CN115900021A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN115900021A CN115900021A CN202211499893.XA CN202211499893A CN115900021A CN 115900021 A CN115900021 A CN 115900021A CN 202211499893 A CN202211499893 A CN 202211499893A CN 115900021 A CN115900021 A CN 115900021A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses an air conditioner and a control method thereof.A indoor machine of the air conditioner is provided with at least two indoor heat exchangers, each indoor heat exchanger is provided with a corresponding expansion valve, the opening of the expansion valve is adjusted by responding to a cellar mode starting operation instruction, the flow of a refrigerant flowing through each indoor heat exchanger is controlled, and then the temperature of an indoor coil pipe of each indoor heat exchanger is controlled, so that the temperature of each indoor coil pipe is greater than the current indoor dew point temperature, and a compressor is controlled to operate and the indoor heat exchanger is used as an evaporator to play a role, so that the air conditioner operates in the cellar mode. Therefore, the embodiment of the invention can reduce the reduction rate of the indoor environment humidity by adopting the plurality of evaporators to refrigerate simultaneously and controlling the temperature of the indoor coil to be higher than the dew point temperature, so that frequent water replenishing for the indoor environment is not needed, the consumption of water resources is reduced, and the risk of overlow indoor humidity is reduced.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
With the improvement of living standards and the continuous development of air conditioning technology, air conditioners are widely used indoors for adjusting indoor temperature.
In the application scene of the air conditioner, the environment requirements of constant temperature and constant humidity are often met, such as wine cellar, flower room and the like, in the scene, the environment temperature and the environment humidity are strictly limited, such as the indoor environment temperature is required to be about 10 ℃, the environment humidity is required to be about 70%, and the environment with constant temperature and constant humidity is beneficial to the fresh keeping of substances such as wine, flowers and the like.
In an application scenario with constant temperature and humidity requirements, the air conditioner needs to refrigerate when the outdoor environment temperature is high so as to maintain the indoor environment temperature near an appropriate temperature, but the indoor humidity gradually decreases with the lapse of refrigeration time, and the requirement of constant humidity of the indoor environment cannot be met. In this regard, in the prior art, a humidifier is usually additionally added in the room to replenish the indoor moisture when the air conditioner is cooling, more water resources are additionally consumed, and the risk that the indoor humidity is too low due to the exhaustion of the humidifier moisture is high.
Disclosure of Invention
The embodiment of the invention aims to provide an air conditioner and a control method thereof, which can slow down the reduction rate of the indoor environment humidity by adopting a plurality of evaporators to refrigerate simultaneously and controlling the temperature of an indoor coil to be higher than the dew point temperature, further avoid frequently supplementing water to the indoor environment, reduce the consumption of water resources and reduce the risk of over-low indoor humidity.
To achieve the above object, an embodiment of the present invention provides an air conditioner, including:
a refrigerant circuit that circulates a refrigerant in sequence through a compressor, a condenser, an expansion valve, and an evaporator; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger;
the indoor unit is used for exchanging heat with indoor air, at least two indoor heat exchangers are arranged in the indoor unit, and the indoor unit further comprises a temperature sensor corresponding to each indoor heat exchanger;
the outdoor unit is used for carrying out heat exchange with outdoor air, and the compressor and the outdoor heat exchanger are arranged in the outdoor unit;
a controller to:
responding to a cellar mode starting operation instruction, controlling the opening degree of an expansion valve corresponding to each indoor heat exchanger to be a preset cellar refrigeration opening degree so that the temperature of an indoor coil pipe monitored by each temperature sensor is larger than a preset dew point temperature, and controlling the compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
As an improvement of the above scheme, the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger; the expansion valve comprises a first expansion valve and a second expansion valve which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the temperature sensors comprise a first temperature sensor and a second temperature sensor which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the indoor unit further comprises a first indoor fan and a second indoor fan which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger;
the controller is specifically configured to:
responding to a cellar refrigeration starting operation instruction, controlling the opening degree of the first expansion valve to be a preset first opening degree so that the temperature of a first indoor coil of a first indoor heat exchanger monitored by the first temperature sensor is larger than a preset dew point temperature, and controlling the opening degree of the second expansion valve to be a preset second opening degree so that the temperature of a second indoor coil of a second indoor heat exchanger monitored by the second temperature sensor is larger than the temperature of the first indoor coil; wherein the first opening degree is smaller than the second opening degree;
controlling the rotating speed of the first indoor fan to be a first rotating speed, and controlling the rotating speed of the second indoor fan to be a second rotating speed; wherein the first rotational speed is greater than the second rotational speed;
controlling the compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
As an improvement of the above scheme, the air conditioner further comprises a four-way valve; the air exhaust port of the compressor is connected with the first end of the four-way valve, the second end of the four-way valve is connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is respectively connected with the first end of each expansion valve, the second end of each expansion valve is respectively connected with the first end of the corresponding indoor heat exchanger, the second end of each indoor heat exchanger is respectively connected with the third end of the four-way valve, and the fourth end of the four-way valve is connected with the air suction port of the compressor.
As an improvement of the above scheme, the four-way valve includes a first four-way valve and a second four-way valve, the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger, and the expansion valve includes a first expansion valve and a second expansion valve;
the air outlet of the compressor is respectively connected with the first end of the first four-way valve and the first end of the second four-way valve, the second end of the first four-way valve and the second end of the second four-way valve are respectively connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is respectively connected with the first end of the first expansion valve and the first end of the second expansion valve, the second end of the first expansion valve is connected with the first end of the first indoor heat exchanger, the second end of the second expansion valve is connected with the first end of the second indoor heat exchanger, the second end of the first indoor heat exchanger is connected with the third end of the first four-way valve, the second end of the second indoor heat exchanger is connected with the third end of the second four-way valve, and the fourth end of the first four-way valve and the fourth end of the second four-way valve are respectively connected with the air suction port of the compressor.
