Simulation control method and device for refrigeration equipment, refrigeration equipment and storage medium

Abstract

The present invention discloses a simulation control method, device, refrigeration equipment, and storage medium for refrigeration equipment. The method includes: controlling a first switch unit to be closed, a second switch unit to be opened, and a water pump to be turned on; turning on the refrigeration equipment and an electric heating pipe; determining the heat release power of the refrigeration equipment's cooling medium when it flows through the refrigeration equipment, and the heat absorption power of the refrigeration equipment's cooling medium when it flows through the electric heating pipe based on the current inlet and outlet temperatures of the refrigeration equipment, the current inlet and outlet temperatures of the electric heating pipe, and the current medium flow rate; and performing PID regulation on the initial electric power of the electric heating pipe to achieve a balance between the heat absorption power and the heat release power. This solution balances the cooling capacity of the refrigeration equipment and the heating power of the electric heating pipe by adjusting the electric power of the electric heating pipe based on the inlet and outlet temperatures of the electric heating pipe, the inlet and outlet temperatures of the refrigeration equipment, and the flow rate of the cooling medium, thereby more accurately reflecting the heat absorption power of the cooling medium or refrigerant of the refrigeration equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration equipment, and specifically relates to a simulation control method, device, refrigeration equipment and storage medium for refrigeration equipment, and in particular to a control method, device, refrigeration equipment and storage medium for a terminal heat load simulation integrated device for refrigeration equipment. Background Art

[0002] On airplanes (especially medium-sized and large passenger or cargo planes with long flight times), electronic equipment generates a lot of heat and needs to be cooled, and food in the kitchen needs to be kept fresh. Therefore, these airplanes (i.e. medium-sized and large passenger or cargo planes with long flight times) are not only equipped with aircraft air-conditioning system equipment (i.e. environmental control system equipment) to provide good and comfortable air to cabin passengers, but also with auxiliary cooling system equipment for cooling electronic equipment, kitchens and other terminal equipment.

[0003] However, in the process of developing cooling equipment with a large number of terminal loads, such as auxiliary cooling system equipment for aircraft, considering the low initial reliability level of the product and the particularity of the actual use of the product, the product performance of the refrigeration equipment will not be verified in the actual use scenario. Instead, the terminal thermal load simulation integrated device will be used to simulate and verify the product performance of the refrigeration equipment. Among them, the terminal thermal load simulation integrated device is a device used to simulate the sum of the thermal loads of all terminal devices during the actual use of the refrigeration equipment. The terminal thermal load simulation device of the refrigeration equipment can be implemented using an electric heating tube, but the control of the heating power of the electric heating tube in the related scheme requires a lot of calculations and manual adjustments to achieve a balance between the cooling capacity of the refrigeration equipment and the heating power of the electric heating tube. This is time-consuming, the operation process is complicated, and the accuracy is difficult to control, which increases the time and difficulty of performance verification tests during the development of refrigeration equipment.

[0004] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0005] The object of the present invention is to provide a simulation control method, device, refrigeration equipment and storage medium for refrigeration equipment, so as to solve the problem that the terminal heat load simulation device of the refrigeration equipment in the related scheme can be realized by using an electric heating tube, but in the control of the heating power of the electric heating tube, a large amount of calculation and manual adjustment are required to balance the cooling capacity of the refrigeration equipment and the heating power of the electric heating tube, which is time-consuming, the operation process is complicated, and the accuracy is difficult to control, which increases the time and difficulty of the performance verification test in the development process of the refrigeration equipment. The method achieves the goal of adjusting the electric power of the electric heating tube according to the inlet and outlet temperatures of the electric heating tube in the terminal heat load simulation device of the refrigeration equipment, the inlet and outlet temperatures of the refrigeration equipment, and the flow rate of the cooling medium so that the heat absorption power of the fluid in the electric heating tube is close to and finally equal to the real-time heat release power of the refrigeration equipment, so that the cooling capacity of the refrigeration equipment and the heating power of the electric heating tube are balanced, which can more accurately reflect the heat absorption power of the cooling medium or refrigerant of the refrigeration equipment, and realize automatic adjustment, which saves time and simplifies the operation process.

[0006] The present invention provides a simulation control method for a refrigeration device, wherein the number of terminal cooling units of the refrigeration device is n, where n is a positive integer; a terminal heat load simulation device and a water pump are provided in conjunction with the refrigeration device; the terminal heat load simulation device is used to simulate the sum of the heat loads of the n terminal cooling units of the refrigeration device; the water pump is used to provide power for the cooling medium in the entire circuit of the terminal heat load simulation device, so that it circulates in the terminal heat load simulation device; when n ≥ 2, the n terminal cooling units are arranged in parallel; the outlet of the refrigeration device is connected to the inlet of the n terminal cooling units after passing through the first switch unit; the n The outlet of the terminal cooling unit is connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration equipment; the outlet of the refrigeration equipment is also connected to the inlet of the electric heating pipe after passing through the second switch unit; the outlet of the electric heating pipe and the outlets of the n terminal cooling units are merged into the inlet of the water pump; the simulation control method of the refrigeration equipment comprises: controlling the first switch unit to be closed and the second switch unit to be opened, and then controlling the water pump to be opened so that the cooling medium of the refrigeration equipment flows in the terminal heat load simulation device; turning on the refrigeration equipment according to the working conditions of the environment to be simulated, and setting the preset working conditions under the working conditions of the environment to be simulated. The initial electric power controls the electric heating tube to turn on; obtains the temperature at the inlet of the refrigeration equipment, which is recorded as the current inlet temperature of the refrigeration equipment; obtains the temperature at the outlet of the refrigeration equipment, which is recorded as the current outlet temperature of the refrigeration equipment; obtains the temperature at the inlet of the electric heating tube, which is recorded as the current inlet temperature of the electric heating tube; obtains the temperature at the outlet of the electric heating tube, which is recorded as the current outlet temperature of the electric heating tube; and obtains the mass flow rate of the cooling medium circulating in the refrigeration equipment, which is recorded as the current medium flow rate of the refrigeration equipment; according to the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, The current outlet temperature of the electric heating tube and the current medium flow of the refrigeration equipment determine the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment and the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube; when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the initial electric power of the electric heating tube is PID-adjusted according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is balanced with the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment.

[0007] In some embodiments, a first temperature detection unit is arranged at the inlet of the refrigeration device; a second temperature detection unit is arranged at the outlet of the refrigeration device; a third temperature detection unit is arranged at the inlet of the electric heating tube; a fourth temperature detection unit is arranged at the outlet of the electric heating tube; a mass flow detection unit is provided at the front end of the second switch unit; wherein, obtaining the temperature at the inlet of the refrigeration device, recorded as the current inlet temperature of the refrigeration device, includes: obtaining the temperature detected by the first temperature detection unit, recorded as the current inlet temperature of the refrigeration device; obtaining the temperature at the outlet of the refrigeration device, recorded as the current outlet temperature of the refrigeration device, includes: obtaining the temperature detected by the second temperature detection unit, recorded as the current outlet temperature of the refrigeration device The temperature detected by the unit is recorded as the current outlet temperature of the refrigeration equipment; the temperature at the inlet of the electric heating pipe is obtained, which is recorded as the current inlet temperature of the electric heating pipe, including: obtaining the temperature detected by the third temperature detection unit, which is recorded as the current inlet temperature of the electric heating pipe; obtaining the temperature at the outlet of the electric heating pipe, which is recorded as the current outlet temperature of the electric heating pipe, including: obtaining the temperature detected by the fourth temperature detection unit, which is recorded as the current outlet temperature of the electric heating pipe; obtaining the mass flow rate of the cooling medium circulating in the refrigeration equipment, which is recorded as the current medium flow rate of the refrigeration equipment, including: obtaining the mass flow rate detected by the mass flow detection unit, which is recorded as the current medium flow rate of the refrigeration equipment.

[0008] In some embodiments, the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube are determined according to the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, including: inputting the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment into a preset PLC, and using a calculation model preset in the PLC model, calculates the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube; wherein, the calculation model pre-set in the PLC includes: the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the corresponding relationship between the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment; and the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube.

[0009] In some embodiments, the correspondence between the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment includes: Po = qmCp (t1-t2); the correspondence between the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube includes: Pi = qmCp (t4-t3); wherein Po represents the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, qm represents the current medium flow rate of the refrigeration equipment, Cp represents the constant-pressure specific heat capacity of the cooling medium of the refrigeration equipment, t1 represents the current inlet temperature of the refrigeration equipment, t2 represents the current outlet temperature of the refrigeration equipment; Pi represents the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, t3 represents the current inlet temperature of the electric heating tube, and t4 represents the current outlet temperature of the electric heating tube.

[0010] In some embodiments, a power regulator is provided in conjunction with the electric heating tube; the power regulator is used to adjust the current electric power of the electric heating tube; when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the initial electric power of the electric heating tube is PID-regulated according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is balanced with the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, including: when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the power regulator of the electric heating tube is PID-controlled according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the current electric power of the electric heating tube is adjusted by the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is balanced with the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment.

[0011] In some embodiments, when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the power regulator of the electric heating tube is PID controlled according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the current electric power of the electric heating tube is adjusted by the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration tube are balanced, including: When the heat release power of the cold medium flowing through the refrigeration equipment remains unchanged, determine the relationship between the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment; if the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube = the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, then control the power regulator through the PID controller to keep the current electric power of the electric heating tube at the initial electric power of the electric heating tube, so that the cooling medium of the refrigeration equipment flows through the electric heating tube When the heat pipe absorbs heat, the heat power of the refrigeration equipment when the cooling medium flows through the refrigeration equipment is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment; if the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating pipe is greater than the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, the power regulator is controlled by the PID controller to reduce the current electric power of the electric heating pipe on the basis of the initial electric power of the electric heating pipe until the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating pipe is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, so that The current electric power of the electric heating tube is maintained at a current value; if the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is less than the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, the power regulator is controlled by the PID controller to increase the current electric power of the electric heating tube on the basis of the initial electric power of the electric heating tube until the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube and the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment reach a balance, so that the current electric power of the electric heating tube is maintained at the current value.

[0012] In some embodiments, it also includes: displaying at least one of the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment; wherein, when the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment have reached a balance, the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube represents the refrigeration capacity of the refrigeration equipment under the working conditions of the environment to be simulated.

[0013] In accordance with the above method, the present invention provides a simulation control device for a refrigeration device, wherein the number of the terminal cooling units of the refrigeration device is n, where n is a positive integer; a terminal heat load simulation device and a water pump are provided in conjunction with the refrigeration device; the terminal heat load simulation device is used to simulate the sum of the heat loads of the n terminal cooling units of the refrigeration device; the water pump is used to provide power for the cooling medium in the entire circuit of the terminal heat load simulation device, so that it circulates in the terminal heat load simulation device; in the case where n ≥ 2, the n terminal cooling units are arranged in parallel; the outlet of the refrigeration device is connected to the inlet of the n terminal cooling units after passing through the first switch unit; the n terminal cooling units are connected to the inlet of the n terminal cooling units. The outlet of the cooling unit is connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration equipment; the outlet of the refrigeration equipment is also connected to the inlet of the electric heating pipe after passing through the second switch unit; the outlet of the electric heating pipe and the outlets of the n terminal cooling units are merged into the inlet of the water pump; the simulation control device of the refrigeration equipment includes: a control unit, which is configured to control the first switch unit to be closed, and after the second switch unit is turned on, control the water pump to start, so that the cooling medium of the refrigeration equipment flows in the terminal heat load simulation device; the control unit is also configured to start the refrigeration equipment under the working conditions of the environment to be simulated, and preset the working conditions of the environment to be simulated. The initial electric power of the electric heating tube is controlled to turn on; the acquisition unit is configured to acquire the temperature at the inlet of the refrigeration equipment, which is recorded as the current inlet temperature of the refrigeration equipment; acquire the temperature at the outlet of the refrigeration equipment, which is recorded as the current outlet temperature of the refrigeration equipment; acquire the temperature at the inlet of the electric heating tube, which is recorded as the current inlet temperature of the electric heating tube; acquire the temperature at the outlet of the electric heating tube, which is recorded as the current outlet temperature of the electric heating tube; and acquire the mass flow rate of the cooling medium circulating in the refrigeration equipment, which is recorded as the current medium flow rate of the refrigeration equipment; the control unit is further configured to acquire the temperature at the inlet of the refrigeration equipment, which is recorded as the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current outlet temperature of the electric heating tube ... The inlet temperature, the current outlet temperature of the electric heating tube, and the current medium flow of the refrigeration equipment determine the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube; the control unit is also configured to perform PID adjustment on the initial electric power of the electric heating tube according to the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube, while the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment remains unchanged, so as to balance the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment.

