Refined intelligent control method for fan set of solid-state electric heat storage device

Abstract

According to the fine intelligent control method for the fan set of the solid-state electric heat storage device, the limit temperature is set according to the heating condition of a heating area and the weather condition, the outdoor environment temperature is collected, whether the outdoor environment temperature is higher than the limit temperature or not is judged, and a corresponding fan control strategy is selected according to the judgment result; after a corresponding fan control strategy is selected, the water temperature of the pipe network is monitored, a fan is automatically started or stopped or the frequency of the fan is adjusted according to a monitoring result, and it is guaranteed that the water temperature of the pipe network reaches a preset value; by means of the method, automatic adjustment of the fans of the solid-state electric heat storage device can be achieved, the personnel operation cost is reduced, and meanwhile energy waste caused by the fact that the outdoor temperature is high and all the fans operate in the heating period is avoided.

Description

Technical Field

[0001] The present invention relates to the field of solid-state heat storage, and in particular to a refined intelligent control method for a fan unit of a solid-state electric heat storage device. Background Art

[0002] The solid electric heat storage device is a new type of electric heat storage system. The system can utilize off-peak electricity, abandoned wind, abandoned solar power, and abandoned water to convert effective energy into solid thermal energy and store the energy in the equipment. It stops supplying power during peak power supply periods and continuously releases the stored thermal energy evenly to the heating system or domestic hot water system. Solid heat storage utilizes the characteristics of the solid form of the material, such as high melting point, high density, and fast thermal conductivity.

[0003] Solid-state electric heat storage devices are mostly designed based on the cold weather in heating areas in December and January. At this time, all the circulating fans arranged must be running to meet the heating needs. The circulating fans and inverters will generate heat and lose control when running below 5Hz, so the operating range of the circulating fans is mostly between 5-50Hz; however, at the beginning and end of the heating period, the outdoor temperature is usually high. Even if the circulating fan units are all running at 5Hz, the water temperature in the pipeline network will remain high, which not only wastes energy but also fails to provide users with a comfortable heating experience. Therefore, all circulating fan units cannot be put into use; if the fan is manually started and stopped according to the actual heating situation, although it can meet the requirements of rational use of thermal energy, it will increase personnel operating costs. If misoperation occurs, the heat storage body will release heat unevenly. Summary of the invention

[0004] In order to solve the problems in the prior art that all the circulation fans in a solid-state electric heat storage device are fully operated, resulting in energy waste and poor heating experience, and human intervention increases personnel operating costs, a refined intelligent control method for the fan group of a solid-state electric heat storage device is proposed.

[0005] A refined intelligent control method for a fan unit of a solid-state electric heat storage device, comprising:

[0006] Step 1: Collect the outdoor ambient temperature and determine whether the outdoor ambient temperature is higher than the limit temperature. If yes, proceed to step 2; otherwise, proceed to step 5.

[0007] Step 2: Obtain the water temperature of the pipe network and determine whether the water temperature of the pipe network is less than the target value. If so, proceed to step 3; otherwise, proceed to step 4;

[0008] Step 3: Divide the heat storage body into multiple areas, each heat storage body area corresponds to a fan, determine the fan start-up sequence corresponding to the heat storage body area according to the temperature of the heat storage body area, obtain the state of each fan in turn according to the fan start-up sequence, and turn on the fan or increase the fan frequency according to the obtained fan state after each fan state is obtained; after determining the fan start-up sequence, continue to obtain the pipe network water temperature and determine whether the pipe network water temperature reaches the target value; until all fans are turned on and the frequency of the last turned-on fan reaches f max Or when the water temperature in the pipe network reaches the target value, stop turning on the fan or increase the fan frequency;

[0009] Step 4: Divide the heat storage body into multiple areas, each heat storage body area corresponds to a fan, determine the fan shutdown order corresponding to the heat storage body area according to the temperature of the heat storage body area, obtain each fan state in turn according to the fan shutdown order, and shut down the fan or reduce the fan frequency according to the obtained fan state after each fan state is obtained. After determining the fan shutdown order, continue to obtain the pipe network water temperature and determine whether the pipe network water temperature is lower than the target value; stop shutting down the fan or reducing the fan frequency until all fans are shut down or the pipe network water temperature is lower than the target value;

[0010] Step 5: Divide the thermal storage body into multiple areas. Each thermal storage body area corresponds to a fan. Get the status of the fan corresponding to each thermal storage body area. If the fan is in the off state, turn on the fan and set the fan frequency to f min , if the fan is on, get the fan frequency f 3 ; Turn on the fan or get the fan frequency f 3 After each interval time t 3 Increase the frequency of each fan by Δf. If there is a fan frequency that reaches f after increasing by Δf, max Then stop changing the fan frequency until all fan frequencies reach f max When the fan is stopped or the fan frequency is increased; while obtaining the status of the fan corresponding to each heat storage area, the water temperature of the pipe network is continuously obtained, and it is determined whether the water temperature of the pipe network reaches the target value. If so, the fan is stopped or the fan frequency is increased.