As an improvement of the above scheme, the air conditioner further comprises a gas-liquid separator and an electric heating belt;
the fourth end of the first four-way valve and the fourth end of the second four-way valve are respectively connected with a suction port of the compressor through the gas-liquid separator; the electric heating belt is arranged on the gas-liquid separator.
As an improvement of the above, the controller is further configured to:
and responding to a refrigerating mode starting instruction, controlling the air conditioner to enter a refrigerating mode, and enabling the indoor heat exchanger to function as an evaporator to reduce the indoor temperature.
As an improvement of the above, the controller is further configured to:
and responding to a heating mode starting instruction, controlling the air conditioner to enter a heating mode, and enabling the indoor heat exchanger to function as a condenser to increase the indoor temperature.
As an improvement of the above, the controller is further configured to:
and responding to a dehumidification mode starting instruction, controlling the compressor to operate, and controlling the temperature of an indoor coil of at least one indoor heat exchanger to be lower than the dew point temperature so as to enable the air conditioner to enter a dehumidification mode and enable the indoor heat exchanger to function as an evaporator to reduce the indoor humidity.
In order to achieve the above object, an embodiment of the present invention further provides an air conditioner control method, where the air conditioner includes:
a refrigerant circuit that circulates a refrigerant in sequence through a compressor, a condenser, an expansion valve, and an evaporator; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger;
the indoor unit is used for carrying out heat exchange with indoor air, at least two indoor heat exchangers are arranged in the indoor unit, and the indoor unit further comprises a temperature sensor corresponding to each indoor heat exchanger;
the outdoor unit is used for carrying out heat exchange with outdoor air, and the compressor and the outdoor heat exchanger are arranged in the outdoor unit;
the method comprises the following steps:
responding to a cellar mode starting operation instruction, controlling the opening degree of an expansion valve corresponding to each indoor heat exchanger to be a preset cellar refrigeration opening degree so that the temperature of an indoor coil pipe monitored by each temperature sensor is larger than a preset dew point temperature, and controlling the compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
As an improvement of the above scheme, the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger; the expansion valve comprises a first expansion valve and a second expansion valve which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the temperature sensors comprise a first temperature sensor and a second temperature sensor which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the indoor unit also comprises a first indoor fan and a second indoor fan which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger;
the method specifically comprises the following steps:
responding to a cellar refrigeration starting operation instruction, controlling the opening degree of the first expansion valve to be a preset first opening degree so that the temperature of a first indoor coil of a first indoor heat exchanger monitored by the first temperature sensor is larger than a preset dew point temperature, and controlling the opening degree of the second expansion valve to be a preset second opening degree so that the temperature of a second indoor coil of a second indoor heat exchanger monitored by the second temperature sensor is larger than the temperature of the first indoor coil; wherein the first opening degree is smaller than the second opening degree;
controlling the rotating speed of the first indoor fan to be a first rotating speed, and controlling the rotating speed of the second indoor fan to be a second rotating speed; wherein the first rotational speed is greater than the second rotational speed;
controlling a compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
Compared with the prior art, the air conditioner and the control method thereof disclosed by the embodiment of the invention have the advantages that the indoor unit of the air conditioner is provided with at least two indoor heat exchangers, each indoor heat exchanger is provided with the corresponding expansion valve, the opening of the expansion valve is adjusted by responding to the operating instruction of the cellar mode, the flow of the refrigerant flowing through each indoor heat exchanger is controlled, the temperature of the indoor coil pipes of the indoor heat exchangers is further controlled, the temperature of each indoor coil pipe is enabled to be larger than the current indoor dew point temperature, the operation of the compressor is controlled, and the indoor heat exchangers are used as evaporators to play a role, so that the air conditioner can operate in the cellar mode. Therefore, the embodiment of the invention can reduce the reduction rate of the indoor environment humidity by adopting the plurality of evaporators to refrigerate simultaneously and controlling the temperature of the indoor coil to be higher than the dew point temperature, so that frequent water replenishing is not needed to be carried out indoors, the consumption of water resources is reduced, and the risk of over-low indoor humidity is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a simplified refrigeration system according to an embodiment of the present invention;
FIG. 3 is a first flowchart of a controller provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a double heat exchanger of an indoor unit according to an embodiment of the present invention;
FIG. 5 is a second flowchart of the operation of the controller provided by the embodiment of the present invention;
FIG. 6 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 8 is a schematic flow diagram of the refrigerant in the cellar mode provided by an embodiment of the invention;
FIG. 9 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 10 is a third flowchart of the operation of the controller provided by the embodiment of the present invention;
FIG. 11 is a schematic flow diagram of refrigerant in a heating mode provided by an embodiment of the present invention;
100, an indoor unit; 200. an outdoor unit; 1. a compressor; 10. a condenser; 2. an expansion valve; 21. a first expansion valve; 22. a second expansion valve; 30. an evaporator; 31. a first indoor heat exchanger; 32. a second indoor heat exchanger; 33. a first indoor fan; 34. a second indoor fan; 35. a first temperature sensor; 36. a second temperature sensor; 4. a four-way valve; 41. a first four-way valve; 42. a second four-way valve; 5. an outdoor heat exchanger; 6. a gas-liquid separator; 7. the tape is electrically heated.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are intended merely to facilitate the description and the simplified illustration, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it should be noted that the terms "mounted", "connected", and "connected", unless otherwise specifically stated or limited, are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
Referring to fig. 1, an air conditioner according to an embodiment of the present invention includes an indoor unit 100 and an outdoor unit 200, wherein the indoor unit 100 is used for adjusting the temperature and humidity of indoor air, the outdoor unit 200 is connected to the indoor unit 100 through a connecting pipe, the outdoor unit 200 is installed outdoors, and the indoor unit 100 is installed indoors.
