Gravity flow type radiant panel structure and air conditioning system

Abstract

The invention provides a gravity flow type radiant panel structure and an air conditioning system, and belongs to the technical field of air conditioners. The problems that an existing radiant panel air conditioner is low in radiation efficiency, large in installation area, high in pipeline water pressure, complex in installation procedure and large in pipeline connector number are solved. The gravity flow type radiant panel structure comprises a heat exchange module, a water outlet pipe, a water inlet pipe and a flowing area. In the invention, the gravity flow type radiant panel structure is modularly and integrally designed, so that the combination and installation efficiency of the radiant panel structure on a subsequent construction site can be remarkably improved while standardized and large-scale manufacturing is realized, complicated field installation procedures do not need to be implemented, and the construction quality can be ensured not to be influenced by other procedures; the installation work amount can be greatly reduced, and the leakage probability of pipelines, valves and accessories in the using process is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and relates to a gravity flow radiation panel structure and an air conditioning system. Background Art

[0002] Existing three-constant systems, five-constant systems, and floor heating all utilize cooling / heating medium circulation piping arranged on the ceiling, walls, and floor of a room. The cooling / heating medium is then recirculated through these piping. The cooling / heating energy of the cooling / heating medium is then exchanged directly with the human body and the surrounding environment through convection and radiation (primarily radiation), achieving cooling / heating in the room. This type of radiant air conditioning system operates as a whole, 365 days a year, with human health and comfort as its design goal. A single system addresses cooling, heating, fresh air, purification, humidification, and dehumidification, maintaining constant temperature, humidity, and oxygen levels. It is currently the most comfortable and energy-efficient air conditioning method available.

[0003] Existing radiant air conditioners that lay pipes on the walls of rooms have the following defects: 1. Multiple cold / hot medium circulation pipes need to be arranged, and their on-site laying or connection is relatively arbitrary. The installation is complicated and difficult to standardize, resulting in difficulty in ensuring quality; 2. The product is exposed to the outside and affects its appearance, so secondary decoration is required on its outer surface, resulting in a long construction period. The secondary decoration will cause damage to the product. At the same time, the secondary decoration will cause slow dissipation of cold / heat, serious lag in the cold / heat effect, and difficulty in quickly regulating the room temperature; 3. Existing radiant air conditioners use a large water pressure to apply to the entire system to make the water medium circulate in the radiant air conditioner circulation pipe or radiation panel, so that the circulation pipe, radiation panel, etc. need to withstand a large water pressure, which may cause the pipes to rupture or leak. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a modular gravity flow radiation panel structure and an air conditioning system that can be used as a wall.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a gravity flow radiation plate structure, comprising: a plurality of heat exchange modules arranged from bottom to top, each of the heat exchange modules being a hollow flat plate structure, wherein the outlet pipe of the upper layer of heat exchange modules is connected to the inlet pipe of the lower layer of heat exchange modules, and the outlet pipe and inlet pipe of each heat exchange module are arranged opposite to each other, each heat exchange module is provided with a flow area, and the water medium in two adjacent flow areas flows in opposite directions.

[0006] In the above-mentioned gravity flow radiation plate structure, each of the heat exchange modules is provided with a first reversing area connected to the water inlet pipe and a second reversing area connected to the water outlet pipe. The flow area is located between the first reversing area and the second reversing area, and the bottom of the first reversing area and the top of the second reversing area are both connected to the flow area.

[0007] In the above-mentioned gravity flow radiation plate structure, each of the heat exchange modules includes a bottom plate, two side plates, a top plate and two panel plates for forming a hollow flat plate structure, wherein the bottom plate of the upper layer of heat exchange module is connected to or integrally formed with the top plate of the lower layer of heat exchange module.

[0008] In the above-mentioned gravity flow radiation plate structure, a plurality of transversely arranged diverter plates are arranged in the flow area, each diverter plate is parallel to each other, a first gap is provided between each diverter plate and the first reversing area, and a second gap is provided between each diverter plate and the second reversing area.

[0009] In the above gravity flow radiation plate structure, a first baffle is provided on the side of the first reversing area close to the flow area, one end of the first baffle is connected to the top plate, and a water inlet is provided between the other end of the first baffle and the bottom plate.

[0010] In the above gravity flow radiation plate structure, a second partition is provided on the side of the second reversing area close to the flow area, one end of the second partition is connected to the bottom plate, and a water outlet is provided between the other end of the second partition and the top plate.

[0011] In the above-mentioned gravity flow radiation plate structure, the internal top of the heat exchange module is also provided with a flat pressure area connected to the flow area, the top of the first reversing area is provided with an air cavity connected to the first reversing area, the air cavity is located in the flat pressure area, and the first partition is provided with an air vent for connecting the air cavity and the flow area.

[0012] In the above-mentioned gravity flow radiation plate structure, each of the heat exchange modules has a plurality of water inlet pipes, wherein the water inlet pipe located on the top layer is communicated with the air cavity.

[0013] The gravity flow radiation plate structure further includes a deflector provided on one side of the heat exchange module, wherein the deflector connects the outlet pipe of the upper layer of heat exchange module with the water inlet pipe of the lower layer of heat exchange module.

[0014] In the above-mentioned gravity flow radiation plate structure, the deflector, the first reversing area and the second reversing area are all filled with steel mesh.

[0015] In the above-mentioned gravity flow radiation plate structure, a ventilation pipe is provided on the heat exchange module located on the top layer, and the ventilation pipe is connected to the flat pressure area. The ventilation pipe is provided with a filter connected to the external air, and the height of the filter is higher than or equal to the height of the flat pressure area.

[0016] In the above-mentioned gravity flow radiation plate structure, it also includes a condensate collection area arranged below the heat exchange module, the condensate collection area includes a collection tank, at least one condensate pump is provided in the collection tank, and a condensate pipe is provided on the condensate pump, which is connected to one of the deflectors.

[0017] In the above-mentioned gravity flow radiation plate structure, columns are provided on both sides of the heat exchange module, and the water inlet pipe and the water outlet pipe are respectively located in the corresponding columns.

