Air conditioning system

Abstract

The utility model provides an air conditioning system which comprises a first header pipe, a second header pipe and a branch pipe unit, and the first end of the first header pipe is connected and communicated with a first communication port of an outdoor unit; the first end of the second header pipe is connected and communicated with a second communication port of the outdoor unit; the number of the branch pipe units is at least one, and each branch pipe unit corresponds to one indoor unit. Each branch pipe unit comprises a first branch pipe and a second branch pipe; the first end of each first branch pipe is connected and communicated with the second end of the first header pipe, and the second end of each first branch pipe is connected and communicated with the third communication port of the corresponding indoor unit; the first end of each second branch pipe is connected and communicated with the second end of the second header pipe, and the second end of each second branch pipe is connected and communicated with the fourth communication port of the corresponding indoor unit; each first branch pipe is provided with an adjusting valve so as to adjust and throttle the medium circulation amount in the first branch pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioning system. Background Art

[0002] Although the traditional multi-split system can be equipped with multiple indoor units to meet the independent temperature control requirements of different rooms, this traditional multi-split system needs to integrate the corresponding control system on the outdoor unit and each indoor unit (involving complex control systems such as high and low pressure side pressure sensors, subcoolers, return oil, etc.), resulting in higher costs for the outdoor unit and each indoor unit.

[0003] Although the free matching form has a simple system design and can be matched with multiple indoor units to meet the independent temperature control requirements of different rooms, this free matching form directly connects a corresponding number of connecting pipe groups to the outdoor unit, that is, the number of indoor units must be directly connected to the corresponding number of indoor and outdoor unit connecting pipe groups. This leads to a complex connecting pipe structure on the outdoor unit and is very inconvenient when installing pipes through walls. Utility Model Content

[0004] The main purpose of the utility model is to provide an air-conditioning system, so as to simplify the structure of the air-conditioning system and reduce the cost while realizing the independent temperature control demand for multiple indoor units.

[0005] In order to achieve the above-mentioned object, the utility model provides an air-conditioning system, which includes an outdoor unit and an indoor unit, wherein the outdoor unit has a first connecting port and a second connecting port, one of the first connecting port and the second connecting port is a medium inlet of the outdoor unit, and the other is a medium outlet of the outdoor unit; the indoor unit has a third connecting port and a fourth connecting port, one of the third connecting port and the fourth connecting port is a medium inlet of the indoor unit, and the other is a medium outlet of the indoor unit; there is at least one indoor unit; the air-conditioning system also includes: a first main pipe, a first end of the first main pipe is connected and communicated with the first connecting port of the outdoor unit; a second main pipe, a first end of the second main pipe is connected to the outdoor unit The second connecting port of each indoor unit is connected and communicated with each other; a branch pipe unit, there is at least one branch pipe unit, and each branch pipe unit corresponds to an indoor unit; each branch pipe unit includes a first branch pipe and a second branch pipe; wherein the first end of each first branch pipe is connected and communicated with the second end of the first main pipe, and the second end of each first branch pipe is connected and communicated with the third connecting port of the corresponding indoor unit; the first end of each second branch pipe is connected and communicated with the second end of the second main pipe, and the second end of each second branch pipe is connected and communicated with the fourth connecting port of the corresponding indoor unit; each first branch pipe is provided with a regulating valve to regulate and throttle the flow rate of the medium in the first branch pipe.

[0006] Furthermore, the regulating valve is an electronic regulating valve; a first temperature detection component is provided on each second branch pipe to detect the temperature of the medium in the corresponding second branch pipe; the air-conditioning system also includes a controller, and each electronic regulating valve and each first temperature detection component are communicatively connected to the controller so that the controller receives the temperature information detected by each first temperature detection component, and controls the opening of the corresponding electronic regulating valve according to the temperature information detected by each first temperature detection component.

[0007] Furthermore, the indoor unit includes an evaporator, and a second temperature detection component is provided on the medium circulation pipe of the evaporator to detect the medium temperature in the medium circulation pipe of the evaporator; the second temperature detection component is communicatively connected to the controller so that the controller receives temperature information detected by the second temperature detection component of each indoor unit, and controls the opening of the corresponding electronic regulating valve according to the difference between the temperature information detected by each second temperature detection component and the temperature information detected by the corresponding first temperature detection component.

