CN115654704A - Control method and control device for optimizing refrigeration effect of fresh air conditioner and fresh air conditioner - Google Patents
Control method and control device for optimizing refrigeration effect of fresh air conditioner and fresh air conditioner Download PDFInfo
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- CN115654704A CN115654704A CN202211206854.6A CN202211206854A CN115654704A CN 115654704 A CN115654704 A CN 115654704A CN 202211206854 A CN202211206854 A CN 202211206854A CN 115654704 A CN115654704 A CN 115654704A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 45
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- 239000003507 refrigerant Substances 0.000 description 6
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Abstract
The invention relates to the technical field of air conditioners, in particular to a control method and a control device for optimizing the refrigeration effect of a fresh air conditioner and the fresh air conditioner. The control method for optimizing the refrigeration effect of the fresh air conditioner comprises the following steps: acquiring an outdoor temperature and an indoor temperature; when the outdoor temperature meets the preset condition, calculating a sum value and a first difference value of the set temperature and the first floating temperature; if the indoor temperature is larger than or equal to the first difference value and smaller than the sum value, adjusting the fresh air volume according to the indoor temperature and the set temperature; the fresh air volume is in negative correlation with the indoor temperature, and the fresh air volume is in positive correlation with the set temperature. According to the control method and the control device for optimizing the refrigerating effect of the fresh air conditioner and the fresh air conditioner, provided by the invention, when the indoor load is in a lower range, the fresh air quantity can be automatically adjusted according to the change of the indoor load, so that the indoor air quality is improved, the refrigerating effect of the fresh air conditioner can be ensured, the indoor environment can maintain better thermal comfort, and the user experience feeling can be favorably improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control device for optimizing the refrigeration effect of a fresh air conditioner and the fresh air conditioner.
Background
The fresh air conditioner is provided with a fresh air system for introducing outdoor fresh air into a room, the existing fresh air conditioner can directly send the outdoor fresh air which is not subjected to temperature adjustment treatment by the air conditioning unit into the room after introducing the outdoor fresh air, and high-temperature hot air directly enters the room in high-temperature weather, so that the indoor load can be increased; however, when the fresh air is introduced into the existing fresh air system, the air supply volume cannot be changed due to the increase of the indoor load, so that the refrigerating effect of the fresh air space is poor, and further, the thermal comfort in a room is poor, and the user experience is influenced.
Disclosure of Invention
The invention aims to provide a control method and a control device for optimizing the refrigerating effect of a fresh air conditioner and the fresh air conditioner, so as to solve the technical problem that the refrigerating effect of the fresh air conditioner in the prior art is poor at high temperature.
The control method for optimizing the refrigeration effect of the fresh air conditioner comprises the following steps:
acquiring an outdoor temperature and an indoor temperature;
when the outdoor temperature meets a preset condition, calculating a sum value and a first difference value of a set temperature and a first floating temperature;
if the indoor temperature is larger than or equal to the first difference value and smaller than the sum value, adjusting the fresh air volume according to the indoor temperature and the set temperature; the fresh air volume is negatively correlated with the indoor temperature, and the fresh air volume is positively correlated with the set temperature.
Compared with the prior art, the invention has the beneficial effects that:
according to the control method for optimizing the refrigerating effect of the fresh air conditioner, provided by the invention, when the indoor load is in a lower range, the fresh air quantity can be automatically adjusted according to the change of the indoor load, so that the refrigerating effect of the fresh air conditioner can be ensured while the indoor air quality is improved, the indoor environment can maintain better thermal comfort, and the user experience feeling can be favorably improved; in addition, the first floating temperature is set, so that the temperature adjusting range of the system can be expanded, and the overlarge system fluctuation caused by small-range adjustment is prevented, and the running reliability of the system is ensured.
As an embodiment, the step of adjusting the fresh air volume according to the indoor temperature and the set temperature includes:
adjusting the opening degree of a fresh air valve according to the indoor temperature and the set temperature;
and adjusting the rotating speed of the fresh air fan according to the opening degree of the fresh air valve, wherein the rotating speed of the fresh air fan is positively correlated with the opening degree of the fresh air valve, and the fresh air quantity is positively correlated with the opening degree of the fresh air valve.
The novel air volume adjusting device has the beneficial effects that the rotating speed of the novel air fan can be indirectly adjusted through directly controlling the opening of the novel air valve, so that the rotating speed of the novel air fan cooperates with the opening of the novel air valve to jointly realize the adjustment of the novel air volume.
As an implementation mode, the fresh air fan is provided with a plurality of air supply pipes, the fresh air valves correspond to the air supply pipes one by one, and the fresh air valves are installed on the corresponding air supply pipes; the plurality of air supply pipes are respectively communicated with a plurality of rooms, and indoor units are installed in the rooms;
the opening of the fresh air valve is adjusted according to the indoor temperature and the set temperature; the step of adjusting the rotating speed of the fresh air fan according to the opening degree of the fresh air valve comprises the following steps:
respectively adjusting the opening degree of the fresh air valve corresponding to each room according to the indoor temperature in each room and the set temperature of the indoor unit;
and adjusting the rotating speed of the fresh air fan according to the opening degree of each fresh air valve, wherein the rotating speed of the fresh air fan is in direct proportion to the sum of the opening degrees of the plurality of fresh air valves.
