Energy-saving control method of process system and electronic equipment

Abstract

The embodiment of the invention discloses an energy-saving control method of a process system and electronic equipment, in the embodiment of the invention, the process system comprises a medium-temperature hot water tank, a power frequency screw heat pump, a host pump, a first temperature transmitter and the electronic equipment, and the first temperature transmitter is arranged in the medium-temperature hot water tank; the electronic equipment obtains the first temperature measured by the first temperature transmitter; and if the first temperature is smaller than the preset temperature of the medium-temperature hot water tank, the power frequency screw heat pump and the main machine pump are started, so that the temperature of water in the medium-temperature hot water tank reaches the preset temperature of the medium-temperature hot water tank, and energy-saving control is achieved. And compared with water required for heating an electric heating pipe made of an electric heating wire with relatively high energy consumption in manual operation, the electric heating pipe is convenient and quick, and the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy-saving control technology, and in particular to an energy-saving control method and electronic equipment for a process system. Background Art

[0002] With the development of economy, in response to the national call for energy conservation, electronics factories are faced with the challenge of how to save energy. At present, electronics factories mainly rely on manual start and stop operation of electric heating tubes made of electric heating wires, so that the water in the medium-temperature hot water tank reaches the temperature required for production. However, the resistance of the electric heating wire is large, which leads to high energy consumption of this heating method, and manual control of the heating process causes waste of human resources. Therefore, this process operation mode needs to be improved urgently to save production costs and reduce energy consumption. Summary of the invention

[0003] The embodiments of the present application provide an energy-saving control method and electronic equipment for a process system, which are used to solve the problem of high energy consumption caused by manually using an electric heating tube made of an electric heating wire to heat water in a medium-temperature hot water tank in the related art.

[0004] In a first aspect, an energy-saving control method for a process system is provided, wherein the process system comprises: a medium-temperature hot water tank, an industrial frequency screw heat pump, a host pump, a first temperature transmitter, and an electronic device, wherein the first temperature transmitter is arranged inside the medium-temperature hot water tank, and the method is applied to the electronic device, and the method comprises:

[0005] Obtaining a first temperature measured by the first temperature transmitter;

[0006] Determine whether the first temperature is lower than a preset first target temperature; if so, start the industrial frequency screw heat pump and the main engine pump; circulate the water in the medium-temperature hot water tank to the industrial frequency screw heat pump through the main engine pump, heat the water passing through the industrial frequency screw heat pump and circulate it to the medium-temperature hot water tank, so that the water in the medium-temperature hot water tank reaches the first target temperature.

[0007] Furthermore, the process system further comprises: a cold water tank, a cold water pump, a cold water flow pipeline, and a non-contact infrared temperature detector, wherein the cold water pump is connected to the flow pipeline on the water supply side of the cold water tank; the cold water flow pipeline is arranged outside the pump of the industrial frequency screw heat pump; the non-contact infrared temperature detector is used to detect the second temperature of the industrial frequency screw heat pump in the operating state; the cold water pump and the non-contact infrared temperature detector are respectively connected to electronic equipment, and the method further comprises:

[0008] Acquiring a second temperature of the industrial frequency screw heat pump measured by the non-contact infrared temperature detector;

[0009] Determine whether the second temperature is greater than a preset second target temperature; if so, start the cold water pump; circulate the water from the cold water tank to the cold water flow pipe through the cold water pump, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature.

[0010] Furthermore, the process system further includes: an electric regulating valve and a second temperature transmitter; the electric regulating valve is connected to the water flow pipe on the return side of the cold water tank; the second temperature transmitter is arranged inside the water flow pipe on the return side of the cold water tank; the electric regulating valve and the second temperature transmitter are respectively connected to electronic equipment, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature, and the method further includes:

[0011] Acquire a third temperature measured by the second temperature transmitter;

[0012] Determine whether the third temperature is less than a preset third target temperature; if not, determine a first target difference between the third temperature and the third target temperature; based on the correspondence between the pre-saved difference and the valve opening ratio of the electric control valve, determine the target valve opening ratio corresponding to the first target difference, and adjust the electric control valve to the target valve opening ratio.

[0013] Furthermore, the process system further includes: an air compressor waste heat recovery machine and a waste heat recovery circulation pump, the air compressor waste heat recovery machine is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the waste heat recovery circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the air compressor waste heat recovery machine; the air compressor waste heat recovery machine and the waste heat recovery circulation pump are respectively connected to electronic equipment, and before starting the industrial frequency screw heat pump and the host pump, the method further includes:

[0014] Control the air compressor waste heat recovery machine and the waste heat recovery circulation pump to start, and transport the water in the medium-temperature hot water tank to the air compressor waste heat recovery machine through the waste heat recovery circulation pump, so that the air compressor waste heat recovery machine recovers the heat generated when the air compressor is working and heats the water in the medium-temperature hot water tank;

[0015] The fourth temperature measured by the first temperature transmitter is obtained, and it is determined whether the fourth temperature is less than the first target temperature. If so, the industrial frequency screw heat pump and the host pump are started.

[0016] Furthermore, the process system further comprises: a pressure transmitter and a variable frequency circulation pump, wherein the variable frequency circulation pump is connected to the water flow pipeline on the water supply side of the medium temperature hot water tank and is connected to the energy system; the pressure transmitter is arranged inside the water flow pipeline where the corresponding variable frequency circulation pump is connected to the energy system; the pressure transmitter and the variable frequency circulation pump are respectively connected to the electronic equipment, and the method further comprises:

[0017] Acquire a first pressure measured by the pressure transmitter, and determine a second difference between the first pressure and a preset first target pressure;

[0018] According to the correspondence between the preset difference and the adjustment frequency of the variable frequency circulation pump, the target adjustment frequency corresponding to the second difference is determined; according to the target adjustment frequency, the target operating frequency of the variable frequency circulation pump is determined; according to the target operating frequency, the operation of the variable frequency circulation pump is controlled so that the pressure of the water flow in the water flow pipeline where the pressure transmitter is located reaches the first target pressure.

[0019] Furthermore, the process system further comprises: a power frequency circulation pump, which is connected to a water flow pipeline on the water supply side of the medium temperature hot water tank, connected to an energy system, and connected to an electronic device. The method further comprises:

[0020] If the operating frequency of the variable frequency circulation pump reaches the maximum value and lasts for more than a preset time range, and the first pressure still does not reach the first target pressure, the industrial frequency circulation pump is started to make the pressure of the water flow in the water flow pipe where the pressure transmitter is located reach the first target pressure.

[0021] Further, the process system also includes: a plate heat exchanger circulation pump, a plate heat exchanger, a water tank, a water tank circulation pump and a third temperature transmitter; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the plate heat exchanger circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the plate heat exchanger; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the water tank; the water tank circulation pump is connected to the water flow pipe on the water supply side of the water tank and is connected to the plate heat exchanger; the third temperature transmitter is arranged inside the water tank; the plate heat exchanger circulation pump, the plate heat exchanger, the water tank circulation pump, and the third temperature transmitter are respectively connected to electronic equipment, and the method also includes:

[0022] Acquiring a fifth temperature measured by the third temperature transmitter;

[0023] Determine whether the fifth temperature is lower than the preset fourth target temperature; if so, circulate the water in the medium-temperature hot water tank to the plate heat exchanger through the plate heat exchanger circulation pump, and transport the water in the water tank to the plate heat exchanger through the water tank circulation pump; convert the water in the water tank to the fourth target temperature through the plate heat exchanger.

[0024] Furthermore, the method further comprises:

[0025] By adding card edge control and foolproof control to the electronic equipment control, the opening ratio of the electric regulating valve is within the preset limit of the electric regulating valve device; the frequency of the variable frequency circulating pump is within the preset limit of the variable frequency circulating pump device.

[0026] Furthermore, the method further comprises:

[0027] Based on a preset pressure range, it is determined whether the first pressure exceeds the pressure range; if so, an alarm is output and the variable frequency circulation pump is automatically stopped.

[0028] In a second aspect, a device for an energy-saving control method of a process system is provided, wherein the process system comprises: a medium-temperature hot water tank, an industrial frequency screw heat pump, a host pump, a first temperature transmitter and an electronic device, wherein the first temperature transmitter is arranged inside the medium-temperature hot water tank, the method is applied to the electronic device, and the device comprises:

[0029] An acquisition module, used for acquiring a first temperature measured by the first temperature transmitter;

[0030] A judging module, used for judging whether the first temperature is lower than a preset first target temperature;

[0031] A processing module is used to start the industrial frequency screw heat pump and the main engine pump if the first temperature is lower than a preset first target temperature; circulate the water in the medium-temperature hot water tank to the industrial frequency screw heat pump through the main engine pump, heat the water passing through the industrial frequency screw heat pump and circulate it to the medium-temperature hot water tank, so that the water in the medium-temperature hot water tank reaches the first target temperature.

[0032] Furthermore, the process system further comprises: a cold water tank, a cold water pump, a cold water flow pipeline, and a non-contact infrared temperature detector, wherein the cold water pump is connected to the water flow pipeline on the water supply side of the cold water tank; the cold water flow pipeline is arranged outside the pump of the industrial frequency screw heat pump; the non-contact infrared temperature detector is used to detect the second temperature of the industrial frequency screw heat pump in the operating state; the cold water pump and the non-contact infrared temperature detector are respectively connected to the electronic device; the acquisition module is also used to obtain the second temperature of the industrial frequency screw heat pump measured by the non-contact infrared temperature detector;

[0033] The judging module is further used to judge whether the second temperature is greater than a preset second target temperature;

[0034] The processing module is also used to start the cold water pump if the second temperature is greater than a preset second target temperature; circulate the water in the cold water tank to the cold water flow pipe through the cold water pump, and the cold water flowing through the cold water flow pipe makes the second temperature lower than the preset second target temperature.

[0035] Furthermore, the process system further comprises: an electric regulating valve and a second temperature transmitter; the electric regulating valve is connected to the water flow pipe on the return side of the cold water tank; the second temperature transmitter is arranged inside the water flow pipe on the return side of the cold water tank; the electric regulating valve and the second temperature transmitter are respectively connected to electronic equipment, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature; the acquisition module is also used to acquire the third temperature measured by the second temperature transmitter;

[0036] The judging module is further configured to judge whether the third temperature is lower than a preset third target temperature;

[0037] The processing module is also used to determine a first target difference between the third temperature and the third target temperature if the third temperature is not less than a preset third target temperature; determine a target valve opening ratio corresponding to the first target difference based on a correspondence between a pre-saved difference and the valve opening ratio of the electric regulating valve, and adjust the electric regulating valve to the target valve opening ratio.

