CN114216211A - Filter screen filth blockage detection assembly of fresh air conditioner, fresh air conditioner and control method of fresh air conditioner - Google Patents
Filter screen filth blockage detection assembly of fresh air conditioner, fresh air conditioner and control method of fresh air conditioner Download PDFInfo
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- CN114216211A CN114216211A CN202111547419.5A CN202111547419A CN114216211A CN 114216211 A CN114216211 A CN 114216211A CN 202111547419 A CN202111547419 A CN 202111547419A CN 114216211 A CN114216211 A CN 114216211A
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/39—Monitoring filter performance
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
- F24F1/0038—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room in combination with simultaneous exhaustion of inside air
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
- F24F1/0073—Indoor units, e.g. fan coil units with means for purifying supplied air characterised by the mounting or arrangement of filters
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F13/02—Ducting arrangements
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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
- F24F13/28—Arrangement or mounting of filters
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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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- 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
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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)
- Human Computer Interaction (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a filter screen filth blockage detection assembly of a fresh air conditioner, the fresh air conditioner and a control method of the fresh air conditioner. The detection assembly comprises: the pressure difference sensor is provided with a high-pressure channel interface and a low-pressure channel interface; the high-pressure channel switcher is provided with x high-pressure channel switcher inlets and a high-pressure channel switcher outlet and is used for switching and controlling one of the x high-pressure channel switcher inlets to be communicated with the high-pressure channel switcher outlet inside the high-pressure channel switcher; wherein the high-pressure channel switch outlet is connected with the high-pressure channel interface; the low-pressure channel switcher is provided with y low-pressure channel switcher inlets and a low-pressure channel switcher outlet and is used for switching and controlling one of the y low-pressure channel switcher inlets to be communicated with the low-pressure channel switcher outlet inside the low-pressure channel switcher; wherein the low pressure channel switch outlet is connected to the low pressure channel interface; and a plurality of pressure taking pipes connected between the pressure taking points and the high-pressure channel switcher or the low-pressure channel switcher.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a filter screen filth blockage detection assembly of a fresh air conditioner, the fresh air conditioner and a control method of the fresh air conditioner.
Background
At present, various filter screens are added to the fresh air conditioning unit due to the requirement of air purification. At present, the filth blockage detection methods for the filter screen generally comprise 3 methods: timing, differential pressure and light-sensitive methods; the timing method is to accumulate the unit operation time and judge dirty blockage after reaching the set value; the differential pressure method is characterized in that a differential pressure sensor is used for detecting the differential pressure in front of and behind a filter screen, the filth blockage degree of the filter screen is in direct proportion to the differential pressure, and if the preset value is reached, the filth blockage is judged; the photosensitive method is similar to the differential pressure method, the transmittance of the filter screen is detected by using a photosensitive sensor, the filth blockage degree of the filter screen is inversely proportional to the transmittance, and the filth blockage is judged if the filth blockage degree is lower than a preset value; the differential pressure method has the characteristic of high judgment accuracy, but a single differential pressure sensor only has 2 channels of high pressure and low pressure, and generally only can judge a single filter screen, and if a plurality of filter screens are detected, a plurality of differential pressure sensors are needed, so that the cost is increased undoubtedly.
Disclosure of Invention
In view of the above, the invention discloses a filter screen filth blockage detection assembly of a fresh air conditioner, the fresh air conditioner and a control method thereof, which are used for at least solving the problem of high detection cost of the filter screen of the existing air conditioner.
In order to achieve the above object, the invention adopts the following technical scheme:
the invention discloses a filter screen filth blockage detection assembly of a fresh air conditioner, which comprises:
the pressure difference sensor is provided with a high-pressure channel interface and a low-pressure channel interface;
the high-pressure channel switcher is provided with x high-pressure channel switcher inlets and a high-pressure channel switcher outlet and is used for switching and controlling one of the x high-pressure channel switcher inlets to be communicated with the high-pressure channel switcher outlet inside the high-pressure channel switcher; wherein the outlet of the high-pressure channel switcher is connected with the high-pressure channel interface, and x is a positive integer greater than or equal to 2;
the low-pressure channel switcher is provided with y low-pressure channel switcher inlets and a low-pressure channel switcher outlet and is used for switching and controlling one of the y low-pressure channel switcher inlets to be communicated with the low-pressure channel switcher outlet inside the low-pressure channel switcher; wherein the outlet of the low-pressure channel switcher is connected with the low-pressure channel interface, and y is a positive integer greater than or equal to 2;
the inlet ends of the x + y pressure taking pipes extend to pressure taking points of corresponding filter screens in the fresh air conditioner respectively; the outlet end of the x pressure sampling pipe is correspondingly connected with the inlets of the x high-pressure channel switchers one by one; the outlet ends of the y pressure sampling pipes are connected with the inlets of the y low-pressure channel switchers in a one-to-one correspondence mode.