[0018] In the above-mentioned gravity flow radiation plate structure, an insulation plate is provided on one side of the heat exchange module, the water inlet pipe of the heat exchange module located on the uppermost layer is connected to a water supply device, and the water outlet pipe of the heat exchange module located on the lowermost layer is connected to a water return device. An insulation block is provided in the column, and the insulation block wraps the water return device and the water supply device.

[0019] In the above-mentioned gravity flow radiation plate structure, the water supply device is connected to a water supply pipe, the water return device is connected to a return pipe, and a power module is provided between the water supply pipe and the return pipe. The power module includes a circulating water pump and a heat exchanger provided on the return pipe. The heat exchanger is connected to the water supply pipe. The return pipe is provided with a first valve body and a third valve body. The first valve body and the third valve body are respectively located on both sides of the circulating water pump, and the third valve body is located between the circulating water pump and the heat exchanger. The return pipe is provided with a water purifier between the circulating water pump and the third valve body, and the water purifier is provided with a tenth valve body.

[0020] In the above-mentioned gravity flow radiation plate structure, a second valve body and a fourth valve body are provided on the water supply pipe, the second valve body is located on the side close to the water supplier, the third valve body and the fourth valve body are both located on the side of the heat exchanger close to the heat exchange module, a regulating tank is provided on the return water pipe, an exhaust pipe connected to the regulating tank is provided on the water supply pipe, a ninth valve body is provided on the exhaust pipe, a water supply pipe connected to the return water pipe is provided on the regulating tank, an eighth valve body is provided on the water supply pipe, a regulating water pipe is provided on the regulating tank, and a fifth valve body is provided on the regulating water pipe.

[0021] An air conditioning system comprises: a cold / heat source structure and a gravity flow type radiation panel structure according to any one of claims 1 to 3, wherein the cold / heat source structure is used to provide a cold / heat source for the gravity flow type radiation panel structure.

[0022] An air conditioning system comprises: a chilled water pump, an air conditioning main unit, and a gravity flow radiation panel structure according to any one of claims 1 to 3, wherein the chilled water pump is connected to the air conditioning main unit, a return water riser is provided at the water inlet of the chilled water pump, and a water supply riser is provided at the water outlet of the air conditioning main unit, the water supply riser is provided with a plurality of water supply mains, and the return water riser is provided with the same number of return water mains as the water supply mains, and a plurality of radiation panel structures are provided between each of the water supply mains and the corresponding return water mains, and the radiation panel structures are respectively connected to the water supply main and the return water main via a water supply branch pipe and a return water branch pipe.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the gravity flow radiation panel structure is modularized and integrated, which can significantly improve the assembly and installation efficiency of the radiation panel structure at the subsequent construction site while achieving standardized and large-scale manufacturing. It does not require a complex on-site installation procedure and can also ensure that the construction quality is not affected by other processes. 2. In this invention, the interior of the gravity flow radiant panel structure is filled with cold / hot pure water (leaving a small air layer at the top), and heat is directly radiated to the room through the external metal panel. Its radiation efficiency is greatly improved compared with other existing radiant panels, which can greatly reduce the installation area and installation workload of the radiant panel; 3. In practical applications, the gravity flow radiation panel structure can be used directly as a wall, without the need for additional decoration of the radiation panel structure, which can save decoration and renovation costs. Secondly, the gravity flow radiation panel structure can be used directly as a wall of a house, which can reduce the time and cost of house construction, and can also reduce the thickness of the wall, thereby increasing the usable area of ​​the house. 4. When the gravity flow radiation plate structure of the present invention is in operation, the water medium in the heat exchange module flows naturally from the higher water level inlet to the lower water level outlet under the action of gravity without any external pressure. The water medium in the heat exchange module has only extremely low hydrostatic pressure, so the thickness of the metal plate of the heat exchange module shell can be minimized, thereby saving a large amount of metal material and eliminating the risk of leakage. 5. After the water medium in the heat exchange module enters the flow area, it flows naturally in the same way from the water inlet with a higher water level to the water outlet with a lower water level in each flow channel separated by the diverter plate. Since the water medium flowing through each flow channel has the same flow distance and the same resistance, the flow rate and flow rate are the same, thus ensuring the uniform temperature of the upper and lower parts of the heat exchange module; 6. The water flow in the entire radiation panel structure composed of multiple individual radiation panels is transformed into a "bow" shape after several turns, which can effectively prolong the retention time of the circulating water in the heat exchange module, so that the heat exchange module can achieve long-term radiation cooling / heating of the indoor space through its metal surface; 7. During the continuous circulation of water between the gravity flow radiation plate structure and the heat exchanger, the water flowing out of the radiation plate still has residual temperature. This allows the water to use this residual temperature as a basis for heat exchange in the heat exchanger. This not only improves the heat exchange efficiency, but also enables the reuse of residual temperature, thereby achieving the purpose of energy saving. 8. A certain amount of water medium is stored in the radiation panel structure, and water has a large specific heat capacity. It can release cold and heat to the room for a certain period of time when the cold and hot sources are turned off, thereby extending the shutdown time of the cold and hot sources to avoid frequent startup affecting the life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the gravity flow radiation panel in Example 1.

[0025] Figure 2 It is a structural diagram of a single heat exchange module without wire mesh.

[0026] Figure 3 yes Figure 2 Enlarged view at point A.

[0027] Figure 4 It is a structural diagram of a single heat exchange module equipped with a wire mesh.

[0028] Figure 5 It is a three-dimensional diagram of a single heat exchange module.

[0029] Figure 6 It is a schematic diagram of the power module structure.

[0030] Figure 7 This is a diagram showing the combination of the power module and the cold / heat source structure in the second embodiment.

[0031] Figure 8 yes Figure 1 Cross-sectional view at BB.

[0032] Figure 9 It is a structural diagram of the air-conditioning system in Example 3.

