Control method, device and apparatus for heating furnace blower

Abstract

The application discloses a control method, device and equipment of a heating furnace blower, and the method comprises the following steps: obtaining a target air volume of a heating furnace, determining a target reference frequency and a target inlet valve opening degree of the blower according to a target air volume interval corresponding to the target air volume, wherein the target reference frequency and the target inlet valve opening degree are positively correlated with the target air volume interval; obtaining an actual air pressure value of the blower and a deviation between the actual air pressure value and a preset target air pressure value; and adjusting the target reference frequency and the target inlet valve opening degree according to the deviation until the deviation between the actual air pressure value and the preset target air pressure value is less than or equal to a first threshold value. The application can make the blower frequency and the inlet valve opening degree follow the air volume demand of the heating furnace, thereby reducing the power consumption of the blower.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heating furnace control, and particularly relates to a control method, device and equipment of a heating furnace blower. BACKGROUND

[0002] The blower is used to provide combustion-supporting air to the heating furnace. Influenced by factors such as product structure, steel charging temperature, and tapping rhythm, the air consumption of the heating furnace is unstable, and the fluctuation range is large. In the related art, the blower is usually controlled at a power frequency, and the blower cannot adjust the blower power along with the change of the air consumption of the heating furnace, so that the power consumption of the blower may be wasted. SUMMARY

[0003] Embodiments of the present application provide a control method, device and equipment of a heating furnace blower, so that the blower frequency and the inlet valve opening degree can at least follow the air consumption demand of the heating furnace to some extent, and the power consumption of the blower is reduced.

[0004] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0005] According to a first aspect of embodiments of the present application, a control method of a heating furnace blower is provided, comprising:

[0006] obtaining a target air consumption of the heating furnace, and determining a target reference frequency and a target inlet valve opening degree of the blower according to a target air consumption interval corresponding to the target air consumption, wherein the target reference frequency and the target inlet valve opening degree are positively correlated with the target air consumption interval, respectively;

[0007] obtaining an actual air pressure value of the blower, and a deviation amount between the actual air pressure value and a preset target air pressure value;

[0008] adjusting the target reference frequency and the target inlet valve opening degree according to the deviation amount between the actual air pressure value and the preset target air pressure value, until the deviation amount between the actual air pressure value and the preset target air pressure value is less than or equal to a first threshold value.

[0009] In some embodiments of the present application, based on the foregoing scheme, before obtaining the target air consumption of the heating furnace, the method further comprises:

[0010] dividing the air supply amount of the blower into a plurality of air consumption intervals according to the air consumption demand of the heating furnace;

[0011] For each of the air volume intervals, the blower is controlled to operate according to the upper limit value of the air volume interval and a preset inlet valve opening degree, and during the operation, the frequency of the blower is adjusted until the air pressure value of the blower reaches a preset target air pressure value, and the current frequency of the blower is taken as the reference frequency corresponding to the air volume interval.

[0012] In some embodiments of the present application, based on the foregoing scheme, the target reference frequency and the target inlet valve opening degree of the blower are determined according to the target air volume interval corresponding to the target air volume, comprising:

[0013] If the target air volume reaches the target air volume interval and lasts for a first time length, the target reference frequency and the target inlet valve opening degree of the blower are determined according to the target air volume interval, and the target reference frequency and the target inlet valve opening degree are maintained for at least a second time length.

[0014] In some embodiments of the present application, based on the foregoing scheme, the adjustment of the target reference frequency and the target inlet valve opening degree comprises:

[0015] The target reference frequency is adjusted at a first adjustment speed, and the target inlet valve opening degree is adjusted at a second adjustment speed;

[0016] The first adjustment speed is less than the second adjustment speed.

[0017] In some embodiments of the present application, based on the foregoing scheme, the first adjustment speed is less than or equal to 0.03 Hz / s, and the second adjustment speed is less than or equal to 0.5% / s.

[0018] In some embodiments of the present application, based on the foregoing scheme, the blower comprises a first blower and a second blower, and during the operation of the first blower and the second blower, the method further comprises:

[0019] The first blower and the second blower are controlled to always maintain a preset opening degree difference, and the preset opening degree difference is an inlet valve opening degree difference corresponding to the same air outlet capacity maintained by the first blower and the second blower.

