CN109269040B - Air conditioner control system and control method - Google Patents

Air conditioner control system and control method Download PDF

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Publication number
CN109269040B
CN109269040B CN201810910820.2A CN201810910820A CN109269040B CN 109269040 B CN109269040 B CN 109269040B CN 201810910820 A CN201810910820 A CN 201810910820A CN 109269040 B CN109269040 B CN 109269040B
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China
Prior art keywords
chassis
temperature
air conditioner
control valve
heating
Prior art date
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Application number
CN201810910820.2A
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Chinese (zh)
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CN109269040A (en
Inventor
梁伟波
熊硕
汪楠
胡保国
陈昭骏
张智光
赵欢欢
崔天伟
李康
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201810910820.2A priority Critical patent/CN109269040B/en
Publication of CN109269040A publication Critical patent/CN109269040A/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
    • F24F11/62—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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • 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
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Abstract

The invention provides an air conditioner control system and a control method, wherein the air conditioner control system comprises: compressor (1), indoor heat exchanger (2), outdoor heat exchanger (3), wherein the high pressure exhaust end (11) of compressor (1) with branch road (4) still branch off on the pipeline between indoor heat exchanger (2), be provided with chassis heating module (5) on branch road (4), can heat the air conditioner chassis, the other end of branch road (4) links back to the low pressure of compressor end (12) of breathing in. The invention can utilize the refrigerant to melt ice, fully utilize energy, improve energy efficiency, reduce power consumption, save energy, reduce emission and avoid the problem of reliability; the problem that ice on the chassis is difficult to melt under extremely cold conditions to cause friction between the fan blades and ice blocks can be solved, and the problems that an external machine in a severe cold region is high in operation noise and easy to cause mechanical faults are solved from the source.

Description

Air conditioner control system and control method
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to an air conditioner control system and a control method.
Background
At present, along with the higher and higher requirements on environmental protection, the heating mode in the low-temperature environment is gradually changed from coal heating to air-conditioning heating. However, at-15 ℃, the existing silica gel electric heating belt mode is limited by silica gel materials, and the electric heating power is low, so that the ice melting requirement of the chassis cannot be met. If a heating pipe deicing mode is adopted, the electric heating power can be increased to 300W, the requirement of chassis deicing at minus 15 ℃ can be met, but energy consumption waste and potential safety hazards caused by overheating exist for 0-minus 15 ℃ outdoors. If the coolant of the system is adopted to supply heat to the chassis so as to solve the problem of unsmooth drainage caused by icing of the chassis, the power consumption of the whole machine can be reduced, and the utilization rate of energy can be improved in an intelligent control mode.
Because the air conditioner in the prior art has the problems of severe chassis frosting or icing and unsmooth drainage, the energy consumption waste is large and the energy efficiency is low due to the adoption of electric heating defrosting or deicing; the invention relates to a control system and a control method of an air conditioner, which solves the problems that the comfort degree is influenced by the reduction of the indoor environment temperature during freezing or defrosting, and the technical problems that the energy efficiency value is low during freezing or defrosting and indoor heating, and the like.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that the air conditioner in the prior art has the defects of large energy consumption and low energy efficiency due to the fact that the chassis is frosted or iced seriously and the electric heating is adopted for defrosting or deicing, so that the air conditioner control system and the control method are provided.
The present invention provides an air conditioner control system, comprising:
a compressor, an indoor heat exchanger, an outdoor heat exchanger,
the air conditioner comprises a compressor, an indoor heat exchanger, a high-pressure exhaust end of the compressor, a chassis heating module, an air conditioner chassis, a low-pressure air suction end of the compressor, a high-pressure exhaust end of the compressor, a pipeline between the indoor heat exchanger and the high-pressure exhaust end of the compressor, and a branch circuit, wherein the chassis heating module is arranged on the branch circuit and can heat the air conditioner chassis, and the other end of the.
Preferably, the first and second electrodes are formed of a metal,
the indoor heat exchanger is characterized in that a first control valve is arranged on a main refrigerant loop where the indoor heat exchanger is located, and a second control valve is further arranged on the branch.
Preferably, the first and second electrodes are formed of a metal,
the air conditioner further comprises a detection unit, wherein the detection unit can detect the temperature T of the air conditioner chassisDishAnd the ambient temperature T in the roomInner part；
A determination unit capable of detecting the temperature T of the air conditioner chassisDishComparing the temperature with the preset temperature of the chassis to obtain a first comparison result; the judging unit can also detect the indoor environment temperature TInner partComparing the indoor temperature with a preset indoor temperature to obtain a second comparison result;
and the control unit can control the first control valve to be opened or closed and control the second control valve to be opened or closed according to the first comparison result and the second comparison result.
