Solar-assisted multi-radiation terminal air conditioning system

Abstract

The utility model discloses a solar-assisted multi-radiation terminal air conditioning system, which belongs to the technical field of building environment control and comprises a radiation system, a fresh air system and a solar heat supply system. The radiation system comprises a radiation heat pump unit, the radiation heat pump unit is connected with a radiation heat preservation water tank, the radiation heat preservation water tank is connected with a multi-tail-end radiation module, and the multi-tail-end radiation module comprises a floor radiation module, a wall surface radiation module and a top plate radiation module which are arranged in parallel; the fresh air system comprises a fresh air heat pump unit, the fresh air heat pump unit is connected with a fresh air heat preservation water tank, and the fresh air heat preservation water tank is connected with a fresh air unit. The solar heat supply system comprises a solar water heater and is connected with the plate heat exchanger through a heat exchange water supply and return pipeline. The floor radiation module, the wall surface radiation module and the top plate radiation module are arranged in parallel, and convection heat exchange with the indoor space is realized through the radiation pipeline of the multi-terminal radiation module, so that the indoor temperature is uniform, the radiation heat exchange capability is improved, and the indoor cooling and heating load demand is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to building environment control technical field, concretely relates to a solar energy assisted multi-radiation terminal air conditioning system. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute prior art.

[0003] With the improvement of building energy saving and comfort demand, radiation air conditioning system is widely applied due to its low noise, high energy efficiency, no blowing sensation and other advantages.

[0004] Such as patent CN203628908U discloses air source heat pump radiation air conditioning system, including air source heat pump unit, air conditioning water energy storage tank, fresh air dehumidifier, radiation terminal and air conditioning water circulation pipeline;Fresh air dehumidifier and radiation terminal are connected in parallel, and are connected in series with air source heat pump unit and air conditioning water energy storage tank in air conditioning water circulation pipeline;Adopt solar energy auxiliary heating, and system comfort degree is high, and operation is reliable, can greatly reduce system operation energy consumption when operating in winter.

[0005] The above scheme has the following shortcomings: only single roof radiation terminal form is adopted, and radiation heat exchange capacity is limited, in order to meet the indoor cold and heat load demand, larger water supply temperature difference is usually adopted, that is, the water supply temperature is usually higher than 35 DEG C in winter, and the water supply temperature is usually lower than 18 DEG C in summer, which reduces the operation energy efficiency of heat pump unit, resulting in increased system energy consumption;At the same time, large temperature difference cooling increases the risk of radiation terminal surface dewing, in addition, indoor pollutants are not considered, and environmental parameter monitoring is not comprehensive;Solar heating water temperature is not limited, which is easy to cause low-efficiency heating;Radiation terminal temperature is not controlled, and the load variation capacity is insufficient. UTILITY MODEL CONTENTS

[0006] In view of the above problems, the utility model provides a solar energy assisted multi-radiation terminal air conditioning system, and floor radiation module, wall surface radiation module and roof radiation module are arranged in parallel, the radiation pipeline of the multi-terminal radiation module is connected with indoor convection heat exchange, the indoor temperature is uniform, the radiation heat exchange capacity is increased, and the indoor cold and heat load demand is reduced;The TVOC sensor detects indoor pollutants, the solar hot water temperature is monitored, the water temperature of solar energy participating in heating is limited, and low-efficiency heating is avoided;The indoor temperature is monitored through the indoor temperature and humidity sensor, and the radiation terminal temperature is controlled.

[0007] To achieve the above object, the utility model adopts the following technical scheme:

[0008] A solar energy assisted multi-radiation terminal air conditioning system, comprising a radiation system, a fresh air system and a solar heating system.

[0009] The radiation system comprises a radiation heat pump unit, the radiation heat pump unit is connected with a radiation heat preservation water tank through a heat pump supply and return water pipeline, the radiation heat preservation water tank is connected with a multi-terminal radiation module through a radiation total supply and return water pipeline, and the multi-terminal radiation module comprises floor radiation modules, wall surface radiation modules and roof radiation modules which are arranged in parallel.

[0010] The fresh air system comprises a fresh air heat pump unit, the fresh air heat pump unit is connected with a fresh air heat preservation water tank through a fresh air heat pump supply and return water pipeline, and the fresh air heat preservation water tank is connected with the fresh air unit through a fresh air supply and return water pipeline.

[0011] The solar heat supply system comprises a solar water heater, the solar heat supply system is connected with a plate heat exchanger through a heat exchange supply and return water pipeline, and the solar heat supply system provides domestic water to a user side through a solar supply and return water pipeline.

