Room temperature linkage control method and device of heat pump water chilling unit and heat pump water chilling unit

Abstract

The invention discloses a room temperature linkage control method and device of a heat pump water chilling unit and the heat pump water chilling unit. The control method comprises the following steps that S1, the heat pump water chilling unit is started to operate; s2, when the heat pump water chilling unit enters the heating control mode, the unit can be started to operate according to the heating mode within the heating allowable operation environment temperature range; s3, when the heat pump water chilling unit enters the refrigeration control mode, the unit can be started to operate according to the refrigeration mode within the refrigeration allowable operation environment temperature range; through room temperature linkage control, the water supply temperature of the heat pump water chilling unit is intelligently and adaptively adjusted, room temperature fluctuation is reduced, a user is prevented from repeatedly adjusting the target water supply temperature, the target room temperature is accurately controlled, and the higher thermal comfort degree of a human body is provided.

Description

Technical Field

[0001] This invention relates to heat pump control technology, and more particularly to a method, device, and heat pump / chiller unit for room temperature linkage control. Background Technology

[0002] In air conditioning systems, heat pumps / chillers provide heating by supplying hot water to the heating terminals of indoor rooms or cooling by supplying chilled water to the cooling terminals of indoor rooms. In practical applications, there are situations where the target supply water temperature needs to be repeatedly adjusted to achieve the desired room temperature for the user.

[0003] During winter heating, if the target water supply temperature is set too low, the room temperature may not reach the desired target room temperature, resulting in poor thermal comfort for the human body. If the target water supply temperature is set too high, the room temperature may be much higher than the desired target room temperature, which will cause the heat pump / chiller unit to operate at an excessively high water temperature, resulting in higher power consumption, less energy saving, and the human body may feel too hot.

[0004] When cooling in summer, if the target water supply temperature is set too high, the room temperature may not reach the desired target room temperature, and the excessively high room temperature will result in poor thermal comfort for the human body. If the target water supply temperature is set too low, the room temperature may be much lower than the desired target room temperature. The heat pump / chiller unit will operate at a lower water temperature, resulting in higher power consumption, energy saving, and the human body may feel too cold.

[0005] This requires repeated adjustments to the target water supply temperature to achieve the desired room temperature for the user. Furthermore, these repeated adjustments cause fluctuations in the operating frequency of the compressor in the heat pump / chiller unit, affecting its reliability and potentially leading to frequent start-stop cycles, which in turn affects thermal comfort and results in a poor user experience. Summary of the Invention

[0006] This invention provides a method, device, and heat pump / chiller unit for room temperature linkage control, which solves the problem that heat pump / chiller units need to repeatedly adjust the target water supply temperature to achieve the desired room temperature for the user. It also considers comfort and energy saving. Through room temperature linkage control, it achieves intelligent adaptive adjustment of the heat pump / chiller unit's water supply temperature, reduces room temperature fluctuations, avoids repeated adjustments to the target water supply temperature, and achieves precise temperature control of the target room, providing higher thermal comfort.

[0007] The technical solution adopted by this invention to solve its technical problem is: A method for room temperature linkage control of a heat pump / chiller unit, wherein the heat pump / chiller system includes an outdoor heat pump / chiller unit, an indoor temperature controller for terminal room temperature control, an indoor wired controller for controlling the heat pump / chiller unit, an indoor buffer tank for circulating water buffering at the outlet and inlet of the heat pump / chiller unit, an engineering water pump on the water circulation pipe at the outlet of the buffer tank, and multiple terminals. The multiple terminals are respectively located in multiple rooms, and each terminal corresponds to one or more of the rooms; that is, one or more terminals can be installed in a single room. The terminals are used to provide heating or cooling to the corresponding rooms. Each room corresponding to a terminal is connected in parallel to a fan coil unit for heating or cooling via the water circulation pipe at the outlet of the buffer tank. The heat pump / chiller unit includes radiators for heating or underfloor heating coils for heating. Each radiator has a two-way valve at its inlet pipe for controlling the flow of the heating pipe. Each underfloor heating coil has a mixing proportioning valve, a mixing pump, and a mixing temperature sensor on its inlet pipe. The heat pump / chiller unit includes a compressor, a first heat exchanger installed outdoors using water cooling, a second heat exchanger installed outdoors using air cooling, and a variable frequency pump. The variable frequency pump is connected to the first heat exchanger via a water pipe and pumps out the water after water cooling. The compressor is connected between the first and second heat exchangers via a refrigerant pipe and a four-way valve. An auxiliary electric heater for preheating the initial water output is installed in the outlet pipe connected to the first heat exchanger. The room temperature linkage control method for the heat pump / chiller unit includes the following steps: Step S1: Start the heat pump / chiller unit; Step S2, when the heat pump / chiller unit enters the heating control mode, Step S2.1: The ambient temperature sensor of the heat pump / chiller unit detects whether the ambient temperature is within the allowable operating range for heating, and at the same time detects whether the heat pump / chiller unit is in a fault-free or protection state. Step S2.2: If the heating is within the allowable operating range and the heat pump / chiller unit has no faults or protection, calculate the initial target heating water temperature and check whether the room temperature and water temperature meet the heating start-up conditions. Step S2.3: If the operation is outside the allowable range for heating, or if there is a fault or protection issue with the heat pump / chiller unit, then enter the heating standby state. Step S2.4: If the room temperature and water temperature detected in step S2.2 do not meet the heating start-up conditions, then enter the heating standby state in step S2.3. Step S2.5: In the heating standby state of step S2.3, the ambient temperature sensor of the heat pump / chiller unit checks again whether the ambient temperature is within the allowable operating range for heating, and at the same time checks whether the heat pump / chiller unit is in a fault-free or protection state. If not, proceed to step S2.2 to check again. Step S2.6: When the room temperature and water temperature meet the heating start-up conditions detected in step S2.2, the heat pump / chiller unit enters the initialization operation for heating start-up. After the initialization operation is completed, the compressor enters PID control. Step S2.7, run t 制热初始预运行时间 Then, the room temperature and water temperature are controlled together. Step S2.8: Real-time detection of room temperature, and every t... 制热水温修正时间 The temperature difference between the set room temperature and the current room temperature is detected and compared. The target heating water temperature is corrected based on the comparison results, and PID control is performed using the corrected target heating water temperature. Step S2.9, then determine whether the room temperature meets the shutdown conditions; If step S2.10 is not satisfied, return to step S2.8 to correct the target heating water temperature and perform PID control again; Step S2.11: If satisfied, return to the heating standby state in step S2.3; Step S3, when the heat pump / chiller unit enters the cooling control mode, Step S3.1: The ambient temperature sensor of the heat pump / chiller unit detects whether the ambient temperature is within the allowable operating range for cooling, and at the same time detects whether the heat pump / chiller unit is in a fault-free or protection state. Step S3.2: If the cooling operation is within the allowable range and the heat pump / chiller unit has no faults or protection, calculate the initial target cooling water temperature and check whether the room temperature and water temperature meet the cooling start-up conditions. Step S3.3: If the operation is outside the allowable range of refrigeration, or if the heat pump / chiller unit has a fault or protection, then enter the refrigeration standby state. Step S3.4: If the room temperature and water temperature detected in step S3.2 do not meet the cooling start conditions, then enter the cooling standby state in step S3.3. Step S3.5: In the standby cooling state of step S3.3, the ambient temperature sensor of the heat pump / chiller unit checks again whether the ambient temperature is within the allowable operating range for cooling, and at the same time checks whether the heat pump / chiller unit is in a fault-free or protection state. If not, proceed to step S3.2 to check again. In step S3.6, when the room temperature and water temperature meet the cooling start conditions in step S3.2, the heat pump / chiller unit enters the initialization operation for cooling start. After the initialization operation is completed, the compressor enters PID control. Step S3.7, run t 制冷初始预运行时间 Then, the room temperature and water temperature are controlled together. Step S3.8: Real-time monitoring of room temperature, and every t... 制冷水温修正时间 The system detects and compares the temperature difference between the set room temperature and the current room temperature, corrects the target cooling water temperature based on the comparison results, and then uses the corrected target cooling water temperature for PID control. Step S3.9, then determine whether the room temperature meets the shutdown conditions; If step S3.10 is not satisfied, return to step S3.8 to correct the target cooling water temperature and perform PID control again; Step S3.11: If the condition is met, return to the cooling standby state in step S3.3.

