CN107703843B - Wind pressure control method and device of unit, storage medium and unit - Google Patents
Wind pressure control method and device of unit, storage medium and unit Download PDFInfo
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Abstract
The invention discloses a wind pressure control method, a wind pressure control device, a storage medium and a unit, wherein the method comprises the following steps: determining whether a zero point signal of a wind pressure sensor of the unit needs to be corrected or not; and if the zero point signal needs to be corrected, resetting the zero point signal so that the unit can control the wind pressure according to the new zero point signal obtained by resetting. The scheme of the invention can overcome the defects that the prior art can not meet the wind pressure protection requirement, has large error, poor user experience and the like, and has the beneficial effects of meeting the wind pressure protection requirement, having small error and good user experience.
Description
Technical Field
The invention belongs to the technical field of wind pressure control, and particularly relates to a wind pressure control method, a wind pressure control device, a storage medium and a unit of the unit, in particular to a wind pressure control method of the unit using a micro-pressure sensor, a device corresponding to the method, a storage medium storing instructions of the method, and an instruction capable of executing the method or a unit with the device.
Background
A wall-mounted furnace (namely a gas wall-mounted heating furnace) can be a water heater using natural gas as energy and has multiple safety protection measures such as anti-freezing protection, dry burning prevention protection, accidental flameout protection, over-high temperature protection, water pump anti-blocking protection and the like. The development of wall-mounted furnaces in the current market has a development trend of changing from a constant-speed fan to a variable-speed fan.
Because of the use of the variable speed fan, the required optimal air quantity can be supplied in real time according to the requirement of combustion air, so that the combustion always occurs in the range of the optimal air-fuel ratio. By supplying combustion air as needed, the thermal efficiency at low power can be increased from about 86% to about 91%. Thus reducing the waste of energy and protecting the environment.
However, with the speed change of the fan, the wind pressure switch, which was previously used as a wind pressure protection component, cannot meet the requirement of the whole-course wind pressure protection of the speed change of the fan. For example: the unit is enabled to have the situation that the detected air volume does not meet the requirement, but the air volume is actually enough. For another example: when the error of the micro-pressure switch is poor, the error is too large, the normal work of the unit is influenced theoretically, but the error of the micro-pressure sensor is not large actually.
In the prior art, the method has the defects that the wind pressure protection requirement cannot be met, the error is large, the user experience is influenced and the like.
Disclosure of Invention
The invention aims to provide a wind pressure control method and device of a unit, a storage medium and the unit aiming at the defects, so as to solve the problem that a wind pressure switch in the prior art cannot meet the requirement of the whole-course wind pressure protection of the speed change of a fan, and achieve the effect of meeting the requirement of wind pressure protection.
The invention provides a wind pressure control method of a unit, which comprises the following steps: determining whether a zero point signal of a wind pressure sensor of the unit needs to be corrected or not; and if the zero point signal needs to be corrected, resetting the zero point signal so that the unit can control the wind pressure according to the new zero point signal obtained by resetting.
Optionally, determining whether a zero signal of a wind pressure sensor of the plant needs to be corrected includes: determining whether the zero point signal increases to a first set range; if the zero point signal is increased to the first set range, the zero point signal needs to be corrected; and/or acquiring a difference value between the zero point signal and a set standard value, namely a zero point deviation value; determining whether the zero offset value increases to a second set range; if the zero offset value is increased to the second setting range, the zero signal needs to be corrected; and/or acquiring the current output signal of the wind pressure sensor; determining whether the output signal is less than or equal to a lower limit of a third set range or greater than or equal to an upper limit of the third set range; if the output signal is less than or equal to the lower limit of the third set range or greater than or equal to the upper limit of the third set range, the zero point signal needs to be corrected; and/or, determining whether the set correction time is reached; and if the correction time is up, correcting the zero point signal.
Optionally, determining whether a zero signal of a wind pressure sensor of the plant needs to be corrected further includes: determining whether the zero offset value is increasing; and if the zero offset value is increased, determining whether the zero offset value is increased to the second set range.
Optionally, the zero point signal is specifically: the wind pressure sensor outputs a signal when the wind pressure is zero; wherein the output signal comprises: at least one of an output voltage signal and an output current signal; accordingly, the zero point signal includes: at least one of the zero voltage signal and the zero current signal.
Optionally, resetting the zero signal comprises: enabling a zero point signal of the wind pressure sensor to return to zero; or setting the current output signal of the wind pressure sensor as a new zero signal.
Optionally, zeroing the zero signal of the wind pressure sensor includes: enabling the wind pressure sensor to be electrified again; and/or receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
Optionally, the method further comprises: under the condition that the wind pressure sensor is powered on, acquiring a zero point signal of the wind pressure sensor of the unit through a main board of the unit; and/or initiating a prompt message for correcting the zero signal; and/or displaying at least one of the zero signal and the new zero signal.
In another aspect, the present invention provides a wind pressure control device for a machine set, including: the determining unit is used for determining whether the zero point signal of the wind pressure sensor of the unit needs to be corrected or not; and the execution unit is used for resetting the zero point signal if the zero point signal needs to be corrected, so that the unit can carry out wind pressure control according to the new zero point signal obtained by resetting.
Optionally, the determining unit determines whether a zero signal of a wind pressure sensor of the unit needs to be corrected, and specifically includes: determining whether the zero point signal increases to a first set range; if the zero point signal is increased to the first set range, the zero point signal needs to be corrected; and/or acquiring a difference value between the zero point signal and a set standard value, namely a zero point deviation value; determining whether the zero offset value increases to a second set range; if the zero offset value is increased to the second setting range, the zero signal needs to be corrected; and/or acquiring the current output signal of the wind pressure sensor; determining whether the output signal is less than or equal to a lower limit of a third set range or greater than or equal to an upper limit of the third set range; if the output signal is less than or equal to the lower limit of the third set range or greater than or equal to the upper limit of the third set range, the zero point signal needs to be corrected; and/or, determining whether the set correction time is reached; and if the correction time is up, correcting the zero point signal.
