Liquid distributing and collecting device, fan coil, air conditioner indoor unit and heating and ventilation system

Abstract

The invention discloses a liquid distributing and collecting device, a fan coil, an air conditioner indoor unit and a heating and ventilation system.The liquid distributing and collecting device is applied to the air conditioner indoor unit, the air conditioner indoor unit comprises a heat exchanger, the heat exchanger comprises a heat exchange pipe, and the liquid distributing and collecting device comprises a shell and a sealing piece; 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 the heat exchange tubes, the liquid outlet cavity is used for collecting the liquid of the heat exchange tubes, the shell is provided with a plurality of tube passing holes, the tube passing holes are communicated with the liquid inlet cavity and the liquid outlet cavity respectively, and the tube passing holes are communicated with the liquid inlet cavity and the liquid outlet cavity respectively. The heat exchange tube is arranged in the heat exchange tube in a penetrating manner; and the sealing piece is at least arranged on the hole wall of the pipe passing hole, and the sealing piece is used for being in interference fit with the part, penetrating through the pipe passing hole, of the heat exchange pipe. According to the technical scheme, the structure of the water dividing and collecting device can be simplified, and therefore installation efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of heating, ventilation and air conditioning (HVAC) equipment, and particularly to a manifold, a fan coil unit, an air conditioner indoor unit, and an HVAC system. Background Art

[0002] Currently, as the terminal equipment of an HVAC system, an air conditioner indoor unit is mainly used to adjust the temperature, humidity, and cleanliness of indoor air. Among them, the fan coil unit in the air conditioner indoor unit is widely used in places such as hotels, office buildings, and hospitals due to its compact structure and various installation methods. Among them, the manifold in the fan coil unit, as a core component, mainly distributes the cold water or hot water transmitted in the HVAC system to the indoor heat exchanger, and then the indoor heat exchanger exchanges heat with the indoor air.

[0003] In related technologies, when a fan coil unit shunts and integrates the fluid circulating inside it, a metal water collecting head is usually used. Multiple outlet branch pipes and inlet branch pipes are bent and welded on the existing metal water collecting head, and then both the outlet branch pipes and the inlet branch pipes (collectively referred to as branch pipes below) are connected to the heat exchanger. The complex pipeline connections formed by multiple branch pipes require additional space to be reserved. During installation, on-site welding or assembly is required, and the pipeline orientation and connection angle need to be adjusted multiple times. This not only increases the installation time but also easily leads to installation errors, and it is extremely inconvenient during the installation process with the indoor heat exchanger, resulting in a low overall installation efficiency. Summary of the Invention

[0004] Embodiments of this application provide a manifold, a fan coil unit, an air conditioner indoor unit, and an HVAC system, which can achieve

[0005] In a first aspect, embodiments of this application provide a manifold. This manifold is applied to an air conditioner indoor unit, and the air conditioner indoor unit includes a heat exchanger, and the heat exchanger includes heat exchange tubes. The manifold includes a housing and a seal; the housing has an independent liquid inlet chamber and a liquid outlet chamber. The liquid inlet chamber is used to shunt liquid to a plurality of the heat exchange tubes, and the liquid outlet chamber is used to collect the liquid of a plurality of the heat exchange tubes. The housing has a plurality of tube passing holes, and the plurality of tube passing holes are respectively communicated with the liquid inlet chamber and the liquid outlet chamber, and are used for the heat exchange tubes to pass through them; the seal is at least arranged on the hole wall of the tube passing holes, and the seal is used for interference fit with the part of the heat exchange tube passing through the tube passing holes.

[0006] In some of these embodiments, the seal includes:

[0007] An inner-hole seal part, arranged in a sleeve shape on the hole wall of the tube passing hole, and the inner-hole seal part surrounds the circumferential side of the heat exchange tube.

[0008] In some of these embodiments, the housing includes:

[0009] Upper cover; and

[0010] Lower cover, connected to the upper cover and having the pipe-through hole;

[0011] The seal further includes:

[0012] Upper sealing portion, disposed between the upper cover and the lower cover and connected to the in-hole sealing portion to seal the gap between the upper cover and the lower cover, and together with the upper cover to define the liquid inlet chamber and the liquid outlet chamber; the upper sealing portion is provided with a plurality of liquid through holes, and the liquid through holes are in one-to-one correspondence and communication with the pipe-through hole.

[0013] In some embodiments, the seal includes:

[0014] Lower sealing portion, disposed on the lower surface of the lower cover and connected to the in-hole sealing portion.

[0015] In some embodiments, a receiving groove is provided on the lower surface of the lower cover, and the lower sealing portion is embedded in the receiving groove.

[0016] In some embodiments, the lower sealing portion covers the lower surface of the lower cover.

[0017] In some embodiments, the upper sealing portion, the in-hole sealing portion and the lower sealing portion are an integral member.

[0018] In some embodiments, the seal is a rubber part or a plastic part.

[0019] In some embodiments, it further includes:

[0020] Conducting member, disposed in the liquid inlet chamber and used to conduct the two heat exchange tubes in the liquid inlet chamber, and / or disposed in the liquid outlet chamber and used to conduct the two heat exchange tubes in the liquid outlet chamber; and

[0021] Partition member, disposed 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;

[0022] Wherein, the conducting member is disposed on at least one of the upper cover, the lower cover and the partition member.

[0023] In some embodiments, the partition member divides the internal space enclosed by the upper cover and the lower cover into the liquid inlet chamber and the liquid outlet chamber along the horizontal direction or the vertical direction.

[0024] In some embodiments, the conducting member includes:

[0025] A first conducting member, disposed in the liquid inlet chamber, for conducting the two heat exchange tubes; and

[0026] A second conducting member, disposed in the liquid outlet chamber, for conducting the two heat exchange tubes.

[0027] In some embodiments, the plurality of tube passing holes are arranged in a row direction, and the conducting member communicates with two adjacent tube passing holes along the row direction; or,

[0028] The plurality of tube passing holes are arranged in a column direction, and the conducting member communicates with two adjacent tube passing holes along the column direction; or,

[0029] The plurality of tube passing holes are arranged in a row direction and in a column direction. Some of the conducting members communicate with two adjacent tube passing holes along the row direction, and the remaining conducting members communicate with two adjacent tube passing holes along the column direction.

