Air-conditioning floor heating system and control method thereof

Abstract

The invention discloses an air-conditioning floor heating system and a control method thereof.The air-conditioning floor heating system comprises a floor heating coil used for supplying heat to the indoor space; the air conditioning unit comprises a compressor, an evaporator, a throttling device and a condenser which are connected in sequence, and the condenser exchanges heat with a water inlet pipe of the floor heating coil and supplies heat to the floor heating coil; the bypass pipeline is arranged in parallel with the condenser and is used for bypassing part of the refrigerant discharged by the compressor; the bypass pipeline penetrates through the heat storage water tank and is used for heating water in the heat storage water tank, and the water in the heat storage water tank exchanges heat with a water inlet pipe of the floor heating coil pipe to heat inlet water of the floor heating coil pipe. The problem that in the prior art, an anti-freezing mode of an air conditioner floor heating system wastes water resources or is high in energy consumption is solved, the situation that a pipeline is damaged due to the fact that water in the floor heating coil pipe is frozen and expanded is prevented, the freezing resistance and the operation stability of the floor heating coil pipe are improved, and meanwhile the effect of saving water resources and energy consumption is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning floor heating system and a control method thereof. Background Art

[0002] The integrated air-conditioning floor heating system exchanges heat with the air outdoors through a refrigerant system, and then exchanges heat with water in a shell and tube heat exchanger or other types of heat exchangers. The high-temperature water is pumped indoors for heating.

[0003] The air-conditioning floor heating system has more floor heating terminal coils in the room and longer water system pipes. In winter, due to the low ambient temperature, when the unit is turned off or in standby mode, the water system pipes and indoor room heat exchangers may freeze. In this case, the integrated air-conditioning floor heating system will consider starting the water pump and the compressor to heat the system for antifreeze, and circulate the heating water system to prevent the water circuit from freezing and cracking, but this method causes a lot of water resources to be wasted. Many integrated air-conditioning floor heating systems do not have an automatic antifreeze function setting on the system. A drain valve is added at the low point of the water circuit, and the user is reminded through the manual to drain the water in the water system when it is not used for a long time. This method requires human intervention and is not intelligent. Some air-conditioning floor heating systems simply determine the water temperature. If it is lower than a certain temperature value, the electric auxiliary heating and compressor are started for heating. If it is higher than a certain temperature value, the electric auxiliary heating and compressor heating are exited. This method consumes more energy to maintain the water temperature and is not energy-saving enough.

[0004] With regard to the problem of water waste or high energy consumption in the anti-freezing method of air-conditioning floor heating system in related technologies, no effective solution has been proposed so far. Summary of the invention

[0005] The present invention provides an air-conditioning floor heating system and a control method thereof, so as to at least solve the problem of water waste or high energy consumption in the anti-freezing method of the air-conditioning floor heating system in the prior art.

[0006] To solve the above technical problems, according to one aspect of an embodiment of the present invention, an air-conditioning floor heating system is provided, comprising: a floor heating coil for heating the indoor room; an air-conditioning unit, comprising a compressor, an evaporator, a throttling device and a condenser connected in sequence, the condenser exchanges heat with the water inlet pipe of the floor heating coil to provide heat for the floor heating coil; a bypass pipeline, which is arranged in parallel with the condenser and is used to bypass part of the refrigerant discharged by the compressor; a hot water storage tank, the bypass pipeline passes through the hot water storage tank and is used to heat the water in the hot water storage tank, the water in the hot water storage tank exchanges heat with the water inlet pipe of the floor heating coil to heat the inlet water of the floor heating coil.

[0007] Furthermore, the water storage tank includes a water inlet pipe and a water outlet pipe, the water inlet pipe of the floor heating coil is a sleeve structure, the sleeve structure includes an inner tube located in the inner layer and an outer tube located in the outer layer, water after heat exchange with the condenser flows in the inner tube, the outer tube is connected to the water inlet pipe and the water outlet pipe of the water storage tank, and the water in the water storage tank flows in the outer tube.

[0008] Furthermore, it also includes: a heating device, located on the water inlet pipe of the floor heating coil, used to heat the inlet water of the floor heating coil; a water pump, located on the water inlet pipe of the floor heating coil, used to adjust the water flow of the inlet water of the floor heating coil.