[0020] In some embodiments of the present application, based on the foregoing scheme, the preset opening degree difference is determined in the following manner:

[0021] A first current when the first blower operates at a preset frequency and a second current when the second blower operates at the preset frequency are obtained;

[0022] if the deviation between the first current and the second current is greater than or equal to a second threshold, adjusting an opening degree of a first inlet valve of the first air blower and / or adjusting an opening degree of a second inlet valve of the second air blower until the deviation between the first current and the second current is less than the second threshold;

[0023] obtaining a first current opening degree of the first inlet valve and a second current opening degree of the second inlet valve, and taking a difference between the first current opening degree and the second current opening degree as the preset opening degree difference.

[0024] In some embodiments of the present application, based on the foregoing scheme, the minimum frequency of the air blower is determined according to the allowed minimum air pressure of the air blower and a preset opening degree of the inlet valve, the preset opening degree being 25%, the opening degree of the inlet valve being greater than or equal to 20% and less than or equal to 90%.

[0025] According to a second aspect of the embodiments of the present application, a control device of a heating furnace air blower is provided, comprising:

[0026] a determination unit configured to obtain a target air volume of the heating furnace, and determine a target reference frequency and a target inlet valve opening degree of the air blower according to a target air volume interval corresponding to the target air volume, wherein the target reference frequency and the target inlet valve opening degree are positively correlated with the target air volume interval, respectively;

[0027] an obtaining unit configured to obtain an actual air pressure value of the air blower, and a deviation between the actual air pressure value and a preset target air pressure value;

[0028] an adjusting unit configured to adjust the target reference frequency and the target inlet valve opening degree according to the deviation between the actual air pressure value and the preset target air pressure value, until the deviation between the actual air pressure value and the preset target air pressure value is less than or equal to a first threshold.

[0029] According to a third aspect of the embodiments of the present application, an electronic device is provided, comprising one or more processors and one or more memories, the one or more memories storing at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to implement operations performed by the method according to any one of the first aspect.

[0030] In the application, the air supply amount of the air blower is divided into multiple air volume intervals according to the air volume requirement of the heating furnace, and the corresponding reference frequency and initial inlet valve opening degree are set for each air volume interval. In the application process, the air blower can be adjusted to the reference frequency and the initial inlet valve opening degree according to the corresponding air volume interval of the air volume requirement of the heating furnace, and then the frequency and the inlet valve opening degree of the air blower are fine-tuned on the basis of the reference frequency and the initial inlet valve opening degree, so that the frequency and the inlet valve opening degree of the air blower follow the air volume requirement of the heating furnace, reduce the power consumption of the air blower, avoid the air pressure fluctuation caused by the excessive frequency and opening degree adjustment, and avoid the problem of heating furnace operation failure caused by excessive air pressure fluctuation.

[0031] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the application, and together with the specification, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0033] Figure 1 A flow chart of the control method of the heating furnace air blower in the embodiment of the application is shown;

[0034] Figure 2 A structural schematic diagram of the air blower in the embodiment of the application is shown;

[0035] Figure 3 A structural diagram of the control device of the heating furnace air blower in the embodiment of the application is shown;

[0036] Figure 4 A structural schematic diagram of the computer system of the electronic device suitable for realizing the embodiment of the application is shown. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0038] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.

[0039] The block diagrams in the drawings show only the functionality of the embodiments and do not necessarily imply a particular arrangement of circuitry and / or software. For example, the functions could be provided in software, hardware, or a combination of both. In an embodiment, the functions can be provided as one or more modules or components.

[0040] The flow diagrams depicted in the drawings show the functionality of the embodiments and do not necessarily imply a particular order of execution, nor that individual blocks must be performed in any particular order. For example, certain steps can be combined or performed in parallel, and the order of the steps can be changed.

[0041] It should also be noted that terms like "first" and "second", and the like, can be used herein to describe various elements, but do not mean that these elements must be in a particular order or have a particular relationship to each other. It should be understood that these elements can be interchanged, as appropriate, to describe the embodiments of the application described herein, which can be practiced in other than the illustrated or described order.

