CN114719394B - Control method of air conditioner - Google Patents

Control method of air conditioner Download PDF

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Publication number
CN114719394B
CN114719394B CN202210494064.6A CN202210494064A CN114719394B CN 114719394 B CN114719394 B CN 114719394B CN 202210494064 A CN202210494064 A CN 202210494064A CN 114719394 B CN114719394 B CN 114719394B
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China
Prior art keywords
temperature
target
exhaust
current
control method
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CN202210494064.6A
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Chinese (zh)
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CN114719394A (en
Inventor
汤奇雄
黎辉玲
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GD Midea Air Conditioning Equipment Co Ltd
Foshan Shunde Midea Electric Science and Technology Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment Co Ltd
Foshan Shunde Midea Electric Science and Technology Co Ltd
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Application filed by GD Midea Air Conditioning Equipment Co Ltd, Foshan Shunde Midea Electric Science and Technology Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202210494064.6A priority Critical patent/CN114719394B/en
Publication of CN114719394A publication Critical patent/CN114719394A/en
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Classifications

    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • 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
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • F24F2110/10—Temperature
    • 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
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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

Abstract

The application provides a control method of an air conditioner, the air conditioner comprises a compressor, an evaporator, at least two condensers, at least two throttling parts and at least two condensing branches, wherein the compressor is provided with an air suction port and two exhaust ports with different pressures; one of the condensation branches is communicated with one of the exhaust ports and the inlet of the evaporator, the other condensation branch is communicated with the other exhaust port and the inlet of the evaporator, and each condensation branch is connected with a condenser and a throttling component in series; the control method comprises the following steps: acquiring the current exhaust temperature and the target exhaust temperature of each exhaust port; and adjusting the opening degree of the corresponding throttling component according to the current exhaust temperature and the target exhaust temperature of each exhaust port. According to the control method, the valve core opening of each throttling component is independently controlled, and the condensation temperature of the condenser is matched with the heat exchange of the external heat exchange fluid by adjusting the opening of the throttling component, so that the refrigerating capacity of the compressor is improved, and the power consumption is reduced.

Description

Control method of air conditioner
Technical Field
The present disclosure relates to the field of air conditioning technologies, and in particular, to a control method of an air conditioner.
Background
Taking a kitchen and bathroom air conditioner as an example, the kitchen and bathroom air conditioner generally adopts a wall to punch holes or uses tap water to condense a condenser, is limited by the punching size and the limitation of tap water flow, has higher condensing temperature of the refrigerant, reduces the refrigerating capacity and has larger power consumption of a compressor.
Disclosure of Invention
In view of this, it is desirable to provide a control method of an air conditioner that increases the cooling capacity of a compressor and reduces power consumption.
The embodiment of the application provides a control method of an air conditioner,
the air conditioner includes:
a compressor having an intake port, and two exhaust ports of different pressures;
an evaporator;
at least two condensers and at least two throttling components;
at least two condensing branches, wherein one condensing branch is communicated with one exhaust port and an inlet of the evaporator, the other condensing branch is communicated with the other exhaust port and an inlet of the evaporator, and a condenser and a throttling component are connected in series on each condensing branch;
the control method comprises the following steps:
acquiring the current exhaust temperature and the target exhaust temperature of each exhaust port;
and adjusting the opening degree of the corresponding throttling component according to the current exhaust temperature and the target exhaust temperature of each exhaust port.
In some embodiments, said adjusting the opening of the corresponding throttle member according to the current exhaust temperature and the target exhaust temperature of each exhaust port includes:
acquiring the current opening of each throttling component;
a first temperature difference between the current exhaust temperature and the target exhaust temperature is calculated,
calculating to obtain a target opening of the throttling component according to the first temperature difference and the current opening;
and adjusting the opening of the throttling component to the target opening.
In some embodiments, the calculating the target opening of the throttle component according to the first temperature difference and the current opening includes:
determining a target constant in a first preset relational expression according to the first temperature difference;
and calculating the target opening according to the current opening, the first preset relation and the target constant thereof.
In some embodiments, in the first preset relation, the target opening degree is in a linear proportional relation with the current opening degree.
