Five-constant air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, and discloses a five-constant air conditioning system. The fresh air machine is provided with a diverter valve box, and a plurality of diverter branches are arranged in the diverter valve box; one end of the liquid supply pipeline communicates with the outdoor unit, and the other end communicates with the fresh air machine; one end of the liquid return pipeline communicates with the outdoor unit, and the other end communicates with the fresh air machine; the number of the indoor units is smaller than or equal to the number of the flow dividing branches, and the flow dividing pipelines are detachably connected with the indoor units, so that refrigerants of the outdoor units flow into the corresponding indoor units after being adjusted through the flow dividing valve boxes and flow back to the outdoor units from the liquid return pipelines. The outdoor unit, the fresh air ventilator and the indoor units can be connected to form a comprehensive system, the fresh air ventilator and the multiple indoor units share the outdoor unit, refrigerant circulation of the outdoor unit is utilized, a concentrated cold and heat source is provided for the whole five-constant air conditioning system, and the cold and heat source does not need to be independently arranged in the fresh air ventilator.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, for example, to a five-constant air conditioning system. Background Art

[0002] Currently, the five constants include constant temperature, constant oxygen, constant humidity, constant cleanliness, and constant quietness. Most of the existing air conditioning systems for achieving the five constants directly combine traditional air conditioning units with fresh air units. The traditional air conditioning unit includes an outdoor main unit and a DC variable frequency air conditioning indoor unit. The existing total heat recovery fresh air unit includes an outdoor main unit and a total heat recovery fresh air machine. During actual use, the five constants are achieved through the mutual cooperation of the air conditioning unit and the total heat recovery fresh air unit.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related technologies:

[0004] The existing air conditioning units and fresh air units of the five-constant system operate independently. Not only are the air conditioning unit and the fresh air unit not related to each other during operation, which affects the five-constant effect, but also the directly combined form requires multiple outdoor units and multiple lines, etc., making the system structure relatively complex and costly.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0006] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0007] The embodiments of the present disclosure provide a five-constant air conditioning system to solve the problems that the air conditioning unit and the fresh air unit of the existing five-constant air conditioning system are independent of each other, have a large volume, and are complex to install.

[0008] The embodiments of the first aspect of the present application provide a five-constant air conditioning system, which includes: an outdoor unit;

[0009] A fresh air machine, provided with a shunt valve box, and a plurality of shunt branches are arranged in the shunt valve box;

[0010] A liquid supply pipeline, one end of which is communicated with the outdoor unit, and the other end is communicated with the fresh air machine;

[0011] A liquid return pipeline, one end of which is communicated with the outdoor unit, and the other end is communicated with the fresh air machine;

[0012] Indoor units, the number of indoor units is multiple, and the number of indoor units is less than or equal to the number of shunt branches. The shunt pipeline is detachably connected to the indoor unit, so that the refrigerant of the outdoor unit flows into the corresponding indoor unit after being adjusted by the shunt valve box and flows back to the outdoor unit through the liquid return pipeline.

[0013] In some alternative embodiments, the shunt valve box includes:

[0014] A valve body that defines an accommodation cavity;

[0015] The shunt branch includes a shunt inlet pipeline and a shunt outlet pipeline, which are arranged in the accommodation cavity. The first ends of the shunt inlet pipelines are all communicated with the supply pipeline, the second ends of the shunt inlet pipelines are exposed outside the valve body and can be detachably connected to the outdoor unit; the first end of the shunt outlet pipeline is communicated with the liquid return pipeline, and the second end of the shunt outlet pipeline is exposed outside the valve body and can be detachably connected to the outdoor unit;

[0016] Multiple control valves, the number of control valves is the same as the number of shunt branches, and the control valves are arranged in one-to-one correspondence with the shunt branches.

[0017] In some alternative embodiments, the five-constant air-conditioning system further includes: a stop valve, which is arranged outside the valve body, and the stop valve is located at the connection between the supply pipeline and the shunt valve box and at the connection between the liquid return pipeline and the shunt valve box, so that both the supply pipeline and the liquid return pipeline are connected to the shunt branch through the stop valve.

