CN105160980A - Method, device and system for simulating air-conditioning cold source system based on simulation platform - Google Patents

Abstract

The invention relates to a method, device and system for simulating an air-conditioning cold source system based on a simulation platform, wherein the method includes the following steps: receiving a starting signal of the air-conditioning cold source system; judging whether a manual starting signal is received or an automatic starting signal is received Signal; when a manual start signal is received, the manual start process is performed. When the automatic start signal is received, the automatic start process is carried out, that is, the first type of analog equipment is automatically controlled to start after the third preset time after receiving the automatic start signal; and the second type of analog equipment is automatically controlled after a fourth preset time delay. The equipment is started; and then delay the fifth preset time to automatically control the start of the third type of analog equipment. The method, device and system of the invention can effectively control various types of simulation equipment, simplify the control method of the air-conditioning cold source system, and be easy to implement.

Description

Method, device and system for simulating air conditioning cold source system based on simulation platform

technical field

The invention relates to the field of computer simulation of an air-conditioning system, in particular to a method, device and system for simulating an air-conditioning cold source system based on a simulation platform.

Background technique

In recent years, with the rapid development of China's construction industry, simple residential functions are far from meeting people's requirements for buildings. Intelligent buildings based on modern building technology, computer technology, communication technology and control technology have gradually entered In the public eye, it has attracted widespread attention. The automatic control of the air conditioning system is an important link in the realization of intelligent buildings. Most central air conditioners in intelligent buildings are no longer controlled manually or pneumatically, but are automatically controlled by computers. Therefore, the teaching method of architectural environment and energy application engineering must be synchronized with the development of intelligent buildings, strengthen the teaching of HVAC automation, strengthen students' cognition ability of physical objects and practical ability of engineering practice, so that students can understand and master the continuous development Advanced system automation technology to cultivate professional and technical personnel who can adapt to social development.

However, at present, most of the teaching and experimental devices for air conditioning systems are based on actual systems, such as real wind systems, real water systems, real units, etc. Such teaching and experimental devices are bulky, energy-consuming, and difficult to maintain and maintain. And the mobility is poor. For the experimenters, they need to go to many places to observe the operation of the entire air conditioning system, which is not intuitive. In addition, for this kind of teaching experiment device based on the real system, in the actual simulation experiment, the real system must be adjusted to reflect the actual working conditions of the air conditioning system, and the teaching experiment device cannot be fully simulated by means of simulation. Simulation control, simulation diagnosis, etc., thus increasing the cost of teaching experiments. In addition, although some simulation equipment such as cooling water pump simulation equipment, cooling tower fan simulation equipment, chilled water pump simulation equipment, and chiller simulation equipment are often used in the prior art to simulate real devices, the control methods for these simulation equipment are mostly still related to The control method based on the real system is similar, more complex and cumbersome, and cannot effectively control these simulated devices, and it is not easy to implement in teaching.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the lack of a method in the prior art that can effectively control various types of simulation equipment to realize the simulation of the air-conditioning cold source system, thereby providing a simulation platform-based simulation of the air-conditioning cold source system. The simulation method, device and system can realize effective control of various simulation equipment, simplify the control method of the air-conditioning cold source system, and are easy to implement.

A method for simulating an air-conditioning cold source system based on a simulation platform of the present invention, the simulation platform includes a first type of simulation equipment, a second type of simulation equipment, and a third type of simulation equipment, and the first type of simulation equipment includes cooling Water pump simulation equipment and cooling tower fan simulation equipment, the second type of simulation equipment includes chilled water pump simulation equipment, the third type of simulation equipment includes chiller simulation equipment, and the method includes the following steps:

Receive the start signal of the air conditioning cold source system;

Judging whether a manual start signal is received or an automatic start signal is received;

When a manual start signal is received and a start signal of the first type of analog equipment is received, control the start of the first type of analog equipment;

When the analog equipment of the first type is in the activated state and receives the activation signal of the analog equipment of the second type, control the analog equipment of the second type to start;

When the analog equipment of the first type is in the activated state, the analog equipment of the second type is in the activated state, and an activation signal of the analog equipment of the third type is received, the analog equipment of the third type is controlled to be activated.

Preferably, the simulation platform also includes a supplementary water pump simulation device, and after the control of the third type of simulation device is started, the following steps are further included:

Receive the pressure value of the constant pressure point of chilled water;

judging whether the pressure value is smaller than the difference between the pressure preset value and the fluctuation preset value;

When the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, the water supplement pump simulation device is controlled to start.

Preferably, after the control of the third type of analog equipment is started, the following steps are further included:

Receive the pressure difference value between the chilled water supply pressure and the return water pressure, perform a first PID adjustment according to the pressure difference value, and use the output value of the first PID adjustment as the opening value of the pressure difference regulating valve; and/or

receiving the cooling water return temperature, performing a second PID adjustment according to the cooling water return temperature, and using the output value of the second PID adjustment as the opening value of the cooling water bypass valve; and/or

The third PID adjustment is performed according to the return temperature of the cooling water, and the output value of the third PID adjustment is used as the frequency value of the fan of the cooling tower.

Preferably, after the control of the third type of analog equipment is started, the following steps are further included:

When a forced water replenishment signal is received, control the water replenishment pump simulation device to start; and/or

When receiving a cooling water pump failure signal, a cooling tower fan failure signal, a chiller unit failure signal or a chilled water pump failure signal, stop the air conditioning cold source system; and/or

When the shutdown signal of the air-conditioning cold source system is received, the air-conditioning cold source system is stopped.

Preferably, the step of shutting down the air-conditioning cold source system includes:

controlling the closure of the third type of analog equipment;

Delaying for a first preset time after the third type of analog device is turned off, and controlling the first type of analog device to be turned off;

Delaying for a second preset time after the first type of analog device is turned off, and controlling the second type of analog device to be turned off.

Preferably, the following steps are also included:

When the automatic start signal is received, after the third preset time after receiving the automatic start signal, automatically control the start of the first type of analog equipment;

Delaying for a fourth preset time after the start of the first type of analog equipment, and automatically controlling the start of the second type of analog equipment;

Delaying for a fifth preset time after the start of the second type of analog equipment, and automatically controlling the start of the third type of analog equipment.