[0042] The air blower is used to provide combustion air for the heating furnace, and generally two air blowers are provided for the heating furnace, and the two air blowers supply air for the heating furnace according to constant air pressure. For example, one is used and one is reserved according to the design, or one is used according to the design of low load, and two are used according to the design of high load. Due to the influence of factors such as product structure, steel charging temperature, and tapping rhythm, the air consumption of the heating furnace is unstable, and the fluctuation range can reach 20%-120% of the rated capacity. At present, most combustion air blowers are controlled at power frequency, and the power of the air blower cannot be adjusted with the change of air volume. Only the inlet valve of the air blower is relied on to adjust the air supply of the air blower, which causes waste of power consumption of the air blower.

[0043] In addition, with the continuous improvement of the production capacity of the rolling line, the heating furnace will be operated at a stage of exceeding the design capacity. At this time, the air supply of one blower is insufficient, and the air supply is sufficient after two blowers are started. In general, in order to ensure the stability of the production capacity and the safety of the operation of the heating furnace, two blowers will be started for a long time, which also causes waste of power consumption of the blower. In addition, although some heating furnaces currently use frequency conversion blowers to supply air, the blowers do not achieve the expected effect in the use process. The main reason is that the heating furnace requires constant air supply pressure, and the air supply fluctuates greatly due to the production conditions. When the air supply changes greatly, the frequency of the blower frequency converter adjusts, and the air pressure oscillates greatly, which cannot meet the demand of constant air pressure. At the same time, it is easy to cause the blower to surge, especially during the operation of two blowers. Due to the differences in pipeline and blower capacity, the outlet air pressures of the two blowers are different, causing the blower to surge back at a stage, resulting in blower failure. Influenced by the above factors, the frequency conversion blower of the heating furnace can only be operated at a power frequency, and the energy saving purpose has not been achieved.

[0044] Therefore, the first aspect of the embodiment of the present application provides a control method of a heating furnace blower to at least solve the above at least one problem. The above method of the embodiment of the present application will be described below in combination with the drawings.

[0045] Figure 1 The control method flow chart of the heating furnace blower of the embodiment of the present application is shown. Figure 2 The structure schematic diagram of the blower of the embodiment of the present application is shown.

[0046] Referring to Figure 1 and Figure 2 According to the first aspect of the embodiment of the present application, a control method of a heating furnace blower is provided, which can be executed on a blower frequency converter. The method includes but is not limited to:

[0047] Step S1. Obtain the target air quantity of the heating furnace, and determine the target reference frequency and the target inlet valve opening degree of the blower according to the target air quantity interval corresponding to the target air quantity, wherein the target reference frequency and the target inlet valve opening degree are positively correlated with the target air quantity interval respectively;

[0048] It can be understood that the target air quantity of the heating furnace can be the required air quantity of the heating furnace. Since the air supply quantity of the blower needs to adapt to the change of the required air quantity of the heating furnace, the air supply quantity of the blower matches the required air quantity of the heating furnace. Therefore, obtaining the target air quantity of the heating furnace is equivalent to obtaining the target air quantity (air supply quantity) of the blower.

[0049] For example, the air supply of the air blower can be divided into multiple air volume intervals according to the air volume requirement of the heating furnace, the target air volume interval is one of the air volume intervals, the target reference frequency refers to the initial frequency of the air blower corresponding to the target air volume interval, the target inlet valve opening degree refers to the initial opening degree of the inlet valve of the air blower corresponding to the target air volume interval, and the target reference frequency and the target inlet valve opening degree are positively correlated with the target air volume interval, that is, the greater the air supply corresponding to the target air volume interval, the greater the target reference frequency and the target inlet valve opening degree.

[0050] In some embodiments, based on the foregoing scheme, before obtaining the target air volume of the heating furnace, the method further comprises:

[0051] 1) According to the air volume requirement of the heating furnace, the air supply of the air blower is divided into multiple air volume intervals;

[0052] For example, according to the air volume requirement of the heating furnace, the air supply of the air blower is divided into multiple air volume intervals, which are Q1<500,000 Nm 3 ; 500,000 Nm 3 ≤Q2≤800,000 Nm 3 ; Q3>800,000 Nm 3 , wherein Q represents the air volume.

[0053] 2) For each air volume interval, control the air blower to operate according to the upper limit value of the air volume interval and the preset inlet valve opening degree, adjust the frequency of the air blower during operation until the air pressure value of the air blower reaches the preset target air pressure value, and record the current frequency of the air blower as the reference frequency corresponding to the air volume interval.