[0009] Furthermore, the heat storage tank is also used to provide domestic hot water; the air-conditioning floor heating system also includes: an ambient temperature sensor, used to detect the indoor ambient temperature where the floor heating coil is located; an inlet water temperature sensor, arranged on the water inlet pipe of the floor heating coil, used to detect the inlet water temperature of the floor heating coil; the air-conditioning floor heating system is also used to perform anti-freezing protection based on the indoor ambient temperature and the inlet water temperature of the floor heating coil.

[0010] According to another aspect of an embodiment of the present invention, a method for controlling an air-conditioning floor heating system is provided, which is applied to an air-conditioning floor heating system as described above, and the method comprises: detecting whether it is necessary to turn on anti-freeze protection for the floor heating coil; when it is necessary to turn on anti-freeze protection, obtaining the indoor ambient temperature of the floor heating coil and the water inlet temperature of the floor heating coil; determining the protection level of anti-freeze protection according to the indoor ambient temperature and the water inlet temperature, and controlling the operation of the air-conditioning floor heating system according to the protection level of anti-freeze protection.

[0011] Furthermore, the detection of whether the floor heating coil needs to turn on anti-freeze protection includes: obtaining the indoor ambient temperature; determining whether the indoor ambient temperature is less than or equal to a preset anti-freeze temperature threshold; if so, determining that anti-freeze protection needs to be turned on, otherwise, determining that anti-freeze protection does not need to be turned on.

[0012] Furthermore, the protection level of anti-freeze protection is determined according to the indoor ambient temperature and the water inlet temperature, including: when the indoor ambient temperature is within a first preset temperature range, the protection level of anti-freeze protection is determined to be a first protection level range, and the protection level of anti-freeze protection is determined according to the water inlet temperature within the first protection level range; when the indoor ambient temperature is within a second preset temperature range, the protection level of anti-freeze protection is determined to be a second protection level range, and the protection level of anti-freeze protection is determined according to the water inlet temperature within the second protection level range; wherein, the first preset temperature range is greater than the second preset temperature range, and the first protection level range is greater than the second protection level range.

[0013] Further, the protection levels of the anti-freeze protection include at least: a first protection level, a second protection level and a third protection level, wherein the first protection level range includes the first protection level, the second protection level and the third protection level, and the second protection level range includes the second protection level and the third protection level; determining the protection level of the anti-freeze protection according to the water inlet temperature includes: when the water inlet temperature is within the first water inlet temperature range, determining the protection level of the anti-freeze protection to be the first protection level; when the water inlet temperature is within the second water inlet temperature range, determining the protection level of the anti-freeze protection to be the second protection level; when the water inlet temperature is within the third water inlet temperature range, determining the protection level of the anti-freeze protection to be the third protection level; wherein the first water inlet temperature range is greater than the second water inlet temperature range, and the second water inlet temperature range is greater than the third water inlet temperature range.

[0014] Furthermore, the operation of the air-conditioning floor heating system is controlled according to the protection level of the anti-freeze protection, including: when the protection level of the anti-freeze protection is the first protection level, controlling the water pump to turn on to increase the water flow rate of the water inlet to the floor heating coil; when the protection level of the anti-freeze protection is the second protection level, controlling the heating device to turn on to heat the water inlet to the floor heating coil; when the protection level of the anti-freeze protection is the third protection level, controlling the compressor of the air-conditioning unit to turn on, and after the water temperature in the heat storage tank reaches a preset temperature, exchanging heat with the water inlet pipe of the floor heating coil to heat the water inlet to the floor heating coil.

[0015] According to another aspect of the embodiments of the present invention, there is provided a storage medium containing computer executable instructions, wherein the computer executable instructions are used to execute the above-mentioned air conditioning floor heating system control method when executed by a computer processor.

