CN103673107B - Air conditioner and control method and device thereof - Google Patents
Air conditioner and control method and device thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000005057 refrigeration Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 230000008569 process Effects 0.000 claims description 39
- 238000007791 dehumidification Methods 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 24
- 238000009423 ventilation Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000001808 coupling effect Effects 0.000 abstract 1
- 238000004378 air conditioning Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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Abstract
The invention discloses an air conditioner. The air conditioner comprises a first cold source, a second cold source, a fresh air/humidification device and a heat exchange device. The first cold source is connected with the heat exchange device and the fresh air/humidification device. The second cold source is connected with the fresh air/humidification device. The invention further comprises a control method and device of the air conditioner. By the adoption of the air conditioner and the control method and device of the air conditioner, according to the change of an actual environment, through the coupling effect on the double cold sources by an indoor heat exchanger, adjustment of the distribution of the refrigeration ability or the heating ability of two refrigeration systems and control over switching-on/switching-off of dehumanization or humidification are achieved, the transmission and optimal matching of the refrigeration ability are achieved, and the heat and humidity adjusting requirement of all climatic environments comprising the climatic environment which is high in temperature and humidity, the climatic environment which is high in temperature and low in humidity, the climatic environment which is low in temperature and high in humidity, and the climatic environment which is low in temperature and humidity are met. In this way, by the adoption of the air conditioner and the control method and device of the air conditioner, it is guaranteed that when a room humidity and hot load treatment requirement is changed, in-time treatment can be conducted by the air conditioner so that the temperature and the humidity in a room can be controlled within a comfortable range all the time.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an air conditioner and a control method and a control device thereof.
Background
Along with the improvement of living standard, the use requirements of people on air conditioning equipment are higher and higher, and the basic performances such as refrigeration, dehumidification and the like are improved, and higher requirements on the aspects of energy conservation, environmental protection, comfort, health and the like are also provided.
There is an air conditioning system in the prior art which mainly includes a latent heat load processing device and a sensible heat load processing device for adjusting a sensible heat load and a wet load of air, respectively. Although it can realize independent adjustment of temperature and humidity, because the dual cold sources are independent, there are the following problems:
take the case of the air conditioning system operating in a cooling mode as an example. When the air conditioning system operates in a refrigeration mode, the latent heat load processing equipment only has a dehumidification function, and the sensible heat load processing equipment only has a cooling function. Therefore, if the sensible heat load of the environment is very large and the latent heat load is very small, the cooling system runs at full capacity, and the cooling dehumidification system is idle. Conversely, if the sensible heat load of the environment is small and the latent heat load is very large, the chiller system will be idle and the chiller dehumidification system will run at full capacity. It is known that the operation efficiency of the air conditioning system is relatively low.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, a control method and a control device thereof, aiming at improving the operation efficiency of the air conditioner.
In order to achieve the above purpose, the present invention provides an air conditioner, comprising a first cold source, a second cold source, a fresh air/humidifying device and a heat exchange device; wherein the first cold source is respectively connected with the heat exchange device and the fresh air/humidification device, the second cold source is connected with the fresh air/humidification device, the heat exchange device controls the operation of the fresh air/humidification device through the coupling of the first cold source and the second cold source based on environment information, and the environment information comprises the current environment temperature and/or humidity.
Preferably, the heat exchange device comprises a first fan, an air-cooled heat exchanger, an air pipe and a first electronic expansion valve; the first fan and the air-cooled heat exchanger are both arranged in the air duct, and the first electronic expansion valve is connected to a passage between an exhaust port of the first cold source and an air inlet of the air-cooled heat exchanger; and the air return port of the first cold source is communicated with the air outlet of the air-cooled heat exchanger.
Preferably, the heat exchange device comprises a water evaporator, a water pump, a water tank, a water inlet valve, a water return valve and a fourth electronic expansion valve; wherein, the air inlet of the water evaporator is communicated with the air outlet of the second cold source, and the fourth electronic expansion valve is connected on the passage; the air outlet of the water evaporator is communicated with the air return port of the second cold source; the water inlet valve is connected to a water inlet pipe of the water evaporator, and the water pump, the water tank and the water outlet valve are sequentially connected to a water outlet pipe of the water evaporator.
Preferably, the fresh air/humidification device comprises a fresh air pipe, a ventilation air valve, a return air pipe, a second fan, a second cold source evaporator, a first cold source evaporator, a humidification port, a second electronic expansion valve and a third electronic expansion valve; the fresh air pipe and the return air pipe form an air pipe of a fresh air/humidifying device; the second fan, the second cold source evaporator, the first cold source evaporator and the humidifying port are all arranged in the air pipe; the second electronic expansion valve is connected to a passage between the exhaust port of the first cold source and the air inlet of the first cold source evaporator; the air return port of the first cold source is also communicated with the air outlet of the first cold source evaporator; the air outlet of the second cold source is communicated with the air inlet of the second cold source evaporator, and the third electronic expansion valve is arranged on the passage; and the air return port of the second cold source is communicated with the air outlet of the second cold source evaporator.
The invention also provides a control method of the air conditioner, wherein the air conditioner is the air conditioner with the structure; the control method of the air conditioner comprises the following steps:
when the air conditioner operates in a refrigerating or heating mode, detecting the indoor environment humidity M0 in real time;
judging whether the humidity M0 is greater than a first preset humidity M1;
when the humidity M0> M1, starting a dehumidification mode;
and when the humidity M0 is less than or equal to M1, starting a humidifying mode.