[0018] In some alternative embodiments, the fresh air unit includes:

[0019] A machine body provided with an indoor return air inlet, an outdoor fresh air inlet and an indoor air outlet;

[0020] A first evaporator, which is arranged in the machine body and is communicated with both the supply pipeline and the liquid return pipeline;

[0021] A blower, which is arranged in the machine body and is used to drive the air in the machine body to flow out from the indoor air outlet.

[0022] In some alternative embodiments, the fresh air unit further includes:

[0023] A second evaporator, which is arranged in the machine body and is located on the side of the first evaporator facing the indoor air outlet, and is used to process the air flowing through the first evaporator.

[0024] In some alternative embodiments, the five-constant air-conditioning system further includes:

[0025] A supply branch, one end of which is communicated with the outdoor unit and the other end is communicated with the second evaporator;

[0026] A liquid return branch, one end of which is communicated with the second evaporator and the other end is communicated with the liquid return pipeline.

[0027] In some alternative embodiments, the body is provided with a plurality of indoor air outlets, the number of the indoor air outlets being greater than or equal to the number of indoor spaces suitable for installation. The fresh air unit further includes air outlet ducts, the number of the air outlet ducts being multiple, the number of the air outlet ducts being the same as the number of the indoor air outlets and being arranged in one-to-one correspondence. One end of each air outlet duct communicates with the indoor air outlet, and the other end of each air outlet duct extends into the indoor space.

[0028] In some alternative embodiments, the fresh air unit further includes:

[0029] A first air valve, which is arranged in the body and located at the outdoor fresh air inlet, and is used to open or close the outdoor fresh air inlet.

[0030] In some alternative embodiments, the fresh air unit further includes:

[0031] A second air valve, which is arranged in the body and located at the indoor return air inlet, and is used to open or close the indoor return air inlet.

[0032] In some alternative embodiments, the fresh air unit further includes a filtering module, which is arranged in the body and covers the indoor return air inlet and the outdoor fresh air inlet, and is used to filter the air flowing into the body from the indoor return air inlet and the outdoor fresh air inlet.

[0033] The five-constant air-conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0034] By arranging a flow dividing valve box in the fresh air unit and arranging flow dividing branches in the flow dividing valve box, part of the refrigerant flowing into the fresh air unit can flow into the corresponding indoor unit under the regulation of the flow dividing valve box. The flow dividing valve box can accurately control the refrigerant flow of each indoor unit, so as to achieve independent and accurate control of the temperature of each room. By detachably connecting the flow dividing pipeline to the indoor unit, firstly, according to the actual needs of users, the number of indoor units to be installed can be flexibly controlled, improving the flexibility of installation. Secondly, there is no need to connect the indoor unit to the outdoor unit, reducing the number and length of the pipelines connecting the indoor unit and the outdoor unit, and reducing the complexity of the five-constant air-conditioning system. In addition, since the outdoor unit is usually installed outdoors, the installation environment is dangerous and the operation is inconvenient. This embodiment avoids the direct connection between the indoor unit and the outdoor unit, reducing the workload and risk of outdoor installation. By arranging the indoor unit, the indoor unit can adjust the temperature and humidity of the environment space where it is located to ensure the constant temperature and constant humidity of the indoor space. By adopting the five-constant air-conditioning system of the embodiments of the present disclosure, the outdoor unit, the fresh air unit and the indoor unit can be connected to form an integrated system. The fresh air unit shares the outdoor unit with multiple indoor units, and uses the refrigerant cycle of the outdoor unit to provide centralized cold and heat sources for the entire five-constant air-conditioning system, without separately setting cold and heat sources in the fresh air unit.

[0035] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. Description of the Drawings

[0036] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0037] Figure 1 is a schematic structural diagram of a five-constant air conditioning system provided by an embodiment of the present disclosure;

[0038] Figure 2 is a schematic structural diagram of a fresh air unit provided by an embodiment of the present disclosure;

[0039] Figure 3 is a schematic structural diagram of another five-constant air conditioning system provided by an embodiment of the present disclosure;

[0040] Figure 4 is a schematic indoor installation diagram of a five-constant air conditioning system provided by an embodiment of the present disclosure.

