CN115899959A - Air conditioner control system and method and air conditioner - Google Patents
Air conditioner control system and method and air conditioner Download PDFInfo
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- CN115899959A CN115899959A CN202211494497.8A CN202211494497A CN115899959A CN 115899959 A CN115899959 A CN 115899959A CN 202211494497 A CN202211494497 A CN 202211494497A CN 115899959 A CN115899959 A CN 115899959A
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention discloses an air conditioner control system, an air conditioner control method and an air conditioner, wherein the air conditioner control system comprises an indoor unit control module, an outdoor unit control port and an indoor and outdoor unit communication module; in the heating mode, the indoor unit control module is used for sending a first compressor control signal to the outdoor unit control port through the indoor and outdoor unit communication module when the first working temperature of the evaporator is greater than or equal to a first preset temperature; the outdoor unit control module is used for controlling the stop of the outer fan when the first compressor control signal is detected by the inner and outer unit communication module; according to the invention, the control signal is sent to the outdoor unit in advance when the load of the indoor unit is abnormal, so that the stop of the outer fan is controlled, and the problem of repeated start and stop is avoided.
Description
Technical Field
The application relates to the technical field of display, in particular to an air conditioner control system and method and an air conditioner.
Background
The air conditioner generally comprises an outdoor unit and an indoor unit, when the indoor unit and the outdoor unit of the air conditioner are controlled by using a 24V signal, the indoor unit of the air conditioner can be matched with any outdoor unit for use, and the indoor unit of the air conditioner can realize the on-off control of the outdoor unit by using the 24V control signal.
However, because the indoor unit and the outdoor unit cannot communicate data, the operating parameters of the indoor unit and the outdoor unit are unknown, which results in unreasonable control. For example, when the load of the indoor unit system is abnormal, the outdoor unit cannot be protected in advance because the operation parameters of the indoor unit are not known, and can only be directly shut down, so that the air conditioner can be repeatedly turned on and shut down, and the comfort of the air conditioner is finally affected.
Disclosure of Invention
The invention aims to provide an air conditioner control system, an air conditioner control method and an air conditioner, which can send a control signal to an outdoor unit in advance when an indoor unit has abnormal load so as to control an external fan to stop and avoid the problem of repeated start and stop.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the application provides an air conditioner control system, which comprises an indoor unit control module, an outdoor unit control port and an indoor and outdoor unit communication module, wherein the indoor unit control module is connected with the indoor and outdoor unit communication module;
when the heating module is in a heating mode, the indoor unit control module is used for sending a first compressor control signal to the outdoor unit control port through the indoor and outdoor unit communication module when the first working temperature of the evaporator is greater than or equal to a first preset temperature;
the outdoor unit control module is used for controlling the outer fan to stop when detecting a first compressor control signal through the inner and outer unit communication module.
In some embodiments of the air conditioner control system, in the heating mode, the indoor unit control module is further configured to send a second compressor control signal to the outdoor unit control port through the indoor unit communication module when the first operating temperature is greater than or equal to a second preset temperature; wherein the second preset temperature is greater than the first preset temperature;
the outdoor unit control module is also used for controlling the stop of the outer fan and reducing the frequency of the compressor by a first preset value when the inner and outer unit communication module detects a second compressor control signal.
In some embodiments of the air conditioner control system, in the cooling mode, the indoor unit control module is further configured to send a second compressor control signal to the outdoor unit control port through the indoor and outdoor unit communication module when the second operating temperature of the evaporator is less than or equal to a third preset temperature; the outdoor unit control module is also used for reducing the frequency of the compressor by a second preset value according to a second compressor control signal.
In some embodiments of the air conditioner control system, when the air conditioner is in the heating mode and the external air is turned off, the indoor unit control module is further configured to send a first compressor control signal to the outdoor unit control port through the indoor and outdoor unit communication module when the first operating temperature is lower than a fourth preset temperature; wherein the fourth preset temperature is lower than the first preset temperature;
the outdoor unit control module is also used for controlling the starting of the outer fan when the first compressor control signal is detected again through the inner and outer unit communication module.
