CN102914030A - Thermostat dehumidification control method of air conditioner - Google Patents

Thermostat dehumidification control method of air conditioner Download PDF

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CN102914030A
CN102914030A CN2012103717267A CN201210371726A CN102914030A CN 102914030 A CN102914030 A CN 102914030A CN 2012103717267 A CN2012103717267 A CN 2012103717267A CN 201210371726 A CN201210371726 A CN 201210371726A CN 102914030 A CN102914030 A CN 102914030A
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air
conditioner
compressor
constant temperature
outdoor
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CN102914030B (en
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汪剑波
李丰
程志明
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GD Midea Air Conditioning Equipment Co Ltd
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Guangdong Midea Refrigeration Equipment Co Ltd
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Abstract

The invention discloses a thermostat dehumidification control method of an air conditioner. The air conditioner comprises a compressor, a condenser, an electronic expansion valve, an evaporator, a four-way reversing valve, an outdoor fan, an indoor fan, an indoor temperature sensor, an indoor humidity sensor and an outdoor temperature sensor; and the evaporator is divided into a heating section and a dehumidifying section by a dehumidifying electromagnetic valve. The dehumidifying operating mode of the air conditioner is divided into a cold room dehumidification control mode and a thermostat dehumidification control mode according to the difference between the temperature detected by the indoor temperature sensor and the temperature set by a remote controller. When the air conditioner is in the thermostat dehumidification control mode, the thermostat dehumidification control mode is further subdivided into three control areas according to the relative humidity detected by the indoor temperature sensor, thus the purposes of reducing the indoor temperature and keeping the temperature constant are achieved by controlling the frequency of the compressor, the rotation speed of the outdoor fan and various valves, and a conformable indoor environment is provided for the user.

