Control method, device and equipment of cold and heat dual-supply system and computer readable medium

Abstract

The invention relates to a control method, device and equipment of a cold and heat dual-supply system and a computer readable medium. The method comprises the steps that a header pipe temperature parameter and a single-cooling refrigerating unit load parameter of a system are obtained, and the operation mode of a heat recovery unit is controlled based on the header pipe temperature parameter and the single-cooling refrigerating unit load parameter; if the heat recovery unit is in the heating mode, cold and hot dual temperature supply control is conducted through the single-cold refrigerating unit, a chilled water pump and a cooling water pump in the heat recovery unit and a hot water pump of the heat recovery unit; and if the heat recovery unit is in the refrigeration mode, cold and hot dual-temperature supply control is carried out based on a hot water pump, a chilled water pump and a cooling water pump of the heat recovery unit. According to the air conditioning unit, cold and hot dual-supply temperature control can be achieved when the heat recovery unit is in the refrigerating or heating mode, the operation stability of the heat recovery unit is improved, the recovery efficiency of condensation heat can be improved, and the energy efficiency of the air conditioning unit is improved while environmental pollution is avoided.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a control method, device, equipment and computer-readable medium for a cooling and heating dual supply system. Background Art

[0002] Usually, hotels, guesthouses, restaurants, electronic factories and other construction sites are generally equipped with air conditioning units for cooling, and heating equipment is also required to produce hot water for production, life and sanitation. When the air conditioner is cooling normally, the condensation heat is discharged into the atmosphere in the form of cooling and heat dissipation; at the same time, traditional heating equipment such as coal-fired, oil-fired boilers or electric boilers are generally used to produce hot water, which further consumes a lot of energy. For occasions that require cooling, heating and domestic hot water at the same time, a single cooling or heating system will cause a lot of energy waste, which is not only uneconomical but also causes energy pollution. Therefore, how to optimize the control of the cooling and heating system, improve energy utilization efficiency while protecting the environment, and reduce the energy consumption of the system operation is extremely important.

[0003] In the prior art, a solution is proposed to adjust the condenser outlet temperature through the cooling tower and cooling pump in the air-conditioning unit. However, the unit only uses the cooling load as the control target and cannot adapt to the problem of thermal load fluctuations. In addition, the conventional system only controls with a single target when supplying cooling and heating, and cannot meet the control targets of both working conditions at the same time, resulting in unstable system control. In addition, the air-conditioning unit will emit a large amount of condensation heat, which will cause environmental pollution problems. Therefore, it is very important to improve the recovery efficiency of condensation heat and further improve the energy efficiency of the air-conditioning unit. Summary of the invention

[0004] The present application provides a control method, device, equipment and computer-readable medium for a dual-supply system of cooling and heating to solve the technical problems that the prior art cannot simultaneously meet the control targets of cooling and heating, resulting in poor system control stability and low condensation heat recovery efficiency, resulting in low energy efficiency of the air-conditioning unit.

[0005] According to one aspect of an embodiment of the present application, the present application provides that the dual heat and cold supply system includes at least one single-cold refrigeration unit and a heat recovery unit, and the method includes: obtaining the system's main pipe temperature parameters and the single-cold refrigeration unit load parameters, and controlling the operation mode of the heat recovery unit based on the main pipe temperature parameters and the single-cold refrigeration unit load parameters, and the operation mode includes a heating mode and a cooling mode; if the heat recovery unit is in the heating mode, dual heat and cold supply temperature control is performed through the single-cold refrigeration unit and the chilled water pump and the cooling water pump in the heat recovery unit, and the hot water pump of the heat recovery unit; if the heat recovery unit is in the cooling mode, dual heat and cold supply temperature control is performed based on the hot water pump, chilled water pump and cooling water pump of the heat recovery unit.

[0006] Optionally, the main pipe temperature parameters and the single-cold refrigeration unit load parameters of the system are obtained, and the operation mode of the heat recovery unit is controlled based on the main pipe temperature parameters and the single-cold refrigeration unit load parameters, including: obtaining the main pipe temperature parameters and the single-cold refrigeration unit load parameters of the system, the main pipe temperature parameters include the main refrigeration pipe water supply temperature, the single-cold refrigeration unit load parameters include the single-cold refrigeration unit available amount and the single-cold refrigeration unit operation load rate; judging whether the main refrigeration pipe water supply temperature exceeds the main refrigeration pipe water supply temperature threshold; if the main refrigeration pipe water supply temperature does not exceed the cold If the water supply temperature of the main refrigeration pipe exceeds the water supply temperature threshold of the main refrigeration pipe, the operation mode of the heat recovery unit is controlled according to the available amount of the single-cold refrigeration unit and the operation load rate of the single-cold refrigeration unit; if the water supply temperature of the main refrigeration pipe exceeds the water supply temperature threshold of the main refrigeration pipe, it is determined whether there are any remaining available single-cold refrigeration units based on the available amount of the single-cold refrigeration units; if there are no remaining available single-cold refrigeration units, the operation mode of the heat recovery unit is controlled to the cooling mode; if there are remaining available single-cold refrigeration units, the operation mode of the heat recovery unit is controlled to the heating mode.

[0007] Optionally, the operating mode of the heat recovery unit is controlled according to the available amount of the single-cold refrigeration unit and the operating load rate of the single-cold refrigeration unit, including: judging whether there are remaining available single-cold refrigeration units based on the available amount of the single-cold refrigeration units; if there are no remaining available single-cold refrigeration units, judging whether the operating load rate of the single-cold refrigeration unit exceeds a preset load rate threshold of the single-cold refrigeration unit; if the operating load rate of the single-cold refrigeration unit exceeds the preset load rate threshold, controlling the heat recovery unit to maintain the original operating mode; if there are remaining available single-cold refrigeration units or the operating load rate of the single-cold refrigeration unit does not exceed the preset load rate threshold of the single-cold refrigeration unit, judging whether the current operating mode of the heat recovery unit is the heating mode; if the current operating mode of the heat recovery unit is the heating mode, maintaining the heating mode operation; if the current operating mode of the heat recovery unit is the cooling mode, switching the cooling mode to the heating mode.

[0008] Optionally, the dual temperature control includes single-cold refrigeration unit control, hot water outlet temperature control and heat pump hot water unit control, and the dual temperature control is performed through the single-cold refrigeration unit and the chilled water pump and cooling water pump in the heat recovery unit, as well as the hot water pump of the heat recovery unit, including: if the dual temperature control is controlled by the single-cold refrigeration unit, the chilled water supply and return water temperature difference is controlled by the single-cold refrigeration unit chilled water pump in the system, and the cooling water supply and return water temperature difference is controlled by the cooling water pump of the single-cold refrigeration unit , and control the target outlet temperature setting value of the chilled water through the single-cooling refrigeration unit; if the dual-temperature control of cold and hot water is the hot water outlet temperature control, the chilled water outlet temperature of the chiller is controlled by the chilled water pump of the heat recovery unit, the temperature difference of the hot water main is controlled by the hot water pump of the heat recovery unit, and the cooling water pump of the heat recovery unit in the system is turned off; if the dual-temperature control of cold and hot water is controlled by the heat pump hot water unit, the hot water main temperature is controlled according to the water supply temperature of the hot water main, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit.

