CN114508810A - Fresh air purifier, heat exchanger, system and control method - Google Patents
Fresh air purifier, heat exchanger, system and control method Download PDFInfo
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- CN114508810A CN114508810A CN202111566277.7A CN202111566277A CN114508810A CN 114508810 A CN114508810 A CN 114508810A CN 202111566277 A CN202111566277 A CN 202111566277A CN 114508810 A CN114508810 A CN 114508810A
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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
- F24F7/003—Ventilation in combination with air cleaning
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F11/62—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
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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
- F24F11/70—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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a fresh air purifier, a heat exchanger, a system and a control method, relating to the technical field of air purification, and the technical scheme is as follows: the device comprises a controller, wherein a fresh air pipeline is provided with a first flow sensor positioned on the output side of a first filter; a compensation pipeline is arranged between the outlet end of the fresh air pipeline and the exhaust pipeline; the compensation pipeline is sequentially provided with a flow regulating valve, a second filter and a second flow sensor along the output direction; the output end of the first flow sensor is connected with the first input end of the controller, and the first output end of the controller is connected with the first input end of the flow regulating valve and used for realizing fresh air flow compensation; the output end of the second flow sensor is connected with the second input end of the controller, and the second output end of the controller is connected with the second input end of the flow regulating valve for realizing flow compensation and correction. The invention can reduce the energy consumption of introducing fresh air and effectively improve the working efficiency of introducing the fresh air.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to a fresh air purifier, a heat exchanger, a system and a control method.
Background
With the increasing living standard of people, air conditioners, which are devices for adjusting indoor temperature, humidity and cleanliness, have been increasingly popularized in every household. People move in the indoor environment most of the time, so the influence of the indoor environment on the health of people is far larger than that of the outdoor environment, and the quality of indoor air is reduced due to the long-time movement of people in the indoor environment and the influence of other factors, so that firstly, the indoor air can be purified by adopting an indoor circulating purification technology, and secondly, fresh air is introduced to replace the indoor air.
At present, outdoor fresh air is generally introduced into a room after being filtered by a fresh air pipeline, indoor air is exhausted by an exhaust pipeline, and the introduced fresh air needs to be processed by a plurality of environments such as temperature, humidity and the like, so that the current indoor environmental conditions are met, a large amount of energy is consumed in the process, and the fresh air introduction efficiency is reduced to a certain extent; in addition, along with the continuous filtration processing of new trend to introducing, the filter can increase the windage because of adnexed dust to make the output flow after the filtration not reach preset output flow, seriously reduced the work efficiency that the new trend was introduced.
Therefore, how to research and design a fresh air purification technology capable of overcoming the defects is a problem which is urgently needed to be solved at present.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a fresh air purifier, a heat exchanger, a system and a control method.
The technical purpose of the invention is realized by the following technical scheme:
the fresh air purifier comprises a fresh air pipeline, an exhaust pipeline and a controller, wherein the fresh air pipeline is provided with a first filter, and the fresh air pipeline is provided with a first flow sensor positioned on the output side of the first filter;
a compensation pipeline is arranged between the outlet end of the fresh air pipeline and the exhaust pipeline;
the compensation pipeline is sequentially provided with a flow regulating valve, a second filter and a second flow sensor along the output direction;
the output end of the first flow sensor is connected with the first input end of the controller, and the first output end of the controller is connected with the first input end of the flow regulating valve and used for realizing fresh air flow compensation;
the output end of the second flow sensor is connected with the second input end of the controller, and the second output end of the controller is connected with the second input end of the flow regulating valve for realizing flow compensation and correction.
Further, the first filter and the second filter are the same filter.
In a second aspect, a heat exchanger is provided, which comprises a heat exchange shell and is characterized in that the heat exchange shell is provided with at least one fresh air purifier as in the first aspect, a fresh air pipeline and an exhaust pipeline are both arranged in the heat exchange shell in a penetrating way, and a compensation pipeline is arranged outside the heat exchange shell.
