Control method and control device for floor heating system and floor heating system

Abstract

This application relates to the field of heat pump system technology, and discloses a control method for a floor heating system. The floor heating system includes a refrigerant-side flow path and a water-side flow path. The refrigerant-side flow path is equipped with a compressor and a floor heating valve, and the water-side flow path is equipped with a water pump. The method includes: continuously acquiring the real-time water-side temperature of the floor heating system and the indoor ambient temperature when the real-time water-side temperature meets the conditions for waste heat supply; controlling the compressor to stop running and controlling the floor heating valve and water pump to remain open when the real-time water-side temperature and the indoor ambient temperature meet the conditions for waste heat supply withdrawal; and controlling the compressor to restart when the real-time water-side temperature and the indoor ambient temperature meet the conditions for waste heat supply withdrawal. This application can continue to utilize the system's residual heat for heating during the compressor shutdown phase, slowing down the rate of indoor temperature drop, extending the compressor's single shutdown time, which helps reduce frequent compressor start-stop, lowers power consumption, and reduces operating noise. This application also discloses a control device and a floor heating system for a floor heating system.

Description

Technical Field

[0001] This application relates to the field of heat pump system technology, for example to a control method, control device and floor heating system for floor heating systems. Background Technology

[0002] Currently, underfloor heating systems typically heat the circulating water through a refrigerant-side flow path and a water-side flow path, then supply heat to the indoor terminals. During this process, the compressor's operating status directly affects the system's heating capacity, energy consumption, and indoor temperature stability. Based on this, a compressor control method has been proposed, which involves detecting both the indoor ambient temperature and the compressor's return water temperature; comparing these temperatures with preset ambient and return water temperatures; and controlling the compressor based on the comparison results.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: While related technologies can control compressor start-up and shutdown based on temperature parameters, they typically shut down directly once the system reaches shutdown conditions, without fully considering the continued utilization of remaining system heat. Because the water-side circulating water has a large heat capacity, and underfloor heating heat transfer has a certain lag, if the water pump and underfloor heating valves close simultaneously after shutdown, the remaining system heat is difficult to continue being used for indoor heating. This can easily lead to a rapid drop in indoor temperature, causing the compressor to restart, resulting in frequent compressor start-ups and shutdowns, ultimately leading to high power consumption and excessive noise.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a control method, control device, and floor heating system for a floor heating system, which helps to reduce frequent compressor start-stop, while reducing power consumption and operating noise.

[0007] In some embodiments, the underfloor heating system includes a refrigerant-side flow path and a water-side flow path capable of heat exchange. The refrigerant-side flow path is equipped with a compressor and an underfloor heating valve, and the water-side flow path is equipped with a water pump. The control method includes: when the underfloor heating system is operating in heating mode, continuously acquiring the real-time water-side temperature of the underfloor heating system and the indoor ambient temperature; when the real-time water-side temperature meets the conditions for waste heat supply, controlling the compressor to stop operating and controlling the underfloor heating valve and water pump to remain open; when the real-time water-side temperature and the indoor ambient temperature meet the conditions for waste heat supply withdrawal, controlling the compressor to restart.

[0008] In some embodiments, the control device includes a processor and a memory storing program instructions, the processor being configured to execute the control method for a floor heating system described above when the program instructions are executed.

[0009] In some embodiments, the underfloor heating system includes: a refrigerant-side flow path, equipped with a compressor and an underfloor heating valve; a water-side flow path, equipped with a water pump, wherein the water-side flow path can exchange heat with the refrigerant-side flow path; and the control device for the underfloor heating system described above is electrically connected to the compressor, the underfloor heating valve, and the water pump, respectively.

[0010] The control method, control device, and floor heating system for floor heating systems provided in this disclosure can achieve the following technical effects: During the operation of the underfloor heating system, this embodiment continuously acquires the real-time water-side temperature and indoor ambient temperature. When the real-time water-side temperature meets the conditions for waste heat supply, the compressor is stopped, while the underfloor heating valve and water pump remain continuously open, allowing the circulating water in the water-side flow path to continue flowing and releasing heat to the indoor terminals. When the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal, the compressor is restarted to resume heating the circulating water in the water-side flow path. Therefore, this embodiment can continue to utilize the system's remaining heat for heating during the compressor shutdown phase, further releasing the heat accumulated in the water-side, thereby slowing the rate of indoor temperature drop and extending the compressor's single shutdown duration. This helps reduce frequent compressor start-stop cycles, while also reducing power consumption and operating noise.

[0011] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1This is a schematic diagram of the structure of a floor heating system provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of a control method for a floor heating system provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of another control method for a floor heating system provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of another control method for a floor heating system provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of another control method for a floor heating system provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of a control device for a floor heating system provided in an embodiment of this disclosure.

