Air conditioning terminals and air conditioning systems

Abstract

This invention provides an air conditioning terminal and an air conditioning system. An air conditioning terminal includes a housing; a radiating structure disposed on the housing, with the heat exchange surface of the radiating structure facing the outside of the housing; and an air outlet disposed on the housing, located on one side of the radiating structure, with the airflow from the air outlet flowing through the heat exchange surface. The air conditioning terminal and system provided by this invention utilize the airflow from the air outlet flowing through the heat exchange surface to agitate the air in contact with the heat exchange surface, effectively enhancing the heat exchange efficiency of the radiating structure. When the heat exchange capacity of the radiating structure cannot meet the heat exchange requirements or when dehumidification is required, the air outlet is controlled to discharge air towards the heat exchange surface. The low-humidity airflow, after being processed internally by the air conditioning terminal, flows through the heat exchange surface. This airflow can supplement the heat exchange capacity of the radiating structure while simultaneously meeting the dehumidification requirements, and also avoids condensation on the heat exchange surface.

Description

Technical Field

[0001] This invention relates to the field of air handling equipment technology, and in particular to an air conditioning terminal and an air conditioning system. Background Technology

[0002] As people's living standards improve, their demands for indoor environmental comfort are increasing. The functional requirements for indoor air conditioning terminals go beyond simply lowering or raising indoor air temperature. Traditional convection terminals regulate indoor air by blowing cold (or hot) air, resulting in uneven temperature distribution. Areas directly exposed to the airflow may experience excessively low or high temperatures, and the draft can be uncomfortable. Furthermore, because traditional convection air conditioners process air from the entire space, the fan plays a crucial role, inevitably leading to noise problems that disrupt rest and work. Radiant terminals have emerged in recent years due to their high comfort and noise-free operation, but they suffer from drawbacks such as the inability to dehumidify and low cooling capacity per unit area.

[0003] Combining forced convection and radiative heat transfer allows air conditioners to offer the comfort of radiative heat transfer and the efficiency of convective heat transfer; however, this type of combined air conditioning is currently less common. After the system has been running for a period of time, the radiant panel's temperature can become very high or very low due to its inherent thermal inertia, leading to insufficient heating or cooling capacity.

[0004] Existing technology discloses an air conditioner with radiant heating, hot air heating, and cold air cooling modes. This air conditioner connects the radiant heat exchanger of the radiant panel and the indoor heat exchanger in parallel. When switching to hot air heating mode, the heat exchange medium does not flow to the radiant panel's heat exchanger but only to the indoor heat exchanger, thus solving the problem of the radiant heat exchanger's surface temperature not decreasing. However, this air conditioner has limited selectable modes, lacks a radiant cooling mode, and when the indoor temperature drops to the set temperature, it still needs to use the cold air cooling mode to maintain the indoor temperature, resulting in a strong draft and high energy consumption, which is detrimental to improving user comfort and meeting energy conservation and environmental protection requirements. Summary of the Invention

[0005] In order to solve the technical problem of poor comfort in existing air conditioning terminals, an air conditioning terminal and air conditioning system are provided that utilizes airflow from the air outlet to improve the heat exchange efficiency of the radiant structure and thus improve comfort.

[0006] An air conditioning terminal includes:

[0007] case;

[0008] A radiating structure is disposed on the housing, and the heat exchange surface of the radiating structure faces the outside of the housing;

[0009] An air outlet is provided on the housing, the air outlet is located on one side of the radiating structure, and the airflow from the air outlet flows through the heat exchange surface.

[0010] The air outlet includes a first air outlet, which is located above the radiating structure, and the airflow from the first air outlet flows from the upper part of the heat exchange surface to the lower part of the heat exchange surface.

[0011] And / or, the air outlet includes a second air outlet, which is disposed below the radiating structure, and the airflow from the second air outlet flows from the lower part of the heat exchange surface to the upper part of the heat exchange surface.

