An air conditioning water system and its control method

Abstract

This invention discloses an air conditioning water system and its control method. The air conditioning water system includes: an air conditioning unit, a buffer water tank, underfloor heating coils, a radiator, and a fan coil unit. A primary variable frequency circulating water pump and a first three-way valve are installed between the air conditioning unit and the buffer water tank. One branch of the first three-way valve is connected to a second three-way valve between the first three-way valve and the fan coil unit; the other branch of the first three-way valve is connected to the radiator. A secondary circulating water pump delivers water from the buffer water tank to the underfloor heating coils. The secondary circulating water pump also delivers water from the buffer water tank to the fan coil unit via the second three-way valve. This invention proposes a control scheme based on energy adaptation and adjustment for the air conditioning secondary circulating water system. By controlling the water pump and the three-way valve, the air conditioning water system can reach the target water temperature more quickly. Simultaneously, by reducing the temperature difference in the stored water, energy consumption is reduced, thereby improving the unit's capacity and energy efficiency, increasing energy utilization efficiency, achieving rapid heating and cooling of the space, and improving user comfort.

Description

Technical Field

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

[0002] Most existing air conditioning water systems in China are either primary pump systems or secondary circulating water systems. These two systems have different advantages. Primary pump systems can quickly and directly bring the system to the required temperature, but for high-load conditions requiring large amounts of circulating water, they suffer from large temperature and operational fluctuations, easily leading to frequent unit start-ups and shutdowns. Secondary circulating water systems can solve these problems, but due to the presence of a circulating water tank, the temperature of the entire circulating water tank needs to be increased when high water temperatures are required, resulting in energy waste.

[0003] There is currently no effective solution to the problem of low energy efficiency in existing secondary circulating water systems. Summary of the Invention

[0004] This invention provides an air conditioning water system and its control method to solve the problem of low energy efficiency in existing secondary circulating water systems.

[0005] To solve the above-mentioned technical problems, the present invention provides an air conditioning water system, wherein the air conditioning water system includes: an air conditioning unit, a buffer water tank, underfloor heating coils, a radiator, and a fan coil unit; wherein a primary variable frequency circulating water pump and a first three-way valve are provided between the air conditioning unit and the buffer water tank, and a second three-way valve is provided between one branch of the first three-way valve and the fan coil unit; the other branch of the first three-way valve is connected to the radiator; a secondary circulating water pump delivers water from the buffer water tank to the underfloor heating coils; the secondary circulating water pump delivers water from the buffer water tank to the fan coil unit through the second three-way valve.

[0006] Furthermore, the air conditioning water system also includes: a mixing valve, which is located at the inlet of the underfloor heating coil and is also connected to the return outlet of the underfloor heating coil, for precise water temperature control; an underfloor heating circulation pump, for stabilizing water flow; and a check valve, which is located at the outlet of the underfloor heating coil, to prevent backflow of water.

[0007] The present invention also provides a control method for an air conditioning water system, wherein the method includes: after the air conditioning unit is turned on for heating, controlling the first three-way valve to open, so that the hot water from the air conditioning unit is delivered to the underfloor heating coil and the fan coil unit; after detecting that the water temperature in the buffer water tank reaches a first preset temperature T1, the second three-way valve opens the pipeline between the underfloor heating coil and the fan coil unit; after detecting that the water temperature in the buffer water tank reaches a second preset temperature T2, controlling the first three-way valve to switch, so that the hot water from the air conditioning unit is directly delivered to the radiator and returned to the buffer water tank.

