A dual variable water temperature control method for air conditioning water system

Abstract

The present invention relates to the field of temperature control of air-conditioning water systems, and specifically to a dual variable water temperature control method for air-conditioning water systems; the method detects the real-time temperature of a room and a set value of the room temperature in real time, obtains a demand duty cycle according to the time when a cooling or heating demand corresponding to the mode exists in the room, and adjusts the set water temperature of a system heat pump host according to a first temperature difference and the demand duty cycle; sets a radiation inlet water temperature correction value according to a range of the demand duty cycle, a first temperature difference, and a range of the difference between the real-time temperature of the current room and the real-time temperature of the room before the acquisition cycle, and adjusts the set water temperature change of the air-conditioning water system and the radiation inlet water temperature change according to the indoor temperature change; solves the problem in the prior art that an unreasonable fixed water temperature setting temperature easily leads to an unsatisfactory temperature control effect, and solves the problem that when the water supply temperature of the current radiation panel is conventionally controlled near the dew point temperature, energy consumption easily increases.

Description

Technical Field

[0001] The present invention relates to the field of temperature control of air-conditioning water systems, and in particular to a dual variable water temperature control method for air-conditioning water systems. Background Art

[0002] At present, the water temperature setting temperature of the heat pump main unit of the central air-conditioning water system installed in most buildings in the city is a fixed value, which needs to be manually adjusted according to demand. However, in actual operation, the indoor load will change according to the outdoor environment and the number of people indoors. If the set water temperature setting temperature is unreasonable, on the one hand, it will cause the heat pump main unit to always run at full load, causing unnecessary energy waste. On the other hand, it will cause the indoor temperature to fail to reach expectations and fail to achieve the preset indoor cooling or heating effect.

[0003] In addition, the current control of the water supply temperature of the radiation panel is generally controlled near the dew point temperature. Although this can achieve the cooling and anti-condensation effect, it will make people feel uncomfortable in some low-humidity environments and is not energy-saving. In addition, the radiation water valve will be closed during operation, and the water temperature fluctuates greatly, which has a great impact on the entire air-conditioning system. The air conditioner cannot automatically control the operating load of the unit according to the indoor temperature, which wastes resources and increases energy consumption. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a dual variable water temperature control method for an air-conditioning water system, which solves the problem in the existing technology that if the water temperature setting temperature is unreasonable and the temperature control effect is not ideal, and when the water supply temperature of the current radiation panel is conventionally controlled near the dew point temperature, energy consumption is easily increased.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A dual variable water temperature control method for an air conditioning water system, the method comprising the following steps:

[0007] S1. Periodically obtain the real-time temperature of all rooms with thermostats turned on, the duration corresponding to different real-time temperatures, the temperature set value, the current radiant water inlet temperature and the current water temperature set value, as well as basic data on whether the room is in cooling mode or heating mode;

[0008] S2. Calculate, based on the basic data, the ratio of the time during which the room has a cooling or heating demand corresponding to the current mode to the collection period to obtain a demand duty cycle.

[0009] S3. Calculate a first temperature difference between the real-time temperature and the temperature setting value, set a water temperature correction value based on the required duty cycle range, the cooling and heating modes of the room, and the first temperature difference, calculate the sum of the water temperature setting value and the water temperature correction value to obtain a water temperature adjustment value, and send it to the heat pump host;

[0010] S4. Set the radiation inlet water temperature correction value according to the demand duty cycle range, the first temperature difference, and the range of the difference between the current room's real-time temperature and the room's real-time temperature before the collection period, and calculate the sum of the radiation inlet water temperature and the radiation inlet water temperature correction value to obtain the radiation inlet water temperature adjustment value and send it to the water mixing center.

[0011] Preferably, in step S2, the following steps are specifically included:

[0012] S21, defining the demand in the cooling mode as the real-time temperature in the room being greater than or equal to the temperature setting value;

[0013] S22, defining the demand in the heating mode as the real-time temperature in the room being less than or equal to the temperature setting value;

[0014] S23. Calculate the ratio of the time with demand to the total time of the collection period in the current collection period to obtain the demand duty cycle.