The air conditioner is provided with a refrigerant loop, and particularly, the refrigerant loop circulates a refrigerant through a compressor, a condenser, an expansion valve and an evaporator in sequence; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger.
The heat exchange principle in the refrigerant loop is as follows:
referring to fig. 2 showing a schematic configuration of a simple refrigeration system including a compressor 1, a condenser 10, an expansion valve 2, and an evaporator 20, a refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to air that has been conditioned and heat-exchanged, the compressor 1 compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas, the discharged refrigerant gas flows into the condenser 10, the condenser 10 condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The expansion valve 2 expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser 10 into a low-pressure liquid-phase refrigerant. The evaporator 20 evaporates the refrigerant expanded in the expansion valve, and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 1a the evaporator 20 can achieve a cooling effect by heat exchange with a material to be cooled using latent heat of evaporation of the refrigerant.
The air conditioner can adjust the temperature of the indoor space throughout the cycle. The outdoor unit 200 of the air conditioner refers to a portion of a refrigeration cycle including the compressor 1 and an outdoor heat exchanger, the indoor unit 100 of the air conditioner includes an indoor heat exchanger, and the expansion valve may be provided in the indoor unit 100 or the outdoor unit 200. The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioner is a heater for heating when the indoor heat exchanger is used as a condenser, and a cooler for cooling when the indoor heat exchanger is used as an evaporator.
It should be noted that the air conditioner is not limited to the above specific form, that is, the outdoor unit is not necessarily installed outdoors, and the indoor unit 100 and the outdoor unit 200 may be integrated to form an integrated air conditioner, which is convenient for transportation, does not need special installation, and saves the installation space of the outdoor unit 200.
The air conditioner further comprises a controller, and specifically, in the embodiment of the invention, the controller is configured to respond to a cellar mode starting operation instruction, control an opening degree of an expansion valve corresponding to each indoor heat exchanger to be a preset cellar cooling opening degree so that the temperature of an indoor coil monitored by each temperature sensor is greater than a preset dew point temperature, and control the compressor 1 to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
Exemplarily, referring to fig. 3, fig. 3 is a first work flow chart of the controller provided by the embodiment of the present invention; the controller is configured to perform steps S11 to S12:
s11, responding to a cellar mode starting operation instruction, and controlling the compressor 1 to operate.
Specifically, an outdoor ambient temperature sensor is provided outdoors for detecting an outdoor ambient temperature, and the operating frequency of the compressor 1 is determined according to the outdoor ambient temperature. The cellar mode starting operation instruction can be input by a user through a remote controller in a mode of pulse modulation signals, and can also be input through a line controller, and the instructions are not limited in the process.
S12, controlling the opening degree of an expansion valve corresponding to each indoor heat exchanger to be a preset cellar refrigeration opening degree so that the temperature of an indoor coil detected by each temperature sensor arranged on each indoor heat exchanger is higher than a preset dew point temperature, and enabling the air conditioner to enter a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
Specifically, the dew point temperature is the indoor dew point temperature, which is the temperature at which the air is cooled to saturation under the condition that the air pressure is maintained constant with the water vapor content in the air, and is referred to as the dew point, and the unit is expressed by ° c or ° F, which is the temperature at which the water vapor and the water reach an equilibrium state. The expansion valve may be an electronic expansion valve,
in this embodiment, indoor heat exchanger under the cellar for storing things mode plays the function as the evaporimeter, refrigerate in order to maintain indoor temperature at lower temperature, if 10 degrees centigrade, compare in only adopting an indoor heat exchanger to carry out refrigerated mode, this embodiment adopts the mode of a plurality of indoor heat exchanger operations, can be under same indoor ambient temperature requirement, suitably improve every indoor heat exchanger's coil pipe temperature, also can reach the same refrigeration effect, simultaneously because indoor heat exchanger's coil pipe temperature has improved, the probability that indoor moisture condenses has just reduced, slow down the rate of reduction of indoor ambient humidity, and then need not to carry out frequent moisturizing to indoor, the consumption of water resource has been reduced, the too low risk of indoor humidity has been reduced.
In a preferred embodiment, the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger; the expansion valve comprises a first expansion valve and a second expansion valve which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the temperature sensors comprise a first temperature sensor and a second temperature sensor which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the indoor unit 100 further includes a first indoor fan and a second indoor fan, which correspond to the first indoor heat exchanger and the second indoor heat exchanger, respectively;
the controller is specifically configured to:
responding to a cellar refrigeration starting operation instruction, controlling the opening degree of the first expansion valve to be a preset first opening degree so that the temperature of a first indoor coil of a first indoor heat exchanger monitored by the first temperature sensor is larger than a preset dew point temperature, and controlling the opening degree of the second expansion valve to be a preset second opening degree so that the temperature of a second indoor coil of a second indoor heat exchanger monitored by the second temperature sensor is larger than the temperature of the first indoor coil; wherein the first opening degree is smaller than the second opening degree;
controlling the rotating speed of the first indoor fan to be a first rotating speed, and controlling the rotating speed of the second indoor fan to be a second rotating speed; wherein the first rotational speed is greater than the second rotational speed;
controlling the compressor 1 to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
For example, the indoor heat exchanger may be a double heat exchanger, referring to a schematic structural diagram of the indoor unit double heat exchanger shown in fig. 4, the indoor heat exchanger includes a first indoor heat exchanger 31 and a second indoor heat exchanger 32, the first indoor heat exchanger 31 is equipped with a corresponding first indoor fan 33, the second indoor heat exchanger 32 is equipped with a corresponding second indoor fan 34, airflow is formed by the first indoor fan 33 and the second indoor fan 34 to blow to the first indoor heat exchanger 31 and the second indoor heat exchanger 32, respectively, and in the cellar mode, refrigerant flowing through the first indoor heat exchanger 31 and the second indoor heat exchanger 32 absorbs heat, so that the temperature of the airflow is reduced and the airflow is sent out to the room by the fans, and the indoor temperature is reduced. The temperature sensors include a first temperature sensor and a second temperature sensor, which correspond to the first indoor heat exchanger 31 and the second indoor heat exchanger 32, respectively.