[0014] In some embodiments, a first temperature detection unit is arranged at the inlet of the refrigeration equipment; a second temperature detection unit is arranged at the outlet of the refrigeration equipment; a third temperature detection unit is arranged at the inlet of the electric heating tube; a fourth temperature detection unit is arranged at the outlet of the electric heating tube; a mass flow detection unit is provided at the front end of the second switch unit; wherein, the acquisition unit acquires the temperature at the inlet of the refrigeration equipment and records it as the current inlet temperature of the refrigeration equipment, including: acquiring the temperature detected by the first temperature detection unit and recording it as the current inlet temperature of the refrigeration equipment; the acquisition unit acquires the temperature at the outlet of the refrigeration equipment and recording it as the current outlet temperature of the refrigeration equipment, including: acquiring the temperature detected by the second temperature detection unit and recording it as the current outlet temperature of the refrigeration equipment The measured temperature is recorded as the current outlet temperature of the refrigeration equipment; the acquisition unit acquires the temperature at the inlet of the electric heating tube, which is recorded as the current inlet temperature of the electric heating tube, including: acquiring the temperature detected by the third temperature detection unit, which is recorded as the current inlet temperature of the electric heating tube; the acquisition unit acquires the temperature at the outlet of the electric heating tube, which is recorded as the current outlet temperature of the electric heating tube, including: acquiring the temperature detected by the fourth temperature detection unit, which is recorded as the current outlet temperature of the electric heating tube; the acquisition unit acquires the mass flow rate of the cooling medium circulating in the refrigeration equipment, which is recorded as the current medium flow rate of the refrigeration equipment, including: acquiring the mass flow rate detected by the mass flow detection unit, which is recorded as the current medium flow rate of the refrigeration equipment.

[0015] In some embodiments, the control unit determines the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube according to the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, including: inputting the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment into a preset PLC, and using the preset A calculation model is provided for calculating the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube; wherein, the calculation model pre-set in the PLC includes: the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the corresponding relationship between the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment; and the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube.

[0016] In some embodiments, the correspondence between the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment includes: Po = qmCp (t1-t2); the correspondence between the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube includes: Pi = qmCp (t4-t3); wherein Po represents the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, qm represents the current medium flow rate of the refrigeration equipment, Cp represents the constant-pressure specific heat capacity of the cooling medium of the refrigeration equipment, t1 represents the current inlet temperature of the refrigeration equipment, t2 represents the current outlet temperature of the refrigeration equipment; Pi represents the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, t3 represents the current inlet temperature of the electric heating tube, and t4 represents the current outlet temperature of the electric heating tube.

[0017] In some embodiments, a power regulator is provided in conjunction with the electric heating tube; the power regulator is used to adjust the current electric power of the electric heating tube; the control unit, when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, performs PID adjustment on the initial electric power of the electric heating tube according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment are balanced, including: when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, PID control is performed on the power regulator of the electric heating tube according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the current electric power of the electric heating tube is adjusted by the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment are balanced.

[0018] In some embodiments, the control unit performs PID control on the power regulator of the electric heating tube according to the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube, while the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment remains unchanged. The power regulator adjusts the current electric power of the electric heating tube based on the initial electric power of the electric heating tube, so that the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube and the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment are balanced, including: Under the condition that the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, determine the relationship between the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment; if the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube = the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, then control the power regulator through the PID controller to keep the current electric power of the electric heating tube at the initial electric power of the electric heating tube, so that the cooling medium of the refrigeration equipment flows through the The heat absorption power of the electric heating tube when the cooling medium of the refrigeration equipment flows through the refrigeration equipment is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment; if the heat absorption power of the cooling medium of the refrigeration equipment when the cooling medium flows through the electric heating tube is greater than the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, the power regulator is controlled by the PID controller to reduce the current electric power of the electric heating tube on the basis of the initial electric power of the electric heating tube until the heat absorption power of the cooling medium of the refrigeration equipment when the cooling medium flows through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when the cooling medium flows through the refrigeration equipment are balanced. , so that the current electric power of the electric heating tube is maintained at the current value; if the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is less than the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, the power regulator is controlled by the PID controller to increase the current electric power of the electric heating tube on the basis of the initial electric power of the electric heating tube until the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube and the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment reach a balance, so that the current electric power of the electric heating tube is maintained at the current value.

[0019] In some embodiments, it also includes: the control unit is also configured to display at least one of the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment; wherein, when the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment have reached a balance, the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube represents the refrigeration capacity of the refrigeration equipment under the working conditions of the environment to be simulated.

[0020] Matching the above-mentioned device, the present invention provides a refrigeration device on another aspect, including: the simulation control device of the refrigeration device mentioned above.

[0021] In accordance with the above method, the present invention further provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned simulation control method for the refrigeration equipment.

[0022] Therefore, the solution of the present invention is to simulate the terminal heat load integrated device composed of a refrigeration device (such as an auxiliary refrigeration unit), multiple terminal cooling units (such as terminal cooling unit 1 to terminal cooling unit 3), and an electric heating pipe. After the outlet of the refrigeration device passes through the connecting pipe of the main road, it is connected to the branch pipe of the inlet of the multiple terminal cooling units on the one hand, and is connected to the inlet of the electric heating pipe on the other hand; the outlet of the electric heating pipe is connected to the outlet of the multiple terminal cooling units; the outlet of the multiple terminal cooling units is also connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration device; temperature sensors are set at the inlet and outlet of the refrigeration device, a first solenoid valve (such as solenoid valve 1) is set between the connecting pipe of the outlet of the refrigeration device and the inlet of the multiple terminal cooling units, a mass flow meter (such as mass flow meter 4) and a second solenoid valve (such as solenoid valve 2) are set on the pipe between the outlet of the refrigeration device and the inlet of the electric heater; temperature sensors are set at the inlet and outlet of the electric heating pipe; when controlling, after the first solenoid valve is closed and the second solenoid valve is opened, the water pump is turned on, the refrigeration device is turned on in the cruise condition, and the electric heating pipe is turned on with the initial electric power; according to the refrigeration The inlet and outlet temperatures of the equipment, the inlet and outlet temperatures of the electric heating pipe, and the mass flow rate of the refrigerant on the inlet pipeline of the electric heating pipe are used to calculate the heat release power of the refrigerant when it flows through the refrigeration equipment and the heat absorption power of the refrigerant when it flows through the electric heating pipe. The PID controller controls the power regulator of the electric heating pipe to adjust the initial electric power of the electric heating pipe in a constant electric power mode according to the heat release power of the refrigerant when it flows through the refrigeration equipment and the heat absorption power of the refrigerant when it flows through the electric heating pipe, so that the heat absorption power of the fluid in the electric heating pipe is close to and eventually equal to the real-time heat release power of the refrigeration equipment, so that the control of the refrigeration equipment is The cooling capacity and the heating power of the electric heating tube are balanced. Thus, the electric power of the electric heating tube is adjusted according to the inlet and outlet temperatures of the electric heating tube in the terminal heat load simulation device of the refrigeration equipment, the inlet and outlet temperatures of the refrigeration equipment, and the flow rate of the cooling medium so that the heat absorption power of the fluid in the electric heating tube is close to and eventually equal to the real-time heat release power of the refrigeration equipment, so that the cooling capacity of the refrigeration equipment and the heating power of the electric heating tube are balanced, which can more accurately reflect the heat absorption power of the cooling medium or refrigerant of the refrigeration equipment, and realize automatic adjustment, which saves time and simplifies the operation process.

[0023] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention.

[0024] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic flow chart of an embodiment of a simulation control method for refrigeration equipment according to the present invention;

[0026] Figure 2 1. It is a flow chart of an embodiment of performing PID control on the power regulator of the electric heating tube in the method of the present invention;

[0027] Figure 3 A schematic structural diagram of an embodiment of a simulation control device for refrigeration equipment according to the present invention;

[0028] Figure 4 A schematic structural diagram of an embodiment of an integrated device for simulating terminal heat loads of an auxiliary cooling system in an aircraft refrigeration system;

[0029] Figure 5 The present invention is a flow chart of an embodiment of a control method of an integrated device for simulating terminal heat loads of an auxiliary cooling system in an aircraft refrigeration system.

[0030] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0031] 102 - acquisition unit; 104 - control unit. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the related scheme, the terminal heat load simulation device can be realized by using an electric heating tube, and the heat absorption power of the coolant or refrigerant of the refrigeration equipment in the heat load simulation device should be controllable and have a specific value. Therefore, the actual function of the electric heating tube is to dissipate the controllable amount of heat into the coolant or refrigerant of the refrigeration equipment; the heating principle of the electric heating tube is to use the thermal effect generated by the current acting on the resistor to heat the medium, satisfying Joule's law Q=I 2 Rt, that is, the heat Q generated by the current I passing through the conductor is proportional to the square of the current I, proportional to the resistance R of the conductor, and proportional to the time t of power supply.

[0034] The heat of the electric heating tube used in the related scheme is adjusted by changing the current or voltage to adjust the electric power of the electric heating tube (P=UI=I 2 R=U 2 / R, P is power, U is voltage, I is current, R is resistance); the electric power of the electric heating tube is adjusted by changing the current or voltage, which in turn affects the thermal effect of the resistance wire of the electric heating tube, and the heated medium (such as the coolant or refrigerant of the refrigeration equipment) absorbs the heat generated by the thermal effect of the resistance wire to heat up, so the heat absorption power of the medium (such as the coolant or refrigerant of the refrigeration equipment) is also changed accordingly, that is, the heat absorption power of the coolant or refrigerant of the refrigeration equipment is indirectly reflected by controlling the electric power of the electric heating tube.

[0035] In addition, for the performance verification test of the refrigeration equipment designed and developed, if it is necessary to use electric heating tubes to heat the refrigerant or coolant of the refrigeration equipment to simulate the heat load of the terminal load of the refrigeration equipment, industrial electric heating tubes generally adopt two control methods, namely the fixed outlet temperature control method and the fixed electric power control method.

[0036] Among them, the control method of the fixed outlet temperature is to use the temperature of the medium at the outlet of the electric heating tube (that is, the refrigerant or coolant of the refrigeration equipment) as the tracking quantity. When the medium temperature at the outlet of the electric heating tube is lower than the set temperature, the electric power of the electric heating tube is increased by adjusting the current of the electric heating tube (or the control voltage or resistance). When the medium temperature at the outlet of the electric heating tube exceeds the set temperature, the current of the electric heating tube (or the control voltage or resistance) is adjusted to reduce the electric power of the electric heating tube, so that the medium temperature at the outlet of the electric heating tube is basically maintained near the set temperature. The error range between the medium temperature at the outlet of the electric heating tube and the set temperature is controlled according to the type and accuracy of the controller of the electric heating tube. For example, the error range between the medium temperature at the outlet of the common electric heating tube and the set temperature is generally ±0.5℃~±2℃.

[0037] The constant electric power control method also adopts closed-loop control logic based on temperature feedback. It is necessary to set a temperature in advance. When the temperature of the medium (i.e. the refrigerant or coolant of the refrigeration equipment) is lower than the set temperature, the electric heating tube heats the medium with a constant electric power. When the medium temperature exceeds the set temperature, the electric heating tube will be powered off and stop heating. Through continuous feedback and adjustment process, the control system of the electric heating tube can maintain the temperature of the heating medium close to the set target temperature and realize constant electric power heating control of the electric heating tube.

[0038] However, for refrigeration equipment performance verification tests, these two control methods not only require manual adjustment and control, but also have certain errors. Because the temperature of the medium entering the electric heating tube is uncertain, and the cooling capacity of the refrigeration equipment is a target quantity that needs to be verified in practice, the fixed outlet temperature control method cannot determine the specific medium temperature at the electric heating tube outlet according to P = qmCpΔt, so it is impossible to use the electric heating tube outlet temperature as a tracking variable for fixed outlet temperature control. In the fixed power control method, it is also impossible to set a specific power in advance. Therefore, whether in the control mode of fixed outlet temperature or in the control mode of fixed electric power, it is necessary to set an initial value, and then manually calculate the cooling capacity of the refrigeration equipment and the heating power of the electric heating tube according to the feedback of the control system of the terminal heat load simulation device, and continuously adjust the set value according to the gap between the two, and finally reach a balanced state; and since the heating capacity of the electric heating tube cannot be completely absorbed by the fluid (that is, the refrigerant or coolant of the refrigeration equipment), that is, the electric power of the electric heating tube is not equal to the heating power of the electric heating tube, both control methods require a lot of calculations and manual adjustments, which will take a lot of time and cannot display the heating power in real time. There is an urgent need for a terminal heat load simulation device that can automatically adjust and display the heating power according to the fluid flow and temperature.