[0008] Furthermore, steps S2.2, S2.6, S2.7, S2.8, and S2.9 specifically include: Step S2.2.1, Set T 制热目标水温 To achieve the target heating water temperature, the heat pump / chiller unit initially operates at a temperature of T. 初始制热目标水温 The target heating water temperature is used as the heating target water temperature, and then it is corrected according to the conditions using Formula 1. The corrected target heating water temperature is then used for control. T 初始制热目标水温 =Min(T 气候依赖曲线制热目标水温 T 热泵制热最高水温 )---Formula 1 In Formula 1, the target water temperature for heating can be selected as the outlet water temperature or inlet water temperature of the heat pump / chiller unit, with the outlet water temperature as the default. T 气候依赖曲线制热目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a1 and b1 and water temperature values ​​A1 and B1 can be set. in: The setting range for a1 is -25~25℃, with a preferred value of -20℃. b1 is set within the range of -25 to 25℃, with a preferred value of 20℃, and b1 > a1; The A1 setting range is 20~80℃, with a preferred value of 25℃; The range of B1 is set to 20~80℃, with a preferred value of 55℃, and B1>A1; Step S2.2.2: The heat pump / chiller unit will not start and will continuously monitor the indoor room temperature and water temperature when any of the following conditions are met; specifically, the following conditions are included: T 房间温度 >T 制热设定房间温度 -∆T 制热房间温度启动温差 ; T 出水温度 >Min(T) 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); T 进水温度 >Min(T) 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); t 压缩机停机时间 <tcs min; Step S2.6.1: When the following conditions are met simultaneously, the two-way valve and the mixing proportioner valve will activate, the variable frequency water pump, the engineering water pump, and the mixing water pump will all start, and the variable frequency water pump of the heat pump / chiller unit will start running at the initialization position. 水泵初始化时间 Afterwards, if the water flow switch is closed for 10 consecutive seconds, the electronic expansion valve is adjusted to the initial step number, the fan of the second heat exchanger starts running at the initial speed, and the compressor starts running at the initial frequency 30 seconds after the fan starts running. The heat pump / chiller unit enters the initialization control. Specifically, the following conditions are included: T 房间温度 ≤T 制热设定房间温度 -∆T 制热房间温度启动温差 ; T 出水温度 ≤Min(T 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); T 进水温度 ≤Min(T 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); t 压缩机停机时间 ≥tcs min; Step S2.7.1: After the compressor initialization operation is completed, according to the detected T... 房间温度 and T 水温 The initial target heating water temperature T 初始制热目标水温 PID control is used to adjust the compressor's operating frequency, and the operation time is t. 制热初始预运行时间 After min, adjust according to the following conditions; Step S2.8.1, when T 房间温度 <T制热设定房间温度 At time, every t 制热水温修正时间 The system detects the indoor room temperature and calculates the room temperature deviation ∆T. 制热房间温差 (∆T 制热房间温差 =T 制热设定房间温度 -T 当前房间温度 ), and for two consecutive detections of ∆T 制热房间温差 The comparison is performed, and the target heating water temperature is corrected based on the comparison results. The corrected target heating water temperature is then compared with the highest heating water temperature of the heat pump according to Formula 2. T 制热目标水温 =Min(T 制热目标水温修正 T 热泵制热最高水温 )---Formula 2 T 制热目标水温 Based on the target outlet or inlet water temperature of the heat pump / chiller unit in step S2.2.1, perform PID calculations to control the compressor operating frequency: 1) When ∆T 制热房间温差(n) ≥∆T 制热房间温差(n-1) At that time, the current target water temperature is corrected, and the corrected target water temperature is: T 制热目标水温修正 =T 当前制热目标水温 +T 制热水温修正值1 2) When ∆T 制热房间温差(n) <∆T 制热房间温差(n-1) At this time, the current target heating water temperature does not need to be corrected, and the current target heating water temperature is maintained for control. 3) Continuously adjust ∆T 制热房间温差 Periodic testing is conducted, and if the above conditions are met, the target heating water temperature is continuously corrected. The corrected target heating water temperature is not higher than the maximum allowable heating water temperature limit of the heat pump / chiller unit. Step S2.8.2, when T 制热设定房间温度 ≤T 房间温度 <T 制热设定房间温度 +∆T 制热房间温度停机温差 At time, every t 制热水温修正时间 min, detect the indoor room temperature and calculate the room temperature deviation ∆T 制热房间温差 ∆T 制热房间温差 =T 制热设定房间温度 -T 当前房间温度 And for the ∆T of two consecutive detections 制热房间温差 The comparison is performed, and the target heating water temperature is corrected based on the comparison results. The corrected target heating water temperature is then used according to T in Formula 2. 制热目标水温 Based on the target outlet or inlet water temperature, PID calculations are used to control the compressor's operating frequency. 1) When ∆T 制热房间温差(n) <∆T 制热房间温差(n-1)At that time, the current target heating water temperature is corrected, and the corrected target heating water temperature is: T 制热目标水温修正 =T 当前制热目标水温 -T 制热水温修正值2 2) When ∆T 制热房间温差(n) ≥∆T 制热房间温差(n-1) At this time, the current target heating water temperature does not need to be corrected, and the current target heating water temperature is maintained for control.

[0009] 3) Continuously adjust ∆T 制热房间温差 Periodic testing is conducted, and if the above conditions are met, the target heating water temperature is continuously corrected. The corrected target heating water temperature is not lower than the lower limit of the heat pump water temperature allowed by the heat pump / chiller unit. Step S2.9.1: During the above control process, if T is detected for 5 consecutive seconds at any time... 制热目标水温 If the target outlet or inlet water temperature is met by the PID control to reach the set temperature and then the compressor stops according to the temperature-point shutdown sequence, the compressor will continue to operate if the auxiliary electric heater or external heat source is running until the set heating room temperature is reached. Then, if the start-up conditions for heating room temperature control in step S2.6.1 are met... and And satisfy T 房间温度 <T 制热设定房间温度 +∆T 制热房温停机温差 If the compressor can start and run normally, it will operate at the target heating water temperature before shutdown, according to step S2.2.1, T. 制热目标水温 The target outlet or inlet water temperature is used to control the compressor operating frequency using PID control; Step S2.9.2, when T is satisfied 房间温度 ≥T 制热设定房间温度 +∆T 制热房间温度停机温差 When the temperature reaches the set point, the machine stops according to the shutdown sequence and enters standby mode. After entering standby mode, if the start-up conditions for the heating room temperature control in step S2.6.1 are met, the machine starts and runs normally according to the conditions. This process is repeated to achieve precise control of the target room temperature. in: T 气候依赖曲线制热目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a1 and b1 and water temperature values ​​A1 and B1 can be set. T 制热设定房间温度 Set the room temperature for heating; the setting range is 16~30℃, and the default setting is 18℃. ∆T 制热房间温度启动温差 The starting temperature difference for controlling the temperature of the heated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. ∆T制热房间温度停机温差 The shutdown temperature difference for controlling the temperature of the heated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. T 制热目标水温 To achieve the target heating water temperature, the heat pump / chiller unit initially operates at the aforementioned T... 初始制热目标水温 The target temperature is set as the objective, and then adjusted according to the conditions. The adjusted target heating water temperature is then used for control. ΔT 制热水温启动温差 The starting temperature difference for hot water temperature control is set within a range of 2~10℃, with a preferred value of 5℃. T 热泵制热最高水温 The maximum water temperature that a heat pump can achieve is determined based on the operating range of the compressor used in the heat pump / chiller unit. The maximum water temperature for heat pump heating varies depending on the outdoor ambient temperature. t 压缩机停机时间 This is tcs min, where tcs depends on the compressor and the default value is 3 min. t 制热初始预运行时间 min is the time after the heat pump / chiller unit starts up (T). 初始制热目标水温 The running time can be set within the range of 6 to 120 minutes, with 15 minutes being the preferred value. t 制热水温修正时间 min is the time interval for detecting changes in room temperature and adjusting water temperature control. The setting range is 2 to 60 minutes, with a preferred value of 5 minutes. ∆T 制热房间温差 For T 制热设定房间温度 and T 当前房间温度 The temperature difference value; ∆T 制热房间温差(n) This is the temperature difference value of the heating room currently being measured and calculated; ∆T 制热房间温差(n-1) This is the temperature difference value of the heated room calculated from the last test; T 制热水温修正值1 The set range is 0.5~10℃, with a preferred value of 2℃; T 制热水温修正值2 The set range is 0.5~10℃, with a preferred value of 1℃.

[0010] Furthermore, step S2.6.1 also includes: if the water flow switch is detected to be disconnected for 10 consecutive seconds, a water flow abnormality protection is reported, the started load stops, and the protection automatically recovers after 3 minutes. If the water flow abnormality protection occurs 3 times in 1 hour, the heat pump / chiller unit is locked and not allowed to start. The heat pump / chiller unit reports a water flow abnormality protection, and power outage maintenance or manual fault clearing is required to restore the start judgment, so as to ensure the reliable and safe operation of the heat pump / chiller unit.