In some embodiments of the air conditioner control system, when the air conditioner is in the heating mode and the external air conditioner is turned off, the indoor unit control module is further configured to send a second compressor control signal to the outdoor unit control port through the indoor unit communication module when the first operating temperature is lower than a fifth preset temperature; wherein the fifth preset temperature is lower than the fourth preset temperature;
the outdoor unit control module is also used for controlling the starting of the outer fan and recovering the frequency of the compressor when the second compressor control signal is detected again through the inner and outer unit communication module.
In some embodiments of the air conditioner control system, in the cooling mode, the indoor unit control module is further configured to send a second compressor control signal to the outdoor unit control port through the indoor unit communication module when the second operating temperature is higher than a sixth preset temperature; the outdoor unit control module is also used for controlling the starting of the external fan and controlling the frequency recovery of the compressor when the internal and external unit communication module detects a second compressor control signal; wherein the sixth preset temperature is greater than the third preset temperature.
In some embodiments of the air conditioner control system, the indoor and outdoor unit communication module includes an indoor unit communication unit and an outdoor unit communication unit; the indoor unit communication unit is respectively connected with the indoor unit control module and the outdoor unit control port, and the outdoor unit communication unit is respectively connected with the outdoor unit control port and the outdoor unit control module;
the indoor unit communication unit is used for outputting a first compressor control signal or a second compressor control signal to the outdoor unit control port;
the outdoor unit communication unit is used for outputting the first compressor control signal or the second compressor control signal to the outdoor unit control module.
The embodiment of the application also provides an air conditioner control method, wherein the air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises an evaporator, the outdoor unit comprises an outdoor unit control port, and the air conditioner control method comprises the following steps:
when the air conditioner is in a heating mode, detecting a first working temperature of an evaporator;
when the first working temperature is greater than or equal to a first preset temperature, sending a first compressor control signal to an outdoor unit control port to control an external fan of the outdoor unit to stop;
when the first working temperature is higher than or equal to a second preset temperature, sending a second compressor control signal to the outdoor unit control port to control the stop of the external fan and reduce the frequency of the compressor of the outdoor unit by a first preset value; wherein the second preset temperature is higher than the first preset temperature.
In some embodiments, the air conditioner control method further comprises:
detecting a second working temperature of the evaporator when the air conditioner is in a refrigeration mode;
and when the second working temperature is less than or equal to the third preset temperature, sending a second compressor control signal to the outdoor unit control port to control the frequency of the compressor to reduce the second preset value.
The embodiment of the application also provides an air conditioner which comprises the air conditioner control system.
Compared with the prior art, the invention provides an air conditioner control system, an air conditioner control method and an air conditioner, when the air conditioner is in a heating mode and the temperature overload of an evaporator in an indoor unit is greater than or equal to a first preset temperature, a control signal is sent to an outdoor unit in advance through the indoor unit so as to control an external fan to be turned off, and the air conditioner enters a protection state; therefore, compared with the scheme that the outdoor unit uses the pressure sensor or the pressure switch protector, the outdoor unit is controlled to be turned off in advance when the load is abnormal, and the problem that the air conditioner is repeatedly turned on and off due to the fact that the load is increased is solved.
Drawings
Fig. 1 is a block diagram of an air conditioner control system according to the present invention.
Fig. 2 is a block diagram of a communication module between an internal machine and an external machine in the air conditioner control system according to the present invention.
Fig. 3 is a structural diagram of an indoor unit communication unit and an outdoor unit control port in the air conditioner control system according to the present invention.
Fig. 4 is a structural diagram of an outdoor unit communication unit and an outdoor unit control port in the air conditioner control system according to the present invention.
Fig. 5 is a schematic protection diagram of the air conditioner control system in the heating mode according to the present invention.
Fig. 6 is a timing diagram of a four-way valve control signal, a first compressor control signal and a second compressor control signal in a heating mode of the air conditioner control system according to the present invention.
Fig. 7 is a schematic protection diagram of the air conditioner control system in the cooling mode according to the present invention.
Fig. 8 is a timing diagram of a four-way valve control signal and a second compressor control signal of the air conditioner control system in the cooling mode according to the present invention.
Fig. 9 is a flowchart illustrating an embodiment of a method for controlling an air conditioner according to the present invention.
Fig. 10 is a flowchart illustrating another embodiment of a method for controlling an air conditioner according to the present invention.
