Radiant air conditioning system and its control method

Abstract

This invention discloses a radiant air conditioning system and its control method. The radiant air conditioning system includes a radiant floor, which comprises radiant layer coils and energy storage layer coils. The radiant layer coils are located above the energy storage layer coils. The radiant layer coils provide cooling to the room when there is load demand. The energy storage layer coils utilize electricity price differences to store cooling during off-peak hours when there is no load demand, and provide cooling to the radiant layer coils during peak hours when there is load demand. This invention solves the problem of high energy consumption in existing radiant air conditioning systems and reduces their operating costs.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a radiant air conditioning system and its control method. Background Technology

[0002] As people pursue a higher quality of life, their demands for the comfort of air conditioning systems are also increasing. Radiant air conditioning systems, designed for 365 days a year with human health and comfort as the primary goal, integrate cooling, heating, fresh air, purification, humidification, dehumidification, domestic hot and cold water, indoor environmental monitoring, equipment operation monitoring, and intelligent control functions. They provide constant temperature, humidity, and oxygen levels, operating without wind, air, or noise, comprehensively addressing people's needs for temperature, humidity, oxygen content, and cleanliness in their living environment. They are currently the ideal solution for a healthy and comfortable indoor environment and are gaining increasing popularity.

[0003] With the increasing demand for energy conservation and emission reduction, green energy will account for an increasingly larger proportion of the power system. The power supply is facing a more serious situation of power grid imbalance and large peak-valley difference. The load rate is low at night, while the power supply is severely insufficient during the peak period of daytime. "Unloading" electricity from the peak to the off-peak period is a current research hotspot. At present, more and more cities are implementing peak-valley electricity price difference policies, and saving costs by taking advantage of the low electricity price period at night has become a new direction.

[0004] However, radiant air conditioning systems involve multiple devices and are large in scale. They often consume a lot of energy during operation, which is not conducive to energy conservation.

[0005] There is currently no effective solution to the problem of high energy consumption in radiant air conditioning systems in related technologies. Summary of the Invention

[0006] This invention provides a radiant air conditioning system and its control method to at least solve the problem of high energy consumption in existing radiant air conditioning systems.

[0007] To address the aforementioned technical problems, according to one aspect of the present invention, a radiant air conditioning system is provided, comprising: a radiant floor, the radiant floor including a radiant layer coil and an energy storage layer coil, wherein the radiant layer coil is located above the energy storage layer coil, the radiant layer coil is used to provide cooling capacity to the room when there is load demand, and the energy storage layer coil is used to store cooling during periods of low electricity prices and no load demand by utilizing the electricity price difference, and to provide cooling capacity to the radiant layer coil during periods of high electricity prices and when there is load demand.

[0008] Furthermore, the radiant layer coil and the energy storage layer coil are separated by thermal insulation material.

[0009] Furthermore, it also includes: a liquid pump, one end of which is connected to the refrigerant outlet of the energy storage layer coil, and the other end of which is connected to the refrigerant inlet of the radiation layer coil through a first electronic expansion valve, for compressing the refrigerant at the refrigerant outlet of the energy storage layer coil and then throttling it through the electronic expansion valve before it enters the radiation layer coil; a first electronic expansion valve, located on the pipeline between the liquid pump and the radiation layer coil; and a first control valve, located on the pipeline between the energy storage layer coil and the liquid pump, for controlling the opening and closing of the pipeline between the energy storage layer coil and the liquid pump.

[0010] Furthermore, it also includes: a terminal air system, used to deliver fresh air to the room and provide cool air to supplement the required cooling capacity of the room.

[0011] Furthermore, the terminal air system includes: a fresh air unit for supplying fresh air to the room, the fresh air unit including at least a fresh air duct, a fresh air valve, a supply air valve, a return air valve and a terminal fan; and an air-cooling unit for providing cool air to the room to supplement the required cooling capacity, the air-cooling unit including at least a supply air heat exchanger, an outdoor condenser, a second electronic expansion valve and an air pump, the outdoor condenser being connected to the supply air heat exchanger through the second electronic expansion valve to provide cool air to the room, and then connected to the outdoor condenser through the air pump to form a refrigerant circulation loop.