The invention discloses a fresh air conditioner in a second aspect, which is characterized by comprising the detection assembly.
Further optionally, the fresh air conditioner further comprises:
the air conditioner comprises a shell, wherein a fresh air inlet for introducing fresh air, an exhaust inlet for discharging indoor air and a return air inlet for circulating indoor air are formed in the shell;
a screen assembly, comprising: the fresh air filter screen is arranged at the fresh air inlet, the air exhaust filter screen is arranged at the air exhaust inlet, and the return air filter screen is arranged at the return air inlet;
the detection assembly is used for detecting the pressure difference between the windward side and the leeward side of the fresh air filter screen, the pressure difference between the windward side and the leeward side of the exhaust filter screen and the pressure difference between the windward side and the leeward side of the return air filter screen.
Further optionally, the fresh air conditioner further comprises:
the partition plate is arranged in the shell and divides a first inner cavity and a second inner cavity into the first inner cavity and the second inner cavity, and a mounting opening is formed in the partition plate;
the fresh air channel is arranged in the first inner cavity, and two ends of the fresh air channel are respectively connected with the fresh air inlet and the mounting port.
Further optionally, the shell is provided with an exhaust outlet, a return air inlet and an air supply outlet,
the air exhaust outlet is communicated with the first inner cavity and the outside; the air exhaust inlet is communicated with the indoor and the first inner cavity; the return air inlet is communicated with the second inner cavity and the room; and the air supply outlet is communicated with the second inner cavity and the room.
Further optionally, the detection assembly comprises:
the inlet end of the first pressure taking pipe extends to the windward side of the exhaust filter screen or the windward side of the return air filter screen or the outside of the shell; the outlet end of the first pressure tapping pipe is connected with the first inlet of the high-pressure channel switcher;
the inlet end of the second pressure taking pipe is positioned in the first inner cavity and extends to the windward side of the fresh air filter screen; the outlet end of the second pressure sampling pipe is connected with the second inlet of the high-pressure channel switcher;
the inlet end of the third pressure taking pipe is positioned in the first inner cavity and extends to the leeward side of the exhaust filter screen; the outlet end of the third pressure tapping pipe is connected with the first inlet of the low-pressure channel switcher;
the inlet end of the fourth pressure taking pipe is positioned in the second inner cavity and is positioned between the outlet of the fresh air channel and the return air inlet; and the outlet end of the fourth pressure sampling pipe is connected with the second inlet of the low-pressure channel switcher.
The third aspect of the invention discloses a control method for detecting filth blockage of a filter screen of a fresh air conditioner, which is used for controlling the fresh air conditioner to detect filth blockage of the filter screen.
Further optionally, the control method includes:
responding to the received filter screen detection instruction, controlling the high-pressure channel switcher to communicate the pressure taking pipe corresponding to the corresponding filter screen with the pressure difference sensor;
and judging whether the filter screen is dirty or not according to the running state of the fan corresponding to the filter screen and the pressure difference between the windward side and the leeward side of the filter screen.
Further optionally, the judging whether dirty blocking occurs to the filter screen according to the running state of the fan corresponding to the filter screen and the pressure difference between the windward side and the leeward side of the filter screen comprises:
judging whether the fan corresponding to the corresponding filter screen operates or not;
if the pressure difference is judged to be positive, the pressure difference between the windward side and the leeward side of the corresponding filter screen is calculated, and whether filth blockage occurs is determined according to the pressure difference;
if not, the detection is ended.
