Constant-temperature dehumidification multi-split air conditioning system

Abstract

The constant-temperature dehumidification multi-split air conditioning system comprises an air conditioning system outdoor unit, a constant-temperature dehumidification unit and a constant-temperature dehumidification unit, the constant-temperature dehumidification indoor unit comprises a first evaporator and a second evaporator which are independent and communicated with each other; the air conditioning system outdoor unit communicates with the first evaporator and the second evaporator through a high-pressure air pipe and a liquid pipe. The air conditioning system outdoor unit further communicates with the first evaporator through a low-pressure air pipe. The high-pressure air pipe is provided with an electromagnetic valve set at the position of a pipeline communicating with the first evaporator and the second evaporator, and the electromagnetic valve set is used for conducting control over whether the high-pressure air flows to the first evaporator and / or the second evaporator or not. When the multi-split air-conditioning system operates in the heating mode or the refrigerating mode, the first evaporator and the second evaporator of the constant-temperature dehumidification inner unit can work together, one evaporator is prevented from being in an idle state, the overall air volume and cold / heat of the multi-split air-conditioning system are guaranteed, the using effect of the multi-split air-conditioning system is guaranteed, and the service life of the multi-split air-conditioning system is prolonged. And the use experience of a user on the multi-split air conditioning system is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning system technology, and more specifically, to a constant temperature and dehumidification multi-split air conditioning system. Background Technology

[0002] Humidity affects human comfort by influencing body temperature regulation, the respiratory system, skin condition, and psychological feelings. High humidity hinders sweat evaporation, leading to a stuffy feeling and increasing the risk of heatstroke. It also promotes the growth of bacteria and fungi, causing respiratory problems and skin infections. Low humidity, on the other hand, can cause dry skin, respiratory irritation, and static electricity, reducing comfort. The appropriate humidity range (40-60%) can balance evaporative heat dissipation and moisture retention, maintaining physiological stability and psychological well-being. Different people have different sensitivities to humidity changes, so proper humidity control is crucial for overall comfort.

[0003] Currently, dehumidifying multi-split air conditioning systems are developing rapidly, showing a trend towards diversification, intelligence, and high efficiency; market demand is also growing significantly, especially in high-humidity areas and with increased attention to air quality after the pandemic. Dehumidifying multi-split air conditioning systems have become the mainstream choice for many commercial venues, residential and industrial settings due to their flexible zone control and energy-saving features.

[0004] Existing constant temperature dehumidification (i.e., dehumidification without cooling) multi-split air conditioning systems mainly consist of a first evaporator and a second evaporator in their dehumidification indoor unit. They achieve dehumidification without cooling by using the first evaporator for cooling and the second evaporator for heating. However, when the multi-split air conditioning system is running in heating or cooling mode, one of the evaporators will not participate in heat exchange and will be in an idle state. This will lead to a reduction in the overall air volume and cooling / heating capacity of the multi-split air conditioning system, affecting the performance of the multi-split air conditioning system and consequently impacting the user's experience. Summary of the Invention

[0005] The purpose of this application is to provide a constant temperature and dehumidification multi-split air conditioning system that, when the multi-split air conditioning system is running in heating or cooling mode, allows the first and second evaporators of the constant temperature and dehumidification indoor unit to work together, avoiding one of the evaporators being idle, ensuring the overall air volume and cooling / heating capacity of the multi-split air conditioning system, thereby ensuring that the performance of the multi-split air conditioning system is not affected and improving the user's experience with the multi-split air conditioning system.

[0006] To achieve the above objectives, this application provides a constant temperature and dehumidification multi-split air conditioning system, comprising: outdoor unit of air conditioning system; A constant temperature and dehumidification indoor unit, the constant temperature and dehumidification indoor unit includes an independent first evaporator and a second evaporator, the first evaporator and the second evaporator being connected in communication; The outdoor unit of the air conditioning system is connected to the first evaporator and the second evaporator through a high-pressure gas pipe and a liquid pipe; the outdoor unit of the air conditioning system is also connected to the first evaporator through a low-pressure gas pipe; The high-pressure gas pipe is equipped with a solenoid valve group at the location where the pipe connects the first evaporator and the second evaporator. The solenoid valve group is used to control whether the high-pressure gas can flow to the first evaporator and / or the second evaporator.

