Two-source air conditioner control system and method

Abstract

The invention provides a two-source type air conditioner control system and method, and belongs to the technical field of ship air conditioners, and a two-source type air conditioner comprises an electric-driven compression type refrigerating system and a waste-heat-driven injection type refrigerating system; the control system comprises a monitoring data acquisition module and a switching control module; the monitoring data acquisition module is used for acquiring monitoring data for determining whether the waste heat driven jet refrigeration system works normally or not, and the monitoring data comprises steam pressure, temperature of a central control room and fresh water amount; the switching control module is used for generating a switching instruction based on the steam pressure, the temperature of the central control room and the fresh water amount, and the switching instruction is used for indicating that the refrigerating system is the electric-driven compression type refrigerating system or the waste-heat-driven injection type refrigerating system. The two refrigeration systems are intelligently switched on the basis of real-time monitoring data, and reasonable utilization of resources is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of ship air-conditioning, and particularly to a dual-source air-conditioning control system and method for a ship engine room centralized control room. Background Art

[0002] A dual-source air conditioner is a composite air-conditioning system that combines two energy sources, usually electric-driven compression refrigeration and waste heat-driven absorption refrigeration, and is designed specifically for the high-temperature and high-humidity environment of a ship engine room and centralized control room. The dual-source air conditioner is mainly used to maintain the temperature of the engine room centralized control room at 25 - 30 °C and the humidity at 50 - 60%, so as to ensure the stable operation of precision electronic equipment and the safety of personnel operation. Its waste heat utilization rate reaches 40% - 60%, and it is 30% - 50% more energy-efficient than a pure-electric air-conditioning system, significantly reducing the ship operation cost. The dual-source switching ability can improve the system reliability, and the basic refrigeration function can still be maintained in case of a single energy source failure.

[0003] At present, most of the air conditioners in ship centralized control rooms adopt the compression refrigeration method. However, this method has problems such as high noise and high energy consumption during long-term operation. In contrast, ship ejector refrigeration technology has the advantages of energy conservation and noise reduction, and there is sufficient raw material steam supply on ships, providing good basic conditions for ejector refrigeration. However, in actual applications, when the ship is at the shore and uses shore power, the steam supply is insufficient and it is difficult to start the ejector refrigeration; while when the ship is sailing normally, the ejector refrigeration can make full use of waste heat. The conversion between these two refrigeration modes lacks clear guidance.

[0004] Therefore, how to design a dual-source air-conditioning control system to achieve safe and efficient switching between the two refrigeration modes and ensure the rational use of resources is a technical problem to be solved urgently. Summary of the Invention

[0005] In view of this, it is necessary to provide a dual-source air-conditioning control system and method to solve the technical problem of difficult conversion between the compression refrigeration mode and the ejector refrigeration mode existing in the prior art.

[0006] To solve the above technical problem, in a first aspect, the present invention provides a control system for a dual-source air conditioner. The dual-source air conditioner includes an electric-driven compression refrigeration system and a waste heat-driven ejector refrigeration system; the control system includes a monitoring data acquisition module and a switching control module; The monitoring data acquisition module is used to acquire monitoring data that determines whether the waste heat-driven ejector refrigeration system is working properly, wherein the monitoring data includes steam pressure, centralized control room temperature, and fresh water volume; The switching control module is used to generate a switching instruction based on the steam pressure, the temperature in the centralized control room, and the fresh water quantity, and the switching instruction is used to indicate that the refrigeration system is the electrically driven compression refrigeration system or the waste heat driven ejector refrigeration system.

[0007] In a possible implementation manner, the switching control module includes a control unit; The control unit is used to generate the switching instruction when the temperature in the centralized control room is higher than a preset temperature value, or the steam pressure is lower than a preset pressure value, or the fresh water quantity is lower than a preset flow rate, so as to switch the waste heat driven ejector refrigeration system to the electrically driven compression refrigeration system.