The novel air conditioner has the beneficial effects that the fresh air input amount of each room can be adjusted.
As an embodiment, the adjusting the opening degree of the fresh air valve according to the indoor temperature and the set temperature includes:
calculating the ratio of the set temperature to the indoor temperature;
calculating the product of the ratio and a first preset multiple of the maximum opening of the fresh air valve;
and adjusting the opening of the fresh air valve to be the product.
The novel air valve has the beneficial effects that the opening degree of the novel air valve can be adjusted.
As an implementable embodiment, the method further comprises:
if the indoor temperature is larger than or equal to the sum value, the opening degree of the fresh air valve is adjusted to be 0;
and if the indoor temperature is smaller than the first difference value, adjusting the opening of the fresh air valve to be a second preset multiple of the maximum opening.
The fresh air supply device has the advantages that when the indoor load is high, fresh air supply can be automatically stopped, and the indoor load is prevented from further rising; when the indoor load is very low, the opening of the fresh air valve is fixed to be a larger opening, so that the phenomenon that the fresh air valve is fully opened to cause overlarge room load is prevented, and the refrigeration effect of the fresh air conditioner is ensured.
As an implementation, the preset condition includes: the outdoor temperature is greater than a second difference between the set temperature and a second float temperature.
The air conditioner has the advantages that when the indoor unit starts to refrigerate, the fresh air quantity can be adjusted on the premise of ensuring the refrigeration effect; in addition, the second floating temperature can prevent the system from fluctuating too much due to the small-range adjustment, so as to ensure the reliability of the system operation.
As an implementable embodiment, the method further comprises: and when the outdoor temperature does not meet the preset conditions, controlling the outdoor unit to stop, controlling the electronic expansion valve to close, and adjusting the opening of the fresh air valve to be the maximum opening.
The air conditioner has the advantages that the air conditioner can not only keep the indoor air quality at a higher level continuously, but also save energy.
As an embodiment, the method further comprises:
after an air conditioner starting instruction is obtained, the opening degree of the fresh air valve is adjusted to be a third preset multiple of the maximum opening degree;
and after the air conditioner runs for a preset time, executing the step of acquiring the outdoor temperature and the indoor temperature.
The air conditioner has the beneficial effects that fresh air is blown in immediately after the air conditioner is started, so that the quality of indoor air is ensured.
As an embodiment, a third difference between the set temperature and a third floating temperature is calculated;
if the indoor temperature is greater than or equal to the set temperature, determining that the target superheat degree is a preset superheat degree;
if the indoor temperature is greater than or equal to the third difference and smaller than the set temperature, calculating a fourth difference between the indoor temperature and the set temperature, and determining the target superheat degree according to the fourth difference, wherein the target superheat degree is positively correlated with the fourth difference;
and if the indoor temperature is less than the third difference value, controlling the electronic expansion valve to close.
The indoor unit has the beneficial effects that the unnecessary energy consumption is reduced while the refrigeration effect of the indoor unit is ensured.
As an implementable manner, acquiring an actual superheat degree and the target superheat degree;
calculating a fifth difference between the target superheat degree and a fourth floating temperature;
if the actual superheat degree is larger than the target superheat degree, increasing the opening degree of the electronic expansion valve, wherein the single increase amplitude of the opening degree of the electronic expansion valve is the value of the absolute value of the fourth difference;
if the actual superheat degree difference value is smaller than the fifth difference value, reducing the opening degree of the electronic expansion valve, wherein the single reduction amplitude of the opening degree of the electronic expansion valve is the numerical value of the absolute value of the fourth difference value;
and if the actual superheat degree is larger than or equal to the fifth difference and smaller than the target superheat degree, controlling the opening degree of the electronic expansion valve to be kept unchanged.
The electronic expansion valve has the beneficial effects that the adaptability adjustment of the electronic expansion valve can be realized, so that the refrigeration effect is ensured.
As an implementable embodiment, the method further comprises:
if the indoor temperature is greater than or equal to the set temperature, adjusting the rotating speed of the fan of the indoor unit to the maximum rotating speed;
if the indoor temperature is lower than the set temperature, the rotating speed of the indoor unit fan is reduced, and the descending amplitude of the rotating speed of the indoor unit fan is in direct proportion to a fourth difference value between the indoor temperature and the set temperature.
The air conditioner has the beneficial effects that the adaptive adjustment of the fan of the indoor unit can be realized, so that the indoor air circulation is accelerated when the room temperature is higher, and the refrigeration effect is improved.
The invention also provides a control device for optimizing the refrigeration effect of the fresh air conditioner, which comprises:
the acquisition module is used for acquiring outdoor temperature and indoor temperature;
the calculation module is used for calculating a sum value and a first difference value of the set temperature and the first floating temperature when the outdoor temperature meets a preset condition;
and the adjusting module is used for adjusting the fresh air volume according to the indoor temperature and the set temperature when the indoor temperature is more than or equal to the first difference value and less than the sum value.
