Distributor assembly and heating, ventilation and air conditioning system having same

Abstract

A distributor assembly (1000) and a heating, ventilation and air conditioning system having same. The distributor assembly (1000) comprises: a distributor (100); and a plurality of branch pipes (200), wherein the plurality of branch pipes (200) are all connected to the distributor (100).

Description

Distributor assembly and heating ventilation system with same

[0001] Cross-reference to Related Applications

[0002] This application is based on Chinese Patent Application No. 202422226108.4 and 202411266948.1, filed on September 10, 2024, and Chinese Patent Application No. 202422535175.4, filed on October 18, 2024, and claims priority to the Chinese Patent Application No. 202422535175.4, the contents of which are incorporated herein in their entirety. TECHNICAL FIELD

[0003] The present application relates to the field of heating ventilation system manufacturing, in particular to a distributor assembly and a heating ventilation system with the same. BACKGROUND

[0004] In the structural design of an air conditioning unit, a distributor is generally arranged on the pipeline of a compressor for converging refrigerant of multiple branch pipes into the distributor. When the refrigerant flows in the pipeline, the refrigerant will impact the pipeline, and when the heating ventilation system is working, the compressor will vibrate, which will reduce the connection reliability at the connection position between the distributor and the pipeline, and further affect the use reliability of the entire heating ventilation system.

[0005] SUMMARY

[0006] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a distributor assembly which can reduce the assembly time and cost of the heating ventilation system and improve the use reliability of the heating ventilation system.

[0007] The present application also proposes a heating ventilation system with the above-mentioned distributor assembly.

[0008] According to the distributor assembly of the first aspect of the present application, the distributor assembly comprises: a distributor having a distribution cavity and a flow-in hole and a plurality of flow-out holes in communication with the distribution cavity; and a plurality of branch pipes, each of the plurality of branch pipes being connected to the distributor and being arranged in one-to-one correspondence with the plurality of flow-out holes.

[0009] According to the distributor assembly of the present application, the assembly time and cost of the distributor assembly can be reduced, and the use reliability of the heating ventilation system can be improved.

[0010] According to some embodiments of the present application, at least one of the distributor and the branch pipes is a flexible stainless steel material piece.

[0011] According to some embodiments of the present application, the plurality of branch pipes are in one-to-one correspondence with and are connected to the plurality of flow-out holes.

[0012] According to some optional embodiments of the present application, one end of the distribution cavity is in communication with the plurality of the distribution holes and the other end is in communication with the inflow hole.

[0013] According to some optional embodiments of the present application, the distributor comprises a main body in which the distribution holes and the distribution cavity are formed, and a plurality of the branch pipes are connected to one end of the main body; a connector is connected to a side of the main body away from the branch pipes, and an inner side of the connector defines the first inflow hole.

[0014] According to some optional embodiments of the present application, the main body is tapered, and the cross-sectional size of the outer profile of the main body gradually decreases in the direction from the main body to the connector; the distribution holes are arranged on a side of the main body away from the connector, and a plurality of the distribution holes are arranged at intervals along the circumference of the main body; the distribution cavity is annular along the circumference of the main body, and the distribution cavity extends obliquely towards the central axis of the main body in the direction from the main body to the connector.

[0015] According to some embodiments of the present application, the yield strength of the flexible stainless steel is 140-180 MPa; and / or, the tensile strength of the flexible stainless steel is 400-600 MPa; and / or, the elongation of the flexible stainless steel is 50-80%; and / or, the yield strength ratio of the flexible stainless steel is less than 0.4; and / or, the hardness of the flexible stainless steel material is 100-120 Hv.

[0016] According to some embodiments of the present application, the M D30 / 50 is -50℃ to -80℃.

[0017] According to some embodiments of the present application, the flexible stainless steel is an austenitic flexible stainless steel, and the average grain size of the flexible stainless steel is 20-40 μm.

[0018] According to some embodiments of the present application, the wall thickness of the flexible stainless steel pipe is 1.2-1.5 mm.

[0019] According to some embodiments of the present application, the distributor assembly further comprises a main pipe, one end of the main pipe being connected to the connector, and the main pipe being a copper pipe, a copper alloy pipe or a flexible stainless steel pipe.

[0020] According to some optional embodiments of the present application, the distributor assembly further comprises an adapter pipe connected between the connector and the main pipe, wherein the main pipe is a copper pipe or a copper alloy pipe, and the adapter pipe is a copper sleeve.

[0021] According to some embodiments of the present application, the main pipe is connected to the connector portion by insertion, wherein the insertion depth of the main pipe is 5-20 mm, and / or the fitting gap between the main pipe and the connector portion is 0.1-0.2 mm.

[0022] According to some embodiments of the present application, the main pipe is connected to the connector portion by welding.

[0023] According to some embodiments of the present application, the side of the main body facing the branch pipe is provided with a weight-reducing groove recessed towards the connector portion.

[0024] According to some embodiments of the present application, the end of the branch pipe facing the distributor is provided with a first flange, which surrounds the branch pipe and is connected to the distributor.

[0025] In addition, the distributor assembly according to the present application can also have the following additional technical features:

[0026] In some embodiments of the present application, the distributor comprises a main body, which comprises: a shell defining a distribution cavity in communication with the inflow hole, the side of the distribution cavity away from the inflow hole being open; and a plate body connected to the shell and located on the side of the distribution cavity away from the inflow hole, the plate body being provided with a plurality of shunt holes, and the plurality of shunt holes being arranged around the inflow hole.

[0027] In some embodiments of the present application, the distributor assembly further comprises a shunt cone arranged on the plate body, the axis of the shunt cone being arranged on the same line as the axis of the inflow hole, and the shunt cone being used to guide fluid from the inflow hole to the shunt holes.

[0028] In some embodiments of the present application, the shunt cone and the plate body are integrally formed.

[0029] In some embodiments of the present application, the plate body is provided with a relief hole, and the shunt cone comprises a cone body, an extension section and a second flange connected in sequence, wherein the cone body is arranged inside the distribution cavity, the extension section is adapted to the inner wall of the relief hole, and the second flange is connected to the side of the plate body away from the distribution cavity.

[0030] In some embodiments of the present application, the branch pipes are rigid members, and the plurality of branch pipes are arranged along different predetermined paths respectively.

[0031] In some embodiments of the present application, the aperture of the shunt hole is smaller than the inner diameter of the branch pipe.

[0032] In some embodiments of the present application, the distributor has a spout portion defining the inflow hole; the distributor assembly further comprises a header pipe sleeved outside the spout portion.

[0033] In some embodiments of the present application, the header pipe further comprises: an inlet pipe sleeved on the spout portion, and the inlet pipe has an incident cavity with an inner diameter greater than that of the inflow hole; a second adapter inserted at an end of the inlet pipe away from the inflow hole.

[0034] A second aspect of the present application further provides a heating and ventilation system, comprising: an indoor unit, a heat source unit, and liquid and gas communication pipes communicating the two; the indoor unit has a first heat exchanger comprising a first heat exchanger main body, a first gas pipe assembly, and a first liquid pipe assembly; the first gas pipe assembly comprises a first gas collecting pipe and a plurality of first shunt pipes connected to the pipe wall of the first gas collecting pipe; the first gas collecting pipe communicates with the gas communication pipe; the first shunt pipes are connected to the gas side of the heat exchange pipes of the first heat exchanger main body; the heat source unit has a compressor and a second heat exchanger comprising a second heat exchanger main body, a second gas pipe assembly, and a second liquid pipe assembly; the second gas pipe assembly comprises a second gas collecting pipe and a plurality of second shunt pipes connected to the pipe wall of the second gas collecting pipe; the axial end port of the second gas collecting pipe communicates with the exhaust port or the return port of the compressor; the second shunt pipes are connected to the gas side of the heat exchange pipes of the second heat exchanger main body; wherein the first liquid pipe assembly is configured as the distributor assembly according to the above embodiments of the present application, and the branch pipes are connected to the liquid side of the heat exchange pipes of the first heat exchanger; and / or the second liquid pipe assembly is configured as the distributor assembly according to the above embodiments of the present application, and the branch pipes are connected to the liquid side of the heat exchange pipes of the second heat exchanger.

[0035] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by those skilled in the art through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 is a schematic view of a distributor assembly according to an embodiment of the present application;

[0037] Fig. 2 is a sectional view along the line A-A shown in Fig. 1;

[0038] Fig. 3 is a schematic view of the welding of the distributor and the branch pipe shown in Fig. 1;

[0039] Fig. 4 is a partial enlarged view at B in Fig. 3;

[0040] Fig. 5 is a schematic view of the welding of the header pipe and the external pipe shown in Fig. 1;

[0041] Fig. 6 is an enlarged view of the portion C in Fig. 5;

[0042] Fig. 7 is a schematic view of the connection of the branch pipe and the first adapter to the heat exchange pipe of the heat exchanger;

[0043] Fig. 8 is a schematic view of the structure of a dispenser assembly according to another embodiment of the present application;

[0044] Fig. 9 is a schematic view of the structure of the dispenser assembly shown in Fig. 8;

[0045] Fig. 10 is a schematic view of the structure of the dispenser assembly shown in Fig. 8;

[0046] Fig. 11 is a schematic view of the structure of the dispenser assembly shown in Fig. 9 from another perspective;

[0047] Fig. 12 is a schematic view of the structure of the dispenser assembly shown in Fig. 10;

[0048] Fig. 13 is a schematic view of the structure of the dispenser assembly shown in Fig. 11;

[0049] Fig. 14 is a schematic view of the structure of a heating and ventilation system according to an embodiment of the present application;

[0050] Fig. 15 is a schematic view of the structure of the first heat exchanger or the second heat exchanger shown in Fig. 14.