Description

The constant temperature dehumidification control method of air-conditioner
Technical field
The present invention relates to air-conditioning technical field, relate in particular to a kind of indoor environment temperature that during dehumidifying, keeps constant and make room air reach the constant temperature dehumidification control method of the air-conditioner of comfort humidity.
Background technology
The dehumidification function of existing air-conditioner and the principle of normal refrigeration mode are basic identical, it is to obtain moisture removal by indoor fan with the gentle breeze operation, but, owing to making room temperature, the heat that can take away room air in dehumidifying descends, therefore, can bring discomfort to the user in the situation that room temperature is lower.
The purpose of not lowering the temperature for reaching dehumidifying, when adopting dehumidifying, open by more existing air-conditioners the control mode of electrical heating compensation refrigerating capacity, can in time adjust the unlatching of auxiliary electrical heater or close according to the variation of environment temperature, the control indoor environment temperature be in a constant level in dehumidifying.
Although existing this Dehumidification controlling mode can not increase production cost, but because the electrical efficiency of auxiliary electrical heater is very low, so that the air-conditioner Energy Efficiency Ratio is low, the power consumption is high, and this mode meeting can not reach real constant temperature dehumidification effect so that the indoor environment temperature fluctuation is very large.
Summary of the invention
Main purpose of the present invention is to provide a kind of constant temperature dehumidification control method of air-conditioner, keeps indoor environment temperature to be in constant level in the air-conditioner dehumidifying, and the user is in the middle of the suitable a home from home of humiture all the time.
In order to achieve the above object, the present invention proposes a kind of constant temperature dehumidification control method of air-conditioner, this air-conditioner comprises compressor, condenser, electric expansion valve, evaporimeter, four-way change-over valve, outdoor fan and indoor fan, wherein the dehumidified magnetic valve of evaporimeter is divided into bringing-up section and dehumidifying section, this air-conditioner also comprises and places indoor temperature sensor and humidity sensor, and place outdoor temperature sensor, the method may further comprise the steps:
S1, the temperature T S that sets according to the temperature T A that places indoor temperature sensor to detect and remote controller compares, and obtains Wen Du Cha ⊿ T=TA-TS;
S2 is divided into cold-room Dehumidification controlling pattern and constant temperature dehumidification control model: as ⊿ T Dao De ⊿ T with the air-conditioner operation mode that dehumidifies according to step S1 De〉be that cold-room Dehumidification controlling pattern , is the constant temperature dehumidification control model during Dang ⊿ T≤2 2 ℃ times;
S3 when air-conditioner is in the constant temperature dehumidification control model, further is subdivided into three control areas according to the relative humidity ψ that places indoor humidity sensor to detect with the constant temperature dehumidification pattern:
As ψ〉70% the time, be the A control area;
When 40<ψ≤70%, be the B control area;
When ψ≤40%, be the C control area.
Preferably, when air-conditioner was in cold-room Dehumidification controlling pattern, the outage of dehumidifying magnetic valve was in full-gear, and the frequency of compressor is according to the operation of dehumidifying peak frequency, and the rotating speed of outdoor fan and the aperture of electric expansion valve are controlled according to the refrigerating operaton pattern.
Preferably, when air-conditioner is in the constant temperature dehumidification control model, the dehumidifying magnetic valve powers on, be in throttle, the electric expansion valve standard-sized sheet, the frequency of compressor is according to each segmentation control area control, and the rotating speed of outdoor fan is controlled according to the outdoor temperature TO that places outdoor temperature sensor to detect.
Preferably, the speed setting of described compressor is the fourth gear frequency, is respectively F1, F2, F3, F4, and each frequency increases progressively successively.
Preferably, when air-conditioner was in the constant temperature dehumidification control model, the frequency of compressor according to the control mode of each segmentation control area was:
When air-conditioner was in the A control area, compressor adopted dehumidifying maximum frequency of operation F4;
When air-conditioner is in the B control area, calculates De ⊿ T according to current detection and control, wherein: ⊿ T 2 ℃ times, compressor adopts dehumidifying maximum frequency of operation F4; During 1 ℃<⊿ T≤2 ℃, compressor adopts running frequency F3; During 0 ℃<⊿ T≤1 ℃, compressor adopts running frequency F2; During-2 ℃<⊿ T≤0 ℃, compressor adopts running frequency F1; During ⊿ T≤-2 ℃, compressor shuts down;
When air-conditioner was in the C control area, compressor shut down;
When compressor shut down, outdoor fan also shut down.
Preferably, the motor of described air-conditioner outdoor fan is the DC continuous speed regulation motor, when air-conditioner is in the constant temperature dehumidification control model, controls the heat dissipation capacity of condenser and evaporimeter bringing-up section by the rotating speed of regulating outdoor fan and distributes.
Preferably, the speed setting of described outdoor fan is fourth gear, is respectively N1, N2, N3, N4, and each grade rotating speed increases progressively successively.
Preferably, when air-conditioner was in the constant temperature dehumidification control model, the rotating speed of outdoor fan according to the mode that the outdoor temperature TO that places outdoor temperature sensor to detect controls was:
As outdoor temperature TO〉33 ℃ times, the outdoor fan rotating speed is N4;
When 27 ℃<TO of outdoor temperature≤33 ℃, the outdoor fan rotating speed is N3;
When 20 ℃<TO of outdoor temperature≤27 ℃, the outdoor fan rotating speed is N2;