The invention also provides a fresh air conditioner which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the method.
The invention also provides a computer-readable storage medium, which stores a computer program that, when read and executed by a processor, implements the above-described method.
The control device for optimizing the refrigeration effect of the fresh air conditioner, the fresh air conditioner and the computer readable storage medium provided by the invention have the technical effect consistent with the control method for optimizing the refrigeration effect of the fresh air conditioner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a first flow chart of a control method for optimizing the refrigeration effect of a fresh air conditioner according to an embodiment of the present invention;
fig. 2 is a second flow chart of the control method for optimizing the refrigeration effect of the fresh air conditioner according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device for optimizing the refrigeration effect of a fresh air conditioner according to an embodiment of the present invention.
Description of reference numerals:
301-an obtaining module; 302-a calculation module; 303-adjustment module.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood 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 present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Fig. 1 is a control method for optimizing a cooling effect of a fresh air conditioner according to an embodiment of the present invention, where the method includes:
s102, obtaining the outdoor temperature and the indoor temperature.
And S104, when the outdoor temperature meets the preset condition, calculating the sum and the first difference of the set temperature and the first floating temperature.
The preset conditions may include: the outdoor temperature is greater than a second difference between the set temperature and the second floating temperature, that is, when the outdoor temperature is greater than the second difference, it can be determined that the outdoor temperature is high, and at this time, the indoor unit needs to start cooling to reduce the indoor temperature, and therefore, the fresh air volume needs to be adjusted on the premise of ensuring the cooling effect. The first floating temperature and the second floating temperature are set, so that the temperature adjusting range of the system is expanded, and the overlarge system fluctuation caused by small-range adjustment is prevented, so that the running reliability of the system is ensured; specifically, both the first floating temperature and the second floating temperature may be set to 2 ℃.
S106, if the indoor temperature is larger than or equal to the first difference value and smaller than the sum value, adjusting the fresh air volume according to the indoor temperature and the set temperature; the fresh air volume is in negative correlation with the indoor temperature, and the fresh air volume is in positive correlation with the set temperature.
It should be noted that, when the indoor temperature is greater than or equal to the first difference value and is less than the sum value, it indicates that the room temperature is lower and the indoor load is lower at this time, the current indoor load can be determined according to the current indoor temperature and the set temperature, and the fresh air volume can be adjusted according to the indoor load. Specifically, the fresh air volume is negatively correlated with the indoor temperature, and when the indoor temperature is reduced within the range that the first difference value is greater than or equal to the sum value under the premise that the set temperature is constant, the indoor load is reduced, at the moment, the fresh air volume can be increased, the indoor fresh air exchange speed is increased, and the indoor air quality is improved on the premise that the refrigeration effect of the fresh air conditioner is ensured; when the indoor temperature rises within the range that the first difference value is larger than or equal to the sum value, the indoor load is reduced, at the moment, the fresh air volume can be reduced, the indoor fresh air exchange speed is reduced, the problem of overlarge indoor load is avoided as much as possible, and the refrigeration effect of the fresh air conditioner is ensured. Correspondingly, the fresh air volume is positively correlated with the set temperature, and when the set temperature is increased under the premise of a certain indoor temperature, the indoor load is reduced, at the moment, the fresh air volume can be increased, the indoor fresh air exchange speed is increased, and the indoor air quality is improved under the premise of ensuring the refrigeration effect of the fresh air conditioner; when the set temperature is reduced, the indoor load is increased, and at the moment, the fresh air volume can be reduced, the indoor fresh air exchange speed is reduced, so that the problem of overlarge indoor load is avoided as much as possible, and the refrigeration effect of the fresh air conditioner is ensured.
In conclusion, the control method for optimizing the refrigeration effect of the fresh air conditioner provided by the embodiment can automatically adjust the fresh air volume according to the change of the indoor load when the indoor load is in a lower range, so that the refrigeration effect of the fresh air conditioner can be ensured while the indoor air quality is improved, the indoor environment can maintain better thermal comfort, and the improvement of the user experience is facilitated.
The step of "adjusting the fresh air volume according to the indoor temperature and the set temperature" in the step S106 may specifically include: adjusting the opening degree of the fresh air valve according to the indoor temperature and the set temperature; and adjusting the rotating speed of the fresh air fan according to the opening degree of the fresh air valve, wherein the rotating speed of the fresh air fan is positively correlated with the opening degree of the fresh air valve, and the fresh air quantity is positively correlated with the opening degree of the fresh air valve. On the premise of a certain set temperature, when the indoor temperature is reduced, the opening degree of a fresh air valve can be increased, and meanwhile, the rotating speed of a fresh air fan is increased so as to increase the fresh air quantity and improve the indoor fresh air exchange speed; when the indoor temperature rises, the opening degree of the fresh air valve can be reduced, and meanwhile, the rotating speed of the fresh air fan is reduced, so that the fresh air quantity is reduced, and the indoor fresh air exchange speed is reduced. Correspondingly, on the premise of certain indoor temperature, when the set temperature is increased, the opening degree of the fresh air valve can be increased, and meanwhile, the rotating speed of the fresh air fan is increased so as to increase the fresh air quantity and improve the indoor fresh air exchange speed; when the set temperature is reduced, the opening degree of the fresh air valve can be reduced, and meanwhile, the rotating speed of the fresh air fan is reduced to reduce the fresh air volume and reduce the indoor fresh air exchange speed, namely, the rotating speed of the fresh air fan can be indirectly adjusted through the direct control of the opening degree of the fresh air valve, so that the rotating speed of the fresh air fan cooperates with the opening degree of the fresh air valve to jointly realize the adjustment of the fresh air volume.