In some embodiments, said adjusting the opening of the corresponding throttle member according to the current exhaust temperature and the target exhaust temperature of each exhaust port includes:
obtaining the current operating frequency of the compressor, the target operating frequency under the current working condition, the evaporating temperature of the evaporator and the condensing temperature of the condenser,
calculating a first temperature difference between the current exhaust temperature and the target exhaust temperature;
calculating a corresponding target opening of the throttling component according to the first temperature difference, the current operating frequency, the target operating frequency, the evaporation temperature and the condensation temperature;
and adjusting the opening of the throttling component to the target opening.
In some embodiments, the calculating the target opening of the corresponding throttle component according to the first temperature difference, the current operating frequency, the target operating frequency, the evaporating temperature, and the condensing temperature includes:
determining a target constant in a second preset relational expression according to the first temperature difference;
and calculating the corresponding target opening of the throttling component according to the second preset relation and the target constant thereof, the current running frequency, the target running frequency, the evaporation temperature and the condensation temperature.
In some embodiments, in the second preset relation, the difference between the target operating frequency and the current operating frequency, the evaporating temperature, and the condensing temperature are all in a linear proportional relationship with the target opening degree.
In some embodiments, the obtaining the target exhaust temperature comprises:
acquiring target operating frequency and outdoor temperature of the compressor under the current working condition;
and calculating the target exhaust temperature of each exhaust port according to the target operating frequency and the outdoor temperature.
In some embodiments, the obtaining the target operating frequency of the compressor under the current working condition includes:
acquiring an indoor return air temperature and an indoor set temperature of the air conditioner in a current working mode;
calculating a second temperature difference between the indoor return air temperature and the indoor set temperature;
and calculating the target operating frequency according to the second temperature difference.
In some embodiments, the calculating the target exhaust temperature for each exhaust port based on the target operating frequency and the outdoor temperature includes:
determining a target constant in a third preset relation according to the outdoor temperature;
and calculating the target exhaust temperature according to the third preset relation and the target constant of the third preset relation.
In some embodiments, in a third predetermined relationship, the target operating frequency is linearly proportional to the target exhaust temperature.
In some embodiments, the obtaining the target exhaust temperature comprises:
acquiring an outdoor temperature, an evaporation temperature of the evaporator and a condensation temperature of the condenser;
and calculating the target exhaust temperature according to the outdoor temperature, the evaporation temperature and the condensation temperature.
In some embodiments, the calculating the target discharge temperature based on the outdoor temperature, the evaporating temperature, and the condensing temperature includes:
determining a target constant in a fourth preset relation according to the outdoor temperature;
and calculating the target exhaust temperature according to the fourth preset relation and the target constant, the evaporation temperature and the condensation temperature thereof.
In some embodiments, in the fourth preset relationship, the evaporation temperature and the condensation temperature are both linearly proportional to the target exhaust temperature.
According to the control method, the valve core opening of each throttling component is independently controlled, and the condensing temperature of the condenser is further adjusted by adjusting the opening of the throttling component, so that the condensing temperature of the condenser is matched with external heat exchange fluid in a heat exchange mode, and the heat exchange is reducedAnd the loss is improved, the refrigerating capacity of the compressor is improved, and the power consumption is reduced.
Drawings
FIG. 1 is a schematic diagram of an air conditioner according to an embodiment of the present application;
FIG. 2 is a schematic view of an air conditioner according to another embodiment of the present application;
FIG. 3 is a flow chart of a control method according to an embodiment of the present disclosure;
FIG. 4 is a flowchart illustrating one embodiment of the step S2 in FIG. 3;
FIG. 5 is a flowchart illustrating another embodiment of the step S2 in FIG. 3;
FIG. 6 is a flow chart illustrating one embodiment of the step S1 in FIG. 3;
fig. 7 is a flowchart of another embodiment of step S1 in fig. 3.
Description of the reference numerals
A compressor 1; an air inlet 1a; a first exhaust port 1b; a second exhaust port 1c;
a first condenser 21; a second condenser 22; a third condenser 23;
an evaporator 31;
a first throttle member 41; a second throttle member 42;
a first condensation branch 5A; a second condensation branch 5B;
a housing 100; a heat dissipation channel 100a; outdoor air intake 100b; outdoor air 100c; indoor return air inlet 100d;
an indoor air supply port 100e; a blower passage 100f; installation space 100g
Detailed Description
Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the present application but are not intended to limit the scope of the present application.
In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on those shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying 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 thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The embodiment of the application provides a control method of an air conditioner.
Before describing the control method, the air conditioner of the embodiment of the present application will be described.
