquid outlet cavity 10b in the horizontal direction. At this time, the partition member 19 is disposed perpendicular to the lower bottom surface of the lower cover 12, and the divided liquid inlet cavity 10a and liquid outlet cavity 10b are on the same horizontal height level. In other embodiments, the partition member 19 preferably divides the internal space surrounded by the upper cover 11 and the lower cover 12 into a liquid inlet cavity 10a and a liquid outlet cavity 10b in the vertical direction. It can be understood that the vertical direction is the direction perpendicular to the lower bottom surface of the lower cover 12. At this time, the partition member 19 is disposed parallel to the lower bottom surface of the lower cover 12, and the divided liquid inlet cavity 10a and liquid outlet cavity 10b are stacked and distributed in the vertical direction.

[0082] Furthermore, please refer to Figures 3 to 6As shown, the above-mentioned manifold 10 also includes an inlet joint 3 and an outlet joint 4 provided on the shell 1, wherein the inlet joint 3 is connected to the liquid inlet chamber 10a, and the outlet joint 4 is connected to the liquid outlet chamber 10b. In order to prevent the inlet external pipe connected to the inlet joint 3 and the outlet external pipe connected to the outlet joint 4 from interfering with the installation of the heat exchanger 20, the inlet joint 3 and the outlet joint 4 are both installed on the same side wall of the shell 1, and the side wall on which the inlet joint 3 and the outlet joint 4 are installed is arranged opposite to the side wall on which the plurality of heat exchange tubes 21 are installed. In the form in which the upper cover 11 and the lower cover 12 are assembled to form the shell 1, the inlet joint 3 and the outlet joint 4 are both plugged into the upper cover 11 of the shell 1.

[0083] It should be noted that when the partition 19 divides the internal space enclosed by the upper cover 11 and the lower cover 12 into the liquid inlet chamber 10a and the liquid outlet chamber 10b in the horizontal direction, the upper cover 11 is provided with a water inlet through hole 11a that matches the shape and size of the water inlet joint 3, the water inlet joint 3 is plugged into the water inlet through hole 11a, and the water inlet external pipe will directly connect to the liquid inlet chamber 10a through the water inlet interface 31 of the water inlet joint 3, and the liquid will directly flow through the water inlet interface 31 to fill the liquid inlet chamber 10a. Similarly, the upper cover 11 is also provided with a water outlet through hole 11b that matches the shape and size of the water outlet joint 4, the water outlet joint 4 is plugged into the water outlet through hole 11b, and the water outlet external pipe will directly connect to the liquid outlet chamber 10b through the water outlet interface 41 of the water outlet joint 4, and the liquid collected in the liquid outlet chamber 10b will directly flow through the water outlet interface 41 into the water outlet external pipe.

[0084] When the partition 19 divides the internal space enclosed by the upper cover 11 and the lower cover 12 into a liquid inlet chamber 10a and a liquid outlet chamber 10b along the vertical direction, the flow divider 10 also includes a first flow guide and a second flow guide, wherein the first flow guide is provided with a first flow guide channel, and the second flow guide is provided with a second flow guide channel, wherein the first flow guide is provided in the liquid outlet chamber 10b, and the two ends of the first flow guide are respectively abutted against the partition 19 and the upper cover 11, and the water inlet interface 31 of the water inlet joint 3 is connected to the liquid inlet chamber 10a through the first flow guide channel. In this way, the internal flow channel of the water inlet joint 3 is isolated from the liquid outlet chamber 10b by the first flow guide at the position where it passes through the liquid outlet chamber 10b, and the liquid will flow from the water inlet external pipe through the water inlet interface 31 and the first flow guide in sequence and then fill into the liquid inlet chamber 10a, and it is ensured that the liquid inside the first flow guide channel will not penetrate the liquid inside the liquid outlet chamber 10b.

[0085] The second flow guide is disposed in the liquid inlet chamber 10a, and two ends of the second flow guide are respectively abutted against the partition member 19 and the lower cover 12. The heat exchange tubes 21 are communicated with the liquid outlet chamber 10b through the second flow channels. Thus, the liquid flowing out of the heat exchange tubes 21 can be separated from the liquid in the liquid inlet chamber 10a, so that the liquid inside the second flow channels will not penetrate each other with the liquid inside the liquid inlet chamber 10a, and guide the liquid to pass through the liquid inlet chamber 10a and fill into the liquid outlet chamber 10b, and finally flow into the water outlet external connection pipe through the water outlet interface 41.

[0086] It should be further explained here that the lower chamber of the above-mentioned manifold 10 close to the heat exchanger 20 is configured as the liquid inlet chamber 10a, and the upper chamber on the side facing away from the heat exchanger 20 is configured as the liquid outlet chamber 10b. Therefore, the liquid will flow from the water inlet external connection pipe through the water inlet interface 31 and the first flow channels in sequence and then fill into the liquid inlet chamber 10a, while the liquid flowing out of the heat exchange tubes 21 passes through the liquid inlet chamber 10a through the second flow channels and fills into the liquid outlet chamber 10b. The manifold 10 of the present application can configure the lower chamber close to the heat exchanger 20 as the liquid outlet chamber 10b according to design requirements or structural design, and configure the upper chamber on the side facing away from the heat exchanger 20 as the liquid inlet chamber 10a. At this time, the liquid will first fill into the liquid inlet chamber 10a from the water inlet external connection pipe and flow into the heat exchange tubes 21 after passing through the liquid outlet chamber 10b through the first flow channels, while the liquid flowing out of the heat exchange tubes 21 first fills into the liquid outlet chamber 10b and flows into the water outlet interface 41 of the water outlet joint 4 after passing through the liquid inlet chamber 10a through the second flow channels.

[0087] It can be understood that, please combine Figures 1 to 6 As shown, the manifold 10 is disposed outside the casing and connected to the casing. At this time, the housing 1 of the manifold 10 is inserted and matched with the heat exchange tubes 21 of the heat exchanger 20. When the liquid entering the liquid inlet chamber 10a from the water inlet interface 31 flows into multiple heat exchange tubes 21 at the same time, the purpose of the liquid inlet chamber 10a to divide the liquid into multiple heat exchange tubes 21 is realized. When the liquid flowing out of multiple heat exchange tubes 21 enters the liquid outlet chamber 10b, the purpose of the liquid outlet chamber 10b to collect the liquid of multiple heat exchange tubes 21 is realized.

[0088] Figure 6 The flow path schematic diagram of the manifold 10 is shown, in which the solid arrows represent the flow paths of the liquid flowing through the conduction member 13, and the dashed arrows represent the flow paths of the liquid flowing through the heat exchange tubes 21, and combine Figure 5The liquid flow path shown schematically. The flow distributor 10 further includes a conducting member 13, which includes a first conducting member 131 and a second conducting member 132. The first conducting member 131 is disposed in the liquid inlet chamber 10a and is used to conduct the two heat exchange tubes 21 in the liquid inlet chamber 10a, and the second conducting member 132 is disposed in the liquid outlet chamber 10b and is used to conduct the two heat exchange tubes 21 in the liquid outlet chamber 10b. On the one hand, the conducting member 13 provides a more direct and smooth flow channel for the liquid, reducing or even avoiding the turbulent flow and vortex phenomenon caused by the complex flow path of the liquid in the liquid inlet chamber 10a and the liquid outlet chamber 10b. The liquid can flow more orderly between the heat exchange tubes 21, reducing the local resistance during the flow process, thereby improving the fluid transportation efficiency and reducing the energy loss. On the other hand, by means of the conducting member 13, adjacent two heat exchange tubes 21 are conducted, not only enabling the liquid participating in heat exchange to be more reasonably distributed and flow between different heat exchange tubes 21, avoiding the situation of too large or too small liquid flow rate in some heat exchange tubes 21, so that the heat exchange effect of each heat exchange tube 21 is more uniform. At the same time, it also makes the flow rate and flow volume of the liquid in the heat exchange tube 21 more stable and reasonable, and the contact time and contact area between the liquid and the wall of the heat exchange tube 21 more uniform, which is conducive to the full transfer of heat from the high-temperature side to the low-temperature side. Therefore, under the action of the conducting member 13, it helps to improve the heat exchange efficiency of the entire fan coil unit 100 and reduce the local overheating or overcooling phenomenon caused by uneven heat exchange.

