A dual-system dispenser assembly structure for direct expansion indoor units with foolproof design.

Abstract

This utility model discloses a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function, including a direct expansion inner plate, a first system, and a second system. The first system and the second system are respectively installed on the upper and lower sides of the direct expansion inner plate. The first system includes a first gas collecting pipe assembly and a first distributor assembly; the second system includes a second gas collecting pipe assembly and a second distributor assembly. The first distributor assembly and the second distributor assembly are respectively installed on one side of the direct expansion inner plate through two fixed distributor bracket assemblies, and one side of the direct expansion inner plate is connected to the first gas collecting pipe assembly and the second gas collecting pipe assembly, respectively. The upper and lower arrangement of the first distributor assembly, the second distributor assembly, the first gas collecting pipe assembly, and the second gas collecting pipe assembly effectively prevents mistakes during assembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of central air conditioning unit equipment, and in particular relates to a dual-system liquid distributor assembly structure for direct expansion indoor units with a foolproof function. Background Technology

[0002] With the escalating global energy crisis and increasingly stringent energy-saving standards, coupled with rising user demands for indoor comfort—requiring not only rapid temperature control but also uniform airflow distribution and stable indoor temperature and humidity—central air conditioning systems, particularly modular air handling units (MLUs), effectively meet these needs. The evaporator section of these units typically utilizes direct expansion coils as the evaporator assembly, a crucial component for regulating indoor temperature. Furthermore, direct expansion coils can be flexibly designed to suit various indoor spatial layouts and cooling / heating requirements.

[0003] Direct expansion indoor units, also known as direct expansion coils, directly exchange heat with the air until it meets the ideal supply temperature and humidity before delivering it to all corners of the room, providing users with a comfortable indoor environment. During the production of direct expansion indoor units, multiple systems are involved, resulting in a complex and numerous piping structure. Without clear and distinct markings or structural design, workers can easily confuse components from different systems during assembly, leading to assembly errors, refrigerant distribution system disorders, and accelerated wear and tear on the indoor unit over time, potentially causing unit damage. Once critical components are damaged, maintenance personnel need to spend more time and effort diagnosing and repairing the problem, significantly increasing after-sales maintenance costs and reducing user satisfaction. Utility Model Content

[0004] In view of this, the present invention aims to propose a dual-system liquid dispenser assembly structure for direct expansion indoor units with a foolproof function, in order to solve at least one technical problem in the background art.

[0005] This application relates to a dual-system distributor assembly structure for direct expansion indoor units with a mistake-proof function. Through the structural design and optimization of the distributor assembly, it can effectively prevent workers from connecting the pipes of different systems incorrectly due to negligence in the case of multi-system direct expansion indoor units, reduce rework problems caused by incorrect assembly, and greatly reduce maintenance frequency and cost.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A dual-system liquid dispenser assembly structure for a direct expansion indoor unit with a foolproof function includes a direct expansion inner disc, a first system, and a second system; The first system and the second system are respectively installed on the upper and lower sides of the straight expansion inner plate; The first system includes a first gas collecting tube assembly and a first liquid dispenser assembly; The second system includes a second gas collection tube assembly and a second liquid dispenser assembly; The first and second liquid dispenser assemblies are respectively mounted on one side of the straight expansion inner plate through two fixed liquid dispenser bracket assemblies, and the first and second liquid dispenser assemblies are connected to the straight expansion inner plate. One side of the straight expansion inner plate is connected to the first and second gas collecting pipe assemblies, and the straight expansion inner plate is connected to the two first and second gas collecting pipe assemblies. The first tracheal tube assembly and the first liquid dispenser assembly are engraved with the word "first"; The first set of tracheal tube assembly and the first dispensing assembly are engraved with the second.

[0007] Furthermore, the first and second dispenser assemblies have the same structure; Both the first and second distributor assemblies include an expansion valve, a first filter, a second filter, and a dispensing head; The first filter is connected to the expansion valve, and the expansion valve is connected to the second filter; the second filter is connected to the distributor head, and the distributor head is connected to the straight expansion inner disc through a capillary tube.

