CN115507485B - Control method of fresh air system and fresh air system - Google Patents
Control method of fresh air system and fresh air system Download PDFInfo
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- CN115507485B CN115507485B CN202211156363.5A CN202211156363A CN115507485B CN 115507485 B CN115507485 B CN 115507485B CN 202211156363 A CN202211156363 A CN 202211156363A CN 115507485 B CN115507485 B CN 115507485B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000001276 controlling effect Effects 0.000 claims description 46
- 230000000875 corresponding effect Effects 0.000 claims description 33
- 230000003068 static effect Effects 0.000 claims description 31
- 238000007689 inspection Methods 0.000 claims description 13
- 238000012806 monitoring device Methods 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000002596 correlated effect Effects 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Ventilation (AREA)
Abstract
The invention provides a control method of a fresh air system and the fresh air system, relates to the technical field of the fresh air system, and solves the technical problem that the whole fresh air system cannot work normally if the fresh air unit is in a problem because the traditional fresh air system generally comprises the fresh air unit in the prior art. The control method comprises the following steps: judging whether each fresh air unit in the fresh air system has a faulty unit, if so, controlling the fresh air unit which does not have the fault to send fresh air to the compartment corresponding to the faulty fresh air unit. If no fault exists in each fresh air unit in the fresh air system, whether the working conditions of part of the fresh air units are met is still judged, if yes, the part of the fresh air units are controlled to work so that the working fresh air units send fresh air to compartments which are responsible for the non-working fresh air units, and therefore energy consumption is fully reduced. The air supply quantity of the fresh air unit can be automatically adjusted according to the quantity of personnel in the compartment, so that energy waste is avoided.
Description
Technical Field
The invention relates to the technical field of fresh air systems, in particular to a control method of a fresh air system and the fresh air system.
Background
The total energy consumption of the building is 30% of the total energy consumption of the society, the energy consumption of the central air conditioner is 65% of the total energy consumption of the building, and the energy consumption from the central air conditioner to the cold energy consumption is about 70% of the energy consumption of an air conditioning system in the south China. In order to keep the comfort of indoor environment and the health of personnel, fresh air needs to be introduced into the room, and the energy consumption of the fresh air treatment process is huge.
Referring to fig. 1, most of the fresh air units in the conventional fan coil and fresh air adding system are arranged in a concentrated manner, and a fresh air unit is used for cooling a layer of room, so that the problems of overlong fresh air pipes, increased conveying resistance of wind, overlarge fresh air pipe wells and the like are caused.
Because the room types are diversified, the use habits are different, and the difficulty of regulating and controlling a single room by the traditional centrally arranged fresh air handling unit is high. In addition, the traditional fresh air system is often a constant air volume system, the fresh air volume of a room cannot be changed along with the change of personnel, the air supply system has no adjustability, and the waste of energy sources can be caused.
Disclosure of Invention
The invention aims to provide a control method of a fresh air system and the fresh air system, which solve the technical problem that the whole fresh air system cannot work normally if the fresh air unit is in a problem because the traditional fresh air system in the prior art generally comprises the fresh air unit. The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a control method of a fresh air system, which comprises the following steps: judging whether each fresh air unit in the fresh air system has a faulty unit, if so, controlling the fresh air unit which does not have the fault to send fresh air to the compartment corresponding to the faulty fresh air unit;
If no fault exists in each fresh air unit in the fresh air system, whether the working conditions of part of the fresh air units are met is still judged, and if yes, the part of the fresh air units are controlled to work so that the working fresh air units send fresh air to compartments responsible for the fresh air units which do not work.
The judging whether the working conditions of part of fresh air handling units are met or not comprises the following steps: judging whether one fresh air unit exists, wherein the number of preset responsible personnel of the fresh air unit is larger than the total number of more than two compartments responsible by the fresh air unit.
Further, judging whether the preset number of responsible personnel of the fresh air handling unit is not less than the total number of compartments responsible by the fresh air handling units; if yes, controlling one fresh air handling unit to work.
Further, when the fresh air system includes two fresh air units and rated air volumes of the fresh air units are the same, the fresh air unit is controlled to work, and the fresh air unit specifically includes the following contents: monitoring the real-time total number of the compartments respectively responsible for each fresh air handling unit; and controlling the real-time total number of the compartments to be not smaller than the work of a fresh air handling unit of the real-time total number of the compartments in charge of the other fresh air handling unit.
Further, when the fresh air system includes two fresh air units and rated air volumes of the fresh air units are different, the fresh air unit is controlled to work, and the fresh air unit specifically includes the following contents:
Controlling the fresh air handling unit with large rated air quantity to work; or alternatively
If the total number of the compartments in charge of each fresh air unit is smaller than the preset number of the fresh air unit with large rated air volume but not smaller than the number corresponding to the lower limit of the air volume adjustment of the fresh air unit with large rated air volume, controlling the fresh air unit with large rated air volume to work;
and if the total number of the compartments in charge of each fresh air unit is smaller than the number corresponding to the lower limit of the air quantity regulation of the fresh air unit with large rated air quantity, controlling the fresh air unit with small rated air quantity to work.
Further, the fresh air conveying pipelines of the fresh air units are connected through fresh air connecting pipelines, the return air pipelines of the fresh air units are connected through return air connecting pipelines, and control valves are arranged on the fresh air connecting pipelines and the return air connecting pipelines; when the fresh air unit works fully, the opening of the control valve and the opening of the tail end fresh air valve in the fresh air system can be controlled according to the number of personnel in each compartment.