[0012] The air conditioning terminal also includes a heat exchanger. An airflow channel is provided inside the housing. The heat exchanger is disposed inside the airflow channel. The first air outlet and / or the second air outlet are connected to the airflow channel.

[0013] The heat exchanger has a cooling mode and a heating mode:

[0014] When the heat exchanger is in cooling mode, the second air outlet is connected to the airflow channel;

[0015] When the heat exchanger is in heating mode, the first air outlet is connected to the airflow channel.

[0016] The air conditioning terminal also includes an air outlet structure, which is movably mounted on the housing and has a ventilation state and a retracted state.

[0017] When the air outlet structure is in the ventilation state, the air outlet structure protrudes from the housing to form the first air outlet and / or the second air outlet;

[0018] When the air outlet structure is in the retracted state, the air outlet structure is inside the housing.

[0019] The air outlet structure includes a first air outlet structure, which is disposed above the radiation structure, and when the first air outlet structure is in the ventilation state, a first air outlet is formed on the first air outlet structure.

[0020] And / or, the air outlet structure includes a second air outlet structure, the first air outlet structure is disposed above the radiation structure, and when the second air outlet structure is in the ventilation state, a second air outlet is formed on the first air outlet structure.

[0021] The air conditioning terminal also includes a drive structure, which is disposed on the housing, and the air outlet structure is connected to the drive structure.

[0022] The air conditioning terminal also includes a fan, which is disposed in the airflow channel and is electrically connected to the drive structure.

[0023] The radiant structure includes a radiant plate and a heat exchange tube. The radiant plate is disposed on the shell, and the side of the radiant plate away from the shell forms the heat exchange surface. The heat exchange tube is disposed on the side of the radiant plate facing the interior of the shell.

[0024] A heat insulation structure is provided between the radiation structure and the airflow channel.

[0025] An air conditioning system includes the aforementioned air conditioning terminal.

[0026] The air conditioning terminal and air conditioning system provided by this invention utilize the airflow from the air outlet to flow through the heat exchange surface, thereby disturbing the air in contact with the heat exchange surface and effectively enhancing the heat exchange efficiency of the radiant structure. When the heat exchange capacity of the radiant structure meets the heat exchange requirements, the radiant structure is used preferentially for radiant heat exchange, making full use of the noiseless advantage of the radiant structure to improve the comfort of the air conditioning terminal. When the heat exchange capacity of the radiant structure cannot meet the heat exchange requirements or there is a dehumidification requirement, the air outlet is controlled to discharge air towards the heat exchange surface. The low-humidity airflow, after being processed inside the air conditioning terminal, flows through the heat exchange surface. This airflow can supplement the heat exchange capacity of the radiant structure and meet the dehumidification requirements, while also avoiding the problem of condensation on the heat exchange surface. Moreover, this airflow can disturb the air in contact with the heat exchange surface, overcoming the thermal inertia inherent in the radiant panel itself in the prior art, further improving the heat exchange efficiency of the radiant structure. Furthermore, since the airflow from the air outlet flows through the heat exchange surface, the airflow can be turbulent and slowed down by the heat exchange surface, ensuring that there is no draft in the room, further improving the comfort of the air conditioning terminal. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an air conditioning terminal provided in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A partial schematic diagram of point A;

[0029] Figure 3 An exploded view of an air conditioning terminal provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of airflow when the air conditioning terminal is in cooling mode, provided in an embodiment of the present invention.