[0011] Beneficial Effects

[0012] A refined intelligent control method for the fan group of a high-efficiency solid-state electric heat storage device sets a limit temperature according to the heating situation and weather conditions in the heating area, collects the outdoor ambient temperature and determines whether the outdoor ambient temperature is higher than the limit temperature, and selects a corresponding fan control strategy based on the judgment result; after selecting the corresponding fan control strategy, the water temperature of the pipeline network is monitored, and the fan is automatically turned on, off or the fan frequency is adjusted according to the monitoring result to ensure that the water temperature of the pipeline network reaches a preset value; this method can realize automatic adjustment of the fan of the solid-state electric heat storage device, reduce personnel operating costs, and avoid energy waste caused by the operation of multiple fans during the heating period due to high outdoor temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a flow chart of the refined intelligent control method of the fan unit of the high-efficiency solid-state electric heat storage device of this embodiment;

[0014] Figure 2 is a solid-state electric heat storage device of this embodiment;

[0015] Among them, 1 is the fan; 2 is the air inlet duct; 3 is the insulation frame; 4 is the heat storage body; 5 is the heater; 6 is the air outlet duct; 7 is the heat exchanger; and 8 is the heating pipe. DETAILED DESCRIPTION

[0016] The following will be combined Figures 1 to 2 , describing this embodiment, a refined intelligent control method for a fan unit of a solid-state electric heat storage device, comprising:

[0017] Step 1: Collect the outdoor ambient temperature and determine whether the outdoor ambient temperature is higher than the limit temperature. If yes, proceed to step 2; otherwise, proceed to step 5.

[0018] Step 2: Obtain the water temperature of the pipe network and determine whether the water temperature of the pipe network is less than the target value. If so, proceed to step 3; otherwise, proceed to step 4;

[0019] Step 3: Divide the heat storage body into multiple areas, each heat storage body area corresponds to a fan, determine the fan start-up sequence corresponding to the heat storage body area according to the temperature of the heat storage body area, obtain the state of each fan in turn according to the fan start-up sequence, and turn on the fan or increase the fan frequency according to the obtained fan state after each fan state is obtained; after determining the fan start-up sequence, continue to obtain the pipe network water temperature and determine whether the pipe network water temperature reaches the target value; until all fans are turned on and the frequency of the last turned-on fan reaches f max Or when the water temperature in the pipe network reaches the target value, stop turning on the fan or increase the fan frequency;

[0020] Step 4: Divide the heat storage body into multiple areas, each heat storage body area corresponds to a fan, determine the fan shutdown order corresponding to the heat storage body area according to the temperature of the heat storage body area, obtain each fan state in turn according to the fan shutdown order, and shut down the fan or reduce the fan frequency according to the obtained fan state after each fan state is obtained. After determining the fan shutdown order, continue to obtain the pipe network water temperature and determine whether the pipe network water temperature is lower than the target value; stop shutting down the fan or reducing the fan frequency until all fans are shut down or the pipe network water temperature is lower than the target value;

[0021] Step 5: Divide the thermal storage body into multiple areas. Each thermal storage body area corresponds to a fan. Get the status of the fan corresponding to each thermal storage body area. If the fan is in the off state, turn on the fan and set the fan frequency to f min , if the fan is on, get the fan frequency f 3 ; Turn on the fan or get the fan frequency f 3 After each interval time t 3 Increase the frequency of each fan by Δf. If there is a fan frequency that reaches f after increasing by Δf, max Then stop changing the fan frequency until all fan frequencies reach f max When the fan is stopped or the fan frequency is increased; while obtaining the status of the fan corresponding to each heat storage area, the water temperature of the pipe network is continuously obtained, and it is determined whether the water temperature of the pipe network reaches the target value. If so, the fan is stopped or the fan frequency is increased.

[0022] Specifically, Figure 2 As shown, the heat storage body 4 in the solid-state electric heat storage device is divided into four areas, each heat storage body area includes a fan 1, the fan outlet is connected to the air inlet duct 2, the heat storage body area corresponding to the fan, the air outlet duct 6, the heat exchanger 7 and the heating pipe 8 in sequence; the fan 1 transmits the wind to the corresponding heat storage body area through the air inlet duct 2, and the corresponding heat storage body area transmits the heated wind from the air outlet duct 6 to the heat exchanger 7, the heated wind heats the water in the heat exchanger 7, and the heated water is transmitted to the heating pipe 8, the heating pipe 8 is connected to the household pipe network, and the insulation frame 3 insulates the heat storage body; the high-efficiency solid-state electric heat storage device fan group refined intelligent control method of the present application sets the limit temperature according to the heating situation and weather conditions in the heating area, collects the outdoor ambient temperature and determines whether the outdoor ambient temperature is higher than the limit temperature, selects the corresponding fan control strategy according to the judgment result, and then automatically turns on, turns off or adjusts the fan frequency according to the corresponding fan control strategy to finally achieve the purpose of regulating the water temperature of the pipe network.

