CN112797540A - Heat exchange fresh air system and control method - Google Patents
Heat exchange fresh air system and control method Download PDFInfo
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- CN112797540A CN112797540A CN202011639957.2A CN202011639957A CN112797540A CN 112797540 A CN112797540 A CN 112797540A CN 202011639957 A CN202011639957 A CN 202011639957A CN 112797540 A CN112797540 A CN 112797540A
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- fresh air
- heat exchange
- temperature value
- value
- indoor 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
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted 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
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside 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
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
Abstract
The invention discloses a heat exchange fresh air system and a control method, wherein the system comprises: the system comprises a fresh air fan, an outdoor temperature sensor, an indoor temperature sensor, a people number sensor, a heat exchange device and a control module; the heat exchange device is communicated with the fresh air machine and arranged on an air inlet path of the fresh air machine, and the outdoor temperature sensor, the indoor temperature sensor, the people number sensor, the fresh air machine and the heat exchange device are electrically connected with the control module; the control module is used for acquiring the outdoor temperature value, the indoor temperature value and the number of people, and controlling the start and stop of the heat exchange device and the fresh air fan and the air volume of the fresh air fan according to the outdoor temperature value, the indoor temperature value and the number of people. The system is simple to control and can save energy.
Description
Technical Field
The invention relates to the technical field of air conditioning fresh air, in particular to a heat exchange fresh air system and a control method.
Background
Along with the continuous improvement of the living standard of people, the requirements of people on air conditioners are higher and higher, the requirements on indoor environment are stricter and stricter, the indoor air quality is paid more and more attention to besides the requirements on temperature, and therefore the fresh air conditioner is used by more and more people;
the fresh air conditioner in the prior art mostly controls the air quantity through the indoor and outdoor temperature and the indoor and outdoor air quality, and the control method is complex and cannot play a role in energy conservation.
Disclosure of Invention
Aiming at the problems in the prior art, the heat exchange fresh air system and the control method are simple to control and can save energy.
The specific technical scheme is as follows:
a heat exchange fresh air system mainly comprises: the system comprises a fresh air fan, an outdoor temperature sensor, an indoor temperature sensor, a people number sensor, a heat exchange device and a control module;
the heat exchange device is communicated with the fresh air machine and arranged on an air inlet path of the fresh air machine, and the outdoor temperature sensor, the indoor temperature sensor, the people number sensor, the fresh air machine and the heat exchange device are all electrically connected with the control module;
the control module is used for acquiring an outdoor temperature value, an indoor temperature value and a person number value, and controlling the start and stop of the heat exchange device and the fresh air fan and the air volume of the fresh air fan according to the outdoor temperature value, the indoor temperature value and the person number value.
A method of controlling a heat exchange fresh air system, the method comprising the steps of:
acquiring an outdoor temperature value, an indoor temperature value and a human value;
and controlling the start and stop of the heat exchange device and the fresh air fan and the air volume of the fresh air fan according to the outdoor temperature value, the indoor temperature value and the human numerical value.
In the control method of the heat exchange fresh air system, the method is further characterized in that the step of controlling the start and stop of the heat exchange device and the fresh air fan and the air volume of the fresh air fan according to the outdoor temperature value, the indoor temperature value and the human numerical value includes:
comparing the human value to 1;
and if the number of people is less than 1, controlling the system to be closed.
In the control method of the heat exchange fresh air system, the outdoor temperature value and the indoor temperature value are compared if the number of people is greater than or equal to 1;
and if the outdoor temperature value is greater than the indoor temperature value, controlling the heat exchange device to be opened, the fresh air fan to be opened and the fresh air fan to operate according to the preset air volume.
In the control method of the heat exchange fresh air system, the outdoor temperature value is compared with a first threshold value, and the indoor temperature value is compared with a second threshold value, if the outdoor temperature value is smaller than the indoor temperature value;
if the outdoor temperature value is greater than a first threshold value and the indoor temperature value is greater than a second threshold value, controlling the heat exchange device to be closed, the fresh air fan to be opened and the fresh air fan to operate according to the maximum air volume;
otherwise, controlling the heat exchange device to be opened, the fresh air fan to be opened and the fresh air fan to operate according to the preset air volume;
wherein the first threshold is equal to half of the second threshold.