Preferably, the first and second electrodes are formed of a metal,
the preset chassis temperatures comprise a first preset chassis temperature T1, a second preset chassis temperature T2 and T1> T2;
the preset indoor temperature is T3;
when the detected temperature T of the air conditioner chassisDish>At T1, controlling a second control valve to be closed, controlling a refrigerant of an air conditioning system not to flow through the branch and the chassis heating module, and controlling the first control valve to be opened and normally heating the indoor space;
when the detected temperature T2 < T of the air conditioner chassisDish< T1 and when T is presentInner part-T3︱≤TError of the measurementAnd controlling the first control valve and the second control valve to be opened, wherein one part of refrigerant of the air conditioning system flows through the indoor heat exchanger to heat, and the other part of refrigerant flows through the chassis heating module through the branch to defrost or deice the air conditioning chassis, wherein TError of the measurementIs the error temperature;
when the detected temperature T2 < T of the air conditioner chassisDish< T1 and when T is presentInner part-T3︱＞TError of the measurementThe first control valve is controlled to be opened, the second control valve is controlled to be closed, and a refrigerant of the air-conditioning system only flows through the indoor heat exchanger to heat and does not flow through the branch and the air-conditioning chassis heating module;
when the detected temperature T of the air conditioner chassisDishWhen the temperature is less than T2, the first control valve and the second control valve are controlled to be opened and closed alternately, so that a refrigerant of an air conditioning system flows through the indoor heat exchanger for heating and does not flow through the branch and the chassis heating module, and flows through the branch and the chassis heating module and does not flow through the indoor heat exchanger for heating.
Preferably, the first and second electrodes are formed of a metal,
the temperature of T1 is 0 ℃, T2 is-5 ℃, and the temperature of T1 isError of the measurement＝3℃。
Preferably, the first and second electrodes are formed of a metal,
the bypass is also wound on the compressor housing before returning to the low pressure suction side of the compressor.
The invention also provides an air conditioner control method which uses the air conditioner control system and is used for controlling the air conditioner according to the temperature T of the air conditioner chassisDishAnd indoor ambient temperature TInner partAnd controlling defrosting or deicing of the air conditioner chassis.
Preferably, the first and second electrodes are formed of a metal,
further comprises a detection step, wherein the detection step can detect the temperature T of the air conditioner chassisDishAnd the ambient temperature T in the roomInner part；
A judging step of detecting the temperature T of the air conditioner chassisDishComparing the temperature with the preset temperature of the chassis to obtain a first comparison result; the determining step may further include determining a detected indoor ambient temperature TInner partComparing the indoor temperature with a preset indoor temperature to obtain a second comparison result;
and a control step of controlling the first control valve to be opened or closed and the second control valve to be opened or closed according to a first comparison result and a second comparison result when a first control valve is arranged on a main refrigerant loop where the indoor heat exchanger is arranged and a second control valve is also arranged on the branch path.
Preferably, the first and second electrodes are formed of a metal,
the preset chassis temperatures comprise a first preset chassis temperature T1, a second preset chassis temperature T2 and T1> T2;
the preset indoor temperature is T3;
when the detected temperature T of the air conditioner chassisDish>At T1, the second control valve is controlled to be closed, the refrigerant of the air conditioning system does not flow through the branch and the chassis heating module, the first control valve is controlled to be opened, and the indoor normal heating is realized;
when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t2 < TDish< T1 and when T is presentInner part-T3︱≤TError of the measurementWhen the air conditioner is started, the first control valve and the second control valve are controlled to be opened, one part of refrigerant of the air conditioning system flows through the indoor heat exchanger to heat, the other part of refrigerant flows through the chassis heating module through the branch to defrost or deice the air conditioning chassis, wherein T isError of the measurementIs the error temperature;
when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t2 < TDish< T1 and when T is presentInner part-T3︱＞TError of the measurementWhen the air conditioner is started, the first control valve is controlled to be opened, the second control valve is controlled to be closed, and a refrigerant of the air conditioning system only flows through the indoor heat exchanger to heat and does not flow through the branch circuit and the chassis heating module;
when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t isDishWhen the temperature is less than T2, the first control valve and the second control valve are controlled to be opened and closed alternately, so that a refrigerant of an air conditioning system flows through the indoor heat exchanger for heating and does not flow through the branch and the chassis heating module, and flows through the branch and the chassis heating module and does not flow through the indoor heat exchanger for heating.