[0012] Furthermore, the refrigerant inlet of the energy storage layer coil is also connected to the condenser outlet of the outdoor condenser through a third electronic expansion valve, and the refrigerant outlet of the energy storage layer coil is also connected to the refrigerant inlet of the air pump, so as to utilize the electricity price difference to store cold during off-peak electricity periods.

[0013] Furthermore, it also includes: a second control valve, located on the pipeline between the condenser outlet of the outdoor condenser and the third electronic expansion valve, used to control the on / off state of the pipeline between the energy storage layer coil and the liquid pump; and a first regulating valve, located on the pipeline between the third electronic expansion valve and the energy storage layer coil, used to regulate the cooling capacity of the energy storage layer coil.

[0014] Furthermore, the energy storage layer coil also exchanges heat with the outdoor condenser, using the stored cold energy to reduce the condensing temperature of the outdoor condenser and improve the energy efficiency of the terminal air system.

[0015] According to another aspect of the present invention, a radiant air conditioning system control method is provided, applied to the radiant air conditioning system as described above. The method includes: obtaining the current operating period of the radiant air conditioning system and determining whether there is a load demand; controlling the energy storage layer coil of the radiant floor to store cold when the current operating period is a low electricity price period and there is no load demand; and using the energy storage layer coil to provide cooling capacity to the radiant layer coil when the current operating period is a high electricity price period and there is a load demand.

[0016] Furthermore, controlling the energy storage layer coil of the radiant floor to store cold includes: controlling the opening of the third electronic expansion valve, the second control valve and the first regulating valve; using the energy storage layer coil to provide cooling capacity to the radiant layer coil includes: controlling the opening of the first electronic expansion valve and the first control valve.

[0017] Furthermore, it also includes: detecting environmental parameters; wherein the environmental parameters include at least the indoor dew point temperature and the floor surface temperature; and controlling the operation of the terminal ventilation system based on the environmental parameters.

[0018] Furthermore, controlling the operation of the terminal ventilation system based on environmental parameters includes: determining the priority of the control parameters of the terminal ventilation system; and controlling the operation of the terminal ventilation system based on the environmental parameters according to the priority of the control parameters.

[0019] Furthermore, the priority of the control parameters, from highest to lowest, is: indoor dew point temperature, indoor temperature, and indoor fresh air volume. Based on the priority of the control parameters, the operation of the terminal air system is controlled according to environmental parameters, including: when the control parameter is indoor dew point temperature, detecting the floor surface temperature; when the indoor dew point temperature is close to the floor surface temperature, controlling the supply air valve and return air valve to open, and controlling the terminal fan to operate at a low speed; when the control parameter is indoor temperature, detecting the floor surface temperature; when the indoor dew point temperature is higher than the floor surface temperature, controlling the supply air valve and return air valve to open, and controlling the speed of the terminal fan according to the indoor temperature; when the control parameter is indoor fresh air volume, detecting the floor surface temperature; when the indoor dew point temperature is higher than the floor surface temperature but lower than the set temperature, controlling the fresh air valve to open, and controlling the speed of the terminal fan according to the gas concentration in the air.

[0020] According to another aspect of the present invention, a storage medium containing computer-executable instructions is provided, which, when executed by a computer processor, are used to perform the air conditioning control method as described above.

[0021] This invention provides a layered energy storage floor radiant air conditioning system, which divides the radiant floor into two layers. When there is a load demand in the room, the cooling energy is radiated into the room through the upper radiant layer coils. When there is no load in the room and the electricity price is in a low period, the cooling energy is stored through the lower energy storage layer coils. During peak electricity price periods and when there is a load demand, the cooling energy is provided to the radiant layer coils, thereby "unloading" electricity from peak electricity demand to low periods and reducing the operating cost of the radiant air conditioning system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an optional structure of a conventional radiant air conditioning system according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of another optional structure of the independent Feng Shui system according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of an optional structure of a radiant air conditioning system according to an embodiment of the present invention;