[0051] Reference signs: 1, heating system; 1A, heat source unit; 1B, indoor unit; 1C, gas communication pipe; 1D, liquid communication pipe; 1E, heat exchange pipe; 1000, distributor assembly; 2000, first heat exchanger; 2100, first heat exchange main body; 2200, first gas pipe assembly; 2300, first liquid pipe assembly; 2210, second gas collecting pipe; 2220, second shunt pipe; 3000, second heat exchanger; 3100, second heat exchange main body; 3200, second gas pipe assembly; 3300, second liquid pipe assembly; 3210, second gas collecting pipe; 3220, second shunt pipe; 4000, compressor; a, exhaust port; b, return gas port; 5000, indoor expansion valve; 6000, four-way valve; c, first interface; d, second interface; e, third interface; f, fourth interface; 81, gas side pipe; 82, liquid side pipe; 91, outdoor expansion valve; 92, filter; 93, liquid side stop valve; 94, gas side stop valve; 95, gas-liquid separator; 100, distributor; 10, main body; 11, shell; 111, main shell part; 112, mounting part; 12, plate body; 121, avoiding hole; 101, incident cavity; 102, steady flow cavity; 103, distribution cavity; 104, mounting cavity; 105, inflow hole; 106, shunt hole; 107, weight-reducing groove; 20, pipe connecting part; 40, shunt cone; 41, cone body; 42, extension section; 43, second flange; 60, first adapter; 70, second adapter; 200, branch pipe; 210, first flange; 220, pipe body; 300, main pipe; 310, inlet pipe; 400, adapter pipe; 410, first adapter pipe; 420, second adapter pipe; 500, external pipe. DETAILED DESCRIPTION

[0052] Embodiments of the present application are described in detail below with reference to the attached drawings, which show, by way of example, specific embodiments in which like elements or components are referred to by like reference characters. The embodiments described below are examples for the purposes of explanation and are not to be construed as limiting of the present application.

[0053] As shown in FIGS. 1-15, a distributor assembly 1000 includes a distributor 100 and a plurality of branch pipes 200 and a main pipe 300. The plurality of branch pipes 200 are each in communication with the shunt hole 106 of the distributor 100, and the main pipe 300 is in communication with the pipe connecting part 20 of the distributor 100. At least one of the distributor 100, the branch pipes 200, and the main pipe 300 is a flexible stainless steel material piece, that is, one or two of the distributor 100, the branch pipes 200, and the main pipe 300 can be a flexible stainless steel material piece, or the distributor 100 and the branch pipes 200 can both be flexible stainless steel material pieces.

[0054] Referring to FIG. 14, the distributor assembly 1000 is used in a heating and cooling system 1, and in particular, the heating and cooling system 1 can include a heat source unit 1A and an indoor unit 1B connected in communication, the heat source unit 1A can be one or more in number, and the indoor unit 1B can be one or more in number, and in the example of FIG. 14, a refrigerant circulation loop is formed in communication between one heat source unit 1A and one indoor unit 1B, and in other embodiments, the number of heat source units 1A and indoor units 1B is not limited to one, as long as the refrigerant can circulate in the heat source unit 1A and the indoor unit 1B, which is the heating and cooling system 1 of the present application. In the following, the indoor unit 1B and the heat source unit 1A of the embodiment of FIG. 13 are introduced, and the indoor unit 1B and the heat source unit 1A are connected in communication by a liquid communication pipe 1D and a gas communication pipe 1E to form a refrigerant circulation loop.

[0055] The indoor unit 1B is installed in an indoor space, and is used to adjust the ambient temperature of the indoor space, and can be installed on the ceiling, wall or floor of the indoor space. The indoor unit 1B includes a first heat exchanger 2000, and a gas side pipe 81 and a liquid side pipe 82 connected to both sides of the heat source unit 1A, and the liquid side pipe 82 is provided with an indoor expansion valve 5000. The first heat exchanger 2000 includes a first heat exchanger main body 2100, a first gas pipe assembly 2200 and a first liquid pipe assembly 2300, the first gas pipe assembly 2200 includes a first gas collecting pipe 2210 and a plurality of first shunt pipes 2220 connected to the wall of the first gas collecting pipe 2210, the axial port of the first gas collecting pipe 2210 is connected and communicated with the gas side pipe 81, and the gas side pipe 81 is connected and communicated with the gas communication pipe 1E. In one embodiment, the first liquid pipe assembly 2300 is configured as a distributor assembly 1000, and the manifold 300 of the distributor assembly is connected in communication with the liquid side pipe 82.

[0056] The heat source unit 1A exchanges heat between the refrigerant and the heat source from the outside, which includes air, water or geothermal heat, and in the embodiment of FIG. 13, the heat source of the heat source unit 1A is air, which is driven by a fan to flow through the heat exchanger of the heat source unit 1A to achieve heat exchange between the heat source and the refrigerant. The heat source unit 1A includes a compressor 4000, a four-way valve 6000, a second heat exchanger 3000, an outdoor expansion valve 91, a filter 92, a liquid side stop valve 93 and a gas side stop valve 94. Among them, the compressor 4000 is used to compress the refrigerant, and the compressor 4000 has an exhaust port a and a return port b, the exhaust port a discharges the refrigerant to the refrigerant circulation loop, and the return port b recovers the refrigerant in the refrigerant circulation loop.

[0057] The four-way valve 6000 has four interfaces, which are defined as a first interface c, a second interface d, a third interface e and a fourth interface f. The first interface c is connected to the exhaust port a of the compressor 4000, the second interface d is connected to one side of the second heat exchanger 3000, the other side of the second heat exchanger 3000 is connected to the liquid-side stop valve 93, the third interface e is connected to the gas inlet of the gas-liquid separator 95, the gas outlet of the gas-liquid separator 95 is connected to the gas return port b of the compressor 4000, and the fourth interface f is connected to the gas-side stop valve 94. The heat source unit 1A has a heating mode and a cooling mode. In the cooling mode, the first interface c is connected to the second interface d, and the third interface e is connected to the fourth interface f. In the heating mode, the first interface c is connected to the fourth interface f, and the second interface d is connected to the third interface e.

[0058] The second heat exchanger 3000 includes a second heat exchanger body 3100, a second gas pipe assembly 3200 and a second liquid pipe assembly 3300. The second gas pipe assembly 3200 includes a second gas collecting pipe 3210 and a plurality of second branch pipes 3220 connected to the pipe wall of the second gas collecting pipe 3210. The axial port of the second gas collecting pipe 3210 is connected to the second interface d, and the plurality of second branch pipes 3220 are connected to the gas side of the heat exchange pipes 1E of the second heat exchanger 3000. In one embodiment, the second liquid pipe assembly 3300 is configured as a distributor assembly 1000, and the main pipe 300 of the distributor assembly 1000 is connected to the liquid-side stop valve 93.

[0059] In the distributor assembly 1000, at least one of the distributor 100, the branch pipe 200 and the main pipe 300 is a flexible stainless steel material, preferably, the flexible stainless steel is a stainless steel material with a copper content of 2-4%. It can be understood that the flexible stainless steel material not only maintains the structural strength of conventional stainless steel materials, but also has high ductility that conventional stainless steel materials do not have. Therefore, the distributor 100 can be well adapted when it is connected to the branch pipe 200 in a limited space or at a specific angle. Thus, the installation difficulty between the distributor 100 and the branch pipe 200 can be reduced, and the assembly time and cost of the heating and ventilation system 1 can be reduced. At the same time, the cost of the flexible stainless steel material is lower than that of copper material, so that the production cost of the distributor assembly 1000 can be reduced.

[0060] In the present application, the flexible stainless steel has one or more of the following material properties:

[0061] The yield strength of the flexible stainless steel is 140-180 MPa; and / or,

[0062] The tensile strength of the flexible stainless steel is 400-600 MPa; and / or,

[0063] The elongation of the flexible stainless steel is 50-80%; and / or,

[0064] the yield strength of the flexible stainless steel is less than 0.4; and / or,

[0065] the hardness of the flexible stainless steel material is 90-120 Hv; and / or,

[0066] the flexible stainless steel is an austenitic stainless steel, and the average grain size of the flexible stainless steel is 20-40 μm; and / or,

[0067] the M D30 / 50 is -50- -80 °C.

[0068] The yield strength and tensile strength of the flexible stainless steel are lower than those of a general stainless steel material (such as 304L stainless steel), are higher than those of copper, and the elongation and hardness of the flexible stainless steel are similar to those of copper and are much lower than those of a general stainless steel material (such as 304L stainless steel). The flexible stainless steel pipe according to the present application has a processing performance close to that of a copper pipe due to its low yield strength and high elongation, and can be processed using flanging, bending, flaring, necking, and other processing equipment for processing copper pipes. The flexible stainless steel pipe according to the present application has a processing performance close to that of a copper pipe and mechanical properties significantly better than those of a copper pipe, and thus can shorten the pipe length and reduce the bending radius to be applied to a more space-saving pipe structure design. In terms of processing, the bending radius of a copper pipe is generally required to be more than 1.8 times the outer diameter; however, the flexible stainless steel has good toughness, and the bending radius can theoretically be 1.2-1.5 times the outer diameter. In addition, the strength of stainless steel is better than that of copper, and the anti-vibration stress performance is stronger and less likely to crack due to vibration. The pipe body made of the flexible stainless steel material according to the present application has the above advantages, and thus the pipe wall of the pipe body can be made thinner to achieve lightweight design.

[0069] According to an example of the present application, the flexible stainless steel is an austenitic stainless steel, and the average grain size of the flexible stainless steel is 20-40 μm. Thus, the austenitic stainless steel having a grain size of 20-40 μm not only maintains the inherent good corrosion resistance and processability of austenitic stainless steel, but also has better mechanical properties and potentially longer service life due to grain refinement.