[0013] Figure label: 100: Fluorine-side flow path; 200: Water-side flow path; 10: Compressor; 20: Water-fluorine heat exchanger; 30: Underfloor heating valve; 40: Outdoor heat exchanger; 50: Water pump; 60: Underfloor heating coil; 70: Expansion tank; 81: First temperature sensor; 82: Second temperature sensor; 83: Third temperature sensor; 84: Fourth temperature sensor; 90: Control device for underfloor heating system; 91: Processor; 92: Memory; 93: Communication interface; 94: Bus. Detailed Implementation

[0014] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0015] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0016] Unless otherwise stated, the term "multiple" means two or more.

[0017] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0018] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0019] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0020] Combination Figure 1 As shown in the figure, this disclosure provides a floor heating system, including: a refrigerant-side flow path 100 and a water-side flow path 200 capable of heat exchange. The refrigerant-side flow path 100 is equipped with a compressor 10 and a floor heating valve 30. The water-side flow path 200 is equipped with a water pump 50.

[0021] By adopting the underfloor heating system provided in this embodiment, and by establishing a synergistic heat exchange relationship between the refrigerant side flow path 100 and the water side flow path 200, and by configuring the compressor 10, the underfloor heating valve 30 and the water pump 50 respectively, the underfloor heating system can be equipped with the ability to heat the circulating water and continuously deliver it to the indoor terminal, thereby facilitating the stable heating of the underfloor heating system.

[0022] Optionally, the underfloor heating system also includes a water-refrigerant heat exchanger 20. The water-refrigerant heat exchanger 20 is installed on both the refrigerant-side flow path 100 and the water-side flow path 200 to facilitate heat exchange between them. Thus, by installing the water-refrigerant heat exchanger 20, the heat from the high-temperature refrigerant in the refrigerant-side flow path 100 can be transferred to the circulating water in the water-side flow path 200, allowing the circulating water to release heat as it flows through the indoor terminals, thereby improving the system's heat utilization efficiency.

[0023] Optionally, the underfloor heating system also includes an outdoor heat exchanger 40. The compressor 10, water-refrigerant heat exchanger 20, underfloor heating valve 30, and outdoor heat exchanger 40 are connected in sequence via refrigerant piping to form a refrigerant-side flow path 100. This allows the refrigerant to circulate in the refrigerant-side flow path 100, thereby ensuring the continuous heating process of the underfloor heating system.

[0024] Optionally, the underfloor heating system also includes underfloor heating coils 60. The underfloor heating coils 60 are installed in the water-side flow path 200 and connected to the inlet and outlet pipes of the water-refrigerant heat exchanger 20. In this way, by installing the underfloor heating coils 60, the circulating water heated by the water-refrigerant heat exchanger 20 can continuously release heat at the indoor end, thereby achieving relatively uniform underfloor heating.

[0025] Optionally, the underfloor heating system also includes an expansion tank 70. The expansion tank 70 is installed in the inlet pipe of the water-fluoride heat exchanger 20. In this way, by installing the expansion tank 70 in the inlet pipe of the water-fluoride heat exchanger 20, the volume expansion and pressure fluctuations caused by temperature changes in the water-side flow path 200 can be buffered, thereby improving the stability of the operation of the water-side flow path 200.

[0026] Optionally, the water pump 50 is installed in the inlet pipe of the water-fluorine heat exchanger 20. In this way, by installing the water pump 50 in the inlet pipe of the water-fluorine heat exchanger 20, the circulating water in the water-side flow path 200 can be driven to flow continuously, and it is beneficial to make the circulating water flow more smoothly through the water-fluorine heat exchanger 20 and the underfloor heating coil 60, thereby ensuring the heat exchange efficiency during the normal heating stage, and also facilitating the continued delivery and release of the system's residual heat during the compressor shutdown stage.

[0027] Optionally, the underfloor heating system also includes a first temperature sensor 81. The first temperature sensor 81 is installed in the outlet water pipe of the water-refrigerant heat exchanger 20 to detect the real-time outlet water temperature. In this way, by setting the first temperature sensor 81 to detect the real-time outlet water temperature, the temperature status of the outlet water side of the water flow path 200 can be reflected, which is helpful in determining whether the underfloor heating system meets the conditions for waste heat supply entry and / or waste heat supply exit.

[0028] Optionally, the underfloor heating system also includes a second temperature sensor 82. The second temperature sensor 82 is installed in the inlet water pipe of the water-refrigerant heat exchanger 20 to detect the real-time inlet water temperature. In this way, by setting the second temperature sensor 82 to detect the real-time inlet water temperature, the temperature status of the inlet water side of the water flow path 200 can be reflected, which is helpful in determining whether the underfloor heating system meets the conditions for waste heat supply entry and / or waste heat supply exit.

[0029] Optionally, the underfloor heating system also includes a third temperature sensor 83. The third temperature sensor 83 is installed on the floor above the underfloor heating coil 60 to detect the indoor ambient temperature. In this way, by setting the third temperature sensor 83 to detect the indoor ambient temperature, the temperature status of the indoor environment can be reflected, which is helpful in determining whether the underfloor heating system meets the conditions for waste heat supply entry and / or waste heat supply exit.

