Air conditioning system

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioning system. The air temperature, the air humidity and the radiation surface temperature in any area are obtained, and the dew point temperature of the corresponding area is calculated. Then, under the condition that it is determined that the radiation surface temperature of any area is smaller than the dew point temperature, a three-way valve in the area controls a replacement pipe to be communicated with a water inlet of a refrigeration pipeline in the area, and a two-way valve in the area is controlled to be closed, so that a water return pipeline in the area stops being used. And after the preset time is up, the water supply pipe is re-controlled to be communicated with the water inlet of the refrigeration pipeline in the area, and the two-way valve is controlled to be opened. According to the system, the three-way valve and the replacement pipe are installed in advance, the problem that in an existing method, the consumed time is long due to the fact that the temperature of the cold radiation surface is increased by depending on temperature rise of a room is effectively solved, the local countercurrent effect is achieved, and the temperature of the radiation surface can be rapidly increased.

Description

Technical Field

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

[0002] With the continuous improvement of modern buildings' requirements for energy conservation, comfort, and health, the five-constant air conditioning system has gradually become a new choice for users due to its integrated features of constant temperature, constant humidity, constant oxygen, constant cleanliness, and constant quietness.

[0003] The five-constant air conditioning system effectively meets users' requirements for indoor comfort by reasonably laying capillary tube networks on the ceiling or the inner side of the wall and floor, and adopting a composite regulation method mainly based on radiant cooling and supplemented by displacement ventilation. However, there is an obvious problem when this system operates in summer: when the cold radiation surface encounters humid and hot air, condensation is likely to occur, which may further lead to mildew on the cold radiation surface.

[0004] The existing solution is to block the cold water supply by closing the two-way valve in the room, and then rely on the room's own temperature rise to increase the temperature of the cold radiation surface, but this method takes a long time. Summary of the Invention

[0005] This application provides an air conditioning system to solve the problem of the long time-consuming caused by the existing method that only relies on the room's own temperature rise to increase the temperature of the cold radiation surface.

[0006] In a first aspect, this application provides an air conditioning system, including: a controller, a water tank, a water supply pipe, a return pipe, a replacement pipe, a three-way valve, and a first two-way valve;

[0007] The first water outlet of the water tank is connected to the water supply pipe, and the water flowing out of the first water outlet of the water tank is cooled water; the water inlet of the refrigeration pipeline in each area is respectively connected to the water supply pipe and the replacement pipe through the three-way valve in each area; the return pipe is connected to the water outlet of the refrigeration pipeline in each area and is connected to the first water return port of the water tank, and the two-way valve is arranged on the return pipe; the controller is electrically connected to the three-way valve and the two-way valve respectively;

[0008] The controller is configured to, when the radiation surface temperature in any area is less than the dew point temperature, control the replacement pipe to communicate with the water inlet of the refrigeration pipeline in the any area through the three-way valve in the any area, and control the two-way valve to close.

[0009] Optionally, the controller is further configured to,

[0010] when the radiation surface temperature in each area is greater than or equal to the dew point temperature, control the water supply pipe to communicate with the water inlet of the refrigeration pipeline in each area through the three-way valve in each area, and control the two-way valve to open.

[0011] Optionally, the controller is further configured to, after a preset time of controlling the replacement pipe to communicate with the water inlet of the refrigeration pipeline in any area through the three-way valve in any area and controlling the two-way valve to close, control the water supply pipe to communicate with the water inlet of the refrigeration pipeline in any area through the three-way valve in any area and control the two-way valve to open.

[0012] Optionally, it further includes: air temperature and humidity sensors and surface temperature sensors arranged in each area; the controller is electrically connected to the three-way valve and the two-way valve respectively; the surface temperature sensor is used to detect the radiant surface temperature of the area, and the air temperature and humidity sensor is used to detect the air temperature and air humidity of the area;

[0013] The controller is further configured to determine the dew point temperature according to the air temperature, the air humidity and the radiant surface temperature.

[0014] Optionally, the replacement pipe is connected to the second water return port of the water tank.

[0015] Optionally, it further includes a main unit; the controller is electrically connected to the main unit;

[0016] The water at the second water outlet of the water tank is cooled by the main unit and then flows back to the first water inlet of the water tank, and then flows out from the first water outlet of the water tank to the water supply pipe.

[0017] Optionally, it further includes a first water pump; the controller is electrically connected to the first water pump;

[0018] The first water pump is arranged between the first water outlet of the water tank and the water supply pipe.

[0019] Optionally, it further includes a second water pump; the controller is electrically connected to the second water pump;

[0020] The second water pump is arranged between the second water outlet of the water tank and the main unit.

[0021] Optionally, it further includes: a second two-way valve; the controller is electrically connected to the second two-way valve;

[0022] The second two-way valve in each area is arranged between the return water pipe and the water outlet of the refrigeration pipeline in each area.

[0023] Optionally, it further includes: a pure water machine; the pure water machine is connected to the second water inlet of the water tank; the pure water machine is used to soften the municipal water supply and supply water to the water tank.