[0008] Furthermore, the regulating valve is an electronic expansion valve.

[0009] Furthermore, a first control valve for controlling the on-off of the first main pipe is arranged on the first main pipe.

[0010] Furthermore, a second control valve for controlling the on-off of the second main pipe is arranged on the second main pipe.

[0011] Furthermore, a third control valve for controlling the on-off of the first branch pipe is arranged on the first branch pipe.

[0012] Furthermore, a fourth control valve for controlling the on-off of the second branch pipe is arranged on the second branch pipe.

[0013] Furthermore, the first temperature detection component is a temperature sensing package.

[0014] Furthermore, the second temperature detection component is a temperature sensing package.

[0015] By applying the technical solution of the utility model, an air-conditioning system includes an outdoor unit and an indoor unit, the outdoor unit has a first connecting port and a second connecting port, one of the first connecting port and the second connecting port is a medium inlet of the outdoor unit, and the other is a medium outlet of the outdoor unit; the indoor unit has a third connecting port and a fourth connecting port, one of the third connecting port and the fourth connecting port is a medium inlet of the indoor unit, and the other is a medium outlet of the indoor unit.

[0016] There is at least one indoor unit, that is, the outdoor unit is matched with one or more indoor units; the air-conditioning system also includes a first main pipe, a second main pipe and a branch pipe unit; the first end of the first main pipe is connected and connected to the first connecting port of the outdoor unit; the first end of the second main pipe is connected and connected to the second connecting port of the outdoor unit; there is at least one branch pipe unit, and each branch pipe unit corresponds to an indoor unit; each branch pipe unit includes a first branch pipe and a second branch pipe; the first end of each first branch pipe is connected and connected to the second end of the first main pipe, and the second end of each first branch pipe is connected and connected to the third connecting port of the corresponding indoor unit; the first end of each second branch pipe is connected and connected to the second end of the second main pipe, and the second end of each second branch pipe is connected and connected to the fourth connecting port of the corresponding indoor unit.

[0017] Each first branch pipe is provided with a regulating valve to regulate and throttle the flow rate of the medium in the first branch pipe.

[0018] The air conditioning system of the present application solves the problem that traditional unit machines cannot be matched with multiple indoor units, and also solves the problem that free-matching units require multiple sets of connecting pipe groups to be connected through the wall, which affects the engineering installation. The cost and control are cheaper and simpler than traditional multi-split units. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of an air conditioning system (including two indoor units) according to the utility model is shown;

[0021] Figure 2 A schematic structural diagram of an air conditioning system (including three indoor units) according to the utility model is shown;

[0022] Figure 3 A schematic structural diagram of an air conditioning system (including four indoor units) according to the utility model is shown;

[0023] Figure 4 The schematic diagram of the structure of the outdoor unit and the indoor unit of the air-conditioning system according to the utility model is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. Outdoor unit; 11. First connecting port; 12. Second connecting port; 13. Condenser; 131. Fifth temperature detection member; 14. Compressor; 151. First expansion valve; 152. Second expansion valve; 16. Four-way valve; 17. External fan; 181. Small valve; 182. Large valve; 19. Refrigerant heat dissipation electrical box;

[0026] 20. Indoor unit; 21. Evaporator; 211. Second temperature detection element; 22. Indoor fan; 23. Third connecting port; 24. Fourth connecting port;

[0027] 31. First main pipe; 311. First control valve; 32. Second main pipe; 321. Second control valve;

[0028] 41, first branch pipe; 411, regulating valve; 412, third control valve; 42, second branch pipe; 421, first temperature detection element; 422, fourth control valve;

[0029] 50. Controller; 61. Third temperature detection element; 62. Fourth temperature detection element. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] The utility model provides an air conditioning system, please refer to Figures 1 to 4 The air conditioning system includes an outdoor unit 10 and an indoor unit 20. The outdoor unit 10 has a first connecting port 11 and a second connecting port 12, one of the first connecting port 11 and the second connecting port 12 is a medium inlet of the outdoor unit 10, and the other is a medium outlet of the outdoor unit 10; the indoor unit 20 has a third connecting port 23 and a fourth connecting port 24, one of the third connecting port 23 and the fourth connecting port 24 is a medium inlet of the indoor unit 20, and the other is a medium outlet of the indoor unit 20.