[0033] In the figure, the heat exchange module 100, the outlet pipe 110, the inlet pipe 120, the flow area 130, the diverter plate 131, the first gap 132, the second gap 133, the first reversing area 140, the first partition plate 141, the vent 141a, the water inlet 142, the first water level line 143, the second reversing area 150, the second partition plate 151, the water outlet 152, the water level sensor 153, the bottom plate 160, the side plate 161, the top plate 162, the panel 163, the flattening area 170, the air cavity 171, the second water level line 172, the deflector 180, the vent pipe 181, the filter 181a, the wire mesh 190, the condensate collection area 200, the water collection tank 210, the condensate pump 220, the condensate pipe 230, the column 300, the insulation block 310, and the water return device 320 , return pipe 321, check valve 322, water supplier 330, interface 331a, water supply pipe 331, insulation board 400, power module 500, circulating water pump 510, heat exchanger 520, first valve body 530, third valve body 540, water purifier 550, tenth valve body 551, second valve body 560, fourth valve body 570, regulating water pipe 580, fifth valve body 581, regulating tank 590, eighth valve body 591, exhaust pipe 592, ninth valve body 593, make-up water pipe 594, chilled water pump 600, return water riser 610, return water main 611, seventh valve body 611a, air conditioning main equipment 700, water supply riser 710, water supply main 711, sixth valve body 711a, water supply branch pipe 720, return water branch pipe 730, temperature control structure 800. DETAILED DESCRIPTION

[0034] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0035] Example 1 like Figure 1 — Figure 3 and Figure 5 As shown, the gravity flow radiation plate structure of the present invention includes a heat exchange module 100 , a water outlet pipe 110 , a water inlet pipe 120 and a flow area 130 .

[0036] A plurality of heat exchange modules 100 are stacked from bottom to top, and each of the heat exchange modules 100 is a hollow flat plate structure, wherein the outlet pipe 110 of the upper heat exchange module 100 is connected to the water inlet pipe 120 of the lower heat exchange module 100, that is, the outlet pipe 110 of the upper heat exchange module and the water inlet pipe 120 of the lower heat exchange module are on the same side, and the outlet pipe 110 and the water inlet pipe 120 of each heat exchange module 100 are arranged oppositely, and each heat exchange module 100 is provided with a flow area 130, and the water medium in each flow area 130 flows from the water inlet 142 to the water outlet 152. Because the outlet pipe 110 and the water inlet pipe 120 of the two adjacent modules are on the same side, the water medium in the two adjacent flow areas 130 flows in opposite directions. When the gravity flow radiation plate air-conditioning system is working, the water medium is continuously The water medium enters the heat exchange module 100 through the water inlet pipe 120 of the top heat exchange module 100, then flows along the evenly distributed flow channels in the flow area 130 to the water outlet 152, and then overflows downward to the water outlet pipe 110. The water medium will then enter the next heat exchange module 100 and continue to flow between the water inlet 142 and the water outlet 152 of the next heat exchange module 100 in the same flow state as the previous heat exchange module 100. The flow direction of the water medium in the flow channels of the flow area 130 is opposite to the flow direction of the water medium in the flow channels of the previous heat exchange module 100. In this way, the water flow of the entire radiation plate structure will flow in a "bow" shape, thereby effectively extending the flow time of the water medium in the heat exchange module 100, allowing the heat exchange module 100 to radiate cooling / heating to the indoor space for a longer time and with uniform intensity through its surface. Since multiple heat exchange modules 100 can be combined to form a whole wall panel with a certain thickness and strength, the gravity flow radiation panel structure can be used directly as the wall of a house, thereby reducing the time for house construction and the ground area occupied by the wall.

[0037] Each heat exchange module 100 is provided with a first reversing area 140 connected to the water inlet pipe 120 and a second reversing area 150 connected to the water outlet pipe 110. The flow area 130 is located between the first reversing area 140 and the second reversing area 150, and the bottom of the first reversing area 140 and the top of the second reversing area 150 are both connected to the flow area 130. This allows the water medium in the first reversing area to smoothly enter the flow area 130 from the bottom. Because the top of the second reversing area 150 is connected to the flow area 130, the water medium must reach the water outlet 152 before overflowing. This automatically maintains the water medium in the flow area 130 at the highest water level, thereby maximizing the radiation area, i.e., the maximum radiation capacity.

[0038] Each of the heat exchange modules 100 includes a bottom plate 160, two side plates 161, a top plate 162 and two panels 163 for forming a hollow flat plate structure, wherein the bottom plate 160 of the upper layer of heat exchange module 100 is connected to or integrally formed with the top plate 162 of the lower layer of heat exchange module 100.

[0039] Specifically, when the bottom plate 160 of the upper heat exchange module 100 and the top plate 162 of the lower heat exchange module 100 are detachably connected, each heat exchange module can be made into an independent unit, and the heat exchange modules 100 can be mass-produced to achieve standardized and large-scale manufacturing, thereby significantly improving the assembly efficiency of the radiation plate structure at the subsequent construction site; when the bottom plate 160 of the upper heat exchange module 100 and the top plate 162 of the lower heat exchange module 100 are integrally formed, or in other words, when the bottom plate 160 of the upper heat exchange module 100 and the top plate 162 of the lower heat exchange module 100 are integrally formed, When the top plate 162 of the thermal module 100 is made of the same plate, the radiation panel structure can be directly manufactured in the factory and transported to the construction site by means of transportation. In this way, the radiation panel structure can be avoided from being assembled on the construction site, which can also shorten the construction period. Secondly, the radiation panel structure can be standardized and manufactured on a large scale. In addition, when the top plate and the bottom plate are integrally formed, multiple side panels on the same side of the radiation panel can be integrated into a single integral structure. Similarly, multiple panels on the same side of the radiation panel can be integrated into a single integral structure.