Referring to fig. 1 and 2, the air conditioner includes a compressor 1, an evaporator 31, at least two condensers and at least two throttle members, at least two condensing branches.
The refrigerant in the refrigeration system may be an azeotropic refrigerant or a non-azeotropic refrigerant, and is not limited herein. The type of refrigerant is not limited.
The compressor 1 has an intake port 1a, and two discharge ports of different pressures. The compressor 11 is a single suction, double discharge compressor, wherein the discharge pressure of one discharge port is greater than the discharge pressure of the other discharge port.
For convenience of description, one exhaust port having a lower exhaust pressure will be referred to as a first exhaust port 1b, and one exhaust port having a higher exhaust pressure will be referred to as a second exhaust port 1c. That is, the exhaust pressure of the first exhaust port 1b1b is lower than that of the second exhaust port 1c1c, and it is understood that the exhaust temperature of the first exhaust port 1b1b is also lower than that of the second exhaust port 1c 1c.
One of the condensation branches is communicated with one of the exhaust ports and the inlet of the evaporator 31, the other condensation branch is communicated with the other exhaust port and the inlet of the evaporator 31, and a condenser and a throttling component are connected in series on each condensation branch.
For convenience of description, the condensing branch communicating with the first exhaust port 1B is referred to as a first condensing branch 5A, and the condensing branch communicating with the second exhaust port 1c is referred to as a second condensing branch 5B.
The first condenser in the direction of the flow of the refrigerant in the first condensation branch 5A is denoted as first condenser 21, and the throttle member in the first condensation branch 5A is denoted as first throttle member 41.
The first condenser in the direction of flow of the refrigerant in the second condensation branch 5B is denoted as second condenser 22, and the throttling element in the second condensation branch 5B is denoted as second throttling element 42.
It should be noted that the number of condensers in the first condensation branch 5A may be one or plural, and is not limited herein.
The number of condensers in the second condensation branch 5B may be one or more.
For example, in some embodiments, referring to fig. 1, the number of condensers on the second condensing branch 5B is one, i.e., the second condenser 22.
In other embodiments, referring to fig. 2, the number of the condensers on the second condensation branch 5B is two, denoted as a second condenser 22 and a third condenser 23, the third condenser 23 is located downstream of the second condenser 22, and the refrigerant flows through the second condenser 22 and then flows through the third condenser 23, so that the third condenser 23 can obtain a larger supercooling degree of the refrigerant, and the refrigerating capacity is improved.
The application of the air conditioner is not limited, and for example, the air conditioner can be used in a kitchen, a bathroom and the like.
Illustratively, in the air conditioner of the embodiment of the present application, there is no four-way valve, and the refrigerant discharged from the compressor 1 flows through the condenser first and then through the evaporator 31, that is, the functions of the condenser and the evaporator 31 are determined and not interchanged.
As an example, with continued reference to fig. 1 and 2, the air conditioner includes a housing 100, the housing 100 having a heat dissipation channel 100a, an outdoor air intake 100b and an outdoor air outlet 100c, and the heat dissipation channel 100a communicates with the outdoor air intake 100b and the outdoor air outlet 100c. Each condenser is disposed in the heat dissipation channel 100a, air in the external environment enters the heat dissipation channel 100a through the outdoor air inlet 100b, and the air flows through the outer surface of each condenser and is discharged to the external environment from the outdoor air outlet 100c.
The first condenser 21 is located on the air intake side of the second condenser 22, and air flows through the first condenser 21 and then through the second condenser 22. Since the temperature of the outer surface of the first condenser 21 is lower than that of the outer surface of the second condenser 22, the cascade utilization of the energy of the air can be achieved in this embodiment.
It will be appreciated that referring to fig. 2, in the embodiment in which the air conditioner includes the third condenser 23, the first condenser 21, and the second condenser 22 are sequentially arranged along the flow direction of the wind in the heat dissipation path 100 a.
For example, referring to fig. 1 and 2, the housing 100 includes an installation space 100g, an air supply channel 100f, an indoor return air inlet 100d and an indoor air supply opening 100e, the air supply channel 100f communicates the indoor return air inlet 100d and the indoor air supply opening 100e, and the evaporator 31 is disposed in the air supply channel 100 f. The indoor air enters the air duct 100f through the indoor return air inlet 100d, exchanges heat with the evaporator 31 in the air duct 100f, and is discharged into the room through the indoor air outlet 100 e.
The air conditioner is an integrated machine, and the components such as the compressor 1 are all installed in the installation space 100 g.