[0015] Preferably, in step S3, the following steps are specifically included:

[0016] S31, calculating the difference between the real-time temperature in the room and the temperature setting value to obtain a first temperature difference;

[0017] The calculation formula for the first temperature difference is:

[0018] ΔT1=T SPT -T SPTSet

[0019] In the above formula, ΔT1 represents the first temperature difference, T SPT Indicates the real-time temperature in the room, T SPTSet Indicates the temperature setting value;

[0020] S32, determining whether the room is in cooling mode;

[0021] If yes, proceed to step S33;

[0022] If not, proceed to step S36;

[0023] S33, determining whether the demand duty cycle is equal to 1;

[0024] If yes, proceed to step S34;

[0025] If not, proceed to step S35;

[0026] S34, setting a first temperature difference threshold and a first compensation value, and determining whether the first temperature difference is less than or equal to the first temperature difference threshold;

[0027] If so, set the water temperature correction value to 0;

[0028] If not, the water temperature correction value is set to the first compensation value;

[0029] S35, setting a first demand duty cycle threshold and a second compensation value, and determining whether the demand duty cycle is less than the first demand duty cycle threshold;

[0030] If so, the water temperature correction value is set to the second compensation value;

[0031] If not, set the water temperature correction value to 0;

[0032] S36, determining whether the demand duty cycle is equal to 1;

[0033] If yes, proceed to step S37;

[0034] If not, proceed to step S38;

[0035] S37, setting a second temperature difference threshold and a third compensation value, and determining whether the first temperature difference is greater than or equal to the second temperature difference threshold;

[0036] If so, set the water temperature correction value to 0;

[0037] If not, the water temperature correction value is set to the first compensation value;

[0038] S38, setting a second demand duty cycle threshold and a fourth compensation value, and determining whether the demand duty cycle is less than the second demand duty cycle threshold;

[0039] If so, the water temperature correction value is set to the fourth compensation value;

[0040] If not, set the water temperature correction value to 0;

[0041] S39: Calculate the sum of the water temperature correction value and the water temperature set value to obtain a water temperature adjustment value, and send it to the heat pump host.

[0042] Preferably, in step S4, the following steps are specifically included:

[0043] S41, determining whether the room is in cooling mode and the demand duty cycle is 1;

[0044] If yes, proceed to step S42;

[0045] If not, then end;

[0046] S42, calculating the difference between the current real-time room temperature and the real-time room temperature before the acquisition period to obtain a second temperature difference;

[0047] S43, setting a first radiation water inlet temperature compensation value and a second radiation water inlet temperature compensation value;

[0048] S44, determining whether the first temperature difference is less than or equal to a third temperature difference threshold;

[0049] If yes, proceed to step S45;

[0050] If not, proceed to step S46;

[0051] S45, setting a fifth threshold, and determining whether the second temperature difference is less than or equal to the fifth threshold;

[0052] If so, the radiation inlet water temperature correction value is set to the first radiation inlet water temperature compensation value;

[0053] If not, then set the radiation inlet water temperature correction value to the second radiation inlet water temperature compensation value;

[0054] S46, setting the radiation inlet water temperature correction value to a second radiation inlet water temperature compensation value;

[0055] S47. Calculate the sum of the radiation inlet water temperature and the radiation inlet water temperature correction value to obtain the radiation inlet water temperature adjustment value and send it to the water mixing center.

[0056] Compared with the prior art, the present invention provides a dual variable water temperature control method for an air conditioning water system, which has the following beneficial effects:

[0057] 1. The present invention detects the real-time room temperature and the room temperature setting value in real time, obtains the demand duty cycle according to the time when the cooling or heating demand corresponding to the mode exists in the room, and adjusts the set water temperature of the system heat pump host according to the first temperature difference and the demand duty cycle to ensure that the operation of the heat pump host can meet the indoor load demand.