Optionally, the determining unit determines whether a zero signal of a wind pressure sensor of the unit needs to be corrected, and specifically includes: determining whether the zero offset value is increasing; and if the zero offset value is increased, determining whether the zero offset value is increased to the second set range.
Optionally, the zero point signal is specifically: the wind pressure sensor outputs a signal when the wind pressure is zero; wherein the output signal comprises: at least one of an output voltage signal and an output current signal; accordingly, the zero point signal includes: at least one of the zero voltage signal and the zero current signal.
Optionally, the resetting the zero signal by the execution unit includes: enabling a zero point signal of the wind pressure sensor to return to zero; or setting the current output signal of the wind pressure sensor as a new zero signal.
Optionally, the performing unit makes the zero point signal of the wind pressure sensor zero, including: enabling the wind pressure sensor to be electrified again; and/or receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
Optionally, the method further comprises: the determining unit is further configured to acquire a zero signal of a wind pressure sensor of the unit through a main board of the unit when the wind pressure sensor is powered on; and/or, the prompting unit is used for initiating a prompting message which needs to correct the zero signal; and/or, a display unit for displaying at least one of the zero point signal and the new zero point signal.
In accordance with the above method, a further aspect of the present invention provides a storage medium comprising: the storage medium has stored therein a plurality of instructions; the instructions are used for loading and executing the wind pressure control method of the unit by the processor.
In accordance with the above method or apparatus, a further aspect of the present invention provides a machine set, comprising: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; the instructions are stored by the memory, and are loaded by the processor and used for executing the wind pressure control method of the unit; or the wind pressure control device of the machine set is used for controlling the wind pressure of the machine set.
Optionally, the set includes: at least one of a unit of the wall-hanging stove, a unit of the gas water heater and an air conditioner.
According to the scheme of the invention, the zero point signal of the wind pressure sensor is self-corrected on time or according to conditions, and the influence caused by the deviation value is reduced through correction, so that the wind pressure switch can meet the requirement of the whole-course wind pressure protection of the fan speed change.
Further, according to the scheme of the invention, under the condition of power-on, the zero value of the unit of the wall-mounted furnace is detected to be large to a certain range, the self-correction program of the unit is automatically started, the zero is reset, the unit operates according to a new linear relation, the influence caused by the zero offset value and the like can be reduced, and the protection error is reduced.
Furthermore, according to the scheme of the invention, when the output electric signal (for example, the output signal of the pressure sensor, or the voltage signal output by the micro-pressure sensor signal wire, which can be a voltage signal or a current signal) is detected not to be between (U0, U2), the self-correction program of the unit is automatically started, the zero point is reset, and the operation reliability of the unit is prompted.
Furthermore, according to the scheme of the invention, after a period of time, the wind pressure is reset to zero again in a manual mode, so that the reliability of wind pressure control of the unit is improved, and the user experience is further improved.
Therefore, according to the scheme of the invention, the problem that the wind pressure switch in the prior art cannot meet the requirement of the whole-course wind pressure protection of the fan speed change is solved by detecting the output signal of the wind pressure sensor of the unit and correcting the zero setting value (such as a zero signal) of the wind pressure sensor according to the output signal, so that the defects that the wind pressure protection requirement cannot be met, the error is large and the user experience is poor in the prior art are overcome, and the beneficial effects that the wind pressure protection requirement can be met, the error is small and the user experience is good are realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of a wind pressure control method of a unit according to the present invention;
FIG. 2 is a flowchart illustrating an embodiment of determining whether zero correction is required according to the zero offset value in the method of the present invention;
FIG. 3 is a schematic flow chart illustrating an embodiment of determining whether zero point correction is required according to the output signal in the method of the present invention;
FIG. 4 is a schematic flow chart illustrating an embodiment of determining whether zero point correction is required according to the correction time in the method of the present invention;
FIG. 5 is a flowchart illustrating an embodiment of determining whether the zero offset value needs to be determined to increase to the second set range;
FIG. 6 is a schematic structural diagram of an embodiment of a wind pressure control device of the assembly according to the present invention;
fig. 7 is a schematic view of zero offset of an embodiment of a unit of a wall-hanging stove;
FIG. 8 is a schematic diagram of a theoretical zero-point linear curve of an embodiment of a unit of a wall-hanging stove;
fig. 9 is a schematic diagram of a zero-point upward-biased linear curve of an embodiment of a unit of a wall-hanging stove;
fig. 10 is a schematic view of a zero-point downward-biased linear curve of an embodiment of a unit of a wall-hanging stove.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
102-a determination unit; 104-an execution unit; 106-a prompt unit; 108-display unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, a wind pressure control method for a plant set is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The wind pressure control method of the unit can comprise the following steps:
at step S110, it is determined whether a zero point signal of a wind pressure sensor of the unit needs to be corrected.
For example: the pressure sensor has a signal output, that is, a voltage output signal of the micro-pressure sensor, for example, in a unit of the wall-hanging stove, the micro-pressure sensor outputs according to a linear formula of U1.23P +0.3, where U is an electrical signal output by the micro-pressure switch, and P is a pressure value received by the micro-pressure switch.
The zero point signal is specifically: and the wind pressure sensor outputs a signal when the wind pressure is zero.
For example: the zero voltage signal refers to a voltage signal output by the breeze pressure sensor at zero pressure.
Optionally, the zero point signal may include: at least one of the zero voltage signal and the zero current signal.
For example: the output signal when the wind pressure is zero and the zero voltage signal are both output signals. The zero point voltage signal is a form of a zero point signal, and the zero point signal may be a signal of various output forms such as voltage and current.
Therefore, zero signals in various forms can be selected according to actual needs by setting the zero signals in various forms, and the flexibility and convenience of wind pressure control are improved.
In an alternative example, the determining whether the zero-point signal of the wind pressure sensor of the plant needs to be corrected in step S110 may include: and determining whether zero point correction is needed according to the zero point signal.