[0025] Figure 4 This is an optional flowchart of a radiant air conditioning system control method according to an embodiment of the present invention;

[0026] Figure 5 This is an optional structural block diagram of a radiant air conditioning system control device according to an embodiment of the present invention;

[0027] Figure 6 This is an optional schematic diagram of the collection module and setting parameters according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram illustrating an optional connection between the adjustment module and the controlled component according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Radiant layer coil; 2. Energy storage layer coil; 3. Liquid pump; 4. First electronic expansion valve; 5. First control valve; 6. Terminal air system; 7. Outdoor condenser; 8. Second electronic expansion valve; 9. Air pump; 10. Third electronic expansion valve; 11. Second control valve; 12. First regulating valve; 13. Third control valve; 14. Second regulating valve; 15. Fan; 16. Low temperature module; 17. DC inverter duct air conditioner; 18. Radiant floor. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0033] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0034] It should be understood that although the terms first, second, third, etc., may be used to describe controllers in embodiments of the present invention, these controllers should not be limited to these terms. These terms are only used to distinguish controllers connected to different devices. For example, without departing from the scope of embodiments of the present invention, a first controller may also be referred to as a second controller, and similarly, a second controller may also be referred to as a first controller.

[0035] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0036] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0037] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0038] Example 1

[0039] Conventional radiant air conditioning systems consist of a chiller / heat source unit, a distribution system, a dehumidification and fresh air system, and an intelligent control system. There are two types: combined cooling and heating (CCHP) and independent air-water systems. In the CCHP type, the air and water systems share a single chiller / heat source. During cooling periods, the air system provides cooling and dehumidification, while during heating periods, the floor radiant system provides heating. The distribution system consists of water pumps and terminal radiant panels. (Details are omitted as they are not relevant to the main text.) Figure 1 As shown.

[0040] An independent feng shui system has separate cooling sources for the air and water systems, allowing them to operate simultaneously during either cooling or heating seasons. This provides greater flexibility in adjusting system comfort. Specifically, for example... Figure 2 As shown.

[0041] Both the air system and the water system in this invention provide cooling capacity. Figure 3 This diagram illustrates one possible structural design of the radiant air conditioning system, such as... Figure 3 As shown, the radiant air conditioning system includes:

[0042] Radiant floor, the radiant floor includes radiant layer coil 1 and energy storage layer coil 2, wherein radiant layer coil 1 is located on the upper layer of energy storage layer coil 2. Radiant layer coil 1 is used to provide cooling capacity to the room when there is load demand. Energy storage layer coil 2 is used to store cold during the off-peak hours of electricity price and when there is no load demand, and to provide cooling capacity to radiant layer coil 1 during the peak hours of electricity price and when there is load demand.

[0043] In the above embodiments, a layered energy storage floor radiant air conditioning system is provided, which divides the radiant floor into two layers. When there is a load demand in the room, the cooling energy is radiated into the room through the upper radiant layer coil. When there is no load in the room and the electricity price is in a low period, the cooling energy is stored through the lower energy storage layer coil. During the peak electricity price period and when there is a load demand, the cooling energy is provided to the radiant layer coil, thereby realizing the "unloading" of electricity from the peak period to the low period and reducing the operating cost of the radiant air conditioning system.

[0044] Preferably, the radiant layer coil 1 and the energy storage layer coil 2 are separated by thermal insulation material. The insulation between the upper and lower layers can avoid the risk of condensation on the ground caused by cold storage in the cooling mode, and effectively improve the comfort of the floor.

[0045] The radiant air conditioning system in this invention is an air conditioning system that combines an energy storage module with an air pump 9 and a liquid pump 3, such as... Figure 3 As shown, it includes: a liquid pump 3, one end of which is connected to the refrigerant outlet of the energy storage layer coil 2, and the other end of which is connected to the refrigerant inlet of the radiation layer coil 1 through a first electronic expansion valve 4, for compressing the refrigerant at the refrigerant outlet of the energy storage layer coil 2 and then throttling it through the electronic expansion valve before entering the radiation layer coil 1; a first electronic expansion valve 4, located on the pipeline between the liquid pump 3 and the radiation layer coil 1; and a first control valve 5, located on the pipeline between the energy storage layer coil 2 and the liquid pump 3, for controlling the opening and closing of the pipeline between the energy storage layer coil 2 and the liquid pump 3.

