A centralized energy-saving control system, computer equipment, and computer-readable storage medium

Abstract

This invention discloses a centralized energy-saving control system, comprising: executing a heating mode of a first system to raise the temperature to a set temperature threshold; when the temperature stabilizes at the set temperature threshold or reaches a preset start-up time, starting a second system; if the setting conditions are met, a "heat pump prohibition start flag" needs to be set, and the heat pump is in standby mode; otherwise, the heat pump is started, and the outlet air temperature of the heat pump is adjusted until the heat pump meets the shutdown conditions. This centralized energy-saving control system collects the temperature control data of the electric heating system from the first system, then starts the second system to control the outlet air temperature of the heat pump, allowing the electric heating and heat pump to operate independently. This eliminates the need to modify the control logic of the original heating system, and allows for the integration of the heat pump's control logic after adding the heat pump to preheat fresh air, utilizing the energy-saving effect of the heat pump to further improve the energy efficiency of the drying oven. This invention also provides a computer device and a computer-readable storage medium.

Description

Technical Field

[0001] This invention relates to the field of heat pump technology, specifically to a heat pump-based centralized energy-saving control system, computer equipment, and computer-readable storage medium. Background Technology

[0002] A heat pump is a highly efficient and energy-saving device that fully utilizes low-grade heat energy. Heat can spontaneously transfer from a high-temperature object to a low-temperature object, but not spontaneously in the opposite direction. The working principle of a heat pump is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation manner. It consumes only a small amount of net reverse circulation work to obtain a large amount of heat supply, effectively utilizing low-grade heat energy that is difficult to apply, thus achieving energy-saving goals.

[0003] The drying oven is mainly used to dry the materials inside. Its working principle is as follows: fresh air is delivered to the electric heating equipment through the fan, heated, and then sent to the drying oven to dry the materials. The dried air is discharged upward through the air duct, and this process is continuously circulated to make the temperature inside the drying oven uniform, and the water vapor is discharged outward with the exhaust air.

[0004] Currently, drying ovens mainly use electric heating, and their energy-saving methods primarily involve controlling exhaust air volume, utilizing return air waste heat, and recovering exhaust waste heat. Figure 1 The structure shown is as follows. Traditional drying ovens primarily use electric heating, which consumes a large amount of electricity and does not meet current energy-saving and environmental protection requirements. Generally, a heat pump is used to replace the electric heating equipment for primary heating of the drying oven. However, the hot air temperature provided by the heat pump is only 60℃-80℃, which cannot meet the higher temperature requirements of the drying oven. Some technologies use a heat pump + electric heating hot air system, but the heat pump is the primary heating and the electric heating is auxiliary. That is, the heat pump is started first to heat the fresh air, and finally the electric heating is used to heat it to the target temperature. Although this method can achieve good energy-saving effects, the addition of a heat pump changes the control sequence, requiring changes to the control logic of the original drying oven's heating system, which can easily affect the temperature stability of the drying oven. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, one of the objectives of this invention is to provide a centralized energy-saving control system that solves the above-mentioned traditional problems. Its electric heating and heat pump operate independently, which does not require changing the control logic of the original heating system. Furthermore, after adding the heat pump, the control logic of the heat pump can be combined to further improve the energy-saving effect of the drying oven.

[0006] The second objective of this invention is to provide a computer device.

[0007] A third objective of this invention is to provide a computer-readable storage medium.

[0008] One of the objectives of this invention is achieved through the following technical solution:

[0009] A centralized energy-saving control system includes a first system and a second system, and the control system includes the following control steps:

[0010] S1: Turn on the electric heating, execute the heating mode of the first system, heat up the respective drying chambers in the oven, and run the intelligent control module to raise the temperature of the drying chamber to the set temperature threshold T. 设定 ;

[0011] S2: During the heating process of the heating mode of the first system, when the temperature of one of the drying chambers stabilizes at the set temperature threshold or reaches the preset start time, the second system is started;

[0012] S3: After the second system starts, determine whether the "heat pump do not start sign" in the heat pump corresponding to each drying chamber needs to be set. If the setting condition is met, the "heat pump do not start sign" needs to be set and the heat pump is in standby mode. Otherwise, the "heat pump do not start sign" does not need to be set, the heat pump is turned on, and the outlet air temperature of the heat pump is adjusted until the heat pump meets the shutdown condition.