[0034] There is at least one indoor unit 20, that is, the outdoor unit 10 is equipped with one or more indoor units 20; the air-conditioning system also includes a first main pipe 31, a second main pipe 32 and a branch pipe unit; the first end of the first main pipe 31 is connected and communicated with the first connecting port 11 of the outdoor unit 10; the first end of the second main pipe 32 is connected and communicated with the second connecting port 12 of the outdoor unit 10; there is at least one branch pipe unit, each branch pipe unit corresponds to an indoor unit 20, that is, all branch pipe units are arranged in a one-to-one correspondence with all indoor units 20; each branch pipe unit includes a first branch pipe 41 and a second branch pipe 42; the first end of each first branch pipe 41 is connected and communicated with the second end of the first main pipe 31, and the second end of each first branch pipe 41 is connected and communicated with the third connecting port 23 of the corresponding indoor unit 20; the first end of each second branch pipe 42 is connected and communicated with the second end of the second main pipe 32, and the second end of each second branch pipe 42 is connected and communicated with the fourth connecting port 24 of the corresponding indoor unit 20.

[0035] A regulating valve 411 is provided on each first branch pipe 41 to regulate and throttle the flow rate of the medium in the first branch pipe 41 , that is, the regulating valve 411 is a throttle valve.

[0036] The air-conditioning system of the present application can realize one outdoor unit 10 with one or more indoor units 20, and each indoor unit 20 corresponds to a room, so as to realize the independent temperature control requirements of multiple rooms; at the same time, the structure of the air-conditioning system of the present application is simplified, which solves the problem that the free-matching unit requires multiple sets of connecting pipe groups to be connected through the wall, which affects the engineering installation; and compared with the traditional multi-split unit, the cost is reduced, the control is simplified, and the control cost is reduced.

[0037] In this embodiment, the regulating valve 411 is an electronic regulating valve; each second branch pipe 42 is provided with a first temperature detecting member 421 so as to detect the temperature of the medium in the corresponding second branch pipe 42 through each first temperature detecting member 421 .

[0038] Optionally, the first temperature detection member 421 is a temperature sensing package.

[0039] Optionally, the regulating valve 411 is an electronic expansion valve.

[0040] In this embodiment, the air-conditioning system also includes a controller 50, and each electronic regulating valve and each first temperature detection component 421 are communicatively connected to the controller 50, so that the controller 50 receives the temperature information detected by each first temperature detection component 421, and the controller 50 controls the opening of the corresponding electronic regulating valve according to the temperature information detected by each first temperature detection component 421.

[0041] In this embodiment, the medium in the first main pipe 31 and each first branch pipe 41 is in liquid state or in gas-liquid two-phase saturated state, that is, the first main pipe 31 and each first branch pipe 41 are liquid pipes; the medium in the second main pipe 32 and each second branch pipe 42 is in gaseous state or in gas-liquid two-phase saturated state, that is, the second main pipe 32 and each second branch pipe 42 are gas pipes.

[0042] Optionally, the first main pipe 31 and each first branch pipe 41 are both liquid inlet pipes, and the second main pipe 32 and each second branch pipe 42 are both air outlet pipes.

[0043] In this embodiment, for each indoor unit 20: the indoor unit 20 includes an evaporator 21, and a second temperature detection component 211 is provided on the medium circulation pipe of the evaporator 21 to detect the medium temperature in the medium circulation pipe of the evaporator 21 through the second temperature detection component 211; each second temperature detection component 211 is communicatively connected with the controller 50, so that the controller 50 receives the temperature information detected by the second temperature detection component 211 of the evaporator 21 of each indoor unit 20, and the controller 50 obtains the difference between the temperature information detected by each second temperature detection component 211 and the temperature information detected by the corresponding first temperature detection component 421 according to the temperature information detected by each second temperature detection component 211 and the temperature information detected by the corresponding first temperature detection component 421; and then the controller 50 controls the opening of the corresponding electronic regulating valve according to the difference between the temperature information detected by each second temperature detection component 211 and the temperature information detected by the corresponding first temperature detection component 421.