[0039] It is taken into consideration that the terminal heat load simulation device of the refrigeration equipment can be implemented using an electric heating tube, but the control of the heating power of the electric heating tube in the related scheme requires calculation and manual adjustment of the heating power of the electric heating tube in the terminal heat load simulation device of the refrigeration equipment to balance it with the cooling capacity of the refrigeration equipment. Therefore, the solution of the present invention provides a simulation control method for a refrigeration equipment, specifically a control method for a terminal heat load simulation integrated device of a refrigeration equipment, by receiving signals from the temperature sensors and mass flow meters arranged at the inlet and outlet of the electric heating tube in the terminal heat load simulation device of the refrigeration equipment and the inlet and outlet of the refrigeration equipment, and using a PLC (programmable logic controller) to calculate the real-time heat absorption power of the fluid in the electric heating tube and the real-time heat release power in the refrigeration equipment, and then using a PID controller with the real-time heat release power of the fluid in the refrigeration equipment as the set value to adjust the electric power of the electric heating tube so that the heat absorption power of the fluid in the electric heating tube is close to and eventually equal to the real-time heat release power of the refrigeration equipment, so that the cooling capacity of the refrigeration equipment and the heating power of the electric heating tube are balanced, which can more accurately reflect the heat absorption power of the coolant or refrigerant of the refrigeration equipment, and at the same time, the degree of automation is also higher.

[0040] According to an embodiment of the present invention, a simulation control method for a refrigeration device is provided. Figure 1The flowchart of an embodiment of the method of the present invention is shown. The number of terminal cooling units of the refrigeration equipment is n, where n is a positive integer. A terminal heat load simulation device and a water pump are provided in conjunction with the refrigeration equipment. The terminal heat load simulation device is used to simulate the sum of the heat loads of the n terminal cooling units of the refrigeration equipment. The water pump is used to provide power to the cooling medium in the entire circuit of the terminal heat load simulation device, causing it to circulate within the terminal heat load simulation device. Figure 4 This is a schematic diagram of the structure of an embodiment of an integrated device for simulating the terminal heat load of the auxiliary cooling system in an aircraft cooling system. Figure 4 The auxiliary cooling unit in the n terminal cooling units are as follows Figure 4 Terminal cooling unit 1, terminal cooling unit 2, and terminal cooling unit 3 are included in the system. When n ≥ 2, the n terminal cooling units are connected in parallel. The outlet of the refrigeration device is connected to the inlet of the n terminal cooling units after passing through a first switch unit. The outlet of the n terminal cooling units is connected to the inlet of the water pump. The outlet of the water pump is connected to the inlet of the refrigeration device. The outlet of the refrigeration device is further connected to the inlet of the electric heating pipe after passing through a second switch unit. The outlet of the electric heating pipe and the outlets of the n terminal cooling units are all connected to the inlet of the water pump. In other words, the outlets of the electric heating pipe and the other terminal cooling units are all connected to the inlet of the water pump.

[0041] Specifically, the main trunk of the connecting pipeline at the outlet of the refrigeration equipment is divided into a first branch and a second branch, the first branch is divided into n sub-branches, each sub-branch is connected to the inlet of a corresponding terminal cooling unit in the n terminal cooling units; the connecting pipelines at the outlet of each terminal cooling unit in the n terminal cooling units are merged to form a merged pipeline, and then connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration equipment; the second branch is connected to the inlet of the electric heating pipe, and the outlet of the electric heating pipe is connected to the merged pipeline, such as the second branch is connected to the inlet of the heat exchange medium pipeline in the electric heating pipe, and the outlet of the heat exchange medium pipeline in the electric heating pipe is connected to the merged pipeline; a first switch unit (such as a solenoid valve 1) is provided on the first branch, along the flow direction of the cooling medium of the refrigeration equipment, a mass flow detection unit and a second switch unit are provided on the second branch, the mass flow detection unit such as Figure 4 The mass flow meter 4 and the second switching unit are such as the solenoid valve 2.

[0042] Aircraft cooling systems consist of two main components: the environmental control system (ECC) that provides comfort air to the passenger cabin and cockpit, and the auxiliary cooling system (also known as the auxiliary cooling system) that cools electronic equipment, galley units, controllers, and hydraulic pumps. Terminal cooling units on large passenger aircraft typically contain high-power electronic equipment, galley equipment, hydraulic pumps, and controller units. Figure 4 The present invention shows an integrated terminal thermal load simulation device (test prototype) for the auxiliary cooling system of an aircraft refrigeration system. This device is used to verify the cooling capacity of the auxiliary cooling unit (i.e., the refrigeration unit of the auxiliary cooling system). Compared to the performance verification methods in related solutions, the present invention provides a terminal thermal load simulation device. Sensors (such as temperature sensors and mass flow meters) are located at the inlet and outlet of the electric heating pipes and at the inlet and outlet of the refrigeration equipment in the terminal thermal load simulation device. The device simulates the thermal load by receiving signals from the temperature sensors and mass flow meters located at the inlet and outlet of the electric heating pipes and the refrigeration equipment. A PLC (programmable logic controller), PID controller, and power regulator are used to automatically control the heating power of the electric heater based on the fluid flow and temperature. In contrast, the thermal load simulation device in related solutions does not include sensors (such as temperature sensors and mass flow meters) located at the inlet and outlet of the electric heating pipes and at the inlet and outlet of the refrigeration equipment in the terminal thermal load simulation device, and does not utilize a PLC to calculate the received sensor signals.

[0043] against Figure 4 The illustrated integrated device for simulating the terminal heat load of the auxiliary cooling system in an aircraft refrigeration system provides two options for verifying the performance of this auxiliary cooling unit. One option is to open solenoid valve 1 and close solenoid valve 2. After the auxiliary cooling unit is started, terminal cooling units 1, 2, and 3 are each subjected to their own specified heat loads. When the refrigerant flowing from the terminal cooling unit outlet to the auxiliary cooling unit inlet stabilizes at a certain state, the cooling capacity of the auxiliary cooling unit under this set operating condition is the sum of the heat loads borne by terminal cooling units 1, 2, and 3. The other option is to close solenoid valve 1 and open solenoid valve 2. Using a terminal heat load simulation device, the sum of all heat loads is directly simulated to determine the cooling capacity of the auxiliary cooling unit. Obviously, option 1 is more complex and requires manual calculations, with unreliable accuracy. Option 2, on the other hand, offers high control precision, a higher degree of automation, and simpler operation. The present invention primarily verifies the performance of the auxiliary cooling unit based on option 2.

[0044] like Figure 4 As shown, in the solution of the present invention, the simulation control method of the refrigeration equipment includes: steps S110 to S150.

[0045] In step S110, after the first switch unit is controlled to be closed and the second switch unit is controlled to be opened, the water pump is controlled to be opened so that the cooling medium of the refrigeration equipment flows in the terminal heat load simulation device. Specifically, Figure 5 This is a flow chart of an embodiment of a control method for a terminal heat load simulation integrated device of an auxiliary cooling system in an aircraft refrigeration system, and the auxiliary cooling unit performance verification and its control logic are as follows: Figure 5As shown. Figure 5 As shown, the control method of the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system includes: step 1, first, closing the solenoid valve 1, opening the solenoid valve 2, starting the water pump, and then executing step 2.

[0046] At step S120, the refrigeration device is turned on according to the working conditions of the environment to be simulated, and the electric heating tube is controlled to be turned on according to the initial electric power preset under the working conditions of the environment to be simulated. The working conditions of the environment to be simulated, such as cruising conditions. Specifically, Figure 5 As shown, the control method for the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system further includes: Step 2: After the refrigerant of the auxiliary cooling system in the aircraft refrigeration system begins to flow throughout the terminal heat load simulation integrated device, the auxiliary cooling unit is started under cruise conditions, and the electric heating pipe is turned on with an initial electric power e, after which Step 3 is executed. The initial electric power e is 110% of the auxiliary cooling unit's design cooling capacity under cruise conditions.

[0047] At step S130, the temperature at the inlet of the refrigeration equipment is obtained, which is recorded as the current inlet temperature of the refrigeration equipment, and the auxiliary cooling unit inlet temperature sensor Tc,in reads the auxiliary cooling unit inlet real-time temperature t1; the temperature at the outlet of the refrigeration equipment is obtained, which is recorded as the current outlet temperature of the refrigeration equipment, such as the auxiliary cooling unit outlet temperature sensor Tc,out reads the auxiliary cooling unit outlet real-time temperature t2; the temperature at the inlet of the electric heating pipe is obtained, which is recorded as the current inlet temperature of the electric heating pipe, such as the electric heating pipe inlet temperature sensor Th,in reads the electric heating pipe inlet real-time temperature t3; the temperature at the outlet of the electric heating pipe is obtained, which is recorded as the current outlet temperature of the electric heating pipe, such as the electric heating pipe outlet temperature sensor Th,out reads the electric heating pipe outlet real-time temperature t4; and the mass flow rate of the cooling medium circulating in the refrigeration equipment is obtained, which is recorded as the current medium flow rate of the refrigeration equipment, such as the real-time mass flow rate qm of the cooling medium circulating.

[0048] In some embodiments, a first temperature detection unit, such as an auxiliary cooling unit inlet temperature sensor Tc,in, is arranged at the inlet of the refrigeration device; a second temperature detection unit, such as an auxiliary cooling unit outlet temperature sensor Tc,out, is arranged at the outlet of the refrigeration device; a third temperature detection unit, such as an electric heating tube inlet temperature sensor Th,in, is arranged at the inlet of the electric heating tube; a fourth temperature detection unit, such as an electric heating tube outlet temperature sensor Th,out, is arranged at the outlet of the electric heating tube; a mass flow detection unit is provided at the front end of the second switch unit, that is, the outlet of the refrigeration device is connected to the inlet of the electric heating tube after passing through the mass flow detection unit and the second switch unit. The front end of the second switch unit is the location of the inlet of the second switch unit along the flow direction of the cooling medium of the refrigeration device; correspondingly, the location of the outlet of the second switch unit along the flow direction of the cooling medium of the refrigeration device is the rear end of the second switch unit.

[0049] like Figure 4 As shown, the terminal thermal load simulation integrated device for the auxiliary cooling system in an aircraft refrigeration system includes: an auxiliary cooling unit, terminal cooling units 1, 2, and 3, an electric heating pipe, a water pump, solenoid valves 1 and 2, mass flow meters 1, 2, 3, and 4, an absolute pressure transmitter P, an electric heating pipe inlet temperature sensor Th,in, an electric heating pipe outlet temperature sensor Th,out, an auxiliary cooling unit inlet temperature sensor Tc,in, an auxiliary cooling unit outlet temperature sensor Tc,out, a PID controller, a power regulator, and a programmable logic controller (PLC). The auxiliary cooling unit is used to perform refrigeration functions, cooling terminal cooling units 1, 2, and 3. The water pump provides power for fluid flow in the terminal thermal load simulation integrated device for the auxiliary cooling system in the entire aircraft refrigeration system. The absolute pressure transmitter P is used to monitor fluid pressure to ensure safe operation of the cooling medium in the terminal thermal load simulation integrated device.

[0050] exist Figure 4In the example shown, the outlet of the auxiliary cooling unit for realizing the refrigeration function is respectively connected to the inlet of the terminal cooling unit 1, the inlet of the terminal cooling unit 2, the inlet of the terminal cooling unit 3, and the inlet of the electric heating pipe, wherein the auxiliary cooling unit outlet temperature sensor Tc,out and the solenoid valve 1 are respectively arranged on the pipeline trunk line connecting the outlet of the auxiliary cooling unit with the inlet of the terminal cooling unit 1, the inlet of the terminal cooling unit 2, and the inlet of the terminal cooling unit 3, and the mass flowmeter 1, the mass flowmeter 2, and the mass flowmeter 3 are respectively arranged on the pipeline branches connecting the outlet of the auxiliary cooling unit with the inlet of the terminal cooling unit 1, the inlet of the terminal cooling unit 2, and the inlet of the terminal cooling unit 3, and the mass flowmeter 4, the solenoid valve 2, the absolute pressure transmitter P and the electric heating pipe inlet temperature sensor Th,in are arranged in sequence on the pipeline connecting the outlet of the auxiliary cooling unit with the inlet of the electric heating pipe. The outlets of terminal cooling units 1, 2, and 3 are first connected to the outlet of the electric heating pipe and then to the water pump inlet. The outlet pipe of the electric heating pipe is equipped with an outlet temperature sensor, Th,out. Finally, the outlet of the water pump, which powers the fluid flow in the terminal thermal load simulation integrated device for the auxiliary cooling system within the entire aircraft refrigeration system, is connected to the inlet of the auxiliary cooling unit. The inlet pipe of the auxiliary cooling unit is equipped with an inlet temperature sensor, Tc,in.