[0013] Preferably, in step S1, the intelligent control module is a PID control module; in step S2, the preset start-up time is 35-45 minutes after the electric heating is turned on.

[0014] Preferably, in step S3, the conditions for setting the "heat pump start-prohibited flag" must simultaneously meet the following conditions:

[0015] (1) The output power of electric heating is less than the set output power W of heat pump. 置位设定 More preferably, W 置位设定 10% of the rated power of electric heating;

[0016] (2) The actual temperature of the drying chamber is currently at T. 设定 Within ±1℃;

[0017] (3) The heat pump is currently in a stopped state.

[0018] Preferably, in step S3, the heat pump meets the shutdown condition as follows: when the heat pump is at its lowest operating frequency, the actual temperature of the current drying chamber is greater than T. 设定 ±5℃, for a duration of t 持续 The internal temperature has exceeded 5°C, and at the same time, the electric heating output power is less than the heat pump's shutdown set output power (W). 停机设定 If the "Heat Pump Do Not Start Flag" is set, the heat pump will stop.

[0019] More preferably, W 停机设定1% of the rated power of the electric heating, duration t 持续 =5s-10s.

[0020] Preferably, in step S3, the method for adjusting the outlet air temperature of the heat pump includes the following steps:

[0021] (1) Preheating stage

[0022] Start the heat pump at the base outlet air temperature and start timing. Preheat the heat pump within 10 minutes.

[0023] (2) Temperature adjustment stage

[0024] Based on the real-time temperature inside the drying chamber, the set temperature threshold, and the output power of the electric heating, determine whether it is necessary to adjust the basic air outlet temperature of the heat pump. If it is necessary to adjust the basic air outlet temperature, start adjusting the basic air outlet temperature of the heat pump after reaching the set adjustment cycle. Otherwise, it is not necessary to adjust the basic air outlet temperature, and the fresh air is preheated at the basic air outlet temperature of the heat pump.

[0025] More preferably, the set period is adjusted to 2 minutes.

[0026] Preferably, the step of determining the basic outlet air temperature of the heat pump is as follows:

[0027] If the condition for increasing the base air outlet temperature is met, and the current air outlet temperature of the heat pump is less than the base air outlet temperature, then the current set air outlet temperature of the heat pump = base air outlet temperature + 1℃.

[0028] If the condition of reducing the base air outlet temperature is met, and the current air outlet temperature of the heat pump is not lower than the base air outlet temperature, then the current set air outlet temperature of the heat pump = base air outlet temperature - 1℃.

[0029] Preferably, the condition for increasing the basic outlet air temperature is:

[0030] a. The current actual temperature of the drying chamber is lower than the corresponding set temperature threshold T. 设定 a. +1℃; b. The output power of the electric heating is greater than or equal to 2% of the rated power of the electric heating; c. The heat pump is currently running.

[0031] Preferably, the condition for reducing the basic outlet air temperature is:

[0032] a. The current actual temperature of the drying chamber is greater than or equal to the corresponding set temperature threshold T. 设定 a. +1℃; b. The output power of the electric heater is less than 2% of the rated power of the electric heater; c. The heat pump is currently running.

[0033] The second objective of this invention is achieved by the following technical solution:

[0034] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the operation steps of the aforementioned centralized control and energy-saving control system.