[0008] In a possible implementation manner, when the refrigeration system is an ejector refrigeration system, the control system further includes a steam pressure regulation module; The steam pressure regulation module is used to dynamically regulate the steam pressure based on a preset algorithm so that the vacuum degree in the evaporator is within a preset range.

[0009] In a possible implementation manner, the steam pressure regulation module includes a vacuum degree sensor and a PID controller; The vacuum degree sensor is used to monitor the vacuum degree in the evaporator in real time to obtain a vacuum degree measurement value; The PID controller is used to subtract the vacuum degree measurement value from the vacuum degree target value to obtain a vacuum degree deviation value, and regulate the opening degree of the steam valve based on the vacuum degree deviation value to control the steam supply quantity.

[0010] In a possible implementation manner, the steam pressure regulation module further includes a steam valve regulation unit and a feedforward compensation unit; The steam valve regulation unit is used to perform linearization compensation according to the valve characteristics of the steam valve so that the valve opening degree is within a preset range; The feedforward compensation unit is used to perform real-time compensation on the steam pressure.

[0011] In a possible implementation manner, when the refrigeration system is an ejector refrigeration system, the control system further includes a fresh water quantity regulation module; The fresh water quantity regulation module is used to dynamically regulate the fresh water supply quantity based on the temperature difference of the refrigerant water.

[0012] In a possible implementation manner, the fresh water supply regulation module includes a temperature difference calculation unit, a frequency conversion pump frequency regulation unit, and a limiting unit; The temperature difference calculation unit is used to calculate the temperature difference between the inlet and outlet of the refrigerant water in real time; The variable-frequency pump frequency adjustment unit is used to dynamically adjust the frequency of the variable-frequency pump according to the temperature difference between the inlet and outlet of the chilled water; The limiting unit is used to limit the frequency of the variable-frequency pump within a preset range.

[0013] In a possible implementation manner, the control system further includes an interlock control module for interlocking the compression refrigeration system and the ejector refrigeration system.

[0014] In a possible implementation manner, the interlock control module includes an electrical interlock unit and a logic controller; The electrical interlock unit is used to connect the power supply circuits of the compressor and the chilled water pump, so that the power supply of the compressor and the chilled water pump is mutually exclusive. Among them, the compressor is the core component of the compression refrigeration system, and the chilled water pump is the key equipment of the ejector refrigeration system; The logic controller is used to cut off the power supply of the compressor when starting the ejector refrigeration system, and disable the chilled water pump when starting the compression refrigeration system.

[0015] In a second aspect, the present invention also provides a control method for a dual-source air conditioner. The dual-source air conditioner includes a power-driven compression refrigeration system and a waste heat-driven ejector refrigeration system. The control method includes: Obtain monitoring data that determines whether the waste heat-driven ejector refrigeration system is working properly. Among them, the monitoring data includes steam pressure, central control room temperature, and fresh water volume; Based on the steam pressure, central control room temperature, and fresh water volume, switch between the power-driven compression refrigeration system and the waste heat-driven ejector refrigeration system.

[0016] The beneficial effects of the present invention are: The dual-source air conditioner control system provided by the present invention determines whether the waste heat-driven ejector refrigeration system is working properly through monitoring data, and generates a switching instruction according to the monitoring data to indicate that the refrigeration system is a power-driven compression refrigeration system or a waste heat-driven ejector refrigeration system; by real-time monitoring of key parameters such as evaporator vacuum degree and chilled water temperature, the operation state of the refrigeration system is dynamically optimized, the stability of the refrigeration effect is improved, and the refrigeration mode is automatically switched according to the monitoring data, reducing manual intervention, reducing energy consumption, and ensuring the rational use of resources. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A structural schematic diagram of an embodiment of the dual-source air-conditioning control system provided by the present invention; Figure 2 A structural schematic diagram of a switching control module provided by an embodiment of the present invention; Figure 3 A structural schematic diagram of a steam pressure regulation module provided by an embodiment of the present invention; Figure 4 A signal processing process diagram regarding the degree of vacuum provided by an embodiment of the present invention; Figure 5 A structural schematic diagram of a fresh water supply regulation module provided by an embodiment of the present invention; Figure 6 A structural schematic diagram of an interlock module provided by an embodiment of the present invention; Figure 7 A structural schematic diagram of an embodiment of the dual-source air-conditioning control system provided by the present invention. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0020] In the description of the embodiments of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example: A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0021] The descriptions such as "first" and "second" involved in the embodiments of the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the technical features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0022] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present invention. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0023] The present invention provides a dual-source air-conditioning control system, which will be described separately below.