Furthermore, the fresh air pipeline and the exhaust pipeline are positioned in the heat exchange shell and are of a double-spiral structure.
In a third aspect, a fresh air purification system is provided, comprising at least one fresh air purifier as described in the first aspect.
The fourth aspect provides a fresh air purification system, which is characterized by comprising at least one fresh air purifier according to the second aspect.
In a fifth aspect, a control method is provided, which is applied to the fresh air purifier according to the first aspect, and comprises the following steps:
s1: acquiring the actual output flow filtered in the fresh air pipeline through a first flow sensor;
s2: when the actual output flow is lower than the preset output flow, calculating to obtain compensation flow according to the difference value of the actual output flow and the preset output flow, and generating a compensation control signal according to the compensation flow;
s3: the flow regulating valve responds to the compensation control signal and then opens a corresponding output range, and air in the exhaust pipeline is filtered and then is converged into an outlet of the fresh air pipeline;
s4: acquiring the filtered actual compensation flow of the compensation pipeline through a second flow sensor;
s5: compensating and correcting the output range according to the difference value of the output range and the actual compensation flow to obtain a corresponding correction range, and generating a correction control signal according to the correction range;
s6: the flow regulating valve responds to the correction control signal and then adjusts the output range.
Further, the difference between the actual output flow and the preset output flow is adjusted according to the ratio of the preset output flow to the actual output flow during the compensation flow calculation, and the specific calculation formula is as follows:
where Δ Φ represents the compensation flow; phi0Representing a preset output flow; phi1Representing the actual output flow.
Further, when the correction range is obtained, the adjustment is performed according to the wind resistance influence of the fresh air pipeline, and the specific calculation formula is as follows:
wherein, Δ Φ' represents the correction range; Δ Φ represents the compensation flow; phi0Representing a preset output flow; phi1Representing the actual output flow; phi2Representing the actual compensated flow; phi1' denotes a flow value collected by the first flow sensor after the flow compensation process.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the fresh air purifier, when the actual output flow of the fresh air pipeline after filtration is lower than the preset output flow, part of air in the exhaust pipeline is filtered and then flows into the fresh air pipeline through the compensation pipeline, so that the fresh air flow compensation is realized, the energy consumption of fresh air introduction can be reduced, and the working efficiency of fresh air introduction can be effectively improved; meanwhile, the range of the flow regulating valve is adaptively adjusted according to the filtered actual compensation flow in the compensation pipeline after the compensation of the fresh air flow, so that the flow actually output by the compensation pipeline can more accurately compensate the introduced fresh air;
2. according to the invention, the filter with the same structure as that in the fresh air pipeline is adopted in the compensation pipeline, so that the deviation of fresh air introduced into the compensation pipeline is smaller, and the reliability of the fresh air purifier is effectively improved;
3. compared with the traditional heat exchanger which utilizes energy for secondary utilization in a heat conduction mode, the heat exchanger provided by the invention has the advantages that the air in the exhaust pipeline is filtered and then directly flows into the fresh air pipeline, so that the energy reutilization efficiency can be further improved;
4. the resistance influence of the second filter is also considered when the fresh air is introduced for compensation, the ratio of the preset output flow to the actual output flow is used as a coefficient, the positive correlation adjustment is carried out on the difference value of the actual output flow and the preset output flow, and the difference between the total amount of introduced fresh air after primary compensation and the preset output flow is effectively reduced;
5. when compensation correction is carried out, the influence of the compensated flow on the flow when the fresh air is introduced is considered, so that the accuracy of the fresh air compensation correction is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a fresh air purifier in an embodiment of the invention;
fig. 2 is a flow chart of the operation of the fresh air purifier in the embodiment of the invention.