The control method for optimizing the refrigeration effect of the fresh air conditioner provided by the embodiment is applicable to a fresh air multi-split machine, a fresh air fan of the fresh air multi-split machine is provided with a plurality of air supply pipes, and each air supply pipe is provided with a fresh air valve, so that the opening degree of each fresh air valve can be respectively controlled to adjust the ventilation volume of each air supply pipe; the plurality of air supply pipes can be respectively communicated with the plurality of rooms, and indoor units are further installed in the rooms into which the air supply pipes are communicated, so that the fresh air multi-connected unit can supply fresh air to each room and improve the refrigerating effect of each room. Under the condition, the opening degree of the fresh air valve corresponding to each room can be respectively adjusted according to the indoor temperature in each room and the set temperature of the indoor unit, namely, the opening degree of the fresh air valve installed on the air supply pipe introduced into each room is adjusted according to the indoor temperature in a certain room and the set temperature of the indoor unit in the room, so that the ratio of the total air supply quantity of the fresh air fan occupied by the room can be adjusted, the fresh air valves on the air supply pipes introduced into each room are all adjusted according to the total air supply quantity, and further, the fresh air input quantity of each room can be adjusted. The rotating speed of the fresh air fan is adjusted according to the opening degree of each fresh air valve, wherein the rotating speed of the fresh air fan is in direct proportion to the sum of the opening degrees of the plurality of fresh air valves, namely the fresh air volume passing through each fresh air valve can change along with the change of the opening degree of the fresh air valve, so that the adjustment of the fresh air volume put into the room corresponding to the fresh air valve is realized.
The opening degree of the fresh air valve can be adjusted through the following steps:
a1, calculating the ratio of the set temperature to the indoor temperature.
A2, calculating the product of the ratio and a first preset multiple of the maximum opening of the fresh air valve; preferably, the first preset multiple is set to be 1/3, so that the opening degree of the fresh air valve can be prevented from being too large, and the fresh air valve can be gradually adjusted.
And A3, adjusting the opening of the fresh air valve to be the product.
Specifically, the opening degree of the fresh air valve may be adjusted with reference to the following formula: p _ xf = (TD/TS) × P _ xf _ max/3, where P _ xf is the target opening degree of the fresh air valve, TD is the set temperature, TS is the indoor temperature, and P _ xf _ max is the maximum opening degree of the fresh air valve.
The rotating speed of the fresh air fan can be adjusted according to the following formula: f _ xf = F _ xf _ max x (∑ P _ xf _ i/∑ P _ xf _ i _ max), wherein i =1,2 \ 8230M, M is the number of the fresh air valves; f _ xf is the current rotating speed of the fresh air fan, F _ xf _ max is the maximum rotating speed of the fresh air fan, P _ xf _ i is the current opening degree of the fresh air valve numbered i, and P _ xf _ i _ max is the maximum opening degree of the fresh air valve numbered i.
In addition, if the indoor temperature is more than or equal to the sum of the set temperature and the first floating temperature, the room temperature is higher, the indoor load is higher, and fresh air is not suitable to be input, so that the air supply channel can be blocked by adjusting the opening of the fresh air valve to be 0, and the indoor load is prevented from further increasing.
If the indoor temperature is smaller than the first difference value between the set temperature and the first floating temperature, the indoor temperature is low, the indoor load is low, the opening degree of the fresh air valve is not suitable to be adjusted according to the indoor temperature, the opening degree of the fresh air valve can be adjusted to be the second preset multiple of the maximum opening degree, the condition that the fresh air valve is fully opened to cause overlarge room load can be prevented, and the refrigerating effect of the fresh air conditioner is guaranteed. Specifically, the second preset multiple may be set to 3/4.
The method further comprises the following steps: when the outdoor temperature does not meet the preset condition, the outdoor temperature is low, the indoor unit does not need to be started for refrigeration, and the thermal comfort of the indoor environment cannot be influenced by introducing indoor fresh air from the outdoor.
The method further comprises the following steps: after the air conditioner starting instruction is obtained, the opening degree of the fresh air valve can be adjusted to be a third preset multiple of the maximum opening degree, so that fresh air can be blown in after the air conditioner is started, and the indoor air quality can be guaranteed; when the air conditioner is just started, the general indoor load is large, and the sensitivity of a user to indoor thermal comfort is low, so that the third preset multiple can be set to be 1/2, the refrigerating effect is prevented from being influenced by the overlarge opening degree of the fresh air valve, and unnecessary complaints are prevented. And after the air conditioner runs for a preset time, executing the step S102 and adjusting the opening of the fresh air valve.
