CN110749023A - Fresh air system suitable for being used in cold regions and working method thereof - Google Patents
Fresh air system suitable for being used in cold regions and working method thereof Download PDFInfo
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- CN110749023A CN110749023A CN201911216141.6A CN201911216141A CN110749023A CN 110749023 A CN110749023 A CN 110749023A CN 201911216141 A CN201911216141 A CN 201911216141A CN 110749023 A CN110749023 A CN 110749023A
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- 238000000034 method Methods 0.000 title claims description 17
- 241000886569 Cyprogenia stegaria Species 0.000 claims abstract description 15
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 230000003749 cleanliness Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004887 air purification Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
- F24D5/02—Hot-air central heating systems; Exhaust gas central heating systems operating with discharge of hot air into the space or area to be heated
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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
- F24F11/89—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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention discloses a fresh air system suitable for being used in cold areas, which comprises a fan shell, wherein an outdoor air inlet, an indoor air supply outlet, an indoor air outlet, an outdoor air outlet and an indoor air return inlet are formed on the outer side wall of the fan shell; the fresh air duct is used for conveying air introduced from the outdoor air inlet and the indoor air return inlet to the indoor air supply outlet; the air exhaust duct is used for conveying the turbid air led in from the indoor air outlet to the outdoor air outlet; wherein, the inlet front end of the fresh air duct is provided with an air guide cavity, and a stop valve and a preheater are arranged in the air guide cavity. This application can be according to outdoor fresh air's temperature, intelligent ground control new trend fan, the fan of airing exhaust, preheater and lead to the check valve operation, avoided the electrical part effectively because the low temperature and the work that leads to is unusual, avoided leading to taking place the dewfall and the phenomenon of dripping because the inside and outside difference in temperature of fan casing, and solved heat recovery core content and easily produced the problem that freezes and lead to the jam.
Description
Technical Field
The invention relates to the technical field of fresh air systems, in particular to a fresh air system suitable for being used in cold regions and a working method thereof.
Background
The fresh air machine is an effective air purification device, can circulate indoor air, on one hand, discharges dirty indoor air outdoors, and on the other hand, conducts outdoor fresh air to the indoor space after measures such as sterilization, disinfection, filtration and the like, so that the air in the room is fresh and clean at every moment. However, when the new fan is applied to a cold region, the temperature of air sucked from the air suction opening can reach minus 30 ℃ or even lower, and electrical devices installed in the new fan are easy to work abnormally, so that the new fan loses the air exchange function; because the fresh air machine is mostly arranged indoors, when low-temperature air is introduced into the fresh air machine, the fresh air machine product can generate the phenomenon of condensation on the surface of the shell under the action of the temperature difference between the inside and the outside, so that dewing and dripping are caused, and the fresh air machine is inconvenient for a user to clean; in addition, when the heat recovery core body is in the operation process, the phenomenon of icing and blocking easily occurs under the condition of large temperature difference, so that the indoor ventilation effect is influenced, and the use experience of a user is reduced. Therefore, a new air system suitable for cold regions needs to be designed to solve the above problems.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides a fresh air system suitable for being used in cold regions and a working method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in one aspect, the present embodiment provides a fresh air system suitable for being used in cold regions, including: the outer side wall of the fan shell is provided with an outdoor air inlet, an indoor air supply outlet, an indoor air outlet, an outdoor air outlet and an indoor air return inlet; the fresh air duct is arranged in the fan shell and is used for conveying air introduced from the outdoor air inlet and the indoor air return inlet to the indoor air supply outlet; the air exhaust duct is arranged in the fan shell and used for conveying the turbid air led in from the indoor air outlet to the outdoor air outlet;
the front end of the inlet of the fresh air duct is provided with an air guide cavity, and the air guide cavity is internally provided with a pass-stop valve which can synchronously switch an outdoor air inlet and an indoor air return inlet in different directions.
Preferably, the outdoor air inlet is provided with a first temperature detector for collecting temperature information of fresh air flowing through the outdoor air inlet.
Preferably, a heat recovery core body for conducting air waste heat is arranged between the fresh air duct and the exhaust air duct; the air guide cavity is also internally provided with a preheater which can heat fresh air introduced from the outdoor air inlet; and a second temperature detector for collecting temperature information of the air to be flowed into is installed at the inlet of the fresh air duct.