Further, the fresh air system comprises a first fresh air unit for sending fresh air to a single compartment and a second fresh air unit for sending fresh air to more than two compartments, wherein the compartment responsible for the first fresh air unit is called a first area, and the compartment responsible for the second fresh air unit is called a second area; the fresh air conveying pipelines of the first fresh air unit and the second fresh air unit are connected through a fresh air connecting pipeline, the return air pipelines of the first fresh air unit and the second fresh air unit are connected through a return air connecting pipeline, control valves are arranged on the fresh air connecting pipeline and the return air connecting pipeline, each compartment of the second area corresponds to more than one tail end fresh air valve of the second fresh air unit, and more than one air supply opening is arranged on the fresh air conveying pipeline of the first fresh air unit; and if one of the two fresh air units fails, controlling the control valve to be opened.
Further, when the first fresh air handling unit is only responsible for supplying fresh air to the first area, the number of people in the first area is monitored, and when the number of people in the first area changes, the fan of the first fresh air handling unit is controlled to be modulated to a corresponding preset frequency value.
Further, when the first fresh air handling unit is responsible for simultaneously delivering fresh air to the first area and the second area: judging whether the number of people in the first area and the second area is not smaller than a first preset responsible person number N b or not; if yes, adjusting the fan frequency of the first fresh air unit to the maximum value, and opening each tail fresh air valve and the control valve to the set maximum opening; and if not, controlling the tail end fresh air valves and controlling the opening of the control valves according to the number of the personnel in each compartment.
Further, when the second fresh air handling unit is only responsible for fresh air supply in the second area: judging whether the personnel number of the second area is not less than a second preset responsible personnel number N a; if yes, the fan frequency of the second fresh air unit is adjusted to the maximum value, and each tail end fresh air valve of the second fresh air unit is opened to the set maximum opening; and if not, controlling the opening degree of each tail end fresh air valve according to the number of the personnel in each compartment.
Further, when the second fresh air handling unit is responsible for simultaneously delivering fresh air to the second area and the first area: judging whether the personnel number of the second area and the first area is not less than a second preset responsible personnel number N a; if yes, the fan frequency of the second fresh air unit is adjusted to the maximum value, and all the tail end fresh air valves and the control valves of the second fresh air unit are opened to the set maximum opening; and if not, controlling the tail end fresh air valves and controlling the opening of the control valves according to the number of the personnel in each compartment.
Further, the set maximum opening of each end fresh air valve is positively correlated with the number of preset personnel in the matched compartment.
Further, detecting a static pressure value of a fresh air supply header pipe of the fresh air unit; if the static pressure value is lower than a preset static pressure value, controlling the frequency of a fresh air fan of the fresh air unit to be increased; and if the static pressure value is higher than a preset static pressure value, controlling the frequency of the fresh air fan of the fresh air unit to be reduced.
Further, the frequency of the fresh air fan and the frequency of the return air fan of the fresh air unit are controlled to synchronously change.
The invention provides a fresh air system which comprises more than two fresh air units, wherein fresh air conveying pipelines of the fresh air units are connected through fresh air connecting pipelines, return air pipelines of the fresh air units are connected through return air connecting pipelines, and control valves are arranged on the fresh air connecting pipelines and the return air connecting pipelines.
Further, the fresh air system further comprises a personnel quantity inspection device connected with the fresh air system controller, the personnel quantity inspection device is an infrared monitoring device or a carbon dioxide concentration detection device, each room in charge of the fresh air unit is provided with the personnel quantity inspection device, and the controller can control the tail end fresh air valve and the opening of the control valve through signals of the personnel quantity inspection device.
Further, a static pressure sensor connected with the fresh air system controller is arranged in a fresh air supply header pipe of the fresh air unit, and the controller can control the running frequency of the fan of the fresh air unit through signals of the static pressure sensor.
Further, the new trend system is including the first new trend unit that is used for single room to send new trend and the second new trend unit that is used for more than two rooms to send new trend, the terminal new trend valve of second new trend unit cooperates with the room that corresponds respectively, set up more than one supply-air outlet on the new trend pipeline of first new trend unit.
The invention provides a control method of a fresh air system, which comprises the following steps: judging whether each fresh air unit in the fresh air system has a faulty unit, if so, controlling the fresh air unit which does not have the fault to send fresh air for a compartment corresponding to the faulty fresh air unit at the same time, and solving the technical problem that the whole fresh air system cannot work normally if the fresh air unit has a problem because the traditional fresh air system generally comprises one fresh air unit in the prior art.
If no fault exists in each fresh air unit in the fresh air system, whether the working conditions of part of the fresh air units are met is still judged, if yes, the part of the fresh air units are controlled to work so that the working fresh air units send fresh air to compartments which are responsible for the non-working fresh air units, and therefore energy consumption is fully reduced.
The preferred technical scheme of the invention can at least have the following technical effects:
the air supply quantity of the fresh air unit can be automatically adjusted according to the quantity of personnel in the compartment, so that energy waste is avoided.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a conventional fresh air system arranged in an interior compartment of a building;
FIG. 2 is a schematic view of a fresh air system according to an embodiment of the present invention disposed in a building room;
FIG. 3 is a schematic view of a second fresh air handling unit of the fresh air system according to an embodiment of the present invention disposed in a building room;
FIG. 4 is a schematic view of a first fan set of a fresh air system according to an embodiment of the present invention disposed in a building room;
FIG. 5 is a schematic diagram of four fresh air systems according to an embodiment of the present invention disposed in a compartment within a floor of a building.