[0089] It should be noted that the above-mentioned conducting member 13 and the heat exchange tube 21 jointly constitute a heat exchange flow path, and the liquid will flow along the extension direction of the heat exchange flow path and exchange heat with the air flowing through the heat exchanger 20. Among them, the first conducting member 131 and the second conducting member 132 cooperate with each other, extremely effectively extending the length of the heat exchange flow path, that is, extending the flow path of the liquid. In this way, it can ensure that the heat exchange process of the liquid is more sufficient and greatly improve the heat exchange effect. In actual design, according to specific design requirements and structural design schemes, the flow distributor 10 can either only configure the first conducting member 131 in the liquid inlet chamber 10a or only configure the second conducting member 132 in the liquid outlet chamber 10b. In addition, in this embodiment, the number of the first conducting member 131 and the second conducting member 132 is not specifically limited, and the number of the first conducting member 131 and the second conducting member 132 can be flexibly set according to actual design requirements to better adapt to the performance requirements under different working conditions.

[0090] It should also be noted that the above-mentioned conducting member 13 is disposed on at least one of the upper cover 11, the lower cover 12 and the partition member 19. In this embodiment, as Figure 5As shown, the conducting member 13 is integrally formed on the inner surface of the upper cover 11. In the region of the liquid inlet chamber 10a, the first conducting member 131 extends from the upper cover 11 towards the lower cover 12. When the upper cover 11 is covered on the lower cover 12, the first conducting member 131 will abut against the lower cover 12 and accurately conduct the ports of the two heat exchange tubes 21. In the region of the liquid outlet chamber 10b, the second conducting member 132 also extends from the upper cover 11 towards the lower cover 12. When the upper cover 11 is covered on the lower cover 12, the second conducting member 132 also abuts against the lower cover 12 and conducts the ports of the two heat exchange tubes 21. Considering that the partition member 19 is arranged perpendicular to the bottom surface of the lower cover 12 and is located above the heat exchange tubes 21. Under this structural layout, when the liquid is to flow into or out of the heat exchange tubes 21, the partition member 19 will impede the flow of the liquid, as Figure 6 shown, the conducting member 13 can also be arranged on the partition member 19. In this way, the two heat exchange tubes 21 located below the partition member 19 are made to communicate with each other, ensuring that the liquid can flow smoothly between the two heat exchange tubes 21 and guaranteeing the smoothness of the liquid flow path in the entire heat exchange system. At the same time, the conducting member 13, as part of the partition member 19, is equivalent to increasing the effective width of the partition member 19. From the perspective of the mechanical structure, a wider partition member 19 has stronger bending and anti-deformation capabilities when resisting external forces. When the partition member 19 faces the impact of liquid pressure, it can better maintain its shape and position with better mechanical structure characteristics, reducing deformations, displacements, etc. caused by pressure impacts, thereby greatly enhancing the structural stability of the entire manifold 10.

[0091] In other embodiments, the conducting member 13 can also be integrally formed on the inner surface of the lower cover 12. The conducting member 13 extends from the lower cover 12 towards the upper cover 11. When the upper cover 11 is covered on the lower cover 12, the conducting member 13 will abut against the upper cover 11 and accurately conduct the two heat exchange tubes 21. Of course, the conducting member 13 can also be arranged only on the partition member 19. For example, the partition member 19 is horizontally arranged, dividing the internal space enclosed by the upper cover 11 and the lower cover 12 into a liquid inlet chamber 10a and a liquid outlet chamber 10b. A first conducting member 131 is extended and arranged on one side of the partition member 19 facing the liquid inlet chamber 10a, and a second conducting member 132 is extended and arranged on one side of the partition member 19 facing the liquid outlet chamber 10b. When the upper cover 11 is covered on the lower cover 12, the first conducting member 131 abuts and fits against the upper cover 11, the second conducting member 132 abuts and fits against the lower cover 12, and both the first conducting member 131 and the second conducting member 132 can communicate with the heat exchange tubes 21, enabling the liquid to flow between the two heat exchange tubes 21 through the conducting member 13. In actual design, according to specific design requirements and structural design schemes, some of the conducting members 13 can be arranged on the upper cover 11, and some of the conducting members 13 can be arranged on the lower cover 12.

[0092] Specifically, please refer to Figure 5As shown, the lower cover 12 of the housing 1 has a plurality of pipe passing openings 12a adapted to the outer diameter of the heat exchange pipes 21. The pipe passing openings 12a are for the heat exchange pipes 21 to pass through and are inserted into the heat exchange pipes 21. To ensure the stability of the connection between the pipe passing openings 12a and the heat exchange pipes 21, an expansion pipe process can be used to seal the connection between the heat exchange pipes 21 and the lower cover 12. The inside of the conducting member 13 is provided with a conducting cavity 133. Along the direction perpendicular to the lower bottom surface of the lower cover 12, the conducting cavity 133 covers two adjacent pipe passing openings 12a, and the two adjacent pipe passing openings 12a communicate with the conducting cavity 133. Among them, the arrangement form of the plurality of pipe passing openings 12a can be: the plurality of pipe passing openings 12a are arranged in a row direction, and the conducting member 13 communicates with two adjacent pipe passing openings 12a in the row direction. Or, the plurality of pipe passing openings 12a are arranged in a column direction, and the conducting member 13 communicates with two adjacent pipe passing openings 12a in the column direction. Or, the plurality of pipe passing openings 12a are arranged in a row direction and also in a column direction. Some of the conducting members 13 communicate with two adjacent pipe passing openings 12a in the row direction, and the remaining conducting members 13 communicate with two adjacent pipe passing openings 12a in the column direction.

[0093] With such an arrangement, in the actual fan coil unit 100, the pipe passing openings 12a and the conducting member 13 can flexibly cope with various layout situations. When the heat exchange pipes 21 are arranged in a simple row direction or column direction, the conducting member 13 can correspondingly communicate with adjacent pipe passing openings 12a in the row direction or column direction to ensure smooth liquid flow between the heat exchange pipes 21. For the heat exchange pipes 21 with a complex row-column mixed arrangement, some of the conducting members 13 communicate in the row direction and some communicate in the column direction, accurately adapting to this complex layout and meeting the liquid conduction requirements in different design scenarios.

[0094] At the same time, by connecting adjacent pipe passing openings 12a through the conducting member 13, the liquid entering the liquid inlet cavity 10a can be more evenly distributed into different heat exchange pipes 21, and the liquid flowing out of different heat exchange pipes 21 can also be more smoothly collected into the liquid outlet cavity 10b. For example, when the heat exchange pipes 21 are arranged in a row direction and the conducting member 13 is connected in the row direction, the liquid can be evenly distributed among the heat exchange pipes 21 in the row direction, ensuring that each heat exchange pipe 21 can work under the optimal flow rate conditions, improving the overall heat exchange efficiency. It also enables the liquid to flow more orderly between the heat exchange pipes 21, reducing the local resistance during the flow process, thereby improving the fluid transportation efficiency, reducing energy loss, and enhancing the operating performance of the entire fan coil unit 100 and the air conditioner indoor unit.

[0095] In addition, connections in the row direction, column direction, or a mixed row-column direction all enhance the connection stability of the housing 1. Under the pressure impact generated by the liquid flow, such a stable partition 19 can better withstand external forces and can more evenly disperse the pressure generated by the liquid acting on the pipeline and the connection parts during the flow process to the entire housing 1, thereby reducing the risk of loosening and detachment of the connection between the housing 1 and the heat exchange tube 21. For example, in the case of a mixed row-column arrangement, the conduction members 13 in different directions work together to disperse the liquid pressure in the row and column directions, avoiding structural damage caused by excessive local stress and further enhancing the stability and reliability of the entire housing 1.