[0038] Furthermore, the process system also includes: an air compressor waste heat recovery machine and a waste heat recovery circulation pump, the air compressor waste heat recovery machine is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the waste heat recovery circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank, and is connected to the air compressor waste heat recovery machine; the air compressor waste heat recovery machine and the waste heat recovery circulation pump are respectively connected to electronic equipment, and before starting the industrial frequency screw heat pump and the main engine pump, the processing module is also used to control the air compressor waste heat recovery machine and the waste heat recovery circulation pump to start, and the water in the medium-temperature hot water tank is transported to the air compressor waste heat recovery machine through the waste heat recovery circulation pump, so that the air compressor waste heat recovery machine can recover the heat generated when the air compressor is working and heat the water in the medium-temperature hot water tank;

[0039] The acquisition module is further used to acquire a fourth temperature measured by the first temperature transmitter;

[0040] The judging module is further configured to judge whether the fourth temperature is lower than the first target temperature;

[0041] The processing module is further configured to start the industrial frequency screw heat pump and the host pump if the fourth temperature is lower than the first target temperature.

[0042] Furthermore, the process system further comprises: a pressure transmitter and a variable frequency circulation pump, wherein the variable frequency circulation pump is connected to the water flow pipeline on the water supply side of the medium temperature hot water tank and is connected to the energy system; the pressure transmitter is arranged inside the water flow pipeline connecting the corresponding variable frequency circulation pump and the energy system; the pressure transmitter and the variable frequency circulation pump are respectively connected to the electronic device, and the acquisition module is further used to acquire the first pressure measured by the pressure transmitter;

[0043] The processing module is also used to determine a second difference between the first pressure and a preset first target pressure; determine a target adjustment frequency corresponding to the second difference based on a correspondence between the preset difference and an adjustment frequency of the variable frequency circulation pump; determine a target operating frequency of the variable frequency circulation pump based on the target adjustment frequency; and control the operation of the variable frequency circulation pump based on the target operating frequency so that the pressure of the water flow in the water flow pipe where the pressure transmitter is located reaches the first target pressure.

[0044] Furthermore, the process system also includes: an industrial frequency circulation pump, which is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank, connected to the energy consumption system, and connected to the electronic equipment. The processing module is also used to start the industrial frequency circulation pump if the working frequency of the variable frequency circulation pump reaches a maximum value and the duration exceeds a preset time range, and the first pressure still does not reach the first target pressure, so that the pressure of the water flow in the water flow pipe where the pressure transmitter is located reaches the first target pressure.

[0045] Furthermore, the process system also includes: a plate heat exchanger circulation pump, a plate heat exchanger, a water tank, a water tank circulation pump and a third temperature transmitter; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the plate heat exchanger circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the plate heat exchanger; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the water tank; the water tank circulation pump is connected to the water flow pipe on the water supply side of the water tank and is connected to the plate heat exchanger; the third temperature transmitter is arranged inside the water tank; the plate heat exchanger circulation pump, the plate heat exchanger, the water tank circulation pump and the third temperature transmitter are respectively connected to the electronic equipment, and the acquisition module is also used to obtain the fifth temperature measured by the third temperature transmitter;

[0046] The judging module is further used to judge whether the fifth temperature is lower than a preset fourth target temperature;

[0047] The processing module is also used for circulating the water in the medium-temperature hot water tank to the plate heat exchanger through the plate heat exchanger circulation pump, and transporting the water in the water tank to the plate heat exchanger through the water tank circulation pump if the fifth temperature is lower than the preset fourth target temperature; and converting the water in the water tank to the fourth target temperature through the plate heat exchanger.

[0048] Furthermore, the processing module is also used to add card edge control and anti-foolproof control to the electronic equipment control, so that the valve opening ratio of the electric regulating valve is within the preset limit of the electric regulating valve equipment; and the frequency of the variable frequency circulating pump is within the preset limit of the variable frequency circulating pump equipment.

[0049] Furthermore, the processing module is also used to determine whether the first pressure exceeds the pressure range based on a preset pressure range; if so, an alarm is output and the variable frequency circulation pump is automatically stopped.

[0050] In a third aspect, an electronic device is provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0051] The memory is used to store computer programs;

[0052] The processor is used to implement any of the above methods when executing the program stored in the memory.

[0053] In a fourth aspect, a computer-readable storage medium is provided, wherein a computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed by a communication device, any of the methods described above is implemented.

[0054] In a fifth aspect, a computer program product is provided, the computer program product comprising: a computer program code, and when the computer program code is executed on a computer, the method described in any one of the above is implemented.

[0055] In the embodiment of the present application, the process system includes: a medium-temperature hot water tank, a power frequency screw heat pump, a main engine pump, a first temperature transmitter and an electronic device, wherein the first temperature transmitter is arranged inside the medium-temperature hot water tank; the electronic device obtains a first temperature measured by the first temperature transmitter; if the first temperature is lower than the preset temperature of the medium-temperature hot water tank, the power frequency screw heat pump and the main engine pump are started, so that the water in the medium-temperature hot water tank reaches the preset temperature of the medium-temperature hot water tank, thereby realizing energy-saving control. Compared with the manual operation with higher energy consumption of using electric heating tubes made of electric heating wires to heat the water required, it is convenient, fast and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0057] Figure 1 One of the structural schematic diagrams of a process system provided in an embodiment of the present application;

[0058] Figure 2 One of the process schematic diagrams of an energy-saving control method for a process system provided in an embodiment of the present application;

[0059] Figure 3 A second structural diagram of a process system provided in an embodiment of the present application;

[0060] Figure 4 A second process diagram of an energy-saving control method for a process system provided in an embodiment of the present application;

[0061] Figure 5 A third structural diagram of a process system provided in an embodiment of the present application;

[0062] Figure 6 A process schematic diagram of a method for controlling an electric regulating valve of a process system provided in an embodiment of the present application;

[0063] Figure 7 A fourth structural diagram of a process system provided in an embodiment of the present application;

[0064] Figure 8 A third process diagram of an energy-saving control method for a process system provided in an embodiment of the present application;

[0065] Fig. 9 A fifth structural diagram of a process system provided in an embodiment of the present application;

[0066] Fig.10 A fourth process diagram of an energy-saving control method for a process system provided in an embodiment of the present application;

[0067] Fig.11 A sixth structural diagram of a process system provided in an embodiment of the present application;

[0068] Fig.12 A fifth process diagram of an energy-saving control method for a process system provided in an embodiment of the present application;

[0069] Fig.13A detailed structural diagram of a process system provided in an embodiment of the present application;

[0070] Fig.14 A schematic diagram of a cable laying structure of a process system provided in an embodiment of the present application;

[0071] Fig.15 A schematic diagram of the on-site configuration structure of a process system provided in an embodiment of the present application;

[0072] Fig.16 A schematic diagram of the device structure of an energy-saving control method for a process system provided in an embodiment of the present application;

[0073] Fig.17 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0075] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0076] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0077] The words "connected", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. The terms "first", "second", "third" and the like involved in this application are merely used to distinguish similar objects, and do not represent a specific ordering of objects.

[0078] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0079] Embodiment 1:

[0080] Figure 1 This is one of the structural schematic diagrams of a process system provided in an embodiment of the present application.

[0081] The process system includes a medium-temperature hot water tank 101, a power-frequency screw heat pump 102, a main engine pump 103, a first temperature transmitter 104 and an electronic device 105. The medium-temperature hot water tank 101 and the power-frequency screw heat pump 102 are connected by two water pipes, namely, a water supply pipe and a return pipe of the medium-temperature hot water tank 101; the main engine pump 103 is connected to the water supply pipe of the medium-temperature hot water tank 101; the first temperature transmitter 104 is arranged inside the medium-temperature hot water tank 101; the power-frequency screw heat pump 102, the main engine pump 103 and the first temperature transmitter 104 are respectively connected to the electronic device 105.

[0082] Figure 2 One of the process schematic diagrams of an energy-saving control method for a process system provided in an embodiment of the present application, the process includes the following steps:

[0083] S201: Obtain a first temperature measured by a first temperature transmitter.

[0084] The energy-saving control method of the process system is applied to electronic equipment, which may be a programmable logic controller (PLC) host, a PC, a server or other intelligent equipment.

[0085] The temperature transmitter is used to obtain the temperature of the water flow or water in the water tank. The electronic device obtains the temperature measured by the first temperature transmitter at a certain moment, and the temperature is used as the first temperature of the water in the medium-temperature hot water tank. In a possible implementation, in order to improve the accuracy of temperature measurement, the electronic device can obtain multiple first temperatures measured by the first temperature transmitter within a preset time period, and remove abnormal values ​​from the multiple first temperatures. Based on the multiple first temperatures after removing the abnormal values, the average value of the multiple first temperatures after removing the abnormal values ​​is obtained, and the average value is determined as the first temperature of the water in the medium-temperature hot water tank.

[0086] The process of eliminating abnormal values ​​from multiple first temperatures is to determine the highest temperature value and the lowest temperature value from multiple first temperatures, eliminate them, perform mean calculation based on the eliminated multiple first temperatures, obtain the average value of the multiple first temperatures after eliminating the abnormal values, and determine the average value as the first temperature of the water in the medium-temperature hot water tank. In a possible implementation, the process of eliminating abnormal values ​​from multiple first temperatures can also be to first perform mean calculation on the obtained multiple first temperatures to obtain a first average value; based on the first average value, determine the first temperature value with the largest difference from the first average value, delete the first temperature value with the largest difference, and then perform mean calculation again to obtain the average value of the multiple first temperatures after eliminating the abnormal values, and determine the average value as the first temperature of the water in the medium-temperature hot water tank.

[0087] S202: Determine whether the first temperature is lower than a preset first target temperature.

[0088] If yes, execute S203; if no, execute S204.

[0089] The preset first target temperature may be a temperature value manually set on a display interface of an electronic device according to actual needs.

[0090] In a possible implementation, the first target temperature may also be automatically changed by the electronic device according to different temperatures required in different time periods. For example, at 9 o'clock every day, the water temperature of the medium-temperature hot water tank needs to be 50°C to meet the heat required for production and life; at 20 o'clock every day, the water temperature of the medium-temperature hot water tank needs to be 65°C to meet the heat required for production and life, then the electronic device automatically changes the set value of the first target temperature according to the specific temperature required in different time periods.

[0091] S203: Start the industrial frequency screw heat pump and the main engine pump; circulate the water in the medium temperature hot water tank to the industrial frequency screw heat pump through the main engine pump, heat the water passing through the industrial frequency screw heat pump and circulate it to the medium temperature hot water tank, so that the water in the medium temperature hot water tank reaches the first target temperature.