101-A compartment in which a traditional fresh air system is arranged; 102-a fresh air machine room; 103-a fresh air pipe well; 104-a fresh air unit of a traditional fresh air system; 105-a fresh air pipeline of a traditional fresh air system; 106-a fresh air supply port of a traditional fresh air system;
201-a compartment in which a second fresh air handling unit is arranged; 202-a second fresh air unit; 203-an outdoor fresh air supply pipe; 204-a fresh air port; 205-a fresh air conveying pipeline; 206-an air supply port; 207-an electric air valve of a second fresh air unit; 208-exhaust pipe; 209-an exhaust outlet; 210-a return air pipeline; 211-an air return port; 212-an infrared monitoring device; 213-a second hydrostatic sensor; 214-a return air first electric control air valve; 215-a return air second electric air valve; 216-fresh air first electric air valve; 217-a fresh air second electric air valve; 218-a compartment in which a first fresh air bank is arranged; 219-a first fresh air handling unit; 220-first static pressure sensor.
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 described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
A control method of a fresh air system comprises the following steps: judging whether each fresh air unit in the fresh air system has a faulty unit, if so, controlling the fresh air unit which does not have the fault to send fresh air for a compartment corresponding to the faulty fresh air unit at the same time, and solving the technical problem that the whole fresh air system cannot work normally if the fresh air unit has a problem because the traditional fresh air system generally comprises one fresh air unit in the prior art.
Taking a fresh air system comprising two fresh air units as an example: the control method specifically comprises the steps of judging whether two fresh air units have faults or not, and if one of the two fresh air units has faults, controlling the fresh air units which do not have faults to send fresh air to the compartments corresponding to the failed fresh air units at the same time. That is, two fresh air units can be mutually standby, if one of the two fresh air units has a fault, the fresh air unit which does not have the fault is controlled to send fresh air to the compartment corresponding to the faulty fresh air unit at the same time,
The control method also comprises the following steps: if no fault exists in each fresh air unit in the fresh air system, whether the working conditions of part of the fresh air units are met is still judged, if yes, the part of the fresh air units are controlled to work so that the working fresh air units send fresh air to compartments which are responsible for the non-working fresh air units, and therefore energy consumption is fully reduced.
Judging whether the working conditions of part of fresh air handling units are met or not, wherein the working conditions comprise the following contents: judging whether a fresh air unit exists or not, wherein the number of preset responsible personnel of the fresh air unit is larger than the total number of compartments responsible by more than two fresh air units. For example, when the fresh air system includes three fresh air units, if the preset number of responsible persons of one fresh air unit (called fresh air unit A) is greater than the total number of compartments responsible for two fresh air units (the two fresh air units are a fresh air unit A and a fresh air unit B respectively), the two fresh air units of the fresh air system can be controlled to work, and the fresh air unit A supplies fresh air for the fresh air unit A and the fresh air unit B simultaneously.
Or judging whether the working conditions of part of fresh air handling units are met, wherein the working conditions comprise the following contents: judging whether a preset number of responsible personnel of the fresh air handling units is not less than the total number of compartments responsible by the fresh air handling units, and if yes, controlling one fresh air handling unit to work.
When the fresh air system comprises two fresh air units and rated air quantity of each fresh air unit is the same, one fresh air unit is controlled to work, and the fresh air system specifically comprises the following contents: monitoring the real-time total number of the rooms in charge of each fresh air handling unit respectively; the real-time total number of the control room is not less than the work of the fresh air handling unit of the real-time total number of the room in charge of the other fresh air handling unit.
When the fresh air system comprises two fresh air units and rated air quantities of the fresh air units are different, one fresh air unit is controlled to work, and the fresh air system specifically comprises the following contents:
Controlling a fresh air unit with large rated air quantity to work; or alternatively
If the total number of the compartments in charge of each fresh air unit is smaller than the preset number of the fresh air unit with large rated air volume but not smaller than the number corresponding to the lower limit of the air volume adjustment of the fresh air unit with large rated air volume, controlling the fresh air unit with large rated air volume to work; and if the total number of the compartments in charge of each fresh air unit is smaller than the number corresponding to the lower limit of the air quantity regulation of the fresh air unit with large rated air quantity, controlling the fresh air unit with small rated air quantity to work.
When the rated air quantity of each fresh air unit is different, the fresh air unit with large rated air quantity is controlled to work, so that frequent switching of the units can be effectively avoided. When rated air quantity of each fresh air unit is the same, the total number of compartments responsible for each fresh air unit is monitored, and the operation of the fresh air units with relatively more total number of compartments is controlled, so that the regulation and control of the fresh air units are more convenient, and especially when the total number of compartments responsible for one fresh air unit is reduced to 0, the other fresh air unit can be controlled to only provide fresh air for the area responsible for the other fresh air unit.
The concrete explanation is as follows: the fresh air handling unit for supplying fresh air to a single compartment is called a first fresh air handling unit 219, the fresh air handling units for supplying fresh air to more than two compartments are second fresh air handling units 202, the number of responsible persons preset by the first fresh air handling unit 219 is N b, the number of responsible persons preset by the second fresh air handling unit 202 is N a, and here, it is to be noted that if the rated air volumes of the two fresh air handling units are the same, then N a＝Nb is provided, and if the rated air volume of one fresh air handling unit is greater than the rated air volume of the other fresh air handling unit, then the corresponding preset responsible persons with large rated air volume are more.