[0041] Reference numerals:

[0042] 10: Outdoor unit,

[0043] 20: Fresh air unit, 21: Diverting valve box, 22: Diverting branch, 221: Diverting liquid inlet pipeline, 222: Diverting liquid outlet pipeline, 23: Body, 231: Indoor return air inlet, 232: Outdoor fresh air inlet, 233: Indoor air outlet, 24: First evaporator, 25: Fan, 26: Second evaporator, 27: Filter module, 28: Air distribution box, 281: Air outlet duct, 29: Fresh air pipeline, 30: Return air box, 301: Return air duct, 31: Liquid supply pipeline, 32: Liquid return pipeline, 33: Liquid supply branch, 34: Liquid return branch, 35: Stop valve, 36: Control valve,

[0044] 40: Indoor unit. Detailed implementation manners

[0045] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the drawings. The attached drawings are for reference and illustration only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner.

[0046] In the specification, claims, and above-mentioned accompanying drawings of the embodiments of the present disclosure, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to describe the embodiments of the present disclosure here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0047] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated device, element, or component must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0048] In addition, the terms "arranged", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0049] Unless otherwise specified, the term "plurality" means two or more.

[0050] In the embodiments of the present disclosure, the character " / " indicates that the front and rear objects are in an "or" relationship. For example, A / B means: A or B.

[0051] The term "and / or" is an associative relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B these three relationships.

[0052] It should be noted that, without conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0053] Combined with Figures 1 to 4As shown in the figure, an embodiment of the present disclosure provides a five-constant air conditioning system, which includes: an outdoor unit 10, a fresh air unit 20, a liquid supply pipeline 31, a liquid return pipeline 32, and indoor units 40. The fresh air unit 20 is provided with a flow distribution valve box 21, and a plurality of flow distribution branches 22 are arranged in the flow distribution valve box 21. One end of the liquid supply pipeline 31 is communicated with the outdoor unit 10, and the other end of the liquid supply pipeline 31 is communicated with the fresh air unit 20. One end of the liquid return pipeline 32 is communicated with the outdoor unit 10, and the other end of the liquid return pipeline 32 is communicated with the fresh air unit 20. The number of indoor units 40 is multiple, and the number of indoor units 40 is less than or equal to the number of flow distribution branches 22. The flow distribution pipeline is detachably connected to the indoor unit 40, so that the refrigerant of the outdoor unit 10 flows into the corresponding indoor unit 40 after being adjusted by the flow distribution valve box 21, and flows back to the outdoor unit 10 through the liquid return pipeline 32.

[0054] By adopting the embodiment of the present disclosure, by setting the liquid supply pipeline 31 and the liquid return pipeline 32, and connecting the fresh air unit 20 and the outdoor unit 10 through the liquid supply pipeline 31 and the liquid return pipeline 32, the refrigerant of the outdoor unit 10 can flow into the fresh air unit 20 through the liquid supply pipeline 31, and after heat exchange in the fresh air unit 20, it flows back to the outdoor unit 10 along the liquid return pipeline 32, using the refrigerant of the outdoor unit 10 to provide heat, without separately setting a cold and heat source in the fresh air unit 20, which can reduce the volume of the fresh air unit 20 and facilitate the installation of the fresh air unit 20 in a space-limited occasion, especially in small-sized buildings.