Further optionally, the determining whether a filth blockage occurs based on the pressure differential comprises:
calculating the pressure difference of the windward side and the leeward side of the corresponding filter screen at preset periodic intervals;
and when the frequency of judging that the pressure difference is greater than the preset pressure difference exceeds the preset frequency, determining that the filter screen is dirty and blocked, and sending a dirty and blocked prompt.
Has the advantages that: the detection assembly can realize the function of detecting a plurality of filter screens by a single differential pressure sensor, and has higher accuracy, thereby solving the problem of high cost caused by the need of using a plurality of sensors aiming at a plurality of filter screens; and the air duct does not need to be switched by the air valve component.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
FIG. 1 illustrates a schematic view of a differential pressure sensing assembly according to an embodiment;
FIG. 2 illustrates a fresh air handling unit system diagram of an embodiment;
FIG. 3 illustrates an air flow diagram of an embodiment of the unit;
FIG. 4 illustrates a flow diagram of fresh air screen detection according to an embodiment;
FIG. 5 illustrates a return air screen inspection flow diagram according to one embodiment;
fig. 6 shows a flow chart of the detection of the exhaust screen according to an embodiment.
In the figure: 1. a fresh air filter screen; 2. an air exhaust filter screen; 3. a second pressure tapping pipe; 4. a heat exchange core; 5. a high-voltage channel switcher; 6. a low-voltage channel switcher; 7. a differential pressure sensor; 8. a return air filter screen; 9. a fresh air fan; 10. a heat exchanger; 11. a controller; 12. an exhaust fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
Present current air conditioner often sets up a plurality of filter screens, simultaneously for the detection of the filthy stifled condition of realization filter screen, can correspondingly set up a plurality of differential pressure sensor, therefore this mode can cause the cost to increase. Aiming at the problems of filter screen filth blockage detection cost and the like of the existing air conditioner, the invention provides a filter screen filth blockage detection assembly of a fresh air conditioner.
To further illustrate the technical solution of the present invention, the following specific examples are provided as shown in fig. 1 to 6.
Example 1
As shown in fig. 1, a filter screen filth blockage detection assembly for a fresh air conditioner is provided in this embodiment, the detection assembly includes:
the differential pressure sensor 7 is provided with a high-pressure channel interface Hp and a low-pressure channel interface Lp;
a high-pressure channel switcher 5, on which x high-pressure channel switcher inlets and a high-pressure channel switcher outlet H are provided, for switching and controlling one of the x high-pressure channel switcher inlets to communicate with the high-pressure channel switcher outlet H inside thereof; the outlet H of the high-pressure channel switcher is connected with the high-pressure channel interface Hp, and x is a positive integer greater than or equal to 2;
a low pressure channel switcher 6, on which y low pressure channel switcher inlets and a low pressure channel switcher outlet L are provided, for switching and controlling one of the y low pressure channel switcher inlets to communicate with the low pressure channel switcher outlet L inside thereof; the outlet L of the low-pressure channel switcher is connected with the low-pressure channel interface Lp, and y is a positive integer greater than or equal to 2;
the inlet ends of the x + y pressure taking pipes extend to pressure taking points of corresponding filter screens in the fresh air conditioner respectively; the outlet end of the x pressure sampling pipe is correspondingly connected with the inlets of the x high-pressure channel switchers one by one; the outlet ends of the y pressure sampling pipes are connected with the inlets of the y low-pressure channel switchers in a one-to-one correspondence mode.
It should be noted that, in this embodiment, the high-pressure channel switch and the low-pressure channel switch are respectively connected to a plurality of pressure-tapping pipes, and the number of the pressure-tapping pipes may be determined according to the number of the filter screens to be detected and the number of the inlets of the channel switch.
Example 2
In this embodiment, a fresh air conditioner is provided, which comprises the detecting component in embodiment 1. In addition, fresh air conditioner still includes:
the air conditioner comprises a shell, wherein a fresh air inlet for introducing fresh air, an exhaust inlet for discharging indoor air and a return air inlet for circulating indoor air are formed in the shell;
a screen assembly, comprising: the fresh air filter screen 1 is arranged at the fresh air inlet, the exhaust filter screen 2 is arranged at the exhaust inlet, and the return air filter screen 8 is arranged at the return air inlet;
the detection assembly is used for detecting the pressure difference between the windward side and the leeward side of the fresh air filter screen 1, the pressure difference between the windward side and the leeward side of the exhaust filter screen 2 and the pressure difference between the windward side and the leeward side of the return air filter screen 8.