In the above method for controlling a heat exchange ventilation system, the second threshold value is greater than or equal to 18 ℃ and less than or equal to 22 ℃.
In the control method of the heat exchange fresh air system, the preset air volume is smaller than the maximum air volume.
In the control method of a heat exchange fresh air system described above, further having a feature that the preset air volume is equal to a minimum air volume required by each person multiplied by a person number.
The positive effects of the technical scheme are as follows:
according to the heat exchange fresh air system and the control method, the proper air temperature is realized by starting and stopping the heat exchange device, the heat energy conversion consumption of the system is reduced, the proper air quantity is set according to the numerical value of people, and the air quantity is large when more people exist, and the air quantity is small when less people exist, so that the system can achieve the energy-saving effect and is simple to control.
Drawings
Fig. 1 is a schematic structural diagram of a heat exchange fresh air system according to an embodiment of the present invention;
fig. 2 is a first flowchart of a control method of a heat exchange fresh air system according to an embodiment of the present invention;
fig. 3 is a second flowchart of a control method of the heat exchange fresh air system according to the embodiment of the present invention.
In the drawings: 1. an outdoor temperature sensor; 2. an indoor temperature sensor; 3. a people number sensor; 4. a fresh air machine; 5. a heat exchange device; 6. and a control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The numbering of the components themselves, such as "first", "second", etc., is used herein only to distinguish between the objects depicted and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a heat exchange fresh air system according to an embodiment of the present invention. The embodiment of the invention discloses a heat exchange fresh air system, which comprises: the system comprises a fresh air fan 4, an outdoor temperature sensor 1, an indoor temperature sensor 2, a people number sensor 3, a heat exchange device 5 and a control module 6.
The heat exchange device 5 is communicated with the fresh air machine 4 and arranged on an air inlet path of the fresh air machine 5, an air inlet path of the fresh air machine 5 is communicated with the outside, and an air outlet path of the fresh air machine 5 is communicated with the inside. In order to enable the fresh air fan 4 to send outdoor air into the room, the fresh air firstly passes through the heat exchange device 5 for heat exchange so as to obtain fresh air with more appropriate temperature.
Outdoor temperature sensor 1 indoor temperature sensor 2 the number of people sensor 3 new fan 4 with heat exchange device 5 all with control module 6 electric connection.
Outdoor temperature sensor 1 indoor temperature sensor 2 sensor 3 with control module 6 electric connection is for giving control module 6 with outdoor temperature value, indoor temperature value and the number of people that detect.
Alternatively, the outdoor temperature sensor 1, the indoor temperature sensor 2, the people number sensor 3, the fresh air fan 4, and the heat exchanging device 5 may be integrally designed, or may be independent structures.
The control module 6 is used for acquiring an outdoor temperature value, an indoor temperature value and a person number value, and controlling the start and stop of the heat exchange device 5 and the fresh air fan 4 and the air volume of the fresh air fan 4 according to the outdoor temperature value, the indoor temperature value and the person number value.
The heat exchange fresh air system in this embodiment, through outdoor temperature sensor 1, indoor temperature sensor 2 with number sensor 3, detect outdoor, indoor temperature and number, and convey outdoor temperature value, indoor temperature value and number of people value to control module 6, control module 6 controls opening and stopping of fresh air 4 and heat exchange device 5 on the one hand, start and stop through controlling opening of heat exchange device, in order to realize suitable wind temperature, reduce the heat energy conversion consumption of system, set up suitable amount of wind according to people's numerical value, the amount of wind is big if people are many, the few amount of wind of people is few, therefore this system can reach energy-conserving effect, and control is simple.
Referring to fig. 2 and fig. 3, fig. 2 is a first flow chart illustrating a control method of a heat exchange fresh air system according to an embodiment of the present invention; fig. 3 is a second flowchart of a control method of the heat exchange fresh air system according to the embodiment of the present invention. The embodiment of the invention also discloses a control method of the heat exchange fresh air system, which comprises the following steps:
and S1, acquiring an outdoor temperature value, an indoor temperature value and a human value.