A device for simulating an air-conditioning cold source system based on a simulation platform of the present invention, the simulation platform includes a first type of simulation equipment, a second type of simulation equipment, and a third type of simulation equipment, and the first type of simulation equipment includes cooling Water pump simulation equipment and cooling tower fan simulation equipment, the second type of simulation equipment includes chilled water pump simulation equipment, and the third type of simulation equipment includes chiller simulation equipment, including:

The first receiving unit is used to receive the start signal of the air-conditioning cold source system;

The first judging unit is used to judge whether a manual start signal or an automatic start signal is received;

The first control unit is configured to control the start of the first type of analog equipment when a manual start signal is received and the start signal of the first type of analog equipment is received;

A second control unit, configured to control the start-up of the second-type analog device when the first-type analog device is in the start-up state and receives the start-up signal of the second-type analog device;

A third control unit, configured to control the third type of analog equipment when the analog equipment of the first type is in the activated state, the analog equipment of the second type is in the activated state, and receives an activation signal of the analog equipment of the third type The simulated device starts.

Preferably, after the third control unit, it further includes:

The second receiving unit is used to receive the pressure value of the constant pressure point of the chilled water;

The second judging unit is used to judge whether the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, and whether it is greater than the sum of the pressure preset value and the fluctuation preset value;

The fourth control unit is configured to control the water supplement pump simulation device to start when the pressure value is less than the difference between the pressure preset value and the fluctuation preset value.

Preferably, after the third control unit, it further includes:

The first acquisition unit is used to receive the pressure difference value between the chilled water supply pressure and the return water pressure, perform the first PID adjustment according to the pressure difference value, and use the output value of the first PID adjustment as the opening of the pressure difference regulating valve degree value; and/or

The second acquisition unit is configured to receive the cooling water return temperature, perform a second PID adjustment according to the cooling water return temperature, and use the output value of the second PID adjustment as the opening value of the cooling water bypass valve; and /or

The third acquisition unit is configured to perform a third PID adjustment according to the return temperature of the cooling water, and use the output value of the third PID adjustment as the frequency value of the fan of the cooling tower.

Preferably, after the third control unit, it further includes:

The fifth control unit is configured to control the start of the supplementary water pump simulation device when receiving the forced water supply signal; and/or

The sixth control unit is configured to shut down the air-conditioning cold source system when receiving a cooling water pump failure signal, a cooling tower fan failure signal, a chiller failure signal or a chilled water pump failure signal; and/or

The seventh control unit is configured to shut down the air-conditioning cold source system when receiving the shutdown signal of the air-conditioning cold source system.

Preferably, the sixth control unit or the seventh control unit includes:

An eighth control unit, configured to control the shutdown of the third type of analog equipment;

A ninth control unit, configured to delay the first preset time after the third type of analog equipment is turned off, and control the first type of analog equipment to be turned off;

The tenth control unit is configured to delay for a second preset time after the first type of analog device is turned off, and control the second type of analog device to be turned off.

Preferably, it also includes:

The eleventh control unit is configured to automatically control the start of the first type of analog equipment after receiving the automatic start signal after a third preset time after receiving the automatic start signal;

A twelfth control unit, configured to delay the fourth preset time after the first type of analog equipment is started, and automatically control the start of the second type of analog equipment;

The thirteenth control unit is configured to delay the fifth preset time after the start of the second type of analog equipment, and automatically control the start of the third type of analog equipment.

A system for simulating an air-conditioning cold source system according to the present invention includes:

The simulation platform includes the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment, the first type of simulation equipment includes cooling water pump simulation equipment and cooling tower fan simulation equipment, and the second type of simulation equipment includes refrigeration Water pump simulation equipment, the third type of simulation equipment includes chiller simulation equipment;

The display panel is used to display the operating status of the air-conditioning cold source system;

The operation panel includes a plurality of switch buttons and a plurality of knobs, which are used to generate corresponding control signals according to the input, including the start signal of the air-conditioning cold source system, the start signal of the first type of analog equipment, and the start signal of the second type of analog equipment and start signals for Class III analogue equipment;

And the device for simulating the air-conditioning cold source system based on the simulation platform, including:

The first receiving unit is used to receive the start signal of the air-conditioning cold source system;

The first judging unit is used to judge whether a manual start signal or an automatic start signal is received;

The first control unit is configured to control the start of the first type of analog equipment when a manual start signal is received and the start signal of the first type of analog equipment is received;

A second control unit, configured to control the start-up of the second-type analog device when the first-type analog device is in the start-up state and receives the start-up signal of the second-type analog device;

A third control unit, configured to control the third type of analog equipment when the first type of analog equipment is in the activated state, the second type of analog equipment is in the activated state and an activation signal of the third type of analog equipment is received start up.

The technical solution of the present invention has the following advantages:

1. In the present invention, a simulation platform for simulating the air-conditioning cold source system is constructed by adopting the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment, and the air-conditioning cooling source system is designed based on the simulation platform The simulation method is used to design a simulation platform that can realize the simulation of the air-conditioning cold source system completely based on the simulation device. It does not need to use a real system, which is easy to implement and more convenient for experimental teaching. And by setting the start-up process of the air-conditioning cold source system manually when receiving the manual start signal after receiving the start signal of the air-conditioning cold source system, the experimenter in the air-conditioning cold source system has been very clear about the start-up sequence of each simulated device In some cases, the start-up time can be shortened and the simulation efficiency can be improved. It can not only facilitate teachers to explain the start-up and working process of the air-conditioning cold source system, but also help students intuitively and quickly grasp and understand the operation and control methods of the air-conditioning cold source system. And by setting the startup sequence of starting the first type of simulation equipment first, then starting the second type of simulation equipment and the third type of simulation equipment in sequence, it can help teachers or students to simulate the pre-cooling process of the air-conditioning cold source system, and deepen the understanding of the air-conditioning cold source. Understanding of system pre-cooling.

2. In the present invention, by setting the water replenishment pump simulation equipment on the simulation platform and combining the control method to the water supply pump simulation equipment, the start and stop control of the simulation water supply pump simulation equipment can be simulated, which can further facilitate teachers and students to understand the water replenishment pump simulation equipment. The operation and control method of the pump is more conducive to deepening the understanding and mastery of the control of the water supply pump in the air-conditioning cold source system.

3. In the present invention, the control of the simulated pressure difference regulating valve is simulated by setting the opening value of the pressure difference regulating valve obtained after the first PID adjustment according to the pressure difference between the chilled water supply pressure and the return water pressure. The control of the cooling water bypass valve is simulated by setting the opening value of the cooling water bypass valve obtained after the second PID adjustment according to the cooling water return temperature. By setting the third PID adjustment according to the return water temperature of the cooling water, the frequency value of the cooling tower fan is obtained to simulate the control of the fan speed of the cooling tower, so as to further facilitate teachers and students to understand the pressure difference regulating valve, cooling water side The operation and control methods of through valve and cooling tower fan are more conducive to deepening the understanding and mastery of the control of pressure difference regulating valve, cooling water bypass valve and cooling tower fan in the air conditioning cold source system.