[0055] By setting a flow distribution valve box 21 in the fresh air unit 20 and arranging flow distribution branches 22 in the flow distribution valve box 21, part of the refrigerant flowing into the fresh air unit 20 can flow into the corresponding indoor unit 40 under the adjustment of the flow distribution valve box 21. The flow distribution valve box 21 can accurately control the refrigerant flow rate of each indoor unit 40, so as to realize the independent and accurate control of the temperature of each room. By detachably connecting the flow distribution pipeline to the indoor unit 40, firstly, according to the actual needs of users, the number of indoor units 40 to be installed can be flexibly controlled, improving the flexibility of installation. Secondly, there is no need to connect the indoor unit 40 to the outdoor unit 10, reducing the number and length of the pipelines connecting the indoor unit 40 and the outdoor unit 10, and reducing the complexity of the five-constant air conditioning system. In addition, since the outdoor unit 10 is usually installed outdoors, the installation environment is dangerous and the operation is inconvenient. This embodiment avoids the direct connection between the indoor unit 40 and the outdoor unit 10, reducing the workload and risk of outdoor installation. By setting the indoor unit 40, the indoor unit 40 can adjust the temperature and humidity of the surrounding environment space to ensure the constant temperature and humidity of the indoor space.

[0056] By adopting the five-constant air conditioning system of the embodiment of the present disclosure, the outdoor unit 10, the fresh air unit 20, and the indoor units 40 can be connected to form a comprehensive system. The fresh air unit 20 shares the outdoor unit 10 with multiple indoor units 40, and uses the refrigerant circulation of the outdoor unit 10 to provide a centralized cold and heat source for the entire five-constant air conditioning system, without separately setting a cold and heat source in the fresh air unit 20.

[0057] Optionally, the fresh air machine 20 is suitable for being installed at positions such as a balcony or a living room.

[0058] In this way, by installing the fresh air machine 20 on the balcony or in the living room, the distance between the outdoor unit 10 and the fresh air machine 20 can be shortened, and the length of the pipeline that needs to be connected can be shortened.

[0059] Optionally, the flow dividing valve box 21 includes: a valve body, a flow dividing branch 22 and a control valve 36. The valve body defines an accommodating cavity; the flow dividing branch 22 includes a flow dividing liquid inlet pipeline 221 and a flow dividing liquid outlet pipeline 222. The flow dividing liquid inlet pipeline 221 and the flow dividing liquid outlet pipeline 222 are arranged in the accommodating cavity, and the first ends of the flow dividing liquid inlet pipelines 221 are all communicated with the liquid supply pipeline 31. The second ends of the flow dividing liquid inlet pipelines 221 are exposed out of the valve body and can be detachably connected to the outdoor unit 10; the first ends of the flow dividing liquid outlet pipelines 222 are communicated with the liquid return pipeline 32, and the second ends of the flow dividing liquid outlet pipelines 222 are exposed out of the valve body and can be detachably connected to the outdoor unit 10; a plurality of control valves 36, the number of the control valves 36 is the same as the number of the flow dividing branches 22, and the control valves 36 are arranged in one-to-one correspondence with the flow dividing branches 22.

[0060] By adopting the embodiment of the present disclosure, by arranging the flow dividing liquid inlet pipeline 221 and the flow dividing liquid outlet pipeline 222, part of the refrigerant flowing into the fresh air machine 20 can flow into the indoor unit 40 along the flow dividing liquid inlet pipeline 221, and after heat exchange in the indoor unit 40, it can flow back to the fresh air machine 20 along the flow dividing liquid outlet pipeline 222. By arranging a plurality of control valves 36 and arranging the control valves 36 in one-to-one correspondence with the flow dividing branches 22, the control valve 36 can open or close the corresponding flow dividing branch 22. The independent control of each flow dividing branch 22 by the control valve 36 can accurately adjust the refrigerant flow rate of each indoor unit 40 and improve the accuracy of temperature control.

[0061] Optionally, the control valve 36 is arranged on the flow dividing liquid inlet pipeline 221.

[0062] By arranging the control valve 36 on the flow dividing liquid inlet pipeline 221, the control valve 36 can directly adjust the refrigerant flow rate entering each indoor unit 40, thereby controlling the refrigeration or heating effect of the indoor unit 40. The control valve 36 can be fully opened or closed to realize the on-off control of the liquid supply pipeline 31 of a specific indoor unit 40. In this way, when the indoor unit 40 is disassembled or installed, it can be avoided that the refrigerant flows out from the flow dividing liquid inlet pipeline 221. Secondly, the precise adjustment of the control valve 36 helps to maintain the stable operation of the five-constant air conditioning system and reduce the fluctuation of the five-constant air conditioning system.