Preferably, the fresh air system suitable for being used in the cold area further comprises: the fresh air fan is fixed in the fan shell and used for providing power for leading air from the outdoor air inlet and the indoor air return inlet; and the exhaust fan is fixed in the fan shell and used for providing power for leading in the turbid air from the indoor air outlet.
Preferably, a pre-stage primary filter is installed in the outdoor air inlet to intercept large particles of impurities in fresh air introduced into the outdoor air inlet and protect the preheater.
Preferably, the fresh air duct is provided with a first primary filter for filtering air to be flowed into the fresh air duct; the fresh air duct is also provided with a medium-efficiency filter for filtering air which is about to flow out of the fresh air duct.
Preferably, the exhaust air duct is provided with a second primary filter for filtering the turbid air which is about to flow into the exhaust air duct.
On the other hand, the embodiment provides a working method of a fresh air system suitable for being used in cold regions, which includes the following steps:
the method comprises the following steps: collecting a temperature value T1 of outdoor fresh air through a first temperature detector;
step two: comparing the temperature value T1 of the outdoor fresh air with a first temperature value T1 preset by a system; when the temperature value T1 of the outdoor fresh air is not lower than the first temperature value T1, entering a step three; when the temperature value T1 of the outdoor fresh air is lower than the first temperature value T1, entering the fourth step;
step three: the fresh air fan and the exhaust fan run, the preheater does not run, and the outdoor air inlet is in a fully open state; the outdoor fresh air passes through the outdoor air inlet, the air guide cavity, the fresh air duct and the indoor air supply outlet in sequence under the action of the fresh air fan and is finally guided to the indoor; the indoor turbid air passes through the indoor air outlet, the air exhaust duct and the outdoor air outlet in sequence under the action of the air exhaust fan and is finally guided to the outdoor;
step four: the fresh air fan and the exhaust fan run, the preheater also runs, a temperature value T2 at the inlet of the fresh air duct is collected through the second temperature detector, and the temperature value T2 at the inlet of the fresh air duct is compared with a third temperature value T3 and a fourth temperature value T4 preset by the system; entering a fifth step when the temperature value T2 at the inlet of the fresh air duct is not lower than the third temperature value T3; entering a sixth step when the temperature value T2 at the inlet of the fresh air duct is lower than the third temperature value T3 and not lower than the fourth temperature value T4; entering a seventh step when the temperature value T2 at the inlet of the fresh air duct is lower than a fourth temperature value T4;
step five: the fresh air fan, the exhaust fan and the preheater continuously and simultaneously operate, and the outdoor air inlet is in a fully open state; the outdoor fresh air heated by the preheater passes through the air guide cavity, the fresh air duct and the indoor air supply outlet in sequence under the action of the fresh air fan and is finally guided to the indoor; the indoor turbid air passes through the indoor air outlet, the air exhaust duct and the outdoor air outlet in sequence under the action of the air exhaust fan and is finally guided to the outdoor;
step six: the fresh air fan, the exhaust fan and the preheater continuously and simultaneously operate, and the outdoor air inlet is in a partially opened state; the outdoor fresh air after being heated by the preheater and the indoor turbid air introduced from the indoor return air inlet are mixed in the air guide cavity, sequentially pass through the fresh air duct and the indoor air supply outlet under the action of the fresh air fan, and are finally introduced into the room; the indoor turbid air passes through the indoor air outlet, the air exhaust duct and the outdoor air outlet in sequence under the action of the air exhaust fan and is finally guided to the outdoor;
step seven: the fresh air fan continuously operates, the exhaust fan and the preheater stop operating, and the outdoor air inlet is in a completely closed state; indoor turbid air guided in from an indoor air return inlet sequentially passes through the air guide cavity, the fresh air duct and the indoor air supply outlet under the action of the fresh air fan and is finally guided to the indoor; entering the step eight;
step eight: and after the fresh air system operates for a set time period according to the seventh step, the opening and closing valve can automatically and completely open the outdoor air inlet, and the fresh air system operates downwards again according to the first step until the fresh air system stops operating.