[0054] For example, for the first air volume interval, the air volume is adjusted to 500,000, the opening degree of the air blower inlet valve is set to 70%, the above air volume and the above inlet valve opening degree are maintained, the air blower frequency is adjusted, and the air pressure is adjusted to 10kpa. Record the air blower frequency f1 at this time as the reference frequency of the first air volume interval.

[0055] For example, for the second air volume interval, the air volume is adjusted to 800,000, the opening degree of the air blower inlet valve is set to 90%, the above air volume and the above inlet valve opening degree are maintained, the air blower frequency is adjusted, and the air pressure is adjusted to 10kpa. Record the air blower frequency f2 at this time as the reference frequency of the second air volume interval.

[0056] For example, for the third air volume interval, the air volume is adjusted to the maximum design capacity of the heating furnace, the opening degree of the fan inlet valve is set to 90%, the air volume and the inlet valve opening degree are maintained, the fan frequency is adjusted until the air pressure reaches 10 kPa, and the fan frequency f3 at this time is recorded as the reference frequency of the third air volume interval.

[0057] It can be understood that, according to the air volume demand of the heating furnace, the air supply volume of the blower fan is divided into multiple air volume intervals, and the corresponding reference frequency and initial inlet valve opening degree are set for each air volume interval. In actual application, the blower fan can be adjusted to the reference frequency and the initial inlet valve opening degree according to the corresponding air volume interval of the air volume demand of the heating furnace, and then the blower fan frequency and the inlet valve opening degree are fine-tuned based on the reference frequency and the initial inlet valve opening degree, so that the fan frequency and the inlet valve opening degree follow the air volume demand of the heating furnace, reduce the power consumption of the fan, and avoid the problems of air pressure fluctuation caused by excessive adjustment of the frequency and the opening degree, and the operation failure of the heating furnace caused by excessive air pressure fluctuation.

[0058] In addition, it can be understood that, since the low load interval of the heating furnace is a high-risk interval of fan surge, the application sets a smaller inlet valve opening degree for the low air volume interval, so that when there is a risk of fan surge, the inlet valve opening degree can be reduced more quickly, the response speed is improved, and the risk of surge is reduced.

[0059] In some embodiments, the target reference frequency and the target inlet valve opening degree of the blower fan are determined according to the target air volume interval corresponding to the target air volume, comprising:

[0060] If the target air volume reaches the target air volume interval and lasts for a first time length, the target reference frequency and the target inlet valve opening degree of the blower fan are determined according to the target air volume interval, and the target reference frequency and the target inlet valve opening degree are maintained for at least a second time length.

[0061] For example, if the target air volume reaches the first air volume interval, and the target air volume lasts for 1 minute, the target reference frequency and the target inlet valve opening degree of the blower fan are determined according to the target air volume interval, for example, the reference frequency f1 and the inlet valve opening degree 70%, and the blower fan is maintained at the reference frequency and the inlet valve opening degree 70% for at least 2 minutes, so as to avoid the air pressure shock caused by frequent changes of the fan frequency and the inlet valve opening degree.

[0062] Step S2. Obtain the actual air pressure value of the blower fan, and the deviation between the actual air pressure value and the preset target air pressure value;

[0063] For example, the actual air pressure value of the blower fan is obtained by measuring the air pressure value of the blower fan, and the deviation between the actual air pressure value and the target air pressure value is obtained by comparing the actual air pressure value with the target air pressure value. Figure 2As shown, the actual wind pressure value of the blower can be collected by a wind pressure detection device arranged at the outlet of the blower, and the wind pressure detection device can be a pressure sensor; the preset target wind pressure value can be a commonly used wind pressure value of the heating furnace, for example, 10 kPa.

[0064] Step S3. Adjusting the target reference frequency and the target inlet valve opening according to the deviation between the actual wind pressure value and the preset target wind pressure value until the deviation between the actual wind pressure value and the preset target wind pressure value is less than or equal to a first threshold value.

[0065] In some embodiments, the adjusting of the target reference frequency and the target inlet valve opening comprises:

[0066] adjusting the target reference frequency at a first adjusting speed and adjusting the target inlet valve opening at a second adjusting speed;

[0067] wherein the first adjusting speed is less than the second adjusting speed.