[0024] Figure 1 As shown in the structural schematic diagram of an embodiment of the dual-source air-conditioning control system 100 provided by the present invention, Figure 1 the dual-source air-conditioning control system 100 includes a monitoring data acquisition module 101 and a switching control module 102; The monitoring data acquisition module 101 is used to acquire monitoring data for determining whether the waste heat-driven ejector refrigeration system is operating normally, where the monitoring data includes steam pressure, central control room temperature, and fresh water volume; Specifically, the steam pressure provided by the exhaust gas boiler is monitored by a steam pressure sensor, the steam temperature and the inlet and outlet temperatures of the refrigerant water are monitored by a temperature sensor, and the fresh water supply is monitored by a fresh water flow sensor.

[0025] The switching control module 102 is used to generate a switching instruction based on the steam pressure, central control room temperature, and fresh water volume, and the switching instruction is used to indicate that the refrigeration system is an electrically driven compression refrigeration system or a waste heat-driven ejector refrigeration system.

[0026] Among them, when the ship is docked, shore power is usually used to provide power for the central control room air conditioner, and at this time, the ship refrigeration system is a compression refrigeration system; during normal ship navigation, since the exhaust gas boiler relies on the main engine exhaust gas as a heat source and can continuously generate sufficient and qualified steam, an ejector refrigeration system is adopted. This control system generates a switching instruction by comprehensively monitoring the steam pressure provided by the exhaust gas boiler, the central control room temperature, and the fresh water volume entering the flooded evaporator, and intelligently judges whether to switch the compression refrigeration system to the ejector refrigeration system.

[0027] The dual-source air-conditioning control system provided by the present invention determines whether the waste heat-driven ejector refrigeration system is operating normally through monitoring data, generates a switching instruction according to the monitoring data, and indicates that the refrigeration system is an electrically driven compression refrigeration system or a waste heat-driven ejector refrigeration system; by real-time monitoring of key parameters such as the evaporator vacuum degree and the refrigerant water temperature, the operating state of the refrigeration system is dynamically optimized, the stability of the refrigeration effect is improved, and the refrigeration system is automatically switched according to the monitoring data, reducing manual intervention, reducing energy consumption, and ensuring the rational use of resources.

[0028] In an embodiment of the present invention, as Figure 2 shown, Figure 2 The figure is a structural schematic diagram of a switching control module provided by an embodiment of the present invention. The switching control module 102 includes a control unit 1021; A control unit 1021, configured to generate a switching instruction to switch the waste heat-driven ejector refrigeration system to an electrically driven compression refrigeration system when the temperature of the boiler is higher than a preset temperature value, or the steam pressure is lower than a preset pressure value, or the fresh water volume is lower than a preset flow rate.

[0029] It can be understood that this control system determines whether to switch the refrigeration system from a compression refrigeration system to an ejector refrigeration system by comprehensively monitoring the steam pressure provided by the exhaust gas boiler, the temperature in the centralized control room, and the fresh water volume entering the flooded evaporator. Specifically, once the ship docks, the exhaust gas stops heating the boiler, the temperature in the centralized control room gradually decreases, the steam evaporation volume decreases, and ultimately the steam pressure and temperature cannot meet the minimum pressure requirement of 0.6 MPa for ejector refrigeration. At this time, the system will automatically switch to the compression refrigeration system to ensure that the temperature in the centralized control room is maintained within a suitable range.