Preferably, in the second step, the temperature value T1 of the outdoor fresh air is compared with a second temperature value T2 preset by the system at the same time; wherein the second temperature value t2 is lower than the first temperature value t 1; when the temperature value T1 of the outdoor fresh air is lower than the first temperature value T1 and not lower than the second temperature value T2, entering a fourth step; when the temperature value T1 of the outdoor fresh air is lower than the second temperature value T2, the process proceeds to step seven.
Preferably, in the sixth step, the air discharge amount of the air discharge fan is adjusted in equal proportion according to the opening degree of the outdoor air inlet so as to maintain the indoor positive pressure state; the indoor turbid air quantity introduced from the indoor return air inlet is not more than the outdoor fresh air quantity after being heated by the preheater.
Compared with the prior art, the invention has the beneficial effects that: the fresh air system suitable for being used in cold areas can intelligently control the operation of the fresh air fan, the exhaust fan, the pre-heater and the on-off valve according to the temperature of outdoor fresh air, effectively avoids abnormal work of electric devices caused by low temperature, avoids the phenomena of condensation and water dripping caused by the temperature difference between the inside and the outside of the fan shell, and solves the problem of blockage caused by easy freezing of the content of the heat recovery core; the plurality of filters are arranged, so that the cleanliness of the introduced indoor air and the cleanliness of the discharged outdoor air are effectively guaranteed; because the air discharge amount of the air discharge fan can be adjusted in equal proportion according to the opening degree of the outdoor air inlet, the indoor air pressure can be maintained in a positive pressure state; because the indoor turbid air quantity led in from the indoor return air inlet is not more than the outdoor fresh air quantity after being heated by the pre-heater, the freshness of the mixed air in the air guide cavity is ensured; and when the indoor turbid air is subjected to internal circulation, the outdoor air inlet can be opened at intervals, and the temperature information of the outdoor fresh air is collected, so that the fresh air can be collected from the outdoor to the maximum extent, and the improvement on the indoor environment is facilitated.
Drawings
FIG. 1 is a schematic view illustrating the operation of the present invention in a state where the outdoor air inlet is fully opened;
FIG. 2 is a schematic view illustrating the operation of the present invention with the outdoor air inlet partially opened;
fig. 3 is a schematic view illustrating the operation of the present invention in a state where the outdoor air inlet is completely closed.
In the figure: 1. a fan housing; 11. an outdoor air inlet; 12. an indoor air supply outlet; 13. an indoor air outlet; 14. an outdoor air outlet; 130. an indoor return air inlet; 17. a heat recovery core; 18. an air exhaust duct; 10. a wind guide cavity; 3. a pass-stop valve; 4. a preheater; 21. a first temperature detector; 22. a second temperature detector; 15. a fresh air fan; 16. an exhaust fan; 61. a pre-stage primary filter; 631. a first primary filter; 62. a medium-high efficiency filter; 632. a second primary filter; 5. an electronic control unit.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1 to 3, the present invention provides a fresh air system suitable for use in cold regions, comprising:
the fan casing 1 is provided with an outdoor air inlet 11 for extracting outdoor fresh air, an indoor air supply outlet 12 for introducing the fresh air into a room, an indoor air outlet 13 for leading out turbid air from the room, an outdoor air outlet 14 for discharging the turbid air to the outside and an indoor air return opening 130 for leading the indoor turbid air to be subjected to internal circulation, which are formed on the outer side wall of the fan casing;
a fresh air duct, which is arranged in the fan housing 1 and is used for conveying air introduced from the outdoor air inlet 11 and the indoor air return inlet 130 to the indoor air supply outlet 12; and
an exhaust air duct 18, provided in the fan casing 1, for conveying the turbid air introduced from the indoor air outlet 13 to the outdoor air outlet 14;
the front end of the inlet of the fresh air duct is provided with an air guide cavity 10 for communicating the outdoor air inlet 11 and the indoor air return inlet 130, and the air guide cavity 10 is internally provided with a pass-stop valve 3 capable of synchronously and reversely opening and closing the outdoor air inlet 11 and the indoor air return inlet 130.
As an embodiment of the invention, a heat recovery core 17 for conducting the waste heat of the air is arranged between the fresh air duct and the exhaust air duct 18;
the air guide chamber 10 is also provided with a preheater 4 which can heat fresh air introduced from the outdoor air inlet 11.