[0023] Furthermore, in step 3, the method for determining the start-up order of the fans is as follows: obtaining the temperature of each thermal storage area, sorting the multiple thermal storage areas from high to low according to the temperature of each thermal storage area, and using the sorting result of the thermal storage areas as the start-up order of the fans corresponding to each thermal storage area. Specifically, the fans corresponding to the areas with high thermal storage temperatures are started first, and the areas with high thermal storage temperatures have sufficient heat, so they are started first to release heat to the outside, which can keep the temperatures of the various areas of the thermal storage relatively balanced.

[0024] Further, in step 3, after obtaining the status of each fan, the method of starting the fan or increasing the fan frequency according to the obtained status of the fan is:

[0025] Get the status of the fan. If the fan is in the starting state, get the fan frequency f 1 , and every time interval t 1 Increase the fan frequency by Δf until the fan frequency is greater than f max Then, the status of the next fan is obtained according to the fan startup sequence; if the fan is in the off state, the fan is started and the initial frequency of the fan is set to f min , and every time interval t 1 Increase the fan frequency by Δf until the fan frequency is greater than f max Then obtain the status of the next fan according to the fan startup sequence.

[0026] Specifically, the fan frequency can be adjusted in the interval time period t 1 A continuous adjustment method is adopted inside. The control system collects the water temperature of the pipeline network in real time, compares it with the target value, and continuously increases the fan frequency. The fan frequency is continuously and automatically adjusted according to the speed of change of the water temperature of the pipeline network and the distance from the target value.

[0027] Furthermore, in step four, the method for determining the fan shutdown order is: obtaining the temperature of each heat storage area, sorting the multiple heat storage areas from low to high according to the temperature of each heat storage area, and using the heat storage area sorting result as the fan shutdown order corresponding to each heat storage area.

[0028] Specifically, the fans corresponding to the areas with low temperatures of the heat storage body are turned off first, and the areas with low temperatures of the heat storage body do not have sufficient heat, so the heat release is stopped first, thereby maintaining a relatively balanced temperature in each area of ​​the heat storage body.

[0029] Further, in step 4, after obtaining the status of each fan, the method of shutting down the fan or reducing the fan frequency according to the obtained status of the fan is:

[0030] Get the fan status. If the fan is off, get the status of the next fan in the order of fan off. If the fan is on, get the fan frequency f. 2 , and every time interval t 2Reduce the fan frequency by Δf until the fan frequency is less than f min The fan is turned off at the same time, and after the fan is turned off, the status of the next fan is obtained according to the fan shutdown sequence.

[0031] Furthermore, the opening interval of every two adjacent fans is 20 to 30 minutes; the closing interval of every two adjacent fans is 10 to 15 minutes. Specifically, the opening interval and closing interval can be adjusted according to the actual situation of the project; the next fan can only be started after the previous fan is running smoothly. The next fan can only be stopped after the previous fan is stopped and the wind field in the thermal storage body is stable.

[0032] Furthermore, f min is 5Hz, f max is 50Hz, f 3 In f min to f max Within the range; t 3 In the range of 0 seconds to 10 seconds. Specifically, set the fan frequency f min and f max To ensure the normal operation of the fan.

[0033] Furthermore, Δf is in the range of 3 Hz to 10 Hz; f 1 and f 2 Both in f min to f max Within the range; t 1 and t 2 All are in the range of 0 to 10 seconds.

[0034] Furthermore, a method for refined intelligent control of a fan group of a solid-state electric heat storage device also includes continuously obtaining the difference between the water temperature of the pipeline network and the target value after starting step three, step four or step five, and judging whether the difference reaches a warning value, and if so, issuing a temperature warning.

[0035] Specifically, the target value is set according to the heating situation and weather conditions in the heating area. When the difference between the water temperature in the pipeline network and the target value is too large, the heating effect will be affected.