[0030] In addition, if a failure occurs in the fresh water supply system, such as the failure of the fresh water pump or the flash tank, resulting in insufficient fresh water supply, the evaporator cannot effectively absorb the heat of the chilled water, and thus cannot effectively reduce the temperature of the chilled water, and the cooling target of 27 °C in the centralized control room cannot be achieved. In this case, the system will also switch to the compression refrigeration mode to ensure the refrigeration effect.

[0031] In an embodiment of the present invention, if the refrigeration system is an ejector refrigeration system, the control system 100 further includes a steam pressure regulation module 103; The steam pressure regulation module 103 is configured to dynamically regulate the steam pressure based on a preset algorithm to keep the vacuum degree in the evaporator within a preset range.

[0032] It can be understood that when starting the ejector refrigeration system, it is necessary to regulate the steam supply volume. Specifically, the steam pressure can be dynamically regulated based on a preset algorithm to keep the vacuum degree in the evaporator within a preset range.

[0033] As Figure 3 shown, Figure 3 is a schematic structural diagram of a steam pressure regulation module provided by an embodiment of the present invention. The steam pressure regulation module 103 includes a vacuum degree sensor 1031 and a PID controller 1032; The vacuum degree sensor 1031 is configured to real-time monitor the vacuum degree in the evaporator to obtain a vacuum degree measurement value; The PID controller 1032 is configured to subtract the vacuum degree measurement value from the vacuum degree target value to obtain a vacuum degree deviation value, and regulate the opening degree of the steam valve based on the vacuum degree deviation value to control the steam supply volume.

[0034] It is understandable that when the ship starts the jet refrigeration system, high-temperature and high-pressure steam generated by the boiler is first supplied to drive the ejector and start the vacuum pumping operation. At the same time, the vacuum sensor 1031 monitors the vacuum degree in the evaporator in real time to ensure that it gradually reaches the set value. During this process, the working steam of the ejector enters the nozzle and expands to reduce the pressure, forming a low-pressure area at the nozzle outlet, so as to efficiently pump the vacuum of the evaporator and create a necessary vacuum environment for the refrigeration cycle. When the vacuum degree in the evaporator reaches the set value, the system automatically starts the refrigerant water pump and the fresh water pump. The fresh water pump passes the fresh water generated by the water maker through the pressure reduction of the pressure reducing valve and the flashing treatment of the flash tank in sequence, further reducing the water temperature and making it in a suitable low-pressure state. Then, the fresh water is sent into the high-vacuum environment of the evaporator. Under high-vacuum conditions, the fresh water quickly evaporates and absorbs the heat of the refrigerant water, thus achieving efficient refrigeration.

[0035] It should be noted that before the refrigerant water pump and the fresh water pump are automatically started, the system is still in the compression refrigeration mode. When the minimum steam pressure of 0.6 MPa is reached, that is, when the jet refrigeration system is ready, it is automatically switched to the jet refrigeration mode.

[0036] When starting the jet refrigeration system, the steam supply, the refrigerant water pump and the fresh water pump are controlled in stages to make the vacuum degree in the evaporator reach the target vacuum degree value. Among them, the target vacuum degree value is 98%, and the allowable fluctuation range is ±1%. The present invention adopts an advanced PID control method to accurately control the vacuum degree in the evaporator by dynamically adjusting the boiler steam supply. As Figure 4 shown, Figure 4 This is a signal processing process diagram of the vacuum degree provided by an embodiment of the present invention. Among them, the system presets the vacuum degree target value r(t), and uses the high-precision vacuum sensor 1031 to monitor the vacuum degree in the evaporator in real time to obtain the measured value z(t). The target value and the measured value are subtracted to obtain the deviation value e(t), which is transmitted to the PID controller 1032 for processing, and then the opening degree of the steam valve is adjusted to accurately control the steam supply and ensure that the vacuum degree is stable within the set range.

[0037] In addition, the steam pressure regulation module 103 further includes a steam valve regulation unit 1033 and a feedforward compensation unit 1034; The steam valve regulation unit 1033 is used to perform linearization compensation according to the valve characteristics of the steam valve so that the valve opening degree is within the preset range; The feedforward compensation unit 1034 is used to perform real-time compensation on the steam pressure.