Exemplarily, referring to fig. 5, fig. 5 is a second work flow chart of the controller provided by the embodiment of the present invention; the controller is configured to perform steps S13-S15:
and S13, responding to a wine cellar refrigeration starting operation instruction, and controlling the compressor 1 to operate.
Specifically, an outdoor ambient temperature sensor is provided outdoors for detecting an outdoor ambient temperature, and the operating frequency of the compressor 1 is determined according to the outdoor ambient temperature. The cellar mode starting operation instruction can be input by a user through a remote controller in a mode of pulse modulation signals, and can also be input through a line controller, and the instructions are not limited in the process.
S14, controlling the opening degree of the first expansion valve to be a preset first opening degree so that the temperature of a first indoor coil of the first indoor heat exchanger 31 monitored by the first temperature sensor is greater than a preset dew point temperature, and controlling the opening degree of the second expansion valve to be a preset second opening degree so that the temperature of a second indoor coil of the second indoor heat exchanger 32 monitored by the second temperature sensor is greater than the temperature of the first indoor coil; wherein the first opening degree is smaller than the second opening degree;
s15, controlling the rotation speed of the first indoor fan 33 to be a first rotation speed, and controlling the rotation speed of the second indoor fan 34 to be a second rotation speed; wherein the first rotation speed is greater than the second rotation speed so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
For example, when the user uses the cellar mode (DEEP COOL function), the first indoor fan 33 uses a higher rotation speed (relative to the second indoor fan 34), and the first expansion valve maintains a smaller opening degree (relative to the second expansion valve) to appropriately reduce the amount of the refrigerant passing through the first indoor heat exchanger 31, thereby sufficiently evaporating the refrigerant and maintaining the first indoor heat exchanger 31 at about 5 to 6 ℃. Under normal pressure, the dew point temperature of water vapor with the temperature of 10 ℃ and the humidity of 70% is 4.5-5 ℃, the evaporation temperature of the first indoor heat exchanger 31 is kept slightly higher than the dew point temperature, meanwhile, the opening degree of the second expansion valve is larger (relative to the first expansion valve), the rotating speed of the second indoor fan 34 is kept lower (relative to the first indoor fan 33), the air outlet temperature is reduced, and the second indoor heat exchanger 32 is kept at about 7-8 ℃. The temperature of the indoor heat exchanger is higher than the dew point temperature, so that the dehumidification capacity is reduced while the refrigeration effect is ensured.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a refrigeration system according to an embodiment of the present invention, where the air conditioner further includes a four-way valve 4; an air outlet of the compressor 1 is connected with a first end of the four-way valve 4, a second end of the four-way valve 4 is connected with a first end of the outdoor heat exchanger, a second end of the outdoor heat exchanger is respectively connected with a first end of each expansion valve, a second end of each expansion valve is respectively connected with a first end of the corresponding indoor heat exchanger, a second end of each indoor heat exchanger is respectively connected with a third end of the four-way valve 4, and a fourth end of the four-way valve 4 is connected with an air suction port of the compressor 1. The flow direction of the refrigerant is controlled by controlling the state of the four-way valve 4, so that the running mode of the air conditioner is controlled, under the cellar mode, the first end and the second end of the four-way valve 4 are communicated, and the third end and the fourth end of the four-way valve 4 are communicated.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a refrigeration system according to an embodiment of the present invention, in which the four-way valve 4 includes a first four-way valve 41 and a second four-way valve 42, the indoor heat exchangers include a first indoor heat exchanger 31 and a second indoor heat exchanger 32, and the expansion valves include a first expansion valve 21 and a second expansion valve 22; the temperature sensors include a first temperature sensor 35 and a second temperature sensor 36, which correspond to the first indoor heat exchanger 31 and the second indoor heat exchanger 32, respectively.
An air outlet of the compressor 1 is connected to a first end of the first four-way valve 41 and a first end of the second four-way valve 42, a second end of the first four-way valve 41 and a second end of the second four-way valve 42 are connected to a first end of the outdoor heat exchanger 5, a second end of the outdoor heat exchanger is connected to a first end of the first expansion valve 21 and a first end of the second expansion valve 22, a second end of the first expansion valve 21 is connected to a first end of the first indoor heat exchanger 31, a second end of the second expansion valve 22 is connected to a first end of the second indoor heat exchanger 32, a second end of the first indoor heat exchanger 31 is connected to a third end of the first four-way valve 41, a second end of the second indoor heat exchanger 32 is connected to a third end of the second four-way valve 42, and a fourth end of the first four-way valve 41 and the second four-way valve 42 are connected to an air inlet of the compressor 1. The flow direction of the refrigerant is controlled by controlling the state of the four-way valve 4, and the operation mode of the air conditioner is controlled.