Preferably, the first and second electrodes are formed of a metal,
the temperature of T1 is 0 ℃, T2 is-5 ℃, and the temperature of T1 isError of the measurement＝3℃。
The air conditioner control system and the control method provided by the invention have the following beneficial effects:
1. according to the invention, the branch is led out between the high-pressure exhaust end of the compressor and the indoor heat exchanger and connected to the air conditioner chassis to heat the air conditioner chassis and return to the air suction end of the compressor, so that the air conditioner chassis can be heated by using a high-temperature and high-pressure refrigerant to deice or defrost the air conditioner chassis, and compared with the existing electric heating defrosting or deicing mode, the ice can be melted by using the refrigerant, so that the energy is fully utilized, the energy efficiency is improved, the power consumption is reduced, the energy is saved, the emission is reduced, and the reliability problem is avoided; the problem that ice on the chassis is difficult to melt under extremely cold conditions to cause friction between the fan blades and ice blocks can be solved, and the problems that the external machine is high in operation noise and easy to have mechanical faults in severe cold regions are solved from the source;
2. the invention also monitors the indoor environment temperature, the set temperature and the chassis temperature data, intelligently controls the household air conditioner under the condition that the chassis is frozen according to the environment temperature, the actual use requirement of a client and the chassis freezing condition, intelligently controls whether the chassis needs to be heated for defrosting or not, achieves the purposes of energy saving, comfort and humanization, and can simultaneously realize the beneficial effects of chassis defrosting or defrosting, indoor comfortable heating and energy efficiency improvement;
3. according to the intelligent control system, control equipment is switched among three modes of heating, heating + chassis deicing, heating → chassis deicing → heating circulation; a chassis defrosting plate is designed in an air conditioner system, and a high-temperature high-pressure high-flow-rate refrigerant is adopted to heat a chassis, so that the problem of chassis icing is solved; through intelligent detection and judgment, if the indoor side has large demand for heating capacity, the heating effect is preferentially ensured, and the comfort is improved; through intelligent detection and judgment, if the chassis is frosted seriously, the chassis is subjected to defrosting control preferentially through a quick defrosting mode, so that the reliability of the whole machine is improved; through intellectual detection system and judgement, if the indoor side is little to the heating capacity demand, give indoor side and chassis heat supply simultaneously through flow distribution, both satisfied the effect of heating and reach the purpose that the chassis defrosted.
Drawings
Fig. 1 is a schematic structural diagram (only heating and not melting ice) of the air conditioning control system of the present invention in a first operating mode (refrigerant does not flow through a chassis heating module, and only flows through an indoor heat exchanger);
fig. 2 is a schematic structural view (heating + deicing) of the air conditioning control system of the present invention in a second operation mode (refrigerant flows through both the chassis heating module and the indoor heat exchanger);
fig. 3 is a schematic structural view (ice melting and no heating) of the air conditioning control system of the present invention in a third operating mode (refrigerant flows through the chassis heating module and does not flow through the indoor heat exchanger);
fig. 4 is a detailed flowchart of the present invention for implementing intelligent control of switching operating modes.
The reference numbers in the figures denote:
1. a compressor; 11. a high pressure exhaust end; 12. a low pressure suction end; 2. an indoor heat exchanger; 3. an outdoor heat exchanger; 4. a branch circuit; 5. a chassis heating module; 61. a first control valve; 62. a second control valve; 7. a main refrigerant circuit.
Detailed Description
As shown in fig. 1 to 3, the present invention provides an air conditioning control system, which includes:
a compressor 1, an indoor heat exchanger 2, an outdoor heat exchanger 3,
a branch 4 is further branched from a pipeline between the high-pressure exhaust end 11 of the compressor 1 and the indoor heat exchanger 2, a chassis heating module 5 is arranged on the branch 4 and can heat an air conditioner chassis, and the other end of the branch 4 is connected back to the low-pressure air suction end 12 of the compressor.
According to the invention, the branch is led out between the high-pressure exhaust end of the compressor and the indoor heat exchanger and connected to the air conditioner chassis to heat the air conditioner chassis and return to the air suction end of the compressor, so that the air conditioner chassis can be heated by using a high-temperature and high-pressure refrigerant to deice or defrost the air conditioner chassis, and compared with the existing electric heating defrosting or deicing mode, the ice can be melted by using the refrigerant, so that the energy is fully utilized, the energy efficiency is improved, the power consumption is reduced, the energy is saved, the emission is reduced, and the reliability problem is avoided; the problem that ice on the chassis is difficult to melt under extremely cold conditions to cause friction between the fan blades and ice blocks can be solved, and the problems that an external machine in a severe cold region is high in operation noise and easy to cause mechanical faults are solved from the source.
Preferably, the first and second electrodes are formed of a metal,
a first control valve 61 is arranged on the main refrigerant loop 7 where the indoor heat exchanger 2 is located, and a second control valve 62 is further arranged on the branch 4. The on-off of the main refrigerant loop can be controlled through the first control valve arranged on the main refrigerant loop, and the on-off of the branch can be controlled through the second control valve arranged on the branch, so that a control means is provided for realizing intelligent control.
Preferably, the first and second electrodes are formed of a metal,
the air conditioner further comprises a detection unit, wherein the detection unit can detect the temperature T of the air conditioner chassisDishAnd the ambient temperature T in the roomInner part；
A determination unit capable of detecting the temperature T of the air conditioner chassisDishComparing the temperature with the preset temperature of the chassis to obtain a first comparison result; the judging unit can also detect the indoor environment temperature TInner partComparing the indoor temperature with a preset indoor temperature to obtain a second comparison result;
and the control unit can control the first control valve 61 to be opened or closed and the second control valve 62 to be opened or closed according to the first comparison result and the second comparison result.
According to the invention, the indoor environment temperature, the set temperature and the chassis temperature data are monitored, the household air conditioner is intelligently controlled under the condition that the chassis is frozen according to the environment temperature, the actual use requirement of a client and the chassis freezing condition, whether the chassis needs to be heated and defrosted or not is intelligently controlled, the purposes of energy saving, comfort and humanization are achieved, the beneficial effects of chassis deicing or defrosting, indoor comfortable heating and energy efficiency improvement can be simultaneously realized, the energy efficiency value of the air conditioning system can be improved to the greatest extent while the chassis deicing or defrosting is met and the indoor heating is ensured, and the energy consumption and power consumption are reduced.
