CN111928432A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
- Publication number
- CN111928432A CN111928432A CN202010722798.6A CN202010722798A CN111928432A CN 111928432 A CN111928432 A CN 111928432A CN 202010722798 A CN202010722798 A CN 202010722798A CN 111928432 A CN111928432 A CN 111928432A
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- heat exchanger
- air conditioner
- current
- side heat
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: detecting whether the condensed water reaches a preset water level; if yes, detecting the current environment humidity RHs; and determining the frequency reduction value of the compressor according to the current environment humidity RHS, and reducing the current running frequency of the compressor according to the frequency reduction value. According to the control method of the air conditioner, the reduction of the condensed water and the utilization of the heat exchange capacity can be considered, and the control method has the advantages of low energy consumption, high energy efficiency, low noise and the like.
Description
Technical Field
The invention relates to the technical field of air-conditioning equipment, in particular to a control method of an air conditioner.
Background
Air conditioner among the correlation technique, when refrigeration or dehumidification, the comdenstion water in the evaporimeter is difficult to direct discharge, get rid of the condenser through the water in the wheel water collector of beating water on, the heat that utilizes the condenser makes its evaporation, and lead to the exhaust pipe with its discharge outdoor, however, along with the increase of ambient humidity, the evaporating water volume is more and more, lead to the water collector to be full of water, shut down for preventing that the water collector is full of water, reduce indoor fan rotational speed or improve the rotational speed of the motor of beating water usually, nevertheless reduce the indoor fan rotational speed and can lead to condenser pressure to improve, energy loss increases, the efficiency reduces, and the rotational speed that improves the motor of beating water can produce the noise, influence user experience.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling an air conditioner, which can reduce condensed water and utilize heat exchange capacity at the same time, and has the advantages of low energy consumption, high energy efficiency, low noise, etc.
To achieve the above object, a control method of an air conditioner according to an embodiment of the present invention includes: detecting whether the condensed water reaches a preset water level; if yes, detecting the current environment humidity RHs; and determining the frequency reduction value of the compressor according to the current environment humidity RHS, and reducing the current running frequency of the compressor according to the frequency reduction value.
According to the control method of the air conditioner, the reduction of the condensed water and the utilization of the heat exchange capacity can be considered, and the control method has the advantages of low energy consumption, high energy efficiency, low noise and the like.
According to some embodiments of the invention, the greater the current ambient humidity RHS, the greater the downconversion; the smaller the current ambient humidity RHS is, the smaller the frequency reduction value is.
According to some embodiments of the invention, the reduction frequency value is a percentage.
Further, the determining the frequency reduction value of the compressor according to the current ambient humidity RHs includes: comparing the current ambient humidity RHs with a first preset humidity RHs1 and a second preset humidity RHs 2; if the current environment humidity RHS is larger than or equal to the first preset humidity RHS1, the frequency reduction value of the compressor is b 1%; if the first preset humidity RHS1 > the current environment humidity RHS > the second preset humidity RHS2, the frequency reduction value of the compressor is b 2%; if the current environment humidity RHS is less than or equal to the second preset humidity RHS2, the frequency reduction value of the compressor is b 3%; wherein the first preset humidity RHs1 > s, the second preset humidity RHs2, b 1% > s, b 2% > s, b 3%.
According to some embodiments of the present invention, before the current operation frequency of the compressor is reduced, an initial temperature T0 of the outdoor side heat exchanger is detected; detecting a current temperature T1 of the outdoor side heat exchanger after reducing a current operation frequency of the compressor; if the current temperature T1 of the outdoor side heat exchanger is higher than the initial temperature T0+ X of the outdoor side heat exchanger, the condensing temperature is increased; if the current temperature T1 of the outdoor side heat exchanger is less than the initial temperature T0-X of the outdoor side heat exchanger, reducing the condensation temperature; if the initial temperature T0-X of the outdoor heat exchanger is less than or equal to the current temperature T1 of the outdoor heat exchanger is less than or equal to the initial temperature T0+ X of the outdoor heat exchanger, keeping the condensing temperature unchanged; wherein X is a correction value.
Further, the increase in the condensation temperature is performed by reducing the opening degree of the throttling means between the outdoor side heat exchanger and the indoor side heat exchanger; the reduction of the condensation temperature is performed by increasing the opening degree of the throttling means between the outdoor side heat exchanger and the indoor side heat exchanger.
According to some embodiments of the invention, the correction value X is between 0.5 ℃ and 1.5 ℃.
According to some embodiments of the invention, the initial temperature T0 of the outdoor heat exchanger is the coil temperature of the compressor down conversion pre-outdoor heat exchanger; the current temperature T1 of the outdoor side heat exchanger is the coil temperature of the outdoor side heat exchanger after the compressor frequency reduction.