[0096] It should be added that, as shown in Figure 6 When the partition 19 horizontally divides the internal space enclosed by the upper cover 11 and the lower cover 12 into an inlet liquid chamber 10a and an outlet liquid chamber 10b, the direction extending along the long side of the lower cover 12 can be defined as the row direction, and the direction extending along the short side of the lower cover 12 can be defined as the longitudinal direction. When the partition 19 horizontally divides the internal space enclosed by the upper cover 11 and the lower cover 12 into an inlet liquid chamber 10a and an outlet liquid chamber 10b, the row direction is perpendicular to the extension direction of the partition 19 or obliquely intersects with the partition 19, and the column direction is parallel to the extension direction of the partition 19.

[0097] It can be understood that in the case where the partition 19 horizontally divides the internal space enclosed by the upper cover 11 and the lower cover 12 into an inlet liquid chamber 10a and an outlet liquid chamber 10b, the conduction member 13 conducts adjacent two heat exchange tubes 21 in the row direction and / or in the column direction, and uses the heat exchange tube 21 below the partition 19 to guide the liquid on the side of the inlet liquid chamber 10a to the side of the outlet liquid chamber 10b, thereby achieving the purpose that the heat exchange flow path formed by the conduction member 13 and the heat exchange tube 21 connects the inlet liquid chamber 10a and the outlet liquid chamber 10b.

[0098] In addition to the above-mentioned method, as a preferred method of this embodiment, as shown in Figure 6 the flow distributor 10 further includes a cross-connecting conduction member 17. The cross-connecting conduction member 17 penetrates through the partition 19. Specifically, the cross-connecting conduction member 17 is arranged on the partition 19 and integrally formed with the partition 19. The cross-connecting conduction member 17 has a cross-connecting inner cavity 171 inside, and the cross-connecting inner cavity 171 covers two through-orifices 12a on both sides of the partition 19, so that a part of the cross-connecting conduction member 17 is located in the inlet liquid chamber 10a and conducts with one heat exchange tube 21, and the remaining part is located in the outlet liquid chamber 10b and conducts with another heat exchange tube 21. Through such a setting, the following effects can be achieved:

[0099] 1. The conduction member 13 cooperates with the heat exchange tube 21 to guide the liquid from the liquid inlet chamber 10a to the liquid outlet chamber 10b in a relatively indirect manner. The cross-connection conduction member 17 can directly connect the liquid inlet chamber 10a with the liquid outlet chamber 10b, and establish an efficient liquid flow shortcut between the heat exchange tubes 21 on both sides of the partition 19, which greatly simplifies the flow path of the liquid between the liquid inlet and outlet chambers 10b, shortens the heat exchange cycle, and allows more liquid to participate in the heat exchange process per unit time, thereby improving the heat exchange efficiency of the entire fan coil unit 100, thereby facilitating efficient regulation of the indoor temperature.

[0100] 2. The jumper conductor 17 and the separator 19 are integrally formed, which also enhances the structural strength of the separator 19. At this time, the jumper conductor 17 is equivalent to adding additional supporting ribs to the separator 19, reinforcing the separator 19 from multiple directions. When the liquid pressure impacts the separator 19, the jumper conductor 17 can share part of the pressure and disperse it to a wider area. For example, in the direction of liquid flow, the jumper conductor 17 can block and buffer part of the impact force, reducing its direct effect on the local area of ​​the separator 19; perpendicular to the direction of liquid flow, the jumper conductor 17 and the separator 19 jointly resist the pressure difference on both sides, and through structural synergy, the load-bearing capacity of the separator 19 in a complex stress environment is enhanced, and the risk of structural damage such as deformation and rupture of the separator 19 is effectively reduced, thereby greatly enhancing the structural strength of the separator 19 and ensuring the stable operation of the distributor 10.

[0101] 3. After the jumper conductor 17 and the separator 19 are integrally formed, it forms an integral structure that works in coordination with the separator 19. In this structural system, the jumper conductor 17 not only connects the heat exchange tube 21, but also closely connects the heat exchange tube 21 and the separator 19. During the operation of the fan coil 100, the flow of liquid in the heat exchange tube 21 will generate a certain pressure and vibration. The jumper conductor 17 can effectively transfer these forces from the heat exchange tube 21 to the separator 19, and at the same time disperse and buffer these forces with the help of the structural strength of the separator 19. Therefore, this will significantly improve the stability of the jumper part between the two heat exchange tubes 21, thereby effectively ensuring that the liquid can flow continuously and smoothly at the jumper position, ensuring that the heat exchange process of the fan coil 100 is efficient and stable.

[0102] 4. Since the bridging conductor 17 can directly connect the heat exchange tubes 21 on both sides on the separator 19, this makes the layout of the heat exchange tubes 21 more flexible in space. According to the overall structure and actual requirements of the heat exchanger 20, the heat exchange tubes 21 can be arranged more compactly, improving the heat exchange area per unit space, thereby achieving more efficient heat exchange in a limited space. At the same time, the bridging conductor 17 clarifies the conduction path and method between adjacent heat exchange tubes 21, making the arrangement of the heat exchange tubes 21 more regular and orderly. Whether multiple liquid inlet ports 12a are arranged in the row direction, column direction, or both row and column directions, the bridging conductor 17 can connect the corresponding heat exchange tubes 21 according to the established rules, avoiding the chaotic arrangement of the heat exchange tubes 21 caused by complex and diverse connection methods. Such a standardized arrangement order not only facilitates the manufacture and installation of the heat exchanger 20 but also is conducive to later maintenance and repair. The staff can more clearly understand the connection relationship of the heat exchange tubes 21 and the fluid flow direction, improving the maintenance efficiency and reducing the maintenance cost.

[0103] Preferably, as Figure 6 shown, multiple bridging conductors 17 are configured, and multiple conductors 13 are configured in both the liquid inlet chamber 10a and the liquid outlet chamber 10b. The multiple conductors 13, multiple heat exchange tubes 21, and multiple bridging conductors 17 constitute multiple heat exchange channels. One end of each heat exchange channel is connected to the liquid inlet chamber 10a, and the other end is connected to the liquid outlet chamber 10b. This enables the liquid participating in the heat exchange to flow through more paths, fully contact with air or other heat exchange media, greatly increasing the heat exchange area and paths, thereby significantly improving the heat exchange efficiency of the entire heat exchanger 20 and being able to adjust the temperature more quickly and effectively. At the same time, multiple independent heat exchange channels can evenly distribute and flow the liquid between the liquid inlet chamber 10a and the liquid outlet chamber 10b. Each heat exchange channel can relatively independently complete the heat exchange process, avoiding the situation where the liquid is concentrated in a few heat exchange channels, resulting in excessive heat exchange in some areas and insufficient heat exchange in other areas. This helps to make the heat exchange of the entire heat exchanger 20 more uniform, improving the accuracy and stability of temperature control.

[0104] In addition, during the liquid flow process, multiple heat exchange channels can disperse the pressure of the liquid. If there are only a few heat exchange channels, the liquid pressure may be concentrated on this heat exchange channel, causing a large pressure on the heat exchange tubes 21 and increasing the risk of leakage and damage. Multiple heat exchange channels can share the liquid pressure, reducing the pressure borne by each heat exchange channel, thereby reducing the probability of failures caused by excessive pressure and improving the stability and reliability of the fan coil unit 100 and the air conditioner indoor unit.

[0105] It should be supplemented here that please refer to Figure 3 and Figure 4, the upper cover 11 axially protrudes a first protrusion 1131 along the water inlet joint 3, and the first protrusion 1131 extends along the outer peripheral side of the water inlet joint 3, so that the first protrusion 1131 surrounds the water inlet joint 3. The height of the first protrusion 1131 is less than the height of the water inlet joint 3, or the top surface of the first protrusion 1131 is flush with the top surface of the water inlet joint 3. Similarly, the upper cover 11 also axially protrudes a second protrusion 1132 along the water outlet joint 4, and the second protrusion 1132 extends along the outer peripheral side of the water outlet joint 4, so that the second protrusion 1132 surrounds the water outlet joint 4. The height of the second protrusion 1132 is less than the height of the water outlet joint 4, or the top surface of the second protrusion 1132 is flush with the top surface of the water inlet joint 3.