[0009] Optionally, the hot water main temperature control based on the hot water main water supply temperature, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit includes: obtaining the hot water main water supply temperature, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit, and judging whether the hot water main temperature exceeds a preset hot water main temperature threshold; if the hot water main water supply temperature exceeds the preset hot water main temperature threshold, judging whether the operating load rate of the heat recovery unit exceeds the preset operating load rate threshold of the heat recovery unit, and judging whether there are remaining available heat recovery units based on the available amount of the heat recovery unit; if the operating load rate of the heat recovery unit exceeds the preset operating load rate threshold of the heat recovery unit and there are no remaining available heat recovery units, starting the heat pump hot water unit in the system to control the hot water main temperature difference; if the hot water main water supply temperature is less than the preset hot water main temperature threshold and the operating load rate of the heat recovery unit is less than the preset operating load rate threshold of the heat recovery unit, shutting down the operation of the heat pump hot water unit in the system.

[0010] Optionally, the hot water pump, chilled water pump and cooling water pump based on the heat recovery unit perform dual hot and cold temperature control, including: controlling the target chilled water outlet temperature setting value by the chilled water pump of the heat recovery unit, and controlling the hot water outlet temperature by the hot water pump of the heat recovery unit and the cooling water pump of the heat recovery unit; judging whether the hot water outlet temperature exceeds a preset hot water outlet temperature threshold; if the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, turning on the cooling water system, and dissipating heat from the heat recovery unit based on the cooling tower in the system; if the hot water outlet temperature is lower than the preset hot water outlet temperature threshold, turning off the cooling water pump of the heat recovery unit.

[0011] Optionally, if the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, the cooling water system is turned on, and the heat recovery unit is discharged heat based on the cooling tower in the system, including: if the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, it is determined whether the cooling water pump of the heat recovery unit is running; if the cooling water pump of the heat recovery unit is running, the cooling water pump of the heat recovery unit is started, and the cooling water bypass valve of the heat recovery unit in the system is opened to control the cooling water outlet temperature of the heat recovery unit to the hot water outlet temperature; if the cooling water pump of the heat recovery unit is not running, it is determined whether the cooling water bypass valve of the heat recovery unit is closed; if the cooling water bypass valve of the heat recovery unit is closed, the cooling water outlet temperature of the heat recovery unit is controlled to be the hot water outlet temperature through the cooling water pump of the heat recovery unit; if the cooling water bypass valve of the heat recovery unit is open, the cooling water outlet temperature of the heat recovery unit is controlled to be the hot water outlet temperature through the cooling water bypass valve of the heat recovery unit.

[0012] According to another aspect of an embodiment of the present application, the present application provides a control device for a dual-supply system of cold and hot air, the device comprising: an acquisition module, for acquiring the main pipe temperature parameters and the single-cold refrigeration unit load parameters of the system, and controlling the operation mode of the heat recovery unit based on the main pipe temperature parameters and the single-cold refrigeration unit load parameters, the operation mode comprising a heating mode and a cooling mode; a first control module, for performing dual-supply control of cold and hot air through the single-cold refrigeration unit and the chilled water pump and the cooling water pump in the heat recovery unit, and the hot water pump of the heat recovery unit if the heat recovery unit is in the heating mode; a second control module, for performing dual-supply control of cold and hot air based on the hot water pump, the chilled water pump and the cooling water pump of the heat recovery unit if the heat recovery unit is in the cooling mode.

[0013] According to another aspect of an embodiment of the present application, the present application provides an electronic device, including a memory, a processor, a communication interface and a communication bus, wherein the memory stores a computer program that can be run on the processor, the memory and the processor communicate through the communication bus and the communication interface, and the processor implements the steps of the control method of the dual heat and cold supply system when executing the computer program.

[0014] According to another aspect of an embodiment of the present application, the present application provides a computer-readable medium having a non-volatile program code executable by a processor, wherein the program code enables the processor to execute the steps of the control method of the dual cooling and heating supply system.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages compared with the related art:

[0016] The present application is applicable to process cold and hot water systems and comfort air conditioning systems that provide both cooling and heating. By analyzing the system's main pipe temperature parameters and the single-cold refrigeration unit load parameters, it is possible to distinguish whether the system's main load is a cold load or a hot load, thereby controlling the operating mode of the heat recovery unit and automatically adjusting the operating conditions of the heat recovery unit, which is beneficial to increasing the system's energy efficiency; by combining the chilled water pump and the cooling water pump of the heat recovery unit to jointly perform hot and cold dual temperature control, it is possible to control the parameters required for cooling in the heating mode and the parameters required for heating in the cooling mode, or in the cooling mode, the parameter target in the other mode can be controlled, thereby improving the operating stability of the heat recovery unit and solving the problem that the heat recovery chiller can only meet the single goal of cold water or hot water control; by controlling the cooling side of the heat recovery unit, it is more conducive to the full recovery of condensation heat, improving the recovery efficiency of condensation heat, and improving the energy efficiency of the air conditioning unit while avoiding environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of the hardware environment of an optional control method for a cold and hot dual supply system provided according to an embodiment of the present application;

[0020] Figure 2 A schematic flow chart of an optional control method for a cold and hot dual supply system provided according to an embodiment of the present application;

[0021] Figure 3 An optional process system schematic diagram of a control method for a cold and hot dual supply system provided in an embodiment of the present application;

[0022] Figure 4 This is an optional flowchart of step S202 provided according to an embodiment of the present application;

[0023] Figure 5 This is an optional flowchart of step S204 provided according to an embodiment of the present application;

[0024] Figure 6 This is an optional flowchart of step S206 provided according to an embodiment of the present application;

[0025] Figure 7 A schematic diagram of an optional control device for a cold and hot dual supply system provided according to an embodiment of the present application;

[0026] Figure 8 A schematic diagram of an optional electronic device structure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] In order to solve the problems mentioned in the background technology, according to one aspect of an embodiment of the present application, an embodiment of a control method for a cold and hot dual supply system is provided.

[0029] like Figure 1 As shown, the control method of the cold and hot dual supply system can be applied to Figure 1 In the hardware environment shown. The system architecture 100 of the hardware environment includes a terminal device 101 and a server 103. The server 103 is connected to the terminal 101 through a network and can be used to provide services for the terminal or a client installed on the terminal. A database 105 can be set on the server or independently of the server to provide data storage services for the server 103. The network can include various connection types, such as wired, wireless communication links or optical fiber cables, etc.

[0030] The user can use the terminal device 101 to interact with the server 103 through the network to receive or send messages, etc. Various communication client applications can be installed on the terminal device 101, such as web browser applications, search applications, instant messaging tools, etc. Among them, the terminal device 101 can be various electronic devices with a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, e-book readers, MP3 players (Moving Picture Experts Group Audio Layer III, dynamic image experts compression standard audio layer 3), MP4 (Moving Picture Experts Group Audio Layer IV, dynamic image experts compression standard audio layer 4) players, laptops and desktop computers, etc. The server 103 can be a server that provides various services, such as a background server that supports the pages displayed on the terminal device 101.