Preferably, the first and second electrodes are formed of a metal,
the preset chassis temperatures comprise a first preset chassis temperature T1, a second preset chassis temperature T2 and T1> T2;
the preset indoor temperature is T3;
first mode of operation, see fig. 1: when the detected temperature T disc of the air-conditioning chassis is greater than T1, controlling the second control valve 62 to be closed, preventing the refrigerant of the air-conditioning system from flowing through the branch 4 and the chassis heating module 5, and controlling the first control valve 61 to be opened and normally heating the indoor space; a first mode of operation, see fig. 1;
second mode of operation, see fig. 2: when the detected temperature T2 of the air-conditioning chassis is less than T disc and less than T1, and when the error of | T interior-T3 | is less than or equal to T error, the first control valve 61 and the second control valve 62 are controlled to be opened, one part of refrigerant of the air-conditioning system flows through the indoor heat exchanger 2 to perform heating, and the other part of refrigerant flows through the chassis heating module 5 through the branch 4 to perform defrosting or deicing on the air-conditioning chassis, wherein the T error is error temperature;
when any one of the following conditions is satisfied: the temperature of the chassis is more than or equal to minus 5 ℃ and less than or equal to 0 ℃, the indoor temperature-design temperature is less than or equal to 3 ℃,
the air conditioner operates according to a heating and chassis deicing mode, the chassis deicing module starts to operate in the mode, the mode exits when the difference between the ambient temperature and the set temperature exceeds 3 ℃ or the chassis temperature is greater than 0 ℃, and a system diagram when the air conditioner operates according to the heating and chassis deicing mode is as shown in fig. 2: at this time, according to the flow direction of the refrigerant, the system circulation mode is as follows:
route 1: compressor-high pressure pipe-two way valve (first control valve 61) -four way valve-indoor heat exchanger-throttling device-low pressure pipe-outdoor heat exchanger.
Route 2: compressor-high pressure pipe-two-way valve (second control valve 62) -chassis heating module-compressor external heat exchange coil.
At the moment, all the two-way valves and the electronic expansion valves are put into use, and the high-temperature and high-pressure refrigerant discharged by the compressor is divided into 2 flow paths to supply heat to the internal machine and the chassis heating module respectively.
Fourth mode of operation, see fig. 1: when the detected temperature T2 of the air conditioner chassis is less than T disc and less than T1 and the error of-T3 | in T is greater than T, the first control valve 61 is controlled to be opened, the second control valve 62 is controlled to be closed, and the refrigerant of the air conditioner system only flows through the indoor heat exchanger 2 to be heated and does not flow through the branch 4 and the air conditioner chassis heating module 5;
when the following conditions are satisfied: the temperature of the chassis is more than or equal to minus 5 ℃ and less than or equal to 0 ℃, and the indoor temperature-design temperature is more than or equal to 3 DEG C
The air conditioner sets a chassis heating module to stop working, and the two-way valve in front of the chassis heating module is automatically controlled to be closed in the mode. The system diagram for realizing the shutdown of the chassis heating module is shown in figure 1: according to the flow direction of the refrigerant, the system circulation mode is as follows: the compressor-the high pressure pipe-the two-way valve (the first control valve 61) -the four-way valve-the indoor heat exchanger-the throttling device-the low pressure pipe-the outdoor heat exchanger, and the air conditioning cycle at this time is identical to the ordinary air conditioning cycle system.
Third mode of operation, as in fig. 3: and secondly, when the detected temperature Tpanel of the air-conditioning chassis is less than T2, controlling the first control valve 61 and the second control valve 62 to be opened and closed alternately, so that the refrigerant of the air-conditioning system does not flow through the branch 4 and the chassis heating module 5 when flowing through the indoor heat exchanger 2 for heating, and does not flow through the indoor heat exchanger 2 when flowing through the branch 4 and the chassis heating module 5 for heating.
When the following conditions are satisfied: the temperature of the chassis is lower than-5 DEG C
The air conditioner is controlled according to a mode of heating → chassis deicing → heating circulation:
(1) the air conditioner operates for a certain time according to heating, and at the moment, the chassis heating module is not put into use.
(2) And after the heating operation time reaches the set time, the heating mode stops operating, and the high-temperature and high-pressure refrigerant discharged by the compressor only flows through the chassis heating module, so that the chassis achieves the purpose of quickly deicing.
(3) And after the chassis heating module operates for a certain time, closing the chassis heating module for use, and rotating the chassis heating module to operate in the mode (1). The cycle is performed in accordance with the (1) → (2) → (1) mode of operation.
The system diagram when operating in accordance with mode (1) is as follows:
according to the flow direction of the refrigerant, the system circulation mode is as follows: compressor-high pressure pipe-two way valve (first control valve 61) -four way valve-indoor heat exchanger-throttling device-low pressure pipe-outdoor heat exchanger.