Optionally, the process of determining whether zero point correction is required according to the zero point signal may specifically include: determining whether the zero point signal increases to a first set range; if the zero point signal increases to the first setting range, the zero point signal needs to be corrected.
For example: under the condition of power-on, if the zero value of the unit is detected to be large to a certain range, the self-correction program of the unit is automatically started, and the zero value is reset. The unit is operated according to the new linear relation.
Therefore, whether the zero point signal needs to be corrected or not is quickly determined by judging whether the zero point signal is increased to the first set range or not, and the judgment efficiency is high.
In an alternative example, the determining whether the zero-point signal of the wind pressure sensor of the plant needs to be corrected in step S110 may include: and determining whether zero point correction is needed or not according to the zero point deviation value.
The following further describes a specific process of determining whether zero point correction is required according to the zero point offset value, with reference to a flowchart of an embodiment of determining whether zero point correction is required according to the zero point offset value in the method of the present invention shown in fig. 2.
In step S210, a difference between the zero-point signal and a set standard value, that is, a zero-point offset value (i.e., a zero-point offset value) is obtained.
For example: the zero deviation value is a difference value between a real value of a voltage signal output by the breeze pressure sensor and a set standard value (for example, a nominal value in a specification) when the pressure is zero.
In step S220, it is determined whether the zero offset value is increased to a second setting range.
The zero point offset value may be determined whether or not the zero point offset value exceeds a certain setting range, and may also be determined whether or not the zero point offset value increases to a second setting range.
Optionally, before determining whether the zero offset value increases to the second setting range in step S220, the method may further include: it is determined whether it is necessary to determine whether the zero point deviation value increases to the second set range.
The specific process of determining whether the zero offset value needs to be determined to be increased to the second setting range is further defined with reference to the flowchart of fig. 5 illustrating an embodiment of determining whether the zero offset value needs to be determined to be increased to the second setting range.
Step S510, after acquiring a difference between the zero point signal and the set standard value, i.e., a zero point offset value, or before determining whether the zero point offset value increases to a second set range, determining whether the zero point offset value increases.
Since the zero point signal is changed, the difference between the zero point signal and the standard value, i.e., the zero point offset value, is also changed, and the zero point signal and the standard value are in one-to-one correspondence.
In step S520, if the zero offset value is increasing, it is determined whether the zero offset value is increasing to the second setting range.
Therefore, whether the zero offset value is increased to the second setting range is determined under the condition that the zero offset value is determined to be increased, whether the zero offset value is increased to the second setting range is judged when the zero offset value is increased so as to perform zero correction in time when needed, time and labor consumption caused by judging whether the zero offset value is increased to the second setting range for many times under the condition that the zero offset value is reduced or unchanged can be avoided, energy conservation is good, reliability is high, and improvement of efficiency and timeliness of zero correction is facilitated.
In step S230, if the zero-point deviation value increases to the second setting range, the zero-point signal needs to be corrected.
For example: under the condition of power-on, when the unit of the wall-mounted furnace detects that the zero value is large to a certain range, the self-correction program of the unit is automatically started, the zero value is reset, and the unit operates according to a new linear relation.
In an optional example, the determining whether the zero point signal of the wind pressure sensor of the plant needs to be corrected in step S110 may further include: and determining whether zero point correction is needed according to the output signal.
The following further describes a specific process of determining whether zero-point correction is required according to the output signal, with reference to a flowchart of an embodiment of determining whether zero-point correction is required according to the output signal in the method of the present invention shown in fig. 3.
And step S310, acquiring the current output signal of the wind pressure sensor.
Optionally, the output signal may include: and outputting at least one of the voltage signal and the current signal.
Step S320, determining whether the output signal is less than or equal to a lower limit of a third setting range or greater than or equal to an upper limit of the third setting range.
In step S330, if the output signal is less than or equal to the lower limit of the third setting range or greater than or equal to the upper limit of the third setting range, the zero point signal needs to be corrected.
For example: in the case of power-on, the unit of the wall-hanging stove checks that the zero deviation value is large to a certain range (see the examples shown in fig. 7 to 10), that is, when detecting that the output electric signal (for example, the output signal of the pressure sensor, or the voltage signal output by the micro-pressure sensor signal line, which may be a voltage signal or a current signal) is not between (U0, U2), the self-correction program of the unit is automatically started, and the zero point is reset.
In an optional example, the determining whether the zero point signal of the wind pressure sensor of the plant needs to be corrected in step S110 may further include: and determining whether zero point correction is needed according to the correction time.
The wavelet packet analysis process of the on-line monitoring in step S120 is further described with reference to a flowchart of an embodiment of determining whether zero point correction is required according to the correction time in the method of the present invention shown in fig. 4.
In step S410, it is determined whether the set correction time has arrived.
In step S420, if the correction time is reached, the zero point signal needs to be corrected.
Therefore, whether zero point correction is needed or not is determined in various modes, so that the flexibility of judging the zero point correction opportunity is good, the reliability is high, the judging process is simple, and the judging result is good in accuracy.
In step S120, if the zero signal needs to be corrected, the zero signal is reset, so that the unit performs wind pressure control according to the new zero signal obtained by resetting.
For example: the zero adjusting value of the wind pressure sensor is automatically set again through main control, the influence caused by zero offset of the wind pressure sensor is eliminated, and the probability of misinformation of the unit is reduced.
For example: the unit of hanging stove carries out the self-correction of wind pressure sensor zero point signal on time or according to the condition, reduces the influence that the deviation value brought through the correction.
Therefore, when the zero point needs to be corrected, the zero point signal is reset, so that the unit carries out wind pressure control according to the new zero point signal, the influence caused by zero point offset can be reduced, and the error protection rate is reduced.
In an alternative example, the resetting the zero signal in step S120 may include: and enabling the zero point signal of the wind pressure sensor to return to zero.
For example: the automatic start of the self-correcting program can be changed into manual operation. I.e. after a certain period of time, re-zeroing is performed with a manual version.