[0031] It should be noted that the control method of the dual-supply system for cooling and heating provided in the embodiment of the present application is generally executed by a server and / or a terminal device, and accordingly, the control device of the dual-supply system for cooling and heating is generally arranged in the server / terminal device. Figure 1 The number of terminal devices, networks and servers in the embodiment is only for illustration. Any number of terminal devices, networks and servers may be provided according to implementation requirements.

[0032] like Figure 2 As shown, Figure 2 A flow chart of a control method for a dual-supply system of cold and hot water provided by an embodiment of the present invention. Taking the control method for a dual-supply system of cold and hot water executed by a server as an example, the control method for a dual-supply system of cold and hot water includes the following steps:

[0033] Step S202, obtaining the system's main pipe temperature parameters and single-cooling refrigeration unit load parameters, and controlling the operation mode of the heat recovery unit based on the main pipe temperature parameters and single-cooling refrigeration unit load parameters, the operation mode including a heating mode and a cooling mode.

[0034] In this embodiment, the control method of the cold and hot dual supply system provided by the present application is applicable to a process cold and hot water system and a comfort air conditioning system that simultaneously supplies cold and hot water. The cold and hot dual supply system includes a refrigeration unit, a heat recovery unit and an auxiliary heat source, wherein the refrigeration unit includes a single cold refrigeration unit, and the auxiliary heat source may include a heat pump hot water unit, solar energy, a boiler and other heat sources. The cold and hot dual supply system provided by this embodiment includes at least one single cold refrigeration unit and a heat recovery unit. The following description is based on the cold and hot dual supply system including a single cold refrigeration unit and a heat recovery unit.

[0035] like Figure 3 As shown, Figure 3 An optional process system schematic diagram of the control method of the cold and hot dual supply system provided in this embodiment. Figure 3In: QT1 indicates cooling tower, QT2 indicates heat source tower, T1 indicates cooling tower outlet water temperature sensor, T2 indicates heat source tower outlet water temperature sensor, T3 indicates cooling water outlet water temperature sensor of single cooling refrigeration unit, T4 indicates cooling water outlet water temperature sensor of heat recovery unit, T5 indicates evaporator outlet water temperature sensor of heat pump hot water unit, T6 indicates chiller outlet water temperature sensor of single cooling chiller, T7 indicates chiller outlet water temperature sensor of heat recovery unit, T8 indicates condenser outlet water temperature sensor of heat pump hot water unit, T9 indicates chiller main pipe supply water temperature sensor, T10 indicates chiller main pipe return water temperature sensor , T11 represents the water supply temperature sensor of the hot water main, T12 represents the return water temperature sensor of the hot water main, T13 represents the hot water outlet temperature sensor of the heat recovery unit, F1 represents the cooling water bypass valve of the heat recovery unit, P1 represents the cooling water pump of the single-cold refrigeration unit, P2 represents the cooling water pump of the heat recovery unit, P3 represents the evaporation side water pump of the heat pump hot water unit, P4 represents the freezing water pump of the single-cold refrigeration unit, P5 represents the freezing water pump of the heat recovery unit, P6 represents the hot water pump of the heat recovery unit, P7 represents the condensation side water pump of the heat pump hot water unit, S1 represents the single-cold refrigeration unit, S2 represents the heat recovery unit, and S3 represents the heat pump hot water unit.

[0036] The cooling side of the single-cold refrigeration unit S1 and the cooling side of the heat recovery unit S2 are connected to the cooling tower QT1; the freezing side of the single-cold refrigeration unit S1 and the freezing side of the heat recovery unit S2 are connected to the chilled water supply and return main, that is, one end where the chilled water supply temperature sensor T9 and the chilled water return temperature sensor T10 are located; the hot water side of the heat recovery unit S2 and the hot water side of the heat pump hot water unit S3 are connected to the hot water supply main, that is, one end where the hot water supply temperature sensor T11 and the hot water return temperature sensor T12 are located. The installation positions of each temperature sensor, water pump, and bypass valve are as follows: Figure 3 As shown, the cooling water pump and the evaporation side water pump of the heat pump hot water unit in the system adopt conventional fixed temperature difference control or fixed pressure difference control. Of course, other control methods can also be used. For example: the cooling water pump is controlled by the condensing temperature control method, the cooling water temperature proximity control method, the temperature difference control method based on the control curve, etc.; the evaporation side water pump of the heat pump hot water unit is controlled according to the inlet and outlet water temperature difference of the evaporator or the outlet water temperature, and an intelligent control system is adopted to automatically adjust the operating state of the water pump according to the actual operation of the system and changes in the external environment.

[0037] In this embodiment, the operation modes of the heat recovery unit include heating mode and cooling mode. The heating mode of the heat recovery unit includes: a single-cold chiller control mode, a heat recovery unit control with hot water outlet temperature control, and a heat pump unit control mode.

[0038] In the present embodiment, the above-mentioned main pipe temperature parameter may refer to the temperature of the chilled water supply and return water main pipe, which may be obtained through the chilled water supply temperature sensor T9. The above-mentioned single-cold refrigeration unit load parameters may include the number of available single-cold refrigeration units, the operating load rate, etc., which may be read through the background of the server, and the background may be the control center of the entire system. The system generates cold load and heat load at the same time, and the current operating mode of the system may be comprehensively judged by comparing the cold load and the heat load of the system to determine whether it is mainly cold load or heat load. In the present embodiment, the operating mode of the heat recovery unit may be controlled specifically according to the main pipe temperature parameters and the single-cold refrigeration unit load parameters to determine whether the current heat recovery unit is in heating mode or cooling mode.

[0039] Step S204, if the heat recovery unit is in the heating mode, dual temperature control of hot and cold is performed through the chilled water pump and cooling water pump in the single-cooling refrigeration unit and the heat recovery unit, and the hot water pump of the heat recovery unit.

[0040] In this embodiment, when the hot water unit is in heating mode, hot and cold dual temperature control can be performed based on the chilled water pump and cooling water pump in the single-cooling refrigeration unit and the heat recovery unit. Among them, the chilled water pump and the cooling water pump are both water circulation pumps, which are divided into chilled water pumps and cooling water pumps only because they are arranged at different positions of the machine room pipeline.

[0041] Furthermore, there are three control modes in the heating mode, including the control of chilled water and cooling water through the cooling water pump of the single-cold refrigeration unit and the chilled water pump of the single-cold refrigeration unit; the control of the heat recovery unit with the hot water outlet temperature control, specifically including the heat recovery unit chilled water control of the single-cold refrigeration unit, the heat recovery unit hot water pump temperature control of the hot water main, and the heat recovery unit cooling water control; the heat pump unit control method, specifically the hot water main temperature control. Based on the above three control methods in the heating mode, dual heating and cooling can be achieved at the same time, that is, the supply of cold water and hot water at the same time, which is more flexible and practical, and solves the problem that the existing heat recovery chiller can only meet the single goal of cold water and hot water supply.

[0042] Step S206: If the heat recovery unit is in the cooling mode, hot and cold dual temperature supply control is performed based on the hot water pump, chilled water pump and cooling water pump of the heat recovery unit.