[0092] A screw heat pump is a device that uses a screw compressor and heat pump technology to achieve heat energy conversion. The frequency of an industrial frequency screw heat pump is a fixed value, that is, a fixed frequency screw heat pump. In the embodiment of the present application, in order to save equipment cost, the main engine pump also uses a fixed frequency circulation pump, but the present application does not limit the main engine pump to a fixed frequency circulation pump.

[0093] Before the power frequency screw heat pump and the main engine pump are started, the water in each water flow pipe is in a relatively static state. When the electronic device detects that the temperature of the water in the medium temperature hot water tank is lower than the preset first target temperature, the electronic device automatically starts the operation of the main engine pump to circulate the water in the medium temperature hot water tank back to the medium temperature hot water tank through the power frequency screw heat pump; then the electronic device will start the operation of the power frequency screw heat pump to heat the water flowing through the power frequency screw heat pump, so that the water in the medium temperature hot water tank reaches the first target temperature.

[0094] In a possible implementation, the process system is provided with an industrial frequency screw heat pump unit, which includes at least one industrial frequency screw heat pump. During the operation of the process system, if the water in the medium-temperature hot water tank of the currently operating industrial frequency screw heat pump has not reached the preset first target temperature after the set operation time, the second industrial frequency screw heat pump is started. The electronic equipment collects the load status of the industrial frequency screw heat pump equipment and automatically adds or subtracts the unit operation according to the load status of the industrial frequency screw heat pump unit.

[0095] In one possible implementation, in order to avoid the process system being unable to operate normally when a failure occurs, causing production stagnation on the energy-consuming side, the present application also sets a backup host pump and a reserved host pump for the main pump. When the main pump fails, the backup host pump is automatically started to ensure the normal operation of the process system; when both the main pump and the backup host pump fail, the reserved host pump is automatically started to ensure the normal operation of the process system.

[0096] S204: Determine that the first temperature of the water in the medium-temperature hot water tank has reached the first target temperature, and there is no need to start the industrial frequency screw heat pump and the main engine pump.

[0097] In the embodiment of the present application, the process system includes: a medium-temperature hot water tank, a power-frequency screw heat pump, a main engine pump, a first temperature transmitter and an electronic device, wherein the first temperature transmitter is arranged inside the medium-temperature hot water tank; the electronic device obtains the first temperature measured by the first temperature transmitter; if the first temperature is lower than the preset temperature of the medium-temperature hot water tank, the power-frequency screw heat pump and the main engine pump are started, so that the water in the medium-temperature hot water tank reaches the preset temperature of the medium-temperature hot water tank, thereby realizing energy-saving control. Compared with the water required for heating the electric heating tube made of the electric heating wire with high energy consumption by manual operation, it is convenient and fast and reduces energy consumption.

[0098] Embodiment 2:

[0099] In order to ensure the working efficiency of the industrial frequency screw heat pump and improve the stability and service life of the industrial frequency screw heat pump equipment, based on the above embodiments, in the embodiments of the present application, the process system also includes: a cold water tank, a cold water pump, a cold water flow pipeline, and a non-contact infrared temperature detector.

[0100] Figure 3 This is a second structural schematic diagram of a process system provided in an embodiment of the present application.

[0101] The process system includes a cold water tank 301 , a cold water pump 302 , a cold water flow pipeline 303 , and a non-contact infrared temperature detector 304 .

[0102] The cold water tank 301 and the industrial frequency screw heat pump 102 are connected by two water pipes, namely the water supply pipe and the return pipe of the cold water tank 301; the cold water pump 302 is connected to the water supply pipe of the cold water tank 301; the cold water pipe 303 is arranged on the outside of the pump of the industrial frequency screw heat pump 102; the non-contact infrared temperature detector 304 is used to detect the second temperature of the industrial frequency screw heat pump 102 in the operating state; the cold water pump 302 and the non-contact infrared temperature detector 304 are respectively connected to the electronic device 105.

[0103] Figure 4 The second process diagram of an energy-saving control method for a process system provided in an embodiment of the present application includes the following steps:

[0104] S401: Acquire a second temperature of the industrial frequency screw heat pump measured by a non-contact infrared temperature detector.

[0105] Through the preset communication protocol (MODBUS RTU), the electronic device collects the internal parameters of the industrial frequency screw heat pump equipment, such as: the internal temperature of the industrial frequency screw heat pump, operating status, load rate, outlet water temperature setting, start and stop unit and other parameters.

[0106] The second temperature of the power frequency screw heat pump refers to the temperature generated by the power frequency screw heat pump itself when it heats the water flowing through it. A non-contact infrared temperature detector is a device used to measure the surface temperature of an object. It determines the temperature through the infrared radiation emitted by the measured object without direct contact with the surface of the object.

[0107] In a possible implementation, a contact temperature detector may be selected for measuring the second temperature of the power frequency screw heat pump. The temperature probe of the contact temperature detector will be installed near the pump body, so that the real-time temperature of the pump body can be directly monitored. The specific location varies depending on the structural design, use environment and safety standards of different screw heat pumps. In the actual installation process, it is necessary to select and adjust according to the specific situation.

[0108] S402: Determine whether the second temperature is greater than a preset second target temperature.

[0109] If yes, execute S403; if no, execute S404.

[0110] The preset second target temperature is the maximum temperature that the industrial frequency screw heat pump can withstand while meeting the needs.

[0111] In order to ensure that the industrial frequency screw heat pump operates within a suitable temperature range and improve the stability and service life of the equipment, based on a non-contact infrared temperature detector, the electronic device can obtain in real time the second temperature of the industrial frequency screw heat pump in the running state, and determine whether the second temperature of the industrial frequency screw heat pump exceeds the preset second target temperature.

[0112] In a possible implementation, when the monitoring temperature of the power frequency screw heat pump is set, a temperature range can also be set. The temperature range is set according to the actual needs of the process system. When the second temperature detected is greater than the maximum value in the set temperature range, the system executes step 403; when the second temperature detected is less than the minimum value in the set temperature range, the power frequency screw heat pump may be in an idling fault state. The system can output an alarm message according to the fault detection mechanism to prompt the staff that the equipment is in an abnormal state and automatically stop the operation of the power frequency screw heat pump; when the second temperature detected is within the set temperature range, it is in a normal state and there is no need to start the cold water pump.

[0113] S403: Start the cold water pump to circulate the water in the cold water tank to the cold water flow pipe through the cold water pump, and the cold water flowing through the cold water flow pipe makes the second temperature lower than the preset second target temperature.

[0114] The cold water flow pipeline is arranged outside the pump of the power frequency screw heat pump, and the cold water flow pipeline is spirally wound on the equipment outside the pump. When the second temperature of the power frequency screw heat pump during operation is greater than the preset second target temperature, the system will automatically start the cold water pump 302 connected to the water flow pipeline on the water supply side of the cold water tank 301, so that the water in the cold water tank circulates to the outside of the pump of the power frequency screw heat pump to cool down the power frequency screw heat pump.

[0115] In one possible implementation, in order to avoid the problem of being unable to cool down the industrial frequency screw heat pump normally when a failure occurs, causing damage to the equipment, the present application also provides a backup cold water pump and a reserved cold water pump for the cold water pump. When the cold water pump fails, the system will automatically start the backup cold water pump to ensure that the industrial frequency screw heat pump cools down normally; when both the cold water pump and the backup cold water pump fail, the system will automatically start the reserved cold water pump to ensure that the industrial frequency screw heat pump cools down normally.

[0116] S404: Determine that the second temperature of the industrial frequency screw heat pump is lower than the second target temperature, and there is no need to start the cold water pump.

[0117] In an embodiment of the present application, by real-time monitoring of the second temperature during the operation of the industrial frequency screw heat pump, if the detected second temperature is greater than the preset second target temperature, the cold water pump is started to circulate the water in the cold water tank to cool the industrial frequency screw heat pump, thereby ensuring the working efficiency of the industrial frequency screw heat pump and improving the stability and service life of the industrial frequency screw heat pump equipment, thereby achieving energy-saving effects in this regard.

[0118] Embodiment 3:

[0119] In order to save investment costs, the cold water pump used in the embodiment of the present application is an industrial frequency circulation pump. However, in actual application, the fixed water flow rate provided by the industrial frequency circulation pump may not meet the requirements of the industrial frequency screw heat pump. Therefore, in order to meet the working conditions of the industrial frequency screw heat pump, on the basis of the above embodiment, in the embodiment of the present application, the process system also includes: an electric control valve and a second temperature transmitter.

[0120] Figure 5 The third structural schematic diagram of a process system provided in an embodiment of the present application.

[0121] The process system includes an electric regulating valve 501 and a second temperature transmitter 502 .

[0122] The electric regulating valve 501 is connected to the water flow pipe on the return side of the cold water tank 301; the second temperature transmitter 502 is arranged inside the water flow pipe on the return side of the cold water tank; the electric regulating valve 501 and the second temperature transmitter 502 are respectively connected to the electronic device 105.

[0123] Figure 6 A process schematic diagram of a method for controlling an electric regulating valve of a process system provided in an embodiment of the present application, the process comprising the following steps:

[0124] S601: Obtain a third temperature measured by a second temperature transmitter.

[0125] The second temperature transmitter is set inside the water flow pipe on the return side of the cold water tank to detect the temperature of the water in the cold water flow pipe after passing through the power frequency screw heat pump. If the temperature is too high, it proves that the water flow in the cold water flow pipe cannot meet the cooling demand of the power frequency screw heat pump.

[0126] S602: Determine whether the third temperature is lower than a preset third target temperature.

[0127] If not, execute S603; if so, execute S605.

[0128] The third temperature is used to determine whether the water temperature in the cold water flow pipe is lower than the equipment temperature of the power frequency screw heat pump. For example, if the equipment temperature of the power frequency screw heat pump is 40°C, and the water flow pipe on the return side of the cold water tank is 45°C, the power frequency screw heat pump will not be cooled by the water in the cold water flow pipe outside the power frequency screw heat pump. Therefore, it is necessary to detect the water temperature in the cold water flow pipe and regulate the water flow in the cold water flow pipe.

[0129] In the embodiment of the present application, the preset third target temperature needs to be set according to the actual application situation, and is generally selected to be lower than the preset second target temperature.

[0130] S603: Determine a first target difference between the third temperature and the third target temperature.

[0131] Based on the third temperature and the preset third target temperature, the difference between the current water temperature in the cold water flow pipe and the preset third target temperature is determined, and the difference is used as the first target difference that needs to be adjusted.

[0132] S604: Determine a target valve opening ratio corresponding to the first target difference according to the pre-stored correspondence between the difference and the valve opening ratio of the electric control valve, and adjust the electric control valve to the target valve opening ratio.