[0030] In some embodiments, the partition member divides the internal space enclosed by the upper cover and the lower cover into the liquid inlet chamber and the liquid outlet chamber in a horizontal direction, and the column direction is parallel to the extending direction of the partition member.

[0031] In a second aspect, an embodiment of the present application provides a fan coil unit, which includes:

[0032] A liquid distributor as described in any one of the above; and

[0033] A heat exchanger, including a plurality of heat exchange tubes, each of the heat exchange tubes is provided with a perforated section, and the perforated sections are inserted into the tube passing holes in a one-to-one correspondence and are in interference fit with the sealing members.

[0034] In some embodiments, the heat exchange tube includes one of a copper tube, an aluminum tube, and a flexible stainless steel tube.

[0035] In a third aspect, an embodiment of the present application provides an air conditioner indoor unit, which includes:

[0036] The fan coil unit as described in any one of the above;

[0037] A housing, the liquid distributor and the heat exchanger are both disposed in the housing; and

[0038] A water receiving tray, disposed in the housing and located below the heat exchanger and the liquid distributor.

[0039] In a fourth aspect, an embodiment of the present application provides a heating, ventilation and air conditioning (HVAC) system, which includes:

[0040] The air conditioner indoor unit as described above; and

[0041] The outdoor unit of the air conditioner is connected to the indoor unit of the air conditioner through pipelines.

[0042] Based on the liquid distributor according to the embodiment of the present application, the housing has a plurality of pipe passing holes. The plurality of pipe passing holes are respectively communicated with the liquid inlet cavity and the liquid outlet cavity, and are used for the heat exchange pipes to pass through, so as to realize the rapid installation of the heat exchange pipes and the housing. The plurality of pipe passing holes can be in one-to-one butt joint with the heat exchange pipes, improving the accuracy of installation positioning, thereby ensuring that each heat exchange pipe can obtain sufficient liquid flow, and ensuring the uniform flow of liquid in each heat exchange pipe, avoiding problems such as reduced heat exchange efficiency, local overheating or overcooling caused by uneven flow. At the same time, through the butt joint and cooperation between the pipe passing holes and the heat exchange pipes, it is avoided that in the prior art, a plurality of branch pipes are arranged on the liquid distributor to be butt-jointed with the heat exchange pipes, simplifying the structure of the liquid distributor, avoiding installation steps such as welding between the heat exchange pipes and the housing, and greatly improving the installation efficiency.

[0043] Moreover, the sealing member is at least arranged on the hole wall of the pipe passing hole. The sealing member is used for interference fit with the part of the heat exchange pipe passing through the pipe passing hole. With such a setting, during the installation of the liquid distributor and the heat exchanger, welding treatment is not required. Instead, through the radial extrusion when the heat exchange pipe is inserted, an interference fit seal is formed with the sealing member. In the case of having a plurality of heat exchange pipes, the one-to-one butt joint positioning and welding processing of the plurality of heat exchange pipes are avoided, simplifying the manufacturing process of the liquid distributor while reducing the processing cost and operation threshold, providing reliable sealing performance, and thus greatly improving the production and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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 to be used 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.

[0045] Figure 1 It is a schematic assembly structure diagram of an embodiment of the fan coil unit of the present application;

[0046] Figure 2 It is a partial assembly structure diagram of the first perspective of the fan coil unit of the present application;

[0047] Figure 3 It is a partial assembly structure diagram of the second perspective of the fan coil unit of the present application;

[0048] Figure 4 It is a schematic exploded structure diagram of an embodiment of the liquid distributor of the present application;

[0049] Figure 5 For Figure 3Schematic cross-sectional structure diagram of the fan coil unit at A-A as shown;

[0050] Figure 6 is Figure 5 the enlarged view of the part at B shown in

[0051] Figure 7 is Figure 5 the schematic structural diagram of the seal shown in

[0052] Figure 8 is Figure 4 the schematic top view structure diagram of the liquid distributor shown in

[0053] Figure 9 is Figure 8 the schematic cross-sectional view at C-C in

[0054] Figure 10 is the flow path schematic diagram of the liquid distributor of the present application.

[0055] Explanation of the reference numerals in the drawings:

[0056] 100, fan coil unit; 10, liquid distributor; 1, housing; 10a, liquid inlet chamber; 10b, liquid outlet chamber; 11, upper cover; 11a, water inlet through hole; 11b, water outlet through hole; 111, upper top wall; 112, upper side wall; 12, lower cover; 12a, pipe passing hole; 121, receiving groove; 13, conducting member; 131, first conducting member; 132, second conducting member; 133, conducting inner cavity; 14, seal; 141, upper sealing portion; 142, inner hole sealing portion; 143, lower sealing portion; 144, liquid passing hole; 17, bridging conducting member; 171, bridging inner cavity; 19, separating member; 2, exhaust valve; 3, water inlet joint; 31, water inlet interface; 4, water outlet joint; 41, water outlet interface;

[0057] 20, heat exchanger; 21, heat exchange tube; 211, perforated section; 22, upper side plate; 23, lower side plate;

[0058] 200, water receiving tray; 300, machine shell.

[0059] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0060] To make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0061] 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 embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods that are consistent with some aspects of the present application as detailed in the appended claims.

[0062] In the description of the present application, it should be understood that the terms "first", "second", etc. 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 the present application can be understood according to specific circumstances. In addition, in the description of the present 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: 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.

[0063] 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.

[0064] Heat pump technology is an energy-saving technology that can efficiently utilize low-grade energy. As an environmentally friendly and efficient energy conversion device, it has attracted much attention and has great development potential, and has broad application prospects in the fields of building heating, industrial waste heat utilization, new energy, etc. At present, as the terminal equipment of the HVAC system, the air conditioner indoor unit cools or heats the air through the fan passing through the heat exchanger, and can be used to adjust the temperature, humidity and cleanliness of the indoor air, providing a comfortable environment for the indoor. Among them, the fan coil unit (FCU, Fan Coil Unit) in the air conditioner indoor unit is widely used in hotels, office buildings, hospitals and other places due to its compact structure and various installation methods.