[0043] In this embodiment, when the heat recovery unit is currently in the cooling mode, the control mode of the heat recovery unit is the chilled water outlet temperature control, which specifically includes three situations: chilled water supply and return water temperature control based on the chilled water pump of the heat recovery unit, chilled water target outlet temperature control based on the hot water pump of the heat recovery unit, and hot water outlet temperature auxiliary control based on the cooling water pump of the heat recovery unit. In the cooling mode, in the cooling control of the single-cold refrigeration unit, the chilled water supply and return water temperature difference is controlled based on the chilled water pump of the single-cold refrigeration unit, and the chilled water supply and return water temperature difference can be calculated based on the temperature collected by the freezing main pipe supply water temperature sensor T9 and the freezing main pipe return water temperature sensor T10. In the cooling mode, the cooling water pump of the single-cold refrigeration unit controls the cooling water supply and return water temperature difference, and the cooling water supply and return water temperature difference can be calculated based on the temperature collected by the cooling water outlet temperature sensor T4 of the heat recovery unit and the cooling tower outlet water temperature sensor T1. Based on the control mode under the above cooling mode, both hot and cold temperature supply can be achieved at the same time, which is more flexible and practical.

[0044] In the embodiment of the present invention, by analyzing the main pipe temperature parameters of the system and the load parameters of the single-cold refrigeration unit, it is possible to distinguish whether the main load of the system is a cold load or a hot load, thereby controlling the operating mode of the heat recovery unit and automatically adjusting the operating conditions of the heat recovery unit, which is beneficial to increasing the energy efficiency of the system; by combining the chilled water pump and the cooling water pump of the heat recovery unit to jointly perform hot and cold dual temperature control, it is possible to control the parameters required for refrigeration in the heating mode and the parameters required for heating in the cooling mode, or in the cooling mode, the parameter target of the other mode can be controlled, thereby improving the operating stability of the heat recovery unit and solving the problem that the heat recovery chiller can only meet the single goal of cold water or hot water control; by controlling the cooling side of the heat recovery unit, it is more conducive to the full recovery of condensation heat, improving the recovery efficiency of condensation heat, and improving the energy efficiency of the air-conditioning unit while avoiding environmental pollution.

[0045] In an optional embodiment, in combination Figure 4 As shown, the above step S202 specifically includes:

[0046] Obtaining the system's main pipe temperature parameters and single-cold refrigeration unit load parameters, wherein the main pipe temperature parameters include the freezing main pipe water supply temperature, and the single-cold refrigeration unit load parameters include the single-cold refrigeration unit available capacity and the single-cold refrigeration unit operating load rate;

[0047] Determining whether the main refrigeration pipe water supply temperature exceeds the main refrigeration pipe water supply temperature threshold;

[0048] If the main refrigeration pipe water supply temperature does not exceed the main refrigeration pipe water supply temperature threshold, the operation mode of the heat recovery unit is controlled according to the available capacity of the single-cold refrigeration unit and the operation load rate of the single-cold refrigeration unit;

[0049] If the main freezing pipe water supply temperature exceeds the main freezing pipe water supply temperature threshold, determining whether there are any remaining available single-cooling refrigeration units based on the available amount of the single-cooling refrigeration units;

[0050] If there is no remaining available cooling-only refrigeration unit, controlling the operation mode of the heat recovery unit to be the cooling mode;

[0051] If there are the remaining available cooling-only refrigeration units, the operation mode of the heat recovery unit is controlled to be the heating mode.

[0052] In this embodiment, the main pipe temperature parameter may include the refrigeration main pipe water supply temperature, the refrigeration main pipe return water temperature, the hot water main pipe water supply temperature, and the hot water main pipe return water temperature. In this embodiment, the main pipe temperature parameter used for judgment is the refrigeration main pipe water supply temperature, which can be collected by the refrigeration main pipe water supply temperature sensor T9.

[0053] In this embodiment, the above-mentioned single-cold refrigeration unit load parameters may include cooling capacity, energy consumption, energy consumption ratio, compressor frequency, performance coefficient, single-cold refrigeration unit available quantity and single-cold refrigeration unit operating load rate, etc. In this embodiment, the single-cold refrigeration unit compliance parameters used for judgment are the single-cold refrigeration unit available quantity and the single-cold refrigeration unit operating load rate. The single-cold refrigeration unit available quantity refers to the number of single-cold refrigeration units currently available, and the single-cold refrigeration unit operating load rate may refer to the ratio of the load borne during actual operation to the rated load. The data of the single-cold refrigeration unit available quantity and the single-cold refrigeration unit operating load rate can be obtained based on the background.

[0054] As an optional embodiment, by comparing the main chilled water supply temperature with the main chilled water supply temperature threshold (chilled water outlet temperature setting value Td + deviation value △T1), when the main chilled water supply temperature ≤ the main chilled water supply temperature threshold, it is impossible to judge which of the cold and hot water loads is the main control target based solely on the main chilled water supply temperature. It is further necessary to make a judgment based on the available amount of the single-cold refrigeration unit and the operating load rate of the single-cold refrigeration unit.

[0055] As another optional embodiment, when the freezing main water supply temperature is greater than the freezing main water supply temperature threshold, it means that the current cold water load does not meet the standard, and further judgment needs to be made in combination with the available number of single-cold refrigeration units. When the number of available single-cold refrigeration units = 0, it means that the current system operation state is mainly based on the cold water load, and the heat recovery unit mode is switched to the cooling mode, so that the heat recovery unit working mode is changed to cooling. At this time, the cooling load is mainly used. If it is currently in cooling mode, the cooling mode is maintained to continue to operate. When the number of available single-cold refrigeration units is greater than 0, the current operating mode of the heat recovery unit is obtained. If it is in heating mode, the heating mode is maintained to continue to operate; if it is in cooling mode, the cooling mode is switched to heating mode.

[0056] It should be noted that the above-mentioned chilled water outlet temperature setting value Td and deviation value △T1 are actually related to the project of the application scenario. The value range of Td is 1 to 15°C, and the specific value needs to be set according to the project type and application site; the deviation value △T1 is the system automatic control deviation value to prevent frequent control of the control system.

[0057] In this embodiment, the operation mode is judged and controlled in combination with the water supply temperature of the freezing main, the available capacity of the single-cold refrigeration unit and the operating load rate of the single-cold refrigeration unit to distinguish whether the current main load of the system is a cold load or a hot load, so as to accurately control the operation mode of the heat recovery unit according to the load conditions of the system, and automatically adjust the operating conditions of the heat recovery unit, which is beneficial to increasing the energy efficiency of the system.

[0058] In an optional embodiment, in combination Figure 3 As shown, the operation mode of the heat recovery unit is controlled according to the available amount of the single-cooling refrigeration unit and the operation load rate of the single-cooling refrigeration unit, including:

[0059] Determining whether there are any remaining available cooling-only refrigeration units based on the available quantity of the cooling-only refrigeration units;

[0060] If there is no remaining available cooling-only refrigeration unit, determining whether the operating load rate of the cooling-only refrigeration unit exceeds a preset load rate threshold of the cooling-only refrigeration unit;

[0061] If the operating load rate of the single-cooling refrigeration unit exceeds the preset load rate threshold, the heat recovery unit is controlled to maintain the original operating mode;

[0062] If there is the remaining available cooling-only refrigeration unit or the operating load rate of the cooling-only refrigeration unit does not exceed the preset load rate threshold of the cooling-only refrigeration unit, determining whether the current operating mode of the heat recovery unit is the heating mode;

[0063] If the current operation mode of the heat recovery unit is the heating mode, maintaining the heating mode operation;

[0064] If the current operation mode of the heat recovery unit is the cooling mode, the cooling mode is switched to the heating mode.