And S2, controlling the start and stop of the heat exchange device 5 and the fresh air fan 4 and the air volume of the fresh air fan 4 according to the outdoor temperature value, the indoor temperature value and the human numerical value.
Further, the step S2 of controlling the start and stop of the heat exchanging device and the fresh air blower and the air volume of the fresh air blower according to the outdoor temperature value, the indoor temperature value and the human numerical value includes:
s21, comparing the human value with 1;
and S211, if the number of people is less than 1, controlling the system to be closed.
The number of people is less than 1, namely no people are in the room, and the whole system does not need to be started.
S212, if the number of people is greater than or equal to 1, comparing the outdoor temperature value with the indoor temperature value;
and S2122, if the outdoor temperature value is greater than the indoor temperature value, controlling the heat exchange device 5 to be started, the fresh air fan 4 to be started and the fresh air fan 4 to operate according to preset air volume.
Wherein, the number of people is more than or equal to 1, and then people are in the room.
For example, in summer, the outdoor temperature is substantially higher than the indoor temperature, if the air conditioner is turned on, the outdoor temperature is much higher than the indoor temperature, the heat exchange device 5 is turned on, the air in the intake air duct is subjected to heat exchange to reduce the temperature of the air, and thus the temperature entering the room is not too high, and the temperature in the room is not greatly influenced.
S2121, if the outdoor temperature value is smaller than the indoor temperature value, comparing the outdoor temperature value with a first threshold value, and comparing the indoor temperature value with a second threshold value.
Optionally, in one case, if the outdoor temperature value is greater than a first threshold value, and the indoor temperature value is greater than a second threshold value, S2124 controls the heat exchange device 5 to be turned off, the fresh air fan 4 to be turned on, and the fresh air fan 4 to operate according to the maximum air volume.
The first threshold and the second threshold may be designed according to actual conditions.
Optionally, in this embodiment, the first threshold is equal to half of the second threshold.
Specifically, in the present embodiment, the first threshold value may be 9 ≦ 11 ℃ and the second threshold value may be 18 ≦ t1 ≦ 22 ℃.
For example, in summer, the outdoor temperature is 10 ℃ and the indoor temperature is 20 ℃, the outdoor temperature is low, the indoor temperature can be reduced when the indoor air is sent into the room, and the indoor temperature can not be increased at least, so that the heat exchange device 5 is closed at the moment, and the energy consumption can be saved.
And S2123, otherwise, controlling the heat exchange device 5 to be opened, the fresh air fan 4 to be opened and the fresh air fan 4 to operate according to the preset air volume.
Various situations may be involved at this time:
the first method comprises the following steps: and controlling the heat exchange device 5 to be opened, the fresh air fan 4 to be opened and the fresh air fan 4 to operate according to the preset air quantity when the outdoor temperature is greater than or equal to the first threshold value and the indoor temperature is less than the second threshold value. For example, in spring and autumn, the indoor and outdoor temperatures are not greatly different, and the heat exchange device 5 is opened to play a resistance role for fresh air, thereby playing a balance role.
And the second method comprises the following steps: and controlling the heat exchange device 5 to be opened, the fresh air fan 4 to be opened and the fresh air fan 4 to operate according to the preset air quantity when the outdoor temperature is less than the first threshold value and the indoor temperature is greater than or equal to the second threshold value. For example, in winter, the outdoor is cooler, and the heating installation has been seted up indoors, if directly send outdoor chilly air into indoor, be equivalent to constantly to indoor transmission cold wind, greatly influenced user's comfort level, consequently open heat exchange device 5, carry out the heat exchange with chilly air earlier for the temperature promotes to some extent, reduces the difference in temperature with indoor warmer air, then sends into indoorly, in order to avoid aforementioned problem.