[0024] The air conditioning system provided by this application obtains the air temperature, air humidity, and radiant surface temperature in any area, and calculates the dew point temperature of the corresponding area. Subsequently, when it is determined that the radiant surface temperature of any area is less than the dew point temperature, the three-way valve in this area is controlled to connect the replacement pipe to the water inlet of the refrigeration pipeline in this area, and the two-way valve in this area is controlled to close, so that the return water pipeline in this area stops being used. Then, after the preset time is reached, the water supply pipe is re-controlled to be connected to the water inlet of the refrigeration pipeline in this area, and the two-way valve is controlled to open. By pre-installing the three-way valve and the replacement pipe, this system effectively solves the problem of long time consumption caused by the existing method relying on the room's own temperature increase to raise the cold radiant surface temperature, realizes a local countercurrent effect, and can quickly increase the temperature of the radiant surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0026] Figure 1 Schematic diagram of the existing structure provided by this application;

[0027] Figure 2 Schematic diagram of the scenario of the air conditioning system provided by this application;

[0028] Figure 3 Schematic diagram of the structure of the air conditioning system provided by this application Figure 1 ;

[0029] Figure 4 Schematic diagram of the structure of the air conditioning system provided by this application Figure 2 ;

[0030] Figure 5 Schematic diagram of the process of the air conditioning system provided by this application.

[0031] Through the above-mentioned drawings, the clear embodiments of this application have been shown, and there will be more detailed descriptions later. These drawings and written descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0033] In the description and claims of the present invention and the above-mentioned drawings, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented, for example, in an order different from those illustrated or described herein.

[0034] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0035] With the continuous improvement of people's requirements for indoor environmental quality, the limitations of traditional air-conditioning systems in terms of temperature fluctuation, humidity control, noise interference, etc. have gradually become prominent. The five-constant air conditioner, with its integrated features of "constant temperature, constant humidity, constant oxygen, constant quietness, and constant cleanliness", realizes a more comfortable, healthy and energy-saving living experience by controlling indoor environmental parameters, and is welcomed by more and more users.

[0036] The five-constant air-conditioning system effectively meets the user's demand for indoor comfort by reasonably laying capillary tube networks on the ceiling or the inner side of the wall and floor, and adopting a composite adjustment method mainly based on radiant cooling and supplemented by displacement ventilation. However, there is an obvious problem when this system operates in summer: when the radiant surface encounters humid and hot air, condensation is likely to occur, which in turn causes the cold radiant surface to mildew.

[0037] The existing solution is to block the cold water supply by closing the two-way valve in the room, and then rely on the room's own temperature rise to increase the temperature of the cold radiant surface, which takes a long time.

[0038] Exemplarily, Figure 1 The schematic diagram of the existing structure provided for the present application is as Figure 1As shown in the figure. The existing structure includes a controller, a host, a water pump, a two-way valve, a surface temperature sensor, and an air temperature and humidity sensor. In the water flow system of Area A, cold water is split at the 1 o'clock position and then enters Area A through the 2 o'clock position. The cold water circulates in Area A, passing through the 3 o'clock and 4 o'clock positions in sequence, and finally reaching the 5 o'clock return pipe. Eventually, it is pumped back to the host by the water pump, and after being refrigerated again, it participates in the cycle. However, when the surface temperature of the cold radiation in Area A drops to the point of condensation, according to the existing control scheme, the two-way valve in Area A will immediately close. This causes the water in the return pipe to no longer flow to the water tank, and as a result, the water in Area A can only enter but cannot be discharged. As time goes by, due to the continuous closure of the two-way valve, the water system in Area A finally gets into a state where it can neither intake nor discharge water. At this time, the water in Area A can only rely on the increase in its own temperature in its own area to gradually raise the surface temperature of the cold radiation.

[0039] In view of the above problems, the present application provides an air conditioning system. Figure 2 It is a schematic diagram of the scenario of the air conditioning system provided in this embodiment, as Figure 2 shown. The air conditioning system starts the second water pump, extracts water from the water tank, and refrigerates this water through the host. After the refrigeration is completed, the cold water will be sent back to the water tank for storage. Then, the air conditioning system extracts the already refrigerated low-temperature cold water from the water tank through the first water pump, and then delivers it to Areas A, B, and C in parallel through three paths via the water supply pipeline. At this time, the water flow path in Area A is as follows: the water in the water supply pipe enters from the 1 o'clock position, and then flows through the three-way valve A→B through the 2 o'clock position and enters Area A. The water circulates in Area A, passing through the 3 o'clock and 4 o'clock positions in sequence, and finally reaches the 5 o'clock return pipe, and flows through this return pipe to the two-way valve, and re-enters the water tank through the 6 o'clock position.

[0040] The water flow path in Area B is as follows: the water in the water supply pipe enters from the 1' o'clock position, and then flows through the three-way valve A→B through the 2' o'clock position and enters Area B. The water circulates in Area B, passing through the 3' o'clock and 4' o'clock positions in sequence, and finally reaches the 5' o'clock return pipe, and flows through this return pipe to the two-way valve, and re-enters the water tank through the 6 o'clock position.