[0065] As an optional embodiment, when the freezing main water supply temperature is ≤ the freezing main water supply temperature threshold, and there are no remaining available single-cold refrigeration units (remaining available single-cold refrigeration units = 0), it can be determined whether the operating load rate of the single-cold refrigeration unit exceeds the single-cold refrigeration unit preset load rate threshold. Among them, the single-cold refrigeration unit preset load rate threshold can be set in combination with actual conditions, for example, the single-cold refrigeration unit preset load rate threshold is 80%. When the single-cold refrigeration unit preset load rate threshold> the single-cold refrigeration unit preset load rate threshold, the original operation mode is maintained unchanged, indicating that the current single-cold refrigeration unit can still carry more load.

[0066] As another optional embodiment, when the remaining available single-cold refrigeration units are greater than 0, it means that the system cooling load still has some space to reach the load you want to reach. At this time, the heat recovery unit is transferred to the heating mode, that is, more heat generated by cooling is transferred to hot water, increasing the system operation energy efficiency. Or when the single-cold refrigeration unit operation load rate is less than the single-cold refrigeration unit preset load rate threshold, it can be said that the system cooling load has some space to reach the load you want to reach. At this time, the heat recovery unit is controlled to operate in the heating mode. If it is currently in the heating mode, it can be maintained.

[0067] In this embodiment, the operation mode is judged by combining the water supply temperature of the freezing main, the available capacity of the single-cold refrigeration unit and the operating load rate of the single-cold refrigeration unit. It is possible to distinguish whether the system is currently dominated by cooling load or heating load, and then accurately control the operation mode of the heat recovery unit, automatically adjust the operating conditions of the heat recovery unit, which is beneficial to increase the energy efficiency of the system.

[0068] In an optional embodiment, in combination Figure 5 As shown, the above step S204 includes:

[0069] If the hot and cold dual temperature control is controlled by the single-cold refrigeration unit, the supply and return temperature difference of the chilled water is controlled by the chilled water pump of the single-cold refrigeration unit in the system, the supply and return temperature difference of the cooling water is controlled by the cooling water pump of the single-cold refrigeration unit, and the target outlet temperature setting value of the chilled water is controlled by the single-cold refrigeration unit;

[0070] If the hot and cold dual temperature control is the hot water outlet temperature control, the chilled water outlet temperature of the chiller is controlled by the heat recovery unit chilled water pump, the hot water main temperature difference is controlled by the heat recovery unit hot water pump, and the heat recovery unit cooling water pump in the system is turned off;

[0071] If the hot and cold dual temperature control is controlled by the heat pump hot water unit, the hot water main temperature control is performed according to the hot water main water supply temperature, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit.

[0072] In this embodiment, the hot and cold dual temperature supply control includes the cold-only refrigeration unit control, the hot water outlet temperature control and the heat pump hot water unit control.

[0073] In some embodiments, for the control of the single-cold refrigeration unit, the single-cold refrigeration unit controls the chilled water pump to control the chilled water supply and return water temperature difference, and the single-cold refrigeration unit controls the cooling water pump to control the cooling water supply and return water temperature difference. Among them, the chilled water supply and return water temperature difference = the chilled water supply temperature collected by the freezing main pipe supply water temperature sensor T9 - the chilled water return water temperature collected by the freezing main pipe return water temperature sensor T10; the cooling water supply and return water temperature difference = the cooling water outlet water temperature collected by the cooling water outlet water temperature sensor T3 of the single-cold refrigeration unit - the cooling water outlet water temperature collected by the cooling tower outlet water temperature sensor T1. In addition, the chilled water outlet water temperature setting value Td is also controlled by the single-cold refrigeration unit.

[0074] Furthermore, the control pipeline of the single-cold refrigeration unit is: single-cold refrigeration unit S1-single-cold chiller chilled water outlet temperature sensor T6-cold main pipe water supply temperature sensor T9-cold main pipe return water temperature sensor T10-single-cold refrigeration unit chilled water pump P4-single-cold refrigeration unit cooling water outlet temperature sensor T3-cooling tower QT1-cooling tower outlet water temperature sensor T1-single-cold refrigeration unit cooling water pump P1.

[0075] In this embodiment, the temperature difference is an important parameter that reflects the change in system load. When the system load increases, the temperature difference will increase; when the load decreases, the temperature difference will decrease. In order to achieve stable operation and energy-saving effects of the system, it is necessary to adjust the water pump frequency according to the change in temperature difference. When the temperature difference increases, it means that the system needs more cooling water flow to take away the heat. At this time, the water pump frequency should be increased to increase the flow; when the temperature difference decreases, the water pump frequency can be appropriately reduced to reduce the flow. Therefore, the above-mentioned control of the temperature difference by the water pump is actually the process of adjusting the water pump frequency, that is, the temperature difference control is achieved by adjusting the water pump frequency.

[0076] In other embodiments, for hot water outlet temperature control, the chilled water outlet temperature Td′ of the chiller can be controlled by the chilled water pump of the heat recovery unit, the hot water main temperature difference can be controlled by the hot water pump of the heat recovery unit, and the heat recovery unit cooling water pump in the system can be turned off at the same time. Wherein, the hot water main temperature difference = the hot water main return water temperature collected by the hot water main return water temperature sensor T12 - the hot water main supply water temperature collected by the hot water main supply water temperature sensor T11.

[0077] Furthermore, the hot water outlet temperature is controlled by the control pipeline of the hot water outlet temperature control method as follows: heat recovery unit S2-heat recovery unit chilled water outlet temperature sensor T7-chilled main pipe supply temperature sensor T9-chilled main pipe return water temperature sensor T10-heat recovery unit chilled water pump P5-heat recovery unit hot water outlet temperature sensor T13-hot water supply main pipe temperature sensor T11-hot water main pipe return water temperature sensor T12-heat recovery unit hot water pump P6.

[0078] In other embodiments, the heat pump hot water unit is controlled, and the temperature of the hot water main can be controlled according to the water supply temperature of the hot water main, the available amount of the heat recovery unit, and the operating load rate of the heat recovery unit. The heat pump hot water unit is used as a heating auxiliary of the heat recovery unit, and the heat pump hot water unit is turned on only when the heat recovery unit does not meet the heating load; otherwise, the heat pump hot water unit does not operate.