[0030] Optionally, the underfloor heating system also includes a fourth temperature sensor 84. The fourth temperature sensor 84 is disposed on the outer casing of the outdoor heat exchanger 40 and is used to detect the outdoor ambient temperature. In this way, by setting the fourth temperature sensor 84 to detect the outdoor ambient temperature, the temperature state of the outdoor environment can be reflected, which is helpful in determining the first target temperature difference and / or the second target temperature difference.

[0031] Optionally, the underfloor heating system also includes a control device 90 for the underfloor heating system. The control device 90 is electrically connected to the compressor 10, the underfloor heating valve 30, and the water pump 50, respectively. In this way, the embodiments of the present disclosure can execute corresponding control methods through the control device 90 to continue to use the remaining heat of the system for heating during the compressor shutdown phase, thereby helping to reduce frequent compressor start-stop, while reducing power consumption and operating noise.

[0032] Based on the above-mentioned underfloor heating system, combined with Figure 2 As shown, this disclosure provides a control method for a floor heating system, including: S101, the control device continuously acquires the real-time water-side temperature of the underfloor heating system and the indoor ambient temperature when the underfloor heating system is in heating operation.

[0033] S102, when the real-time water side temperature meets the conditions for waste heat to enter the heating system, the control device controls the compressor to stop running and controls the floor heating valve and water pump to continue to open.

[0034] S103, when the real-time water side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal, the control device controls the compressor to restart.

[0035] The control method for a floor heating system provided in this disclosure continuously acquires the real-time water-side temperature and indoor ambient temperature during the heating operation of the floor heating system. When the real-time water-side temperature meets the conditions for waste heat supply, the compressor is stopped, while the floor heating valve and water pump remain continuously open, allowing the circulating water in the water-side flow path to continue flowing and releasing heat to the indoor terminals. When the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal, the compressor is restarted to resume heating the circulating water in the water-side flow path. Therefore, this disclosure allows the system to continue using residual heat for heating during compressor shutdown, further releasing the heat accumulated in the water-side, thereby slowing the rate of indoor temperature drop and extending the compressor's single shutdown duration. This helps reduce frequent compressor start-stop cycles, while also reducing power consumption and operating noise.

[0036] Optionally, the real-time water-side temperature includes the real-time outlet water temperature and / or the real-time inlet water temperature. Thus, embodiments of this disclosure can set the real-time water-side temperature to the real-time outlet water temperature and / or the real-time inlet water temperature, thereby reflecting the temperature state in the water-side flow path from both the outlet and inlet water sides, which is beneficial for a more comprehensive assessment of the actual level of remaining heat in the underfloor heating system.

[0037] Optionally, the control device determines whether the real-time water temperature meets the conditions for waste heat supply in the following manner: the control device determines that the conditions for waste heat supply are met when the real-time outlet water temperature is greater than or equal to the preset outlet water temperature; and / or, the control device determines that the conditions for waste heat supply are met when the real-time inlet water temperature is greater than or equal to the preset inlet water temperature.

[0038] Thus, in this embodiment of the present disclosure, when the real-time outlet water temperature and / or the real-time inlet water temperature reach the corresponding threshold, the waste heat supply stage is entered, which can ensure that a certain amount of heat is still retained in the water-side flow path when the compressor stops running, thereby facilitating the continued use of the system's residual heat for heating during the compressor shutdown stage.

[0039] Optionally, the preset outlet water temperature can be set to 40℃ to ensure that a certain amount of heat is retained in the water-side flow path when the compressor stops running. The preset outlet water temperature can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0040] Optionally, the preset inlet water temperature can be set to 35℃ to ensure that a certain amount of heat is retained in the water-side flow path when the compressor stops running. The preset inlet water temperature can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0041] Optionally, the control device determines whether the real-time water temperature and the indoor ambient temperature meet the waste heat supply withdrawal conditions in the following manner: the control device determines that the waste heat supply withdrawal conditions are met when the difference between the real-time outlet water temperature and the indoor ambient temperature is less than or equal to the first target temperature difference; and / or, the control device determines that the waste heat supply withdrawal conditions are met when the difference between the real-time inlet water temperature and the indoor ambient temperature is less than or equal to the second target temperature difference.

[0042] Thus, in this embodiment of the present disclosure, when the temperature difference between the real-time outlet water temperature and / or the real-time inlet water temperature and the indoor ambient temperature decreases to the corresponding target temperature difference, the waste heat supply stage is terminated, which indicates that the system’s ability to continue to supply heat independently with the remaining heat has weakened, thereby facilitating the timely restoration of heating of the circulating water in the water-side flow path.