[0035] The third objective of this invention is achieved through the following technical solution:

[0036] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the operation steps of the aforementioned centralized control and energy-saving control system.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] The centralized energy-saving control system of the present invention collects the temperature control status of the electric heating by the first system, and then starts the second system to control the outlet air temperature of the heat pump. This allows the electric heating and the heat pump to operate independently. It does not require changing the control logic of the original heating system, and after adding the heat pump, it can combine the control logic of the heat pump to preheat the fresh air and utilize the energy-saving effect of the heat pump, thereby further improving the energy-saving effect of the drying oven. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the heating air system of a conventional oven.

[0040] Figure 2 This is a schematic diagram of the heating air system of the oven of the present invention;

[0041] Figure 3 for Figure 2 The diagram shows the structure of a heat pump heating system.

[0042] Figure 4 This is a view of the control structure of the centralized control energy-saving control system of the present invention.

[0043] In the diagram: 10. Oven; 11. Exhaust main duct; 20. Fresh air intake system; 21. First filter; 22. Fan; 23. Flue gas recovery heat exchanger; 30. Fresh air heating system; 31. Mixer; 32. Electric heating heat exchanger; 33. Second filter; 40. Heat pump heating system; 41. Compressor; 42. Condenser; 43. Throttling expansion valve; 44. Evaporator; 45. Separator; 50. Return air utilization system. Detailed Implementation

[0044] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In the description of this invention, it should be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intermediate elements present. Conversely, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.

[0047] Please see Figure 2 and Figure 3 This is a schematic diagram of the heating air system of the heat pump-based drying oven 10 of the present invention. The drying oven 10 is mainly used to dry the materials inside by means of hot air. Specifically, the drying oven 10 includes at least one drying chamber. Each drying chamber is provided with its own hot air inlet, exhaust outlet, and exhaust manifold 11. The exhaust manifold 11 is connected to each exhaust outlet to collect the exhaust air and discharge it uniformly. Each exhaust outlet is provided with its own first control valve for exhausting the air from the drying chamber. The top of each drying chamber is also provided with a first temperature detector and a pressure detector. The first temperature detector is used to detect the temperature in the corresponding drying chamber, and the pressure detector is used to detect the pressure in the corresponding drying chamber. In this embodiment, there are 5 drying chambers. Each drying chamber can be independent or interconnected, and each drying chamber is equipped with an independent heating air system.

[0048] The heating air system includes a fresh air intake system 20, at least one fresh air heating system 30, at least one heat pump heating system 40, at least one return air utilization system 50, and a centralized control and energy-saving control system.

[0049] The fresh air intake system 20 is sequentially arranged with a first filter 21, a fan 22, and a flue gas recovery heat exchanger 23 along the fresh air flow direction. The first filter 21 is used to filter the intake air, and the flue gas recovery heat exchanger 23 is located on the exhaust main duct 11 to recover waste heat from the exhaust air. The fan 22 is a blower, and its power is related to the valve opening degree before each fresh air heating system 30. In another embodiment, the fan 22 can also be located at the inlet of the fresh air heating system 30, meaning each fresh air heating system 30 has its own fan 22. When each drying chamber is started, its respective fan 22 is activated to adjust the air intake volume. In this embodiment, the first filter 21 is a pre-filter.

[0050] The fresh air heating system 30 is connected to the fresh air intake system 20 and the hot air inlet of the drying chamber. Along the fresh air flow direction, the fresh air heating system 30 is sequentially equipped with a mixer 31, an electric heating heat exchanger 32, and a second filter 33. One side of the mixer 31 is connected to the return air utilization system 50 for uniform mixing of fresh air and return air. The mixed fresh air is then input into the electric heating heat exchanger 32 for heat exchange. The outlet of the second filter 33 is connected to the hot air inlet of its respective drying chamber. In this embodiment, the electric heating heat exchanger 32 is equipped with an electric heating coil. The number of fresh air heating systems 30 corresponds to the number of drying chambers, used to independently control the temperature of each drying chamber. Each fresh air heating system 30 has a second control valve at its front end. The second filter 33 is a high-temperature resistant medium-efficiency filter / high-temperature resistant high-efficiency filter. The mixer 31 is a mixing tank, mixing pipe, or ejector. A second temperature detector is also provided on the mixer 31 to detect the temperature of the mixed air / before the electric heating heat exchanger 32.