[0058] 2. The present invention sets the radiation inlet water temperature correction value according to the demand duty cycle range, the first temperature difference, and the range of the difference between the current room's real-time temperature and the room's real-time temperature before the collection period, and adjusts the air-conditioning water system's set water temperature change and the radiation inlet water temperature change according to the indoor temperature change, thereby reducing the excess energy consumption of the air conditioner under different load conditions, saving energy while ensuring the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0060] Figure 1 This is a flow chart of the dual variable water temperature control method for an air conditioning water system according to the present invention. DETAILED DESCRIPTION

[0061] To make the above-mentioned objectives, features, and advantages of the present invention more clearly understood, the present invention is further described below in detail with reference to the accompanying drawings and specific embodiments. This will enable a full understanding of how this application uses technical means to solve technical problems and achieve technical effects, and to implement the invention accordingly.

[0062] Those skilled in the art will appreciate that all or part of the steps in the following embodiments can be accomplished by instructing related hardware through a program. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0063] In order to solve the problem in the prior art that an unreasonable fixed water temperature setting may easily lead to unsatisfactory temperature control effects, and that the water temperature of the current radiant panel supply water is conventionally controlled near the dew point temperature, which may easily increase energy consumption, the present invention provides a dual variable water temperature control method for an air-conditioning water system, which detects the real-time room temperature and the room temperature setting value in real time, adjusts the set water temperature of the system heat pump host and the target water temperature of the radiant water inlet according to the difference in indoor temperature changes, and adjusts the set water temperature change of the air-conditioning water system and the radiant water inlet temperature change according to the indoor temperature changes, thereby reducing the redundant energy consumption of the air-conditioning under different load conditions, saving energy while ensuring user comfort. The method specifically comprises the following steps:

[0064] S1. Periodically obtain the real-time temperature of all rooms with thermostats turned on, the duration corresponding to different real-time temperatures, the temperature set value, the current radiant water inlet temperature and the current water temperature set value, as well as basic data on whether the room is in cooling mode or heating mode;

[0065] S2. Calculate the ratio of the time during which the room has cooling or heating demand corresponding to the current mode to the collection period based on the basic data to obtain the demand duty cycle. For example, in cooling mode, the collection period is set to 10 minutes. If the room thermostat has a room temperature of 27°C for 4 minutes and a room temperature of 25°C for 6 minutes within 10 minutes, and the room temperature set point is 26°C, then the cooling demand time is 4 minutes and the demand duty cycle is 4 / 10 = 0.4. Therefore, step S2 specifically includes the following steps:

[0066] S21, defining the demand in the cooling mode as the real-time temperature in the room being greater than or equal to the temperature setting value;

[0067] S22, defining the demand in the heating mode as the real-time temperature in the room being less than or equal to the temperature setting value;

[0068] S23. Calculate the ratio of the time with demand to the total time of the collection period in the current collection period to obtain the demand duty cycle.

[0069] S3. Calculate a first temperature difference between the real-time temperature and the temperature setting value, set a water temperature correction value based on the required duty cycle range, the cooling and heating modes of the room, and the first temperature difference, calculate the sum of the water temperature setting value and the water temperature correction value to obtain a water temperature adjustment value, and send it to the heat pump host;

[0070] In step S3, the following steps are specifically included:

[0071] S31, calculating the difference between the real-time temperature in the room and the temperature setting value to obtain a first temperature difference;

[0072] The calculation formula for the first temperature difference is:

[0073] ΔT1=SPT-SPTSet

[0074] In the above formula, ΔT1 represents the first temperature difference, SPT represents the real-time temperature in the room, and SPTSet represents the temperature setting value;

[0075] S32, determining whether the room is in cooling mode;

[0076] If yes, proceed to step S33;

[0077] If not, proceed to step S36;

[0078] S33, determining whether the demand duty cycle is equal to 1;

[0079] If yes, proceed to step S34;

[0080] If not, proceed to step S35;

[0081] S34. Set a first temperature difference threshold and a first compensation value, and determine whether the first temperature difference is less than or equal to the first temperature difference threshold. In actual use, the first temperature difference threshold is generally set to 0.5° C., and the first compensation value is generally set to -0.5° C.;

[0082] If so, set the water temperature correction value to 0;

[0083] If not, the water temperature correction value is set to the first compensation value;

[0084] S35. Set a first demand duty cycle threshold and a second compensation value, and determine whether the demand duty cycle is less than the first demand duty cycle threshold; the first demand duty cycle threshold is set to 0.7 when actually used, and the second compensation value is set to 0.5°C.