[0063] Optionally, the control valve 36 is an electric two-way valve.

[0064] In this way, by adopting the electric two-way valve, which has the advantage of fast response speed, the five-constant air-conditioning system can automatically control the electric two-way valve, reducing manual operation. The electric two-way valve can automatically adjust its opening degree by receiving a control signal, thereby controlling the refrigerant flow rate. Secondly, the electric two-way valve has relatively low noise during the adjustment process and will not affect the quietness of the indoor environment.

[0065] Optionally, the five-constant air-conditioning system further includes a stop valve 35. The stop valve 35 is arranged outside the valve body and is located at the connection between the liquid supply pipeline 31 and the shunt valve box 21, so that the liquid supply pipeline 31 is connected to the shunt branch 22 of the shunt valve box 21 through the stop valve 35.

[0066] By adopting the embodiment of the present disclosure, by setting the stop valve 35, on the one hand, the stop valve 35 can play a role in controlling the on-off of the pipeline. On the other hand, the stop valve 35 is used to connect two sections of pipelines, and the two ends of the pipeline are fixed together by means of threaded connection, flange connection or other connection methods.

[0067] Optionally, the stop valve 35 is arranged outside the valve body, and the stop valve 35 is located at the connection between the liquid return pipeline 32 and the shunt valve box 21, so that the liquid return pipeline 32 is connected to the shunt branch 22 of the shunt valve box 21 through the stop valve 35.

[0068] This facilitates the installation and connection of the liquid return pipeline 32 and the shunt branch 22 of the shunt valve box 21. On the other hand, the on-off of the liquid return pipeline 32 and the shunt branch 22 of the shunt valve box 21 can be controlled by controlling the stop valve 35.

[0069] Optionally, the fresh air unit 20 includes a machine body 23, a first evaporator 24 and a fan 25. The machine body 23 is provided with an indoor air return opening 231, an outdoor fresh air inlet 232 and an indoor air outlet 233; the first evaporator 24 is arranged inside the machine body 23, and the first evaporator 24 is communicated with both the liquid supply pipeline 31 and the liquid return pipeline 32; the fan is arranged inside the machine body 23, and the fan 25 is used to drive the air inside the machine body 23 to flow out from the indoor air outlet 233.

[0070] By adopting the embodiment of the present disclosure, by providing the indoor air return opening 231 in the machine body 23, indoor air can flow along the indoor air return opening 231 into the machine body 23, and the indoor air is processed inside the machine body 23. By providing the outdoor fresh air inlet 232 in the machine body 23, outdoor fresh air can flow into the machine body 23 along the outdoor fresh air inlet 232. By providing the indoor air outlet 233 in the machine body 23, the processed air in the machine body 23 can flow out of the machine body 23 along the indoor air outlet 233.

[0071] By providing the first evaporator 24 and connecting the first evaporator 24 to both the liquid supply line 31 and the liquid return line 32, part of the refrigerant flowing from the outdoor unit 10 into the fresh air unit 20 can flow into the first evaporator 24, so that the first evaporator 24 exchanges heat with the air inside the machine body 23. For example, when the air needs to be temperature - adjusted or dehumidified, the first evaporator 24 can heat or cool the air.

[0072] By providing the fan 25, the fan 25 can provide power for the air flow inside the machine body 23. The fan can drive the indoor air to flow into the machine body 23 from the indoor air return opening 231 or the outdoor fresh air to flow into the machine body 23 from the outdoor fresh air opening 232, and flow out of the machine body 23 from the indoor air outlet 233.

[0073] Optionally, the fresh air unit 20 further includes a humidification module. The humidification module is arranged inside the machine body 23, can be controllably opened and closed, and the water sprayed by the humidification module can drip onto the first evaporator 24.

[0074] In this way, when humidification is required, the humidification module is turned on and the first evaporator 24 is in the heating state, so that the water on the first evaporator 24 can quickly evaporate, quickly increase the humidity of the air, and improve the humidification efficiency.