[0040] A plurality of transversely arranged diverter plates 131 are provided in the flow area 130. Each diverter plate 131 is parallel to each other and evenly distributed in the flow area 130, and serves to connect, support and fix the two panels (163), and to guide the water medium flowing therethrough. Furthermore, a first gap 132 is provided between each of the diverter plates 131 and the first reversing area 140, and a second gap 133 is provided between each of the diverter plates 131 and the second reversing area 150. A flow channel (not marked in the figure) is formed between two adjacent diverter plates. A first partition plate 141 is provided on a side of the first reversing area 140 close to the flow area 130. One end of the first partition plate 141 is connected to the top plate 162, and a water inlet 142 is provided between the other end of the first partition plate 141 and the bottom plate 160. The second reversing area 150 is close to the side of the flow area 130. A second partition 151 is provided, one end of the second partition 151 is connected to the bottom plate 160, and a water outlet 152 is provided between the other end of the second partition 151 and the top plate 162. When the gravity flow radial plate air conditioning system is working, the water medium circulates continuously through the water inlet pipe 120 into the first reversing area 140, and under the action of gravity, flows toward the bottom water inlet 142, and then flows from the first gap through each flow channel to the second gap 133. The second gap 133 collects the water medium of each flow channel and flows upward to the water outlet 152, and overflows toward the bottom of the second reversing area 150 under the action of gravity, flows to the outlet pipe 110 and flows through the deflector 180 to the first reversing area 140 of the next layer. The specific path of the water medium from the water inlet 142 through each flow channel to the water outlet 152 is: water inlet 142--corresponding first gap 132 -- The entire horizontal flow path section -- the second gap 133 -- the water outlet 152, the total flow rate of each flow path is equal (same formula). Therefore, under the conditions of the same roughness and size of the wall panels of each flow path, the resistance of the water medium flowing through each flow path is also the same, that is, the flow rate and flow rate of the water medium flowing through each flow path are the same, so that the radiation panel has the best effect of uniform surface temperature.

[0041] The top of the heat exchange module 100 is also provided with a pressure-equalizing area 170 that is connected to the flow area 130. The air layer in the pressure-equalizing area 170 can directly flow to the outside atmosphere. In this way, the flow area 130 is connected to the outside atmosphere, so that no additional pressure such as positive pressure or negative pressure is formed in the heat exchange module, and the water medium always circulates under the original static pressure state.

[0042] Furthermore, based on theoretical calculations and measured data, a first water level line 143 is provided at the top of the first reversing zone 140. When the actual water medium flow rate reaches the maximum design flow rate, the actual water surface in the first reversing zone 140 overlaps with the first water level line 143. An air cavity 171 communicating with the first reversing zone 140 is provided at the top of the first reversing zone 140. Specifically, the air cavity 171 is located in the first reversing zone 140 and above the first water level line. A vent 141a for communicating the air cavity 171 with the flow zone 130 is provided on the first partition plate 141. The vent 141a is located above the first water level line 143. In this way, the flow zone 130 is connected to the outside atmosphere through the vent 141a and the air cavity 171, thereby achieving the purpose of maintaining the same air pressure inside and outside the heat exchange module 100.

[0043] According to theoretical calculations and measured data, a second water level line (172) is present at one end of the flow zone 130 close to the first reversing zone 140. When the actual water medium flow rate reaches the maximum design flow rate, the actual water surface at the starting end of the flow zone 130 overlaps with the second water level line (172). The distance between the first water level line (143) and the bottom plate (160) is greater than the distance between the second water level line (172) and the bottom plate (160). The distance between the vent hole (141a) and the bottom plate (160) is greater than the distance between the first water level line (143) and the bottom plate (160). The distance between the second water level line 172 and the bottom plate 160 is greater than the distance between the top of the second partition 151 and the bottom plate 160. Therefore, under the action of gravity, the water medium flows from the first reversing zone 140 to the flow zone 130 and then to the water outlet 152 at the top of the second partition 151 and then flows into the second reversing zone 150.

[0044] According to the different design water medium flow rates of different models of heat exchange modules 100, the number of water inlet pipes 120 of each heat exchange module 100 is multiple, wherein the water inlet pipe 120 located on the top layer is connected to the air cavity 171. The gravity flow radiation plate structure of the present invention further includes: a deflector 180 provided on one side of the heat exchange module 100, wherein the deflector 180 connects the water outlet pipe 110 of the upper layer of heat exchange module 100 with the water inlet pipe 120 of the lower layer of heat exchange module 100, and the water inlet pipe 120 and the water outlet pipe 110 of each heat exchange module are respectively provided. Placed on the two side panels 161, the height of the water inlet pipe 120 is higher than the height of the water outlet pipe 110. In this way, the water medium of the upper layer will pass through the water outlet pipe 110, the deflector 180 of the upper layer heat exchange module, and the water inlet pipe 120 of the lower layer heat exchange module, and finally flow into the heat exchange module of the lower layer. In addition, the air in the air cavity 171 and the flat pressure area 170 of each heat exchange module 100 can be interconnected up and down through the top water inlet pipe 120, the deflector 180, and the water outlet pipe 110 of the upper layer heat exchange module 100. The deflector 180, first reversing area 140, and second reversing area 150 are all filled with steel mesh 190. Water flows from top to bottom into these deflectors 180, first reversing area 140, and second reversing area 150. Water flowing freely from a height generates a certain amount of noise. By pulling the steel wool into a loose steel mesh and filling it into the deflector 180, first reversing area 140, and second reversing area 150, the water will slide along the fine steel wire, thereby eliminating noise generation. Furthermore, the steel mesh can also be filled in the flow area. When a gravity-flow radiant panel air conditioner is used as a partition wall, the flat and spiral surface of the steel wire will scatter indoor noise in all directions into the water medium, effectively reducing noise.

[0045] The heat exchange module 100 located on the top layer is provided with a ventilation pipe 181, which is connected to the equalizing area 170. The ventilation pipe 181 is provided with a filter 181a connected to the outside air. When the gravity flow radiant panel air conditioning system is working, the water medium volume inside the heat exchange module 100 will expand and contract due to the continuous adjustment and change of temperature. The air in the equalizing area is discharged to the outside through the ventilation pipe due to the positive pressure generated by the water medium, or the air is sucked in from the outside due to the negative pressure generated by the contraction of the water medium volume, so that the air pressure in each equalizing area 170 is the same as the atmospheric pressure, thereby achieving the purpose of not generating additional pressure on the water medium in the heat exchange module 100 due to its temperature change. Furthermore, the height of the filter 181a is higher than or equal to the height of the equalizing area 170 to prevent the water medium in the heat exchange module 100 from overflowing through the filter 181a, and the filter 181a filters the incoming and outgoing air to keep the distilled water in the heat exchange module 100 clean and pollution-free.

[0046] The gravity flow radiation plate structure of the present invention also includes: a condensation water collection area 200 provided below the heat exchange module 100. Specifically, the condensation water collection area is located directly below the heat exchange module 100, and the length of the condensation water collection area 200 is greater than the length of the heat exchange module 100, and the width of the condensation water collection area 200 is greater than the width of the heat exchange module 100. Therefore, when the panel temperature of the heat exchange module 100 is lower than the critical temperature and condensation water is generated, the generated condensation water will slide into the condensation water collection area under the action of gravity.