[0085] If so, the water temperature correction value is set to the second compensation value;

[0086] If not, set the water temperature correction value to 0;

[0087] S36, determining whether the demand duty cycle is equal to 1;

[0088] If yes, proceed to step S37;

[0089] If not, proceed to step S38;

[0090] S37. Set a second temperature difference threshold and a third compensation value, and determine whether the first temperature difference is greater than or equal to the second temperature difference threshold. In actual use, the second temperature difference threshold is generally set to -0.5°C, and the third compensation value is generally set to 0.5°C.

[0091] If so, set the water temperature correction value to 0;

[0092] If not, the water temperature correction value is set to the first compensation value;

[0093] S38. Set a second demand duty cycle threshold and a fourth compensation value, and determine whether the demand duty cycle is less than the second demand duty cycle threshold; the first demand duty cycle threshold is actually set to 0.7, and the fourth compensation value is set to -0.5°C.

[0094] If so, the water temperature correction value is set to the fourth compensation value;

[0095] If not, set the water temperature correction value to 0;

[0096] S39: Calculate the sum of the water temperature correction value and the water temperature set value to obtain a water temperature adjustment value, and send it to the heat pump host.

[0097] In general, in cooling mode, it can be summarized as shown in Table 1, and in heating mode, it can be summarized as shown in Table 2.

[0098]

[0099]

[0100] In Table 1, Ton is the time when there is demand after the room thermostat is turned on within the collection period (taking 10 minutes as an example), in minutes;

[0101] △T is the first temperature difference;

[0102] The cooling duty cycle "on demand" is defined as SPT ≥ SPTSet;

[0103] The cooling duty cycle "no demand" is defined as SPT < SPTSet;

[0104] Heating duty cycle "on demand" definition: when SPT ≤ SPTSet;

[0105] Heating duty cycle "no demand" definition: when SPT>SPTSet;

[0106] SPT: real-time room temperature;

[0107] SPTSet: room set temperature;

[0108] FixC: Set water temperature correction value in cooling mode;

[0109] FixH: set water temperature correction value in heating mode;

[0110] S4. Set the radiation inlet water temperature correction value according to the demand duty cycle range, the first temperature difference, and the range of the difference between the current room's real-time temperature and the room's real-time temperature before the collection period, and calculate the sum of the radiation inlet water temperature and the radiation inlet water temperature correction value to obtain the radiation inlet water temperature adjustment value and send it to the water mixing center.

[0111] In step S4, the following steps are specifically included:

[0112] S41, determining whether the room is in cooling mode and the demand duty cycle is 1;

[0113] If yes, proceed to step S42;

[0114] If not, then end;

[0115] S42, calculating the difference between the current real-time room temperature and the real-time room temperature before the acquisition period to obtain a second temperature difference;

[0116] S43, setting a first radiation water inlet temperature compensation value and a second radiation water inlet temperature compensation value;

[0117] S44, determining whether the first temperature difference is less than or equal to a third temperature difference threshold; the third temperature difference threshold is generally set to 0.5°C;

[0118] If yes, proceed to step S45;

[0119] If not, proceed to step S46;

[0120] S45. Set a fifth threshold and determine whether the second temperature difference is less than or equal to the fifth threshold; the fifth threshold is generally 0° C., and the first radiation water inlet temperature compensation value and the second radiation water inlet temperature compensation value are 0.5° C. and -0.5° C., respectively;

[0121] If so, the radiation inlet water temperature correction value is set to the first radiation inlet water temperature compensation value;

[0122] If not, then set the radiation inlet water temperature correction value to the second radiation inlet water temperature compensation value;

[0123] S46, setting the radiation inlet water temperature correction value to a second radiation inlet water temperature compensation value;

[0124] S47. Calculate the sum of the radiation inlet water temperature and the radiation inlet water temperature correction value to obtain the radiation inlet water temperature adjustment value and send it to the water mixing center.