Referring to fig. 8, fig. 8 is a schematic flow direction diagram of a refrigerant in a cellar mode in which a first end and a second end of a first four-way valve 41 are communicated, a third end and a fourth end of the first four-way valve 41 are communicated, a first end and a second end of a second four-way valve 42 are communicated, a third end and a fourth end of the second four-way valve 42 are communicated, a compressor 1 compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas through an exhaust port, the discharged refrigerant gas flows to the first end of the first four-way valve 41 and the first end of the second four-way valve 42 respectively, the discharged refrigerant gas flows from the second end of the first four-way valve 41 and the second end of the second four-way valve 42 to the first end of an outdoor heat exchanger serving as a condenser, the compressed refrigerant is condensed into a liquid phase, heat is released to the surrounding environment (outdoors) through a condensation process, the refrigerant discharged from the second end of the outdoor heat exchanger is divided into two paths, the refrigerant flows into the first end of the first expansion valve 21 and the first end of the second expansion valve 22 respectively, the first expansion valve 21 and the second expansion valve 22 release the refrigerant to a low-pressure state, the refrigerant gas is evaporated by the first expansion valve 21 and the refrigerant gas, the refrigerant gas is returned to the indoor heat exchanger, and the indoor heat exchanger 1, and the refrigerant is evaporated to the indoor heat exchanger, and the refrigerant is cooled by the refrigerant is returned to the indoor heat exchanger, and the refrigerant is in a refrigerant is evaporated state.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a refrigeration system according to an embodiment of the present invention, where the air conditioner further includes a gas-liquid separator 6 and an electric heating belt 7; the fourth end of the first four-way valve 41 and the fourth end of the second four-way valve 42 are respectively connected with the suction port of the compressor 1 through the gas-liquid separator 6; the electric heating belt 7 is disposed on the gas-liquid separator 6.
Specifically, the gas-liquid separator 6 is applied to an air conditioner and is used for storing a refrigerant, filtering and absorbing water vapor from the refrigerant, the refrigerant firstly enters the gas-liquid separator 6 to flow into the bottom before returning to an air suction port of the compressor 1, the steam rises to the top and returns to the compressor 1, the refrigerated liquid is gradually gasified at the bottom of the gas-liquid separator 6 and then returns to the compressor 1, the electric heating belt 7 is arranged on the gas-liquid separator 6, the temperature of a suction refrigerant of the compressor 1 is increased, and the speed of evaporating the liquid refrigerant into gas is accelerated.
Specifically, in a preferred embodiment, the controller is further configured to control the air conditioner to enter a cooling mode in response to a cooling mode activation command, so that the indoor heat exchanger functions as an evaporator to reduce the indoor temperature.
Specifically, in a preferred embodiment, the controller is further configured to control the air conditioner to enter a heating mode in response to a heating mode activation instruction, so that the indoor heat exchanger functions as a condenser to increase the indoor temperature.
Specifically, in a preferred embodiment, the controller is further configured to control the compressor 1 to operate in response to a dehumidification mode start instruction, and control an indoor coil temperature of at least one indoor heat exchanger to be less than the dew point temperature, so as to enable the air conditioner to enter a dehumidification mode, and enable the indoor heat exchanger to function as an evaporator to reduce indoor humidity.
Illustratively, referring to fig. 10, fig. 10 is a third flowchart of the operation of the controller provided by the embodiment of the present invention; the controller is configured to perform steps S16 to S22:
s16, obtaining an instruction, and then, entering the step S17.
And S17, judging whether the command is a refrigerating mode starting command or not, if so, going to a step S18, and if not, going to a step S19.
And S18, responding to a refrigeration mode starting instruction, controlling the air conditioner to enter a refrigeration mode, and enabling the indoor heat exchanger to function as an evaporator to reduce the indoor temperature.
And S19, judging whether the command is a heating mode starting command, if so, going to a step S20, otherwise, going to a step S21.
And S20, responding to a heating mode starting instruction, controlling the air conditioner to enter a heating mode, and enabling the indoor heat exchanger to function as a condenser to improve the indoor temperature.
And S21, judging whether the command is a dehumidification mode starting command, if so, entering the step S22, and if not, entering other control logics.
S22, controlling the compressor 1 to operate, and controlling the temperature of an indoor coil of at least one indoor heat exchanger to be lower than the dew point temperature so as to enable the air conditioner to enter a dehumidification mode, and enabling the indoor heat exchanger to function as an evaporator to reduce indoor humidity.
For example, the flow direction of the refrigerant in the cooling mode is consistent with that of the cellar mode, the indoor fan is operated according to the user-set damper, the compressor 1 is operated at a proper frequency (determined according to the outdoor ambient temperature), and the first expansion valve 21 and the second expansion valve 22 are maintained at a certain opening degree, and the control of the particular cooling mode can be referred to in the prior art.