[0038] It is understandable that, in order to improve control accuracy and stability, the system introduces a low-pass filter and a moving average filtering technique to effectively eliminate sensor noise. At the same time, range conversion and dead zone processing are carried out to avoid frequent valve actions caused by small fluctuations, thereby extending the equipment life and improving system reliability. In the core module of the PID algorithm, a discretization formula is adopted and combined with anti-integral saturation and derivative leading strategies to further optimize the control effect and ensure that the system can respond quickly and without overshoot under different working conditions. Moreover, by limiting the PID output, the steam valve adjustment unit 1033 performs linearization compensation according to the valve characteristics to ensure that the valve opening is always within a reasonable range and avoid steam waste or supply interruption caused by the valve being fully open or fully closed. A feedforward control mechanism is introduced, and the measurable disturbances (such as steam pressure fluctuations) are compensated in real time through the feedforward compensation unit 1034 to reduce the PID regulation burden. At the same time, an adaptive PID parameter adjustment and multi-mode switching strategy are adopted to automatically optimize the control parameters according to different working conditions, further enhancing the robustness and adaptability of the system and ensuring that the evaporator can operate stably and efficiently under various complex working conditions.

[0039] Finally, when the vacuum degree in the evaporator reaches the set value, the system automatically starts the refrigerant water pump and the fresh water pump. The fresh water pump will successively reduce the pressure of the fresh water generated by the water maker through a pressure reducing valve and perform flash evaporation treatment in the flash tank to further reduce the water temperature and make it in a suitable low-pressure state. Subsequently, the fresh water is sent into the high-vacuum environment of the evaporator. Under high-vacuum conditions, the fresh water quickly evaporates and absorbs the heat of the refrigerant water, thus achieving efficient refrigeration. It should be noted that before the refrigerant water pump and the fresh water pump are automatically started, the system is still in the compression refrigeration mode, and it will automatically switch to the jet refrigeration mode until the minimum steam pressure of 0.6 MPa is reached, that is, when the jet refrigeration system is ready.

[0040] In an embodiment of the present invention, if the refrigeration system is a jet refrigeration system, the control system 100 further includes a fresh water quantity adjustment module 104; The fresh water quantity adjustment module 104 is used to dynamically adjust the fresh water supply based on the temperature difference of the refrigerant water.

[0041] Among them, if the refrigeration system is a jet refrigeration system, it is necessary to regulate the fresh water supply for evaporation heat absorption. Specifically, the fresh water supply can be dynamically adjusted based on the temperature difference of the refrigerant water.

[0042] Further, as Figure 5 shown, Figure 5 FIG. is a schematic structural diagram of a fresh water supply adjustment module provided by an embodiment of the present invention. The fresh water supply adjustment module 104 includes a temperature difference calculation unit 1041, a variable frequency pump frequency adjustment unit 1042, and a limiting unit 1043; The temperature difference calculation unit 1041 is used to calculate the temperature difference between the inlet and outlet of the refrigerant water in real time; The variable frequency pump frequency adjustment unit 1042 is used to dynamically adjust the variable frequency pump frequency according to the temperature difference between the refrigerant water inlet and outlet; The limiting unit 1043 is used to limit the frequency of the variable frequency pump within a preset range.

[0043] It is understandable that in order to accurately adjust the fresh water supply, the control system 100 adopts a multi-input PID control strategy. Among them, the fresh water supply is affected by a variety of factors, including the temperature in the evaporator, the vacuum degree, and the ability of evaporation to absorb heat from the refrigerant water. Since the jet refrigeration system maintains the vacuum degree in the evaporator through a steam jet pump, thereby creating favorable conditions for the evaporation of fresh water, the fresh water supply adjustment module 104 is required to dynamically adjust the fresh water supply to ensure the efficiency and stability of the refrigeration process.