[0044] Optionally, the second temperature detection member 211 is a temperature sensing package.

[0045] In this embodiment, for each indoor unit 20 , the indoor unit 20 further includes an indoor fan 22 .

[0046] In this embodiment, the air conditioning system further includes a third temperature detection component 61, and the third temperature detection component 61 is used to detect the indoor ambient temperature. Optionally, the third temperature detection component 61 is a temperature sensing package.

[0047] In this embodiment, the air conditioning system further includes a fourth temperature detection component 62, which is used to detect the outdoor ambient temperature. Optionally, the fourth temperature detection component 62 is a temperature sensing package.

[0048] In this embodiment, the outdoor unit 10 includes a condenser 13, a compressor 14 and a throttling assembly, and the throttling assembly includes a first expansion valve 151 and a second expansion valve 152; the evaporator 21 of the indoor unit 20, the compressor 14 of the outdoor unit 10, the condenser 13 of the outdoor unit 10, the first expansion valve 151 and the second expansion valve 152 are connected in sequence to form a circulation loop.

[0049] Optionally, both the first expansion valve 151 and the second expansion valve 152 are electronic expansion valves.

[0050] Specifically, the outdoor unit 10 also includes a four-way valve 16, and the four valve ports of the four-way valve 16 are respectively a first valve port C, a second valve port D, a third valve port E and a fourth valve port S; in the cooling mode, the third valve port E is connected to the fourth valve port S, and the first valve port C and the second valve port D are connected; in the heating mode, the first valve port C is connected to the fourth valve port S, and the second valve port D is connected to the third valve port E; the fourth valve port S is connected and communicated with the medium inlet of the compressor 14, the second valve port D is connected and communicated with the medium outlet of the compressor 14, the first valve port C is connected and communicated with the medium outlet of the condenser 13, and the third valve port E is connected and communicated with the evaporator 21 of the indoor unit 20.

[0051] Specifically, the outdoor unit 10 further includes an outdoor fan 17 .

[0052] Specifically, the outdoor unit 10 further includes a fifth temperature detection member 131 disposed on the medium flow pipe of the condenser 13, so as to detect the medium temperature in the medium flow pipe of the condenser 13 through the fifth temperature detection member 131; the fifth temperature detection member 131 is a defrosting temperature detection member. Optionally, the fifth temperature detection member 131 is a temperature sensing package, i.e., a defrosting temperature sensing package.

[0053] Specifically, a small valve 181 is provided on the connecting pipeline between the evaporator 21 of the indoor unit 20 and the second expansion valve 152 , and a large valve 182 is provided on the connecting pipeline between the evaporator 21 of the indoor unit 20 and the third valve port E of the four-way valve 16 .

[0054] Specifically, the pipe opening of the pipe section of the connecting pipe between the evaporator 21 of the indoor unit 20 and the second expansion valve 152 located on the outdoor side forms the first connecting port 11 of the outdoor unit 10, and the pipe opening of the pipe section of the connecting pipe between the evaporator 21 of the indoor unit 20 and the third valve port E of the four-way valve 16 located on the outdoor side forms the second connecting port 12 of the outdoor unit 10; the pipe opening of the pipe section of the connecting pipe between the evaporator 21 of the indoor unit 20 and the second expansion valve 152 located on the indoor side forms the third connecting port 23 of the indoor unit 20, and the pipe opening of the pipe section of the connecting pipe between the evaporator 21 of the indoor unit 20 and the third valve port E of the four-way valve 16 located on the indoor side forms the fourth connecting port 24 of the indoor unit 20.

[0055] Specifically, the outdoor unit 10 further includes a refrigerant heat dissipation electrical box 19 located on the connecting pipeline between the first expansion valve 151 and the second expansion valve 152, so that the electrical box (mainly a driving module of the electrical box) can realize active heat dissipation of the refrigerant.

[0056] Specifically, the first main pipe 31 is provided with a first control valve 311 for controlling its on-off, and the second main pipe 32 is provided with a second control valve 321 for controlling its on-off; the first branch pipe 41 is provided with a third control valve 412 for controlling its on-off, and the second branch pipe 42 is provided with a fourth control valve 422 for controlling its on-off.