[0031] Figure 5 A schematic diagram of airflow when the air conditioning terminal is in heating mode, provided in an embodiment of the present invention;

[0032] Figure 6 A control flowchart for an air conditioning terminal provided in an embodiment of the present invention;

[0033] In the picture:

[0034] 1. Shell; 2. Radiant structure; 21. Heat exchange surface; 31. First air outlet; 32. Second air outlet; 41. First air outlet structure; 42. Second air outlet structure; 51. Rack; 52. Drive gear; 6. Fan; 71. First surface cooler; 72. Second surface cooler; 22. Radiant plate; 23. Heat exchange tube; 8. Insulation structure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Existing air conditioners with radiant heat exchange, hot air heating, and cold air cooling only utilize the radiant structure for heat exchange under low load conditions. Their primary heating and cooling modes still rely on airflow. In other words, they essentially integrate both radiant and heat exchanger structures into a single unit, without any apparent improvement in heat exchange efficiency or comfort resulting from this combination. Therefore, this application provides a... Figures 1 to 6 The air conditioning terminal shown includes: a housing 1; a radiating structure 2, which is disposed on the housing 1, and the heat exchange surface 21 of the radiating structure 2 faces the outside of the housing 1; an air outlet is provided on the housing 1, which is located on one side of the radiating structure 2, and the airflow from the air outlet flows through the heat exchange surface 21. By utilizing the airflow from the air outlet to flow through the heat exchange surface 21, the air in contact with the heat exchange surface 21 is disturbed, effectively enhancing the heat exchange efficiency of the radiant structure 2. When the heat exchange capacity of the radiant structure 2 meets the heat exchange requirements, the radiant structure 2 is used preferentially for radiant heat exchange, making full use of the noiseless advantage of the radiant structure 2 to improve the comfort of the air conditioning terminal. When the heat exchange capacity of the radiant structure 2 cannot meet the heat exchange requirements or there is a dehumidification requirement, the air outlet is controlled to discharge air to the heat exchange surface 21. The low-humidity airflow, after being processed inside the air conditioning terminal, flows through the heat exchange surface 21. This airflow can supplement the heat exchange capacity of the radiant structure 2 and meet the dehumidification requirements, while also avoiding the problem of condensation on the heat exchange surface 21. Moreover, this airflow can disturb the air in contact with the heat exchange surface 21, overcoming the thermal inertia inherent in the radiant panel itself in the prior art, further improving the heat exchange efficiency of the radiant structure 2. Furthermore, since the airflow from the air outlet flows through the heat exchange surface 21, the airflow can be slowed down by the turbulence of the heat exchange surface 21, ensuring that there is no draft in the room, further improving the comfort of the air conditioning terminal.

[0041] Specifically, the air outlet includes a first air outlet 31, which is located above the radiating structure 2, and the airflow through the first air outlet 31 flows from the upper part of the heat exchange surface 21 to the lower part of the heat exchange surface 21. Figure 1Taking the case where the heat exchange surface 21 of the radiating structure 2 is parallel to the vertical plane as an example, the airflow from the first air outlet 31 flows downward along the heat exchange surface 21, increasing the air turbulence on the heat exchange surface 21 and improving its heat exchange efficiency. Simultaneously, the airflow from the first air outlet 31 can continue to flow downward and exit from the lower end of the heat exchange surface 21, thus exchanging heat with the room and improving its heat exchange efficiency. It should be noted that the airflow from the first air outlet 31 can flow across the entire surface of the heat exchange surface 21. This airflow can turbulently move the air across the entire surface of the heat exchange surface 21, ensuring that the heat exchange efficiency at any position on the heat exchange surface 21 is improved, maximizing the heat exchange efficiency of the radiating structure 2.

[0042] The air outlet includes a second air outlet 32, which is located below the radiating structure 2, and the airflow through the second air outlet 32 ​​flows from the lower part of the heat exchange surface 21 to the upper part of the heat exchange surface 21. Figure 1 Taking the case where the heat exchange surface 21 of the radiant structure 2 is parallel to the vertical plane as an example, the airflow from the second air outlet 32 ​​flows upward along the heat exchange surface 21, increasing the air turbulence on the heat exchange surface 21 and improving its heat exchange efficiency. Simultaneously, the airflow from the second air outlet 32 ​​can continue to flow downward and exit from the upper end of the heat exchange surface 21, thus exchanging heat with the room and improving its heat exchange efficiency. It should be noted that the airflow from the second air outlet 32 ​​can flow across the entire surface of the heat exchange surface 21. This airflow can turbulently move the air across the entire surface of the heat exchange surface 21, ensuring that the heat exchange efficiency at any position on the heat exchange surface 21 is improved, maximizing the heat exchange efficiency of the radiant structure 2.