[0007] In the implementation of the above technical solution, the constant temperature and dehumidification multi-split air conditioning system is equipped with a high-pressure gas pipe, which allows the outdoor unit of the air conditioning system to deliver high-pressure gas to the first evaporator and the second evaporator through the high-pressure gas pipe. The system can also control the opening or closing of the solenoid valves in the solenoid valve group according to the operating mode (dehumidification, cooling, or heating) of the constant temperature and dehumidification multi-split air conditioning system, thereby controlling whether the high-pressure gas can flow to the first evaporator and / or the second evaporator. This ensures that the first and second evaporators of the constant temperature and dehumidification indoor unit can operate simultaneously in different operating modes of the system, preventing one evaporator from being idle and not participating in heat exchange. This ensures the overall airflow and cooling / heating capacity of the multi-split air conditioning system in different operating modes, thus ensuring that the performance of the multi-split air conditioning system is not affected and improving the user experience.

[0008] In a preferred embodiment of this application, the solenoid valve assembly includes a first solenoid valve and a second solenoid valve. The first solenoid valve is located at the position of the high-pressure gas pipe in the pipeline connecting to the first evaporator, and is used to control whether the high-pressure gas can flow to the first evaporator. The second solenoid valve is located at the position of the high-pressure gas pipe connecting the first evaporator and the first evaporator. In the direction of high-pressure gas flow, the high-pressure gas first flows through the second solenoid valve and then through the first solenoid valve. The second solenoid valve can be used to control whether the high-pressure gas can flow to the first evaporator and the second evaporator.

[0009] In the implementation of the above technical solution, the solenoid valve group adopts a first solenoid valve and a second solenoid valve. The positions of the first solenoid valve and the second solenoid valve are relatively reasonable, which can easily and accurately realize the conduction control of whether the high-pressure gas can flow to the first evaporator and / or the second evaporator.

[0010] In a preferred embodiment of this application, when the constant temperature and dehumidification multi-split air conditioning system is operating in dehumidification mode, The first solenoid valve is closed and the second solenoid valve is opened, allowing high-pressure gas to flow to the second evaporator and condense into liquid refrigerant. At the same time, the liquid refrigerant condensed by the outdoor unit of the air conditioning system merges with the liquid refrigerant flowing out of the second evaporator through the liquid pipe and flows to the first evaporator. The first evaporator exchanges heat with the indoor air and evaporates into liquid refrigerant, so that the first evaporator and the second evaporator can operate together.

[0011] In the implementation of the above technical solution, by closing the first solenoid valve and opening the second solenoid valve, the high-pressure gas can only flow to the second evaporator. Through the connection between the first evaporator and the second evaporator, the first and second evaporators can be operated together when the constant temperature dehumidification multi-split air conditioning system is running in dehumidification mode.

[0012] In a preferred embodiment of this application, when the constant temperature and dehumidification multi-split air conditioning system is operating in cooling mode, The first solenoid valve opens and the second solenoid valve closes, preventing high-pressure gas from flowing to the first and second evaporators. Liquid refrigerant flowing from the outdoor unit of the air conditioning system through the liquid pipe flows to the first and second evaporators respectively, exchanging heat with the indoor air and absorbing heat to evaporate into low-pressure gas. The low-pressure gas flowing out of the first evaporator returns to the outdoor unit of the air conditioning system through the low-pressure gas pipe, and the low-pressure gas flowing out of the second evaporator merges with the low-pressure gas flowing out of the first evaporator after passing through the first solenoid valve, and then returns to the outdoor unit of the air conditioning system.

[0013] In the implementation of the above technical solution, by opening the first solenoid valve and closing the second solenoid valve, the high-pressure gas cannot flow to the first evaporator and the second evaporator, so that the liquid refrigerant flowing out of the outdoor unit of the air conditioning system flows to the first evaporator and the second evaporator respectively. In this way, the first evaporator and the second evaporator can be operated together when the constant temperature and dehumidification multi-split air conditioning system is running in cooling mode.

[0014] In a preferred embodiment of this application, when the constant temperature and dehumidification multi-split air conditioning system is operating in heating mode, The first solenoid valve is open and the second solenoid valve is closed, preventing high-pressure gas from flowing to the first and second evaporators. The high-pressure gas flowing out of the outdoor unit of the air conditioning system is diverted by the four-way valve of the outdoor unit and flows to the first and second evaporators through the low-pressure gas pipe. Part of the high-pressure gas directly enters the first evaporator for heat exchange and condenses into liquid refrigerant. The other part of the high-pressure gas enters the second evaporator through the first solenoid valve for heat exchange and condenses into liquid refrigerant. It then merges with the liquid refrigerant flowing out of the first evaporator and returns to the outdoor unit of the air conditioning system through the liquid pipe for heat exchange.