[0044] For example, during the operation of the evaporator, the inlet temperature of the refrigerant water is 12~15℃, and the outlet temperature is 7~10℃. At the same time, in order to avoid the influence of high-temperature steam on the heat transfer efficiency of the refrigerant water, the temperature of the evaporator shell must be strictly controlled to prevent it from being too high. To this end, the system adopts the following control logic: The main control variable is the outlet temperature of the refrigerant water, and the set value is 7~10℃. The lower limit is maintained at ≥7℃ to ensure the cooling effect of the refrigerant water. The auxiliary variable is the refrigerant water temperature difference calculated by the temperature difference calculation unit 1041, ΔT=Tin−Tout, with a normal range of 5±1℃, which is used to assist in monitoring the heat exchange efficiency of the refrigerant water. Then, the frequency of the variable frequency pump is adjusted by the variable frequency pump frequency adjustment unit 1042, and the frequency of the variable frequency pump is limited to the preset range by the limiter unit 1043, and the supply of fresh water is dynamically adjusted to meet the operation requirements of the evaporator. It can be seen that the system adopts PID adjustment method, and dynamically adjusts the frequency of the variable frequency pump by real-time monitoring of the outlet temperature and temperature difference of the refrigerant water, thereby realizing precise control of the supply of fresh water.

[0045] In one embodiment of the present invention, the control system 100 further includes an interlock control module 105 for interlocking the compression refrigeration system and the injection refrigeration system.

[0046] like Figure 6 As shown, Figure 6 A schematic diagram of the structure of an interlocking module provided by an embodiment of the present invention. The interlocking control module 105 includes an electrical interlocking unit 1051 and a logic controller 1052; The electrical interlocking unit 1051 is used to connect the power supply circuits of the compressor and the refrigerant water pump so that the power supply of the compressor and the refrigerant water pump are mutually exclusive. The compressor is the core component of the compression refrigeration system, and the refrigerant water pump is the key equipment of the injection refrigeration system. A logic controller 1052, configured to cut off the power supply of the compressor when starting the ejector refrigeration system, and disable the refrigerant water pump when starting the compression refrigeration system.

[0047] It can be understood that, in order to ensure that the two refrigeration methods do not interfere with each other, the present invention designs an interlock mechanism for the compressor and the refrigerant water pump. Among them, the compressor is the core component of the compression refrigeration, and the refrigerant water pump is the key equipment of the ejector refrigeration. When one of the devices starts, the corresponding refrigeration system will be powered on and start running, and the interlock mechanism ensures that the two refrigeration methods will not work simultaneously, thereby avoiding mutual interference and achieving efficient and stable refrigeration effects. Specifically, the electrical interlock unit 1051 makes the power supplies of the compressor and the refrigerant water pump mutually exclusive by connecting their power supply circuits, and the logic controller 1052 cuts off the power supply of the compressor when starting the ejector refrigeration mode, and disables the refrigerant water pump when starting the compression refrigeration mode.

[0048] To better implement the dual-source air-conditioning control system in the embodiments of the present invention, correspondingly, on the basis of the dual-source air-conditioning control system, as Figure 7 shown, the embodiments of the present invention further provide a dual-source air-conditioning control method, including: S701: Obtain monitoring data for determining whether the waste heat-driven ejector refrigeration system is working properly, where the monitoring data includes steam pressure, control room temperature, and fresh water volume; S702: Switch between the power-driven compression refrigeration system and the waste heat-driven ejector refrigeration system based on the steam pressure, control room temperature, and fresh water volume.

[0049] The dual-source air-conditioning control method provided in the above embodiments can implement the technical solutions described in the embodiments of the dual-source air-conditioning control system. The specific implementation principle can be referred to the corresponding content in the embodiments of the dual-source air-conditioning control system, which will not be elaborated here.