[0133] After calculating the first target difference between the third temperature and the preset third target temperature, the target valve opening ratio corresponding to the first target difference is determined according to the correspondence between the pre-saved difference and the valve opening ratio of the electric control valve, and the electric control valve is adjusted to the target valve opening ratio. The electronic device pre-saves a one-to-one correspondence between multiple differences and multiple valve opening ratios. For example, the calculated first target difference is 5°C, and the valve opening ratio of the electric control valve corresponding to the pre-saved difference of 5°C is 40%, then the electric control valve is directly adjusted to a 40% valve opening state; the calculated first target difference is 6°C, and the valve opening ratio of the electric control valve corresponding to the pre-saved difference of 6°C is 43%, then the electric control valve is directly adjusted to a 43% valve opening state.

[0134] In a possible implementation, after calculating the first target difference between the third temperature and the preset third target temperature, the electronic device can determine whether the first target difference is greater than a preset threshold value. The preset threshold value can be 0 or any value. If the first target difference is greater than the preset threshold value, then based on the correspondence between the pre-saved difference and the valve opening ratio of the electric regulating valve, the electric regulating valve is adjusted to the target valve opening ratio. Specifically, the electronic device can increase the target valve opening ratio based on the current valve opening ratio of the electric regulating valve; if the first target difference is not greater than the preset threshold value, then based on the correspondence between the pre-saved difference and the valve opening ratio of the electric regulating valve, the electric regulating valve is adjusted to the target valve opening ratio. Specifically, the electronic device can reduce the target valve opening ratio based on the current valve opening ratio of the electric regulating valve.

[0135] For example: the calculated first target difference is 5°C, the preset threshold is 3°C, and the pre-saved difference of 5°C corresponds to an opening ratio of the electric control valve of 10%. At this time, the electronic device increases the opening ratio of the electric control valve by 10% based on the current opening ratio of the electric control valve; for another example: the calculated first target difference is 5°C, the preset threshold is 8°C, and the pre-saved difference of 5°C corresponds to an opening ratio of the electric control valve of 10%. At this time, the electronic device reduces the opening ratio of the electric control valve by 10% based on the current opening ratio of the electric control valve.

[0136] In another possible implementation, when the system detects that the fixed water flow rate provided by the industrial frequency circulation pump may not meet the requirements of the industrial frequency screw heat pump, the system directly adjusts the electric regulating valve to the maximum valve opening ratio.

[0137] S605: Maintain the opening ratio of the electric control valve.

[0138] In an embodiment of the present application, an industrial frequency circulation pump is used as a cold water pump, and the electric regulating valve is automatically adjusted and controlled by a feedback mechanism (PID) according to the return water temperature. Specifically, based on the correspondence between the real-time detected third temperature and the preset difference and the opening ratio of the electric regulating valve, the electronic device controls and adjusts the opening ratio of the electric regulating valve in real time, thereby controlling the flow rate of water in the water flow pipeline, achieving the effect of adjusting the cooling effect according to the actual equipment conditions of the industrial frequency screw heat pump, thereby saving production costs.

[0139] Embodiment 4:

[0140] In order to achieve sufficient energy saving, on the basis of the above embodiments, in the embodiment of the present application, the process system also includes: an air compressor waste heat recovery machine and a waste heat recovery circulation pump. Before starting the industrial frequency screw heat pump and the main engine pump, the method also includes: controlling the air compressor waste heat recovery machine to start, so that the air compressor waste heat recovery machine can recover the heat generated by the air compressor during operation to heat the water pipe and water flow pipeline.

[0141] Figure 7 This is a fourth structural schematic diagram of a process system provided in an embodiment of the present application.

[0142] The process system includes an air compressor waste heat recovery machine 701 and a waste heat recovery circulation pump 702.

[0143] The air compressor waste heat recovery machine 701 is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank 101; the waste heat recovery circulation pump 702 is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank 101, and is connected to the air compressor waste heat recovery machine 701; the air compressor waste heat recovery machine 701 and the waste heat recovery circulation pump 702 are respectively connected to the electronic equipment 105.

[0144] Figure 8 The third process diagram of an energy-saving control method for a process system provided in an embodiment of the present application includes the following steps:

[0145] S800: Obtain a first temperature measured by a first temperature transmitter, and determine whether the first temperature is less than a preset first target temperature.

[0146] Step 800 in the embodiment of the present application is the same as step 201 and step 202 in the above embodiment, and will not be described in detail.

[0147] S801: If the first temperature is lower than the preset first target temperature, the air compressor waste heat recovery machine and the waste heat recovery circulation pump are controlled to start, and the water in the medium-temperature hot water tank is transported to the air compressor waste heat recovery machine through the waste heat recovery circulation pump, so that the air compressor waste heat recovery machine can recover the heat generated by the air compressor during operation and heat the water in the medium-temperature hot water tank.

[0148] In actual applications, in view of the large amount of heat energy generated during the operation of the air compressor, in order to efficiently utilize this part of the resource, the process system is carefully designed into an air compressor waste heat recovery machine. The air compressor waste heat recovery machine is connected to the water flow pipes on the water supply and return sides of the medium-temperature hot water tank, and is also connected to the electronic equipment. Before starting the industrial frequency screw heat pump and the main engine pump, the electronic equipment will pre-instruct the air compressor waste heat recovery machine to start. This move is intended to timely capture and recycle the heat released during the operation of the air compressor, and directly heat the water flow transported by the waste heat recovery circulation pump in the pipeline. This method not only realizes the effective recovery and reuse of energy, but also improves the energy efficiency of the overall system, highlighting the dual optimization of environmental protection and economic benefits.

[0149] S802: Obtain a fourth temperature measured by the first temperature transmitter.

[0150] After controlling the air compressor waste heat recovery machine and the waste heat recovery circulation pump to start for a preset fixed time, the first temperature transmitter measures the water temperature in the medium-temperature hot water tank again, or the first temperature transmitter measures the water temperature in the medium-temperature hot water tank in real time.

[0151] S803: Determine whether the fourth temperature is lower than the first target temperature.

[0152] If yes, execute S804; if no, execute S805.

[0153] S804: Start the industrial frequency screw heat pump and the main engine pump.

[0154] After controlling the air compressor waste heat recovery machine and the waste heat recovery circulation pump to start for a preset fixed time, the fourth temperature is still lower than the preset first target temperature, that is, the water temperature in the medium-temperature hot water tank does not meet the demand. At this time, the process system starts the industrial frequency screw heat pump and the main engine pump, and executes step 203.

[0155] S805: Stop the operation of the air compressor waste heat recovery machine and the waste heat recovery circulation pump.

[0156] In the embodiment of the present application, the heat generated by the air compressor is recovered by the air compressor waste heat recovery device and the water in the medium-temperature hot water tank is heated, which effectively utilizes multiple heating methods, realizes the effective recovery and reuse of energy, and thus fully saves energy.

[0157] Embodiment 5:

[0158] In order to perform energy-saving control in all aspects, the present application also performs energy-saving control on the energy-consuming side. In the embodiment of the present application, the process system also includes: a pressure transmitter and a variable frequency circulation pump. The energy-consuming side can be a workshop process and / or a workshop air-conditioning system, which is not limited here.

[0159] Fig. 9 This is a fifth structural diagram of a process system provided in an embodiment of the present application.

[0160] The process system includes a pressure transmitter 901 and a variable frequency circulation pump 902 .

[0161] The variable frequency circulation pump 902 is connected to the water flow pipeline on the water supply side of the medium temperature hot water tank 101, and is connected to the energy system 903; the pressure transmitter 901 is arranged inside the water flow pipeline connecting the corresponding variable frequency circulation pump 902 and the energy system 903; the pressure transmitter 901 and the variable frequency circulation pump 902 are respectively connected to the electronic equipment 105.

[0162] Fig.10 A fourth process diagram of an energy-saving control method for a process system provided in an embodiment of the present application, the process includes the following steps:

[0163] S1001: Obtain a first pressure measured by a pressure transmitter, and determine a second difference between the first pressure and a preset first target pressure.

[0164] The pressure transmitter is arranged inside the water flow pipeline connecting the variable frequency circulation pump and the energy consumption system, and is used to detect the water flow pressure in the water flow pipeline of the variable frequency circulation pump outlet.

[0165] The first target pressure can be set by the operator according to the actual needs of the energy consumption system, or it can be set by collecting multiple first pressures measured by the pressure transmitter, and calculating the optimal setting value of the first target pressure in the electronic device through the mechanism and historical data, and sending the calculated optimal setting value to the PLC device that controls the actual operation. In other words, based on the historical data of the first pressure detected at different times, the historical data is fitted into a continuous curve, and the average value is calculated by obtaining multiple curves to determine the optimal setting value. Among them, the horizontal axis of the continuous curve represents each time of the day, and the vertical axis represents the first pressure value at each time.

[0166] The second difference can be a positive value or a negative value. When the second difference is a positive value, it means that the water flow pressure provided by the current operating frequency of the variable frequency circulation pump is higher than the water flow pressure required by the energy consumption side; when the second difference is a negative value, it means that the water flow pressure provided by the current operating frequency of the variable frequency circulation pump is lower than the water flow pressure required by the energy consumption side.

[0167] S1002: Determine a target adjustment frequency corresponding to the second difference according to a correspondence between a preset difference and an adjustment frequency of a variable frequency circulation pump.

[0168] After obtaining the pressure measured by the pressure transmitter, the electronic device can determine a second difference between the pressure measured by the pressure transmitter and a preset target pressure corresponding to the pressure transmitter. In order to achieve energy-saving control, the electronic device locally pre-saves the correspondence between the difference and the adjustment frequency of the variable frequency circulation pump, and the electronic device can obtain the target adjustment frequency corresponding to the second difference.

[0169] For example, the correspondence between the difference and the adjustment frequency of the variable frequency circulation pump stored locally may be as follows: when the difference is 5Mpa, the target adjustment frequency is 10Hz; when the difference is 6Mpa, the target adjustment frequency is 15Hz; when the difference is -5Mpa, the target adjustment frequency is -10Hz. The specific correspondence can be corrected and set by the operator according to the actual situation.

[0170] S1003: According to the target adjustment frequency, the target operating frequency of the variable frequency circulation pump is determined.

[0171] After obtaining the target frequency, the target operating frequency of the variable frequency circulation pump is determined. For example, when the difference is 5Mpa and the operating frequency of the variable frequency circulation pump is 15Hz, the target adjustment frequency is increased by 10Hz on the basis of the operating frequency of the variable frequency circulation pump of 15Hz, that is, the target operating frequency is 25Hz; when the difference is -5Mpa and the operating frequency of the variable frequency circulation pump is 15Hz, the target adjustment frequency is reduced by 10Hz on the basis of the operating frequency of the variable frequency circulation pump of 15Hz, that is, the target operating frequency is 5Hz.