[0043] When the air outlet includes both the first air outlet 31 and the second air outlet 32, the first air outlet 31 and the second air outlet 32 ​​are switched on to avoid airflow accumulation in the middle of the heat exchange surface 21 due to the simultaneous airflow from the first air outlet 31 and the second air outlet 32, thus ensuring the heat exchange efficiency of the heat exchange surface 21.

[0044] To enable the airflow from the outlet to supplement the heat exchange of the radiant structure 2, the air conditioning terminal also includes a heat exchanger. An airflow channel is provided within the housing 1, and the heat exchanger is disposed within the airflow channel. The first air outlet 31 and / or the second air outlet 32 ​​are connected to the airflow channel. That is, the airflow discharged from the first air outlet 31 and / or the second air outlet 32 ​​first exchanges heat with the medium inside the heat exchanger, becoming hot or cold air, and then is discharged from the first air outlet 31 or the second air outlet 32. This allows the airflow to exchange heat with the room while still disturbing the gas on the heat exchange surface 21, thereby supplementing the heat exchange capacity of the radiant structure 2 and improving the heat exchange efficiency of the air conditioning terminal.

[0045] In one implementation, the heat exchanger has a cooling mode and a heating mode:

[0046] When the heat exchanger is in cooling mode, the second air outlet 32 ​​is connected to the airflow channel. At this time, the airflow in the airflow channel is cold air. In order to avoid the problem of reduced comfort caused by cold air blowing directly into the room, the air is blown upward from the second air outlet 32. This ensures the improvement of the radiant heat exchange efficiency of the radiant structure 2 and avoids the cold air blowing directly into the room. Moreover, since the heat exchanger is in cooling mode, it means that the air conditioning terminal is in cooling or dehumidifying state. There is a possibility of condensation on the heat exchange surface 21 of the radiant structure 2. At this time, the cold air can blow the condensation generated on the heat exchange surface 21 upward. During the upward flow, the condensation is turned into steam again by the heat load in the room, thus avoiding the generation of condensation on the radiant structure 2 and avoiding the problem of water dripping on the surface of the air conditioning terminal.

[0047] When the heat exchanger is in heating mode, the first air outlet 31 is connected to the airflow channel. At this time, the airflow in the airflow channel is hot air, which is discharged downwards from the first air outlet 31. This ensures that the radiative heat exchange efficiency of the radiant structure 2 is improved, allowing the hot air to quickly enter the indoor area and improve the heating effect of the room.

[0048] The air conditioning terminal also includes an air outlet structure. Since the air outlet structure needs to form an air outlet, and the air outlet needs to flow through the heat exchange surface 21, the air outlet structure will inevitably protrude from the housing 1, forming a protruding structure on the housing 1, which seriously affects the aesthetics of the air conditioning terminal. Therefore, the air outlet structure is movably set on the housing 1, and the air outlet structure has a ventilation state and a retracted state: when the air outlet structure is in the ventilation state, the air outlet structure protrudes from the housing 1 to form the first air outlet 31 and / or the second air outlet 32; when the air outlet structure is in the retracted state, the air outlet structure is inside the housing 1. In other words, the air conditioning terminal can select the state of the air outlet structure as needed. When the first air outlet 31 and / or the second air outlet 32 ​​are needed to outlet air, the air outlet structure is switched to the ventilation state. At this time, the air outlet structure protrudes from the housing 1 to form the first air outlet 31 and / or the second air outlet 32. At this time, the air conditioning terminal is in the mode of simultaneous radiant heat exchange in the radiant structure 2 and heat exchange in the heat exchanger. When the air conditioning terminal does not need the first air outlet 31 and / or the second air outlet 32 ​​to outlet air, the air outlet structure is switched to the retracted state. At this time, the air outlet structure is retracted into the interior of the housing 1. The appearance of the air conditioning terminal is the same as the structure of the housing 1, without any protruding structure. The appearance is aesthetically pleasing and can also prevent indoor dust and other particles from entering the interior of the housing 1 through the first air outlet 31 and / or the second air outlet 32, ensuring the cleanliness of the interior of the housing 1 and further improving comfort.