Preferably, when the air conditioner is in a cooling and dehumidifying mode, the specific control process includes:
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is greater than the delta T1, controlling the first cold source and the second cold source to perform refrigeration operation, opening the first electronic expansion valve and the second electronic expansion valve, and performing high-grade operation on the first fan and the second fan;
when the delta T1 is more than or equal to the delta T2, controlling a first cold source to perform independent refrigeration operation and a first fan to perform high-grade operation, and simultaneously controlling a second cold source to start refrigeration and dehumidification and a second fan to perform high-grade operation when the humidity M0 is more than or equal to M2, and turning off the second cold source and the second fan until the humidity M0 is less than or equal to M1;
when the delta T is less than or equal to the delta T3, comparing the humidity M0 with a preset humidity threshold value;
when the humidity M0 is greater than or equal to M3, controlling the first cold source and the second cold source to perform refrigeration operation, closing the first electronic expansion valve, opening the second electronic expansion valve, closing the first fan and performing low-grade operation on the second fan;
when M3 is more than M0 and is more than or equal to M2, the first cold source is controlled to be closed, the first electronic expansion valve and the second electronic expansion valve are both closed, the first fan is closed, the second cold source performs refrigeration and dehumidification operation, and the second fan performs low-gear operation
When the humidity M0 is not more than M1, controlling the first cold source and the second cold source to be closed, and controlling the first fan and the second fan to be closed;
wherein, the delta T1, the delta T2 and the delta T3 are all preset refrigeration temperature difference thresholds, and the delta T1 is more than the delta T2 is more than the delta T3; m1, M2 and M3 are preset humidity thresholds, and M3> M2> M1.
Preferably, when the air conditioner is in the cooling and humidifying mode, the specific control process includes:
controlling the operation states of the second fan and the humidifying port so that the humidity M0 is between [ M1, M2 ];
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is greater than the delta T1, controlling the first cold source and the second cold source to perform refrigeration operation, opening the first electronic expansion valve and the second electronic expansion valve, and performing high-grade operation on the first fan and the second fan;
when the delta T1 is more than or equal to the delta T and is more than the delta T2, controlling the first cold source to perform independent refrigeration operation and controlling the first fan to perform high-grade operation, and meanwhile, when judging that humidification is not needed, closing the second fan;
when the delta T is less than or equal to the delta T3, controlling the first cold source and the second cold source to be closed, the first electronic expansion valve and the second electronic expansion valve to be closed, closing the first fan, and closing the second fan when judging that humidification is not needed;
wherein, the delta T1, the delta T2 and the delta T3 are all preset refrigeration temperature difference thresholds, and the delta T1 is more than the delta T2 is more than the delta T3; m1, M2 and M3 are preset humidity thresholds, and M3> M2> M1.
Preferably, when the air conditioner is in a heating and dehumidifying mode, the specific control process includes:
when the humidity M0 is more than or equal to M2, controlling a second cold source to perform refrigeration operation and a second fan to perform low-grade operation, and controlling the second cold source and the second fan to be closed until the humidity M0 is less than or equal to M1;
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is less than delta T6 and the second cold source is refrigeration and dehumidification or the delta T5 is more than or equal to the delta T6, controlling the first cold source to perform heating operation, opening the first electronic expansion valve, closing the second electronic expansion valve and performing high-wind-level operation on the first fan, and closing the first cold source, the second cold source, the first electronic expansion valve, the second electronic expansion valve and the first fan until the delta T is more than or equal to the delta T4;
when the delta T is less than the delta T6 and the second cold source is not refrigeration and dehumidification, controlling the first cold source and the second cold source to perform heating operation, opening the first electronic expansion valve and the second electronic expansion valve, and operating the first fan and the second fan at a high wind gear until the delta T is more than or equal to the delta T4, and closing the first cold source, the second cold source, the first electronic expansion valve, the second electronic expansion valve, the first fan and the second fan;
wherein, the delta T4, the delta T5 and the delta T6 are all preset heating temperature difference thresholds, M1, M2 and M3 are preset humidity thresholds, and the delta T4 is greater than the delta T5 is greater than the delta T6, and M3 is greater than the M2 is greater than the M1.
Preferably, when the air conditioner is in a heating and humidifying mode, the specific control process includes:
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is less than the delta T6, controlling the first cold source and the second cold source to perform heating operation, opening the first electronic expansion valve and the second electronic expansion valve, and operating the first fan and the second fan at a high wind gear;
when the delta T5 is larger than or equal to the delta T6, controlling the first cold source to perform heating operation, opening the first electronic expansion valve and the second electronic expansion valve, and operating the first fan in a high wind gear;
when the delta T is larger than or equal to the delta T4, controlling the first cold source to be closed, closing the first electronic expansion valve and the second electronic expansion valve, and closing the first fan and the second fan;
when the delta T is less than the delta T4 and M0 is less than or equal to M1, controlling the humidifying port to start humidifying;
when the delta T is less than the delta T4 and M0 is more than or equal to M2, controlling the humidifying port to stop humidifying;
wherein, the delta T4, the delta T5 and the delta T6 are all preset heating temperature difference thresholds, the delta T4 is greater than the delta T5 is greater than the delta T6, M1, M2 and M3 are preset humidity thresholds, and M3 is greater than M2 is greater than M1.
The present invention also provides a control apparatus of an air conditioner, comprising:
the humidity acquisition module is used for detecting the indoor environment humidity M0 in real time when the air conditioner operates in refrigeration or heating;
a mode control mode for enabling a dehumidification mode when the humidity M0 is greater than a first humidity threshold M1; when the humidity M0 is less than or equal to a first humidity threshold M1, a humidification mode is initiated.