[0172] S1004: According to the target operating frequency, the variable frequency circulation pump is controlled to operate so that the pressure of the water flow in the water flow pipeline where the pressure transmitter is located reaches a first target pressure.

[0173] According to step 1003, the target operating frequency of the current variable frequency circulation pump is determined, and the electronic device automatically adjusts (pid) the operation of the variable frequency circulation pump through a feedback mechanism, so that the pressure of the water flow in the water flow pipeline where the pressure transmitter is located reaches the first target pressure, ensuring the adjustment of the frequency of the variable frequency circulation pump.

[0174] In an embodiment of the present application, when performing energy-saving control on the energy-consuming side, the process system also includes a variable frequency circulation pump and a pressure transmitter, and the electronic device obtains the pressure measured by the pressure transmitter; determines a second difference between the pressure and a target pressure pre-saved for the pressure transmitter; determines a target adjustment frequency corresponding to the second difference based on a correspondence between the pre-saved difference and an adjustment frequency of the variable frequency circulation pump; and adjusts the operating frequency of the variable frequency circulation pump based on the target adjustment frequency, so that the pressure of the water flowing out of the water pipe reaches the target pressure, thereby achieving energy-saving control.

[0175] Embodiment 6:

[0176] In order to achieve full energy saving, based on the above-mentioned embodiment 5, in the embodiment of the present application, the process system further includes: a power frequency circulation pump, which is connected to the water flow pipeline on the water supply side of the medium-temperature hot water tank, connected to the energy system, and connected to the electronic equipment, and the method further includes:

[0177] If the operating frequency of the variable frequency circulation pump reaches the maximum value and lasts for more than a preset time range, and the first pressure still does not reach the first target pressure, the industrial frequency circulation pump is started to make the water pressure in the water flow pipe where the pressure transmitter is located reach the first target pressure.

[0178] The maximum operating frequency of the variable frequency circulating pump may be the highest frequency at which the variable frequency circulating pump device can operate, or may be a frequency preset by an operator based on actual energy consumption or device life of the variable frequency circulating pump device.

[0179] When designing this application, it is taken into consideration that the variable frequency circulation pump may not meet the production needs of the energy-consuming side for a long time or there may be a failure of the variable frequency circulation pump equipment. Therefore, a standby circulation pump and a reserved circulation pump are provided in the same water flow pipeline of the variable frequency circulation pump. In order to save production costs, both the standby circulation pump and the reserved circulation pump use industrial frequency circulation pumps. The electronic device can also determine whether it is necessary to start the standby circulation pump or the reserved circulation pump according to the water flow pressure in the water flow pipeline. When the water flow pressure is low, the number of circulating water pumps can be increased to achieve the purpose of optimal operating efficiency; when the water flow pressure is up to standard, the number of circulating water pumps can be reduced to avoid low-frequency operation of the variable frequency circulation pump and unnecessary energy waste.

[0180] In an embodiment of the present application, the process system also includes: an industrial frequency circulation pump. When the operating frequency of the variable frequency circulation pump reaches a maximum value and the duration exceeds a preset time range, and the first pressure still does not reach the first target pressure, the system starts the industrial frequency circulation pump to make the pressure of the water flow in the water flow pipe where the pressure transmitter is located reach the first target pressure, thereby ensuring the normal operation of the process system.

[0181] Embodiment 7:

[0182] In order to perform energy-saving control in all aspects, the present application also performs energy-saving control on the energy-consuming side. In the embodiment of the present application, the process system also includes: a plate heat exchanger circulating pump, a plate heat exchanger, a water tank, a water tank circulating pump and a third temperature transmitter.

[0183] Fig.11 This is the sixth structural diagram of a process system provided in an embodiment of the present application.

[0184] The process system includes a plate heat exchanger circulation pump 1101 , a plate heat exchanger 1102 , a water tank 1103 , a water tank circulation pump 1104 and a third temperature transmitter 1105 .

[0185] The plate changer 1102 is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank 101; the plate changer circulating pump 1101 is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank 101, and is connected to the plate changer 1102; the plate changer 1102 is connected to the water flow pipes on the water supply side and the return side of the water tank 1103; the water tank circulating pump 1104 is connected to the water flow pipe on the water supply side of the water tank 1103, and is connected to the plate changer 1102; the third temperature transmitter 1105 is arranged inside the water tank; the plate changer circulating pump 1101, the plate changer 1102, the water tank circulating pump 1104 and the third temperature transmitter 1105 are respectively connected to the electronic device 105.

[0186] Fig.12 A fifth process diagram of an energy-saving control method for a process system provided in an embodiment of the present application, the process includes the following steps:

[0187] S1201: Obtain a fifth temperature measured by a third temperature transmitter.

[0188] The third temperature transmitter is arranged inside the water tank. The water tank used in the present application is applied to the dormitory hot water tank to provide living water for the dormitory, but is not limited to the dormitory. The third temperature transmitter can measure the fifth temperature of the water in the water tank in real time, or it can measure the fifth temperature of the water in the water tank at intervals.

[0189] S1202: Determine whether the fifth temperature is lower than a preset fourth target temperature.

[0190] If yes, execute S1203; if no, execute S1204.

[0191] The preset fourth target temperature may be a temperature value manually set on a display interface of the electronic device according to actual needs.

[0192] In a possible implementation, the fourth target temperature may also be automatically changed by the electronic device according to different temperatures required in different time periods. For example, at 9 o'clock every day, the water temperature of the water tank needs to be 40°C to meet the heat required for production and life; at 20 o'clock every day, the water temperature of the water tank needs to be 50°C to meet the heat required for production and life, then the electronic device automatically changes the setting value of the fourth target temperature according to the specific temperature required in different time periods.

[0193] S1203: Circulate the water in the medium-temperature hot water tank to the plate heat exchanger through the plate heat exchanger circulation pump, and transport the water in the water tank to the plate heat exchanger through the water tank circulation pump; convert the water in the water tank to the fourth target temperature through the plate heat exchanger.

[0194] The plate heat exchanger is a highly efficient heat transfer device, which is mainly used to transfer heat from one medium to another medium. Based on the plate heat exchanger, the water in the water tank is heated by the water in the medium-temperature hot water tank. To ensure the feasibility of this method, the first target temperature preset in this application needs to be greater than the fourth target temperature preset.

[0195] The plate heat exchanger circulation pump refers to a circulation pump that circulates water from the medium-temperature hot water tank to the plate heat exchanger. The water tank circulation pump refers to a circulation pump that circulates water from the water tank to the plate heat exchanger. In order to save costs, in this application, both the circulation pump and the water tank circulation pump are selected as power frequency circulation pumps.

[0196] S1204: Determine that the fifth temperature of the water in the water tank has reached the fourth target temperature, and there is no need to start the plate replacement circulation pump and the water tank circulation pump.

[0197] In the embodiment of the present application, the process system also includes: a plate heat exchanger circulation pump, a plate heat exchanger, a water tank, a water tank circulation pump and a third temperature transmitter, and the third temperature transmitter is arranged inside the water tank; the electronic device obtains the fifth temperature measured by the third temperature transmitter; if the fifth temperature is less than the fourth target temperature of the preset water tank, the water in the medium-temperature hot water tank is circulated to the plate heat exchanger, and the water in the water tank is transported to the plate heat exchanger by the water tank circulation pump; the water in the water tank is converted to the fourth target temperature by the plate heat exchanger to achieve energy-saving control. Compared with the manual operation of heating the required water with an electric heating tube made of electric heating wire, it is convenient and fast and reduces energy consumption.

[0198] Embodiment 8:

[0199] In order to ensure the safe operation of the variable frequency circulation pump and the electric control valve during the actual control process, card edge control and anti-fool control are added to the electronic equipment control, so that the valve opening ratio of the electric control valve is within the preset limit of the electric control valve equipment; and the frequency of the variable frequency circulation pump is within the preset limit of the variable frequency circulation pump equipment.

[0200] Adding card edge control logic to the control logic programming, when the system performs automatic adjustment through the feedback adjustment mechanism, the opening ratio of the electric control valve is adjusted not to exceed the preset limit (target value). For example, the preset limit of the electric control valve device is 5% to 70%. In the logic with card edge control, the electronic device will not have a situation of less than 5% or greater than 70% when adjusting the electric control valve. In the logic without card edge control, the electronic device may have a moment of less than 5% or greater than 70% when adjusting the electric control valve, thereby reducing the control oscillation behavior existing in the control system during the control and adjustment process, and further reducing the occurrence of data fluctuations between the control value and the target value.

[0201] Adding card edge control logic to the control logic programming, when the system automatically adjusts the feedback adjustment mechanism, adjust the variable frequency circulation pump to the preset limit (target value), for example, the preset limit of the variable frequency circulation pump device is 10Hz to 50Hz, in the logic of adding card edge control, the electronic device will not be less than 10Hz or greater than 50Hz when adjusting the frequency of the variable frequency circulation pump. In the logic without adding card edge control, when the electronic device adjusts the frequency of the variable frequency circulation pump, it may be less than 10Hz or greater than 50Hz, thereby reducing the control oscillation behavior of the system control system in the process of control and adjustment, and further reducing the occurrence of data fluctuations between the control value and the target value.

[0202] Add anti-foolproof control to the electronic equipment control system. When the PLC control system is adjusting the opening ratio of the electric control valve or the operating frequency of the variable frequency circulation pump, if an erroneous instruction is issued, the anti-foolproof control of the electronic equipment control system will change the error value to the preset limit value to ensure the safe operation of the on-site equipment.

[0203] In an embodiment of the present application, card edge control and fool-proof control are added to the electronic equipment control system, so that the valve opening ratio of the electric regulating valve and the operating frequency of the variable frequency circulation pump are always within the preset limits of the equipment, which can not only ensure that the process requirements and the safe operation of the on-site equipment are met, but also reduce the occurrence of equipment failures, thereby avoiding the waste of human resources.

[0204] Embodiment 9:

[0205] In order to avoid the safety problems of bursting of process water pipes and idling of variable frequency circulation pumps that damage the motor, the embodiment of the present application also monitors the pressure measured by the pressure transmitter in the process system, and outputs alarm information to remind the operator that there is an abnormality in the water pipe on the current energy-consuming side, so as to timely discover and handle the abnormality, reduce equipment damage, and thus achieve energy saving. Specific method: Based on the preset pressure range, determine whether the first pressure exceeds the pressure range; if so, output an alarm and automatically stop the variable frequency circulation pump.

[0206] The preset pressure range can be set according to the material characteristics of the actual pipeline on site, or according to the pressure value required by the energy consumption system.