[0075] Optionally, the fresh air unit 20 further includes a second evaporator 26. The second evaporator 26 is arranged inside the machine body 23, and the second evaporator 26 is located on the side of the first evaporator 24 facing the indoor air outlet 233. The second evaporator 26 is used to process the air flowing through the first evaporator 24.

[0076] Adopting the embodiment of the present disclosure, by providing the second evaporator 26, the second evaporator 26 can further process the air passing through the first evaporator 24. For example, during the humidification process, the air temperature is relatively high. The second evaporator 26 can exchange heat with the air to reduce the air temperature, so as to keep the indoor space at a constant temperature and humidity.

[0077] Optionally, the five - constant air - conditioning system further includes a liquid supply branch 33 and a liquid return branch 34. One end of the liquid supply branch 33 is connected to the outdoor unit 10, and the other end of the liquid supply branch 33 is connected to the second evaporator 26; one end of the liquid return branch 34 is connected to the second evaporator 26, and the other end of the liquid return branch 34 is connected to the liquid return line 32.

[0078] By adopting the embodiment of the present disclosure, by providing a liquid supply branch 33 and a liquid return branch 34, a part of the medium-pressure refrigerant in the outdoor unit 10 can flow into the second evaporator 26, enabling the second evaporator 26 to directly obtain refrigerant from the outdoor unit 10. The second evaporator 26 can perform secondary heat exchange with air, enabling more refined treatment of the air, further purifying and conditioning the air. By separately providing a liquid supply branch 33 for the second evaporator 26 to supply liquid, it can be ensured that the medium-pressure refrigerant in the outdoor unit 10 can directly and independently flow into the second evaporator 26 without being interfered by other evaporators or system components.

[0079] Optionally, the fresh air unit 20 further includes a fresh air pipeline 29. One end of the fresh air pipeline 29 is communicated with the outdoor fresh air inlet 232, and the other end of the fresh air pipeline 29 extends to the outside of the room, so that outdoor ambient air flows into the machine body 23 along the fresh air pipeline 29.

[0080] Optionally, the fresh air unit 20 further includes a filtering module 27. The filtering module 27 is arranged in the machine body 23, and the filtering module 27 covers the indoor air return opening 231 and the outdoor fresh air inlet 232. The filtering module 27 is used to filter the air flowing into the machine body 23 from the indoor air return opening 231 and the outdoor fresh air inlet 232.

[0081] By adopting the embodiment of the present disclosure, by providing the filtering module 27, the filtering module 27 can effectively filter out harmful substances such as dust, pollen, and bacteria in indoor and outdoor air, improving indoor air quality. By arranging the filtering module 27 to cover the indoor air return opening 231 and the outdoor fresh air inlet 232, the filtering module 27 can filter the air flowing in from the indoor air return opening 231 and the outdoor fresh air inlet 232.

[0082] Optionally, the fresh air unit 20 further includes: a first air valve. The first air valve is arranged in the machine body 23 and is located at the outdoor fresh air inlet 232. The first air valve is used to open or close the outdoor fresh air inlet 232.

[0083] By adopting the embodiment of the present disclosure, by providing the first air valve and arranging the first air valve at the outdoor fresh air inlet 232, the first air valve can control the entry of outdoor fresh air into the fresh air unit 20, thereby regulating the exchange of indoor and outdoor air. When fresh air is not required or the quality of fresh air is poor, the air valve can be closed to ensure indoor air quality.

[0084] Optionally, the fresh air unit 20 further includes: a second air valve. The second air valve is arranged in the machine body 23 and is located at the indoor air return opening 231. The second air valve is used to open or close the indoor air return opening 231.

[0085] By adopting the embodiment of the present disclosure, by providing a second air valve and arranging the second air valve at the indoor air return opening 231, the second air valve can control the indoor air return to enter the fresh air unit 20, thereby adjusting the circulation of indoor air. When the circulation of indoor air is not required, the energy consumption required for the fresh air unit 20 to process indoor air can be reduced by closing the air valve.