4. In the present invention, by setting the water replenishment pump simulation device to start when the forced water replenishment signal is received, the situation of forced water replenishment is simulated. By setting the air-conditioning cold source system to shut down when receiving the cooling water pump failure signal, cooling tower fan failure signal, chiller unit failure signal or chilled water pump failure signal, the simulation is performed in the cooling water pump, cooling tower fan, chiller unit and chilled water pump Stop in time when any fault occurs, so as to further facilitate teachers and students to understand when various faults occur in the air-conditioning cold source system, such as forced water supply, cooling water pump fault signal, cooling tower fan fault signal, chiller fault signal, refrigeration Water pump failure signals, etc., need to control the air-conditioning cold source system to stop immediately to protect the safety of the air-conditioning cold source system, which is more conducive to deepening the understanding and mastery of the control method when a failure occurs in the air-conditioning cold source system.

5. In the present invention, by arranging the third type of simulation equipment, the first type of simulation equipment and the second type of simulation equipment to be closed sequentially and after a period of time delay, the antifreeze treatment of the air conditioning cold source system can be simulated and simulated in cold water Keep the chilled water pump still working for a period of time after the unit is turned off, and release the residual cooling capacity on the chiller through the operation of the chilled water pump to prevent the residual cooling capacity from freezing the chiller, which can further help teachers or students Simulate the antifreeze treatment process of the air-conditioning cold source system to deepen the understanding of the antifreeze treatment of the air-conditioning cold source system.

6. In the present invention, when the automatic start signal is received, the start-up process of the air-conditioning cold source system is automatically controlled, that is, the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment are automatically controlled in sequence, Therefore, it can provide a simple start-up operation process for beginners or experimenters who are experimenting with the air-conditioning cold source system for the first time, and according to the start-up process, it can help teachers or students to simulate the pre-cooling process of the air-conditioning cold source system, which is more conducive to helping them Understand and master the start-up process of the air-conditioning cold source system.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the flow chart of a specific example of the method for simulating an air-conditioning cold source system based on a simulation platform in Embodiment 1 of the present invention;

2 is a flow chart of a specific example of a method for simulating an air-conditioning cold source system based on a simulation platform in Embodiment 1 of the present invention;

3 is a functional block diagram of a specific example of a device for simulating an air-conditioning cold source system based on a simulation platform in Embodiment 2 of the present invention;

4 is a functional block diagram of a specific example of a device for simulating an air-conditioning cold source system based on a simulation platform in Embodiment 2 of the present invention;

Fig. 5 is a functional block diagram of a specific example of a system for simulating a cold source system of an air conditioner in Embodiment 3 of the present invention.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for description purposes only, and should not be understood as indicating or implying relative importance.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Example 1

This embodiment provides a method for simulating an air-conditioning cold source system based on a simulation platform. The simulation platform includes a first type of simulation equipment, a second type of simulation equipment, and a third type of simulation equipment. The first type of simulation equipment includes a cooling water pump simulation Equipment and cooling tower fan simulation equipment, the second type of simulation equipment includes chilled water pump simulation equipment, and the third type of simulation equipment includes chiller simulation equipment, as shown in Figure 1, the method includes the following steps:

Step S1, receiving the start signal of the air-conditioning cold source system, and then in a waiting state until the manual start signal or the automatic start signal is received, and enters the next step.

Step S2. Determine whether a manual start signal or an automatic start signal is received. When the manual start signal is received, enter the control process of manually starting the air-conditioning cold source system, and enter steps S3-S5.

Step S3, when the start signal of the first type of analog device is received, control the start of the first type of analog device.

Step S4, when the first type of analog equipment is in the activated state and receives the activation signal of the second type of analog equipment, control the activation of the second type of analog equipment. When the first type of analog equipment is not activated, even if the activation signal of the second type of analog equipment or the activation signal of the third type of analog equipment is received, the second type of analog equipment or the third type of analog equipment cannot be activated.

Step S5 , when the first type of analog equipment is in the activated state, the second type of analog equipment is in the activated state and the activation signal of the third type of analog equipment is received, control the activation of the third type of analog equipment. When neither the first-type analog device nor the second-type analog device is activated, even if the activation signal of the third-type analog device is received, the third-type analog device cannot be activated. By setting the manual start-up control process of the above steps S2-S5, some experienced experimenters can be provided with a way to independently operate the start-up process, and the start-up process can also be accelerated.

Step S6. When the automatic start signal is received, after the third preset time after the automatic start signal is received, the first type of analog equipment is automatically controlled to start, and enters the control process of automatically starting the air-conditioning cold source system. The third preset time can be set according to actual needs, for example, it can be set to 30-90 seconds, preferably it can be set to about 60 seconds.

Step S7, delaying for a fourth preset time after the first type of analog equipment is activated, and automatically controlling the activation of the second type of analog equipment. The fourth preset time can be set according to actual needs, for example, it can be set to 60-120 seconds, preferably it can be set to about 90 seconds.

Step S8, delaying the fifth preset time after the second type of analog equipment is activated, and automatically controlling the activation of the third type of analog equipment. The fifth preset time can be set according to actual needs, for example, it can be set to 10-60 seconds, preferably it can be set to about 30 seconds. By setting the above-mentioned fourth and fifth preset times, it is beneficial for the experimenter to observe the process of delay start, which is convenient for the experiment teaching.

In this embodiment, a simulation platform for simulating the air-conditioning cold source system is constructed by using the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment, and based on this simulation platform, a simulation platform for the air-conditioning cooling source system is designed. Therefore, a simulation platform that can realize the simulation of the air-conditioning cold source system based on the simulation device is designed. It does not need to use a real system, which is easy to implement and more convenient for experimental teaching. And by setting the start-up process of the air-conditioning cold source system manually when receiving the manual start signal after receiving the start signal of the air-conditioning cold source system, the experimenter in the air-conditioning cold source system has been very clear about the start-up sequence of each simulated device In some cases, the start-up time can be shortened and the simulation efficiency can be improved. It can not only facilitate teachers to explain the start-up and working process of the air-conditioning cold source system, but also help students intuitively and quickly grasp and understand the operation and control methods of the air-conditioning cold source system. And by setting the startup sequence of starting the first type of simulation equipment first, then starting the second type of simulation equipment and the third type of simulation equipment in sequence, it can help teachers or students to simulate the pre-cooling process of the air-conditioning cold source system, and deepen the understanding of the air-conditioning cold source. Understanding of system pre-cooling.