The above method may further comprise the steps of:
b1, calculating a third difference value between the set temperature and a third floating temperature; wherein the third floating temperature may be set to be twice the first floating temperature, preferably 4 ℃.
B2, if the indoor temperature is higher than or equal to the set temperature, determining the target superheat degree as a preset superheat degree; wherein the preset superheat degree may be set to 2 ℃.
And B3, if the indoor temperature is greater than or equal to the third difference and less than the set temperature, calculating a fourth difference between the indoor temperature and the set temperature, and determining a target superheat degree according to the fourth difference, wherein the target superheat degree is in positive correlation with the fourth difference, namely, the target superheat degree is increased along with the reduction of the indoor temperature under the condition that the set temperature is unchanged, and through the adaptive adjustment of the target superheat degree, the unnecessary energy consumption can be reduced while the refrigeration effect of the indoor unit is ensured. Specifically, the target degree of superheat may be adjusted by the following equation: t _ mu = C +2 × (b + TD-TS), where T _ mu is the target superheat degree, C is the preset superheat degree, b is an adjustment parameter, a value of b may be set to be consistent with the first float temperature, TD is the set temperature, and TS is the indoor temperature.
And B4, if the indoor temperature is less than the third difference value, controlling the electronic expansion valve to close, stopping refrigeration and reducing unnecessary energy consumption. And when the electronic expansion valves of all the indoor units corresponding to the outdoor unit are closed, the outdoor unit can be controlled to stop.
The electronic expansion valve can be adjusted by the following method:
and C1, acquiring an actual superheat degree and a target superheat degree.
And C2, calculating a fifth difference value between the target superheat degree and the fourth floating temperature.
And C3, if the actual superheat degree is larger than the target superheat degree, it is indicated that the amount of the refrigerant of the indoor unit is relatively small, the opening degree of the electronic expansion valve needs to be increased, and the single increase amplitude of the opening degree of the electronic expansion valve is the absolute value of the fourth difference, namely P _ exv = P _ exv _ n-1+ | TS-TD |, wherein P _ exv _ n-1 is the current opening degree of the electronic expansion valve, and P _ exv is the target opening degree of the electronic expansion valve.
And C4, if the actual superheat difference is smaller than a fifth difference, the fact that the amount of the refrigerant in the indoor unit is too much indicates that the opening degree of the electronic expansion valve needs to be reduced, and the single reduction amplitude of the opening degree of the electronic expansion valve is the absolute value of the fourth difference, namely P _ exv = P _ exv _ n-1- | TS-TD |.
And C5, if the actual superheat degree is larger than or equal to the fifth difference and smaller than the target superheat degree, indicating that the amount of the refrigerant in the indoor unit is proper, and controlling the opening degree of the electronic expansion valve to be unchanged, namely P _ exv = P _ exv _ n-1.
The rotating speed of the indoor unit fan can be adjusted by adopting the following method:
d1, if the indoor temperature is more than or equal to the set temperature, adjusting the rotating speed of a fan of the indoor unit to the maximum rotating speed;
and D2, if the indoor temperature is lower than the set temperature, the rotating speed of the fan of the indoor unit is reduced, and the descending amplitude of the rotating speed of the fan of the indoor unit is in direct proportion to a fourth difference value between the indoor temperature and the set temperature. Specifically, the rotation speed of the indoor unit fan can be adjusted by the following formula: f _ nei = F _ set × (TS-TD + b)/b, where F _ nei is a target rotation speed of the indoor unit fan, F _ set is a set rotation speed of the indoor unit fan, TS is an indoor temperature, TD is a set temperature, and b is an adjustment parameter, and a value of b may be set to be consistent with the first floating temperature.
Specifically, the room fresh air system corresponds to M air ports, the opening degree of each fresh air valve is P _ xf1 and P _ xf2 \8230, and P _ xfM records a certain room temperature TS, a room set temperature TD, a room air speed F _ nei, an electronic expansion valve opening degree P _ exv and a fresh air valve opening degree P _ xf when the air conditioner is started to operate, then:
(1) controlling the opening degree of the room fresh air valve P _ xf:
fig. 2 is a schematic flow chart of a method for controlling an opening of a fresh air valve according to an embodiment of the present invention, where the method includes:
s202, the internal machine is just started up to refrigerate within 5min, P _ xf = P _ xf _ max/2, P _xf _ max is the maximum opening degree of the fresh air valve;
after the internal machine is started for 5min, the opening degree is controlled according to the indoor temperature TS and the outdoor temperature T _ wai (step b), when the internal machine is started, the indoor load is larger, fresh air is blown in for the first 5min to ensure the indoor air quality, when the internal machine is started, the sensitivity of a user to the indoor thermal comfort is lower, and unnecessary complaints are prevented
S204, after the air conditioner is started for 5min, when T _ wai is not more than TD-a, the indoor unit operates according to single air outlet, the electronic expansion valve is closed, and P _ xf = P _ xf _ max;
a is generally taken at 2 ℃.