[0106] With such a setting, on the one hand, the first protrusion 1131 and the second protrusion 1132 can effectively increase the sealing contact area between the water inlet joint 3 and the upper cover 11 and between the water outlet joint 4 and the upper cover 11, form a tighter sealing structure, improve the sealing effect, maintain a good sealing state, and prevent liquid from leaking from the connection between the water inlet joint 3 and the upper cover 11 or between the water outlet joint 4 and the upper cover 11.

[0107] On the other hand, the first protrusion 1131 and the second protrusion 1132 can protect the water inlet joint 3 and the water outlet joint 4 from external impact or abrasion to a certain extent, and effectively increase the structural strength and rigidity of the upper cover 11 at the positions of the water inlet joint 3 and the water outlet joint 4. When the device is subjected to external force during installation, handling or use, the first protrusion 1131 and the second protrusion 1132 can absorb part of the impact force, reduce the possibility of direct contact between the water inlet joint 3 and the water outlet joint 4 and the outside world, and thus reduce the risk of damage to the water inlet joint 3 and the water outlet joint 4.

[0108] In addition, when installing the water inlet joint 3 and the water outlet joint 4, the first protrusion 1131 and the second protrusion 1132 can be used as a positioning reference for installation. Installers can more accurately install the joints to the appropriate positions according to the position and shape of the protrusions, ensure the correct relative position between the joints and the upper cover 11, and improve the installation efficiency and accuracy. In addition, the setting of the protrusions also makes it easier to align and install the seal 14.

[0109] As a preferred way of this embodiment, specifically, please refer to Figures 2 to 5As shown in the figure, the liquid distributor further includes an exhaust valve 2. The exhaust valve 2 is provided at the top of the housing 1, that is, the exhaust valve 2 is provided on the upper cover 11 of the housing 1. An exhaust passage is provided inside the exhaust valve 2. An exhaust port 11c is provided on the upper cover 11 of the housing 1. The central axis of the exhaust passage coincides with the exhaust port 11c. The exhaust port 11c can conduct the exhaust passage, enabling the exhaust passage of the exhaust valve 2 to discharge the gas inside the housing 1. The exhaust valve 2 can selectively communicate with the liquid inlet chamber 10a or the liquid outlet chamber 10b. In actual application scenarios, multiple exhaust valves 2 can be configured according to specific requirements. Some of the exhaust valves 2 communicate with the liquid inlet chamber 10a, and the other part communicates with the liquid outlet chamber 10b. One part of the exhaust valves 2 communicates with the liquid inlet chamber 10a, and the other part communicates with the liquid outlet chamber 10b. It should be noted that the exhaust valve 2 belongs to the well-known and mature prior art in the field of technology, so its specific structure will not be described in detail here.

[0110] During the assembly process of the fan coil unit 100, it is necessary to inject liquid to discharge the air inside components such as the heat exchanger 20 in the fan coil unit 100. The exhaust valve 2 can timely discharge the air inside the fan coil unit 100, enabling the liquid to smoothly fill every corner, especially the complex pipe structure inside the heat exchanger 20. If the air is not completely discharged, air resistance will be formed, resulting in the liquid being unable to fully fill the heat exchanger 20, reducing its effective heat exchange area, thereby affecting the heat exchange efficiency, and it is also prone to local overheating or overcooling phenomena. The presence of the exhaust valve 2 ensures that the liquid can be fully filled, enabling the heat exchanger 20 to reach the best working state during the initial operation. At the same time, it can also reduce the content of dissolved oxygen in the liquid, effectively reducing or avoiding the occurrence of cavitation phenomena, extending the service life of the fan coil unit 100, and reducing the later maintenance and replacement costs.

[0111] Preferably, if the exhaust valve 2 communicates with the liquid inlet chamber 10a, the exhaust valve 2 is provided on the periphery of the water inlet joint 3. If the exhaust valve 2 communicates with the liquid outlet chamber 10b, the exhaust valve 2 is provided on the periphery of the water outlet joint 4. In this way, during the installation, debugging, or daily maintenance process, the assembly personnel can easily utilize the intuitive understanding of the positional relationship, reducing the possibility of operation errors caused by misjudgment. Even relatively inexperienced personnel can quickly and accurately identify and operate, playing a good anti-fooling role.

[0112] As a further preferred embodiment, the exhaust valve 2 is a waterproof breathable valve. Please refer to Figures 2 to 5 As shown in the figure, the exhaust valve 2 includes a valve body main body 21, a valve seat 22, and a waterproof breathable membrane. The valve body main body 21 is detachably connected to the housing 1. The waterproof breathable membrane is provided inside the valve body main body 21 for preventing the liquid inside the housing 1 from flowing out and discharging the gas inside the housing 1. The valve seat 22 is fixedly connected to the upper cover 11. The valve body main body 21 is detachably connected to the valve seat 22. This detachable connection can be a crimp connection or a threaded connection.

[0113] In this way, the waterproof breathable membrane can effectively prevent the liquid in the shell 1 from flowing out, avoiding the risk of liquid leakage. At the same time, the waterproof breathable membrane has good air permeability, and the gas accumulated in the shell 1 can be quickly and effectively discharged, ensuring that the gas in the liquid inlet chamber 10a and the liquid outlet chamber 10b is discharged in time, maintaining the pressure balance in the system, and ensuring the smooth flow of liquid in the system. More importantly, the waterproof breathable valve does not require frequent manual operation or adjustment. When the gas pressure in the shell 1 reaches a certain level, the gas can be automatically discharged through the waterproof breathable membrane. This automatic exhaust function reduces manual intervention and reduces the workload of operators. It also avoids the problem of untimely exhaust due to human negligence in not opening the exhaust valve 2 in time, further improving the convenience and reliability of exhaust.

[0114] Furthermore, please combine Figures 3 to 5 As shown, the upper cover 11 is further provided with a third protrusion 1133 along the central axis of the exhaust passage of the exhaust valve 2, the first protrusion 1131, the second protrusion 1132 and the third protrusion 1133 are all located on the same side of the upper cover 11, and the third protrusion 1133 is extended along the peripheral side of the valve seat 22 of the exhaust valve 2, so that the third protrusion 1133 is surrounded by the peripheral side of the valve seat 22. The height of the third protrusion 1133 is less than the height of the valve seat 22, or the top surface of the third protrusion 1133 is flush with the top surface of the valve seat 22.

[0115] In this way, the third protrusion 1133 is closely matched with the valve seat 22, which can provide additional support for the sealing of the exhaust valve 2. Even if the seal 14 is slightly displaced or deformed due to vibration or temperature changes during the operation of the equipment, the third protrusion 1133 can maintain a good sealing state, prevent gas and liquid leakage, and ensure the efficient operation of the exhaust system. At the same time, from the perspective of structural mechanics, the third protrusion 1133 enhances the structural strength of the upper cover 11 at the installation position of the exhaust valve 2. When the fan coil 100 is in operation, the change in internal pressure will generate stress on the exhaust valve 2 and the surrounding structure. The third protrusion 1133 can effectively disperse these stresses, prevent the upper cover 11 from being deformed or damaged in the area around the exhaust valve 2 due to long-term stress, improve the stability and reliability of the entire equipment structure, and ensure the normal operation of the fan coil 100 under complex working conditions. In addition, during the installation of the exhaust valve 2, the third protrusion 1133 provides a clear positioning mark for the installer, which is convenient for accurate installation of the exhaust valve 2 and improves installation efficiency and accuracy.

[0116] It should be noted that the upper cover 11 and the lower cover 12 of the housing 1 can be made of aluminum and aluminum alloy materials. Of course, the upper cover 11 and the lower cover 12 of the housing 1 can also be made of plastic. The above-mentioned water inlet joint 3, water outlet joint 4 and valve seat 22 can be integrally formed with the upper cover 11 by injection molding, die casting and other processes, or the valve seat 22, water inlet joint 3 and water outlet joint 4 can be separate components and can be assembled to the upper cover 11 one by one.