[0070] According to an example of the present application, the M D30 / 50 is -50- -80 °C, and in the field of stainless steel materials, MD30 / 50 represents the temperature at which 50% of martensite is generated after cold deformation of 30% true strain. This parameter is very important for predicting the behavior of stainless steel during processing, because the formation of martensite affects the hardness and magnetism of the material. Generally, the M D30 / 50The lower the value, the more difficult it is for the material to form martensite under the same deformation conditions, and therefore, the more resistant the material is to aging cracking, i.e., the less likely it is to crack. Conversely, if the "Md30" value is high, the material is more likely to produce martensite during processing, which can lead to cracking, and therefore, the flexible stainless steel M D30 / 50 The M D30 / 50 31.7°C, and theoretically, it is extremely difficult to produce a martensite phase change at room temperature. By making the critical temperature of the martensite transformation of the flexible stainless steel meet the above conditions, the flexible stainless steel material can work well in a low-temperature environment and has good stability.

[0071] The specific composition of the flexible stainless steel in the present application is described in detail below.

[0072] In one embodiment, the composition of the flexible stainless steel includes at least Cu. The addition of Cu can increase the stacking fault energy, inhibit the formation of ε-martensite, and further inhibit the formation of α'-martensite. Generally, the greater the elongation of the plate and the greater the work hardening index, the more beneficial it is to the plate's stretch performance, and the better the cold forming performance. The forming performance of an austenitic alloy is closely related to the martensite transformation that occurs during forming. The addition of copper can increase the stacking fault energy of the stainless steel material and inhibit the formation of martensite during deformation of the stainless steel. Copper is a beneficial element for improving forming performance. In addition, in austenitic steel, an increase in the copper content can increase the stability of the austenite, slow down cold work hardening, and significantly improve the processing force that the material can withstand during cold working, thereby greatly improving the cold heading performance and deep drawing performance of the steel.

[0073] In one embodiment, the composition of the flexible stainless steel includes at least copper and nickel. Cu and Ni are both austenite stabilizing elements and have a positive effect on the formation and strength-plasticity balance of residual austenite. At the same time, elements such as Ni and Cu can increase the stacking fault energy of the material. Ni is the main austenite stabilizing element, and its addition expands the γ phase region. The addition of Ni also increases the potential and passivation tendency of the alloy, thereby improving the corrosion resistance of the stainless steel. Ni also has high corrosion resistance to acids and bases. Ni reduces the energy of the interaction between dislocations and interstitial atoms, thereby improving the plasticity and toughness of the stainless steel. Ni also effectively improves the cold work hardening tendency of the stainless steel and improves the cold working forming ability. This is mainly due to the increase in the stability of the austenitic structure and the reduction in the formation of martensite caused by the increase in Ni. The solid solution of Ni in austenitic stainless steel improves the thermodynamic stability of the stainless steel, making it have better corrosion resistance. Ni is the only important element for improving the transgranular corrosion resistance of austenitic stainless steel to many media.

[0074] In one of the embodiments, the flexible stainless steel pipe can be composed of the following components and their mass percentages: C: 0%~0.02%, Cu: 2%~4%, Ni: 9%~11%, Si: 0%~1%, Mn: 1%~2%, Cr: 16%~18%, Mo: 0%~0.03%, P: 0%~0.03%, and S: 0%~0.03%. Compared with common stainless steel materials, such as 304L stainless steel material, by reducing the carbon element content, increasing the nickel element content, and introducing the copper element, the goals of reducing the yield strength of the stainless steel, improving the stability of austenite, and improving the welding performance are achieved. Among them, the carbon content is less than 0.02%, which can effectively reduce the yield strength of the stainless steel, and the low C element content makes it more difficult to pass through the material sensitization interval during hot working and welding, effectively controlling the generation of M23C6, thereby realizing stronger intergranular corrosion resistance and effectively reducing welding defects; the nickel content is greater than 9% and less than 11%, which can significantly improve the stability of austenite; the copper content is 2%~4%, which can improve the copper brazing wettability, and the solid solution copper can improve the stability of austenite and reduce the yield strength of the stainless steel, the addition of Cr element and Ni element makes the flexible stainless steel material have lower pitting corrosion potential, lower pitting corrosion weight loss and lower martensite transformation temperature, so that the flexible stainless steel pipe is more difficult to appear martensite phase transformation during processing, thereby realizing stronger pitting corrosion resistance and stress corrosion resistance.

[0075] According to the distributor assembly 1000 of the embodiment of the present application, by taking at least one of the distributor 100, the branch pipe 200, and the main pipe 300 as a flexible stainless steel material piece, the installation difficulty and manufacturing difficulty between the distributor 100 and the branch pipe 200 can be reduced, thereby the assembly time of the heating system 1 can be reduced, and the production cost can also be reduced; at the same time, the risk of cracking due to vibration at the connection between the distributor 100 and the branch pipe 200 can be reduced, thereby the use reliability of the heating system 1 can be improved.

[0076] According to some embodiments of the present application, as shown in FIGS. 1 and 2, a distributor assembly 1000 is provided, which has a distributor 100, branch pipes 200, and a main pipe 300. The distributor 100 is provided with a plurality of flow holes 106, that is, the distributor 100 is provided with two, three, or four or more flow holes 106. The number of branch pipes 200 is also a plurality, that is, the number of branch pipes 200 is two, three, or four or more. The plurality of branch pipes 200 are in one-to-one correspondence with the plurality of flow holes 106 and are connected in a plug-in manner. The branch pipe 200 is connected to a plurality of heat exchange pipes 1E of a plurality of heat exchangers. The distributor 100 converges the refrigerant in the plurality of branch pipes 200 and is connected to an external pipe system 500 through the main pipe 300, so as to ensure that the refrigerant flowing into the distributor 100 can smoothly join the overall circulation process. At the same time, the connection in a plug-in manner is simple and convenient to operate, so as to improve the assembly efficiency.

[0077] For example, as shown in FIGS. 1 and 2, the distributor 100 is provided with a plurality of flow holes 106 on the upper side. The branch pipes 200 are arranged vertically. The lower end of the branch pipe 200 is connected to the flow hole 106 in a plug-in manner. The upper end of the branch pipe 200 extends upward. Further, the branch pipe 200 is welded to the position of the flow hole 106 of the distributor 100, so as to ensure the connection strength of the branch pipe 200 and the distributor 100.

[0078] Further, the branch pipe 200 is used to uniformly or as needed distribute the fluid in the main pipe to a plurality of branches. This ensures that each part that needs fluid can obtain sufficient supply. At the same time, by controlling the flow of fluid into each branch pipe 200, the pressure of each part can be adjusted, so as to ensure the pressure balance of the entire system. The branch pipe 200 is connected to the heat exchange pipe 1E of the heat exchanger, so as to uniformly distribute the amount of refrigerant received by each heat exchange pipe 1E, thereby facilitating the improvement of heat exchange efficiency.

[0079] According to some optional embodiments of the present application, as shown in FIGS. 1 and 2, the distributor 100 is provided with a distribution cavity 103 and an inflow hole 105. One end (for example, the upper end of the distribution cavity 103 shown in FIG. 2) of the distribution cavity 103 is in communication with the plurality of flow holes 106. The other end (for example, the lower end of the distribution cavity 103 shown in FIG. 2) of the distribution cavity 103 is in communication with the inflow hole 105.

[0080] According to some optional embodiments of the present application, as shown in FIGS. 1 and 2, the distributor 100 includes a main body 10 and a pipe connecting portion 20. The main body 10 is formed with the distribution cavity 103 and a plurality of flow holes 106. The plurality of flow holes 106 are formed at one end (for example, the upper end of the main body 10 shown in FIG. 2) of the main body 10. The pipe connecting portion 20 is connected to the side (for example, the lower side of the main body 10 shown in FIG. 2) of the main body 10 away from the flow holes 106. The inner side of the pipe connecting portion 20 defines the inflow hole 105.

[0081] For example, as shown in FIG. 1 and FIG. 2, the main body 10 is arranged on the upper side of the connecting pipe 20, the upper end of the main body 10 forms the shunt hole 106, the distribution cavity 103 is formed in the main body 10, and the connecting pipe 20 is a circular pipe, and the lower end of the connecting pipe 20 defines the inflow hole 105.

[0082] According to some optional embodiments of the present application, as shown in FIG. 1 and FIG. 2, the main body 10 is conical, the cross-sectional size of the outer contour of the main body 10 gradually decreases in the direction from the main body 10 to the connecting pipe 20, the shunt hole 106 is arranged on the side of the main body 10 away from the connecting pipe 20 (for example, the upper side of the main body 10 shown in FIG. 2), a plurality of shunt holes 106 are arranged at intervals along the circumferential direction of the main body 10, the distribution cavity 103 is formed in the annular shape along the circumferential direction of the main body 10, and the distribution cavity 103 extends obliquely towards the central axis of the main body 10 in the direction from the main body 10 to the connecting pipe 20.

[0083] In this way, the conical main body 10 has a reasonable structure design, the cross-sectional size of the main body 10 is the largest at the end of the main body 10 where the shunt hole 106 is arranged, so that sufficient area can be provided for the shunt hole 106, thereby ensuring the number of branch pipes 200 connected to the main body 10, and the cross-sectional size of the main body 10 is the smallest at the end of the main body 10 away from the shunt hole 106, so that the refrigerant in the distribution cavity 103 can be converged into the connecting pipe 20, thereby realizing the inflow of the refrigerant in the plurality of branch pipes 200 into the same pipeline.

[0084] For example, as shown in FIG. 1 and FIG. 2, the main body 10 is a circular cone with the cross-sectional size of the outer contour gradually decreasing from top to bottom, the shunt hole 106 is arranged on the upper side of the main body 10, the distribution cavity 103 extends obliquely towards the central axis of the main body 10 from top to bottom, and the distribution cavity 103 is formed in the annular shape inside the main body 10, so that the distribution cavity 103 can communicate with the plurality of shunt holes 106.