Optionally, zeroing the zero signal of the wind pressure sensor may include: and electrifying the wind pressure sensor again.
Where zeroing is setting the current state to the new zero. This re-zeroing may be done in the same manner as described above for the resetting of the zero point.
For example: the manual version may be to power up again. The power-on mode can be a power-on/off mode, and the like.
Optionally, zeroing the zero signal of the wind pressure sensor, may further include: and receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
For example: zeroing by calling other programs.
Therefore, the reset is carried out by the control of the re-electrifying or resetting module, the resetting mode is flexible and selectable, and the convenience and the reliability of the use of the user are better.
In an optional example, the resetting the zero signal in step S120 may further include: and setting the current output signal of the wind pressure sensor as a new zero signal.
For example: the self-correcting program of the unit can be as follows: when the main board detects the micro-pressure sensor, under the condition of no wind pressure, the output signal exceeds the preset range, and then the unit defaults the output voltage of the current micro-pressure sensor to be the corresponding output voltage signal at the new zero pressure according to a certain program. The new linear formula is changed to U ═ 1.23P + a, and a is the output voltage signal of the current micro-pressure sensor.
For example: for example: when the zero voltage signal is detected to be U2, the main control program automatically resets the output voltage signal at the moment to be a new zero voltage signal. The curve of the zero voltage signal will be from the initial UOutput voltage＝kx+U1Is changed into UOutput voltage＝kx+U2In this way, the unit operates in a new linear relationship.
Therefore, zero point correction is carried out in a zero resetting or new zero point signal resetting mode, so that the zero point correction mode is flexible and various, and convenience and universality in use of zero point correction are improved.
In an alternative embodiment, the method may further include: before determining whether a zero signal of a wind pressure sensor of the unit needs to be corrected, acquiring the zero signal of the wind pressure sensor of the unit through a main board of the unit under the condition that the wind pressure sensor is powered on.
Therefore, the zero point signal is obtained through the main board of the unit, the obtaining mode is simple and convenient, and the reliability of the obtained result is high.
In an alternative embodiment, the method may further include: and initiating a prompt message (such as a voice prompt message, an audible and visual alarm lamp prompt message, and also a short message sent to the client) which needs to correct the zero point signal.
Therefore, the zero point correction is required to be carried out, so that a user can know the wind pressure control situation at any time, or the user can be aware of possible faults to carry out fault finding and processing because the prompt is not received, and the zero point correction method is high in reliability and good in humanization.
In an alternative embodiment, the method may further include: and displaying at least one of the zero signal and the new zero signal.
Therefore, zero signals before and after zero point correction are displayed, so that a user can clearly know the zero point condition in wind pressure control, and the method is strong in intuition and high in reliability.
A large number of tests verify that the technical scheme of the embodiment is adopted, the zero-point signal of the wind pressure sensor is self-corrected on time or according to conditions, and the influence caused by the deviation value is reduced through correction, so that the wind pressure switch can meet the requirement of whole-course wind pressure protection of fan speed change.
According to the embodiment of the invention, the wind pressure control device of the unit corresponding to the wind pressure control method of the unit is also provided. Referring to fig. 6, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The wind pressure control device of the unit may include: a determination unit 102 and an execution unit 104.
In an alternative example, the determining unit 102 may be configured to determine whether a zero point signal of a wind pressure sensor of the plant needs to be corrected. The specific function and processing of the determination unit 102 are referred to in step S110.
For example: the pressure sensor has a signal output, that is, a voltage output signal of the micro-pressure sensor, for example, in a unit of the wall-hanging stove, the micro-pressure sensor outputs according to a linear formula of U1.23P +0.3, where U is an electrical signal output by the micro-pressure switch, and P is a pressure value received by the micro-pressure switch.
The zero point signal is specifically: and the wind pressure sensor outputs a signal when the wind pressure is zero.
For example: the zero voltage signal refers to a voltage signal output by the breeze pressure sensor at zero pressure.
Optionally, the zero point signal may include: at least one of the zero voltage signal and the zero current signal.
For example: the output signal when the wind pressure is zero and the zero voltage signal are both output signals. The zero point voltage signal is a form of a zero point signal, and the zero point signal may be a signal of various output forms such as voltage and current.
Therefore, zero signals in various forms can be selected according to actual needs by setting the zero signals in various forms, and the flexibility and convenience of wind pressure control are improved.
Optionally, the determining unit 102 determines whether the zero point signal of the wind pressure sensor of the plant needs to be corrected, and may include: and determining whether zero point correction is needed according to the zero point signal.
In an optional specific example, the determining unit 102 determines whether a zero point correction process is required according to the zero point signal, and specifically may include: determining whether the zero point signal increases to a first set range; if the zero point signal increases to the first setting range, the zero point signal needs to be corrected.
For example: under the condition of power-on, if the zero value of the unit is detected to be large to a certain range, the self-correction program of the unit is automatically started, and the zero value is reset. The unit is operated according to the new linear relation.
Therefore, whether the zero point signal needs to be corrected or not is quickly determined by judging whether the zero point signal is increased to the first set range or not, and the judgment efficiency is high.
Optionally, the determining unit 102 determines whether a zero signal of a wind pressure sensor of the plant needs to be corrected, and specifically may include: and determining whether zero point correction is needed or not according to the zero point deviation value.
In an alternative specific example, the determining unit 102 may be further configured to obtain a difference value between the zero point signal and a set standard value, i.e., a zero point offset value (i.e., a zero point offset value). The specific function and processing of the determination unit 102 are also referred to in step S210.
For example: the zero deviation value is a difference value between a real value of a voltage signal output by the breeze pressure sensor and a set standard value (for example, a nominal value in a specification) when the pressure is zero.
In an alternative specific example, the determining unit 102 may be further configured to determine whether the zero offset value increases to a second setting range. The specific function and processing of the determination unit 102 are also referred to in step S220.
The zero point offset value may be determined whether or not the zero point offset value exceeds a certain setting range, and may also be determined whether or not the zero point offset value increases to a second setting range.
