CN112902314B - Air conditioner and control method for improving condensation and water blowing of air conditioner - Google Patents

Air conditioner and control method for improving condensation and water blowing of air conditioner Download PDF

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Publication number
CN112902314B
CN112902314B CN202110138165.5A CN202110138165A CN112902314B CN 112902314 B CN112902314 B CN 112902314B CN 202110138165 A CN202110138165 A CN 202110138165A CN 112902314 B CN112902314 B CN 112902314B
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temperature
revision
air conditioner
pipe coil
air
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CN112902314A (en
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李君飞
郑士坡
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/42—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger characterised by the use of the condensate, e.g. for enhanced cooling
    • 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
    • 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
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner and a control method for improving condensation water blowing of the air conditioner, wherein the air conditioner comprises at least one indoor unit, an outdoor unit, a compressor, an air outlet temperature sensor, a liquid pipe coil temperature sensor, an air pipe coil temperature sensor and a controller, wherein the controller is configured to: determining a first revision value based on the air outlet temperature and determining a second revision value based on the air outlet temperature and the number of outdoor units; when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature and the first revision value and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature and the second revision value; and controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature, so that the condensation water blowing phenomenon of the air conditioner is reasonably improved, and the experience of a user is improved.

Description

Air conditioner and control method for improving condensation and water blowing of air conditioner
Technical Field
The present application relates to the field of air conditioner control, and more particularly, to an air conditioner and a control method for improving condensation and blowing water of the air conditioner.
Background
In an air conditioner in which one outdoor unit is connected to a plurality of indoor units, condensation and water blowing of the indoor units often occur.
In the prior art, the distribution uniformity of the indoor units is regulated by regulating the specifications of the distribution capillary tubes, but the wall-mounted unit of the multi-connected air conditioner is a general indoor unit, the connected multi-connected outdoor units are various in types, the control of the frequency and the superheat degree of the compressor is more various in types during refrigeration operation, and when the refrigeration operation under the small-load condensation working condition occurs, the control of the frequency and the superheat degree of the compressor of the multi-connected outdoor units is different, so that the problem of uneven distribution caused by insufficient flow of condensation water and refrigerant outside the indoor units and the problem of condensation water blowing inside the indoor units are easily caused by too low air outlet temperature, and the air conditioner products with more complicated types can not be adapted only through the solidified distribution capillary tubes from the analysis.
Therefore, how to reasonably improve the condensation water blowing phenomenon of the air conditioner is a technical problem to be solved at present.
Disclosure of Invention
The invention provides an air conditioner, which is used for solving the technical problem that the condensation water blowing phenomenon of the air conditioner cannot be reasonably improved in the prior art, and comprises the following components:
at least one indoor unit including an indoor heat exchanger operating as a condenser or an evaporator;
the outdoor unit comprises a compressor, wherein the compressor is used for compressing low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser;
the air outlet temperature sensor is used for detecting the air outlet temperature of the indoor unit;
the liquid pipe coil temperature sensor is used for detecting the temperature of the liquid pipe coil of the indoor unit;
the air pipe coil temperature sensor is used for detecting the temperature of the air pipe coil of the indoor unit;
a controller configured to:
determining a first revision value based on the air outlet temperature and determining a second revision value based on the air outlet temperature and the number of outdoor units;
when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature and the first revision value and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature and the second revision value;
controlling the air conditioner based on the liquid coil revision temperature and the air coil revision temperature;
the first preset condition is that the air conditioner is in a refrigerating or dehumidifying mode, the low-pressure of the air conditioner is smaller than preset pressure, the air conditioner is not in a high-wind running mode, and the air outlet temperature is not larger than preset temperature.
In some embodiments, the controller is specifically configured to:
controlling the frequency of the compressor based on the liquid pipe coil revision temperature and controlling the opening of an electronic expansion valve of the indoor unit based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In some embodiments, the controller is configured to:
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value;
when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is smaller than the first revision value.
