Buffer tank, Multi-connected supply system, Multi-connected supply system control method and Storage medium

Abstract

The application provides a buffer water tank, a multi-coupling supply system, a multi-coupling supply system control method and a storage medium. The buffer water tank is provided with a first chamber and a second chamber, and a flow control device for controlling the communication between the first chamber and the second chamber. The buffer water tank is provided with a first opening and a second opening for communicating with the first chamber, and a third opening and a fourth opening for communicating with the second chamber. The first opening is connected to the water outlet of the outdoor heat exchange component in the multi-coupling supply system, so that the hot water or cold water output by the outdoor heat exchanger is exchanged with the water in the first chamber and then flows out from the second opening to the indoor heat exchange component, reducing the heat exchange loss of the water flowing through the water tank. Meanwhile, the communication between the first chamber and the second chamber can be controlled when necessary, so that the water flowing out of the outdoor heat exchanger is exchanged with all the water in the water tank, realizing pressure reduction protection for the multi-coupling supply system, and further improving the use performance of the buffer water tank and the multi-coupling system.

Description

Technical Field

[0001] This application relates to the field of combined heat and power (CHP) technology, specifically to a buffer water tank, a CHP system, a CHP system control method, and a storage medium. Background Technology

[0002] In multi-generation water supply systems, buffer tanks are typically connected in series to ensure stable internal pressure. These tanks serve to reduce pressure and protect the operating system. However, in related technologies, when the multi-generation system is in heating / cooling mode, regardless of the current work demand, a portion of the heating / cooling capacity is used to heat / cool all the water in the buffer tank, resulting in significant waste and reducing the performance of the buffer tank. Summary of the Invention

[0003] This application provides a buffer water tank, a multi-generation system, a control method for the multi-generation system, and a storage medium, aiming to solve the problem that regardless of the amount of work demand in the multi-generation system, heat exchange occurs with the water inside the buffer water tank, resulting in significant waste and low performance of the flushing tank, thereby improving the performance of the flushing tank.

[0004] In a first aspect, this application provides a buffer water tank, which is provided with a first chamber and a second chamber, and a flow control device for controlling the communication between the first chamber and the second chamber. The buffer water tank is provided with a first opening and a second opening that communicate with the first chamber, and a third opening and a fourth opening that communicate with the second chamber.

[0005] In one possible implementation of this application, the buffer tank is provided with a first partition and a second partition at intervals, the first partition and the second partition dividing the buffer tank into a first chamber, a second chamber, and a third chamber disposed between the first partition and the second partition;

[0006] The flow control device includes a first control valve disposed on the first partition and a second control valve disposed on the second partition.

[0007] Secondly, this application provides a combined heat and power (CHP) system, the CHP system comprising:

[0008] Outdoor heat exchange components;

[0009] Indoor heat exchange component; the buffer water tank mentioned above, wherein the first opening of the buffer water tank is connected to the outlet of the outdoor heat exchange component, the second opening of the buffer water tank is connected to the input end of the indoor heat exchange component, the third opening of the buffer water tank is connected to the inlet of the outdoor heat exchange component, and the fourth opening of the buffer water tank is connected to the output port of the indoor heat exchange component.

[0010] In one possible implementation of this application, the outdoor heat exchange assembly includes a compressor and a water-side heat exchanger, the water-side heat exchanger comprising:

[0011] A housing, wherein an inlet and an outlet are provided on the housing; and

[0012] The housing contains a first heat exchanger, a second heat exchanger located on one side of the first heat exchanger, and a third heat exchanger. The first heat exchanger is connected to the refrigerant of the compressor. One end of the second heat exchanger is connected to the water inlet. The other end of the second heat exchanger is connected to one end of the third heat exchanger. The other end of the third heat exchanger is connected to the water outlet.

[0013] Thirdly, this application provides a control method for a combined heat and power (CHP) system, applicable to any of the CHP systems described in the previous application, the method comprising:

[0014] The target temperature corresponding to the target indoor heat exchanger in the work done by the indoor heat exchange components of the multi-generation system is obtained. The target temperature is the target water temperature corresponding to the target indoor heat exchanger, or the ambient temperature where the target indoor heat exchanger is located.

[0015] The flow control parameters of the flow control device in the buffer tank of the multi-generation system are determined based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger.

[0016] The flow control device is adjusted according to the flow control parameters.

[0017] In one possible implementation of this application, the outdoor heat exchange component of the combined heat and power system includes a compressor, and a fourth heat exchanger and a first heat exchanger connected to the refrigerant in the compressor.

[0018] The step of determining the flow control parameters of the flow control device in the buffer tank of the multi-generation system based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger includes:

[0019] Calculate the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger;

[0020] If the temperature difference value is greater than or equal to the first preset temperature difference threshold, then zero is set as the flow control parameter;

[0021] If the temperature difference value is less than the first preset temperature difference threshold and greater than the second preset temperature difference threshold, then the preset maximum flow rate value is set as the flow control parameter, wherein the first preset temperature difference threshold is greater than the second preset temperature difference threshold.

[0022] If the temperature difference value is less than or equal to the second preset temperature difference threshold, the flow control parameter is determined based on the first heat exchange temperature of the first heat exchanger in the multi-generation system, the second heat exchange temperature of the fourth heat exchanger, and the exhaust temperature of the compressor.