[0008] Furthermore, the first filter is connected to the refrigerant inlet copper pipe and the first filter is connected to the expansion valve; The expansion valve is connected to the second filter via a first copper pipe, and the second filter is connected to the dispensing head via a second copper pipe.

[0009] Furthermore, the first copper tube is L-shaped.

[0010] Furthermore, the second copper tube is L-shaped.

[0011] Furthermore, the inner diameter of the side of the first filter closest to the refrigerant inlet copper pipe is the same as the outer diameter of the refrigerant inlet copper pipe, and the inner diameter of the other side of the first filter is the same as the outer diameter of the expansion valve extending from the copper pipe.

[0012] Furthermore, the inner diameters of the two sides of the second filter are the same as the outer diameters of the first copper tube and the second copper tube, respectively.

[0013] Furthermore, the fixed dispenser support assembly includes a fixed dispenser support and a first U-shaped clamp and a second U-shaped clamp; The fixed dispenser support is L-shaped; the vertical end of the fixed dispenser support is installed on one side of the straight expansion inner plate. The bolts on both sides of the first U-shaped clamp are installed on the vertical end of the fixed separator bracket, and the first filter is installed on the fixed separator bracket through the first U-shaped clamp; The bolts on both sides of the second U-shaped clamp are installed on the horizontal end of the fixed distributor bracket, and the second filter is installed on the fixed distributor bracket through the second U-shaped clamp.

[0014] Furthermore, one side of the straight expansion inner disc is provided with several first mounting holes for installing and fixing the dispenser support assembly.

[0015] Furthermore, the horizontal end of the fixed dispensing device bracket is provided with a second mounting hole for installing the first U-shaped clamp, and the vertical end of the fixed dispensing device bracket is provided with a third mounting hole for installing the second U-shaped clamp.

[0016] Compared with existing technologies, the dual-system liquid dispenser assembly structure for direct expansion indoor units with anti-mistake function described in this utility model has the following advantages: 1. The present invention describes a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function. The first distributor assembly, the second distributor assembly, the first gas collecting pipe assembly, and the second gas collecting pipe assembly are arranged in an upper and lower configuration to effectively prevent mistakes and avoid errors made by workers during assembly.

[0017] 2. The dual-system liquid dispenser assembly structure for direct expansion indoor units with a foolproof function described in this utility model can avoid occupying too much space in the horizontal direction, and is particularly suitable for some places with limited space, reducing the section length and saving installation space.

[0018] 3. The present invention discloses a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function. The end plate on one side of the direct expansion inner disc containing the distributor assembly has multiple pre-drilled holes. When the number of holes on the direct expansion inner disc varies, the positions of the distributor assembly and the bracket fixing the distributor assembly will also change, effectively improving assembly efficiency.

[0019] 4. The dual-system distributor assembly structure for direct expansion indoor units with a foolproof function described in this utility model welds the expansion valve, the first filter, the second filter and the dispensing head together, which facilitates the installation of the direct expansion inner disc and the distributor assembly and can greatly improve factory production efficiency. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is an exploded structural diagram of the direct expansion indoor unit according to an embodiment of the present invention (capillary tube is not shown). Figure 2 This is a schematic diagram of the overall structure of the direct expansion indoor unit according to an embodiment of the present invention (capillary tube is not shown). Figure 3This is a top view of the overall structure of the direct expansion indoor unit described in this embodiment of the utility model (capillary tubes are not shown). Figure 4 This is a schematic diagram of the overall structure of the first liquid separator assembly in this embodiment of the present invention (capillary tube is not shown). Figure 5 This is an exploded view of the first liquid separator assembly in an embodiment of the present invention (capillary tube not shown). Figure 6 This is a top view of the first liquid separator assembly in an embodiment of the present invention (the capillary tube is not shown). Attached image description: 1. Direct expansion inner plate; 2. First gas collecting pipe assembly; 3. First distributor assembly; 3-1. Expansion valve; 3-2. First filter; 3-3. Refrigerant inlet copper pipe; 3-4. Second filter; 3-5. Distributor head; 3-6. First copper pipe; 3-7. Second copper pipe; 4. Fixed distributor bracket; 5. First U-shaped clamp; 6. Second U-shaped clamp; 7. Second gas collecting pipe assembly; 8. Second distributor assembly. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 1 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function includes a direct expansion inner plate 1, a first system, and a second system. The first system and the second system are respectively installed on the upper and lower sides of the direct expansion inner plate 1. The first system includes a first gas collecting pipe assembly 2 and a first distributor assembly 3. The second system includes a second gas collecting pipe assembly 7 and a second distributor assembly 8. The first distributor assembly 3 and the second distributor assembly 8 are respectively installed on one side of the direct expansion inner plate 1 through two fixed distributor bracket assemblies, and the first distributor assembly 3 and the second distributor assembly 8 are connected to the direct expansion inner plate 1. One side of the direct expansion inner plate 1 is connected to the first gas collecting pipe assembly 2 and the second gas collecting pipe assembly 7 respectively, and the direct expansion inner plate 1 is connected to the two first gas collecting pipe assemblies 2 and the second gas collecting pipe assembly 7. The first gas collecting pipe assembly 2 and the first distributor assembly 3 are engraved with the character "first" and the character "second".