[0050] The above has introduced in detail the dual-source air-conditioning control method, device, electronic device, and storage medium provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A control system for a two-source air conditioner, characterized in that, The dual-source air conditioner includes an electrically driven compression refrigeration system and a waste heat-driven ejector refrigeration system; the control system includes a monitoring data acquisition module and a switching control module; The monitoring data acquisition module is used to acquire monitoring data that determines whether the waste heat-driven ejector refrigeration system is operating normally, where the monitoring data includes steam pressure, control room temperature, and fresh water volume; The switching control module is used to generate a switching instruction based on the steam pressure, control room temperature, and fresh water volume, and the switching instruction is used to indicate that the refrigeration system is the electrically driven compression refrigeration system or the waste heat-driven ejector refrigeration system.

2. The control system of the dual-source air conditioner according to claim 1, wherein The switching control module includes a control unit; The control unit is used to generate the switching instruction when the temperature in the control room is higher than the preset temperature value, or the steam pressure is lower than the preset pressure value, or the fresh water volume is lower than the preset flow rate, so as to switch the waste heat-driven ejector refrigeration system to the electrically driven compression refrigeration system.

3. The control system of the two-source air conditioner according to claim 1, characterized in that If the refrigeration system is an ejector refrigeration system, the control system further includes a steam pressure regulation module; The steam pressure regulation module is used to dynamically regulate the steam pressure based on a preset algorithm so that the vacuum degree in the evaporator is within a preset range.

4. The control system of the two-source air conditioner according to claim 3, characterized in that, The steam pressure regulation module includes a vacuum degree sensor and a PID controller; The vacuum degree sensor is used to monitor the vacuum degree in the evaporator in real time to obtain a vacuum degree measurement value; The PID controller is used to subtract the vacuum degree measurement value from the vacuum degree target value to obtain a vacuum degree deviation value, and regulate the opening degree of the steam valve based on the vacuum degree deviation value to control the steam supply amount.

5. The control system of the two-source air conditioner according to claim 4, characterized in that, The steam pressure regulation module further includes a steam valve regulation unit and a feedforward compensation unit; The steam valve regulation unit is used to perform linearization compensation according to the valve characteristics of the steam valve so that the valve opening degree is within a preset range; The feedforward compensation unit is used to perform real-time compensation on the steam pressure.

6. The control system of the two-source air conditioner according to claim 2, characterized in that, If the refrigeration system is an ejector refrigeration system, the control system further includes a fresh water volume regulation module; The fresh water volume regulation module is used to dynamically regulate the fresh water supply amount based on the temperature difference of the refrigerant water.

7. The control system of the two-source air conditioner according to claim 6, characterized in that The fresh water supply regulation module includes a temperature difference calculation unit, a variable frequency pump frequency regulation unit, and a limiting unit; The temperature difference calculation unit is used to calculate the temperature difference between the inlet and outlet of the refrigerant water in real time; The variable frequency pump frequency regulation unit is used to dynamically adjust the frequency of the variable frequency pump according to the temperature difference between the inlet and outlet of the refrigerant water; The limiting unit is used to limit the frequency of the variable frequency pump within a preset range.

8. The control system of the two-source air conditioner according to claim 1, characterized in that, The control system further includes an interlock control module for interlocking the compression refrigeration system and the ejector refrigeration system.

9. The control system of the dual-source air conditioner according to claim 3, characterized in that, The interlock control module includes an electrical interlock unit and a logic controller; The electrical interlock unit is used to connect the power supply circuits of the compressor and the refrigerant water pump so that the power supplies of the compressor and the refrigerant water pump are mutually exclusive, where the compressor is the core component of the compression refrigeration system and the refrigerant water pump is a key device of the ejector refrigeration system; The logic controller is configured to cut off the power supply of the compressor when starting the ejector refrigeration system, and disable the refrigerant water pump when starting the compression refrigeration system.

10. A control method for a two-source air conditioner, wherein, The dual-source air conditioner includes an electrically driven compression refrigeration system and a waste heat driven ejector refrigeration system, and is characterized by comprising: Obtain monitoring data for determining whether the waste heat driven ejector refrigeration system is operating normally, wherein the monitoring data includes steam pressure, control room temperature, and fresh water volume; Switch between the electrically driven compression refrigeration system and the waste heat driven ejector refrigeration system based on the steam pressure, control room temperature, and fresh water volume.

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