[0012] Preferably, the fresh air heat preservation water tank and the radiation heat preservation water tank are connected through a cold and heat source supply and return water pipeline, a cold and heat source water supply pump is arranged on the cold and heat source water supply pipeline, a fresh air water tank water supply valve and a radiation water tank water supply valve are arranged on the two sides of the cold and heat source water supply pump, and a fresh air water tank water return valve and a radiation water tank water return valve are arranged on a cold and heat source water return pipeline.

[0013] Preferably, the plate heat exchanger is connected between the cold and heat source water supply pump and the fresh air water tank water supply valve through an auxiliary water supply pipeline, the plate heat exchanger is connected between the fresh air water tank water return valve and the radiation water tank water return valve through an auxiliary water return pipeline, a heat exchanger water supply valve is arranged on the auxiliary water supply pipeline, and a heat exchanger water return valve is arranged on the auxiliary water return pipeline.

[0014] Preferably, corresponding water return valves and water supply valves are arranged on the fresh air supply and return water pipeline, the fresh air heat pump supply and return water pipeline, the heat pump supply and return water pipeline, the radiation total supply and return water pipeline, the solar supply and return water pipeline and the heat exchange supply and return water pipeline.

[0015] Preferably, a fresh air water supply pump is arranged on the fresh air supply and return water pipeline, a radiation water supply pump is arranged on the radiation total supply and return water pipeline, and a solar circulating water pump is arranged on the heat exchange supply and return water pipeline.

[0016] Preferably, the floor radiation modules, the wall surface radiation modules and the roof radiation modules each comprise a water mixing pump, a branch water supply pipeline, a branch water return pipeline, a water distributor, a radiation pipeline and a water collector, a branch water supply valve is arranged on the branch water supply pipeline, a branch water return valve is arranged on the branch water return pipeline, and all the water return valves and the water supply valves are electric valves.

[0017] Preferably, the fresh air unit comprises a filter module, a heat exchange module, a heat exchange dehumidification module and a fan, and the fan is a variable frequency fan.

[0018] Preferably, the radiant pipe of the floor radiant module is arranged in the radiant floor, and the radiant floor is a multi-layer structure, from the floor upward, successively being a floor heat insulation layer, the radiant pipe, a leveling layer, a moisture-proof isolation layer and a ground decoration layer; the radiant pipe is fixed to the heat insulation layer and embedded in the leveling layer.

[0019] Preferably, the radiant pipe of the wall radiant module or the roof radiant module is arranged in the radiant wall or the radiant roof, and the radiant wall or the radiant roof is also a multi-layer structure, successively being a wall or a roof, a wall or a roof heat insulation layer, the radiant pipe, a batten, a heat conduction layer and a decoration layer; the radiant pipe is fixed between the heat conduction layer and the wall or the roof heat insulation layer through the batten, and the gap is filled with heat conduction gel.

[0020] Preferably, the system further comprises a PLC controller, indoor temperature and humidity sensors, carbon dioxide sensors, TVOC sensors, a solar water heater, a fresh air heat preservation water tank and a radiant heat preservation water tank, wherein water temperature sensors are arranged in the solar water heater, the fresh air heat preservation water tank and the radiant heat preservation water tank; the water temperature sensors, the temperature and humidity sensors, the carbon dioxide sensors and the TVOC sensors are connected with the PLC controller; and the PLC controller is connected with all the heat pump units, the water mixing pumps, the water supply pumps, the electric valves and the fans.

[0021] Compared with the prior art, the system has the advantages and positive effects that:

[0022] The floor radiant module, the wall radiant module and the roof radiant module are arranged in parallel, the radiant pipes of the multi-terminal radiant modules are in heat exchange with indoor air through convection, indoor temperature is uniform, radiant heat exchange capacity is increased, and indoor cold and heat load demand is reduced; the TVOC sensors are arranged to detect indoor pollutants, the solar water temperature is monitored, the solar water temperature for heat supply is limited, and inefficient heat supply is avoided; the temperature and humidity sensors are arranged to monitor indoor temperature, and radiant terminal temperature is controlled. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings constituting a part of the specification of the present application serve to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute improper limitations on the present application.