[0079] As a possible implementation method, PID (Proportional-Integral-Derivative) is a feedback-based control algorithm that continuously adjusts the output of the controller to maintain the state of the controlled object near the set value, thereby achieving stable and accurate automatic control. In the control process of the control method of the hot and cold dual supply system provided in the present application, each water pump adjustment can be controlled by PID. The PID control can dynamically adjust the frequency of the water pump according to the change in temperature difference, thereby accurately controlling the water temperature in each pipeline and accurately achieving hot and cold water temperature control. In this embodiment, each temperature difference can be controlled within 5°C. Of course, the temperature difference in each control mode can also be set separately based on different scenarios, needs, etc., and no unique limitation is made here.

[0080] In this embodiment, through the control of the single-cold refrigeration unit, the hot water outlet temperature control and the heat pump hot water unit control, the cold water and hot water supply can be accurately controlled according to different situations, thereby controlling the operation of the heat recovery unit and automatically adjusting the operating conditions of the heat recovery unit, which is beneficial to increasing the system energy efficiency.

[0081] In an optional embodiment, in combination Figure 5 As shown, the above-mentioned hot water main temperature control according to the hot water main water supply temperature, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit includes:

[0082] Obtaining the water supply temperature of the hot water main, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit, and determining whether the hot water main temperature exceeds a preset hot water main temperature threshold;

[0083] If the supply water temperature of the hot water main pipe exceeds the preset hot water main pipe temperature threshold, determine whether the operating load rate of the heat recovery unit exceeds the preset operating load rate threshold of the heat recovery unit, and determine whether there is a remaining available heat recovery unit according to the available amount of the heat recovery unit;

[0084] If the operating load rate of the heat recovery unit exceeds the preset operating load rate threshold of the heat recovery unit and there is no remaining available heat recovery unit, turn on the heat pump water heater in the system to control the temperature difference of the hot water main pipe;

[0085] If the supply water temperature of the hot water main pipe is less than the preset hot water main pipe temperature threshold and the operating load rate of the heat recovery unit is less than the preset operating load rate threshold of the heat recovery unit, turn off the operation of the heat pump water heater in the system.

[0086] In this embodiment, the supply water temperature of the hot water main pipe can be collected by the hot water main pipe supply water temperature sensor T11, and the available amount of the heat recovery unit and the operating load rate of the heat recovery unit can be obtained from the background.

[0087] In some embodiments, when the supply water temperature of the hot water main pipe > the preset hot water main pipe temperature threshold (the hot water temperature setting value Tr + the deviation value △T2), it means that the supply water temperature of the hot water main pipe exceeds the standard. Among them, the preset hot water main pipe temperature threshold can be set to 80%. If the current load rate of the heat recovery unit > the preset operating load rate threshold of the heat recovery unit, and the available amount of the heat recovery unit = 0, it means that the heat load generated by the heat recovery unit is not enough to meet the heat load demand of the current system. At this time, turn on the operation of the heat pump water heater, and control the temperature difference of the hot water main pipe based on the hot water side circulation pump of the heat pump water heater. Among them, the hot water side circulation pump of the heat pump water heater includes the evaporation side water pump P3 of the heat pump water heater and the condensation side water pump P7 of the heat pump water heater.

[0088] In some other possible embodiments, when the supply water temperature of the hot water main pipe < Tr - △T2, and the operating load rate of the heat recovery unit < the preset operating load rate threshold of the heat recovery unit, it means that the load of the heat recovery unit is sufficient to meet the hot water load of the current system operation. At this time, turn off the operation of the heat pump water heater. Among them, it is related to the actual operation parameters of the project. Among them, the general applicable range of Tr is 30 - 50°C, and it can also exceed 50°C. Specifically, it can be determined according to different scenarios, requirements, etc. △T2 is the allowable error range of the hot water supply temperature.

[0089] Further, the corresponding control pipeline for the heat pump water heater is: heat pump water heater S3 - condenser outlet temperature sensor T8 of the heat pump water heater - hot water supply main pipe temperature sensor T11 - hot water main pipe return water temperature sensor T12 - condensation side water pump P7 of the heat pump water heater - evaporator outlet temperature sensor T5 of the heat pump water heater - heat source tower QT2 - heat source tower outlet temperature sensor T2 - evaporation side water pump P3 of the heat pump water heater.

[0090] In this embodiment, it is comprehensively judged whether the heat load generated by the heat recovery unit meets the heat load demand of the current system based on the water supply temperature of the hot water main, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit. The start and stop of the heat pump hot water unit is accurately controlled according to the supply and demand of the heat load, which is conducive to supplementing the heat supply to meet the heating demand when the heat load is in short supply, and to shut down the heat pump hot water unit in time when the heat load supply and demand are balanced, thereby reducing energy consumption.

[0091] In an optional embodiment, in combination Figure 6 As shown, the above step S206 includes:

[0092] The target outlet temperature of chilled water is controlled by the chilled water pump of the heat recovery unit, and the outlet temperature of hot water is controlled by the hot water pump of the heat recovery unit and the cooling water pump of the heat recovery unit;

[0093] Determining whether the hot water outlet temperature exceeds a preset hot water outlet temperature threshold;

[0094] If the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, the cooling water system is turned on to discharge heat from the heat recovery unit based on the cooling tower in the system;

[0095] If the hot water outlet temperature is lower than the preset hot water outlet temperature threshold, the cooling water pump of the heat recovery unit is turned off.

[0096] In this embodiment, when the heat recovery unit is in the cooling mode, the refrigeration control of the refrigeration unit is adopted, including controlling the chilled water supply and return water temperature difference by the heat recovery unit chilled water pump, controlling the cooling water supply and return water temperature difference by the heat recovery unit cooling water pump, controlling the chilled water outlet temperature set value Td by the heat recovery unit chilled water pump, controlling the hot water outlet temperature Tr by the heat recovery unit hot water pump, and auxiliary control of the hot water outlet temperature Tr by the heat recovery unit cooling water pump to ensure that the hot water outlet temperature is maintained within the required range.

[0097] Furthermore, when the hot water outlet temperature is assisted by the cooling water pump of the heat recovery unit, the hot water outlet temperature control process is as follows: by comparing the hot water outlet temperature with the preset hot water outlet temperature threshold, when the hot water outlet temperature is greater than Tr+△T3, the cooling water system is turned on to discharge heat from the heat recovery unit based on the cooling tower in the system. If the hot water outlet temperature is less than Tr-△T3, it is determined whether the cooling water bypass valve F1 of the heat recovery unit is closed. If F1 is closed, the original operation mode is maintained; if F1 is not closed, the cooling water pump of the heat recovery unit is turned off.

[0098] In this embodiment, in the refrigeration mode, the cooling side outlet water temperature is controlled by combining the heat recovery unit cooling water pump, the heat recovery unit hot water pump and the heat recovery unit chilled water pump, which is beneficial to the complete recovery of condensation heat. When the heat discharge of the heat recovery unit is greater than the heat load of the hot water system, the heat recovery unit cooling water pump and the heat recovery unit cooling water bypass valve are controlled to ensure the condensing pressure of the condenser at this time, thereby ensuring that the hot water outlet temperature of the heat recovery unit more accurately meets the heat load requirements.