As an embodiment of the present invention, the pre-heater 4 is installed at the outlet of the outdoor air inlet 11.
As an embodiment of the present invention, the open/close valve 3 can completely close the indoor air return opening 130, and the outdoor air inlet 11 is in a completely open state; while the open-close valve 3 gradually opens the indoor return air inlet 130, the outdoor air inlet 11 is simultaneously and gradually closed until the indoor return air inlet 130 is completely opened and the outdoor air inlet 11 is completely closed;
conversely, the on-off valve 3 can gradually close the indoor return air inlet 130 while the outdoor air intake 11 is gradually opened until the indoor return air inlet 130 is completely closed and the outdoor air intake 11 is completely opened;
the working process of the on-off valve 3 is the synchronous and opposite-direction switch.
As an embodiment of the present invention, the outdoor air inlet 11 is provided with a first temperature detector 21 for collecting temperature information of fresh air flowing through the outdoor air inlet;
a second temperature detector 22 for collecting temperature information of air to be flowed into is installed at an inlet of the fresh air duct.
As an embodiment of the invention, the fresh air duct and the exhaust air duct 18 are arranged in a crossed manner, and at least one crossed part is arranged between the fresh air duct and the exhaust air duct;
the heat recovery core 17 is arranged at the intersection so that the turbid air conveyed in the exhaust air duct 18 can conduct heat to the air conveyed in the fresh air duct.
As an embodiment of the present invention, the fan casing 1 is substantially rectangular;
the outdoor air inlet 11 and the outdoor air outlet 14 are formed on a first side wall of the fan shell 1;
the indoor air outlet 13 and the indoor air supply outlet 12 are formed on a second side wall opposite to the first side wall, the outdoor air inlet 11 and the indoor air outlet 13 are symmetrically arranged, and the outdoor air outlet 14 and the indoor air supply outlet 12 are symmetrically arranged;
the indoor return air opening 130 is formed on a third sidewall disposed perpendicular to the first sidewall.
As an embodiment of the present invention, a fresh air system suitable for use in cold regions further includes:
a fresh air fan 15 fixed in the fan housing 1 for providing power to introduce air from the outdoor air inlet 11 and the indoor air return 130; and
and an exhaust fan 16 fixed in the fan housing 1 for providing power for introducing the turbid air from the indoor air outlet 13.
As an embodiment of the present invention, the fresh air fan 15 is installed at the connection between the fresh air duct and the indoor supply-air outlet 12;
the exhaust fan 16 is installed at the junction of the exhaust duct 18 and the outdoor exhaust port 14.
As an embodiment of the present invention, a pre-primary filter 61 is installed in the outdoor air inlet 11 to intercept large particles of impurities from the fresh air introduced into the outdoor air inlet 11 and protect the pre-heater 4.
As an embodiment of the present invention, the fresh air duct is provided with a first primary filter 631 for filtering air to be flowed into the fresh air duct;
the fresh air duct is also provided with a medium-efficiency filter 62 for filtering air which is about to flow out of the fresh air duct.
As an embodiment of the present invention, the exhaust air duct 18 is provided with a second primary filter 632 for filtering the turbid air that will flow into the exhaust air duct 18.
As an embodiment of the present invention, the fresh air system suitable for use in cold regions further includes an electronic control unit 5, which is disposed in the fan housing 1 and is capable of sending an operation instruction to the fresh air fan 15, the exhaust air fan 16, the preheater 4, and the open/close valve 3 according to a factory setting program and temperature information collected by the first temperature detector 21 and the second temperature detector 22.