[0043] Optionally, the control device determines the first target temperature difference and / or the second target temperature difference in the following manner: the control device acquires the indoor target temperature and the outdoor ambient temperature; the control device determines the first target temperature difference and / or the second target temperature difference based on the difference between the indoor target temperature and the outdoor ambient temperature.

[0044] Thus, this embodiment of the present disclosure links the first target temperature difference and the second target temperature difference with the indoor target temperature and the outdoor ambient temperature, thereby incorporating the impact of changes in the outdoor environment on the room's heat dissipation rate into the waste heat supply withdrawal conditions, which is beneficial to balancing indoor heating stability and waste heat utilization.

[0045] Optionally, the first target temperature difference is positively correlated with the difference between the indoor target temperature and the outdoor ambient temperature. By maintaining this positive correlation, when the indoor-outdoor temperature difference is large, the exit threshold based on the real-time outlet water temperature can be increased accordingly, allowing the compressor to restart earlier; conversely, when the indoor-outdoor temperature difference is small, the exit threshold based on the real-time outlet water temperature can be decreased accordingly, extending the waste heat heating duration. This approach helps to balance indoor heating stability and waste heat utilization efficiency.

[0046] Optionally, the second target temperature difference is positively correlated with the difference between the indoor target temperature and the outdoor ambient temperature. By maintaining this positive correlation, when the indoor-outdoor temperature difference is large, the exit threshold based on the real-time inlet water temperature can be increased accordingly, allowing the compressor to restart earlier; conversely, when the indoor-outdoor temperature difference is small, the exit threshold based on the real-time inlet water temperature can be decreased accordingly, extending the duration of waste heat heating. This approach helps to balance indoor heating stability and waste heat utilization efficiency.

[0047] Optionally, the control device determines a first target temperature difference and / or a second target temperature difference based on the difference between the indoor target temperature and the outdoor ambient temperature, including: when the difference between the indoor target temperature and the outdoor ambient temperature is less than or equal to a first preset temperature difference, the control device determines the first target temperature difference as t. 11 And / or, determine the second target temperature difference as t 21 The control device determines the first target temperature difference as t when the difference between the indoor target temperature and the outdoor ambient temperature is greater than the first preset temperature difference and less than or equal to the second preset temperature difference. 12 And / or, determine the second target temperature difference as t 22 When the difference between the indoor target temperature and the outdoor ambient temperature is greater than the second preset temperature difference, the control device determines the first target temperature difference as t. 13 And / or, determine the second target temperature difference as t 23 Wherein, the first preset temperature difference is less than the second preset temperature difference, t 11 <t 12 <t 13 , t 21 <t 22 <t 23 .

[0048] Thus, this embodiment of the present disclosure can determine a smaller first target temperature difference and / or a smaller second target temperature difference when the indoor and outdoor temperature difference is small, which enables the underfloor heating system to appropriately delay the compressor restart when the outdoor environment is mild, so as to make fuller use of the system's remaining heat; and determine a larger first target temperature difference and / or a larger second target temperature difference when the indoor and outdoor temperature difference is large, which enables the underfloor heating system to appropriately advance the compressor restart when the outdoor environment is cold, so as to slow down the drop in room temperature, thereby helping to balance indoor heating stability and waste heat utilization.

[0049] Optionally, the first preset temperature difference can be set to 12℃ to represent a condition where the indoor and outdoor temperature difference is small and the room heat loss is relatively slow. The first preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0050] Optionally, the second preset temperature difference can be set to 20℃ to represent a condition where the indoor and outdoor temperature difference is large and the room heat loss is relatively fast. The second preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0051] Optionally, t 11 It can be set to 6℃ to appropriately extend the waste heat heating stage under mild outdoor conditions; t 12 It can be set to 8℃ to balance waste heat utilization and insulation requirements under intermediate operating conditions; t 13 It can be set to 10℃ to allow the compressor to resume operation earlier in colder outdoor conditions. 11 t 12 t 13 It can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0052] Optionally, t 21 It can be set to 3℃ to appropriately extend the waste heat heating stage under mild outdoor conditions; t 22 It can be set to 5℃ to balance waste heat utilization and insulation requirements under intermediate operating conditions; t 23 It can be set to 7℃ to allow the compressor to resume operation earlier in colder outdoor conditions. 21 t 22 t 23 It can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0053] Based on the above-mentioned underfloor heating system, combined with Figure 3 As shown in the embodiments of this disclosure, another control method for a floor heating system is provided, including: S201, the control device continuously acquires the real-time water-side temperature of the underfloor heating system and the indoor ambient temperature when the underfloor heating system is in heating operation.

[0054] S202, when the difference between the indoor target temperature and the indoor ambient temperature is greater than the stable temperature difference threshold, the control device controls the compressor, floor heating valve and water pump to continue to operate.

[0055] S203, when the difference between the indoor target temperature and the indoor ambient temperature is less than or equal to the steady temperature difference threshold, the control device determines whether the real-time water side temperature meets the conditions for waste heat to enter the heating system.