Detailed Description
In view of the defects in the prior art, the invention aims to provide an air conditioner control system, an air conditioner control method and an air conditioner, which can send a control signal to an outdoor unit in advance when the load of an indoor unit is abnormal so as to control an outer fan to stop and avoid the problem of repeated start and stop.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1, the air conditioner control system according to the present invention includes an indoor unit control module 10, an outdoor unit control module 20, an outdoor unit control port 30, and an indoor and outdoor unit communication module 40, wherein the indoor unit control module 10 is connected to the indoor and outdoor unit control module, and the indoor and outdoor unit communication module 40 is further connected to the outdoor unit control port 30 and the outdoor unit control module 20.
When the air conditioner is in the heating mode, the indoor unit control module 10 is configured to send a first compressor control signal to the outdoor unit control port 30 through the indoor unit communication module 40 when a first working temperature of the evaporator is greater than or equal to a first preset temperature; the outdoor unit control module 20 is used for controlling the stop of the outer fan when the first compressor control signal is detected by the indoor and outdoor unit communication module 40. When the air conditioner is in a heating mode, and the temperature of an evaporator in the indoor unit is overloaded, namely is greater than or equal to a first preset temperature, a control signal is sent to the outdoor unit in advance through the indoor unit so as to control the shutdown of the external fan and enable the air conditioner to enter a protection state; therefore, compared with the scheme that the outdoor unit uses the pressure sensor or the pressure switch protector, the outdoor unit is controlled to be closed in advance when the load is abnormal, and the problem that the air conditioner is repeatedly started and stopped due to the fact that the load is rush is avoided.
In some embodiments, when the air conditioner is in the heating mode, the indoor unit control module 10 is further configured to send a second compressor control signal to the outdoor unit control port 30 through the outdoor unit communication module 40 when the first operating temperature is greater than or equal to a second preset temperature; the outdoor unit control module 20 is further configured to control the external fan to stop and reduce the frequency of the compressor by the first preset value when the second compressor control signal is detected by the internal and external unit communication module 40, so that the compressor operates at a low frequency and the air conditioner is controlled to enter a protection mode.
And controlling the outer fan to shut down when the second preset temperature is higher than the first preset temperature, namely when the first working temperature of the evaporator is higher than or equal to the first preset temperature. If the first working temperature of the evaporator is greater than or equal to the second preset temperature, the frequency of the compressor is controlled to be reduced while the external fan is controlled to be turned off, and the air conditioner is further protected.
When the air conditioner enters the protection state in the heating mode and the first working temperature of the evaporator becomes lower than the fourth preset temperature, the indoor unit control module 10 sends a first compressor control signal to the outdoor unit control port 30 through the indoor unit and outdoor unit communication module 40; wherein the fourth preset temperature is lower than the first preset temperature. The outdoor unit control module 20 is further configured to control the external fan to start up when the first compressor control signal is detected again by the internal and external unit communication module 40, that is, the external fan is controlled to exit the protection mode, and the air conditioner resumes normal operation.
When the first operating temperature of the evaporator becomes lower than the fifth preset temperature, the indoor unit control module 10 sends a second compressor control signal to the outdoor unit control port 30 through the indoor and outdoor unit communication module 40 to the outdoor unit control port 30; wherein the fifth preset temperature is lower than the fourth preset temperature. Under the condition that the frequency of the compressor is controlled to be reduced by the first preset value, the outdoor unit control module 20 is further configured to control the external fan to start up when the second compressor control signal is detected by the internal and external unit communication module 40, and also control the frequency of the compressor to be restored, namely, the frequency of the compressor is cancelled, the protection mode is exited, and the air conditioner is restored to normal operation.
The air conditioner control system provided by the invention can also protect the evaporator in a refrigeration mode and prevent the evaporator from freezing. Specifically, when the air conditioner is in the cooling mode, the indoor unit control module 10 is further configured to send a second compressor control signal to the outdoor unit control port 30 through the indoor and outdoor unit communication module 40 when the second operating temperature of the evaporator is less than or equal to a third preset temperature; the outdoor unit control module 20 is further configured to reduce the frequency of the compressor by a second preset value according to the second compressor control signal, and control the air conditioner to enter a protection mode.
When the air conditioner enters the protection state in the refrigeration mode and the second working temperature becomes higher than the sixth preset temperature, the outdoor unit control module 20 is further configured to send a second compressor control signal to the outdoor unit control port 30 through the indoor and outdoor unit communication module 40 to the outdoor unit control port 30; the outdoor unit control module 20 is further configured to control the external fan to start and control the frequency recovery of the compressor when the second compressor control signal is detected by the internal and external unit communication module 40, so that the air conditioner exits the protection mode and enters a normal operating state.