[0049] Since the first air outlet 31 is located above the radiating structure 2, and the second air outlet 32 ​​is located below the radiating structure 2, and both are located on the portion of the air outlet structure protruding from the housing 1, when air is discharged from the second air outlet 32, the air outlet structure constituting the first air outlet 31 will obstruct the airflow of the second air outlet 32. This airflow will accumulate on the upper part of the air outlet structure constituting the first air outlet 31 and the heat exchange surface 21, causing the airflow at the upper part of the heat exchange surface 21 to remain undisturbed, resulting in a reduction in the heat exchange efficiency of the radiating structure 2. Therefore, the air outlet structure includes a first... The first air outlet structure 41 is disposed above the radiating structure 2. When the first air outlet structure 41 is in the ventilation state, the first air outlet 31 is formed on the first air outlet structure 41. That is, by utilizing the movement of the first air outlet structure 41, when air is discharged from the second air outlet 32, the first air outlet structure 41 switches to the retracted state and is stored in the housing 1. The airflow from the second air outlet 32 ​​can smoothly flow through the location of the first air outlet structure 41 and accumulate and flow into the room for heat exchange, ensuring the heat exchange efficiency of the radiating structure 2.

[0050] Similarly, when air is discharged from the first air outlet 31, the air outlet structure constituting the second air outlet 32 ​​obstructs the airflow from the first air outlet 31. This airflow accumulates at the lower part of the air outlet structure constituting the second air outlet 32 ​​and the heat exchange surface 21, preventing the airflow at the lower part of the heat exchange surface 21 from being disturbed. This reduces the heat exchange efficiency of the radiant structure 2. The air outlet structure includes a second air outlet structure 42. The first air outlet structure 41 is located above the radiant structure 2, and when the second air outlet structure 42 is in the ventilation state, the second air outlet 32 ​​is formed on the first air outlet structure 41. That is, by utilizing the movement of the second air outlet structure 42, when air is discharged from the first air outlet 31, the second air outlet structure 42 switches to a retracted state and is stored in the housing 1. The airflow from the first air outlet 31 can smoothly flow through the location of the second air outlet structure 42 and continue to flow into the room for heat exchange, ensuring the heat exchange efficiency of the radiant structure 2.

[0051] Optionally, the air conditioning terminal further includes a drive structure, which is disposed on the housing 1, and the air outlet structure is connected to the drive structure. The drive structure drives the air outlet structure to move, thereby switching the air outlet structure between a ventilation state and a retraction state.

[0052] like Figure 4As shown in the figure, the drive structure includes a drive motor and a rack 51. A drive gear 52 is provided on the output shaft of the drive motor, and the rack 51 is provided on the air outlet structure. The drive gear 52 can mesh with the rack 51. When the drive motor rotates forward, the air outlet structure can switch to the ventilation state under the meshing action of the drive gear 52 and the rack 51. When the drive motor rotates in reverse, the air outlet structure can switch to the retracted state under the meshing action of the drive gear 52 and the rack 51.