[0085] According to some embodiments of the present application, as shown in FIG. 1 and FIG. 2, the distributor assembly 1000 further comprises a main pipe 300, one end (for example, the upper end of the main pipe 300 shown in FIG. 2) of the main pipe 300 is connected to the connecting pipe 20. Among them, the main pipe 300 is connected to the connecting pipe 20, and is used to transport the refrigerant in the distributor 100 to a designated position.

[0086] In one embodiment, the first liquid pipe assembly 2300 or the second liquid pipe assembly 3300 is configured as the distributor assembly 1000, wherein the distributor 100 is configured as a flexible stainless steel part, and the hardness of the flexible stainless steel part is 90-120Hv, which is lower than the hardness of ordinary stainless steel (such as 304L stainless steel). The shunt hole 106 and the distribution cavity 103 of the distributor 100, and the inflow hole 105 are all processed by a drill bit, and the distributor 100 adopts a flexible stainless steel material, so that the wear of the drill bit can be reduced, which is beneficial to manufacturing and processing.

[0087] In one embodiment, the first liquid pipe assembly 2300 or the second liquid pipe assembly 3300 is configured as the distributor assembly 1000, wherein the plurality of branch pipes 200 is configured as flexible stainless steel, the yield strength and tensile strength of the flexible stainless steel is lower than that of the general stainless steel material (such as 304L stainless steel), higher than that of copper, and the elongation and hardness of the flexible stainless steel is close to that of copper and far lower than that of the general stainless steel material (such as 304L stainless steel). The flexible stainless steel pipe involved in the present application has the processing performance of flanging, bending, flaring, necking and the like close to that of copper pipe due to its lower yield strength and higher elongation. At the same time, the adjacent branch pipes 200 are prone to pipe grinding and thus pipe rupture due to the small pipe diameter, large number and concentrated installation position of the branch pipes 200. The yield strength and tensile strength of the flexible stainless steel is higher than that of copper, so as to reduce the probability of pipe damage due to pipe grinding. In addition, the branch pipe 200 made of flexible stainless steel can be bent like a copper branch pipe due to its lower yield strength and higher elongation, and when the plurality of branch pipes 200 are respectively and sequentially welded and fixed to the heat exchange pipes 1E of the heat exchanger, the branch pipe 200 at a relatively late welding sequence can be flexibly adjusted to be connected to the corresponding heat exchange pipe 1E of the heat exchanger. In addition, the anti-vibration performance of the flexible stainless steel is better than that of copper. The copper branch pipe is prone to short pipe due to vibration because of the small pipe diameter and long length. The existing solution is to fix the plurality of branch pipes by a binding belt to prevent the slender copper branch pipe from breaking. The branch pipe 200 of the present embodiment is configured as flexible stainless steel, and the anti-vibration capability thereof is better than that of copper, so that no additional binding belt is needed for fixation, thereby reducing the installation cost.

[0088] In one embodiment, the first liquid pipe assembly 2300 or the second liquid pipe assembly 3300 is configured as the distributor assembly 1000, and the main pipe 300 is a copper pipe, a copper alloy pipe or a flexible stainless steel pipe. It can be understood that the main pipe 300 can be a copper pipe, a copper alloy pipe or a flexible stainless steel pipe.

[0089] The copper pipe and the copper alloy pipe have better heat conduction performance, so that the use of the copper pipe or the copper alloy pipe for the main pipe 300 is beneficial to the transmission of the refrigerant in the air conditioning system.

[0090] The flexible stainless steel pipe has better strength and higher toughness, so that the use of the flexible stainless steel pipe for the main pipe 300 can make the main pipe 300 have a higher bending limit, thereby making it easier to arrange the distributor assembly 1000 in the arrangement space during the design of the heating and ventilation system 1, so as to reduce the design difficulty of the heating and ventilation system 1.

[0091] When the main pipe 300 is made of flexible stainless steel, the flexible stainless steel is a kind of flexible stainless steel material with high ductility and flexibility, which can adapt to complex shape changes and bending requirements without losing its corrosion resistance and mechanical strength. Even after a complex forming process, it still maintains good mechanical strength and pressure resistance. The flexible stainless steel is convenient for bending, welding and connecting processing operations. Thus, the welding connection of the main pipe 300 and the connecting pipe portion 20 can be facilitated.

[0092] According to some embodiments of the present application, the Md30 of the flexible stainless steel is -50℃ to -80℃. In the field of flexible stainless steel materials, "Md30" refers to the critical temperature of martensitic transformation. Specifically, "Md30" is the temperature at which 50% of martensite is generated at a deformation of 30%. This parameter is very important for predicting the behavior of flexible stainless steel during processing, because the formation of martensite will affect the hardness and magnetism of the material. Generally, the lower the "Md30" value, the more difficult it is for the material to form martensite under the same deformation conditions, and therefore the material has better resistance to aging cracking, i.e., it is less likely to crack. On the contrary, if the "Md30" value is high, the material is more likely to produce martensite during processing, which may cause cracking. Therefore, by making the critical temperature of martensitic transformation of the flexible stainless steel meet the above conditions, the dispenser assembly 1000 can work well in a low temperature environment with good stability.

[0093] According to some embodiments of the present application, the flexible stainless steel is an austenitic flexible stainless steel, and the average grain size of the flexible stainless steel is 20μm to 40μm. Thus, the austenitic flexible stainless steel with a grain size of 20μm to 40μm not only maintains the good corrosion resistance and processability inherent to austenitic flexible stainless steel, but also obtains better mechanical properties and potentially longer service life due to grain refinement.

[0094] According to some embodiments of the present application, the wall thickness of the flexible stainless steel pipe is 1.2mm to 1.5mm. This can prevent the wall thickness of the flexible stainless steel pipe from being too small, which is conducive to ensuring the mechanical strength and pressure resistance of the flexible stainless steel pipe, while also ensuring the ductility of the flexible stainless steel pipe, so that it can adapt to complex shape changes and bending requirements. At the same time, it can also prevent the wall thickness of the flexible stainless steel pipe from being too large, thereby reducing the cost of the flexible stainless steel pipe, and thus reducing the production cost of the entire dispenser assembly 1000.

[0095] According to some embodiments of the present application, as shown in FIG. 2, the total pipe 300 is connected with the adapter 20 by plug-in connection, and the insertion depth H of the total pipe 300 is 5mm-20mm. In this way, the insertion depth of the total pipe 300 and the adapter 20 can not be too small, which is beneficial to improve the contact area of the total pipe 300 and the adapter 20, and thus can increase the sealing effect of the total pipe 300 and the adapter 400; at the same time, the insertion depth of the total pipe 300 and the adapter 20 can not be too large, and thus the use of materials and unnecessary stress concentration can be reduced, thereby the service life of the dispenser assembly 1000 can be increased.

[0096] For example, the insertion depth of the total pipe 300 can be 5mm, 10mm, 15mm or 20mm. Further, the total pipe 300 can be a flexible stainless steel pipe. The flexible stainless steel is a kind of flexible stainless steel material with high ductility and flexibility, which can adapt to complex shape changes and bending requirements without losing its corrosion resistance and mechanical strength. Even after a complex forming process, it can still maintain good mechanical strength and pressure resistance. The flexible stainless steel is convenient for bending, welding and connecting and other processing operations.

[0097] According to some embodiments of the present application, as shown in FIG. 2, the total pipe 300 is connected with the adapter 20 by plug-in connection, and the fitting gap L of the total pipe 300 and the adapter 20 is 0.1mm-0.2mm. In this way, the fitting gap of the total pipe 300 and the adapter 20 can not be too small, and thus the smoothness and efficiency of the assembly process can be ensured; at the same time, the fitting gap of the total pipe 300 and the adapter 20 can not be too large, which is beneficial to reduce the material required for sealing the total pipe 300 and the adapter 20.

[0098] For example, the fitting gap of the total pipe 300 and the adapter 20 can be 0.1mm, 0.15mm or 0.2mm.

[0099] According to some embodiments of the present application, the total pipe 300 is connected with the adapter 20 by welding. The welding connection has high strength and good sealing, and thus the total pipe 300 and the adapter 20 are connected by welding, which can improve the connection stability and sealing of the total pipe 300 and the adapter 20, and thus ensure the overall sealing of the dispenser assembly 1000.

[0100] Optionally, when the material of the main pipe 300 is different, the solder required when the distributor 100 is welded with the main pipe 300 is also different. For example, when the main pipe 300 is a copper pipe or a copper alloy pipe, the distributor 100 is flexible stainless steel, and the inner wall material of the inflow hole 105 is also flexible stainless steel, the composition and mass percentage of the solder required when the distributor 100 is welded with the main pipe 300 are as follows: Cu: 57%-61%, Sn: 1.0%-1.5%, Si: 0.05%-0.2%, and the remaining components are Zn; the melting temperature range is 880-890°C, and the recommended brazing temperature is 920-930°C. The composition and percentage of the flux are as follows: boric acid: 60%-80%, fluoride: 5%-15%, and potassium borate: 10%-20%.

[0101] For example, when the main pipe 300 and the distributor 100 are both flexible stainless steel pipes, the composition and mass percentage of the solder required when the distributor 100 is welded with the main pipe 300 are as follows: Cu: 46%-50%, Ni: 9%-11%, Si: 0.04%-0.25%, and the remaining components are Zn and unavoidable impurities; the melting temperature range is 910-935°C, and the recommended brazing temperature is 950-975°C. The composition and mass percentage of the flux are as follows: boric acid: 60%-80%, fluoride: 5%-15%, and potassium borate: 10%-20%.