[0011] Furthermore, steps S3.2, S3.6, S3.7, S3.8, and S3.9 specifically include: Step S3.2.1, Set T 制冷目标水温 To achieve the target cooling water temperature, the heat pump / chiller unit initially operates at a temperature of T. 初始制冷目标水温 The target cooling water temperature is used as the cooling target water temperature, and then it is corrected according to the conditions using Formula 3. The corrected target cooling water temperature is then used for control. T 初始制冷目标水温 = T 气候依赖曲线制冷目标水温 ---Formula 3 The target cooling water temperature in Formula 3 can be selected as the outlet water temperature or inlet water temperature of the heat pump / chiller unit, with the outlet water temperature as the default. T 气候依赖曲线制冷目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a2 and b2, and water temperature values ​​A2 and B2 can be set. in: The a2 setting range is 5~35℃, with a preferred value of 15℃; b2 is set within the range of 5~35℃, with a preferred value of 30℃, and b2 > a2; The A2 setting range is 5~25℃, with a preferred value of 7℃; The setting range for B2 is 5~25℃, with a preferred value of 18℃, and B2 > A2; Step S3.2.2: The heat pump / chiller unit will not start and will continuously monitor room temperature and water temperature when any of the following conditions are met; specifically, the following conditions are included: T 房间温度 <T 制冷设定房间温度 +∆T 制冷房间温度启动温差 ; T 出水温度 <T 制冷目标水温 +∆T 制冷水温启动温差 ; T 进水温度 <T 制冷目标水温 +∆T 制冷水温启动温差 ; t 压缩机停机时间 <tcs min; Step S3.6.1: When the following conditions are met simultaneously, the two-way valve and mixing proportioner valve will activate, the variable frequency water pump, the engineering water pump, and the mixing water pump will all start, and the variable frequency water pump of the heat pump / chiller unit will start running at the initialization position. 水泵初始化时间Afterwards, if the water flow switch is closed for 10 consecutive seconds, the electronic expansion valve is adjusted to the initial step number, the fan of the second heat exchanger starts running at the initial speed, the compressor starts running at the initial frequency 30 seconds after the fan starts running, the four-way valve is energized and reversed 20 seconds after the compressor starts running, and the heat pump / chiller unit enters the initialization control. Specifically, the following conditions are included: T 房间温度 ≥T 制冷设定房间温度 +∆T 制冷房间温度启动温差 ; T 出水温度 ≥T 制冷目标水温 +∆T 制冷水温启动温差 ; T 进水温度 ≥T 制冷目标水温 +∆T 制冷水温启动温差 ; t 压缩机停机时间 ≥tcs min; Step S3.7.1: After the compressor initialization operation is completed, based on the detected T... 房间温度 and T 水温 With the initial target cooling water temperature T 初始制冷目标水温 PID control is used to adjust the compressor's operating frequency, and the operation time is t. 制冷初始预运行时间 After min, adjust according to the following conditions: Step S3.8.1, when T 房间温度 >T 制冷设定房间温度 At time, every t 制冷水温修正时间 The system detects the indoor room temperature and calculates the temperature deviation ∆T of the cooled room. 制冷房间温差 (∆T 制冷房间温差 =T 当前房间温度 -T 制冷设定房间温度 ), and for two consecutive detections of ∆T 制冷房间温差 The comparison is performed, and the target cooling water temperature is corrected based on the comparison results. The corrected target cooling water temperature is then used to perform PID calculations to control the compressor operating frequency according to the target outlet or inlet water temperature of the heat pump / chiller unit in step S3.2.1. 1) When ∆T 制冷房间温差(n) ≥∆T 制冷房间温差(n-1) At that time, the current target cooling water temperature is corrected, and the corrected target cooling water temperature is: T 制冷目标水温修正 =T 当前制冷目标水温 -T 制冷水温修正值1 2) When ∆T 制冷房间温差(n) <∆T 制冷房间温差(n-1)At this time, the current target cooling water temperature does not need to be corrected, and the current target cooling water temperature is maintained for control. 3) Continuously adjust ∆T 制冷房间温差 Periodic testing is conducted, and if the above conditions are met, the target cooling water temperature is continuously corrected. The corrected target cooling water temperature is not lower than the lower limit of the cooling water temperature set by the heat pump / chiller unit. Step S3.8.2, when T 制冷设定房间温度 -∆T 制冷房间温度停机温差 <T 房间温度 ≤T 制冷设定房间温度 At time, every t 制冷水温修正时间 The system detects the indoor room temperature and calculates the room temperature deviation ∆T. 制冷房间温差 ∆T 制冷房间温差 =T 当前房间温度 -T 制冷设定房间温度 And for the ∆T of two consecutive detections 制冷房间温差 The comparison is performed, and the target cooling water temperature is corrected based on the comparison results. Then, using the corrected target cooling water temperature, and according to the corrected target outlet or inlet water temperature in step S3.8.1, the compressor operating frequency is controlled using PID calculation. 1) When ∆T 制冷房间温差(n) <∆T 制冷房间温差(n-1) At that time, the current target cooling water temperature is corrected, and the corrected target cooling water temperature is: T 制冷目标水温修正 =T 当前制冷目标水温 +T 制冷水温修正值2 2) When ∆T 制冷房间温差(n) ≥∆T 制冷房间温差(n-1) At this time, the current target cooling water temperature does not need to be corrected, and the current target cooling water temperature is maintained for control. 3) Continuously adjust ∆T 制冷房间温差 Periodic testing is performed, and if the above conditions are met, the target cooling water temperature is continuously corrected. The corrected target cooling water temperature is not higher than the upper limit of the cooling water temperature set by the heat pump / chiller unit. Step S3.9.1: During the above control process, if the temperature-reaching shutdown condition of the aforementioned outlet water temperature or inlet water temperature PID control is detected for 5 consecutive seconds at any time, the machine will stop according to the temperature-reaching shutdown sequence. Then, if the start-up condition of the cooling room temperature control in step S3.6.1 is met... and And satisfy T 房间温度 >T 制冷设定房间温度 -∆T 制冷房间温度停机温差 If the compressor can start and run normally, it will operate at the target cooling water temperature before shutdown, according to step S3.2.1, T. 制冷目标水温 The target outlet or inlet water temperature is used to control the compressor operating frequency using PID control; Step S3.9.2, when T is satisfied 房间温度 ≤T 制冷设定房间温度 -∆T 制冷房间温度停机温差 When the temperature reaches the set point, the machine stops according to the shutdown sequence and enters standby mode. After entering standby mode, if the start-up conditions for the cooling room temperature control in step S3.6.1 are met, the machine starts and runs normally according to the conditions. This process is repeated to achieve precise control of the target room temperature. in: T 气候依赖曲线制冷目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a2 and b2, and water temperature values ​​A2 and B2 can be set. T 制冷设定房间温度 Set the room temperature for cooling; the setting range is 16~30℃, and the default setting is 26℃. ∆T 制冷房间温度启动温差 The starting temperature difference for controlling the temperature of the refrigerated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. ∆T 制冷房间温度停机温差 The shutdown temperature difference for controlling the room temperature is set within a range of 0.2~2℃, with a preferred value of 0.5℃. T 制冷目标水温 To achieve the target cooling water temperature, the heat pump / chiller unit initially operates at the aforementioned T... 初始制冷目标水温 The target temperature is set as the objective, and then adjusted according to the conditions. The adjusted target cooling water temperature is then used for control. ΔT 制冷水温启动温差 The starting temperature difference for cooling water temperature control is set within a range of 2~10℃, with a preferred value of 5℃. t 压缩机停机时间 This is tcs min, where tcs depends on the compressor and the default value is 3 min. t 制冷初始预运行时间 min is the time after the heat pump / chiller unit starts up (T). 初始制冷目标水温 The running time can be set within the range of 6 to 120 minutes, with 15 minutes being the preferred value. t 制冷水温修正时间 min is the time interval for detecting changes in room temperature and adjusting water temperature control. The setting range is 2 to 60 minutes, with a preferred value of 5 minutes. ∆T 制冷房间温差 For T 当前房间温度 and T 制冷设定房间温度 The temperature difference value; ∆T 制冷房间温差(n) This is the temperature difference value of the refrigerated room currently being measured and calculated; ∆T 制冷房间温差(n-1) This is the temperature difference value of the refrigerated room calculated from the last test; T 制冷水温修正值1 The set range is 0.5~10℃, with a preferred value of 2℃; T 制冷水温修正值2 The set range is 0.5~10℃, with a preferred value of 1℃.

[0012] Furthermore, step S3.6.1 also includes: if the water flow switch is detected to be disconnected for 10 consecutive seconds, a water flow abnormality protection is reported, the started load stops, and the protection automatically recovers after 3 minutes. If the water flow abnormality protection occurs 3 times in 1 hour, the heat pump / chiller unit is locked and not allowed to start. The heat pump / chiller unit reports a water flow abnormality protection, and power outage maintenance or manual fault clearing is required to restore the start judgment, so as to ensure the reliable and safe operation of the heat pump / chiller unit.

[0013] A control device for a heat pump / chilled water system, comprising: Memory; and A processor coupled to the memory is configured to execute, based on instructions stored in the memory, a room temperature linkage control method for a heat pump / chiller unit as described above.

[0014] An air source heat pump, comprising: A heat pump / chilled water system; and a control device for a heat pump / chilled water system according to the above description.

[0015] A computer-readable storage medium includes computer program instructions, wherein when executed by a processor, the computer program instructions implement a room temperature linkage control method for a heat pump / chiller unit as described above.

[0016] The beneficial effects of this invention are: To address the issue that existing heat pump / chiller units require repeated adjustments to the target water supply temperature to achieve the desired room temperature for users, and that these repeated adjustments cause fluctuations in the compressor's operating frequency, affecting its reliability and potentially leading to frequent start-stop cycles, which impacts thermal comfort and results in a poor user experience.

[0017] In this invention, room temperature linkage control is achieved while taking into account comfort and energy saving. It realizes intelligent adaptive adjustment of the water supply temperature of heat pump / chiller unit, reduces room temperature fluctuations, avoids users repeatedly adjusting the target water supply temperature, achieves precise temperature control of the target room, and provides higher human thermal comfort.

[0018] At the same time, improving the usability and reliability of heat pump products and enhancing their ability to resist disturbances and uncertainties will enable the control system to better adapt to on-site requirements, improve water supply quality, and increase system efficiency.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the room temperature control system of the heat pump / chiller unit in this invention; Figure 2 This is a schematic diagram illustrating the working principle of the heat pump / chiller unit in this invention; Figure 3 This is a flowchart of the linkage control method of the heat pump / chiller unit in heating mode in this invention; Figure 4 This is a flowchart of the linkage control method of the heat pump / chiller unit in cooling mode in this invention; Figure 5 This is a schematic diagram of the climate dependence curve under the heating mode in this invention; Figure 6 This is a schematic diagram of the climate dependence curve under the cooling mode in this invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Terms such as "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Furthermore, in the description of this invention, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be reasonably determined in conjunction with the specific content of the technical solution.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0025] Figure 1 This is a schematic diagram of a room temperature control system according to some embodiments disclosed in this invention. Figure 2 This is a schematic diagram illustrating the working principle of a heat pump / chiller unit according to some embodiments disclosed in this invention.

[0026] like Figure 1 As shown, the heat pump / chiller unit 1 and its corresponding heat pump / chiller system include the heat pump / chiller unit 1 installed outdoors, a temperature controller 2 installed indoors for controlling the temperature of the terminal rooms, a wired controller 3 installed indoors for controlling the heat pump / chiller unit 1, a buffer tank 4 installed indoors for buffering the circulating water at the outlet and inlet of the heat pump / chiller unit 1, an engineering water pump 5 installed on the water circulation pipe at the outlet of the buffer tank 4, and multiple terminals 6. The multiple terminals 6 are respectively installed in one or more rooms. In this embodiment, the multiple terminals 6 are separated from one room. Each room can be equipped with a corresponding terminal 6, which is used to provide heating and cooling to the corresponding room. The water circulation pipe of the outlet of the buffer water tank 4 is connected in parallel to each room of the terminal 6 to a fan coil unit 7 for heating or cooling, a radiator 8 for heating, and a floor heating coil 9 for heating. Each radiator 8 is also equipped with a two-way valve 10 to control the opening and closing of the pipeline at its corresponding inlet pipe. Each floor heating coil 9 is also equipped with a mixing proportion valve 11, a mixing water pump 12, and a mixing temperature sensor 13 on its inlet pipe.