[0053] The air outlet structure includes a ventilation duct, one end of which is connected to the airflow channel. A ventilation opening is provided on the side wall of the ventilation duct facing the radiation structure 2. The ventilation opening is configured as either a first air outlet 31 or a second air outlet 32 ​​depending on the location of the air outlet structure. That is, when the ventilation duct is located above the radiation structure 2, the ventilation opening is the first air outlet 31, and when the ventilation duct is located below the radiation structure 2, the ventilation opening is the second air outlet 32. The rack 51 is mounted on the ventilation duct, and the meshing of the rack 51 and the drive gear 52 enables the ventilation duct to move. When the air outlet structure is in the ventilation state, the vent protrudes from the housing 1 and faces the heat exchange surface 21. Preferably, the edge of the vent near the heat exchange surface 21 is on the same plane as the heat exchange surface 21, which can avoid the generation of eddies or dead zones on the heat exchange surface 21 and ensure the heat exchange efficiency of the radiation structure 2. When the air outlet structure is in the retracted state, the vent is retracted into the housing 1 and blocked. At this time, the airflow cannot enter the ventilation duct, thereby preventing gas from entering the ventilation duct under the action of air pressure and avoiding the problem of air leakage.

[0054] Optionally, the length of the ventilation duct is greater than or equal to the length of the heat exchange surface 21, which also avoids the generation of eddies or dead zones on the heat exchange surface 21 and ensures the heat exchange efficiency of the radiation structure 2.

[0055] The air conditioning terminal also includes a fan 6, which is disposed within the airflow channel and electrically connected to the drive structure. The fan 6 draws gas from outside the housing 1 into the housing 1, and after passing through the heat exchanger, it flows out through the first air outlet 31 and / or the second air outlet 32. This allows the air conditioning terminal to have a heat exchange mode combining radiative and ventilatory heat exchange, achieving the beneficial effects of improving radiative heat exchange efficiency, a heating mode primarily based on radiative heat exchange and supplemented by airflow heat exchange, and meeting dehumidification requirements.

[0056] Among them, the fan 6 has an adjustable speed, which allows the fan 6 to adjust the air volume and speed according to the demand, so that the air conditioning terminal can be precisely adjusted according to the indoor load demand, further improving the heat exchange efficiency of the air conditioning terminal and reducing the energy consumption of the air conditioning terminal.

[0057] Preferably, the heat exchanger includes two surface coolers, which are respectively disposed on the upper and lower sides of the fan 6. The return air inlet is located on the side of the fan 6 away from the radiation structure 2. The fan 6 can obtain gas from the return air inlet and send the gas outward along the periphery of the fan 6 so that the gas passes through the surface coolers, and then flows out through the first air outlet 31 and / or the second air outlet 32 ​​as needed.

[0058] Optionally, the first air outlet 31 corresponds to the first surface cooler 71, and the second air outlet 32 ​​corresponds to the second surface cooler 72.

[0059] When the air conditioning terminal is in cooling mode, cold water is sent into the second surface cooler 72. At this time, the first surface cooler 71 does not exchange heat, and the air from the fan 6 can only pass through the second surface cooler 72 and then flow through the second air outlet 32 ​​for cooling.

[0060] When the air conditioner terminal is in heating mode, hot water is sent into the first surface cooler 71. At this time, the second surface cooler 72 does not exchange heat, and the gas from the fan 6 can only pass through the first surface cooler 71 and then flow through the first air outlet 31 for heating.

[0061] A drip tray is provided below the second surface cooler 72 to collect the condensate generated during operation of the second surface cooler 72.

[0062] The radiant structure 2 includes a radiant plate 22 and a heat exchange tube 23. The radiant plate 22 is disposed on the shell 1, and the side of the radiant plate 22 away from the shell 1 forms the heat exchange surface 21. The heat exchange tube 23 is disposed on the side of the radiant plate 22 facing the interior of the shell 1. By introducing a corresponding refrigerant (such as hot or cold water) into the heat exchange tube 23, the heat exchange tube 23 can supply heat or cold to the radiant plate 22, and then radiative heat exchange can occur through the radiant plate 22.

[0063] The heat exchange capacity of the refrigerant in heat exchange tube 23 can be the same as or different from that of the refrigerant in the heat exchanger. Taking water as an example, the heat exchange capacity of water includes temperature, flow rate, etc.