[0027] The first distributor assembly 3 and the second distributor assembly 8 have the same structure; both the first distributor assembly 3 and the second distributor assembly 8 include an expansion valve 3-1, a first filter 3-2, a second filter 3-4, and a dispensing head 3-5; the first filter 3-2 is connected to the expansion valve 3-1, and the expansion valve 3-1 is connected to the second filter 3-4; the second filter 3-4 is connected to the dispensing head 3-5, and the dispensing head 3-5 is connected to the direct expansion inner disc 1 through a capillary tube. The first filter 3-2 is connected to the refrigerant inlet copper pipe 3-3, and the first filter 3-2 is connected to the expansion valve 3-1; the expansion valve 3-1 is connected to the second filter 3-4 through a first copper pipe 3-6, and the second filter 3-4 is connected to the dispensing head 3-5 through a second copper pipe 3-7.

[0028] The first copper pipe 3-6 is L-shaped. The second copper pipe 3-7 is L-shaped. The inner diameter of the side of the first filter 3-2 closest to the refrigerant inlet copper pipe 3-3 is the same as the outer diameter of the refrigerant inlet copper pipe 3-3. The inner diameter of the other side of the first filter 3-2 is the same as the outer diameter of the copper pipe extending from the expansion valve 3-1. The inner diameters of the two sides of the second filter 3-4 are the same as the outer diameters of the first copper pipe 3-6 and the second copper pipe 3-7, respectively.

[0029] The fixed dispenser support assembly includes a fixed dispenser support 4 and a first U-shaped clamp 5 and a second U-shaped clamp 6; the fixed dispenser support 4 is L-shaped; the vertical end of the fixed dispenser support 4 is installed on one side of the straight expansion inner plate 1, the bolts on both sides of the first U-shaped clamp 5 are installed on the vertical end of the fixed dispenser support 4, and the first filter 3-2 is installed on the fixed dispenser support 4 through the first U-shaped clamp 5; the bolts on both sides of the second U-shaped clamp 6 are installed on the horizontal end of the fixed dispenser support 4, and the second filter 3-4 is installed on the fixed dispenser support 4 through the second U-shaped clamp 6.

[0030] The inner expansion disc 1 has several first mounting holes on one side for installing the fixed dispensing device bracket assembly. The horizontal end of the fixed dispensing device bracket 4 has a second mounting hole for installing the first U-shaped clamp 5, and the vertical end of the fixed dispensing device bracket 4 has a third mounting hole for installing the second U-shaped clamp 6.

[0031] like Figure 2 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is disclosed. In the dual system, the gas collecting pipe assembly 2, the first distributor assembly 3, and the fixed distributor bracket 4 are arranged vertically and have the same structure, which can effectively prevent foolproofing, reduce the probability of incorrect assembly, reduce rework costs, and significantly improve production efficiency.