[0046] Radiant floor cooling systems use high-temperature water, typically 18-20°C. During the day, the system releases stored cooling energy from its energy storage layer and supplies cooling to the room, handling most of the sensible heat load and lowering the indoor temperature.

[0047] After passing through the energy storage coil 2, the gaseous refrigerant cools down and becomes liquid refrigerant. After passing through the first control valve and being compressed by the liquid pump 3, it enters the radiation layer coil 1 through the first electronic expansion valve, absorbs heat, and becomes gaseous refrigerant, completing one refrigeration cycle.

[0048] The terminal air system 6 in this invention is used to deliver fresh air to the room and provide cool air to supplement the required cooling capacity of the room.

[0049] Specifically, the terminal air system 6 includes: a fresh air unit for supplying fresh air to the room, the fresh air unit including at least a fresh air duct, a fresh air valve, a supply air valve, a return air valve and a terminal fan; and an air-cooling unit for providing cool air to the room to supplement the required cooling capacity, the air-cooling unit including at least a supply air heat exchanger, an outdoor condenser 7, a second electronic expansion valve 8 and an air pump 9. The outdoor condenser 7 is connected to the supply air heat exchanger through the second electronic expansion valve 8 to provide cool air to the room, and then connected to the outdoor condenser 7 through the air pump 9 to form a refrigerant circulation loop.

[0050] Terminal air systems fulfill three functions: ① introducing outdoor fresh air to meet indoor fresh air volume requirements; ② handling indoor humidity load; ③ compensating for insufficient radiant cooling capacity of the radiant system and handling the remaining sensible heat load indoors. Therefore, terminal air systems need to handle all latent heat and sensible heat loads of outdoor fresh air, while also bearing all latent heat loads and part of the sensible heat load indoors, ensuring indoor air temperature, humidity, and CO2 concentration, and avoiding condensation and excessively high CO2 concentrations.

[0051] Furthermore, the refrigerant inlet of the energy storage coil 2 is also connected to the condenser outlet of the outdoor condenser 7 via a third electronic expansion valve, and the refrigerant outlet of the energy storage coil 2 is also connected to the refrigerant inlet of the air pump 9, for utilizing the electricity price difference to store cold during off-peak electricity periods. A second control valve 11, located on the pipeline between the condenser outlet of the outdoor condenser 7 and the third electronic expansion valve, is used to control the on / off state of the pipeline between the energy storage coil 2 and the liquid pump 3; a first regulating valve, located on the pipeline between the third electronic expansion valve and the energy storage coil 2, is used to regulate the cooling capacity of the energy storage coil 2. A third control valve 13 is also included, located on the pipeline between the refrigerant outlet of the energy storage coil 2 and the air pump 9.

[0052] The gaseous refrigerant is compressed into a high-pressure, high-temperature gas by the gas pump and enters the outdoor condenser for heat exchange. After the refrigerant condenses into a high-pressure liquid refrigerant, it passes through the second control valve, the third electronic expansion valve for throttling, and the first regulating valve in sequence before entering the energy storage layer coil to absorb heat and store the cooling capacity in the energy storage layer coil. The refrigerant is then drawn into the compressor through the valve, and the cycle continues. The cooling fan runs synchronously during system operation.

[0053] The energy storage coil 2 also exchanges heat with the outdoor condenser 7, using the stored cooling capacity to lower the condensing temperature of the outdoor condenser 7 and improve the energy efficiency of the terminal air system 6. The circulation between the energy storage coil and the outdoor condenser can be a separate loop or an improvement on an existing loop, such as... Figure 3 As shown, the outdoor condenser exchanges heat with the heat exchange tubes, which are connected to the energy storage layer coil, the first control valve, the liquid pump, and the third electronic expansion valve, forming a circulation loop through the second regulating valve.