[0008] Furthermore, after the air conditioning unit starts heating, the first three-way valve is opened, and the hot water from the air conditioning unit is delivered to the underfloor heating coil and the fan coil unit. This includes: controlling the first three-way valve to open, and the hot water from the air conditioning unit is delivered to the underfloor heating coil and the fan coil unit via a primary variable frequency circulating water pump, the first three-way valve, a buffer water tank, and a secondary circulating water pump; controlling the buffer water tank to heat, and controlling the second three-way valve to open the pipeline between the first three-way valve and the fan coil unit, and the hot water from the air conditioning unit is delivered to the fan coil unit via a primary variable frequency circulating water pump, the first three-way valve, and the second three-way valve; the hot water from the air conditioning unit is delivered to the underfloor heating coil via a primary variable frequency circulating water pump, the first three-way valve, the buffer water tank, and the secondary circulating water pump; wherein, the secondary circulating water pump operates at a preset medium frequency.

[0009] Furthermore, after detecting that the water temperature in the buffer tank reaches the first preset temperature T1, the second three-way valve opens the pipeline between the underfloor heating coil and the fan coil unit, including: controlling the second three-way valve to open the pipeline between the underfloor heating coil and the fan coil unit so that the hot water in the buffer tank is transported to the underfloor heating coil and the fan coil unit through the secondary circulation water pump; wherein, the secondary circulation water pump operates at a preset high frequency.

[0010] This invention also provides a control method based on an air conditioning water system, wherein the method includes: after the air conditioning unit is turned on for cooling, controlling the first three-way valve to open, so that the chilled water from the air conditioning unit is delivered to the underfloor heating coil and the fan coil unit; after detecting that the chilled water temperature in the buffer water tank reaches a third preset temperature T3, controlling the first three-way valve to switch direction, and controlling the second three-way valve to open the pipeline between the first three-way valve and the fan coil unit, so that the chilled water from the air conditioning unit is directly delivered to the fan coil unit, and the chilled water from the buffer water tank is delivered to the underfloor heating coil unit, so as to achieve that the cooling temperature of the fan coil unit is lower than that of the underfloor heating coil unit.

[0011] Furthermore, after the air conditioning unit starts cooling, the first three-way valve is opened, and the chilled water from the air conditioning unit is delivered to the underfloor heating coil and the fan coil unit. This includes: opening the pipeline between the primary variable frequency circulating water pump and the secondary circulating water pump by the first three-way valve, and delivering the chilled water from the air conditioning unit to the buffer water tank; and opening the pipeline between the first three-way valve and the fan coil unit by the second three-way valve.

[0012] Furthermore, the method also includes: the two-way valve of the radiator is always in a closed state.

[0013] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method as described above.

[0014] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method as described above.

[0015] Applying the technical solution of this invention, a control scheme based on energy adaptation and adjustment is proposed for the secondary circulating water system of an air conditioner. By controlling the water pump and the three-way valve, the air conditioning water system can reach the target water temperature more quickly. At the same time, by reducing the water temperature difference in the buffer tank, the energy consumption is reduced, thereby improving the unit's capacity and energy efficiency, improving energy use efficiency, achieving rapid heating and cooling of the space, and improving user comfort. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a secondary circulating water system according to an embodiment of the present invention; Figure 2 This is a preferred structural diagram of a secondary circulating water system according to an embodiment of the present invention; Figure 3 This is a flowchart of a heating control method for an air conditioning water system according to an embodiment of the present invention; Figure 4 This is a flowchart of the rapid heating control of a secondary circulating water system according to an embodiment of the present invention; Figure 5 This is a flowchart of a cooling control method for an air conditioning water system according to an embodiment of the present invention; Figure 6 This is a flowchart of the rapid cooling control process for a secondary circulating water system according to an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0018] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0019] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0020] It should be understood that although the terms first, second, third, etc., may be used to describe three-way valves in the embodiments of the present invention, these three-way valves should not be limited to these terms. These terms are only used to distinguish three-way valves. For example, without departing from the scope of the embodiments of the present invention, a first three-way valve may also be referred to as a second three-way valve, and similarly, a second three-way valve may also be referred to as a first three-way valve.