[0024] Figure 1 is a structure schematic view of the air conditioning system of the embodiment of the present application;

[0025] Figure 2 is a structure schematic view of the radiant floor of the embodiment of the present application;

[0026] Figure 3 is a structure schematic view of the radiant roof or the radiant wall of the embodiment of the present application;

[0027] In the drawings:

[0028] 101, floor water mixing pump; 102, floor water return valve; 103, floor water supply valve; 104, floor water distributor; 105, floor radiant pipe; 106, floor water collector; 111, wall water mixing pump; 112, wall water return valve; 113, wall water supply valve; 114, wall water distributor; 115, wall radiant pipe; 116, wall water collector; 121, roof water mixing pump; 122, roof water return valve; 123, roof water supply valve; 124, roof water distributor; 125, roof radiant pipe; 126, roof water collector; 131, radiant water return valve; 132, radiant water supply valve; 133, radiant water supply pump; 134, radiant water storage tank; 135, heat pump water return valve; 136, heat pump water supply valve; 137, radiant heat pump unit; 201, filter module; 202, heat exchange module; 203, heat exchange and dehumidification module; 204, fan; 211, fresh air water return valve; 212, fresh air water supply valve; 213, fresh air water supply pump; 221, fresh air water storage tank; 222, fresh air heat pump water return valve; 223, fresh air heat pump water supply valve; 224, fresh air heat pump unit; 301, user water supply valve; 302, user water return valve; 303, solar water heater; 304, solar water supply valve; 305, solar water return valve; 306, solar water circulating pump; 401, fresh air water tank water return valve; 402, fresh air water tank water supply valve; 403, radiant water tank water return valve; 404, radiant water tank water supply valve; 405, cold and heat source water supply pump; 406, plate heat exchanger; 407, heat exchanger water supply valve; 408, heat exchanger water return valve; 51, floor; 52, floor insulation layer; 53, leveling layer; 54, moisture-proof isolation layer; 55, ground decoration layer; 61, wall or roof; 62, wall or roof insulation layer; 63, keel; 64, heat conduction layer; 65, decoration layer. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] The present application will be described in detail below with reference to the accompanying drawings. The present embodiment discloses a solar-assisted multi-radiation terminal air conditioning system, as shown in the figure, which comprises a radiation system, a fresh air system and a solar heating system. The radiation system is connected to the fresh air system, and the solar heating system is connected to the radiation system and the fresh air system. Figure 1

[0031] Figure 1 ​​As shown, the radiation system comprises a radiation heat pump unit 137, which is connected to the radiation heat preservation water tank 134 through a heat pump supply and return water pipeline, and a heat pump return water valve 135 and a heat pump water supply valve 136 are arranged on the heat pump supply and return water pipeline. The radiation heat preservation water tank 134 is connected to the multi-terminal radiation module through a radiation total supply and return water pipeline, and a radiation total return water valve 131 and a radiation total water supply valve 132 are arranged on the radiation total supply and return water pipeline. A radiation water supply pump 133 is also arranged on the radiation total supply and return water pipeline. The multi-terminal radiation module is connected to the rear side of the radiation total return water valve 131 and the radiation total water supply valve 132, and the radiation water supply pump 133 can make the water in the radiation total supply and return water pipeline circulate.

[0032] The multi-terminal radiation module comprises floor radiation modules, wall radiation modules and ceiling radiation modules arranged in parallel. The floor radiation modules, the wall radiation modules and the ceiling radiation modules each comprise a water mixing pump, a branch supply water pipeline, a branch return water pipeline, a water distributor, a radiation pipeline and a water collector. A branch supply water valve is arranged on the branch supply water pipeline, and a branch return water valve is arranged on the branch return water pipeline. The floor radiation modules, the wall radiation modules and the ceiling radiation modules are connected to the radiation total supply and return water pipeline through the respective branch supply and return water pipelines.

[0033] Specifically, as shown in the figure, Figure 1 The floor radiation module comprises a floor water mixing pump 101, which is connected to a floor branch supply water pipeline and a floor branch return water pipeline. A floor branch supply water valve 103 is arranged on the floor branch supply water pipeline, and a floor branch return water valve 102 is arranged on the floor branch return water pipeline. A floor water distributor 104 is arranged between the floor branch supply water valve 103 and a floor radiation pipeline 105, and a floor water collector 106 is arranged between the floor branch return water valve 102 and the floor radiation pipeline 105. It can be understood that when the floor branch return water valve 102 and the floor branch supply water valve 103 are opened, the floor water mixing pump 101 drives the water in the floor branch supply water pipeline and the floor branch return water pipeline to circulate. The water passes through the floor water distributor 104 into the floor radiation pipeline 105, and then passes through the floor water collector 106.

[0034] Similarly, the wall radiation module comprises a wall water mixing pump 111, which is connected to a wall branch supply water pipeline and a wall branch return water pipeline. A wall branch supply water valve 113 is arranged on the wall branch supply water pipeline, and a wall branch return water valve 112 is arranged on the wall branch return water pipeline. A wall water distributor 114 is arranged between the wall branch supply water valve 113 and a wall radiation pipeline 115, and a wall water collector 116 is arranged between the wall branch return water valve 112 and the wall radiation pipeline 115.