[0041] The water flow path in Area C is as follows: the water in the water supply pipe enters from the 1'' o'clock position, and then flows through the three-way valve A→B through the 2'' o'clock position and enters Area C. The water circulates in Area C, passing through the 3'' o'clock and 4'' o'clock positions in sequence, and finally reaches the 5'' o'clock return pipe, and flows through this return pipe to the two-way valve, and re-enters the water tank through the 6 o'clock position.

[0042] However, when condensation occurs on the cold radiation surface in area A, the control logic provided by this application is as follows: First, the three-way valve in area A will switch from the 61→63 state to the 63→62 state, causing the water in the water supply pipe to be unable to flow into area A through point 1. At the same time, the two-way valve on the return pipe will be closed to prevent the water in the return pipe from flowing into the water tank. Subsequently, since condensation does not occur on the cold radiation surfaces in areas B and C, their water flow paths remain unchanged, that is, they continue to flow along the original circulation path. However, due to the closing of the two-way valve on the return pipe, the water flows in areas B and C will, after flowing out of their respective rooms, change the path and pass through the return pipe in area A. At this time, the water flow path in area B becomes: water supply pipe → 1’ → 2’ → 3’ → 4’ → 5’ → return pipe → 5 → 4 → 3 → 2 → 7 → replacement pipe → 8 → water tank, and the water flow path in area C becomes: 1'' → 2'' → 3'' → 4'' → 5'' → return pipe → 5 → 4 → 3 → 2 → 7 → replacement pipe → 8 → water tank.

[0043] In this way, a countercurrent phenomenon can be generated in the return pipe, thereby rapidly increasing the temperature of the cold water in area A and avoiding condensation on the cold radiation surface in area A.

[0044] This application provides an air conditioning system. By obtaining the air temperature, air humidity, and radiation surface temperature in any area and calculating the dew point temperature of the corresponding area. Subsequently, when it is determined that the radiation surface temperature in any area is less than the dew point temperature, the replacement pipe is controlled to be connected to the water inlet of the refrigeration pipeline in this area through the three-way valve in this area, and the two-way valve in this area is controlled to close, so that the return water pipeline in this area stops being used. Then, after the preset time is reached, the water supply pipe is re-controlled to be connected to the water inlet of the refrigeration pipeline in this area, and the two-way valve is controlled to open. This system effectively solves the problem of long time consumption caused by the existing method relying on the increase of the room's own temperature to increase the radiation surface temperature by pre-installing a three-way valve and a replacement pipe, realizes a local countercurrent effect, and can quickly increase the temperature of the radiation surface.

[0045] The following uses specific embodiments to elaborate in detail on the technical solutions of this application and how the technical solutions of this application solve the above technical problems. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following will describe the embodiments of this application in conjunction with the drawings.

[0046] Figure 3 Structural schematic of the air conditioning system provided for this embodiment Figure 1 As Figure 3 shown, the air conditioning system provided for this embodiment includes: a controller 1, a water tank 2, a water supply pipe 3, a return pipe 4, a replacement pipe 5, a three-way valve 6, and a first two-way valve 7;

[0047] The first water outlet 21 of the water tank 2 is connected to the water supply pipe 3, and the water flowing out of the first water outlet 21 of the water tank 2 is chilled water; the water supply pipe 3 and the replacement pipe 5 are respectively connected to the water inlet of the refrigeration pipeline in each area through a three-way valve 6 in each area; the return pipe 4 is connected to the water outlet of the refrigeration pipeline in each area and is connected to the first water return port 22 of the water tank 2, and a two-way valve 7 is arranged on the return pipe 4; the controller 1 is electrically connected to the three-way valve 6 and the two-way valve 7 respectively.

[0048] The controller 1 is configured to, when the radiant surface temperature in any area is less than the dew point temperature, control the replacement pipe to communicate with the water inlet of the refrigeration pipeline in any area through the three-way valve in any area, and control the two-way valve to close.

[0049] Among them, the water tank 2 serves as a cold source buffer container and has a water storage function. On the one hand, the water tank can store the low-temperature chilled water after being cooled by the main unit; on the other hand, the water tank can also receive the return water with an increased temperature after heat exchange is completed by the capillary networks in each area. In addition, the water tank helps to stabilize the water temperature, reduce indoor temperature fluctuations, and thus effectively improve the comfort level. At the same time, the function of the water tank can reduce the start-stop frequency of the main unit and extend the service life of the main unit.

[0050] The water supply pipe 3 serves as a low-temperature chilled water transportation channel, and it is respectively connected to the water inlet of the refrigeration pipeline in each area through a three-way valve in each area. In the refrigeration mode, this pipeline continuously transports the chilled water pre-cooled to the set temperature by the main unit 10 to the capillary network, and reduces the indoor temperature through radiant heat transfer.