[0027] like Figure 2 As shown, the heat pump / chill unit includes a compressor 14, a first heat exchanger 15 installed outdoors using water cooling by a water pump unit, a second heat exchanger 16 installed outdoors using air cooling by a fan, and a variable frequency water pump 17. The variable frequency water pump 17 is connected to the first heat exchanger 15 through a water pipe and pumps out the water source after water cooling. The compressor 14 is connected between the first heat exchanger 15 and the second heat exchanger 16 through a refrigerant pipe and a four-way valve 18. An auxiliary electric heater 19 is also installed in the water outlet pipe connected to the first heat exchanger 15 to preheat the initial water outlet.

[0028] This invention discloses a room temperature linkage control method for heat pump / chiller units provided in some embodiments, the specific implementation of which includes the following steps: Step S1: Start the heat pump / chiller unit; Step S2, as follows Figure 3 As shown, when the heat pump / chiller unit enters the heating control mode, Step S2.1: The ambient temperature sensor of the heat pump / chiller unit detects whether the ambient temperature is within the allowable operating range for heating, and at the same time detects whether the heat pump / chiller unit is in a fault-free or protection state. Step S2.2: If the heating is within the allowable operating range and the heat pump / chiller unit has no faults or protection, calculate the initial target heating water temperature and check whether the room temperature and water temperature meet the heating start-up conditions. Step S2.3: If the operation is outside the allowable range for heating, or if there is a fault or protection issue with the heat pump / chiller unit, then enter the heating standby state. Step S2.4: If the room temperature and water temperature detected in step S2.2 do not meet the heating start-up conditions, then enter the heating standby state in step S2.3. Step S2.5: In the heating standby state of step S2.3, the ambient temperature sensor of the heat pump / chiller unit checks again whether the ambient temperature is within the allowable operating range for heating, and at the same time checks whether the heat pump / chiller unit is in a fault-free or protection state. If not, proceed to step S2.2 to check again. Step S2.6: When the room temperature and water temperature meet the heating start-up conditions detected in step S2.2, the heat pump / chiller unit enters the initialization operation for heating start-up. After the initialization operation is completed, the compressor enters PID control. Step S2.7, run t 制热初始预运行时间 Then, the room temperature and water temperature are controlled together. Step S2.8: Real-time detection of room temperature, and every t... 制热水温修正时间 The temperature difference between the set room temperature and the current room temperature is detected and compared. The target heating water temperature is corrected based on the comparison results, and PID control is performed using the corrected target heating water temperature. Step S2.9, then determine whether the room temperature meets the shutdown conditions; If step S2.10 is not satisfied, return to step S2.8 to correct the target heating water temperature and perform PID control again; Step S2.11: If satisfied, return to the heating standby state in step S2.3; Furthermore, steps S2.2, S2.6, S2.7, S2.8, and S2.9 specifically include: Step S2.2.1, Set T 制热目标水温 To achieve the target heating water temperature, the heat pump / chiller unit initially operates at a temperature of T. 初始制热目标水温 The target heating water temperature is used as the heating target water temperature, and then it is corrected according to the conditions using Formula 1. The corrected target heating water temperature is then used for control. T 初始制热目标水温 =Min(T 气候依赖曲线制热目标水温 T 热泵制热最高水温 )---Formula 1 In Formula 1, the target water temperature for heating can be selected as the outlet water temperature or inlet water temperature of the heat pump / chiller unit, with the outlet water temperature as the default. like Figure 5 As shown, T 气候依赖曲线制热目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a1 and b1 and water temperature values ​​A1 and B1 can be set. in: The setting range for a1 is -25~25℃, with a preferred value of -20℃. b1 is set within the range of -25 to 25℃, with a preferred value of 20℃, and b1 > a1; The A1 setting range is 20~80℃, with a preferred value of 25℃; The range of B1 is set to 20~80℃, with a preferred value of 55℃, and B1>A1; Step S2.2.2: The heat pump / chiller unit will not start and will continuously monitor the indoor room temperature and water temperature when any of the following conditions are met; specifically, the following conditions are included: T 房间温度 >T 制热设定房间温度 -∆T 制热房间温度启动温差 ; T 出水温度 >Min(T) 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); T 进水温度 >Min(T) 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); t 压缩机停机时间 <tcs min; Step S2.6.1: When the following conditions are met simultaneously, the two-way valve and the mixing proportioner valve will activate, the variable frequency water pump, the engineering water pump, and the mixing water pump will all start, and the variable frequency water pump of the heat pump / chiller unit will start running at the initialization position. 水泵初始化时间 Subsequently, in this embodiment, t 水泵初始化时间The default time is 1 minute. If the flow switch is closed for 10 consecutive seconds, the electronic expansion valve will adjust to the initial step number, and the fan of the second heat exchanger will start running at the initial speed. After the fan starts running for 30 seconds, the compressor will start running at the initial frequency, and the heat pump / chiller unit will enter the initialization control. If the flow switch is detected to be open for 10 consecutive seconds, a flow abnormality protection will be reported, and the started load will stop. The protection will automatically recover after 3 minutes. If the flow abnormality protection occurs 3 times in 1 hour, the heat pump / chiller unit will be locked and not allowed to start. The heat pump / chiller unit will report a flow abnormality protection, and power outage maintenance or manual fault clearing is required to restore the start judgment, so as to ensure the reliable and safe operation of the heat pump / chiller unit.

[0029] Specifically, the following conditions are included: T 房间温度 ≤T 制热设定房间温度 -∆T 制热房间温度启动温差 ; T 出水温度 ≤Min(T 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); T 进水温度 ≤Min(T 制热目标水温 -ΔT 制热水温启动温差 T 热泵制热最高水温 -5); t 压缩机停机时间 ≥tcs min; Step S2.7.1: After the compressor initialization operation is completed, according to the detected T... 房间温度 and T 水温 The initial target heating water temperature T 初始制热目标水温 PID control is used to adjust the compressor's operating frequency, and the operation time is t. 制热初始预运行时间 After min, adjust according to the following conditions; Step S2.8.1, when T 房间温度 <T 制热设定房间温度 At time, every t 制热水温修正时间 The system detects the indoor room temperature and calculates the room temperature deviation ∆T. 制热房间温差 (∆T 制热房间温差 =T 制热设定房间温度 -T 当前房间温度 ), and for two consecutive detections of ∆T 制热房间温差 The comparison is performed, and the target heating water temperature is corrected based on the comparison results. The corrected target heating water temperature is then compared with the highest heating water temperature of the heat pump according to Formula 2. T 制热目标水温 =Min(T 制热目标水温修正 T热泵制热最高水温 )---Formula 2 T 制热目标水温 Based on the target outlet or inlet water temperature of the heat pump / chiller unit in step S2.2.1, perform PID calculations to control the compressor operating frequency: 1) When ∆T 制热房间温差(n) ≥∆T 制热房间温差(n-1) At that time, the current target water temperature is corrected, and the corrected target water temperature is: T 制热目标水温修正 =T 当前制热目标水温 +T 制热水温修正值1 2) When ∆T 制热房间温差(n) <∆T 制热房间温差(n-1) At this time, the current target heating water temperature does not need to be corrected, and the current target heating water temperature is maintained for control. 3) Continuously adjust ∆T 制热房间温差 Periodic testing is conducted, and if the above conditions are met, the target heating water temperature is continuously corrected. The corrected target heating water temperature is not higher than the maximum allowable heating water temperature limit of the heat pump / chiller unit. Step S2.8.2, when T 制热设定房间温度 ≤T 房间温度 <T 制热设定房间温度 +∆T 制热房间温度停机温差 At time, every t 制热水温修正时间 min, detect the indoor room temperature and calculate the room temperature deviation ∆T 制热房间温差 ∆T 制热房间温差 =T 制热设定房间温度 -T 当前房间温度 And for the ∆T of two consecutive detections 制热房间温差 The comparison is performed, and the target heating water temperature is corrected based on the comparison results. The corrected target heating water temperature is then used according to T in Formula 2. 制热目标水温 Based on the target outlet or inlet water temperature, PID calculations are used to control the compressor's operating frequency. 1) When ∆T 制热房间温差(n) <∆T 制热房间温差(n-1) At that time, the current target heating water temperature is corrected, and the corrected target heating water temperature is: T 制热目标水温修正 =T 当前制热目标水温 -T 制热水温修正值2 2) When ∆T 制热房间温差(n) ≥∆T 制热房间温差(n-1) At this time, the current target heating water temperature does not need to be corrected, and the current target heating water temperature is maintained for control.