[0051] The heat pump heating system 40 is located between the fresh air intake system 20 and the fresh air heating system 30, and is used to preheat the fresh air. Specifically, the heat pump heating system 40 includes a compressor 41, a condenser 42, a throttling expansion valve 43, an evaporator 44, and a separator 45 connected end to end. Figure 3 As shown, the heat exchange ends of the condenser 42 are connected to the flue gas recovery heat exchanger 23 and the mixer 31 respectively. That is, the condenser 42 is installed on the fresh air heating system 30, and the fresh air is preheated through the condenser 42.

[0052] The return air utilization system 50 is used to recover waste heat from the exhaust air and introduce a portion of the return air into the fresh air supply to save some of the energy required for heating the fresh air. The two ends of the return air utilization system 50 are connected to the exhaust main duct 11 and the mixer 31, respectively. Each return air utilization system 50 is equipped with a third control valve. In this embodiment, the number of return air utilization systems 50 corresponds to the number of fresh air heating systems 30, and the return air volume is determined based on the exhaust temperature and pressure. Specific details are referenced from existing control technologies and will not be elaborated here.

[0053] The centralized energy-saving control system includes a first system and a second system. The first system is used to control the fresh air heating system 30, the fresh air intake system 20, and the return air utilization system 50, which is the original control system of the oven 10. The second system is used to control the heat pump heating system 40 (hereinafter referred to as the heat pump). That is, the original control system of the oven 10 and the heat pump are independently controlled.

[0054] Specifically, such as Figure 4 As shown, the centralized energy-saving control system includes the following control steps:

[0055] S0: Collect the actual temperature inside each drying chamber of the current oven; if the actual temperature of the drying chamber is less than the corresponding set temperature threshold T... 设定 If the temperature is within the set range, proceed to step S1; otherwise, skip step S1 and monitor the actual temperature inside each drying chamber. In this step, the set temperature threshold T for each drying chamber must first be set. 设定 Set priority 。

[0056] S1: Turn on the electric heating, execute the heating mode of the first system, heat up the respective drying chambers in the oven, and run the intelligent control module to raise the temperature of the drying chamber to the set temperature threshold T. 设定 .

[0057] Understandably, the heating mode of the first system includes setting the target temperature threshold, target heating time threshold, and target pressure threshold for each drying chamber. Based on these settings, the electric heating coils and fans are activated, executing the heating curve within the target threshold to raise the temperature inside the drying chamber to the target temperature threshold. According to the heating curve of each electric heating coil, the fan opening and return air volume are adjusted. The heating curve is a PID (Proportional-Integral-Derivative) control curve, meaning the power of the electric heating coils, the fan power, and the opening of the return air valve are all controlled by PID, i.e., intelligent control module control (i.e., PID control), which is existing technology and will not be elaborated further here. The target temperature threshold can be a fixed value or a range value. When the actual temperature reaches the target temperature threshold, a heat preservation mode is executed, stabilizing the temperature fluctuation inside the drying chamber through PID control. When the heating time reaches the target heating time, a heating stop mode is executed to cool down. Generally, the set temperature threshold is higher than the ambient temperature.

[0058] S2: During the heating process of the heating mode of the first system, when the temperature of one of the drying chambers stabilizes at the set temperature threshold or reaches the preset start time, the second system is started; otherwise, the second system is not started, and the process returns to step S1 to continue executing the heating mode of the first system.