In some embodiments, the controller is configured to:
when the total working number of each indoor unit is larger than a second preset number, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the working total number of each indoor unit is not greater than the second preset number and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In some embodiments, the controller is configured to:
when the starting time of the air conditioner is smaller than a preset time, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the starting time of the air conditioner is not less than the preset time and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In some embodiments, the controller is configured to:
and when the air conditioner is not in the first preset condition, controlling the air conditioner based on the liquid pipe coil temperature and the air pipe coil temperature.
Correspondingly, the invention also provides a control method for improving condensation water blowing of the air conditioner, which is applied to the air conditioner comprising at least one indoor unit, an outdoor unit, a compressor, an air outlet temperature sensor, a liquid pipe coil temperature sensor, an air pipe coil temperature sensor and a controller, and comprises the following steps:
determining a first revision value based on the air outlet temperature of the indoor unit and determining a second revision value based on the air outlet temperature and the number of outdoor units;
when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature of the indoor unit and the first revision value, and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature of the indoor unit and the second revision value;
controlling the air conditioner based on the liquid coil revision temperature and the air coil revision temperature;
the first preset condition is that the air conditioner is in a refrigerating or dehumidifying mode, the low-pressure of the air conditioner is smaller than preset pressure, the air conditioner is not in a high-wind running mode, and the air outlet temperature is not larger than preset temperature.
In some embodiments, the air conditioner is controlled based on the liquid coil revision temperature and the air coil revision temperature, specifically:
and controlling the frequency of the compressor based on the liquid pipe coil revision temperature and controlling the opening degree of an electronic expansion valve of the indoor unit based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In some embodiments, the first revision value is determined based on the outlet air temperature and the second revision value is determined based on the outlet air temperature and the number of outdoor units, specifically:
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value;
when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is smaller than the first revision value.
In some embodiments, the method further comprises:
when the total working number of each indoor unit is larger than a second preset number, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the working total number of each indoor unit is not greater than the second preset number and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
Compared with the prior art, the application has the following beneficial effects:
the invention discloses an air conditioner and a control method for improving condensation water blowing of the air conditioner, wherein the air conditioner comprises at least one indoor unit, an outdoor unit, a compressor, an air outlet temperature sensor, a liquid pipe coil temperature sensor, an air pipe coil temperature sensor and a controller, wherein the controller is configured to: determining a first revision value based on the air outlet temperature and determining a second revision value based on the air outlet temperature and the number of outdoor units; when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature and the first revision value and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature and the second revision value; and controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature, so that the condensation water blowing phenomenon of the air conditioner is reasonably improved, and the experience of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing the structure of an air conditioner of an embodiment;
fig. 2 is a flow chart of a control method for improving condensation and water blowing of an air conditioner according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
An outdoor unit of an air conditioner in this embodiment is connected with at least one indoor unit, as shown in fig. 1, each indoor unit includes an indoor heat exchanger working as a condenser or an evaporator, an air outlet temperature sensor (2) for detecting the air outlet temperature of the indoor unit, a liquid pipe coil temperature sensor (3) for detecting the liquid pipe coil temperature of the indoor unit, a liquid pipe coil temperature sensor (4) for detecting the air pipe coil temperature of the indoor unit, and an electronic expansion valve (5) arranged on the liquid pipe of the indoor unit, the indoor unit includes a compressor (1), and the compressor (1) compresses low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharges the high-pressure refrigerant gas to the condenser.