And the third is that: and controlling the heat exchange device 5 to be opened, the fresh air fan 4 to be opened and the fresh air fan 4 to operate according to the preset air quantity when the outdoor temperature is less than the first threshold value and the indoor temperature is less than the second threshold value. For example, in winter, the indoor temperature and the outdoor temperature are relatively low, and at the moment, the heat exchange device 5 is opened, so that the comparative gas entering from the outdoor is changed into the warmer gas through heat exchange, and then enters the indoor, and the comfort level of indoor personnel can be improved.
Preferably, the preset air volume is smaller than the maximum air volume.
Optionally, the preset air volume is equal to a minimum air volume required by each person multiplied by a person number.
Of course, the specific values of the preset air volume and the maximum air volume may be set with reference to other situations.
It should be noted that, regarding the attribution of the endpoint location, this embodiment is only an example, and is not used to limit that the endpoint must strictly follow the foregoing description, and the endpoint may be attributed to other value sections.
The control method in the embodiment can control according to the outdoor temperature value, the indoor temperature value and the number of people detected in real time so as to achieve the purpose of energy conservation, meanwhile, the related parameters are few, and the related system is simple in structure and simple in control.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A heat exchange fresh air system, comprising: the system comprises a fresh air fan, an outdoor temperature sensor, an indoor temperature sensor, a people number sensor, a heat exchange device and a control module;
the heat exchange device is communicated with the fresh air machine and arranged on an air inlet path of the fresh air machine, and the outdoor temperature sensor, the indoor temperature sensor, the people number sensor, the fresh air machine and the heat exchange device are all electrically connected with the control module;
the control module is used for acquiring an outdoor temperature value, an indoor temperature value and a person number value, and controlling the start and stop of the heat exchange device and the fresh air fan and the air volume of the fresh air fan according to the outdoor temperature value, the indoor temperature value and the person number value.
2. A method of controlling a heat exchange ventilation system, the method comprising the steps of:
acquiring an outdoor temperature value, an indoor temperature value and a human value;
and controlling the start and stop of the heat exchange device and the fresh air fan and the air volume of the fresh air fan according to the outdoor temperature value, the indoor temperature value and the human numerical value.
3. The method for controlling the heat exchange fresh air system according to claim 2, wherein the step of controlling the start and stop of the heat exchange device and the fresh air blower and the air volume of the fresh air blower according to the outdoor temperature value, the indoor temperature value and the human numerical value comprises:
comparing the human value to 1;
and if the number of people is less than 1, controlling the system to be closed.
4. The method for controlling the heat exchange fresh air system according to claim 3, wherein if the number of people is greater than or equal to 1, the outdoor temperature value and the indoor temperature value are compared;
and if the outdoor temperature value is greater than the indoor temperature value, controlling the heat exchange device to be opened, the fresh air fan to be opened and the fresh air fan to operate according to the preset air volume.
5. The method of claim 4, wherein if the outdoor temperature value is less than the indoor temperature value, the outdoor temperature value is compared with a first threshold value, and the indoor temperature value is compared with a second threshold value;
if the outdoor temperature value is greater than a first threshold value and the indoor temperature value is greater than a second threshold value, controlling the heat exchange device to be closed, the fresh air fan to be opened and the fresh air fan to operate according to the maximum air volume;
otherwise, controlling the heat exchange device to be opened, the fresh air fan to be opened and the fresh air fan to operate according to the preset air volume;
wherein the first threshold is equal to half of the second threshold.
6. The heat exchange ventilation system control method according to claim 5, wherein the second threshold value is greater than or equal to 18 ℃ and less than or equal to 22 ℃.
7. The control method of the heat exchange fresh air system according to claim 5, wherein the preset air volume is smaller than the maximum air volume.
8. The control method of the heat exchange ventilation system according to claim 5, wherein the preset air volume is equal to a minimum air volume required by each person multiplied by a person number.
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| CN202011639957.2A CN112797540A (en) | 2020-12-31 | 2020-12-31 | Heat exchange fresh air system and control method |
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| CN202011639957.2A CN112797540A (en) | 2020-12-31 | 2020-12-31 | Heat exchange fresh air system and control method |
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Cited By (1)
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