More optionally, the determining unit 102 determines whether a zero signal of a wind pressure sensor of the unit needs to be corrected, and may further include: determining whether it is necessary to determine whether the zero offset value increases to a second set range before determining whether the zero offset value increases to the second set range.
In a more specific alternative example, the determining unit 102 may be further configured to determine whether the zero-point deviation value is increasing after acquiring the difference between the zero-point signal and the set standard value, i.e., the zero-point deviation value, or before determining whether the zero-point deviation value is increasing to the second set range. The specific function and processing of the determination unit 102 are also referred to in step S510.
Since the zero point signal is changed, the difference between the zero point signal and the standard value, i.e., the zero point offset value, is also changed, and the zero point signal and the standard value are in one-to-one correspondence.
In a more specific alternative example, the determining unit 102 may be further configured to determine whether the zero offset value increases to the second setting range if the zero offset value increases. The specific function and processing of the determination unit 102 are also referred to in step S520.
Therefore, whether the zero offset value is increased to the second setting range is determined under the condition that the zero offset value is determined to be increased, whether the zero offset value is increased to the second setting range is judged when the zero offset value is increased so as to perform zero correction in time when needed, time and labor consumption caused by judging whether the zero offset value is increased to the second setting range for many times under the condition that the zero offset value is reduced or unchanged can be avoided, energy conservation is good, reliability is high, and improvement of efficiency and timeliness of zero correction is facilitated.
In an alternative specific example, the determining unit 102 may be further configured to modify the zero point signal if the zero point offset value increases to the second setting range. The specific function and processing of the determination unit 102 are also referred to in step S230.
For example: under the condition of power-on, when the unit of the wall-mounted furnace detects that the zero value is large to a certain range, the self-correction program of the unit is automatically started, the zero value is reset, and the unit operates according to a new linear relation.
Optionally, the determining unit 102 determines whether a zero signal of a wind pressure sensor of the unit needs to be corrected, and may further include: and determining whether zero point correction is needed according to the output signal.
In an alternative specific example, the determining unit 102 may be further configured to obtain a current output signal of the wind pressure sensor. The specific function and processing of the determination unit 102 are also referred to in step S310.
Wherein the output signal may include: and outputting at least one of the voltage signal and the current signal.
In an alternative specific example, the determining unit 102 may be further configured to determine whether the output signal is smaller than or equal to a lower limit of a third setting range or larger than or equal to an upper limit of the third setting range. The specific function and processing of the determination unit 102 are also referred to in step S320.
In an optional specific example, the determining unit 102 may be further configured to modify the zero point signal if the output signal is less than or equal to a lower limit of the third setting range or greater than or equal to an upper limit of the third setting range. The specific function and processing of the determination unit 102 are also referred to in step S330.
For example: in the case of power-on, the unit of the wall-hanging stove checks that the zero deviation value is large to a certain range (see the examples shown in fig. 7 to 10), that is, when detecting that the output electric signal (for example, the output signal of the pressure sensor, or the voltage signal output by the micro-pressure sensor signal line, which may be a voltage signal or a current signal) is not between (U0, U2), the self-correction program of the unit is automatically started, and the zero point is reset.
Optionally, the determining unit 102 determines whether a zero signal of a wind pressure sensor of the unit needs to be corrected, and may further include: and determining whether zero point correction is needed according to the correction time.
In an alternative specific example, the determining unit 102 may be further configured to determine whether the set correction time is reached. The specific function and processing of the determination unit 102 are also referred to in step S410.
In an alternative specific example, the determining unit 102 may be further configured to modify the zero signal if the modification time arrives. The specific function and processing of the determination unit 102 are also referred to step S420.
Therefore, whether zero point correction is needed or not is determined in various modes, so that the flexibility of judging the zero point correction opportunity is good, the reliability is high, the judging process is simple, and the judging result is good in accuracy.
In an optional example, the execution unit 104 may be configured to reset the zero point signal if the zero point signal needs to be corrected, so that the unit performs wind pressure control according to a new zero point signal obtained by resetting. The specific functions and processes of the execution unit 104 are shown in step S120.
For example: the zero adjusting value of the wind pressure sensor is automatically set again through main control, the influence caused by zero offset of the wind pressure sensor is eliminated, and the probability of misinformation of the unit is reduced.
For example: the unit of hanging stove carries out the self-correction of wind pressure sensor zero point signal on time or according to the condition, reduces the influence that the deviation value brought through the correction.
Therefore, when the zero point needs to be corrected, the zero point signal is reset, so that the unit carries out wind pressure control according to the new zero point signal, the influence caused by zero point offset can be reduced, and the error protection rate is reduced.
Optionally, the resetting the zero point signal by the execution unit 104 may include: and enabling the zero point signal of the wind pressure sensor to return to zero.
For example: the automatic start of the self-correcting program can be changed into manual operation. I.e. after a certain period of time, re-zeroing is performed with a manual version.
In an optional specific example, the performing unit 104 may zero the zero point signal of the wind pressure sensor, and the zero point signal may include: and electrifying the wind pressure sensor again.
Where zeroing is setting the current state to the new zero. This re-zeroing may be done in the same manner as described above for the resetting of the zero point.
For example: the manual version may be to power up again. The power-on mode can be a power-on/off mode, and the like.
In an optional specific example, the performing unit 104 makes the zero point signal of the wind pressure sensor zero, and may further include: and receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
For example: zeroing by calling other programs.
Therefore, the reset is carried out by the control of the re-electrifying or resetting module, the resetting mode is flexible and selectable, and the convenience and the reliability of the use of the user are better.
Optionally, the resetting the zero point signal by the execution unit 104 may further include: and setting the current output signal of the wind pressure sensor as a new zero signal.
For example: the self-correcting program of the unit can be as follows: when the main board detects the micro-pressure sensor, under the condition of no wind pressure, the output signal exceeds the preset range, and then the unit defaults the output voltage of the current micro-pressure sensor to be the corresponding output voltage signal at the new zero pressure according to a certain program. The new linear formula is changed to U ═ 1.23P + a, and a is the output voltage signal of the current micro-pressure sensor.