It will be appreciated that in the present embodiment, the refrigerant throttled by the first throttling member 41 and the second throttling member 42 enters the same evaporator 31 to obtain the same evaporation temperature.
According to the air conditioner, the single-suction double-exhaust compressor is adopted, two different-pressure refrigerants are independently exhausted, two different condensing pressures are obtained, external heat exchange fluid (air or tap water) sequentially flows through the first condenser 21 and the second condenser 22, energy cascade utilization of the heat exchange fluid can be achieved, and heat exchange is reducedThe loss reduces the condensing pressure of the first condenser 21, improves the refrigerating capacity of the compressor 1, reduces the power consumption, and provides the economical efficiency of the operation of the air conditioner.
Referring to fig. 3, the control method includes the following steps:
s1: the current exhaust temperature and the target exhaust temperature of the two exhaust ports are obtained.
The current exhaust temperature Td1 of the first exhaust port, the target exhaust temperature of the first exhaust port is Tds1.
The current exhaust temperature Td2 of the second exhaust port, the target exhaust temperature of the second exhaust port is Tds2.
S2: and adjusting the opening degree of the corresponding throttling component according to the current exhaust temperature and the target exhaust temperature of each exhaust port.
Specifically, the opening degree of the first throttle member is adjusted in accordance with the current exhaust temperature Td1 of the first exhaust port and the target exhaust temperature Tds1.
The opening degree of the second throttle member is adjusted in accordance with the current exhaust temperature Td2 of the second exhaust port and the target exhaust temperature Tds2.
According to the control method, the valve core opening of each throttling component is independently controlled, and the condensing temperature of the condenser is further adjusted by adjusting the opening of the throttling component, so that the condensing temperature of the condenser is matched with external heat exchange fluid in a heat exchange mode, and the heat exchange is reducedAnd the loss is improved, the refrigerating capacity of the compressor is improved, and the power consumption is reduced.
For example, referring to fig. 4, adjusting the opening of the corresponding throttle component according to the current exhaust temperature and the target exhaust temperature of each exhaust port, i.e. step S2, may include:
s21: the current opening degree of each throttle member is acquired.
The current opening degree of the first throttle member is OP1, and the current opening degree of the second throttle member is OP2.
For example, the valve spool position of the throttle member may be detected to obtain the current opening degree of the throttle member.
S22: a first temperature difference between the current exhaust temperature and the target exhaust temperature is calculated.
The first temperature difference of the first throttle member is Δtdds1, Δtdds1=tds1-Tds 1.
The first temperature difference of the second throttle member is Δtdds2, Δtdds2=tdd2-Tds 2.
S23: and calculating the target opening of the throttling component according to the first temperature difference and the current opening.
Specifically, the target opening degree OPs1 of the first throttle member is calculated from the first temperature difference Δtdds1 of the first throttle member and the current opening degree OP 1.
The target opening OPs2 of the second throttle member is calculated from the first temperature difference Δtdds2 of the second throttle member and the current opening OP2.
S24: the opening degree of the throttle member is adjusted to a target opening degree.
Specifically, the opening degree of the first throttle member is adjusted to the target opening degree OPs1.
The opening degree of the second throttle member is adjusted to a target opening degree OPs2.
In this embodiment, the opening degree of the corresponding throttling component is independently controlled according to the first temperature difference between the current exhaust temperature of each exhaust port and the target exhaust temperature, and the exhaust temperature of the exhaust port is adjusted by adjusting the opening degree of the throttling component, so that the current exhaust temperature is as close to the target exhaust temperature as possible, and the running economy of the air conditioner is improved.
For example, in some embodiments, the calculating the target opening of the throttle member according to the first temperature difference and the current opening, that is, the step S23 may include:
s231: determining a target constant in a first preset relational expression according to the first temperature difference;
s232: and calculating the target opening according to the current opening, the first preset relation and the target constant of the first preset relation.
The first preset relation may be pre-stored in the database, and the first preset relation may be regarded as a functional relation between a target opening and a current opening. And (5) taking the target constant into a first preset relational expression, and calculating the target opening.
The specific functional expression of the first preset relation is not limited.
Illustratively, in the first preset relation, the target opening degree is in a linear proportional relation with the current opening degree.
For example, in some embodiments, the target opening ops1=op1×mi of the first throttle member, and ops2=op2×ni of the second throttle member. Where mi and ni are both target constants associated with the first temperature difference.