[0102] For example, when the main pipe 300 and the distributor 100 are both flexible stainless steel pipes, the composition and mass percentage of the solder required when the distributor 100 is welded with the main pipe 300 are as follows: Cu: 46%-50%, Ni: 9%-11%, Si: 0.04%-0.25%, and the remaining components are Zn and unavoidable impurities; the melting temperature range is 910-935°C, and the recommended brazing temperature is 950-975°C. The composition and mass percentage of the flux are as follows: boric acid: 60%-80%, fluoride: 5%-15%, and potassium borate: 10%-20%.

[0103] According to some embodiments of the present application, as shown in FIG. 5, the distributor assembly 1000 further comprises an adapter pipe 400 connected between the main pipe 300 and the external pipe 500.

[0104] It should be noted that generally, the main pipe 300 is welded to the external pipe 500 through the adapter pipe 400, and when the main pipe 300 is made of flexible stainless steel material and the external pipe 500 is made of copper pipe or copper alloy pipe, the adapter pipe 400 between the main pipe 300 and the external pipe 500 is a copper sleeve. The adapter pipe 400 is a copper sleeve, which can realize the manual welding of the distributor assembly 1000 and the external pipe 500 in the workshop, facilitate the installation and welding in the workshop, and ensure the welding stability of the distributor 100 and the main pipe 300. The external pipe 500 can be the liquid side pipe 82 of the indoor unit 1B, or the pipe between the second liquid pipe assembly 3300 and the liquid side stop valve 93 in the heat source unit 1A.

[0105] When the diameters or shapes of the two connected components do not match, the adapter pipe 400 can be used as an intermediary to realize the transition between different sizes or types of interfaces, so that external pipes 500 of various sizes can be connected to the main pipe 300, thereby improving the versatility of the distributor assembly 1000. At the same time, using the adapter pipe 400 can easily replace or add components without changing the original system, thereby improving the maintainability and flexibility of the heating system 1, and facilitating the maintenance and replacement of the entire distributor assembly 1000.

[0106] Further, as shown in FIGS. 5 and 6, when the external pipe 500 is made of stainless steel material (including the flexible stainless steel material of the present application and the common stainless steel material), the adapter pipe 400 includes a first adapter pipe 410 and a second adapter pipe 420, which are welded together, the first adapter pipe 410 is welded to the main pipe 300, and the second adapter pipe 420 is welded to the external pipe 500.

[0107] Further, the flexible stainless steel material is composed of the following components and their mass percentages: C: 0.02% or less, Si: 0.5% to 1%, Mn: 1% to 2%, Cr: 16% to 18%, Ni: 9% to 11%, Cu: 2% to 4%, Mo: 0 to 0.02%, P: 0.03% or less, S: 0.03% or less, and the remainder is composed of Fe and unavoidable impurities. The addition of Cu element reduces the yield strength of the flexible stainless steel material to 140 MPa to 180 MPa, the tensile strength to 400 MPa to 600 MPa, the elongation to 50% to 80%, the yield strength ratio to less than 0.4, and the hardness to 90 Hv to 120 Hv. The addition of Cr element and Ni element makes the flexible stainless steel material have lower pitting corrosion potential, lower pitting corrosion weight loss, and lower martensite transformation temperature, so that the flexible stainless steel material is more difficult to undergo martensite phase transformation during processing, thereby achieving stronger pitting corrosion resistance and stress corrosion resistance.

[0108] It needs to be further explained that the flexible stainless steel material involved in the present application has a lower C element content, which makes it more difficult to pass through the material sensitization interval during hot working and welding, effectively controls the generation of M23C6, thereby realizing stronger intergranular corrosion resistance, and can effectively reduce welding defects.

[0109] According to some embodiments of the present application, as shown in FIG. 2, one side of the main body 10 facing the branch pipe 200 (such as the upper side of the main body 10 shown in FIG. 2) is provided with a weight reduction groove 107 recessed towards the adapter 20. Thus, the weight of the main body 10 can be reduced, facilitating the transportation of the dispenser 100, while the material used by the dispenser 100 can be reduced, thereby reducing the production cost.

[0110] The dispenser assembly 1000 according to two specific embodiments of the present application will be described below with reference to FIGS. 1-6.

[0111] Referring to FIG. 2, the dispenser assembly 1000 includes a dispenser 100, a branch pipe 200, an adapter pipe 400, and a main pipe 300, and the dispenser 100 is a flexible stainless steel material piece.

[0112] Specifically, the dispenser 100 includes a main body 10 and an adapter 20, the main body 10 is arranged on the upper side of the adapter 20, the main body 10 is formed with a distribution cavity 103, an inflow hole 105, and a plurality of distribution holes 106, the number of the branch pipes 200 is multiple, the plurality of branch pipes 200 are in one-to-one correspondence with the plurality of distribution holes 106 and are connected in a plug-in manner, the upper end of the distribution cavity 103 is in communication with the plurality of distribution holes 106 and the lower end is in communication with the inflow hole 105, the upper end of the adapter 20 is in communication with the inflow hole 105, and the lower end of the adapter 20 is connected with other structures.

[0113] The main body 10 is conical, the cross-sectional size of the outer contour of the main body 10 gradually decreases in the direction from the main body 10 to the adapter 20, the plurality of distribution holes 106 are arranged in a spaced manner along the circumferential direction of the main body 10, the distribution cavity 103 is formed in an annular shape along the circumferential direction of the main body 10, and the distribution cavity 103 extends in a direction inclined to the central axis of the main body 10 in the direction from the main body 10 to the adapter 20.

[0114] The upper end of the main pipe 300 is connected with the lower end of the adapter 20, the main pipe 300 is connected with the adapter 20 in a plug-in manner, the insertion depth of the main pipe 300 is 5mm-20mm, the fitting gap between the main pipe 300 and the adapter 20 is 0.1mm-0.2mm, and the main pipe 300 is a copper pipe or a copper alloy pipe. The adapter pipe 400 is connected between the adapter 20 and the main pipe 300, the adapter pipe 400 is a copper sleeve, and the main pipe 300 and the adapter 20 are connected in a welding manner.

[0115] The adapter pipe 400 is provided between the main pipe 300 and the external pipe 500, and when the external pipe 500 is made of stainless steel, the adapter pipe 400 comprises a first adapter pipe 410 and a second adapter pipe 420, the first adapter pipe 410 and the second adapter pipe 420 are welded together, the first adapter pipe 410 is welded to the main body 10, and the second adapter pipe 420 is welded to the main pipe 300.

[0116] The end 200a of the branch pipe 200 is provided with a first adapter 60, the material of the branch pipe 200 is flexible stainless steel, the material of the first adapter 60 is copper or copper alloy, and the first adapter 60 is connected to the heat exchange pipe 1E of the heat exchanger. The heat exchanger can be the first heat exchanger 2000 or the second heat exchanger 3000.

[0117] Further, the flexible stainless steel is austenitic stainless steel, and the average grain size of the flexible stainless steel is 20-40 μm.

[0118] The flexible stainless steel is composed of the following components in percentage by weight: C: 0.02% or less, Si: 0.5%-1%, Mn: 1-2%, Cr: 16-18%, Ni: 9-11%, Cu: 2-4%, Mo: 0-0.02%, P: 0.03% or less, S: 0.03% or less, and the rest is Fe and inevitable impurities. The Md30 of the flexible stainless steel is -50°C to -80°C.

[0119] The yield strength of the flexible stainless steel is 140-180 MPa, the tensile strength is 400-600 MPa, the elongation is 50-80%, the yield strength ratio is less than 0.4, and the hardness is 100-120 Hv.

[0120] The wall thickness of the flexible stainless steel pipe is 1.2-1.5 mm.

[0121] When the two components to be welded to each other are both made of flexible stainless steel, they are welded together by the first solder, as shown in Figs. 3 and 4, wherein X represents the first solder.

[0122] The first solder contains Cu: 46%-50%, Ni: 9%-11%, Si: 0.04%-0.25%, and the rest is Zn and inevitable impurities, in percentage by weight;

[0123] The flux used with the first solder contains boric acid 60%-80%, fluoride 5%-15%, and potassium borate 10%-20%, in percentage by weight;

[0124] The melting temperature t1 of the first solder satisfies 910°C≤t1≤935°C.

[0125] The brazing temperature t2 when the first solder is used satisfies: 950℃≤t2≤975℃.

[0126] The two components to be welded to each other can be the branch pipe 200 and the hole wall of the flow distribution hole 106, or the main pipe 300 and the hole wall of the inflow hole 105, or the main pipe 300 and the copper pipe.

[0127] When one of the two components to be welded to each other is a flexible stainless steel material and the other is copper or a copper alloy, as shown in FIGS. 3 and 4, X represents the second solder, wherein the second solder contains Cu: 57%-61%, Sn: 1.0%-1.5%, Si: 0.05%-0.2% in Wt%, and the rest is composed of Zn and inevitable impurities;

[0128] The flux used when the second solder is used contains boric acid 60%-80%, fluoride 5%-15%, and potassium borate 10%-20% in Wt%;

[0129] The melting temperature t1 when the second solder is used satisfies: 880℃≤t1≤890℃;

[0130] The brazing temperature t2 when the second solder is used satisfies: 920℃≤t2≤930℃.

[0131] The two components to be welded to each other can be one end 200a of the branch pipe 200 and the first adapter 60, or the other end of the branch pipe 200 and the hole wall of the flow distribution hole 106, or the main pipe 300 and the hole wall of the inflow hole 105, or the main pipe 300 and the copper pipe, which can be the first adapter pipe 410 or the external pipe 500.

[0132] According to the distributor assembly 1000 of the embodiment of the present application, by setting one of the distributor 100 and the branch pipe 200 as a flexible stainless steel material, the installation difficulty between the distributor 100 and the branch pipe 200 can be reduced, and thus the assembly time of the heating and ventilation system can be reduced, and the production cost can also be reduced. Meanwhile, the risk of cracking at the connection between the distributor 100 and the branch pipe 200 due to vibration can be reduced, and thus the use reliability of the heating and ventilation system can be improved.