[0032] like Figure 2 As shown, a dual-system distributor assembly for a direct expansion indoor unit with a foolproof design features clearly defined piping. The upper structure is the first system, and the lower structure is the second system. The assembly is clearly numbered, effectively preventing incorrect connections when connecting the indoor and outdoor units, thus ensuring stable system operation.

[0033] like Figure 2 As shown, a dual-system liquid distributor assembly structure for a direct expansion indoor unit with a foolproof function is provided. The connection between the direct expansion inner plate 1 and the first gas collecting pipe assembly 2 and the second gas collecting pipe assembly 7 is achieved by welding, which results in high connection strength and good sealing, ensuring the integrity of the structure and overall safety.

[0034] like Figure 2 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is described. When the direct expansion indoor unit is working, the refrigerant enters the direct expansion inner plate 1 through the capillary tube of the distribution head 3-5 on the first distributor assembly 3, and then flows out in the gas collection pipe assembly 2; the second distributor assembly 7 is located away from the same area. The first distributor assembly 3 and the second distributor assembly 7 can evenly distribute the refrigerant into each pipeline of the direct expansion inner plate 1, achieving a reasonable distribution of refrigerant flow.

[0035] like Figure 2As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is provided. The first distributor assembly 3 is fixed on the direct expansion inner plate 1 by fixing the distributor bracket 4, the first U-shaped clamp 5 and the cross-groove countersunk self-tapping self-drilling screws, which prevents the copper pipe from fatigue fracture due to vibration during the operation of the direct expansion indoor unit.

[0036] like Figure 2 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is provided. The vertical ends of the first distributor assembly 3 and the second distributor assembly 8 are provided with multiple reserved holes. The first distributor assembly 3, the second distributor assembly 7 and the fixed distributor bracket 4 can be adjusted in the vertical direction according to the different number of holes in the direct expansion indoor unit. The structure is flexible and improves the assembly speed on the production line.

[0037] like Figure 3 As shown, a dual-system liquid dispenser assembly structure for direct expansion indoor units with a foolproof function is presented. Its overall structure is sturdy and durable, avoiding excessive space occupation in the horizontal direction and reducing section length. In some space-limited places, it can effectively save installation space and optimize costs.

[0038] like Figure 3 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is disclosed. The first copper pipe 3-7 and the refrigerant inlet copper pipe 3-3 are no longer on the same plane. The first distributor assembly 3 has a certain angle, which makes the assembly more flexible during installation and avoids interference between the distributor head 3-5 and the refrigerant inlet copper pipe 3-3 connected to the first filter 3-2 when the distributor head 3-5 is large. This ensures that the first distributor assembly 3 can operate stably.

[0039] like Figure 4 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is provided. The expansion valve 3-1, the first filter 3-2, the second filter 3-2, and the distributor head 3-5 are welded together by a refrigerant inlet copper pipe 3-3. After welding, it is assembled with the direct expansion inner plate 1 as an assembly to improve factory production efficiency.

[0040] like Figure 4 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is described. Under refrigeration operation, the refrigerant enters the first distributor assembly 3 from the refrigerant inlet copper pipe 3-3 connected to the first filter 3-2, flows through the first filter 3-2, expansion valve 3-1, second filter 3-2, and distributor head 3-5, and finally the refrigerant is evenly distributed to each pipeline of the direct expansion inner plate 1.

[0041] like Figure 4As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is presented. Its expansion valve 3-1 is a crucial component of the air conditioning system, precisely regulating the refrigerant flow into the direct expansion inner coil 1 according to system requirements. It throttles the refrigerant during cooling mode and remains fully open during heating mode. The expansion valve 3-1 enables the air conditioning system to flexibly adapt to various operating conditions, ensuring efficient system operation.

[0042] like Figure 4 As shown, a dual-system distributor assembly structure for a direct expansion indoor unit with a foolproof function is presented. The inner diameter of one side of the first filter 3-2 is the outer diameter of the refrigerant inlet copper pipe 3-3, and the inner diameter of the other side is the outer diameter of the copper pipe extending from the expansion valve 3-1. The inner diameters of both sides of the second filter 3-2 are the outer diameters of the refrigerant inlet copper pipe 3-3. The use of the first filter 3-2 reduces the space occupied in the width direction of the direct expansion inner plate 1, thus lowering the space occupancy rate. Furthermore, filters are installed on both sides of the expansion valve 3-1 to prevent clogging during operation, effectively ensuring the safe and stable operation of the entire system.