Reference numbers and corresponding part names in the drawings:
101. a fresh air duct; 102. an exhaust duct; 103. a first flow sensor; 104. a first filter; 105. a compensation pipeline; 106. a flow regulating valve; 107. a second filter; 108. a second flow sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1: a fresh air purifier comprises a fresh air pipeline 101, an exhaust pipeline and a controller, wherein the fresh air pipeline 101 is provided with a first filter 104, and the fresh air purifier also comprises a first flow sensor 103 positioned at the output side of the first filter 104; a compensation pipeline 105 is arranged between the outlet end of the fresh air pipeline 101 and the exhaust pipeline; the compensating pipeline 105 is sequentially provided with a flow regulating valve 106, a second filter 107 and a second flow sensor 108 along the output direction; the output end of the first flow sensor 103 is connected with the first input end of the controller, and the first output end of the controller is connected with the first input end of the flow regulating valve 106, so as to realize fresh air flow compensation; the output end of the second flow sensor 108 is connected to a second input end of the controller, and a second output end of the controller is connected to a second input end of the flow regulating valve 106, so as to realize flow compensation and correction.
When the actual output flow of the fresh air pipeline 101 after filtration is lower than the preset output flow, part of air in the exhaust pipeline 102 is filtered and then flows into the fresh air pipeline 101 through the compensation pipeline 105, so that the fresh air flow compensation is realized, the energy consumption of fresh air introduction can be reduced, and the working efficiency of fresh air introduction can be effectively improved; meanwhile, the range of the flow regulating valve 106 is adaptively adjusted according to the filtered actual compensation flow in the compensation pipeline 105 after the compensation of the fresh air flow, so that the flow actually output by the compensation pipeline 105 can more accurately compensate the introduced fresh air;
in the present embodiment, the first filter 104 and the second filter 107 are the same filter. A filter with the same structure as that in the fresh air pipeline 101 is adopted in the compensation pipeline 105, so that the deviation of fresh air introduced into compensation is small, and the reliability of the fresh air purifier is effectively improved;
example 2: the utility model provides a heat exchanger, includes the heat transfer casing, and the heat transfer casing is equipped with at least one fresh air purifier as embodiment 1, and fresh air pipeline 101 and exhaust duct are all worn to locate in the heat transfer casing, and compensating duct 105 sets up outside the heat transfer casing. Compared with the traditional method of utilizing energy for the second time in a heat conduction mode, the air in the exhaust pipeline 102 is filtered and then directly flows into the fresh air pipeline 101, and the energy recycling efficiency can be further improved.
In this embodiment, the fresh air duct 101 and the exhaust duct are in a double spiral structure in the heat exchange housing.
Example 3: a fresh air purification system comprising at least one fresh air purifier as in embodiment 1 or comprising at least one fresh air purifier as in embodiment 2.
Example 4: a control method, applied to a fresh air purifier according to embodiment 1, as shown in fig. 2, comprising the steps of:
s1: acquiring the actual output flow filtered in the fresh air pipeline 101 through a first flow sensor 103;
s2: when the actual output flow is lower than the preset output flow, calculating to obtain compensation flow according to the difference value of the actual output flow and the preset output flow, and generating a compensation control signal according to the compensation flow;
s3: the flow regulating valve 106 responds to the compensation control signal and then opens the corresponding output range, and the air in the exhaust pipeline 102 is filtered and then flows into the outlet of the fresh air pipeline 101;
s4: collecting the filtered actual compensation flow of the compensation pipeline 105 through a second flow sensor 108;
s5: compensating and correcting the output range according to the difference value of the output range and the actual compensation flow to obtain a corresponding correction range, and generating a correction control signal according to the correction range;
s6: the flow control valve 106 adjusts the output range in response to the modified control signal.
When the compensation flow is calculated, the difference value of the actual output flow and the preset output flow is adjusted according to the ratio of the preset output flow to the actual output flow, and the specific calculation formula is as follows:
where Δ Φ represents the compensation flow; phi0Representing a preset output flow; phi1Representing the actual output flow.
The resistance influence of the second filter 107 is also considered during the compensation of the fresh air introduction, the ratio of the preset output flow to the actual output flow is used as a coefficient, the positive correlation adjustment is carried out on the difference value of the actual output flow and the preset output flow, and the difference between the total amount of the fresh air introduction after the primary compensation and the preset output flow is effectively reduced.