Exemplarily, referring to fig. 11, fig. 11 is a schematic flow direction diagram of a refrigerant in a heating mode according to an embodiment of the present invention, in which a first end and a third end of a first four-way valve 41 are communicated, a second end and a fourth end of the first four-way valve 41 are communicated, a first end and a third end of a second four-way valve 42 are communicated, a second end and a fourth end of the second four-way valve 42 are communicated, a refrigerant gas in a high-temperature and high-pressure state is compressed by the compressor 1 and the compressed refrigerant gas is discharged from a discharge port, the discharged refrigerant gas respectively flows to the first end of the first four-way valve 41, the first end of the second four-way valve 42, and then flows from the third end of the first four-way valve 41 and the third end of the second four-way valve 42 to the second end of the first indoor heat exchanger 31, the first indoor heat exchanger 31 and the second indoor heat exchanger 32 serve as condensers, the compressed refrigerant is condensed into a liquid phase, and heat is released to the surrounding environment (indoor) through the condensation process, the refrigerant discharged from the first end of the first indoor heat exchanger 31 and the first end of the second indoor heat exchanger 32 is divided into two paths and flows into the second end of the first expansion valve 21 and the second end of the second expansion valve 22, respectively, the first expansion valve 21 and the second expansion valve 22 expand the refrigerant into a low-pressure liquid phase for refrigeration, the refrigerant flows to the outdoor heat exchanger from the first end of the first expansion valve 21 and the first end of the second expansion valve 22, the outdoor heat exchanger serves as an evaporator to evaporate the refrigerant expanded in the expansion valves, and the refrigerant gas in a low-temperature and low-pressure state is returned to the compressor 1 through the second end and the fourth end of the first four-way valve 41, the second end and the fourth end of the second four-way valve 42, respectively.
In the heating operation mode, an indoor fan operates according to a user set windshield, the compressor 1 operates at a proper frequency (determined according to outdoor ambient temperature), the first expansion valve 21 and the second expansion valve 22 keep a certain opening degree, at the moment, an air suction temperature sensor arranged at an air suction port of the compressor 1 detects the temperature of air suction refrigerants, when the air suction temperature is lower than 0 ℃, an electric heating belt 7 on the gas-liquid separator 6 is opened to heat the refrigerants in the gas-liquid separator 6, so that part of liquid refrigerants are evaporated into gas and enter the compressor 1, the air suction temperature is increased, the liquid return risk is reduced, and the operation stability of the compressor 1 is improved.
Illustratively, the flow direction of the refrigerant in the dehumidification mode is consistent with that of the refrigerant in the cellar mode, the dew point temperature is calculated according to the detected indoor ambient temperature and humidity, the first expansion valve 21 is adjusted to a smaller opening degree (relative to the second expansion valve 22), the first indoor fan 33 keeps a lower wind speed (relative to the second indoor fan 34) to make the temperature of the first indoor heat exchanger 31 lower than the dew point temperature, and the water vapor in the condensation chamber is dehumidified; according to the gear and the temperature of the gear set by the user, the rotating speed of the second indoor fan 34 is adjusted, the second expansion valve 22 is adjusted to a proper opening degree, and the outlet air temperature is controlled by controlling the temperature of the second indoor heat exchanger 32.
Compared with the prior art, the embodiment of the invention discloses an air conditioner, wherein an indoor unit 100 of the air conditioner is provided with at least two indoor heat exchangers, each indoor heat exchanger is provided with a corresponding expansion valve, the opening degree of each expansion valve is adjusted by responding to a cellar mode starting operation instruction, the flow of a refrigerant flowing through each indoor heat exchanger is controlled, the temperature of indoor coil pipes of the indoor heat exchangers is further controlled, the temperature of each indoor coil pipe is enabled to be larger than the current indoor dew point temperature, and a compressor 1 is controlled to operate and the indoor heat exchangers are controlled to function as evaporators, so that the air conditioner operates in a cellar mode. Therefore, the embodiment of the invention can control the evaporation temperature by adopting the plurality of evaporators to simultaneously refrigerate and controlling the temperature of the indoor coil to be higher than the dew point temperature and controlling different evaporation pressures, can reduce condensation and dehumidification and slow down the reduction rate of the indoor environment humidity while achieving the refrigeration effect, further does not need to frequently replenish water indoors, reduces the consumption of water resources and reduces the risk of over-low indoor humidity.
The embodiment of the invention provides an air conditioner control method, which is applied to an air conditioner, and is implemented by a controller in the air conditioner, wherein the air conditioner comprises the following steps:
a refrigerant circuit that circulates a refrigerant in sequence through a compressor, a condenser, an expansion valve, and an evaporator; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger;
the indoor unit is used for carrying out heat exchange with indoor air, at least two indoor heat exchangers are arranged in the indoor unit, and the indoor unit further comprises a temperature sensor corresponding to each indoor heat exchanger;
the outdoor unit is used for carrying out heat exchange with outdoor air, and the compressor and the outdoor heat exchanger are arranged in the outdoor unit;
the method comprises the following steps:
responding to a cellar mode starting operation instruction, controlling the opening degree of an expansion valve corresponding to each indoor heat exchanger to be a preset cellar refrigeration opening degree so that the temperature of an indoor coil pipe monitored by each temperature sensor is larger than a preset dew point temperature, and controlling the compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
In this embodiment, indoor heat exchanger under the cellar for storing things mode plays a function as the evaporimeter, refrigerate in order to maintain indoor temperature at lower temperature, like 10 degrees centigrade, compare in only adopting an indoor heat exchanger to carry out refrigerated mode, this embodiment adopts the mode of a plurality of indoor heat exchanger operations, can be under same indoor ambient temperature requirement, suitably improve every indoor heat exchanger's coil pipe temperature, also can reach the same refrigeration effect, simultaneously because indoor heat exchanger's coil pipe temperature has improved, the probability that indoor moisture condenses has just been reduced, slow down indoor ambient humidity's rate of reduction, and then need not to carry out frequent moisturizing indoor, the consumption of water resource has been reduced, the risk that indoor humidity is low has been reduced.