After the fresh air conditioner in the embodiment adopts the detection assembly, the function of detecting a plurality of filter screens by a single differential pressure sensor can be realized, and the accuracy is higher; the problem of high cost caused by the fact that a plurality of filters need to use a plurality of sensors is solved; and meanwhile, after the pressure sampling pipe is additionally arranged and extends to a pressure sampling point near the corresponding filter screen, the air duct can be directly measured without an air valve component for switching.
In some optional modes, the fresh air conditioner further comprises: the partition plate is arranged in the shell and divides a first inner cavity and a second inner cavity into the first inner cavity and the second inner cavity, and a mounting opening is formed in the partition plate; the fresh air channel is arranged in the first inner cavity, and two ends of the fresh air channel are respectively connected with the fresh air inlet and the mounting port. The shell is provided with an air exhaust outlet, a return air inlet, an air supply outlet and the like. The air exhaust outlet is communicated with the first inner cavity and the outside; the air exhaust inlet is communicated with the indoor and the first inner cavity; the return air inlet is communicated with the second inner cavity and the room; and the air supply outlet is communicated with the second inner cavity and the room.
As shown in fig. 1, the fresh air conditioner in this embodiment includes the following main components: the fresh air heat exchanger comprises a fresh air filter screen 1, an exhaust air filter screen 2, a pressure taking pipe, a heat exchange core 4, a high-pressure channel switcher 5, a low-pressure channel switcher 6, a pressure difference sensor 7, an return air filter screen 8, a fresh air fan 9, a heat exchanger 10, a controller 11, an exhaust air fan 12 and the like. As shown in figure 3, the fresh air conditioner has three air supply modes of a fresh air channel, an exhaust air channel and a return air channel. The fresh air channel introduces fresh air from the outdoor, and the fresh air passes through the fresh air filter screen 1, the heat exchange core 4, the fresh air fan 9 and the heat exchanger 10 in sequence and then is sent into the indoor; indoor air is introduced into the air exhaust channel and is exhausted to the outdoor after sequentially passing through the air exhaust filter screen 2, the heat exchange core body 4, the controller 11 and the air exhaust fan 12; the return air channel introduces indoor air for treatment and then returns the indoor air to the room, and the return air passes through a return air filter screen 8, a fresh air fan 9 and a heat exchanger 10 in sequence.
In this embodiment, because its return air entry and the entry of airing exhaust correspond different inner chambers respectively, and adjacent arrangement, when detecting to the windward side (high wind pressure side) of return air filter screen 8 and filter screen 2 of airing exhaust, can only set up a pressure taking point in the entry of airing exhaust and the outside intermediate position of return air entry. Similarly, when detecting the leeward side of the fresh air filter screen 1 and the return air filter screen 8, it is also possible to combine the internal arrangement structure thereof to set a pressure taking point in the second inner cavity and between the outlet of the fresh air channel and the return air inlet. Therefore, for the detection of the fresh air filter screen 1, the exhaust filter screen 2 and the return air filter screen 8, four pressure taking points can be set, as shown in fig. 2, the pressure taking point 1 is arranged at the exhaust inlet and the return air inlet, the pressure taking point 2 is arranged at the fresh air inlet, the pressure taking point 3 is arranged between the exhaust filter screen 2 and the heat exchange core 4, and the pressure taking point 4 is arranged between the return air filter screen 8 and the fresh air fan 9.