[0016] In the present invention, an air-conditioning floor heating system is provided, which includes an air-conditioning unit for supplying heat to the floor heating coil, and the condenser of the air-conditioning unit exchanges heat with the water inlet pipe of the floor heating coil to supply heat to the floor heating coil. The air-conditioning floor heating system also includes a bypass pipeline, which is arranged in parallel with the condenser, bypasses part of the refrigerant discharged by the compressor, and the bypass pipeline passes through the hot water storage tank to heat the water in the hot water storage tank, and then the water in the hot water storage tank exchanges heat with the water inlet pipe of the floor heating coil to heat the water inlet of the floor heating coil. Through the cooperation of the above-mentioned air-conditioning unit, the bypass pipeline and the hot water storage tank, hot water can be stored in the hot water storage tank for heat exchange with the floor heating coil, avoiding the waste of water resources caused by releasing the water in the floor heating coil when the temperature is low, and using the heat dissipation of the condenser for heating, making full use of the heat of the refrigerant, providing hot water with stable temperature, avoiding the problem of high energy consumption of the anti-freezing method of the existing air-conditioning floor heating system, preventing the floor heating coil from damaging the pipeline due to the freezing and expansion of the internal water, improving the antifreeze property and operation stability of the floor heating coil, and achieving the effect of saving water resources and energy consumption at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an optional structural schematic diagram of an air-conditioning floor heating system according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of an optional structure of a water inlet pipe of a floor heating coil according to an embodiment of the present invention;

[0019] Figure 3 is an optional flow chart of a method for controlling an air-conditioning floor heating system according to an embodiment of the present invention;

[0020] Figure 4 It is another optional flow chart of the air-conditioning floor heating system control method according to an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Compressor; 2. Evaporator; 3. Throttling device; 4. Condenser; 5. Bypass pipeline; 6. Heat storage tank; 7. Four-way valve; 8. Floor heating coil; 9. Heating device; 10. Water pump; 11. Water pump switch; 12. Expansion tank; 13. Gas-liquid separator; 14. Subcooler; 15. Oil separator; 16. Oil return solenoid valve; 17. Oil return capillary; 18. Filter; 19. High pressure sensor; 20. Low pressure sensor; 21. Inner tube; 22. Outer tube. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0025] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0026] It should be understood that although the terms first, second, third, etc. may be used to describe controllers in embodiments of the present invention, these controllers should not be limited to these terms. These terms are only used to distinguish controllers connected to different devices. For example, without departing from the scope of embodiments of the present invention, a first controller may also be referred to as a second controller, and similarly, a second controller may also be referred to as a first controller.

[0027] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0028] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0029] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] In a preferred embodiment 1 of the present invention, an air-conditioning floor heating system is provided. Specifically, Figure 1 An optional structural diagram of the air-conditioning floor heating system is shown in FIG. Figure 1 As shown, the air conditioning floor heating system includes:

[0032] The floor heating coil 8 is used to heat the room. Water flows through the floor heating coil 8 as a heat exchange medium, which is not only low in cost but also pollution-free. In addition, other media can be used as heat exchange media, such as antifreeze. As long as it is a liquid medium, the system of the present invention can be used. The following description will be made with water as the heat exchange medium.

[0033] The air conditioning unit comprises a compressor 1, an evaporator 2, a throttling device 3 and a condenser 4 which are connected in sequence. The condenser 4 exchanges heat with a water inlet pipe of a floor heating coil 8 to provide heat for the floor heating coil 8. The air conditioning unit can be used to provide heat for users. When floor heating is needed, it can be used for floor heating, which expands the use range of the air conditioning unit. The waste heat of the condenser 4 is used to heat the floor heating, thereby improving the utilization rate of energy and the heat exchange efficiency of the air conditioning unit. In addition, Figure 1 As shown, the air conditioning unit further includes: a gas-liquid separator 13, a subcooler 14, an oil separator 15, an oil return solenoid valve 16, an oil return capillary 17 and a filter 18. In addition, a high pressure sensor 19 and a low pressure sensor 20 are provided for detecting the system pressure to control the operation of the air conditioning unit;

[0034] The bypass line 5 is arranged in parallel with the condenser 4 and is used to bypass part of the refrigerant discharged from the compressor 1; Figure 1 As shown, one end of the bypass line 5 is connected to the four-way valve 7, and the other end is connected to the throttling device 3. Other connection point settings can also be used to achieve heating using the heat of the high-temperature refrigerant discharged from the compressor 1;

[0035] The water storage tank 6 and the bypass pipe 5 pass through the water storage tank 6 and are used to heat the water in the water storage tank 6. The water in the water storage tank 6 exchanges heat with the water inlet pipe of the floor heating coil 8 to heat the water inlet of the floor heating coil 8. The water storage tank 6 is also used to provide domestic hot water, which expands the use of the water storage tank 6 and improves the economic benefits of the whole system.