[0051] In particular, obtaining the temperature at the inlet of the refrigeration device in step S130, which is recorded as the current inlet temperature of the refrigeration device, includes: obtaining the temperature detected by the first temperature detection unit, which is recorded as the current inlet temperature of the refrigeration device. Obtaining the temperature at the outlet of the refrigeration device in step S130, which is recorded as the current outlet temperature of the refrigeration device, includes: obtaining the temperature detected by the second temperature detection unit, which is recorded as the current outlet temperature of the refrigeration device. Obtaining the temperature at the inlet of the electric heating pipe in step S130, which is recorded as the current inlet temperature of the electric heating pipe, includes: obtaining the temperature detected by the third temperature detection unit, which is recorded as the current inlet temperature of the electric heating pipe. Obtaining the temperature at the outlet of the electric heating pipe in step S130, which is recorded as the current outlet temperature of the electric heating pipe, includes: obtaining the temperature detected by the fourth temperature detection unit, which is recorded as the current outlet temperature of the electric heating pipe. In step S130, the mass flow rate of the coolant medium circulating in the refrigeration equipment is obtained and recorded as the current medium flow rate of the refrigeration equipment, including: obtaining the mass flow rate detected by the mass flow detection unit and recording it as the current medium flow rate of the refrigeration equipment, such as the real-time mass flow rate qm of the coolant circulation.

[0052] Specifically, if Figure 5As shown, the control method of the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system also includes: Step 3, after the auxiliary cooling unit is turned on in the cruise condition and the electric heating tube is turned on with the initial electric power e, the circulating refrigerant releases heat (heat release power is Po) when flowing through the auxiliary cooling unit and absorbs heat (heat absorption power is Pi) when flowing through the electric heating tube. The auxiliary cooling unit inlet temperature sensor Tc,in reads the auxiliary cooling unit inlet real-time temperature t1, the auxiliary cooling unit outlet temperature sensor Tc,out reads the auxiliary cooling unit outlet real-time temperature t2, the mass flow meter 4 reads the real-time mass flow rate qm of the refrigerant circulating in the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system, the electric heating pipe inlet temperature sensor Th,in reads the electric heating pipe inlet real-time temperature t3, and the electric heating pipe outlet temperature sensor Th,out reads the electric heating pipe outlet real-time temperature t4. The five data of the auxiliary cooling unit inlet real-time temperature t1, the auxiliary cooling unit outlet real-time temperature t2, the real-time mass flow rate qm of the refrigerant circulation, the electric heating pipe inlet real-time temperature t3 and the electric heating pipe outlet real-time temperature t4 are transmitted to the PLC in the form of electrical signals, and then step 4 is executed.

[0053] At step S140, based on the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment and the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube are determined, such as determining whether the cooling medium releases heat when flowing through the auxiliary cooling unit (heat release power is Po) and absorbs heat when flowing through the electric heating tube (heat absorption power is Pi).

[0054] Among them, for the thermal load simulation device of the auxiliary cooling unit, the refrigerant medium flows inside the auxiliary cooling unit itself (refrigeration equipment), and the refrigerant medium absorbs heat. The cooling medium flows in the circuit of the terminal thermal load simulation integrated device, and the cooling medium releases heat. The cooling medium also absorbs heat in the electric heating tube.

[0055] In some embodiments, in step S140, the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube are determined based on the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, including: inputting the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment into a preset PLC, and using a calculation model (such as a calculation formula) pre-set in the PLC to calculate the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube.

[0056] Among them, the calculation model pre-set in the PLC includes: the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the corresponding relationship between the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment; and the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube.

[0057] In the solution of the present invention, by receiving the signals of the temperature sensors and mass flow meters arranged at the inlet and outlet of the electric heating tube and the inlet and outlet of the refrigeration equipment in the terminal heat load simulation device of the refrigeration equipment, a PLC (programmable logic controller) is used to calculate the real-time heat absorption power of the fluid in the electric heating tube and the real-time heat release power in the refrigeration equipment, and then a PID controller is used to adjust the electric power of the electric heating tube with the real-time heat release power of the fluid in the refrigeration equipment as the set value to make the heat absorption power of the fluid in the electric heating tube close to and eventually equal to it. At this time, the heat absorption power of the electric heating tube is the cooling capacity of the refrigeration equipment under this working condition. Compared with the traditional performance verification method, the solution of the present invention can more accurately reflect the heat absorption power of the coolant or refrigerant of the refrigeration equipment, and the degree of automation is also higher.

[0058] In some embodiments, the correspondence between the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment includes: Po = qmCp (t1-t2).

[0059] The corresponding relationship between the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube includes: Pi = qmCp (t4-t3).

[0060] Among them, Po represents the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, qm represents the current medium flow rate of the refrigeration equipment, Cp represents the constant-pressure specific heat capacity of the cooling medium of the refrigeration equipment, t1 represents the current inlet temperature of the refrigeration equipment, and t2 represents the current outlet temperature of the refrigeration equipment; Pi represents the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube, t3 represents the current inlet temperature of the electric heating tube, and t4 represents the current outlet temperature of the electric heating tube.

[0061] Specifically, if Figure 5 As shown, the control method for the terminal heat load simulation integrated device of the auxiliary cooling system in an aircraft refrigeration system further includes: Step 4, in the PCL, the heat release power Po = qmCp(t1-t2) of the brine when flowing through the auxiliary cooling unit and the heat absorption power Pi = qmCp(t4-t3) of the brine when flowing through the electric heating tube can be calculated, and then Step 5 is executed. Wherein, Cp represents the constant pressure specific heat capacity of the medium, which varies for different media; Cp is mainly affected by the type and state of the medium and is less affected by temperature.

[0062] At step S150, when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the initial electric power of the electric heating tube is PID-adjusted according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is balanced with the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment.

[0063] The solution of the present invention provides a control method for a terminal heat load simulation integrated device of a refrigeration equipment. The method simulates the heat load by receiving signals from the temperature sensors and mass flow meters arranged at the inlet and outlet of the electric heating tube in the terminal heat load simulation device of the refrigeration equipment and at the inlet and outlet of the refrigeration equipment (such as temperature sensors, mass flow meters, etc.). The method automatically controls the heating power of the electric heater according to the fluid flow and temperature using a PLC (programmable logic controller), a PID controller and a power regulator, automatically adjusts and displays the heating power of the electric heater, adjusts and displays the heat absorption power of the medium in real time, and quickly reaches system balance. The displayed value at balance is the refrigeration capacity of the refrigeration equipment, so as to measure the refrigeration capacity of the refrigeration equipment and more accurately reflect the heat absorption power of the coolant or refrigerant of the refrigeration equipment.

[0064] In some embodiments, a power regulator is provided in conjunction with the electric heating tube; the power regulator is used to adjust the current electric power of the electric heating tube.

[0065] In step S150, when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the initial electric power of the electric heating tube is PID-adjusted according to the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube, so that the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, including: when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the power regulator of the electric heating tube is PID-controlled according to the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube, so that the current electric power of the electric heating tube is adjusted by the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment.

[0066] In the solution of the present invention, the control target is the fluid heat absorption power (i.e., the heat absorption power Pi of the refrigerant when flowing through the electric heating tube), the control method is PLC, PID controller, and the implementation method is to adjust the electric power of the electric heating tube; by adjusting the electric power of the electric heating tube (such as the initial electric power e of the electric heating tube), the control target is achieved, and the heating power is automatically adjusted according to the fluid flow rate and temperature, which can solve the problems of complicated control methods for the fluid heat absorption of the thermal load simulation device, low control accuracy, and long verification time.

[0067] In some embodiments, when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the power regulator of the electric heating tube is PID controlled according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the current electric power of the electric heating tube is adjusted by the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment are balanced. For the specific process, please refer to the following exemplary description.

[0068] The following combination Figure 2 The flowchart of an embodiment of the method of the present invention for performing PID control on the power regulator of the electric heating tube further illustrates the specific process of performing PID control on the power regulator of the electric heating tube in step S150, including: steps S210 to S240.

[0069] Step S210, when the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, determine the relationship between the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment.

[0070] Step S220, if the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube = the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, then the power regulator is controlled by the PID controller to keep the current electric power of the electric heating tube at the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment are balanced.

[0071] Step S230, if the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is greater than the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, the power regulator is controlled by the PID controller to reduce the current electric power of the electric heating tube based on the initial electric power of the electric heating tube until the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment reach a balance, so that the current electric power of the electric heating tube is maintained at the current value.

[0072] Step S240, if the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is less than the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, the power regulator is controlled by the PID controller to increase the current electric power of the electric heating tube on the basis of the initial electric power of the electric heating tube until the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube and the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment reach a balance, so that the current electric power of the electric heating tube is maintained at the current value.

[0073] Specifically, if Figure 5 As shown, the control method for the terminal heat load simulation integrated device of the auxiliary cooling system in an aircraft refrigeration system also includes: Step 5, the PLC then transmits the two calculated values ​​(i.e., the heat release power Po of the brine when flowing through the auxiliary cooling unit, and the heat absorption power Pi of the brine when flowing through the electric heating tube) to the PID controller in the form of signals. Since the auxiliary cooling unit is started in a cyclical mode, the cooling capacity of the auxiliary cooling unit is fixed. Therefore, the heat release power Po of the brine when flowing through the auxiliary cooling unit is used as the set value to control the power regulator of the electric heating tube to adjust the initial electric power e of the electric heating tube in a constant electric power manner. The control logic is as follows:

[0074] When the heat absorption power Pi of the refrigerant when flowing through the electric heating tube equals the heat release power Po of the refrigerant when flowing through the auxiliary cooling unit, the PID controller controls the power regulator to adjust the initial electric power e of the electric heating tube to keep it stable.

[0075] When the heat absorption power Pi of the refrigerant flowing through the electric heating tube exceeds the heat release power Po of the refrigerant flowing through the auxiliary cooling unit, the PID controller controls the power regulator to reduce the initial power e of the electric heating tube until Pi equals the heat release power Po of the refrigerant flowing through the auxiliary cooling unit. Here, the analog signal (4-20mA, 0-5V, etc.) output by the PID controller controls the SCR (silicon controlled resistor) power regulator. Based on the analog signal received, the SCR power regulator adjusts the voltage, current, and power of the electric heating tube by controlling the conduction angle of the thyristor, etc. The PID controller controls the power regulator to reduce the initial power e of the electric heating tube. Specifically, the PID controller can output a smaller analog signal, such as 6mA, which causes the SCR power regulator to control the conduction angle of the thyristor to decrease, outputting a smaller current, and correspondingly reducing the power e.

[0076] When the heat absorption power Pi of the refrigerant flowing through the electric heating tube is less than the heat release power Po of the refrigerant flowing through the auxiliary cooling unit, the PID controller controls the power regulator to increase the initial power e of the electric heating tube until the heat absorption power Pi of the refrigerant flowing through the electric heating tube equals the heat release power Po of the refrigerant flowing through the auxiliary cooling unit. Here, the analog signal (4-20mA, 0-5V, etc.) output by the PID controller controls the SCR (silicon controlled resistor) power regulator. Based on the analog signal, the SCR power regulator adjusts the voltage, current, and power of the electric heating tube by controlling the conduction angle of the thyristor (SCR). Specifically, the PID controller controls the power regulator to increase the initial power e of the electric heating tube by outputting a larger analog signal, such as 18mA, which causes the SCR power regulator to increase the conduction angle of the SCR, outputting a larger current, and correspondingly increasing the power e.