[0051] The return pipe 4 serves as a recovery channel for the heated water flow, is connected to the water outlet of the refrigeration pipeline in each area, and guides these heated water flows to the first water return port 22 of the water tank. A two-way valve is arranged on the return pipe 4, and this valve can be controlled to cut off the water flow, so as to forcibly store the heated water in the return pipeline when needed.

[0052] The replacement pipe 5 serves as an emergency return water supply channel and is connected to the water inlet of the refrigeration pipeline in each area through a three-way valve arranged in each area. When the controller 1 detects the occurrence of condensation in a certain area, the controller 1 will quickly switch the port of the three-way valve, so that the water in the return pipe 4 that originally flowed to other areas is redirected to the capillary network in the area where condensation occurs. Subsequently, this water will be redirected back to the water tank 2 through the replacement pipe 5 for further treatment or recycling.

[0053] The three-way valve 6, as an electric three-way switch regulating valve, has three ports: The first port 61 serves as the low-temperature cold water inlet for receiving cold water from the water supply pipe 3. The second port 62 is connected to the replacement pipe 5 for delivering the return water to the replacement pipe. The third port 63 is a flexible connection port. When the third port 63 is in communication with the first port 61, the three-way valve 6 acts as a channel for delivering cold water into the room, directly sending the low-temperature cold water into the radiant terminal for refrigeration; while when the third port 63 is in communication with the second port 62, the three-way valve 6 is transformed into a return water channel for delivering the return water to the replacement pipe 5, and then these return waters are sent back to the water tank 2 for reprocessing.

[0054] The first two-way valve 7 is installed near the water tank 2 at the end of the return water pipe 4 and remains fully open under normal conditions, enabling the end return water to flow directly back to the water tank 2 through the return water pipe 4. When the controller 1 determines that there is a risk of condensation in a certain area, it immediately closes this valve, blocking the flow path from the return water pipe 4 to the first water return port 22 of the water tank 2, causing the original return water direction to stop being used; at the same time, the controller 1 switches the three-way valve passage, connecting the end of the return water pipe 4 passing through the condensation area to the replacement pipe 5, enabling the return water of other ends to be supplied to the end of the condensation area through the return water pipe 4, forming a local countercurrent circulation path, and then flowing back into the water tank 2 through the replacement pipe 5. In this way, the radiant surface temperature can be quickly raised above the dew point temperature, achieving the dual goals of condensation suppression and basic temperature control.

[0055] It can be understood that when the air-conditioning system operates in the cooling mode, the water tank 2 stores the cold water cooled by the main unit 10. The water supply pipe 3 serves as a low-temperature cold water transportation channel, delivering the cold water pre-cooled to the set temperature by the main unit to the capillary network through the three-way valve 6 in each area, realizing active indoor cooling. At the same time, the return water pipe 4 is connected to the water outlet of the refrigeration pipeline in each area, guiding the heated water flow to the first water return port 22 of the water tank and flowing back into the water tank again.

[0056] However, when the controller 1 detects condensation on the radiant surface of a certain area, it will react quickly. At this time, the controller 1 will switch the third port 63 from the state of being originally in communication with the first port 61 to being in communication with the second port 62, thereby blocking the water flow in the water supply pipeline from flowing into this area. At the same time, the first two-way valve 7 provided on the return water pipe 4 will also be closed to prevent the water flow in the return water pipe 4 from flowing into the water tank. At this time, the water in the return water pipe 4 will flow countercurrently to the capillary network in this area and be redirected back to the water tank 2 through the replacement pipe 5 for further processing.

[0057] The radiant surface temperature is used to indicate the temperature of the surface of the radiant device in any area. The radiant devices include the ceiling and the wall and floor. For example, if the radiant surface temperature in a certain area is 18 degrees Celsius, it indicates that the temperature of the ceiling in this area is 18 degrees Celsius.

[0058] The dew point temperature is used to indicate the critical temperature value at which water vapor in the air reaches saturation and begins to condense into liquid water under the air pressure conditions in the current area. For example, if the dew point temperature in a certain area is 16 degrees Celsius, it indicates that when the water vapor in the air in this area is below 16 degrees Celsius, the water vapor will condense into liquid water.

[0059] The purpose of this step of judging whether the radiant surface temperature of any area is less than the dew point temperature of any area is to determine whether condensation will occur in any area.

[0060] If the radiant surface temperature of any area is less than the dew point temperature of this area, it indicates that condensation will occur in this area. At this time, it is necessary to control the replacement pipe to communicate with the water inlet of the refrigeration pipeline of any area through the three-way valve of this area, and control the two-way valve to close.

[0061] It can be understood that the radiant surface temperature directly reflects the heat exchange state between the radiant device (such as the ceiling or wall and floor) and the indoor environment, and is a key indicator for judging the condensation risk. The dew point temperature reflects the critical temperature value at which water vapor begins to condense under the current humidity conditions.

[0062] Therefore, when it is monitored that the radiant surface temperature of a certain area is lower than the air dew point temperature of this area, the anti-condensation linkage control mechanism is immediately activated: First step, quickly close the first two-way valve on the return water pipeline of this area to cut off the circulation path of the low-temperature return water directly entering the water tank; Second step, synchronously open and switch the three-way valve 6 of this area so that the return water in the return water pipe 4 flows reversely and re-enters the water tank through the replacement pipe 5.