According to some embodiments of the present invention, the control method of the air conditioner further comprises: detecting a current mode of the air conditioner; and if the air conditioner is in a cooling mode or a dehumidifying mode, detecting whether the condensed water reaches a preset water level.
According to some embodiments of the invention, the air conditioner is a mobile air conditioner.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an air conditioner according to an embodiment of the present invention;
fig. 3 is a structural view illustrating another direction of the air conditioner according to the embodiment of the present invention.
Reference numerals:
an air conditioner 1,
An outdoor heat exchanger 10, an outdoor fan 11, an outdoor air duct 12, a throttling device 13, a compressor 14,
A tube temperature sensor 16,
Indoor side heat exchanger 20, indoor fan 21, indoor wind channel 22.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A control method of an air conditioner according to an embodiment of the present invention will be described with reference to fig. 1 to 3.
As shown in fig. 1, a control method of an air conditioner according to an embodiment of the present invention includes:
detecting whether the condensed water reaches a preset water level, for example, detecting whether the condensed water reaches the preset water level by detecting whether a water level switch is closed;
if yes, and the water level switch is closed, detecting the current environment humidity RHs, wherein the environment humidity RHs can be detected by a humidity sensor.
And determining the frequency reduction value of the compressor according to the current environment humidity RHS, and reducing the current running frequency of the compressor according to the frequency reduction value.
According to the control method of the air conditioner, whether the condensate water reaches the preset water level or not is detected, the current environment humidity RHS is further detected, the compressor frequency reduction value is determined, and then the current operation frequency of the compressor is reduced. Thereby reducing the generation of condensed water and avoiding the stop of the water receiving tray when the water receiving tray is full of water.
And the amount of condensed water of the evaporator is reduced by reducing the compression frequency, the rotating speed of an outdoor fan is not required to be reduced, the normal operation of the condenser is ensured, the pressure of the condenser is effectively reduced, the operating efficiency of the condenser is improved, the energy consumption is reduced, and the energy efficiency is improved. And the rotating speed of the water fetching motor is not required to be increased, so that the noise generated by the water fetching motor is effectively reduced, and the user experience is improved.
In addition, the air conditioner quantitatively adjusts different frequency reduction values of the compressor according to the current environment humidity RHS, so that the compressor can work normally, and meanwhile, the generation of condensed water is reasonably controlled. That is, the present invention determines the frequency reduction value of the compressor according to the current ambient humidity RHs instead of simply reducing the operating frequency of the compressor, so that the frequency of the adjusted compressor can take into account the reduction of the condensed water and the utilization of the heat exchange capacity, that is, the frequency reduction value of the compressor is determined according to the current ambient humidity RHs, and the operating frequency of the compressor can be utilized to the maximum extent while the reduction of the condensed water is ensured, thereby ensuring the heat exchange capacity.
Therefore, the control method of the air conditioner provided by the embodiment of the invention can give consideration to both the reduction of the condensed water and the utilization of the heat exchange capacity, and has the advantages of low energy consumption, high energy efficiency, low noise and the like.
In some embodiments of the present invention, as shown in FIG. 1, the higher the current ambient humidity RHs, the higher the frequency reduction value. The smaller the current ambient humidity RHs, the smaller the down-conversion value. Therefore, the running frequency of the compressor can be effectively adjusted according to the current environment humidity RHS, so that the overall heat exchange capacity of the air conditioner is ensured under any working condition, and the condition that the compressor is too large or too small in frequency reduction is avoided.
For example, when the current ambient humidity RHs is large, it becomes difficult for the condenser to evaporate the condensed water, and the generation of the condensed water in the evaporator is reduced to a greater extent by increasing the frequency reduction value. When current environment humidity RHS is less, the condenser can also continue to evaporate the comdenstion water, and it is less through setting up the frequency reduction value, guarantees the work efficiency of compressor.
In some embodiments of the invention, the reduction frequency value is a percentage. Therefore, the control logic and the operation process are further simplified, the correspondence between the frequency reduction value and the current environment humidity RHs is ensured, the energy efficiency and the comfort level are ensured while the energy saving is realized, and the frequency reduction adjustment of the compressor is facilitated.
Further, as shown in fig. 1, determining the down-conversion value of the compressor according to the current ambient humidity RHs includes:
comparing the current ambient humidity RHs with a first preset humidity RHs1 and a second preset humidity RHs 2;
if the current environment humidity RHS is larger than or equal to the first preset humidity RHS1, the frequency reduction value of the compressor is b 1%;
if the first preset humidity RHS1 > the current environment humidity RHS > the second preset humidity RHS2, the frequency reduction value of the compressor is b 2%;
if the current environment humidity RHS is less than or equal to the second preset humidity RHS2, the frequency reduction value of the compressor is b 3%;
wherein the first preset humidity RHs1 > s, the second preset humidity RHs2, b 1% > s, b 2% > s, b 3%.