[0030] 3) Continuously adjust ∆T 制热房间温差Periodic testing is conducted, and if the above conditions are met, the target heating water temperature is continuously corrected. The corrected target heating water temperature is not lower than the lower limit of the heat pump water temperature allowed by the heat pump / chiller unit. Step S2.9.1: During the above control process, if T is detected for 5 consecutive seconds at any time... 制热目标水温 If the target outlet or inlet water temperature is reached and the PID control reaches the temperature shutdown condition, the compressor will shut down according to the temperature point shutdown sequence. If the auxiliary electric heater or external heat source (such as a gas furnace) is running, it will continue to run until the set heating room temperature is reached before stopping. Then, if the start-up conditions for heating room temperature control in step S2.6.1 are met, the compressor will shut down. and And satisfy T 房间温度 <T 制热设定房间温度 +∆T 制热房温停机温差 If the compressor can start and run normally, it will operate at the target heating water temperature before shutdown, according to step S2.2.1, T. 制热目标水温 The target outlet or inlet water temperature is used to control the compressor operating frequency using PID control; Step S2.9.2, when T is satisfied 房间温度 ≥T 制热设定房间温度 +∆T 制热房间温度停机温差 When the temperature reaches the set point, the machine stops according to the shutdown sequence and enters standby mode. After entering standby mode, if the start-up conditions for the heating room temperature control in step S2.6.1 are met, the machine starts and runs normally according to the conditions. This process is repeated to achieve precise control of the target room temperature. in: T 气候依赖曲线制热目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a1 and b1 and water temperature values ​​A1 and B1 can be set. T 制热设定房间温度 Set the room temperature for heating; the setting range is 16~30℃, and the default setting is 18℃. ∆T 制热房间温度启动温差 The starting temperature difference for controlling the temperature of the heated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. ∆T 制热房间温度停机温差 The shutdown temperature difference for controlling the temperature of the heated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. T 制热目标水温 To achieve the target heating water temperature, the heat pump / chiller unit initially operates at the aforementioned T... 初始制热目标水温 The target temperature is set as the objective, and then adjusted according to the conditions. The adjusted target heating water temperature is then used for control. ΔT 制热水温启动温差 The starting temperature difference for hot water temperature control is set within a range of 2~10℃, with a preferred value of 5℃. T 热泵制热最高水温 The maximum water temperature that a heat pump can achieve is determined based on the operating range of the compressor used in the heat pump / chiller unit. The maximum water temperature for heat pump heating varies depending on the outdoor ambient temperature. t 压缩机停机时间 This is tcs min, where tcs depends on the compressor and the default value is 3 min. t 制热初始预运行时间 min is the time after the heat pump / chiller unit starts up (T). 初始制热目标水温 The running time can be set within the range of 6 to 120 minutes, with 15 minutes being the preferred value. t 制热水温修正时间 min is the time interval for detecting changes in room temperature and adjusting water temperature control. The setting range is 2 to 60 minutes, with a preferred value of 5 minutes. ∆T 制热房间温差 For T 制热设定房间温度 and T 当前房间温度 The temperature difference value; ∆T 制热房间温差(n) This is the temperature difference value of the heating room currently being measured and calculated; ∆T 制热房间温差(n-1) This is the temperature difference value of the heated room calculated from the last test; T 制热水温修正值1 The set range is 0.5~10℃, with a preferred value of 2℃; T 制热水温修正值2 The set range is 0.5~10℃, with a preferred value of 1℃.

[0031] Step S3, when the heat pump / chiller unit enters the cooling control mode, Step S3.1: The ambient temperature sensor of the heat pump / chiller unit detects whether the ambient temperature is within the allowable operating range for cooling, and at the same time detects whether the heat pump / chiller unit is in a fault-free or protection state. Step S3.2: If the cooling operation is within the allowable range and the heat pump / chiller unit has no faults or protection, calculate the initial target cooling water temperature and check whether the room temperature and water temperature meet the cooling start-up conditions. Step S3.3: If the operation is outside the allowable range of refrigeration, or if the heat pump / chiller unit has a fault or protection, then enter the refrigeration standby state. Step S3.4: If the room temperature and water temperature detected in step S3.2 do not meet the cooling start conditions, then enter the cooling standby state in step S3.3. Step S3.5: In the standby cooling state of step S3.3, the ambient temperature sensor of the heat pump / chiller unit checks again whether the ambient temperature is within the allowable operating range for cooling, and at the same time checks whether the heat pump / chiller unit is in a fault-free or protection state. If not, proceed to step S3.2 to check again. In step S3.6, when the room temperature and water temperature meet the cooling start conditions in step S3.2, the heat pump / chiller unit enters the initialization operation for cooling start. After the initialization operation is completed, the compressor enters PID control. Step S3.7, run t 制冷初始预运行时间 Then, the room temperature and water temperature are controlled together. Step S3.8: Real-time monitoring of room temperature, and every t... 制冷水温修正时间 The system detects and compares the temperature difference between the set room temperature and the current room temperature, corrects the target cooling water temperature based on the comparison results, and then uses the corrected target cooling water temperature for PID control. Step S3.9, then determine whether the room temperature meets the shutdown conditions; If step S3.10 is not satisfied, return to step S3.8 to correct the target cooling water temperature and perform PID control again; Step S3.11: If the condition is met, return to the cooling standby state in step S3.3.

[0032] Steps S3.2, S3.6, S3.7, S3.8, and S3.9 further include: Step S3.2.1, Set T 制冷目标水温 To achieve the target cooling water temperature, the heat pump / chiller unit initially operates at a temperature of T. 初始制冷目标水温 The target cooling water temperature is used as the cooling target water temperature, and then it is corrected according to the conditions using Formula 3. The corrected target cooling water temperature is then used for control. T 初始制冷目标水温 = T 气候依赖曲线制冷目标水温 ---Formula 3 The target cooling water temperature in Formula 3 can be selected as the outlet water temperature or inlet water temperature of the heat pump / chiller unit, with the outlet water temperature as the default. like Figure 6 As shown, T 气候依赖曲线制冷目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a2 and b2, and water temperature values ​​A2 and B2 can be set. in: The a2 setting range is 5~35℃, with a preferred value of 15℃; b2 is set within the range of 5~35℃, with a preferred value of 30℃, and b2 > a2; The A2 setting range is 5~25℃, with a preferred value of 7℃; The setting range for B2 is 5~25℃, with a preferred value of 18℃, and B2 > A2; Step S3.2.2: The heat pump / chiller unit will not start and will continuously monitor room temperature and water temperature when any of the following conditions are met; specifically, the following conditions are included: T 房间温度 <T 制冷设定房间温度 +∆T 制冷房间温度启动温差 ; T 出水温度 <T 制冷目标水温 +∆T 制冷水温启动温差 ; T 进水温度 <T 制冷目标水温 +∆T 制冷水温启动温差 ; t 压缩机停机时间 <tcs min; Step S3.6.1: When the following conditions are met simultaneously, the two-way valve and mixing proportioner valve will activate, the variable frequency water pump, the engineering water pump, and the mixing water pump will all start, and the variable frequency water pump of the heat pump / chiller unit will start running at the initialization position. 水泵初始化时间 Subsequently, in this embodiment, t 水泵初始化时间 The default time is 1 minute. If the flow switch is closed for 10 consecutive seconds, the electronic expansion valve will adjust to the initial step number, the fan of the second heat exchanger will start running at the initial speed, the compressor will start running at the initial frequency 30 seconds after the fan starts running, and the four-way valve will be energized and reversed 20 seconds after the compressor starts running, and the heat pump / chiller unit will enter the initialization control. If the flow switch is detected to be open for 10 consecutive seconds, a water flow abnormality protection will be reported, the started load will stop, and the protection will automatically recover after 3 minutes. If the water flow abnormality protection occurs 3 times in 1 hour, the heat pump / chiller unit will be locked and not allowed to start. The heat pump / chiller unit will report a water flow abnormality protection, and power outage maintenance or manual fault clearing is required to restore the start judgment, so as to ensure the reliable and safe operation of the heat pump / chiller unit.

[0033] Specifically, the following conditions are included: T 房间温度 ≥T 制冷设定房间温度 +∆T 制冷房间温度启动温差 ; T 出水温度 ≥T 制冷目标水温 +∆T 制冷水温启动温差 ; T 进水温度 ≥T 制冷目标水温 +∆T 制冷水温启动温差 ; t 压缩机停机时间 ≥tcs min; Step S3.7.1: After the compressor initialization operation is completed, based on the detected T... 房间温度 and T 水温 With the initial target cooling water temperature (T) 初始制冷目标水温 ) Perform PID control to adjust the compressor's operating frequency, running t 制冷初始预运行时间 After min, adjust according to the following conditions: Step S3.8.1, when T 房间温度 >T 制冷设定房间温度 At time, every t 制冷水温修正时间 The system detects the indoor room temperature and calculates the temperature deviation ∆T of the cooled room. 制冷房间温差 (∆T 制冷房间温差 =T 当前房间温度 -T 制冷设定房间温度 ), and for two consecutive detections of ∆T 制冷房间温差 The comparison is performed, and the target cooling water temperature is corrected based on the comparison results. The corrected target cooling water temperature is then used to perform PID calculations to control the compressor operating frequency according to the target outlet or inlet water temperature of the heat pump / chiller unit in step S3.2.1. 1) When ∆T 制冷房间温差(n) ≥∆T 制冷房间温差(n-1) At that time, the current target cooling water temperature is corrected, and the corrected target cooling water temperature is: T 制冷目标水温修正 =T 当前制冷目标水温 -T 制冷水温修正值1 2) When ∆T 制冷房间温差(n) <∆T 制冷房间温差(n-1) At this time, the current target cooling water temperature does not need to be corrected, and the current target cooling water temperature is maintained for control. 3) Continuously adjust ∆T 制冷房间温差 Periodic testing is conducted, and if the above conditions are met, the target cooling water temperature is continuously corrected. The corrected target cooling water temperature is not lower than the lower limit of the cooling water temperature set by the heat pump / chiller unit. Step S3.8.2, when T 制冷设定房间温度 -∆T 制冷房间温度停机温差 <T 房间温度 ≤T 制冷设定房间温度 At time, every t 制冷水温修正时间 The system detects the indoor room temperature and calculates the room temperature deviation ∆T. 制冷房间温差 ∆T 制冷房间温差 =T 当前房间温度 -T 制冷设定房间温度 And for the ∆T of two consecutive detections 制冷房间温差The comparison is performed, and the target cooling water temperature is corrected based on the comparison results. Then, using the corrected target cooling water temperature, and according to the corrected target outlet or inlet water temperature in step S3.8.1, the compressor operating frequency is controlled using PID calculation. 1) When ∆T 制冷房间温差(n) <∆T 制冷房间温差(n-1) At that time, the current target cooling water temperature is corrected, and the corrected target cooling water temperature is: T 制冷目标水温修正 =T 当前制冷目标水温 +T 制冷水温修正值2 2) When ∆T 制冷房间温差(n) ≥∆T 制冷房间温差(n-1) At this time, the current target cooling water temperature does not need to be corrected, and the current target cooling water temperature is maintained for control. 3) Continuously adjust ∆T 制冷房间温差 Periodic testing is performed, and if the above conditions are met, the target cooling water temperature is continuously corrected. The corrected target cooling water temperature is not higher than the upper limit of the cooling water temperature set by the heat pump / chiller unit. Step S3.9.1: During the above control process, if the temperature-reaching shutdown condition of the aforementioned outlet water temperature or inlet water temperature PID control is detected for 5 consecutive seconds at any time, the machine will stop according to the temperature-reaching shutdown sequence. Then, if the start-up condition of the cooling room temperature control in step S3.6.1 is met... and And satisfy T 房间温度 >T 制冷设定房间温度 -∆T 制冷房间温度停机温差 If the compressor can start and run normally, it will operate at the target cooling water temperature before shutdown, according to step S3.2.1, T. 制冷目标水温 The target outlet or inlet water temperature is used to control the compressor operating frequency using PID control; Step S3.9.2, when T is satisfied 房间温度 ≤T 制冷设定房间温度 -∆T 制冷房间温度停机温差 When the temperature reaches the set point, the machine stops according to the shutdown sequence and enters standby mode. After entering standby mode, if the start-up conditions for the cooling room temperature control in step S3.6.1 are met, the machine starts and runs normally according to the conditions. This process is repeated to achieve precise control of the target room temperature. in: T 气候依赖曲线制冷目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a2 and b2, and water temperature values ​​A2 and B2 can be set. T 制冷设定房间温度 Set the room temperature for cooling; the setting range is 16~30℃, and the default setting is 26℃. ∆T 制冷房间温度启动温差The starting temperature difference for controlling the temperature of the refrigerated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. ∆T 制冷房间温度停机温差 The shutdown temperature difference for controlling the room temperature is set within a range of 0.2~2℃, with a preferred value of 0.5℃. T 制冷目标水温 To achieve the target cooling water temperature, the heat pump / chiller unit initially operates at the aforementioned T... 初始制冷目标水温 The target temperature is set as the objective, and then adjusted according to the conditions. The adjusted target cooling water temperature is then used for control. ΔT 制冷水温启动温差 The starting temperature difference for cooling water temperature control is set within a range of 2~10℃, with a preferred value of 5℃. t 压缩机停机时间 This is tcs min, where tcs depends on the compressor and the default value is 3 min. t 制冷初始预运行时间 min is the time after the heat pump / chiller unit starts up (T). 初始制冷目标水温 The running time can be set within the range of 6 to 120 minutes, with 15 minutes being the preferred value. t 制冷水温修正时间 min is the time interval for detecting changes in room temperature and adjusting water temperature control. The setting range is 2 to 60 minutes, with a preferred value of 5 minutes. ∆T 制冷房间温差 For T 当前房间温度 and T 制冷设定房间温度 The temperature difference value; ∆T 制冷房间温差(n) This is the temperature difference value of the refrigerated room currently being measured and calculated; ∆T 制冷房间温差(n-1) This is the temperature difference value of the refrigerated room calculated from the last test; T 制冷水温修正值1 The set range is 0.5~10℃, with a preferred value of 2℃; T 制冷水温修正值2 The set range is 0.5~10℃, with a preferred value of 1℃.