[0015] In the implementation of the above technical solution, by opening the first solenoid valve and closing the second solenoid valve, the high-pressure gas cannot flow to the first evaporator and the second evaporator. Instead, it flows to the first evaporator and the second evaporator through the low-pressure gas pipe after being diverted by the four-way valve of the outdoor unit of the air conditioning system. In this way, the first evaporator and the second evaporator can be operated together when the constant temperature dehumidification multi-split air conditioning system is running in heating mode.

[0016] In a preferred embodiment of this application, both the first evaporator and the second evaporator are equipped with electronic expansion valves, which are used to adjust the cooling load or heating load of the constant temperature dehumidification indoor unit.

[0017] In the implementation of the above technical solution, both the first evaporator and the second evaporator are equipped with electronic expansion valves. In actual use, the opening degree of the electronic expansion valve can be adjusted appropriately according to the cooling or heating temperature set by the user, or one of the electronic expansion valves can be turned on / off to adjust the cooling or heating load of the constant temperature dehumidifier indoor unit. This avoids the constant temperature dehumidifier indoor unit from shutting down when the user sets a certain temperature in cooling or heating mode, thus ensuring the user's experience.

[0018] In a preferred embodiment of this application, a high-pressure gas pipe valve is provided on the high-pressure gas pipe, a liquid pipe valve is provided on the liquid pipe, and a low-pressure gas pipe valve is provided on the low-pressure gas pipe.

[0019] In the implementation of the above technical solution, valves are installed on the high-pressure gas pipe, liquid pipe and low-pressure gas pipe. In actual use, the opening and closing of the high-pressure gas pipe, liquid pipe or low-pressure gas pipe can be realized by controlling the corresponding valves, which can facilitate the use and control of the constant temperature and dehumidification multi-split air conditioning system, making the control more intelligent and precise.

[0020] In a preferred embodiment of this application, one or more constant temperature and dehumidification indoor units are provided, and each constant temperature and dehumidification indoor unit is connected to the outdoor unit of the air conditioning system.

[0021] In the implementation of the above technical solution, multiple constant temperature dehumidification indoor units can be set up. Each constant temperature dehumidification indoor unit adopts the same connection structure to connect with the outdoor unit of the air conditioning system. In this way, the number of constant temperature dehumidification indoor units can be better arranged according to the user's needs, thereby improving the user experience.

[0022] In a preferred embodiment of this application, the constant temperature and dehumidification multi-split air conditioning system further includes an indoor air conditioning unit, which has an evaporator; The outdoor unit of the air conditioning system is connected to the evaporator of the indoor unit of the air conditioner via a liquid pipe and a low-pressure gas pipe.

[0023] In the implementation of the above technical solution, the constant temperature and dehumidification multi-split air conditioning system can also be equipped with an indoor air conditioning unit. The indoor air conditioning unit has an evaporator and is a conventionally used indoor air conditioning unit. In actual use, only the indoor air conditioning unit can be operated. The setting of the indoor air conditioning unit can meet more user needs, so that the constant temperature and dehumidification multi-split air conditioning system can have more usage methods.

[0024] In a preferred embodiment of this application, one or more indoor air conditioning units are provided, and each indoor air conditioning unit is connected to the outdoor unit of the air conditioning system.

[0025] In the implementation of the above technical solution, multiple indoor air conditioning units can be installed. Each indoor air conditioning unit adopts the same connection structure to connect with the outdoor unit of the air conditioning system. In this way, the number of indoor air conditioning units can be better arranged according to the user's needs, thereby improving the user experience.