[0059] In this step, the first and second systems are two independent systems. The overall control system collects / reads the actual temperature and set temperature threshold of each drying chamber from the first control system, and then, by integrating various parameters, activates the second system to achieve energy-saving effects. Simultaneously, after the electric heating system heats the drying chamber to a certain temperature (set temperature threshold), the heat pump heating system is activated. This minimizes the power output of the electric heating system during this temperature control process while having minimal impact on the original control, thus achieving greater energy savings. If the heat pump heating system is activated simultaneously with the electric heating system (which generally requires modifying the control logic of the original control system), although greater energy savings can be achieved, it will affect the control of the intelligent control module (i.e., the original control module), leading to large fluctuations in hot air temperature and ultimately adversely affecting the drying of materials within the drying chamber.

[0060] Understandably, each drying chamber in the oven may reach the set temperature threshold simultaneously, or one drying chamber may reach the set temperature threshold first. At the same time, the set temperature thresholds of each drying chamber may be the same or different, resulting in different heating rates for each drying chamber. It is also possible that some drying chambers have not started drying and heating (e.g., the set temperature threshold is 0℃). The control system needs to perform corresponding control according to the set temperature threshold.

[0061] In one embodiment, the preset start-up time is, but not limited to, 35-45 minutes after the electric heating is turned on; preferably, the preset start-up time is, but not limited to, 40 minutes after the electric heating is turned on; the temperature threshold is set according to specific requirements, and will not be elaborated here.

[0062] S3: After the second system starts, check the status of each heat pump heating system and determine whether the "heat pump do not start sign" in the heat pump heating system (i.e., heat pump) corresponding to each drying chamber needs to be set. If the setting conditions are met, the "heat pump do not start sign" needs to be set and the heat pump is in standby mode. Otherwise, if the setting conditions are not met, the "heat pump do not start sign" does not need to be set, the heat pump is turned on, and the outlet air temperature of the heat pump is adjusted until the heat pump meets the shutdown conditions.

[0063] In the above steps, check the condition of each heat pump heating system, that is, whether the heat pump has the conditions to start, such as whether the compressor heat medium pressure meets the requirements, whether the lubricating oil condition meets the requirements, whether the evaporator meets the start-up requirements, etc.

[0064] In this embodiment, the "heat pump start-disabled flag" must be set to the following conditions simultaneously:

[0065] (1) The output power of electric heating is less than W 置位设定 In this embodiment, W 置位设定Set the output power for the heat pump, W 置位设定 This is, but is not limited to, 10% of the rated power of electric heating;

[0066] (2) The actual temperature of the drying chamber is currently at T. 设定 ±T1℃ (T1 is 1-3℃, such as T) 设定 ±1℃, T 设定 ±2℃, T 设定 ±3℃, T is preferred 设定 Within ±1℃;

[0067] (3) The heat pump is currently in a stopped state.

[0068] When the conditions for setting the "Heat Pump Do Not Start Flag" are met, the corresponding heat pump will not start. Otherwise, such as when a process change causes the output power of the electric heating to exceed 15% during the process, and the actual temperature of the drying chamber is less than T... 设定 When the temperature is ±1℃, the "heat pump do not start" flag of the heat pump will automatically reset and directly enter the start-up process to start the heat pump for auxiliary heating.

[0069] In other embodiments, the method for adjusting the outlet air temperature of the heat pump includes the following steps:

[0070] (1) Preheating stage

[0071] Set the base air outlet temperature of the heat pump, start the heat pump at the base air outlet temperature, and start timing. Within 10 minutes (this time can be set according to the heat pump situation, and is not limited to 10 minutes; it can also be other times, which will not be elaborated here), the heat pump will preheat.

[0072] Understandably, during the preheating phase, the compressor frequency fluctuates significantly due to the need for preheating, meaning the heat pump cannot guarantee stable outlet air temperature. Therefore, the second system does not coordinate with the first system's data for temperature regulation. During this period, the heat is still dissipated through the condenser to the fresh air intake. The temperature of the drying chamber at this time is controlled by the first system, specifically by electric heating.