When the rated air quantity of the two fresh air units is the same (N a＝Nb), and the two fresh air units are both under the condition of no fault:
If the number of the compartments responsible for the first fresh air unit 219 is N 1, the number of the compartments responsible for the second fresh air unit 202 is N 2 and N 1+N2<Na、N1>N2, controlling the first fresh air unit to work;
if the number of the compartments responsible for the first fresh air unit 219 is N 1, the number of the compartments responsible for the second fresh air unit 202 is N 2 and N 1+N2<Na、N2>N1, controlling the second fresh air unit to work;
If the number of the compartments responsible for the first fresh air group 219 is N 1, the number of the compartments responsible for the second fresh air group 202 is N 2 and N 1+N2<Na、N2＝N1, the first fresh air machine is controlled to work or the second fresh air machine is controlled to work.
When the rated air volumes of the two fresh air units are different (for example, the rated air volume of the first fresh air unit 219 is greater than the rated air volume of the second fresh air unit 202, N b>Na), and both are under the condition of no fault: if the number of the compartments responsible for the first fresh air group 219 is N 1, and the number of the compartments responsible for the second fresh air group 202 is N 2 and N 1+N2<Nb, the first fresh air group is controlled to work.
The rated air quantity of the two fresh air units is different, and the two fresh air units can be controlled as follows: the rated air volume of the first fresh air unit 219 is larger than that of the second fresh air unit 202, the preset responsible number of the first fresh air unit 219 is N b, the corresponding number of the air volume adjusting lower limit is N X1 and the responsible real-time total number of compartments N 1, the preset responsible number of the second fresh air unit 202 is N a, the corresponding number of the air volume adjusting lower limit is N X2 and the responsible real-time total number of compartments N 2,
If N x1≤N1+N2<Nb is the same, controlling the fresh air handling unit with large rated air quantity to work;
and when N 1+N2<Nx1 is reached, controlling the fresh air handling unit with small rated air quantity to work.
Regarding the number of people corresponding to the lower limit of the air quantity adjustment, the fans of the fresh air handling unit are all corresponding to the lowest frequency, the lowest frequency is corresponding to the lower limit air quantity, the number of people and the fresh air quantity are positively correlated, and the lower limit of the air quantity adjustment is also corresponding to the set number of people.
When the two fresh air units are in a non-fault state, if the number of the compartments responsible for the first fresh air unit 219 is N 1, and the number of the compartments responsible for the second fresh air unit 202 is N 2 and N 1+N2>Na、 N1+N2>Nb, the two fresh air units are controlled to work.
The fresh air conveying pipelines of the fresh air units are connected through fresh air connecting pipelines, the return air pipelines of the fresh air units are connected through return air connecting pipelines, and control valves are arranged on the fresh air connecting pipelines and the return air connecting pipelines; when the fresh air unit works fully, the opening of the control valve and the opening of the tail end fresh air valve in the fresh air system can be controlled according to the number of staff in each compartment, so that the energy consumption of the system is reduced on the premise that the fresh air requirement of each compartment is met.
When the fresh air system comprises two fresh air units, specifically, the fresh air system comprises a first fresh air unit for sending fresh air to a single compartment and a second fresh air unit for sending fresh air to more than two compartments, wherein the compartment responsible for the first fresh air unit is called a first area, and the compartment responsible for the second fresh air unit is called a second area; the fresh air conveying pipelines 205 of the first fresh air unit 219 and the second fresh air unit 202 are connected through fresh air connecting pipelines, the return air pipelines 210 of the first fresh air unit 219 and the second fresh air unit 202 are connected through return air connecting pipelines, control valves are arranged on the fresh air connecting pipelines and the return air connecting pipelines, each compartment of the second area corresponds to the tail end fresh air valve of more than one second fresh air unit 202, and more than one air supply opening is arranged on the fresh air conveying pipeline of the first fresh air unit 219; and if one of the two fresh air units fails, the control valve is controlled to be opened. For the setting condition of two fresh air handling units, when the area of compartment is great, can set up a fresh air handling unit, when a plurality of compartment areas are all less relatively, can share a fresh air handling unit.
Referring to fig. 2, an embodiment of the fresh air system provided by the present invention is illustrated:
Fig. 4 illustrates the first fresh air handling unit 219, and also illustrates the outdoor fresh air supply duct 203, the exhaust duct 208, the return air duct 210, and the fresh air duct 205, since the first fresh air handling unit 219 is used for one compartment, more than one supply port may be provided on the fresh air duct 205 of the first fresh air handling unit 219 without providing a damper.
Fig. 3 illustrates the second fresh air handling unit 202, and simultaneously illustrates the outdoor fresh air supply duct 203, the exhaust duct 208, the return air duct 210 and the fresh air delivery duct 205, wherein each compartment in the second area corresponds to one return air inlet, each compartment in the second area corresponds to one air supply inlet, and the air supply inlet 206 is provided with an electric air valve 207 of the second fresh air handling unit.
When the area of the compartment is larger, a fresh air handling unit can be arranged, and when the areas of the compartments are relatively smaller, the fresh air handling units can be shared. Referring to FIG. 2, a first fresh air handling unit 219 is shown applied to a compartment 218 in which a first fresh air handling unit having a relatively large area is disposed, and a second fresh air handling unit 202 is shown applied to four compartments having a relatively small area.