[0043] The technical advantages of this embodiment are: it provides error-proof functionality, a robust and durable structure, small footprint, and high versatility. It effectively avoids the potential for assembly errors caused by workers confusing different components during assembly, which could even damage the unit. Furthermore, the welding and fixing of some structural components to the direct expansion inner plate in the form of assemblies effectively ensures the refrigerant circulation within the system, guaranteeing the safe and stable operation of the air conditioning system.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-system liquid dispenser assembly structure for a direct expansion indoor unit with a foolproof function, characterized in that: Includes a direct expansion inner disc, a first system, and a second system; The first system and the second system are respectively installed on the upper and lower sides of the straight expansion inner plate; The first system includes a first gas collecting tube assembly and a first liquid dispenser assembly; The second system includes a second gas collection tube assembly and a second liquid dispenser assembly; The first and second liquid dispenser assemblies are respectively installed on one side of the straight expansion inner plate through two fixed liquid dispenser bracket assemblies, and the first and second liquid dispenser assemblies are connected to the straight expansion inner plate. One side of the straight expansion inner plate is connected to the first and second gas collecting pipe assemblies, and the straight expansion inner plate is connected to the two first and second gas collecting pipe assemblies. The first tracheal tube assembly and the first liquid dispenser assembly are engraved with the word "first"; The first set of tracheal tube assembly and the first dispensing assembly are engraved with the second.

2. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 1, characterized in that: The first and second dispensing components have the same structure; Both the first and second distributor assemblies include an expansion valve, a first filter, a second filter, and a dispensing head; The first filter is connected to the expansion valve, and the expansion valve is connected to the second filter; the second filter is connected to the distributor head, and the distributor head is connected to the straight expansion inner disc through a capillary tube.

3. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 2, characterized in that: The first filter is connected to the refrigerant inlet copper pipe, and the first filter is connected to the expansion valve; The expansion valve is connected to the second filter via a first copper pipe, and the second filter is connected to the dispensing head via a second copper pipe.

4. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 3, characterized in that: The first copper tube is L-shaped.

5. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 3, characterized in that: The second copper tube is L-shaped.

6. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 3, characterized in that: The inner diameter of the first filter on the side closest to the refrigerant inlet copper pipe is the same as the outer diameter of the refrigerant inlet copper pipe, and the inner diameter of the other side of the first filter is the same as the outer diameter of the expansion valve protruding from the copper pipe.

7. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 3, characterized in that: The inner diameters of the two sides of the second filter are the same as the outer diameters of the first copper tube and the second copper tube, respectively.

8. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 1, characterized in that: The fixed dispenser support assembly includes a fixed dispenser support and a first U-shaped clamp and a second U-shaped clamp; The fixed dispenser support is L-shaped; the vertical end of the fixed dispenser support is installed on one side of the straight expansion inner plate. The bolts on both sides of the first U-shaped clamp are installed on the vertical end of the fixed separator bracket, and the first filter is installed on the fixed separator bracket through the first U-shaped clamp; The bolts on both sides of the second U-shaped clamp are installed on the horizontal end of the fixed distributor bracket, and the second filter is installed on the fixed distributor bracket through the second U-shaped clamp.

9. The structure of a dual-system distributor assembly for a direct expansion indoor unit with anti-mistake function as described in claim 8, characterized in that: One side of the straight expansion inner disc has several first mounting holes for installing and fixing the dispenser support assembly.

10. The structure of a dual-system liquid dispenser assembly for a direct expansion indoor unit with anti-mistake function as described in claim 8, characterized in that: The horizontal end of the fixed dispensing device bracket is provided with a second mounting hole for installing the first U-shaped clamp, and the vertical end of the fixed dispensing device bracket is provided with a third mounting hole for installing the second U-shaped clamp.

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