Two thresholds of a first preset humidity RHS1 and a second preset humidity RHS2 are preset in the air conditioner system and are compared with the current ambient temperature RHS, so that the frequency reduction value of the compressor can be adjusted in a segmented mode according to the ambient humidity, and the accuracy of determining the frequency reduction value of the compressor is improved.
An air conditioner 1 according to an embodiment of the present invention is described below by way of example.
As shown in fig. 2 and 3, the air conditioner 1 according to the embodiment of the present invention is a mobile air conditioner. The mobile air conditioner is of an integrated structure and comprises components such as an outdoor heat exchanger 10, a compressor 14, an indoor heat exchanger 20, a throttling device 13 and the like, wherein the outdoor heat exchanger 10, the compressor 14, the indoor heat exchanger 20 and the throttling device 13 are connected into a refrigerant circuit. And are installed in the same box.
The mobile air conditioner is provided with an outdoor air duct 12 and an outdoor fan 11 corresponding to the outdoor heat exchanger 10, and the air guiding quantity of the outdoor heat exchanger 10 is controlled by the outdoor fan 11, so that air is circularly blown to the outdoor heat exchanger 10.
The mobile air conditioner is also provided with an indoor air duct 22 and an indoor fan 21 which correspond to the indoor side heat exchanger 20, the air guide quantity of the indoor side heat exchanger 20 is controlled through the indoor fan 21, so that the air supply is used for carrying out temperature regulation of a closed or local space, and the mobile air conditioner also has a dehumidification function and meets refrigeration and dehumidification requirements of users.
Wherein, the mobile air conditioner is in a cooling mode or a dehumidifying mode. The indoor heat exchanger 20 is used as an evaporator, and the outdoor heat exchanger 10 is used as a condenser.
In addition, the air conditioner 1 may be optionally provided with a coil temperature sensor 16 for detecting the coil temperature of the outdoor side heat exchanger 10.
In some embodiments of the present invention, as shown in fig. 1, before the current operating frequency of the compressor is reduced, an initial temperature T0 of the outdoor side heat exchanger is detected;
detecting a current temperature T1 of the outdoor side heat exchanger after reducing a current operation frequency of the compressor;
if the current temperature T1 of the outdoor side heat exchanger is higher than the initial temperature T0+ X of the outdoor side heat exchanger, the condensing temperature is increased;
if the current temperature T1 of the outdoor side heat exchanger is less than the initial temperature T0-X of the outdoor side heat exchanger, reducing the condensation temperature;
and if the initial temperature T0-X of the outdoor heat exchanger is less than or equal to the current temperature T1 of the outdoor heat exchanger is less than or equal to the initial temperature T0+ X of the outdoor heat exchanger, keeping the condensation temperature unchanged.
Wherein X is a correction value, which can be measured or calculated by experiment, for example, the correction value X is 0.5-1.5 ℃. For another example, the correction value X may be 1 ℃.
Further, the increase in the condensation temperature is performed by reducing the opening degree of the throttling means between the outdoor side heat exchanger and the indoor side heat exchanger. The reduction of the condensation temperature is performed by increasing the opening degree of the throttling means between the outdoor side heat exchanger and the indoor side heat exchanger.
The flow of the throttling device is improved or reduced by controlling the opening of the throttling device, so that the effect of adjusting the condensation temperature is achieved. The opening degree of the throttling device is reduced, so that the condensing temperature can be increased, the evaporation speed of condenser water is increased, condensed water is evaporated in time, and the normal operation of the air conditioner is guaranteed. The opening degree of the throttling device is increased, so that the condensation temperature can be reduced, the evaporation speed of condensed water is further reduced, and the energy efficiency of the air conditioner is guaranteed. Wherein the throttling device may be an electronic expansion valve.
Optionally, the initial temperature T0 of the outdoor side heat exchanger is the coil temperature of the compressor down pre-chamber outside heat exchanger. The current temperature T1 of the outdoor side heat exchanger is the coil temperature of the outdoor side heat exchanger after the compressor frequency reduction.
The temperature of the coil of the outdoor heat exchanger after the compressor is subjected to frequency reduction can be measured by the temperature sensor. By detecting the coil temperature of the outdoor side heat exchanger, the accuracy of detecting the initial temperature T0 of the outdoor side heat exchanger and the current temperature T1 of the outdoor side heat exchanger is improved.
In some embodiments of the present invention, as shown in fig. 1, the method for controlling an air conditioner further includes:
detecting a current mode of the air conditioner;
and if the air conditioner is in a cooling mode or a dehumidifying mode, detecting whether the condensed water reaches a preset water level.