[0026] This application discloses a constant temperature and dehumidification multi-split air conditioning system, which, compared with the prior art, has at least the following advantages: The constant temperature and dehumidification multi-split air conditioning system of this application includes an outdoor unit and a constant temperature and dehumidification indoor unit. The indoor unit includes an independent first evaporator and a second evaporator, which are connected in series. The outdoor unit connects the first and second evaporators via a high-pressure gas pipe and a liquid pipe, and also connects to the first evaporator via a low-pressure gas pipe. A solenoid valve assembly is installed at the point where the high-pressure gas pipe connects the first and second evaporators to control the flow of high-pressure gas to the first and / or second evaporators. This constant temperature and dehumidification multi-split air conditioning system is equipped with a high-pressure gas pipe, allowing the outdoor unit to supply gas to the first and second evaporators via the high-pressure gas pipe. High-pressure gas can be used to control the opening and closing of the solenoid valves in the solenoid valve group according to the operating mode (dehumidification, cooling, or heating) of the constant temperature and dehumidification multi-split air conditioning system. This controls whether the high-pressure gas can flow to the first evaporator and / or the second evaporator, so that the first and second evaporators of the constant temperature and dehumidification indoor unit can operate together in different operating modes of the constant temperature and dehumidification multi-split air conditioning system. This avoids one evaporator not participating in heat exchange and being idle. In this way, the overall air volume and cooling / heating capacity of the multi-split air conditioning system can be guaranteed in different operating modes, thereby ensuring that the performance of the multi-split air conditioning system is not affected and improving the user experience of the multi-split air conditioning system. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the constant temperature and dehumidification multi-split air conditioning system provided in the embodiments of this application; Figure 2 This is a schematic diagram illustrating the structure of the high-pressure gas pipe of a multi-split air conditioning system for constant temperature and dehumidification, provided in an embodiment of this application. Figure 3 This is a schematic diagram illustrating the structure of the liquid pipe of a multi-split air conditioning system for constant temperature and dehumidification, provided in an embodiment of this application. Figure 4 This is a schematic diagram illustrating the structure of the low-pressure gas pipe of a multi-split air conditioning system for constant temperature and dehumidification, provided in an embodiment of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0034] Existing constant temperature dehumidification (i.e., dehumidification without cooling) multi-split air conditioning systems mainly consist of a first evaporator and a second evaporator in their dehumidification indoor unit. They achieve dehumidification without cooling by using the first evaporator for cooling and the second evaporator for heating. However, when the multi-split air conditioning system is running in heating or cooling mode, one of the evaporators will not participate in heat exchange and will be in an idle state. This will lead to a reduction in the overall air volume and cooling / heating capacity of the multi-split air conditioning system, affecting the performance of the multi-split air conditioning system and consequently impacting the user's experience.

[0035] To address the problems in the prior art, this application provides a constant temperature and dehumidification multi-split air conditioning system. When the multi-split air conditioning system is running in heating or cooling mode, the first and second evaporators of the constant temperature and dehumidification indoor unit can work together, preventing one of the evaporators from being idle. This ensures the overall air volume and cooling / heating capacity of the multi-split air conditioning system, thereby ensuring that the performance of the multi-split air conditioning system is not affected and improving the user's experience with the multi-split air conditioning system.

[0036] Example 1 See Figures 1 to 4 ,in, Figures 1 to 4 In a multi-split air conditioning system, the outdoor unit is the air conditioning system outdoor unit, and the regular indoor unit is the air conditioning indoor unit; Figure 2 In the image, the bolded lines represent the high-pressure gas pipeline. Figure 3 In the image, the bolded lines represent the piping of the liquid pipes. Figure 4 In the middle, the bolded lines represent the low-pressure gas pipes.

[0037] The constant temperature and dehumidification multi-split air conditioning system of this application embodiment includes: outdoor unit of air conditioning system; The constant temperature and dehumidification indoor unit includes an independent first evaporator and a second evaporator, which are connected to each other. The outdoor unit of the air conditioning system is connected to the first evaporator and the second evaporator through a high-pressure gas pipe and a liquid pipe; the outdoor unit of the air conditioning system is also connected to the first evaporator through a low-pressure gas pipe. A solenoid valve assembly is installed at the location where the high-pressure gas pipe connects the first evaporator and the second evaporator. The solenoid valve assembly is used to control whether the high-pressure gas can flow to the first evaporator and / or the second evaporator.

[0038] In this embodiment, the outdoor unit of the air conditioning system includes components such as a condenser, indoor fan, oil separator, inverter compressor, gas-liquid separator, and four-way valve. For the connection structure of each component of the outdoor unit, please refer to [reference needed]. Figure 1 The structural diagram is not described in detail here.

[0039] In this embodiment, a constant temperature dehumidification indoor unit is provided. The first evaporator and the second evaporator of the constant temperature dehumidification indoor unit can operate independently, and the first evaporator and the second evaporator are connected to each other and can operate in coordination.

[0040] In this embodiment, the constant temperature and dehumidification multi-split air conditioning system is a three-pipe multi-split air conditioning system. The constant temperature and dehumidification multi-split air conditioning system is equipped with a high-pressure gas pipe, a liquid pipe and a low-pressure gas pipe. It can be understood that the solenoid valve group has at least two solenoid valves. By controlling the solenoid valves in the solenoid valve group, the flow of high-pressure gas to the first evaporator and / or the second evaporator can be controlled.