[0023] In one possible implementation of this application, determining the flow control parameters based on the first heat exchange temperature of the first heat exchanger in the combined heat and power system, the second heat exchange temperature of the fourth heat exchanger, and the compressor discharge temperature includes:

[0024] The first heat exchange temperature of the first heat exchanger, the second heat exchange temperature of the fourth heat exchanger, and the exhaust temperature of the compressor are obtained.

[0025] The first heat exchange pressure of the first heat exchanger is determined based on the first heat exchange temperature and the exhaust temperature, wherein the first heat exchange pressure is the evaporation pressure or the condensation pressure.

[0026] The second heat exchange pressure of the fourth heat exchanger is determined based on the second heat exchange temperature and the exhaust temperature, wherein the second heat exchange pressure is the evaporation pressure or the condensation pressure;

[0027] Based on the relationship between the ratio of the first heat exchange pressure to the second heat exchange pressure and the preset pressure ratio, the flow control parameter is determined to be either the preset maximum flow value or zero.

[0028] In one possible implementation of this application, the flow control device includes a first control valve and a second control valve;

[0029] The process involves adjusting the flow control device according to the flow control parameters.

[0030] If the flow control parameter is a preset maximum value, then the first control valve and the second control valve are controlled to open;

[0031] If the flow control parameter is zero, then the first control valve and the second control valve are controlled to close.

[0032] In one possible implementation of this application, the indoor heat exchange component of the multi-generation system includes at least two indoor heat exchangers connected in parallel;

[0033] The step of obtaining the target temperature corresponding to the target indoor heat exchanger in the process of obtaining the work done by the indoor heat exchange components of the multi-generation system includes:

[0034] If a work command is received corresponding to at least two parallel indoor heat exchangers, the work priority of the indoor heat exchanger corresponding to each work command is obtained.

[0035] Determine the target indoor heat exchanger corresponding to the highest work priority among the work priorities, and obtain the heat exchange type of the target indoor heat exchanger;

[0036] If the heat exchange type of the target indoor heat exchanger is temperature regulation, then obtain the ambient temperature of the environment where the target indoor heat exchanger is located;

[0037] If the heat exchange type of the target indoor heat exchanger is water temperature regulation, then obtain the target water temperature corresponding to the target indoor heat exchanger.

[0038] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in any of the multi-generation system control methods described above.

[0039] This application provides a buffer water tank, a multi-generation system, a control method for the multi-generation system, and a storage medium. The buffer water tank comprises a first chamber and a second chamber, and a flow control device for controlling the communication between the first and second chambers. The buffer water tank has a first opening and a second opening connecting to the first chamber, and a third opening and a fourth opening connecting to the second chamber. The first opening connects to the outlet of the outdoor heat exchange component in the multi-generation system, ensuring that the hot water (heating mode) or cold water (cooling mode) output from the outdoor heat exchanger is only connected to the first chamber. After heat exchange, the water in the chamber flows out through the second opening to the indoor heat exchange component, reducing heat loss as the water flows through the tank. Furthermore, a second chamber is provided within the buffer tank to provide a pathway for water to flow from the indoor heat exchanger to the outdoor heat exchanger after heat exchange. A flow control device connecting the first and second chambers is also provided, which can control the connection between the first and second chambers when necessary, allowing the water flowing out of the outdoor heat exchanger to exchange heat with all the water in the tank (water in the first and second chambers). This achieves pressure reduction protection for the multi-generation system, thereby improving the performance of the buffer tank and the multi-generation system. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A schematic diagram of one embodiment of the buffer tank provided in this application;

[0042] Figure 2A schematic diagram of one embodiment of the combined heat and power (CHP) system provided for the implementation of this application;

[0043] Figure 3 This is a schematic diagram of one embodiment of the multi-generation system provided in this application.

[0044] Figure 4 This is a schematic flowchart of one embodiment of the control method for a multi-generational power supply system in this application.

[0045] Figure 5 This is a flowchart illustrating one implementation method for determining flow control parameters in the control method for a multi-source power supply system provided in this application.

[0046] In the picture:

[0047] 1. Buffer tank; 10. First chamber; 100. First opening; 101. Second opening; 11. Second chamber; 110. Third opening; 111. Fourth opening; 12. Flow control device; 120. First control valve; 121. Second control valve; 13. First partition; 14. Second partition; 15. Third chamber; 2. Outdoor heat exchange assembly; 20. Compressor; 21. Water-side heat exchanger; 210. First heat exchanger; 211. Second heat exchanger; 212. Third heat exchanger; 3. Indoor heat exchange assembly. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this embodiment, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following associated objects have an "or" relationship.

[0051] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0052] Currently, in heating / cooling mode (for example, a tri-generation system), regardless of the current load, a portion of the heating / cooling capacity of a multi-generation system is used to heat / cool the water in the buffer tank, without actually providing effective output to the user. This results in slow room heating / cooling and a poor user experience. Furthermore, the system heats / cools the water in the buffer tank simultaneously regardless of its energy efficiency rating, leading to significant waste. There is currently no satisfactory solution.

[0053] This patent proposes a method for controlling the energy storage of a variable-volume buffer water tank.

[0054] This application provides a buffer water tank, a multi-generation system, a multi-generation system control method, and a computer-readable storage medium (hereinafter referred to as the storage medium). The multi-generation system control method switches the appropriate buffer water tank volume based on the difference ΔT between the current water temperature T and the set temperature T of the multi-generation system, so as to provide rapid and efficient heating / cooling according to user needs; and performs energy storage control based on the current operating energy efficiency. This improves the comfort and energy efficiency of the product. Detailed descriptions follow.