S206, when T _ wai is larger than TD-a, the indoor unit is normally started, and the opening of the fresh air fan is controlled according to TS;
s208, when TS is larger than or equal to TD + b, P _ xf =0;
the high indoor load and slow cooling can be avoided, and b is generally 2 ℃.
S210, when TD-b is not less than TS and is less than TD + b, P _ xf = (TD/TS) multiplied by P _ xf _ max/3;
at the moment, the room temperature is low, the fresh air input is gradually increased along with the reduction of the room temperature, namely the input is carried out according to TD/TS, and the 1/3 value is obtained because the opening degree of the foundation cannot be overlarge and needs to be gradually adjusted.
S212, when TS < TD-b, P _ xf =0.75 × P _ xf _ max;
at the moment, the room temperature is very low, fresh air is introduced according to the maximum opening degree of 75%, and the overload of the fully-opened room is prevented.
Note: a. and b, setting for expanding the temperature adjusting range of the system, and preventing the influence on the reliability due to overlarge system fluctuation caused by small-range adjustment.
(2) Controlling the rotating speed F _ xf of the fresh air fan:
the rotating speed of the fresh air fan is related to the opening degree of the fresh air valve, and F _ xf = F _ xf _ max x (sigma P _ xf _ i/sigma P _ xf _ max); i =1,2 \ 8230am; f _ xf is more than or equal to F _ xf _ min.
The existing market fresh air machine generally operates according to fixed rotational speed, can't discern indoor new trend demand to adjust the rotational speed according to the demand, the waste energy. According to the method for controlling the rotating speed of the fan of the new fan, the supply is carried out as required, when the opening sum of the air ports is larger, the larger the requirement of the fresh air volume is, the larger the rotating speed of the new fan is, and the supply of the fresh air is ensured; otherwise, the smaller the total opening of the air ports is, the smaller the fresh air quantity demand is, the smaller the rotating speed of the fresh air fan is, and the energy is saved.
(3) Controlling the air speed F _ nei of a room fan (indoor unit):
the air speed of the room air conditioner is controlled according to the indoor temperature TS, when the room temperature is higher, the rotating speed is higher, the indoor air circulation is accelerated:
a. when TS is larger than or equal to TD, F _ nei = F _ nei _ max (maximum fan speed);
b. and when TS is less than TD, F _ nei = F _ set x (TS-TD + b)/b, wherein when F _ nei is less than or equal to F _ min, F _ nei = F _ min, and b is the same as the value of b in the step S208.
(4) Electronic expansion valve opening degree P _ exv control:
the opening degree P _ exv of the internal machine electronic expansion valve is controlled according to the target superheat degree T _ mu of the internal machine, when the actual superheat degree T _ guore (the outlet temperature T _ chu-the inlet temperature T _ ru of the evaporator) is larger than T _ mu, the refrigerant quantity of the internal machine is less, the valve opening degree needs to be increased, and P _ exv = P _ exv _ n-1+ | TS-TD | (only numerical calculation).
When the actual superheat degree T _ guore is less than T _ mu-2, the amount of refrigerant in the indoor unit is too large, the valve opening needs to be reduced, and P _ exv = P _ exv _ n-1- | TS-TD | (only numerical calculation).
When T _ mu-2 is not less than T _ guore not less than T _ mu, the refrigerant quantity is proper, the valve opening degree does not need to be changed, and P _ exv = P _ exv _ n-1.
The control adopts variable target superheat degree T _ mu control, and the target superheat degree is related to indoor temperature and set temperature:
a. when TS is larger than or equal to TD, T _ mu = C, and C is generally 2 ℃;
b. when TD-2b is less than or equal to TS and less than TD, T _ mu = C +2 x (b + TD-TS), and the lower the temperature is, the larger the target superheat degree is;
c. when TS is less than TD-2b, the inner machine operates according to single air outlet, and the machine is shut down when reaching the temperature, and the electronic expansion valve is closed.
Fig. 3 is a control device for optimizing the cooling effect of a fresh air conditioner according to an embodiment of the present invention, where the control device includes:
an obtaining module 301, configured to obtain an outdoor temperature and an indoor temperature;
the calculating module 302 is configured to calculate a sum and a first difference between the set temperature and the first floating temperature when the outdoor temperature meets a preset condition;
and the adjusting module 303 is configured to adjust the fresh air volume according to the indoor temperature and the set temperature when the indoor temperature is greater than or equal to the first difference and is less than the sum.
According to the control device for optimizing the refrigeration effect of the fresh air conditioner, provided by the embodiment, the adjusting module 303 can automatically adjust the fresh air volume according to the change of the indoor load when the indoor load is in a lower range, so that the refrigeration effect of the fresh air conditioner can be ensured while the indoor air quality is improved, the indoor environment can maintain better thermal comfort, and the user experience can be improved; in addition, the temperature adjusting range of the system can be expanded due to the arrangement of the first floating temperature, and the overlarge system fluctuation caused by small-range adjustment is prevented, so that the running reliability of the system is ensured.