[0056] S204, when the real-time water side temperature meets the conditions for waste heat to enter the heating system, the control device controls the compressor to stop running and controls the floor heating valve and water pump to continue to open.

[0057] S205, when the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal, the control device controls the compressor to restart.

[0058] The control method for underfloor heating systems provided in this disclosure, when the difference between the target indoor temperature and the ambient indoor temperature is large, controls the compressor, underfloor heating valve, and water pump to remain continuously running to prioritize ensuring the current heating process continues. Once the difference between the target indoor temperature and the ambient indoor temperature decreases to a stable temperature difference threshold, it is then determined whether to enter the waste heat heating stage. Therefore, this disclosure avoids prematurely stopping the compressor when rapid indoor heating is still required, and continues to utilize the system's remaining heat for heating after the indoor temperature gradually stabilizes, thus balancing heating efficiency and waste heat utilization.

[0059] Optionally, the steady-state temperature difference threshold can be set to 1.5℃ to characterize the transition from a continuous heating phase to a steady-state temperature phase. The steady-state temperature difference threshold can also be adjusted according to the user's actual needs or set to any other reasonable value.

[0060] Based on the above-mentioned underfloor heating system, combined with Figure 4 As shown in the embodiments of this disclosure, another control method for a floor heating system is provided, including: S301, the control device continuously acquires the real-time water-side temperature of the underfloor heating system and the indoor ambient temperature when the underfloor heating system is in heating operation.

[0061] S302, when the real-time water side temperature meets the conditions for waste heat supply, the control device controls the compressor to stop running and controls the floor heating valve and water pump to continue to open.

[0062] S303, the control device adjusts the speed of the water pump based on the difference between the real-time water side temperature and the indoor ambient temperature.

[0063] S304, the control device restarts the compressor when the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal.

[0064] The control method for underfloor heating systems provided in this disclosure adjusts the pump speed based on the difference between the real-time water-side temperature and the indoor ambient temperature during the compressor shutdown phase. This ensures that the circulating water in the water-side flow path continues to supply heat to the indoor terminals in a flow state that matches the current residual heat level. Therefore, this disclosure allows the system to continue supplying heat using residual heat during the compressor shutdown phase, further releasing the heat accumulated in the water side. This slows down the rate of indoor temperature drop and extends the compressor's single shutdown duration, thereby reducing frequent compressor start-stop cycles, lowering power consumption, and reducing operating noise.

[0065] Optionally, the pump speed and the difference between the real-time water-side temperature and the indoor ambient temperature are positively correlated. In this way, by maintaining a positive correlation between the pump speed and the difference between the real-time water-side temperature and the indoor ambient temperature, the circulating water flow rate can be increased when the temperature difference is large to accelerate the release of residual heat from the system to the indoor terminals; and the circulating water flow rate can be reduced when the temperature difference is small to slow down the decay of residual heat in the system.

[0066] Optionally, the control device adjusts the pump speed based on the difference between the real-time water temperature and the indoor ambient temperature, including: adjusting the pump speed to n1 when the difference between the real-time outlet water temperature and the indoor ambient temperature is greater than a third preset temperature difference; adjusting the pump speed to n2 when the difference between the real-time outlet water temperature and the indoor ambient temperature is less than or equal to the third preset temperature difference and greater than a fourth preset temperature difference; and adjusting the pump speed to n3 when the difference between the real-time outlet water temperature and the indoor ambient temperature is less than or equal to the fourth preset temperature difference and greater than a first target temperature difference. Wherein, the third preset temperature difference > the fourth preset temperature difference > the first target temperature difference, and n1 > n2 > n3.

[0067] Thus, the embodiments of this disclosure can adjust the pump speed in stages according to the difference between the real-time outlet water temperature and the indoor ambient temperature, thereby enabling the use of a higher speed when there is sufficient waste heat and the speed to be reduced sequentially as the waste heat gradually decreases, which is beneficial to matching the circulation intensity under different waste heat stages with the current heating demand.

[0068] Optionally, the third preset temperature difference can be set to 18℃ to represent the temperature difference range corresponding to sufficient residual heat. The third preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0069] Optionally, the fourth preset temperature difference can be set to 12℃ to characterize the temperature difference range corresponding to residual heat and other conditions. The fourth preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0070] Optionally, n1 can be set to 100% of the rated speed to accelerate the circulation of circulating water and promote heat release when there is sufficient waste heat; n2 can be set to 70% of the rated speed to balance heat release efficiency and circulation energy consumption when there is moderate waste heat; n3 can be set to 40% of the rated speed to reduce circulation intensity and reduce energy consumption when there is low waste heat. n1, n2, and n3 can also be adjusted according to the user's actual needs, or set to any other reasonable values.