[0064] When the heat exchange capacity of the refrigerant in heat exchange tube 23 is different from that of the refrigerant in the heat exchanger, cold water at a first temperature can be introduced into the radiant structure 2 to meet the indoor sensible heat demand. At the same time, cold water at a second temperature is introduced into the heat exchanger to supplement the heat load demand and dehumidification demand. The first temperature is higher than the second temperature. At this time, the radiant structure 2, which has a slightly higher temperature, can directly radiate and cool the room. The temperature of the heat exchanger is slightly lower. The airflow flowing through it can be cooled and dehumidified into low-temperature and low-humidity gas, and then sent into the room, thereby reducing the indoor humidity and supplementing the heat exchange capacity of the radiant structure 2.

[0065] A thermal insulation structure 8 is provided between the radiating structure 2 and the airflow channel. The thermal insulation layer separates the radiating structure 2 and the airflow channel, preventing the transfer of heat between the insulation structure and the gas in the airflow channel, thus avoiding energy waste or condensation on the heat exchange surface 21 due to excessive cooling.

[0066] When the air conditioner terminal is off, the first air outlet 31 and the second air outlet 32 ​​are retracted, and the surface of the casing 1 is smooth with no air vents. When the air conditioner terminal is on, if both radiant heat exchange and airflow heat exchange are required simultaneously, the fan 6 starts, and simultaneously activates the corresponding drive gear 52 for different modes (cooling mode or heating mode), automatically extending the corresponding air outlet (the second air outlet 32 ​​is extended in cooling mode, and the first air outlet 31 is extended in heating mode). The specific air delivery pattern is as follows: Figure 4 and Figure 5 As shown ( Figure 4 This refers to the air supply method in cooling mode. Figure 5 (This refers to the air supply method in heating mode).

[0067] Specifically, when running in cooling mode, the control principle is as follows: Figure 6 As shown, the control system automatically calculates the indoor load demand and prioritizes the use of radiant structure 2 to meet the indoor sensible heat demand. Cold water flowing in heat exchange tube 23 continuously supplies cooling to heat exchange surface 21. When the cooling capacity cannot handle the indoor heat load or when dehumidification is required, fan 6 starts, automatically opening the second air outlet 32 ​​while the first air outlet 31 remains retracted. Cold water passes through the second surface cooler 72 to process indoor return air and supplement the load demand. The processed low-temperature, low-humidity air is then delivered from the second air outlet 32, adhering to the heat exchange surface 21. This effectively prevents condensation on the heat exchange surface 21 while handling the indoor heat and humidity load, and also disturbs the heat exchange surface 21 to enhance heat exchange between the radiant structure 2 and the room. Indoor load demand is calculated every n minutes to reassess the air conditioning terminal usage status. Based on the indoor load demand, fan 6 can operate at low airflow or intermittently, reducing equipment noise and minimizing draft for indoor occupants, significantly improving comfort.

[0068] When the heating mode is running, the hot water flowing in the heat exchange tube 23 continuously supplies heat to the heat exchange surface 21. When the heat supply cannot meet the indoor cooling load, the fan 6 starts and the first air outlet 31 automatically pops out. The hot water passes through the first surface cooler 71 to process the indoor return air and supplement the load demand. The processed return air is sent downward from the first air outlet 31 along the heat exchange surface 21. The air disturbance on the plate can enhance the convective heat exchange between the heat exchange surface 21 and the air. The fan 6 can operate at a small air volume or intermittently, and has the advantages of low noise and no strong blowing sensation.

[0069] The air conditioning terminal can calculate the cooling capacity of the radiant structure 2 based on the supply and return water temperature and flow rate of the radiant panel 22, and compare it with the indoor sensible heat load calculated by the control system. When the cooling capacity of the radiant structure 2 is less than the indoor sensible heat load, it is determined that the cooling capacity cannot meet the requirements, thus realizing the judgment that the cooling capacity cannot bear the indoor heat load.

[0070] Dehumidification requirements are determined based on indoor relative humidity detection and comparison with set limits.