[0133] As shown in FIGS. 8-14, the present application proposes a second distributor assembly 1000,

[0134] As shown in FIGS. 8-11, the overall design of the distributor assembly 1000 includes a distributor 100 and branch pipes 200. The distributor 100 includes a main body 10 having an inflow hole 105 and a plurality of distribution holes 106 in communication with the inflow hole 105. Each of the distribution holes 106 corresponds to a branch pipe 200.

[0135] Specifically, by providing the first flange 210 on the branch pipe 200, the welding area of the branch pipe 200 and the distributor 100 is increased, and the welding reliability is improved, thereby solving the problem of poor reliability of the lap joint structure of the existing distributor and the distribution pipe. Meanwhile, by providing the first flange 210 on the branch pipe 200, the distributor 100 does not need to be provided with a structure for cooperating with the branch pipe 200, which helps to simplify the structure of the distributor 100 and reduce the structural requirements of the distributor 100.

[0136] It should be understood that in the present embodiment, the distributor 100 is in a columnar structure, one end of the distributor 100 is provided with an inflow hole 105, and the other end of the distributor 100 is provided with a mounting surface provided with a plurality of distribution holes 106 in communication with the inflow hole 105. Meanwhile, the branch pipe 200 has a first end close to the distributor 100 and a second end away from the distributor 100, and a plurality of branch pipes 200 are provided corresponding to a plurality of distribution holes 106. The first end of the branch pipe 200 is provided with a first flange 210, which is provided on the outer side of the branch pipe 200 and extends in the radial direction of the branch pipe 200. The end of the first flange 210 facing the distributor 100 has an active surface abutting the mounting surface, at this time, the first flange 210 and the distributor 100 can be welded and fixed, and the branch pipe 200 and the corresponding distribution hole 106 are concentrically arranged. The provision of the first flange 210 increases the welding area of the branch pipe 200 and the distributor 100, improves the connection effect between the distributor 100 and the branch pipe 200, helps to improve the service life of the distributor assembly 1000, and further improves the service life of the heating and ventilation system 1, reduces the maintenance frequency of the heating and ventilation system 1 in use, and improves the use effect of the heating and ventilation system 1.

[0137] It should be pointed out that in the present embodiment, the plurality of distribution holes 106 are arranged around the axis of the distributor 100 and are spaced apart, and the first flanges 210 of the plurality of branch pipes 200 are spaced apart, so as to ensure a good welding space.

[0138] In addition, the first flange 210 can be square, circular, oval, triangular, pentagonal, hexagonal, diamond-shaped, etc., so as to increase the welding area.

[0139] Further, the main body 10 includes a shell 11 and a plate body 12. The shell 11 has a distribution cavity 103 in communication with the inflow hole 105. The plate body 12 is connected to the shell 11 and is located on the side of the distribution cavity 103 away from the inflow hole 105. The plate body 12 is provided with a plurality of shunt holes 106, and the plurality of shunt holes 106 are arranged around the inflow hole 105.

[0140] Specifically, by limiting the main body 10 of the distributor 100 to have the distribution cavity 103, the flow rate of the refrigerant entering the distribution cavity 103 from the inflow hole 105 can be slowed down, so as to enable preliminary mixing. At the same time, by limiting the plurality of shunt holes 106 to be arranged around the inflow hole 105, the paths of the refrigerant flowing from the inflow hole 105 to each shunt hole 106 are the same, which helps to ensure the content of the refrigerant flowing to each shunt hole 106, and further ensures the shunting effect of the distributor 100.

[0141] It should be understood that, as shown in FIGS. 8-13, the shell 11 is in the shape of a circular tube as a whole. The bottom of the shell 11 defines the inflow hole 105, and the inside of the shell 11 defines a shunt cavity, which is open. In the present embodiment, the shunt cavity includes the distribution cavity 103 and the mounting cavity 104. The two ends of the distribution cavity 103 are respectively provided with the inflow hole 105 and the mounting cavity 104. From the direction of the inflow hole 105 facing the mounting cavity 104, i.e. the flow direction of the refrigerant, the inner diameter of the distribution cavity 103 gradually increases. Optionally, the distribution cavity 103 is provided in a hemispherical structure. The minimum inner diameter of the distribution cavity 103 is the same as the hole diameter of the inflow hole 105, and the maximum inner diameter of the distribution cavity 103 is the same as the hole diameter of the mounting cavity 104. The mounting cavity 104 is in communication with the outside and forms the opening of the shunt cavity. The refrigerant entering the distribution cavity 103 from the inflow hole 105 changes the flow direction due to the change in the flow space, which can mix the refrigerant in the distribution cavity 103 on the one hand, thereby improving the mixing effect. On the other hand, the change in the hole diameter of the distribution cavity 103 can guide the flow of the refrigerant, and further cooperate with the shunt hole 106 described below to ensure that the refrigerant uniformly and quickly flows to the shunt hole 106.

[0142] In the embodiment, the plate body 12 is in a circular plate structure, and the plate body 12 is adapted to be arranged in the mounting cavity 104, and at this time, the plate body 12 and the inflow hole 105 are adapted to be arranged on opposite sides of the distribution cavity 103, and the axis of the plate body 12 is in line with the axis of the inflow hole 105. At the same time, a plurality of distribution holes 106 are formed on the plate body 12, and the plurality of distribution holes 106 are arranged around the axis of the plate body 12. By limiting the axis of the plate body 12 to be in line with the axis of the inflow hole 105, in combination with the structure of the distribution cavity 103, the uniform flow of the refrigerant to each distribution hole 106 can be further ensured, and the uniformity of the refrigerant can be ensured in achieving the effect of refrigerant distribution.

[0143] It should be noted that in the embodiment, the shell 11 can be made by spinning, roll welding or punching at both ends. At the same time, the plate body 12 is fixed in the mounting cavity 104 of the shell 11 by welding.

[0144] In addition, in the embodiment, the shell 11 includes a main shell portion 111 and a mounting portion 112, wherein the interior of the main shell portion defines a distribution cavity 103 for distributing and mixing the refrigerant. The mounting portion 12 is located on one side of the main shell portion 111 for mounting the plate body 12 or other components described below, and the interior of the mounting portion 12 defines a mounting cavity 104, and the hole diameter of the mounting cavity 104 is the same as the maximum inner diameter of the distribution cavity 103.

[0145] In addition, the side of the plate body 12 away from the distribution cavity 103 is the top surface, i.e. the mounting surface described above. Alternatively, the mounting surface is in the same plane as the top end surface of the shell 11. In another alternative, the mounting surface is parallel to the top end surface of the shell 11, and the plate body 12 is accommodated inside the mounting cavity 104, and at this time, the mounting surface and the top end of the shell 11 define a welding space for accommodating the first flange 210 of the branch pipe 200, thereby ensuring the welding effect of the branch pipe 200 and the plate body 12.

[0146] In addition, the structure of the shell 11 can be other shapes such as a square tube, in addition to the above-mentioned circular tube structure, so as to be able to ensure the mounting and fixing of the distribution cavity 103 and the plate body 12.

[0147] Further, the distributor assembly 1000 further comprises a distribution cone 40 arranged on the plate body 12, and the axis of the distribution cone 40 is in line with the axis of the inflow hole 105, and the distribution cone 40 is used to guide the fluid from the inflow hole 105 to the distribution hole 106.

[0148] Specifically, by setting the flow distribution cone 40, a flow guiding surface can be formed in the flow distribution cavity, so that the refrigerant can flow uniformly to each flow distribution hole 106 under the action of the flow distribution cone 40 after entering the distribution cavity 103, thereby ensuring the flow distribution effect of the distributor assembly 1000. At the same time, the setting of the flow distribution cone 40 can also cooperate with the structure of the distribution cavity 103 to further improve the flow distribution effect of the distributor 100.

[0149] It should be understood that, as shown in FIGS. 9, 10, 12 and 13, the plate body 12 is provided with a flow distribution cone 40, the taper line of the flow distribution cone 40 is located on the same straight line as the axis of the inflow hole 105, and at this time, a plurality of flow distribution holes 106 are arranged along the circumference of the flow distribution cone 40 and are spaced apart from the flow distribution cone 40. In this embodiment, the flow distribution cone 40 has a small-diameter end and a large-diameter end, wherein the large-diameter end is arranged in connection with the plate body 12. Alternatively, the small-diameter end is arranged in the distribution cavity 103 and corresponds to the inflow hole 105, at this time, the refrigerant entering the distribution cavity 103 from the inflow hole 105 will impact the small-diameter end of the flow distribution cone 40, and under the action of the taper surface of the flow distribution cone 40, flow to each flow distribution hole 106, which helps to ensure the uniformity and rapidity of the refrigerant flow.

[0150] It should be pointed out that, in addition to arranging the small-diameter end in the distribution cavity 103, the small-diameter end can also be arranged on the side away from the distribution cavity 103, i.e. the small-diameter end is arranged inside the mounting cavity 104. At this time, the flow distribution cone 40 is hollowed out inside to form a tapered flow guiding space. The refrigerant entering the distribution cavity 103 from the inflow hole 105 will impact the small-diameter end of the flow distribution cone 40, and under the action of the taper surface of the flow distribution cone 40, flow to each flow distribution hole 106, since the inflow hole 105 and the small-diameter end are located on the same straight line, the flow guiding space is on the same horizontal plane, and the pressure at each place is the same or similar, thereby helping to ensure the uniformity of the refrigerant flow.

[0151] It should be further understood that the flow distribution cone 40 and the plate body 12 are an integral molded part. By arranging the flow distribution cone 40 and the plate body 12 as an integral molded part, it helps to reduce the manufacturing and assembly difficulty of the distributor 100. As shown in FIG. 11, in this embodiment, the flow distribution cone 40 and the plate body 12 are integrally stamped and molded. The structure is simple and convenient to manufacture. Alternatively, the flow distribution cone 40 is hollowed out inside, which helps to reduce the manufacturing cost of the distributor 100 and ensure the flow guiding effect of the flow distribution cone 40.

