Air conditioning system

Abstract

The invention discloses an air conditioning system, and belongs to the technical field of air conditioners, the air conditioning system comprises an indoor unit, the indoor unit comprises a heating tail end, a first refrigeration tail end, a second refrigeration tail end, a first temperature sensor, a second temperature sensor, a third temperature sensor, a humidity sensor and a controller; the heating tail end heats the indoor environment in a radiation heat exchange mode. The first refrigeration tail end refrigerates the indoor environment in a heat convection mode. The second refrigeration tail end refrigerates the indoor environment in a radiation heat exchange mode; the first temperature sensor is used for detecting the indoor environment temperature; the second temperature sensor is used for detecting the temperature of the second refrigeration tail end; and the humidity sensor is matched with the third temperature sensor to detect the moisture content of the indoor environment. According to the air conditioning system, the difference value of the dew point temperature of the current indoor environment, the temperature of the second refrigeration terminal and the dew point temperature of the current indoor environment serves as a judgment target so as to control the first refrigeration terminal and / or the second refrigeration terminal to work.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to an air conditioning system. Background Art

[0002] Most traditional air conditioners use the convection method for refrigeration or heating. When the air conditioner is working, there is often a blowing feeling, uneven hot and cold distribution in the room, and it is also unable to control the indoor humidity well, resulting in an uncomfortable feeling for users. With the progress of technology, the central air conditioning system combining traditional air conditioners with radiant heat exchange has been more and more favored by people.

[0003] Existing household central air conditioners mostly use duct machines for dehumidification and ground radiation for refrigeration. Since the dehumidification principle of duct machines is cooling dehumidification, there is a coupling relationship between dehumidification and cooling, and it is difficult to meet the requirements of indoor temperature and humidity at the same time. When the ground radiates heat, in order to reduce the room humidity, the air conditioning system still uses the duct machine for cooling dehumidification, resulting in the cancellation of heat and cold in the indoor environment and causing energy waste. And the existing duct machines usually do not have a humidification function. If the indoor environment needs humidification, an additional humidifier needs to be configured. Since dehumidification and humidification are carried out by different devices respectively, the judgment conditions for humidification are complex, and the additionally set humidifier cannot be linked and controlled with the air conditioning system, making it difficult to keep the room temperature and humidity stable and also difficult to meet the comfort requirements of the room.

[0004] In view of this, this application is proposed. Summary of the Invention

[0005] In view of the deficiencies in the related art, this application provides an air conditioning system that performs dehumidification and humidification on the indoor environment by setting a fresh air dehumidifier and humidifier, and uses the dew point temperature of the current indoor environment, the temperature of the second refrigeration terminal, and the difference between the temperature of the second refrigeration terminal and the dew point temperature of the current indoor environment as the judgment targets to better control the operation of the first refrigeration terminal and / or the second refrigeration terminal.

[0006] The present invention provides an air conditioning system, including an indoor unit, and the indoor unit includes:

[0007] A heating terminal that heats the indoor environment by means of radiant heat exchange;

[0008] A first refrigeration terminal that cools the indoor environment by means of convective heat exchange;

[0009] A second refrigeration terminal that cools the indoor environment by means of radiant heat exchange;

[0010] A fresh air dehumidifier and humidifier for humidifying or dehumidifying the indoor environment;

[0011] A first temperature sensor for detecting the indoor environment temperature;

[0012] A second temperature sensor for detecting the temperature of the second refrigeration terminal;

[0013] A third temperature sensor;

[0014] A humidity sensor, which cooperates with the third temperature sensor to detect the moisture content of the indoor environment;

[0015] A controller, which is preset with a temperature set value, a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold, a sixth temperature threshold, a seventh temperature threshold, and an eighth temperature threshold;

[0016] The controller is configured to:

[0017] Obtain the difference between the indoor environment temperature and the temperature set value as the first difference;

[0018] Obtain the dew point temperature of the current indoor environment, and obtain the difference between the temperature of the second refrigeration terminal and the dew point temperature of the current indoor environment as the second difference;

[0019] When the first difference is greater than the first temperature threshold, control the first refrigeration terminal to cool the indoor environment;

[0020] When the first difference is less than or equal to the second temperature threshold, control the first refrigeration terminal to stop cooling the indoor environment;

[0021] When the first difference is greater than the third temperature threshold and the temperature of the second refrigeration terminal is greater than the fourth temperature threshold, and the second difference is greater than the fifth temperature threshold, control the second refrigeration terminal to cool the indoor environment;

[0022] When the first difference is less than the sixth temperature threshold, or the temperature of the second refrigeration terminal is less than the seventh temperature threshold, or the second difference is less than or equal to the eighth temperature threshold, control the second refrigeration terminal to stop cooling the indoor environment.

[0023] This technical solution takes the dew point temperature of the current indoor environment, the temperature of the second refrigeration terminal, and the difference between the temperature of the second refrigeration terminal and the dew point temperature of the current indoor environment as the judgment targets to better control the operation of the first refrigeration terminal and / or the second refrigeration terminal.

[0024] In some embodiments, the controller is provided with a humidity set value, a first humidity threshold, and a second humidity threshold;

[0025] The controller is further configured to: obtain the difference between the indoor environment humidity and the humidity set value as the third difference;

[0026] When the third difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier to humidify the indoor environment;

[0027] When the third difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier to dehumidify the indoor environment.

[0028] In some embodiments, the humidity set value is relative humidity, and the controller is further configured to: calculate the target moisture content of the current indoor environment according to the humidity set value and the temperature set value;

[0029] Calculate the actual moisture content of the current indoor environment according to the indoor environment temperature and the relative humidity detected by the humidity sensor.