According to the embodiment of the invention, the indoor heat exchanger is coupled with the double cold sources, the distribution of the refrigerating or heating capacities of the two refrigerating systems is adjusted and the on/off of dehumidification or humidification is controlled according to the change of the actual environment, so that the transmission and the optimized matching of the refrigerating capacity are realized, and the heat and humidity adjusting requirements of the full-climate environment with high temperature, high humidity, low temperature, high humidity and low temperature and low humidity are met. Therefore, the embodiment of the invention can ensure that the air conditioner can process in time when the processing requirement of the damp and hot load of the room changes, so that the temperature and the humidity of the room are always controlled in a comfortable range.
Drawings
FIG. 1 is a schematic view of the operating principle of the air conditioner of the present invention;
FIG. 2 is a functional block diagram of a first embodiment of the air conditioner of the present invention;
fig. 3 is a schematic structural view of a second embodiment of the air conditioner of the present invention;
fig. 4 is a schematic structural view of a third embodiment of the air conditioner of the present invention;
FIG. 5 is a schematic flow chart of a first embodiment of a control method of an air conditioner according to the present invention;
fig. 6 is a flowchart illustrating a control method of an air conditioner according to a second embodiment of the present invention;
FIG. 7 is a schematic flow chart illustrating the control of the fresh air duct according to the real-time detected CO2 concentration in FIG. 6;
FIG. 8 is a schematic control flow chart of the air conditioner in the cooling and dehumidifying mode according to the present invention;
FIG. 9 is a schematic control flow chart of the air conditioner in the cooling and humidifying mode according to the present invention;
FIG. 10 is a schematic control flow chart of the air conditioner in the heating and dehumidifying mode according to the present invention;
FIG. 11 is a schematic control flow chart of the air conditioner in heating and humidifying mode according to the present invention;
fig. 12 is a functional block diagram of a first embodiment of a control apparatus for controlling an air conditioner according to the present invention;
fig. 13 is a functional block diagram of a second embodiment of the control apparatus for controlling an air conditioner according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the specific embodiments in the specification. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the main idea of the present invention is to provide an air conditioner, which includes a cold source a and a cold source B, wherein the cold source a and the cold source B are coupled and matched through an indoor heat exchanger, and according to the change of the actual environment, the distribution of the cooling or heating capacity of two cooling systems is adjusted and the on/off of dehumidification or humidification is controlled, so as to realize the transmission and optimal matching of the cooling capacity, and meet the heat and humidity adjustment requirements of the whole climate environment of high temperature and high humidity, high temperature and low temperature, low temperature and high humidity, and low temperature and low humidity.
Referring to fig. 2, a functional block diagram of an air conditioner according to a first embodiment of the present invention is provided. The air conditioner comprises a first cold source 101, a second cold source 102, a fresh air/humidifying device 104 and a heat exchange device 200. The first cold source 101 is connected to the heat exchanger 200 and the fresh air/humidifier 104, and the second cold source 102 is connected to the fresh air/humidifier 104. The heat exchanging device 200 controls the operation of the fresh air/humidification device 104 by coupling the first cold source 101 and the second cold source 102 based on environmental information, which includes the current environmental temperature and humidity. The first cold source 101 is mainly used for refrigeration or heating of the air conditioner, and when the second cold source 102 cannot meet latent heat load, the first cold source 101 can also be used for dehumidification or humidification of the fresh air/humidification device in an auxiliary manner. The second cold source 102 is mainly used for dehumidification or humidification of the fresh air/humidification device 104, and when the cooling or heating capability of the first cold source 101 is not enough, the second cold source can also be used for auxiliary cooling or heating of the air conditioner. The first cold source 101 is mainly an efficient air conditioner which is used for processing sensible heat load in a room, controlling indoor temperature, controlling evaporation temperature to be higher (generally about 15-20 ℃) and enabling COP value to be more than or equal to 7. The second cold source 102 is an air conditioning system which mainly processes fresh air entering a room and latent heat load in the room, controls the evaporation temperature to be lower (generally about 5-10 ℃), has a COP value equivalent to that of a conventional air conditioner, and has economical cost.
According to the embodiment of the invention, the indoor heat exchanger is coupled with the double cold sources, the distribution of the refrigerating or heating capacities of the two refrigerating systems is adjusted and the on/off of dehumidification or humidification is controlled according to the change of the actual environment, so that the transmission and the optimized matching of the refrigerating capacity are realized, and the heat and humidity adjusting requirements of the full-climate environment with high temperature, high humidity, low temperature, high humidity and low temperature and low humidity are met. Therefore, the embodiment of the invention can ensure that the air conditioner can process in time when the processing requirement of the damp and hot load of the room changes, so that the temperature and the humidity of the room are always controlled in a comfortable range.
Referring to fig. 3, a schematic structural diagram of a second embodiment of the air conditioner of the present invention is provided. In this second embodiment, the heat exchange device 200 is a heat exchange unit 103 in an air-cooled form. The heat exchange unit 103 includes a first fan 1031, an air-cooled heat exchanger 1032, an air duct 1033, and a first electronic expansion valve 1034. The first fan 1031 and the air-cooled heat exchanger 1032 are both disposed in the air duct 1033, and the first electronic expansion valve 1034 is connected to a passage between an air outlet of the first cold source 101 and an air inlet of the air-cooled heat exchanger 1032. The air return opening of the first cold source 101 is communicated with the air outlet of the air-cooled heat exchanger 1032.