In other embodiments, the target opening ops1=op1+mi+d of the first throttling element, ops2=op2×ni+h of the second throttling element. Wherein mi, d, ni, h are all target constants associated with the first temperature difference.
Note that, for the first throttle member, the value interval of the first temperature difference is different, and mi is different.
For the second throttling component, ni is different in the value interval of the first different temperature difference.
The mi corresponding to the first throttle member is related to only the first temperature difference corresponding to the first throttle member, and is not related to the first temperature difference corresponding to the second throttle member. Similarly, ni corresponding to the second throttling element is related only to the first temperature difference corresponding to the second throttling element, and is unrelated to the first temperature difference corresponding to the first throttling element. That is, even if at some point in time the first temperature difference corresponding to the first throttle member and the first temperature difference corresponding to the second throttle member are the same, mi and ni may be the same or may be different.
Taking ops1=op1×mi and ps2=op2×ni as an example, a plurality of arrays [ Δt11 to Δt12, m1], [ Δt12 to Δt13, m2] … are preset and stored in the database, wherein the numerical range does not include an upper limit endpoint value. When Δtdds1 falls within Δt11 to Δt12 (excluding Δt12), mi takes on the value of m1. When Δtdds2 falls within Δt12 to Δt13 (excluding Δt13), mi takes on the value m2, and so on.
Similarly, a plurality of arrays [ delta T21-delta T22, n1], [ delta T22-delta T23, n2] … are preset and stored in the database, wherein the numerical range does not comprise an upper limit endpoint. When Δtdds2 falls within Δt21 to Δt22 (excluding Δt22), ni takes the value of n1. When Δtdds2 falls within Δt22 to Δt23 (excluding Δt23), ni takes on the value n2, and so on.
It should be understood that the first preset relation may be fitted according to experimental data or derived according to empirical data, which is not limited herein.
Exemplary, in other embodiments, referring to fig. 5, according to the current exhaust temperature and the target exhaust temperature of each exhaust port, the opening degree of the corresponding throttle component is adjusted, that is, step S2 includes:
s25: the method comprises the steps of obtaining the current operating frequency F of a compressor, the target operating frequency Fs under the current working condition, the evaporating temperature of an evaporator and the condensing temperature of a condenser. In the embodiment of the application, the compressor is a variable frequency compressor, and the operation frequency of the compressor changes according to working conditions.
S26: a first temperature difference between the current exhaust temperature and the target exhaust temperature is calculated.
S27: and calculating the target opening of the corresponding throttling component according to the first temperature difference, the current operating frequency, the target operating frequency, the evaporation temperature and the condensation temperature.
S28: the opening degree of the throttle member is adjusted to a target opening degree.
In this embodiment, the target opening degree of the throttle member is correlated with the first temperature difference, the current operating frequency, the target operating frequency, the evaporation temperature, the condensation temperature, and the target opening degree is determined by a plurality of parameters together.
It should be noted that, since the first condensation branch and the second condensation branch share one evaporator, the evaporation temperatures corresponding to the two exhaust ports are the same.
For example, the calculating the target opening of the corresponding throttle component according to the first temperature difference, the current operating frequency, the target operating frequency, the evaporation temperature, and the condensation temperature, that is, step S27 may include:
s271: determining a target constant in a second preset relational expression according to the first temperature difference;
s272: and calculating the target opening of the corresponding throttling component according to the second preset relation and the target constant, the current operating frequency, the target operating frequency, the evaporation temperature and the condensation temperature thereof.
The second preset relation may be pre-stored in the database, and the second preset relation may be considered as a functional relation between the target opening and the current operating frequency, the target operating frequency, the evaporating temperature, and the condensing temperature. And (5) taking the target constant into a second preset relational expression, and calculating the target opening.
Specifically, ops1=f (F, fs, te, tc 1), ops2=f (F, fs, te, tc 2), where F represents a functional relation. F is the current operating frequency of the compressor, fs is the target operating frequency of the compressor, te is the evaporating temperature of the evaporator, tc1 is the condensing temperature of the first condenser, and Tc2 is the condensing temperature of the second condenser.
The specific functional expression of the second preset relation is not limited.
Illustratively, in the second preset relation, the difference between the target operating frequency and the current operating frequency, the evaporation temperature, and the condensation temperature are all in linear proportion to the target opening degree.
The second preset relation may be fitted according to experimental data, or may be derived according to empirical data, which is not limited herein.