[0099] In an optional embodiment, in combination Figure 6 As shown, if the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, the cooling water system is turned on, and the heat recovery unit is discharged based on the cooling tower in the system, specifically including:

[0100] If the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, determining whether the cooling water pump of the heat recovery unit is running;

[0101] If the cooling water pump of the heat recovery unit is running, start the cooling water pump of the heat recovery unit, and open the cooling water bypass valve of the heat recovery unit in the system to control the cooling water outlet temperature of the heat recovery unit to be the hot water outlet temperature;

[0102] If the cooling water pump of the heat recovery unit is not running, determining whether the cooling water bypass valve of the heat recovery unit is closed;

[0103] If the cooling water bypass valve of the heat recovery unit is closed, the cooling water outlet temperature of the heat recovery unit is controlled by the cooling water pump of the heat recovery unit to be the hot water outlet temperature;

[0104] If the cooling water bypass valve of the heat recovery unit is opened, the cooling water outlet temperature of the heat recovery unit is controlled by the cooling water bypass valve of the heat recovery unit to be the hot water outlet temperature.

[0105] In this embodiment, when the hot water outlet temperature is greater than Tr+△T3, it means that when the heat recovery unit is working, the heat taken away by the hot water cannot meet the heat dissipation generated by the unit during refrigeration. Therefore, the cooling water system should be turned on at this time to discharge the excess heat generated by the unit through the cooling tower. To this end, it is necessary to first detect whether the cooling water pump of the heat recovery unit is running. When it is running, the cooling water pump of the heat recovery unit is started, the frequency of the cooling water pump of the heat recovery unit is the default frequency, and the cooling water bypass valve of the heat recovery unit is opened at the same time, the valve opening is fully open, and the cooling water outlet temperature T4 is controlled to be the hot water outlet temperature Tr.

[0106] Furthermore, if the cooling water pump of the heat recovery unit is already running, it is determined whether the valve is in a closed state. If the valve is closed, the control target of the cooling water pump of the heat recovery unit is switched to controlling the cooling water outlet temperature T4 to the hot water outlet temperature Tr, and re-enters the hot water outlet temperature judgment process after a delay of t; if the valve is open, the frequency of the cooling water pump of the heat recovery unit is kept at the default frequency, and the control target of the valve is to control the cooling water outlet temperature T4 to the hot water outlet temperature Tr, and re-enters the hot water outlet temperature judgment process after a delay of t.

[0107] Furthermore, the control pipeline in the cooling mode is: heat recovery unit S2-heat recovery unit chilled water outlet temperature sensor T7-chilled main pipe supply temperature sensor T9-chilled main pipe return water temperature sensor T10-heat recovery unit chilled water pump P5-heat recovery unit cooling water outlet temperature sensor T4-cooling tower QT1-cooling tower outlet temperature sensor T1-heat recovery unit cooling water pump P2-heat recovery unit cooling water bypass valve F1.

[0108] In this embodiment, the control of the cooling side of the heat recovery unit is beneficial to the complete recovery of condensation heat. When the heat rejection of the heat recovery unit is greater than the heat load of the hot water system, the cooling water pump and the bypass valve are controlled to ensure the condensation pressure of the condenser at this time, thereby ensuring the hot water outlet temperature of the heat recovery unit.

[0109] According to another aspect of the embodiment of the present application, Figure 7 As shown, a control device for a cold and hot dual supply system is provided, and the device 700 includes:

[0110] An acquisition module 701 is used to acquire a main pipe temperature parameter and a single cooling refrigeration unit load parameter of the system, and control an operation mode of the heat recovery unit based on the main pipe temperature parameter and the single cooling refrigeration unit load parameter, wherein the operation mode includes a heating mode and a cooling mode;

[0111] The first control module 703 is used to perform hot and cold dual temperature control through the chilled water pump and the cooling water pump in the single-cold refrigeration unit and the heat recovery unit, and the hot water pump of the heat recovery unit if the heat recovery unit is in the heating mode;

[0112] The second control module 705 is used to perform hot and cold dual temperature control based on the hot water pump, chilled water pump and cooling water pump of the heat recovery unit if the heat recovery unit is in the cooling mode.

[0113] It should be noted that, in this embodiment, the acquisition module 701 can be used to execute step S202 in the embodiment of the present application, the first control module 703 in this embodiment can be used to execute step S204 in the embodiment of the present application, and the second control module 705 in this embodiment can be used to execute step S206 in the embodiment of the present application.

[0114] It should be noted that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the above modules as part of the device can be run in Figure 1 In the hardware environment shown, it can be implemented by software or by hardware.

[0115] It should be noted here that the suffixes such as module, component, unit, sub-module, and sub-unit used to represent elements described in the above device are only for the convenience of description of this application and have no specific meaning in themselves. Therefore, they can be used in combination.

[0116] According to another aspect of the embodiments of the present application, the present application provides an electronic device, such as Figure 8 As shown, it includes a memory 801, a processor 803, a communication interface 805 and a communication bus 807. The memory 801 stores a computer program that can be run on the processor 803. The memory 801 and the processor 803 communicate through the communication interface 805 and the communication bus 807. When the processor 803 executes the computer program, the steps of the control method of the above-mentioned dual-supply system are implemented.

[0117] The memory and processor in the above electronic device communicate via a communication bus and a communication interface. The communication bus may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus may be divided into an address bus, a data bus, a control bus, etc.

[0118] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0119] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0120] According to another aspect of the embodiments of the present application, a computer program product or a computer program is provided, the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps of the control method of the dual-supply system of cooling and heating in any of the above embodiments.

[0121] Optionally, in an embodiment of the present application, a computer-readable medium is configured to store program code for the processor to execute each step in the control method for the dual cooling and heating supply system.

[0122] Optionally, the specific examples in this embodiment can refer to the examples described in the above embodiments, and this embodiment will not be repeated here. And when the embodiments of this application are specifically implemented, they can refer to the above embodiments and have corresponding technical effects.

[0123] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application, or a combination thereof.

[0124] For software implementation, the technology described herein can be implemented by a unit that performs the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0125] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0126] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0127] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0128] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0129] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0130] It should be noted that, in this article, relational terms such as first, second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms include, include or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0131] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A control method for a cold and hot dual supply system, characterized in that: The dual-supply system for cooling and heating includes at least one cooling unit and a heat recovery unit, and the method includes: Obtaining a main pipe temperature parameter and a single-cooling refrigeration unit load parameter of the system, and controlling an operation mode of the heat recovery unit based on the main pipe temperature parameter and the single-cooling refrigeration unit load parameter, wherein the operation mode includes a heating mode and a cooling mode; If the heat recovery unit is in the heating mode, dual temperature control is performed through the chilled water pump and cooling water pump in the single-cooling refrigeration unit and the heat recovery unit, and the hot water pump of the heat recovery unit; If the heat recovery unit is in the cooling mode, hot and cold dual temperature supply control is performed based on the hot water pump, chilled water pump and cooling water pump of the heat recovery unit.