The fresh air/humidification device 104 includes a fresh air duct 1041, a ventilation air valve 1042, a return air duct 1043, a second fan 1044, a second cold source evaporator 1045, a first cold source evaporator 1046, a humidification port 1047, a second electronic expansion valve 1048, and a third electronic expansion valve 1049. The ventilation air valve 1042 is connected to a path between the fresh air duct 1041 and the return air duct 1043, and the fresh air duct 1041 and the return air duct 1043 form an air duct of the fresh air/humidification device 104. The second fan 1044, the second cold source evaporator 1045, the first cold source evaporator 1046 and the humidifying port 1047 are all arranged in the air duct. The second electronic expansion valve 1048 is connected to a path between the exhaust port of the first cool source 101 and the intake port of the first cool source evaporator 1046. The air return opening of the first cold source 101 is also communicated with the air outlet of the first cold source evaporator 1046. The exhaust port of the second cold source 102 communicates with the intake port of the second cold source evaporator 1045, and a third electronic expansion valve 1049 is disposed on the path. The air return port of the second cold source 102 is communicated with the air outlet of the second cold source evaporator 1045.
Referring to fig. 4, a schematic structural diagram of a third embodiment of the air conditioner of the present invention is provided. The third embodiment is different from the second embodiment only in that the heat exchange means 200 in this embodiment is a water-cooled type heat exchange unit 105. The heat exchange unit 105 includes a water evaporator 1051, a water pump 1052, a water tank 1053, a water inlet valve 1054, a water return valve 1055, and a fourth electronic expansion valve 1056. Wherein, the air inlet of the water evaporator 1051 is connected with the air outlet of the first cold source 101, and the fourth electronic expansion valve 1056 is connected on the channel; the air outlet of the water evaporator 1051 is communicated with the air return opening of the first cold source 101. The water inlet pipe of the water evaporator 1051 is connected with a water inlet valve 1054, and the water outlet pipe of the water evaporator 1051 is sequentially connected with a water pump 1052, a water tank 1053 and a water outlet valve 1055. The tail ends of the water outlet pipe and the water inlet pipe are both connected with the radiation tail end.
In this embodiment, the structure of the fresh air/humidification device 104 is the same as that of the fresh air/humidification device in the second embodiment, and is not described herein again.
Based on the structure of the air conditioner, the invention provides a first embodiment of a control method of the air conditioner. As shown in fig. 5, the control method of the air conditioner includes:
step S110, detecting the indoor environment humidity M0 in real time when the air conditioner operates in a refrigerating or heating mode;
step S120, judging whether M0 is larger than a preset first humidity threshold M1; if yes, go to step S130, otherwise go to step S140;
step S130, starting a dehumidification mode;
step S140, the humidification mode is started.
The embodiment of the invention is used for detecting the indoor environment humidity M0 in real time through the humidity sensor. The detected indoor environment M0 is then compared with a set first humidity threshold M1, and a dehumidification mode or a humidification mode is activated according to the comparison result. Therefore, the embodiment of the invention can ensure that the air conditioner can process in time when the processing requirement of the damp and hot load of the room changes, so that the temperature and the humidity of the room are always controlled in a comfortable range.
Further, referring to fig. 6, a second embodiment of a control method of an air conditioner according to the present invention is provided. In the control method of the air conditioner, the control method of the air conditioner in the above embodiment further includes:
and S100, detecting the concentration of CO2 in the indoor environment, and controlling the opening or closing of the fresh air channel according to the change of the concentration of CO 2.
During the operation of the air conditioner, the CO2 concentration in the indoor environment can be detected. Specifically, a CO2 concentration sensor may be disposed in the indoor environment to detect the CO2 concentration in the indoor environment. The CO2 concentration sensor may be provided in plurality to improve the detection accuracy of the CO2 concentration in the indoor environment. In this embodiment, a comfortable range value [ Q2, Q1] is set, and after the air conditioner is started, the opening or closing of the fresh air duct is controlled. In this embodiment, the step S100 is before the step S110. It will be understood that it is only one example and does not limit the scope of the invention. This step S100 may be located before or after the other steps. As shown in fig. 7, the specific control procedure in step S100 is as follows:
s101, detecting the concentration Q0 of CO2 in the indoor environment in real time;
s102, judging that Q0 is more than or equal to Q1; if yes, the step S103 is executed, otherwise, the step S104 is executed;
s103, controlling a ventilation air valve to open a fresh air duct and a return air duct;
s104, judging that Q0 is not more than Q2; if yes, the procedure goes to step S105, otherwise, the procedure is ended;
and S105, controlling a ventilation air valve to open a fresh air duct and close a return air duct.
When the concentration of CO2 in the indoor environment reaches the upper limit Q1 for people to feel comfortable, the ventilation air valve 1042 is controlled to open the fresh air channel so as to improve the air freshness of the indoor environment; when the concentration of CO2 in the indoor environment reaches the lower limit Q2 for people to feel comfortable, the fresh air duct is closed to avoid the increase of indoor heat and humidity load by fresh air.
In the above embodiments, the air conditioner operates in a heating or cooling mode, and in the subsequent control process, the dehumidification or humidification process is started according to the humidity change of the indoor environment. Thus, the air conditioner will operate in one of four modes: refrigeration dehumidification, refrigeration humidification, heating dehumidification, four modes of heating humidification. Specific control procedures of various modes will be described below by taking the structure of the second embodiment as an example.
Code number description:
ts-set target operating temperature, default when not set.
T0 — ambient indoor temperature collected by the sensor.
Δ T — the temperature difference between the indoor ambient temperature T0 and the set target operating temperature Ts.
Delta T1, delta T2 and delta T3 are preset refrigeration temperature difference thresholds, wherein delta T1 is more than delta T2 is more than delta T3, and delta T1 is a temperature difference point of the environment temperature and the set temperature.
Delta T4, delta T5 and delta T6 as preset heating temperature difference thresholds, wherein delta T4 is more than delta T5 is more than delta T6, and delta T4 is a temperature difference point of the environment temperature and the set temperature.