When 12 ℃<TO of outdoor temperature≤20 ℃, the outdoor fan rotating speed is N1;
When outdoor temperature TO≤12 ℃, outdoor fan shuts down.
The constant temperature dehumidification control method of a kind of air-conditioner that the present invention proposes, when air-conditioner dehumidifies, the temperature difference between the temperature that the temperature that detects according to indoor temperature sensor and remote controller are set is divided into cold-room Dehumidification controlling pattern and constant temperature dehumidification control model with the dehumidifying operation mode of air-conditioner, when air-conditioner is in the constant temperature dehumidification control model, further according to the relative humidity that places indoor humidity sensor to detect the constant temperature dehumidification pattern is subdivided into three control areas, simultaneously, by to compressor frequency, the control of outdoor fan rotating speed and various valves, reach and reduce indoor humidity and keep temperature to be in the purpose of constant level, thereby provide comfortable indoor environment for the user.
Description of drawings
Fig. 1 is the system block diagram of constant temperature dehumidification control air-conditioner of the present invention;
Fig. 2 is the schematic flow sheet of the constant temperature dehumidification control method preferred embodiment of air-conditioner of the present invention.
In order to make technical scheme of the present invention clearer, clear, be described in further detail below in conjunction with accompanying drawing.
The specific embodiment
With reference to Fig. 1 and Fig. 2, Fig. 1 is the system block diagram of constant temperature dehumidification control air-conditioner of the present invention; Fig. 2 is the schematic flow sheet of the constant temperature dehumidification control method preferred embodiment of air-conditioner of the present invention.
As shown in Figures 1 and 2, the constant temperature dehumidification control method of a kind of air-conditioner that the present embodiment proposes, this air-conditioner comprises compressor 1, condenser 2, electric expansion valve 3, evaporimeter 4, four-way change-over valve 5, outdoor fan 6 and indoor fan 7, wherein evaporimeter 4 dehumidified magnetic valves 8 are divided into bringing-up section 410 and dehumidifying section 420, this air-conditioner also comprises and places indoor temperature sensor and humidity sensor, and place outdoor temperature sensor, the method may further comprise the steps:
S1, the temperature T S that sets according to the temperature T A that places indoor temperature sensor to detect and remote controller compares, and obtains Wen Du Cha ⊿ T=TA-TS;
S2 is divided into cold-room Dehumidification controlling pattern and constant temperature dehumidification control model: as ⊿ T Dao De ⊿ T with the air-conditioner operation mode that dehumidifies according to step S1 De〉be that cold-room Dehumidification controlling pattern , is the constant temperature dehumidification control model during Dang ⊿ T≤2 2 ℃ times;
S3 when air-conditioner is in the constant temperature dehumidification control model, further is subdivided into three control areas according to the relative humidity ψ that places indoor humidity sensor to detect with the constant temperature dehumidification pattern:
As ψ〉70% the time, be the A control area;
When 40<ψ≤70%, be the B control area;
When ψ≤40%, be the C control area.
Particularly, when air-conditioner is in cold-room Dehumidification controlling pattern, 8 outages of indoor dehumidification magnetic valve, be in full-gear, because this valve port footpath is larger, therefore there is not throttle effect, this moment, bringing-up section 410 and the dehumidifying section 420 of evaporimeter 4 were all used as the evaporation dehumidification function, the refrigerant liquid outdoor electric expansion valve 3 rear reducing pressure by regulating flows of flowing through become low-temp low-pressure and contain the gas-liquid mixture of certain proportion gas, enter that evaporimeter 4 flows through bringing-up section 410 successively and dehumidifying section 420 is carried out evaporation endothermic, the temperature and humidity of room air is reduced simultaneously.For reaching preferably cool-down dehumidification effect, the frequency of compressor 1 is according to the operation of dehumidifying peak frequency, and indoor fan 7 is fixed as low wind running; The aperture of the rotating speed of outdoor fan 6 and electric expansion valve 3 is according to common refrigerating operaton pattern control.
When air-conditioner was in the constant temperature dehumidification control model, indoor dehumidification magnetic valve 8 powered on, and was in the throttle of certain aperture, there is throttle effect, electric expansion valve 3 standard-sized sheets, at this moment, air-conditioner is adjusted the leaving air temp of indoor evaporator 4 by the heat dissipation capacity of adjusting outdoor condenser 2.Simultaneously, the frequency of compressor 1 is according to each segmentation control area control, and the rotating speed of outdoor fan 6 is controlled according to the outdoor temperature TO that places outdoor temperature sensor to detect.
Particularly, the rotating speed condensation ability that can regulate condenser 2 by control outdoor fan 6, so that high pressure high temperature vapor partial condensation condenser 2 of discharging from compressor 1, because the aperture of control electric expansion valve 3 is standard-sized sheet, cold-producing medium is easy to enter the bringing-up section 410 continuation condensations of indoor evaporator 4, and the part room air flows through bringing-up section 410 and is heated under the effect of indoor fan 7.Throttle effect occurs through dehumidifying magnetic valve 8 in cold-producing medium after bringing-up section 410 is condensed into subcooled liquid, enter dehumidifying section 420 evaporation endothermics of indoor evaporator 4, another part room air flows through dehumidifying section 420 and is cooled under the effect of indoor fan 7, humidity reduces simultaneously.Two parts air blows out after the air outlet of indoor set place of air-conditioner is mixed, and indoor environment temperature is kept constant, simultaneously humidity is reduced to comfort standard.