[0035] The top plate radiation module comprises a top plate mixed water pump 121, the top plate mixed water pump 121 is connected with a top plate water distribution pipeline and a top plate water return pipeline, a top plate water distribution valve 123 is arranged on the top plate water distribution pipeline, a top plate water return valve 122 is arranged on the top plate water return pipeline, a top plate water distributor 124 is arranged between the top plate water distribution valve 123 and a top plate radiation pipe 125, and a top plate water collector 126 is arranged between the top plate water return valve 122 and the top plate radiation pipe 125.

[0036] As shown in Figure 1 The fresh air system comprises a fresh air heat pump unit 224, the fresh air heat pump unit 224 is connected with a fresh air heat preservation water tank 221 through a fresh air heat pump water supply and return pipeline, a fresh air heat pump water return valve 222 and a fresh air heat pump water supply valve 223 are arranged on the fresh air heat pump water supply and return pipeline.

[0037] The fresh air heat preservation water tank 221 is connected with the fresh air unit through a fresh air water supply and return pipeline, a fresh air water return valve 211, a fresh air water supply valve 212 and a fresh air water supply pump 213 are arranged on the fresh air water supply and return pipeline. The fresh air unit comprises a filter module 201, a heat exchange module 202, a heat exchange and dehumidification module 203 and a fan 204, and the fan 204 is a variable frequency fan.

[0038] The solar heat supply system comprises a solar water heater 303, the solar water heater 303 provides domestic water to the user side through a solar water supply and return pipeline, and a user water supply valve 301 and a user water return valve 302 are arranged on the solar water supply and return pipeline.

[0039] The solar heat supply system is connected with a plate heat exchanger 406 through a heat exchange water supply and return pipeline, a solar water supply valve 304, a solar water return valve 305 and a solar circulating water pump 306 are arranged on the heat exchange water supply and return pipeline.

[0040] As shown in Figure 1 The fresh air heat preservation water tank 221 is connected with the radiation heat preservation water tank 134 through a cold and heat source water supply and return pipeline, a cold and heat source water supply pump 405 is arranged on the cold and heat source water supply pipeline, a fresh air water tank water supply valve 402 and a radiation water tank water supply valve 404 are arranged on both sides of the cold and heat source water supply pump 405, and a fresh air water tank water return valve 401 and a radiation water tank water return valve 403 are arranged on the cold and heat source water return pipeline.

[0041] The plate heat exchanger 406 is connected between the cold and heat source water supply pump 405 and the fresh air water tank water supply valve 402 through an auxiliary water supply pipeline, the plate heat exchanger 406 is connected between the fresh air water tank water return valve 401 and the radiation water tank water return valve 403 through an auxiliary water return pipeline, a heat exchanger water supply valve 407 is arranged on the auxiliary water supply pipeline, and a heat exchanger water return valve 408 is arranged on the auxiliary water return pipeline.

[0042] The volume of the radiant heat preservation water tank 134 should be more than one time of the total water storage capacity of the radiant pipeline; the volume of the fresh air heat preservation water tank 221 should be more than 4 liters per square meter of air conditioning area.

[0043] In the embodiment, the fresh air heat preservation water tank and the radiant heat preservation water tank are both provided with heat insulation layers.

[0044] In the embodiment, the floor radiant pipes are arranged in the radiant floor, and the radiant floor is a multi-layer structure, from the floor slab 51 upwards, sequentially including a floor slab heat insulation layer 52, the floor radiant pipes 105, a leveling layer 53, a moisture-proof isolation layer 54, and a ground decoration layer 55. The floor radiant pipes 105 can be fixed to the floor slab heat insulation layer 52 by plastic buckles and embedded in the leveling layer 53, so as to ensure good contact between the pipes and the leveling layer and improve the heat exchange efficiency. The floor radiant pipes are selected as DN16 aluminum-plastic composite pipes, and the pipe spacing is set to 200 mm, and the thickness of the leveling layer is not less than 50 mm.

[0045] The wall radiant pipes or the roof radiant pipes are arranged in the radiant wall or the radiant roof, and the radiant wall or the radiant roof is also a multi-layer structure, sequentially including a wall or roof 61, a wall or roof heat insulation layer 62, the wall radiant pipes or the roof radiant pipes, a batten 63, a heat conduction layer 64, and a decoration layer 65. The wall radiant pipes or the roof radiant pipes are fixed between the heat conduction layer 64 and the wall or roof heat insulation layer 62 by the batten 63, and the gap is filled with heat conduction gel. The wall or roof radiant pipes are selected as DN16 stainless steel pipes, the pipe spacing is set to 150 mm, the batten is an aluminum alloy batten, and the heat conduction layer is made of aluminum.