[0071] Optionally, the control device adjusts the pump speed based on the difference between the real-time water temperature and the indoor ambient temperature, including: adjusting the pump speed to n4 when the difference between the real-time inlet water temperature and the indoor ambient temperature is greater than a fifth preset temperature difference; adjusting the pump speed to n5 when the difference between the real-time inlet water temperature and the indoor ambient temperature is less than or equal to the fifth preset temperature difference and greater than a sixth preset temperature difference; and adjusting the pump speed to n6 when the difference between the real-time inlet water temperature and the indoor ambient temperature is less than or equal to the sixth preset temperature difference and greater than a second target temperature difference. Wherein, the fifth preset temperature difference > the sixth preset temperature difference > the second target temperature difference, and n4 > n5 > n6.

[0072] Thus, the embodiments of this disclosure can adjust the pump speed in stages according to the difference between the real-time inlet water temperature and the indoor ambient temperature, thereby enabling the use of a higher speed when there is sufficient residual heat and the speed to be reduced sequentially as the residual heat gradually decreases, which helps to match the circulation intensity under different residual heat stages with the current heating demand.

[0073] Optionally, the fifth preset temperature difference can be set to 14℃ to represent the temperature difference range corresponding to sufficient residual heat. The fifth preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0074] Optionally, the sixth preset temperature difference can be set to 10℃ to characterize the temperature difference range corresponding to residual heat and other conditions. The sixth preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0075] Optionally, n4 can be set to 100% of the rated speed to accelerate the circulation of circulating water and promote heat release when there is sufficient waste heat; n5 can be set to 70% of the rated speed to balance heat release efficiency and circulation energy consumption when there is moderate waste heat; n6 can be set to 40% of the rated speed to reduce circulation intensity and reduce energy consumption when there is low waste heat. n4, n5, and n6 can also be adjusted according to the user's actual needs or set to any other reasonable values.

[0076] Optionally, after the control device restarts the compressor when the real-time water-side temperature and the indoor ambient temperature meet the conditions for waste heat supply withdrawal, the control device also includes: restoring the speed of the water pump.

[0077] In this way, the pump speed is restored after the compressor restarts, for example, to the initial speed when the underfloor heating system just meets the conditions for waste heat supply. This allows the water flow route to smoothly switch back to the normal heating stage from the waste heat supply stage, which is beneficial to ensuring the circulation water delivery effect after reheating.

[0078] Based on the above-mentioned underfloor heating system, combined with Figure 5 As shown in the embodiments of this disclosure, another control method for a floor heating system is provided, including: S401, the control device continuously acquires the real-time water-side temperature of the underfloor heating system and the indoor ambient temperature when the underfloor heating system is in heating operation.

[0079] S402, when the real-time water side temperature meets the conditions for waste heat supply, the control device controls the compressor to stop running and controls the floor heating valve and water pump to continue to open.

[0080] S403, the control device adjusts the opening degree of the floor heating valve according to the difference between the real-time water side temperature and the indoor ambient temperature.

[0081] S404, the control device restarts the compressor when the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal.

[0082] The control method for a floor heating system provided in this disclosure adjusts the opening of the floor heating valve based on the difference between the real-time water-side temperature and the indoor ambient temperature during the compressor shutdown phase. This ensures the valve operates at an opening level that matches the current residual heat level, slowing the transfer of heat from the water-refrigerant heat exchanger side to the outdoor heat exchanger. Therefore, this disclosure allows the system to continue supplying heat using residual heat during compressor shutdown, further releasing accumulated heat in the water side. This slows the rate of indoor temperature drop and extends the compressor's single shutdown duration, thereby reducing frequent compressor start-stop cycles, lowering power consumption, and reducing operating noise.

[0083] Optionally, the opening degree of the underfloor heating valve is negatively correlated with the difference between the real-time water-side temperature and the indoor ambient temperature. This way, by maintaining a negative correlation between the underfloor heating valve opening and the difference between the real-time water-side temperature and the indoor ambient temperature, the valve opening can be appropriately reduced when the temperature difference is large, slowing the transfer of heat from the water-refrigerant heat exchanger side to the outdoor heat exchanger via the refrigerant side, allowing more residual heat to remain on the water side and continue to be used for indoor heating; and when the temperature difference is small, the valve opening can be appropriately increased to facilitate the system's transition from the waste heat heating stage to the reheating stage.

[0084] Optionally, the control device adjusts the opening degree of the underfloor heating valve based on the difference between the real-time water temperature and the indoor ambient temperature, including: adjusting the opening degree of the underfloor heating valve to K1 when the difference between the real-time outlet water temperature and the indoor ambient temperature is greater than a third preset temperature difference; adjusting the opening degree of the underfloor heating valve to K2 when the difference between the real-time outlet water temperature and the indoor ambient temperature is less than or equal to the third preset temperature difference and greater than a fourth preset temperature difference; and adjusting the opening degree of the underfloor heating valve to K3 when the difference between the real-time outlet water temperature and the indoor ambient temperature is less than or equal to the fourth preset temperature difference and greater than a first target temperature difference. Wherein, the third preset temperature difference > the fourth preset temperature difference > the first target temperature difference, and K1 < K2 < K3.