[0065] Generally, the air conditioner indoor unit includes a housing and a fan coil unit installed on the housing. As one of the core components of the air conditioner indoor unit, the main function of the fan coil unit is to adjust the temperature of the indoor air through heat exchange and promote the air circulation. Specifically, the fan coil unit includes a fan and a heat exchanger arranged in the housing. The inside of the heat exchanger has a plurality of heat exchange tubes arranged closely. The heat exchanger is arranged in the housing and is connected to the housing (such as screw connection, snap connection or welding connection).

[0066] When the liquid (water or refrigerant) circulating inside the air conditioner indoor unit flows through the heat exchange tubes, the heat exchange tubes will exchange heat with the indoor air flowing over their surfaces. If the liquid flowing inside the heat exchange tubes is at a low temperature, when the indoor air passes over the surfaces of the heat exchange tubes, according to the principle of heat transfer, the heat of the indoor air at 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 inside the heat exchange tubes is at a high temperature, the air will absorb heat from the hot water and its temperature will increase, achieving a heating effect. At the same time, the fan equipped with the fan coil 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, thereby providing users with a comfortable indoor environment experience.

[0067] In the related art, currently, when a fan coil divides 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. 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 but also brings additional pressure to the air conditioner indoor unit and shortens the service life of the equipment.

[0068] In addition, the complex pipeline connections formed by multiple branch pipes require additional space to be reserved, affecting the overall layout efficiency. During installation, on-site welding or assembly is required, increasing the construction difficulty and time cost. When installing multiple branch pipes, the pipeline orientation and connection angles need to be adjusted multiple times, which not only increases the installation time but also easily leads to installation errors. In addition, during the installation process, it is necessary to ensure the sealing of each interface, and the sealing difficulty is relatively large, seriously affecting the installation efficiency, and it is also extremely inconvenient during the installation process with the indoor heat exchanger, and the overall installation efficiency is low.

[0069] To solve the above problems, please refer to Figures 1 to 4 , this application proposes a liquid distributor 10, which is applied to an air conditioner indoor unit. Among them, the air conditioner indoor unit includes a heat exchanger 20, and the heat exchanger 20 includes heat exchange tubes 21. In the embodiment of this application, the liquid distributor 10 includes a housing 1 and a seal 14.

[0070] The housing 1 can be made of plastic, aluminum, stainless steel, etc., and has high strength and corrosion resistance. The housing 1 has an independent liquid inlet chamber 10a and a liquid outlet chamber 10b. The liquid inlet chamber 10a is used to divert the liquid to a plurality of the heat exchange tubes 21, and the liquid outlet chamber 10b is used to collect the liquid of the plurality of heat exchange tubes 21. It should be noted that the liquid can be a refrigerant, a coolant, etc. In an embodiment of the present application, the liquid is water, and after flowing through the heat exchange tubes 21, the water can exchange heat with the indoor air.

[0071] The housing 1 of the technical solution of the present application has a plurality of tube passing holes 12a, and the plurality of tube passing holes 12a are respectively communicated with the liquid inlet chamber 10a and the liquid outlet chamber 10b, and are used for the heat exchange tubes 21 to pass through therein, realizing the rapid installation of the heat exchange tubes 21 and the housing 1. The plurality of tube passing holes 12a can be in one-to-one docking with the heat exchange tubes 21, improving the accuracy of installation positioning, so as to ensure that each heat exchange tube 21 can obtain sufficient liquid flow, and ensure the uniform flow of the liquid in each heat exchange tube 21, avoiding problems such as reduced heat exchange efficiency, local overheating or overcooling caused by uneven flow. At the same time, by docking and matching the tube passing holes 12a with the heat exchange tubes 21, it avoids the setting of multiple branch pipes on the collector in the prior art to be docked with the heat exchange tubes 21, simplifies the structure of the collector, and avoids installation steps such as welding between the heat exchange tubes 21 and the housing 1, greatly improving the installation efficiency.

[0072] Moreover, the seal 14 is at least arranged on the hole wall of the tube passing hole 12a, and the seal 14 is used for interference fit with the part of the heat exchange tube 21 passing through the tube passing hole 12a. With this setting, during the installation process of the liquid collector 10 and the heat exchanger 20, instead of using the welding treatment in the prior art, an interference fit seal is formed between the heat exchange tube 21 and the seal 14 through the radial extrusion during the insertion of the heat exchange tube 21. In the case of having a plurality of heat exchange tubes 21, it eliminates the need for one-to-one docking positioning and welding processing of the plurality of heat exchange tubes 21. While simplifying the manufacturing process of the liquid collector 10, it reduces the processing cost and operation threshold, provides reliable sealing performance, and thus greatly improves the production and installation efficiency.

[0073] It is understandable that the seal 14 is a rubber or plastic part, which has a certain elasticity, and is moisture-proof, corrosion-resistant, aging-resistant and sealing, and can better adapt to the working environment of the manifold. The elastic seal 14 can also compensate for the slight size deviation between the heat exchange tube 21 and the tube hole 12a, reduce the fine requirements for processing accuracy, and reduce rework caused by size deviation, thereby effectively reducing the production and manufacturing costs, and then improve the production and installation efficiency. During the installation process of the manifold and the heat exchanger 20, the seal 14 can be squeezed with the heat exchange tube 21 to achieve an interference fit. At the same time, the elastic deformation ability of the seal 14 can also prevent the heat exchange tube 21 from being deformed by excessive extrusion stress, affecting the flow path effect, and at the same time adapt to the outer peripheral wall shape of different heat exchange tubes 21 to provide a variety of application scenarios to meet the different needs of users.