[0021] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0022] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0023] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] Example 1 Figure 1 This is a schematic diagram of the structure of a secondary circulating water system according to an embodiment of the present invention, as shown below. Figure 1 As shown, the air conditioning water system includes: an air conditioning unit 1, a buffer water tank 4, a floor heating coil 7, a radiator 8, and a fan coil unit 9; wherein, a primary variable frequency circulating water pump 2 and a first three-way valve 3 are installed between the air conditioning unit 1 and the buffer water tank 4, and a second three-way valve 6 is installed between one branch of the first three-way valve 3 and the fan coil unit 9; the other branch of the first three-way valve 3 is connected to the radiator 8; the secondary circulating water pump 5 transports water from the buffer water tank 4 to the floor heating coil 7; the secondary circulating water pump 5 transports water from the buffer water tank 4 to the fan coil unit 9 through the second three-way valve 6.

[0025] In practical applications, the air conditioning unit 1 generates hot water by the work of the compressor, and then delivers it to the buffer water tank 4 through the first three-way valve 3 via the variable frequency circulating water pump 2, or to the fan coil unit 9 / 9b or the underfloor heating coil 7 / 7b via the second three-way valve 6.

[0026] It should be noted that when no heating command is received, radiator 8 / 8b does not open, and at this time, the second three-way valve 6 connects the air conditioning unit and fan coil unit 9 / 9b. Upon receiving a heating command, radiator 8 / 8b opens (specifically, the radiator's two-way valve opens), and the second three-way valve 6 connects the secondary circulating water pump 5 and fan coil unit 9 / 9b, enabling the air conditioning unit to directly supply heat to radiator 8 / 8b. Underfloor heating coil 7 / 7b and fan coil unit 9 / 9b achieve medium-temperature heating through the secondary circulating water pump 5.

[0027] The secondary circulating water pump 5 delivers water from the buffer water tank 4 to the underfloor heating coil 7 / 7b, or via the second three-way valve 6 to the fan coil unit 9 / 9b. All return water from the terminal loads flows to the buffer water tank.

[0028] This embodiment aims to solve the problem of large overall water circuit load and difficulty in achieving rapid heating and cooling at multiple terminals caused by the use of a buffer tank in a secondary circulation pump system, without introducing additional heat / cold sources, through a specific water system design. For cases requiring lower underfloor heating temperatures, or for cases requiring higher underfloor cooling temperatures, precise temperature control can be further achieved by using a mixing valve 10 in conjunction with the underfloor heating circulation pump 11. Figure 2 The schematic diagram shown is a preferred structure of the secondary circulating water system according to an embodiment of the present invention. A mixing valve 10 is located at the inlet of the underfloor heating coil 7. The mixing temperature is set to the floor preheating (cold) temperature and floor heating (cold) temperature depending on the overall system mode. The mixing valve 10 is also connected to the return outlet of the underfloor heating coil 7 to achieve precise and stable water temperature control. To ensure stable and precise mixing, an underfloor heating circulation pump 11 is provided to stabilize the water flow. To prevent backflow under special circumstances, a check valve 12 is added to the outlet of the underfloor heating coil 7 to ensure accurate water temperature control.

[0029] Example 2 According to an embodiment of the present invention, a method embodiment for controlling an air conditioning water system is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0030] Figure 3 This is a flowchart of a heating control method for an air conditioning water system according to an embodiment of the present invention, such as... Figure 3 As shown, the method includes the following steps: Step S301: After the air conditioning unit is turned on for heating, the first three-way valve is opened, and the hot water from the air conditioning unit is delivered to the floor heating coil and the fan coil unit.

[0031] This step prepares the unit for operation, preheating the floor. During this time, the fan coil units are not running to prevent cold air from blowing out. Typically, the inlet water temperature starts above the dew point and operates until approximately 35°C (this temperature value is for illustrative purposes only). In practice, the first three-way valve is opened, and hot water from the air conditioning unit is delivered to the underfloor heating coils and fan coil units via a primary variable frequency circulating water pump, the first three-way valve, a buffer tank, and a secondary circulating water pump. Then, the buffer tank is heated, and the second three-way valve is opened to connect the pipes between the first three-way valve and the fan coil units. Hot water from the air conditioning unit is then delivered to the fan coil units via the primary variable frequency circulating water pump, the first three-way valve, and the second three-way valve. Hot water from the air conditioning unit is also delivered to the underfloor heating coils via the primary variable frequency circulating water pump, the first three-way valve, the buffer tank, and the secondary circulating water pump. The secondary circulating water pump operates at a preset medium frequency.