[0030] In some embodiments, the controller is further configured to: obtain the difference between the target moisture content of the current indoor environment and the actual moisture content of the current indoor environment as the fourth difference;

[0031] When the fourth difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier to humidify the indoor environment;

[0032] When the fourth difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier to dehumidify the indoor environment.

[0033] In some embodiments, the controller is further configured to: when the first difference is less than the sixth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and calculate the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value.

[0034] In some embodiments, the controller is further configured to: when the first difference is greater than or equal to the sixth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and calculate the target moisture content of the current indoor environment according to the temperature set value and the humidity set value.

[0035] In some embodiments, a third humidity threshold is preset in the controller;

[0036] The controller is further configured to: when the fourth difference is greater than or equal to the third humidity threshold, control the fresh air dehumidifier to stop humidifying the indoor environment.

[0037] In some embodiments, a fourth humidity threshold is preset in the controller;

[0038] The controller is further configured to: when the fourth difference is less than or equal to the fourth humidity threshold, control the fresh air dehumidifier to stop dehumidifying the indoor environment.

[0039] In some embodiments, a ninth temperature threshold and a tenth temperature threshold are preset in the controller; the controller is further configured to:

[0040] When the first difference is less than the ninth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, calculate the target moisture content of the current indoor environment according to the temperature set value and the humidity set value, and control the heating terminal to heat the indoor environment;

[0041] When the second difference is greater than the tenth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, calculate the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value, and control the heating terminal to stop heating the indoor environment.

[0042] In addition, the present application also provides an air conditioning system, including an indoor unit, and the indoor unit includes:

[0043] A heating terminal that heats the indoor environment by means of radiant heat transfer;

[0044] A first cooling terminal that cools the indoor environment by means of convective heat transfer;

[0045] A second cooling terminal that cools the indoor environment by means of radiant heat transfer;

[0046] A first temperature sensor for detecting the indoor environment temperature;

[0047] A second temperature sensor for detecting the temperature of the second cooling terminal;

[0048] A controller, and the controller is preset with a temperature set value, a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold, a sixth temperature threshold, a seventh temperature threshold and an eighth temperature threshold;

[0049] The controller is configured to:

[0050] Obtain the difference between the indoor environment temperature and the temperature set value as the first difference;

[0051] Obtain the dew point temperature of the current indoor environment, and obtain the difference between the temperature of the second cooling terminal and the dew point temperature of the current indoor environment as the second difference;

[0052] When the first difference is greater than the first temperature threshold, control the first cooling terminal to cool the indoor environment;

[0053] When the first difference is less than or equal to the second temperature threshold, control the first cooling terminal to stop cooling the indoor environment;

[0054] When the first difference is greater than the third temperature threshold, the temperature of the second refrigeration terminal is greater than the fourth temperature threshold, and the second difference is greater than the fifth temperature threshold, control the second refrigeration terminal to refrigerate the indoor environment;

[0055] When the first difference is less than the sixth temperature threshold, or the temperature of the second refrigeration terminal is less than the seventh temperature threshold, or the second difference is less than or equal to the eighth temperature threshold, control the second refrigeration terminal to stop refrigerating the indoor environment.

[0056] Based on the above technical solution, in the embodiment of the present invention, the air conditioning system dehumidifies and humidifies the indoor environment by setting a fresh air dehumidifier and humidifier, and uses the dew point temperature of the current indoor environment, the temperature of the second refrigeration terminal, and the difference between the temperature of the second refrigeration terminal and the dew point temperature of the current indoor environment as the judgment target to better control the operation of the first refrigeration terminal and / or the second refrigeration terminal. Description of the Drawings

[0057] Figure 1 is a schematic structural diagram of an embodiment of the air conditioning system of the present invention;

[0058] Figure 2 is a schematic structural diagram of the connection between the outdoor unit and the refrigeration terminal and the heating terminal in an embodiment of the air conditioning system of the present invention;

[0059] Figure 3 is a schematic structural diagram of an embodiment of the air conditioning system of the present invention in the refrigeration mode;

[0060] Figure 4 is a flow path diagram of the refrigerant in an embodiment of the air conditioning system of the present invention in the refrigeration mode;

[0061] Figure 5 is a schematic structural diagram of an embodiment of the air conditioning system of the present invention in the heating mode;

[0062] Figure 6 is a flow path diagram of the refrigerant in an embodiment of the air conditioning system of the present invention in the heating mode;

[0063] Figure 7 is a schematic structural diagram of the fresh air dehumidifier and humidifier in an embodiment of the air conditioning system of the present invention;

[0064] Figure 8 is a schematic structural diagram of the first refrigeration terminal being a floor-standing unit in an embodiment of the air conditioning system of the present invention;

[0065] Figure 9 is a schematic structural diagram of the first refrigeration terminal being a wall-mounted unit in an embodiment of the air conditioning system of the present invention;

[0066] Figure 10 is a schematic structural diagram of the first refrigeration terminal being a duct unit in an embodiment of the air conditioning system of the present invention.

[0067] In the figure,

[0068] 1. Outdoor unit; 2. Refrigeration terminal; 3. Heating terminal; 4. Fresh air dehumidification and humidification machine; 5. Refrigeration main valve; 7. Equipment room; 8. Controller;

[0069] 11. Outdoor heat exchanger; 12. Heat exchange compressor; 13. Four-way valve; 14. Refrigeration expansion valve; 15. Heating expansion valve; 16. Fan; 17. Fourth pipeline; 18. First pipeline; 19. Fifth pipeline; 110. Third pipeline; 111. Second pipeline;

[0070] 131. First end; 132. Second end; 133. Third end; 134. Fourth end;

[0071] 171. Second branch; 172. First branch;

[0072] 21. First refrigeration terminal; 22. Second refrigeration terminal;

[0073] 41. Air outlet; 42. Fresh air fan; 43. Dehumidification compressor; 44. Cooling unit; 45. Condensation unit; 46. Humidification unit; 47. Fresh air inlet; 48. Return air outlet;

[0074] 51. Refrigeration branch expansion valve. Detailed implementation manners

[0075] To make the objectives and implementation manners of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application with reference to the accompanying drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0076] It should be noted that the brief description of the terms in this application is only for facilitating the understanding of the following described implementation manners, rather than intending to limit the implementation manners of this application. Unless otherwise specified, these terms should be understood according to their ordinary and common meanings.