M0 — indoor ambient humidity collected by the sensor.
M1, M2 and M3 — preset first humidity threshold, second humidity threshold and third humidity threshold, where M3> M2> M1, the relative humidity of the indoor environment is M2 to M1, people feel comfortable, and the relative humidity M3 of the indoor environment is very humid, people feel uncomfortable, and it is necessary to enhance dehumidification, for example: at room temperature T0 of 15-20 deg., the relative humidity range for people is 45-65%. Thus, room temperature at 15 ° to 20 ° may define a relative humidity of 45% for M1, 65% for M2, and 70% for M3. Since the relative humidity range comfortable for human beings is different in different temperature ranges, the value of Mx should be changed according to the change of T0, which is not limited herein.
Q0 — ambient indoor CO2 concentration collected by the sensor.
Q1, Q2-upper and lower limits of comfort for a person.
Refrigeration and dehumidification mode
As shown in fig. 8, the specific control process of the cooling and dehumidifying mode includes:
step S201, detecting indoor environment temperature T0 in real time; in this embodiment, a temperature sensor is provided indoors to detect the indoor ambient temperature T0 in real time.
S202, judging whether T0-Ts is larger than delta T1; if yes, the step S203 is executed, otherwise, the step S204 is executed;
step S203, the first cold source 101 and the second cold source 102 both perform cooling operation, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both opened, the first fan 1031 and the second fan 1044 both perform high-wind-level operation, and go to step S210;
step S204, judging whether T0-Ts is more than delta T2 and less than or equal to delta T1; if yes, go to step S205, otherwise go to step S210;
step S205, performing cooling operation on the first cold source 101, performing high-wind-level operation on the first fan 1031, and going to step S206;
step S206, judging whether the indoor environment humidity M0 detected in real time is greater than or equal to M2; if yes, go to step S207, otherwise go to step S208;
step S207, the second cold source 102 starts refrigeration and dehumidification, the second fan 1044 runs in a high wind gear, and the process goes to step S208;
step S208, judging whether the humidity M0 is less than or equal to M1; if yes, go to step S209, otherwise go to step S210;
step S209, the second cold source 102 is turned off, the second fan 1044 is turned off, and the process goes to step S210;
step S210, judging whether T0-TS is larger than or equal to delta T3; if yes, the flow is ended, otherwise, the flow goes to step S211;
step S211, judging whether the humidity M0 is greater than or equal to M3; if yes, go to step S212, otherwise go to step S213;
step S212, the first cold source 101 and the second cold source 102 both perform cooling operation, the first electronic expansion valve 1034 is closed, the second electronic expansion valve 1048 is opened, the first fan 1031 is closed, the second fan 1044 performs low-wind operation, and the process goes to step S215;
step S213, judging whether the humidity M0 is greater than or equal to M2 and less than M3; if yes, go to step S214, otherwise go to step S215;
step S214, the first cold source 101 is closed, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both closed, the first fan 1031 is closed, the second cold source 102 performs refrigeration and dehumidification operation, and the second fan 1044 performs low wind speed operation;
step S215, judging whether the humidity M0 is less than or equal to M1; if yes, go to step S216, otherwise, end the present procedure;
step S216, turning off both the first cold source 101 and the second cold source 102, turning off both the first fan 1031 and the second fan 1044, and ending the process.
(II) refrigeration and humidification mode
As shown in fig. 9, the specific control process of the cooling and humidifying mode includes:
step S301, judging whether the humidity M0 of the indoor environment detected in real time is less than or equal to M1; if yes, the step S302 is executed, otherwise, the step S303 is executed;
step S302, the second fan 1044 runs at a high wind gear, and the humidifying port 1047 starts humidifying;
step S303, judging whether M0 is greater than or equal to M2; if yes, go to step S304, otherwise go to step S305;
step S304, the humidification port 1047 stops the humidification, and the process goes to step S305;
it is possible to control the relative humidity of the indoor environment to be maintained between M2 and M1 where people feel comfortable through steps S301 to S304.
Step S305, detecting indoor environment humidity T0 in real time;
s306, judging whether T0-Ts is larger than delta T1; if yes, go to step S307, otherwise go to step S308;
step S307, the first cold source 101 and the second cold source 102 both perform cooling operation, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 both open, the first fan 1031 and the second fan 1044 both perform high-wind-level operation, and go to step S312;
step S308, judging whether T0-Ts is more than delta T2 and less than or equal to delta T1; if yes, go to step S312, otherwise go to step S309;
step S309, the first cold source 101 performs cooling operation, the first electronic expansion valve 1034 is opened, the second electronic expansion valve 1048 is closed, the first fan 1031 performs high-wind-shift operation, and the process goes to step S310;
step S310, judging whether humidification is performed or not; if yes, go to step S311, otherwise go to step S312;
step S311, the second fan 1044 is turned off, and the process goes to step S312;
step S312, judging whether T0-Ts is less than or equal to delta T3; if yes, go to step S313, otherwise, end the procedure;
step S313, closing the first cold source 101 and the second cold source 102, closing the first electronic expansion valve 1034 and the second electronic expansion valve 1048, closing the first fan 1031, and going to step S314;
step S314, judging whether humidification is performed or not; if yes, the flow is ended, otherwise, the step S315 is carried out;
and step S315, the second fan 1044 is turned off, and the process is ended.