[0085] Thus, in this embodiment, the opening degree of the floor heating valve can be adjusted in stages according to the difference between the real-time outlet water temperature and the indoor ambient temperature. When there is sufficient residual heat, a smaller opening degree can be used to slow down the transfer of heat from the water-fluorine heat exchanger side to the outdoor heat exchanger side via the fluorine side. As the residual heat gradually decreases, the opening degree can be increased sequentially to facilitate the transition of the system from the residual heat supply stage to the reheating stage.

[0086] Optionally, the third preset temperature difference can be set to 18℃ to represent the temperature difference range corresponding to sufficient residual heat. The third preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0087] Optionally, the fourth preset temperature difference can be set to 12℃ to characterize the temperature difference range corresponding to residual heat and other conditions. The fourth preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0088] Optionally, K1 can be set to 20% to maintain a smaller opening when there is sufficient residual heat; K2 can be set to 50% to maintain a medium opening when there is moderate residual heat; and K3 can be set to 80% to maintain a larger opening when there is low residual heat. K1, K2, and K3 can also be adjusted according to the user's actual needs or set to any other reasonable values.

[0089] Optionally, the control device adjusts the opening degree of the underfloor heating valve based on the difference between the real-time water temperature and the indoor ambient temperature, including: adjusting the opening degree of the underfloor heating valve to K4 when the difference between the real-time inlet water temperature and the indoor ambient temperature is greater than a fifth preset temperature difference; adjusting the opening degree of the underfloor heating valve to K5 when the difference between the real-time inlet water temperature and the indoor ambient temperature is less than or equal to the fifth preset temperature difference and greater than a sixth preset temperature difference; and adjusting the opening degree of the underfloor heating valve to K6 when the difference between the real-time inlet water temperature and the indoor ambient temperature is less than or equal to the sixth preset temperature difference and greater than a second target temperature difference. Wherein, the fifth preset temperature difference > the sixth preset temperature difference > the second target temperature difference, and K4 < K5 < K6.

[0090] Thus, in this embodiment, the opening degree of the floor heating valve can be adjusted in stages according to the difference between the real-time inlet water temperature and the indoor ambient temperature. When there is sufficient residual heat, a smaller opening degree can be used to slow down the transfer of heat from the water-fluorine heat exchanger side to the outdoor heat exchanger side via the fluorine side. As the residual heat gradually decreases, the opening degree can be increased sequentially to facilitate the transition of the system from the residual heat supply stage to the reheating stage.

[0091] Optionally, the fifth preset temperature difference can be set to 14℃ to represent the temperature difference range corresponding to sufficient residual heat. The fifth preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0092] Optionally, the sixth preset temperature difference can be set to 10℃ to characterize the temperature difference range corresponding to residual heat and other conditions. The sixth preset temperature difference can also be adjusted according to the user's actual needs, or set to any other reasonable value.

[0093] Optionally, K4 can be set to 20% to maintain a smaller opening when there is sufficient residual heat; K5 can be set to 50% to maintain a medium opening when there is moderate residual heat; and K6 can be set to 80% to maintain a larger opening when there is low residual heat. K4, K5, and K6 can also be adjusted according to the user's actual needs or set to any other reasonable values.

[0094] Optionally, after the control device restarts the compressor when the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal, the control device also includes: restoring the opening of the floor heating valve.

[0095] Thus, in this embodiment of the present disclosure, the opening of the floor heating valve is restored after the compressor is restarted. For example, it can be restored to the initial opening when the floor heating system just meets the conditions for the residual heat supply, thereby enabling the floor heating system to switch from the residual heat supply stage back to the normal heating stage, which is beneficial to ensure the continuous operation of the reheating process.

[0096] Combination Figure 6 This disclosure provides a control device 90 for a floor heating system, including a processor 91 and a memory 92. Optionally, the control device 90 may further include a communication interface 93 and a bus 94. The processor 91, communication interface 93, and memory 92 can communicate with each other via the bus 94. The communication interface 93 can be used for information transmission. The processor 91 can call logical instructions in the memory 92 to execute the control method for the floor heating system described in the above embodiment.

[0097] Furthermore, the logic instructions in the aforementioned memory 92 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0098] The memory 92, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 91 executes functional applications and data processing by running the program instructions / modules stored in the memory 92, thereby implementing the control method for the underfloor heating system in the above embodiments.

[0099] The memory 92 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 92 may include high-speed random access memory and may also include non-volatile memory.

[0100] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for a floor heating system.

[0101] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, such as a USB flash drive, external hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc., and other media capable of storing program code.