[0074] In some embodiments, the seal 14 includes an in-hole sealing portion 142, which is arranged in a sleeve shape on the hole wall of the tube hole 12a, and the in-hole sealing portion 142 is wrapped around the circumference of the heat exchange tube 21, that is, the in-hole sealing portion 142 is completely covered on the hole wall of the tube hole 12a to increase the contact area between the part of the tube wall of the heat exchange tube 21 passing through the tube hole 12a and the in-hole sealing portion 142, thereby ensuring the connection strength of the interference fit and eliminating the risk of local leakage. The elastic material of the in-hole sealing portion 142 is evenly compressed to ensure consistent sealing force in all directions, avoiding micro-leakage caused by bias pressure, and the in-hole sealing portion 142 can absorb vibration energy during equipment operation, compensate for the thermal expansion and contraction deformation of the hole wall of the tube hole 12a and the heat exchange tube 21, maintain sealing stability, and thus greatly improve the sealing performance.

[0075] It should be noted that in another embodiment of the present application, the in-hole sealing portion 142 may not completely cover the hole wall of the tube hole 12a, but only exist on part of the hole wall of the tube hole 12a, that is, the heat exchange tube 21 is passed through the tube hole 12a, and the in-hole sealing portion 142 is wrapped around at least part of the circumference of the heat exchange tube 21 and has an interference fit with part of the tube wall of the heat exchange tube 21. In this way, the material of the in-hole sealing portion 142 can be reduced to save costs while ensuring installation efficiency and sealing performance.

[0076] In some embodiments, the housing 1 may be an integral component formed by welding, casting, or the like, or may be a split-type arrangement. In the structural form where the housing 1 is a split-type arrangement, the housing 1 includes an upper cover 11 and a lower cover 12. The lower cover 12 is connected to the upper cover 11 and has a pipe-passing hole 12a. A plurality of pipe-passing holes 12a are provided through the lower cover 12. The upper cover 11 serves as a top closure, and necessary components of the liquid distributor 10 such as a water inlet interface 31 and a water outlet interface 41 may be provided thereon. The above components may be provided on the upper top wall 111 or the upper side wall 112 of the upper cover 11 to facilitate the connection of the water inlet interface 31 and the water outlet interface 41 to the liquid inlet chamber 10a and the liquid outlet chamber 10b, respectively.

[0077] Among them, the upper cover 11 and the lower cover 12 may be connected by a detachable form such as screwing or clamping. Of course, they may also be integrally connected by welding or the like after being separately cast during production. Moreover, the materials of the upper cover 11 and the lower cover 12 may be the same or different. For example, the upper cover 11 and the lower cover 12 may be made of any one of copper, aluminum, stainless steel, or plastic, etc. Of course, they may also be made of one of the materials respectively. The present application does not limit this.

[0078] Please refer to Figures 4 to 7 , the seal 14 further includes an upper seal portion 141. The upper seal portion 141 is provided between the upper cover 11 and the lower cover 12 and is connected to the in-hole seal portion 142 to seal the gap between the upper cover 11 and the lower cover 12, and together with the upper cover 11, defines the liquid inlet chamber 10a and the liquid outlet chamber 10b. The upper seal portion 141 is provided with a plurality of liquid-passing holes 144. The liquid-passing holes 144 are in one-to-one correspondence and communication with the pipe-passing holes 12a. The liquid-passing holes 144 can ensure the directional flow of the liquid, ensure that the liquid flows inside the liquid distributor 10 along a predetermined path, avoid cross-flow, so that after the heat exchange tube 21 passes through the pipe-passing hole 12a, the liquid in the heat exchange tube 21 can flow into the liquid outlet chamber 10b, or the liquid in the liquid inlet chamber 10a can flow into the heat exchange tube 21 to form a stable circulating heat exchange flow path to meet the flow requirements of the equipment during operation.

[0079] In an embodiment of the present application, the upper seal portion 141 may be provided on the upper surface of the lower cover 12. After the upper cover 11 and the lower cover 12 are connected, the upper seal portion 141 can be sealed between the upper cover 11 and the lower cover 12 to ensure the sealing performance. Moreover, the upper seal portion 141 can be connected to the in-hole seal portion 142. In addition, the seal 14 further includes a lower seal portion 143. The lower seal portion 143 is provided on the lower surface of the lower cover 12 and is connected to the in-hole seal portion 142. The lower seal portion 143 can be used to seal the other part of the hole wall of the heat exchange tube 21 that passes through the pipe-passing hole 12a and is exposed on the upper surface of the lower cover 12, which can further enhance the sealing effect of the liquid distributor 10 and prevent the liquid from leaking from the lower surface of the lower cover 12.

[0080] With such a setting, the upper sealing portion 141 and the lower sealing portion 143 are tightly connected to the inner-hole sealing portion 142, enabling the entire seal 14 to comprehensively seal the gaps between the upper cover 11 and the lower cover 12 and the lower surface of the lower cover 12, thereby improving the overall sealing performance of the liquid distributor 10.

[0081] Moreover, during the installation process, when the heat exchange tube 21 is inserted into the through-hole 12a, in the axial direction of the through-hole 12a, the tube wall of the heat exchange tube 21 may interfere with the inner-hole sealing portion 142 arranged in a sleeve shape on the hole wall of the through-hole 12a, causing the flexible inner-hole sealing portion 142 to shift and deform, thus affecting the sealing effect. The installation stability of the heat exchange tube 21 will also be affected accordingly. Workers need to make repeated adjustments during installation, which affects the installation efficiency. Also, during the insertion of the heat exchange tube 21, due to the relative reverse movement of the outer wall surface of the heat exchange tube 21 and the inner-hole sealing portion 142 in the axial direction, there are opposite frictional forces, which easily cause the inner-hole sealing portion 142 to curl and deform upwards. Therefore, the lower sealing portion 143 is arranged on the lower surface of the lower cover 12 and connected to the inner-hole sealing portion 142. One end of the inner-hole sealing portion 142 close to the lower surface of the lower cover 12 is directly connected to the lower sealing portion 143 on the lower surface of the lower cover 12, avoiding the displacement and deformation caused by the interference between the heat exchange tube 21 and the lower end of the inner-hole sealing portion 142, and effectively improving the installation efficiency.