[0073] In this step, the base outlet air temperature of the heat pump is, but is not limited to, 60°C (this base outlet air temperature is generally internally set).

[0074] (2) Temperature adjustment stage

[0075] Based on the real-time temperature inside the drying chamber, set the temperature threshold T. 设定 The system measures the electric heating output power to determine whether the base air temperature of the heat pump needs to be adjusted. If the base air temperature needs to be adjusted, the system will start adjusting the base air temperature of the heat pump after the set adjustment cycle is reached. Otherwise, the base air temperature does not need to be adjusted, and the fresh air will be preheated using the base air temperature of the heat pump.

[0076] Understandably, the adjustment setting cycle is one cycle. Within this cycle, that is, during this temperature fluctuation period, if it is determined that the basic air outlet temperature value of the heat pump needs to be increased, the air outlet temperature of the heat pump will be increased. Otherwise, the air outlet temperature of the heat pump will be decreased to avoid causing large fluctuations in the temperature adjustment of the electric heating.

[0077] In this step, the set period is adjusted to, but is not limited to, 2 minutes.

[0078] In one embodiment, the step of determining the base outlet air temperature of the heat pump is as follows:

[0079] If the condition for increasing the base air outlet temperature is met, and the current air outlet temperature of the heat pump is less than the base air outlet temperature, then the current set air outlet temperature of the heat pump = base air outlet temperature + T2℃ (T2 = 1-3℃, such as the current set air outlet temperature of the heat pump = base air outlet temperature + 1℃).

[0080] If the condition of reducing the base outlet air temperature is met, and the current outlet air temperature of the heat pump is not lower than the base outlet air temperature, then the current set outlet air temperature of the heat pump = base outlet air temperature - T2℃ (e.g., the current set outlet air temperature of the heat pump = base outlet air temperature - 1℃).

[0081] In this embodiment, the condition for increasing the basic outlet air temperature is:

[0082] a. The current actual temperature of the drying chamber is lower than the corresponding set temperature threshold T. 设定 + T1℃ (T1 is 1-3℃, such as T) 设定 +1℃, T 设定 +2℃, T 设定 +3℃, T is preferred 设定 a. The output power of the electric heating is greater than or equal to 2% of the rated power of the electric heating; b. The heat pump is currently running.

[0083] In this embodiment, the condition for reducing the basic outlet air temperature is:

[0084] a. The current actual temperature of the drying chamber is greater than or equal to the corresponding set temperature threshold T. 设定 + T1℃ (T1 is 1-3℃, such as T) 设定 +1℃, T 设定 +2℃, T 设定 +3℃, T is preferred 设定 a. The output power of the electric heating is less than 2% of the rated power of the electric heating; b. The heat pump is currently running.

[0085] In this embodiment, the heat pump meets the shutdown condition as follows: when the heat pump is at its lowest operating frequency (i.e., the compressor's output power is low, such as 5%-10% below the compressor's rated output power, resulting in poor energy-saving effect), the actual temperature of the current drying chamber is greater than T. 设定 ±T3℃ (T3 is 3-6℃, such as T) 设定 ±3℃, T 设定 ±4℃, T 设定 ±5℃, T 设定 ±6℃, preferred, T 设定 ±5℃), during the duration t 持续 The actual internal temperature has exceeded 5°C, and at the same time, the electric heating output power is less than W. 停机设定 If the "heat pump do not start" flag is set, the heat pump will stop to prevent prolonged overheating in the drying chamber. At this time, the temperature of the drying chamber will be stably controlled by the control of the first system.

[0086] In this step, W 停机设定 Set the output power (W) for when the heat pump is off. 停机设定 For, but not limited to, 1% of the rated power of electric heating, duration t 持续 =5s-10s.