[0063] For the air conditioning system provided in this embodiment, after obtaining the air temperature, air humidity and radiant surface temperature of any area, first calculate the dew point temperature of this area, then compare the dew point temperature with the radiant surface temperature. Then, when the radiant surface temperature is less than the dew point temperature, control the replacement pipe to communicate with the water inlet of the refrigeration pipeline of this area through the three-way valve of this area, and control the two-way valve to close; Finally, after running for a preset time, control the water supply pipe to communicate with the water inlet of the refrigeration pipeline of this area through the three-way valve of this area again, and control the two-way valve to open. This system realizes the local reverse flow effect by pre-installing the three-way valve and the replacement pipe, which can not only quickly increase the temperature of the radiant surface in a short time, effectively avoid the occurrence of condensation on the radiant surface, but also solve the problem of long time consumption caused by relying on the increase of the room's own temperature to increase the temperature of the cold radiant surface in the existing method.

[0064] Figure 4 The structural schematic of the air conditioning system provided in this embodiment Figure 2 . As Figure 4As shown in the figure, on the basis of the above embodiments, the air-conditioning system provided in this embodiment further includes: an air temperature and humidity sensor 8, a surface temperature sensor 9, a main unit 10, a first water pump 11, a second water pump 12, and a pure water machine 14.

[0065] Among them, the water tank 2 includes: a first water outlet 21, a first water return port 22, a second water return port 23, a second water outlet 24, a first water inlet 25, and a second water inlet 26. Among them, the first water outlet 21 is connected to the first water pump 11, the first water return port 22 is connected to the first two-way valve 7, the second water return port 23 is connected to the replacement pipe 5, the second water outlet 24 is connected to the second water pump 12, the first water inlet 25 is connected to the main unit 10, and the second water inlet 26 is connected to the pure water machine 14.

[0066] The air temperature and humidity sensor 8 is used to detect the air temperature and humidity in the area. The air temperature and humidity sensor 8 is installed on the top or side wall of each area to monitor the indoor air dry bulb temperature and relative humidity in real time. Its data is transmitted to the controller through the bus and used as an input parameter for calculating the current dew point temperature for dew condensation risk prediction.

[0067] The surface temperature sensor 9 is used to detect the radiant surface temperature in the area. The surface temperature sensor 9 is embedded in the gypsum or cement leveling layer on the surface where the corresponding capillary tube is located to monitor the temperature of the radiant surface (such as the ceiling or wall floor) and continuously collect the actual temperature of the radiant surface. This data is compared with the calculation result of the dew point temperature of the air temperature and humidity sensor 8 in real time. When the radiant surface temperature in any area is lower than the dew point temperature, it is determined that the radiant equipment in that area will experience dew condensation.

[0068] The main unit 10 is the cold source core of the water circulation system. The main unit 10 is used to produce chilled water. The working process of the main unit 10 is as follows: draw a part of the return water from the second water outlet 24 of the water tank 2, cool it to the set supply water temperature, and then return it to the low-temperature water storage area of the water tank through the first water inlet 25, and then supply chilled water to the water supply pipe 3 through the first water outlet 21 to form a cold regeneration closed loop.

[0069] The first water pump 11 is used as the power source of the water supply pipe 3 and is arranged between the first water outlet 21 of the water tank and the water supply pipe 3. The first water pump 11 is used to overcome the system resistance to maintain circulation and send the chilled water to the capillary pipe networks in each room.

[0070] The second water pump 12 is responsible for driving the return water into the main unit refrigeration cycle and is arranged between the second water outlet 24 of the water tank and the water inlet end of the main unit 10.

[0071] The pure water machine 14 is connected to the second water inlet 26 of the water tank 2; the pure water machine is used to soften the municipal water supply and supply water to the water tank.

[0072] It can be understood that when the air-conditioning system starts the cooling mode, the main unit 10 extracts water from the water tank 2 through the second water pump 12. After the main unit 10 produces low-temperature chilled water, it returns to the water tank through the first water inlet 25 to complete the basic cycle. At the same time, the cooling cycle is driven by the first water pump 11, which extracts the chilled low-temperature water from the first water outlet 21 of the water tank and transports it to the capillary pipe networks in each area through the water inlet pipe 3 to continuously cool the capillary pipe networks.

[0073] When the radiant surface temperature in any area drops below the dew point temperature of that area, the controller 1 will immediately activate the anti-condensation measure. First, the controller will regulate the three-way reversing valve 6 in that area to change the water flow direction, switching the low-temperature return water from the original water supply pipe - return pipe path to the return pipe - replacement pipe path. At the same time, the controller will synchronously close the first two-way valve 7 on the return pipe of that area. This operation will force the normal return water from other areas to flow through the capillary pipe network of that area first, thus forming a heat compensation cycle. This method not only effectively eliminates the risk of condensation but also maintains the overall cooling efficiency of the system, achieving intelligent control for dynamic balance of temperature and humidity.