[0086] Optionally, the first air valve and the second air valve can be integrated with the control system of the five-constant air conditioning system to achieve automated control of indoor air circulation.

[0087] Optionally, the body 23 is provided with a plurality of indoor air outlets 233, and the number of indoor air outlets 233 is greater than or equal to the number of indoor spaces suitable for installation, so that each indoor space has a corresponding indoor air outlet 233; the fresh air unit 20 further includes: air outlet air ducts 281, the number of air outlet air ducts 281 is plural, the number of air outlet air ducts 281 is the same as the number of indoor air outlets 233 and is arranged in one-to-one correspondence, one end of each air outlet air duct 281 communicates with the indoor air outlet 233, and the other end of each air outlet air duct 281 extends into the indoor space.

[0088] By adopting the embodiment of the present disclosure, by providing a plurality of indoor air outlets 233 and setting the number of indoor air outlets 233 to be greater than or equal to the number of indoor spaces suitable for installation, each indoor space can have a corresponding indoor air outlet 233, ensuring that the air of the fresh air unit 20 can be evenly distributed to each indoor space. By providing a plurality of air outlet air ducts 281, the air flowing out of the indoor air outlets 233 can be guided to other indoor spaces where the fresh air unit 20 is not installed, realizing the even distribution of fresh air. Secondly, the number and layout of the air outlet air ducts 281 can be designed and installed according to the specific conditions of the indoor space, avoiding occupying too much indoor space.

[0089] Optionally, the air outlet air duct 281 is a floor supply air duct, and the floor supply air duct is suitable for being installed under the floor of the indoor space.

[0090] In this way, by setting it as a floor supply air duct, the floor supply air duct can be installed under the floor, and the air conditioning duct can be hidden. Compared with the ceiling installation method, it does not need to occupy the indoor top space, can keep the beauty and neatness of the indoor decoration and save indoor space. Secondly, the floor supply air duct can achieve floor supply air, making the indoor temperature distribution more uniform, improving the heating effect, and the floor supply air duct can utilize the principle of natural upward movement of hot air to improve the heat exchange efficiency.

[0091] Optionally, the fresh air unit 20 includes a air distribution box 28, the air distribution box 28 is arranged inside the body 23 and is communicated with a plurality of indoor air outlets 233, and the air distribution box 28 is used to control the air volume of each indoor air outlet 233.

[0092] In this way, by setting the air distribution box 28, the air distribution box 28 can convert the high dynamic pressure air generated by the fan into static pressure air and evenly distribute the air volume to each indoor air outlet 233, ensuring that each area can obtain sufficient fresh air volume. By increasing the static pressure, the air distribution box 28 can make the air supply distance of the fresh air fan 20 farther and the range wider, so as to better cover each indoor space.

[0093] Specifically, when the range hood in the kitchen is working, the air distribution box 28 can control the indoor air outlet 233 located in the kitchen to be opened separately to supply air to the kitchen and avoid the occurrence of negative pressure in the kitchen.

[0094] Optionally, the inner wall of the air distribution box 28 is attached with noise reduction materials.

[0095] In this way, it can effectively absorb and reduce the noise generated by the fan and air flow, and improve the comfort of the indoor environment.

[0096] Optionally, the fresh air fan 20 further includes a return air box 30 and a return air duct 301. The return air box 30 is provided with a plurality of air inlets. One end of the return air duct 301 is communicated with the return air box 30, and the other end of the return air duct 301 is communicated with the indoor return air outlet 231.

[0097] In this way, by separately setting the return air box 30, the position of the return air box 30 in the indoor space can be flexibly installed. The return air box 30 can be arranged at the top of the indoor space. By the way of air supply from the bottom and air return from the top, the air in the indoor space can be replaced more thoroughly. By setting a plurality of air inlets in the return air box 30, the return air area can be increased, and then the return air volume can be increased to ensure the return air efficiency. By setting the return air duct 301, the air in the return air box 30 can flow into the fresh air fan 20 along the return air duct 301.