Specifically, the adjusting module 303 may adjust the opening of the fresh air valve according to the indoor temperature and the set temperature; and the rotating speed of the fresh air fan can be adjusted according to the opening degree of the fresh air valve.
The adjusting module 303 may specifically include a ratio calculating unit, a product calculating unit, and an adjusting unit, wherein the ratio calculating unit is configured to calculate a ratio between the set temperature and the indoor temperature, the product calculating unit is configured to calculate a product of the ratio and a first preset multiple of a maximum opening degree of the fresh air valve, and the adjusting unit is configured to adjust the opening degree of the fresh air valve to the product.
The adjusting module 303 is further configured to adjust the opening degree of the fresh air valve to 0 when the indoor temperature is greater than or equal to a sum of the fixed temperature and the first floating temperature, and adjust the opening degree of the fresh air valve to a second preset multiple of the maximum opening degree when the indoor temperature is less than the first difference.
The control device for optimizing the refrigeration effect of the fresh air conditioner provided by the embodiment can further comprise a control module, and the control module can control the outdoor unit to stop when the outdoor temperature does not meet the preset condition, control the electronic expansion valve to close, and adjust the opening degree of the fresh air valve to the maximum opening degree.
The adjusting module 303 can also adjust the opening of the fresh air valve to a third preset multiple of the maximum opening after the obtaining module 301 obtains the air conditioner startup instruction; the obtaining module 301 can obtain the outdoor temperature and the indoor temperature after the air conditioner runs for a preset time.
The calculating module 302 may further calculate a third difference between the set temperature and a third floating temperature, and the control device for optimizing the refrigeration effect of the fresh air conditioner according to this embodiment may further include a determining module, where the determining module is capable of determining the target superheat degree as the preset superheat degree when the indoor temperature is greater than or equal to the set temperature; the calculating module 302 may further calculate a fourth difference between the indoor temperature and the set temperature when the indoor temperature is greater than or equal to the third difference and less than the set temperature; the determination module may determine the target superheat degree based on the fourth difference; the control module can control the electronic expansion valve to close when the indoor temperature is smaller than the third difference value.
The acquiring module 301 can also acquire an actual superheat degree and a target superheat degree; the calculation module 302 may also be capable of calculating a fifth difference between the target superheat and the fourth float temperature; the adjusting module 303 may increase the opening degree of the electronic expansion valve when the actual superheat degree is greater than the target superheat degree, decrease the opening degree of the electronic expansion valve when the actual superheat degree difference is less than the fifth difference, and control the opening degree of the electronic expansion valve to be maintained when the actual superheat degree is greater than or equal to the fifth difference and less than the target superheat degree.
The adjusting module 303 can also adjust the rotating speed of the indoor unit fan to the maximum rotating speed when the indoor temperature is greater than or equal to the set temperature; and when the indoor temperature is lower than the set temperature, the rotating speed of the fan of the indoor unit can be reduced.
The embodiment also provides a fresh air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and when the computer program is read by the processor and runs, the control method for optimizing the refrigeration effect of the fresh air conditioner is realized.
The embodiment further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is read by a processor and runs, the processes of the control method for optimizing the refrigeration effect of the fresh air conditioner are implemented, and the same technical effects can be achieved, and are not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art can understand that all or part of the processes in the methods according to the above embodiments may be implemented by instructing a control device to implement the methods according to the above embodiments by a computer, and the program may be stored in a computer-readable storage medium, and when executed, the program may include the processes according to the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, or the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the following descriptions are only illustrative and not restrictive, and that the scope of the present invention is not limited to the above embodiments: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the scope of the disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. A control method for optimizing the refrigeration effect of a fresh air conditioner is characterized by comprising the following steps:
acquiring an outdoor temperature and an indoor temperature;
when the outdoor temperature meets a preset condition, calculating a sum and a first difference of a set temperature and a first floating temperature;
if the indoor temperature is larger than or equal to the first difference value and smaller than the sum value, adjusting the fresh air volume according to the indoor temperature and the set temperature; wherein the fresh air volume is negatively correlated with the indoor temperature, and the fresh air volume is positively correlated with the set temperature.
2. The control method for optimizing the refrigeration effect of the fresh air conditioner according to claim 1, wherein the step of adjusting the fresh air volume according to the indoor temperature and the set temperature comprises the following steps:
adjusting the opening of the fresh air valve according to the indoor temperature and the set temperature;
and adjusting the rotating speed of the fresh air fan according to the opening degree of the fresh air valve, wherein the rotating speed of the fresh air fan is positively correlated with the opening degree of the fresh air valve, and the fresh air quantity is positively correlated with the opening degree of the fresh air valve.