[0077] The terms "first", "second", "third", etc. in the specification, claims and the above-mentioned drawings of this application are used to distinguish similar or same-kind objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0078] The terms "include" and "have" and any of their variations are intended to cover but not exclusively include. For example, a product or device including a series of components does not necessarily have to be limited to all the clearly listed components, but may include other components that are not clearly listed or are inherent to these products or devices.

[0079] As Figures 1 - 7 shown, in a schematic embodiment of the air conditioning system of the present invention, the air conditioning system includes an indoor unit and an outdoor unit 1. The outdoor unit 1 is connected to the indoor unit through a pipeline. The outdoor unit 1 is used to provide a cold source or a heat source. The indoor unit includes a refrigeration end 2 and a heating end 3. Among them, the refrigeration end 2 uses the cold source provided by the outdoor unit 1 to cool the indoor environment, and the heating end 3 uses the heat source provided by the outdoor unit 1 to heat the indoor environment. A refrigerant flows in the pipeline, and the refrigerant circulates between the outdoor unit 1 and the indoor unit, and uses the characteristics of heat absorption and release when the refrigerant changes between gas phase and liquid phase to achieve cooling or heating of the indoor environment.

[0080] When the indoor environment needs to be cooled, the above air conditioning system is in the cooling mode. The liquid-phase refrigerant flows into the indoor unit, absorbs the heat of the indoor air, and turns into a gas phase and flows back to the outdoor unit 1, exchanges heat with the outdoor air, releases heat and turns back into a liquid phase, and then enters the indoor unit for cycle cooling. When the indoor environment needs to be heated, the above air conditioning system is in the heating mode. The gas-phase refrigerant enters the indoor unit, releases heat, and turns into a liquid phase and flows back to the outdoor unit 1, absorbs the heat of the outdoor air and turns into a gas phase, and then enters the indoor unit for cycle heating.

[0081] It should be noted that not all of the gas-phase refrigerant can turn into a liquid phase when releasing heat. Similarly, not all of the liquid-phase refrigerant can turn into a gas phase when absorbing heat. This belongs to the well-known common sense technology in this field and will not be elaborated here.

[0082] As Figures 2 - 6 shown, the outdoor unit 1 includes an outdoor heat exchanger 11 and a heat exchange compressor 12. The outdoor heat exchanger 11 is used to perform heat exchange between the refrigerant flowing in the heat transfer tubes of the outdoor heat exchanger 11 and the outdoor air. One end of the outdoor heat exchanger 11 is connected to the heat exchange compressor 12, and the other end of the outdoor heat exchanger 11 is connected to the indoor unit. The heat exchange compressor 12 is located between the outdoor heat exchanger 11 and the indoor unit and is used to provide power for the refrigerant to circulate between the outdoor unit 1 and the indoor unit. The outdoor heat exchanger 11 operates as a condenser in the cooling mode of the air conditioning system, so that the refrigerant compressed by the heat exchange compressor 12 dissipates heat to the outdoor air through the outdoor heat exchanger 11 and condenses. The outdoor heat exchanger 11 operates as an evaporator in the heating mode of the air conditioning system, so that the depressurized refrigerant absorbs the heat of the outdoor air through the outdoor heat exchanger 11 and evaporates.

[0083] The indoor unit includes a refrigeration end 2 and a heating end 3. The refrigeration end 2 and the heating end 3 are arranged in parallel with each other. When the indoor environment needs refrigeration, the refrigerant needs to flow into the refrigeration end 2. When the indoor environment needs heating, the refrigerant needs to flow into the heating end 3. Therefore, in order to facilitate the connection between the outdoor heat exchanger 11 and the refrigeration end 2 and the heating end 3, the outdoor heat exchanger 11 is connected to the refrigeration end 2 through a second branch 171, and the outdoor heat exchanger 11 is connected to the heating end 3 through a first branch 172.

[0084] It should be noted that although the connection of the outdoor heat exchanger 11 to the refrigeration end 2 and the heating end 3 through the second branch 171 and the first branch 172 facilitates the flow of the refrigerant, it is not conducive to the pipeline layout. Therefore, the outdoor heat exchanger 11 is connected to a fourth pipeline 17, and the fourth pipeline 17 is simultaneously connected to the second branch 171 and the first branch 172. The fourth pipeline 17 is arranged outdoors to simplify the pipelines inside the outdoor unit 1.

[0085] It should also be noted that since the refrigerant flow paths are different when the air-conditioning system is in refrigeration and heating modes, in order to enable the refrigerant to better refrigerate and heat the indoor environment, a four-way valve 13 is provided between the outdoor heat exchanger 11 and the heat exchange compressor 12. By setting the four-way valve 13, the flow direction of the refrigerant in the system pipeline can be changed, so as to realize the mutual conversion between the refrigeration mode and the heating mode of the air-conditioning system.

[0086] In some embodiments, the outdoor heat exchanger 11 further includes heat exchange fins to increase the contact area between the outdoor air and the refrigerant flowing in the outdoor heat exchanger 11, thereby improving the heat exchange efficiency between the outdoor air and the refrigerant.