In one embodiment of the present application, as shown in fig. 1, an air conditioner includes:
at least one indoor unit including an indoor heat exchanger operating as a condenser or an evaporator;
the outdoor unit comprises a compressor (1), wherein the compressor (1) is used for compressing low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser;
an air outlet temperature sensor (2) for detecting the air outlet temperature of the indoor unit;
a liquid pipe coil temperature sensor (3) for detecting the temperature of the liquid pipe coil of the indoor unit;
the air pipe coil temperature sensor (4) is used for detecting the temperature of the air pipe coil of the indoor unit;
a controller configured to:
determining a first revision value based on the air outlet temperature and determining a second revision value based on the air outlet temperature and the number of outdoor units;
when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature and the first revision value and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature and the second revision value;
controlling the air conditioner based on the liquid coil revision temperature and the air coil revision temperature;
the first preset condition is that the air conditioner is in a refrigerating or dehumidifying mode, the low-pressure of the air conditioner is smaller than preset pressure, the air conditioner is not in a high-wind running mode, and the air outlet temperature is not larger than preset temperature.
In this embodiment, the controller determines a first revised value according to the air outlet temperature of the indoor unit, optionally, first determines a first revised value at a certain air outlet temperature through experiments, then adjusts the first revised value correspondingly according to the change of the air outlet temperature of the indoor unit on the basis, generally, the first revised value decreases with the increase of the air outlet temperature, and correspondingly determines a second revised value which also decreases with the increase of the air outlet temperature according to the air outlet temperature of the indoor unit and the number of outdoor units, when the air conditioner is in a first preset condition, determines a liquid pipe coil revised temperature according to the difference between the liquid pipe coil temperature and the first revised value, and determines a gas pipe coil revised temperature according to the difference between the gas pipe coil temperature and the second revised value, wherein the first preset condition is that the air conditioner is in a refrigeration mode or a dehumidification mode, and the low pressure of the air conditioner is smaller than a preset pressure, the air conditioner is not in a high-wind operation mode, the air outlet temperature is not greater than the preset temperature, the low-pressure of the air conditioner can be measured by a low-pressure sensor arranged at the outlet of the gas-liquid separator, of course, the embodiment does not limit the specific acquisition mode of the low-pressure, a technician can set the air conditioner according to the actual use requirement, as long as the high-pressure and the low-pressure of the air conditioner unit can be acquired through the method, for example, the air conditioner can be directly measured through the pressure sensor or can be obtained through other parameter calculation, because the phenomenon of condensation and water blowing of the indoor unit is easy to occur when the air conditioner is in the first preset condition, the liquid pipe coil temperature is revised through a first revision value and the liquid pipe coil temperature is revised through a second revision value, the liquid pipe coil revision temperature and the air pipe coil revision temperature are respectively obtained, then the operation of the air conditioner is controlled through the liquid pipe coil revision temperature and the air pipe coil revision temperature, and as the revised temperature is smaller than the actually detected temperature, the air conditioner can default to excessive capacity output so as to reduce the output capacity, and further the air outlet temperature of the indoor unit is improved, thereby achieving the purpose of improving the condensation water blowing phenomenon of the indoor unit.
To accurately control an air conditioner based on a revised temperature, in some embodiments, the controller is specifically configured to:
controlling the frequency of the compressor based on the liquid pipe coil revision temperature and controlling the opening of an electronic expansion valve of the indoor unit based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In this embodiment, when the air conditioner is in the first preset condition, after the liquid pipe coil revision temperature and the air pipe coil revision temperature are determined, the frequency of the compressor is controlled based on the liquid pipe coil revision temperature, so that the air outlet temperature of the indoor unit is improved by reducing the frequency of the compressor, and meanwhile, the opening of the electronic expansion valve of the indoor unit is controlled based on the liquid pipe coil revision temperature and the air pipe coil revision temperature, so that excessive closing of the opening of the electronic expansion valve caused by excessively high superheat of the outdoor unit refrigeration is avoided, uneven indoor unit refrigerant distribution caused by less refrigerant flow of the indoor unit is further avoided, and the superheat of the outdoor unit refrigeration is the difference between the air pipe coil temperature and the liquid pipe coil temperature.
It should be noted that the solution of the above preferred embodiment is only one specific implementation proposed in the present application, and other methods for controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature are all within the scope of protection of the present application.