[0046] In the embodiment, all the water return valves and water supply valves are electric valves.

[0047] The summer water supply temperature of the radiant system is 20-22℃, and the winter water supply temperature is 28-30℃; the summer water supply temperature of the fresh air system is 7℃, and the winter water supply temperature is 45℃.

[0048] In the embodiment, the solar heat supply system has a daytime operation mode and a nighttime operation mode. In the daytime operation mode, the water in the solar water heater participates in the heat supply of the air conditioning system in real time without heat storage; in the nighttime operation mode, the solar water heater is used for heat storage in the daytime, stops supplying domestic hot water, and does not participate in the heat supply of the air conditioning system, and participates in the heat supply of the air conditioning system between the early morning and sunrise when the outdoor temperature is relatively low and the efficiency of the radiant heat pump unit is reduced. The heat stored in the solar water heater can be used in the radiant system to improve the energy efficiency of the radiant system.

[0049] When the hot water temperature in the solar water heater is greater than 35℃, the hot water participates in the heat supply of the radiant system and exchanges heat with the water in the radiant heat preservation water tank; when the hot water temperature in the solar water heater is less than 35℃, the solar heat supply system stops running.

[0050] Also includes a PLC controller, indoor installation of temperature and humidity sensor, carbon dioxide sensor, TVOC sensor, solar water heater, fresh air heat preservation water tank, radiation heat preservation water tank, water temperature sensor is arranged in each; water temperature sensor, temperature and humidity sensor, carbon dioxide sensor, TVOC sensor and the input end of PLC controller are connected, and the detection information is transmitted to the PLC controller; the PLC controller and all the heat pump unit, water mixing pump, water supply pump, electric valve, fan are connected through the cable, which is the prior art, for example, the output end of the PLC controller (controller) is connected with the above equipment through the relay or contactor or / and frequency converter. The PLC controller can control the start-stop action of the heat pump unit, water mixing pump and water supply pump, can control the start-stop and frequency conversion action of the fan, and can control the on-off action of the electric valve.

[0051] It can be understood that the PLC controller can control the operation of the fresh air system and the radiation system according to the indoor temperature, dew point temperature, and air quality; for example, the dew point temperature is calculated by obtaining the indoor temperature and indoor humidity, when the dew point temperature is higher than 20 DEG C, the fresh air unit is controlled to run at high wind volume, and the radiation system is controlled to stop running, so as to rapidly reduce the indoor humidity and prevent dewing; when the obtained indoor carbon dioxide concentration is higher than 1000ppm or the TVOC concentration is greater than 0.6mg / m 3 When the fresh air unit is controlled to run at high wind volume, the indoor air quality is improved.

[0052] Working process:

[0053] When the fresh air system is started in summer, the PLC controller controls the fresh air heat pump unit 224 to start, the fresh air heat pump return valve 222 and the fresh air heat pump water valve 223 are opened, the fresh air heat pump unit produces low-temperature cold water, flows to the fresh air heat preservation water tank 221, the fresh air return valve 211 and the fresh air water supply valve 212 are opened, the fresh air water supply pump 213 is started to supply water for the fresh air unit, and flows to the heat exchange and dehumidification module 203; the fan 204 is started, the fresh air is filtered through the filter module 201, is heat exchanged through the heat exchange module 202, and is dehumidified through the heat exchange and dehumidification module 203 before being sent into the indoor;

[0054] Then the radiation heat pump unit 137 starts, the heat pump return water valve 135 and the heat pump water supply valve 136 open, the radiation heat pump unit produces high-temperature cold water, and stores it in the radiation insulation water tank 134. The radiation total return water valve 131 and the radiation total water supply valve 132 open, and the radiation water supply pump 133 starts. At the same time, the ceiling water mixing pump 121, the ceiling branch return water valve 122, the ceiling branch water supply valve 123, the wall surface water mixing pump 111, the wall surface branch return water valve 112, and the wall surface branch water supply valve 113 are opened. The cold water flows to the ceiling radiation pipe 125 and the wall surface radiation pipe 115. The PLC controller controls the water supply temperature of the wall surface radiation module and the ceiling radiation module in the set range by controlling the wall surface water mixing pump and the ceiling water mixing pump. In this embodiment, the water supply temperature of the wall surface radiation module and the ceiling radiation module is in the range of 20-22℃. It can be understood that the water supply temperature of the wall surface radiation module and the ceiling radiation module is adjusted according to the actual load condition.