[0034] In this embodiment, room temperature linkage control is used to simultaneously ensure comfort and energy saving. It achieves intelligent adaptive adjustment of the water supply temperature of the heat pump / chiller unit, reduces room temperature fluctuations, avoids users repeatedly adjusting the target water supply temperature, achieves precise temperature control of the target room, and provides higher thermal comfort for the human body.

[0035] In addition, the control device for the heat pump / cooling system includes a memory and a processor coupled to the memory, the processor being configured to execute the methods of the foregoing embodiments based on instructions stored in the memory.

[0036] Memory may include, for example, system memory, fixed non-volatile storage media, etc. System memory may store, for example, the operating system, application programs, boot loader, and other programs.

[0037] The control unit for a heat pump / chilled water system may also include input / output interfaces, network interfaces, and storage interfaces. These interfaces, as well as the memory and processor, can be connected via a bus, for example. Input / output interfaces provide connection interfaces for input / output devices such as monitors, mice, keyboards, and touchscreens. Network interfaces provide connection interfaces for various networked devices. Storage interfaces provide connection interfaces for external storage devices such as SD cards and USB flash drives.

[0038] The embodiments disclosed in this invention also provide an air source heat pump, including: a heat pump / chilled water system and a control device for the heat pump / chilled water system described in the above embodiments.

[0039] The embodiments disclosed in this invention also provide a computer-readable storage medium, including computer program instructions, which, when executed by a processor, implement the room temperature linkage control method of the heat pump / chiller unit described in any of the above embodiments.

[0040] The various embodiments of the present invention have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0041] Those skilled in the art will understand that the embodiments disclosed in this invention can be provided as methods, systems, or computer program products. Therefore, this invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this invention can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0042] This invention disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that one or more flows in the flowchart illustrations and / or one or more blocks in the block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the functions specified in the flowcharts. Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0043] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0044] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0045] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. All equivalent changes made in accordance with the shape, structure and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for room temperature linkage control of a heat pump / chiller unit, characterized in that, The heat pump / chiller system includes an outdoor heat pump / chiller unit, an indoor temperature controller for controlling the temperature of terminal rooms, an indoor wired controller for controlling the heat pump / chiller unit, an indoor buffer tank for circulating water at the outlet and inlet of the heat pump / chiller unit, an engineering water pump on the water circulation pipe at the outlet of the buffer tank, and multiple terminals. These terminals are located in multiple rooms, each corresponding to one or more rooms. The terminals are used to provide heating or cooling to the corresponding rooms. Each room corresponding to a terminal in the water circulation pipe at the outlet of the buffer tank is connected in parallel to a fan coil unit for heating or cooling, or a radiator for heating, or underfloor heating. The heating coil, each radiator's corresponding inlet pipe is equipped with a two-way valve to control the pipe's on / off state, and each underfloor heating coil's inlet pipe is also equipped with a mixing proportioning valve, a mixing pump, and a mixing temperature sensor; the heat pump / chiller unit includes a compressor, a first heat exchanger installed outdoors using water cooling by a pump unit, a second heat exchanger installed outdoors using air cooling by a fan, and a variable frequency water pump. The variable frequency water pump is connected to the first heat exchanger through a water pipe and pumps out the water after water cooling and heat exchange. The compressor is connected between the first and second heat exchangers through a refrigerant pipe and a four-way valve. The outlet pipe connected to the first heat exchanger is also equipped with an auxiliary electric heater to preheat the initial outlet water; the room temperature linkage control method of the heat pump / chiller unit includes the following steps: Step S1: Start the heat pump / chiller unit; Step S2, when the heat pump / chiller unit enters the heating control mode, Step S2.1: The ambient temperature sensor of the heat pump / chiller unit detects whether the ambient temperature is within the allowable operating range for heating, and at the same time detects whether the heat pump / chiller unit is in a fault-free or protection state. Step S2.2: If the heating is within the allowable operating range and the heat pump / chiller unit has no faults or protection, calculate the initial target heating water temperature and check whether the room temperature and water temperature meet the heating start-up conditions. Step S2.3: If the operation is outside the allowable range for heating, or if there is a fault or protection issue with the heat pump / chiller unit, then enter the heating standby state. Step S2.4: If the room temperature and water temperature detected in step S2.2 do not meet the heating start-up conditions, then enter the heating standby state in step S2.

3. Step S2.5: In the heating standby state of step S2.3, the ambient temperature sensor of the heat pump / chiller unit checks again whether the ambient temperature is within the allowable operating range for heating, and at the same time checks whether the heat pump / chiller unit is in a fault-free or protection state. If not, proceed to step S2.2 to check again. Step S2.6: When the room temperature and water temperature meet the heating start-up conditions detected in step S2.2, the heat pump / chiller unit enters the initialization operation for heating start-up. After the initialization operation is completed, the compressor enters PID control. Step S2.7, run t 制热初始预运行时间 Then, the room temperature and water temperature are controlled together. Step S2.8: Real-time detection of room temperature, and every t... 制热水温修正时间 The temperature difference between the set room temperature and the current room temperature is detected and compared. The target heating water temperature is corrected based on the comparison results, and PID control is performed using the corrected target heating water temperature. Step S2.9, then determine whether the room temperature meets the shutdown conditions; If step S2.10 is not satisfied, return to step S2.8 to correct the target heating water temperature and perform PID control again; Step S2.11: If satisfied, return to the heating standby state in step S2.3; Step S3, when the heat pump / chiller unit enters the cooling control mode, Step S3.1: The ambient temperature sensor of the heat pump / chiller unit detects whether the ambient temperature is within the allowable operating range for cooling, and at the same time detects whether the heat pump / chiller unit is in a fault-free or protection state. Step S3.2: If the cooling operation is within the allowable range and the heat pump / chiller unit has no faults or protection, calculate the initial target cooling water temperature and check whether the room temperature and water temperature meet the cooling start-up conditions. Step S3.3: If the operation is outside the allowable range of refrigeration, or if the heat pump / chiller unit has a fault or protection, then enter the refrigeration standby state. Step S3.4: If the room temperature and water temperature detected in step S3.2 do not meet the cooling start conditions, then enter the cooling standby state in step S3.

3. Step S3.5: In the standby cooling state of step S3.3, the ambient temperature sensor of the heat pump / chiller unit checks again whether the ambient temperature is within the allowable operating range for cooling, and at the same time checks whether the heat pump / chiller unit is in a fault-free or protection state. If not, proceed to step S3.2 to check again. In step S3.6, when the room temperature and water temperature meet the cooling start conditions in step S3.2, the heat pump / chiller unit enters the initialization operation for cooling start. After the initialization operation is completed, the compressor enters PID control. Step S3.7, run t 制冷初始预运行时间 Then, the room temperature and water temperature are controlled together. Step S3.8: Real-time monitoring of room temperature, and every t... 制冷水温修正时间 The system detects and compares the temperature difference between the set room temperature and the current room temperature, corrects the target cooling water temperature based on the comparison results, and then uses the corrected target cooling water temperature for PID control. Step S3.9, then determine whether the room temperature meets the shutdown conditions; If step S3.10 is not satisfied, return to step S3.8 to correct the target cooling water temperature and perform PID control again; Step S3.11: If the condition is met, return to the cooling standby state in step S3.