[0068] For example, after setting the reference frequency f1, the frequency of the blower and the opening of the inlet valve are simultaneously adjusted according to the deviation between the actual wind pressure value and the target value (10 kPa) by a PID (proportional-integral-derivative) closed-loop control algorithm; in addition, since the inlet valve opening has a greater impact on the wind pressure, preferentially adjusting the inlet valve opening can make the wind pressure and the air volume change smoothly, and therefore, the adjusting speed of the inlet valve opening is set to be greater than the adjusting speed of the frequency, for example, the first adjusting speed is less than or equal to 0.03 Hz / s, and the second adjusting speed is less than or equal to 0.5% / s. Thus, the wind pressure fluctuation is further reduced, and the running failure of the heating furnace caused by the change of the wind pressure is prevented.

[0069] In some embodiments, the minimum frequency of the blower is determined according to the allowable minimum wind pressure of the blower and a preset opening of the inlet valve, and the preset opening is 25%, and the opening of the inlet valve is greater than or equal to 20% and less than or equal to 90%.

[0070] It can be understood that since the wind pressure of the blower is determined by the inlet valve opening and the frequency, the minimum frequency of the blower can be determined reversely in the case that the allowable minimum wind pressure of the blower and the preset opening of the inlet valve are determined, and if the minimum frequency is lower than the minimum frequency, the wind pressure may be too low, thereby causing a safety hazard of the heating furnace. In addition, the preset opening corresponding to the minimum wind pressure and the minimum frequency is set to 25%, which mainly considers the problem of blower surge, and if the inlet valve is too large, the blower may surge.

[0071] In addition, the maximum frequency of the blower can be determined according to the reference frequency of the maximum one of the air volume intervals, for example, the reference frequency of the maximum one of the air volume intervals is f3, and the maximum frequency of the blower is set as f4, f4 can be increased by a certain fault tolerance amount on the basis of f3, for example, f4 = f3 + 2H, thereby ensuring the stability of the air pressure under extreme conditions.

[0072] It can be understood that if the minimum opening degree of the inlet valve is set too low, the air pressure may be suddenly reduced due to equipment errors, thereby causing safety hazards of the heating furnace; and if the maximum opening degree of the inlet valve is too large, the inlet valve has no obvious adjustment effect on the air pressure and air volume after exceeding the upper limit, and there is a risk of equipment jamming, therefore, the opening degree of the inlet valve of the blower in the embodiments of the present application is greater than or equal to 20% and less than or equal to 90%.

[0073] In some embodiments, the blower includes a first blower and a second blower, and during operation of the first blower and the second blower, the method further includes:

[0074] Step S4. Controlling the first blower and the second blower to always maintain a preset opening degree difference value, the preset opening degree difference value being an inlet valve opening degree difference value corresponding to the same air outlet capacity maintained by the first blower and the second blower.

[0075] It can be understood that when two blowers are enabled at the same time, the reference frequency of the blowers is determined according to the above steps S1 to S3, and during use, the frequencies and the inlet valve opening degrees of the two blowers are adjusted synchronously to ensure that the loads of the two blowers change synchronously. However, due to factors such as the state of the blowers and the pipeline, the actual loads of the two blowers may deviate, and when the air volume changes greatly, the blowers are prone to surge. Therefore, the embodiments of the present application compare the current situations of the two blowers under the same operating frequency and inlet valve opening degree, and if the current deviation is large, it is considered that the actual loads of the blowers deviate, and the embodiments of the present application always maintain differential control of the inlet valve opening degrees of the two blowers during operation of the two blowers, thereby reducing the risk of surge caused by differences in production consistency between the two blowers.

[0076] It should be noted that the differential control between the two blowers can be achieved by a preset opening degree value, and the determination method of the preset opening degree difference value is described as follows:

[0077] 1) Obtain a first current of the first blower running at a preset frequency, and a second current of the second blower running at the preset frequency;

[0078] 2) if the deviation between the first current and the second current is greater than or equal to a second threshold value, then adjusting the opening degree of the first inlet valve of the first air blower and / or adjusting the opening degree of the second inlet valve of the second air blower until the deviation between the first current and the second current is less than the second threshold value;

[0079] 3) obtaining a first current opening degree of the first inlet valve and a second current opening degree of the second inlet valve, and taking a difference between the first current opening degree and the second current opening degree as the preset opening degree difference.