The air conditioning cycle at this time is identical to a general air conditioning cycle system. As in fig. 1.
Third mode of operation, see fig. 3: the system diagram when operating in the manner (2) is as follows: according to the flow direction of the refrigerant, the system circulation mode is as follows: compressor-high pressure tube-two-way valve-base plate heating module-compressor external heat exchange coil.
At the moment, the high-temperature and high-pressure refrigerant discharged by the compressor only flows through the chassis heating module, and the valve B is closed. The heat of the system can be completely concentrated to the chassis for supplying heat to achieve the purpose of quickly melting ice (figure 3).
According to the intelligent control system, control equipment is switched among three modes of heating, heating + chassis deicing, heating → chassis deicing → heating circulation; a chassis defrosting plate is designed in an air conditioner system, and a high-temperature high-pressure high-flow-rate refrigerant is adopted to heat a chassis, so that the problem of chassis icing is solved; through intelligent detection and judgment, if the indoor side has large demand for heating capacity, the heating effect is preferentially ensured, and the comfort is improved; through intelligent detection and judgment, if the chassis is frosted seriously, the chassis is subjected to defrosting control preferentially through a quick defrosting mode, so that the reliability of the whole machine is improved; through intellectual detection system and judgement, if the indoor side is little to the heating capacity demand, give indoor side and chassis heat supply simultaneously through flow distribution, both satisfied the effect of heating and reach the purpose that the chassis defrosted.
Preferably, the first and second electrodes are formed of a metal,
the T1 ═ 0 ℃, T2 ═ -5 ℃, and the T error ═ 3 ℃.
The invention 1, through adopting the refrigerant of high temperature, high pressure, large flow velocity to heat the chassis, solve the problem that the chassis freezes, the drainage is not smooth; 2. the indoor environment temperature, the set temperature and the chassis temperature data are monitored, whether the chassis needs to be heated for defrosting or not is intelligently controlled, and the purposes of energy conservation, comfort and humanization are achieved; 3. when the intelligent detection system detects that the temperature of the chassis is higher than 0 ℃, the chassis defrosting mode is closed, and the purpose of improving the energy efficiency of the air conditioner is achieved; 4. when the intelligent detection system detects that the temperature of the chassis is between 0 ℃ and-5 ℃, and simultaneously detects that the indoor environment temperature is not too high and the environment temperature is lower than the set temperature, an intelligent control mode is started, and the connection between a refrigerant and a chassis defrosting plate is automatically cut off to ensure the indoor heat exchange effect; 5. when the intelligent detection system detects that the temperature of the chassis is lower than 0 ℃, and simultaneously detects that the indoor environment temperature is higher and the difference of the environment temperature is smaller than the set temperature, an intelligent control mode is started, and the flow of a refrigerant passing through a chassis defrosting plate is increased through flow change so as to achieve the purpose of rapid defrosting; 6. when the intelligent detection system detects that the temperature of the chassis is lower than minus 5 ℃, and simultaneously detects that the indoor environment temperature is not too high and the environment temperature is lower than the set temperature, an intelligent control mode is started, and the refrigerant is used for chassis defrosting in a sectional control mode, so that the indoor heat exchange effect is ensured, and the normal chassis defrosting is ensured.
Preferably, the first and second electrodes are formed of a metal,
the branch 4 is also wound on the casing of the compressor 1 before returning to the low-pressure suction end 12 of the compressor. The refrigerant flowing through the defrosting plate on the base plate firstly passes through the heat exchange plate fixed outside the compressor to recover the waste heat before returning to the compressor and then returns to the liquid storage tank of the compressor, so that the problem of liquid impact is prevented, and the heat exchange effect is improved.
Referring to fig. 1 to 4, the present invention further provides an air conditioner control method using the air conditioner control system according to any one of the preceding items, according to a temperature T of an air conditioner base plateDishAnd indoor ambient temperature TInner partAnd controlling defrosting or deicing of the air conditioner chassis. According to the invention, the indoor environment temperature, the set temperature and the chassis temperature data are monitored, the household air conditioner is intelligently controlled under the condition that the chassis is frozen according to the environment temperature, the actual use requirement of a client and the chassis freezing condition, whether the chassis needs to be heated and defrosted or not is intelligently controlled, the purposes of energy saving, comfort and humanization are achieved, the beneficial effects of chassis deicing or defrosting, indoor comfortable heating and energy efficiency improvement can be simultaneously realized, the energy efficiency value of the air conditioning system can be improved to the greatest extent while the chassis deicing or defrosting is met and the indoor heating is ensured, and the energy consumption and power consumption are reduced.
Preferably, the first and second electrodes are formed of a metal,
further comprising a detection step, said detectionThe temperature T of the air conditioner chassis can be detectedDishAnd the ambient temperature T in the roomInner part；
A judging step of detecting the temperature T of the air conditioner chassisDishComparing the temperature with the preset temperature of the chassis to obtain a first comparison result; the determining step may further include determining a detected indoor ambient temperature TInner partComparing the indoor temperature with a preset indoor temperature to obtain a second comparison result;
and a control step of controlling the first control valve 61 to be opened or closed and the second control valve 62 to be opened or closed according to a first comparison result and a second comparison result when the main refrigerant circuit 7 in which the indoor heat exchanger is located is provided with the first control valve 61 and the branch circuit 4 is further provided with the second control valve 62.