To further avoid the problem of water blowing caused by condensation inside the indoor unit, in some embodiments, the controller is configured to:
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value;
when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is smaller than the first revision value.
In this example, the first preset number of matches may be set according to needs, and this embodiment is not limited to a specific value of the first preset number of matches, where the first preset number of matches is only used to reflect whether the degree of superheat of the outdoor unit is high, that is, whether the difference between the temperature of the air pipe coil and the temperature of the liquid pipe coil is high, and when the number of matches of the outdoor unit is smaller than the first preset number of matches, this indicates that the capacity of the outdoor unit is smaller, the degree of superheat of the outdoor unit is not high, and at this time, no indoor unit refrigerant split is generally generated, so that the second revision value is equal to the first revision value, and thus, the degree of superheat of the outdoor unit is not changed, and when the number of matches of the outdoor unit is not smaller than the first preset number, the degree of superheat of the outdoor unit is higher, and indoor unit refrigerant split is easy to be uneven, so that the second revision value is smaller than the first revision value, and the degree of superheat of the refrigeration obtained by this revision is reduced, and thus the opening of the electronic expansion valve is not excessively adjusted. For example, the actual measured air tube coil temperature value is 20, the actual measured liquid tube coil temperature is 13, and the original refrigeration superheat degree is: 20-13=7, and if the first correction value is 3 and the second correction value is 1, the corrected refrigeration superheat is: 17-12=5, the corrected superheat degree is reduced, and the opening of the electronic expansion valve is larger than the opening adjusted according to the original refrigeration superheat degree, so that the problem of water blowing caused by condensation in the indoor unit due to overlarge temperature difference after condensing the humid air caused by uneven flow distribution is avoided.
It should be noted that the above solution of the preferred embodiment is only one specific implementation scheme provided in the present application, and other methods for determining the first revision value based on the air outlet temperature and determining the second revision value based on the air outlet temperature and the number of outdoor units are all within the protection scope of the present application.
To further improve the air conditioner condensation water blowing phenomenon, in some embodiments, the controller is configured to:
when the total working number of each indoor unit is larger than a second preset number, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the working total number of each indoor unit is not greater than the second preset number and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In this embodiment, further considering the total number of indoor units, when the total number of indoor units is not greater than the second preset number and the air conditioner is under the first preset condition, the compressor of the outdoor unit is excessively output due to excessively large discharge capacity, so that the phenomenon of condensation and water blowing caused by excessively low air outlet temperature of the indoor unit is easily caused, and the air conditioner is controlled based on the revised temperature of the liquid pipe coil and the revised temperature of the air pipe coil at this time; when the total working number of each indoor unit is larger than the second preset number, the second preset number can be obtained through experiments, at the moment, the compressor of the outdoor unit cannot be excessively output, condensation water blowing phenomenon cannot easily occur, and meanwhile, in order to save energy, the air conditioner is controlled based on the actually detected liquid pipe coil temperature and air pipe coil temperature.
It should be noted that the above scheme of the preferred embodiment is only one specific implementation scheme provided in the present application, and other methods for determining excessive output of the outdoor unit belong to the protection scope of the present application, for example, whether the outdoor unit is excessively output may be determined by the number of indoor units that are turned on.
To accurately improve the condensation water blowing phenomenon, in some embodiments, the controller is configured to:
when the starting time of the air conditioner is smaller than a preset time, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the starting time of the air conditioner is not less than the preset time and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In this embodiment, when the air conditioner start-up time is less than a preset time, the preset time may be set as required, and the air conditioner start-up time is relatively short, generally no condensation water blowing phenomenon occurs, and the running state of the air conditioner is unstable, so that the air conditioner is controlled based on the liquid pipe coil temperature and the air pipe coil temperature; when the air conditioner is started for a period of time not less than the preset time and is in the first preset condition, the air conditioner is operated for a period of time, the state is stable and is in the first preset condition, and therefore the air conditioner is controlled based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In order not to affect the normal use of the air conditioner, in some embodiments, the controller is configured to:
and when the air conditioner is not in the first preset condition, controlling the air conditioner based on the liquid pipe coil temperature and the air pipe coil temperature.