When the correction range is obtained, the adjustment is carried out according to the wind resistance influence of the fresh air pipeline 101, and the specific calculation formula is as follows:
wherein, Δ Φ' represents the correction range; Δ Φ represents the compensation flow; phi0Representing a preset output flow; phi1Representing the actual output flow; phi2Representing the actual compensated flow; phi1' denotes a flow value collected by the first flow sensor 103 after the flow compensation process.
When compensation correction is carried out, the influence of the compensated flow on the flow when the fresh air is introduced is considered, so that the accuracy of the fresh air compensation correction is high.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A fresh air purifier comprises a fresh air pipeline (101) and an exhaust pipeline, wherein the fresh air pipeline (101) is provided with a first filter (104), and the fresh air purifier is characterized by also comprising a controller, wherein the fresh air pipeline (101) is provided with a first flow sensor (103) positioned at the output side of the first filter (104);
a compensation pipeline (105) is arranged between the outlet end of the fresh air pipeline (101) and the exhaust pipeline;
the compensation pipeline (105) is sequentially provided with a flow regulating valve (106), a second filter (107) and a second flow sensor (108) along the output direction;
the output end of the first flow sensor (103) is connected with the first input end of the controller, and the first output end of the controller is connected with the first input end of the flow regulating valve (106) and used for realizing fresh air flow compensation;
the output end of the second flow sensor (108) is connected with the second input end of the controller, and the second output end of the controller is connected with the second input end of the flow regulating valve (106) for realizing flow compensation and correction.
2. A fresh air purifier as claimed in claim 1, wherein the first filter (104) and the second filter (107) are the same filter.
3. A heat exchanger comprising a heat exchange housing, characterized in that the heat exchange housing is provided with at least one fresh air purifier as claimed in claim 1 or 2, the fresh air duct (101) and the exhaust duct are both arranged through the heat exchange housing, and the compensation duct (105) is arranged outside the heat exchange housing.
4. A heat exchanger according to claim 3 wherein the fresh air duct (101) and the exhaust duct are of double helical configuration within the heat exchange housing.
5. A fresh air purification system, characterized by comprising at least one fresh air purifier as claimed in claim 1 or 2.
6. A fresh air purification system, characterized by comprising at least one fresh air purifier as claimed in claim 3 or 4.
7. A control method, which is applied to a fresh air purifier as claimed in claim 1 or 2, comprising the steps of:
s1: acquiring the actual output flow filtered in the fresh air pipeline (101) through a first flow sensor (103);
s2: when the actual output flow is lower than the preset output flow, calculating to obtain compensation flow according to the difference value of the actual output flow and the preset output flow, and generating a compensation control signal according to the compensation flow;
s3: the flow regulating valve (106) responds to the compensation control signal and then opens the corresponding output range, and the air in the exhaust pipeline (102) is filtered and then is converged into the outlet of the fresh air pipeline (101);
s4: collecting the filtered actual compensation flow of the compensation pipeline (105) through a second flow sensor (108);
s5: compensating and correcting the output range according to the difference value of the output range and the actual compensation flow to obtain a corresponding correction range, and generating a correction control signal according to the correction range;
s6: the flow control valve (106) adjusts the output range in response to the modified control signal.
8. A control method according to claim 7, wherein the compensation flow is calculated by adjusting the difference between the actual output flow and the preset output flow according to the ratio of the preset output flow to the actual output flow, and the specific calculation formula is as follows:
where Δ Φ represents the compensation flow; phi0Representing a preset output flow; phi1Representing the actual output flow.
9. A control method according to claim 7, characterized in that the correction range is obtained by adjusting according to the wind resistance influence of the fresh air duct (101), and the specific calculation formula is as follows:
wherein, Δ Φ' represents the correction range; Δ Φ represents the compensation flow; phi0Representing a preset output flow; phi1Representing the actual output flow; phi2Representing the actual compensated flow; phi1' represents a flow value acquired by the first flow sensor (103) after the flow compensation process.
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