The outdoor unit control port 30 includes a compressor control pin and a four-way valve control pin; in the heating mode, the indoor unit control module 10 controls the four-way valve control pin to be continuously the first level signal, and in the cooling mode, the indoor unit control module 10 controls the four-way valve control pin to be continuously the second level signal. Therefore, the outdoor unit control module 20 needs to detect the signal of the four-way valve control pin when detecting the signal of the compressor control pin of the outdoor unit control port 30.
In this embodiment, the first level signal is a 24V ac electrical signal, and the second level signal is a 0V ac electrical signal. The first compressor control signal is a second level signal for controlling the compressor control pin to maintain a first preset time and then is recovered to be a first level signal, and the second compressor control signal is a second level signal for controlling the compressor control pin to maintain a second preset time and then is recovered to be a first level. In some embodiments, the first preset time may be 0.5 seconds, and the second preset time may be 1 second.
In some embodiments, referring to fig. 2, the indoor/outdoor unit communication module 40 includes an indoor unit communication unit 41 and an outdoor unit communication unit 42; the indoor unit communication unit 41 is respectively connected with the indoor unit control module 10 and the outdoor unit control port 30, and the outdoor unit communication unit 42 is respectively connected with the outdoor unit control port 30 and the outdoor unit control module 20; the indoor unit communication unit 41 is configured to output the first compressor control signal or the second compressor control signal to the outdoor unit control port 30; the outdoor unit communication unit 42 is configured to output the first compressor control signal or the second compressor control signal to the outdoor unit control module 20.
As an embodiment, please refer to fig. 3, the indoor unit communication unit 41 includes a first relay K1, a second relay K2, a first optocoupler OP1 and an output port P1, a first end of a coil of the first relay K1 is grounded, a second end of the coil of the first relay K1 is connected to the indoor unit control module 10, a first end of a switch of the first relay K1 is connected to a compressor control pin of the outdoor unit control port 30 through the output port P1, and a second end of the switch of the first relay K1 is connected to a 24Vac signal end; a first end of a coil of the second relay K2 is grounded, a second end of the coil of the second relay K2 is connected with the indoor unit control module 10, a first end of a switch of the second relay K2 is connected with a 24Vac signal end, and a second end of the switch of the second relay K2 is connected with a four-way valve control pin of the outdoor unit control port 30 through an output port P1; the 1 st pin of the first optical coupler OP1 is connected with the outdoor unit control port 30, the 2 nd pin of the first optical coupler OP1 is connected with the outdoor unit control port 30, the 3 rd pin of the first optical coupler OP1 is connected with the indoor unit control module 10, and the 4 th pin of the first optical coupler OP1 is electrically connected.
The periphery of the first optocoupler OP1 is further connected with a resistor, a capacitor and a diode device, the first optocoupler OP1, the resistor, the capacitor and the diode device form a receiving part of the indoor unit communication unit 41, and the level is detected in an optocoupler rectification conduction mode. The first relay K1 and the second relay K2 are the transmitting parts of the indoor unit communication unit 41, and the indoor unit control module 10 controls the on-off of the first relay K1 and the second relay K2 to control the on-off of 24V alternating current, so that the control of a compressor control pin and a four-way valve control pin is realized.
During specific implementation, the indoor unit control module 10 controls the level of the compressor control pin through the first relay K1, and controls the level of the four-way valve control pin through the second relay K2. In the heating mode, the indoor unit control module 10 controls the four-way valve control pin to be a first level signal continuously through the second relay K2; in the cooling mode, the indoor unit control module 10 controls the four-way valve control pin to continuously set the four-way valve control pin to the second level signal through the second relay K2.