[0055] Specifically, the wall surface water mixing pump or the ceiling water mixing pump has a group of inlet and outlet ports before and after it. The cold water of the radiation insulation water tank is pumped into the wall surface water mixing pump or the ceiling water mixing pump inlet by the radiation water supply pump 133. The return water flows back to the wall surface water mixing pump or the ceiling water mixing pump through the wall surface branch return water valve 112 or the ceiling branch return water valve 122. The wall surface water mixing pump or the ceiling water mixing pump can change the proportion of cold water and return water to change the temperature of the cold water supplied to the wall surface radiation pipe or the ceiling radiation pipe.

[0056] The ceiling radiation pipe 125 and the wall surface radiation pipe 115 have convective heat exchange with the indoor air. The temperature of the air near them decreases, the density increases, and the air flows from the upper part of the room to the lower part, making the indoor temperature uniform. The radiation heat exchange capacity is increased, and the indoor cooling and heating load demand is reduced.

[0057] When the load is too large, i.e. the ceiling radiation pipe 125 and the wall surface radiation pipe 115 cannot meet the cooling demand, the PLC controller controls the floor branch return water valve 102 and the floor branch water supply valve 103 to open, and the floor water mixing pump 101 starts to increase the cooling capacity.

[0058] Specifically, in this embodiment, the high-temperature cold water produced by the radiation heat pump unit is 16℃, and the low-temperature cold water produced by the fresh air heat pump unit is 7℃. The temperature of the fresh air insulation water tank is maintained between 8 and 10℃, and the temperature of the radiation insulation water tank is maintained between 17 and 20℃.

[0059] When the water temperature sensor in the fresh air heat preservation water tank 221 detects that the current water temperature is higher than 10℃, the PLC controller controls the opening of the fresh air heat pump return water valve 222 and the fresh air heat pump water supply valve 223, and makes the fresh air heat pump unit 224 start working until the water temperature sensor in the fresh air heat preservation water tank 221 detects that the water temperature is lower than 8℃. When the water temperature sensor in the radiation heat preservation water tank 134 detects that the water temperature is higher than 20℃, the PLC controller controls the opening of the radiation heat pump return water valve 135 and the radiation heat pump water supply valve 136, and the radiation heat pump unit 137 starts working until the water temperature is lower than 17℃.

[0060] When the indoor load is small, the PLC controller controls the radiation heat pump unit 137 to be closed, and only the fresh air heat pump unit 224 is opened to save energy. At this time, the heat pump return water valve 135 and the heat pump water supply valve 136 are closed, the fresh air water tank return water valve 401, the fresh air water tank water supply valve 402, the radiation water tank return water valve 403 and the radiation water tank water supply valve 404 are opened, and the cold and heat source water supply pump 405 is started to only use the fresh air heat pump unit to prepare cold water and control the indoor environment.

[0061] In winter heating, the PLC controller controls the fresh air system and the radiation system to start at the same time, the fresh air heat pump unit 224 starts, the fresh air heat pump return water valve 222 and the fresh air heat pump water supply valve 223 are opened, the fresh air heat pump unit prepares high-temperature hot water, flows to the fresh air heat preservation water tank 221, the fresh air return water valve 211 and the fresh air water supply valve 212 are opened, the fresh air water supply pump 213 starts to supply water for the fresh air unit, flows to the heat and dehumidification module 203, and the fan 204 starts;

[0062] The radiation heat pump unit 137 starts, the heat pump return water valve 135 and the heat pump water supply valve 136 are opened, the heat pump unit prepares low-temperature hot water, and stores it in the radiation heat preservation water tank 134, the radiation total return water valve 131 and the radiation total water supply valve 132 are opened, the radiation water supply pump 133 starts, at the same time, the floor water mixing pump 101, the floor branch return water valve 102, the floor branch water supply valve 103, the wall surface water mixing pump 111, the wall surface branch return water valve 112 and the wall surface branch water supply valve 113 are opened, the hot water flows to the floor radiation pipe 105 and the wall surface radiation pipe 115, the PLC controller controls the water supply temperature of the wall surface radiation module and the floor radiation module in the set range by controlling the wall surface water mixing pump and the floor water mixing pump, in the embodiment, the water supply temperature of the wall surface radiation module and the floor radiation module is in the range of 28-30℃, and it can be understood that the water supply temperature of the wall surface radiation module and the floor radiation module can be adjusted according to the actual load condition. The water mixing pump can change the ratio of water inlet and return to change the hot water temperature supplied to the wall surface radiation pipe or the floor radiation pipe.