3.

2. The room temperature linkage control method for a heat pump / chiller unit according to claim 1, characterized in that, Steps S2.2, S2.6, S2.7, S2.8, and S2.9 further include: Step S2.2.1, Set T 制热目标水温 To achieve the target heating water temperature, the heat pump / chiller unit initially operates at a temperature of T... 初始制热目标水温 The target heating water temperature is used as the heating target water temperature, and then it is corrected according to the conditions using Formula 1. The corrected target heating water temperature is then used for control. T 初始制热目标水温 =Min(T 气候依赖曲线制热目标水温 T 热泵制热最高水温 )---Formula 1 In Formula 1, the target water temperature for heating can be selected as the outlet water temperature or inlet water temperature of the heat pump / chiller unit, with the outlet water temperature as the default. T 气候依赖曲线制热目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a1 and b1 and water temperature values ​​A1 and B1 can be set. in: The setting range for a1 is -25~25℃, with a preferred value of -20℃. b1 is set within the range of -25 to 25℃, with a preferred value of 20℃, and b1 > a1; The A1 setting range is 20~80℃, with a preferred value of 25℃; The range of B1 is set to 20~80℃, with a preferred value of 55℃, and B1>A1; Step S2.2.2: The heat pump / chiller unit will not start and will continuously monitor the indoor room temperature and water temperature when any of the following conditions are met; specifically, the following conditions are included: T 房间温度 >T 制热设定房间温度 -∆T 制热房间温度启动温差 ; T 出水温度 >Min(T 制热目标水温 -ΔT 制热水温启动温差 ,T 热泵制热最高水温 -5); T 进水温度 >Min(T 制热目标水温 -ΔT 制热水温启动温差 ,T 热泵制热最高水温 -5); t 压缩机停机时间 <tcs min; Step S2.6.1: When the following conditions are met simultaneously, the two-way valve and the mixing proportioner valve will activate, the variable frequency water pump, the engineering water pump, and the mixing water pump will all start, and the variable frequency water pump of the heat pump / chiller unit will start running at the initialization position. 水泵初始化时间 Afterwards, if the water flow switch is closed for 10 consecutive seconds, the electronic expansion valve is adjusted to the initial step number, the fan of the second heat exchanger starts running at the initial speed, and the compressor starts running at the initial frequency 30 seconds after the fan starts running. The heat pump / chiller unit enters the initialization control. Specifically, the following conditions are included: T 房间温度 ≤T 制热设定房间温度 -∆T 制热房间温度启动温差 ; T 出水温度 ≤Min(T 制热目标水温 -ΔT 制热水温启动温差 ,T 热泵制热最高水温 -5); T 进水温度 ≤Min(T 制热目标水温 -ΔT 制热水温启动温差 ,T 热泵制热最高水温 -5); t 压缩机停机时间 ≥tcs min; Step S2.7.1: After the compressor initialization operation is completed, according to the detected T... 房间温度 and T 水温 The initial target heating water temperature T 初始制热目标水温 PID control is used to adjust the compressor's operating frequency, and the operation time is t. 制热初始预运行时间 Adjust according to the following conditions after min; Step S2.8.1, when T 房间温度 <T 制热设定房间温度 At time, every t 制热水温修正时间 The system detects the indoor room temperature and calculates the room temperature deviation ∆T. 制热房间温差 (∆T 制热房间温差 =T 制热设定房间温度 -T 当前房间温度 ), and for two consecutive detections of ∆T 制热房间温差 The comparison is performed, and the target heating water temperature is corrected based on the comparison results. The corrected target heating water temperature is then compared with the highest heating water temperature of the heat pump according to Formula 2. T 制热目标水温 =Min(T 制热目标水温修正 T 热泵制热最高水温 )---Formula 2 T 制热目标水温 Based on the target outlet or inlet water temperature of the heat pump / chiller unit in step S2.2.1, perform PID calculations to control the compressor operating frequency: 1) When ∆T 制热房间温差(n) ≥∆T 制热房间温差(n-1) At that time, the current target water temperature is corrected, and the corrected target water temperature is: T 制热目标水温修正 =T 当前制热目标水温 +T 制热水温修正值1 2) When ∆T 制热房间温差(n) <∆T 制热房间温差(n-1) At this time, the current target heating water temperature does not need to be corrected, and the current target heating water temperature is maintained for control. 3) Continuously adjust ∆T 制热房间温差 Periodic testing is conducted, and if the above conditions are met, the target heating water temperature is continuously corrected. The corrected target heating water temperature is not higher than the maximum allowable heating water temperature limit of the heat pump / chiller unit. Step S2.8.2, when T 制热设定房间温度 ≤T 房间温度 <T 制热设定房间温度 +∆T 制热房间温度停机温差 At time, every t 制热水温修正时间 min, detect the indoor room temperature and calculate the room temperature deviation ∆T 制热房间温差 ∆T 制热房间温差 =T 制热设定房间温度 -T 当前房间温度 And for the ∆T of two consecutive detections 制热房间温差 The comparison is performed, and the target heating water temperature is corrected based on the comparison results. The corrected target heating water temperature is then used according to T in Formula 2. 制热目标水温 Based on the target outlet or inlet water temperature, PID calculations are used to control the compressor's operating frequency. 1) When ∆T 制热房间温差(n) <∆T 制热房间温差(n-1) At that time, the current target heating water temperature is corrected, and the corrected target heating water temperature is: T 制热目标水温修正 =T 当前制热目标水温 -T 制热水温修正值2 2) When ∆T 制热房间温差(n) ≥∆T 制热房间温差(n-1) At this time, the current target heating water temperature does not need to be corrected, and the current target heating water temperature is maintained for control. 3) Continuously adjust ∆T 制热房间温差 Periodic testing is conducted, and if the above conditions are met, the target heating water temperature is continuously corrected. The corrected target heating water temperature is not lower than the lower limit of the heat pump water temperature allowed by the heat pump / chiller unit. Step S2.9.1: During the above control process, if T is detected for 5 consecutive seconds at any time... 制热目标水温 If the target outlet or inlet water temperature is met by the PID control to reach the set temperature and then the compressor stops according to the temperature-point shutdown sequence, the compressor will continue to operate if the auxiliary electric heater or external heat source is running until the set heating room temperature is reached. Then, if the start-up conditions for heating room temperature control in step S2.6.1 are met... and And satisfy T 房间温度 <T 制热设定房间温度 +∆T 制热房温停机温差 If the compressor can start and run normally, it will operate at the target heating water temperature before shutdown, according to step S2.2.1, T. 制热目标水温 The target outlet or inlet water temperature is used to control the compressor operating frequency using PID control; Step S2.9.2, when T is satisfied 房间温度 ≥T 制热设定房间温度 +∆T 制热房间温度停机温差 When the temperature reaches the set point, the machine stops according to the shutdown sequence and enters standby mode. After entering standby mode, if the start-up conditions for the heating room temperature control in step S2.6.1 are met, the machine starts and runs normally according to the conditions. This process is repeated to achieve precise control of the target room temperature. in: T 气候依赖曲线制热目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a1 and b1 and water temperature values ​​A1 and B1 can be set. T 制热设定房间温度 Set the room temperature for heating; the setting range is 16~30℃, and the default setting is 18℃. ∆T 制热房间温度启动温差 The starting temperature difference for controlling the temperature of the heated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. ∆T 制热房间温度停机温差 The shutdown temperature difference for controlling the temperature of the heated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. T 制热目标水温 To achieve the target heating water temperature, the heat pump / chiller unit initially operates at the aforementioned T... 初始制热目标水温 The target temperature is set as the objective, and then adjusted according to the conditions. The adjusted target heating water temperature is then used for control. ΔT 制热水温启动温差 The starting temperature difference for hot water temperature control is set within a range of 2~10℃, with a preferred value of 5℃. T 热泵制热最高水温 The maximum water temperature that a heat pump can achieve is determined based on the operating range of the compressor used in the heat pump / chiller unit. The maximum water temperature for heat pump heating varies depending on the outdoor ambient temperature. t 压缩机停机时间 This is tcs min, where tcs depends on the compressor and the default value is 3 min. t 制热初始预运行时间 min is the time after the heat pump / chiller unit starts up (T). 初始制热目标水温 The running time can be set within the range of 6 to 120 minutes, with 15 minutes being the preferred value. t 制热水温修正时间 min is the time interval for detecting changes in room temperature and adjusting water temperature control. The setting range is 2 to 60 minutes, with a preferred value of 5 minutes. ∆T 制热房间温差 For T 制热设定房间温度 and T 当前房间温度 The temperature difference value; ∆T 制热房间温差(n) This is the temperature difference value of the heating room currently being measured and calculated; ∆T 制热房间温差(n-1) This is the temperature difference value of the heated room calculated from the last test; T 制热水温修正值1 The set range is 0.5~10℃, with a preferred value of 2℃; T 制热水温修正值2 The set range is 0.5~10℃, with a preferred value of 1℃.

3. The room temperature linkage control method for a heat pump / chiller unit according to claim 2, characterized in that, Step S2.6.1 also includes: if the water flow switch is detected to be disconnected for 10 consecutive seconds, a water flow abnormality protection will be reported, the started load will stop, and the protection will automatically recover after 3 minutes. If the water flow abnormality protection occurs 3 times in 1 hour, the heat pump / chiller unit will be locked and not allowed to start. The heat pump / chiller unit will report a water flow abnormality protection, and power outage maintenance or manual fault clearing is required to restore the start judgment, so as to ensure the reliable and safe operation of the heat pump / chiller unit.