[0087] Specifically, as Figure 4 shown, the four-way valve 13 has four ports, namely a first end 131, a second end 132, a third end 133, and a fourth end 134. Among them, the refrigeration end 2 is connected to the first end 131 through a third pipeline 110, the outlet of the compressor is connected to the second end 132 through a fifth pipeline 19, the third end 133 is connected to the outdoor heat exchanger 11 through a first pipeline 18, and the fourth end 134 is connected to the inlet of the compressor; it should be noted that the first end 131, the second end 132, the third end 133, and the fourth end 134 can be connected or disconnected as needed to change the flow direction of the refrigerant in the system pipeline.

[0088] An expansion valve is also provided in the connecting pipelines between the outdoor heat exchanger 11 and the refrigeration terminal 2 and the heating terminal 3, so as to expand the liquid refrigerant in the high-temperature and high-pressure state into a low-pressure liquid refrigerant, and return the refrigerant gas in the low-temperature and low-pressure state to the heat exchange compressor 12. Since the outdoor heat exchanger 11 is correspondingly connected to the refrigeration terminal 2 and the heating terminal 3 through the second branch 171 and the first branch 172, a refrigeration expansion valve 14 is provided in the second branch 171, and a heating expansion valve 15 is provided in the first branch 172.

[0089] When the above air-conditioning system is in the refrigeration mode, the outdoor heat exchanger 11 serves as an evaporator, and the refrigeration terminal 2 serves as a condenser. The second end 132 is communicated with the third end 133, and the first end 131 is communicated with the fourth end 134. The gaseous refrigerant enters the third end 133 from the second end 132 through the fifth pipeline 19 by the heat exchange compressor 12, then enters the outdoor heat exchanger 11 through the first pipeline 18 for heat exchange treatment, and then enters the fourth pipeline 17 and the second branch 171 in sequence, and passes through the refrigeration expansion valve 14 to enter the refrigeration terminal 2 to refrigerate the indoor environment, and then passes through the third pipeline 110 and enters the heat exchange compressor 12 through the first end 131 and the fourth end 134 in sequence.

[0090] When the above air-conditioning system is in the heating mode, the outdoor heat exchanger 11 serves as a condenser, and the heating terminal 3 serves as an evaporator. The second end 132 is communicated with the first end 131, and the third end 133 is communicated with the fourth end 134. The gaseous refrigerant enters the first end 131 from the second end 132 through the fifth pipeline 19 by the heat exchange compressor 12 and enters the heating terminal 3 through the second pipeline 111 to heat the indoor environment, and then passes through the heating expansion valve 15 and enters the outdoor heat exchanger 11 through the first branch 172 and the first pipeline 18 in sequence for heat exchange treatment with the outside air, and then passes through the first pipeline 18 and enters the heat exchange compressor 12 through the third end 133 and the fourth end 134 in sequence.

[0091] In some embodiments, as Figures 3 - 6 shown, the outdoor unit 1 further includes a fan 16. The fan 16 is arranged close to the outdoor heat exchanger 11, so that indoor air enters the interior of the outdoor unit 1 from the air outlet 41 of the housing of the outdoor unit 1, and after passing through the heat exchange treatment of the outdoor heat exchanger 11, it flows out of the outdoor unit 1 from the air outlet 41 of the housing of the outdoor unit 1, so that the outdoor air exchanges heat with the refrigerant in the outdoor heat exchanger 11.

[0092] In the above air-conditioning system, as Figure 1 shown, the refrigeration terminal 2 includes a first refrigeration terminal 21 and a second refrigeration terminal 22. The first refrigeration terminal 21 transfers the cold source of the outdoor unit 1 to the indoor by convection using air; the second refrigeration terminal 22 transfers the cold quantity indoors by means of radiant heat exchange.

[0093] In practical applications, asFigures 8 - 10 As shown, the convective heat transfer refrigeration terminal 2 is usually an air conditioner such as a floor-standing unit, a wall-mounted unit, a ducted unit or a ceiling-mounted unit; the second refrigeration terminal 22 is a multi-parallel capillary tube, and the capillary tube is laid on the indoor ceiling or can also be laid on the wall; it should be noted that the first refrigeration terminal 21 and the second refrigeration terminal 22 are independent of each other and can work simultaneously or separately.

[0094] In the above air conditioning system, the heating terminal 3 is a radiant heating terminal 3, which transfers heat indoors by means of radiant heat transfer; the radiant heating terminal 3 is also a multi-parallel capillary tube, and the capillary tube is laid on the indoor floor.

[0095] The above air conditioning system cools the indoor environment by setting the first refrigeration terminal 21 and using the convective heat transfer between the first refrigeration terminal 21 and the indoor air; by setting the second refrigeration terminal 22, the indoor environment is cooled by using the radiant heat transfer between the second refrigeration terminal 22 and the indoor air, and the way of radiant heat transfer can avoid the generation of wind feeling indoors, avoid the direct blowing of wind on users, and can also avoid the indoor noise generated by the operation of the fan; by setting the first refrigeration terminal 21 and the second refrigeration terminal 22 to work independently, the air conditioning system can select the first refrigeration terminal 21 for refrigeration, the second refrigeration terminal 22 for refrigeration, or the first refrigeration terminal 21 and the second refrigeration terminal 22 for simultaneous refrigeration according to user needs, so as to meet the diverse needs of users; by setting the heating terminal 3, the indoor environment is heated by using the radiant heat transfer between the heating terminal 3 and the indoor air. This air conditioning system can cool or heat the indoor environment by means of radiant heat transfer, reduce the noise generated during operation, and avoid the generation of wind feeling, enhancing the user experience.