According to the intelligent control system, control equipment is switched among three modes of heating, heating + chassis deicing, heating → chassis deicing → heating circulation; a chassis defrosting plate is designed in an air conditioner system, and a high-temperature high-pressure high-flow-rate refrigerant is adopted to heat a chassis, so that the problem of chassis icing is solved; through intelligent detection and judgment, if the indoor side has large demand for heating capacity, the heating effect is preferentially ensured, and the comfort is improved; through intelligent detection and judgment, if the chassis is frosted seriously, the chassis is subjected to defrosting control preferentially through a quick defrosting mode, so that the reliability of the whole machine is improved; through intellectual detection system and judgement, if the indoor side is little to the heating capacity demand, give indoor side and chassis heat supply simultaneously through flow distribution, both satisfied the effect of heating and reach the purpose that the chassis defrosted.
Preferably, the first and second electrodes are formed of a metal,
the preset chassis temperatures comprise a first preset chassis temperature T1, a second preset chassis temperature T2 and T1> T2;
the preset indoor temperature is T3;
first mode of operation, see fig. 1: when the detected temperature T of the air conditioner chassisDish>At T1, the second control valve 62 is controlled to be closed, the refrigerant of the air conditioning system does not flow through the branch 4 and the chassis heating module 5, and the first control valve 61 is controlled to be openedNormal indoor heating is carried out;
second mode of operation, see fig. 2: when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t2 < TDish< T1 and when T is presentInner part-T3︱≤TError of the measurementWhen the air conditioner is running, the first control valve 61 and the second control valve 62 are controlled to be opened, one part of the refrigerant of the air conditioning system flows through the indoor heat exchanger 2 to heat, the other part of the refrigerant flows through the chassis heating module 5 through the branch 4 to defrost or deice the air conditioning chassis, wherein T isError of the measurementIs the error temperature;
when any one of the following conditions is satisfied: the temperature of the chassis is more than or equal to minus 5 ℃ and less than or equal to 0 ℃, the indoor temperature-design temperature is less than or equal to 3 ℃,
the air conditioner operates according to a heating and chassis deicing mode, the chassis deicing module starts to operate in the mode, the mode exits when the difference between the ambient temperature and the set temperature exceeds 3 ℃ or the chassis temperature is greater than 0 ℃, and a system diagram when the air conditioner operates according to the heating and chassis deicing mode is as shown in fig. 2: at this time, according to the flow direction of the refrigerant, the system circulation mode is as follows:
route 1: compressor-high pressure pipe-two way valve (first control valve 61) -four way valve-indoor heat exchanger-throttling device-low pressure pipe-outdoor heat exchanger.
Route 2: compressor-high pressure pipe-two-way valve (second control valve 62) -chassis heating module-compressor external heat exchange coil.
At the moment, all the two-way valves and the electronic expansion valves are put into use, and the high-temperature and high-pressure refrigerant discharged by the compressor is divided into 2 flow paths to supply heat to the internal machine and the chassis heating module respectively.
Fourth mode of operation, see fig. 1: when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t2 < TDish< T1, and when the liquid agent T is inside-T3 agent > TError of the measurementWhen the temperature of the refrigerant in the air conditioning system is higher than the preset temperature, the first control valve 61 is controlled to be opened, the second control valve 62 is controlled to be closed, and the refrigerant of the air conditioning system only flows through the indoor heat exchanger 2 to heat and does not flow through the branch 4 and the chassis heating module 5;
when the following conditions are satisfied: the temperature of the chassis is more than or equal to minus 5 ℃ and less than or equal to 0 ℃, and the indoor temperature-design temperature is more than or equal to 3 DEG C
The air conditioner sets a chassis heating module to stop working, and the two-way valve in front of the chassis heating module is automatically controlled to be closed in the mode. The system diagram for realizing the shutdown of the chassis heating module is shown in figure 1: according to the flow direction of the refrigerant, the system circulation mode is as follows: the compressor-the high pressure pipe-the two-way valve (the first control valve 61) -the four-way valve-the indoor heat exchanger-the throttling device-the low pressure pipe-the outdoor heat exchanger, and the air conditioning cycle at this time is identical to the ordinary air conditioning cycle system.
Third mode of operation, as in fig. 3: when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t isDishWhen the temperature is less than T2, the first control valve 61 and the second control valve 62 are controlled to be opened and closed alternately, so that the refrigerant of the air conditioning system does not flow through the branch circuit 4 and the chassis heating module 5 when flowing through the indoor heat exchanger 2 for heating, and does not flow through the indoor heat exchanger 2 when flowing through the branch circuit 4 and the chassis heating module 5 for heating.
When the following conditions are satisfied: the temperature of the chassis is lower than-5 DEG C
The air conditioner is controlled according to a mode of heating → chassis deicing → heating circulation:
(1) the air conditioner operates for a certain time according to heating, and at the moment, the chassis heating module is not put into use.