[0054] The layered phase change energy storage system of this invention solves the problem of asynchronous operation between the system's off-peak electricity price period and the actual demand load period. By utilizing the price difference between peak, flat, and off-peak electricity periods, it stores energy during the off-peak period, uses the low electricity price during the off-peak period for energy storage, and releases energy during the load period, thus achieving cost-effective operation of the system. For operating conditions that require dehumidification and supplemental cooling of the air system and cooling of the floor radiant system, a cooling system combining air pumps and liquid pumps is proposed to achieve high-quality and low-energy-consumption operation of the system.

[0055] Example 2

[0056] Based on the radiant air conditioning system provided in Embodiment 1 above, a preferred embodiment 2 of the present invention further provides a radiant air conditioning system control method, specifically, Figure 4 An optional flowchart of the method is shown, such as Figure 4 As shown, the method includes the following steps S402-S406:

[0057] S402: Obtain the current operating period of the radiant air conditioning system and determine whether there is a load demand;

[0058] S404: When the current operating period is a low electricity price period and there is no load demand, control the energy storage layer coil of the radiant floor to store cold;

[0059] S406: When the current operating period is during a peak electricity price period and there is load demand, the energy storage layer coil is used to provide cooling capacity to the radiant layer coil.

[0060] In the above embodiments, a layered energy storage floor radiant air conditioning system is provided, which divides the radiant floor into two layers. When there is a load demand in the room, the cooling energy is radiated into the room through the upper radiant layer coil. When there is no load in the room and the electricity price is in a low period, the cooling energy is stored through the lower energy storage layer coil. During the peak electricity price period and when there is a load demand, the cooling energy is provided to the radiant layer coil, thereby realizing the "unloading" of electricity from the peak period to the low period and reducing the operating cost of the radiant air conditioning system.

[0061] Based on the radiant air conditioning system in Embodiment 1 above, controlling the energy storage layer coil of the radiant floor to store cold includes: controlling the opening of the third electronic expansion valve, the second control valve and the first regulating valve; using the energy storage layer coil to provide cooling capacity to the radiant layer coil includes: controlling the opening of the first electronic expansion valve and the first control valve.

[0062] The gaseous refrigerant is compressed into a high-pressure, high-temperature gas by the gas pump and enters the outdoor condenser for heat exchange. After the refrigerant condenses into a high-pressure liquid refrigerant, it passes through the second control valve, the third electronic expansion valve for throttling, and the first regulating valve in sequence before entering the energy storage layer coil to absorb heat and store the cooling capacity in the energy storage layer coil. The refrigerant is then drawn into the compressor through the valve, and the cycle continues. The cooling fan runs synchronously during system operation.

[0063] The above control method also includes: detecting environmental parameters; wherein the environmental parameters include at least indoor dew point temperature and floor surface temperature; and controlling the operation of the terminal ventilation system based on the environmental parameters.

[0064] Specifically, controlling the operation of the terminal ventilation system based on environmental parameters includes: determining the priority of the control parameters for the terminal ventilation system; and controlling the operation of the terminal ventilation system according to the priority of the control parameters and the environmental parameters. The priority of the control parameters, from highest to lowest, is: indoor dew point temperature, indoor temperature, and indoor fresh air volume. Controlling the operation of the terminal ventilation system according to the priority of the control parameters and the environmental parameters includes:

[0065] When the control parameter is the indoor dew point temperature, the floor surface temperature is detected. When the indoor dew point temperature is close to the floor surface temperature, the supply air valve and return air valve are opened, and the terminal fan is controlled to run at a low speed.

[0066] When the control parameter is the indoor temperature, the floor surface temperature is detected. When the indoor dew point temperature is greater than the floor surface temperature, the supply air valve and return air valve are opened, and the speed of the terminal fan is controlled according to the indoor temperature.

[0067] When the control parameter is the indoor fresh air volume, the floor surface temperature is detected. When the indoor dew point temperature is greater than the floor surface temperature but less than the set temperature, the fresh air valve is opened, and the speed of the terminal fan is controlled according to the gas concentration in the air, such as CO2 concentration.