[0032] In step S302, after the water temperature in the buffer tank is detected to reach the first preset temperature T1, the second three-way valve opens the pipeline between the underfloor heating coil and the fan coil unit.

[0033] This step is used to ensure that when the water temperature in the buffer tank rises to T1 (e.g., 35℃), the fan coil unit and the underfloor heating system simultaneously start operating for two-dimensional heating. Specifically, the second three-way valve is controlled to open the piping between the underfloor heating coil and the fan coil unit, allowing the hot water from the buffer tank to be transported to both via a secondary circulation pump. The secondary circulation pump operates at a preset high frequency.

[0034] In step S303, after detecting that the water temperature in the buffer tank reaches the second preset temperature T2, the first three-way valve is switched, and the hot water from the air conditioning unit is directly delivered to the radiator and returned to the buffer tank.

[0035] This step is used to enable the air conditioning unit to directly deliver the radiator with the 41°C return water through the high temperature difference (about 55°C) after the water tank temperature continues to rise to T2 (e.g., 41°C). Then the return water returns to the buffer water tank, thus quickly achieving three-dimensional heating without separately heating the buffer water tank to 55°C.

[0036] This embodiment proposes a heating control scheme based on energy adaptation and adjustment for the secondary circulating water system of an air conditioner. By controlling the water pump and three-way valve, the air conditioning water system can reach the target water temperature more quickly. At the same time, by reducing the temperature difference of the stored water, the energy consumption is reduced, thereby improving the unit's capacity and energy efficiency, improving energy use efficiency, achieving rapid heating and cooling of the space, and improving user comfort.

[0037] Figure 4This is a flowchart of the rapid heating control of a secondary circulating water system according to an embodiment of the present invention, such as... Figure 4 As shown, the rapid heating control process of the secondary circulating water system in this embodiment is as follows: Step 1: After receiving a heating demand, the air conditioning unit 1 starts heating. After a normal self-check, the unit starts heating. At this time, the first three-way valve 3 is open, connecting the primary variable frequency circulating water pump 2 to the secondary circulating water pump 5 (heating is supplied to the underfloor heating coil 7 and fan coil unit 9). The air conditioning unit 1 heats the buffer water tank 4 (the buffer water tank 4 may also include a coupler and a conventional buffer water tank), and starts preheating adjustment. At this time, the second three-way valve 6 connects the first three-way valve 3 to the fan coil unit 9. The hot water in the buffer water tank 4 is then transported to the underfloor heating coil 7 through the secondary circulating water pump 5. The circulating water flow of the secondary circulating water pump 5 is relatively small, and the secondary circulating water pump 5 can be set to operate at a preset medium frequency. The unit then starts the corresponding underfloor heating preheating / air conditioning heating.

[0038] Step 2: Determine if the water temperature Tn4 inside the buffer tank 4 reaches the preset temperature T1, i.e., Tn4 ≥ T1 + 2 (2 is the temperature coefficient, which can be adjusted). If not, return to Step 1. If yes, the secondary circulation water pump 5 operates at the preset high frequency, and the second three-way valve 6 connects the pipeline between the underfloor heating coil 7 and the fan coil unit 9 (it should be noted that during the installation of the underfloor heating coil 7 and the fan coil unit 9, attention should be paid to hydraulic adjustment so that the water resistance of the underfloor heating coil 7 is greater than that of the fan coil unit 9). At this time, the hot water in the buffer tank 4 is transported to the underfloor heating coil 7 and the fan coil unit 9 through the secondary circulation water pump 5. The water valve of the fan coil unit 9 / 9b is opened, realizing the secondary pump's top and bottom water heating (two-dimensional heating). The circulating water flows back to the buffer tank 4.