(III) heating and dehumidifying mode
As shown in fig. 10, the specific control process of the heating and dehumidifying mode includes:
step S401, judging whether the humidity M0 of the indoor environment detected in real time is greater than or equal to M2; if yes, the step S402 is executed, otherwise, the step S403 is executed;
step S402, the second cold source 102 operates in a refrigerating mode, and the second fan 1044 operates in a low wind gear;
step S403, judging whether the humidity M0 is less than or equal to M1; if yes, the step S404 is executed, otherwise, the step S405 is executed;
step S404, the second cold source 102 is turned off, the second fan 1044 is turned off, and the process goes to step S405;
step S405, detecting the indoor environment temperature T0 in real time;
step S406, judging whether T0-Ts is smaller than delta T6; if yes, the step is shifted to step S408, otherwise, the step is shifted to step S407;
step S407, judging whether T0-Ts is more than or equal to delta T6 and less than delta T5; if yes, the step S409 is executed, otherwise, the step S410 is executed;
step S408, judging whether the second cold source 102 is refrigerating and dehumidifying; if yes, the step S409 is executed, otherwise, the step S412 is executed;
step S409, the first cold source 101 heats, the first electronic expansion valve 1034 is opened, the second electronic expansion valve 1048 is closed, the first fan 1044 runs in a high wind gear, and the process goes to step S410;
step S410, judging whether T0-Ts is more than or equal to delta T4; if yes, the procedure goes to step S411, otherwise, the procedure is ended;
step S411, the first cold source 101 and the second cold source 102 are both closed, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both closed, the first fan 1031 is closed, and the process is ended;
step S412, the first cold source 101 and the second cold source 102 both perform heating operation, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both closed, the first fan 1031 and the second fan 1044 both perform high-wind-level operation, and go to step S413;
step S413, judging whether T0-Ts is larger than or equal to delta T4; if yes, go to step S414, otherwise, end the process;
in step S414, the first cold source 101 and the second cold source 102 are both closed, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both closed, the first fan 1031 and the second fan 1044 are both closed, and the process is ended.
(IV) heating and humidifying mode
As shown in fig. 11, the specific control process of the heating and humidifying mode includes:
step S501, detecting indoor environment temperature T0 in real time;
s502, judging whether T0-Ts is smaller than delta T6; if yes, the step S505 is executed, otherwise, the step S503 is executed;
step S503, judging whether T0-Ts is more than or equal to delta T6 and less than delta T5; if yes, go to step S504, otherwise go to step S506;
step S504, the first cold source 101 heats, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both opened, the first fan 1031 runs in high wind, and the process goes to step S506;
step S505, the first cold source 101 and the second cold source 102 both perform heating operation, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both opened, and the first fan 1031 and the second fan 1044 both perform high-wind-level operation;
step S506, judging whether T0-Ts is more than or equal to delta T4; if yes, go to step S511, otherwise go to step S507;
step S507, judging whether the humidity M0 of the indoor environment detected in real time is less than or equal to M1; if yes, go to step S508, otherwise go to step S509;
step S508, starting humidification through a humidification port 1047;
step S509, judging whether the humidity M0 is greater than or equal to M2; if yes, go to step S510, otherwise, end the process;
step S510, stopping the humidification at the humidification port 1047, and ending the flow;
step S511, the first cold source 101 is closed, the first electronic expansion valve 1034 and the second electronic expansion valve 1048 are both closed, the first fan 1031 and the second fan 1044 are both closed, and the process is ended.
Referring to fig. 12, the present invention also provides a first embodiment of a control device for controlling the air conditioner, corresponding to the control method. The control device includes:
the humidity obtaining module 110 is configured to obtain indoor environment humidity M0 in real time;
the mode control module 120 is used for judging whether M0 is greater than a first preset humidity M1, and starting a dehumidification mode when M0 is greater than M1; and when M0 is less than or equal to M1, starting the humidifying mode.
The humidity obtaining module 110 is used for detecting the indoor environment humidity M0 in real time in the embodiment of the invention. Preferably, the humidity acquisition module 110 may be a humidity sensor. The control module 120 then compares the detected indoor ambient humidity M0 with a set first preset humidity M1, and activates the dehumidification mode or the humidification mode according to the comparison result. Therefore, the embodiment of the invention can ensure that the air conditioner can process in time when the processing requirement of the damp and hot load of the room changes, so that the temperature and the humidity of the room are always controlled in a comfortable range.
In the above embodiments, the air conditioner operates in a heating or cooling mode, and in the subsequent control process, the dehumidification or humidification process is started according to the humidity change of the indoor environment. Thus, the air conditioner will operate in one of four modes: refrigeration dehumidification, refrigeration humidification, heating dehumidification, four modes of heating humidification. Therefore, in the four modes, the mode control module 120 will control the air conditioner to operate in the corresponding states. For the specific control process, reference may be made to the foregoing method embodiments, and details are not repeated here.
Referring to fig. 13, based on the above embodiment, the present invention further provides a second embodiment of a control apparatus for an air conditioner. The control device of the air conditioner of this embodiment further includes:
a CO2 concentration obtaining module 130 for detecting the CO2 concentration of the indoor environment in real time;
and the fresh air control module 140 is used for controlling the opening or closing of the fresh air duct according to the change of the concentration of the CO 2.
When the air conditioner is started, the CO2 concentration obtaining module 130 detects the CO2 concentration of the indoor environment in real time. In this embodiment, the CO2 concentration obtaining module 130 may be specifically a CO2 concentration sensor disposed in the indoor environment, and is used to detect the CO2 concentration in the indoor environment. The CO2 concentration sensor may be provided in plurality to improve the detection accuracy of the CO2 concentration in the indoor environment. In the embodiment, a comfortable range value [ Q2, Q1] is also set, and after the air conditioner is started, the opening or closing of the fresh air duct is controlled, so that the concentration of CO2 in the indoor environment is kept between [ Q2, Q1 ]. The method specifically comprises the following steps: when the concentration of CO2 in the indoor environment reaches the upper limit Q1 for people to feel comfortable, the ventilation air valve 1042 is controlled to open the fresh air channel so as to improve the air freshness of the indoor environment; when the concentration of CO2 in the indoor environment reaches the lower limit Q2 for people to feel comfortable, the fresh air duct is closed to avoid the increase of indoor heat and humidity load by fresh air.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes that can be directly or indirectly applied to other related technical fields using the contents of the present specification and the accompanying drawings are included in the scope of the present invention.