Preferably, the detection assembly comprises:
the inlet end of the first pressure taking pipe extends to the windward side of the exhaust filter screen 2 or the windward side of the return air filter screen 8 or the outside of the shell (corresponding to a pressure taking point 1); the outlet end of the first pressure tapping pipe is connected with the first inlet e of the high-pressure channel switcher;
the inlet end of the second pressure taking pipe is positioned in the first inner cavity and extends to the windward side (corresponding to a pressure taking point 2) of the fresh air filter screen 1; the outlet end of the second pressure sampling pipe is connected with a second inlet f of the high-pressure channel switcher;
the inlet end of the third pressure taking pipe is positioned in the first inner cavity and extends to the lee side (corresponding to a pressure taking point 3) of the exhaust filter screen 2; the outlet end of the third pressure tapping pipe is connected with the first inlet m of the low-pressure channel switcher;
the inlet end of the fourth pressure taking pipe is positioned in the second inner cavity and is positioned between the outlet of the fresh air channel and the return air inlet (corresponding to a pressure taking point 4); and the outlet end of the fourth pressure sampling pipe is connected with a second inlet n of the low-pressure channel switcher.
As shown in fig. 2, the detecting assembly in this embodiment includes a plurality of pressure sampling pipes, a high-pressure channel switch 5, a low-pressure channel switch 6, and a differential pressure sensor 7. A high-pressure channel interface Hp of the differential pressure sensor 7 is connected with an H end of the high-pressure channel switcher 5, and a low-pressure channel interface Lp is connected with an L end of the low-pressure channel switcher 6. The high-pressure channel switcher 5 can switch eh communication or fh communication, the e port is connected to the pressure point 1 through a pressure taking pipe, and the f port is connected to the pressure point 2 through a pressure taking pipe. The low-pressure channel switcher 6 can switch mL UNICOM or nL UNICOM, and the m port is connected to pressure taking point 3 through the pressure taking pipe, and the n port is connected to pressure taking point 4 through the pressure taking pipe.
Example 3
The embodiment provides a control method for detecting filth blockage of a filter screen of a fresh air conditioner, and is characterized in that the control method is used for controlling the fresh air conditioner in the embodiment 2 to detect filth blockage of the filter screen.
Preferably, the control method includes: responding to the received filter screen detection instruction, controlling the high-pressure channel switcher to communicate the pressure taking pipe corresponding to the corresponding filter screen with the differential pressure sensor 7; and judging whether the filter screen is dirty or not according to the running state of the fan corresponding to the filter screen and the pressure difference between the windward side and the leeward side of the filter screen.
In some optional manners, the determining whether the filter screen is dirty or not according to the running state of the fan corresponding to the filter screen and the pressure difference between the windward side and the leeward side of the filter screen includes: judging whether the fan corresponding to the corresponding filter screen operates or not; if the pressure difference is judged to be positive, the pressure difference between the windward side and the leeward side of the corresponding filter screen is calculated, and whether filth blockage occurs is determined according to the pressure difference; if not, the detection is ended. Wherein said determining whether a dirty blockage occurs based on said pressure differential comprises: calculating the pressure difference of the windward side and the leeward side of the corresponding filter screen at preset periodic intervals; and when the frequency of judging that the pressure difference is greater than the preset pressure difference exceeds the preset frequency, determining that the filter screen is dirty and blocked, and sending a dirty and blocked prompt.
Different filter screens judge that the channel switcher needs to be switched to different communication modes, and the component execution conditions under different air channel modes are shown in the following table 1.
TABLE 1 is the filter screen filth blockage judging and executing table
When the dirty blockage of the fresh air filter screen 1 needs to be detected, the high-pressure channel switcher 5 is switched to fh communication, the low-pressure channel switcher 6 is switched to nL communication, and the fresh air fan 9 is kept in a working state;
when the dirty blockage of the return air filter screen 8 needs to be detected, the high-pressure channel switcher 5 is switched to eh communication, the low-pressure channel switcher 6 is switched to nL communication, and meanwhile, the fresh air fan 9 is kept in a working state;
when the filth blockage of the exhaust filter screen 2 needs to be detected, the high-pressure channel switcher 5 is switched to eh communication, the low-pressure channel switcher 6 is switched to mL communication, and meanwhile, the exhaust fan 12 is kept in a working state;
px, Ph and Pp are respectively preset pressure differences corresponding to the preset resistance of the fresh air filter screen 1, the return air filter screen 8 and the exhaust air filter screen 2, and when the pressure difference value detected by the pressure difference sensor 7 exceeds the corresponding preset pressure difference, the filter screen resistance is judged to be large, and the filth blockage condition exists.
The present embodiment will be described with reference to a filth blockage determination process for different filter screens.