For example, ops1=ui (Fs-F) +vi+te+wi+tc1+zi. Where Ui, vi, wi, zi is a target constant associated with the first temperature differential of the first exhaust port and Fs-F is the difference between the target operating frequency and the current operating frequency.
Ops2=li (Fs-F) +mi+te+xi+tc2+yi. Wherein Li, mi, xi, yi is a target constant related to the first temperature differential of the second exhaust port.
Note that, for the first throttle member, the value intervals of the different first temperature differences Ui, vi, wi, zi are not exactly the same.
For the second throttling component, the value intervals of the first different temperature differences are not completely the same as Li, mi, xi, yi.
For example, a plurality of arrays [ Δt11 to Δt12, U1, V1, W1, Z1], [ Δt12 to Δt13, U2, V2, W2, Z2] … are preset and stored in the database. When Δtdds1 falls within Δt11 to Δt12 (excluding Δt12), ui, vi, wi, zi takes values of U1, V1, W1, and Z1, respectively. When Δtdds2 falls within Δt12 to Δt13 (excluding Δt13), ui, vi, wi, zi takes values of U2, V2, W2, Z2, and so on, respectively.
Similarly, a plurality of arrays [ delta T21-delta T22, L1, M1, X1, Y1], [ delta T22-delta T23, L2, M2, X2, Y2] … are preset and stored in the database, wherein the numerical range does not comprise an upper limit endpoint value. When Δtdds2 falls within Δt21 to Δt22 (excluding Δt22), li, mi, xi, yi takes values of L1, M1, X1, and Y1, respectively. When Δtdds2 falls within Δt22 to Δt23 (excluding Δt23), li, mi, xi, yi takes values of L2, M2, X2, Y2, and so on, respectively.
For example, referring to fig. 6, the step S1 of obtaining the target exhaust temperature may include:
s11: the target operating frequency Fs of the compressor under the current working condition and the outdoor temperature To are obtained.
The outdoor temperature may be obtained by a temperature detecting device, or may be obtained from the internet to obtain a local current air temperature, which is not limited herein.
S12: the target exhaust temperature of each exhaust port is calculated based on the target operating frequency Fs and the outdoor temperature To.
In this embodiment, since it is necessary to introduce the outdoor air to cool down the respective condensers, the condensing temperature of the condensers is related to the temperature of the outdoor air and also to the target operating frequency.
For example, the obtaining the target operating frequency of the compressor under the current working condition, i.e. step S11, may include:
s111: and acquiring the indoor return air temperature Ti and the indoor set temperature Ts of the air conditioner in the current working mode.
The indoor return air temperature Ti refers to the temperature of the air flow entering the air supply duct 100f, and for example, a temperature detecting device may be installed at the indoor return air inlet 100d, and the indoor return air temperature Ti may be detected by the temperature detecting device.
The indoor set temperature Ts refers to a temperature set by a user and desired to be reached, for example, a temperature set by a user through a remote controller or a manipulation key of a surface of the housing.
S112: and calculating a second temperature difference delta Tis between the indoor return air temperature and the indoor set temperature.
That is, Δtis=ti—ts.
S113: and calculating the target operating frequency Fs according to the second temperature difference delta Tis.
In this embodiment, the target operating frequency Fs is associated with the second temperature difference Δtis, providing another possible way to calculate the target operating frequency Fs.
The specific algorithm for calculating the target operating frequency Fs according to the second temperature difference is not limited, and may be obtained according to a fuzzy algorithm in the prior art, and will not be described herein.
Illustratively, the calculating the target exhaust temperature of each exhaust port according to the target operating frequency and the outdoor temperature, i.e. step S12, includes:
s121: and determining a target constant in a third preset relation according to the outdoor temperature.
S122: and calculating the target exhaust temperature according to a third preset relation and a target constant of the third preset relation.
The third predetermined relationship may be pre-stored in the database and may be considered a functional relationship between the target operating frequency and the target exhaust temperature. And (5) taking the target constant into a third preset relation, and calculating the target exhaust temperature.
For example, in the third preset relationship, the target operating frequency is linearly proportional to the target exhaust temperature.
For example, tds1=ai, fs+bi, where ai, bi are target constants related To the outdoor temperature To.
Tds2=ci, fs+di. Where ci, di are target constants related To the outdoor temperature To.