For example: for example: when the zero voltage signal is detected to be U2, the main control program automatically resets the output voltage signal at the moment to be a new zero voltage signal. The curve of the zero voltage signal will be from the initial UOutput voltage＝kx+U1Is changed into UOutput voltage＝kx+U2In this way, the unit operates in a new linear relationship.
Therefore, zero point correction is carried out in a zero resetting or new zero point signal resetting mode, so that the zero point correction mode is flexible and various, and convenience and universality in use of zero point correction are improved.
In an optional embodiment, the determining unit 102 may be further configured to, before determining whether the zero signal of the wind pressure sensor of the plant needs to be corrected, obtain, through a main board of the plant, the zero signal of the wind pressure sensor of the plant under a condition that the wind pressure sensor is powered on.
Therefore, the zero point signal is obtained through the main board of the unit, the obtaining mode is simple and convenient, and the reliability of the obtained result is high.
In an alternative embodiment, the method may further include: and a prompt unit 106. The prompting unit 106 may be configured to initiate a prompting message (e.g., a voice prompt message, an audible and visual alarm light prompt message, or a short message sent to the client) that needs to modify the zero point signal.
Therefore, the zero point correction is required to be carried out, so that a user can know the wind pressure control situation at any time, or the user can be aware of possible faults to carry out fault finding and processing because the prompt is not received, and the zero point correction method is high in reliability and good in humanization.
In an alternative embodiment, the method may further include: a display unit 108. The display unit 108 may be configured to display at least one of the zero point signal and the new zero point signal.
Therefore, zero signals before and after zero point correction are displayed, so that a user can clearly know the zero point condition in wind pressure control, and the method is strong in intuition and high in reliability.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 5, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
Through a large number of tests, the technical scheme of the invention is adopted, and under the condition of electrification, the zero value of the unit of the wall-mounted furnace is detected to be large to a certain range, then the self-correction program of the unit is automatically started, the zero point is reset, the unit operates according to a new linear relation, the influence caused by the zero point deviation value and the like can be reduced, and the protection error is reduced.
According to the embodiment of the invention, the storage medium corresponding to the wind pressure control method of the unit is also provided. The storage medium may include: the storage medium has stored therein a plurality of instructions. The instructions can be used for loading and executing the wind pressure control method of the unit by the processor.
Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 5, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
After a large number of tests, the technical scheme of the invention is adopted, when the output electric signal (for example, the output signal of the pressure sensor, or the voltage signal output by the micro-pressure sensor signal wire, which can be a voltage signal or a current signal) is detected not to be between (U0, U2), the self-correction program of the unit is automatically started, the zero point is reset, and the operation reliability of the unit is prompted.
According to the embodiment of the invention, the unit corresponding to the wind pressure control method of the unit or the wind pressure control device of the unit is also provided. The set may include: a processor and a memory, or the wind pressure control device of the machine set; optionally, a processor, operable to execute a plurality of instructions; a memory may be used to store a plurality of instructions. The instructions can be used for being stored by the memory, and loaded and executed by the processor.
Optionally, the set may include: at least one of a unit of the wall-hanging stove, a unit of the gas water heater and an air conditioner.
In an alternative embodiment, in the unit of the wall-hanging stove, the zero point of the output signal of the pressure sensor is prone to be deviated, for example:
⑴ zero point deviation of pressure value caused by the difference of installation position, for example, the wall-hanging stove itself is not installed completely vertically (for example, it cannot be installed at 90 ° to the ground, i.e. it cannot be installed completely parallel to the wall).
⑵ the inconsistency of the zero setting position of the wind pressure sensor itself causes the zero point deviation of the wind pressure value.
⑶ when the unit is used, the membrane becomes brittle after a period of time due to the material of the micro-pressure switch for sensing pressure (such as membrane of the micro-pressure switch for sensing pressure, metal spring of the micro-pressure switch for action), and the spring is stretched or extruded for a long time, the deflection and elastic coefficient change, and the material fatigue occurs, resulting in zero point deviation of the pressure value of the wind pressure.
These phenomena will directly affect the normal use of the unit, and easily trigger the related protection (for example, the air volume supply is insufficient, the error of the micro-pressure sensor itself is too large), so as to form the error protection.
In an optional implementation manner, the application of the micro-pressure sensor is more and more emphasized by the industry because the wind pressure switch cannot meet the requirement of the whole-course wind pressure protection of the fan speed change. According to the scheme, the zero adjusting value of the wind pressure sensor is automatically set again through the master control, the influence caused by zero offset of the wind pressure sensor is eliminated, and the probability of misinformation of the unit due to the zero offset is reduced.
Optionally, the unit of the wall-mounted furnace performs self-correction of the zero-point signal of the wind pressure sensor on time or according to conditions, and reduces the influence caused by the deviation value through correction.
Under the condition of power-on, when the unit of the wall-mounted furnace detects that the zero value is large to a certain range, the self-correction program of the unit is automatically started, the zero value is reset, and the unit operates according to a new linear relation.
In an alternative example, in the case of power-on, the unit of the wall-hanging stove checks that the zero deviation value is large to a certain range (see the examples shown in fig. 7 to 10), that is, when it is detected that the output electrical signal (for example, the output signal of the pressure sensor, or the voltage signal output by the signal line of the micro-pressure sensor, which may be a voltage signal or a current signal) is not between (U0, U2), the self-correction program of the unit is automatically started, and the zero point is reset.
For example: the pressure sensor has a signal output, that is, a voltage output signal of the micro-pressure sensor, for example, in a unit of the wall-hanging stove, the micro-pressure sensor outputs according to a linear formula of U1.23P +0.3, where U is an electrical signal output by the micro-pressure switch, and P is a pressure value received by the micro-pressure switch.
The zero voltage signal refers to a voltage signal output by the breeze pressure sensor at zero pressure.