[0096] It should be noted that when the indoor environment temperature drops, condensed water is likely to appear in the air. Since the first refrigeration terminal 21 cools the indoor environment by convective heat transfer and the second refrigeration terminal 22 cools the indoor environment by radiant heat transfer, the condensed water generated by the first refrigeration terminal 21 when cooling the indoor environment is less than that generated by the second refrigeration terminal 22.

[0097] As Figure 4 shown, the indoor unit also includes a refrigeration main valve 5. The refrigeration main valve 5 is connected to the second branch 171 and is connected to the four-way valve 13 through the third pipeline 110. The indoor refrigeration terminals 2 are arranged in parallel with each other and are respectively connected to the refrigeration main valve 5 to distribute the cooling capacity through the refrigeration main valve 5; it should be noted that the refrigeration main valve 5 is correspondingly connected to the first refrigeration terminal 21 and the second refrigeration terminal 22 through a number of refrigeration pipelines, and refrigeration branch expansion valves 51 are respectively provided in the refrigeration pipelines connecting the refrigeration main valve 5 and the refrigeration terminals 2.

[0098] In the above air conditioning system, as Figure 1 and Figure 7As shown in the figure, it further includes a fresh air dehumidifier and humidifier 4, which is arranged in the equipment room 7. The fresh air dehumidifier and humidifier 4 includes a fresh air duct, and the fresh air duct has a fresh air inlet 47, an air outlet 41 and a return air outlet 48. The fresh air inlet 47 is communicated with the outdoor environment, the air outlet 41 is arranged indoors, and the return air outlet 48 is arranged outdoors for recycling indoor air.

[0099] The fresh air dehumidifier and humidifier 4 includes a fresh air fan 42, which is arranged in the fresh air duct. By the operation of the fresh air fan 42, outdoor air is introduced into the fresh air duct from the fresh air inlet 47 and flows to the indoor through the air outlet 41; a filtering unit, a humidifying unit 46, a cooling unit 44 and a condensing unit 45 are also arranged in the fresh air duct. The filtering unit is arranged close to the fresh air inlet 47 for filtering outdoor fresh air to prevent large particles or dust and other substances in the outdoor fresh air from entering the indoor; the humidifying unit 46 is used to increase the humidity of the outdoor fresh air, thereby increasing the indoor environmental humidity; the cooling unit 44 is used to reduce the temperature of the outdoor fresh air to avoid the temperature of the introduced outdoor fresh air being higher than the indoor air, resulting in an increase in the indoor environmental temperature; the condensing unit 45 is used to reduce the humidity of the outdoor fresh air.

[0100] It should be noted that the fresh air dehumidifier and humidifier 4 further includes a dehumidification compressor 43, and the dehumidification compressor 43 cooperates with the condensing unit 45 to reduce the humidity in the outdoor fresh air.

[0101] The filtering unit, the humidifying unit 46, the cooling unit 44 and the condensing unit 45 are independently arranged and can work simultaneously or separately; the filtering unit, the humidifying unit 46, the cooling unit 44 and the condensing unit 45 are respectively prior arts and will not be elaborated here.

[0102] In some embodiments, a fresh air valve is arranged at the fresh air inlet 47. When it is necessary to introduce outdoor fresh air, the fresh air valve is opened; when it is not necessary to introduce outdoor fresh air, the fresh air valve is closed.

[0103] In the above air conditioning system, it further includes a controller 8, and the controller 8 is connected to the four-way valve 13 to control the connection and disconnection between the first end 131, the second end 132, the third end 133 and the fourth end 134 of the four-way valve 13, so as to control the flow direction of the refrigerant in the four-way valve 13, and further realize the refrigeration or heating of the air conditioning system.

[0104] The controller 8 is also connected to the heat exchange compressor 12 to control the operation of the heat exchange compressor 12; when the air conditioning system is in the refrigeration mode, the controller 8 controls the outdoor unit 1 to provide a cold source, and the outdoor unit 1 delivers the cold quantity to the first refrigeration terminal 21 and the second refrigeration terminal 22 respectively, and they then deliver the cold quantity to the room by convection heat transfer and radiation heat transfer respectively; when the air conditioning system is in the heating mode, the controller 8 controls the outdoor unit 1 to provide a heat source, and the outdoor unit 1 delivers the heat to the heating radiation terminal to deliver the heat to each room in the form of radiation heat transfer.

[0105] The controller 8 is also connected to the fresh air dehumidifier and humidifier 4, and is used to control the fresh air dehumidifier and humidifier 4 to dehumidify or humidify the indoor environment. The controller 8 is also connected to the fresh air fan 42, the filtration unit, the humidification unit 46, the cooling unit 44, and the condensation unit 45 to introduce outdoor fresh air, filter the outdoor fresh air, increase the humidity of the incoming outdoor fresh air, cool the outdoor fresh air, and reduce the humidity of the outdoor fresh air.

[0106] When the indoor environment needs to be dehumidified, the controller 8 controls the condensation unit 45 to operate to reduce the humidity of the indoor air; when the indoor environment needs to be humidified, the controller 8 controls the humidification unit 46 to operate to increase the humidity of the indoor air; when fresh air needs to be introduced into the room, the controller 8 controls the fresh air fan 42 to operate to introduce outdoor fresh air into the room.

[0107] To facilitate better adjustment of the indoor environment humidity, etc., a humidity sensor is also provided indoors. The humidity sensor is used to detect the humidity of the indoor environment. The humidity sensor is connected to the controller 8, and the controller 8 controls the operation of the humidification unit 46 or the condensation unit 45 according to the detection information of the humidity sensor to humidify or dehumidify the indoor environment.