For example, a plurality of arrays [ To1 To2, a1, b1], [ To2 To3, a2, b2] … are preset and stored in the database, wherein the numerical range does not include an upper limit endpoint. When To falls within To1 To To2 (excluding To 2), ai and bi take on values of a1 and b1. When To falls into To 2-To 3 (excluding To 3), ai and bi take on values of a2 and b2, and so on.
Similarly, a plurality of arrays [ To1 To2, c1, d1], [ To2 To3, c2, d2] … are preset and stored in the database, wherein the numerical range does not comprise an upper limit endpoint value. When To falls within To1 To To2 (excluding To 2), ci and di take values of c1 and d1. When To falls into To 2-To 3 (excluding To 3), ci and di take values of c2 and d2, and so on.
It will be appreciated that the target exhaust temperature may also be obtained by another method.
For example, referring to fig. 7, the step S1 of obtaining the target exhaust temperature may include:
s13: acquiring an outdoor temperature, an evaporation temperature of an evaporator and a condensation temperature of a condenser;
s14: and calculating the target exhaust temperature according to the outdoor temperature, the evaporation temperature and the condensation temperature.
In this embodiment, the target discharge temperature is correlated with the evaporation temperature, the condensation temperature, and the outdoor temperature, providing another possible way to calculate the target discharge temperature.
For example, the calculating the target exhaust temperature according to the outdoor temperature, the evaporating temperature and the condensing temperature, i.e. step S14, may include:
s141: the target constant in the fourth preset relation is determined according To the outdoor temperature To.
S142: and calculating the target exhaust temperature according to the fourth preset relation and the target constant, the evaporation temperature and the condensation temperature thereof.
The fourth predetermined relationship may be pre-stored in the database and may be considered as a function of the target exhaust temperature and the evaporating and condensing temperatures. And (5) taking the target constant into a fourth preset relational expression, and calculating the target exhaust temperature.
The specific function expression of the fourth preset relational expression is not limited.
For example, in the fourth preset relationship, the evaporation temperature and the condensation temperature are both linearly proportional to the target exhaust gas temperature.
For example, tds1=ei+fi+tc1+gi, where Ei, fi, gi are all target constants related to the outdoor temperature, tds1 is the target discharge temperature of the first discharge port, te is the evaporation temperature of the evaporator, and Tc1 is the condensation temperature of the first condenser.
Tds2=hi+te+ji+tc2+ki, where Hi, ji, ki are target constants related to the outdoor temperature, tds2 is the target discharge temperature of the second discharge port, te is the evaporation temperature of the evaporator, and Tc2 is the condensation temperature of the second condenser.
For example, a plurality of arrays [ To1 To2, E1, F1, G1], [ To2 To3, E2, F2, G2] … are preset and stored in the database, wherein the numerical range does not include the upper limit endpoint value. When To falls into To 1-To 2 (excluding To 2), ei, fi and Gi are E1, F1 and G1 respectively. When To falls into To 2-To 3 (excluding To 3), ei, fi and Gi are E2, F2 and G2 respectively, and so on.
Similarly, a plurality of arrays [ To1 To2, H1, J1, K1], [ To2 To3, H2, J2, K2] … are preset and stored in the database, wherein the numerical range does not comprise an upper limit endpoint value. When To falls into To 1-To 2 (excluding To 2), hi, ji and Ki are H1, J1 and K1 respectively. When To falls into To 2-To 3 (excluding To 3), hi, ji and Ki are H2, J2, K2 respectively, and so on.
In the description of the present application, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 embodiments of the present application. In this application, the schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples described herein, as well as the features of the various embodiments or examples, may be combined by those skilled in the art without contradiction.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (14)

1. A control method of an air conditioner is characterized in that,
the air conditioner includes:
a compressor having an intake port, and two exhaust ports of different pressures;
an evaporator;
at least two condensers and at least two throttling components;
at least two condensing branches, wherein one condensing branch is communicated with one exhaust port and an inlet of the evaporator, the other condensing branch is communicated with the other exhaust port and an inlet of the evaporator, and a condenser and a throttling component are connected in series on each condensing branch;
the air conditioner comprises a shell, wherein the shell is provided with a heat dissipation channel, an outdoor air inlet and an outdoor air outlet, the heat dissipation channel is communicated with the outdoor air inlet and the outdoor air outlet, each condenser is arranged in the heat dissipation channel, air in the external environment enters the heat dissipation channel through the outdoor air inlet, and the condensers are sequentially arranged along the flow direction of air flow in the heat dissipation channel;
the control method comprises the following steps:
acquiring the current exhaust temperature and the target exhaust temperature of each exhaust port;
and adjusting the opening degree of the corresponding throttling component according to the current exhaust temperature and the target exhaust temperature of each exhaust port.