The zero deviation value is a difference value between a real value of a voltage signal output by the breeze pressure sensor and a set standard value (for example, a nominal value in a specification) when the pressure is zero.
The self-correcting program of the unit can be as follows: when the main board detects the micro-pressure sensor, under the condition of no wind pressure, the output signal exceeds the preset range, and then the unit defaults the output voltage of the current micro-pressure sensor to be the corresponding output voltage signal at the new zero pressure according to a certain program. The new linear formula is changed to U ═ 1.23P + a, and a is the output voltage signal of the current micro-pressure sensor.
For example: when the zero voltage signal is detected to be U2, the main control program automatically resets the output voltage signal at the moment to be a new zero voltage signal. The curve of the zero voltage signal will be from the initial UOutput voltage＝kx+U1Is changed into UOutput voltage＝kx+U2In this way, the unit operates in a new linear relationship.
In an alternative example, the automatic initiation of the self-correction procedure may be changed to manual. I.e. after a certain period of time, re-zeroing is performed with a manual version.
Alternatively, the manual version may be a power-up again. The power-on mode can be a power-on/off mode, or the like, or a zero reset mode by calling other programs.
Where zeroing is setting the current state to the new zero. This re-zeroing may be done in the same manner as described above for the resetting of the zero point.
Since the processing and functions implemented by the unit of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to fig. 5 or the apparatus shown in fig. 6, no details are given in the description of this embodiment, and reference may be made to the related description in the foregoing embodiments, which are not repeated herein.
Through a large number of tests, the technical scheme of the invention is adopted, and after a period of time, the wind pressure control reliability of the unit is improved by resetting to zero again in a manual mode, so that the user experience is improved.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (25)
1. A wind pressure control method of a unit is characterized by comprising the following steps:
determining whether the zero point signal of the wind pressure sensor of the unit needs to be corrected, comprising the following steps: determining whether the zero point signal increases to a first set range; if the zero point signal is increased to the first set range, the zero point signal needs to be corrected;
if the zero point signal needs to be corrected, resetting the zero point signal so that the unit can carry out wind pressure control according to a new zero point signal obtained by resetting and the unit can operate according to a new linear relation; the zero point signal of the wind pressure sensor is self-corrected on time or according to conditions, and the influence caused by the deviation value is reduced through correction, so that the wind pressure switch can meet the requirement of whole-course wind pressure protection of fan speed change.
2. The method of claim 1, wherein determining whether a zero signal of a wind pressure sensor of the plant needs to be modified further comprises:
acquiring a difference value between the zero point signal and a set standard value, namely a zero point deviation value;
determining whether the zero offset value increases to a second set range;
if the zero offset value is increased to the second setting range, the zero signal needs to be corrected;
and/or the presence of a gas in the gas,
acquiring a current output signal of the wind pressure sensor;
determining whether the output signal is less than or equal to a lower limit of a third set range or greater than or equal to an upper limit of the third set range;
if the output signal is less than or equal to the lower limit of the third set range or greater than or equal to the upper limit of the third set range, the zero point signal needs to be corrected;
and/or the presence of a gas in the gas,
determining whether the set correction time is reached;
and if the correction time is up, correcting the zero point signal.
3. The method of claim 2, wherein determining whether a zero signal of a wind pressure sensor of the plant needs to be modified further comprises:
determining whether the zero offset value is increasing;
and if the zero offset value is increased, determining whether the zero offset value is increased to the second set range.
4. Method according to claim 2 or 3, characterized in that the zero signal is in particular: the wind pressure sensor outputs a signal when the wind pressure is zero;
wherein,
the output signal includes: at least one of an output voltage signal and an output current signal;
accordingly, the zero point signal includes: at least one of the zero voltage signal and the zero current signal.
5. The method of any of claims 1-3, wherein resetting the zero signal comprises:
enabling a zero point signal of the wind pressure sensor to return to zero;
or,
and setting the current output signal of the wind pressure sensor as a new zero signal.
6. The method of claim 4, wherein resetting the zero signal comprises:
enabling a zero point signal of the wind pressure sensor to return to zero;
or,
and setting the current output signal of the wind pressure sensor as a new zero signal.
7. The method of claim 5, wherein zeroing the zero signal of the wind pressure sensor comprises:
enabling the wind pressure sensor to be electrified again; and/or the presence of a gas in the gas,
and receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
8. The method of claim 6, wherein zeroing the zero signal of the wind pressure sensor comprises:
enabling the wind pressure sensor to be electrified again; and/or the presence of a gas in the gas,
and receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
9. The method of any one of claims 1-3, 6-8, further comprising:
under the condition that the wind pressure sensor is powered on, acquiring a zero point signal of the wind pressure sensor of the unit through a main board of the unit;
and/or the presence of a gas in the gas,
initiating a prompt message for correcting the zero signal;
and/or the presence of a gas in the gas,
and displaying at least one of the zero signal and the new zero signal.
10. The method of claim 4, further comprising:
under the condition that the wind pressure sensor is powered on, acquiring a zero point signal of the wind pressure sensor of the unit through a main board of the unit;
and/or the presence of a gas in the gas,
initiating a prompt message for correcting the zero signal;
and/or the presence of a gas in the gas,
and displaying at least one of the zero signal and the new zero signal.
11. The method of claim 5, further comprising:
under the condition that the wind pressure sensor is powered on, acquiring a zero point signal of the wind pressure sensor of the unit through a main board of the unit;
and/or the presence of a gas in the gas,
initiating a prompt message for correcting the zero signal;
and/or the presence of a gas in the gas,
and displaying at least one of the zero signal and the new zero signal.
12. The utility model provides a wind pressure controlling means of unit which characterized in that includes:
the determining unit is configured to determine whether a zero signal of a wind pressure sensor of the unit needs to be corrected, and specifically includes: determining whether the zero point signal increases to a first set range; if the zero point signal is increased to the first set range, the zero point signal needs to be corrected;
the execution unit is used for resetting the zero point signal if the zero point signal needs to be corrected, so that the unit can carry out wind pressure control according to a new zero point signal obtained by resetting, and the unit can operate according to a new linear relation; the zero point signal of the wind pressure sensor is self-corrected on time or according to conditions, and the influence caused by the deviation value is reduced through correction, so that the wind pressure switch can meet the requirement of whole-course wind pressure protection of fan speed change.