In fig. 2, the fresh air conveying pipelines 205 of the first fresh air unit 219 and the second fresh air unit 202 are schematically connected through fresh air connecting pipelines, a fresh air first electric air valve 216 and a fresh air second electric air valve 217 are arranged on the fresh air connecting pipelines, the return air pipelines 210 of the first fresh air unit 219 and the second fresh air unit 202 are connected through return air connecting pipelines, and return air first electric air valves 214 and return air second electric air valves 215 are arranged on the return air connecting pipelines. When one of the first fresh air unit 219 and the second fresh air unit 202 is in a working state, the fresh air first electric air valve 216, the fresh air second electric air valve 217, the return air first electric air valve 214 and the return air second electric air valve 215 are controlled to be opened; when the first fresh air unit 219 and the second fresh air unit 202 are both in the working state, the fresh air first electric air valve 216, the fresh air second electric air valve 217, the return air first electric air valve 214 and the return air second electric air valve 215 are controlled to be closed.
Referring to fig. 1, most of the fresh air units in the conventional fan coil and fresh air adding system are arranged in a concentrated manner, and a fresh air unit is used for cooling a layer of room, so that the problems of overlong fresh air pipes, increased conveying resistance of wind, overlarge fresh air pipe wells and the like are caused. The fresh air system shortens the fresh air conveying distance, reduces the conveying resistance of the fresh air and improves the energy efficiency; the fresh air inlet and the air outlet are arranged nearby, a fresh air well is omitted, a fresh air unit can be arranged in a building beam, a fresh air machine room is omitted, and the available area of a building is increased. Referring to fig. 5, four sets of fresh air systems provided by the present invention may be provided for one floor of a building.
An infrared monitoring device 212 (the infrared monitoring device 212 may be replaced by a carbon dioxide concentration detecting device) is disposed in all the rooms in charge of the first fresh air handling unit 219 and the second fresh air handling unit 202, for monitoring the number of people in the rooms. The number of detected personnel is N, and the number of the personnel N and the fresh air quantity q are in positive correlation, namelyWherein, X is the minimum fresh air quantity required by each person per hour, X is determined according to the room type (such as area), and θ is a coefficient value, for example, the coefficient value can be 1.05. After the fresh air system is installed, the valve opening corresponding to different air supply amounts q can be determined through debugging, and the valve opening corresponding to different personnel numbers N can be obtained.
When the first new fan set 219 is only responsible for sending fresh air in the first area, the number of people in the first area is monitored, and when the number of people in the first area changes, the fans of the first new fan set 219 are controlled to be modulated to corresponding preset frequency values. The description is as follows:
The frequency of the fresh air quantity conveyed by the first fresh air fan group 219 is related to the frequency of the fresh air fans, and the frequency value of the fresh air fans corresponding to the number of different people can be set. The infrared monitoring device 212 feeds back the related parameter condition once every T seconds (for example, T can take the value 600), when detecting that the number of people changes, the fans of the first new fan group 219 are subjected to frequency modulation, and at this time, the return air fans of the first new fan group 219 are subjected to synchronous frequency modulation, so that the same-frequency operation of the fresh air fans and the return air fans is always maintained.
When the first fresh air group 219 is responsible for supplying fresh air to both the first and second areas: judging whether the number of people in the first area and the second area is not smaller than the first preset responsible person number N b; if so, the fan frequency of the first new fan set 219 is adjusted to the maximum value, and each tail fresh air valve and each control valve are opened to the set maximum opening; if not, controlling the opening of each tail end fresh air valve and the control valve according to the number of each compartment personnel. The following is described in connection with fig. 2:
When the first fresh air unit 219 is responsible for supplying fresh air to the first area and the second area at the same time, the first fresh air first electric air valve 216 and the second fresh air second electric air valve 217 are controlled to be opened, so that fresh air energy of the first fresh air unit 219 is delivered to a room in which the second fresh air unit 202 is responsible. Simultaneously, the first electric control air valve 214 and the second electric air valve 215 are opened, so that the return air in the room in charge of the second fresh air unit 202 is conveyed to the first fresh air unit 219, and the stability of the basic pressure of the room is ensured.
If the number of persons in charge of the first fresh air unit 219 is N b, if the number of persons in charge of the first fresh air unit 219 is N 1, and the number of persons in charge of the second fresh air unit 202 is N 2 and N 1+N2≥Nb, the fan frequency of the first fresh air unit 219 is maximized, the end fresh air valves (the fresh air first electric air valve 216) are opened to the set maximum opening, and the fresh air first electric air valve 216 and the fresh air second electric air valve 217 are opened to the set maximum opening. The set maximum opening of each terminal fresh air valve is positively correlated with the preset personnel number of the matched compartment, each compartment in the second area corresponds to the preset responsible personnel number, and when the personnel number of the compartment exceeds the preset responsible personnel number, the terminal fresh air valve matched with the compartment is controlled to be opened to the set maximum opening.
If the number of the compartments responsible for the first fresh air group 219 is monitored to be N 1, and the number of the compartments responsible for the second fresh air group 202 is monitored to be N 2 and N 1+N2<Nb, the opening of each terminal fresh air valve is adjusted according to the number of the compartments, wherein the fresh air second electric air valve 217 is adjusted according to the feedback number of N 2, and the fresh air first electric air valve 216 is fully opened.