[0055] For details, see Figure 1 , Figure 1 The schematic diagram shows one embodiment of the buffer tank 1 provided in this application. The buffer tank 1 is provided with a first chamber 10 and a second chamber 11, and a flow control device 12 for controlling the communication between the first chamber 10 and the second chamber 11. The buffer tank 1 is provided with a first opening 100 and a second opening 101 communicating with the first chamber 10, and a third opening 110 and a fourth opening 111 communicating with the second chamber 11.

[0056] The first chamber 10 and the second chamber 11 can be arranged side-by-side or vertically. In this embodiment, the first chamber 10 is located above the second chamber 11. The first opening 100 of the first chamber 10 is used to connect to the outlet of the outdoor heat exchange component 2 in the multi-generation system, and the second opening 101 is used to connect to the input end of the indoor heat exchanger. That is, the first opening 100 and the second opening 101 are used to connect the output path between the indoor heat exchange component 3 and the outdoor heat exchange component 2 in the training system. Similarly, the third opening 110 of the buffer tank 1 is connected to the inlet of the outdoor heat exchange component 2, and the fourth opening 111 of the buffer tank 1 is connected to the output port of the indoor heat exchange component 3. That is, the first opening 100 and the second opening 101 are used to connect the input path between the indoor heat exchange component 3 and the outdoor heat exchange component 2 in the training system.

[0057] It is understood that the first opening 100, the second opening 101, the third opening 110, and the fourth opening 111 are respectively connected to the interior and exterior of the buffer water tank 1. In order to ensure the installation sealing of the buffer water tank 1, the first opening 100, the second opening 101, the third opening 110, and the fourth opening 111 are respectively provided with mounting parts for installing refrigerant pipes. The mounting parts may include threaded mechanisms that engage with the threads on the refrigerant pipes, or mounting bayonets that engage with the mounting ends of the refrigerant pipes. The mounting parts may also be provided with rubber gaskets to ensure the sealing of the buffer water tank 1.

[0058] In one embodiment of this application, the flow control device 12 is a flow valve; in another embodiment of this application, the flow control device 12 may also be a switching valve.

[0059] Further, see Figure 1 In one embodiment of this application, the buffer tank 1 is provided with a first partition 13 and a second partition 14 at intervals, the first partition 13 and the second partition 14 dividing the buffer tank 1 into a first chamber 10, a second chamber 11, and a third chamber 15 disposed between the first partition 13 and the second partition 14; the flow control device 12 includes a first control valve 120 disposed on the first partition 13 and a second control valve 121 disposed on the second partition 14.

[0060] It is understood that the first partition 13 and the second partition 14 can be fixedly connected to the interior of the buffer tank 1, that is, the first partition 13 and the second partition 14 can be an integral structure with the buffer tank 1, or the first partition 13 and the second partition 14 can be detachably connected to the interior of the buffer tank 1. For example, the inner wall of the buffer tank 1 is provided with a mounting groove that is connected end to end, and the first partition 13 and the second partition 14 are spaced apart in the mounting groove. Optionally, a rubber ring can also be provided in the mounting groove to ensure the sealing between the first chamber 10, the second chamber 11 and the third chamber 15.

[0061] It is understood that the size of the gap between the first partition 13 and the second partition 14 is not specifically limited in this application. For example, in one embodiment of this application, the first partition 13 and the second partition 14 are respectively located at one-third and two-thirds of the height of the buffer tank 1; or, the first partition 13 and the second partition 14 are located inside the buffer tank 1 to divide the interior of the buffer tank 1 into a larger third chamber 15 and a smaller first chamber 10 and a smaller second chamber 11, that is, the volume of the third chamber 15 is greater than the volume of the first chamber 10 and the volume of the third chamber 15 is greater than the volume of the second chamber 11, so as to further reduce the heat exchange of the buffer tank 1. The specific design can be made according to actual needs.

[0062] It is understood that in the technical solution of this application, by setting a first partition 13 and a second partition 14 inside the buffer water tank 1, the buffer water tank 1 is divided into a first chamber 10, a second chamber 11, and a third chamber 15 located between the first partition 13 and the second partition 14, thereby further reducing the amount of hot water exchanged in the first chamber 10 and the second chamber 11, and thus minimizing the heat exchange loss in the buffer water tank 1.

[0063] It is understood that in some other embodiments of this application, the buffer tank 1 may be provided with only one partition to divide the interior of the buffer tank 1 into a first chamber 10 and a second chamber 11. Specifically, the number of partitions can be designed according to the heat exchange loss requirements and the pressure design requirements of the buffer tank 1.

[0064] Furthermore, based on any of the above implementation schemes, this application also provides a schematic diagram of the implementation scheme for a combined cooling, heating, and power (CCHP) system, see [link / reference]. Figure 2 , Figure 2 A schematic diagram of one embodiment of the combined heat and power (CHP) system provided for the implementation of this application is shown. Specifically, the CHP system includes:

[0065] Outdoor heat exchange component 2;

[0066] The indoor heat exchange component 3; and the buffer water tank 1 as described in any of the above embodiments, wherein the first opening 100 of the buffer water tank 1 is connected to the outlet of the outdoor heat exchange component 2, the second opening 101 of the buffer water tank 1 is connected to the input end of the indoor heat exchange component 3, the third opening 110 of the buffer water tank 1 is connected to the inlet of the outdoor heat exchange component 2, and the fourth opening 111 of the buffer water tank 1 is connected to the output port of the indoor heat exchange component 3.