[0063] The floor radiant tube 105 and the wall radiant tube 115 have heat exchange with the indoor air, the air temperature near the tubes rises, the density of the air decreases, and the air flows from the lower part of the room to the upper part, so that the indoor temperature is uniform; the radiant heat exchange capacity is increased, and the indoor cold and heat load demand is reduced.

[0064] When the load is too large, that is, the floor radiant tube 105 and the wall radiant tube 115 cannot meet the heat supply demand, the PLC controller controls the top plate water return valve 122 and the top plate water supply valve 123 to be opened, and the top plate water mixing pump 121 is started to increase the heat supply.

[0065] Specifically, the high-temperature hot water prepared by the fresh air heat pump unit is 45℃, and the low-temperature hot water prepared by the radiant heat pump unit is 35℃.

[0066] The temperature of the fresh air heat preservation water tank is maintained between 41 and 44℃, and the temperature of the radiant heat preservation water tank is maintained between 31 and 34℃.

[0067] When the water temperature in the fresh air heat preservation water tank 221 is lower than 41℃, the fresh air heat pump return valve 222 and the fresh air heat pump supply valve 223 are opened, the fresh air heat pump unit 224 starts to work until the water temperature is higher than 44℃. When the water temperature in the radiant heat preservation water tank 134 is lower than 31℃, the radiant heat pump return valve 135 and the radiant heat pump supply valve 136 are opened, the radiant heat pump unit 137 starts to work until the water temperature is higher than 34℃. When the indoor load is small, the radiant heat pump unit 137 is closed to save energy, only the fresh air heat pump unit 224 is opened, the heat pump return valve 135 and the heat pump supply valve 136 are closed, the fresh air tank return valve 401, the fresh air tank supply valve 402, the radiant tank return valve 403, and the radiant tank supply valve 404 are opened, and the cold and heat source water supply pump 405 is started to use only the fresh air heat pump unit to prepare hot water and control the indoor environment.

[0068] In winter heating condition, the solar heat supply system participates in heating, and has a daytime operation mode and a nighttime operation mode, which are selected by the user.

[0069] When the day operation mode is selected, the solar heating system participates in heating from 9:00 to 16:00, the PLC controller monitors the hot water temperature of the solar water heater 303 in real time, when the hot water in the solar water heater 303 is greater than 35℃, the PLC controller controls the solar water supply valve 304 and the solar return valve 305 to open, the solar circulating water pump 306 runs, the hot water prepared by the solar water heater 303 flows in the plate heat exchanger and exchanges heat with the water in the radiant heat preservation water tank 134, the fresh air water tank return valve 401 and the fresh air water tank water supply valve 402 are closed, the radiant water tank return valve 403, the radiant water tank water supply valve 404, the heat exchanger water supply valve 407 and the heat exchanger return valve 408 are opened, and the cold heat source water supply pump 405 starts to run. The water in the radiant heat preservation water tank 134 flows through the radiant water tank water supply valve 404, is pumped to the plate heat exchanger 406 by the cold heat source water supply pump 405, exchanges heat with the hot water of the solar water heater 303, flows back to the radiant heat preservation water tank 134 through the heat exchanger return valve 408 and the third radiant water tank return valve 403. When the hot water in the solar water heater 303 is lower than 35℃, the solar heating system stops running.

[0070] When the night operation mode is selected, the solar heating system stores heat during the day, and the user water supply valve 301 and the user return valve 302 are closed, participates in heating from 0:00 to 6:00 in the morning, the PLC controller monitors the hot water temperature of the solar water heater 303 in real time, when the hot water in the solar water heater 303 is greater than 35℃, exchanges heat with the water in the radiant heat preservation water tank 134, the fresh air water tank return valve 401 and the fresh air water tank water supply valve 402 are closed, the radiant water tank return valve 403, the radiant water tank water supply valve 404, the heat exchanger water supply valve 407 and the heat exchanger return valve 408 are opened, and the cold heat source water supply pump 405 starts to run. The water in the radiant heat preservation water tank 134 flows through the radiant water tank water supply valve 404, is pumped to the plate heat exchanger 406 by the cold heat source water supply pump 405, exchanges heat with the hot water of the solar water heater 303, flows back to the radiant heat preservation water tank 134 through the heat exchanger return valve 408 and the third radiant water tank return valve 403. When the hot water in the solar water heater 303 is lower than 35℃, the solar heating system stops running.