13. The apparatus according to claim 12, wherein the determining unit determines whether the zero signal of the wind pressure sensor of the plant needs to be corrected, and specifically includes:
acquiring a difference value between the zero point signal and a set standard value, namely a zero point deviation value;
determining whether the zero offset value increases to a second set range;
if the zero offset value is increased to the second setting range, the zero signal needs to be corrected;
and/or the presence of a gas in the gas,
acquiring a current output signal of the wind pressure sensor;
determining whether the output signal is less than or equal to a lower limit of a third set range or greater than or equal to an upper limit of the third set range;
if the output signal is less than or equal to the lower limit of the third set range or greater than or equal to the upper limit of the third set range, the zero point signal needs to be corrected;
and/or the presence of a gas in the gas,
determining whether the set correction time is reached;
and if the correction time is up, correcting the zero point signal.
14. The apparatus according to claim 13, wherein the determining unit determines whether the zero signal of the wind pressure sensor of the plant needs to be corrected, and specifically includes:
determining whether the zero offset value is increasing;
and if the zero offset value is increased, determining whether the zero offset value is increased to the second set range.
15. The device according to claim 13 or 14, characterized in that the zero signal is in particular: the wind pressure sensor outputs a signal when the wind pressure is zero;
wherein,
the output signal includes: at least one of an output voltage signal and an output current signal;
accordingly, the zero point signal includes: at least one of the zero voltage signal and the zero current signal.
16. The apparatus of one of claims 12 to 14, wherein the execution unit resets the zero signal, comprising:
enabling a zero point signal of the wind pressure sensor to return to zero;
or,
and setting the current output signal of the wind pressure sensor as a new zero signal.
17. The apparatus of claim 15, wherein the execution unit resets the zero signal, comprising:
enabling a zero point signal of the wind pressure sensor to return to zero;
or,
and setting the current output signal of the wind pressure sensor as a new zero signal.
18. The apparatus of claim 16, wherein the execution unit zeroes the zero signal of the wind pressure sensor, comprising:
enabling the wind pressure sensor to be electrified again; and/or the presence of a gas in the gas,
and receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
19. The apparatus of claim 17, wherein the execution unit zeroes the zero signal of the wind pressure sensor, comprising:
enabling the wind pressure sensor to be electrified again; and/or the presence of a gas in the gas,
and receiving a control instruction of a preset zero returning module to realize zero returning under the control of the control instruction.
20. The apparatus of any of claims 12-14, 17-19, further comprising:
the determining unit is further configured to acquire a zero signal of a wind pressure sensor of the unit through a main board of the unit when the wind pressure sensor is powered on;
and/or the presence of a gas in the gas,
the prompting unit is used for initiating a prompting message which needs to correct the zero signal;
and/or the presence of a gas in the gas,
and the display unit is used for displaying at least one of the zero-point signal and the new zero-point signal.
21. The apparatus of claim 15, further comprising:
the determining unit is further configured to acquire a zero signal of a wind pressure sensor of the unit through a main board of the unit when the wind pressure sensor is powered on;
and/or the presence of a gas in the gas,
the prompting unit is used for initiating a prompting message which needs to correct the zero signal;
and/or the presence of a gas in the gas,
and the display unit is used for displaying at least one of the zero-point signal and the new zero-point signal.
22. The apparatus of claim 16, further comprising:
the determining unit is further configured to acquire a zero signal of a wind pressure sensor of the unit through a main board of the unit when the wind pressure sensor is powered on;
and/or the presence of a gas in the gas,
the prompting unit is used for initiating a prompting message which needs to correct the zero signal;
and/or the presence of a gas in the gas,
and the display unit is used for displaying at least one of the zero-point signal and the new zero-point signal.
23. A storage medium, comprising: the storage medium has stored therein a plurality of instructions;
wherein the instructions are used for loading and executing the wind pressure control method of the unit according to any one of claims 1 to 11 by the processor.
24. An assembly, comprising:
a processor for executing a plurality of instructions;
a memory to store a plurality of instructions;
wherein the instructions are stored in the memory, loaded by the processor and used for executing the wind pressure control method of the unit according to any one of claims 1 to 11;
or,
a wind pressure control apparatus according to any one of claims 12 to 22.
25. The aggregate according to claim 24, characterized in that it comprises: at least one of a unit of the wall-hanging stove, a unit of the gas water heater and an air conditioner.
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| CN201710780977.3A CN107703843B (en) | 2017-09-01 | 2017-09-01 | Wind pressure control method and device of unit, storage medium and unit |
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| JP4110908B2 (en) * | 2002-10-02 | 2008-07-02 | 松下電器産業株式会社 | Gas shut-off device |
| CN101655406A (en) * | 2009-09-11 | 2010-02-24 | 中国铁道科学研究院机车车辆研究所 | Method and device for zero point calibration of gas pressure sensor |
| CN104632444B (en) * | 2013-11-07 | 2017-01-04 | 北汽福田汽车股份有限公司 | The modification method of accelerator pedal transducing signal and device |
| CN104879228B (en) * | 2015-06-12 | 2019-02-12 | 潍柴动力股份有限公司 | A kind of null offset adaptive approach of engine pressure sensor |
| CN105222362B (en) * | 2015-10-29 | 2018-03-16 | 艾欧史密斯(中国)热水器有限公司 | The control system of gas-fired water heater |
| CN105610353B (en) * | 2016-01-15 | 2018-01-12 | 北京工业大学 | A kind of brshless DC motor quick start method of the short-time pulse based on position-sensor-free |
| CN106092375B (en) * | 2016-08-24 | 2018-11-13 | 南京飞利宁航空科技发展有限公司 | The method of calibration and tester of airborne equipment surface temperature sensor |
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