[0125] The method mentioned in step S4 can be summarized in Table 3 below,

[0126]

[0127] In Table 3:

[0128] Ton: The time when demand is present within the collection period (taking 10 minutes as an example) after the room thermostat is turned on, in minutes.

[0129] △T is the second temperature difference;

[0130] △SPT=SPT-SPT(previous);

[0131] SPT(previous): The real-time temperature of the room before the temperature collection period;

[0132] FixD is the correction value of the radiation inlet water temperature;

[0133] The cooling duty cycle "on demand" is defined as SPT ≥ SPTSet;

[0134] The cooling duty cycle "no demand" is defined as SPT < SPTSet;

[0135] Through the method mentioned in the present invention, the outlet water temperature of the heat pump main unit can be adjusted according to the real-time indoor temperature to ensure that the operation of the heat pump main unit can meet the indoor load demand; the radiation water inlet temperature can also be adjusted through the mixing water center according to the real-time indoor temperature demand and dew point temperature. During operation, there is no need to close the radiation panel water valve in the room. By adjusting the radiation water inlet temperature, the radiation panel cooling demand under different load demands can be met.

[0136] In order to facilitate understanding of the content mentioned in the present invention, the temperature collection period of 10 minutes is taken as an example to further illustrate this solution:

[0137] Example 1: In cooling mode, only room 1 is turned on. Within 10 minutes of turning on the thermostat for room 1, the room temperature is 27°C for 4 minutes and 25°C for 6 minutes. The room set temperature is 26°C. The current set water temperature is 10°C. Then Ton = 4, Ton / 10 = 0.4, FixC = +0.5. At this time, the corrected set water temperature is 10 + 0.5 = 10.5°C. The set water temperature of 10.5°C is sent to the heat pump host.

[0138] Example 2: In cooling mode, only room 2 is turned on. Within 10 minutes of turning on the thermostat for room 2, the room temperature is 27°C for 2 minutes and 25°C for 8 minutes. The room set temperature is 26°C. The current set water temperature is 10°C. Then Ton = 2, Ton / 10 = 0.2, FixC = 0.5. At this time, the corrected set water temperature is 10 + 0.5 = 10.5°C. The set water temperature of 10.5°C is sent to the heat pump host.

[0139] Example 3: In cooling mode, only room 4 is turned on. Within 10 minutes of turning on the thermostat for room 4, the real-time temperature is 26.4°C, the set temperature is 26°C, and the current set water temperature is 10°C. Therefore, Ton = 10, Ton / 10 = 1, and FixC = 0. The corrected set water temperature is 10 + 0 = 10°C, so the set water temperature of the heat pump unit remains unchanged.

[0140] Example 4: In cooling mode, only room 3 is turned on. Within 10 minutes of turning on the thermostat for room 3, the real-time temperature is 27°C, the set temperature is 26°C, and the current set water temperature is 10°C. Therefore, Ton = 10, Ton / 10 = 1, and FixC = -0.5. The corrected set water temperature is 10-0.5 = 10°C, and the set water temperature of 9.5 is sent to the heat pump host.

[0141] Example 5: In cooling mode, when room 1 and room 2 are turned on at the same time, and the correction value of room 1 is greater than that of room 2, according to the principle of correction based on the minimum value, the set temperature of room 2 is sent to the heat pump host, and the set water temperature of the heat pump host remains unchanged.

[0142] Example 6: In heating mode, only room 1 is turned on. Within 10 minutes of turning on the thermostat for room 1, the room temperature is 25°C for 4 minutes and 27°C for 6 minutes. The room set temperature is 26°C. The current set water temperature is 40°C. Therefore, Ton = 4, Ton / 10 = 0.4, FixH = -0.5. The corrected set water temperature is now 40-0.5 = 39.5°C. The set water temperature of 39.5 is then sent to the heat pump host.