A working method of a fresh air system suitable for being used in cold regions comprises the following steps:
the method comprises the following steps: collecting a temperature value T1 of outdoor fresh air through the first temperature detector 21;
step two: comparing the temperature value T1 of the outdoor fresh air with a first temperature value T1 preset by a system;
when the temperature value T1 of the outdoor fresh air is not lower than the first temperature value T1, entering a step three;
when the temperature value T1 of the outdoor fresh air is lower than the first temperature value T1, entering the fourth step;
step three: the fresh air fan 15 and the exhaust air fan 16 are operated, the preheater 4 is not operated, and the outdoor air inlet 11 is in a fully opened state;
the outdoor fresh air passes through the outdoor air inlet 11, the air guide cavity 10, the fresh air duct and the indoor air supply outlet 12 in sequence under the action of the fresh air fan 15 and is finally guided to the indoor;
the indoor turbid air passes through the indoor air outlet 13, the exhaust air duct 18 and the outdoor air outlet 14 in sequence under the action of the exhaust fan 16 and is finally guided to the outdoor;
step four: the fresh air fan 15 and the exhaust air fan 16 operate, the preheater 4 also operates, a temperature value T2 at the inlet of the fresh air duct is collected through the second temperature detector 22, and the temperature value T2 at the inlet of the fresh air duct is compared with a third temperature value T3 and a fourth temperature value T4 preset by the system;
entering a fifth step when the temperature value T2 at the inlet of the fresh air duct is not lower than the third temperature value T3;
entering a sixth step when the temperature value T2 at the inlet of the fresh air duct is lower than the third temperature value T3 and not lower than the fourth temperature value T4;
entering a seventh step when the temperature value T2 at the inlet of the fresh air duct is lower than a fourth temperature value T4;
step five: the fresh air fan 15, the exhaust air fan 16 and the preheater 4 continuously and simultaneously operate, and the outdoor air inlet 11 is in a fully open state;
the outdoor fresh air heated by the preheater 4 passes through the air guide cavity 10, the fresh air duct and the indoor air supply outlet 12 in sequence under the action of the fresh air fan 15, and is finally guided to the indoor;
the indoor turbid air passes through the indoor air outlet 13, the exhaust air duct 18 and the outdoor air outlet 14 in sequence under the action of the exhaust fan 16 and is finally guided to the outdoor;
step six: the fresh air fan 15, the exhaust air fan 16 and the preheater 4 continuously and simultaneously operate, and the outdoor air inlet 11 is in a partially opened state;
the outdoor fresh air heated by the preheater 4 and the indoor turbid air introduced from the indoor return air inlet 130 are mixed in the air guide cavity 10, pass through the fresh air duct and the indoor air supply outlet 12 in sequence under the action of the fresh air fan 15, and are finally introduced into the room;
the indoor turbid air passes through the indoor air outlet 13, the exhaust air duct 18 and the outdoor air outlet 14 in sequence under the action of the exhaust fan 16 and is finally guided to the outdoor;
step seven: the fresh air fan 15 continuously operates, the exhaust air fan 16 and the preheater 4 stop operating, and the outdoor air inlet 11 is in a completely closed state;
the indoor turbid air introduced from the indoor return air inlet 130 passes through the air guide cavity 10, the fresh air duct and the indoor air supply outlet 12 in sequence under the action of the fresh air fan 15, and is finally introduced into the room; at the moment, the indoor turbid air is in an internal circulation state, and the step eight is carried out;
step eight: after the fresh air system suitable for being used in the cold area operates for a set time period according to the step seven, the open-close valve 3 can automatically and completely open the outdoor air inlet 11 and operates downwards according to the step one again, so that the fresh air system suitable for being used in the cold area can intermittently introduce fresh air into the room until the fresh air system suitable for being used in the cold area stops operating.
In the second step, the temperature value T1 of the outdoor fresh air is compared with a second temperature value T2 preset by the system; wherein the second temperature value t2 is lower than the first temperature value t 1;
when the temperature value T1 of the outdoor fresh air is lower than the first temperature value T1 and not lower than the second temperature value T2, entering a fourth step;
when the temperature value T1 of the outdoor fresh air is lower than the second temperature value T2, the process proceeds to step seven.
As an embodiment of the present invention, in the sixth step, since the outdoor air inlet 11 is in a partially opened state, the air discharge amount of the exhaust fan 16 is adjusted in equal proportion according to the opening degree of the outdoor air inlet 11, so as to maintain the indoor positive pressure state;
that is, the air intake amount in the outdoor air inlet 11 (when the outdoor air inlet 11 is partially opened)/the air intake amount in the outdoor air inlet 11 (when the outdoor air inlet 11 is fully opened) = the air discharge amount of the exhaust fan 16 (when the outdoor air inlet 11 is partially opened)/the air discharge amount of the exhaust fan 16 (when the outdoor air inlet 11 is fully opened).