[0067] For example, the indoor heat exchange component 3 may include multiple parallel indoor heat exchangers and multiple parallel indoor heat exchangers for different working functions (multi-supply system working, underfloor heating working, water heater working). For example, when the multi-supply system is a tri-supply system, the indoor heat exchange component 3 includes a fan coil and an underfloor heating coil. The fan coil and the underfloor heating coil are connected in parallel. The fan coil may include multiple fan coil heat exchangers connected in series, and the underfloor heating coil may also include multiple underfloor heating coil heat exchangers connected in series.

[0068] Specifically, the multi-generation system also includes a three-way valve, which is used to connect multiple parallel indoor heat exchangers in the indoor heat exchange assembly 3 to the outdoor heat exchanger respectively. For example, the first flow opening of the three-way valve is connected to the second outlet of the buffer water tank 1, the second flow opening of the three-way valve is connected to the inlet of the fan coil unit, and the third flow opening of the three-way valve is connected to the inlet of the underfloor heating coil.

[0069] It is understood that the multi-generation system is equipped with multiple water pumps to provide power to the multi-generation system, and a multi-way valve can also be installed between the buffer water tank 1 and the outdoor heat exchange component 2 to realize the refrigerant regulation for cooling and heating.

[0070] Further, see Figure 2 In one embodiment of this application, the outdoor heat exchange assembly 2 includes a compressor 20 and a water-side heat exchanger 21, wherein the water-side heat exchanger 21 includes:

[0071] The housing has an inlet and an outlet; and a first heat exchanger 210, a second heat exchanger 211 and a third heat exchanger 212 disposed on one side of the first heat exchanger 210 are disposed inside the housing. The first heat exchanger 210 is connected to the refrigerant of the compressor 20. One end of the second heat exchanger 211 is connected to the inlet, the other end of the second heat exchanger 211 is connected to one end of the third heat exchanger 212, and the other end of the third heat exchanger is connected to the outlet.

[0072] The third heat exchanger 212 is an electric heater used to assist in heating the water circulation system.

[0073] It is understood that the outdoor heat exchange assembly 2 also includes a fourth heat exchanger (not shown), that is, the fourth heat exchanger forms a closed refrigerant circuit with the compressor 20 and the first heat exchanger 210. Specifically, during cooling, the first heat exchanger 210 generates evaporation pressure and the fourth heat exchanger generates condensation pressure; during heating, the first heat exchanger 210 generates condensation pressure and the fourth heat exchanger generates evaporation pressure.

[0074] It is understood that the refrigerant connection in the multi-source heat pump system is achieved through refrigerant pipes. The multi-source heat pump system control method in this embodiment of the invention is applied to a multi-source heat pump system including a buffer tank 1. Exemplarily, the multi-source heat pump system may include one or more processors, a memory, and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor as steps in the multi-source heat pump system control method.

[0075] It is understood that the devices included in the multi-generation system do not constitute a limitation on the embodiments of the present invention. That is, the number or type of multi-generation system included in the scenario of the heat exchanger clogging detection method, or the number or type of devices included in each multi-generation system, do not affect the overall implementation of the technical solution in the embodiments of the present invention, and can all be considered as equivalent substitutions or derivatives of the technical solutions claimed in the embodiments of the present invention.

[0076] In this embodiment of the invention, the multi-generation system is mainly used for: obtaining the target temperature corresponding to the target indoor heat exchanger in the work done by the indoor heat exchange component 3 of the multi-generation system, wherein the target temperature is the target water temperature corresponding to the target indoor heat exchanger or the ambient temperature where the target indoor heat exchanger is located; determining the flow control parameters of the flow control device 12 in the buffer tank 1 of the multi-generation system based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger; and controlling the flow control device 12 to make adjustments based on the flow control parameters.

[0077] In one embodiment of this application, the multi-generation system may be equipped with a display device, or the multi-generation system may not have a display device but may communicate with an external display device. The display device is used to output the results of the heat exchanger clogging detection method executed in the multi-generation system. The multi-generation system can access a background database (the background database may be located in the local storage of the multi-generation system or it may be located in the cloud), which stores information related to heat exchanger clogging detection.

[0078] Specifically, see Figure 3 A multi-source power supply system may include components such as a processor 1001 with one or more processing cores, a memory 1002 with one or more computer-readable storage media, a power supply 1003, and an input unit 1004. Those skilled in the art will understand that... Figure 3 The multi-source power supply system structure shown does not constitute a limitation on the multi-source power supply system. It may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0079] The processor 1001 is the control center of the multi-source heat pump system. It connects to various parts of the system via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 1002, and by calling data stored in the memory 1002, it performs various functions and processes data of the multi-source heat pump system, thereby providing overall monitoring of the system. It is understood that the processor 1001 communicates with the controller via signal transmission. Optionally, the processor 1001 may include one or more processing cores; preferably, the processor 1001 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 1001.

[0080] The memory 1002 can be used to store software programs and modules. The processor 1001 executes various functional applications and data processing by running the software programs and modules stored in the memory 1002. The memory 1002 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the multi-power system, etc. In addition, the memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 1002 may also include a memory controller to provide the processor 1001 with access to the memory 1002.