And by setting when the automatic start signal is received, the start-up process of the air-conditioning cold source system is automatically controlled, that is, the first type of analog equipment, the second type of analog equipment and the third type of analog equipment are automatically controlled in sequence, so that the initial Scholars or experimenters who are experimenting with the air-conditioning cold source system for the first time provide a simple start-up operation process, and according to the start-up process, it can help teachers or students to simulate the pre-cooling process of the air-conditioning cold source system, which is more conducive to helping them understand and master air-conditioning The start-up process of the cold source system.

As a preferred embodiment, the above-mentioned simulation platform also includes a supplementary water pump simulation equipment, as shown in Figure 2, after the third type of simulation equipment in the above step S5 or step S8 is started, it also includes the following steps:

Step S9, receiving the pressure value of the constant pressure point of the chilled water.

Step S10 , judging whether the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, and whether it is greater than the sum of the pressure preset value and the fluctuation preset value. When the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, that is, the pressure value of the constant pressure point of chilled water is too small, enter step S11; when the pressure value is greater than the sum of the pressure preset value and the fluctuation preset value , that is, when the pressure value of the constant pressure point of chilled water is too large, enter step S12; when the pressure value is greater than or equal to the difference between the pressure preset value and the fluctuation preset value and is less than or equal to the pressure preset value and the fluctuation preset value When the sum value is set, no action is taken on the make-up pump. The pressure preset value and the fluctuation preset value can be set according to actual needs, for example, the pressure preset value can be set to 35-45, preferably 40. The fluctuation preset value can be set to 3-7, preferably 5.

Step S11, controlling the start-up of the supplementary water pump simulation device.

Step S12, controlling the supplementary water pump simulation device to shut down.

In this embodiment, by setting the water supplement pump simulation equipment on the simulation platform and combining the control method of the water supplement pump simulation equipment, the start and stop control of the simulation water supplement pump simulation equipment can be simulated, which can further facilitate teachers and students to understand the water supply pump simulation equipment. The operation control method is more conducive to deepening the understanding and mastery of the control of the water supply pump in the air-conditioning cold source system.

As a preferred implementation manner, after the above-mentioned step S5 or step S8 is started to control the third type of analog equipment, the following steps are also included:

Step S13 , receiving the pressure difference between the chilled water supply pressure and the return water pressure, performing a first PID adjustment according to the pressure difference, and using the output value of the first PID adjustment as the opening value of the pressure difference regulating valve. When the chilled water pump is started, the first PID regulation is started, so that the output value of the first PID regulation controls the opening value of the pressure difference regulating valve, and when the chilled water pump is turned off, the pressure difference regulating valve is also closed. The first PID adjustment method can be compiled by using VisualLogic, a graphically modular programming software of the BACtalk system. The PID module in VisualLogic only needs to input the proportional coefficient KP, differential coefficient KI, and preset water supply and return pressure difference to output the PID adjustment. result. In this embodiment, the values of the proportional coefficient KP and the differential coefficient KI (which can be obtained from expert experience and experiments) can be set according to the actual working conditions of the air-conditioning cold source system, and then the required supply after PID adjustment can be preset. The return water pressure difference is applied to the PID module in VisualLogic. According to the actual input pressure difference between the chilled water supply pressure and the return water pressure, the output value of the first PID adjustment is used as the opening value of the pressure difference regulating valve. Those skilled in the art should understand that the control of the opening value of the differential pressure regulating valve is not limited to the implementation of the PID module in VisualLogic, and the PID module in other programming software can also be used to realize the opening value of the differential pressure regulating valve. control. The above step S13 may be performed at any position before, after or in between steps S9-S12.

As a preferred implementation manner, after the above-mentioned step S5 or step S8 is started to control the third type of analog equipment, the following steps are also included:

Step S14 , receiving the cooling water return temperature, performing a second PID adjustment according to the cooling water return temperature, and using the output value of the second PID adjustment as the opening value of the cooling water bypass valve. The start and stop of the cooling water bypass valve is controlled by the start and stop of the cooling water pump. When the cooling water pump is turned on, the cooling water bypass valve is also opened, and when the cooling water pump is turned off, the cooling water bypass valve is also closed. The second PID adjustment method is the same as the above-mentioned first PID adjustment method. It can be compiled by using the BACtalk system graphical modular programming software VisualLogic, that is, only need to input the proportional coefficient KP, the differential coefficient KI, and the lower limit of the preset cooling water return temperature. Can output the result of PID adjustment. In this embodiment, the values of the proportional coefficient KP and the differential coefficient KI (which can be obtained from expert experience and experiments) can be set according to the actual working conditions of the air-conditioning cold source system, and then the cooling required to be achieved after PID adjustment can be preset. The lower limit of the water return temperature is applied to the PID module in VisualLogic. According to the actual input cooling water return temperature, the output value adjusted by the second PID is used as the opening value of the cooling water bypass valve. Those skilled in the art should understand that the control of the opening value of the cooling water bypass valve is not limited to the implementation of the PID module in VisualLogic, and the PID module in other programming software can also be used to realize the opening of the cooling water bypass valve. Degree control. The above step S14 may be performed at any position before, after or in between steps S9-S13.

As a preferred implementation manner, after the above-mentioned step S5 or step S8 is started to control the third type of analog equipment, the following steps are also included:

Step S15 , performing a third PID adjustment according to the return temperature of the cooling water, and using the output value of the third PID adjustment as the frequency value of the fan of the cooling tower. The start and stop of the cooling tower fan frequency control is controlled by the start and stop of the cooling tower fan, and the cooling tower fan frequency can be controlled only when the cooling tower fan is turned on. The third PID adjustment method is the same as the above-mentioned first and second PID adjustment methods, and can be compiled by using the BACtalk system graphical modular programming software VisualLogic, that is, only need to input the proportional coefficient KP, differential coefficient KI, preset cooling water return temperature value, the result of PID adjustment can be output. In this embodiment, the values of the proportional coefficient KP and the differential coefficient KI (which can be obtained from expert experience and experiments) can be set according to the actual working conditions of the air-conditioning cold source system, and then the cooling required to be achieved after PID adjustment can be preset. Water return temperature value, apply the PID module in VisualLogic, according to the actual input cooling water return temperature, the output value adjusted by the third PID is used as the frequency value of the cooling tower fan. Those skilled in the art should understand that the control of the frequency value of the cooling tower fan is not limited to the implementation of the PID module in VisualLogic, and the PID module in other programming software can also be used to realize the control of the frequency value of the cooling tower fan. The above step S15 may be performed at any position before, after or in between steps S9-S14.