[0036] In the above embodiment, an air-conditioning floor heating system is provided, which includes an air-conditioning unit for supplying heat to the floor heating coil, and the condenser of the air-conditioning unit exchanges heat with the water inlet pipe of the floor heating coil to supply heat to the floor heating coil. The air-conditioning floor heating system also includes a bypass pipeline, which is arranged in parallel with the condenser, bypasses part of the refrigerant discharged by the compressor, and the bypass pipeline passes through the hot water storage tank to heat the water in the hot water storage tank, and then the water in the hot water storage tank exchanges heat with the water inlet pipe of the floor heating coil to heat the water inlet of the floor heating coil. Through the cooperation of the above air-conditioning unit, the bypass pipeline and the hot water storage tank, hot water can be stored in the hot water storage tank for heat exchange with the floor heating coil, avoiding the waste of water resources caused by releasing the water in the floor heating coil when the temperature is low, and using the heat dissipation of the condenser for heating, making full use of the heat of the refrigerant, providing hot water with stable temperature, avoiding the problem of high energy consumption of the anti-freezing method of the existing air-conditioning floor heating system, preventing the floor heating coil from damaging the pipeline due to the freezing and expansion of the internal water, improving the antifreeze property and operation stability of the floor heating coil, and achieving the effect of saving water resources and energy consumption at the same time.

[0037] like Figure 1 As shown, the hot water storage tank 6 includes a water inlet pipe and a water outlet pipe. A heat exchanger can also be arranged in the hot water storage tank 6. The bypass pipe 5 is connected to the water pipe in the hot water storage tank 6 in the heat exchanger. One end of the water pipe in the hot water storage tank 6 is connected to the water outlet pipe, and the water outlet pipe enters the floor heating coil 8. The water outlet pipe is also provided with a solenoid valve for controlling the switch and water flow of the water outlet pipe.

[0038] Figure 2 The schematic diagram of an optional structure of the water inlet pipe of the floor heating coil is shown. The water inlet pipe of the floor heating coil 8 is a sleeve structure, which includes an inner pipe 21 located in the inner layer and an outer pipe 22 located in the outer layer. Water after heat exchange with the condenser 4 flows in the inner pipe, and the outer pipe is connected to the water inlet pipe and the water outlet pipe of the hot water storage tank 6. The water in the water tank is stored in the floor heating module for heat exchange. The hot water produced is injected into the antifreeze sleeve when the antifreeze protection of the floor heating module is turned on to prevent the floor heating coil 8 from damaging the pipeline due to the freezing and expansion of the internal water when the temperature is low in winter.

[0039] In addition, the air-conditioning floor heating system also includes: a heating device 9, located on the water inlet pipe of the floor heating coil 8, for heating the water inlet of the floor heating coil 8; a water pump 10, located on the water inlet pipe of the floor heating coil 8, for adjusting the water flow of the water inlet of the floor heating coil 8. The water pump 10 is provided with a water pump switch 11 to adjust the water flow of the water inlet, avoid a large amount of water accumulation in the pipeline, thereby protecting the unit from breaking the pipe wall due to freezing of a large amount of water accumulation, and at the same time, the heat exchange is faster when the water flow is large, thereby improving the heating effect of the floor heating coil 8. At the same time, an expansion tank 12 can also be provided to buffer the pressure in the pipeline. The heating device 9 can be an electric heating device 9 or other heating devices 9, which are used to heat the water inlet of the floor heating coil 8 to increase the water inlet temperature and avoid the water temperature of the floor heating coil being too low in a low temperature environment. The above-mentioned water pump 10, heating device 9 and air conditioning unit belong to a variety of anti-freezing protection measures, which can be gradually turned on according to demand to achieve multiple anti-freezing protection.

[0040] The air-conditioned floor heating system also includes: an ambient temperature sensor for detecting the indoor ambient temperature where the floor heating coil is located; a water inlet temperature sensor, which is arranged on the water inlet pipe of the floor heating coil and is used to detect the water inlet temperature of the floor heating coil; the air-conditioned floor heating system is also used to perform anti-freezing protection based on the indoor ambient temperature and the water inlet temperature of the floor heating coil.