[0081] In some embodiments of this application, the control device for the combined heat and power (CHP) system can be implemented as a computer program, and the computer program can be implemented in, for example... Figure 3 The method operates on the multi-source power supply system shown. The memory of the multi-source power supply system can store various program modules that make up the filter clogging detection method of the multi-source power supply system. The computer program composed of the various program modules causes the processor to execute the steps in the filter clogging detection method of the multi-source power supply system described in the various embodiments of this application.

[0082] The multi-source heat pump system includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The network interface is used for communication with external multi-source heat pump systems via a network connection. When the computer program is executed by the processor, it implements a method for detecting filter clogging in the multi-source heat pump system.

[0083] The combined cooling, heating, and power supply system also includes a power supply 1003 that supplies power to each component. Preferably, the power supply 1003 can be logically connected to the processor 1001 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 1003 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0084] The multi-generation system may also include an input unit 1004, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0085] Although not shown, the multi-source power supply system may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 1001 in the multi-source power supply system loads the executable files corresponding to the processes of one or more application programs into the memory 1002 according to the following instructions, and the processor 1001 runs the application programs stored in the memory 1002 to realize various functions, as follows:

[0086] The fan speed parameter of the fan in the heat exchanger blockage detection device is obtained, and the actual pressure parameter is obtained based on the pressure detection component of the heat exchanger blockage detection device. The actual pressure parameter is a pressure value or a speed value, and the fan speed parameter includes the fan speed and / or the fan speed setting.

[0087] Based on the fan speed parameters and the pressure parameters, the fouling value of the heat exchanger in the heat exchange fouling detection device is determined, and the fouling value is fed back.

[0088] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0089] Therefore, embodiments of the present invention provide a computer-readable storage medium (hereinafter referred to as the storage medium), which may include: read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc. A computer program is stored thereon, which is loaded by a processor to execute the steps in any of the filter clogging detection methods for multi-generation systems provided in the embodiments of the present invention. For example, the computer program loaded by the processor can execute the following steps:

[0090] The target temperature corresponding to the target indoor heat exchanger in the work done by the indoor heat exchange components of the multi-generation system is obtained. The target temperature is the target water temperature corresponding to the target indoor heat exchanger, or the ambient temperature where the target indoor heat exchanger is located.

[0091] The flow control parameters of the flow control device in the buffer tank of the multi-generation system are determined based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger.

[0092] The flow control device is adjusted according to the flow control parameters.

[0093] Furthermore, this application also provides an implementation scheme for a control method of a combined heat and power (CHP) system, which is applied to a CHP system as described in any of the above implementation schemes, such as... Figure 4 The diagram shown is a flowchart of an embodiment of the control method for a multi-source power supply system in this application. The control method for the multi-source power supply system includes steps S401-S403:

[0094] S401. Obtain the target temperature corresponding to the target indoor heat exchanger in the work done by the indoor heat exchange components of the multi-generation system.

[0095] It is understood that the indoor heat exchange components in the multi-generation system include multiple indoor heat exchange terminals. That is, the indoor heat exchange terminal corresponds to multiple parallel indoor heat exchanger groups of the indoor heat exchange components. Each heat exchanger group corresponds to one indoor heat exchange terminal. Each heat exchanger group may include at least one indoor heat exchanger. For example, the indoor heat exchange terminal includes the multi-generation system heat exchange terminal (fan coil), the underfloor heating heat exchange terminal, the water heater, etc. (the water heater includes a water container and a heat exchange coil disposed in the water container. The heat exchange coil is connected in parallel with the heat exchangers of other terminals, that is, it is connected to the water system.)

[0096] It can be further understood that in the multi-generation system, when one indoor heat exchange terminal is running, the other indoor heat exchange terminals are generally not running. The target indoor heat exchanger, that is, any indoor heat exchanger among the indoor heat exchange terminals that are performing work, can be understood as the uniformity of the parallel indoor heat exchangers among the indoor heat exchange terminals when the indoor heat exchange terminal is performing work. Therefore, any indoor heat exchanger among the indoor heat exchange terminals is set as the target indoor heat exchanger.

[0097] Wherein, the target temperature is the target water temperature corresponding to the target indoor heat exchanger, or the ambient temperature where the target indoor heat exchanger is located. It can be understood that, since indoor heat exchange terminals include different types, for example, water heaters, indoor units of multi-generation systems, etc., the target temperature is the ambient temperature corresponding to the target indoor heat exchanger. For example, if the heat exchange type of the target indoor heat exchanger is temperature regulation, such as a multi-generation system, then the ambient temperature of the environment where the target indoor heat exchanger is located is obtained; if the heat exchange type of the target indoor heat exchanger is water temperature regulation, such as a water heater, then the target water temperature corresponding to the target indoor heat exchanger is obtained, that is, the water temperature inside the water heater.

[0098] Specifically, the target temperature can be acquired during the operation of the combined heat and power system according to the preset temperature acquisition frequency, or when the operating command of the combined heat and power system is received, the command is parsed to determine the target indoor heat exchanger corresponding to the operating command and acquire the target temperature corresponding to the target indoor heat exchanger. The specific method can be adjusted according to the actual situation.

[0099] S402. Based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger, determine the flow control parameters of the flow control device in the buffer tank of the multi-generation system.

[0100] The flow control parameter is a parameter that controls the amount of refrigerant flowing between the first chamber and the second chamber. For example, the flow control parameter can be the opening degree of the flow control device.