As shown in fig. 4, after the fresh air filter screen 1 is started to detect filth blockage, the high-pressure channel switch 5 executes fh communication and the low-pressure channel switch 6 executes nL communication. And judging whether the fresh air fan 9 normally operates or not, and if so, acquiring a value P of the differential pressure sensor. If the wind resistance P is larger than the preset resistance Px of the fresh air filter screen 1, judging that the dirty and blocked condition exists, accumulating the times of reaching the standard Nx, and prompting that the fresh air filter screen 1 is dirty and blocked when the times of reaching the standard are larger than 3.
As shown in fig. 5, after the return air filter 8 is turned on to detect filth, the high-pressure channel switch 5 performs eh communication, and the low-pressure channel switch 6 performs nL communication. And judging whether the fresh air fan 9 normally operates or not, and if so, acquiring a value P of the differential pressure sensor. And if the wind resistance P is greater than the preset resistance Ph of the return air filter screen 8, judging that the dirty blockage condition exists, accumulating the number of times of reaching the standard Nh, and prompting the dirty blockage of the return air filter screen 8 when the number of times of reaching the standard is greater than 3.
As shown in fig. 6, after the exhaust filter screen 2 is activated for filth blockage detection, the high-pressure channel switch 5 performs eh communication, and the low-pressure channel switch 6 performs mL communication. And judging whether the exhaust fan 12 normally operates or not, and if so, acquiring a value P of the differential pressure sensor. If the wind resistance P is larger than the preset resistance Pp of the exhaust filter screen 2, judging that the filth blockage exists, accumulating the times of reaching the standard Np, and prompting the filth blockage of the exhaust filter screen 2 when the times of reaching the standard are larger than 3.
The number of reaching standards may be set according to actual needs, or may be other numbers. The setting can avoid the false judgment caused by the condition that the pressure difference is overlarge due to the suction of foreign matters and the dirty blocking edge. In addition, aiming at the judged time interval, when the accumulated running time t of the unit reaches the shortest replacement time t1 set by a factory, the unit executes 1 time of filter screen filth blockage detection; and then, carrying out 1 time of filter screen filth blockage detection every 168 hours of cumulative operation until judging that filth blockage exists. If the accumulated running time t of the unit exceeds the longest replacing time t2, the user can be directly prompted to replace the filter screen.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. The utility model provides a dirty stifled determine module of filter screen of new trend air conditioner which characterized in that, determine module includes:
the pressure difference sensor is provided with a high-pressure channel interface and a low-pressure channel interface;
the high-pressure channel switcher is provided with x high-pressure channel switcher inlets and a high-pressure channel switcher outlet and is used for switching and controlling one of the x high-pressure channel switcher inlets to be communicated with the high-pressure channel switcher outlet inside the high-pressure channel switcher; wherein the outlet of the high-pressure channel switcher is connected with the high-pressure channel interface, and x is a positive integer greater than or equal to 2;
the low-pressure channel switcher is provided with y low-pressure channel switcher inlets and a low-pressure channel switcher outlet and is used for switching and controlling one of the y low-pressure channel switcher inlets to be communicated with the low-pressure channel switcher outlet inside the low-pressure channel switcher; wherein the outlet of the low-pressure channel switcher is connected with the low-pressure channel interface, and y is a positive integer greater than or equal to 2;
the inlet ends of the x + y pressure taking pipes extend to pressure taking points of corresponding filter screens in the fresh air conditioner respectively; the outlet end of the x pressure sampling pipe is correspondingly connected with the inlets of the x high-pressure channel switchers one by one; the outlet ends of the y pressure sampling pipes are connected with the inlets of the y low-pressure channel switchers in a one-to-one correspondence mode.
2. A fresh air conditioner, characterized in that it comprises a detection assembly according to claim 1.
3. The fresh air conditioner according to claim 2, further comprising:
the air conditioner comprises a shell, wherein a fresh air inlet for introducing fresh air, an exhaust inlet for discharging indoor air and a return air inlet for circulating indoor air are formed in the shell;
a screen assembly, comprising: the fresh air filter screen is arranged at the fresh air inlet, the air exhaust filter screen is arranged at the air exhaust inlet, and the return air filter screen is arranged at the return air inlet;
the detection assembly is used for detecting the pressure difference between the windward side and the leeward side of the fresh air filter screen, the pressure difference between the windward side and the leeward side of the exhaust filter screen and the pressure difference between the windward side and the leeward side of the return air filter screen.