Claims (8)
1. An air conditioner is characterized by comprising a first cold source, a second cold source, a fresh air/humidifying device and a heat exchange device; the first cold source is respectively connected with the heat exchange device and the fresh air/humidification device, the second cold source is connected with the fresh air/humidification device, the heat exchange device controls the operation of the fresh air/humidification device through coupling of the first cold source and the second cold source based on environment information, and the environment information comprises current environment temperature and humidity; wherein,
the fresh air/humidifying device comprises a fresh air pipe, a ventilation air valve, a return air pipe, a second fan, a second cold source evaporator, a first cold source evaporator, a humidifying port, a second electronic expansion valve and a third electronic expansion valve; the fresh air pipe and the return air pipe form an air pipe of a fresh air/humidifying device; the second fan, the second cold source evaporator, the first cold source evaporator and the humidifying port are all arranged in the air pipe; the second electronic expansion valve is connected to a passage between the exhaust port of the first cold source and the air inlet of the first cold source evaporator; the air return port of the first cold source is also communicated with the air outlet of the first cold source evaporator; the air outlet of the second cold source is communicated with the air inlet of the second cold source evaporator, and the third electronic expansion valve is arranged on the passage; and the air return port of the second cold source is communicated with the air outlet of the second cold source evaporator.
2. The air conditioner of claim 1, wherein the heat exchanging device comprises a first fan, an air-cooled heat exchanger, an air pipe and a first electronic expansion valve; the first fan and the air-cooled heat exchanger are both arranged in the air duct, and the first electronic expansion valve is connected to a passage between an exhaust port of the first cold source and an air inlet of the air-cooled heat exchanger; and the air return port of the first cold source is communicated with the air outlet of the air-cooled heat exchanger.
3. The air conditioner of claim 1, wherein the heat exchanging means comprises a water evaporator, a water pump, a water tank, a water inlet valve, a water return valve, a fourth electronic expansion valve; wherein, the air inlet of the water evaporator is communicated with the air outlet of the second cold source, and the fourth electronic expansion valve is connected on the passage; the air outlet of the water evaporator is communicated with the air return port of the second cold source; the water inlet valve is connected to a water inlet pipe of the water evaporator, and the water pump, the water tank and the water outlet valve are sequentially connected to a water outlet pipe of the water evaporator.
4. A control method of an air conditioner, characterized in that the air conditioner is the air conditioner of claim 1; the control method of the air conditioner comprises the following steps:
when the air conditioner operates in a refrigerating or heating mode, detecting the indoor environment humidity M0 in real time;
judging whether the humidity M0 is greater than a preset first humidity threshold M1;
when the humidity M0> M1, starting a dehumidification mode;
and when the humidity M0 is less than or equal to M1, starting a humidifying mode.
5. The method for controlling the air conditioner according to claim 4, wherein when the air conditioner is in a cooling and dehumidifying mode, the specific control process comprises:
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is greater than the delta T1, controlling the first cold source and the second cold source to perform refrigeration operation, opening the first electronic expansion valve and the second electronic expansion valve, and performing high-grade operation on the first fan and the second fan;
when the delta T1 is more than or equal to the delta T2, controlling a first cold source to perform independent refrigeration operation and a first fan to perform high-grade operation, and simultaneously controlling a second cold source to start refrigeration and dehumidification and a second fan to perform high-grade operation when the humidity M0 is more than or equal to M2, and turning off the second cold source and the second fan until the humidity M0 is less than or equal to M1;
when the delta T is less than or equal to the delta T3, comparing the humidity M0 with a preset first humidity threshold value M1, a preset second humidity threshold value M2 and a preset third humidity threshold value M3;
when the humidity M0 is greater than or equal to M3, controlling the first cold source and the second cold source to perform refrigeration operation, closing the first electronic expansion valve, opening the second electronic expansion valve, closing the first fan and performing low-grade operation on the second fan;
when M3 is more than M0 and is more than or equal to M2, the first cold source is controlled to be closed, the first electronic expansion valve and the second electronic expansion valve are both closed, the first fan is closed, the second cold source performs refrigeration and dehumidification operation, and the second fan performs low-gear operation
When the humidity M0 is not more than M1, controlling the first cold source and the second cold source to be closed, and controlling the first fan and the second fan to be closed;
wherein, the delta T1, the delta T2 and the delta T3 are all preset refrigeration temperature difference thresholds, and the delta T1 is more than the delta T2 is more than the delta T3; m1, M2 and M3 are preset humidity thresholds, and M3> M2> M1.
6. The method for controlling the air conditioner according to claim 4, wherein when the air conditioner is in a cooling and humidifying mode, the specific control process comprises:
controlling the operation states of the second fan and the humidifying port so that the humidity M0 is between [ M1, M2 ];
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is greater than the delta T1, controlling the first cold source and the second cold source to perform refrigeration operation, opening the first electronic expansion valve and the second electronic expansion valve, and performing high-grade operation on the first fan and the second fan;
when the delta T1 is more than or equal to the delta T and is more than the delta T2, controlling the first cold source to perform independent refrigeration operation and controlling the first fan to perform high-grade operation, and meanwhile, when judging that humidification is not needed, closing the second fan;
when the delta T is less than or equal to the delta T3, controlling the first cold source and the second cold source to be closed, the first electronic expansion valve and the second electronic expansion valve to be closed, closing the first fan, and closing the second fan when judging that humidification is not needed;
wherein, the delta T1, the delta T2 and the delta T3 are all preset refrigeration temperature difference thresholds, and the delta T1 is more than the delta T2 is more than the delta T3; m1, M2 and M3 are preset humidity thresholds, and M3> M2> M1.