[0101] Specifically, the method for determining the flow control parameters of the flow control device in the buffer tank of the combined cooling, heating, and power system based on the temperature difference value is not specifically limited in this application; an example is provided:

[0102] In one embodiment of this application, the flow control parameters corresponding to the temperature difference value can be obtained by looking up a preset mapping table corresponding to the temperature difference and control parameters.

[0103] In another embodiment of this application, by comparing the temperature difference value with a preset temperature difference threshold, a preset flow control parameter corresponding to the size relationship is determined as the flow control parameter corresponding to the temperature difference value.

[0104] S403. Adjust the flow control device according to the flow control parameters.

[0105] Specifically, after determining the flow control parameters, the multi-generation system adjusts the opening of the flow control device according to the flow control parameters so that the heat exchange demand of the target indoor heat exchanger in the indoor heat exchange assembly corresponds inversely to the heat exchange in the buffer water tank. For example, when the temperature difference is large, the heat exchange required by the target indoor heat exchanger is large, so the flow control parameter corresponding to the flow control device is controlled to zero to reduce the heat exchange in the buffer water tank and improve the heat exchange efficiency of the target indoor heat exchanger.

[0106] Furthermore, based on the above implementation scheme, this application also provides one implementation scheme for determining flow control parameters in a multi-generation system control method. In this implementation scheme, the outdoor heat exchange component in the multi-generation system used in the multi-generation system control method includes a compressor and a water-side heat exchanger. The water-side heat exchanger includes: a shell with an inlet and an outlet; a first heat exchanger disposed inside the shell; a second heat exchanger disposed on one side of the first heat exchanger; and a third heat exchanger. The first heat exchanger is connected to the refrigerant of the compressor, one end of the second heat exchanger is connected to the inlet, the other end of the second heat exchanger is connected to one end of the third heat exchanger, and the other end of the third heat exchanger is connected to the outlet. Specifically, the flow control parameters of the flow control device in the buffer tank of the multi-generation system are determined based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger, including the following steps:

[0107] (1) Calculate the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger.

[0108] (2) If the temperature difference value is greater than or equal to the first preset temperature difference threshold, then zero is set as the flow control parameter.

[0109] (3) If the temperature difference value is less than the first preset temperature difference threshold and greater than the second preset temperature difference threshold, then the preset maximum flow rate value is set as the flow control parameter, wherein the first preset temperature difference threshold is greater than the second preset temperature difference threshold.

[0110] (4) If the temperature difference value is less than or equal to the second preset temperature difference threshold, the flow control parameter is determined based on the first heat exchange temperature of the first heat exchanger in the multi-generation system, the second heat exchange temperature of the fourth heat exchanger, and the exhaust temperature of the compressor.

[0111] It is understood that the preset maximum flow rate value is the maximum opening degree of the flow control device, or when the flow control device only includes two states, open and closed, the preset maximum flow rate value is the flow control parameter corresponding to the open state of the flow control device. For example, the flow control parameter corresponding to the open state is 1, and the flow control parameter corresponding to the closed state is 0.

[0112] It is understood that if the temperature difference value is greater than or equal to the first preset temperature difference threshold, it indicates that the work demand of the target indoor heat exchanger is large. At this time, the preset maximum flow rate value is set to the flow control parameter, that is, the flow control device is turned off to reduce the heat exchange of the buffer water tank and improve the heat exchange efficiency of the target indoor heat exchanger.

[0113] If the temperature difference value is less than the first preset temperature difference threshold and greater than the second preset temperature difference threshold, it indicates that the heat exchange demand of the target indoor heat exchanger is moderate. The maximum flow rate value can be set as the flow control parameter to increase the heat exchange of the buffer water tank and realize the energy storage of the water tank.

[0114] Further, see Figure 5 , Figure 5 A flowchart illustrating one implementation scheme for determining flow control parameters in the control method for a combined heat and power (CHP) system provided in this application is shown, specifically including steps S501-S505:

[0115] S501. Calculate the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger.

[0116] S502. If the temperature difference value is less than or equal to the second preset temperature difference threshold, then obtain the first heat exchange temperature of the first heat exchanger, the second heat exchange temperature of the fourth heat exchanger, and the exhaust temperature of the compressor.

[0117] Specifically, if the temperature difference value is less than or equal to the second preset temperature difference threshold, it indicates that the energy consumption demand of the target indoor heat exchanger is not large. At this time, the flow control parameters are determined by considering the system pressure ratio in order to protect the system and store energy. That is, the first heat exchange temperature of the first heat exchanger, the second heat exchange temperature of the fourth heat exchanger, and the exhaust temperature of the compressor are further obtained. It can be understood that the first heat exchange temperature can be obtained by a temperature acquisition sensor installed on the first heat exchanger, the second heat exchange temperature of the fourth heat exchanger can be obtained by a temperature acquisition sensor installed on the second heat exchanger, and the exhaust temperature of the compressor can be obtained by a temperature acquisition sensor installed at the compressor exhaust port.

[0118] S503. Determine the first heat exchange pressure of the first heat exchanger based on the first heat exchange temperature and the exhaust temperature, wherein the first heat exchange pressure is the evaporation pressure or the condensation pressure.

[0119] It is understandable that when the target indoor heat exchanger of the multi-generation system is working in cooling mode, the first heat exchange pressure is the evaporation pressure; when the target indoor heat exchanger of the multi-generation system is working in heating mode, the first heat exchange pressure is the condensation pressure.