In step six, in the unit time, the amount of the indoor turbid air introduced from the indoor return air inlet 130 is not greater than the amount (by volume) of the outdoor fresh air heated by the pre-heater 4, so as to ensure the freshness of the mixed air in the air guiding chamber 10.
In conclusion, the fresh air system suitable for being used in cold areas can intelligently control the operation of the fresh air fan, the exhaust fan, the pre-heater and the on-off valve according to the temperature of outdoor fresh air, effectively avoids abnormal work of electric devices caused by low temperature, avoids the phenomena of dewing and water dripping caused by the temperature difference between the inside and the outside of the fan shell, and solves the problem of blockage caused by easy icing of the content of the heat recovery core; the plurality of filters are arranged, so that the cleanliness of the introduced indoor air and the cleanliness of the discharged outdoor air are effectively guaranteed; because the air discharge amount of the air discharge fan can be adjusted in equal proportion according to the opening degree of the outdoor air inlet, the indoor air pressure can be maintained in a positive pressure state; because the indoor turbid air quantity led in from the indoor return air inlet is not more than the outdoor fresh air quantity after being heated by the pre-heater, the freshness of the mixed air in the air guide cavity is ensured; and when the indoor turbid air is subjected to internal circulation, the outdoor air inlet can be opened at intervals, and the temperature information of the outdoor fresh air is collected, so that the fresh air can be collected from the outdoor to the maximum extent, and the improvement on the indoor environment is facilitated.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A new trend system that is suitable for cold district's use, its characterized in that includes:
the air conditioner comprises a fan shell (1), wherein an outdoor air inlet (11), an indoor air supply outlet (12), an indoor air outlet (13), an outdoor air outlet (14) and an indoor air return inlet (130) are formed in the outer side wall of the fan shell;
the fresh air duct is arranged in the fan shell (1) and is used for conveying air introduced from the outdoor air inlet (11) and the indoor air return inlet (130) to the indoor air supply outlet (12); and
an exhaust air duct (18) arranged in the fan casing (1) and used for conveying the turbid air led in from the indoor air outlet (13) to the outdoor air outlet (14);
the front end of the inlet of the fresh air duct is provided with an air guide cavity (10), and the air guide cavity (10) is internally provided with a pass-stop valve (3) which can synchronously switch the outdoor air inlet (11) and the indoor air return inlet (130) in different directions.
2. The fresh air system suitable for cold regions according to claim 1, wherein the outdoor air inlet (11) is provided with a first temperature detector (21) for collecting temperature information of fresh air flowing through the outdoor air inlet.
3. The fresh air system suitable for the cold areas according to claim 2, wherein a heat recovery core (17) for conducting the waste heat of the air is arranged between the fresh air duct and the exhaust air duct (18);
the air guide cavity (10) is also internally provided with a preheater (4) which can heat fresh air introduced from the outdoor air inlet (11);
and a second temperature detector (22) for acquiring temperature information of air to be flowed into is mounted at an inlet of the fresh air duct.
4. The fresh air system for use in cold regions of claim 3 further comprising:
the fresh air fan (15) is fixed in the fan shell (1) and is used for providing power for leading air from the outdoor air inlet (11) and the indoor air return inlet (130); and
and the exhaust fan (16) is fixed in the fan shell (1) and is used for providing power for leading in turbid air from the indoor air outlet (13).
5. The fresh air system for cold regions according to claim 4, wherein a pre-primary filter (61) is installed in the outdoor air inlet (11) for intercepting large particle impurities of fresh air introduced into the outdoor air inlet (11) and protecting the pre-heater (4).
6. The fresh air system suitable for being used in the cold regions is characterized in that a first primary filter (631) is arranged on the fresh air duct and used for filtering air to be flowed into the fresh air duct;
the fresh air duct is also provided with a medium-efficiency filter (62) for filtering air which is about to flow out of the fresh air duct.
7. The fresh air system suitable for cold regions according to claim 4, wherein the exhaust duct (18) is provided with a second primary filter (632) for filtering the turbid air flowing into the exhaust duct (18).