[0041] The multiple antifreeze designs adopted by the present invention can completely solve the antifreeze problem of the water system of the air-conditioning and floor heating integrated unit when it is in standby, shutdown or fault state in a low temperature environment, thereby ensuring the reliability of the unit and increasing the service life of the unit.

[0042] Example 2

[0043] In a preferred embodiment 2 of the present invention, a control method for an air-conditioning floor heating system is provided, which is applied to the air-conditioning floor heating system in the above embodiment 1. Specifically, Figure 3 An optional flow chart of the method is shown as follows: Figure 3 As shown, the method includes the following steps S302-S306:

[0044] S302: Detect whether the floor heating coil needs to be protected against freezing;

[0045] S304: When anti-freezing protection needs to be turned on, obtaining the indoor ambient temperature where the floor heating coil is located and the water inlet temperature of the floor heating coil;

[0046] S306: Determine the protection level of the anti-freezing protection according to the indoor ambient temperature and the water inlet temperature, and control the operation of the air-conditioning floor heating system according to the protection level of the anti-freezing protection.

[0047] In the above embodiment, an air-conditioning floor heating system is provided, which includes an air-conditioning unit for supplying heat to the floor heating coil, and the condenser of the air-conditioning unit exchanges heat with the water inlet pipe of the floor heating coil to supply heat to the floor heating coil. The air-conditioning floor heating system also includes a bypass pipeline, which is arranged in parallel with the condenser, bypasses part of the refrigerant discharged by the compressor, and the bypass pipeline passes through the hot water storage tank to heat the water in the hot water storage tank, and then the water in the hot water storage tank exchanges heat with the water inlet pipe of the floor heating coil to heat the water inlet of the floor heating coil. Through the cooperation of the above air-conditioning unit, the bypass pipeline and the hot water storage tank, hot water can be stored in the hot water storage tank for heat exchange with the floor heating coil, avoiding the waste of water resources caused by releasing the water in the floor heating coil when the temperature is low, and using the heat dissipation of the condenser for heating, making full use of the heat of the refrigerant, providing hot water with stable temperature, avoiding the problem of high energy consumption of the anti-freezing method of the existing air-conditioning floor heating system, preventing the floor heating coil from damaging the pipeline due to the freezing and expansion of the internal water, improving the antifreeze property and operation stability of the floor heating coil, and achieving the effect of saving water resources and energy consumption at the same time.

[0048] In a preferred embodiment of the present invention, detecting whether the floor heating coil needs to turn on the anti-freeze protection includes: obtaining the indoor ambient temperature; determining whether the indoor ambient temperature is less than or equal to a preset anti-freeze temperature threshold; if so, determining that the anti-freeze protection needs to be turned on, otherwise, determining that the anti-freeze protection does not need to be turned on. If the indoor ambient temperature is less than or equal to the preset anti-freeze temperature threshold, it means that the indoor ambient temperature is low, and the anti-freeze protection is turned on in time to avoid the freezing and expansion of water in the floor heating coil and cause damage to the pipeline.

[0049] After determining that the anti-freeze protection needs to be turned on, the protection level of the anti-freeze protection is determined according to the indoor ambient temperature and the water inlet temperature, including: when the indoor ambient temperature is within the first preset temperature range, the protection level of the anti-freeze protection is determined to be within the first protection level range, and the protection level of the anti-freeze protection is determined according to the water inlet temperature within the first protection level range; when the indoor ambient temperature is within the second preset temperature range, the protection level of the anti-freeze protection is determined to be within the second protection level range, and the protection level of the anti-freeze protection is determined according to the water inlet temperature within the second protection level range; wherein the first preset temperature range is greater than the second preset temperature range, and the first protection level range is greater than the second protection level range. Since the air-conditioning floor heating system in the present invention is provided with multiple anti-freeze protection devices, multiple anti-freeze protection levels can be set, and different levels have corresponding anti-freeze protection effects, thereby achieving different protection effects at different ambient temperatures, adapting to the ambient temperature, not only having a higher degree of intelligence, but also achieving energy saving and avoiding unnecessary waste of resources.

[0050] Among them, the protection levels of anti-freeze protection include at least: a first protection level, a second protection level and a third protection level, wherein the first protection level range includes the first protection level, the second protection level and the third protection level, and the second protection level range includes the second protection level and the third protection level; since the first preset temperature range is greater than the second preset temperature range, when in the second preset temperature range, that is, when the ambient temperature is lower, a higher level of anti-freeze protection is directly executed, and the control is more precise.