[0102] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0103] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0104] The methods and products disclosed in the embodiments herein (including but not limited to devices and equipment) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0105] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method for a floor heating system, characterized in that, The underfloor heating system includes a refrigerant-side flow path and a water-side flow path for heat exchange. The refrigerant-side flow path is equipped with a compressor and an underfloor heating valve, and the water-side flow path is equipped with a water pump. The control method includes: While the underfloor heating system is in heating mode, the real-time water-side temperature of the underfloor heating system and the indoor ambient temperature are continuously acquired. When the real-time water-side temperature meets the conditions for waste heat to enter the heating system, the compressor is controlled to stop running, and the floor heating valve and water pump are controlled to continue to open. When the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal, the compressor is restarted.

2. The control method according to claim 1, characterized in that, Real-time water-side temperature includes real-time outlet water temperature and / or real-time inlet water temperature. The following methods are used to determine if the real-time water-side temperature meets the conditions for waste heat supply: If the real-time outlet water temperature is greater than or equal to the preset outlet water temperature, it is determined that the waste heat supply conditions are met; and / or, If the real-time inlet water temperature is greater than or equal to the preset inlet water temperature, it is determined that the conditions for waste heat supply are met.

3. The control method according to claim 1, characterized in that, Real-time water-side temperature includes real-time outlet water temperature and / or real-time inlet water temperature. The following methods are used to determine whether the real-time water-side temperature and indoor ambient temperature meet the conditions for waste heat supply withdrawal: If the difference between the real-time outlet water temperature and the indoor ambient temperature is less than or equal to the first target temperature difference, the waste heat heating withdrawal condition is deemed met; and / or, If the difference between the real-time inlet water temperature and the indoor ambient temperature is less than or equal to the second target temperature difference, the waste heat heating withdrawal condition is determined to be met.

4. The control method according to claim 3, characterized in that, The first target temperature difference and / or the second target temperature difference are determined in the following ways: Obtain the target indoor temperature and the ambient outdoor temperature; The first target temperature difference and / or the second target temperature difference are determined based on the difference between the indoor target temperature and the outdoor ambient temperature.

5. The control method according to claim 4, characterized in that, Based on the difference between the indoor target temperature and the outdoor ambient temperature, determine the first target temperature difference and / or the second target temperature difference, including: If the difference between the indoor target temperature and the outdoor ambient temperature is less than or equal to the first preset temperature difference, the first target temperature difference is determined to be t. 11 And / or, determine the second target temperature difference as t 21 ; If the difference between the indoor target temperature and the outdoor ambient temperature is greater than the first preset temperature difference but less than or equal to the second preset temperature difference, the first target temperature difference is determined to be t. 12 And / or, determine the second target temperature difference as t 22 ; If the difference between the indoor target temperature and the outdoor ambient temperature is greater than the second preset temperature difference, the first target temperature difference is determined to be t. 13 And / or, determine the second target temperature difference as t 23 ; Wherein, the first preset temperature difference is less than the second preset temperature difference, t 11 <t 12 <t 13 , t 21 <t 22 <t 23 .

6. The control method according to any one of claims 1 to 5, characterized in that, After continuously acquiring the real-time water-side temperature of the underfloor heating system and the indoor ambient temperature while the underfloor heating system is in heating operation, the following also includes: When the difference between the target indoor temperature and the ambient indoor temperature is greater than the stable temperature difference threshold, the compressor, floor heating valve and water pump are kept running continuously. If the difference between the indoor target temperature and the indoor ambient temperature is less than or equal to the stable temperature difference threshold, determine whether the real-time water-side temperature meets the conditions for waste heat to enter the heating system.

7. The control method according to any one of claims 1 to 5, characterized in that, After ensuring the real-time water-side temperature meets the conditions for waste heat supply, the compressor is stopped, and the underfloor heating valve and water pump remain open. This also includes: Adjust the pump speed based on the difference between the real-time water temperature and the indoor ambient temperature; Among them, the pump speed and the difference between the real-time water side temperature and the indoor ambient temperature are positively correlated.

8. The control method according to any one of claims 1 to 5, characterized in that, After ensuring the real-time water-side temperature meets the conditions for waste heat supply, the compressor is stopped, and the underfloor heating valve and water pump remain open. This also includes: Adjust the opening degree of the underfloor heating valve based on the difference between the real-time water temperature and the indoor ambient temperature. Among them, the opening degree of the floor heating valve and the difference between the real-time water side temperature and the indoor ambient temperature are negatively correlated.

9. A control device for a floor heating system, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute, when running the program instructions, the control method for a floor heating system as described in any one of claims 1 to 8.

10. A floor heating system, characterized in that, include: The refrigerant-side flow path is equipped with a compressor and a floor heating valve; The water-side flow path is equipped with a water pump, and the water-side flow path can exchange heat with the fluorine-side flow path; The control device for a floor heating system as described in claim 9 is electrically connected to the compressor, the floor heating valve, and the water pump, respectively.

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