[0098] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A five-constant air conditioning system, characterized in that, Comprising: Outdoor unit; Fresh air unit, provided with a shunt valve box, and a plurality of shunt branches are provided in the shunt valve box; Liquid supply pipeline, one end of which is communicated with the outdoor unit, and the other end is communicated with the fresh air unit; Liquid return pipeline, one end of which is communicated with the outdoor unit, and the other end is communicated with the fresh air unit; Indoor units, the number of indoor units is multiple, and the number of indoor units is less than or equal to the number of shunt branches. The shunt pipeline is detachably connected to the indoor units, so that the refrigerant of the outdoor unit flows into the corresponding indoor unit after being adjusted by the shunt valve box, and flows back to the outdoor unit through the liquid return pipeline.

2. The five-constant air conditioning system according to claim 1, wherein The shunt valve box includes: Valve body, defining an accommodation cavity; The shunt branch includes a shunt liquid inlet pipeline and a shunt liquid outlet pipeline, which are arranged in the accommodation cavity. The first ends of the shunt liquid inlet pipelines are all communicated with the liquid supply pipeline, and the second ends of the shunt liquid inlet pipelines expose the valve body and can be detachably connected to the outdoor unit; the first ends of the shunt liquid outlet pipelines are communicated with the liquid return pipeline, and the second ends of the shunt liquid outlet pipelines expose the valve body and can be detachably connected to the outdoor unit; A plurality of control valves, the number of control valves is the same as the number of shunt branches, and the control valves are arranged in one-to-one correspondence with the shunt branches.

3. The five-constant air-conditioning system according to claim 2, characterized in that, It further includes: Cut-off valve, arranged outside the valve body, and the cut-off valve is located at the connection between the liquid supply pipeline and the shunt valve box and the connection between the liquid return pipeline and the shunt valve box, so that both the liquid supply pipeline and the liquid return pipeline are connected to the shunt branch through the cut-off valve.

4. The five-constant air conditioning system according to claim 1, wherein the fresh air unit Comprising: Machine body, provided with an indoor air return opening, an outdoor fresh air inlet and an indoor air outlet; First evaporator, arranged in the machine body, and is communicated with both the liquid supply pipeline and the liquid return pipeline; Fan, arranged in the machine body, and is used to drive the air in the machine body to flow out from the indoor air outlet.

5. The five-constant air conditioning system according to claim 4, wherein The fresh air unit further includes: Second evaporator, arranged in the machine body and located on the side of the first evaporator facing the indoor air outlet, and is used to process the air flowing through the first evaporator.

6. The five-constant air conditioning system according to claim 5, wherein, It further includes: Liquid supply branch, one end of which is communicated with the outdoor unit, and the other end is communicated with the second evaporator; Liquid return branch, one end of which is communicated with the second evaporator, and the other end is communicated with the liquid return pipeline.

7. The five-constant air conditioning system according to claim 4, characterized in that, The machine body is provided with a plurality of indoor air outlets, the number of indoor air outlets is greater than or equal to the number of indoor spaces suitable for installation. The fresh air unit further includes air outlet ducts, the number of air outlet ducts is multiple, the number of air outlet ducts is the same as the number of indoor air outlets and is arranged in one-to-one correspondence. One end of each air outlet duct is communicated with the indoor air outlet, and the other end of each air outlet duct extends to the indoor space.

8. The five-constant air conditioning system according to claim 4, characterized in that, The fresh air unit further includes: First air valve, arranged in the machine body and located at the outdoor fresh air inlet, and is used to open or close the outdoor fresh air inlet.

9. The five-constant air-conditioning system according to claim 4, characterized in that, The fresh air unit further includes: Second air valve, arranged in the machine body and located at the indoor air return opening, and is used to open or close the indoor air return opening.

10. The five-constant air conditioning system according to any one of claims 4 to 9, characterized in that, The fresh air unit further includes: Filter module, arranged in the machine body, and covering the indoor air return opening and the outdoor fresh air inlet, and is used to filter the air flowing into the machine body from the indoor air return opening and the outdoor fresh air inlet.

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