[0051] Specifically, the protection level of the anti-freezing protection is determined according to the water inlet temperature, including: when the water inlet temperature is within the first water inlet temperature range, the protection level of the anti-freezing protection is determined to be the first protection level; when the water inlet temperature is within the second water inlet temperature range, the protection level of the anti-freezing protection is determined to be the second protection level; when the water inlet temperature is within the third water inlet temperature range, the protection level of the anti-freezing protection is determined to be the third protection level; wherein the first water inlet temperature range is greater than the second water inlet temperature range, and the second water inlet temperature range is greater than the third water inlet temperature range. That is, within each protection level range, the specific anti-freezing protection level is determined by the water inlet temperature, and the water inlet temperature can more directly describe the state of the floor heating coil, so determining the specific anti-freezing protection level according to the water inlet temperature can improve the accuracy of control.

[0052] After determining the protection level, the operation of the air conditioning and floor heating system is controlled according to the protection level of the anti-freeze protection, including: when the protection level of the anti-freeze protection is the first protection level, the water pump is controlled to start, and the water flow of the water entering the floor heating coil is increased; when the protection level of the anti-freeze protection is the second protection level, the heating device is controlled to start, and the water entering the floor heating coil is heated; when the protection level of the anti-freeze protection is the third protection level, the compressor of the air conditioning unit is controlled to start, and after the water temperature in the hot water tank reaches the preset temperature, heat is exchanged with the water inlet pipe of the floor heating coil to heat the water entering the floor heating coil. The higher the anti-freeze protection level, the better the heating effect is. Therefore, the protection level can also be set in other forms as needed. For example, the higher the protection level, the more devices are turned on, so as to improve the heating effect as soon as possible and avoid freezing.

[0053] Another preferred embodiment 2 of the present invention provides another air conditioning floor heating system control method. Specifically, Figure 4 An optional flow chart of the method is shown as follows: Figure 4 As shown, the method includes the following steps S401-S419:

[0054] S401: Start;

[0055] S402: Detecting ambient temperature;

[0056] S403: Detect the water temperature; after determining that the floor heating is in the standby / off state, obtain the ambient temperature and the water inlet temperature of the floor heating module;

[0057] S404: Is the ambient temperature ≤ T0? If yes, proceed to step S406; otherwise, proceed to step S405;

[0058] S405: Antifreeze protection is not enabled;

[0059] S406: Turn on antifreeze protection;

[0060] S407: Is T1≤ambient temperature≤T0 established? If so, proceed to step S408, otherwise proceed to step S411; when it is determined that the ambient temperature is less than the preset antifreeze ambient temperature T0, the system determines to enter the antifreeze protection program;

[0061] S408: Start the first level antifreeze protection;

[0062] S409: Is T2<inlet water temperature≤T3 established? If so, proceed to step S410; otherwise, proceed to step S412;

[0063] S410: The water pump is turned on to increase the water volume; when the ambient temperature is greater than the preset antifreeze ambient temperature T1 and the floor heating water inlet temperature is less than T3, the water pump is turned on to increase the flow rate to prevent freezing as the first level of antifreeze protection. By increasing the water flow rate in the pipeline, a large amount of water accumulation in the pipeline is avoided, thereby protecting the unit from breaking the pipe wall due to freezing of a large amount of water accumulation;

[0064] S411: Is the ambient temperature ≤ T1? If so, proceed to step S412;

[0065] S412: Is T3<inlet water temperature≤T4 established? If yes, proceed to step S413; otherwise, proceed to step S415;

[0066] S413: start the second level antifreeze protection;

[0067] S414: Turn on the electric heating belt; when the water inlet temperature is less than T4, turn on the electric heating belt wrapped around the water inlet circuit as the second level of antifreeze protection, and prevent the waterway from freezing by heating the water inlet section;

[0068] S415: Is T4<inlet water temperature≤T5 established? If so, proceed to step S416;

[0069] S416: start the third level antifreeze protection;

[0070] S417: The compressor is in heating operation, and the hot water tank control valve is opened; when the inlet water temperature is less than T4, the compressor is turned on to enter the heating operation, and the hot water tank control valve is opened after the water temperature in the water tank reaches a certain level. At this time, the heating effect of the electric heating device on the pipeline is not enough to offset the impact of a large amount of low-temperature water entering the system on the pipeline. By adding hot water to the antifreeze sleeve of the water inlet circuit as the third level of antifreeze protection, the pipeline is further protected from freezing;

[0071] S418: After running for 5 minutes, check whether the inlet and outlet water temperatures are ≥15°C. If yes, proceed to step S419, otherwise proceed to step S402;

[0072] S419: Exit antifreeze operation.