2. The control method according to claim 1, wherein said adjusting the opening degree of the corresponding throttle member in accordance with the current exhaust temperature, the target exhaust temperature of each of the exhaust ports, comprises:
acquiring the current opening of each throttling component;
a first temperature difference between the current exhaust temperature and the target exhaust temperature is calculated,
calculating to obtain a target opening of the throttling component according to the first temperature difference and the current opening;
and adjusting the opening of the throttling component to the target opening.
3. The control method according to claim 2, wherein the calculating the target opening of the throttle member based on the first temperature difference and the current opening includes:
determining a target constant in a first preset relational expression according to the first temperature difference;
and calculating the target opening according to the current opening, the first preset relation and the target constant thereof.
4. A control method according to claim 3, wherein in the first preset relational expression, the target opening degree is in a linear proportional relationship with the current opening degree.
5. The control method according to claim 1, wherein said adjusting the opening degree of the corresponding throttle member in accordance with the current exhaust temperature, the target exhaust temperature of each of the exhaust ports, comprises:
obtaining the current operating frequency of the compressor, the target operating frequency under the current working condition, the evaporating temperature of the evaporator and the condensing temperature of the condenser,
calculating a first temperature difference between the current exhaust temperature and the target exhaust temperature;
calculating a corresponding target opening of the throttling component according to the first temperature difference, the current operating frequency, the target operating frequency, the evaporation temperature and the condensation temperature;
and adjusting the opening of the throttling component to the target opening.
6. The control method according to claim 5, wherein calculating the target opening degree of the corresponding throttle member based on the first temperature difference, the current operating frequency, the target operating frequency, the evaporating temperature, and the condensing temperature includes:
determining a target constant in a second preset relational expression according to the first temperature difference;
and obtaining the corresponding target opening degree of the throttling component according to the second preset relation and the target constant thereof, the current running frequency, the target running frequency, the evaporation temperature and the condensation temperature.
7. The control method according to claim 6, wherein in the second preset relational expression, a difference between the target operating frequency and the current operating frequency, the evaporation temperature, and the condensation temperature are all in a linear proportional relationship with the target opening degree.
8. The control method according to claim 1, characterized in that the obtaining the target exhaust gas temperature includes:
acquiring target operating frequency and outdoor temperature of the compressor under the current working condition;
and calculating the target exhaust temperature of each exhaust port according to the target operating frequency and the outdoor temperature.
9. The control method of claim 8, wherein said obtaining a target operating frequency of said compressor under a current operating condition comprises:
acquiring an indoor return air temperature and an indoor set temperature of the air conditioner in a current working mode;
calculating a second temperature difference between the indoor return air temperature and the indoor set temperature;
and calculating the target operating frequency according to the second temperature difference.
10. The control method according to claim 8, wherein said calculating a target discharge temperature for each of said discharge ports based on said target operating frequency and said outdoor temperature comprises:
determining a target constant in a third preset relation according to the outdoor temperature;
and calculating the target exhaust temperature according to the third preset relation and the target constant of the third preset relation.
11. The control method according to claim 10, characterized in that in a third preset relational expression, the target operating frequency is in a linear proportional relationship with the target exhaust gas temperature.
12. The control method according to claim 1, characterized in that the obtaining the target exhaust gas temperature includes:
acquiring an outdoor temperature, an evaporation temperature of the evaporator and a condensation temperature of the condenser;
and obtaining the target exhaust temperature according to the outdoor temperature, the evaporation temperature and the condensation temperature.
13. The control method according to claim 12, wherein the deriving the target exhaust gas temperature from the outdoor temperature, the evaporation temperature, and the condensation temperature includes:
determining a target constant in a fourth preset relation according to the outdoor temperature;
and calculating the target exhaust temperature according to the fourth preset relation and the target constant, the evaporation temperature and the condensation temperature thereof.
14. The control method according to claim 13, characterized in that in a fourth preset relational expression, the evaporation temperature and the condensation temperature are both in a linear proportional relationship with the target exhaust gas temperature.
CN202210494064.6A 2022-04-29 2022-04-29 Control method of air conditioner Active CN114719394B (en)

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