[0117] Considering that the housing 1 made only of aluminum and aluminum alloy materials is prone to corrosion problems. Since there are inevitably components such as dissolved oxygen and chloride ions in water, dissolved oxygen is likely to form a corrosion cell on the surface of aluminum, accelerating the oxidation corrosion of aluminum. Chloride ions have strong penetrability and can damage the originally protective oxide film on the surface of aluminum, exposing the aluminum directly to the corrosive environment and causing local corrosion phenomena such as pitting corrosion and crevice corrosion. Regarding the above problems, the present application further discloses a preferred solution to effectively solve the corrosion problem of the manifold housing 1.

[0118] Specifically, please refer to Figures 7 to 9 , the manifold further includes an upper anti-corrosion shell 16 and a lower anti-corrosion shell. Among them, the upper anti-corrosion shell 16 is at least provided on the inner side of the upper cover 11, and the lower anti-corrosion shell is at least provided on the inner side of the lower cover 12. The upper cover 11 is a metal part, and the lower cover 12 can be a metal part. The metals selected for the upper cover 11 and the lower cover 12 can be the same or different. And the materials of the metal parts include but are not limited to the above-mentioned aluminum and aluminum alloy, and other metal materials such as copper or iron can also be selected according to the structural design and design requirements. In this way, through the cooperation between the upper anti-corrosion shell 16 and the lower anti-corrosion shell, it will be able to provide key protection for solving the corrosion problem of the manifold housing 1 made of aluminum. Further, the upper anti-corrosion shell 16 is closely attached to the inner side of the upper cover 11, and the lower anti-corrosion shell is stably installed on the inner side of the lower cover 12, and together they build a corrosion-resistant liquid inlet chamber 10a and a liquid outlet chamber 10b.

[0119] Specifically, please refer to Figures 7 to 9 , the upper cover 11 includes an upper top wall 111 and an upper side wall 112. Among them, the upper top wall 111 is provided on the top of the upper anti-corrosion shell 16, and the upper top wall 111 is in contact with the top of the upper anti-corrosion shell 16. The upper side wall 112 extends downward from the upper top wall 111 toward the lower cover 12 and encloses at least part of the circumference of the upper anti-corrosion shell 16. This structural design not only enhances the support for the upper anti-corrosion shell 16, making it more stable when bearing the internal liquid pressure, effectively ensuring the overall structural strength and structural stability of the housing 1, and further reducing the influence of the external environment on the internal structure.

[0120] Further, please refer to Figures 7 to 9The upper anti-corrosion shell 16 includes an upper shell body 1611 and an outer convex edge 1612, the outer convex edge 1612 is extended outward from the upper shell body 1611, and the upper side wall 112 surrounds the circumference of the upper shell body 1611 and extends to the outer convex edge 1612. In this embodiment, the outer convex edge 1612 is preferably located on a side of the upper shell body 1611 close to the lower anti-corrosion shell, that is, the outer convex edge 1612 is located at the opening edge of the upper shell body 1611, and the outer convex edge 1612 is extended along the circumference of the upper shell body 1611.

[0121] Among them, the outer convex edge 1612 provides a wider installation contact surface for the upper anti-corrosion shell 16. During the installation process, the upper side wall 112 of the upper cover 11 extends to the outer convex edge 1612 and cooperates with it, so that the connection between the upper anti-corrosion shell 16 and the upper cover 11 is tighter and firmer, ensuring that it can better resist the vibration and external force impact generated during the operation of the fan coil 100, and prevent the upper anti-corrosion shell 16 from being displaced or loosened during use. At the same time, the outer convex edge 1612, as an extension of the upper shell body 1611, can work with the upper shell body 1611 when subjected to force, and jointly withstand the influence of internal liquid pressure and external environmental factors. This overall structure not only improves the strength and rigidity of the upper anti-corrosion shell 16, but also enables it to better maintain its shape and performance stability when facing complex working conditions. It can be understood that the above-mentioned water inlet through hole 11a and water outlet through hole 11b both pass through the upper anti-corrosion shell 16 and the upper cover 11 to ensure the smooth flow of the liquid inlet path and the liquid outlet path. When liquid flows into the liquid inlet cavity 10a through the water inlet hole 11a, the upper anti-corrosion shell 16 can effectively prevent the liquid from directly contacting the aluminum material of the upper cover 11, and also prevent the liquid from directly contacting the aluminum material of the lower cover 12 to cause corrosion reaction, thereby avoiding corrosion of the upper cover 11 by dissolved oxygen, chloride ions and other components in the liquid. The multiple pipe ports 12a also penetrate the lower cover 12, and the lower anti-corrosion shell is provided with multiple liquid holes 144, and each liquid hole 144 is connected to the corresponding pipe port 12a. The heat exchange tube 21 is connected to the liquid inlet cavity 10a and the liquid outlet cavity 10b through the pipe port 12a and the liquid hole 144, so that the liquid can enter the heat exchange tube 21.

[0122] Preferably, please refer to Figure 9As shown, the conducting member 13 and the bridging conducting member 17 are disposed on at least one of the upper anti-corrosion shell 16, the lower anti-corrosion shell, and the partition member 19, ensuring that the conducting member 13 and the bridging conducting member 17 have good anti-corrosion performance themselves. Preferably, the conducting member 13 extends downward from the upper anti-corrosion shell 16. When the lower cover 12 is installed in place, the conducting member 13 precisely abuts against the lower anti-corrosion shell and conducts the ports of the two heat exchange tubes 21. With its anti-corrosion material, the risk of corrosion caused by contact with liquid is avoided throughout the process. The bridging conducting member 17 penetrates through the partition member 19 and is integrally formed with the partition member 19. Its bridging inner cavity 171 covers the liquid passing ports 12a on both sides of the partition member 19. The bridging conducting member 17 is partially located in the liquid inlet cavity 10a and conducts with one heat exchange tube 21, and the remaining part is located in the liquid outlet cavity 10b and conducts with the other heat exchange tube 21, and it can also effectively resist corrosion itself. This structure not only ensures the orderly flow of liquid between the heat exchange tubes 21, but also, due to its anti-corrosion performance, eliminates the corrosion risk caused by the contact of the conducting member 13 and the bridging conducting member 17 with liquid, greatly improving the corrosion resistance of the manifold, ensuring its long-term stable operation under complex working conditions, effectively extending the service life of the manifold and the fan coil unit 100, and ensuring the efficient and stable operation of the entire air conditioner indoor unit.

[0123] Further, the lower anti-corrosion shell includes a lower shell main body 1621 and an outer extension portion 1622. The outer extension portion 1622 extends outward from the lower shell main body 1621 and abuts against the outer convex edge 1612. A plurality of the above-mentioned liquid passing holes 144 are provided on the lower shell main body 1621. Preferably, the lower anti-corrosion shell serves as the seal member 14 of the manifold 10. Specifically, the lower anti-corrosion shell serves as the upper seal portion 141 of the seal member 14 to seal the gap between the upper cover 11 and the lower cover 12.

[0124] With such a setting, the outer extension portion 1622 will closely abut against the above-mentioned outer convex edge 1612, not only forming a reliable sealing line of defense between the two. When the water or refrigerant inside the manifold 10 flows, this sealing structure can effectively prevent liquid from leaking from the connection between the upper and lower anti-corrosion shells, avoiding liquid from contacting the external aluminum material, thereby significantly improving the overall anti-corrosion performance. At the same time, it also enables the upper anti-corrosion shell 16 and the lower anti-corrosion shell to support each other at the connection, enhancing the stability of the entire anti-corrosion structure. During the operation of the fan coil unit 100, even if the internal fluid pressure fluctuates, or the device is subjected to external force impact due to vibration, this abutting structure can better disperse the stress, prevent displacement or deformation between the upper anti-corrosion shell 16 and the lower anti-corrosion shell, ensure the stable structure of the entire manifold 10, and maintain normal operation.

[0125] It should be noted that the lower anti-corrosion shell, as the seal 14 of the flow distributor 10, can also have at least a part of the seal 14 clamped between the upper cover 11 and the lower cover 12, that is, the upper cover 11 abuts against the seal 14, which can also ensure the sealing performance when the upper cover 11 and the lower cover 12 are closed. The upper anti-corrosion shell 16 and the lower anti-corrosion shell can be made of polytetrafluoroethylene material. In addition, the upper anti-corrosion shell 16 and the lower anti-corrosion shell can also be made of rubber material.