[0047] Furthermore, the condensate collection area 200 includes a water collection tank 210, in which at least one condensate pump 220 is provided. The condensate pump 220 is provided with a condensate pipe 230, and the condensate pipe 230 is connected to one of the deflectors 180. When the water collection tank 210 collects a certain amount of condensate, the condensate pump 220 is turned on to pump the condensate in the water collection tank into the deflector 180 through the condensate pipe 230, mix it with the water medium and enter the heat exchange module 100, thereby realizing the recovery and utilization of the cold energy carried by the condensate.

[0048] Columns 300 are provided on both sides of the heat exchange module 100, wherein both ends of the heat exchange module 100 are connected to the corresponding columns 300, the water inlet pipe 120 and the water outlet pipe 110 are respectively located in the corresponding columns 300, and an insulation plate 400 is provided on one side of the heat exchange module 100. The water inlet pipe 120 of the heat exchange module 100 located on the top layer is connected to a water supply device 330, and the water outlet pipe 110 of the heat exchange module 100 located on the bottom layer is connected to a water return device 320. An insulation block 310 is provided in the column 300, and the insulation block 310 wraps the water return device 320 and the water supply device 330. By setting the insulation plate 400, one side of the heat exchange module 100 can be Insulation is performed, that is, to prevent the cold air or hot air on the surface of the heat exchange module 100 from escaping into the air through the side close to the insulation plate 400. Secondly, through the setting of the insulation block 310, the deflector 180, the water inlet pipe 120, the water outlet pipe 110, the return water device 320 and the water supply device 330 can also be insulated, thereby preventing the water supply device 330 and the return water device 320 from temperature dissipating during the water supply process of the water supply device 330 and the return water device 320 during the water return process; further, a check valve 322 is provided between the return water device 320 and the water outlet pipe 110, and the check valve can prevent the water medium flowing out of the outlet pipe 110 from flowing back to the lowest-level heat exchange module 100.

[0049] like Figure 1 and Figure 4 As shown, the water supply device 330 is connected to a water supply pipe 331, and the water return device 320 is connected to a water return pipe 321. A power module 500 is provided between the water supply pipe 331 and the water return pipe 321. The power module 500 includes a circulating water pump 510 and a heat exchanger 520 provided on the water return pipe 321. When the power module 500 is working, the circulating water pump 510 configured therein continuously transfers the water medium in the bottom heat exchange module 100 through the water outlet pipe 110, the water return device 320, the water return pipe 321, the circulating water pump 510, the heat exchanger 520, the water supply pipe 331, the water supply pipe 330, and the water inlet pipe 120 in sequence. The water is pumped into the top heat exchange module 100, where it flows by gravity into the second heat exchange module. The water in the second heat exchange module 100 also flows by gravity into the third heat exchange module, and finally flows to the outlet pipe 110 of the bottom heat exchange module 100 and is sucked in by the circulating water pump 510. This causes the water to circulate repeatedly, transporting the cold / heat in the heat exchanger 520 to each heat exchange module 100. In addition, it should be emphasized that the flow of the water inside the heat exchange module is completely dependent on gravity, while the water in the water supply pipe 331 and the water return pipe 321 is driven by the circulating water pump, and the two work together.

[0050] Furthermore, the heat exchanger 520 is connected to the water supply pipe 331. In the present invention, the heat exchanger 520 is preferably a plate heat exchanger 520. The return pipe 321 is provided with a first valve body 530 and a third valve body 540. The first valve body 530 and the third valve body 540 are respectively located on both sides of the circulating water pump 510, and the third valve body 540 is located between the circulating water pump 510 and the heat exchanger 520. The return pipe 321 is provided with a water purifier 550 between the circulating water pump 510 and the third valve body 540. The water purifier 550 is provided with a The tenth valve body 551, specifically, the water purifier 550 is provided with a sewage pipe (not marked in the figure), which is connected to the water purifier 550, and the tenth valve body 551 is provided on the sewage pipe; the water supply pipe 331 of the power module 500 is provided with a second valve body 560 and a fourth valve body 570, the second valve body is located on the side close to the water supply 330, the third valve body 540 and the fourth valve body 570 are both located on the side of the heat exchanger 520 close to the heat exchange module 100, the return water pipe 321 is provided with a regulating tank 590, and the water supply pipe 331 is provided with a regulating tank 590. An exhaust pipe 592 connected to the regulating tank 590 is provided with a ninth valve body 593. The regulating tank 590 is provided with a water supply pipe 594 connected to the return water pipe 321, and the water supply pipe 594 is provided with an eighth valve body 591. The regulating tank 590 is provided with a regulating water pipe 580, and the regulating water pipe 580 is provided with a fifth valve body 581. A plurality of water level sensors 153 are provided in the second reversing area 150 at the bottom layer. The water level sensors 153 are electrically connected to the control system of the gravity flow radiation plate structure (not marked in the figure). Specifically, there are three water level sensors 153, and the heights of the three water level sensors 153 correspond to the top, middle and bottom of the second partition 151, respectively. Among them, the circulating water pump 510, the second valve body 560, the eighth valve body 591, the fifth valve body 581, the water purifier 550, the ninth valve body 593 and the tenth valve body 551 are all electrically connected to the control system. During normal operation, the first valve body 530, the second valve body 560, the third valve body 540 and the fourth valve body 570 are all in the open state, and the remaining valve bodies are in the closed state.

[0051] Normally, the tenth valve body 551 is closed. Pressure gauges (not shown) are installed at the inlet and outlet of the water purifier. When the gravity flow radiant panel air conditioning system is operating, when the pressure difference between the two pressure gauges reaches a first set value, it indicates that the water purifier 550 is clogged with impurities and can be cleaned. The control system (i.e., the electronic control) opens the tenth valve body 551 to drain water. Simultaneously, the electronic control closes the second valve body 560 (the ninth valve body 593 remains closed) and opens the eighth valve body 591. The circulating water pump 510 pumps the water medium in the regulating tank 590 to the water purifier 550 through the water supply pipe 594 to backwash the water purifier 550 and discharge the wastewater to the outside through the sewage pipe. When the pressure difference between the two pressure gauges reaches a second set value, the electronic control opens the second valve body 560 and simultaneously closes the tenth valve body 551 and the eighth valve body 591. The gravity flow radiant panel completes the cleaning of the filter 550 and the gravity flow radiant panel returns to normal operation, where the first set value is greater than the second set value.