[0041] Specifically, in this embodiment, the solenoid valve assembly includes a first solenoid valve and a second solenoid valve. The first solenoid valve is located at the position of the high-pressure gas pipe in the pipeline connecting to the first evaporator, and is used to control whether the high-pressure gas can flow to the first evaporator. The second solenoid valve is located at the position of the high-pressure gas pipe connecting the first evaporator and the second evaporator. When both the first and second solenoid valves are open, the high-pressure gas flows through the second solenoid valve first and then through the first solenoid valve. The second solenoid valve can be used to control whether the high-pressure gas can flow to the first and second evaporators.

[0042] In the above structure, the solenoid valve group adopts a first solenoid valve and a second solenoid valve. The positions of the first solenoid valve and the second solenoid valve are relatively reasonable, which can easily and accurately realize the conduction control of whether the high-pressure gas can flow to the first evaporator and / or the second evaporator.

[0043] It should be noted that in other embodiments, the solenoid valve assembly may also include a third solenoid valve. The third solenoid valve may be located at the position of the high-pressure gas pipe in the pipeline connecting to the second evaporator. Along the flow direction of the high-pressure gas, the high-pressure gas first flows through the second solenoid valve, and then flows through the first solenoid valve and the third solenoid valve.

[0044] For example, in this embodiment, when the constant temperature and dehumidification multi-split air conditioning system is running in dehumidification mode, the first solenoid valve can be controlled to close and the second solenoid valve can be opened, so that the high-pressure gas flows to the second evaporator. After exchanging heat with the indoor air, it condenses into liquid refrigerant. At the same time, the liquid refrigerant condensed by the outdoor unit of the air conditioning system merges with the liquid refrigerant flowing out of the second evaporator through the liquid pipe and flows to the first evaporator. Through the first evaporator, it exchanges heat with the indoor air and evaporates into liquid refrigerant. Then it can return to the outdoor unit of the air conditioning system through the low-pressure gas pipe for the next cycle. In this way, the first evaporator and the second evaporator can operate together.

[0045] In the above process, by closing the first solenoid valve and opening the second solenoid valve, the high-pressure gas can only flow to the second evaporator. Through the connection between the first evaporator and the second evaporator, the first and second evaporators can be operated together when the constant temperature dehumidification multi-split air conditioning system is running in dehumidification mode.

[0046] For example, in this embodiment, when the constant temperature and dehumidification multi-split air conditioning system is running in cooling mode, the first solenoid valve can be opened and the second solenoid valve can be closed, so that the high-pressure gas cannot flow to the first evaporator and the second evaporator. The liquid refrigerant flowing out of the outdoor unit of the air conditioning system through the liquid pipe flows to the first evaporator and the second evaporator respectively, and exchanges heat with the indoor air (at this time, both the first evaporator and the second evaporator achieve the cooling effect). It absorbs heat and evaporates into low-pressure gas. Furthermore, the low-pressure gas flowing out of the first evaporator can return to the outdoor unit of the air conditioning system through the low-pressure gas pipe. The low-pressure gas flowing out of the second evaporator passes through the first solenoid valve and merges with the low-pressure gas flowing out of the first evaporator before returning to the outdoor unit of the air conditioning system.

[0047] In the above process, by opening the first solenoid valve and closing the second solenoid valve, the high-pressure gas cannot flow to the first evaporator and the second evaporator, and the liquid refrigerant flowing out of the outdoor unit of the air conditioning system flows to the first evaporator and the second evaporator respectively. In this way, the first evaporator and the second evaporator can be operated together when the constant temperature and dehumidification multi-split air conditioning system is running in cooling mode.

[0048] For example, in this embodiment, when the constant temperature and dehumidification multi-split air conditioning system is running in heating mode, the first solenoid valve can be opened and the second solenoid valve can be closed, so that the high-pressure gas cannot flow to the first evaporator and the second evaporator. The high-pressure gas flowing out of the outdoor unit of the air conditioning system is diverted by the four-way valve of the outdoor unit and flows to the first evaporator and the second evaporator through the low-pressure gas pipe. Part of the high-pressure gas directly enters the first evaporator for heat exchange and condenses into liquid refrigerant. The other part of the high-pressure gas enters the second evaporator through the first solenoid valve for heat exchange (at this time, both the first evaporator and the second evaporator achieve the heating effect). After condensing into liquid refrigerant, it merges with the liquid refrigerant flowing out of the first evaporator and returns to the outdoor unit of the air conditioning system through the liquid pipe for heat exchange.