As an example, please refer to fig. 4, the outdoor unit communication unit 42 includes a third relay K3, a second optical coupler OP2 and a third optical coupler OP3; a first end of a coil of the third relay K3 is connected with the outdoor unit control module 20, a second end of the coil of the third relay K3 is connected with electricity, a third end of a switch of the third relay K3 is connected with a 1 st pin of the second optical coupler OP2, and a fourth end of the switch of the third relay K3 is connected with an outdoor unit control port 30; the 1 st foot of second opto-coupler OP2 is connected with compressor control pin, the 2 nd foot of second opto-coupler OP2 and the 2 nd foot of third opto-coupler OP3 all are connected with off-premises station control port 30, the 3 rd foot of second opto-coupler OP2 is connected with indoor set control module 10, the 4 th foot of second opto-coupler OP2 and the 4 th foot of third opto-coupler OP3 all connect the electricity, the 1 st foot and the cross valve control pin of third opto-coupler OP3 are connected, the 3 rd foot and the indoor set control module 10 of third opto-coupler OP3 are connected.
The peripheries of the first optical coupler OP1 and the second optical coupler OP2 are connected with a resistor, a capacitor and a diode device. The first optical coupler OP1 and the second optical coupler OP2 are used as receiving parts of the outdoor unit communication unit 42, the pin level of the outdoor unit control port 30 is detected by adopting an optical coupler rectification conduction mode, and the third relay K3 is used as a transmitting part of the outdoor unit communication unit 42. In specific implementation, the outdoor unit control module 20 may detect the level of the compressor control pin through the second optical coupler OP2, and detect the level of the four-way valve control pin through the third optical coupler OP 3.
The following illustrates the operation of the air conditioner control system, and the protection process of the evaporator against high temperature in the heating mode is specifically as follows:
on the indoor machine side, please refer to fig. 5 and fig. 6 together, when IPT = TE7, wherein IPT is the operating temperature of the evaporator. When the air conditioner is in a heating mode, IPT is the first working temperature of the evaporator; when the air conditioner is in a cooling mode, the IPT is the second working temperature of the evaporator. The indoor unit control module 10 sends a first compressor control signal to the outdoor unit control port 30, namely, controls the compressor control pin "Y" to last for 0.5s and then to be restored to 24V, and at this time, the outdoor unit control module 20 responds to control the outdoor fan to be turned off; when IPT = TE8, the indoor unit control module 10 sends a second compressor control signal to the outdoor unit control port 30, i.e. controls the compressor control pin "Y" to continue for 1s to be 0V, and then returns to 24V, at which time the outdoor unit control module 20 responds to turn off the external fan and operates the compressor with the modified reduced frequency Δ F1. Thereby, the air conditioner is brought into a protection state.
In the protection process, when the IPT < TE6, the indoor unit control module 10 controls the compressor control pin "Y" to continue for 0.5s to be 0V, and then recovers to 24V, and at this time, the outdoor unit control module 20 responds to control the external fan to be turned on; when IPT < TE5, the indoor unit control module 10 sends a second compressor control signal to the outdoor unit control port 30, i.e. controls the compressor control pin "Y" to continue for 1s to be 0V, and then recovers to 24V, at this time, the outdoor unit control module 20 responds to turn on the outdoor fan and controls the compressor frequency correction to cancel. Thereby, the air conditioner is caused to exit the protection state; wherein TE8 is greater than TE7, TE7 is greater than TE6, and TE6 is greater than TE5.
On the outdoor unit side, if the outdoor unit control module 20 detects that the four-way valve control pin "O" is a 24Vac signal, the compressor control pin "Y" continues for 0.5s to be a 0Vac signal, and then recovers to be the 24Vac signal, the compressor and the four-way valve are controlled to be kept in an open state, and the external air blower is turned off; if the outdoor unit control module 20 detects that the four-way valve control pin "O" is a 24Vac signal and the compressor control pin "Y" continues to be a 0Vac signal for 1s, and then returns to the 24Vac signal, the compressor and the four-way valve are kept in an on state, but the external fan is turned off and the compressor is operated with a reduced frequency Δ F1. Thereby causing the air conditioner to enter a protection state.
In the protection process, if the outdoor unit control module 20 detects that the four-way valve control pin "O" is a 24Vac signal, the compressor control pin "Y" continues to be a 0Vac signal for 0.5s, and then recovers to be the 24Vac signal, the compressor and the four-way valve are controlled to be kept in an on state, and the external fan is started to operate; if the outdoor unit control module 20 detects that the four-way valve control pin "O" is a 24Vac signal and the compressor control pin "Y" continues for 1s to be a 0Vac signal, and then recovers to the 24Vac signal, the compressor and the four-way valve are controlled to be kept in an on state, the external fan is turned on and the frequency correction of the compressor is cancelled. Therefore, the air conditioner exits the protection state and operates normally.