[0082] The upper sealing portion 141, the inner-hole sealing portion 142, and the lower sealing portion 143 are integral components. The three can be integrally formed by injection molding or compression molding processes, eliminating the risk of joint leakage. At the same time, it is convenient for production and manufacturing, and the installation efficiency is relatively high. Under complex working conditions such as temperature changes, pressure fluctuations, or equipment vibrations, the tight cooperation between the upper sealing portion 141, the lower sealing portion 143, and the inner-hole sealing portion 142 can maintain stable sealing, ensuring the reliable operation of the liquid distributor 10 in a harsh environment. Of course, the upper sealing portion 141, the inner-hole sealing portion 142, and the lower sealing portion 143 can also be separately arranged and connected by methods such as dispensing. In this way, when one of the three components is damaged, the damaged component can be separately removed and replaced, reducing the maintenance and replacement cost.

[0083] In the structural form where the upper sealing portion 141, the inner-hole sealing portion 142, and the lower sealing portion 143 are integral components, the materials of the three can be rubber or plastic. It can be understood that in the structural form where the upper sealing portion 141, the inner-hole sealing portion 142, and the lower sealing portion 143 are separately arranged, the materials of the three can be the same or, of course, different. Since the lower sealing portion 143 is relatively closer to the lower heat exchanger 20 below, the lower sealing portion 143 can also be made of materials with higher pressure resistance or corrosion resistance. This application does not limit this.

[0084] However, the heat exchange tube 21 passes through the tube passing hole 12a and is connected to the header 10, realizing welding-free installation. The hole section of the tube passing hole 12a needs to have a certain length to better support the heat exchange tube 21, and the lower cover 12 needs to have a certain thickness. Therefore, in this application, an upper sealing portion 141 and a lower sealing portion 143 are provided, which are respectively arranged on the upper surface and the lower surface of the lower cover 12, replacing a part of the thickness of the lower cover 12. This not only thins the thickness of the lower cover 12 and reduces the production and manufacturing costs, but also the upper sealing portion 141 and the lower sealing portion 143 cover the part of the hole wall of the heat exchange tube 21 exposed outside the tube passing hole 12a, which can also provide high tightness, with high installation efficiency and cost savings.

[0085] Furthermore, a receiving groove 121 is provided on the lower surface of the lower cover 12, and the lower sealing portion 143 is embedded in the receiving groove 121. This can effectively prevent liquid or gas from leaking through the gap on the lower surface of the lower cover 12, ensuring that the liquid will not accidentally leak during the heat exchange process and maintaining the normal operation of the equipment. During the operation of the indoor unit of the air conditioner, slight vibrations may occur due to the rotation of the fan or the impact of the water flow. The lower sealing portion 143 is embedded in the receiving groove 121, which can better adapt to this vibration and possible slight displacement, maintain the stability of the seal, and avoid leakage problems caused by seal failure. At the same time, embedding the lower sealing portion 143 in the receiving groove 121 makes full use of the space of the lower cover 12, avoiding excessive external space occupied by additional sealing components, further thinning the design of the housing 1, so that the structure of the entire header 10 is more compact, with a smaller volume, and is more convenient to install and use in a limited space.

[0086] The lower sealing portion 143 covers the lower surface of the lower cover 12 to isolate the lower cover 12 from the heat exchanger 20 below, effectively avoiding the influence of the heat exchange temperature of the heat exchanger 20 on the header 10, and having a better sealing effect; it can be understood that the lower sealing portion 143 can also at least surround a part of the hole wall of the heat exchange tube 21 exposed on the lower surface of the lower cover 12, reducing materials while ensuring tightness to save costs.

[0087] In some embodiments, 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.

[0088] 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 Figures 2 to 4 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.

[0089] In this embodiment, please refer to Figures 8 to 10 , 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.

[0090] Furthermore, 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.

[0091] 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.

[0092] 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.

[0093] The second flow guide member is disposed in the liquid inlet chamber 10a, and both ends of the second flow guide member 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 guide channels. In this way, 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 guide channels will not penetrate each other with the liquid inside the liquid inlet chamber 10a, and the liquid is guided to pass through the liquid inlet chamber 10a and fill into the liquid outlet chamber 10b, and finally flows into the water outlet external connection pipe through the water outlet interface 41.

[0094] Here, it should be supplemented and explained that the lower chamber of the above-mentioned manifold 10 disposed on the side 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 sequentially flow through the water inlet interface 31 and the first flow guide channel from the water inlet external connection pipe and then fill into the liquid inlet chamber 10a, while the liquid flowing out of the heat exchange tubes 21 passes through the second flow guide channel through the liquid inlet chamber 10a and fills into the liquid outlet chamber 10b. The manifold 10 of the present application can configure the lower chamber disposed on the side close to the heat exchanger 20 as the liquid outlet chamber 10b according to design requirements or structural design, and the upper chamber on the side facing away from the heat exchanger 20 is configured 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 guide channel, while the liquid flowing out of the heat exchange tubes 21 first fills into the liquid outlet chamber 10b and then 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 guide channel.

[0095] It can be understood that, please combine Figure 4 、 Figures 8 to 10 , the manifold 10 is disposed outside the housing 300 and is connected to the housing 300. 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 a plurality of heat exchange tubes 21 at the same time, the purpose of the liquid inlet chamber 10a to distribute the liquid to a plurality of heat exchange tubes 21 is achieved. When the liquid flowing out of a plurality of heat exchange tubes 21 enters the liquid outlet chamber 10b, the purpose of the liquid outlet chamber 10b to collect the liquid of a plurality of heat exchange tubes 21 is achieved.