[0071] The indoor load demand fan 6 can operate intermittently, including: when the current assessment result is that there is no dehumidification demand and the radiant panel 22 can meet the sensible heat demand, the fan 6 does not run, but when the next assessment result is that there is a dehumidification demand or the radiant panel 22 cannot meet the sensible heat demand, the fan 6 is turned on. This is intermittent operation.

[0072] The requirement for low-volume operation of fan 6 in relation to indoor load demand means that, compared to traditional convection terminals, the air volume output or the speed of fan 6 is reduced. Because the radiant structure 2 bears a portion of the sensible heat load, the load on fan 6 and heat exchanger is reduced compared to traditional convection terminals, thus allowing for low-volume operation, reducing fan 6 noise and energy consumption.

[0073] An air conditioning system includes the aforementioned air conditioning terminal.

[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An air conditioning terminal, characterized in that: include: Shell (1); A radiation structure (2) is disposed on the housing (1), and the heat exchange surface (21) of the radiation structure (2) faces the outside of the housing (1); An air outlet is provided on the housing (1), the air outlet is located on one side of the radiation structure (2), and the airflow of the air outlet flows through the heat exchange surface (21). The air outlet includes a first air outlet (31), the first air outlet (31) is located above the radiation structure (2), and the airflow of the first air outlet (31) flows from the upper part of the heat exchange surface (21) to the lower part of the heat exchange surface (21). The air outlet includes a second air outlet (32), which is located below the radiation structure (2), and the airflow of the second air outlet (32) flows from the lower part of the heat exchange surface (21) to the upper part of the heat exchange surface (21). The air conditioning terminal also includes a heat exchanger. An airflow channel is provided inside the housing (1). The heat exchanger is located inside the airflow channel. The first air outlet (31) and / or the second air outlet (32) are connected to the airflow channel. The heat exchanger has a cooling mode and a heating mode: When the heat exchanger is in cooling mode, the second air outlet (32) is connected to the airflow channel; When the heat exchanger is in heating mode, the first air outlet (31) is connected to the airflow channel.

2. The air conditioning terminal according to claim 1, characterized in that: The air conditioning terminal also includes an air outlet structure, which is movably mounted on the housing (1) and has a ventilation state and a retracted state. When the air outlet structure is in the ventilation state, the air outlet structure protrudes from the housing (1) to form the first air outlet (31) and / or the second air outlet (32). When the air outlet structure is in the retracted state, the air outlet structure is inside the housing (1).

3. The air conditioning terminal according to claim 2, characterized in that: The air outlet structure includes a first air outlet structure (41), which is disposed above the radiation structure (2), and when the first air outlet structure (41) is in the ventilation state, the first air outlet (31) is formed on the first air outlet structure (41). And / or, the air outlet structure includes a second air outlet structure (42), which is disposed below the radiation structure (2), and when the second air outlet structure (42) is in the ventilation state, a second air outlet (32) is formed on the first air outlet structure (41).

4. The air conditioning terminal according to claim 2, characterized in that: The air conditioning terminal also includes a drive structure, which is disposed on the housing (1), and the air outlet structure is connected to the drive structure.

5. The air conditioning terminal according to claim 4, characterized in that: The air conditioning terminal also includes a fan (6), which is disposed in the airflow channel and is electrically connected to the drive structure.

6. The air conditioning terminal according to claim 1, characterized in that: The radiation structure (2) includes a radiation plate (22) and a heat exchange tube (23). The radiation plate (22) is disposed on the shell (1), and the side of the radiation plate (22) away from the shell (1) forms the heat exchange surface (21). The heat exchange tube (23) is disposed on the side of the radiation plate (22) facing the interior of the shell (1).

7. The air conditioning terminal according to claim 2, characterized in that: A heat insulation structure (8) is provided between the radiation structure (2) and the airflow channel.

8. An air conditioning system, characterized in that: Includes the air conditioning terminal as described in any one of claims 1 to 7.

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