7. The method for controlling the air conditioner according to claim 4, wherein when the air conditioner is in a heating and dehumidifying mode, the specific control process comprises:
when the humidity M0 is more than or equal to M2, controlling a second cold source to perform refrigeration operation and a second fan to perform low-grade operation, and controlling the second cold source and the second fan to be closed until the humidity M0 is less than or equal to M1;
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is less than delta T6 and the second cold source is refrigeration and dehumidification or the delta T5 is more than or equal to the delta T6, controlling the first cold source to perform heating operation, opening the first electronic expansion valve, closing the second electronic expansion valve and performing high-wind-level operation on the first fan, and closing the first cold source, the second cold source, the first electronic expansion valve, the second electronic expansion valve and the first fan until the delta T is more than or equal to the delta T4;
when the delta T is less than the delta T6 and the second cold source is not refrigeration and dehumidification, controlling the first cold source and the second cold source to perform heating operation, opening the first electronic expansion valve and the second electronic expansion valve, and operating the first fan and the second fan at a high wind gear until the delta T is more than or equal to the delta T4, and closing the first cold source, the second cold source, the first electronic expansion valve, the second electronic expansion valve, the first fan and the second fan;
wherein, the delta T4, the delta T5 and the delta T6 are all preset heating temperature difference thresholds, and the delta T4 is more than the delta T5 is more than the delta T6; m1, M2 and M3 are preset humidity thresholds, and M3 is more than M2 is more than M1.
8. The method for controlling the air conditioner according to claim 4, wherein when the air conditioner is in a heating and humidifying mode, the specific control process comprises:
detecting the temperature T0 of the indoor environment in real time, and calculating the temperature difference delta T between the temperature T0 and the target temperature Ts as T0-Ts;
when the delta T is less than the delta T6, controlling the first cold source and the second cold source to perform heating operation, opening the first electronic expansion valve and the second electronic expansion valve, and operating the first fan and the second fan at a high wind gear;
when the delta T5 is larger than or equal to the delta T6, controlling the first cold source to perform heating operation, opening the first electronic expansion valve and the second electronic expansion valve, and operating the first fan in a high wind gear;
when the delta T is larger than or equal to the delta T4, controlling the first cold source to be closed, closing the first electronic expansion valve and the second electronic expansion valve, and closing the first fan and the second fan;
when the delta T is less than the delta T4 and M0 is less than or equal to M1, controlling the humidifying port to start humidifying;
when the delta T is less than the delta T4 and M0 is more than or equal to M2, controlling the humidifying port to stop humidifying;
wherein, the delta T4, the delta T5 and the delta T6 are all preset heating temperature difference thresholds, the delta T4 is greater than the delta T5 is greater than the delta T6, M1, M2 and M3 are preset humidity thresholds, and M3 is greater than M2 is greater than M1.
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| CN105240934A (en) * | 2015-09-28 | 2016-01-13 | 南京科技职业学院 | New air control system and control method thereof |
| JP6685418B2 (en) * | 2016-10-24 | 2020-04-22 | 三菱電機株式会社 | Air conditioning system, air conditioning controller, air conditioning method and program |
| CN108844194B (en) * | 2018-06-19 | 2019-11-08 | 珠海格力电器股份有限公司 | Humidification control method, device and equipment |
| CN108981070A (en) * | 2018-07-13 | 2018-12-11 | 珠海格力电器股份有限公司 | Air conditioner and control method and device |
| CN109140630A (en) * | 2018-08-15 | 2019-01-04 | 珠海格力电器股份有限公司 | Air conditioning system, temperature adjustment and humidity adjustment control method |
| CN113357716B (en) * | 2021-06-18 | 2022-08-19 | 龙岩烟草工业有限责任公司 | Control method and controller for constant temperature and humidity system and constant temperature and humidity system |
| CN114110980B (en) * | 2021-11-24 | 2023-11-28 | 广东美的制冷设备有限公司 | Fresh air equipment control method and device, fresh air equipment and storage medium |
| CN116447721A (en) * | 2021-11-24 | 2023-07-18 | 美的集团武汉制冷设备有限公司 | Control method, device and equipment of fresh air equipment and storage medium |
| CN114061095B (en) * | 2021-11-24 | 2023-09-26 | 广东美的制冷设备有限公司 | Fresh air equipment control method and device, fresh air equipment and storage medium |
| CN114061260A (en) * | 2021-11-30 | 2022-02-18 | 青岛海尔特种电冰柜有限公司 | Humidity control method of refrigeration equipment |
| CN114234417A (en) * | 2021-12-08 | 2022-03-25 | 广东美的制冷设备有限公司 | Fresh air equipment, control method thereof and computer-readable storage medium |
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Effective date of registration: 20190110 Address after: 528400 West 59 Nantou Avenue, Nantou Town, Zhongshan City, Guangdong Province (1st floor, 2nd floor) Patentee after: Guangdong TCL intelligent HVAC Equipment Co., Ltd. Address before: 528427 Nantou Avenue, Nantou Town, Zhongshan City, Guangdong Province Patentee before: TCL Air Conditioner (Zhongshan) Co., Ltd. |