The anti-freezing protection process of the evaporator in the refrigeration mode specifically comprises the following steps:
referring to fig. 7 and 8, when IPT = TE2, the indoor unit control module 10 sends a second compressor control signal to the outdoor unit control port 30, i.e. controls the compressor control pin "Y" to continue for 1s to 0V and then to return to 24V, and at this time, the compressor operates at a reduced frequency Δ F2, thereby controlling the air conditioner to enter a protection state.
In the protection process, when IPT > TE3, the indoor unit control module 10 sends a second compressor control signal to the outdoor unit control port 30, i.e. controls the compressor control pin "Y" to continue for 1s to be 0V, and then returns to 24V, at which time the compressor frequency correction is cancelled, thereby controlling the air conditioner to exit the protection state. Wherein TE3 is greater than TE2, and TE2 is greater than TE1.
On the outdoor unit side, if the outdoor unit control module 20 detects that the four-way valve control pin "O" is a 0Vac signal, the compressor control pin "Y" continues for 1s to be a 0Vac signal, and then returns to a 24Vac signal, the compressor and the four-way valve are controlled to be kept in the on and off states, respectively, but the compressor is controlled to operate with the frequency Δ F2 reduced.
If the outdoor unit control module 20 detects that the control end O of the four-way valve is a 0Vac signal and the control end Y of the compressor continues to be a 0Vac signal for 1s, and then returns to a 24Vac signal, the compressor and the four-way valve are respectively kept in the on and off states, but the frequency correction of the compressor is cancelled, and the protection state is exited.
Further, the present invention also provides an air conditioner, which includes the above air conditioner control system, and the above detailed description of the air conditioner control system is omitted here for brevity.
Further, the present invention also provides a method for controlling an air conditioner, wherein the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes an evaporator, the outdoor unit includes an outdoor unit control port, please refer to fig. 9, the method includes the following steps:
100. when the air conditioner is in a heating mode, detecting a first working temperature of an evaporator;
110. when the first working temperature is greater than or equal to a first preset temperature, sending a first compressor control signal to an outdoor unit control port to control an external fan of the outdoor unit to stop;
120. when the first working temperature is greater than or equal to a second preset temperature, sending a second compressor control signal to the outdoor unit control port to control the stop of the external fan and reduce the frequency of the compressor of the outdoor unit by a first preset value; wherein the second preset temperature is greater than the first preset temperature.
Further, referring to fig. 10, the air conditioner control method further includes:
200. detecting a second working temperature of the evaporator when the air conditioner is in a refrigeration mode;
210. and when the second working temperature is less than or equal to the third preset temperature, sending a second compressor control signal to the outdoor unit control port to control the frequency of the compressor to reduce the second preset value.
In summary, the present invention provides an air conditioner control system, method and air conditioner, wherein the air conditioner control system includes an indoor unit control module, an outdoor unit control port and an indoor and outdoor unit communication module, the indoor unit control module is connected to the indoor and outdoor unit control module, and the indoor and outdoor unit communication module is further connected to the outdoor unit control port and the outdoor unit control module; in the heating mode, the indoor unit control module is used for sending a first compressor control signal to the outdoor unit control port through the indoor and outdoor unit communication module when the first working temperature of the evaporator is greater than or equal to a first preset temperature; the outdoor unit control module is used for controlling the stop of the outer fan when detecting a first compressor control signal through the indoor unit and outdoor unit communication module; according to the invention, the control signal is sent to the outdoor unit in advance when the load of the indoor unit is abnormal, so that the stop of the outer fan is controlled, and the problem of repeated start and stop is avoided.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. An air conditioner control system is characterized by comprising an indoor unit control module, an outdoor unit control port and an indoor and outdoor unit communication module, wherein the indoor unit control module is connected with the indoor and outdoor unit communication module;
in the heating mode, the indoor unit control module is used for sending a first compressor control signal to the outdoor unit control port through the indoor and outdoor unit communication module when the first working temperature of the evaporator is greater than or equal to a first preset temperature;
the outdoor unit control module is used for controlling the outer fan to stop when the inner and outer unit communication module detects the first compressor control signal.