In a preferred embodiment, the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger; the expansion valve comprises a first expansion valve and a second expansion valve which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the temperature sensors comprise a first temperature sensor and a second temperature sensor which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the indoor unit also comprises a first indoor fan and a second indoor fan which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger;
the method specifically comprises the following steps:
responding to a cellar refrigeration starting operation instruction, controlling the opening degree of the first expansion valve to be a preset first opening degree so that the temperature of a first indoor coil of a first indoor heat exchanger monitored by the first temperature sensor is larger than a preset dew point temperature, and controlling the opening degree of the second expansion valve to be a preset second opening degree so that the temperature of a second indoor coil of a second indoor heat exchanger monitored by the second temperature sensor is larger than the temperature of the first indoor coil; wherein the first opening degree is smaller than the second opening degree;
controlling the rotating speed of the first indoor fan to be a first rotating speed, and controlling the rotating speed of the second indoor fan to be a second rotating speed; wherein the first rotational speed is greater than the second rotational speed.
Controlling a compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
In a preferred embodiment, the air conditioner further comprises a four-way valve; the air exhaust port of the compressor is connected with the first end of the four-way valve, the second end of the four-way valve is connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is respectively connected with the first end of each expansion valve, the second end of each expansion valve is respectively connected with the first end of the corresponding indoor heat exchanger, the second end of each indoor heat exchanger is respectively connected with the third end of the four-way valve, and the fourth end of the four-way valve is connected with the air suction port of the compressor.
In a preferred embodiment, the four-way valve includes a first four-way valve and a second four-way valve, the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger, and the expansion valve includes a first expansion valve and a second expansion valve;
the air outlet of the compressor is respectively connected with the first end of the first four-way valve and the first end of the second four-way valve, the second end of the first four-way valve and the second end of the second four-way valve are respectively connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is respectively connected with the first end of the first expansion valve and the first end of the second expansion valve, the second end of the first expansion valve is connected with the first end of the first indoor heat exchanger, the second end of the second expansion valve is connected with the first end of the second indoor heat exchanger, the second end of the first indoor heat exchanger is connected with the third end of the first four-way valve, the second end of the second indoor heat exchanger is connected with the third end of the second four-way valve, and the fourth end of the first four-way valve and the fourth end of the second four-way valve are respectively connected with the air suction port of the compressor.
In a preferred embodiment, the air conditioner further comprises a gas-liquid separator and an electric heating belt;
the fourth end of the first four-way valve and the fourth end of the second four-way valve are respectively connected with a suction port of the compressor through the gas-liquid separator; the electric heating belt is arranged on the gas-liquid separator.
In a preferred embodiment, the controller is further configured to:
and responding to a refrigerating mode starting instruction, controlling the air conditioner to enter a refrigerating mode, and enabling the indoor heat exchanger to function as an evaporator to reduce the indoor temperature.
In a preferred embodiment, the controller is further configured to:
and responding to a heating mode starting instruction, controlling the air conditioner to enter a heating mode, and enabling the indoor heat exchanger to function as a condenser to increase the indoor temperature.
In a preferred embodiment, the controller is further configured to:
and responding to a dehumidification mode starting instruction, controlling the compressor to operate, and controlling the temperature of an indoor coil of at least one indoor heat exchanger to be lower than the dew point temperature so as to enable the air conditioner to enter a dehumidification mode and enable the indoor heat exchanger to function as an evaporator to reduce the indoor humidity.
Compared with the prior art, the embodiment of the invention discloses an air conditioner control method, an indoor unit of an air conditioner is provided with at least two indoor heat exchangers, each indoor heat exchanger is provided with a corresponding expansion valve, the opening of each expansion valve is adjusted by responding to a cellar mode starting operation instruction, the flow of a refrigerant flowing through each indoor heat exchanger is controlled, the temperature of an indoor coil of each indoor heat exchanger is further controlled, the temperature of each indoor coil is enabled to be larger than the current indoor dew point temperature, and a compressor is controlled to operate and the indoor heat exchangers are used as evaporators to play a role, so that the air conditioner operates in a cellar mode. Therefore, the embodiment of the invention can control the evaporation temperature by adopting the plurality of evaporators to simultaneously refrigerate and controlling the temperature of the indoor coil to be higher than the dew point temperature and controlling different evaporation pressures, can reduce condensation and dehumidification and slow down the reduction rate of the indoor environment humidity while achieving the refrigeration effect, further does not need to frequently replenish water indoors, reduces the consumption of water resources and reduces the risk of over-low indoor humidity.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An air conditioner, comprising:
a refrigerant circuit that circulates a refrigerant in sequence through a compressor, a condenser, an expansion valve, and an evaporator; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger;
the indoor unit is used for carrying out heat exchange with indoor air, at least two indoor heat exchangers are arranged in the indoor unit, and the indoor unit further comprises a temperature sensor corresponding to each indoor heat exchanger;
the outdoor unit is used for carrying out heat exchange with outdoor air, and the compressor and the outdoor heat exchanger are arranged in the outdoor unit;
a controller to:
responding to a cellar mode starting operation instruction, controlling the opening degree of an expansion valve corresponding to each indoor heat exchanger to be a preset cellar refrigeration opening degree so that the temperature of an indoor coil pipe monitored by each temperature sensor is larger than a preset dew point temperature, and controlling the compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
2. The air conditioner according to claim 1, wherein the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger; the expansion valve comprises a first expansion valve and a second expansion valve which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the temperature sensors comprise a first temperature sensor and a second temperature sensor which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the indoor unit further comprises a first indoor fan and a second indoor fan which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger;
the controller is specifically configured to:
responding to a cellar refrigeration starting operation instruction, controlling the opening degree of the first expansion valve to be a preset first opening degree so that the temperature of a first indoor coil of a first indoor heat exchanger monitored by the first temperature sensor is larger than a preset dew point temperature, and controlling the opening degree of the second expansion valve to be a preset second opening degree so that the temperature of a second indoor coil of a second indoor heat exchanger monitored by the second temperature sensor is larger than the temperature of the first indoor coil; wherein the first opening degree is smaller than the second opening degree;
controlling the rotating speed of the first indoor fan to be a first rotating speed, and controlling the rotating speed of the second indoor fan to be a second rotating speed; wherein the first rotational speed is greater than the second rotational speed;
controlling the compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
3. The air conditioner according to claim 1 or 2, further comprising a four-way valve; the air exhaust port of the compressor is connected with the first end of the four-way valve, the second end of the four-way valve is connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is respectively connected with the first end of each expansion valve, the second end of each expansion valve is respectively connected with the first end of the corresponding indoor heat exchanger, the second end of each indoor heat exchanger is respectively connected with the third end of the four-way valve, and the fourth end of the four-way valve is connected with the air suction port of the compressor.