The first static pressure sensor 220 is used for monitoring the static pressure condition of the fresh air supply main pipe, and the first fresh air fan group 219 fans adjust the frequency according to the static pressure. When the pressure signal fed back by the first static pressure sensor 220 is lower than the set value, the fan frequency of the first new fan group 219 increases; when the pressure signal fed back by the first static pressure sensor 220 is higher than the set value, the fresh air fan frequency of the first fresh air fan group 219 is reduced. When the frequency of the fresh air fan changes, the frequency of the return air fan synchronously changes, and the same-frequency operation of the fresh air fan and the return air fan is always maintained.
When the second fresh air handling unit 202 is only responsible for delivering fresh air in the second area: judging whether the personnel number of the second area is not less than a second preset responsible personnel number N a; if yes, the fan frequency of the second fresh air unit 202 is adjusted to the maximum value, and the fresh air valves at the tail ends of the second fresh air unit 202 are opened to the set maximum opening; if not, controlling the opening of the corresponding tail end fresh air valve according to the number of staff in each compartment. The following is described in connection with fig. 2:
The infrared monitoring device 212 feeds back relevant parameter conditions every T seconds (for example, T can take the value of 600), and when the number of people changes, the tail end fresh air valve can be timely adjusted, so that the requirement of indoor people on fresh air is met, and additional waste is avoided. When the number of people in the second area is not less than the second preset responsible number of people N a, opening each tail end fresh air valve of the second fresh air unit 202 to a set maximum opening, wherein the set maximum opening of each tail end fresh air valve is positively related to the preset number of people in the matched compartment; when the number of people in the second area is smaller than the second preset responsible personnel number N a, the opening degree of each tail end fresh air valve is controlled through the number of people in each room. The second static pressure sensor 213 is used for monitoring the static pressure condition of the fresh air supply header pipe, and the frequency of the fan of the second fresh air unit 202 is adjusted according to the static pressure. When the pressure signal fed back by the second static pressure sensor 213 is lower than a set value, the frequency of the fresh air fan of the second fresh air unit 202 is increased; when the pressure signal fed back by the second static pressure sensor 213 is higher than the set value, the fresh air fan frequency of the second fresh air unit 202 is reduced. When the frequency of the fresh air fan changes, the frequency of the return air fan synchronously changes, and the same-frequency operation of the fresh air fan and the return air fan is always maintained.
When the second fresh air handling unit 202 is responsible for supplying fresh air to the second area and the first area at the same time: judging whether the personnel number of the second area and the first area is not less than a second preset responsible personnel number N a; if yes, the fan frequency of the second fresh air unit 202 is adjusted to the maximum value, and the fresh air valves and the control valves at the tail ends of the second fresh air unit 202 are opened to the set maximum opening; if not, controlling the opening of the tail fresh air valve and the control valve according to the number of staff in each compartment. The following is described in connection with fig. 2:
When the second fresh air unit 202 is responsible for supplying fresh air to the second area and the first area at the same time, the fresh air first electric air valve 216 and the fresh air second electric air valve 217 are controlled to be opened, so that fresh air energy of the second fresh air unit 202 is delivered into a room in charge of the first fresh air unit 219. Simultaneously, the first electric control air valve 214 and the second electric air valve 215 are opened, so that the return air in the room in charge of the first fresh air unit 219 is conveyed to the second fresh air unit 202, and the stability of the basic pressure of the room is ensured.
And if the number of responsible persons preset by the second fresh air unit 202 is N a, and the number of responsible compartments of the first fresh air unit 219 is N 1, and the number of responsible compartments of the second fresh air unit 202 is N 2 and N 1+N2≥Na, the fan frequency of the second fresh air unit 202 is regulated to the maximum, the fresh air valves at the tail ends are all opened to the set maximum opening, and the fresh air first electric air valve 216 and the fresh air second electric air valve 217 are all opened to the set maximum opening. The set maximum opening of each tail end fresh air valve is positively correlated with the number of preset personnel in the matched compartment.
If the number of the compartments responsible for the first fresh air group 219 is monitored to be N 1, and the number of the compartments responsible for the second fresh air group 202 is monitored to be N 2 and N 1+N2<Na, the opening of each terminal fresh air valve is adjusted according to the corresponding number of the compartments, wherein the fresh air first electric air valve 216 is adjusted according to the feedback number of N 1, and the fresh air second electric air valve 217 is fully opened. The second static pressure sensor 213 is used for monitoring the static pressure condition of the fresh air supply header pipe, and the frequency of the fan of the second fresh air unit 202 is adjusted according to the static pressure. When the pressure signal fed back by the second static pressure sensor 213 is lower than a set value, the frequency of the fresh air fan of the second fresh air unit 202 is increased; when the pressure signal fed back by the second static pressure sensor 213 is higher than the set value, the fresh air fan frequency of the second fresh air unit 202 is reduced. When the frequency of the fresh air fan changes, the frequency of the return air fan synchronously changes, and the same-frequency operation of the fresh air fan and the return air fan is always maintained.
The utility model provides a new trend system, includes more than two fresh air handling units, and wherein, the new trend pipeline of each fresh air handling unit is connected through new trend connecting tube, and the return air pipeline of each fresh air handling unit is connected through the return air connecting tube, and all sets up the control valve on new trend connecting tube and the return air connecting tube. If a faulty unit exists in the fresh air system, the fresh air unit which is not faulty is controlled to send fresh air to the compartment corresponding to the faulty fresh air unit, and the technical problem that the whole fresh air system cannot work normally if the fresh air unit is out of order is solved.