In this embodiment, the condensation water blowing phenomenon may occur only when the air conditioner is in the cooling or dehumidifying mode, and meanwhile, when the air conditioner is in the high-wind operation mode, the condensation water blowing phenomenon is generally not easy to occur due to the large air volume and the large air flow, and when the low-pressure of the air conditioner is smaller than the preset pressure, the condensation water blowing phenomenon is easy to occur, and when the air outlet temperature of the air conditioner is greater than the preset temperature, the condensation water blowing phenomenon is not occurred due to the fact that the air outlet temperature is higher at the moment, so that when the air conditioner is not in the first preset condition, the condensation water blowing phenomenon does not need to be considered at the moment, and the air conditioner is controlled based on the actually detected liquid pipe coil temperature and the actually detected air pipe coil temperature.
The invention discloses an air conditioner, which comprises at least one indoor unit, an outdoor unit, a compressor, an air outlet temperature sensor, a liquid pipe coil temperature sensor, an air pipe coil temperature sensor and a controller, wherein the controller is configured to: determining a first revision value based on the air outlet temperature and determining a second revision value based on the air outlet temperature and the number of outdoor units; when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature and the first revision value and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature and the second revision value; the temperature of the liquid pipe coil and the temperature of the air pipe coil are automatically revised, so that the superheat degree and the compressor frequency of the outdoor unit under the refrigeration condition are changed, the air outlet temperature of the indoor unit is further improved, the refrigerant flow of the indoor unit is increased, and the problems of condensation of the wall hanging machine and water blowing caused by uneven distribution are solved.
In order to further explain the technical idea of the invention, the invention also provides a control method for improving condensation and blowing water of an air conditioner, which is applied to the air conditioner comprising at least one indoor unit, an outdoor unit, a compressor, an air outlet temperature sensor, a liquid pipe coil temperature sensor, an air pipe coil temperature sensor and a controller, and as shown in fig. 2, the method comprises the following specific steps:
s201, determining a first revision value based on the air outlet temperature of the indoor unit and determining a second revision value based on the air outlet temperature and the number of outdoor units.
In this step, the first revision value is determined according to the air outlet temperature of the indoor unit, and the second revision value is determined based on the air outlet temperature and the number of outdoor units, where in general, the first revision value decreases with an increase in the air outlet temperature, and the second revision value also decreases with an increase in the air outlet temperature.
In order to further avoid the problem of water blowing caused by condensation inside the indoor unit, in some embodiments, the first revision value is determined based on the air outlet temperature and the second revision value is determined based on the air outlet temperature and the number of matches of the outdoor unit, specifically:
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value;
when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is larger than the first revision value.
Specifically, the first preset number of matches may be set according to needs, and the embodiment is not limited to a specific value of the first preset number of matches, where the first preset number of matches is only used to reflect whether the refrigeration superheat degree of the outdoor unit is higher, that is, whether the difference between the air pipe coil temperature and the liquid pipe coil temperature is higher, when the number of matches of the outdoor unit is smaller than the first preset number of matches, which indicates that the capacity of the outdoor unit is smaller at this time, the refrigeration superheat degree is not higher, at this time, no indoor unit refrigerant split-flow is generally generated, so that the second revision value is equal to the first revision value, so that the refrigeration superheat degree obtained by revision is not changed, and when the number of matches of the outdoor unit is not smaller than the first preset number, the refrigeration superheat degree of the outdoor unit is higher at this time, and the indoor unit refrigerant split-flow is easy to appear, so that the second revision value is smaller than the first value, so that the refrigeration superheat degree obtained by revision is reduced, and the opening of the electronic expansion valve is not excessively adjusted.