[0126] As a further preferred embodiment, please refer to Figures 7 to 9 , the seal 14 further includes an inner-hole sealing portion 142. The inner-hole sealing portion 142 extends from the lower shell body 1621 towards the inner side of the pipe passing hole 12a, and the inner-hole sealing portion 142 is arranged in a sleeve shape on the hole wall of the pipe passing hole 12a. The inner-hole sealing portion 142 is used for interference fit with the part of the heat exchange tube 21 passing through the pipe passing hole 12a, so as to form a highly reliable sealing barrier between the heat exchange tube 21 and the pipe passing hole 12a, which will effectively prevent the liquid from seeping out from the gap between the heat exchange tube 21 and the pipe passing hole 12a, avoid the liquid leakage to the outside of the flow distributor 10, thus ensuring the normal operation of the system and reducing the performance degradation and maintenance cost caused by leakage.

[0127] In addition, the inner-hole sealing portion 142 plays a certain role in supporting and positioning the heat exchange tube 21 in the pipe passing hole 12a. During the operation of the fan coil unit 100, when the internal fluid generates pressure fluctuations or the equipment is vibrated, the shaking of the heat exchange tube 21 can be reduced, and the structural damage caused by the friction and collision between the heat exchange tube 21 and the pipe passing hole 12a can be avoided.

[0128] As a further preferred embodiment, please refer to Figure 10 shown, the seal 14 further includes a lower sealing portion 143. The inner-hole sealing portion 142 extends towards the inner side of the pipe passing hole 12a and protrudes from the pipe passing hole 12a. The lower sealing portion 143 is arranged on the lower surface of the lower cover 12 and is connected to the inner-hole sealing portion 142. The upper sealing portion 141, the inner-hole sealing portion 142, and the lower sealing portion 143 are preferably integrally formed. After the assembly of the fan coil unit 100 is completed, the lower sealing portion 143 will be clamped between the lower cover 12 and the heat exchanger 20.

[0129] It should be added that, please refer to Figures 7 to 9 , in this embodiment, the upper cover 11 is convexly formed on the side facing away from the upper anti-corrosion shell 16 with the above-mentioned first protrusion 1131 for embedding the water inlet joint 3 and the second protrusion 1132 for embedding the water outlet joint 4. Similarly, the upper cover 11 is convexly arranged along the central axis of the exhaust passage of the exhaust valve 2 and towards the side facing away from the upper anti-corrosion shell 16 to form the above-mentioned third protrusion 1133.

[0130] When considering that the upper cover 11 and the lower cover 12 of the housing 1 are made of plastic, during the operation of the fan coil unit 100, the manifold 10 is subjected to the pressure impact of the liquid inside, with frequent and large-amplitude pressure fluctuations. In this case, it is difficult for the upper cover 11 and the lower cover 12 made of plastic to withstand the continuous pressure, and deformation is likely to occur. Moreover, the vibration generated during the operation of the fan coil unit 100 will also cause continuous mechanical stress on the manifold 10. Under the long-term vibration effect, the structural strength of the plastic manifold 10 gradually decreases, further exacerbating the deformation problem and even possibly causing cracks. In view of the above problems, the present application further discloses another preferred solution to solve the problem of low structural strength of the manifold made of plastic.

[0131] Please refer to Figures 11 to 13 , the housing 1 includes a plastic part 151 and a reinforcing member 152, and the reinforcing member 152 is embedded in the plastic part 151. Among them, the reinforcing member 152 can be made of high-strength metal materials such as stainless steel and aluminum alloy, or high-performance composite materials such as carbon fiber. These reinforcing members 152 have excellent mechanical properties and can significantly make up for the shortcoming of the plastic material in terms of strength. When dealing with the pressure impact of the liquid, the reinforcing member 152, relying on its own high-strength characteristics, bears most of the pressure load. When the high-pressure liquid flows in the manifold 10 and generates a pressure impact, the reinforcing member 152 is like a solid skeleton, dispersing the pressure and effectively preventing the plastic part 151 from suffering local depression or bulging deformation due to excessive pressure.

[0132] When facing the continuous vibration generated during the operation of the fan coil unit 100, the reinforcing member 152 is closely combined with the plastic part 151 to jointly resist the mechanical stress. The presence of the reinforcing member 152 enhances the rigidity of the entire housing 1 and reduces the impact of vibration on the plastic part 151. Under the long-term vibration effect, the reinforcing member 152 can effectively inhibit the decrease in the structural strength of the plastic part 151 and prevent cracks caused by vibration fatigue. For example, the reinforcing member 152 made of continuous fiber-reinforced composite material is laid along the stress direction of the plastic part 151, which can greatly improve the fatigue resistance of the plastic part 151 in the vibration environment and ensure the structural stability of the housing 1 under the long-term vibration working conditions.

[0133] Specifically, please refer to Figures 11 to 13 , at least one of the above upper cover 11 and lower cover 12 includes a plastic part 151. That is, in one case, both the upper cover 11 and the lower cover 12 include a plastic part 151, and in one case, only one of the upper cover 11 and the lower cover 12 includes a plastic part 151, and the upper cover 11 and the lower cover 12 are made of other materials. The structure and related characteristics of the upper cover 11 including the plastic part 151 will be elaborated in detail below.

[0134] The upper cover 11 is provided with an upper embedding groove 115 on one side facing downwards the lower cover 12. The shape and size of the upper embedding groove 115 are precisely adapted to those of the reinforcing member 152. The upper embedding groove 115 can be formed as an upper notch only in the direction perpendicular to the top surface of the upper cover 11, or the upper embedding groove 115 can penetrate at least one side of the upper cover 11 along the length of the groove to form a side notch for the reinforcing member 152 to be embedded inside the upper embedding groove 115. The surface of the upper embedding groove 115 and / or the circumferential side surface of the reinforcing member 152 are specially treated to have a certain roughness, thereby enhancing the friction force with the reinforcing member 152 to ensure that the reinforcing member 152 can be stably embedded in the upper embedding groove 115. Of course, processes such as hot pressing and injection molding are used to closely integrate the reinforcing member 152 with the plastic part 151 of the upper cover 11 to form a firm structure. It can be understood that in the direction perpendicular to the top surface of the upper cover 11, the reinforcing member 152 covers at least part of the liquid inlet cavity 10a and at least part of the liquid outlet cavity 10b. Further, both the water outlet joint 4 and the water outlet joint 4 are fixedly connected to the reinforcing member 152. The connection method here can be welding, riveting, bolt connection, or threaded connection, etc.

[0135] In this way, the reinforcing member 152 will be able to be more conveniently and accurately embedded into the upper embedding groove 115. At the same time, the reinforcing member 152 is closely integrated with the plastic part 151 of the upper cover 11 to form a firm structure. This close integration enables the reinforcing member 152 and the plastic part 151 to work better together, jointly bear the load when subjected to external forces, effectively improving the overall structural strength and anti-deformation ability of the upper cover 11, enabling it to better cope with the pressure impact and vibration generated during the operation of the fan coil unit 100.

[0136] Preferably, as Figure 13 shown, the upper cover 11 further includes an outer sealing layer 114. The outer sealing layer 114 is provided on the side of the reinforcing member 152 facing away from the lower cover 12 to seal the upper notch of the upper embedding groove 115 in the direction perpendicular to the top surface of the upper cover 11, and the outer sealing layer 114 abuts and fits against the reinforcing member 152, so that the reinforcing member 152 is clamped between the outer sealing layer 114 and the groove wall of the upper embedding groove 115. The outer sealing layer 114 is fixedly connected to other parts of the upper cover 11. The fixed connection here can be selected as integral molding, or can also be selected to be connected and fixed by fasteners (such as bolts, screws, studs, rivets, etc.), or can also be selected as snap connection. During the process of installing the reinforcing member 152 into the upper embedding groove 115, it is only necessary to insert the reinforcing member 152 into the upper embedding groove 115 from the side notch. It should be added that the outer sealing layer 114 can be made of the same material as the plastic part 151, or can also be made of a material different from the plastic part 151.