[0074] The air-conditioning system provided by this application includes a controller, a water tank, a water supply pipe, a return pipe, a replacement pipe, a three-way valve, a first two-way valve, an air temperature and humidity sensor, a surface temperature sensor, a main unit, a first water pump, a second water pump, and a pure water machine. The water tank stores the chilled water after being refrigerated by the main unit and provides a stable cold water source to each area. The water supply pipe is respectively connected to the water inlet of the refrigeration pipeline in each area through the three-way valve in each area. The return pipe is connected to the water outlet of the refrigeration pipeline in each area and guides the heated water flow to the first water return port of the water tank. The replacement pipe serves as an emergency return water supply channel and is connected to the water inlet of the refrigeration pipeline in each area through the three-way valve set in each area. The three-way valve changes the water flow direction to avoid condensation in each area. The air temperature and humidity sensor is installed on the top or side wall of each area to monitor the indoor air temperature and humidity in real time. The surface temperature sensor is used to monitor the radiant surface temperature. The main unit, as the cold source core of the water circulation system, extracts the return water from the second water outlet of the water tank, cools it, and then returns it to the water tank through the first water inlet, and then supplies the refrigeration water through the first water outlet. The first water pump is set between the first water outlet of the water tank and the water supply pipe to ensure uniform flow distribution. The second water pump drives the return water into the main unit refrigeration cycle. The pure water machine is connected to the second water inlet of the water tank and is used to soften and supply municipal water to the water tank.

[0075] By detecting temperature and humidity, the system achieves accurate control of the radiant surface temperature, effectively avoiding the occurrence of condensation. In addition, by setting two water pumps, the first water pump is responsible for pumping water from the water tank for direct use by users; the second water pump is responsible for pumping water from the water tank as the source of chilled water for the main unit. Through the independent operation of these two water pumps, the system can significantly reduce the frequent start-stop times of the main unit, which not only helps to extend the service life of the main unit but also effectively achieves energy-saving effects.

[0076] Figure 5 This is a flowchart of the air conditioning system provided in this embodiment. As Figure 5 shown. The execution subject of this embodiment is, for example, the controller of the air conditioning system, and the implementation process of the air conditioning system will be described in detail. The air conditioning system provided in this embodiment includes:

[0077] S101: Determine the dew point temperature according to the air temperature, air humidity, and radiant surface temperature.

[0078] Among them, the air temperature is a physical quantity indicating the cold and heat degree of the indoor environment, usually measured in degrees Celsius. The air temperature reflects the intensity of the thermal motion of air molecules and can be directly measured by a dry bulb thermometer.

[0079] The air humidity is used to indicate the amount of water vapor in the air, usually expressed as relative humidity. Relative humidity is the percentage of the actual water vapor content to the maximum possible water vapor content at the same temperature, reflecting the dryness and wetness of the air.

[0080] The dew point temperature is the critical temperature value for judging whether the air reaches the saturation state. When the surface temperature of the radiation device is lower than the dew point temperature, the water vapor in the air will condense into liquid water, resulting in condensation.

[0081] The radiant surface temperature is used to indicate the temperature of the surface of the radiation device in any area. The radiation device includes the ceiling and the wall and floor.

[0082] The purpose of this step is to calculate the dew point temperature in the current air state by real-time monitoring of the air temperature, air humidity, and radiant surface temperature in each area, serving as the basis for judging the condensation risk.

[0083] It can be understood that, first of all, the air temperature is a physical index characterizing the cold and heat degree of the environment, reflecting the average kinetic energy of air molecules, and its value directly affects the human thermal comfort and cooling demand.

[0084] Secondly, the air humidity reflects the saturation of the water vapor content in the air, expressed as a percentage of relative humidity, and its value is positively correlated with the condensation risk.

[0085] In addition, the radiation surface temperature reflects the actual temperature conditions of the upper surface of the radiation device in each area.

[0086] Therefore, calculating the dew point temperature based on the air temperature, air humidity, and radiation surface temperature in each area is essentially constructing an early warning line for the condensation risk. When the radiation surface temperature is lower than this dew point temperature, the condensation condition will be triggered.

[0087] Optionally, the present application provides a calculation formula for determining the dew point temperature based on the air temperature and air humidity, including:

[0088]

[0089] Wherein, Td represents the dew point temperature, a represents a constant, for example, it can be 17.27, b represents a constant, for example, it can be 237.7, T represents the air temperature, and RH represents the relative humidity.

[0090] For example, if the air temperature in a certain area is 15 degrees Celsius and the relative humidity is 80%, then when a is 12.27 and b is 237.7, the dew point temperature Td of this area can be determined to be approximately 18 degrees Celsius.

[0091] S102: When the radiation surface temperature in any area is less than the dew point temperature, control the three-way valve in any area to connect the replacement pipe with the water inlet of the refrigeration pipeline in any area, and control the two-way valve to close.