[0143] Example 7: In heating mode, only room 2 is turned on. Within 10 minutes of turning on the thermostat for room 2, the room temperature is 25°C for 8 minutes and 27°C for 2 minutes. The room set temperature is 26°C. The current set water temperature is 40°C. Then Ton = 8, Ton / 10 = 0.8, FixH = 0. At this time, the corrected set water temperature is 40 + 0 = 40°C. The set water temperature of the heat pump unit remains unchanged.

[0144] Example 8: In heating mode, only room 4 is turned on. Within 10 minutes of turning on the thermostat for room 4, the real-time room temperature is 26.4°C, the set temperature is 26°C, and the current set water temperature is 40°C. Therefore, Ton = 10, Ton / 10 = 1, and FixH = 0. The corrected set water temperature is 40 + 0 = 40°C, so the set water temperature of the heat pump unit remains unchanged.

[0145] Example 9: In heating mode, only room 3 is turned on. Within 10 minutes of turning on the thermostat in room 3, the real-time temperature in the room is 25°C, the set temperature in the room is 26°C, and the current set water temperature is 40°C. Therefore, Ton = 10, Ton / 10 = 1, FixH = +0.5. The corrected set water temperature is 40 + 0.5 = 40.5°C. The set water temperature of 40.5.5 is sent to the heat pump host.

[0146] Example 10: In heating mode, when room 1 and room 2 are turned on at the same time, and the correction value of room 1 is smaller than that of room 2, according to the principle of correction based on the maximum value, the set temperature of room 2 is sent to the heat pump host, and the set water temperature of the heat pump host remains unchanged.

[0147] Example 11: In cooling mode, only room 1 is turned on. Within 10 minutes of turning on the thermostat for room 1, the room temperature 10 minutes ago was 26.2, the real-time room temperature is 26.4°C, the relative humidity is 55%, the dew point temperature is 16.5°C, the room set temperature is 26°C, and the radiant water inlet temperature is 18°C. Therefore, FixD = -0.5°C, and the radiant water inlet target temperature of 18°C ​​- 0.5 = 17.5°C is sent to the water mixing center.

[0148] Example 12: In cooling mode, only room 2 is turned on. Within 10 minutes of turning on the thermostat for room 2, the room temperature 10 minutes ago was 26.7, the real-time room temperature is 26.4°C, the relative humidity is 55%, the dew point is 16.5°C, the room set temperature is 26°C, and the radiant water inlet temperature is 18°C. Therefore, FixD = +0.5°C, and the radiant water inlet target temperature of 18°C ​​+ 0.5 = 18.5°C is sent to the water mixing center.

[0149] Example 13: In cooling mode, only room 3 is turned on. Within 10 minutes of turning on the thermostat in room 2, the room's real-time temperature is 26.7°C, the relative humidity is 55%, the dew point is 16.5°C, the room's set temperature is 26°C, and the radiant water inlet temperature is 18°C. Therefore, FixD = -0.5°C, and the radiant water inlet target temperature of 18°C ​​- 0.5 = 17.5°C is sent to the water mixing center.

[0150] Example 14: In cooling mode, when room 1 and room 2 are turned on at the same time, the correction value of room 1 is smaller than that of room 2. According to the principle of making corrections based on the minimum correction value, the target radiant water inlet temperature of room 1, 18°C ​​- 0.5 = 17.5°C, is sent to the water mixing center.