[0073] Among them, T0: the preset ambient temperature judgment value for starting the first, second and third level antifreeze protection, ranging from 0 to 10°C, preferably 0°C;

[0074] T1: The preset ambient temperature judgment value for starting the second and third level antifreeze protection is -10 to 0°C, preferably -7°C;

[0075] T2: The preset water temperature judgment value for starting the water pump for the first level antifreeze protection is 7-10°C, preferably 8°C;

[0076] T3: The preset water temperature judgment value of the second-level antifreeze protection starting heating device is 5-8℃, preferably 6℃;

[0077] T4: The preset water temperature judgment value of the second-level antifreeze protection starting heating device is 4-6℃, preferably 4℃;

[0078] T5: The preset water temperature judgment value for starting the compressor and the hot water tank control valve for the third-level antifreeze protection is 0 to 4°C, preferably 3°C.

[0079] The three-level antifreeze design adopted by the present invention can completely solve the anti-freezing problem of the water system of the air-conditioning and floor heating integrated unit when it is in standby, shutdown or fault state in a low temperature environment, thereby ensuring the reliability of the unit and increasing the service life of the unit.

[0080] Example 3

[0081] Based on the air conditioning and floor heating system control method provided in the above-mentioned embodiment 2, a storage medium containing computer executable instructions is also provided in a preferred embodiment 3 of the present invention. When the computer executable instructions are executed by a computer processor, they are used to execute the air conditioning and floor heating system control method as described above.

[0082] In the above embodiment, an air-conditioning floor heating system is provided, which includes an air-conditioning unit for supplying heat to the floor heating coil, and the condenser of the air-conditioning unit exchanges heat with the water inlet pipe of the floor heating coil to supply heat to the floor heating coil. The air-conditioning floor heating system also includes a bypass pipeline, which is arranged in parallel with the condenser, bypasses part of the refrigerant discharged by the compressor, and the bypass pipeline passes through the hot water storage tank to heat the water in the hot water storage tank, and then the water in the hot water storage tank exchanges heat with the water inlet pipe of the floor heating coil to heat the water inlet of the floor heating coil. Through the cooperation of the above air-conditioning unit, the bypass pipeline and the hot water storage tank, hot water can be stored in the hot water storage tank for heat exchange with the floor heating coil, avoiding the waste of water resources caused by releasing the water in the floor heating coil when the temperature is low, and using the heat dissipation of the condenser for heating, making full use of the heat of the refrigerant, providing hot water with stable temperature, avoiding the problem of high energy consumption of the anti-freezing method of the existing air-conditioning floor heating system, preventing the floor heating coil from damaging the pipeline due to the freezing and expansion of the internal water, improving the antifreeze property and operation stability of the floor heating coil, and achieving the effect of saving water resources and energy consumption at the same time.

[0083] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0084] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0086] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0087] In addition, each functional unit in each embodiment of the present invention 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. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0088] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0089] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not invented by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0090] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An air-conditioning floor heating system, characterized in that: include: Floor heating coils, used to heat the interior; An air conditioning unit, comprising a compressor, an evaporator, a throttling device and a condenser connected in sequence, wherein the condenser exchanges heat with a water inlet pipe of the floor heating coil to provide heat for the floor heating coil; A bypass pipeline is arranged in parallel with the condenser and is used to bypass part of the refrigerant discharged from the compressor; A heat storage tank, wherein the bypass pipeline passes through the heat storage tank and is used to heat the water in the heat storage tank. The water in the heat storage tank exchanges heat with the water inlet pipe of the floor heating coil to heat the water inlet of the floor heating coil.