It should be noted that the above solution of the preferred embodiment is only one specific implementation scheme provided in the present application, and other methods for determining the first revision value based on the air outlet temperature and determining the second revision value based on the air outlet temperature and the number of outdoor units are all within the protection scope of the present application.
S202, when the air conditioner is in a first preset condition, determining the liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature of the indoor unit and the first revision value, and determining the air pipe coil revision temperature according to the difference between the air pipe coil temperature of the indoor unit and the second revision value.
In this step, when the air conditioner is in a first preset condition, determining the liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature and the first revision value, and determining the air pipe coil revision temperature according to the difference between the air pipe coil temperature and the second revision value, where the first preset condition is that the air conditioner is in a refrigeration or dehumidification mode, the low pressure of the air conditioner is less than a preset pressure, the air conditioner is not in a high-wind operation mode, and the air outlet temperature is not greater than a preset temperature.
S203, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
In this step, because the condensation water blowing phenomenon of the indoor unit is easy to occur when the air conditioner is in the first preset condition, the liquid pipe coil temperature is revised by the first revision value and the air pipe coil temperature is revised by the second revision value, the liquid pipe coil revision temperature and the air pipe coil revision temperature are respectively obtained, and then the operation of the air conditioner is controlled by the liquid pipe coil revision temperature and the air pipe coil revision temperature.
To accurately control an air conditioner based on a revised temperature, in some embodiments, the air conditioner is controlled based on the liquid and gas pipe coil revised temperatures, specifically:
and controlling the frequency of the compressor based on the liquid pipe coil revision temperature and controlling the opening degree of an electronic expansion valve of the indoor unit based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
Specifically, when the air conditioner is in a first preset condition, after the liquid pipe coil revision temperature and the air pipe coil revision temperature are determined, the frequency of the compressor is controlled based on the liquid pipe coil revision temperature, so that the air outlet temperature of the indoor unit is improved by reducing the frequency of the compressor, and meanwhile, the opening of the electronic expansion valve of the indoor unit is controlled based on the liquid pipe coil revision temperature and the air pipe coil revision temperature, so that the situation that the opening of the electronic expansion valve is excessively closed due to the excessively high superheat degree of an outdoor unit refrigerant is avoided, and uneven refrigerant distribution of the indoor unit caused by less refrigerant flow of the indoor unit is further avoided.
It should be noted that the solution of the above preferred embodiment is only one specific implementation proposed in the present application, and other methods for controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature are all within the scope of protection of the present application.
To further improve the air conditioner condensation water blowing phenomenon, in some embodiments, the method further comprises:
when the total working number of each indoor unit is larger than a second preset number, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the working total number of each indoor unit is not greater than the second preset number and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
Specifically, considering the total number of indoor units, when the total number of indoor units is not greater than the second preset number and the air conditioner is under the first preset condition, the compressor of the outdoor unit is excessively output due to overlarge discharge capacity, so that the phenomenon of condensation and water blowing caused by excessively low air outlet temperature of the indoor unit is easily caused, and the air conditioner is controlled based on the revision temperature of the liquid pipe coil and the revision temperature of the air pipe coil at the moment; when the total working number of each indoor unit is larger than the second preset number, the second preset number can be obtained through experiments, at the moment, the compressor of the outdoor unit cannot be excessively output, condensation water blowing phenomenon cannot easily occur, and meanwhile, in order to save energy, the air conditioner is controlled based on the actually detected liquid pipe coil temperature and air pipe coil temperature.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. An air conditioner, comprising:
at least one indoor unit including an indoor heat exchanger operating as a condenser or an evaporator;
the outdoor unit comprises a compressor, wherein the compressor is used for compressing low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser;
the air outlet temperature sensor is used for detecting the air outlet temperature of the indoor unit;
the liquid pipe coil temperature sensor is used for detecting the temperature of the liquid pipe coil of the indoor unit;
the air pipe coil temperature sensor is used for detecting the temperature of the air pipe coil of the indoor unit;
a controller configured to:
determining a first revision value based on the air outlet temperature and determining a second revision value based on the air outlet temperature and the number of outdoor units;
when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature and the first revision value and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature and the second revision value;
controlling the air conditioner based on the liquid coil revision temperature and the air coil revision temperature;
the first preset condition is that the air conditioner is in a refrigeration or dehumidification mode, the low-pressure of the air conditioner is smaller than a preset pressure, the air conditioner is not in a high-wind running mode, and the air outlet temperature is not greater than a preset temperature;
wherein, the first revision value is reduced along with the increase of the air outlet temperature, and the second revision value is also reduced along with the increase of the air outlet temperature;
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value; when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is smaller than the first revision value.