[0108] A first temperature sensor is provided indoors, and the first temperature sensor is used to detect the indoor environment temperature.

[0109] A second temperature sensor is also provided indoors, and the second temperature sensor is used to detect the temperature of the second refrigeration terminal 22. The second temperature sensor is arranged at the lowest point of the top surface temperature, approximately in the first half of the second refrigeration terminal 22.

[0110] A third temperature sensor is also provided indoors, and the humidity sensor and the third temperature sensor cooperate with each other to detect the moisture content of the indoor environment.

[0111] The controller 8 presets a temperature set value, a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold, a sixth temperature threshold, a seventh temperature threshold, and an eighth temperature threshold; the controller 8 is configured to: obtain the difference between the indoor ambient temperature and the temperature set value as a first difference; obtain the dew point temperature of the current indoor environment, and obtain the difference between the temperature of the second refrigeration terminal 22 and the dew point temperature of the current indoor environment as a second difference; when the first difference is greater than the first temperature threshold, control the first refrigeration terminal 21 to refrigerate the indoor environment; when the first difference is less than or equal to the second temperature threshold, control the first refrigeration terminal 21 to stop refrigerating the indoor environment; when the first difference is greater than the third temperature threshold and the temperature of the second refrigeration terminal 22 is greater than the fourth temperature threshold, and the second difference is greater than the fifth temperature threshold, control the second refrigeration terminal 22 to refrigerate the indoor environment; when the first difference is less than the sixth temperature threshold, or the temperature of the second refrigeration terminal 22 is less than the seventh temperature threshold, or the second difference is less than or equal to the eighth temperature threshold, control the second refrigeration terminal 22 to stop refrigerating the indoor environment.

[0112] By taking the dew point temperature of the current indoor environment, the temperature of the second refrigeration terminal 22, and the difference between the temperature of the second refrigeration terminal 22 and the dew point temperature of the current indoor environment as the judgment targets, the operation of the first refrigeration terminal 21 and / or the second refrigeration terminal 22 can be better controlled.

[0113] In some embodiments, the controller 8 is provided with a humidity set value, a first humidity threshold, and a second humidity threshold; the controller 8 is further configured to: obtain the difference between the indoor ambient humidity and the humidity set value as a third difference; when the third difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier and humidifier 4 to humidify the indoor environment; when the third difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier and humidifier 4 to dehumidify the indoor environment.

[0114] In some embodiments, the humidity set value is the relative humidity, and the controller 8 is further configured to: calculate the target moisture content of the current indoor environment according to the humidity set value and the temperature set value; calculate the actual moisture content of the current indoor environment according to the indoor ambient temperature and the relative humidity detected by the humidity sensor.

[0115] In some embodiments, the controller 8 is further configured to: obtain the difference between the target moisture content and the actual moisture content of the current indoor environment as a fourth difference; when the fourth difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier and humidifier 4 to humidify the indoor environment; when the fourth difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier and humidifier 4 to dehumidify the indoor environment.

[0116] In some embodiments, the controller 8 is further configured to: when the first difference is less than the sixth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and calculate the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value.

[0117] In some embodiments, the controller 8 is further configured to: when the first difference is greater than or equal to the sixth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and calculate the target moisture content of the current indoor environment according to the temperature set value and the humidity set value.

[0118] It should be noted that when the air conditioning system cools or heats the indoor environment, since the indoor environment temperature is constantly changing and the indoor environment temperature tends to change towards the temperature set value, in order to enable the fresh air dehumidifier 4 to work better, therefore, the controller 8 calculates the target moisture content of the current indoor environment according to the temperature set value and the humidity set value.

[0119] In some embodiments, a third humidity threshold is preset in the controller 8; the controller 8 is further configured to: when the fourth difference is greater than or equal to the third humidity threshold, control the fresh air dehumidifier 4 to stop humidifying the indoor environment.

[0120] In some embodiments, a fourth humidity threshold is preset in the controller 8; the controller 8 is further configured to: when the fourth difference is less than or equal to the fourth humidity threshold, control the fresh air dehumidifier 4 to stop dehumidifying the indoor environment.

[0121] In some embodiments, a ninth temperature threshold and a tenth temperature threshold are preset in the controller 8; the controller 8 is further configured to: when the first difference is less than the ninth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, calculate the target moisture content of the current indoor environment according to the temperature set value and the humidity set value, and control the heating terminal 3 to heat the indoor environment; when the second difference is greater than the tenth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, calculate the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value, and control the heating terminal 3 to stop heating the indoor environment.

[0122] Among them, the relative humidity, indoor environment temperature and moisture content satisfy the relationship:

[0123]

[0124]

[0125] Among them, is the moisture content of the current indoor environment, and P s is the partial pressure of water vapor in the air; is the indoor relative humidity; B is the local atmospheric pressure; t 0 is the indoor environmental temperature; a 0 ~a 3 are undetermined coefficients.

[0126] It should be noted that when calculating the dew point temperature of the indoor environmental temperature, first calculate the partial pressure of water vapor, and then the dew point temperature can be obtained by referring to the water vapor partial pressure table. The formula for calculating the partial pressure of water vapor is:

[0127]

[0128] It also should be noted that the water vapor partial pressure table is common knowledge in this field and will not be elaborated here.

[0129] In addition, it should be noted that the first humidity threshold, the second humidity threshold, the third humidity threshold, and the fourth humidity threshold change with the indoor environmental temperature. The values of the first humidity threshold, the second humidity threshold, the third humidity threshold, and the fourth humidity threshold are different at different indoor environmental temperatures. However, the first humidity threshold, the second humidity threshold, the third humidity threshold, and the fourth humidity threshold are all obtained by conversion based on the relational formula of relative humidity, indoor environmental temperature, and moisture content.