4. The room temperature linkage control method for a heat pump / chiller unit according to claim 1, characterized in that, Steps S3.2, S3.6, S3.7, S3.8, and S3.9 further include: Step S3.2.1, Set T 制冷目标水温 To achieve the target cooling water temperature, the heat pump / chiller unit initially operates at a temperature of T. 初始制冷目标水温 The target cooling water temperature is used as the cooling target water temperature, and then it is corrected according to the conditions using Formula 3. The corrected target cooling water temperature is then used for control. T 初始制冷目标水温 = T 气候依赖曲线制冷目标水温 ---Formula 3 The target cooling water temperature in Formula 3 can be selected as the outlet water temperature or inlet water temperature of the heat pump / chiller unit, with the outlet water temperature as the default. T 气候依赖曲线制冷目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a2 and b2, and water temperature values ​​A2 and B2 can be set. in: The a2 setting range is 5~35℃, with a preferred value of 15℃; b2 is set within the range of 5~35℃, with a preferred value of 30℃, and b2 > a2; The A2 setting range is 5~25℃, with a preferred value of 7℃; The setting range for B2 is 5~25℃, with a preferred value of 18℃, and B2 > A2; Step S3.2.2: The heat pump / chiller unit will not start and will continuously monitor room temperature and water temperature when any of the following conditions are met; specifically, the following conditions are included: T 房间温度 <T 制冷设定房间温度 +∆T 制冷房间温度启动温差 ; T 出水温度 <T 制冷目标水温 +∆T 制冷水温启动温差 ; T 进水温度 <T 制冷目标水温 +∆T 制冷水温启动温差 ; t 压缩机停机时间 <tcs min; Step S3.6.1: When the following conditions are met simultaneously, the two-way valve and mixing proportional valve will activate, the variable frequency water pump, the engineering water pump, and the mixing water pump will all start, and the variable frequency water pump of the heat pump / chiller unit will start running at the initialization position. 水泵初始化时间 Afterwards, if the water flow switch is closed for 10 consecutive seconds, the electronic expansion valve is adjusted to the initial step number, the fan of the second heat exchanger starts running at the initial speed, the compressor starts running at the initial frequency 30 seconds after the fan starts running, the four-way valve is energized and reversed 20 seconds after the compressor starts running, and the heat pump / chiller unit enters the initialization control. Specifically, the following conditions are included: T 房间温度 ≥T 制冷设定房间温度 +∆T 制冷房间温度启动温差 ; T 出水温度 ≥T 制冷目标水温 +∆T 制冷水温启动温差 ; T 进水温度 ≥T 制冷目标水温 +∆T 制冷水温启动温差 ; t 压缩机停机时间 ≥tcs min; Step S3.7.1: After the compressor initialization operation is completed, based on the detected T... 房间温度 and T 水温 With the initial target cooling water temperature T 初始制冷目标水温 PID control is used to adjust the compressor's operating frequency, and the operation time is t. 制冷初始预运行时间 After min, adjust according to the following conditions: Step S3.8.1, when T 房间温度 >T 制冷设定房间温度 At time, every t 制冷水温修正时间 The system detects the indoor room temperature and calculates the temperature deviation ∆T of the cooled room. 制冷房间温差 (∆T 制冷房间温差 =T 当前房间温度 -T 制冷设定房间温度 ), and for two consecutive detections of ∆T 制冷房间温差 The comparison is performed, and the target cooling water temperature is corrected based on the comparison results. The corrected target cooling water temperature is then used to perform PID calculations to control the compressor operating frequency according to the target outlet or inlet water temperature of the heat pump / chiller unit in step S3.2.

1. 1) When ∆T 制冷房间温差(n) ≥∆T 制冷房间温差(n-1) At that time, the current target cooling water temperature is corrected, and the corrected target cooling water temperature is: T 制冷目标水温修正 =T 当前制冷目标水温 -T 制冷水温修正值1 2) When ∆T 制冷房间温差(n) <∆T 制冷房间温差(n-1) At this time, the current target cooling water temperature does not need to be corrected, and the current target cooling water temperature is maintained for control. 3) Continuously adjust ∆T 制冷房间温差 Periodic testing is conducted, and if the above conditions are met, the target cooling water temperature is continuously corrected. The corrected target cooling water temperature is not lower than the lower limit of the cooling water temperature set by the heat pump / chiller unit. Step S3.8.2, when T 制冷设定房间温度 -∆T 制冷房间温度停机温差 <T 房间温度 ≤T 制冷设定房间温度 At time, every t 制冷水温修正时间 The system detects the indoor room temperature and calculates the room temperature deviation ∆T. 制冷房间温差 ∆T 制冷房间温差 =T 当前房间温度 -T 制冷设定房间温度 And for the ∆T of two consecutive detections 制冷房间温差 The comparison is performed, and the target cooling water temperature is corrected based on the comparison results. Then, using the corrected target cooling water temperature, and according to the corrected target outlet or inlet water temperature in step S3.8.1, the compressor operating frequency is controlled using PID calculation. 1) When ∆T 制冷房间温差(n) <∆T 制冷房间温差(n-1) At that time, the current target cooling water temperature is corrected, and the corrected target cooling water temperature is: T 制冷目标水温修正 =T 当前制冷目标水温 +T 制冷水温修正值2 2) When ∆T 制冷房间温差(n) ≥∆T 制冷房间温差(n-1) At this time, the current target cooling water temperature does not need to be corrected, and the current target cooling water temperature is maintained for control. 3) Continuously adjust ∆T 制冷房间温差 Periodic testing is performed, and if the above conditions are met, the target cooling water temperature is continuously corrected. The corrected target cooling water temperature is not higher than the upper limit of the cooling water temperature set by the heat pump / chiller unit. Step S3.9.1: During the above control process, if the temperature-reaching shutdown condition of the aforementioned outlet water temperature or inlet water temperature PID control is detected for 5 consecutive seconds at any time, the machine will stop according to the temperature-reaching shutdown sequence. Then, if the start-up condition of the cooling room temperature control in step S3.6.1 is met... and And satisfy T 房间温度 >T 制冷设定房间温度 -∆T 制冷房间温度停机温差 If the compressor can start and run normally, it will operate at the target cooling water temperature before shutdown, according to step S3.2.1, T. 制冷目标水温 The target outlet or inlet water temperature is used to control the compressor operating frequency using PID control; Step S3.9.2, when T is satisfied 房间温度 ≤T 制冷设定房间温度 -∆T 制冷房间温度停机温差 When the temperature reaches the set point, the machine stops according to the shutdown sequence and enters standby mode. After entering standby mode, if the start-up conditions for the cooling room temperature control in step S3.6.1 are met, the machine starts and runs normally according to the conditions. This process is repeated to achieve precise control of the target room temperature. in: T 气候依赖曲线制冷目标水温 Based on the climate dependence curve, outdoor ambient temperature values ​​a2 and b2, and water temperature values ​​A2 and B2 can be set. T 制冷设定房间温度 Set the room temperature for cooling; the setting range is 16~30℃, and the default setting is 26℃. ∆T 制冷房间温度启动温差 The starting temperature difference for controlling the temperature of the refrigerated room is set within a range of 0.2~2℃, with a preferred value of 0.5℃. ∆T 制冷房间温度停机温差 The shutdown temperature difference for controlling the room temperature is set within a range of 0.2~2℃, with a preferred value of 0.5℃. T 制冷目标水温 To achieve the target cooling water temperature, the heat pump / chiller unit initially operates at the aforementioned T... 初始制冷目标水温 The target temperature is set as the objective, and then adjusted according to the conditions. The adjusted target cooling water temperature is then used for control. ΔT 制冷水温启动温差 The starting temperature difference for cooling water temperature control is set within a range of 2~10℃, with a preferred value of 5℃. t 压缩机停机时间 This is tcs min, where tcs depends on the compressor and the default value is 3 min. t 制冷初始预运行时间 min is the time after the heat pump / chiller unit starts up (T). 初始制冷目标水温 The running time can be set within the range of 6 to 120 minutes, with 15 minutes being the preferred value. t 制冷水温修正时间 min is the time interval for detecting changes in room temperature and adjusting water temperature control. The setting range is 2 to 60 minutes, with a preferred value of 5 minutes. ∆T 制冷房间温差 For T 当前房间温度 and T 制冷设定房间温度 The temperature difference value; ∆T 制冷房间温差(n) This is the temperature difference value of the refrigerated room currently being measured and calculated; ∆T 制冷房间温差(n-1) This is the temperature difference value of the refrigerated room calculated from the last test; T 制冷水温修正值1 The set range is 0.5~10℃, with a preferred value of 2℃; T 制冷水温修正值2 The set range is 0.5~10℃, with a preferred value of 1℃.

5. The room temperature linkage control method for a heat pump / chiller unit according to claim 1, characterized in that, Step S3.6.1 also includes: if the water flow switch is detected to be disconnected for 10 consecutive seconds, a water flow abnormality protection will be reported, the started load will stop, and the protection will automatically recover after 3 minutes. If the water flow abnormality protection occurs 3 times in 1 hour, the heat pump / chiller unit will be locked and not allowed to start. The heat pump / chiller unit will report a water flow abnormality protection, and power outage maintenance or manual fault clearing can be performed to restore the start judgment, so as to ensure the reliable and safe operation of the heat pump / chiller unit.

6. A control device for a heat pump / chilled water system, characterized in that, include: Memory; and A processor coupled to the memory is configured to execute, based on instructions stored in the memory, a room temperature linkage control method for a heat pump / chiller unit as described in any one of claims 1 to 5.

7. A heat pump / chiller unit, characterized in that, include: Heat pump / chilled water system; and A control device for a heat pump / cooling water system according to claim 6.

8. A computer-readable storage medium, characterized in that, It includes computer program instructions, wherein when the computer program instructions are executed by a processor, they implement the room temperature linkage control method of any one of claims 1 to 5 for a heat pump / chiller unit.

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