[0137] With such a setting, since the outer seal layer 114 seals the upper notch, it can effectively prevent the reinforcement member 152 from being exposed outside, avoiding the erosion of the reinforcement member 152 by external environmental factors such as dust, moisture, and corrosive gases, thereby prolonging the service life of the reinforcement member 152 and ensuring the continuity of its enhancement of the structural strength. At the same time, the presence of the outer seal layer 114 makes the surface of the upper cover 11 smoother, improving the overall aesthetics of the product. In addition, it further enhances the structural stability of the upper cover 11, which is beneficial for the manifold 10 to withstand the mechanical stress generated by the liquid pressure impact and the equipment vibration.

[0138] It should be noted that the outer seal layer 114 can be convexly provided along the central axis of the water inlet joint 3 and toward the side away from the reinforcement member 152 to form the above-mentioned first protrusion 1131, and the first protrusion 1131 surrounds the periphery of the water inlet joint 3. It is also possible to convexly provide the reinforcement member 152 along the central axis of the water inlet joint 3 and toward the side away from the reinforcement member 152 to form the above-mentioned first protrusion 1131. When the outer seal layer 114 is configured, the first protrusion 1131 can extend out of the outer seal layer 114 or be flush with the outer side surface of the outer seal layer 114.

[0139] Similarly, the outer seal layer 114 can be convexly provided along the central axis of the water outlet joint 4 and toward the side away from the reinforcement member 152 to form the above-mentioned second protrusion 1132, and the second protrusion 1132 surrounds the periphery of the water outlet joint 4. It is also possible to convexly provide the reinforcement member 152 along the axis of the water outlet joint 4 to have the second protrusion 1132. When the outer seal layer 114 is configured, the second protrusion 1132 can extend out of the outer seal layer 114 or be flush with the outer side surface of the outer seal layer 114.

[0140] In addition, the outer seal layer 114 can be convexly provided along the central axis of the internal exhaust passage of the exhaust valve 2 and toward the side away from the reinforcement member 152 to form the above-mentioned third protrusion 1133, and the third protrusion 1133 surrounds the periphery of the water outlet joint 4. It is also possible to convexly provide the reinforcement member 152 along the central axis of the exhaust passage and toward the side away from the reinforcement member 152 to form the third protrusion 1133. When the outer seal layer 114 is configured, the second protrusion 1132 can extend out of the outer seal layer 114 or be flush with the outer side surface of the outer seal layer 114.

[0141] In this embodiment, the above-mentioned water inlet through-hole 11a, water outlet through-hole 11b, and exhaust port 11c all penetrate through the plastic part 151 and the reinforcing member 152 of the upper cover 11. When the fan coil unit 100 is operating, the liquid flows into the liquid inlet cavity 10a at a high speed through the water inlet through-hole 11a. Due to its high-strength characteristics, the reinforcing member 152 effectively disperses the pressure generated by the liquid impact, preventing the plastic part 151 from deforming or cracking due to excessive pressure around the water inlet through-hole 11a, and ensuring a stable and unobstructed water inlet path. When the liquid is discharged from the water outlet through-hole 11b, the acting force generated by the change in its flow rate and pressure on the upper cover 11 is resisted by the reinforcing member 152, maintaining the structural stability of the upper cover 11, preventing local deformation caused by the liquid outflow, and ensuring a smooth water discharge process.

[0142] Preferably, the inner wall of the interface of the water inlet interface 31 is flush with the inner hole wall of the water inlet through-hole 11a on the inner side of the housing 1, and the inner wall of the interface of the water outlet interface 41 is flush with the inner hole wall of the water outlet through-hole 11b on the inner side of the housing 1. The term "flush" here should be understood as that the aperture of the water inlet through-hole 11a on the inner side of the housing 1 is equal to the caliber of the water inlet interface 31, or the aperture of the water inlet through-hole 11a on the inner side of the housing 1 is greater than the caliber of the water inlet interface 31 within the assembly tolerance range. Similarly, the aperture of the water outlet through-hole 11b on the inner side of the housing 1 is slightly larger than the caliber of the water outlet interface 41, or the aperture of the water outlet through-hole 11b on the inner side of the housing 1 is slightly larger than the caliber of the water outlet interface 41 within the assembly tolerance range.

[0143] In this way, it not only ensures that the liquid can enter the internal space of the housing 1 more smoothly and stably, reduces the flow resistance and turbulent flow phenomenon caused by the aperture change or the misalignment between the interface and the through-hole, improves the fluid transportation efficiency, and helps the fan coil unit 100 system to operate more efficiently. At the same time, it also reduces the dead corners and eddy current areas generated during the fluid flow, reduces the possibility of impurities and corrosive substances in the fluid accumulating in these areas, thereby reducing the corrosion risk to the internal structure of the upper cover 11 and improving the corrosion resistance and reliability of the system.

[0144] It should be noted that when the conducting member 13 and the cross-connecting conducting member 17 are formed on the upper cover 11, both of them are integral parts of the plastic part 151, and together with the plastic part 151 and the reinforcing member 152 of the upper cover 11, they constitute a complete structural system to jointly ensure the stable operation of the fan coil unit 100.

[0145] In addition, the aforementioned lower cover 12 may further include a plastic part 151. The structure and related characteristics of the lower cover 12 including the plastic part 151 will be elaborated in detail below. Specifically, a lower embedding groove is provided on the side of the lower cover 12 facing away from the lower cover 12. The shape and size of the lower embedding groove are precisely adapted to the shape and size of the reinforcing member 152. And a lower notch facing the heat exchanger 20 can be opened in the direction perpendicular to the bottom surface of the lower cover 12 in the lower embedding groove, or the lower embedding groove can penetrate at least one side of the lower cover 12 along the length of its groove to form a lower side opening for the reinforcing member 152 to be embedded inside the lower embedding groove. In this way, the reinforcing member 152 will be able to be more conveniently and accurately embedded into the lower embedding groove. At the same time, the reinforcing member 152 and the plastic part 151 of the lower cover 12 are tightly combined into one body to form a firm structure. This tight combination enables the reinforcing member 152 and the plastic part 151 to work better together, share the load jointly when bearing external forces, effectively improving the overall structural strength and anti-deformation ability of the lower cover 12, enabling it to better cope with the pressure impact and vibration generated during the operation of the fan coil unit 100.

[0146] When the aforementioned lower cover 12 is installed on the heat exchanger 20, the reinforcing member 152 directly abuts against the heat exchanger 20. Or, the reinforcing member 152 embedded in the lower embedding groove fits with the lower sealing part 143 of the sealing member 14. In addition to this method, the lower cover 12 further includes a bottom sealing layer. The bottom sealing layer is provided on the side of the reinforcing member 152 facing away from the upper cover 11 to seal the lower notch in the direction perpendicular to the bottom surface of the lower cover 12 of the lower embedding groove, and the outer sealing layer 114 abuts and fits with the reinforcing member 152, so that the reinforcing member 152 is clamped between the bottom sealing layer and the groove wall of the lower embedding groove, and the bottom sealing layer is fixedly connected to other parts of the lower cover 12. The fixed connection here can be integrally formed, or can be connected and fixed by using fasteners (such as bolts, screws, studs, rivets, etc.), or can also be a snap connection. During the process of installing the reinforcing member 152 into the lower embedding groove, it is only necessary to insert the reinforcing member 152 into the lower embedding groove from the lower side opening. It should be added that the bottom sealing layer can be made of the same material as the plastic part 151, or can also be made of a material different from the plastic part 151.

[0147] At this time, the bottom sealing layer of the lower cover 12 directly abuts against the heat exchanger 20. This can avoid situations such as abrasion and corrosion that may occur when the reinforcing member 152 directly contacts the heat exchanger 20, contribute to protecting the performance of the reinforcing member 152 and the overall structural integrity of the lower cover 12, and extend its service life.