[0039] Step 3: Determine whether the internal water temperature Tn4 of the buffer tank reaches the preset temperature T2 (T2>T1), i.e., Tn4≥T2+2 (2 is the temperature coefficient, which can be adjusted). If not, return to step 2. If yes, after 30 seconds (the time can be adjusted), the first three-way valve 3 will switch, and the hot water from the air conditioning unit 1 will be directly delivered to the radiator 8. The delivery circuit is that the hot water from the air conditioning unit 1 goes through the primary variable frequency circulating water pump 2 and the first three-way valve 3 to the radiator 8. At this time, the hot water in the buffer tank 4 is delivered to the underfloor heating coil 7 and the fan coil unit 9 through the secondary circulating water pump 5. At the same time, the return water of each load is delivered to the buffer tank 4, so as to achieve capacity output adaptation while ensuring sufficient load supply.

[0040] Step 4: Determine whether the user's target has been reached using the room sensors. If so, stop the machine at the temperature point; otherwise, return to step 3.

[0041] Example 3 According to an embodiment of the present invention, a method embodiment for controlling an air conditioning water system is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0042] Figure 5 This is a flowchart of a cooling control method for an air conditioning water system according to an embodiment of the present invention, such as... Figure 5 As shown, the method includes the following steps: Step S501: After the air conditioning unit starts cooling, the first three-way valve is opened, and the chilled water from the air conditioning unit is delivered to the floor heating coil and the fan coil unit.

[0043] This step is used to implement the floor cooling pre-cooling function. The floor is pre-cooled through a secondary circulation system to avoid problems such as deformation and condensation caused by sudden temperature drops. During this time, the fan is not turned on to prevent it from blowing hot air. Specifically, the first three-way valve is controlled to open the pipeline between the primary and secondary variable frequency circulating water pumps, allowing chilled water from the air conditioning unit to be delivered to the buffer tank; the second three-way valve is controlled to open the pipeline between the first three-way valve and the fan coil unit.

[0044] In step S502, after detecting that the cold water temperature in the buffer water tank reaches the third preset temperature T3, the first three-way valve is controlled to switch, and the second three-way valve is controlled to open the pipeline between the first three-way valve and the fan coil unit. The cold water from the air conditioning unit is directly delivered to the fan coil unit, and the cold water from the buffer water tank is delivered to the underfloor heating coil unit, so as to achieve a cooling temperature of the fan coil unit lower than that of the underfloor heating coil unit.

[0045] This step is used to achieve two-dimensional cooling for both underfloor heating and fan coil units. When the temperature reaches T3 (e.g., 18°C), the first three-way valve switches, and the water from the air conditioning unit is directly delivered to the fan coil unit (water temperature around 7°C), and then returned to the buffer tank. This achieves rapid cooling.

[0046] In cooling mode, the two-way valve of the radiator remains closed, preventing chilled water from flowing into the radiator from the air conditioning unit. This embodiment proposes a cooling control scheme based on energy adaptation and regulation for the secondary circulating water system of the air conditioning unit. By controlling the water pump and three-way valve, the air conditioning water system can reach the target water temperature more quickly. At the same time, by reducing the temperature difference of the stored water, energy consumption is reduced, thereby improving the unit's capacity efficiency, increasing energy utilization efficiency, achieving rapid heating and cooling of the space, and improving user comfort.