[0052] After the gravity flow radiation panel structure is assembled, all components and pipes that constitute the gravity flow radiation panel structure, including the heat exchange module 100, the power module 500, the return pipe 321, the water supply pipe 331, etc., must first be dynamically filled with water: First, the fifth valve body 581 is electrically opened, and the distilled water medium enters the regulating tank 590 through the regulating water pipe 580; Second, based on the signal from the water level detector in the regulating tank 590, when the water level reaches the set water level position, the second valve body 560 and the ninth valve body 593 are electrically opened. , the eighth valve body 591, the water medium in the regulating tank 590 is injected into the return pipe 321 and the reverse direction of the circulating water pump 510, the heat exchanger 520, and the water supply pipe 331 through the tee at the connection between the water supply pipe and the return pipe. At the same time, the exhaust pipe 592 discharges the air in the pipeline system into the regulating tank 590 and discharges it to the outside air through the air filter on the top of the regulating tank. Further, the water medium injected into the return pipe 321 is cut off at the check valve 322 and is not fed to the circulating water pump 510, the heat exchanger 520, and the water supply pipe 331. , the water medium injected into the water supply pipe 331 passes through the second valve body and enters the uppermost heat exchange module; the third step, after a certain period of time, the water medium in the uppermost heat exchange module exceeds the water outlet and overflows to the second reversing area (the dynamic water level of each part will be stable at the first water level line and the second water level line), and continues to be injected into the lower heat exchange module through the deflector, and the water filling process of the uppermost heat exchange module is repeated until the lowermost heat exchange module; the fourth step, after a certain period of water injection, the water medium in the lowermost heat exchange module exceeds the water outlet and overflows to the second reversing area The second reversing zone overflows, and the water level in the second reversing zone will continue to rise. According to the water level sensor signal in the second reversing zone, when the water level reaches the middle water level sensor position, the eighth valve body 591 and the ninth valve body 593 are electrically closed, and the circulating water pump 510 is turned on. The circulating water pump 510 operates at the designed flow rate, so that the water medium circulates continuously between the gravity flow radiation plate structure and the plate heat exchanger; in the fifth step, when the water level in the regulating tank 590 reaches the middle water level sensor position, the fifth valve body 581 is electrically closed to stop water inflow.

[0053] After completing the above five procedures, the commissioning of the gravity flow radiant panel air conditioning system is complete. Generally, it is no longer necessary to add distilled water from the outside. The water medium in the system only needs to be adjusted between the gravity flow radiant panel structure and the regulating tank 590. When the gravity flow radiant panel is shut down, the excess water medium in the gravity flow radiant panel structure must be pumped into the regulating tank 590 for storage. When the gravity flow radiant panel air conditioning system is started up, the water medium stored in the regulating tank 590 must be injected into the gravity flow radiant panel structure to enable the water medium to circulate. The specific implementation steps are as follows: A. Shutdown and standby: The second valve body 560 is electrically closed, the eighth valve body 591 is opened, and the operating frequency of the circulating water pump 510 is reduced. At this time, the water medium in the uppermost heat exchange module 100 that is higher than the water outlet 142 and the water medium in the second reversing area 150 will flow into the heat exchange module in the next layer, and the water medium in each heat exchange module 100 that is higher than the water outlet 142 will flow into the heat exchange module in the lower layer. Therefore, when the second valve body 560 is electrically closed, the circulating water pump 510 needs to be reduced. The water pump 510 operates at a reduced frequency, continuously pumping excess water into the second reversing area 150 of the bottom-most heat exchange module 100 to the regulating tank 590 for storage. Based on the water level sensor signal in the bottom-most second reversing area 150, when the water level drops to the lowest water level sensor position, the electronic control shuts off the circulating water pump 510, closes the eighth valve 591, and opens the ninth valve 593 to prevent thermal expansion and contraction from damaging the pipes. The entire radiation panel structure enters a shutdown standby state. B. Startup operation: The eighth valve body 591 and the second valve body 560 are opened electronically (the ninth valve body 593 is still in the open state). The water medium in the regulating tank 590 is injected into the uppermost heat exchange module 100 through the circulating water pump 510, the heat exchanger 520, and the water supply pipe 331 according to the flow rate limited by the water supply pipe. At the same time, the exhaust pipe 592 discharges the air in the pipeline system into the regulating tank 590. After a certain period of time, the water medium in the uppermost heat exchange module 100 exceeds the water outlet 152 and overflows into the second reversing area 150 (the dynamic water level of each part will stabilize at the first water level line and the second water level line 172), and continues to flow to the lower layer through the deflector 180. The water medium is injected into the heat exchange module of the lower layer, and the water filling process of the upper heat exchange module is repeated until the water medium flows into the heat exchange module 100 of the lower layer. When the water level in the second reversing area 150 of the heat exchange module 100 of the lower layer reaches the set middle water level sensor position, the eighth valve body 591 and the ninth valve body 593 are electrically closed, and the circulating water pump 510 is turned on. The water pump operates at the designed flow rate to circulate the water medium between the gravity flow radiation plate structure and the heat exchanger 520. After the water medium exchanges heat in the heat exchanger 520, the cold / heat obtained from the heat exchanger 520 is transferred to the gravity flow radiation plate structure to achieve the normal operation of the gravity flow radiation plate structure.

[0054] Furthermore, temperature sensors (not marked in the figure) are provided at the inlet and outlet of the heat exchanger on the side close to the heat exchange module 100. When the temperature difference between the two temperature sensors is less than the set value and the indoor temperature has not reached the set temperature, the water flow of the circulating water pump 510 is increased (until the design water flow is reached). When the indoor temperature approaches the set temperature, the water flow of the circulating water pump 510 can be reduced.