[0151] The above embodiments provide a detailed introduction to the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A dual variable water temperature control method for an air conditioning water system, characterized in that: The method comprises the following steps: S1. Periodically obtain the real-time temperature of all rooms with thermostats turned on, the duration corresponding to different real-time temperatures, the temperature set value, the current radiant water inlet temperature and the current water temperature set value, as well as basic data on whether the room is in cooling mode or heating mode; S2. Calculate, based on the basic data, the ratio of the time during which the room has a cooling or heating demand corresponding to the current mode to the collection period to obtain a demand duty cycle. In step S2, the following steps are specifically included: S21, defining the demand in the cooling mode as the real-time temperature in the room being greater than or equal to the temperature setting value; S22, defining the demand in the heating mode as the real-time temperature in the room being less than or equal to the temperature setting value; S23. Calculate the ratio of the time with demand to the total time of the collection period in the current collection period to obtain the demand duty cycle; S3. Calculate a first temperature difference between the real-time temperature and the temperature setting value, set a water temperature correction value based on the required duty cycle range, the cooling and heating modes of the room, and the first temperature difference, calculate the sum of the water temperature setting value and the water temperature correction value to obtain a water temperature adjustment value, and send it to the heat pump host; S4. Set the radiation inlet water temperature correction value according to the demand duty cycle range, the first temperature difference, and the range of the difference between the current room's real-time temperature and the room's real-time temperature before the collection period, and calculate the sum of the radiation inlet water temperature and the radiation inlet water temperature correction value to obtain the radiation inlet water temperature adjustment value and send it to the water mixing center.

2. A dual variable water temperature control method for an air conditioning water system according to claim 1, characterized in that: In step S3, the following steps are specifically included: S31, calculating the difference between the real-time temperature in the room and the temperature setting value to obtain a first temperature difference; The calculation formula for the first temperature difference is: ； In the above formula, represents the first temperature difference, Indicates the real-time temperature in the room. Indicates the temperature setting value; S32, determining whether the room is in cooling mode; If yes, proceed to step S33; If not, proceed to step S36; S33, determining whether the demand duty cycle is equal to 1; If yes, proceed to step S34; If not, proceed to step S35; S34, setting a first temperature difference threshold and a first compensation value, and determining whether the first temperature difference is less than or equal to the first temperature difference threshold; If so, set the water temperature correction value to 0; If not, the water temperature correction value is set to the first compensation value; S35, setting a first demand duty cycle threshold and a second compensation value, and determining whether the demand duty cycle is less than the first demand duty cycle threshold; If so, the water temperature correction value is set to the second compensation value; If not, set the water temperature correction value to 0; S36, determining whether the demand duty cycle is equal to 1; If yes, proceed to step S37; If not, proceed to step S38; S37, setting a second temperature difference threshold and a third compensation value, and determining whether the first temperature difference is greater than or equal to the second temperature difference threshold; If so, set the water temperature correction value to 0; If not, the water temperature correction value is set to the first compensation value; S38, setting a second demand duty cycle threshold and a fourth compensation value, and determining whether the demand duty cycle is less than the second demand duty cycle threshold; If so, the water temperature correction value is set to the fourth compensation value; If not, set the water temperature correction value to 0; S39: Calculate the sum of the water temperature correction value and the water temperature set value to obtain a water temperature adjustment value, and send it to the heat pump host.

3. The dual variable water temperature control method for an air conditioning water system according to claim 1, characterized in that: In step S4, the following steps are specifically included: S41, determining whether the room is in cooling mode and the demand duty cycle is 1; If yes, proceed to step S42; If not, then end; S42, calculating the difference between the current real-time room temperature and the real-time room temperature before the acquisition period to obtain a second temperature difference; S43, setting a first radiation water inlet temperature compensation value and a second radiation water inlet temperature compensation value; S44, determining whether the first temperature difference is less than or equal to a third temperature difference threshold; If yes, proceed to step S45; If not, proceed to step S46; S45, setting a fifth threshold, and determining whether the second temperature difference is less than or equal to the fifth threshold; If so, the radiation inlet water temperature correction value is set to the first radiation inlet water temperature compensation value; If not, then set the radiation inlet water temperature correction value to the second radiation inlet water temperature compensation value; S46, setting the radiation inlet water temperature correction value to a second radiation inlet water temperature compensation value; S47. Calculate the sum of the radiation inlet water temperature and the radiation inlet water temperature correction value to obtain the radiation inlet water temperature adjustment value and send it to the water mixing center.

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