2. The air conditioner of claim 1, wherein the controller is specifically configured to:
controlling the frequency of the compressor based on the liquid pipe coil revision temperature and controlling the opening of an electronic expansion valve of the indoor unit based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
3. The air conditioner of claim 1, wherein the controller is configured to:
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value;
when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is smaller than the first revision value.
4. The air conditioner of claim 1, wherein the controller is configured to:
when the total working number of each indoor unit is larger than a second preset number, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the working total number of each indoor unit is not greater than the second preset number and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
5. The air conditioner of claim 1, wherein the controller is configured to:
when the starting time of the air conditioner is smaller than a preset time, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the starting time of the air conditioner is not less than the preset time and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
6. The air conditioner of claim 1, wherein the controller is configured to:
and when the air conditioner is not in the first preset condition, controlling the air conditioner based on the liquid pipe coil temperature and the air pipe coil temperature.
7. The control method for improving condensation and blowing water of the air conditioner is characterized by being applied to the air conditioner comprising at least one indoor unit, an outdoor unit, a compressor, an air outlet temperature sensor, a liquid pipe coil temperature sensor, an air pipe coil temperature sensor and a controller, and comprises the following steps:
determining a first revision value based on the air outlet temperature of the indoor unit and determining a second revision value based on the air outlet temperature and the number of outdoor units;
when the air conditioner is in a first preset condition, determining a liquid pipe coil revision temperature according to the difference between the liquid pipe coil temperature of the indoor unit and the first revision value, and determining a gas pipe coil revision temperature according to the difference between the gas pipe coil temperature of the indoor unit and the second revision value;
controlling the air conditioner based on the liquid coil revision temperature and the air coil revision temperature;
the first preset condition is that the air conditioner is in a refrigeration or dehumidification mode, the low-pressure of the air conditioner is smaller than a preset pressure, the air conditioner is not in a high-wind running mode, and the air outlet temperature is not greater than a preset temperature;
wherein, the first revision value is reduced along with the increase of the air outlet temperature, and the second revision value is also reduced along with the increase of the air outlet temperature;
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value; when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is smaller than the first revision value.
8. The control method of claim 7, wherein the air conditioner is controlled based on the liquid and gas coil revision temperatures, in particular:
controlling the frequency of the compressor based on the liquid pipe coil revision temperature and controlling the opening of an electronic expansion valve of the indoor unit based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
9. The control method of claim 7, wherein the first revised value is determined based on the outlet air temperature and the second revised value is determined based on the outlet air temperature and the number of outdoor units, specifically:
when the number of the outdoor units is smaller than a first preset number, the second revision value is equal to the first revision value;
when the number of the outdoor units is not smaller than the first preset number of the outdoor units, the second revision value is smaller than the first revision value.
10. The control method according to claim 7, characterized in that the method further comprises:
when the total working number of each indoor unit is larger than a second preset number, controlling the air conditioner based on the temperature of the liquid pipe coil and the temperature of the air pipe coil;
and when the working total number of each indoor unit is not greater than the second preset number and the air conditioner is in the first preset condition, controlling the air conditioner based on the liquid pipe coil revision temperature and the air pipe coil revision temperature.
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