[0077] In some embodiments, the simulation control method for a refrigeration device according to the solutions of the present invention further includes: displaying at least one of the heat absorption power of the refrigeration device when the cooling medium flows through the electric heating tube and the heat release power of the refrigeration device when the cooling medium flows through the refrigeration device. When the heat absorption power of the refrigeration device when the cooling medium flows through the electric heating tube and the heat release power of the refrigeration device when the cooling medium flows through the refrigeration device have reached equilibrium, the heat absorption power of the refrigeration device when the cooling medium flows through the electric heating tube represents the refrigeration capacity of the refrigeration device under the operating conditions of the environment to be simulated.

[0078] Specifically, if Figure 5 As shown, the control method of the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system further includes: after step 5, when the heat absorption power Pi of the brine when flowing through the electric heating tube equals the heat release power Po of the brine when flowing through the auxiliary cooling unit, the heat absorption power Pi of the brine when flowing through the electric heating tube (or the heat release power Po of the brine when flowing through the auxiliary cooling unit) calculated by the PLC (programmable logic controller) is the cooling capacity of the auxiliary cooling unit under the cruise condition.

[0079] Under other working conditions, it is sufficient to change the initial electric power e of the electric heating tube, and this adjustment will only affect the adjustment time. The opening order of the auxiliary cooling unit and the electric heating tube can be interchanged. Among them, for the research and development of engineering products, it is generally the design working condition and the verification working condition. For the development of the auxiliary cooling system, that is, the number of terminal cooling units has increased by one or the heat load of one unit has increased. Specifically, it can be divided into ground, takeoff, climb, descent and landing working conditions. In addition, in the solution of the present invention, the tracking quantity of the PID controller of the electric heating tube is two calculated quantities, namely temperature and flow.

[0080] The solution of the present invention can be applied to performance verification tests during the development of refrigeration equipment with a large number of terminal loads, such as aircraft auxiliary cooling systems. As long as the refrigerant or coolant of the refrigeration equipment can be heated by the electric heating tube and a heat exchange circuit can be formed between the electric heating tube and the coolant, the terminal heat load simulation device can be used to verify the cooling capacity of the refrigeration equipment. However, different refrigeration equipment has different cooling capacities, so the size and maximum heating power of the electric heating tube in the terminal heat load simulation device of different refrigeration equipment will be different. Among them, the heat exchange circuit here refers to the circuit formed by the coolant of the refrigeration system of the refrigeration equipment being connected to the inlet and outlet of the electric heating tube through a connection method such as a pipeline. In the solution of the present invention, the test for verifying the product performance of the refrigeration equipment is carried out by recording data at the inlet and outlet of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment, and sensors (such as temperature sensors, mass flow meters, etc.) arranged at the inlet and outlet of the refrigeration equipment, and calculating the heating power of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment by editing the formula P=qmCpΔt on the computer through Excel. When the operating condition of the refrigeration equipment changes, the heating power of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment can be automatically adjusted to balance the heating power of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment with the cooling capacity of the refrigeration equipment. The operation is simpler and the time of performance verification test in the development process of refrigeration equipment with a large number of terminal loads, such as aircraft auxiliary cooling systems, is greatly shortened.

[0081] According to the technical solution of this embodiment, a terminal heat load simulation integrated device consisting of a refrigeration device (such as an auxiliary refrigeration unit), multiple terminal cooling units (such as terminal cooling units 1 to terminal cooling units 3), and an electric heating pipe is used. The outlet of the refrigeration device is connected to the branch pipe of the inlet of the multiple terminal cooling units through the connecting pipe of the main line on the one hand, and is connected to the inlet of the electric heating pipe on the other hand; the outlet of the electric heating pipe is connected to the outlet of the multiple terminal cooling units; the outlet of the multiple terminal cooling units is also connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration device; temperature sensors are set at the inlet and outlet of the refrigeration device, a first solenoid valve (such as solenoid valve 1) is set between the connecting pipe of the outlet of the refrigeration device and the inlet of the multiple terminal cooling units, a mass flow meter (such as mass flow meter 4) and a second solenoid valve (such as solenoid valve 2) are set on the pipe between the outlet of the refrigeration device and the inlet of the electric heater; temperature sensors are set at the inlet and outlet of the electric heating pipe; during control, after the first solenoid valve is closed and the second solenoid valve is opened, the water pump is turned on, the refrigeration device is turned on in the cruise condition, and the electric heating pipe is turned on with the initial electric power; according to the system The inlet and outlet temperatures of the refrigeration equipment, the inlet and outlet temperatures of the electric heating pipe, and the mass flow rate of the refrigerant on the inlet pipe of the electric heating pipe are used to calculate the heat release power of the refrigerant when it flows through the refrigeration equipment and the heat absorption power of the refrigerant when it flows through the electric heating pipe. The PID controller controls the power regulator of the electric heating pipe to adjust the initial electric power of the electric heating pipe in a constant electric power mode according to the heat release power of the refrigerant when it flows through the refrigeration equipment and the heat absorption power of the refrigerant when it flows through the electric heating pipe, so that the heat absorption power of the fluid in the electric heating pipe is close to and eventually equal to the real-time heat release power of the refrigeration equipment, so that the refrigeration equipment The cooling capacity and the heating power of the electric heating tube are balanced. Thus, by adjusting the inlet and outlet temperatures of the electric heating tube in the terminal heat load simulation device of the refrigeration equipment, the inlet and outlet temperatures of the refrigeration equipment, and the flow rate of the cooling medium, the electric power of the electric heating tube is made to make the heat absorption power of the fluid in the electric heating tube close to and eventually equal to the real-time heat release power of the refrigeration equipment, so that the cooling capacity of the refrigeration equipment and the heating power of the electric heating tube are balanced, which can more accurately reflect the heat absorption power of the cooling medium or refrigerant of the refrigeration equipment, and realize automatic adjustment, save time and simplify the operation process.

[0082] According to an embodiment of the present invention, a simulation control device for refrigeration equipment corresponding to the simulation control method for refrigeration equipment is also provided. Figure 3The schematic diagram of the structure of an embodiment of the apparatus of the present invention is shown. The number of terminal cooling units of the refrigeration equipment is n, where n is a positive integer. A terminal heat load simulation device and a water pump are provided in conjunction with the refrigeration equipment. The terminal heat load simulation device is used to simulate the sum of the heat loads of the n terminal cooling units of the refrigeration equipment. The water pump is used to provide power for the cooling medium in the entire circuit of the terminal heat load simulation device, causing it to circulate within the terminal heat load simulation device. Figure 4 This is a schematic diagram of the structure of an embodiment of an integrated device for simulating the terminal heat load of the auxiliary cooling system in an aircraft cooling system. Figure 4 The auxiliary cooling unit in the n terminal cooling units are as follows Figure 4 Terminal cooling unit 1, terminal cooling unit 2, and terminal cooling unit 3 in the embodiment. When n ≥ 2, the n terminal cooling units are arranged in parallel; the outlet of the refrigeration device is connected to the inlet of the n terminal cooling units after passing through the first switch unit; the outlet of the n terminal cooling units is connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration device; the outlet of the refrigeration device is further connected to the inlet of the electric heating pipe after passing through the second switch unit; the outlet of the electric heating pipe and the outlets of the n terminal cooling units are combined to merge into the inlet of the water pump.

[0083] Specifically, the main trunk of the connecting pipeline at the outlet of the refrigeration equipment is divided into a first branch and a second branch, the first branch is divided into n sub-branches, each sub-branch is connected to the inlet of a corresponding terminal cooling unit in the n terminal cooling units; the connecting pipelines at the outlet of each terminal cooling unit in the n terminal cooling units are merged to form a merged pipeline, and then connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration equipment; the second branch is connected to the inlet of the electric heating pipe, and the outlet of the electric heating pipe is connected to the merged pipeline, such as the second branch is connected to the inlet of the heat exchange medium pipeline in the electric heating pipe, and the outlet of the heat exchange medium pipeline in the electric heating pipe is connected to the merged pipeline; a first switch unit (such as a solenoid valve 1) is provided on the first branch, along the flow direction of the cooling medium of the refrigeration equipment, a mass flow detection unit and a second switch unit are provided on the second branch, the mass flow detection unit such as Figure 4 The mass flow meter 4 and the second switching unit are such as the solenoid valve 2.

[0084] Aircraft cooling systems consist of two main components: the environmental control system (ECC) that provides comfort air to the passenger cabin and cockpit, and the auxiliary cooling system (also known as the auxiliary cooling system) that cools electronic equipment, galley units, controllers, and hydraulic pumps. Terminal cooling units on large passenger aircraft typically contain high-power electronic equipment, galley equipment, hydraulic pumps, and controller units. Figure 4The present invention shows an integrated terminal thermal load simulation device (test prototype) for the auxiliary cooling system of an aircraft refrigeration system. This device is used to verify the cooling capacity of the auxiliary cooling unit (i.e., the refrigeration unit of the auxiliary cooling system). Compared to the performance verification methods in related solutions, the present invention provides a terminal thermal load simulation device. Sensors (such as temperature sensors and mass flow meters) are located at the inlet and outlet of the electric heating pipes and at the inlet and outlet of the refrigeration equipment in the terminal thermal load simulation device. The device simulates the thermal load by receiving signals from the temperature sensors and mass flow meters located at the inlet and outlet of the electric heating pipes and the refrigeration equipment. A PLC (programmable logic controller), PID controller, and power regulator are used to automatically control the heating power of the electric heater based on the fluid flow and temperature. In contrast, the thermal load simulation device in related solutions does not include sensors (such as temperature sensors and mass flow meters) located at the inlet and outlet of the electric heating pipes and at the inlet and outlet of the refrigeration equipment in the terminal thermal load simulation device, and does not utilize a PLC to calculate the received sensor signals.

[0085] against Figure 4 The illustrated integrated device for simulating the terminal thermal load of the auxiliary cooling system in an aircraft refrigeration system has two options for verifying the performance of the auxiliary cooling unit. One option is to open solenoid valve 1 and close solenoid valve 2. After the auxiliary cooling unit is started, terminal cooling units 1, 2, and 3 are each subjected to their own specified thermal loads. When the refrigerant flowing from the terminal cooling unit outlet to the auxiliary cooling unit inlet stabilizes at a certain state, the cooling capacity of the auxiliary cooling unit under this set operating condition is the sum of the thermal loads borne by terminal cooling units 1, 2, and 3. The other option is to close solenoid valve 1 and open solenoid valve 2. A terminal thermal load simulation device directly simulates the sum of all thermal loads to determine the cooling capacity of the auxiliary cooling unit. Obviously, option 1 is more complex and requires manual calculation, with limited accuracy. Option 2, on the other hand, offers high control precision, a higher degree of automation, and simpler operation. The present invention primarily relies on option 2 to verify the performance of the auxiliary cooling unit. The simulation control device for the refrigeration equipment includes an acquisition unit 102 and a control unit 104.

[0086] The control unit 104 is configured to control the first switch unit to be closed and the second switch unit to be opened, and then control the water pump to be opened, so that the cooling medium of the refrigeration equipment flows in the terminal heat load simulation device. The specific functions and processing of the control unit 104 are shown in step S110. Specifically, Figure 5 This is a flow chart of an embodiment of a control method for a terminal heat load simulation integrated device of an auxiliary cooling system in an aircraft refrigeration system, and the auxiliary cooling unit performance verification and its control logic are as follows: Figure 5 As shown. Figure 5As shown, the control method of the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system includes: step 1, first, closing the solenoid valve 1, opening the solenoid valve 2, starting the water pump, and then executing step 2.

[0087] The control unit 104 is further configured to start the refrigeration device according to the working conditions of the environment to be simulated, and control the electric heating tube to start with the initial electric power preset under the working conditions of the environment to be simulated. The specific functions and processing of the control unit 104 are also shown in step S120. Among them, the working conditions of the environment to be simulated, such as cruising conditions. Specifically, Figure 5 As shown, the control method for the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system further includes: Step 2: After the refrigerant of the auxiliary cooling system in the aircraft refrigeration system begins to flow throughout the terminal heat load simulation integrated device, the auxiliary cooling unit is started under cruise conditions, and the electric heating pipe is turned on with an initial electric power e, after which Step 3 is executed. The initial electric power e is 110% of the auxiliary cooling unit's design cooling capacity under cruise conditions.