[0096] Figure 10 shows a schematic flow path diagram of the manifold 10, wherein the solid arrows represent the flow paths of the liquid flowing through the conduction member 13, the dashed arrows represent the flow paths of the liquid flowing through the heat exchange tubes 21, and in combination with Figure 9The liquid flow path shown. The distributor 10 also includes a conductive member 13, which includes a first conductive member 131 and a second conductive member 132. The first conductive member 131 is arranged in the liquid inlet chamber 10a and is used to connect the two heat exchange tubes 21 in the liquid inlet chamber 10a, and the second conductive member 132 is arranged in the liquid outlet chamber 10b and is used to connect the two heat exchange tubes 21 in the liquid outlet chamber 10b. On the one hand, the conductive member 13 provides a more direct and smooth flow channel for the liquid, reducing or even avoiding the turbulence and eddy current 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 between the heat exchange tubes 21 in a more orderly manner, reducing the local resistance during the flow process, thereby improving the fluid transportation efficiency and reducing energy loss. On the other hand, the conduction between two adjacent heat exchange tubes 21 is achieved through the conduction piece 13, which not only allows the liquid involved in the heat exchange to be more reasonably distributed and flowed between different heat exchange tubes 21, but also avoids the situation where the liquid flow in some heat exchange tubes 21 is too large or too small, thereby making the heat exchange effect of each heat exchange tube 21 more uniform and consistent. At the same time, it also makes the flow rate and flow rate 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 tube wall of the heat exchange tube 21 are 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 conduction piece 13, it helps to improve the heat exchange efficiency of the entire fan coil 100 and reduce the local overheating or overcooling caused by uneven heat exchange.

[0097] It should be noted that the above-mentioned conductive member 13 and the heat exchange tube 21 are jointly constructed to form a heat exchange flow channel, and the liquid will flow along the extension direction of the heat exchange flow channel and exchange heat with the air flowing through the heat exchanger 20. Among them, the first conductive member 131 and the second conductive member 132 cooperate with each other, which effectively extends the length of the heat exchange flow channel, that is, extends the flow path of the liquid. In this way, it can be ensured that the heat exchange process of the liquid is more sufficient, and the heat exchange effect is greatly improved. In actual design, according to specific design requirements and structural design schemes, the sub-collector 10 can be configured with the first conductive member 131 only in the liquid inlet chamber 10a, and can also be configured with the second conductive member 132 only in the liquid outlet chamber 10b. In addition, in this embodiment, the number of the first conductive member 131 and the second conductive member 132 is not specifically limited, and the number of the first conductive member 131 and the second conductive member 132 can be flexibly set according to actual design requirements to better adapt to the performance requirements under different working conditions.

[0098] 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, 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 to 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 to 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 disposed 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 block the flow of the liquid. As Figure 10 shown, the conducting member 13 can also be disposed on the partition member 19. In this way, the two heat exchange tubes 21 located below the partition member 19 are mutually conducted, 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 a 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 resistance and anti-deformation ability when resisting external forces. When facing the impact of liquid pressure, the partition member 19 can better maintain its own shape and position with better mechanical structure characteristics, reducing deformations, displacements, etc. caused by pressure impact, thereby greatly enhancing the structural stability of the entire manifold 10.

[0099] 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 to 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 only disposed on the partition member 19. For example, the partition member 19 is horizontally disposed, 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 disposed on one side of the partition member 19 facing the liquid inlet chamber 10a, and a second conducting member 132 is extended and disposed 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 disposed on the upper cover 11, and some of the conducting members 13 can be disposed on the lower cover 12.

[0100] Specifically, please refer to Figure 9 As shown, a conduction cavity 133 is provided inside the conduction member 13. Along the direction perpendicular to the lower bottom surface of the lower cover 12, the conduction cavity 133 covers two adjacent pipe holes 12a, and the two adjacent pipe holes 12a are communicated with the conduction cavity 133. Among them, the arrangement form of the multiple pipe holes 12a can be: the multiple pipe holes 12a are arranged along the row direction, and the conduction member 13 communicates with two adjacent pipe holes 12a along the row direction. Or, the multiple pipe holes 12a are arranged along the column direction, and the conduction member 13 communicates with two adjacent pipe holes 12a along the column direction. Or, the multiple pipe holes 12a are arranged along the row direction and along the column direction, and some of the conduction members 13 communicate with two adjacent pipe holes 12a along the row direction, and the remaining conduction members 13 communicate with two adjacent pipe holes 12a along the column direction.

[0101] With such a setting, in the actual fan coil unit 100, the settings of the pipe holes 12a and the conduction 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 conduction member 13 can correspondingly communicate with the adjacent pipe holes 12a along the row direction or column direction to ensure smooth flow of the liquid between the heat exchange pipes 21. For the heat exchange pipes 21 with a complex row-column mixed arrangement, some of the conduction members 13 communicate along the row direction and some communicate along the column direction, accurately adapting to this complex layout and meeting the liquid conduction requirements under different design scenarios.

[0102] At the same time, by connecting the adjacent pipe holes 12a through the conduction 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 along the row direction and the conduction member 13 is connected along 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 best flow conditions, improving the overall heat exchange efficiency, and also enabling 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 the energy loss, and enhancing the operating performance of the entire fan coil unit 100 and the air conditioner indoor unit.

[0103] 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 liquid flow, this stable partition 19 can better withstand external forces and can more evenly disperse the pressure generated by the liquid during flow on the pipeline and the connection parts of the pipeline 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.

[0104] It should be added that, according to Figure 10 As shown, 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 column 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 intersects the partition 19 obliquely, and the column direction is parallel to the extension direction of the partition 19.

[0105] 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.

[0106] In addition to the above-mentioned method, as a preferred method of this embodiment, according to Figure 10 As shown, 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 is integrally formed with the partition 19. The inside of the cross-connecting conduction member 17 is provided with a cross-connecting inner cavity 171, and the cross-connecting inner cavity 171 covers two pipe holes 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.

[0107] The way the conducting member 13 cooperates with the heat exchange tube 21 to guide the liquid from the liquid inlet cavity 10a to the liquid outlet cavity 10b is relatively indirect. The bridging conducting member 17 can directly connect the liquid inlet cavity 10a and the liquid outlet cavity 10b, establishing an efficient liquid flow shortcut between the heat exchange tubes 21 on both sides of the partition member 19, greatly simplifying the liquid flow path between the liquid inlet and outlet cavities 10b, shortening the heat exchange cycle, enabling more liquid to participate in the heat exchange process per unit time, improving the heat exchange efficiency of the entire fan coil unit 100, and thus facilitating the efficient regulation of the indoor temperature.