[0087] In the above embodiments, after the heat pump is stopped / standby, if the heat pump meets the start-up conditions, the heat pump is turned on and the outlet air temperature of the heat pump is adjusted if the heat pump does not meet the set-up conditions.

[0088] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the operating steps of the centralized control and energy-saving control system as described above.

[0089] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the operation steps of the centralized control and energy-saving control system described above.

[0090] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A centralized energy-saving control system, comprising a first system and a second system, wherein the first system is used to control a fresh air heating system, a fresh air intake system, and a return air utilization system; the first system is also used to control the control system of the original drying oven; and the second system is used to control a heat pump heating system; wherein the first system and the second system are independent control systems, characterized in that... The centralized energy-saving control system includes the following control steps: S1: turn on the electric heating, execute the heating mode of the first system, heat and rise the temperature of each drying chamber in the oven, run the intelligent control module, and make the temperature of the drying chamber rise to the set temperature threshold T 设定 ; S2: During the heating process of the heating mode of the first system, when the temperature of one of the drying chambers stabilizes at the set temperature threshold or reaches the preset start time, the second system is started; S3: After the second system starts, determine whether the "heat pump do not start sign" in the heat pump corresponding to each drying chamber needs to be set. If the setting conditions are met, the "heat pump do not start sign" needs to be set and the heat pump is in standby mode. Otherwise, the "heat pump do not start sign" does not need to be set, the heat pump is turned on, and the outlet air temperature of the heat pump is adjusted until the heat pump meets the shutdown conditions. The "Heat pump do not start" flag must be set to the following conditions simultaneously: (1) The output power of the electric heating is less than the set output power W of the heat pump 置位设定， W 置位设定 is 10% of the rated power of the electric heating; (2) the actual temperature of the current drying chamber is within T 设定 ±1℃; (3) The heat pump is currently in a stopped state; The method for adjusting the outlet air temperature of the heat pump includes the following steps: (1) Preheating stage Start the heat pump at the base outlet air temperature and start timing. Preheat the heat pump within 10 minutes. (2) Temperature adjustment stage Based on the real-time temperature inside the drying chamber, the set temperature threshold, and the electric heating output power, determine whether it is necessary to adjust the basic air outlet temperature of the heat pump. If it is necessary to adjust the basic air outlet temperature, start adjusting the basic air outlet temperature of the heat pump after reaching the set adjustment cycle. Otherwise, it is not necessary to adjust the basic air outlet temperature, and the fresh air is preheated at the basic air outlet temperature of the heat pump. The steps for determining the basic outlet air temperature of the heat pump are as follows: If the condition for increasing the base air outlet temperature is met, and the current air outlet temperature of the heat pump is lower than the base air outlet temperature, then the current set air outlet temperature of the heat pump = base air outlet temperature + 1℃. If the condition of reducing the base outlet air temperature is met, and the current outlet air temperature of the heat pump is not lower than the base outlet air temperature, then the current set outlet air temperature of the heat pump = base outlet air temperature - 1℃. The conditions for increasing the base outlet air temperature are as follows: a. The current actual temperature of the drying chamber is lower than the corresponding set temperature threshold T. 设定 +1℃; b. The output power of the electric heater is greater than or equal to 2% of the rated power of the electric heater; c. The heat pump is currently running; The conditions for reducing the basic outlet air temperature are as follows: a. The current actual temperature of the drying chamber is greater than or equal to the corresponding set temperature threshold T. 设定 +1℃; b. The output power of the electric heater is less than 2% of the rated power of the electric heater; c. The heat pump is currently running.

2. The centralized control and energy-saving control system according to claim 1, characterized in that, In step S1, the intelligent control module is a PID control module; in step S2, the preset start-up time is 35-45 minutes after the electric heating is turned on.

3. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the operation steps of the centralized control and energy-saving control system according to any one of claims 1-2.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the operation steps of the centralized control and energy-saving control system according to any one of claims 1-2.

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