Specifically, the fresh air system includes a first fresh air unit 219 for sending fresh air to a single compartment and a second fresh air unit 202 for sending fresh air to more than two compartments, wherein fresh air conveying pipelines of the first fresh air unit 219 and the second fresh air unit 202 are connected through fresh air connecting pipelines, return air pipelines of the first fresh air unit 219 and the second fresh air unit are connected through return air connecting pipelines, control valves are arranged on the fresh air connecting pipelines and the return air connecting pipelines, tail end fresh air valves of the second fresh air unit 202 are respectively matched with corresponding compartments, and more than one air supply opening is arranged on the fresh air conveying pipeline of the first fresh air unit 219. The fresh air system provided by the invention comprises two fresh air units, wherein the two fresh air units can be mutually standby, and if one of the two fresh air units fails, the fresh air unit which does not fail is controlled to send fresh air to a compartment corresponding to the failed fresh air unit.
Referring to fig. 1, most of the fresh air units in the conventional fan coil and fresh air adding system are arranged in a concentrated manner, and a fresh air unit is used for cooling a layer of room, so that the problems of overlong fresh air pipes, increased conveying resistance of wind, overlarge fresh air pipe wells and the like are caused. The fresh air system shortens the fresh air conveying distance, reduces the conveying resistance of the fresh air and improves the energy efficiency; the fresh air inlet and the air outlet are arranged nearby when the layer, a fresh air well is eliminated, the fresh air unit can be arranged in a building beam (or made into a vertical type to be placed in a corner of a room), a fresh air machine room is eliminated, and the usable area of a building is increased. Referring to fig. 5, four sets of fresh air systems provided by the present invention may be provided for one floor of a building.
The fresh air system further comprises a personnel quantity inspection device connected with the fresh air system controller, wherein the personnel quantity inspection device is an infrared monitoring device or a carbon dioxide concentration detection device, each room is provided with a personnel quantity inspection device, and the controller can control the opening of the tail end fresh air valve and the control valve through signals of the personnel quantity inspection device. After the fresh air system is installed, the valve opening corresponding to different air supply amounts q can be determined through debugging, and the valve opening corresponding to different personnel numbers N can be obtained.
In addition, when the personnel quantity inspection device is an infrared monitoring device, the infrared monitoring device can synchronously perform night light regulation and control.
A static pressure sensor connected with a fresh air system controller is arranged in a fresh air supply header pipe of the fresh air unit, and the controller can control the running frequency of a fan of the fresh air unit through signals of the static pressure sensor. Referring to FIG. 2, a first hydrostatic sensor 220 and a second hydrostatic sensor 213 are illustrated, when the hydrostatic sensor feedback pressure signal is below a set point, the fresh air unit fan frequency increases; when the pressure signal fed back by the static pressure sensor is higher than a set value, the frequency of the fresh air fan of the fresh air unit is reduced. When the frequency of the fresh air fan changes, the frequency of the return air fan synchronously changes, and the same-frequency operation of the fresh air fan and the return air fan is always maintained.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (16)
1. The control method of the fresh air system is characterized by comprising the following steps of:
Judging whether each fresh air unit in the fresh air system has a faulty unit, if so, controlling the fresh air unit which does not have the fault to send fresh air to the compartment corresponding to the faulty fresh air unit;
If no fault exists in each fresh air unit in the fresh air system, whether the working conditions of part of the fresh air units are met is still judged, if yes, the part of the fresh air units are controlled to work so that the working fresh air units send fresh air to compartments which are responsible for the non-working fresh air units;
wherein, judge whether to satisfy the condition of part fresh air handling unit work, including the following: judging whether the preset number of responsible personnel of the fresh air handling unit is not less than the total number of compartments responsible by the fresh air handling units; if yes, controlling one fresh air handling unit to work;
when the fresh air system comprises two fresh air units and rated air quantity of each fresh air unit is the same, one fresh air unit is controlled to work, and the fresh air system specifically comprises the following contents: monitoring the real-time total number of the compartments respectively responsible for each fresh air handling unit; and controlling the real-time total number of the compartments to be not smaller than the work of a fresh air handling unit of the real-time total number of the compartments in charge of the other fresh air handling unit.
2. The method for controlling a fresh air system according to claim 1, wherein the determining whether the condition for operating the part of fresh air handling units is satisfied comprises:
Judging whether one fresh air unit exists, wherein the number of preset responsible personnel of the fresh air unit is larger than the total number of more than two compartments responsible by the fresh air unit.
3. The method for controlling a fresh air system according to claim 1, wherein when the fresh air system includes two fresh air units and rated air volumes of the fresh air units are different, the method for controlling one fresh air unit to operate specifically includes the following steps:
Controlling the fresh air handling unit with large rated air quantity to work; or alternatively
If the total number of the compartments in charge of each fresh air unit is smaller than the preset number of the fresh air unit with large rated air volume but not smaller than the number corresponding to the lower limit of the air volume adjustment of the fresh air unit with large rated air volume, controlling the fresh air unit with large rated air volume to work;
and if the total number of the compartments in charge of each fresh air unit is smaller than the number corresponding to the lower limit of the air quantity regulation of the fresh air unit with large rated air quantity, controlling the fresh air unit with small rated air quantity to work.