2. The method according to claim 1, characterized in that Obtaining the main pipe temperature parameter and the single-cold refrigeration unit load parameter of the system, and controlling the operation mode of the heat recovery unit based on the main pipe temperature parameter and the single-cold refrigeration unit load parameter, including: Obtaining the system's main pipe temperature parameters and single-cold refrigeration unit load parameters, wherein the main pipe temperature parameters include the freezing main pipe water supply temperature, and the single-cold refrigeration unit load parameters include the single-cold refrigeration unit available capacity and the single-cold refrigeration unit operating load rate; Determining whether the main refrigeration pipe water supply temperature exceeds the main refrigeration pipe water supply temperature threshold; If the main refrigeration pipe water supply temperature does not exceed the main refrigeration pipe water supply temperature threshold, the operation mode of the heat recovery unit is controlled according to the available capacity of the single-cold refrigeration unit and the operation load rate of the single-cold refrigeration unit; If the main freezing pipe water supply temperature exceeds the main freezing pipe water supply temperature threshold, determining whether there are any remaining available single-cooling refrigeration units based on the available amount of the single-cooling refrigeration units; If there is no remaining available cooling-only refrigeration unit, controlling the operation mode of the heat recovery unit to be the cooling mode; If there are the remaining available cooling-only refrigeration units, the operation mode of the heat recovery unit is controlled to be the heating mode.

3. The method according to claim 2, characterized in that The controlling the operation mode of the heat recovery unit according to the available amount of the single-cooling refrigeration unit and the operation load rate of the single-cooling refrigeration unit includes: Determining whether there are any remaining available cooling-only refrigeration units based on the available quantity of the cooling-only refrigeration units; If there is no remaining available cooling-only refrigeration unit, determining whether the operating load rate of the cooling-only refrigeration unit exceeds a preset load rate threshold of the cooling-only refrigeration unit; If the operating load rate of the single-cooling refrigeration unit exceeds the preset load rate threshold, the heat recovery unit is controlled to maintain the original operating mode; If there is the remaining available cooling-only refrigeration unit or the operating load rate of the cooling-only refrigeration unit does not exceed the preset load rate threshold of the cooling-only refrigeration unit, determining whether the current operating mode of the heat recovery unit is the heating mode; If the current operation mode of the heat recovery unit is the heating mode, maintaining the heating mode operation; If the current operation mode of the heat recovery unit is the cooling mode, the cooling mode is switched to the heating mode.

4. The method according to claim 1, characterized in that: The dual temperature control includes single-cold refrigeration unit control, hot water outlet temperature control and heat pump hot water unit control. The dual temperature control is performed by the single-cold refrigeration unit and the chilled water pump and cooling water pump in the heat recovery unit, and the hot water pump of the heat recovery unit, including: If the hot and cold dual temperature control is controlled by the single-cold refrigeration unit, the supply and return temperature difference of the chilled water is controlled by the chilled water pump of the single-cold refrigeration unit in the system, the supply and return temperature difference of the cooling water is controlled by the cooling water pump of the single-cold refrigeration unit, and the target outlet temperature setting value of the chilled water is controlled by the single-cold refrigeration unit; If the hot and cold dual temperature control is the hot water outlet temperature control, the chilled water outlet temperature of the chiller is controlled by the heat recovery unit chilled water pump, the hot water main temperature difference is controlled by the heat recovery unit hot water pump, and the heat recovery unit cooling water pump in the system is turned off; If the hot and cold dual temperature control is controlled by the heat pump hot water unit, the hot water main temperature control is performed according to the hot water main water supply temperature, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit.

5. The method according to claim 4, characterized in that The hot water main temperature control according to the hot water main water supply temperature, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit includes: Obtaining the water supply temperature of the hot water main, the available amount of the heat recovery unit and the operating load rate of the heat recovery unit, and determining whether the hot water main temperature exceeds a preset hot water main temperature threshold; If the water supply temperature of the hot water main exceeds the preset hot water main temperature threshold, determining whether the operating load rate of the heat recovery unit exceeds the preset operating load rate threshold of the heat recovery unit, and determining whether there are any remaining available heat recovery units based on the available amount of the heat recovery unit; If the operating load rate of the heat recovery unit exceeds the preset operating load rate threshold of the heat recovery unit and there is no remaining available heat recovery unit, the heat pump hot water unit in the system is turned on to control the temperature difference of the hot water main; If the water supply temperature of the hot water main is lower than the preset hot water main temperature threshold and the operating load rate of the heat recovery unit is lower than the preset operating load rate threshold of the heat recovery unit, the operation of the heat pump hot water unit in the system is shut down.

6. The method according to claim 4, characterized in that The hot water pump, the chilled water pump and the cooling water pump based on the heat recovery unit perform hot and cold dual temperature control, including: The target outlet temperature of chilled water is controlled by the chilled water pump of the heat recovery unit, and the outlet temperature of hot water is controlled by the hot water pump of the heat recovery unit and the cooling water pump of the heat recovery unit; Determining whether the hot water outlet temperature exceeds a preset hot water outlet temperature threshold; If the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, the cooling water system is turned on to discharge heat from the heat recovery unit based on the cooling tower in the system; If the hot water outlet temperature is lower than the preset hot water outlet temperature threshold, the cooling water pump of the heat recovery unit is turned off.

7. The method according to claim 6, characterized in that If the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, the cooling water system is turned on, and heat is discharged from the heat recovery unit based on a cooling tower in the system, including: If the hot water outlet temperature exceeds the preset hot water outlet temperature threshold, determining whether the cooling water pump of the heat recovery unit is running; If the cooling water pump of the heat recovery unit is running, start the cooling water pump of the heat recovery unit, and open the cooling water bypass valve of the heat recovery unit in the system to control the cooling water outlet temperature of the heat recovery unit to be the hot water outlet temperature; If the cooling water pump of the heat recovery unit is not running, determining whether the cooling water bypass valve of the heat recovery unit is closed; If the cooling water bypass valve of the heat recovery unit is closed, the cooling water outlet temperature of the heat recovery unit is controlled by the cooling water pump of the heat recovery unit to be the hot water outlet temperature; If the cooling water bypass valve of the heat recovery unit is opened, the cooling water outlet temperature of the heat recovery unit is controlled by the cooling water bypass valve of the heat recovery unit to be the hot water outlet temperature.

8. A control device for a cold and hot dual supply system, characterized in that: The device comprises: An acquisition module, used for acquiring a main pipe temperature parameter and a single-cold refrigeration unit load parameter of the system, and controlling an operation mode of the heat recovery unit based on the main pipe temperature parameter and the single-cold refrigeration unit load parameter, wherein the operation mode includes a heating mode and a cooling mode; A first control module is used for performing hot and cold dual temperature control through the chilled water pump and the cooling water pump in the single-cold refrigeration unit and the heat recovery unit, and the hot water pump of the heat recovery unit if the heat recovery unit is in the heating mode; The second control module is used to perform hot and cold dual temperature control based on the hot water pump, chilled water pump and cooling water pump of the heat recovery unit if the heat recovery unit is in the cooling mode.

9. An electronic device, comprising a memory, a processor, a communication interface and a communication bus, wherein the memory stores a computer program that can be run on the processor, and the memory and the processor communicate through the communication bus and the communication interface, characterized in that: When the processor executes the computer program, the control method of the cold and hot dual supply system described in any one of claims 1 to 7 is implemented.

10. A computer readable medium having a non-volatile program code executable by a processor, characterized in that: The program code enables the processor to execute the control method of the cold and hot dual supply system described in any one of claims 1 to 7.

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