In this embodiment, the control of the pressure difference regulating valve is simulated by setting the opening value of the pressure difference regulating valve obtained after the first PID adjustment according to the pressure difference between the chilled water supply pressure and the return water pressure. The control of the cooling water bypass valve is simulated by setting the opening value of the cooling water bypass valve obtained after the second PID adjustment according to the cooling water return temperature. By setting the third PID adjustment according to the return water temperature of the cooling water, the frequency value of the cooling tower fan is obtained to simulate the control of the fan speed of the cooling tower, so as to further facilitate teachers and students to understand the pressure difference regulating valve, cooling water side The operation and control methods of through valve and cooling tower fan are more conducive to deepening the understanding and mastery of the control of pressure difference regulating valve, cooling water bypass valve and cooling tower fan in the air conditioning cold source system.

As a preferred implementation manner, in any step after the above-mentioned step S5 of controlling the activation of the third type of simulation equipment: when a forced water replenishment signal is received, the water supplement pump simulation equipment is controlled to start. In any step after the control of the third type of analog equipment in the above step S5 or step S8 starts: when receiving the cooling water pump failure signal, the cooling tower fan failure signal, the chiller unit failure signal or the chilled water pump failure signal, make the air conditioner cold source System down. When the shutdown signal of the air-conditioning cold source system is received, the air-conditioning cold source system is stopped.

In this embodiment, by setting the water replenishment pump simulation device to start when the forced water replenishment signal is received, the situation where forced water replenishment is required is simulated. By setting the air-conditioning cold source system to shut down when receiving the cooling water pump failure signal, cooling tower fan failure signal, chiller unit failure signal or chilled water pump failure signal, the simulation is performed in the cooling water pump, cooling tower fan, chiller unit and chilled water pump Stop in time when any fault occurs, so as to further facilitate teachers and students to understand when various faults occur in the air-conditioning cold source system, such as forced water supply, cooling water pump fault signal, cooling tower fan fault signal, chiller fault signal, refrigeration Water pump failure signals, etc., need to control the air-conditioning cold source system to stop immediately to protect the safety of the air-conditioning cold source system, which is more conducive to deepening the understanding and mastery of the control method when a failure occurs in the air-conditioning cold source system.

Preferably, the above-mentioned steps of shutting down the air-conditioning cold source system include:

Controls the shutdown of the third type of analog equipment.

After the third type of analog equipment is turned off, the first preset time is delayed, and the first type of analog equipment is controlled to be turned off.

After the first type of analog equipment is turned off, the second preset time is delayed, and the second type of analog equipment is controlled to be turned off. The above-mentioned first and second preset times can be set according to actual needs, for example, the first preset time can be set to 50-70 seconds, preferably about 60 seconds, and the second preset time can be set to 10-40 seconds , preferably about 30 seconds.

In this embodiment, by setting the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment to be turned off sequentially and after a period of time delay, the antifreeze treatment of the air conditioning cold source system can be simulated, and the simulation in the chiller Keep the chilled water pump still working for a period of time after it is turned off, and release the residual cooling capacity on the chiller through the operation of the chilled water pump to prevent the residual cooling capacity from freezing the chiller, which can further help teachers or students to simulate Simulate the antifreeze treatment process of the air-conditioning cold source system, and deepen the understanding of the antifreeze treatment of the air-conditioning cold source system.

As a preferred implementation, it also includes the step of calculating the chilled water cooling capacity, specifically:

Respectively receive chilled water supply, return water temperature values and chilled water flow values, when the difference between the chilled water return temperature value and the chilled water supply temperature value is less than the temperature difference preset value, according to the formula Calculate the chilled water cooling value. By setting the calculation steps of chilled water cooling capacity, teachers and students can intuitively observe the change of chilled water cooling capacity caused by the adjusted chilled water supply, return water temperature and chilled water flow value, which is more conducive to deepening the air conditioning system. Understanding and mastering of chilled water cooling capacity control in the cold source system.

Example 2

This embodiment provides a device for simulating an air-conditioning cold source system based on a simulation platform. The simulation platform includes a first type of simulation equipment, a second type of simulation equipment, and a third type of simulation equipment. The first type of simulation equipment includes a cooling water pump Simulation equipment and cooling tower fan simulation equipment, the second type of simulation equipment includes chilled water pump simulation equipment, and the third type of simulation equipment includes chiller simulation equipment, as shown in Figure 3, including:

The first receiving unit 1 is used for receiving the starting signal of the air-conditioning cold source system.

The first judgment unit 2 is configured to judge whether a manual start signal or an automatic start signal is received.

The first control unit 3 is configured to control the first type of analog equipment to start when a manual activation signal and an activation signal of the first type of analog equipment are received.

The second control unit 4 is configured to control the start-up of the second-type analog device when the first-type analog device is in the start-up state and receives the start-up signal of the second-type analog device.

The third control unit 5 is configured to control the activation of the third type of analog equipment when the first type of analog equipment is in the activated state, the second type of analog equipment is in the activated state and the activation signal of the third type of analog equipment is received.

The eleventh control unit 6 is configured to automatically control the first type of analog equipment to start after the third preset time after receiving the automatic start signal when the automatic start signal is received.

The twelfth control unit 7 is configured to delay the fourth preset time after the first type of analog equipment is activated, and automatically control the activation of the second type of analog equipment.

The thirteenth control unit 8 is configured to delay the fifth preset time after the second type of analog equipment is activated, and automatically control the activation of the third type of analog equipment.

In this embodiment, a simulation platform for simulating the air-conditioning cold source system is constructed by using the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment, and based on this simulation platform, a simulation platform for the air-conditioning cooling source system is designed. Therefore, a simulation platform that can realize the simulation of the air-conditioning cold source system based on the simulation device is designed. It does not need to use a real system, which is easy to implement and more convenient for experimental teaching. And by setting the start-up process of the air-conditioning cold source system manually when receiving the manual start signal after receiving the start signal of the air-conditioning cold source system, the experimenter in the air-conditioning cold source system has been very clear about the start-up sequence of each simulated device In some cases, the start-up time can be shortened and the simulation efficiency can be improved. It can not only facilitate teachers to explain the start-up and working process of the air-conditioning cold source system, but also help students intuitively and quickly grasp and understand the operation and control methods of the air-conditioning cold source system. And by setting the startup sequence of starting the first type of simulation equipment first, then starting the second type of simulation equipment and the third type of simulation equipment in sequence, it can help teachers or students to simulate the pre-cooling process of the air-conditioning cold source system, and deepen the understanding of the air-conditioning cold source. Understanding of system pre-cooling.