[0047] Figure 6 This is a flowchart of the rapid cooling control of a secondary circulating water system according to an embodiment of the present invention, such as... Figure 6 As shown, the rapid cooling control process of the secondary circulating water system in this embodiment is as follows: Step 1: The floor cooling pre-cooling function is activated, and the unit supplies cooling to the buffer water tank, which is then circulated by the circulating water pump. Specifically, when the air conditioning unit 1 receives a cooling demand, it starts the cooling cycle. The first three-way valve 3 opens the pipeline between the primary variable frequency circulating water pump 2 and the secondary circulating water pump 5, allowing the air conditioning unit 1 to supply cooling to the buffer water tank 4 and initiate pre-cooling regulation. At this time, the second three-way valve 6 opens the pipeline between the first three-way valve 3 and the fan coil unit 9. This action is to cut off the cold water flow path from the secondary circulating water pump 5 to the fan coil unit 9. The secondary circulating water pump 5 has a smaller circulating water flow rate and can operate at a preset medium frequency.

[0048] Step 2: Determine whether the internal water temperature Tn4 of the buffer tank reaches the preset temperature T3, i.e., whether Tn4≤T3-2 is true (2 is the temperature coefficient, which is adjustable). If not, return to step 1. If yes, after 30 seconds (the time is adjustable), control the first three-way valve 3 to switch directions, connecting the pipeline between the primary variable frequency circulating water pump 2 and the fan coil unit 9. The chilled water from the air conditioning unit 1 is delivered to the fan coil unit 9 via the primary variable frequency circulating water pump 2, the first three-way valve 3, and the second three-way valve 6. The chilled water from the buffer tank 4 is delivered to the underfloor heating coil 7 via the secondary circulating water pump 5, achieving low-temperature cooling for the fan coil unit and medium-temperature cooling for the floor.

[0049] Step 3: Determine whether the user's target has been reached using the room sensors. If so, stop the machine at the temperature point; otherwise, return to Step 2.

[0050] It should be noted that in cooling mode, the two-way valve of radiator 8 is always closed.

[0051] Example 4 This embodiment provides an electronic device for a control method of an air conditioning water system. The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein... The memory stores instructions that can be executed by the processor. These instructions are executed by the at least one processor to enable the at least one processor to: propose an energy-adaptive regulation control scheme based on the secondary circulating water system of an air conditioner. By controlling the water pump and three-way valve, the air conditioner water system can reach the target water temperature more quickly. At the same time, by reducing the temperature difference of the stored water, the energy consumption is reduced, thereby improving the unit's capacity and energy efficiency, improving energy use efficiency, achieving rapid heating and cooling of the space, and improving user comfort.

[0052] Example 5 This invention provides software for executing the technical solutions described in the above embodiments and preferred embodiments.

[0053] This invention provides a non-volatile computer storage medium storing computer-executable instructions that can execute the control method of the air conditioning water system in any of the above method embodiments.

[0054] The aforementioned storage medium stores the aforementioned software, and the storage medium includes, but is not limited to, optical discs, floppy disks, hard disks, and rewritable memory.

[0055] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0056] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0057] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0058] 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 units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0059] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0060] If the integrated unit is implemented as 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. This computer software product is stored in a storage medium and includes several 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 methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0061] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0062] The electronic devices of this invention exist in various forms, including but not limited to: (1) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0063] (2) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include PDAs, MIDs, and UMPCs, such as the iPad.

[0064] (3) Portable entertainment devices: These devices can display and play multimedia content. This category includes audio and video players (such as iPods), handheld game consoles, e-book readers, as well as smart toys and portable car navigation devices.

[0065] (4) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, device bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0066] (5) Other electronic devices with data interaction functions, such as televisions and in-vehicle screens.