[0057] Optionally, the first control valve 311 , the second control valve 321 , the third control valve 412 and the fourth control valve 422 are all stop valves.

[0058] Optionally, the outdoor unit 10 is a unit outdoor unit.

[0059] In this embodiment, an air conditioning control method is also provided, which is applicable to the above-mentioned air conditioning system.

[0060] When the air-conditioning system operates in heating mode, the air-conditioning control method includes: when any one of all the indoor units 20 of the air-conditioning system has a heating demand, controlling the corresponding regulating valve 411 to open to the maximum opening; when any one of all the indoor units 20 of the air-conditioning system does not have a heating demand, controlling the corresponding regulating valve 411 to close.

[0061] Specifically, when the air conditioning system operates in a heating mode, the air conditioning air conditioner is throttled by the throttling components (the first expansion valve 151 and the second expansion valve 152 ) of the corresponding outdoor unit 10 .

[0062] Specifically, when any one of the indoor units 20 of the air-conditioning system has a heating demand, the corresponding regulating valve 411 (which is an electronic expansion valve) is controlled to be fully opened to run at the maximum number of steps; when any one of the indoor units 20 of the air-conditioning system does not have a heating demand, the corresponding regulating valve 411 (which is an electronic expansion valve) is controlled to be closed, that is, closed to the minimum number of steps.

[0063] When the air conditioning system operates in a cooling mode, the air conditioning control method includes: when any one of all the indoor units 20 of the air conditioning system has a cooling demand, obtaining the medium temperature T1 in the corresponding second branch pipe 42, and obtaining the medium temperature T2 in the medium flow pipe of the evaporator 21 of the corresponding indoor unit 20, so as to calculate the evaporator superheat △T=T1-T2; according to the difference between the initially calculated superheat △T and the preset target value T0, adjusting the opening of the corresponding regulating valve 411, so that the superheat calculated after adjustment is close to the target value, and then the superheat calculated after adjustment △T=T0±t; t is the allowable error value. When any one of all the indoor units 20 of the air conditioning system does not have a cooling demand, the corresponding regulating valve 411 is controlled to be closed.

[0064] Specifically, when the air-conditioning system operates in cooling mode, the throttling component (the first expansion valve 151 and the second expansion valve 152) of the outdoor unit 10 is fully opened to the maximum number of steps, that is, the throttling component of the outdoor unit 10 is fully opened without throttling.

[0065] Optionally, the target value T0 ranges from 0 to 10°C; for example, the target value T0 is 1°C.

[0066] Specifically, when any one of all the indoor units 20 of the air-conditioning system has a cooling demand, the number of steps of the corresponding regulating valve 411 (which is an electronic expansion valve) is adjusted according to the difference between the superheat ΔT and the preset target value T0. When any one of all the indoor units 20 of the air-conditioning system does not have a cooling demand, the corresponding regulating valve 411 (which is an electronic expansion valve) is controlled to be closed, that is, closed to the minimum number of steps.

[0067] like Figure 1 As shown, taking two indoor units 20 as an example, the two indoor units 20 are indoor unit a and indoor unit b respectively.

[0068] When the air conditioning system is running in the heating mode: when both indoor unit a and indoor unit b have heating demand, the electronic expansion valve a (regulating valve 411) and the electronic expansion valve b (regulating valve 411) are fully opened to the maximum number of steps, and the air conditioning shunt is throttled by the throttling component (first expansion valve 151 and second expansion valve 152) of the outdoor unit 10. When indoor unit a does not have heating demand, and only indoor unit b has heating demand, indoor unit a is turned off, and the electronic expansion valve a corresponding to indoor unit a is turned off (the electronic expansion valve a is closed to the minimum number of steps); and the electronic expansion valve b corresponding to indoor unit b is fully opened to the maximum number of steps, and the air conditioning shunt is throttled by the throttling component of the outdoor unit 10. When the indoor unit b does not have a heating demand, but only the indoor unit a has a heating demand, the indoor unit b is shut down, and the electronic expansion valve b corresponding to the indoor unit b is turned off (the electronic expansion valve b is closed to the minimum number of steps); and the electronic expansion valve a corresponding to the indoor unit a is fully opened to the maximum number of steps, and the air conditioner throttles with the throttling component of the outdoor unit 10 for throttling.