[0055] Furthermore, during the operation of the gravity flow radiation panel, based on the water level data in the second reversing zone 150 of the lowest layer, when there is a water shortage (the water level drops to the position of the lowest water level sensor), the eighth valve body 591 is opened, and the regulating tank 590 replenishes water to the system; when there is too much water medium and the water level in the second reversing zone 150 of the lowest layer reaches the position of the uppermost water level sensor, the second valve body 560 is closed and the ninth valve body 593 is opened at the same time, and the circulating water pump 510 pumps the excess water into the regulating tank 590.

[0056] Furthermore, two water level probes (not marked in the figure) are provided in the condensate tank 210. The heights of the two water level probes are different. When the condensate level in the tank reaches the position of the higher water level probe, the condensate pump 220 starts to drain the condensate. When the water level drops to the position of the lower water level probe, the condensate pump 220 stops running.

[0057] Furthermore, two water level detectors (not marked in the figure) are provided in the regulating tank 590. The heights of the two water level detectors are different. When the water level drops to the position of the lower water level detector, the fifth valve body 581 is opened to replenish distilled water. When the water level rises to the position of the higher water level detector, the fifth valve body 581 is closed to stop replenishing water, thereby reserving the regulating volume required for the normal operation of the gravity flow radiation plate in the regulating tank 590.

[0058] Example 2 like Figure 7 As shown, this embodiment applies the gravity flow radiation plate structure in the first embodiment to an existing one-on-one air conditioner.

[0059] Specifically, an air conditioning system includes: a cold / heat source structure 800 and the above-mentioned gravity flow radiation plate structure, wherein the cold / heat source structure (800) is used to provide a cold / heat source for the gravity flow radiation plate structure. Specifically, the cold / heat source structure uses a split air conditioning outdoor unit, and a first channel (not marked in the figure) and a second channel (not marked in the figure) are provided in the heat exchanger. The side where the heat exchanger is connected to the heat exchange module is called the working side, and the side where the heat exchanger is connected to the cold / heat source structure is called the cold / heat source side. The first channel (not marked in the figure) is connected to an interface (not marked in the figure) provided on the cold / heat source side, and the second channel (not marked in the figure) is connected to the heat exchange module. The interface (not marked in the figure) set on the working side is connected, wherein the refrigerant pipe on the split air-conditioning outdoor unit is connected to the interface on the cold / heat source side of the heat exchanger 520, and the working side interface of the heat exchanger 520 is respectively connected to the water supply pipe 331 and the return pipe 321 of the gravity flow radiation plate structure. During operation, the refrigerant in the first channel and the circulating water medium in the second channel exchange heat and cold, thereby transferring the cold / heat generated by the split air-conditioning outdoor unit to the water medium in the second channel, and the water medium continuously circulates between the heat exchanger 520 and the heat exchange module. In this way, the heating / cooling of the split air-conditioning outdoor unit and the indoor radiation plate structure can be realized.

[0060] Example 3 This embodiment applies the gravity flow radiation panel structure in the first embodiment to an existing water system central air conditioner.

[0061] Specifically, an air conditioning system includes: a chilled water pump 600, an air conditioning host device 700 and the above-mentioned gravity flow radiation plate structure, the chilled water pump 600 is connected to the air conditioning host device 700, a return water riser 610 is provided at the water inlet of the chilled water pump 600, and a water supply riser 710 is provided at the water outlet of the air conditioning host device 700, the water supply riser 710 is provided with a plurality of water supply mains 711, the return water riser 610 is provided with the same number of return water mains 611 as the water supply mains 711, and each of the water supply mains 711 is provided with a corresponding return water main 611. There are multiple such radiation panel structures, which are connected to the water supply main 711 and the return water main 611 through the water supply branch pipe 720 and the return water branch pipe 730, respectively. The water supply branch pipe 720 and the return water branch pipe 730 are connected to the cold / heat source side of the heat exchanger 520. A sixth valve body 711a is provided at one end of the water supply main 711 near the water supply riser 710, and a seventh valve body 611a is provided at one end of the return water main 611 near the return riser 610. The sixth valve body 711a and the seventh valve body 611a are used to shut off the water source when the water supply main 711 and the return water main 611 are under maintenance.

[0062] In actual use, as with existing central air conditioners, the chilled water pump is first turned on, and then the air conditioning host equipment is turned on, so that the water medium in the entire system, namely the water supply riser 710, the water supply main 711, the water supply branch pipe 720, the heat exchangers 520, the return branch pipe 730, the return main 611, and the return riser 610, circulates and adjusts the temperature. When any indoor space needs to be temperature-controlled, the control system controls the gravity flow radiation panel structure corresponding to the space, and the gravity flow radiation panel structure automatically starts and operates according to the above-mentioned startup operation procedure. Then, the control system controls the gravity flow radiation panel structure controller to shut down, and the gravity flow radiation panel air conditioner automatically executes the shutdown procedure according to the above-mentioned shutdown standby process.

[0063] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship, movement, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, descriptions such as "first", "second", "one", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" can explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. Gravity flow radiation plate structure, characterized in that: include: A plurality of heat exchange modules (100) are arranged from bottom to top, each of the heat exchange modules (100) having a hollow flat plate structure, wherein the outlet pipe (110) of the upper layer of heat exchange modules (100) is connected to the inlet pipe (120) of the lower layer of heat exchange modules (100), and the outlet pipe (110) and the inlet pipe (120) of each heat exchange module (100) are arranged opposite to each other, and each heat exchange module (100) is provided with a flow area (130), and the water medium in two adjacent flow areas (130) flows in opposite directions.

2. The gravity flow radiation plate structure according to claim 1, characterized in that: Each of the heat exchange modules (100) is provided with a first reversing area (140) in communication with the water inlet pipe (120) and a second reversing area (150) in communication with the water outlet pipe (110); the flow area (130) is located between the first reversing area (140) and the second reversing area (150); and the bottom of the first reversing area (140) and the top of the second reversing area (150) are both in communication with the flow area (130).

3. The gravity flow radiation plate structure according to claim 2, characterized in that: Each of the heat exchange modules (100) comprises a bottom plate (160), two side plates (161), a top plate (162), and two panel plates (163) for forming a hollow flat plate structure, wherein the bottom plate (160) of the upper layer of heat exchange modules (100) and the top plate (162) of the lower layer of heat exchange modules (100) are connected or integrally formed.