4. The control method of a fresh air system according to any one of claims 1 to 3, wherein fresh air conveying pipes of each fresh air unit are connected through a fresh air connecting pipe, return air pipes of each fresh air unit are connected through a return air connecting pipe, and control valves are arranged on the fresh air connecting pipe and the return air connecting pipe;
when the fresh air unit works fully, the opening of the control valve and the opening of the tail end fresh air valve in the fresh air system can be controlled according to the number of personnel in each compartment.
5. A control method of a fresh air system according to any one of claims 1 to 3, wherein the fresh air system comprises a first fresh air handling unit for delivering fresh air to a single compartment and a second fresh air handling unit for delivering fresh air to more than two compartments, the compartment for which the first fresh air handling unit is responsible being referred to as a first area, the compartment for which the second fresh air handling unit is responsible being referred to as a second area; the fresh air conveying pipelines of the first fresh air unit and the second fresh air unit are connected through a fresh air connecting pipeline, the return air pipelines of the first fresh air unit and the second fresh air unit are connected through a return air connecting pipeline, control valves are arranged on the fresh air connecting pipeline and the return air connecting pipeline, each compartment of the second area corresponds to more than one tail end fresh air valve of the second fresh air unit, and more than one air supply opening is arranged on the fresh air conveying pipeline of the first fresh air unit;
And if one of the two fresh air units fails, controlling the control valve to be opened.
6. The method for controlling a fresh air system according to claim 5, wherein when the first fresh air handling unit is only responsible for supplying fresh air to the first area, the number of people in the first area is monitored, and when the number of people in the first area changes, the fan of the first fresh air handling unit is controlled to be modulated to a corresponding preset frequency value.
7. The method of claim 5, wherein when the first fresh air group is responsible for supplying fresh air to both the first area and the second area:
judging whether the number of people in the first area and the second area is not smaller than a first preset responsible person number or not;
if yes, adjusting the fan frequency of the first fresh air unit to the maximum value, and opening each tail fresh air valve and the control valve to the set maximum opening;
And if not, controlling the tail end fresh air valves and controlling the opening of the control valves according to the number of the personnel in each compartment.
8. The method of claim 5, wherein when the second fresh air handling unit is only responsible for supplying fresh air to the second area:
judging whether the personnel number of the second area is not less than a second preset responsible personnel number;
if yes, the fan frequency of the second fresh air unit is adjusted to the maximum value, and each tail end fresh air valve of the second fresh air unit is opened to the set maximum opening;
And if not, controlling the opening degree of each tail end fresh air valve according to the number of the personnel in each compartment.
9. The method of claim 5, wherein when the second fresh air handling unit is responsible for supplying fresh air to both the second area and the first area:
Judging whether the personnel number of the second area and the first area is not less than a second preset responsible personnel number;
If yes, the fan frequency of the second fresh air unit is adjusted to the maximum value, and all the tail end fresh air valves and the control valves of the second fresh air unit are opened to the set maximum opening;
And if not, controlling the tail end fresh air valves and controlling the opening of the control valves according to the number of the personnel in each compartment.
10. The method of claim 5, wherein the set maximum opening of each of the end fresh air valves is positively correlated with the number of persons preset for the compartment.
11. The control method of a fresh air system according to any one of claims 7 to 9, wherein a static pressure value of a fresh air supply header pipe of the fresh air handling unit is detected;
when the fresh air fan of the fresh air unit is not controlled to run at the maximum fan frequency, the frequency of the fresh air fan of the fresh air unit is controlled to be increased; and if the static pressure value is higher than a preset static pressure value, controlling the frequency of the fresh air fan of the fresh air unit to be reduced.
12. The method of claim 11, wherein the fresh air fan frequency and the return air fan frequency of the fresh air unit are controlled to vary synchronously.
13. A fresh air system for implementing the control method according to any one of claims 1 to 12, comprising more than two fresh air handling units, wherein,
The fresh air conveying pipelines of the fresh air units are connected through fresh air connecting pipelines, the return air pipelines of the fresh air units are connected through return air connecting pipelines, and control valves are arranged on the fresh air connecting pipelines and the return air connecting pipelines.
14. The fresh air system of claim 13, further comprising a personnel quantity inspection device connected to the fresh air system controller, wherein the personnel quantity inspection device is an infrared monitoring device or a carbon dioxide concentration detection device, each compartment in charge of the fresh air unit is provided with the personnel quantity inspection device, and the controller can control the opening of the tail end fresh air valve and the control valve of the fresh air system through signals of the personnel quantity inspection device.
15. The fresh air system according to claim 13, wherein a static pressure sensor connected with the fresh air system controller is arranged in a fresh air supply header pipe of the fresh air unit, and the controller can control the operation frequency of the fan of the fresh air unit through signals of the static pressure sensor.
16. The fresh air system of claim 13, wherein the fresh air system comprises a first fresh air unit for supplying fresh air to a single compartment and a second fresh air unit for supplying fresh air to more than two compartments, terminal fresh air valves of the second fresh air unit are respectively matched with corresponding compartments, and more than one air supply port is arranged on a fresh air conveying pipeline of the first fresh air unit.
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| CN102444958A (en) * | 2010-10-11 | 2012-05-09 | 上海建坤信息技术有限责任公司 | Video people stream statistics-based fresh air system and energy-saving control method thereof |
| CN103196207A (en) * | 2013-04-19 | 2013-07-10 | 上海衡亮电子科技有限公司 | Fan coil controller |
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