[0049] In the above process, by opening the first solenoid valve and closing the second solenoid valve, the high-pressure gas cannot flow to the first and second evaporators. Instead, it flows to the first and second evaporators through the low-pressure gas pipe after being diverted by the four-way valve of the outdoor unit of the air conditioning system. This can effectively ensure that the first and second evaporators operate together when the constant temperature and dehumidification multi-split air conditioning system is in heating mode.

[0050] It should be noted that, in this embodiment, the constant temperature and dehumidification multi-split air conditioning system may not have an indoor unit. The indoor unit is the same as the indoor unit of the air conditioning system used daily, and the indoor unit has an evaporator. The constant temperature and dehumidification multi-split air conditioning system may operate with only the outdoor unit and the constant temperature and dehumidification indoor unit.

[0051] The constant temperature and dehumidification multi-split air conditioning system of this application embodiment is equipped with a high-pressure gas pipe, which allows the outdoor unit of the air conditioning system to supply high-pressure gas to the first evaporator and the second evaporator through the high-pressure gas pipe. The opening and closing of the solenoid valves in the solenoid valve group can be controlled according to the operating mode (dehumidification, cooling, or heating) of the constant temperature and dehumidification multi-split air conditioning system, thereby controlling whether the high-pressure gas can flow to the first evaporator and / or the second evaporator. By combining with the liquid pipe and the low-pressure gas pipe, the first and second evaporators of the constant temperature and dehumidification indoor unit can operate simultaneously in different operating modes of the constant temperature and dehumidification multi-split air conditioning system. This avoids one evaporator not participating in heat exchange and remaining idle. This ensures the overall air volume and cooling / heating capacity of the multi-split air conditioning system in different operating modes, thus ensuring that the performance of the multi-split air conditioning system is not affected and improving the user experience.

[0052] Example 2 See Figures 1 to 4Based on the above embodiment one, the difference between this embodiment and embodiment one is that in the constant temperature and dehumidification multi-split air conditioning system of this embodiment, both the first evaporator and the second evaporator are equipped with electronic expansion valves, which are used to adjust the cooling load or heating load of the constant temperature and dehumidification indoor unit.

[0053] In the above structure, both the first evaporator and the second evaporator are equipped with electronic expansion valves. In actual use, the opening degree of the electronic expansion valve can be adjusted appropriately according to the cooling or heating temperature set by the user, or one of the electronic expansion valves can be turned on / off to adjust the cooling or heating load of the constant temperature dehumidifier indoor unit. This prevents the constant temperature dehumidifier indoor unit from shutting down when the user sets a certain temperature in cooling or heating mode, thus ensuring the user's experience.

[0054] For example, when the constant temperature and dehumidification multi-split air conditioning system is running in cooling mode, the current indoor temperature T can be detected. If: (1) T < T 目标 When the temperature is -2℃ and t≥5min, T 目标 The target temperature is set, and t represents the time required to reach the target temperature. If the current load is low, the output needs to be reduced to decrease energy consumption, while avoiding shutdown when the target temperature is reached. At this time, the electronic expansion valve of the second evaporator can be closed, so that the low-pressure gas that would normally flow back to the outdoor unit of the air conditioning system through the second evaporator cannot flow. This causes the second evaporator to lose its heat exchange effect, and only the first evaporator works normally. This operation can reduce the cooling capacity of the constant temperature dehumidification indoor unit. (2) T≥T 目标 +1℃, and t≥10min, where T 目标 The target temperature is set, and t represents the time required to reach the target temperature. When the constant temperature dehumidification indoor unit is in a low output state and meets the preconditions, it is determined that the current indoor temperature is high and the cooling capacity needs to be increased. At this time, the electronic expansion valve of the second evaporator is reopened and switched to full load output state.

[0055] For example, when the constant temperature and dehumidification multi-split air conditioning system is running in heating mode, the current indoor temperature T can be detected. If: (1) T > T 目标 +1℃, and t≥5min, where T 目标 The target temperature is set, and t represents the time required to reach the target temperature. If the current load is low, the electronic expansion valve of the second evaporator is closed, preventing the high-pressure gas that could normally enter the second evaporator from flowing, thus causing the second evaporator to lose its heating effect. (2)T≤T 目标 When the temperature is -2℃ and t≥10min, T目标 The target temperature is set, and t represents the time required to reach the target temperature. When the constant temperature dehumidifier is in a low output state and the preconditions are met, it is determined that the current indoor temperature is low and the heat output needs to be increased. This causes the electronic expansion valve of the second evaporator to reopen and return to the full load output state.