[0088] The acquisition unit 102 is configured to acquire the temperature at the inlet of the refrigeration device, recorded as the current inlet temperature of the refrigeration device, such as the auxiliary cooling unit inlet temperature sensor Tc,in reading the auxiliary cooling unit inlet real-time temperature t1; acquire the temperature at the outlet of the refrigeration device, recorded as the current outlet temperature of the refrigeration device, such as the auxiliary cooling unit outlet temperature sensor Tc,out reading the auxiliary cooling unit outlet real-time temperature t2; acquire the temperature at the inlet of the electric heating pipe, recorded as the current inlet temperature of the electric heating pipe, such as the electric heating pipe inlet temperature sensor Th,in reading the electric heating pipe inlet real-time temperature t3; acquire the temperature at the outlet of the electric heating pipe, recorded as the current outlet temperature of the electric heating pipe, such as the electric heating pipe outlet temperature sensor Th,out reading the electric heating pipe outlet real-time temperature t4; and acquire the mass flow rate of the cooling medium circulating in the refrigeration device, recorded as the current medium flow rate of the refrigeration device, such as the real-time mass flow rate qm of the cooling medium circulating. The specific functions and processing of the acquisition unit 102 are also described in step S130.

[0089] In some embodiments, a first temperature detection unit, such as an auxiliary cooling unit inlet temperature sensor Tc,in, is arranged at the inlet of the refrigeration equipment; a second temperature detection unit, such as an auxiliary cooling unit outlet temperature sensor Tc,out, is arranged at the outlet of the refrigeration equipment; a third temperature detection unit, such as an electric heating tube inlet temperature sensor Th,in, is arranged at the inlet of the electric heating tube; a fourth temperature detection unit, such as an electric heating tube outlet temperature sensor Th,out, is arranged at the outlet of the electric heating tube; a mass flow detection unit is provided at the front end of the second switch unit, that is, the outlet of the refrigeration equipment is connected to the inlet of the electric heating tube after passing through the mass flow detection unit and the second switch unit.

[0090] like Figure 4 As shown, the terminal heat load simulation integrated device for the auxiliary cooling system in an aircraft refrigeration system includes: an auxiliary cooling unit, terminal cooling units 1, 2, and 3, an electric heating pipe, a water pump, solenoid valves 1 and 2, mass flowmeters 1, 2, 3, and 4, an absolute pressure transmitter P, an electric heating pipe inlet temperature sensor Th,in, an electric heating pipe outlet temperature sensor Th,out, an auxiliary cooling unit inlet temperature sensor Tc,in, an auxiliary cooling unit outlet temperature sensor Tc,out, a PID controller, a power regulator, and a PLC (Programmable Logic Controller). The auxiliary cooling unit is used to implement a refrigeration function, cooling terminal cooling units 1, 2, and 3. The water pump is used to provide power for fluid flow in the terminal heat load simulation integrated device for the auxiliary cooling system in the entire aircraft refrigeration system. The data collected by mass flow meters 1, 2, and 3 can be used to calculate the cooling capacity of the auxiliary cooling unit or the heat load of the terminal cooling units 1, 2, and 3 when the solenoid valve 1 is open and the solenoid valve 2 is closed.

[0091] exist Figure 4In the example shown, the outlet of the auxiliary cooling unit for realizing the refrigeration function is respectively connected to the inlet of the terminal cooling unit 1, the inlet of the terminal cooling unit 2, the inlet of the terminal cooling unit 3, and the inlet of the electric heating pipe, wherein the auxiliary cooling unit outlet temperature sensor Tc,out and the solenoid valve 1 are respectively arranged on the pipeline trunk line connecting the outlet of the auxiliary cooling unit with the inlet of the terminal cooling unit 1, the inlet of the terminal cooling unit 2, and the inlet of the terminal cooling unit 3, and the mass flowmeter 1, the mass flowmeter 2, and the mass flowmeter 3 are respectively arranged on the pipeline branches connecting the outlet of the auxiliary cooling unit with the inlet of the terminal cooling unit 1, the inlet of the terminal cooling unit 2, and the inlet of the terminal cooling unit 3, and the mass flowmeter 4, the solenoid valve 2, the absolute pressure transmitter P and the electric heating pipe inlet temperature sensor Th,in are arranged in sequence on the pipeline connecting the outlet of the auxiliary cooling unit with the inlet of the electric heating pipe. The outlets of terminal cooling units 1, 2, and 3 are first connected to the outlet of the electric heating pipe and then to the water pump inlet. The outlet pipe of the electric heating pipe is equipped with an outlet temperature sensor, Th,out. Finally, the outlet of the water pump, which powers the fluid flow in the terminal thermal load simulation integrated device for the auxiliary cooling system within the entire aircraft refrigeration system, is connected to the inlet of the auxiliary cooling unit. The inlet pipe of the auxiliary cooling unit is equipped with an inlet temperature sensor, Tc,in.

[0092] The acquisition unit 102 acquires the temperature at the inlet of the refrigeration device, which is recorded as the current inlet temperature of the refrigeration device, and includes: the control unit 104 is further configured to acquire the temperature detected by the first temperature detection unit, which is recorded as the current inlet temperature of the refrigeration device. The acquisition unit 102 acquires the temperature at the outlet of the refrigeration device, which is recorded as the current outlet temperature of the refrigeration device, and includes: the control unit 104 is further configured to acquire the temperature detected by the second temperature detection unit, which is recorded as the current outlet temperature of the refrigeration device. The acquisition unit 102 acquires the temperature at the inlet of the electric heating pipe, which is recorded as the current inlet temperature of the electric heating pipe, and includes: the control unit 104 is further configured to acquire the temperature detected by the third temperature detection unit, which is recorded as the current inlet temperature of the electric heating pipe. The acquisition unit 102 acquires the temperature at the outlet of the electric heating pipe, which is recorded as the current outlet temperature of the electric heating pipe, and includes: the control unit 104 is further configured to acquire the temperature detected by the fourth temperature detection unit, which is recorded as the current outlet temperature of the electric heating pipe. The acquisition unit 102 acquires the mass flow rate of the coolant circulating in the refrigeration equipment, which is recorded as the current medium flow rate of the refrigeration equipment, including: the control unit 104 is specifically configured to acquire the mass flow rate detected by the mass flow detection unit, which is recorded as the current medium flow rate of the refrigeration equipment, such as the real-time mass flow rate qm of the coolant circulation.

[0093] Specifically, if Figure 5 As shown, the control method of the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system also includes: Step 3, after the auxiliary cooling unit is turned on in the cruise condition and the electric heating tube is turned on with the initial electric power e, the circulating refrigerant releases heat (heat release power is Po) when flowing through the auxiliary cooling unit and absorbs heat (heat absorption power is Pi) when flowing through the electric heating tube. The auxiliary cooling unit inlet temperature sensor Tc,in reads the auxiliary cooling unit inlet real-time temperature t1, the auxiliary cooling unit outlet temperature sensor Tc,out reads the auxiliary cooling unit outlet real-time temperature t2, the mass flow meter 4 reads the real-time mass flow rate qm of the refrigerant circulating in the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system, the electric heating pipe inlet temperature sensor Th,in reads the electric heating pipe inlet real-time temperature t3, and the electric heating pipe outlet temperature sensor Th,out reads the electric heating pipe outlet real-time temperature t4. The five data of the auxiliary cooling unit inlet real-time temperature t1, the auxiliary cooling unit outlet real-time temperature t2, the real-time mass flow rate qm of the refrigerant circulation, the electric heating pipe inlet real-time temperature t3 and the electric heating pipe outlet real-time temperature t4 are transmitted to the PLC in the form of electrical signals, and then step 4 is executed.

[0094] The control unit 104 is further configured to determine the heat release power of the cooling medium of the cooling equipment when it flows through the cooling equipment, and the heat absorption power of the cooling medium of the cooling equipment when it flows through the electric heating tube, based on the current inlet temperature of the cooling equipment, the current outlet temperature of the cooling equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the cooling equipment, such as determining that the cooling medium releases heat (heat release power is Po) when it flows through the auxiliary cooling unit and absorbs heat (heat absorption power is Pi) when it flows through the electric heating tube. The specific functions and processing of the control unit 104 are also shown in step S140.

[0095] In some embodiments, the control unit 104 determines the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube according to the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, including: the control unit 104 is specifically further configured to input the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment into a preset PLC, and calculate the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube using the calculation model pre-set in the PLC.

[0096] Among them, the calculation model pre-set in the PLC includes: the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the corresponding relationship between the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment; and the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube.

[0097] In the solution of the present invention, by receiving the signals of the temperature sensors and mass flow meters arranged at the inlet and outlet of the electric heating tube and the inlet and outlet of the refrigeration equipment in the terminal heat load simulation device of the refrigeration equipment, a PLC (programmable logic controller) is used to calculate the real-time heat absorption power of the fluid in the electric heating tube and the real-time heat release power in the refrigeration equipment, and then a PID controller is used to adjust the electric power of the electric heating tube with the real-time heat release power of the fluid in the refrigeration equipment as the set value to make the heat absorption power of the fluid in the electric heating tube close to and eventually equal to it. At this time, the heat absorption power of the electric heating tube is the cooling capacity of the refrigeration equipment under this working condition. Compared with the traditional performance verification method, the solution of the present invention can more accurately reflect the heat absorption power of the coolant or refrigerant of the refrigeration equipment, and the degree of automation is also higher.

[0098] In some embodiments, the corresponding relationship between the current inlet temperature of the refrigeration device, the current outlet temperature of the refrigeration device, and the current medium flow rate of the refrigeration device, and the heat release power of the cooling medium of the refrigeration device when flowing through the refrigeration device includes: Po = qmCp (t1-t2). The corresponding relationship between the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration device, and the heat absorption power of the cooling medium of the refrigeration device when flowing through the electric heating tube includes: Pi = qmCp (t4-t3).

[0099] Among them, Po represents the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, qm represents the current medium flow rate of the refrigeration equipment, Cp represents the constant-pressure specific heat capacity of the cooling medium of the refrigeration equipment, t1 represents the current inlet temperature of the refrigeration equipment, and t2 represents the current outlet temperature of the refrigeration equipment; Pi represents the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube, t3 represents the current inlet temperature of the electric heating tube, and t4 represents the current outlet temperature of the electric heating tube.

[0100] Specifically, if Figure 5 As shown, the control method for the terminal heat load simulation integrated device of the auxiliary cooling system in an aircraft refrigeration system further includes: Step 4, in the PCL, the heat release power Po = qmCp(t1-t2) of the brine when flowing through the auxiliary cooling unit and the heat absorption power Pi = qmCp(t4-t3) of the brine when flowing through the electric heating tube can be calculated, and then Step 5 is executed. Wherein, Cp represents the constant pressure specific heat capacity of the medium, which varies for different media; Cp is mainly affected by the type and state of the medium and is less affected by temperature.

[0101] The control unit 104 is further configured to, while maintaining the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, perform PID control on the initial electric power of the electric heating tube based on the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so as to achieve a balance between the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment. The specific functions and processing of the control unit 104 are further described in step S150.

[0102] The solution of the present invention provides a control method for a terminal heat load simulation integrated device of a refrigeration equipment. The method simulates the heat load by receiving signals from the temperature sensors and mass flow meters arranged at the inlet and outlet of the electric heating tube in the terminal heat load simulation device of the refrigeration equipment and at the inlet and outlet of the refrigeration equipment (such as temperature sensors, mass flow meters, etc.). The method automatically controls the heating power of the electric heater according to the fluid flow and temperature using a PLC (programmable logic controller), a PID controller and a power regulator, automatically adjusts and displays the heating power of the electric heater, adjusts and displays the heat absorption power of the medium in real time, and quickly reaches system balance. The displayed value at balance is the refrigeration capacity of the refrigeration equipment, so as to measure the refrigeration capacity of the refrigeration equipment and more accurately reflect the heat absorption power of the coolant or refrigerant of the refrigeration equipment.

[0103] In some embodiments, a power regulator is provided in conjunction with the electric heating tube; the power regulator is used to adjust the current electric power of the electric heating tube.

[0104] The control unit 104 performs PID adjustment on the initial electric power of the electric heating tube according to the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube, when the heat release power of the cooling medium of the refrigeration equipment remains unchanged when the cooling medium flows through the refrigeration equipment, so that the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, including: the control unit 104 is further configured to perform PID control on the power regulator of the electric heating tube according to the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube, when the heat release power of the cooling medium of the refrigeration equipment remains unchanged when the cooling medium flows through the refrigeration equipment, so as to adjust the current electric power of the electric heating tube through the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment.