[0092] Wherein, the purpose of comparing the radiation surface temperature and the dew point temperature in any area in this step is to determine whether condensation will occur on the surface of the radiation device in this area.

[0093] It can be understood that, first of all, the radiation surface temperature is used to characterize the heat exchange state between the radiation device (such as the ceiling or wall and floor) and the indoor environment, which helps the system judge whether condensation occurs on the radiation surface.

[0094] Secondly, the dew point temperature refers to the temperature at which water vapor in the air reaches the saturation state under a certain air pressure. When the radiation surface temperature is lower than the dew point temperature, it means that water vapor in the air may condense into water droplets on the surface of the radiation device, and condensation occurs on the surface of the radiation device.

[0095] Therefore, by comparing the magnitude relationship between the radiant surface temperature and the dew point temperature, it is possible to determine whether condensation will occur on the surface of the radiation device. Once the radiant surface temperature is less than the dew point temperature, it indicates that condensation may occur on the radiant surface in this area. To avoid damage to the radiation device caused by condensation, the system will control the three-way valve to change the water flow direction, so that the water flow that originally entered the radiation device from the water supply pipe will be switched to enter from the return pipe, and the water in the return pipe will flow backward and re-enter the water tank through the replacement pipe for heating. In this way, the temperature of the surface of the radiation device can be quickly increased, effectively preventing the occurrence of condensation.

[0096] For example, if the dew point temperature in a certain area is 14 degrees Celsius and the radiant surface temperature is 9 degrees Celsius, it indicates that the radiant surface temperature in this area is less than the dew point temperature in this area.

[0097] S103: When the radiant surface temperature in each area is greater than or equal to the dew point temperature, control the water supply pipe to communicate with the water inlet of the refrigeration pipeline in each area through the three-way valve in each area, and control the two-way valve to open.

[0098] Among them, the purpose of judging whether the radiant surface temperature in each area is greater than or equal to the dew point temperature is to determine whether it is necessary to adjust the flow direction of the three-way valve and control the on-off state of the two-way valve.

[0099] If the radiant surface temperature in each area is greater than or equal to the dew point temperature, it indicates that there is no need to adjust the flow direction of the three-way valve and control the on-off state of the two-way valve. At this time, it is necessary to control the water supply pipe to communicate with the water inlet of the refrigeration pipeline in each area through the three-way valve in each area, and control the two-way valve to open.

[0100] If the radiant surface temperature in any area is less than the dew point temperature, it indicates that it is necessary to adjust the direction of the three-way valve and control the two-way valve to close. At this time, it is necessary to control the replacement pipe to communicate with the water inlet of the refrigeration pipeline in any area through the three-way valve in any area, and control the two-way valve to close.

[0101] It can be understood that if the radiant surface temperature of all areas is greater than or equal to the dew point temperature, it means that the current temperature state of the system is safe and no adjustment is required. In this case, the system will maintain the connection between the water supply pipe and the water inlet of the refrigeration pipeline in each area through the three-way valve in each area, and at the same time open the two-way valve to maintain normal refrigeration effect.

[0102] However, if the radiant surface temperature in any area is lower than the dew point temperature, it indicates that there is a risk of condensation in that area, and immediate action is required at this time. The system will change the flow direction through the three-way valve in that area, connecting the replacement pipe to the water inlet of the refrigeration pipeline in that area, and closing the two-way valve at the same time. The purpose of doing this is to let the water in the return pipe flow back to the water tank for heating again to raise the temperature of the radiant surface and prevent condensation from occurring.

[0103] For example, if the radiant surface temperature in Area A is 10 degrees Celsius, while the dew point temperature in this area is 14 degrees Celsius; at the same time, the radiant surface temperature in Area B is 16 degrees Celsius, and its dew point temperature is also 14 degrees Celsius. Based on this information, the system will first determine that the radiant surface temperature in Area A is lower than the dew point temperature in this area, indicating that there is a risk of condensation in Area A. On the contrary, the radiant surface temperature in Area B is higher than its dew point temperature, indicating that the temperature state in Area B is safe.

[0104] Therefore, the system will change the flow direction through the three-way valve in Area A, connecting the replacement pipe to the water inlet of the refrigeration pipeline in this area, and closing the two-way valve in this area to prevent condensation from occurring. For Area B, since the temperature state is safe, the system will keep the three-way valve controlling the water supply pipe connected to the water inlet of the refrigeration pipeline in this area and control the two-way valve to open to maintain the normal refrigeration effect.

[0105] S104: After a preset time when the replacement pipe is controlled to be connected to the water inlet of the refrigeration pipeline in any area through the three-way valve in any area and the two-way valve is controlled to be closed, control the water supply pipe to be connected to the water inlet of the refrigeration pipeline in any area through the three-way valve in any area and control the two-way valve to open.

[0106] Among them, the preset time can be, for example, 1 min, or it can also be 30 S. This application does not make special restrictions on this.

[0107] The purpose of this step is to restore the normal refrigeration function on the premise of ensuring no condensation.