[0069] Optionally, the outdoor unit 10 is a 14kW unit outdoor unit; and the two indoor units 20 are both 7kW indoor units.

[0070] Optionally, the step adjustment range of the electronic expansion valve a and the electronic expansion valve b is 0 to 480 steps; when the step number is 0, the flow area of ​​the electronic expansion valve is 0, and when the step number is 480, the flow area of ​​the electronic expansion valve is the largest, that is, the flow volume is the largest.

[0071] When the air conditioning system is operating in cooling mode: when both indoor unit a and indoor unit b have cooling demand, the throttling component of the outdoor unit 10 is fully opened to the maximum number of steps, and the air conditioning air flow is throttled by the regulating valve 411 (electronic expansion valve) corresponding to the corresponding indoor unit 20 according to the superheat, and the opening of the electronic expansion valve a is controlled and adjusted by the superheat △T corresponding to the indoor unit a, and the opening of the electronic expansion valve b is controlled and adjusted by the superheat △T corresponding to the indoor unit b. When the indoor unit a does not have cooling demand, and only the indoor unit b has cooling demand, the throttling component of the outdoor unit 10 is fully opened to the maximum number of steps, and the air conditioning air flow is throttled by the regulating valve 411 (electronic expansion valve) corresponding to the corresponding indoor unit 20 that is turned on for cooling according to the superheat, the indoor unit a is turned off, and the electronic expansion valve a corresponding to the indoor unit a is turned off (the electronic expansion valve a is turned off to the minimum number of steps), and the opening of the electronic expansion valve b corresponding to the turned-on indoor unit b is controlled and adjusted by the superheat △T corresponding to the indoor unit b. When the indoor unit b does not have a cooling demand, but only the indoor unit a has a cooling demand, the throttling component of the outdoor unit 10 is fully opened to the maximum number of steps, and the air conditioning throttling is throttled according to the superheat by the regulating valve 411 (electronic expansion valve) corresponding to the indoor unit 20 that is turned on for cooling. The indoor unit b is turned off, and the electronic expansion valve b corresponding to the indoor unit b is turned off (the electronic expansion valve b is closed to the minimum number of steps), and the opening degree of the electronic expansion valve a corresponding to the turned-on indoor unit a is controlled and adjusted by the superheat △T corresponding to the indoor unit a.

[0072] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0073] In the air-conditioning system provided by the utility model, the air-conditioning system includes an outdoor unit 10 and an indoor unit 20, the outdoor unit 10 has a first connecting port 11 and a second connecting port 12, one of the first connecting port 11 and the second connecting port 12 is a medium inlet of the outdoor unit 10, and the other is a medium outlet of the outdoor unit 10; the indoor unit 20 has a third connecting port 23 and a fourth connecting port 24, one of the third connecting port 23 and the fourth connecting port 24 is a medium inlet of the indoor unit 20, and the other is a medium outlet of the indoor unit 20.

[0074] There is at least one indoor unit 20, that is, the outdoor unit 10 is matched with one or more indoor units 20; the air-conditioning system also includes a first main pipe 31, a second main pipe 32 and a branch pipe unit; the first end of the first main pipe 31 is connected and communicated with the first connecting port 11 of the outdoor unit 10; the first end of the second main pipe 32 is connected and communicated with the second connecting port 12 of the outdoor unit 10; there is at least one branch pipe unit, and each branch pipe unit corresponds to an indoor unit 20; each branch pipe unit includes a first branch pipe 41 and a second branch pipe 42; the first end of each first branch pipe 41 is connected and communicated with the second end of the first main pipe 31, and the second end of each first branch pipe 41 is connected and communicated with the third connecting port 23 of the corresponding indoor unit 20; the first end of each second branch pipe 42 is connected and communicated with the second end of the second main pipe 32, and the second end of each second branch pipe 42 is connected and communicated with the fourth connecting port 24 of the corresponding indoor unit 20.

[0075] Each first branch pipe 41 is provided with a regulating valve 411 to regulate and throttle the flow rate of the medium in the first branch pipe 41 .