[0056] Example 3 See Figures 1 to 4 Based on the above embodiment one or embodiment two, the difference between this embodiment and embodiment one or embodiment two is that the constant temperature dehumidification multi-split air conditioning system of this embodiment is equipped with a high pressure gas pipe valve on the high pressure gas pipe, a liquid pipe valve on the liquid pipe, and a low pressure gas pipe valve on the low pressure gas pipe.

[0057] In the above structure, valves are installed on the high-pressure gas pipe, liquid pipe and low-pressure gas pipe. In actual use, the opening and closing of the high-pressure gas pipe, liquid pipe or low-pressure gas pipe can be realized by controlling the corresponding valves, which facilitates the use and control of the constant temperature and dehumidification multi-split air conditioning system and makes the control more intelligent and precise.

[0058] Example 4 See Figures 1 to 4 Based on any of the above embodiments one to three, the difference between this embodiment and any of the embodiments one to three is that the constant temperature and dehumidification multi-split air conditioning system in this embodiment has multiple constant temperature and dehumidification indoor units, and each constant temperature and dehumidification indoor unit is connected to the outdoor unit of the air conditioning system.

[0059] In this embodiment, there may be two, three, or even more constant temperature and dehumidification indoor units. Each constant temperature and dehumidification indoor unit may adopt the same structure, and each constant temperature and dehumidification indoor unit may adopt the same connection structure to connect with the outdoor unit of the air conditioning system.

[0060] In the implementation of the above technical solution, multiple constant temperature dehumidification indoor units can be set up. Each constant temperature dehumidification indoor unit adopts the same connection structure to connect with the outdoor unit of the air conditioning system. In this way, the number of constant temperature dehumidification indoor units can be better arranged according to the user's needs, thereby improving the user experience.

[0061] Example 5 See Figures 1 to 4 Based on any of the above embodiments one to four, the difference between this embodiment and any of the above embodiments one to four is that the constant temperature and dehumidification multi-split air conditioning system of this embodiment also includes an indoor air conditioning unit, and the indoor air conditioning unit has an evaporator; The outdoor unit of the air conditioning system is connected to the evaporator of the indoor unit through liquid pipes and low-pressure gas pipes.

[0062] In this embodiment, the indoor unit of the air conditioner is the indoor unit of the air conditioning system used in daily life. This type of indoor unit has an evaporator and has the same functions as the indoor unit of the air conditioning system used in daily life.

[0063] In the above structure, the constant temperature and dehumidification multi-split air conditioning system can also be equipped with an indoor air conditioning unit. The indoor air conditioning unit has an evaporator and is a conventionally used indoor air conditioning unit. In actual use, only the indoor air conditioning unit can be operated. The setting of the indoor air conditioning unit can meet more user needs, so that the constant temperature and dehumidification multi-split air conditioning system can be used in more ways.

[0064] Preferably, in this embodiment, one or more indoor air conditioning units are provided, and each indoor air conditioning unit is connected to the outdoor unit of the air conditioning system.

[0065] Specifically, there can be two, three, or even more indoor air conditioning units. Each indoor air conditioning unit can adopt the same structure or configuration, and each indoor air conditioning unit can be connected to the outdoor unit of the air conditioning system using the same connection structure.

[0066] In the above structure, multiple indoor air conditioning units can be installed, and each indoor air conditioning unit is connected to the outdoor unit of the air conditioning system using the same connection structure. This allows for a better arrangement of the number of indoor air conditioning units according to the user's needs, thereby improving the user experience.

[0067] In all the above embodiments, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0068] It should be understood that phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0069] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0070] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A multi-split air conditioning system for constant temperature and dehumidification, characterized in that, include: outdoor unit of air conditioning system; A constant temperature and dehumidification indoor unit, the constant temperature and dehumidification indoor unit includes an independent first evaporator and a second evaporator, the first evaporator and the second evaporator being connected in communication; The outdoor unit of the air conditioning system is connected to the first evaporator and the second evaporator through a high-pressure gas pipe and a liquid pipe; the outdoor unit of the air conditioning system is also connected to the first evaporator through a low-pressure gas pipe; The high-pressure gas pipe is equipped with a solenoid valve assembly at the location where it connects the first evaporator and the second evaporator. The solenoid valve assembly is used to control whether the high-pressure gas can flow to the first evaporator and / or the second evaporator.