[0152] In some other embodiments of the present application, the flow distribution cone 40 and the plate body 12 are in a split structure. Specifically, the middle part of the plate body 12 is provided with a relief hole 121, the flow distribution cone 40 is arranged in the relief hole 121, and the small-diameter end of the flow distribution cone 40 is located in the distribution cavity 103. Arranging the flow distribution cone 40 in the relief hole 121 of the plate body 12 and welding the flow distribution cone 40 and the plate body 12 together. In this way, on the one hand, it helps to adjust the insertion depth of the flow distribution cone 40, ensures the spacing between the flow distribution cone 40 and the inflow hole 105, and helps to improve the applicability of the distributor 100 and adjust the flow distribution effect. On the other hand, the flow distribution cone 40 can be arranged in different structures such as a cone, a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid, etc. to adapt to the number of flow distribution holes 106, ensure the flow distribution effect, and at the same time, help to improve the diversity of the flow distribution cone 40, thereby improving the applicability of the distributor 100.

[0153] It should be understood that, as shown in FIG. 13, the flow distribution cone 40 includes a cone body 41, an extension segment 42, and a second flange 43. From the direction of the inflow hole 105 towards the plate body 12, the cone body 41, the extension segment 42, and the second flange 43 are connected in sequence. Among them, the extension segment 42 is adapted to the inner wall of the relief hole 121. Optionally, the cone body 41 is arranged inside the distribution cavity 103, and the second flange 43 is connected to the side of the plate body 12 away from the distribution cavity 103. By arranging the extension segment 42, the sealing connection between the plate body 12 and the flow distribution cone 40 can be achieved by cooperating with the relief hole 121. At the same time, the arrangement of the second flange 43 helps to further improve the sealing effect of the plate body 12 and the flow distribution cone 40. On the other hand, it also improves the assembly efficiency of the plate body 12 and the flow distribution cone 40, thereby improving the assembly effect of the distributor 100. Thirdly, the second flange 43 can increase the welding area of the flow distribution cone 40 and the plate body 12, thereby further improving the connection effect of the flow distribution cone 40 and the plate body 12.

[0154] It should be pointed out that when the cone body 41 of the flow distribution cone 40 is arranged in the mounting cavity 104, the second flange 43 is connected to the side of the plate body 12 facing the distribution cavity 103. At this time, the welding position of the flow distribution cone 40 and the plate body 12 is the connection between the cone body 41 and the plate body 12. In this way, it helps to reduce the influence of welding on the flow of refrigerant, so as to ensure the effect of the flow distribution cone 40.

[0155] In addition, the flow distribution cone 40 can also be composed of only the cone body 41 and the extension segment 42. At this time, optionally, the end face of the end of the extension segment 42 away from the cone body 41 is in the same plane as the mounting surface, so as to ensure the convenience of welding. Of course, in addition to this, the end face of the end of the extension segment 42 away from the cone body 41 can also be parallel to the mounting surface, that is, the extension segment 42 protrudes to the side of the plate body 12 away from the distribution cavity 103, or the extension segment 42 is arranged inside the relief hole 121.

[0156] Further, the branch pipe 200 is a rigid member. Specifically, by defining the branch pipe 200 as a rigid member, it is helpful to realize the automatic welding of the branch pipe 200 and the plate body 12, and also helpful to realize the processing and manufacturing of the first flange 210, and guarantee the structural strength of the branch pipe 200. Since a plurality of branch pipes 200 can be respectively connected with a plurality of connecting ports of the first heat exchanger 2000, it is helpful to realize the automatic welding of the branch pipe 200 and the first heat exchanger 2000, and further helpful to prevent the problem of rebound after the connection of the branch pipe 200.

[0157] It should be understood that, as shown in FIGS. 9-11, the branch pipe 200 includes a pipe body 220 and a first flange 210. In the present embodiment, the pipe body 220 is a rigid member, and the pipe body 220 is arranged along a unique preset path, i.e., a plurality of branch pipes 200 are arranged along different preset paths, respectively. One end of the pipe body 220 is provided with the first flange 210, and the other end of the pipe body 220 is provided with the first adapter 60. The first flange 210 is integrally formed with the pipe body 220, and the first adapter 60 is detachably connected with the pipe body 220. By arranging the pipe body 220 as a rigid member, it is helpful to prevent the rebound of the branch pipe 200 after being inserted into the heat exchanger. At this time, the overall structure of the branch pipe 200 is simple, and the processing and manufacturing are simple and low in cost. The size of the distributor 100 can be reduced, the requirement for the structural space is small, the design space is saved, and the lightweight design is realized.

[0158] In the present embodiment, the first adapter 60 is inserted on the branch pipe 200, and the first adapter 60 is adaptively connected with the connecting port of the heat exchange pipe 1E of the first heat exchanger 2000 or the second heat exchanger 3000. The connection mode includes, but is not limited to, screw connection, clamping, buckle connection, riveting, bonding, welding, etc. Alternatively, the first adapter 60 and the connecting port of the heat exchange pipe 1E are fixed by welding.

[0159] It should be pointed out that the material of the first adapter 60 is the same as that of the connecting port, which is helpful to improve the connection effect of the first adapter 60 and the connecting port, thereby guaranteeing the stability of the connection. The material of the first adapter 60 can be the same as or different from that of the branch pipe 200, which is not limited here. Alternatively, the first adapter 60 is a brass piece, a stainless steel piece, etc.

[0160] Further, the diameter of the flow distribution hole 106 is smaller than the inner diameter of the branch pipe 200. Specifically, by limiting the diameter of the flow distribution hole 106 to be smaller than the inner diameter of the branch pipe 200, the flow direction of the refrigerant can be changed due to the increase of the flow space after entering the branch pipe 200, thereby helping to improve the mixing effect of the refrigerant. Optionally, the diameter of the flow distribution hole 106 is 0.4-0.8 times the inner diameter of the branch pipe 200. Optionally, the diameter of the flow distribution hole 106 is 0.5 times the inner diameter of the branch pipe 200. Since the flow distribution hole 106 is concentrically arranged with the branch pipe 200, the flow of the refrigerant can be more uniform, and the mixing effect is better.

[0161] Further, the distributor 100 has a connecting pipe portion 20 defining the inflow hole 105, and the distributor assembly 1000 further includes a main pipe 300 sleeved outside the connecting pipe portion 20.

[0162] Specifically, by arranging the connecting pipe portion 20 on the distributor 100 to be able to be connected with the main pipe 300, the assembly difficulty of the distributor assembly 1000 can be reduced, and the assembly efficiency of the distributor assembly 1000 can be improved.

[0163] It should be understood that, as shown in FIGS. 8-13, the bottom of the distributor 100 is outwardly convex and forms the connecting pipe portion 20, the inside of the connecting pipe portion 20 defines the inflow hole 105, and the main pipe 300 is sleeved outside the connecting pipe portion 20. In this embodiment, the main pipe 300 includes an inlet pipe 310, the inside of the inlet pipe 310 defines a cavity including an incident cavity 101 and a connecting cavity (not labeled in the figure). The incident cavity 101 is used for the inflow of the refrigerant, and the connecting cavity is sleeved outside the connecting pipe portion 20 to enable the refrigerant flowing through the incident cavity 101 to enter the distribution cavity 103 through the inflow hole 105.

[0164] In this embodiment, the inner diameter of the incident cavity 101 is larger than the inner diameter of the connecting cavity, and a transition cavity (not labeled in the figure) is further arranged between the incident cavity 101 and the connecting cavity to enable the refrigerant to enter the inflow hole 105, and at this time, along the flow path of the refrigerant, the inlet pipe 310 cooperates with the distributor 100 to form the incident cavity 101, the steady flow cavity 102 (inflow hole 105), and the distribution cavity 103 connected in sequence. By limiting the inner diameters of the incident cavity 101, the steady flow cavity 102, and the distribution cavity 103, the inlet pipe 310 cooperates with the main body 10 and the connecting pipe portion 20 to form a Venturi structure to increase the flow rate by reducing the flow area, thereby generating a low-pressure area at the throat. The change of the flow rate of the refrigerant helps to further improve the mixing effect of the refrigerant and the flow rate of the refrigerant flowing to each flow distribution hole 106, thereby ensuring the distribution effect of the distributor assembly 1000.

[0165] It should be noted that in addition to sleeving the inlet pipe 310 on the outside of the connecting pipe portion 20, the inlet pipe 310 can also be inserted inside the inflow hole 105 near one end of the distribution cavity 103. Of course, in addition to the insertion method, other methods such as screwing, flange connection, welding, etc. can also be used. Alternatively, a plurality of welding pieces are provided at the connection between the inlet pipe 310 and the connecting pipe portion 20 to further improve the connection effect of the inlet pipe 310 of the manifold 300 and the connecting pipe portion 20.

[0166] In addition, the inlet pipe 310 and the main body 10 and the connecting pipe portion 20 can be provided as an integral molded part. In this way, the structural strength of the distributor assembly 1000 is improved, and the assembly efficiency of the distributor assembly 1000 is improved.

[0167] Further, the manifold 300 further comprises an inlet pipe 310 and a second adapter 70. The inlet pipe 310 is sleeved on the connecting pipe portion 20, and the inlet pipe 310 has an incident cavity 101, and the inner diameter of the incident cavity 101 is greater than the inner diameter of the inflow hole 105. The second adapter 70 is inserted at one end of the inlet pipe 310 away from the inflow hole 105.