[0076] The air conditioning system of the present application solves the problem that traditional unit machines cannot be matched with multiple indoor units, and also solves the problem that free-matching units require multiple sets of connecting pipe groups to be connected through the wall, which affects the engineering installation. The cost and control are cheaper and simpler than traditional multi-split units.

[0077] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0078] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0079] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An air conditioning system, comprising an outdoor unit (10) and an indoor unit (20), wherein the outdoor unit (10) has a first communication port (11) and a second communication port (12), wherein one of the first communication port (11) and the second communication port (12) is a medium inlet of the outdoor unit (10), and the other is a medium outlet of the outdoor unit (10); the indoor unit (20) has a third communication port (23) and a fourth communication port (24), wherein one of the third communication port (23) and the fourth communication port (24) is a medium inlet of the indoor unit (20), and the other is a medium outlet of the indoor unit (20); characterized in that: The number of the indoor unit (20) is at least one; the air conditioning system further comprises: A first main pipe (31), wherein a first end of the first main pipe (31) is connected to and communicates with a first communication port (11) of the outdoor unit (10); a second main pipe (32), wherein a first end of the second main pipe (32) is connected to and communicates with a second communication port (12) of the outdoor unit (10); A branch pipe unit, there is at least one branch pipe unit, each branch pipe unit corresponds to one indoor unit (20); each branch pipe unit comprises a first branch pipe (41) and a second branch pipe (42); The first end of each first branch pipe (41) is connected to and communicated with the second end of the first main pipe (31), and the second end of each first branch pipe (41) is connected to and communicated with the third connecting port (23) of the corresponding indoor unit (20); the first end of each second branch pipe (42) is connected to and communicated with the second end of the second main pipe (32), and the second end of each second branch pipe (42) is connected to and communicated with the fourth connecting port (24) of the corresponding indoor unit (20); and each first branch pipe (41) is provided with a regulating valve (411) to regulate and throttle the flow rate of the medium in the first branch pipe (41).

2. The air conditioning system according to claim 1, characterized in that: The regulating valve (411) is an electronic regulating valve; each of the second branch pipes (42) is provided with a first temperature detection component (421) to detect the temperature of the medium in the corresponding second branch pipe (42); The air conditioning system further comprises a controller (50), and each of the electronic regulating valves and each of the first temperature detecting components (421) are communicatively connected to the controller (50), so that the controller (50) receives temperature information detected by each of the first temperature detecting components (421), and controls the opening of the corresponding electronic regulating valve according to the temperature information detected by each of the first temperature detecting components (421).

3. The air conditioning system according to claim 2, characterized in that: The indoor unit (20) comprises an evaporator (21); a second temperature detection component (211) is provided on the medium flow pipe of the evaporator (21) to detect the temperature of the medium in the medium flow pipe of the evaporator (21); the second temperature detection component (211) is communicatively connected with the controller (50) so that the controller (50) receives temperature information detected by the second temperature detection component (211) of each indoor unit (20), and controls the opening degree of the corresponding electronic regulating valve according to the difference between the temperature information detected by each second temperature detection component (211) and the temperature information detected by the corresponding first temperature detection component (421).

4. The air conditioning system according to any one of claims 1 to 3, characterized in that: The regulating valve (411) is an electronic expansion valve.

5. The air conditioning system according to any one of claims 1 to 3, characterized in that: The first main pipe (31) is provided with a first control valve (311) for controlling the on-off of the first main pipe (31).

6. The air conditioning system according to any one of claims 1 to 3, characterized in that: The second main pipe (32) is provided with a second control valve (321) for controlling the on-off of the second main pipe (32).

7. The air conditioning system according to any one of claims 1 to 3, characterized in that: The first branch pipe (41) is provided with a third control valve (412) for controlling the opening and closing of the first branch pipe (41).

8. The air conditioning system according to any one of claims 1 to 3, characterized in that: The second branch pipe (42) is provided with a fourth control valve (422) for controlling the on-off of the second branch pipe (42).

9. The air conditioning system according to claim 2, characterized in that: The first temperature detection component (421) is a temperature sensing package.

10. The air conditioning system according to claim 3, characterized in that: The second temperature detection component (211) is a temperature sensing package.

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