Since the generation of the condensed water mostly occurs in the cooling mode or the dehumidifying mode, the control strategy for the condensed water may be performed under a necessary condition by detecting the current mode of the air conditioner, and the air conditioner may be normally operated under some unnecessary conditions.
According to the control method of the air conditioner, logic (software) of the control method is written into a control chip of the air conditioner, and the control chip is matched with the existing detection means of the air conditioner, such as a temperature sensor, a humidity sensor and the like, so that the energy consumption can be effectively reduced in time and the operation efficiency can be improved under the conditions of not greatly increasing the cost and not making large system changes.
The air conditioner 1 in the present application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, a throttle device, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor 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. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The throttling device expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner 1 can adjust the temperature of the indoor space throughout the cycle.
In the description herein, references to the description of "a particular embodiment," "a particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of controlling an air conditioner, comprising:
detecting whether the condensed water reaches a preset water level;
if yes, detecting the current environment humidity RHs;
and determining the frequency reduction value of the compressor according to the current environment humidity RHS, and reducing the current running frequency of the compressor according to the frequency reduction value.
2. The control method of an air conditioner according to claim 1, wherein the greater the current ambient humidity RHS, the greater the down conversion value;
the smaller the current environment humidity RHs is, the smaller the frequency reduction value is.
3. The control method of an air conditioner according to claim 1, wherein the down conversion value is a percentage.
4. The method of claim 3, wherein the determining the down-conversion value of the compressor according to the current ambient humidity RHs comprises:
comparing the current ambient humidity RHs with a first preset humidity RHs1 and a second preset humidity RHs 2;
if the current environment humidity RHS is larger than or equal to the first preset humidity RHS1, the frequency reduction value of the compressor is b 1%;
if the first preset humidity RHS1 > the current environment humidity RHS > the second preset humidity RHS2, the frequency reduction value of the compressor is b 2%;
if the current environment humidity RHS is less than or equal to the second preset humidity RHS2, the frequency reduction value of the compressor is b 3%;
wherein the first preset humidity RHs1 > s, the second preset humidity RHs2, b 1% > s, b 2% > s, b 3%.
5. The control method of an air conditioner according to claim 1, wherein before the current operating frequency of the compressor is lowered, an initial temperature T0 of the outdoor side heat exchanger is detected;
detecting a current temperature T1 of the outdoor side heat exchanger after reducing a current operation frequency of the compressor;
if the current temperature T1 of the outdoor side heat exchanger is higher than the initial temperature T0+ X of the outdoor side heat exchanger, the condensing temperature is increased;
if the current temperature T1 of the outdoor side heat exchanger is less than the initial temperature T0-X of the outdoor side heat exchanger, reducing the condensation temperature;
if the initial temperature T0-X of the outdoor heat exchanger is less than or equal to the current temperature T1 of the outdoor heat exchanger is less than or equal to the initial temperature T0+ X of the outdoor heat exchanger, keeping the condensing temperature unchanged;
wherein X is a correction value.
6. The control method of an air conditioner according to claim 5, wherein the increase in the condensing temperature is performed by reducing an opening degree of a throttling device between the outdoor side heat exchanger and the indoor side heat exchanger;
the reduction of the condensation temperature is performed by increasing the opening degree of the throttling means between the outdoor side heat exchanger and the indoor side heat exchanger.
7. The method of claim 5, wherein the correction value X is 0.5 to 1.5 ℃.
8. The control method of an air conditioner according to claim 5, wherein the initial temperature T0 of the outdoor side heat exchanger is a coil temperature of a compressor down-conversion outdoor side heat exchanger;
the current temperature T1 of the outdoor side heat exchanger is the coil temperature of the outdoor side heat exchanger after the compressor frequency reduction.
9. The control method of an air conditioner according to any one of claims 1 to 8, further comprising:
detecting a current mode of the air conditioner;
and if the air conditioner is in a cooling mode or a dehumidifying mode, detecting whether the condensed water reaches a preset water level.
10. The control method of an air conditioner according to any one of claims 1 to 8, wherein the air conditioner is a mobile air conditioner.
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| CN202010722798.6A CN111928432B (en) | 2020-07-24 | 2020-07-24 | Control method of air conditioner |
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| CN202010722798.6A CN111928432B (en) | 2020-07-24 | 2020-07-24 | Control method of air conditioner |
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| CN113587347A (en) * | 2021-07-26 | 2021-11-02 | 海信（广东）空调有限公司 | Water level control method for air conditioner |
| CN114517955A (en) * | 2022-03-01 | 2022-05-20 | 海信（广东）空调有限公司 | Mobile air conditioner and control method thereof |
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| CN111928432B (en) | 2021-12-14 |
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