[0130] The working principle of the above air conditioning system will be introduced in detail with specific examples below.

[0131] Start the air conditioning system and determine the air conditioning operation mode. If the air conditioning system is required to cool the indoor environment, select the cooling mode. If the air conditioning system is required to heat the indoor environment, select the heating mode.

[0132] When the air conditioning system selects the cooling mode, the controller 8 controls the first cooling terminal 21 and / or the second cooling terminal 22 to work according to the temperature set value preset inside the controller 8 and the actual temperature of the indoor environment; the controller 8 controls the fresh air dehumidifier 4 to work according to the humidity set value preset inside the controller 8 and the actual humidity of the indoor environment.

[0133] Specifically: Obtain the difference between the indoor environmental temperature and the temperature set value as the first difference; obtain the dew point temperature of the current indoor environment, and obtain the difference between the temperature of the second cooling terminal 22 and the dew point temperature of the current indoor environment as the second difference; when the first difference is greater than the first temperature threshold, the controller 8 controls the first cooling terminal 21 to cool the indoor environment; when the first difference is less than or equal to the second temperature threshold, the controller 8 controls the first cooling terminal 21 to stop cooling the indoor environment; when the first difference is greater than the third temperature threshold, the temperature of the second cooling terminal 22 is greater than the fourth temperature threshold, and the second difference is greater than the fifth temperature threshold, the controller 8 controls the second cooling terminal 22 to cool the indoor environment; when the first difference is less than the sixth temperature threshold, or the temperature of the second cooling terminal 22 is less than the seventh temperature threshold, or the second difference is less than or equal to the eighth temperature threshold, the controller 8 controls the second cooling terminal 22 to stop cooling the indoor environment.

[0134] Since the humidity set value is relative humidity, therefore, the controller 8 calculates the target moisture content of the current indoor environment according to the humidity set value and the temperature set value; calculates the actual moisture content of the current indoor environment according to the indoor environmental temperature and the relative humidity detected by the humidity sensor. Obtain the difference between the target moisture content and the actual moisture content of the current indoor environment as the fourth difference; when the fourth difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier 4 to humidify the indoor environment; a third humidity threshold is preset in the controller 8; when the fourth difference is greater than or equal to the third humidity threshold, the controller 8 controls the fresh air dehumidifier 4 to stop humidifying the indoor environment; when the fourth difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier 4 to dehumidify the indoor environment; a fourth humidity threshold is also preset in the controller 8; when the fourth difference is less than or equal to the fourth humidity threshold, the controller 8 controls the fresh air dehumidifier 4 to stop dehumidifying the indoor environment.

[0135] It should be noted that when the first difference is less than the sixth temperature threshold, the controller 8 calculates the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor; the controller 8 calculates the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value; when the first difference is greater than or equal to the sixth temperature threshold, the controller 8 calculates the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor; the controller 8 calculates the target moisture content of the current indoor environment according to the temperature set value and the humidity set value.

[0136] When the air conditioning system selects the heating mode, the controller 8 controls the operation of the heating terminal 3 according to the temperature set value preset inside the controller 8 and the actual temperature of the indoor environment; the controller 8 controls the operation of the fresh air dehumidifier and humidifier 4 according to the humidity set value preset inside the controller 8 and the actual humidity of the indoor environment.

[0137] Specifically, obtain the difference between the indoor environment temperature and the temperature set value as the first difference; the controller 8 presets a ninth temperature threshold and a tenth temperature threshold; when the first difference is less than the ninth temperature threshold, the controller 8 controls the heating terminal 3 to heat the indoor environment; when the second difference is greater than the tenth temperature threshold, the controller 8 controls the heating terminal 3 to stop heating the indoor environment.

[0138] Since the humidity set value is the relative humidity, therefore, the controller 8 calculates the target moisture content of the current indoor environment according to the humidity set value and the temperature set value; calculates the actual moisture content of the current indoor environment according to the indoor environment temperature and the relative humidity detected by the humidity sensor. Obtain the difference between the target moisture content of the current indoor environment and the actual moisture content of the current indoor environment as the fourth difference; when the fourth difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier and humidifier 4 to humidify the indoor environment; the controller 8 presets a third humidity threshold inside; when the fourth difference is greater than or equal to the third humidity threshold, the controller 8 controls the fresh air dehumidifier and humidifier 4 to stop humidifying the indoor environment; when the fourth difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier and humidifier 4 to dehumidify the indoor environment; the controller 8 also presets a fourth humidity threshold inside; when the fourth difference is less than or equal to the fourth humidity threshold, the controller 8 controls the fresh air dehumidifier and humidifier 4 to stop dehumidifying the indoor environment.

[0139] It should be noted that when the first difference is less than the ninth temperature threshold, the controller 8 calculates the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and the controller 8 calculates the target moisture content of the current indoor environment according to the temperature set value and the humidity set value; when the second difference is greater than the tenth temperature threshold, the controller 8 calculates the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and the controller 8 calculates the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value.

[0140] The above air conditioning system realizes the interlocking control of refrigeration, heating and dehumidification and humidification by setting the fresh air dehumidifier and humidifier 4 to dehumidify and humidify the indoor environment; and takes the dew point temperature of the current indoor environment, the temperature of the second refrigeration terminal 22 and the difference between the dew point temperature of the current indoor environment as the judgment target to better control the operation of the first refrigeration terminal 21 and / or the second refrigeration terminal 22.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

[0142] For the sake of explanation, the above description has been presented in connection with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Many modifications and variations are possible in light of the above teachings. The selection and description of the embodiments were chosen to best explain the principles and practical applications, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments suited to particular uses contemplated.