And by setting when the automatic start signal is received, the start-up process of the air-conditioning cold source system is automatically controlled, that is, the first type of analog equipment, the second type of analog equipment and the third type of analog equipment are automatically controlled in sequence, so that the initial Scholars or experimenters who are experimenting with the air-conditioning cold source system for the first time provide a simple start-up operation process, and according to the start-up process, it can help teachers or students to simulate the pre-cooling process of the air-conditioning cold source system, which is more conducive to helping them understand and master air-conditioning The start-up process of the cold source system.

As a preferred embodiment, as shown in FIG. 4, after the third control unit 5 or the thirteenth control unit 8, it also includes:

The second receiving unit 9 is used to receive the pressure value of the constant pressure point of the chilled water.

The second judging unit 10 is used to judge whether the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, and whether it is greater than the sum of the pressure preset value and the fluctuation preset value.

The fourth control unit 11 is configured to control the supplementary water pump simulation device to start when the pressure value is less than the difference between the pressure preset value and the fluctuation preset value.

The fourteenth control unit 12 is configured to control the supplementary water pump simulation device to shut down when the pressure value is greater than the sum of the pressure preset value and the fluctuation preset value.

When the pressure value is greater than or equal to the difference between the pressure preset value and the fluctuation preset value and is less than or equal to the sum of the pressure preset value and the fluctuation preset value, no operation is performed on the supplementary water pump.

In this embodiment, by setting the water supplement pump simulation equipment on the simulation platform and combining the control method of the water supplement pump simulation equipment, the start and stop control of the simulation water supplement pump simulation equipment can be simulated, which can further facilitate teachers and students to understand the water supply pump simulation equipment. The operation control method is more conducive to deepening the understanding and mastery of the control of the water supply pump in the air-conditioning cold source system.

As a preferred implementation, after the third control unit 5 or the thirteenth control unit 8, it also includes: a first acquisition unit, used to receive the differential pressure value between the chilled water supply pressure and the return water pressure, and according to the differential pressure value The first PID adjustment is performed, and the output value of the first PID adjustment is used as the opening value of the differential pressure regulating valve.

As a preferred embodiment, after the third control unit 5 or the thirteenth control unit 8, it further includes: a second acquisition unit, configured to receive the cooling water return temperature, and perform the second PID adjustment according to the cooling water return temperature , the output value of the second PID adjustment is used as the opening value of the cooling water bypass valve.

As a preferred embodiment, after the third control unit 5 or the thirteenth control unit 8, it also includes: a third acquisition unit, which is used to perform third PID adjustment according to the cooling water return temperature, and adjust the third PID adjustment The output value is used as the frequency value of the cooling tower fan.

In this embodiment, the control of the pressure difference regulating valve is simulated by setting the opening value of the pressure difference regulating valve obtained after the first PID adjustment according to the pressure difference between the chilled water supply pressure and the return water pressure. The control of the cooling water bypass valve is simulated by setting the opening value of the cooling water bypass valve obtained after the second PID adjustment according to the cooling water return temperature. By setting the third PID adjustment according to the return water temperature of the cooling water, the frequency value of the cooling tower fan is obtained to simulate the control of the fan speed of the cooling tower, so as to further facilitate teachers and students to understand the pressure difference regulating valve, cooling water side The operation and control methods of through valve and cooling tower fan are more conducive to deepening the understanding and mastery of the control of pressure difference regulating valve, cooling water bypass valve and cooling tower fan in the air conditioning cold source system.

As a preferred implementation manner, after the third control unit 5 or the thirteenth control unit 8, it further includes: a fifth control unit, configured to control the water supplement pump simulation device to start when a forced water supplement signal is received.

The sixth control unit is configured to shut down the air-conditioning cold source system when receiving a cooling water pump failure signal, a cooling tower fan failure signal, a chiller unit failure signal or a chilled water pump failure signal.

The seventh control unit is configured to shut down the air-conditioning cold source system when receiving the shutdown signal of the air-conditioning cold source system.

In this embodiment, by setting the water replenishment pump simulation device to start when the forced water replenishment signal is received, the situation where forced water replenishment is required is simulated. By setting the air-conditioning cold source system to shut down when receiving the cooling water pump failure signal, cooling tower fan failure signal, chiller unit failure signal or chilled water pump failure signal, the simulation is performed in the cooling water pump, cooling tower fan, chiller unit and chilled water pump Stop in time when any fault occurs, so as to further facilitate teachers and students to understand when various faults occur in the air-conditioning cold source system, such as forced water supply, cooling water pump fault signal, cooling tower fan fault signal, chiller fault signal, refrigeration Water pump failure signals, etc., need to control the air-conditioning cold source system to stop immediately to protect the safety of the air-conditioning cold source system, which is more conducive to deepening the understanding and mastery of the control method when a failure occurs in the air-conditioning cold source system.

Preferably, the above-mentioned sixth or seventh control unit includes:

The eighth control unit is used to control the closing of the third type of analog equipment;

The ninth control unit is used to delay the first preset time after the third type of analog equipment is turned off, and control the first type of analog equipment to be turned off;

The tenth control unit is configured to delay the second preset time after the first type of analog equipment is turned off, and control the second type of analog equipment to be turned off.

In this embodiment, by setting the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment to be turned off sequentially and after a period of time delay, the antifreeze treatment of the air conditioning cold source system can be simulated, and the simulation in the chiller Keep the chilled water pump still working for a period of time after it is turned off, and release the residual cooling capacity on the chiller through the operation of the chilled water pump to prevent the residual cooling capacity from freezing the chiller, which can further help teachers or students to simulate Simulate the antifreeze treatment process of the air-conditioning cold source system, and deepen the understanding of the antifreeze treatment of the air-conditioning cold source system.

Example 3

This embodiment provides a system for simulating an air-conditioning cold source system, as shown in FIG. 5 , including: a simulation platform including a first-type simulation device 100, a second-type simulation device 200 and a third-type simulation device 300, wherein the first One type of simulation equipment 100 includes cooling water pump simulation equipment 101 and cooling tower fan simulation equipment 102 , the second type of simulation equipment 200 includes chilled water pump simulation equipment 201 , and the third type of simulation equipment 300 includes chiller simulation equipment 301 .