[0120] Specifically, determining the first heat exchange pressure of the first heat exchanger based on the first heat exchange temperature and the exhaust temperature includes:

[0121] The evaporation temperature is calculated using the formula: T_evaporation = A1 × T_exhaust + B1 × T_outer pipe + C1;

[0122] Calculate the condensing temperature using the formula: Tcondensing = A2 × Texhaust + B2 × Tplate heat exchanger + C2;

[0123] Wherein, A1, A2, B1, B2, C1, and C2 are preset parameters of the formula; T_exhaust is the exhaust temperature; T_outer pipe is the first heat exchange temperature or the second heat exchange temperature; when T_outer pipe is the first heat exchange temperature, T_plate is replaced by the second heat exchange temperature; when T_outer pipe is the second heat exchange temperature, T_plate is replaced by the first heat exchange temperature. The formula selection is related to the working mode (cooling / heating) of the target indoor heat exchanger.

[0124] S504. Determine the second heat exchange pressure of the fourth heat exchanger based on the second heat exchange temperature and the exhaust temperature, wherein the second heat exchange pressure is the evaporation pressure or the condensation pressure;

[0125] It can be further understood that when the target indoor heat exchanger of the multi-generation system is working in cooling mode, the second heat exchange pressure is the condensing pressure; when the target indoor heat exchanger of the multi-generation system is working in heating mode, the second heat exchange pressure is the evaporating pressure.

[0126] It is understandable that when the target indoor heat exchanger is doing cooling and heating work, the heat exchange state in the first heat exchanger and the second heat exchanger is different.

[0127] Specifically, the calculation formula for the second heat exchange pressure is described above.

[0128] S505. Based on the relationship between the ratio of the first heat exchange pressure to the second heat exchange pressure and the preset pressure ratio, determine the flow control parameter as the preset maximum flow value or zero.

[0129] Specifically, based on the ratio of the first heat exchange pressure to the second heat exchange pressure, refer to the calculation formula: E = Pcondensation / Pevaporation;

[0130] Wherein, Pcondensation is the condensation temperature, Pevaporation is the evaporation temperature, and E is the ratio.

[0131] If E ≤ Ecritical (preset pressure ratio), it indicates that the current pressure ratio of the combined heat and power system is relatively low, resulting in higher operating efficiency. At this time, the flow control parameter is set to the preset maximum flow value. That is, the first and second control valves are opened, and the first, second, and third chambers are connected. In other words, the buffer tank is switched to a large capacity, and the combined heat and power system operates at high efficiency, realizing energy storage in the buffer tank.

[0132] If E > Ecritical, it indicates that the current system pressure ratio is high and the operating efficiency is low. At this time, the flow control parameter is set to zero, that is, the first control valve and the second control valve are closed, the buffer tank is switched to a small volume, and the unit is shut down when the temperature is reached, thereby improving the system's work performance.

[0133] It is understandable that during the operation of the multi-generation system, the temperature difference ΔT between the target temperature and the set temperature of the target indoor heat exchanger can be continuously calculated and adjusted by controlling the flow control device.

[0134] Based on any of the above embodiments, in one embodiment of this application, the flow control device includes a first control valve and a second control valve; the step of adjusting the flow control device according to the flow control parameters specifically includes the following steps:

[0135] (1) If the flow control parameter is a preset maximum value, then control the first control valve and the second control valve to open;

[0136] (2) If the flow control parameter is zero, then control the first control valve and the second control valve to close.

[0137] Furthermore, based on any of the above embodiments, this application also provides a method for obtaining a target temperature. In this embodiment, the indoor heat exchange component in the multi-generation system includes at least two parallel indoor heat exchangers; specifically, obtaining the target temperature corresponding to the target indoor heat exchanger in the work done by the indoor heat exchange component of the multi-generation system includes the following steps:

[0138] (1) If at least two parallel indoor heat exchangers are received, the work priority of each indoor heat exchanger corresponding to the work command is obtained.

[0139] It is understood that the corresponding parallel indoor heat exchangers are preset with different work priorities to determine the target indoor unit to perform work when there is a conflict in the instructions of the multi-generation system. For example, when the multi-generation system simultaneously obtains the work instructions of the indoor unit of the multi-generation system and the work instructions of the water heater, the indoor heat exchanger identifier carried by the work instructions determines the corresponding priority.

[0140] (2) Determine the target indoor heat exchanger corresponding to the highest work priority in the work priority, and obtain the heat exchange type of the target indoor heat exchanger;

[0141] The heat exchange types include water temperature regulation and air temperature regulation. The heat exchange type can be preset for each indoor heat exchanger. For example, the indoor heat exchanger corresponding to the multi-generation system is of the air temperature regulation type, and the heat exchange type corresponding to the water heater is of the water temperature regulation type.

[0142] (3) If the heat exchange type of the target indoor heat exchanger is temperature regulation type, then obtain the ambient temperature of the environment where the target indoor heat exchanger is located;

[0143] (4) If the heat exchange type of the target indoor heat exchanger is water temperature regulation, then obtain the target water temperature corresponding to the target indoor heat exchanger. That is, the water temperature in the water tank to be heated corresponding to the target indoor heat exchanger.

[0144] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0145] In practice, each of the above units or structures can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments, which will not be repeated here.