[0108] A plurality of bridging conducting members 17 are configured, and a plurality of conducting members 13 are also configured in both the liquid inlet cavity 10a and the liquid outlet cavity 10b. The plurality of conducting members 13, the plurality of heat exchange tubes 21, and the plurality of bridging conducting members 17 constitute a plurality of heat exchange channels. One end of each heat exchange channel communicates with the liquid inlet cavity 10a, and the other end communicates with the liquid outlet cavity 10b. This allows the liquid participating in the heat exchange to flow through more paths, making full 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 enabling more rapid and effective temperature regulation. At the same time, the plurality of independent heat exchange channels can evenly distribute and flow the liquid between the liquid inlet cavity 10a and the liquid outlet cavity 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 and improve the accuracy and stability of temperature control.

[0109] In addition, during the liquid flow process, the plurality of heat exchange channels can disperse the liquid pressure. If there are only a few heat exchange channels, the liquid pressure may be concentrated on this heat exchange channel, causing a relatively large pressure on the heat exchange tube 21 and increasing the risk of leakage and damage. However, the plurality of 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.

[0110] In some embodiments, please refer back to Figures 8 to 10, the liquid collector 10 also includes an exhaust valve 2, which is arranged on the top of the shell 1, that is, the exhaust valve 2 is arranged on the upper cover 11 of the shell 1, and an exhaust channel is arranged inside the exhaust valve 2, and an exhaust port 11c is arranged on the upper cover 11 of the shell 1. The central axis of the exhaust channel coincides with the exhaust port 11c, and the exhaust port 11c can conduct the exhaust channel, so that the exhaust channel of the exhaust valve 2 can exhaust the gas in the shell 1, and the exhaust valve 2 can selectively communicate with the liquid inlet chamber 10a or the liquid outlet chamber 10b. In actual application scenarios, the exhaust valve 2 can be configured as multiple according to specific needs, and some exhaust valves 2 are connected to the liquid inlet chamber 10a, and the other part is connected to the liquid outlet chamber 10b. One part of the exhaust valve 2 is connected to the liquid inlet chamber 10a, and the other part is connected to the liquid outlet chamber 10b. It should be noted that the exhaust valve 2 belongs to the mature existing technology well known to those skilled in the art, so its specific structure will not be described in detail here.

[0111] like Figures 1 to 4 During the assembly process of the fan coil unit 100, liquid needs to be injected to exhaust the air in the components of the fan coil unit 100, such as the heat exchanger 20. The exhaust valve 2 can be used to exhaust the air inside the fan coil unit 100 in time, so that the liquid can smoothly fill every corner, especially the complex pipe structure inside the heat exchanger 20. If the air is not exhausted, air blockage will be formed, resulting in the inability of the liquid to completely fill the heat exchanger 20, reducing its effective heat exchange area, thereby affecting the heat exchange efficiency, and prone to local overheating or overcooling. The existence of the exhaust valve 2 ensures that the liquid can be fully filled, so that the heat exchanger 20 can 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 reduce or avoid the occurrence of cavitation, extend the service life of the fan coil unit 100, and reduce the cost of later maintenance and replacement.

[0112] The present application proposes a fan coil unit 100, which is applied to an indoor unit of an air conditioner. The fan coil unit 100 includes a liquid distributor 10 and a heat exchanger 20. The heat exchanger 20 includes an upper plate 22, a lower plate 23 and a plurality of heat exchange tubes 21. The plurality of heat exchange tubes 21 can be arranged in a winding manner between the upper plate 22 and the lower plate 23 to increase the heat exchange path in a limited space to ensure sufficient heat exchange.

[0113] The perforated section 211 passes through the upper side plate 22. Each heat exchange tube 21 is provided with a perforated section 211. The perforated sections 211 are inserted into the tube passing holes 12a in a one-to-one correspondence and are in interference fit with the seal 14. At this time, in the structure of the housing 1 formed by the upper cover 11 and the lower cover 12, the lower cover 12 of the housing 1 can exist as the upper side plate 22 of the heat exchanger 20. The lower cover 12 is provided with tube passing holes 12a. Then the perforated sections 211 pass through the tube passing holes 12a and are in interference fit with the seal 14, thereby realizing the installation and fixation of the heat exchanger 20 and the manifold 10 and the flow path docking. The installation is efficient and reliable, and the cost is also relatively low. In one structural form, the perforated section 211 can also further be in interference fit with the seal 14 by expanding the tube wall, so as to better achieve the sealing effect and have better installation stability.

[0114] The heat exchange tube 21 is one of a copper tube, an aluminum tube, and a flexible stainless steel tube. When the heat exchange tube 21 is a copper tube, the thermal conductivity of the copper material is relatively high, so the heat transfer efficiency is high, which can significantly improve the heat exchange performance of the heat exchanger 20. Moreover, the copper tube has natural oxidation resistance, is stable to water, refrigerants (such as Freon), and most chemical media, and has a long service life. The copper tube is also easy to bend, flare, and braze, and the connection is reliably sealed, which can effectively reduce the risk of refrigerant leakage. When the heat exchange tube 21 is an aluminum tube, due to the lightweight characteristic of aluminum, the weight of the heat exchanger 20 can be greatly reduced, and the cost of the aluminum tube is low, which is suitable for mass production. When the heat exchange tube 21 is a flexible stainless steel tube, the flexible stainless steel tube is corrosion-resistant and resistant to temperature and pressure, can be expanded to 3 times the pipe diameter, does not require additional elbows or welded joints, can simplify the complex pipeline layout, improve the installation efficiency, and has a long service life, reducing the maintenance and replacement cost.

[0115] This application also proposes an air conditioner indoor unit, which includes a fan coil 100, a housing 300, and a water receiving tray 200. The specific structure of this air conditioner indoor unit refers to the above embodiments. Since this air conditioner indoor unit adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the manifold 10 and the heat exchanger 20 are both arranged in the housing 300.