Claims

1. An air conditioning system, including an indoor unit, characterized in that, the indoor unit includes: A heating terminal that heats the indoor environment by means of radiative heat transfer; A first cooling terminal that cools the indoor environment by means of convective heat transfer; A second cooling terminal that cools the indoor environment by means of radiative heat transfer; A fresh air dehumidifier and humidifier for humidifying or dehumidifying the indoor environment; A first temperature sensor for detecting the indoor environment temperature; A second temperature sensor for detecting the temperature of the second cooling terminal; A third temperature sensor; A humidity sensor, the humidity sensor cooperating with the third temperature sensor to detect the moisture content of the indoor environment; A controller, the controller presetting a temperature set value, a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold, a sixth temperature threshold, a seventh temperature threshold and an eighth temperature threshold; The controller is configured to: Obtain the difference between the indoor environment temperature and the temperature set value as a first difference; Obtain the dew point temperature of the current indoor environment, and obtain the difference between the temperature of the second cooling terminal and the dew point temperature of the current indoor environment as a second difference; When the first difference is greater than the first temperature threshold, control the first cooling terminal to cool the indoor environment; When the first difference is less than or equal to the second temperature threshold, control the first cooling terminal to stop cooling the indoor environment; When the first difference is greater than the third temperature threshold and the temperature of the second cooling terminal is greater than the fourth temperature threshold, and the second difference is greater than the fifth temperature threshold, control the second cooling terminal to cool the indoor environment; When the first difference is less than the sixth temperature threshold, or the temperature of the second cooling terminal is less than the seventh temperature threshold, or the second difference is less than or equal to the eighth temperature threshold, control the second cooling terminal to stop cooling the indoor environment.

2. The air conditioning system according to claim 1, characterized in that, The controller is provided with a humidity set value, a first humidity threshold and a second humidity threshold; The controller is further configured to: Obtain the difference between the indoor environment humidity and the humidity set value as a third difference; When the third difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier and humidifier to humidify the indoor environment; When the third difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier and humidifier to dehumidify the indoor environment.

3. The air conditioning system according to claim 2, characterized in that, The humidity set value is relative humidity, and the controller is further configured to: Calculate the target moisture content of the current indoor environment according to the humidity set value and the temperature set value; Calculate the actual moisture content of the current indoor environment according to the indoor environment temperature and the relative humidity detected by the humidity sensor.

4. The air conditioning system according to claim 3, characterized in that, The controller is further configured to: Obtain the difference between the target moisture content of the current indoor environment and the actual moisture content of the current indoor environment as a fourth difference; When the fourth difference is less than or equal to the first humidity threshold, control the fresh air dehumidifier and humidifier to humidify the indoor environment; When the fourth difference is greater than or equal to the second humidity threshold, control the fresh air dehumidifier and humidifier to dehumidify the indoor environment.

5. The air conditioning system according to claim 4, wherein, the controller is further configured to: when the first difference is less than the sixth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and calculate the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value.

6. The air conditioning system according to claim 4, wherein, the controller is further configured to: when the first difference is greater than or equal to the sixth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, and calculate the target moisture content of the current indoor environment according to the temperature set value and the humidity set value.

7. The air conditioning system according to claim 4, wherein, a third humidity threshold is preset in the controller; the controller is further configured to: when the fourth difference is greater than or equal to the third humidity threshold, control the fresh air dehumidifier and humidifier to stop humidifying the indoor environment.

8. The air conditioning system according to claim 4, wherein, a fourth humidity threshold is preset in the controller; the controller is further configured to: when the fourth difference is less than or equal to the fourth humidity threshold, control the fresh air dehumidifier and humidifier to stop dehumidifying the indoor environment.

9. The air conditioning system according to claim 4, wherein, a ninth temperature threshold and a tenth temperature threshold are preset in the controller; the controller is further configured to: when the first difference is less than the ninth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, calculate the target moisture content of the current indoor environment according to the temperature set value and the humidity set value, and control the heating terminal to heat the indoor environment; when the second difference is greater than the tenth temperature threshold, calculate the actual moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the relative humidity detected by the humidity sensor, calculate the target moisture content of the current indoor environment according to the temperature detected by the third temperature sensor and the humidity set value, and control the heating terminal to stop heating the indoor environment.

10. An air conditioning system, including an indoor unit, wherein, the indoor unit includes: a heating terminal that heats the indoor environment by radiant heat exchange; a first cooling terminal that cools the indoor environment by convective heat exchange; a second cooling terminal that cools the indoor environment by radiant heat exchange; a first temperature sensor for detecting the indoor environment temperature; a second temperature sensor for detecting the temperature of the second cooling terminal; A controller, which is preset with a temperature set value, a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold, a sixth temperature threshold, a seventh temperature threshold, and an eighth temperature threshold; The controller is configured to: Obtain the difference between the indoor ambient temperature and the temperature set value as a first difference; Obtain the dew point temperature of the current indoor environment, and obtain the difference between the temperature of the second cooling terminal and the dew point temperature of the current indoor environment as a second difference; When the first difference is greater than the first temperature threshold, control the first cooling terminal to cool the indoor environment; When the first difference is less than or equal to the second temperature threshold, control the first cooling terminal to stop cooling the indoor environment; When the first difference is greater than the third temperature threshold and the temperature of the second cooling terminal is greater than the fourth temperature threshold, and the second difference is greater than the fifth temperature threshold, control the second cooling terminal to cool the indoor environment; When the first difference is less than the sixth temperature threshold, or the temperature of the second cooling terminal is less than the seventh temperature threshold, or the second difference is less than or equal to the eighth temperature threshold, control the second cooling terminal to stop cooling the indoor environment.

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