[0146] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0147] The above provides a detailed description of a buffer water tank, a multi-generation system, a multi-generation system control method, and a storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A buffer water tank, characterized in that, The buffer tank is provided with a first chamber and a second chamber, as well as a flow control device for controlling the communication between the first chamber and the second chamber. The buffer tank is provided with a first opening and a second opening that connects to the first chamber, and a third opening and a fourth opening that connect to the second chamber. The buffer tank is provided with a first partition and a second partition, which divide the buffer tank into a first chamber, a second chamber, and a third chamber located between the first partition and the second partition. The flow control device includes a first control valve disposed on the first partition and a second control valve disposed on the second partition.

2. A combined heat and power (CHP) system, characterized in that, The combined heat and power system includes: Outdoor heat exchange components; Indoor heat exchange components; and As described in claim 1, the first opening of the buffer water tank is connected to the outlet of the outdoor heat exchange component, the second opening of the buffer water tank is connected to the input end of the indoor heat exchange component, the third opening of the buffer water tank is connected to the inlet of the outdoor heat exchange component, and the fourth opening of the buffer water tank is connected to the output port of the indoor heat exchange component.

3. The multi-generation system according to claim 2, characterized in that, The outdoor heat exchange assembly includes a compressor assembly and a water-side heat exchanger, wherein the water-side heat exchanger includes: A housing, wherein an inlet and an outlet are provided on the housing; and The housing contains a first heat exchanger, a second heat exchanger located on one side of the first heat exchanger, and a third heat exchanger. The first heat exchanger is connected to the refrigerant of the compressor. One end of the second heat exchanger is connected to the water inlet. The other end of the second heat exchanger is connected to one end of the third heat exchanger. The other end of the third heat exchanger is connected to the water outlet.

4. A control method for a combined cooling, heating, and power (CCHP) system, characterized in that, Applied to the multi-generation system as described in any one of claims 2-3, the method comprises: Obtain the target temperature corresponding to the target indoor heat exchanger that performs work in the indoor heat exchange components of the multi-generation system. The target temperature is the target water temperature corresponding to the target indoor heat exchanger or the ambient temperature where the target indoor heat exchanger is located. The flow control parameters of the flow control device in the buffer tank of the multi-generation system are determined based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger. The flow control device is adjusted according to the flow control parameters.

5. The control method for a multi-generation system according to claim 4, characterized in that, The outdoor heat exchange component in the multi-generation system includes a compressor, and a fourth heat exchanger and a first heat exchanger connected to the refrigerant in the compressor. The step of determining the flow control parameters of the flow control device in the buffer tank of the multi-generation system based on the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger includes: Calculate the temperature difference between the target temperature and the set temperature of the target indoor heat exchanger; If the temperature difference value is greater than or equal to the first preset temperature difference threshold, then zero is set as the flow control parameter; If the temperature difference value is less than the first preset temperature difference threshold and greater than the second preset temperature difference threshold, then the preset maximum flow rate value is set as the flow control parameter, wherein the first preset temperature difference threshold is greater than the second preset temperature difference threshold. If the temperature difference value is less than or equal to the second preset temperature difference threshold, the flow control parameters are determined based on the first heat exchange temperature of the first heat exchanger in the multi-generation system, the second heat exchange temperature of the fourth heat exchanger, and the exhaust temperature of the compressor.

6. The control method for a multi-generation system according to claim 5, characterized in that, The step of determining the flow control parameters based on the first heat exchange temperature of the first heat exchanger in the multi-generation system, the second heat exchange temperature of the fourth heat exchanger, and the compressor discharge temperature includes: The first heat exchange temperature of the first heat exchanger, the second heat exchange temperature of the fourth heat exchanger, and the exhaust temperature of the compressor are obtained. The first heat exchange pressure of the first heat exchanger is determined based on the first heat exchange temperature and the exhaust temperature, wherein the first heat exchange pressure is the evaporation pressure or the condensation pressure. The second heat exchange pressure of the fourth heat exchanger is determined based on the second heat exchange temperature and the exhaust temperature, wherein the second heat exchange pressure is the evaporation pressure or the condensation pressure; Based on the relationship between the ratio of the first heat exchange pressure to the second heat exchange pressure and the preset pressure ratio, the flow control parameter is determined to be either the preset maximum flow value or zero.

7. The control method for a multi-generation system according to claim 4, characterized in that, The flow control device includes a first control valve and a second control valve; The process involves adjusting the flow control device according to the flow control parameters. If the flow control parameter is a preset maximum value, then the first control valve and the second control valve are controlled to open; If the flow control parameter is zero, then the first control valve and the second control valve are controlled to close.

8. The control method for a multi-generation system according to claim 4, characterized in that, The indoor heat exchange components in the multi-generation system include at least two indoor heat exchangers connected in parallel. The step of obtaining the target temperature corresponding to the target indoor heat exchanger performing work in the indoor heat exchange components of the multi-generation system includes: If at least two parallel indoor heat exchangers are received, the work priority of each indoor heat exchanger corresponding to the work command is obtained. Determine the target indoor heat exchanger corresponding to the highest work priority among the work priorities, and obtain the heat exchange type of the target indoor heat exchanger; If the heat exchange type of the target indoor heat exchanger is temperature regulation, then obtain the ambient temperature of the environment where the target indoor heat exchanger is located; If the heat exchange type of the target indoor heat exchanger is water temperature regulation, then obtain the target water temperature corresponding to the target indoor heat exchanger.

9. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps in the control method for a combined heat and power system according to any one of claims 4 to 8.

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