[0036] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A refined intelligent control method for a fan unit of a solid-state electric heat storage device, characterized in that: include: Step 1: Collect the outdoor ambient temperature and determine whether the outdoor ambient temperature is higher than the limit temperature. If yes, proceed to step 2; otherwise, proceed to step 5. Step 2: Obtain the water temperature of the pipe network and determine whether the water temperature of the pipe network is less than the target value. If so, proceed to step 3; otherwise, proceed to step 4; Step 3: Divide the heat storage body into multiple areas, each heat storage body area corresponds to a fan, determine the fan start-up sequence corresponding to the heat storage body area according to the temperature of the heat storage body area, obtain the state of each fan in turn according to the fan start-up sequence, and turn on the fan or increase the fan frequency according to the obtained fan state after each fan state is obtained; after determining the fan start-up sequence, continue to obtain the pipe network water temperature and determine whether the pipe network water temperature reaches the target value; until all fans are turned on and the frequency of the last turned-on fan reaches f max Or when the water temperature in the pipe network reaches the target value, stop turning on the fan or increase the fan frequency; Step 4: Divide the heat storage body into multiple areas, each heat storage body area corresponds to a fan, determine the fan shutdown order corresponding to the heat storage body area according to the temperature of the heat storage body area, obtain each fan state in turn according to the fan shutdown order, and after obtaining each fan state, shut down the fan or reduce the fan frequency according to the obtained fan state. After determining the fan shutdown order, continue to obtain the pipe network water temperature and judge whether the pipe network water temperature is lower than the target value; stop shutting down the fan or reducing the fan frequency until all fans are shut down or the pipe network water temperature is lower than the target value, and end; Step 5: Divide the thermal storage body into multiple areas. Each thermal storage body area corresponds to a fan. Get the status of the fan corresponding to each thermal storage body area. If the fan is in the off state, turn on the fan and set the fan frequency to f min , if the fan is on, obtain the fan frequency f3; after turning on the fan or obtaining the fan frequency f3, increase the frequency of each fan by Δf every time interval t3. If there is a fan frequency increase of Δf to reach f max Then stop changing the fan frequency until all fan frequencies reach f max After obtaining the status of the fan corresponding to each heat storage area, the water temperature of the pipe network is continuously obtained, and it is determined whether the water temperature of the pipe network reaches the target value. If so, the fan is stopped or the fan frequency is increased.

2. According to claim 1, a refined intelligent control method for a fan unit of a solid-state electric heat storage device is characterized in that: In step three, the method for determining the start-up order of the fans corresponding to the heat storage area according to the temperature of the heat storage area is: obtaining the temperature of each heat storage area, sorting the multiple heat storage areas from high to low according to the temperature of each heat storage area, and using the sorting results of the heat storage areas as the start-up order of the fans corresponding to each heat storage area.

3. A refined intelligent control method for a fan unit of a solid-state electric heat storage device according to claim 2, characterized in that: In step 3, after obtaining the status of each fan, the method of starting the fan or increasing the fan frequency according to the obtained status of the fan is: Get the status of the fan. If the fan is in the starting state, get the fan frequency f1, and increase the fan frequency by Δf every time interval t1 until the fan frequency is greater than f max Then, the status of the next fan is obtained according to the fan startup sequence; if the fan is in the off state, the fan is started and the initial frequency of the fan is set to f min , and increase the fan frequency by Δf at each interval t1 until the fan frequency is greater than f max Then obtain the status of the next fan according to the fan startup sequence.

4. A refined intelligent control method for a fan unit of a solid-state electric heat storage device according to claim 1, characterized in that: In step 4, the method for determining the fan shutdown order corresponding to the heat storage area according to the temperature of the heat storage area is: obtain the temperature of each heat storage area, sort the multiple heat storage areas from low to high according to the temperature of each heat storage area, and use the heat storage area sorting result as the fan shutdown order corresponding to each heat storage area.

5. A refined intelligent control method for a fan unit of a solid-state electric heat storage device according to claim 4, characterized in that: In step 4, after obtaining the status of each fan, the method of shutting down the fan or reducing the fan frequency according to the obtained status of the fan is as follows: Get the fan status. If the fan is off, get the status of the next fan in the order of fan off. If the fan is on, get the fan frequency f2 and reduce the fan frequency by Δf every time interval t2 until the fan frequency is less than f. min The fan is turned off at the same time, and after the fan is turned off, the status of the next fan is obtained according to the fan shutdown sequence.

6. A refined intelligent control method for a fan unit of a solid-state electric heat storage device according to claim 1, characterized in that: The interval between every two adjacent fans that are turned on is 20 to 30 minutes; the interval between every two adjacent fans that are turned off is 10 to 15 minutes.

7. A refined intelligent control method for a fan unit of a solid-state electric heat storage device according to claim 1, characterized in that: f min is 5Hz, f max is 50Hz, f3 is at f min to f max within the range.

8. A refined intelligent control method for a fan unit of a solid-state electric heat storage device according to claim 3 or 5, characterized in that: Δf is in the range of 3Hz to 10Hz; f1 and f2 are both in f min to f max within the range.

9. The method for refined intelligent control of a fan unit of a solid-state electric heat storage device according to claim 1, characterized in that: Also includes, After step 3, step 4 or step 5 starts, the difference between the water temperature of the pipe network and the target value is continuously obtained and it is determined whether the difference reaches the warning value. If so, a temperature warning is issued.

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