4. The air conditioner according to claim 3, wherein the four-way valve includes a first four-way valve and a second four-way valve, the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger, and the expansion valve includes a first expansion valve and a second expansion valve;
the air outlet of the compressor is respectively connected with the first end of the first four-way valve and the first end of the second four-way valve, the second end of the first four-way valve and the second end of the second four-way valve are respectively connected with the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is respectively connected with the first end of the first expansion valve and the first end of the second expansion valve, the second end of the first expansion valve is connected with the first end of the first indoor heat exchanger, the second end of the second expansion valve is connected with the first end of the second indoor heat exchanger, the second end of the first indoor heat exchanger is connected with the third end of the first four-way valve, the second end of the second indoor heat exchanger is connected with the third end of the second four-way valve, and the fourth end of the first four-way valve and the fourth end of the second four-way valve are respectively connected with the air suction port of the compressor.
5. The air conditioner according to claim 4, further comprising a gas-liquid separator and an electric heating belt;
the fourth end of the first four-way valve and the fourth end of the second four-way valve are respectively connected with a suction port of the compressor through the gas-liquid separator; the electric heating belt is arranged on the gas-liquid separator.
6. The air conditioner of claim 4, wherein the controller is further configured to:
and responding to a refrigerating mode starting instruction, controlling the air conditioner to enter a refrigerating mode, and enabling the indoor heat exchanger to function as an evaporator to reduce the indoor temperature.
7. The air conditioner of claim 4, wherein the controller is further configured to:
and responding to a heating mode starting instruction, controlling the air conditioner to enter a heating mode, and enabling the indoor heat exchanger to function as a condenser to increase the indoor temperature.
8. The air conditioner according to claim 4, wherein said controller is further configured to:
and responding to a dehumidification mode starting instruction, controlling the compressor to operate, and controlling the temperature of an indoor coil of at least one indoor heat exchanger to be lower than the dew point temperature so as to enable the air conditioner to enter a dehumidification mode and enable the indoor heat exchanger to function as an evaporator to reduce the indoor humidity.
9. An air conditioner control method, characterized in that the air conditioner comprises:
a refrigerant circuit that circulates a refrigerant in sequence through a compressor, a condenser, an expansion valve, and an evaporator; one of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger;
the indoor unit is used for carrying out heat exchange with indoor air, at least two indoor heat exchangers are arranged in the indoor unit, and the indoor unit further comprises a temperature sensor corresponding to each indoor heat exchanger;
the outdoor unit is used for carrying out heat exchange with outdoor air, and the compressor and the outdoor heat exchanger are arranged in the outdoor unit;
the method comprises the following steps:
responding to a cellar mode starting operation instruction, controlling the opening degree of an expansion valve corresponding to each indoor heat exchanger to be a preset cellar refrigeration opening degree so that the temperature of an indoor coil pipe monitored by each temperature sensor is larger than a preset dew point temperature, and controlling the compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
10. The air conditioner controlling method as claimed in claim 9, wherein the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger; the expansion valve comprises a first expansion valve and a second expansion valve which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the temperature sensors comprise a first temperature sensor and a second temperature sensor which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger; the indoor unit also comprises a first indoor fan and a second indoor fan which respectively correspond to the first indoor heat exchanger and the second indoor heat exchanger;
the method specifically comprises the following steps:
responding to a cellar refrigeration starting operation instruction, controlling the opening degree of the first expansion valve to be a preset first opening degree so that the temperature of a first indoor coil of a first indoor heat exchanger monitored by the first temperature sensor is larger than a preset dew point temperature, and controlling the opening degree of the second expansion valve to be a preset second opening degree so that the temperature of a second indoor coil of a second indoor heat exchanger monitored by the second temperature sensor is larger than the temperature of the first indoor coil; wherein the first opening degree is smaller than the second opening degree;
controlling the rotating speed of the first indoor fan to be a first rotating speed, and controlling the rotating speed of the second indoor fan to be a second rotating speed; wherein the first rotational speed is greater than the second rotational speed;
controlling a compressor to operate so that the air conditioner enters a cellar mode; wherein the indoor heat exchanger in the cellar mode functions as an evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211499893.XA CN115900021A (en) | 2022-11-28 | 2022-11-28 | Air conditioner and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211499893.XA CN115900021A (en) | 2022-11-28 | 2022-11-28 | Air conditioner and control method thereof |
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| CN115900021A true CN115900021A (en) | 2023-04-04 |
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| CN202211499893.XA Pending CN115900021A (en) | 2022-11-28 | 2022-11-28 | Air conditioner and control method thereof |
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| CN (1) | CN115900021A (en) |
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