[0108] It can be understood that after connecting the replacement pipe to the water inlet of the refrigeration pipeline through the three-way valve in any area and closing the two-way valve in this area, the system will wait for a preset period of time. This waiting time is to ensure that the water in the return pipe can fully flow back to the water tank for heating, thereby effectively raising the temperature of the radiant surface and preventing the occurrence of condensation.

[0109] Once the preset time ends and the temperature of the radiant surface has been raised sufficiently, the system will restore the normal refrigeration mode through the switching of the three-way valve and the two-way valve. In this way, the system can not only prevent condensation but also continue to provide refrigeration effect on the premise of ensuring safety.

[0110] The air conditioning system provided by this application first determines the dew point temperature according to the current air temperature, air humidity, and radiant surface temperature. Next, if the radiant surface temperature of any area is detected to be lower than the dew point temperature, the system will immediately connect the replacement pipe to the water inlet of the refrigeration pipeline through the three-way valve in that area and close the two-way valve to prevent condensation. On the contrary, if the radiant surface temperatures of all areas are greater than or equal to the dew point temperature, the system will maintain the normal refrigeration mode, connect the water supply pipe to the water inlet of the refrigeration pipeline through the three-way valve in each area, and open the two-way valve. Finally, after waiting for a preset time, the adjusted three-way valve is controlled to switch again, and the two-way valve arranged on the return water pipe is controlled to open. This method realizes the local countercurrent effect by pre-installing the three-way valve and the replacement pipe, not only effectively avoiding the condensation phenomenon on the radiant surface, but also solving the problem of long time consumption caused by relying on the room's own temperature rise to increase the cold radiant surface temperature in the existing method.

[0111] So far, the technical solutions of this application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this 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 recorded 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 embodiments of this application.

Claims

1. An air conditioning system, characterized in that, Including: A controller, a water tank, a water supply pipe, a water return pipe, a replacement pipe, a three-way valve, and a first two-way valve; The first water outlet of the water tank is connected to the water supply pipe, and the water flowing out of the first water outlet of the water tank is chilled water; the water inlet of the refrigeration pipeline in each area is respectively connected to the water supply pipe and the replacement pipe through the three-way valve in each area; the water return pipe is connected to the water outlet of the refrigeration pipeline in each area and is connected to the first water return port of the water tank, and the two-way valve is arranged on the water return pipe; the controller is electrically connected to the three-way valve and the two-way valve respectively; The controller is configured to, when the radiant surface temperature in any area is less than the dew point temperature, control the replacement pipe to communicate with the water inlet of the refrigeration pipeline in the any area through the three-way valve in the any area, and control the two-way valve to close.

2. The air conditioning system according to claim 1, wherein, The controller is further configured to, When the radiant surface temperature in each area is greater than or equal to the dew point temperature, control the water supply pipe to communicate with the water inlet of the refrigeration pipeline in each area through the three-way valve in each area, and control the two-way valve to open.

3. The air-conditioning system according to claim 1, wherein The controller is further configured to, after a preset time when the replacement pipe is controlled to communicate with the water inlet of the refrigeration pipeline in any area through the three-way valve in the any area and the two-way valve is controlled to close, control the water supply pipe to communicate with the water inlet of the refrigeration pipeline in the any area through the three-way valve in the any area, and control the two-way valve to open.

4. The air conditioning system according to any one of claims 1-3, characterized in that, Further including: An air temperature and humidity sensor and a surface temperature sensor arranged in each area; the controller is electrically connected to the three-way valve and the two-way valve respectively; The surface temperature sensor is configured to detect the radiant surface temperature of the area, and the air temperature and humidity sensor is configured to detect the air temperature and air humidity of the area; The controller is further configured to determine the dew point temperature according to the air temperature, the air humidity, and the radiant surface temperature.

5. The air conditioning system according to any one of claims 1 to 3, characterized in that, The replacement pipe is connected to the second water return port of the water tank.

6. The air-conditioning system according to any one of claims 1-3, characterized in that, Further including a main unit; the controller is electrically connected to the main unit; The water at the second water outlet of the water tank is chilled by the main unit and then flows back to the first water inlet of the water tank, and then flows out from the first water outlet of the water tank to the water supply pipe.

7. The air-conditioning system according to any one of claims 1 to 3, characterized in that, Further including a first water pump; the controller is electrically connected to the first water pump; The first water pump is arranged between the first water outlet of the water tank and the water supply pipe.

8. The air conditioning system according to claim 6, characterized in that, Further including a second water pump; the controller is electrically connected to the second water pump; The second water pump is arranged between the second water outlet of the water tank and the main unit.

9. The air conditioning system according to any one of claims 1-3, characterized in that, Further including: A second two-way valve; the controller is electrically connected to the second two-way valve; The second two-way valve in each area is arranged between the water return pipe and the water outlet of the refrigeration pipeline in each area.

10. The air conditioning system according to any one of claims 1-3, characterized in that, Further including: A pure water machine; the pure water machine is connected to the second water inlet of the water tank; the pure water machine is used to soften the municipal water supply and supply water to the water tank.

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