8. A method of operating a fresh air system as claimed in any one of claims 4 to 7, wherein the method includes the steps of:
the method comprises the following steps: -acquiring a temperature value T1 of outdoor fresh air by means of said first temperature detector (21);
step two: comparing the temperature value T1 of the outdoor fresh air with a first temperature value T1 preset by a system;
when the temperature value T1 of the outdoor fresh air is not lower than the first temperature value T1, entering a step three;
when the temperature value T1 of the outdoor fresh air is lower than the first temperature value T1, entering the step four;
step three: the fresh air fan (15) and the exhaust air fan (16) are operated, the preheater (4) is not operated, and the outdoor air inlet (11) is in a fully opened state;
the outdoor fresh air passes through the outdoor air inlet (11), the air guide cavity (10), the fresh air duct and the indoor air supply outlet (12) in sequence under the action of the fresh air fan (15), and is finally guided to the indoor;
the indoor turbid air passes through the indoor air outlet (13), the air exhaust duct (18) and the outdoor air outlet (14) in sequence under the action of the air exhaust fan (16) and is finally guided to the outdoor;
step four: the fresh air fan (15) and the exhaust fan (16) operate, the preheater (4) also operates, the temperature value T2 at the inlet of the fresh air duct is collected through the second temperature detector (22), and the temperature value T2 at the inlet of the fresh air duct is compared with a third temperature value T3 and a fourth temperature value T4 preset by a system;
entering a fifth step when the temperature value T2 at the inlet of the fresh air duct is not lower than the third temperature value T3;
entering a sixth step when the temperature value T2 at the inlet of the fresh air duct is lower than the third temperature value T3 and not lower than the fourth temperature value T4;
entering a seventh step when the temperature value T2 at the inlet of the fresh air duct is lower than the fourth temperature value T4;
step five: the fresh air fan (15), the exhaust air fan (16) and the preheater (4) continuously and simultaneously operate, and the outdoor air inlet (11) is in a fully open state;
the outdoor fresh air heated and treated by the preheater (4) passes through the air guide cavity (10), the fresh air duct and the indoor air supply outlet (12) in sequence under the action of the fresh air fan (15) and is finally guided indoors;
the indoor turbid air passes through the indoor air outlet (13), the air exhaust duct (18) and the outdoor air outlet (14) in sequence under the action of the air exhaust fan (16) and is finally guided to the outdoor;
step six: the fresh air fan (15), the exhaust air fan (16) and the preheater (4) continuously and simultaneously operate, and the outdoor air inlet (11) is in a partially opened state;
the outdoor fresh air heated by the preheater (4) and the indoor turbid air introduced from the indoor return air inlet (130) are mixed in the air guide cavity (10), sequentially pass through the fresh air duct and the indoor air supply outlet (12) under the action of the fresh air fan (15), and are finally introduced indoors;
the indoor turbid air passes through the indoor air outlet (13), the air exhaust duct (18) and the outdoor air outlet (14) in sequence under the action of the air exhaust fan (16) and is finally guided to the outdoor;
step seven: the fresh air fan (15) continuously operates, the exhaust fan (16) and the preheater (4) stop operating, and the outdoor air inlet (11) is in a completely closed state;
indoor turbid air guided in from the indoor air return opening (130) passes through the air guide cavity (10), the fresh air duct and the indoor air supply opening (12) in sequence under the action of the fresh air fan (15), and is finally guided indoors; entering the step eight;
step eight: and after the fresh air system operates for a set time period according to the seventh step, the open-close valve (3) can automatically and completely open the outdoor air inlet (11), and the fresh air system operates downwards again according to the seventh step until the fresh air system stops operating.
9. The method as claimed in claim 8, wherein in the second step, the temperature T1 of the fresh air outside is compared with a second preset temperature T2; wherein the second temperature value t2 is lower than the first temperature value t 1;
entering the fourth step when the temperature value T1 of the outdoor fresh air is lower than the first temperature value T1 and not lower than the second temperature value T2;
entering the step seven when the temperature value T1 of the outdoor fresh air is lower than the second temperature value T2.
10. The operation method of the fresh air system suitable for cold areas according to claim 8, wherein in the sixth step, the exhaust amount of the exhaust fan (16) is proportionally adjusted according to the opening degree of the outdoor air inlet (11) to maintain the indoor positive pressure state;
the indoor turbid air quantity guided from the indoor air return opening (130) is not more than the outdoor fresh air quantity heated and treated by the preheater (4).
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