[0071] Although the specific embodiments of the utility model have been described in combination with the drawings, it is not a limitation on the protection scope of the utility model, and those skilled in the art should understand that various modifications or deformations made by those skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A solar-assisted multi-radiant terminal air conditioning system, characterized in that, The system comprises a radiation system, a fresh air system, and a solar heating system. The radiation system comprises a radiation heat pump unit, which is connected to a radiation heat preservation water tank through a heat pump water supply and return pipeline, and the radiation heat preservation water tank is connected to a multi-terminal radiation module through a radiation total water supply and return pipeline. The fresh air system comprises a fresh air heat pump unit, which is connected to a fresh air heat preservation water tank through a fresh air heat pump water supply and return pipeline. The solar heating system comprises a solar water heater, which is connected to a plate heat exchanger through a heat exchange water supply and return pipeline, and provides domestic water to the user side through a solar water supply and return pipeline.

2. A solar assisted multi-radiant terminal air conditioning system as set forth in claim 1 wherein, The fresh air heat preservation water tank and the radiation heat preservation water tank are connected through a cold and heat source water supply and return pipeline, a cold and heat source water supply pump is arranged on the cold and heat source water supply pipeline, a fresh air water tank water supply valve and a radiation water tank water supply valve are arranged on both sides of the cold and heat source water supply pump, and a fresh air water tank water return valve and a radiation water tank water return valve are arranged on a cold and heat source water return pipeline.

3. A solar assisted multi-radiant terminal air conditioning system as set forth in claim 2 wherein, The plate heat exchanger is connected between the cold and heat source water supply pump and the fresh air water tank water supply valve through an auxiliary water supply pipeline, and is connected between the fresh air water tank water return valve and the radiation water tank water return valve through an auxiliary water return pipeline.

4. A solar assisted multi-radiant terminal air conditioning system according to claim 1, wherein, Respective water return valves and water supply valves are arranged on the fresh air water supply and return pipeline, the fresh air heat pump water supply and return pipeline, the heat pump water supply and return pipeline, the radiation total water supply and return pipeline, the solar water supply and return pipeline, and the heat exchange water supply and return pipeline.

5. A solar assisted multi-radiant terminal air conditioning system according to claim 1, wherein, A fresh air water supply pump is arranged on the fresh air water supply and return pipeline, a radiation water supply pump is arranged on the radiation total water supply and return pipeline, and a solar circulating water pump is arranged on the heat exchange water supply and return pipeline.

6. A solar-assisted multi-radiant terminal air conditioning system according to claim 1, wherein, The floor radiation module, the wall surface radiation module, and the roof radiation module each comprise a water mixing pump, a branch water supply pipeline, a branch water return pipeline, a water distributor, a radiation pipeline, and a water collector, a branch water supply valve is arranged on the branch water supply pipeline, and a branch water return valve is arranged on the branch water return pipeline; all the water return valves and the water supply valves are electric valves.

7. A solar assisted multi-radiant terminal air conditioning system according to claim 1, wherein, The fresh air unit comprises a filter module, a heat exchange module, a heat exchange and dehumidification module, and a fan; the fan is a variable frequency fan.

8. A solar assisted multi-radiant terminal air conditioning system according to claim 1, wherein, The radiation pipeline of the floor radiation module is arranged in a radiation floor, and the radiation floor has a multi-layer structure, starting from a floor slab and sequentially comprising a floor slab heat insulation layer, a radiation pipeline, a leveling layer, a moisture-proof isolation layer, and a ground decoration layer; the radiation pipeline is fixed to the heat insulation layer and embedded in the leveling layer.

9. A solar assisted multi-radiant terminal air conditioning system according to claim 1, wherein, The radiation pipeline of the wall surface radiation module or the roof radiation module is arranged in a radiation wall surface or a radiation roof, and the radiation wall surface or the radiation roof also has a multi-layer structure, sequentially comprising a wall surface or a roof, a wall surface or a roof heat insulation layer, a radiation pipeline, a keel, a heat conduction layer, and a decoration layer; the radiation pipeline is fixed between the heat conduction layer and the wall surface or roof heat insulation layer through the keel, and a heat conduction gel is used to fill the gap.

10. A solar assisted multi-radiant terminal air conditioning system according to claim 1, wherein, It also includes a PLC controller, indoor installation of temperature and humidity sensor, carbon dioxide sensor, TVOC sensor, solar water heater, fresh air insulation water tank, radiation insulation water tank, water temperature sensor is arranged in each; Water temperature sensor, temperature and humidity sensor, carbon dioxide sensor, TVOC sensor are connected with PLC controller; PLC controller is connected with radiation heat pump unit, fresh air heat pump unit, water mixing pump, water supply pump, electric valve, fan.

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