[0068] In a preferred embodiment 2 of the present invention, a radiant air conditioning system control device is also provided, specifically... Figure 5 An alternative structural block diagram of the device is shown, such as... Figure 5 As shown, the device includes:

[0069] Collection module: Used to collect the system's automatic adjustment settings, convert the collected parameters, and transmit them to the judgment module;

[0070] Judgment module: Determines whether the program conditions are met, calculates system-set parameters, and if the conditions are met, issues the corresponding control command to the adjustment module;

[0071] Adjustment module: Based on the instructions from the judgment module, it outputs control commands to the lower control devices.

[0072] Figure 6 This diagram illustrates one possible configuration of the collection module and its settings, such as... Figure 6 As shown, this collection module collects data on indoor load time periods, peak and off-peak electricity prices, surface temperature of the radiation layer, temperature of the energy storage layer, and outdoor temperature and humidity.

[0073] Figure 7 This diagram illustrates one possible connection between the adjustment module and the controlled component, such as... Figure 7 As shown, this adjustment module can automatically switch between the system's air pump, liquid pump, and valves, achieving automated system adjustment and reducing labor costs.

[0074] The specific manner in which the device performs operations in the above embodiments has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0075] Example 3

[0076] Based on the radiant air conditioning system control method provided in Embodiment 2 above, in a preferred embodiment 3 of the present invention, a storage medium containing computer-executable instructions is also provided, which, when executed by a computer processor, is used to execute the air conditioning control method as described above.

[0077] In the above embodiments, a layered energy storage floor radiant air conditioning system is provided, which divides the radiant floor into two layers. When there is a load demand in the room, the cooling energy is radiated into the room through the upper radiant layer coil. When there is no load in the room and the electricity price is in a low period, the cooling energy is stored through the lower energy storage layer coil. During the peak electricity price period and when there is a load demand, the cooling energy is provided to the radiant layer coil, thereby realizing the "unloading" of electricity from the peak period to the low period and reducing the operating cost of the radiant air conditioning system.

[0078] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented by the invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0079] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A radiant air conditioning system, characterized in that, include: Radiant floor, the radiant floor includes radiant layer coil (1) and energy storage layer coil (2), wherein the radiant layer coil (1) is located above the energy storage layer coil (2), the radiant layer coil (1) is used to provide cooling capacity to the room when there is load demand, and the energy storage layer coil (2) is used to store cold during the off-peak hours of electricity price and when there is no load demand, and to provide cooling capacity to the radiant layer coil (1) during the peak hours of electricity price and when there is load demand; The liquid pump (3) is connected at one end to the refrigerant outlet of the energy storage layer coil (2) and at the other end to the refrigerant inlet of the radiation layer coil (1) through the first electronic expansion valve. It is used to compress the refrigerant at the refrigerant outlet of the energy storage layer coil (2) and then throttle it through the electronic expansion valve before entering the radiation layer coil (1). The first electronic expansion valve (4) is located on the pipeline between the liquid pump (3) and the radiation layer coil (1); The first control valve (5) is located on the pipeline between the energy storage coil (2) and the liquid pump (3) and is used to control the opening and closing of the pipeline between the energy storage coil (2) and the liquid pump (3); The air-cooled device is used to provide cold air to supplement the required cooling capacity of the room. The air-cooled device includes at least an air supply heat exchanger, an outdoor condenser (7), a second electronic expansion valve (8), and an air pump (9). The outdoor condenser (7) is connected to the air supply heat exchanger through the second electronic expansion valve (8) to provide cold air to the room. Then, it is connected to the outdoor condenser (7) through the air pump (9) to form a refrigerant circulation loop. The refrigerant inlet of the energy storage coil (2) is also connected to the condensation outlet of the outdoor condenser (7) through the third electronic expansion valve (10), and the refrigerant outlet of the energy storage coil (2) is also connected to the refrigerant inlet of the air pump (9) for storing cold during periods of low electricity prices by taking advantage of the price difference.

2. The radiant air conditioning system according to claim 1, characterized in that, The radiation layer coil (1) and the energy storage layer coil (2) are separated by a heat insulation material.