4. The gravity flow radiation plate structure according to claim 3, characterized in that: A plurality of transversely arranged diverter plates (131) are provided in the flow area (130), each of the diverter plates (131) is parallel to each other, a first gap (132) is provided between each of the diverter plates (131) and the first reversing area (140), and a second gap (133) is provided between each of the diverter plates (131) and the second reversing area (150).

5. The gravity flow radiation plate structure according to claim 2 or 4, characterized in that: A first partition (141) is provided on one side of the first reversing area (140) close to the flow area (130), one end of the first partition (141) is connected to the top plate (162), and a water inlet (142) is provided between the other end of the first partition (141) and the bottom plate (160).

6. The gravity flow radiation plate structure according to claim 2 or 4, characterized in that: A second partition (151) is provided on one side of the second reversing area (150) close to the flow area (130), one end of the second partition (151) is connected to the bottom plate (160), and a water outlet (152) is provided between the other end of the second partition (151) and the top plate (162).

7. The gravity flow radiation plate structure according to claim 5, characterized in that: The internal top of the heat exchange module (100) is further provided with a flattening area (170) communicating with the flow area (130); the top of the first reversing area (140) is provided with an air cavity (171) communicating with the first reversing area (140); the air cavity (171) is located in the flattening area (170); and the first partition (141) is provided with an air vent (141a) for communicating the air cavity (171) with the flow area (130).

8. The gravity flow radiation plate structure according to claim 7, characterized in that: Each heat exchange module (100) has a plurality of water inlet pipes (120), wherein the water inlet pipe (120) located on the top layer is in communication with the air cavity (171).

9. The gravity flow radiation plate structure according to claim 7, characterized in that: It also includes a flow guide (180) provided on one side of the heat exchange module (100), wherein the flow guide (180) connects the water outlet pipe (110) of the upper layer of heat exchange module (100) with the water inlet pipe (120) of the lower layer of heat exchange module (100).

10. The gravity flow radiation plate structure according to claim 9, characterized in that: The deflector (180), the first reversing area (140), and the second reversing area (150) are all filled with steel mesh (190).

11. The gravity flow radiation plate structure according to claim 9, characterized in that: A vent pipe (181) is provided on the heat exchange module (100) located on the top layer. The vent pipe (181) is in communication with the flattening area (170). A filter (181a) in communication with external air is provided on the vent pipe (181). The height of the filter (181a) is higher than or equal to the height of the flattening area (170).

12. The gravity flow radiation plate structure according to claim 9, characterized in that: The heat exchange module (100) further comprises a condensate water collection area (200) provided below the heat exchange module (100), wherein the condensate water collection area (200) comprises a water collection tank (210), wherein at least one condensate water pump (220) is provided in the water collection tank (210), and wherein a condensate water pipe (230) is provided on the condensate water pump (220), and wherein the condensate water pipe (230) is in communication with one of the flow guides (180).

13. The gravity flow radiation plate structure according to claim 1, characterized in that: Columns (300) are provided on both sides of the heat exchange module (100), and the water inlet pipe (120) and the water outlet pipe (110) are respectively located in corresponding columns (300).

14. The gravity flow radiation plate structure according to claim 13, characterized in that: A heat preservation plate (400) is provided on one side of the heat exchange module (100); a water supply device (330) is connected to the water inlet pipe (120) of the heat exchange module (100) located at the top layer; a water return device (320) is connected to the water outlet pipe (110) of the heat exchange module (100) located at the bottom layer; a heat preservation block (310) is provided in the column (300); the heat preservation block (310) wraps the water return device (320) and the water supply device (330).

15. The gravity flow radiation plate structure according to claim 14, characterized in that: The water supply device (330) is connected to a water supply pipe (331), and the water return device (320) is connected to a water return pipe (321). A power module (500) is provided between the water supply pipe (331) and the water return pipe (321). The power module (500) includes a circulating water pump (510) and a heat exchanger (520) provided on the water return pipe (321). The heat exchanger (520) is in communication with the water supply pipe (331). The water return pipe (321) is provided with a A first valve body (530) and a third valve body (540) are provided. The first valve body (530) and the third valve body (540) are respectively located on both sides of the circulating water pump (510), and the third valve body (540) is located between the circulating water pump (510) and the heat exchanger (520). The return water pipe (321) is located between the circulating water pump (510) and the third valve body (540). A water purifier (550) is provided. A tenth valve body (551) is provided on the water purifier (550).

16. The gravity flow radiation plate structure according to claim 15, characterized in that: The water supply pipe (331) is provided with a second valve body (560) and a fourth valve body (570), the second valve body (560) is located on a side close to the water supply device (330), the third valve body (540) and the fourth valve body (570) are both located on a side of the heat exchanger (520) close to the heat exchange module (100), the return water pipe (321) is provided with a regulating tank (590), the water supply pipe (331) is provided with an exhaust pipe (592) connected to the regulating tank (590), the exhaust pipe (592) is provided with a ninth valve body (593), the regulating tank (590) is provided with a water supply pipe (594) connected to the return water pipe (321), the water supply pipe (594) is provided with an eighth valve body (591), the regulating tank (590) is provided with a regulating water pipe (580), and the regulating water pipe (580) is provided with a fifth valve body (581).

17. An air conditioning system, characterized in that: include: A cold / heat source structure (800) and a gravity flow type radiation plate structure according to any one of claims 1 to 16, wherein the cold / heat source structure (800) is used to provide a cold / heat source for the gravity flow type radiation plate structure.

18. An air conditioning system, characterized in that: include: A chilled water pump (600), an air conditioning main unit (700), and a gravity flow radiation plate structure according to any one of claims 1 to 16, wherein the chilled water pump (600) is in communication with the air conditioning main unit (700), a return water riser (610) is provided at a water inlet of the chilled water pump (600), a water supply riser (710) is provided at a water outlet of the air conditioning main unit (700), a plurality of water supply mains (711) are provided on the water supply riser (710), and the return water riser (610) is provided with the same number of return water mains (611) as the number of water supply mains (711), a plurality of radiation plate structures are provided between each of the water supply mains (711) and the corresponding return water main (611), and the radiation plate structures are in communication with the water supply main (711) and the return water main (611) respectively through a water supply branch pipe (720) and a return water branch pipe (730).

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