2. The air conditioner control system according to claim 1, wherein in the heating mode, the indoor unit control module is further configured to send a second compressor control signal to the outdoor unit control port through the outdoor unit communication module when the first operating temperature is greater than or equal to a second preset temperature; wherein the second preset temperature is greater than the first preset temperature;
the outdoor unit control module is also used for controlling the stop of the outer fan and reducing the frequency of the compressor by a first preset value when the inner and outer unit communication module detects the second compressor control signal.
3. The air conditioner control system of claim 1, wherein in the cooling mode, the indoor unit control module is further configured to send the second compressor control signal to the outdoor unit control port through the outdoor unit communication module when the second operating temperature of the evaporator is less than or equal to a third predetermined temperature; and the outdoor unit control module is also used for reducing the frequency of the compressor by a second preset value according to the second compressor control signal.
4. The air conditioner control system according to claim 1, wherein in the heating mode and in the external air conditioner off state, the indoor unit control module is further configured to send the first compressor control signal to the outdoor unit control port through the outdoor unit communication module when the first operating temperature is lower than a fourth preset temperature; wherein the fourth preset temperature is lower than the first preset temperature;
the outdoor unit control module is further used for controlling the external fan to start when the internal and external unit communication module detects the first compressor control signal again.
5. The air conditioner control system according to claim 2, wherein when the external fan is turned off in the heating mode, the indoor unit control module is further configured to send a second compressor control signal to the outdoor unit control port through the indoor and outdoor unit communication module when the first operating temperature is lower than a fifth preset temperature; wherein the fifth preset temperature is less than the fourth preset temperature;
and the outdoor unit control module is also used for controlling the starting of the outer fan and recovering the frequency of the compressor when the second compressor control signal is detected again by the indoor and outdoor unit communication module.
6. The air conditioner control system according to claim 3, wherein in a cooling mode, the indoor unit control module is further configured to send a second compressor control signal to the outdoor unit control port via the indoor and outdoor unit communication module to the outdoor unit control port when the second operating temperature is higher than the sixth preset temperature; the outdoor unit control module is also used for controlling the starting of the external fan and controlling the frequency recovery of the compressor when the internal and external unit communication module detects the second compressor control signal; wherein the sixth preset temperature is greater than the third preset temperature.
7. An air conditioner control system according to any one of claims 2-6, wherein said indoor and outdoor unit communication modules comprise indoor unit communication units and outdoor unit communication units; the indoor unit communication unit is respectively connected with the indoor unit control module and the outdoor unit control port, and the outdoor unit communication unit is respectively connected with the outdoor unit control port and the outdoor unit control module;
the indoor unit communication unit is used for outputting the first compressor control signal or the second compressor control signal to the outdoor unit control port;
the outdoor unit communication unit is used for outputting the first compressor control signal or the second compressor control signal to the outdoor unit control module.
8. A control method of an air conditioner is characterized in that the air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises an evaporator, the outdoor unit comprises an outdoor unit control port, and the control method of the air conditioner comprises the following steps:
detecting a first working temperature of the evaporator when the air conditioner is in a heating mode;
when the first working temperature is higher than or equal to a first preset temperature, sending a first compressor control signal to a control port of the outdoor unit so as to control an external fan of the outdoor unit to stop;
when the first working temperature is greater than or equal to a second preset temperature, sending a second compressor control signal to the outdoor unit control port to control the external fan to stop and reduce the frequency of a compressor of the outdoor unit by a first preset value; wherein the second preset temperature is greater than the first preset temperature.
9. The air conditioner control method according to claim 8, further comprising:
when the air conditioner is in a refrigeration mode, detecting a second working temperature of the evaporator;
and when the second working temperature is less than or equal to a third preset temperature, sending a second compressor control signal to the outdoor unit control port to control the frequency of the compressor to reduce a second preset value.
10. An air conditioner characterized by comprising the air conditioner control system according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211494497.8A CN115899959A (en) | 2022-11-25 | 2022-11-25 | Air conditioner control system and method and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211494497.8A CN115899959A (en) | 2022-11-25 | 2022-11-25 | Air conditioner control system and method and air conditioner |
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| CN115899959A true CN115899959A (en) | 2023-04-04 |
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| CN202211494497.8A Pending CN115899959A (en) | 2022-11-25 | 2022-11-25 | Air conditioner control system and method and air conditioner |
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| Country | Link |
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| CN (1) | CN115899959A (en) |
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