2. The constant temperature and dehumidification multi-split air conditioning system according to claim 1, characterized in that, The solenoid valve assembly includes a first solenoid valve and a second solenoid valve. The first solenoid valve is located at the position of the high-pressure gas pipe in the pipeline connecting to the first evaporator, and is used to control whether the high-pressure gas can flow to the first evaporator. The second solenoid valve is located at the position of the high-pressure gas pipe connecting the first evaporator and the first evaporator. In the direction of high-pressure gas flow, the high-pressure gas first flows through the second solenoid valve and then through the first solenoid valve. The second solenoid valve can be used to control whether the high-pressure gas can flow to the first evaporator and the second evaporator.

3. The constant temperature and dehumidification multi-split air conditioning system according to claim 2, characterized in that, When the constant temperature and dehumidification multi-split air conditioning system is running in dehumidification mode... The first solenoid valve is closed and the second solenoid valve is opened, allowing high-pressure gas to flow to the second evaporator and condense into liquid refrigerant. At the same time, the liquid refrigerant condensed by the outdoor unit of the air conditioning system merges with the liquid refrigerant flowing out of the second evaporator through the liquid pipe and flows to the first evaporator. The first evaporator exchanges heat with the indoor air and evaporates into liquid refrigerant, so that the first evaporator and the second evaporator can operate together.

4. The constant temperature and dehumidification multi-split air conditioning system according to claim 2, characterized in that, When the constant temperature and dehumidification multi-split air conditioning system is running in cooling mode The first solenoid valve opens and the second solenoid valve closes, preventing high-pressure gas from flowing to the first and second evaporators. Liquid refrigerant flowing from the outdoor unit of the air conditioning system through the liquid pipe flows to the first and second evaporators respectively, exchanging heat with the indoor air and absorbing heat to evaporate into low-pressure gas. The low-pressure gas flowing out of the first evaporator returns to the outdoor unit of the air conditioning system through the low-pressure gas pipe, and the low-pressure gas flowing out of the second evaporator merges with the low-pressure gas flowing out of the first evaporator after passing through the first solenoid valve, and then returns to the outdoor unit of the air conditioning system.

5. The constant temperature and dehumidification multi-split air conditioning system according to claim 2, characterized in that, When the constant temperature and dehumidification multi-split air conditioning system is running in heating mode... The first solenoid valve is open and the second solenoid valve is closed, preventing high-pressure gas from flowing to the first and second evaporators. The high-pressure gas flowing out of the outdoor unit of the air conditioning system is diverted by the four-way valve of the outdoor unit and flows to the first and second evaporators through the low-pressure gas pipe. Part of the high-pressure gas directly enters the first evaporator for heat exchange and condenses into liquid refrigerant. The other part of the high-pressure gas enters the second evaporator through the first solenoid valve for heat exchange and condenses into liquid refrigerant. It then merges with the liquid refrigerant flowing out of the first evaporator and returns to the outdoor unit of the air conditioning system through the liquid pipe for heat exchange.

6. The constant temperature and dehumidification multi-split air conditioning system according to any one of claims 1-5, characterized in that, Both the first evaporator and the second evaporator are equipped with electronic expansion valves, which are used to adjust the cooling load or heating load of the constant temperature dehumidification indoor unit.

7. The constant temperature and dehumidification multi-split air conditioning system according to any one of claims 1-5, characterized in that, The high-pressure gas pipe is equipped with a high-pressure gas pipe valve, the liquid pipe is equipped with a liquid pipe valve, and the low-pressure gas pipe is equipped with a low-pressure gas pipe valve.

8. The constant temperature and dehumidification multi-split air conditioning system according to any one of claims 1-5, characterized in that, One or more constant temperature dehumidification indoor units are provided, and each constant temperature dehumidification indoor unit is connected to the outdoor unit of the air conditioning system.

9. The constant temperature and dehumidification multi-split air conditioning system according to any one of claims 1-5, characterized in that, The constant temperature and dehumidification multi-split air conditioning system also includes an indoor air conditioning unit, which has an evaporator; The outdoor unit of the air conditioning system is connected to the evaporator of the indoor unit of the air conditioner via a liquid pipe and a low-pressure gas pipe.

10. The constant temperature and dehumidification multi-split air conditioning system according to claim 9, characterized in that, The air conditioner has one or more indoor units, and each indoor unit is connected to the outdoor unit of the air conditioning system.

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