[0207] According to different detection situations, different alarm information is output and the electronic device executes the operation command. For example, when the first pressure is higher than the preset pressure range, the first sound and light alarm is used to output a high-pressure alarm and push the prompt information to the operator through the electronic device display interface. At the same time, the corresponding variable frequency circulation pump is shut down to ensure that the process pipeline will not burst due to overpressure. When the first pressure is lower than the preset pressure range, the second sound and light alarm is used to output a low-pressure alarm and push the prompt information to the operator through the electronic device display interface. At the same time, the corresponding variable frequency circulation pump is shut down to ensure that the water pump will not damage the motor due to idling. When the currently running variable frequency circulation pump fails, it automatically switches to the standby circulation pump to ensure the normal operation of the system.

[0208] In the embodiment of the present application, energy-saving control is achieved by monitoring the pressure measured by the pressure transmitter in the process system and setting the output of different alarm information and control methods. This solution not only prompts the operator that there is an abnormal situation in the water flow pipeline on the current energy-consuming side, but also promptly controls the stop of the variable frequency circulation pump, thereby reducing equipment damage and achieving energy-saving control.

[0209] Embodiment 10:

[0210] Fig.13 A detailed structural diagram of a process system provided in an embodiment of the present application.

[0211] Depend on Fig.13 It can be seen that the process system includes PLC and gateway. PLC is connected to the screw heat pump through communication / cable signals, and is connected to the circulating water pump through cable signals. PLC receives signals from the pressure transmitter and temperature transmitter installed in the pipeline, and receives signals from the temperature sensor or liquid level gauge in the medium-temperature hot water tank. PLC is connected to the control cabinet. Operators can send signals to PLC to control components such as screw heat pumps in the process system based on the control cabinet.

[0212] like Fig.14 It is a schematic diagram of the cable laying structure of a process system provided in an embodiment of the present application.

[0213] Depend on Fig.14 It can be seen that the process system is connected to the Siemens 1200PLC through the Siemens touch screen via the CAT5E network cable; the Siemens 1200PLC is connected to the pressure transmitter with RVVP 3*1.0 cable, the temperature transmitter with RVVP 3*1.0 cable, the industrial frequency circulation pump with KVV 6*1.0 cable, the variable frequency circulation pump with KVV 6*1.0+RVVP 4*1.0 cable, the screw heat pump with RVSP 2*1.0 cable, and the medium temperature water tank with RVVP 3*1.0*2 cable.

[0214] Among them, RVVP 3*1.0 means that the cable consists of 3 copper core conductors, each with a cross-sectional area of ​​1.0 square millimeter; KVV 6*1.0 means that the cable has 6 conductors, each with a cross-sectional area of ​​1.0 square millimeter; RVVP 4*1.0 means that the cable consists of 4 copper core conductors, each with a cross-sectional area of ​​1.0 square millimeter; RVSP 2*1.0 means a shielded twisted pair cable containing two conductors with a diameter of 1.0 mm; RVVP 3*1.0*2 means that the cable consists of 3 copper core conductors, each with a cross-sectional area of ​​1.0 square millimeter, and contains a total of 2 conductors.

[0215] like Fig.15 It is a schematic diagram of the on-site configuration structure of a process system provided in an embodiment of the present application.

[0216] Depend on Fig.15It can be seen that the process system in the embodiment of the present application includes a circulating water pump, a medium-temperature hot water tank, a temperature transmitter, a pressure transmitter, an electric regulating valve, a screw heat pump unit, a plate heat exchanger, and a water tank. On-site controlled equipment and quantity: 18 circulating water pumps, 3 heat pump units, 1 electric regulating valve, 1 air compressor waste heat return machine, 1 medium-temperature hot water tank, 1 dormitory water tank, 1 plate heat exchanger, etc. This application uses an air compressor for waste heat recovery + hot and cold full-effect screw heat pump to meet the needs of constant pressure in process production, constant temperature and humidity in air conditioning, and domestic water in dormitories. In order to meet the constant temperature and pressure supply demand of production process equipment, a medium-temperature hot water tank is set up, and the water in the medium-temperature hot water tank is heated by air compressor waste heat recovery and industrial frequency screw heat pump heating. That is, when the water in the medium-temperature hot water tank does not meet the set temperature, the system first starts the air compressor waste heat recovery machine to recover the heat to heat the water in the medium-temperature hot water tank. When the air compressor waste heat recovery machine has been running for a period of time, if the water temperature in the medium-temperature hot water tank still does not reach the preset temperature, the system will start the industrial frequency screw heat pump to heat the water in the medium-temperature hot water tank, so that the water temperature of the medium-temperature hot water tank is consistently maintained at the preset temperature; and when the water in the medium-temperature hot water tank is used to supply energy to the energy-consuming side (for example, the workshop air-conditioning system, the workshop process system), the system adjusts the corresponding variable frequency circulation pump through different production conditions and adds plate exchange to adjust the water in the water tank to the required temperature, so as to realize the reasonable and full utilization of energy and achieve maximum energy saving.

[0217] In an embodiment of the present application, the heat generated by the air compressor during operation is recovered through a waste heat recovery unit and converted into the heat energy required by the production side, which not only reduces the investment in cooling process equipment when the air compressor is working, but also reduces the cost of heating. The warm water heated by the industrial frequency screw heat pump and the warm water heated by the air compressor waste heat recovery unit are connected to the medium-temperature hot water tank, and then connected to the terminal process equipment or system through different water flow pipes. In addition, the air compressor waste heat recovery process is used preferentially to supply heat to the production side. When the air compressor waste heat recovery system cannot meet the hot water demand on the production side, the industrial frequency screw heat pump is started to continuously provide hot water to the production side to meet the heat and pressure requirements of the process equipment or system.

[0218] The control logic of the embodiment of the present application is: the electronic device first obtains the temperature detected by the temperature transmitter in the medium-temperature hot water tank. When the temperature does not meet the set temperature of 65°C, the electronic device first automatically starts the corresponding waste heat recovery circulation water pump, circulates the water in the medium-temperature hot water tank to the air compressor waste heat recovery machine, starts the air compressor waste heat recovery machine, and enables the heat recovered by the air compressor waste heat recovery machine to quickly heat the water flowing through the water pipe. After the air compressor waste heat recovery machine has been running for a period of time, the temperature of the water in the medium-temperature hot water tank still cannot meet the heating demand, and the electronic device automatically starts the industrial frequency screw heat pump and related host pumps and cold water pumps to meet the heat demand of the water in the medium-temperature hot water tank. The electronic device continuously determines whether the heat demand of the water in the medium-temperature hot water tank is met. If it still cannot be met after the set time, the system starts the second industrial frequency screw heat pump to heat the water in the medium-temperature hot water tank; by analogy, when the water temperature of the water in the medium-temperature hot water tank cannot be met, the number of industrial frequency screw heat pumps invested is increased.

[0219] Since the equipment is distributed over a wide area, two electronic devices can be used to systematically collect and control various equipment and sensors on site, including temperature transmitters, pressure transmitters, electric control valves, industrial frequency screw heat pumps, air compressor waste heat recovery machines, circulating water pumps, etc.

[0220] In addition, operators can use the HMI human-machine interface on the control cabinet to switch the manual mode of the circulating water pump, electric regulating valve, power frequency screw heat pump and other equipment on site, as well as start, stop, and control the target value, thereby realizing local group control. The central control room is equipped with a host computer SCADA system, and operators can use the SCADA system to achieve the same functions as HMI, and can view the temperature, pressure, liquid level and other data required for system operation in real time through HMI.

[0221] The method provided in the embodiment of the present application enables users to realize local centralized control, one-button start and stop of units, automatic addition and subtraction of units according to load, and feedback mechanism PID automatic adjustment to achieve constant pressure water supply requirements, so as to achieve better energy saving and consumption reduction.

[0222] The method provided by the embodiment of the present application greatly simplifies the operation process of the operator. The electric heating tube made of electric heating wire is used for heating control by a manual switch, and is upgraded to a unified heating control of an electronic device with a one-button start-stop operation, and the operator can also click the start button on the touch screen, and the system will follow the automatic start-stop sequence to automatically start the main pump and the power frequency screw heat pump and other equipment; on the energy consumption side, the system will automatically adjust the frequency of the variable frequency circulation pump according to the target pressure setting value to meet the terminal process conditions, and save electricity by adjusting the working frequency of the variable frequency circulation pump; when the water in the medium-temperature hot water tank reaches the preset temperature, the power frequency screw heat pump is stopped, and when the system detects that the power frequency screw heat pump stops running, the cold water pump stops running, and the water pump stops running to save electricity loss, and finally achieve the goal of energy saving and emission reduction and improving the work efficiency of workers.

[0223] The entire on-site system is in fully automatic control and unattended mode, which ensures the timely supply of heat and improves the work efficiency of workers on the process production line and the quality of products.

[0224] Table 1 shows the detailed energy saving information of the prior art solution and the solution of this application:

[0225]

[0226] Table 1

[0227] It can be seen from Table 1 that the heating method adopted in the prior art is traditional electric heating tube + air conditioning electric heating, and the heating method adopted in this application is air compressor waste heat recovery machine + screw hot and cold full-effect heat pump. The production power requirement of the prior art is 3200kW, and the production power requirement of this application is 410kW. The annual operating electricity cost of the prior art is about 5 million, and the annual operating electricity cost of this application is about 900,000. This application saves 7310160Kwh of electricity per year; saves 2924064 tons of standard coal per year; reduces carbon emissions by 6579144 tons per year; saves 4.1 million in electricity bills per year. The system characteristics of the prior art are high energy consumption and safety hazards, and the system characteristics of this application are safety, energy saving and intelligence.

[0228] Embodiment 11:

[0229] Based on the same application concept, the embodiment of the present application provides an apparatus for an energy-saving control method of a process system. Fig.16 For a schematic diagram of the device structure of an energy-saving control method for a process system provided in an embodiment of the present application, please refer to Fig.16 The process system includes: a medium-temperature hot water tank, a power frequency screw heat pump, a main engine pump, a first temperature transmitter and an electronic device, wherein the first temperature transmitter is arranged inside the medium-temperature hot water tank, the method is applied to the electronic device, and the device includes:

[0230] An acquisition module 1601 is used to acquire a first temperature measured by the first temperature transmitter;

[0231] A determination module 1602 is used to determine whether the first temperature is lower than a preset first target temperature;

[0232] Processing module 1603 is used to start the industrial frequency screw heat pump and the main engine pump if the first temperature is lower than the preset first target temperature; circulate the water in the medium-temperature hot water tank to the industrial frequency screw heat pump through the main engine pump, heat the water passing through the industrial frequency screw heat pump and circulate it to the medium-temperature hot water tank, so that the water in the medium-temperature hot water tank reaches the first target temperature.