(2) And after the heating operation time reaches the set time, the heating mode stops operating, and the high-temperature and high-pressure refrigerant discharged by the compressor only flows through the chassis heating module, so that the chassis achieves the purpose of quickly deicing.
(3) And after the chassis heating module operates for a certain time, closing the chassis heating module for use, and rotating the chassis heating module to operate in the mode (1). The cycle is performed in accordance with the (1) → (2) → (1) mode of operation.
The system diagram when operating in accordance with mode (1) is as follows:
according to the flow direction of the refrigerant, the system circulation mode is as follows: compressor-high pressure pipe-two way valve (first control valve 61) -four way valve-indoor heat exchanger-throttling device-low pressure pipe-outdoor heat exchanger.
The air conditioning cycle at this time is identical to a general air conditioning cycle system. As in fig. 1.
Third mode of operation, see fig. 3: the system diagram when operating in the manner (2) is as follows: according to the flow direction of the refrigerant, the system circulation mode is as follows: compressor-high pressure tube-two-way valve-base plate heating module-compressor external heat exchange coil.
At the moment, the high-temperature and high-pressure refrigerant discharged by the compressor only flows through the chassis heating module, and the valve B is closed. The heat of the system can be completely concentrated to the chassis for supplying heat to achieve the purpose of quickly melting ice (figure 3).
According to the intelligent control system, control equipment is switched among three modes of heating, heating + chassis deicing, heating → chassis deicing → heating circulation; a chassis defrosting plate is designed in an air conditioner system, and a high-temperature high-pressure high-flow-rate refrigerant is adopted to heat a chassis, so that the problem of chassis icing is solved; through intelligent detection and judgment, if the indoor side has large demand for heating capacity, the heating effect is preferentially ensured, and the comfort is improved; through intelligent detection and judgment, if the chassis is frosted seriously, the chassis is subjected to defrosting control preferentially through a quick defrosting mode, so that the reliability of the whole machine is improved; through intellectual detection system and judgement, if the indoor side is little to the heating capacity demand, give indoor side and chassis heat supply simultaneously through flow distribution, both satisfied the effect of heating and reach the purpose that the chassis defrosted.
Preferably, the first and second electrodes are formed of a metal,
the temperature of T1 is 0 ℃, T2 is-5 ℃, and the temperature of T1 isError of the measurement＝3℃。
The invention 1, through adopting the refrigerant of high temperature, high pressure, large flow velocity to heat the chassis, solve the problem that the chassis freezes, the drainage is not smooth; 2. the indoor environment temperature, the set temperature and the chassis temperature data are monitored, whether the chassis needs to be heated for defrosting or not is intelligently controlled, and the purposes of energy conservation, comfort and humanization are achieved; 3. when the intelligent detection system detects that the temperature of the chassis is higher than 0 ℃, the chassis defrosting mode is closed, and the purpose of improving the energy efficiency of the air conditioner is achieved; 4. when the intelligent detection system detects that the temperature of the chassis is between 0 ℃ and-5 ℃, and simultaneously detects that the indoor environment temperature is not too high and the environment temperature is lower than the set temperature, an intelligent control mode is started, and the connection between a refrigerant and a chassis defrosting plate is automatically cut off to ensure the indoor heat exchange effect; 5. when the intelligent detection system detects that the temperature of the chassis is lower than 0 ℃, and simultaneously detects that the indoor environment temperature is higher and the difference of the environment temperature is smaller than the set temperature, an intelligent control mode is started, and the flow of a refrigerant passing through a chassis defrosting plate is increased through flow change so as to achieve the purpose of rapid defrosting; 6. when the intelligent detection system detects that the temperature of the chassis is lower than minus 5 ℃, and simultaneously detects that the indoor environment temperature is not too high and the environment temperature is lower than the set temperature, an intelligent control mode is started, and the refrigerant is used for chassis defrosting in a sectional control mode, so that the indoor heat exchange effect is ensured, and the normal chassis defrosting is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (5)

1. An air conditioner control system characterized in that: the method comprises the following steps:
a compressor (1), an indoor heat exchanger (2) and an outdoor heat exchanger (3),
a branch (4) is further branched from a pipeline between a high-pressure exhaust end (11) of the compressor (1) and the indoor heat exchanger (2), a chassis heating module (5) is arranged on the branch (4) and can heat an air conditioner chassis, and the other end of the branch (4) is connected back to a low-pressure suction end (12) of the compressor;
a first control valve (61) is arranged on a main refrigerant loop (7) where the indoor heat exchanger (2) is located, and a second control valve (62) is further arranged on the branch (4);
the air conditioner further comprises a detection unit, wherein the detection unit can detect the temperature T of the air conditioner chassisDishAnd indoorsAmbient temperature TInner part；
A determination unit capable of detecting the temperature T of the air conditioner chassisDishComparing the temperature with the preset temperature of the chassis to obtain a first comparison result; the judging unit can also detect the indoor environment temperature TInner partComparing the indoor temperature with a preset indoor temperature to obtain a second comparison result;
a control unit capable of controlling the first control valve (61) to open or close and the second control valve (62) to open or close according to a first comparison result and a second comparison result;