[0080] For example, two air blowers are respectively operated at a frequency of 43HZ, the current of No. 1 air blower is 13A, and the current of No. 2 air blower is 15A. By gradually reducing the opening degree of the inlet valve of No. 2 air blower or gradually increasing the opening degree of the inlet valve of No. 1 air blower, the currents of the two air blowers are close to each other, so that the difference between the currents is controlled within 3% of the rated current. The difference between the opening degrees of the inlet valves of the two air blowers at this time is recorded as a constant difference between the opening degrees of the inlet valves of the two air blowers. In actual application, the opening degrees of the inlet valves of the two air blowers are always adjusted according to the difference. At this time, the loads of the two air blowers are always consistent, and the surge problem can be effectively solved.

[0081] Referring to Figure 3 , a control device structure diagram of a heating furnace air blower is shown.

[0082] As shown in Figure 3 , according to the second aspect of the embodiment of the present application, a control device 200 of a heating furnace air blower is provided, comprising:

[0083] A determination unit 201 is configured to obtain a target air volume of a heating furnace, and determine a target reference frequency and a target inlet valve opening degree of the air blower according to a target air volume interval corresponding to the target air volume, wherein the target reference frequency and the target inlet valve opening degree are positively correlated with the target air volume interval, respectively.

[0084] An acquisition unit 202 is configured to obtain an actual air pressure value of the air blower, and a deviation between the actual air pressure value and a preset target air pressure value.

[0085] An adjustment unit 203 is configured to adjust the target reference frequency and the target inlet valve opening degree according to the deviation between the actual air pressure value and the preset target air pressure value, until the deviation between the actual air pressure value and the preset target air pressure value is less than or equal to a first threshold value.

[0086] According to a third aspect of the embodiments of the present application, an electronic device is provided, comprising one or more processors and one or more memories, the one or more memories having at least one program code stored therein, the at least one program code being loaded and executed by the one or more processors to implement the operations performed by the method according to any one of the first aspect.

[0087] Figure 4 A structural schematic diagram of a computer system suitable for implementing the electronic device of the embodiments of the present application is shown. It should be understood that, Figure 4 The electronic device 400 shown is merely one example and should not be taken as limiting the functionality and use of the embodiments of the present application.

[0088] As Figure 4 shown, the electronic device 400 is in the form of a general computing device. The components of the electronic device 400 can include, but are not limited to, the at least one processing unit 410 described above, the at least one storage unit 420 described above, and a bus 430 connecting different system components, including the storage unit 420 and the processing unit 410.

[0089] The storage unit stores program codes which can be executed by the processing unit 410, so that the processing unit 410 performs the steps described in the above "Embodiment Method" section according to various exemplary embodiments of the present application.

[0090] The storage unit 420 can include a readable medium in the form of a volatile storage unit, such as a random access memory (RAM) 421 and / or a cache memory 422, and can further include a read-only memory (ROM) 423.

[0091] The storage unit 420 can further include program / utility 424 having a set of at least one program modules 425, including but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination thereof can include implementation of a network environment.

[0092] The bus 430 can be one or more of several types of bus structures, including a storage unit bus or storage unit controller, a peripheral bus, a graphics acceleration port, a processing unit bus, or a local bus using any of a variety of bus architectures.

[0093] The electronic device 400 can also communicate with one or more external devices 500 such as a keyboard or pointing device, a Bluetooth device, or a device for Figure 4 communicating with other computing devices. Communication with such external devices 500 can occur, for example, through the input and output (I / O) interface(s) 450. Still yet, the electronic device 400 can communicate with one or more networks, such as one or more local area networks (LANs), wide area networks (WANs), and / or the Internet, through a network adapter 460. As depicted, the network adapter 460 communicates with the other components of the electronic device 400 through the bus 430. It should be appreciated that the network adapter 460 and / or the other hardware and / or software components depicted in FIG. 4 can be utilized in other electronic devices, such as a mobile device, a tablet device, a desktop computer, a laptop computer, a server, a handheld device, etc.

[0094] The embodiments described herein should be understood as being in no way limited to any of the embodiments illustrated, but are amenable to various changes and modifications without departing from the spirit thereof.