[0067] The device embodiments described above are merely illustrative. 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 modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0068] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method based on an air conditioning water system, characterized in that, An air conditioning water system includes: an air conditioning unit, a buffer water tank, underfloor heating coils, radiators, and fan coil units; wherein, a primary variable frequency circulating water pump and a first three-way valve are installed between the air conditioning unit and the buffer water tank, and a second three-way valve is installed between one branch of the first three-way valve and the fan coil unit; the other branch of the first three-way valve is connected to the radiator; a secondary circulating water pump delivers water from the buffer water tank to the underfloor heating coils; the secondary circulating water pump delivers water from the buffer water tank to the fan coil units via the second three-way valve, the method comprising: After the air conditioning unit is turned on for heating, the first three-way valve is opened, and the hot water from the air conditioning unit is delivered to the underfloor heating coils and fan coil units. After detecting that the water temperature in the buffer tank has reached the first preset temperature T1, the second three-way valve opens the pipeline between the underfloor heating coil and the fan coil unit. Once the water temperature in the buffer tank reaches the second preset temperature T2, the first three-way valve is switched, and the hot water from the air conditioning unit is directly delivered to the radiator and returned to the buffer tank.

2. The method according to claim 1, characterized in that, After the air conditioning unit starts heating, the first three-way valve is opened, and the hot water from the air conditioning unit is delivered to the underfloor heating coils and fan coil units, including: The first three-way valve is opened, and the hot water from the air conditioning unit is delivered to the floor heating coil and fan coil unit via the primary variable frequency circulating water pump, the first three-way valve, the buffer water tank, and the secondary circulating water pump. The system controls the heating of the buffer water tank and controls the second three-way valve to open the pipeline between the first three-way valve and the fan coil unit. The hot water from the air conditioning unit is delivered to the fan coil unit via a primary variable frequency circulating water pump, the first three-way valve, and the second three-way valve. The hot water from the air conditioning unit is delivered to the underfloor heating coil via a primary variable frequency circulating water pump, the first three-way valve, the buffer water tank, and the secondary circulating water pump. The secondary circulating water pump operates at a preset medium frequency.

3. The method according to claim 1, characterized in that, After the water temperature in the buffer tank reaches the first preset temperature T1, the second three-way valve opens the pipeline between the underfloor heating coil and the fan coil unit, including: The second three-way valve is controlled to open the pipeline between the underfloor heating coil and the fan coil unit, so that the hot water in the buffer water tank is delivered to the underfloor heating coil and the fan coil unit through the secondary circulation water pump; wherein, the secondary circulation water pump operates at a preset high frequency.

4. A control method based on an air conditioning water system, characterized in that, An air conditioning water system includes: an air conditioning unit, a buffer water tank, underfloor heating coils, radiators, and fan coil units; wherein, a primary variable frequency circulating water pump and a first three-way valve are installed between the air conditioning unit and the buffer water tank, and a second three-way valve is installed between one branch of the first three-way valve and the fan coil unit; the other branch of the first three-way valve is connected to the radiator; a secondary circulating water pump delivers water from the buffer water tank to the underfloor heating coils; the secondary circulating water pump delivers water from the buffer water tank to the fan coil units via the second three-way valve, the method comprising: After the air conditioning unit is turned on for cooling, the first three-way valve is opened, and the chilled water from the air conditioning unit is delivered to the underfloor heating coils and fan coil units. After detecting that the cold water temperature in the buffer water tank reaches the third preset temperature T3, the first three-way valve is controlled to switch, and the second three-way valve is controlled to open the pipeline between the first three-way valve and the fan coil unit. The cold water from the air conditioning unit is directly delivered to the fan coil unit, and the cold water from the buffer water tank is delivered to the underfloor heating coil unit, so that the cooling temperature of the fan coil unit is lower than that of the underfloor heating coil unit.

5. The method according to claim 4, characterized in that, After the air conditioning unit starts cooling, the first three-way valve is opened, and the chilled water from the air conditioning unit is delivered to the underfloor heating coils and fan coil units, including: Control the first three-way valve to open the pipeline between the primary variable frequency circulating water pump and the secondary circulating water pump, and the chilled water of the air conditioning unit is delivered to the buffer water tank; Control the second three-way valve to connect the pipeline between the first three-way valve and the fan coil unit.

6. The method according to claim 4, characterized in that, The method further includes: The two-way valve of the radiator is always closed.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1 to 3.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 4 to 6.

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