[0105] In the solution of the present invention, the control target is the fluid heat absorption power (i.e., the heat absorption power Pi of the refrigerant when flowing through the electric heating tube), the control method is PLC, PID controller, and the implementation method is to adjust the electric power of the electric heating tube; by adjusting the electric power of the electric heating tube (such as the initial electric power e of the electric heating tube), the control target is achieved, and the heating power is automatically adjusted according to the fluid flow rate and temperature, which can solve the problems of complicated control methods for the fluid heat absorption of the thermal load simulation device, low control accuracy, and long verification time.

[0106] In some embodiments, the control unit 104 performs PID control on the power regulator of the electric heating tube according to the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube, while the heat release power of the cooling medium of the refrigeration equipment remains unchanged when the cooling medium flows through the refrigeration equipment. The power regulator adjusts the current electric power of the electric heating tube based on the initial electric power of the electric heating tube, so that the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube is balanced with the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, including:

[0107] The control unit 104 is further configured to determine, while maintaining a constant heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment, a relationship between the heat absorption power of the cooling medium of the refrigeration equipment flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment flowing through the refrigeration equipment. The specific functions and processing of the control unit 104 are further described in step S210.

[0108] The control unit 104 is further configured to control the power regulator via a PID controller to maintain the current power of the electric heating tube at the initial power of the electric heating tube if the heat absorption power of the cooling medium of the refrigeration equipment flowing through the electric heating tube equals the heat release power of the cooling medium of the refrigeration equipment flowing through the refrigeration equipment. This balances the heat absorption power of the cooling medium of the refrigeration equipment flowing through the electric heating tube with the heat release power of the cooling medium of the refrigeration equipment flowing through the refrigeration equipment. The specific functions and processing of the control unit 104 are further described in step S220.

[0109] The control unit 104 is further configured to control the power regulator via a PID controller to reduce the current electric power of the electric heating tube based on the initial electric power of the electric heating tube, if the heat absorption power of the cooling medium of the refrigeration equipment flowing through the electric heating tube is greater than the heat release power of the cooling medium of the refrigeration equipment flowing through the refrigeration equipment. This is done until the heat absorption power of the cooling medium of the refrigeration equipment flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment flowing through the refrigeration equipment reach a balance, thereby maintaining the current electric power of the electric heating tube at a current value. The specific functions and processing of the control unit 104 are further described in step S230.

[0110] The control unit 104 is further configured to control the power regulator via a PID controller to increase the current electric power of the electric heating tube based on the initial electric power of the electric heating tube, if the heat absorption power of the cooling medium of the refrigeration equipment flowing through the electric heating tube is less than the heat release power of the cooling medium of the refrigeration equipment flowing through the refrigeration equipment. This is done until the heat absorption power of the cooling medium of the refrigeration equipment flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment flowing through the refrigeration equipment reach equilibrium, thereby maintaining the current electric power of the electric heating tube at a current value. The specific functions and processing of the control unit 104 are further described in step S240.

[0111] Specifically, if Figure 5 As shown, the control method for the terminal heat load simulation integrated device of the auxiliary cooling system in an aircraft refrigeration system also includes: Step 5, the PLC then transmits the two calculated values ​​(i.e., the heat release power Po of the brine when flowing through the auxiliary cooling unit, and the heat absorption power Pi of the brine when flowing through the electric heating tube) to the PID controller in the form of signals. Since the auxiliary cooling unit is started in a cyclical mode, the cooling capacity of the auxiliary cooling unit is fixed. Therefore, the heat release power Po of the brine when flowing through the auxiliary cooling unit is used as the set value to control the power regulator of the electric heating tube to adjust the initial electric power e of the electric heating tube in a constant electric power manner. The control logic is as follows:

[0112] When the heat absorption power Pi of the refrigerant when flowing through the electric heating tube equals the heat release power Po of the refrigerant when flowing through the auxiliary cooling unit, the PID controller controls the power regulator to adjust the initial electric power e of the electric heating tube to keep it stable.

[0113] When the heat absorption power Pi of the refrigerant when flowing through the electric heating tube is greater than the heat release power Po of the refrigerant when flowing through the auxiliary cooling unit, the PID controller controls the power regulator to reduce the initial electric power e of the electric heating tube until Pi = the heat release power Po of the refrigerant when flowing through the auxiliary cooling unit.

[0114] When the heat absorption power Pi of the refrigerant when flowing through the electric heating tube is less than the heat release power Po of the refrigerant when flowing through the auxiliary cooling unit, the PID controller controls the power regulator to increase the initial electric power e of the electric heating tube until the heat absorption power Pi of the refrigerant when flowing through the electric heating tube is equal to the heat release power Po of the refrigerant when flowing through the auxiliary cooling unit.

[0115] In some embodiments, the simulation control method for a refrigeration device according to the solution of the present invention further includes: the control unit 104 is further configured to display at least one of the heat absorption power of the refrigeration device when the cooling medium flows through the electric heating tube and the heat release power of the refrigeration device when the cooling medium flows through the refrigeration device. Wherein, when the heat absorption power of the refrigeration device when the cooling medium flows through the electric heating tube and the heat release power of the refrigeration device when the cooling medium flows through the refrigeration device have reached equilibrium, the heat absorption power of the refrigeration device when the cooling medium flows through the electric heating tube represents the refrigeration capacity of the refrigeration device under the operating conditions of the environment to be simulated.

[0116] Specifically, if Figure 5 As shown, the control method of the terminal heat load simulation integrated device of the auxiliary cooling system in the aircraft refrigeration system further includes: after step 5, when the heat absorption power Pi of the brine when flowing through the electric heating tube equals the heat release power Po of the brine when flowing through the auxiliary cooling unit, the heat absorption power Pi of the brine when flowing through the electric heating tube (or the heat release power Po of the brine when flowing through the auxiliary cooling unit) calculated by the PLC (programmable logic controller) is the cooling capacity of the auxiliary cooling unit under the cruise condition.

[0117] Under other operating conditions, the initial power e of the electric heating tube can be changed, and this adjustment only affects the settling time. The activation order of the auxiliary cooling unit and the electric heating tube can be interchanged. Furthermore, in the solution of the present invention, the tracking variables of the PID controller of the electric heating tube are two calculated quantities, namely temperature and flow rate.

[0118] The solution of the present invention can be applied to performance verification tests during the development process of refrigeration equipment with a large number of terminal loads, such as aircraft auxiliary cooling systems. As long as the refrigerant or coolant of the refrigeration equipment can be heated by the electric heating tube and a heat exchange circuit can be formed between the electric heating tube and the terminal heat load simulation device, the cooling capacity of the refrigeration equipment can be verified using the terminal heat load simulation device. However, different refrigeration equipment has different cooling capacities, so the size and maximum heating power of the electric heating tube in the terminal heat load simulation device of different refrigeration equipment will vary. In the solution of the present invention, the test for verifying the product performance of the refrigeration equipment is carried out by recording data at the inlet and outlet of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment, and sensors (such as temperature sensors, mass flow meters, etc.) arranged at the inlet and outlet of the refrigeration equipment, and calculating the heating power of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment by editing the formula P=qmCpΔt on the computer through Excel. When the operating condition of the refrigeration equipment changes, the heating power of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment can be automatically adjusted to balance the heating power of the electric heating pipe in the terminal heat load simulation device of the refrigeration equipment with the cooling capacity of the refrigeration equipment. The operation is simpler and the time of performance verification test in the development process of refrigeration equipment with a large number of terminal loads, such as aircraft auxiliary cooling systems, is greatly shortened.

[0119] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0120] According to the technical solution of the present invention, a terminal heat load simulation integrated device consisting of a refrigeration device (such as an auxiliary refrigeration unit), multiple terminal cooling units (such as terminal cooling unit 1 to terminal cooling unit 3), and an electric heating pipe is formed. After the outlet of the refrigeration device passes through the connecting pipe of the main line, it is connected to the branch pipe of the inlet of the multiple terminal cooling units on the one hand, and is connected to the inlet of the electric heating pipe on the other hand; the outlet of the electric heating pipe is connected to the outlet of the multiple terminal cooling units; the outlet of the multiple terminal cooling units is also connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration device; temperature sensors are set at the inlet and outlet of the refrigeration device, a first solenoid valve (such as solenoid valve 1) is set between the connecting pipe between the outlet of the refrigeration device and the inlet of the multiple terminal cooling units, a mass flow meter (such as mass flow meter 4) and a second solenoid valve (such as solenoid valve 2) are set on the pipeline between the outlet of the refrigeration device and the inlet of the electric heater; temperature sensors are set at the inlet and outlet of the electric heating pipe, sensor; during control, after the first solenoid valve is closed and the second solenoid valve is opened, the water pump is turned on, the refrigeration equipment is turned on in cruise mode, and the electric heating pipe is turned on with the initial electric power; based on the inlet and outlet temperatures of the refrigeration equipment, the inlet and outlet temperatures of the electric heating pipe, and the mass flow rate of the refrigerant on the inlet pipe of the electric heating pipe, the heat release power of the refrigerant when flowing through the refrigeration equipment and the heat absorption power of the refrigerant when flowing through the electric heating pipe are calculated, and the PID controller controls the power regulator of the electric heating pipe to adjust the initial electric power of the electric heating pipe in a constant electric power manner according to the heat release power of the refrigerant when flowing through the refrigeration equipment and the heat absorption power of the refrigerant when flowing through the electric heating pipe, so that the heat absorption power of the fluid in the electric heating pipe approaches and eventually equals the real-time heat release power of the refrigeration equipment, so that the cooling capacity of the refrigeration equipment and the heating power of the electric heating pipe are balanced, the operation is simpler, and the time of performance verification test in the development process of refrigeration equipment with a large number of terminal loads, such as aircraft auxiliary cooling systems, is greatly shortened.

[0121] According to an embodiment of the present invention, a refrigeration device corresponding to the simulation control device of the refrigeration device is also provided. The refrigeration device may include: the simulation control device of the refrigeration device described above.

[0122] Since the processing and functions implemented by the refrigeration equipment of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0123] According to the technical solution of the present invention, a terminal heat load simulation integrated device consisting of a refrigeration device (such as an auxiliary refrigeration unit), multiple terminal cooling units (such as terminal cooling unit 1 to terminal cooling unit 3), and an electric heating pipe is formed. After the outlet of the refrigeration device passes through the connecting pipe of the main line, it is connected to the branch pipe of the inlet of the multiple terminal cooling units on the one hand, and is connected to the inlet of the electric heating pipe on the other hand; the outlet of the electric heating pipe is connected to the outlet of the multiple terminal cooling units; the outlet of the multiple terminal cooling units is also connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration device; temperature sensors are set at the inlet and outlet of the refrigeration device, a first solenoid valve (such as solenoid valve 1) is set between the connecting pipe between the outlet of the refrigeration device and the inlet of the multiple terminal cooling units, a mass flow meter (such as mass flow meter 4) and a second solenoid valve (such as solenoid valve 2) are set on the pipeline between the outlet of the refrigeration device and the inlet of the electric heater; Temperature sensors are set at the inlet and outlet; during control, after the first solenoid valve is closed and the second solenoid valve is opened, the water pump is turned on, the refrigeration equipment is turned on in cruise mode, and the electric heating pipe is turned on with the initial electric power; according to the inlet and outlet temperatures of the refrigeration equipment, the inlet and outlet temperatures of the electric heating pipe, and the mass flow rate of the refrigerant on the inlet pipeline of the electric heating pipe, the heat release power of the refrigerant when flowing through the refrigeration equipment and the heat absorption power of the refrigerant when flowing through the electric heating pipe are calculated, and the PID controller is used to control the power regulator of the electric heating pipe to adjust the initial electric power of the electric heating pipe in a constant electric power manner according to the heat release power of the refrigerant when flowing through the refrigeration equipment and the heat absorption power of the refrigerant when flowing through the electric heating pipe, so that the heat absorption power of the fluid in the electric heating pipe is close to and eventually equal to the real-time heat release power of the refrigeration equipment, so that the cooling capacity of the refrigeration equipment and the heating power of the electric heating pipe are balanced, which can more accurately reflect the heat absorption power of the refrigerant or refrigerant of the refrigeration equipment, and the degree of automation is also higher.

[0124] According to an embodiment of the present invention, a storage medium corresponding to the simulation control method of refrigeration equipment is also provided, wherein the storage medium includes a stored program, wherein when the program is run, the device where the storage medium is located is controlled to execute the simulation control method of refrigeration equipment described above.