[0148] It can be understood that the above-mentioned pipe passing opening 12a penetrates through the plastic part 151 and the reinforcing member 152 of the lower cover 12. The reinforcing member 152 is embedded around the peripheral area of the pipe passing opening 12a, playing a key strengthening role in the position where the pipe passing opening 12a is located. When the fan coil unit 100 operates, the liquid enters and exits through the pipe passing opening 12a, which will generate a certain pressure on the lower cover 12. At this time, with its own high strength, the reinforcing member 152 effectively disperses the pressure brought by the liquid flow, preventing the plastic part 151 from deforming or cracking due to excessive pressure around the pipe passing opening 12a, ensuring the structural stability at the pipe passing opening 12a, guaranteeing the smooth flow of the liquid through this place, avoiding liquid leakage caused by the structural damage of the pipe passing opening 12a, and maintaining the normal operation of the fan coil unit 100 system.

[0149] Furthermore, in this application, considering that during the operation of the air conditioner indoor unit, the surface temperature of the heat exchanger 20 is relatively low, and the water vapor in the air near the heat exchanger 20 will condense into water droplets when encountering cold. And the condensed water droplets flow randomly, which may drip onto other components of the air conditioner indoor unit, such as electrical components, motors, etc., resulting in component damage due to moisture, affecting the normal operation and service life of the air conditioner.

[0150] Regarding the above existing problems, please refer to Figure 1 , the air conditioner indoor unit further includes a water receiving tray 200. The water receiving tray 200 is arranged at the bottom of the heat exchanger 20, and extends out of the casing on the side close to the flow distributor 10, so that the upward projection of the water receiving tray 200 can cover the flow distributor 10. This setting enables the condensed water droplets to flow towards the water receiving tray 200 under the action of gravity, facilitating the rapid drainage of the condensed water droplets from the air conditioner indoor unit. Since the flow distributor 10 is within the coverage range of the water receiving tray 200, the condensed water flowing down from the heat exchanger 20 can drain away more smoothly through the water receiving tray 200, reducing the accumulation or backflow of condensed water inside the machine, and improving the drainage efficiency and reliability. In this way, even in a situation with high environmental humidity, the possibility of condensation occurring due to the contact between the outer surface of the casing and the cold flow distributor 10 can be reduced, keeping the appearance of the air conditioner indoor unit clean and dry, and enhancing the user experience.

[0151] It should be noted that the heat exchanger 20 further includes an upper side plate 20a and a lower side plate 20b. Among them, the upper side plate 20a is arranged on the side of the heat exchanger 20 close to the flow distributor 10, and the lower side plate 20b is arranged on the side of the heat exchanger 20 facing away from the flow distributor 10. The heat exchanger 20 is installed and fixed to the casing of the air conditioner indoor unit through the upper side plate 20a and the lower side plate 20b. Preferably, the lower cover 12 of the above-mentioned housing 1 can be used as the upper side plate 20a, which can not only reduce the processes and materials for separately designing and manufacturing the upper side plate 20a, making the structure of the air conditioner indoor unit more compact and concise. At the same time, it is also convenient for positioning and installation, reducing the adjustment and alignment work during the assembly process, lowering the assembly difficulty, and thus effectively improving the assembly accuracy and efficiency.

[0152] The above is the explanation of the manifold 10 proposed in the embodiments of the present application. Since the fan coil unit 100 and the air conditioner indoor unit proposed in the embodiments of the present application both adopt all the technical solutions of the above-mentioned all embodiments, they at least have all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0153] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation to the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0154] The above is only the preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A liquid distributor, characterized in that, Applied to an air conditioner indoor unit, the air conditioner indoor unit includes a heat exchanger, the heat exchanger includes a plurality of liquid inlet pipes and a plurality of liquid outlet pipes, and the liquid distributor includes: A housing having independent liquid inlet and outlet chambers, the liquid inlet chamber being configured to distribute liquid to the plurality of liquid inlet pipes, and the liquid outlet chamber being configured to collect the liquid from the plurality of liquid outlet pipes; and An exhaust valve provided at the top of the housing and communicating with the liquid inlet chamber and / or the liquid outlet chamber.

2. The liquid distributor with diversity as described in claim 1, wherein It further includes: A water inlet connector provided on the housing and communicating with the liquid inlet chamber; A water outlet connector provided on the housing and communicating with the liquid outlet chamber; Wherein, the exhaust valve communicates with the liquid inlet chamber, and the exhaust valve is provided on the periphery of the water inlet connector, and / or, the exhaust valve communicates with the liquid outlet chamber, and the exhaust valve is provided on the periphery of the water outlet connector.

3. The manifold as claimed in claim 1 or 2, wherein The exhaust valve includes: A valve body main body detachably connected to the housing; A waterproof breathable membrane provided inside the valve body main body for preventing the liquid in the housing from flowing out and discharging the gas in the housing.

4. The manifold as claimed in claim 1 or 2, wherein The housing further includes: An upper cover including a plastic part and a reinforcing member embedded in the plastic part; A lower cover connected to the upper cover; and, A partition member provided on the upper cover or the lower cover and cooperating with the upper cover and the lower cover to define the liquid inlet chamber and the liquid outlet chamber; Wherein, the exhaust valve is fixedly connected to the reinforcing member.

5. The manifold as claimed in claim 4, wherein, An upper clamping groove is provided on the side of the upper cover facing away from the lower cover, and the reinforcing member is embedded inside the upper clamping groove.

6. The manifold as claimed in claim 5, wherein, The upper cover further includes: An outer sealing layer provided on the side of the reinforcing member facing away from the lower cover and abutting against the reinforcing member.

7. The liquid distributor as claimed in claim 6, wherein An exhaust passage is provided inside the exhaust valve for discharging the gas in the housing; One of the outer sealing layer and the reinforcing member protrudes along the central axis of the exhaust passage and towards the side away from the reinforcing member to form a third protrusion, and the third protrusion surrounds the periphery of the exhaust valve.

8. The manifold as claimed in claim 1 or 2, wherein The housing includes: An upper cover, which is a metal part; An upper anti-corrosion shell provided at least on the inner side of the upper cover; A lower cover connected to the upper cover; and A lower anti-corrosion shell provided at least on the inner side of the lower cover and defining independent liquid inlet and outlet chambers with the upper anti-corrosion shell; Wherein, the exhaust valve is provided on the upper cover.

9. The manifold as claimed in claim 8, wherein, The upper cover includes: An upper top wall provided on the top of the upper anti-corrosion shell; An upper side wall extending from the upper top wall towards the lower cover side and surrounding at least part of the periphery of the upper anti-corrosion shell.

10. The sub-header as claimed in claim 9, wherein The upper anti-corrosion shell includes: An upper shell main body; and, An outer convex edge extending towards the outside from the upper shell main body; Wherein, the upper side wall surrounds the periphery of the upper shell main body and extends to the outer convex edge.

11. The sub-header as claimed in claim 8, wherein An exhaust passage is provided inside the exhaust valve for discharging the gas in the housing; The upper cover protrudes along the central axis of the exhaust passage and towards the side away from the upper anti-corrosion shell to form the third protrusion, and the third protrusion surrounds the periphery of the exhaust valve.

12. A fan coil unit, characterized in that, It includes: The liquid distributor according to any one of claims 1 to 11; A heat exchanger having a plurality of heat exchange tubes inside, and a plurality of the heat exchange tubes are inserted into the housing.

13. The fan coil unit according to claim 12, wherein the heat exchanger further comprises: A lower side plate disposed on a side of the heat exchanger facing away from the flow distributor for being fixedly mounted on a housing of an indoor air conditioner.

14. An air conditioner indoor unit, characterized in that, Comprising: The fan coil unit according to claim 12 or 13; A housing, wherein the heat exchanger is disposed in the housing and connected to the housing, the flow distributor is disposed outside the housing, and the flow distributor is connected to the housing.

15. The air conditioner indoor unit according to claim 14, characterized in that, Further comprising: A water receiving tray disposed at a bottom of the heat exchanger, and extending out of the housing at a side close to the flow distributor such that an upward projection of the water receiving tray can cover the flow distributor.

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