Claims

1. A control method for a heating furnace blower, characterized in that, include: The target air volume of the heating furnace is obtained, and the target reference frequency and target inlet valve opening of the blower are determined according to the target air volume range corresponding to the target air volume. The target reference frequency and the target inlet valve opening are positively correlated with the target air volume range. Obtain the actual air pressure value of the blower, and the deviation between the actual air pressure value and the preset target air pressure value; Based on the deviation between the actual wind pressure value and the preset target wind pressure value, the target reference frequency and the target inlet valve opening are adjusted until the deviation between the actual wind pressure value and the preset target wind pressure value is less than or equal to a first threshold. Before obtaining the target air volume of the heating furnace, the method further includes: Based on the air volume requirements of the heating furnace, the air supply volume of the blower is divided into multiple air volume ranges; For each air volume range, the blower is controlled to operate according to the upper limit of the air volume range and the preset inlet valve opening. During operation, the frequency of the blower is adjusted until the air pressure value of the blower reaches the preset target air pressure value. The current frequency of the blower is used as the reference frequency corresponding to the air volume range. The adjustment of the target reference frequency and the target inlet valve opening includes: The target reference frequency is adjusted according to a first adjustment speed, and the target inlet valve opening is adjusted according to a second adjustment speed. Wherein, the first adjustment speed is less than the second adjustment speed.

2. The method according to claim 1, characterized in that, The step of determining the target reference frequency and target inlet valve opening of the blower based on the target air volume range corresponding to the target air volume includes: If the target air volume reaches the target air volume range and remains there for a first duration, then the target reference frequency of the blower and the target inlet valve opening are determined according to the target air volume range, and the target reference frequency and the target inlet valve opening are maintained for at least a second duration.

3. The method according to claim 1, characterized in that, The first adjustment speed is less than or equal to 0.03 Hz / second, and the second adjustment speed is less than or equal to 0.5% / second.

4. The method according to claim 1, characterized in that, The blower includes a first blower and a second blower. During the operation of the first blower and the second blower, the method further includes: The first blower and the second blower are controlled to always maintain a preset opening difference value, which is the difference in the opening of the inlet valve corresponding to the first blower and the second blower maintaining the same air output capacity.

5. The method according to claim 4, characterized in that, The preset opening difference is determined as follows: The first current of the first blower when it operates at a preset frequency, and the second current of the second blower when it operates at the preset frequency are obtained; If the deviation between the first current and the second current is greater than or equal to the second threshold, the opening of the first inlet valve of the first blower and / or the opening of the second inlet valve of the second blower shall be adjusted until the deviation between the first current and the second current is less than the second threshold. Obtain the first current opening degree of the first inlet valve and the second current opening degree of the second inlet valve, and use the opening degree difference between the first current opening degree and the second current opening degree as the preset opening degree difference value.

6. The method according to any one of claims 1-5, characterized in that, The minimum frequency of the blower is determined based on the minimum allowable air pressure of the blower and the preset opening degree of the inlet valve, wherein the preset opening degree is 25% and the opening degree of the inlet valve is greater than or equal to 20% and less than or equal to 90%.

7. A control device for a heating furnace blower, characterized in that, include: The determining unit is used to obtain the target air volume of the heating furnace, and determine the target reference frequency and target inlet valve opening of the blower according to the target air volume range corresponding to the target air volume, wherein the target reference frequency and the target inlet valve opening are positively correlated with the target air volume range. The acquisition unit is used to acquire the actual wind pressure value of the blower, and the deviation between the actual wind pressure value and the preset target wind pressure value; The adjustment unit is used to adjust the target reference frequency and the target inlet valve opening according to the deviation between the actual wind pressure value and the preset target wind pressure value, until the deviation between the actual wind pressure value and the preset target wind pressure value is less than or equal to a first threshold. Before obtaining the target air volume for the heating furnace, the device is also used for: Based on the air volume requirements of the heating furnace, the air supply volume of the blower is divided into multiple air volume ranges; For each air volume range, the blower is controlled to operate according to the upper limit of the air volume range and the preset inlet valve opening. During operation, the frequency of the blower is adjusted until the air pressure value of the blower reaches the preset target air pressure value. The current frequency of the blower is used as the reference frequency corresponding to the air volume range. The adjustment of the target reference frequency and the target inlet valve opening includes: The target reference frequency is adjusted according to a first adjustment speed, and the target inlet valve opening is adjusted according to a second adjustment speed. Wherein, the first adjustment speed is less than the second adjustment speed.

8. An electronic device, characterized in that, It includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation performed by the method as described in any one of claims 1-6.

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