The display panel 400 is used to display the operating status of the air-conditioning cold source system. Preferably, the display panel 400 includes multiple liquid crystal display screens for displaying the chilled water return temperature, the chilled water supply temperature, the chilled water flow rate, the pressure value of the constant pressure point of chilled water, the differential pressure of chilled water, the differential pressure of chilled water Regulating valve opening value, cooling water supply temperature, cooling water return water temperature, cooling water bypass valve opening value, cooling tower fan frequency, etc.

The operation panel 500 includes a plurality of switch buttons and a plurality of knobs, which are used to generate corresponding control signals according to the input. The switch buttons control the generation including the start signal of the air-conditioning cold source system, the start signal of the first type of analog equipment, and the second type of analog equipment. The start signal of the equipment and the start signal of the third type of analog equipment, etc., the knob can adjust the input chilled water return temperature, chilled water supply temperature, chilled water flow, the pressure value of the constant pressure point of chilled water, the differential pressure of chilled water, Cooling water supply temperature, cooling water return temperature, etc.

And the device 600 for simulating the air-conditioning cold source system based on the simulation platform, including:

The first receiving unit 1 is used to receive the start signal of the air-conditioning cold source system;

The first judging unit 2 is used to judge whether a manual start signal or an automatic start signal is received;

The first control unit 3 is configured to control the start of the first type of analog equipment when a manual start signal is received and the start signal of the first type of analog equipment is received;

The second control unit 4 is configured to control the start of the second type of analog equipment when the first type of analog equipment is in the activated state and receives the activation signal of the second type of analog equipment;

The third control unit 5 is configured to control the activation of the third type of analog equipment when the first type of analog equipment is in the activated state, the second type of analog equipment is in the activated state and the activation signal of the third type of analog equipment is received.

In this embodiment, a simulation platform for simulating the air-conditioning cold source system is constructed by using the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment, and based on this simulation platform, a simulation platform for the air-conditioning cooling source system is designed. Therefore, a simulation platform that can realize the simulation of the air-conditioning cold source system based on the simulation device is designed. It does not need to use a real system, which is easy to implement and more convenient for experimental teaching. And by setting the start-up process of the air-conditioning cold source system manually when receiving the manual start signal after receiving the start signal of the air-conditioning cold source system, the experimenter in the air-conditioning cold source system has been very clear about the start-up sequence of each simulated device In some cases, the start-up time can be shortened and the simulation efficiency can be improved. It can not only facilitate teachers to explain the start-up and working process of the air-conditioning cold source system, but also help students intuitively and quickly grasp and understand the operation and control methods of the air-conditioning cold source system. And by setting the startup sequence of starting the first type of simulation equipment first, then starting the second type of simulation equipment and the third type of simulation equipment in sequence, it can help teachers or students to simulate the pre-cooling process of the air-conditioning cold source system, and deepen the understanding of the air-conditioning cold source. Understanding of system pre-cooling.

Preferably, the system for simulating the air-conditioning cold source system also includes:

The second receiving unit is used to receive the pressure value of the constant pressure point of the chilled water.

The second judging unit is used to judge whether the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, and whether it is greater than the sum of the pressure preset value and the fluctuation preset value.

The fourth control unit is configured to control the water supplement pump simulation device to start when the pressure value is less than the difference between the pressure preset value and the fluctuation preset value.

The fourteenth control unit is configured to control the supplementary water pump simulation device to shut down when the pressure value is greater than the sum of the pressure preset value and the fluctuation preset value.

The first acquisition unit is used to receive the differential pressure value of the chilled water supply pressure and the return water pressure, perform the first PID adjustment according to the differential pressure value, and use the output value of the first PID adjustment as the opening value of the differential pressure regulating valve.

The second acquisition unit is configured to receive the cooling water return temperature, perform a second PID adjustment according to the cooling water return temperature, and use the output value of the second PID adjustment as the opening value of the cooling water bypass valve.

The third acquisition unit is configured to perform a third PID adjustment according to the return temperature of the cooling water, and use the output value of the third PID adjustment as the frequency value of the fan of the cooling tower.

The fifth control unit is configured to control the water replenishment pump simulation device to start when the forced water replenishment signal is received.

The sixth control unit is configured to shut down the air-conditioning cold source system when receiving a cooling water pump failure signal, a cooling tower fan failure signal, a chiller unit failure signal or a chilled water pump failure signal.

The seventh control unit is configured to shut down the air-conditioning cold source system when receiving the shutdown signal of the air-conditioning cold source system.

The eleventh control unit is configured to automatically control the first type of analog equipment to start after a third preset time after receiving the automatic start signal when the automatic start signal is received.

The twelfth control unit is used for delaying the fourth preset time after the start of the first type of analog equipment, and automatically controlling the start of the second type of analog equipment.

The thirteenth control unit is used for delaying the fifth preset time after the start of the second type of analog equipment, and automatically controlling the start of the third type of analog equipment.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (13)