[0125] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0126] According to the technical solution of the present invention, a terminal heat load simulation integrated device consisting of a refrigeration device (such as an auxiliary refrigeration unit), multiple terminal cooling units (such as terminal cooling unit 1 to terminal cooling unit 3), and an electric heating pipe is formed. After the outlet of the refrigeration device passes through the connecting pipe of the main line, it is connected to the branch pipe of the inlet of the multiple terminal cooling units on the one hand, and is connected to the inlet of the electric heating pipe on the other hand; the outlet of the electric heating pipe is connected to the outlet of the multiple terminal cooling units; the outlet of the multiple terminal cooling units is also connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration device; temperature sensors are set at the inlet and outlet of the refrigeration device, a first solenoid valve (such as solenoid valve 1) is set between the connecting pipe between the outlet of the refrigeration device and the inlet of the multiple terminal cooling units, a mass flow meter (such as mass flow meter 4) and a second solenoid valve (such as solenoid valve 2) are set on the pipe between the outlet of the refrigeration device and the inlet of the electric heater; temperature sensors are set at the inlet and outlet of the electric heating pipe ; During control, after the first solenoid valve is closed and the second solenoid valve is opened, the water pump is turned on, the refrigeration equipment is turned on in cruise mode, and the electric heating pipe is turned on with the initial electric power; according to the inlet and outlet temperatures of the refrigeration equipment, the inlet and outlet temperatures of the electric heating pipe, and the mass flow rate of the refrigerant on the inlet pipe of the electric heating pipe, the heat release power of the refrigerant when flowing through the refrigeration equipment and the heat absorption power of the refrigerant when flowing through the electric heating pipe are calculated, and the PID controller is used to control the power regulator of the electric heating pipe to adjust the initial electric power of the electric heating pipe in a constant electric power manner according to the heat release power of the refrigerant when flowing through the refrigeration equipment and the heat absorption power of the refrigerant when flowing through the electric heating pipe, so that the heat absorption power of the fluid in the electric heating pipe is close to and eventually equal to the real-time heat release power of the refrigeration equipment, so that the cooling capacity of the refrigeration equipment and the heating power of the electric heating pipe are balanced, and the displayed value at the time of balance is the refrigeration capacity of the refrigeration equipment, so as to measure the refrigeration capacity of the refrigeration equipment, which can more accurately reflect the heat absorption power of the refrigerant or refrigerant of the refrigeration equipment.

[0127] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0128] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A simulation control method for refrigeration equipment, characterized in that: The number of terminal cooling units of the refrigeration equipment is n, where n is a positive integer; a terminal heat load simulation device and a water pump are provided in conjunction with the refrigeration equipment; the terminal heat load simulation device is used to simulate the sum of the heat loads of the n terminal cooling units of the refrigeration equipment; The water pump is used to provide power for the cooling medium in the entire terminal heat load simulation device circuit, so that it circulates in the terminal heat load simulation device; when n ≥ 2, the n terminal cooling units are arranged in parallel; the outlet of the refrigeration device is connected to the inlet of the n terminal cooling units after passing through a first switch unit; the outlet of the n terminal cooling units is connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration device; the outlet of the refrigeration device is further connected to the inlet of the electric heating pipe after passing through a second switch unit; the outlet of the electric heating pipe and the outlets of the n terminal cooling units are combined to merge into the inlet of the water pump; the simulation control method of the refrigeration device includes: After controlling the first switch unit to be closed and the second switch unit to be opened, controlling the water pump to be opened so as to allow the cooling medium of the refrigeration equipment to flow in the terminal heat load simulation device; Turning on the refrigeration device under the working conditions of the environment to be simulated, and controlling the electric heating tube to turn on with the initial electric power preset under the working conditions of the environment to be simulated; Obtain the temperature at the inlet of the refrigeration equipment, which is recorded as the current inlet temperature of the refrigeration equipment; obtain the temperature at the outlet of the refrigeration equipment, which is recorded as the current outlet temperature of the refrigeration equipment; obtain the temperature at the inlet of the electric heating pipe, which is recorded as the current inlet temperature of the electric heating pipe; obtain the temperature at the outlet of the electric heating pipe, which is recorded as the current outlet temperature of the electric heating pipe; and obtain the mass flow rate of the cooling medium circulating in the refrigeration equipment, which is recorded as the current medium flow rate of the refrigeration equipment; Determining, based on a current inlet temperature of the refrigeration equipment, a current outlet temperature of the refrigeration equipment, a current inlet temperature of the electric heating tube, a current outlet temperature of the electric heating tube, and a current medium flow rate of the refrigeration equipment, a heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, and a heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube; Under the condition that the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the initial electric power of the electric heating tube is PID-adjusted according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is balanced with the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment.

2. The simulation control method for refrigeration equipment according to claim 1, characterized in that: A first temperature detection unit is arranged at the inlet of the refrigeration device; a second temperature detection unit is arranged at the outlet of the refrigeration device; a third temperature detection unit is arranged at the inlet of the electric heating tube; a fourth temperature detection unit is arranged at the outlet of the electric heating tube; a mass flow detection unit is provided at the front end of the second switch unit; in, Acquiring the temperature at the inlet of the refrigeration device and recording it as the current inlet temperature of the refrigeration device, including: acquiring the temperature detected by the first temperature detection unit and recording it as the current inlet temperature of the refrigeration device; Acquiring the temperature at the outlet of the refrigeration device and recording it as the current outlet temperature of the refrigeration device, including: acquiring the temperature detected by the second temperature detection unit and recording it as the current outlet temperature of the refrigeration device; Acquiring the temperature at the inlet of the electric heating tube and recording it as the current inlet temperature of the electric heating tube, including: acquiring the temperature detected by the third temperature detection unit and recording it as the current inlet temperature of the electric heating tube; Obtaining the temperature at the outlet of the electric heating tube and recording it as the current outlet temperature of the electric heating tube, including: obtaining the temperature detected by the fourth temperature detection unit and recording it as the current outlet temperature of the electric heating tube; Acquiring the mass flow rate of the cooling medium of the refrigeration equipment and recording it as the current medium flow rate of the refrigeration equipment includes: acquiring the mass flow rate detected by the mass flow detection unit and recording it as the current medium flow rate of the refrigeration equipment.

3. The simulation control method for refrigeration equipment according to claim 1, characterized in that: Determining, based on a current inlet temperature of the refrigeration equipment, a current outlet temperature of the refrigeration equipment, a current inlet temperature of the electric heating tube, a current outlet temperature of the electric heating tube, and a current medium flow rate of the refrigeration equipment, a heat release power of a cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, and a heat absorption power of a cooling medium of the refrigeration equipment when flowing through the electric heating tube, includes: Inputting the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating pipe, the current outlet temperature of the electric heating pipe, and the current medium flow rate of the refrigeration equipment into a preset PLC, and using a calculation model preset in the PLC, calculating the heat release power of the refrigeration equipment when the cooling medium flows through the refrigeration equipment, and the heat absorption power of the cooling medium when the refrigeration equipment flows through the electric heating pipe; Among them, the calculation model pre-set in the PLC includes: the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the corresponding relationship between the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment; and the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube.

4. The simulation control method for refrigeration equipment according to claim 3, characterized in that: in, The corresponding relationship between the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, and the current medium flow rate of the refrigeration equipment, and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment includes: Po = qmCp (t1-t2); The corresponding relationship between the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, the current medium flow rate of the refrigeration device, and the heat absorption power of the cooling medium of the refrigeration device when flowing through the electric heating tube includes: Pi = qmCp (t4-t3); Among them, Po represents the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, qm represents the current medium flow rate of the refrigeration equipment, Cp represents the constant-pressure specific heat capacity of the cooling medium of the refrigeration equipment, t1 represents the current inlet temperature of the refrigeration equipment, and t2 represents the current outlet temperature of the refrigeration equipment; Pi represents the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube, t3 represents the current inlet temperature of the electric heating tube, and t4 represents the current outlet temperature of the electric heating tube.

5. The simulation control method for refrigeration equipment according to claim 1, characterized in that: A power regulator is provided in conjunction with the electric heating tube; the power regulator is used to adjust the current electric power of the electric heating tube; Under the condition that the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, PID adjustment is performed on the initial electric power of the electric heating tube according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment are balanced, including: Under the condition that the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, the power regulator of the electric heating tube is PID controlled according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so that the current electric power of the electric heating tube is adjusted by the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment are balanced.

6. The simulation control method for refrigeration equipment according to claim 5, characterized in that: Under the condition that the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, PID control is performed on the power regulator of the electric heating tube according to the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube, so as to adjust the current electric power of the electric heating tube by the power regulator based on the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration tube are balanced, including: Under the condition that the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment remains unchanged, determining the relationship between the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment; If the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is equal to the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, the power regulator is controlled by the PID controller to keep the current electric power of the electric heating tube at the initial electric power of the electric heating tube, so that the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment are balanced; If the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is greater than the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, the power regulator is controlled by the PID controller to reduce the current electric power of the electric heating tube on the basis of the initial electric power of the electric heating tube until the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment reach a balance, so that the current electric power of the electric heating tube is maintained at the current value; If the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is less than the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, the power regulator is controlled by the PID controller to increase the current electric power of the electric heating tube based on the initial electric power of the electric heating tube until the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube is balanced with the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment, so that the current electric power of the electric heating tube is maintained at the current value.

7. The simulation control method for refrigeration equipment according to any one of claims 1 to 6, characterized in that: Also includes: Displaying at least one of the heat absorption power when the cooling medium of the refrigeration equipment flows through the electric heating tube and the heat release power when the cooling medium of the refrigeration equipment flows through the refrigeration equipment; Among them, when the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when flowing through the refrigeration equipment have reached a balance, the heat absorption power of the cooling medium of the refrigeration equipment when flowing through the electric heating tube represents the refrigeration capacity of the refrigeration equipment under the working conditions of the environment to be simulated.

8. A simulation control device for refrigeration equipment, characterized in that: The number of terminal cooling units of the refrigeration equipment is n, where n is a positive integer; a terminal heat load simulation device and a water pump are provided in conjunction with the refrigeration equipment; the terminal heat load simulation device is used to simulate the sum of the heat loads of the n terminal cooling units of the refrigeration equipment; The water pump is used to provide power for the cooling medium in the entire terminal heat load simulation device circuit, so that it circulates in the terminal heat load simulation device; when n ≥ 2, the n terminal cooling units are arranged in parallel; the outlet of the refrigeration equipment is connected to the inlet of the n terminal cooling units after passing through the first switch unit; the outlet of the n terminal cooling units is connected to the inlet of the water pump; the outlet of the water pump is connected to the inlet of the refrigeration equipment; the outlet of the refrigeration equipment is further connected to the inlet of the electric heating pipe after passing through the second switch unit; the outlet of the electric heating pipe and the outlets of the n terminal cooling units are combined to merge into the inlet of the water pump; the simulation control device of the refrigeration equipment includes: a control unit configured to control the first switch unit to be closed and the second switch unit to be opened, and then control the water pump to be opened, so that the cooling medium of the refrigeration equipment flows in the terminal heat load simulation device; The control unit is further configured to start the refrigeration device under the working conditions of the environment to be simulated, and control the electric heating tube to start with the initial electric power preset under the working conditions of the environment to be simulated; an acquisition unit configured to acquire the temperature at the inlet of the refrigeration device, which is recorded as the current inlet temperature of the refrigeration device; acquire the temperature at the outlet of the refrigeration device, which is recorded as the current outlet temperature of the refrigeration device; acquire the temperature at the inlet of the electric heating pipe, which is recorded as the current inlet temperature of the electric heating pipe; acquire the temperature at the outlet of the electric heating pipe, which is recorded as the current outlet temperature of the electric heating pipe; and acquire the mass flow rate of the cooling medium circulating in the refrigeration device, which is recorded as the current medium flow rate of the refrigeration device; The control unit is further configured to determine the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment, and the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube according to the current inlet temperature of the refrigeration equipment, the current outlet temperature of the refrigeration equipment, the current inlet temperature of the electric heating tube, the current outlet temperature of the electric heating tube, and the current medium flow rate of the refrigeration equipment; The control unit is further configured to perform PID adjustment on the initial electric power of the electric heating tube according to the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube, while the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment remains unchanged, so as to achieve a balance between the heat absorption power of the cooling medium of the refrigeration equipment when it flows through the electric heating tube and the heat release power of the cooling medium of the refrigeration equipment when it flows through the refrigeration equipment.

9. A refrigeration device, characterized in that: include: The simulation control device for refrigeration equipment according to claim 8.

10. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the simulation control method for refrigeration equipment according to any one of claims 1 to 6.

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