[0233] Furthermore, the process system also includes: a cold water tank, a cold water pump, a cold water flow pipeline, and a non-contact infrared temperature detector, wherein the cold water pump is connected to the water flow pipeline on the water supply side of the cold water tank; the cold water flow pipeline is arranged on the outside of the pump of the industrial frequency screw heat pump; the non-contact infrared temperature detector is used to detect the second temperature of the industrial frequency screw heat pump in the operating state; the cold water pump and the non-contact infrared temperature detector are respectively connected to the electronic device; the acquisition module 1601 is also used to obtain the second temperature of the industrial frequency screw heat pump measured by the non-contact infrared temperature detector;

[0234] The judging module 1602 is further configured to judge whether the second temperature is greater than a preset second target temperature;

[0235] The processing module 1603 is also used to start the cold water pump if the second temperature is greater than the preset second target temperature; circulate the water in the cold water tank to the cold water flow pipe through the cold water pump, and the cold water flowing through the cold water flow pipe makes the second temperature lower than the preset second target temperature.

[0236] Further, the process system further includes: an electric regulating valve and a second temperature transmitter; the electric regulating valve is connected to the water flow pipe on the return side of the cold water tank; the second temperature transmitter is arranged inside the water flow pipe on the return side of the cold water tank; the electric regulating valve and the second temperature transmitter are respectively connected to electronic equipment, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature; the acquisition module 1601 is also used to obtain the third temperature measured by the second temperature transmitter;

[0237] The judging module 1602 is further configured to judge whether the third temperature is lower than a preset third target temperature;

[0238] The processing module 1603 is also used to determine a first target difference between the third temperature and the third target temperature if the third temperature is not less than a preset third target temperature; determine a target valve opening ratio corresponding to the first target difference based on a correspondence between the pre-saved difference and the valve opening ratio of the electric control valve, and adjust the electric control valve to the target valve opening ratio.

[0239] Furthermore, the process system also includes: an air compressor waste heat recovery machine and a waste heat recovery circulation pump, the air compressor waste heat recovery machine is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the waste heat recovery circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank, and is connected to the air compressor waste heat recovery machine; the air compressor waste heat recovery machine and the waste heat recovery circulation pump are respectively connected to electronic equipment, and before starting the industrial frequency screw heat pump and the main engine pump, the processing module 1603 is also used to control the air compressor waste heat recovery machine and the waste heat recovery circulation pump to start, and the water in the medium-temperature hot water tank is transported to the air compressor waste heat recovery machine through the waste heat recovery circulation pump, so that the air compressor waste heat recovery machine recovers the heat generated when the air compressor is working and heats the water in the medium-temperature hot water tank;

[0240] The acquisition module 1601 is further used to acquire a fourth temperature measured by the first temperature transmitter;

[0241] The judging module 1602 is further configured to judge whether the fourth temperature is lower than the first target temperature;

[0242] The processing module 1603 is further configured to start the industrial frequency screw heat pump and the host pump if the fourth temperature is lower than the first target temperature.

[0243] Further, the process system further includes: a pressure transmitter and a variable frequency circulation pump, the variable frequency circulation pump is connected to the water flow pipeline on the water supply side of the medium-temperature hot water tank and is connected to the energy system; the pressure transmitter is arranged inside the water flow pipeline connecting the corresponding variable frequency circulation pump and the energy system; the pressure transmitter and the variable frequency circulation pump are respectively connected to the electronic device, and the acquisition module 1601 is also used to obtain the first pressure measured by the pressure transmitter;

[0244] The processing module 1603 is also used to determine a second difference between the first pressure and a preset first target pressure; determine a target adjustment frequency corresponding to the second difference based on a correspondence between the preset difference and an adjustment frequency of the variable frequency circulation pump; determine a target operating frequency of the variable frequency circulation pump based on the target adjustment frequency; and control the operation of the variable frequency circulation pump based on the target operating frequency so that the pressure of the water flow in the water flow pipe where the pressure transmitter is located reaches the first target pressure.

[0245] Furthermore, the process system also includes: an industrial frequency circulation pump, which is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank, connected to the energy consumption system, and connected to the electronic equipment. The processing module 1603 is also used to start the industrial frequency circulation pump if the working frequency of the variable frequency circulation pump reaches a maximum value and the duration exceeds a preset time range, and the first pressure still does not reach the first target pressure, so that the pressure of the water flow in the water flow pipe where the pressure transmitter is located reaches the first target pressure.

[0246] Further, the process system also includes: a plate heat exchanger circulation pump, a plate heat exchanger, a water tank, a water tank circulation pump and a third temperature transmitter; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the plate heat exchanger circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the plate heat exchanger; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the water tank; the water tank circulation pump is connected to the water flow pipe on the water supply side of the water tank and is connected to the plate heat exchanger; the third temperature transmitter is arranged inside the water tank; the plate heat exchanger circulation pump, the plate heat exchanger, the water tank circulation pump and the third temperature transmitter are respectively connected to the electronic device, and the acquisition module 1601 is also used to obtain the fifth temperature measured by the third temperature transmitter;

[0247] The judging module 1602 is further configured to judge whether the fifth temperature is lower than a preset fourth target temperature;

[0248] The processing module 1603 is also used for circulating the water in the medium-temperature hot water tank to the plate heat exchanger through the plate heat exchanger circulation pump, and transporting the water in the water tank to the plate heat exchanger through the water tank circulation pump; if the fifth temperature is lower than the preset fourth target temperature, the water in the water tank is converted to the fourth target temperature through the plate heat exchanger.

[0249] Furthermore, the processing module 1603 is also used to add card edge control and anti-fool control to the electronic equipment control, so that the valve opening ratio of the electric regulating valve is within the preset limit of the electric regulating valve equipment; and the frequency of the variable frequency circulating pump is within the preset limit of the variable frequency circulating pump equipment.

[0250] Furthermore, the processing module 1603 is also used to determine whether the first pressure exceeds the pressure range based on a preset pressure range; if so, an alarm is output and the variable frequency circulation pump is automatically stopped.

[0251] Embodiment 12:

[0252] Based on the same application concept, an embodiment of the present application provides an electronic device, which can implement the steps of the energy-saving control method of the process system discussed above. Fig.17 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown in FIG. Fig.17 As shown, it includes: a processor 1701, a communication interface 1702, a memory 1703 and a communication bus 1704, wherein the processor 1701, the communication interface 1702, and the memory 1703 communicate with each other through the communication bus 1704;

[0253] The memory 1703 stores a computer program. When the program is executed by the processor 1701, the processor 1701 performs the following steps:

[0254] The process system comprises: a medium-temperature hot water tank, an industrial frequency screw heat pump, a host pump, a first temperature transmitter and electronic equipment, wherein the first temperature transmitter is arranged inside the medium-temperature hot water tank, and the method is applied to the electronic equipment, and the method comprises:

[0255] Obtaining a first temperature measured by the first temperature transmitter;

[0256] Determine whether the first temperature is lower than a preset first target temperature; if so, start the industrial frequency screw heat pump and the main engine pump; circulate the water in the medium-temperature hot water tank to the industrial frequency screw heat pump through the main engine pump, heat the water passing through the industrial frequency screw heat pump and circulate it to the medium-temperature hot water tank, so that the water in the medium-temperature hot water tank reaches the first target temperature.

[0257] Furthermore, the process system further comprises: a cold water tank, a cold water pump, a cold water flow pipeline, and a non-contact infrared temperature detector, wherein the cold water pump is connected to the flow pipeline on the water supply side of the cold water tank; the cold water flow pipeline is arranged outside the pump of the industrial frequency screw heat pump; the non-contact infrared temperature detector is used to detect the second temperature of the industrial frequency screw heat pump in the operating state; the cold water pump and the non-contact infrared temperature detector are respectively connected to electronic equipment, and the method further comprises:

[0258] Acquiring a second temperature of the industrial frequency screw heat pump measured by the non-contact infrared temperature detector;

[0259] Determine whether the second temperature is greater than a preset second target temperature; if so, start the cold water pump; circulate the water from the cold water tank to the cold water flow pipe through the cold water pump, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature.

[0260] Furthermore, the process system further includes: an electric regulating valve and a second temperature transmitter; the electric regulating valve is connected to the water flow pipe on the return side of the cold water tank; the second temperature transmitter is arranged inside the water flow pipe on the return side of the cold water tank; the electric regulating valve and the second temperature transmitter are respectively connected to electronic equipment, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature, and the method further includes:

[0261] Acquire a third temperature measured by the second temperature transmitter;

[0262] Determine whether the third temperature is less than a preset third target temperature; if not, determine a first target difference between the third temperature and the third target temperature; based on the correspondence between the pre-saved difference and the valve opening ratio of the electric control valve, determine the target valve opening ratio corresponding to the first target difference, and adjust the electric control valve to the target valve opening ratio.

[0263] Furthermore, the process system further includes: an air compressor waste heat recovery machine and a waste heat recovery circulation pump, the air compressor waste heat recovery machine is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the waste heat recovery circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the air compressor waste heat recovery machine; the air compressor waste heat recovery machine and the waste heat recovery circulation pump are respectively connected to electronic equipment, and before starting the industrial frequency screw heat pump and the host pump, the method further includes:

[0264] Control the air compressor waste heat recovery machine and the waste heat recovery circulation pump to start, and transport the water in the medium-temperature hot water tank to the air compressor waste heat recovery machine through the waste heat recovery circulation pump, so that the air compressor waste heat recovery machine recovers the heat generated when the air compressor is working and heats the water in the medium-temperature hot water tank;

[0265] The fourth temperature measured by the first temperature transmitter is obtained, and it is determined whether the fourth temperature is less than the first target temperature. If so, the industrial frequency screw heat pump and the host pump are started.

[0266] Furthermore, the process system further comprises: a pressure transmitter and a variable frequency circulation pump, wherein the variable frequency circulation pump is connected to the water flow pipeline on the water supply side of the medium temperature hot water tank and is connected to the energy system; the pressure transmitter is arranged inside the water flow pipeline where the corresponding variable frequency circulation pump is connected to the energy system; the pressure transmitter and the variable frequency circulation pump are respectively connected to the electronic equipment, and the method further comprises:

[0267] Acquire a first pressure measured by the pressure transmitter, and determine a second difference between the first pressure and a preset first target pressure;

[0268] According to the correspondence between the preset difference and the adjustment frequency of the variable frequency circulation pump, the target adjustment frequency corresponding to the second difference is determined; according to the target adjustment frequency, the target operating frequency of the variable frequency circulation pump is determined; according to the target operating frequency, the operation of the variable frequency circulation pump is controlled so that the pressure of the water flow in the water flow pipeline where the pressure transmitter is located reaches the first target pressure.