3. The radiant air conditioning system according to claim 1, characterized in that, Also includes: Terminal air system (6) is used to deliver fresh air to the room and provide cool air to supplement the required cooling capacity of the room.

4. The radiant air conditioning system according to claim 3, characterized in that, The terminal air system (6) includes: A fresh air system is used to supply fresh air to an indoor space. The fresh air system includes at least a fresh air duct, a fresh air valve, a supply air valve, a return air valve, and a terminal fan. The air-cooling device.

5. The radiant air conditioning system according to claim 4, characterized in that, Also includes: The second control valve (11) is located on the pipeline between the condensation outlet of the outdoor condenser (7) and the third electronic expansion valve (10), and is used to control the opening and closing of the pipeline between the energy storage layer coil (2) and the liquid pump (3); The first regulating valve (12) is located on the pipeline between the third electronic expansion valve (10) and the energy storage layer coil (2) and is used to regulate the cooling capacity of the energy storage layer coil (2).

6. The radiant air conditioning system according to claim 4, characterized in that, The energy storage layer coil (2) also exchanges heat with the outdoor condenser (7) to reduce the condensing temperature of the outdoor condenser (7) by using the stored cold energy, thereby improving the energy efficiency of the terminal air system (6).

7. A control method for a radiant air conditioning system, applied to the radiant air conditioning system as described in any one of claims 1 to 6, characterized in that, The method includes: Obtain the current operating period of the radiant air conditioning system and determine whether there is a load demand; When the current operating period is a low electricity price period and there is no load demand, the energy storage layer coils of the radiant floor are controlled to store cold; When the current operating period is during a peak electricity price period and there is load demand, the energy storage layer coil is used to provide cooling capacity for the radiant layer coil.

8. The method according to claim 7, characterized in that, The radiant air conditioning system includes a second control valve and a first regulating valve; the second control valve is located on the pipeline between the condenser outlet of the outdoor condenser and the third electronic expansion valve, and is used to control the opening and closing of the pipeline between the energy storage layer coil and the liquid pump; the first regulating valve is located on the pipeline between the third electronic expansion valve and the energy storage layer coil, and is used to regulate the cooling capacity of the energy storage layer coil. The control of the energy storage layer coil of the radiant floor includes: controlling the opening of the third electronic expansion valve, the second control valve and the first regulating valve; The method of using the energy storage layer coil to provide cooling to the radiation layer coil includes: controlling the opening of the first electronic expansion valve and the first control valve.

9. The method according to claim 7, characterized in that, The radiant air conditioning system includes a terminal air system, which is used to deliver fresh air to the room and provide cool air to supplement the required cooling capacity of the room. Also includes: Detect environmental parameters; wherein, the environmental parameters include at least the indoor dew point temperature and the floor surface temperature; The operation of the terminal ventilation system is controlled based on the environmental parameters.

10. The method according to claim 9, characterized in that, Controlling the operation of the terminal ventilation system based on the environmental parameters includes: Determine the priority of the control parameters of the terminal air system; The operation of the terminal ventilation system is controlled according to the priority of the control parameters and the environmental parameters.

11. The method according to claim 10, characterized in that, The control parameters, from highest to lowest priority, are: indoor dew point temperature, indoor temperature, and indoor fresh air volume. The operation of the terminal ventilation system is controlled according to the environmental parameters based on these priorities, including: When the control parameter is the indoor dew point temperature, the floor surface temperature is detected. When the indoor dew point temperature is close to the floor surface temperature, the supply air valve and return air valve are opened, and the terminal fan is controlled to run at a low speed. When the control parameter is the indoor temperature, the floor surface temperature is detected. When the indoor dew point temperature is greater than the floor surface temperature, the supply air valve and return air valve are opened, and the speed of the terminal fan is controlled according to the indoor temperature. When the control parameter is the indoor fresh air volume, the floor surface temperature is detected. When the indoor dew point temperature is greater than the floor surface temperature but less than the set temperature, the fresh air valve is opened, and the speed of the terminal fan is controlled according to the gas concentration in the air.

12. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the radiant air conditioning system control method as described in any one of claims 7 to 11.

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