[0168] Specifically, by providing the inlet pipe 310, the distributor assembly 1000 can form a Venturi structure at the connection between the manifold 300 and the shell 10, so as to improve the flow rate of the refrigerant after entering the distributor 100 from the manifold 300, and cooperate with the flow splitting cone 40 to improve the flow splitting and mixing effect of the refrigerant. At the same time, the second adapter 70 is provided, so that the inlet pipe 310 can be in communication with other connection structures, and the second adapter 70 is changed in material to realize the insertion and welding fixation of the inlet pipe 310 and other connection structures. If necessary, the applicability of the inlet pipe 310 is improved, and the applicability of the distributor assembly 1000 is improved.

[0169] It should be understood that the manifold 300 comprises an inlet pipe 310 and a flow pipe (not shown in the figure), and in the present embodiment, the inlet pipe 310 and the flow pipe are connected through the second adapter 70. The second adapter 70 is inserted in the inlet pipe 310, and the second adapter 70 and the inlet pipe 310 are made of the same material, and by providing a welding point at the connection between the second adapter 70 and the inlet pipe 310, the connection effect of the second adapter 70 and the inlet pipe 310 can be further improved. The inlet pipe 310 is provided to cooperate with the main body 10 and the connecting pipe portion 20 to form a Venturi structure, and the second adapter 70 is provided to further improve the applicability of the distributor assembly 1000, so that the inlet pipe 310 and the flow pipe have good connection effect, guarantee the stability of the transmission of the refrigerant, and the service life of the distributor assembly 1000.

[0170] It should be noted that in addition to the above connection mode, the inflow pipe can be directly connected with the inlet pipe 310, optionally, the inflow pipe is screwed on the outer peripheral surface of the inlet pipe 310, or the inflow pipe and the inlet pipe 310 are made of the same material, so that the inflow pipe and the inlet pipe 310 can be welded and fixed, or the inflow pipe is inserted into the inside of the inlet pipe 310.

[0171] The second aspect of the utility mode further proposes a heating system 1, which comprises a first heat exchanger 2000, a second heat exchanger 3000 and a distributor assembly 1000, the distributor assembly 1000 is the above-mentioned distributor assembly 1000, and at this time, the branch pipe 200 communicates with the first heat exchanger 2000, and the distributor 100 communicates with the second heat exchanger 3000.

[0172] Compared with the prior art, the heating system 1 proposed in the present application has the technical advantages of the above-mentioned distributor assembly 1000, which will not be described here.

[0173] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0174] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0175] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0176] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" etc. Such terminology means that a particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative examples given are not necessarily to be construed as preferred or advantageous or important embodiments or examples of the application. Such terminology can include common as well as uncommon examples. Such terminology can also include structural, functional, compositional and / or positional equivalents. In addition, where the description of one or more embodiments or examples of the application has not specifically referred to the other alternatives, it is not meant to exclude them from the scope of the application. Furthermore, where specific integers are used, it is meant to encompass both singular and plural unless specifically stated otherwise. In addition, it is contemplated that a combination of some or all features described can be employed.

[0177] Although embodiments of the application have been illustrated and described, it will be clear to those of ordinary skill in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the principles and the spirit of the application. The scope of the application is not to be limited to the specific embodiments described herein but only to the scope of the claims and their equivalents.

Claims

1. A dispenser assembly, wherein, The application relates to a distributor assembly. The distributor has a distribution cavity and an inflow hole and a plurality of outflow holes communicating with the distribution cavity; a plurality of branch pipes are connected with the distributor and are arranged in one-to-one correspondence with the outflow holes. At least one of the distributor and the branch pipe is made of flexible stainless steel.

2. The dispenser assembly of claim 1, wherein, The branch pipes are in one-to-one correspondence with the outflow holes and are connected with the outflow holes in a plug-in mode.

3. The dispenser assembly of claim 1 or 2, wherein, One end of the distribution cavity communicates with the outflow holes and the other end communicates with the inflow hole.

4. The dispenser assembly of claim 3, wherein, The distributor comprises:

5. The dispenser assembly of claim 4, wherein, A main body in which the outflow holes and the distribution cavity are formed, and a plurality of branch pipes are connected to one end of the main body; a connecting pipe part connected to one side of the main body away from the branch pipes, and the inner side of the connecting pipe part defines an inflow hole. The main body is conical, and the cross-sectional size of the outer contour of the main body gradually decreases in the direction from the main body to the connecting pipe part. The outflow holes are arranged on the side of the main body away from the connecting pipe part, and a plurality of the outflow holes are arranged in a circumferential direction of the main body, the distribution cavity is formed in a ring shape in the circumferential direction of the main body, and the distribution cavity extends in a direction inclined to the central axis of the main body in the direction from the main body to the connecting pipe part.

6. The dispenser assembly of claim 5, wherein, The yield strength of the flexible stainless steel is 140-180 MPa; and / or the tensile strength of the flexible stainless steel is 400-600 MPa; and / or the elongation of the flexible stainless steel is 50-80%; and / or the yield strength ratio of the flexible stainless steel is less than 0.4; and / or the hardness of the flexible stainless steel material is 90-120 Hv. The flexible stainless steel is austenitic flexible stainless steel, and the average grain size of the flexible stainless steel is 20-40 mu m.

7. The dispenser assembly of any one of claims 1-6, wherein, The wall thickness of the flexible stainless steel pipe is 1.2-1.5 mm.

8. The dispenser assembly of any one of claims 1-7, wherein, The M of the flexible stainless steel is D30 / 50 -50°C to -80°C.

9. The dispenser assembly of any one of claims 1-8, wherein, Further comprising:

10. The dispenser assembly of any one of claims 1-9, wherein, A main pipe connected to one end of the connecting pipe part, and the main pipe is a copper pipe, a copper alloy pipe or a flexible stainless steel pipe.

11. The dispenser assembly of any one of claims 5-10, wherein, Further comprising: An adapter pipe connecting the main pipe and an external pipe, wherein the main pipe is a copper pipe or a copper alloy pipe, and the adapter pipe is a copper sleeve.

12. The dispenser assembly of claim 11, wherein, The main pipe is plug-connected to the connecting pipe part, wherein the insertion depth of the main pipe is 5-20 mm, and / or the fitting gap between the main pipe and the connecting pipe part is 0.1-0.2 mm. The main pipe is welded to the external pipe.

13. The dispenser assembly of claim 11 or 12, wherein, The side of the main body facing the branch pipes is provided with a weight-reducing groove recessed towards the connecting pipe part.

14. The dispenser assembly of any one of claims 11-13, wherein, The end of the branch pipe facing the distributor is provided with a first flange, and the first flange surrounds the branch pipe and is connected to the distributor.

15. The dispenser assembly of any one of claims 5-14, wherein, The distributor comprises a main body, and the main body comprises:

16. The dispenser assembly of any one of claims 1-15, wherein, A shell defining a distribution cavity communicating with the inflow hole, and the side of the distribution cavity away from the inflow hole is open; 17. The dispenser assembly of claim 16, wherein, A plate body connected with the shell and located on the side of the distribution cavity away from the inflow hole, and a plurality of outflow holes are arranged on the plate body and surround the inflow hole. The distributor assembly further comprises: ​ 18. The dispenser assembly of claim 17, wherein, ​ A flow distribution cone is arranged on the plate body, an axis of the flow distribution cone is in line with an axis of the inflow hole, and the flow distribution cone is used to guide fluid from the inflow hole to the flow distribution hole.

19. The dispenser assembly of claim 18, wherein, The flow distribution cone and the plate body are integrally formed.

20. The dispenser assembly of claim 18 or 19, wherein, The plate body is provided with a relief hole, the flow distribution cone comprises a cone body, an extension section and a second flange connected in sequence, the cone body is arranged inside the distribution cavity, the extension section is adapted to an inner wall of the relief hole, and the second flange is connected to a side of the plate body away from the distribution cavity.

21. The dispenser assembly of any of claims 16-20, wherein, The branch pipes are rigid members, and a plurality of branch pipes are arranged along different preset paths respectively.

22. The dispenser assembly of any of claims 16-21, wherein, The flow distribution hole has a smaller diameter than an inner diameter of the branch pipe.

23. The dispenser assembly of any one of claims 16-22, wherein, The distributor has a connecting pipe portion defining the inflow hole; The distributor assembly further comprises a main pipe sleeved outside the connecting pipe portion.

24. The dispenser assembly of claim 23, wherein, The main pipe further comprises: An inlet pipe sleeved on the connecting pipe portion, and the inlet pipe has an incident cavity with an inner diameter larger than an inner diameter of the inflow hole; A second adapter inserted at an end of the inlet pipe away from the inflow hole.

25. A heating and ventilation system wherein, Comprise: An indoor unit, a heat source unit, and liquid and gas communication pipes communicating the two, The indoor unit has a first heat exchanger comprising a first heat exchanger body, a first gas pipe assembly and a first liquid pipe assembly, the first gas pipe assembly comprises a first gas collecting pipe and a plurality of first branch pipes connected to a pipe wall of the first gas collecting pipe, the first gas collecting pipe communicates with the gas communication pipe, and the first branch pipes are connected to a gas side of heat exchange pipes of the first heat exchanger body; The heat source unit has a compressor and a second heat exchanger comprising a second heat exchanger body, a second gas pipe assembly and a second liquid pipe assembly, the second gas pipe assembly comprises a second gas collecting pipe and a plurality of second branch pipes connected to a pipe wall of the second gas collecting pipe, an axial end port of the second gas collecting pipe communicates with a gas outlet or a return gas port of the compressor, and the second branch pipes are connected to a gas side of heat exchange pipes of the second heat exchanger body; The first liquid pipe assembly is configured as the distributor assembly according to any one of claims 1-24, and the branch pipes are connected to a liquid side of the heat exchange pipes of the first heat exchanger; And / or, The second liquid pipe assembly is configured as the distributor assembly according to any one of claims 1-24, and the branch pipes are connected to a liquid side of the heat exchange pipes of the second heat exchanger.

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