2. The air-conditioning floor heating system according to claim 1, characterized in that: The water storage tank includes a water inlet pipe and a water outlet pipe. The water inlet pipe of the floor heating coil is a sleeve structure. The sleeve structure includes an inner tube located in the inner layer and an outer tube located in the outer layer. Water that has exchanged heat with the condenser flows in the inner tube. The outer tube is connected to the water inlet pipe and the water outlet pipe of the water storage tank, and the water in the water storage tank flows in the outer tube.

3. The air-conditioning floor heating system according to claim 1, characterized in that: Also includes: A heating device, located on the water inlet pipe of the floor heating coil, used for heating the water inlet of the floor heating coil; A water pump is located on the water inlet pipe of the floor heating coil and is used to adjust the water flow of the water inlet of the floor heating coil.

4. The air-conditioning floor heating system according to claim 1, characterized in that: The water storage tank is also used to provide domestic hot water; the air conditioning floor heating system also includes: An ambient temperature sensor, used to detect the indoor ambient temperature where the floor heating coil is located; An inlet water temperature sensor is arranged on the water inlet pipe of the floor heating coil and is used to detect the inlet water temperature of the floor heating coil; The air-conditioning floor heating system is also used to perform anti-freezing protection according to the indoor ambient temperature and the water inlet temperature of the floor heating coil.

5. A control method for an air-conditioning floor heating system, applied to the air-conditioning floor heating system according to any one of claims 1 to 4, characterized in that: The method comprises: Check whether the floor heating coil needs to be protected against freezing; When anti-freezing protection needs to be turned on, obtaining the indoor ambient temperature of the floor heating coil and the water inlet temperature of the floor heating coil; The protection level of anti-freezing protection is determined according to the indoor environment temperature and the water inlet temperature, and the operation of the air-conditioning floor heating system is controlled according to the protection level of anti-freezing protection.

6. The method according to claim 5, characterized in that The detecting whether the floor heating coil needs to start anti-freeze protection includes: Acquiring the indoor ambient temperature; Determining whether the indoor ambient temperature is less than or equal to a preset anti-freezing temperature threshold; If yes, it is determined that the anti-freeze protection needs to be turned on; otherwise, it is determined that the anti-freeze protection does not need to be turned on.

7. The method according to claim 5, characterized in that Determining the protection level of anti-freezing protection according to the indoor ambient temperature and the water inlet temperature includes: When the indoor ambient temperature is within a first preset temperature range, determining the protection level of the anti-freezing protection to be within a first protection level range, and determining the protection level of the anti-freezing protection according to the water inlet temperature within the first protection level range; When the indoor ambient temperature is within a second preset temperature range, the protection level of the anti-freeze protection is determined to be within a second protection level range, and the protection level of the anti-freeze protection is determined according to the water inlet temperature within the second protection level range; wherein, the first preset temperature range is greater than the second preset temperature range, and the first protection level range is greater than the second protection level range.

8. The method according to claim 7, characterized in that The protection level of the anti-freezing protection includes at least: a first protection level, a second protection level and a third protection level, wherein the first protection level range includes the first protection level, the second protection level and the third protection level, and the second protection level range includes the second protection level and the third protection level; determining the protection level of the anti-freezing protection according to the water inlet temperature includes: When the water inlet temperature is within a first water inlet temperature range, determining the protection level of the anti-freezing protection to be a first protection level; When the water inlet temperature is within the second water inlet temperature range, determining the protection level of the anti-freezing protection to be the second protection level; When the water inlet temperature is within a third water inlet temperature range, the protection level of the anti-freezing protection is determined to be a third protection level; wherein the first water inlet temperature range is greater than the second water inlet temperature range, and the second water inlet temperature range is greater than the third water inlet temperature range.

9. The method according to claim 8, characterized in that Controlling the operation of the air conditioning and floor heating system according to the protection level of the anti-freezing protection includes: When the protection level of the anti-freezing protection is the first protection level, controlling the water pump to start, and increasing the water flow rate of the water inlet of the floor heating coil; When the protection level of the anti-freezing protection is the second protection level, controlling the heating device to turn on to heat the water inlet of the floor heating coil; When the protection level of the anti-freeze protection is the third protection level, the compressor of the air-conditioning unit is controlled to start, and after the water temperature in the heat storage tank reaches a preset temperature, heat is exchanged with the water inlet pipe of the floor heating coil to heat the inlet water of the floor heating coil.

10. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to execute the air conditioning and floor heating system control method according to any one of claims 5 to 9 when executed by a computer processor.

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