the preset chassis temperatures comprise a first preset chassis temperature T1, a second preset chassis temperature T2 and T1> T2;
the preset indoor temperature is T3;
when the detected temperature T of the air conditioner chassisDish>At T1, the second control valve (62) is controlled to be closed, the refrigerant of the air conditioning system does not flow through the branch circuit (4) and the chassis heating module (5), the first control valve (61) is controlled to be opened, and normal indoor heating is realized;
when the detected temperature T2 < T of the air conditioner chassisDish< T1 and when T is presentInner part-T3︱≤TError of the measurementThe first control valve (61) and the second control valve (62) are controlled to be opened, one part of refrigerant of the air conditioning system flows through the indoor heat exchanger (2) for heating, the other part of refrigerant flows through the chassis heating module (5) through the branch (4) for defrosting or deicing of the air conditioning chassis, wherein T isError of the measurementIs the error temperature;
when the detected temperature T2 < T of the air conditioner chassisDish< T1 and when T is presentInner part-T3︱＞TError of the measurementThe first control valve (61) is controlled to be opened, the second control valve (62) is controlled to be closed, and a refrigerant of an air conditioning system only flows through the indoor heat exchanger (2) for heating and does not flow through the branch circuit (4) and the air conditioning chassis heating module (5);
when the detected temperature T of the air conditioner chassisDish< T2, the first control valve (61) and the second control valve (62) are controlled to be alternately opened and closed so that the cooling of the air conditioning systemWhen the medium flows through the indoor heat exchanger (2) for heating, the medium does not flow through the branch (4) and the chassis heating module (5), and when the medium flows through the branch (4) and the chassis heating module (5), the medium does not flow through the indoor heat exchanger (2) for heating.
2. The air conditioning control system according to claim 1, characterized in that:
the temperature of T1 is 0 ℃, T2 is-5 ℃, and the temperature of T1 isError of the measurement＝3℃。
3. The air conditioning control system according to claim 1, characterized in that:
the branch (4) is also wound on the casing of the compressor (1) before returning to the low-pressure suction end (12) of the compressor.
4. An air conditioner control method is characterized in that: use of the air conditioning control system of any of claims 1-3, depending on the temperature T of the air conditioning baseDishAnd indoor ambient temperature TInner partControlling defrosting or deicing of the air conditioner chassis;
further comprises a detection step, wherein the detection step can detect the temperature T of the air conditioner chassisDishAnd the ambient temperature T in the roomInner part；
A judging step of detecting the temperature T of the air conditioner chassisDishComparing the temperature with the preset temperature of the chassis to obtain a first comparison result; the determining step may further include determining a detected indoor ambient temperature TInner partComparing the indoor temperature with a preset indoor temperature to obtain a second comparison result;
a control step, when a main refrigerant loop (7) where the indoor heat exchanger is located is provided with a first control valve (61) and the branch (4) is further provided with a second control valve (62), the control step can control the first control valve (61) to be opened or closed and the second control valve (62) to be opened or closed according to a first comparison result and a second comparison result;
the preset chassis temperatures comprise a first preset chassis temperature T1, a second preset chassis temperature T2 and T1> T2;
the preset indoor temperature is T3;
when the detected temperature T of the air conditioner chassisDish>At T1, the second control valve (62) is controlled to be closed, the refrigerant of the air conditioning system does not flow through the branch circuit (4) and the chassis heating module (5), the first control valve (61) is controlled to be opened, and normal indoor heating is realized;
when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t2 < TDish< T1 and when T is presentInner part-T3︱≤TError of the measurementWhen the air conditioner is started, the first control valve (61) and the second control valve (62) are controlled to be opened, one part of refrigerant of the air conditioner system flows through the indoor heat exchanger (2) for heating, the other part of refrigerant flows through the chassis heating module (5) through the branch (4) for defrosting or deicing of the air conditioner chassis, wherein T isError of the measurementIs the error temperature;
when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t2 < TDish< T1, and when the liquid agent T is inside-T3 agent > TError of the measurementWhen the air conditioner is used, the first control valve (61) is controlled to be opened, the second control valve (62) is controlled to be closed, and a refrigerant of the air conditioner system only flows through the indoor heat exchanger (2) for heating and does not flow through the branch circuit (4) and the chassis heating module (5);
when the detected temperature T of the air conditioner chassisDishAnd TInner partSatisfies the following conditions: t isDishWhen the temperature is less than T2, the first control valve (61) and the second control valve (62) are controlled to be opened and closed alternately, so that a refrigerant of an air conditioning system does not flow through the branch circuit (4) and the chassis heating module (5) when flowing through the indoor heat exchanger (2) for heating, and does not flow through the indoor heat exchanger (2) for heating when flowing through the branch circuit (4) and the chassis heating module (5).
5. The air conditioner control method according to claim 4, wherein:
the temperature of T1 is 0 ℃, T2 is-5 ℃, and the temperature of T1 isError of the measurement＝3℃。
CN201810910820.2A 2018-08-10 2018-08-10 Air conditioner control system and control method Active CN109269040B (en)

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