[0269] Furthermore, the process system further comprises: a power frequency circulation pump, which is connected to a water flow pipeline on the water supply side of the medium temperature hot water tank, connected to an energy system, and connected to an electronic device. The method further comprises:

[0270] If the operating frequency of the variable frequency circulation pump reaches the maximum value and lasts for more than a preset time range, and the first pressure still does not reach the first target pressure, the industrial frequency circulation pump is started to make the pressure of the water flow in the water flow pipe where the pressure transmitter is located reach the first target pressure.

[0271] Further, the process system also includes: a plate heat exchanger circulation pump, a plate heat exchanger, a water tank, a water tank circulation pump and a third temperature transmitter; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the plate heat exchanger circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the plate heat exchanger; the plate heat exchanger is connected to the water flow pipes on the water supply side and the return side of the water tank; the water tank circulation pump is connected to the water flow pipe on the water supply side of the water tank and is connected to the plate heat exchanger; the third temperature transmitter is arranged inside the water tank; the plate heat exchanger circulation pump, the plate heat exchanger, the water tank circulation pump, and the third temperature transmitter are respectively connected to electronic equipment, and the method also includes:

[0272] Acquiring a fifth temperature measured by the third temperature transmitter;

[0273] Determine whether the fifth temperature is lower than the preset fourth target temperature; if so, circulate the water in the medium-temperature hot water tank to the plate heat exchanger through the plate heat exchanger circulation pump, and transport the water in the water tank to the plate heat exchanger through the water tank circulation pump; convert the water in the water tank to the fourth target temperature through the plate heat exchanger.

[0274] Furthermore, the method further comprises:

[0275] By adding card edge control and foolproof control to the electronic equipment control, the opening ratio of the electric regulating valve is within the preset limit of the electric regulating valve device; the frequency of the variable frequency circulating pump is within the preset limit of the variable frequency circulating pump device.

[0276] Furthermore, the method further comprises:

[0277] Based on a preset pressure range, it is determined whether the first pressure exceeds the pressure range; if so, an alarm is output and the variable frequency circulation pump is automatically stopped.

[0278] The communication bus mentioned in the above electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The communication interface 1702 is used for communication between the above electronic device and other devices. The memory may include a random access memory (RAM) and may also include a non-volatile memory (NVM), such as at least one disk storage. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0279] The above-mentioned processor can be a general-purpose processor, including a central processing unit, a network processor (Network Processor, NP), etc.; it can also be a digital signal processing processor (Digital Signal Processing, DSP), an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc.

[0280] Embodiment 13:

[0281] Based on the same application concept, the embodiment of the present application provides a computer-readable storage medium, in which a computer program executable by a processor is stored. When the program runs on the processor, the processor executes any of the energy-saving control methods for process systems discussed above. Since the principle of solving the problem by the above-mentioned computer-readable storage medium is similar to that of the energy-saving control method for the process system, the implementation of the above-mentioned computer-readable storage medium can refer to the implementation of the method, and the repeated parts will not be repeated.

[0282] Based on the same application concept, the embodiment of the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes any of the energy-saving control methods for process systems discussed above. Since the principle of solving the problem by the above computer program product is similar to the energy-saving control method for the process system, the implementation of the above computer program product can refer to the implementation of the method, and the repeated parts will not be repeated.

[0283] The above-mentioned computer-readable storage medium can be any available medium or data storage device that can be accessed by the processor in the electronic device, including but not limited to magnetic storage such as floppy disks, hard disks, magnetic tapes, MO (magneto-optical disks), etc., optical storage such as CD, DVD, BD, HVD, etc., and semiconductor storage such as ROM, EPROM, EEPROM, NAND FLASH (non-volatile memory), SSD (solid state drive), etc.

[0284] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0285] The computer program for performing the operation of the present disclosure may be an assembly instruction, an instruction set architecture (ISA) instruction, a machine instruction, a machine-related instruction, a microcode, a firmware instruction, a state setting data, or a source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be personalized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0286] The computer program product described herein may be implemented in hardware, software, or a combination thereof. In one optional embodiment, the computer program product is embodied as a computer storage medium, and in another optional embodiment, the computer program product is embodied as a software product, such as a software development kit (SDK), etc.

[0287] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete application embodiment, or an embodiment in combination with application and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0288] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0289] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0290] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0291] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0292] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for energy-saving control of a process system, characterized in that: The process system comprises: a medium-temperature hot water tank, an industrial frequency screw heat pump, a host pump, a first temperature transmitter and electronic equipment, wherein the first temperature transmitter is arranged inside the medium-temperature hot water tank, and the method is applied to the electronic equipment, and the method comprises: Obtaining a first temperature measured by the first temperature transmitter; Determine whether the first temperature is lower than a preset first target temperature; if so, start the industrial frequency screw heat pump and the main engine pump; circulate the water in the medium-temperature hot water tank to the industrial frequency screw heat pump through the main engine pump, heat the water passing through the industrial frequency screw heat pump and circulate it to the medium-temperature hot water tank, so that the water in the medium-temperature hot water tank reaches the first target temperature.

2. The method according to claim 1, characterized in that The process system further includes: a cold water tank, a cold water pump, a cold water flow pipeline, and a non-contact infrared temperature detector. The cold water pump is connected to the water flow pipeline on the water supply side of the cold water tank; the cold water flow pipeline is arranged outside the pump of the power frequency screw heat pump; the non-contact infrared temperature detector is used to detect the second temperature of the power frequency screw heat pump in the running state; the cold water pump and the non-contact infrared temperature detector are respectively connected to the electronic equipment. The method further includes: Acquiring a second temperature of the industrial frequency screw heat pump measured by the non-contact infrared temperature detector; Determine whether the second temperature is greater than a preset second target temperature; if so, start the cold water pump; circulate the water from the cold water tank to the cold water flow pipe through the cold water pump, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature.

3. The method according to claim 2, characterized in that The process system further includes: an electric regulating valve and a second temperature transmitter; the electric regulating valve is connected to the water flow pipe on the return side of the cold water tank; the second temperature transmitter is arranged inside the water flow pipe on the return side of the cold water tank; the electric regulating valve and the second temperature transmitter are respectively connected to electronic equipment, and the cold water flowing through the cold water flow pipe makes the second temperature less than the preset second target temperature, and the method further includes: Acquire a third temperature measured by the second temperature transmitter; Determine whether the third temperature is less than a preset third target temperature; if not, determine a first target difference between the third temperature and the third target temperature; based on the correspondence between the pre-saved difference and the valve opening ratio of the electric control valve, determine the target valve opening ratio corresponding to the first target difference, and adjust the electric control valve to the target valve opening ratio.

4. The method according to claim 1, characterized in that: The process system further includes: an air compressor waste heat recovery machine and a waste heat recovery circulation pump, the air compressor waste heat recovery machine is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the waste heat recovery circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the air compressor waste heat recovery machine; the air compressor waste heat recovery machine and the waste heat recovery circulation pump are respectively connected to electronic equipment, and before starting the industrial frequency screw heat pump and the host pump, the method further includes: Control the air compressor waste heat recovery machine and the waste heat recovery circulation pump to start, and transport the water in the medium-temperature hot water tank to the air compressor waste heat recovery machine through the waste heat recovery circulation pump, so that the air compressor waste heat recovery machine recovers the heat generated when the air compressor is working and heats the water in the medium-temperature hot water tank; The fourth temperature measured by the first temperature transmitter is obtained, and it is determined whether the fourth temperature is less than the first target temperature. If so, the industrial frequency screw heat pump and the host pump are started.

5. The method according to claim 1, characterized in that The process system further includes: a pressure transmitter and a variable frequency circulation pump, wherein the variable frequency circulation pump is connected to the water flow pipeline on the water supply side of the medium-temperature hot water tank and is connected to the energy system; the pressure transmitter is arranged inside the water flow pipeline where the corresponding variable frequency circulation pump is connected to the energy system; the pressure transmitter and the variable frequency circulation pump are respectively connected to the electronic equipment, and the method further includes: Acquire a first pressure measured by the pressure transmitter, and determine a second difference between the first pressure and a preset first target pressure; According to the correspondence between the preset difference and the adjustment frequency of the variable frequency circulation pump, the target adjustment frequency corresponding to the second difference is determined; according to the target adjustment frequency, the target operating frequency of the variable frequency circulation pump is determined; according to the target operating frequency, the operation of the variable frequency circulation pump is controlled so that the pressure of the water flow in the water flow pipeline where the pressure transmitter is located reaches the first target pressure.

6. The method according to claim 5, characterized in that The process system further includes: a power frequency circulation pump, which is connected to a water flow pipeline on the water supply side of the medium-temperature hot water tank, connected to an energy system, and connected to an electronic device. The method further includes: If the operating frequency of the variable frequency circulation pump reaches the maximum value and lasts for more than a preset time range, and the first pressure still does not reach the first target pressure, the industrial frequency circulation pump is started to make the pressure of the water flow in the water flow pipe where the pressure transmitter is located reach the first target pressure.

7. The method according to claim 1, characterized in that The process system also includes: a plate exchanger circulation pump, a plate exchanger, a water tank, a water tank circulation pump and a third temperature transmitter; the plate exchanger is connected to the water flow pipes on the water supply side and the return side of the medium-temperature hot water tank; the plate exchanger circulation pump is connected to the water flow pipe on the water supply side of the medium-temperature hot water tank and is connected to the plate exchanger; the plate exchanger is connected to the water flow pipes on the water supply side and the return side of the water tank; the water tank circulation pump is connected to the water flow pipe on the water supply side of the water tank and is connected to the plate exchanger; the third temperature transmitter is arranged inside the water tank; the plate exchanger circulation pump, the plate exchanger, the water tank circulation pump, and the third temperature transmitter are respectively connected to electronic equipment, and the method also includes: Acquiring a fifth temperature measured by the third temperature transmitter; Determine whether the fifth temperature is lower than the preset fourth target temperature; if so, circulate the water in the medium-temperature hot water tank to the plate heat exchanger through the plate heat exchanger circulation pump, and transport the water in the water tank to the plate heat exchanger through the water tank circulation pump; convert the water in the water tank to the fourth target temperature through the plate heat exchanger.

8. The method according to claim 3 or 5, characterized in that: The method further comprises: By adding card edge control and foolproof control to the electronic equipment control, the opening ratio of the electric regulating valve is within the preset limit of the electric regulating valve device; the frequency of the variable frequency circulating pump is within the preset limit of the variable frequency circulating pump device.

9. The method according to claim 5, characterized in that The method further comprises: Based on a preset pressure range, it is determined whether the first pressure exceeds the pressure range; if so, an alarm is output and the variable frequency circulation pump is automatically stopped.

10. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, for implementing the method according to any one of claims 1 to 9 when executing a program stored in a memory.

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