[0116] The water receiving tray 200 is disposed inside the machine housing 300. The water receiving tray 200 is usually made of corrosion-resistant materials (such as stainless steel, ABS plastic, etc.), taking into account both light weight and durability. Anti-slip patterns or diversion grooves can be added to the surface of the water receiving tray 200 to optimize the water collection efficiency. Condensate is likely to be generated on the surface of the heat exchanger 20 due to temperature difference, and there is a small amount of leakage or frosting during the distribution and collection of liquid by the manifold 10. The water receiving tray 200 is located below the heat exchanger 20 and the manifold 10. By using the gravity effect, it collects the condensate or leaked liquid dripping from the heat exchanger 20 and the manifold 10, ensuring that the liquid is directly intercepted and collected by the water receiving tray 200 after natural fall. Thus, it avoids the liquid from dripping onto other electrical components inside the air conditioner indoor unit, preventing short circuits, corrosion or insulation failure, and significantly improving the reliability of the equipment.

[0117] This application also proposes a heating, ventilation and air conditioning (HVAC) system. The HVAC system includes the above-mentioned air conditioner indoor unit and an air conditioner outdoor unit, and the air conditioner outdoor unit is connected to the air conditioner indoor unit through pipelines. The HVAC system of this application includes, but is not limited to, heat pumps and multi-connected units, etc.

[0118] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing this 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 drawings are only for illustrative purposes and cannot be understood as a limitation to this application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0119] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A liquid collector, characterized in that: Applied to an indoor unit of an air conditioner, the indoor unit of the air conditioner comprises a heat exchanger, the heat exchanger comprises a heat exchange tube, and the liquid collector comprises: The shell has a liquid inlet cavity and a liquid outlet cavity which are independent of each other, wherein the liquid inlet cavity is used to divert liquid to the plurality of heat exchange tubes, and the liquid outlet cavity is used to collect liquid from the plurality of heat exchange tubes, and the shell has a plurality of tube holes which are respectively connected to the liquid inlet cavity and the liquid outlet cavity and are used for the heat exchange tubes to pass therethrough; and A sealing member is at least arranged on the hole wall of the tube hole, and the sealing member is used for interference fit with the portion of the heat exchange tube passing through the tube hole.

2. The liquid collector according to claim 1, characterized in that: The sealing element comprises: The inner hole sealing part is arranged on the hole wall of the tube hole in a sleeve shape, and the inner hole sealing part surrounds the circumference of the heat exchange tube.

3. The liquid collector according to claim 2, characterized in that: The housing comprises: Upper cover; and A lower cover, connected to the upper cover and having the pipe hole; The seal also includes: The upper sealing part is arranged between the upper cover and the lower cover and connected to the sealing part in the hole to seal the gap between the upper cover and the lower cover, and together with the upper cover, the liquid inlet cavity and the liquid outlet cavity are formed; the upper sealing part is provided with a plurality of liquid holes, and the liquid holes are connected with the tube holes in a one-to-one correspondence.

4. The liquid collector according to claim 3, characterized in that: The sealing member comprises: The lower sealing part is arranged on the lower surface of the lower cover and connected with the inner sealing part of the hole.

5. The liquid collector according to claim 4, characterized in that: The lower surface of the lower cover is provided with a receiving groove, and the lower sealing part is embedded in the receiving groove.

6. The liquid collector according to claim 4, characterized in that: The lower sealing portion covers a lower surface of the lower cover.

7. The liquid collector according to claim 4, characterized in that: The upper sealing portion, the in-hole sealing portion and the lower sealing portion are an integral component.

8. The liquid collector according to claim 4, characterized in that: The sealing component is a rubber component or a plastic component.

9. The liquid collector according to claim 3, characterized in that: Also includes: A conducting member, disposed in the liquid inlet cavity and used to conduct the two heat exchange tubes in the liquid inlet cavity, and / or, disposed in the liquid outlet cavity and used to conduct the two heat exchange tubes in the liquid outlet cavity; as well as A separator, which is arranged on the upper cover or the lower cover and cooperates with the upper cover and the lower cover to form the liquid inlet cavity and the liquid outlet cavity; Wherein, the conductive member is arranged on at least one of the upper cover, the lower cover and the partition.

10. The liquid collector according to claim 9, characterized in that: The partition divides the internal space enclosed by the upper cover and the lower cover into the liquid inlet cavity and the liquid outlet cavity along the horizontal direction or the vertical direction.

11. The liquid collector according to claim 9, characterized in that: The conductive member comprises: A first conducting member, disposed in the liquid inlet cavity, for conducting the two heat exchange tubes; and The second conducting member is arranged in the liquid outlet cavity and is used for conducting the two heat exchange tubes.

12. The liquid collector according to claim 9, characterized in that: A plurality of the via holes are arranged along a row direction, and the conductive member connects two adjacent via holes along the row direction; or, The plurality of via holes are arranged along a column direction, and the conductive member connects two adjacent via holes along the column direction; or, The plurality of via holes are arranged in a row direction and in a column direction, some of the conductive members connect two adjacent via holes in the row direction, and the remaining conductive members connect two adjacent via holes in the column direction.

13. The liquid collector according to claim 12, characterized in that: The partition divides the internal space enclosed by the upper cover and the lower cover into the liquid inlet cavity and the liquid outlet cavity along the horizontal direction, and the column direction is parallel to the extension direction of the partition.

14. A fan coil unit, characterized in that: include: The liquid collector according to any one of claims 1 to 13; as well as The heat exchanger comprises a plurality of heat exchange tubes, each of which is provided with a perforated section, and the perforated sections are inserted into the tube holes one by one and are interference fit with the sealing member.

15. The fan coil unit according to claim 14, characterized in that: The heat exchange tube includes one of a copper tube, an aluminum tube and a flexible stainless steel tube.

16. An air conditioner indoor unit, characterized in that: include: The fan coil unit according to any one of claims 14 to 15; A casing, wherein the liquid collector and the heat exchanger are both arranged in the casing; as well as The water receiving tray is arranged in the casing and is located below the heat exchanger and the liquid collector.

17. A HVAC system, characterized in that: include: The air conditioner indoor unit according to claim 16; as well as The air conditioner outdoor unit is connected with the air conditioner indoor unit pipeline.

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