4. The fresh air conditioner according to claim 3, further comprising:
the partition plate is arranged in the shell and divides a first inner cavity and a second inner cavity into the first inner cavity and the second inner cavity, and a mounting opening is formed in the partition plate;
the fresh air channel is arranged in the first inner cavity, and two ends of the fresh air channel are respectively connected with the fresh air inlet and the mounting port.
5. The fresh air conditioner according to claim 4, wherein said casing is provided with an exhaust outlet, a return air inlet and an air supply outlet,
the air exhaust outlet is communicated with the first inner cavity and the outside; the air exhaust inlet is communicated with the indoor and the first inner cavity; the return air inlet is communicated with the second inner cavity and the room; and the air supply outlet is communicated with the second inner cavity and the room.
6. Fresh air conditioner according to claim 5, characterized in that the detection assembly comprises:
the inlet end of the first pressure taking pipe extends to the windward side of the exhaust filter screen or the windward side of the return air filter screen or the outside of the shell; the outlet end of the first pressure tapping pipe is connected with the first inlet of the high-pressure channel switcher;
the inlet end of the second pressure taking pipe is positioned in the first inner cavity and extends to the windward side of the fresh air filter screen; the outlet end of the second pressure sampling pipe is connected with the second inlet of the high-pressure channel switcher;
the inlet end of the third pressure taking pipe is positioned in the first inner cavity and extends to the leeward side of the exhaust filter screen; the outlet end of the third pressure tapping pipe is connected with the first inlet of the low-pressure channel switcher;
the inlet end of the fourth pressure taking pipe is positioned in the second inner cavity and is positioned between the outlet of the fresh air channel and the return air inlet; and the outlet end of the fourth pressure sampling pipe is connected with the second inlet of the low-pressure channel switcher.
7. A control method for detecting filth blockage of a filter screen of a fresh air conditioner is characterized by being used for controlling the fresh air conditioner as claimed in claim 6 to detect filth blockage of the filter screen.
8. The control method according to claim 7, characterized by comprising:
responding to the received filter screen detection instruction, controlling the high-pressure channel switcher to communicate the pressure taking pipe corresponding to the corresponding filter screen with the pressure difference sensor;
and judging whether the filter screen is dirty or not according to the running state of the fan corresponding to the filter screen and the pressure difference between the windward side and the leeward side of the filter screen.
9. The control method according to claim 8, wherein the determining whether the filter screen is dirty or not according to the operating state of the fan corresponding to the filter screen and the pressure difference between the windward side and the leeward side of the filter screen comprises:
judging whether the fan corresponding to the corresponding filter screen operates or not;
if the pressure difference is judged to be positive, the pressure difference between the windward side and the leeward side of the corresponding filter screen is calculated, and whether filth blockage occurs is determined according to the pressure difference;
if not, the detection is ended.
10. The control method of claim 9, wherein said determining whether a filth blockage has occurred based on the pressure differential comprises:
calculating the pressure difference of the windward side and the leeward side of the corresponding filter screen at preset periodic intervals;
and when the frequency of judging that the pressure difference is greater than the preset pressure difference exceeds the preset frequency, determining that the filter screen is dirty and blocked, and sending a dirty and blocked prompt.
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| CN202111547419.5A CN114216211B (en) | 2021-12-16 | 2021-12-16 | Filter screen filth blockage detection assembly of fresh air conditioner, fresh air conditioner and control method of fresh air conditioner |
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| CN202111547419.5A CN114216211B (en) | 2021-12-16 | 2021-12-16 | Filter screen filth blockage detection assembly of fresh air conditioner, fresh air conditioner and control method of fresh air conditioner |
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Cited By (1)
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| CN117606099A (en) * | 2023-11-24 | 2024-02-27 | 山东尚洁环境建设有限公司 | Variable ventilation pipe system for indoor purification and control method thereof |
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| CN114216211B (en) | 2022-09-23 |
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