3. The control method for optimizing the refrigeration effect of the fresh air conditioner as claimed in claim 2, wherein the fresh air blower has a plurality of air supply pipes, the fresh air valves are in one-to-one correspondence with the air supply pipes, and the fresh air valves are installed in the corresponding air supply pipes; the plurality of air supply pipes are respectively communicated with a plurality of rooms, and indoor units are installed in the rooms;
the opening of the fresh air valve is adjusted according to the indoor temperature and the set temperature; the step of adjusting the rotating speed of the fresh air fan according to the opening degree of the fresh air valve comprises the following steps:
respectively adjusting the opening degree of the fresh air valve corresponding to each room according to the indoor temperature in each room and the set temperature of the indoor unit;
and adjusting the rotating speed of the fresh air fan according to the opening degree of each fresh air valve, wherein the rotating speed of the fresh air fan is in direct proportion to the sum of the opening degrees of the plurality of fresh air valves.
4. The control method for optimizing the refrigeration effect of the fresh air conditioner according to claim 2, wherein the step of adjusting the opening degree of the fresh air valve according to the indoor temperature and the set temperature comprises the following steps:
calculating the ratio of the set temperature to the indoor temperature;
calculating the product of the ratio and a first preset multiple of the maximum opening of the fresh air valve;
and adjusting the opening of the fresh air valve to be the product.
5. The control method for optimizing the refrigeration effect of the fresh air conditioner as claimed in claim 2, wherein the method further comprises:
if the indoor temperature is larger than or equal to the sum, the opening degree of the fresh air valve is adjusted to be 0;
and if the indoor temperature is smaller than the first difference value, adjusting the opening of the fresh air valve to a second preset multiple of the maximum opening.
6. The control method for optimizing the refrigeration effect of the fresh air conditioner according to claim 1, wherein the preset conditions include: the outdoor temperature is greater than a second difference between the set temperature and a second float temperature.
7. The control method for optimizing the refrigeration effect of the fresh air conditioner as claimed in claim 2, wherein the method further comprises: and when the outdoor temperature does not meet the preset conditions, controlling the outdoor unit to stop, controlling the electronic expansion valve to close, and adjusting the opening of the fresh air valve to be the maximum opening.
8. The control method for optimizing the refrigeration effect of the fresh air conditioner as claimed in claim 2, wherein the method further comprises:
after an air conditioner starting instruction is obtained, the opening degree of the fresh air valve is adjusted to be a third preset multiple of the maximum opening degree;
and when the air conditioner runs for a preset time, executing the step of acquiring the outdoor temperature and the indoor temperature.
9. The control method for optimizing the refrigeration effect of the fresh air conditioner as claimed in any one of claims 1 to 8, wherein the method further comprises:
calculating a third difference value between the set temperature and a third floating temperature;
if the indoor temperature is greater than or equal to the set temperature, determining that the target superheat degree is a preset superheat degree;
if the indoor temperature is greater than or equal to the third difference and smaller than the set temperature, calculating a fourth difference between the indoor temperature and the set temperature, and determining the target superheat degree according to the fourth difference, wherein the target superheat degree is positively correlated with the fourth difference;
and if the indoor temperature is less than the third difference, controlling the electronic expansion valve to be closed.
10. The control method for optimizing the refrigeration effect of the fresh air conditioner as claimed in claim 9, wherein the method further comprises:
acquiring an actual superheat degree and the target superheat degree;
calculating a fifth difference between the target superheat degree and a fourth floating temperature;
if the actual superheat degree is larger than the target superheat degree, increasing the opening degree of the electronic expansion valve, wherein the single increase amplitude of the opening degree of the electronic expansion valve is the value of the absolute value of the fourth difference;
if the actual superheat degree difference value is smaller than the fifth difference value, reducing the opening degree of the electronic expansion valve, wherein the single reduction amplitude of the opening degree of the electronic expansion valve is the numerical value of the absolute value of the fourth difference value;
and if the actual superheat degree is larger than or equal to the fifth difference and smaller than the target superheat degree, controlling the opening degree of the electronic expansion valve to be kept unchanged.
11. The control method for optimizing the refrigeration effect of the fresh air conditioner as claimed in any one of claims 1 to 8, wherein the method further comprises:
if the indoor temperature is greater than or equal to the set temperature, adjusting the rotating speed of the fan of the indoor unit to the maximum rotating speed;
if the indoor temperature is lower than the set temperature, the rotating speed of the indoor unit fan is reduced, and the descending amplitude of the rotating speed of the indoor unit fan is in direct proportion to a fourth difference value between the indoor temperature and the set temperature.
12. The utility model provides an optimize fresh air conditioner refrigeration effect's controlling means which characterized in that, the device includes:
the acquisition module is used for acquiring the outdoor temperature and the indoor temperature;
the calculation module is used for calculating a sum value and a first difference value of the set temperature and the first floating temperature when the outdoor temperature meets a preset condition;
and the adjusting module is used for adjusting the fresh air volume according to the indoor temperature and the set temperature when the indoor temperature is more than or equal to the first difference value and less than the sum value.
13. A fresh air conditioner comprising a processor and a computer readable storage medium storing a computer program which, when read and executed by the processor, carries out the method of any one of claims 1 to 11.
14. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method of any one of claims 1-11.
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