1. A method for simulating an air-conditioning cold source system based on a simulation platform, said simulation platform comprising a first type of simulation equipment, a second type of simulation equipment and a third type of simulation equipment, said first type of simulation equipment comprising a cooling water pump Simulation equipment and cooling tower fan simulation equipment, the second type of simulation equipment includes chilled water pump simulation equipment, and the third type of simulation equipment includes chiller simulation equipment, wherein the method includes the following steps: Receive the start signal of the air conditioning cold source system; Judging whether a manual start signal is received or an automatic start signal is received; When a manual start signal is received and a start signal of the first type of analog equipment is received, control the start of the first type of analog equipment; When the analog equipment of the first type is in the activated state and receives the activation signal of the analog equipment of the second type, control the analog equipment of the second type to start; When the analog equipment of the first type is in the activated state, the analog equipment of the second type is in the activated state, and an activation signal of the analog equipment of the third type is received, the analog equipment of the third type is controlled to be activated. 2. The method according to claim 1, characterized in that, the simulation platform also includes a replenishment pump simulation device, and after the third type of simulation device of the control is started, it also includes the following steps: Receive the pressure value of the constant pressure point of chilled water; judging whether the pressure value is smaller than the difference between the pressure preset value and the fluctuation preset value; When the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, the water supplement pump simulation device is controlled to start. 3. The method according to claim 1 or 2, characterized in that, after the control of the third type of analog equipment is started, the following steps are further included: Receive the pressure difference value between the chilled water supply pressure and the return water pressure, perform a first PID adjustment according to the pressure difference value, and use the output value of the first PID adjustment as the opening value of the pressure difference regulating valve; and/or receiving the cooling water return temperature, performing a second PID adjustment according to the cooling water return temperature, and using the output value of the second PID adjustment as the opening value of the cooling water bypass valve; and/or The third PID adjustment is performed according to the return temperature of the cooling water, and the output value of the third PID adjustment is used as the frequency value of the fan of the cooling tower. 4. The method according to any one of claims 1-3, characterized in that, after said controlling the startup of said third type of analog equipment, further comprising the following steps: When a forced water replenishment signal is received, control the water replenishment pump simulation device to start; and/or When receiving a cooling water pump failure signal, a cooling tower fan failure signal, a chiller unit failure signal or a chilled water pump failure signal, stop the air conditioning cold source system; and/or When the shutdown signal of the air-conditioning cold source system is received, the air-conditioning cold source system is stopped. 5. The method according to claim 4, wherein the step of shutting down the air-conditioning cold source system comprises: controlling the closure of the third type of analog equipment; Delaying for a first preset time after the third type of analog device is turned off, and controlling the first type of analog device to be turned off; Delaying for a second preset time after the first type of analog device is turned off, and controlling the second type of analog device to be turned off. 6. The method according to any one of claims 1-5, further comprising the steps of: When the automatic start signal is received, after the third preset time after receiving the automatic start signal, automatically control the start of the first type of analog equipment; Delaying for a fourth preset time after the start of the first type of analog equipment, and automatically controlling the start of the second type of analog equipment; Delaying for a fifth preset time after the start of the second type of analog equipment, and automatically controlling the start of the third type of analog equipment. 7. A device for simulating an air-conditioning cold source system based on a simulation platform, said simulation platform comprising a first type of simulation equipment, a second type of simulation equipment and a third type of simulation equipment, said first type of simulation equipment comprising a cooling water pump Simulation equipment and cooling tower fan simulation equipment, the second type of simulation equipment includes chilled water pump simulation equipment, and the third type of simulation equipment includes chiller simulation equipment, characterized in that it includes: The first receiving unit is used to receive the start signal of the air-conditioning cold source system; The first judging unit is used to judge whether a manual start signal or an automatic start signal is received; The first control unit is configured to control the start of the first type of analog equipment when a manual start signal is received and the start signal of the first type of analog equipment is received; A second control unit, configured to control the start-up of the second-type analog device when the first-type analog device is in the start-up state and receives the start-up signal of the second-type analog device; A third control unit, configured to control the third type of analog equipment when the analog equipment of the first type is in the activated state, the analog equipment of the second type is in the activated state, and receives an activation signal of the analog equipment of the third type The simulated device starts. 8. The device according to claim 7, further comprising: after the third control unit: The second receiving unit is used to receive the pressure value of the constant pressure point of the chilled water; The second judging unit is used to judge whether the pressure value is less than the difference between the pressure preset value and the fluctuation preset value, and whether it is greater than the sum of the pressure preset value and the fluctuation preset value; The fourth control unit is configured to control the water supplement pump simulation device to start when the pressure value is less than the difference between the pressure preset value and the fluctuation preset value. 9. The device according to claim 7 or 8, characterized in that, after the third control unit, it further comprises: The first acquisition unit is used to receive the pressure difference value between the chilled water supply pressure and the return water pressure, perform the first PID adjustment according to the pressure difference value, and use the output value of the first PID adjustment as the opening of the pressure difference regulating valve degree value; and/or The second acquisition unit is configured to receive the cooling water return temperature, perform a second PID adjustment according to the cooling water return temperature, and use the output value of the second PID adjustment as the opening value of the cooling water bypass valve; and /or The third acquisition unit is configured to perform a third PID adjustment according to the return temperature of the cooling water, and use the output value of the third PID adjustment as the frequency value of the fan of the cooling tower. 10. The device according to any one of claims 7-9, characterized in that, after the third control unit, it further comprises: The fifth control unit is configured to control the start of the supplementary water pump simulation device when receiving the forced water supply signal; and/or The sixth control unit is configured to shut down the air-conditioning cold source system when receiving a cooling water pump failure signal, a cooling tower fan failure signal, a chiller failure signal or a chilled water pump failure signal; and/or The seventh control unit is configured to shut down the air-conditioning cold source system when receiving the shutdown signal of the air-conditioning cold source system. 11. The device according to claim 10, wherein the sixth control unit or the seventh control unit comprises: An eighth control unit, configured to control the shutdown of the third type of analog equipment; A ninth control unit, configured to delay the first preset time after the third type of analog equipment is turned off, and control the first type of analog equipment to be turned off; The tenth control unit is configured to delay for a second preset time after the first type of analog device is turned off, and control the second type of analog device to be turned off. 12. The device according to any one of claims 7-11, further comprising: The eleventh control unit is configured to automatically control the startup of the first type of analog equipment after a third preset time after receiving the automatic startup signal when the automatic startup signal is received; A twelfth control unit, configured to delay the fourth preset time after the first type of analog equipment is started, and automatically control the start of the second type of analog equipment; The thirteenth control unit is configured to delay the fifth preset time after the start-up of the second-type analog equipment, and automatically control the start-up of the third-type analog equipment. 13. A system for simulating an air-conditioning cold source system, characterized in that it comprises: The simulation platform includes the first type of simulation equipment, the second type of simulation equipment and the third type of simulation equipment, the first type of simulation equipment includes cooling water pump simulation equipment and cooling tower fan simulation equipment, and the second type of simulation equipment includes refrigeration Water pump simulation equipment, the third type of simulation equipment includes chiller simulation equipment; The display panel is used to display the operating status of the air-conditioning cold source system; The operation panel includes a plurality of switch buttons and a plurality of knobs, which are used to generate corresponding control signals according to the input, including the start signal of the air-conditioning cold source system, the start signal of the first type of analog equipment, and the start signal of the second type of analog equipment and start signals for Class III analogue equipment; And the device for simulating the air-conditioning cold source system based on the simulation platform, including: The first receiving unit is used to receive the start signal of the air-conditioning cold source system; The first judging unit is used to judge whether a manual start signal or an automatic start signal is received; The first control unit is configured to control the start of the first type of analog equipment when a manual start signal is received and the start signal of the first type of analog equipment is received; A second control unit, configured to control the start-up of the second-type analog device when the first-type analog device is in the start-up state and receives the start-up signal of the second-type analog device; A third control unit, configured to control the third type of analog equipment when the first type of analog equipment is in the activated state, the second type of analog equipment is in the activated state and an activation signal of the third type of analog equipment is received start up.