By the bringing-up section 410 that evaporimeter 4 rationally is set and the heat exchange area ratio that dehumidifies section 420, cooperate the frequency of compressor 1 and the rotating speed control of outdoor fan 66, can realize the purpose of constant temperature dehumidification.
The present embodiment compressor in air conditioner 1 is the rotating speed controllable type, corresponding constant temperature dehumidification control model is set with a series of running frequency, preferred embodiment as a kind of simplification, can be the fourth gear frequency with the speed setting of compressor 1, be respectively F1, F2, F3, F4, each frequency increases progressively successively, such as setting each frequency be: 25Hz, 30 Hz, 35 Hz, 40 Hz, frequency is larger, and moisture removal is larger, and indoor to blow out temperature then lower.
When air-conditioner is in the constant temperature dehumidification control model, divide three control areas that compressor 1 frequency is controlled according to the relative humidity ψ that places indoor humidity sensor to detect, be specially:
When air-conditioner was in the A control area, relative humidity was bigger than normal, and compressor 1 adopts dehumidifying maximum frequency of operation F4, such as 40Hz;
When air-conditioner is in the B control area, indoor relative humidity has been in the comfort standard, the Wen Cha ⊿ T(⊿ T=TA-TS of the temperature T S that sets according to the indoor temperature TA that places indoor temperature sensor to detect and remote controller this moment) indoor temperature is controlled, as shown in table 1 below:
⊿T(℃) Running frequency
⊿T>2 F4
1<⊿T≤2 F3
0<⊿T≤1 F2
-2<⊿T≤0 F1
⊿T≤-2 Shut down
Table 1
: ⊿ T wherein〉2 ℃ times, compressor 1 adopts dehumidifying maximum frequency of operation F4; During 1 ℃<⊿ T≤2 ℃, compressor 1 adopts running frequency F3; During 0 ℃<⊿ T≤1 ℃, compressor 1 adopts running frequency F2; During-2 ℃<⊿ T≤0 ℃, compressor 1 adopts running frequency F1; During ⊿ T≤-2 ℃, compressor 1 shuts down.
When air-conditioner was in the C control area, indoor relative humidity was on the low side, did not need dehumidifying, and compressor 1 shuts down.
When compressor 1 shuts down, the not outside discharges heat of air-conditioner, outdoor fan 6 also shuts down.
In addition, the motor of the present embodiment air-conditioner outdoor fan 6 is the DC continuous speed regulation motor, when air-conditioner is in the constant temperature dehumidification control model, controls condenser 2 by the rotating speed of regulating outdoor fan 6 and distributes with the heat dissipation capacity of evaporimeter 4 bringing-up sections 410.Outdoor fan 6 rotating speeds are high, and then condenser 2 heat dissipation capacities are large, and evaporimeter 4 bringing-up sections 410 heat dissipation capacities are little; Otherwise then condenser 2 heat dissipation capacities are little, and evaporimeter 4 bringing-up sections 410 heat dissipation capacities are large.
The present embodiment is fourth gear with the speed setting of outdoor fan 6 specifically, be respectively N1, N2, N3, N4, each grade rotating speed increases progressively successively, and namely corresponding shelves are Ultra-Low Speed, low speed, middling speed and high speed respectively, such as setting each rotating speed is: 400,550,700,850 rev/mins.
When air-conditioner was in the constant temperature dehumidification control model, the rotating speed of outdoor fan 6 was controlled according to the outdoor temperature TO that places outdoor temperature sensor to detect, and its concrete control mode is as shown in table 2 below:
Figure BDA0000220570451
Table 2
That is to say, as outdoor temperature TO 33 ℃ times, outdoor fan 6 rotating speeds are N4;
When 27 ℃<TO of outdoor temperature≤33 ℃, outdoor fan 6 rotating speeds are N3;
When 20 ℃<TO of outdoor temperature≤27 ℃, outdoor fan 6 rotating speeds are N2;
When 12 ℃<TO of outdoor temperature≤20 ℃, outdoor fan 6 rotating speeds are N1;
When outdoor temperature TO≤12 ℃, outdoor fan 6 shuts down.
The present embodiment air-conditioner switches corresponding operational mode by detection of dynamic indoor temperature and humidity and according to control logic, guarantees that indoor humidity is in comfort standard and holding temperature is constant, is the indoor environment of user's Creating Comfort.
Constant temperature dehumidification control method of the present invention passes through such scheme, when air-conditioner dehumidifies, the temperature difference between the temperature that the temperature that detects according to indoor temperature sensor and remote controller are set is divided into cold-room Dehumidification controlling pattern and constant temperature dehumidification control model with the dehumidifying operation mode of air-conditioner, when air-conditioner is in the constant temperature dehumidification control model, further according to the relative humidity that places indoor humidity sensor to detect the constant temperature dehumidification pattern is subdivided into three control areas, simultaneously, by to compressor 1 frequency, the control of outdoor fan 6 rotating speeds and various valves, reach and reduce indoor humidity and keep temperature to be in the purpose of constant level, thereby provide comfortable indoor environment for the user.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.

Claims (8)

1. the constant temperature dehumidification control method of an air-conditioner, this air-conditioner comprises compressor, condenser, electric expansion valve, evaporimeter, four-way change-over valve, outdoor fan and indoor fan, wherein the dehumidified magnetic valve of evaporimeter is divided into bringing-up section and dehumidifying section, this air-conditioner also comprises and places indoor temperature sensor and humidity sensor, and place outdoor temperature sensor, it is characterized in that, the method may further comprise the steps:
S1, the temperature T S that sets according to the temperature T A that places indoor temperature sensor to detect and remote controller compares, and obtains Wen Du Cha ⊿ T=TA-TS;
S2 is divided into cold-room Dehumidification controlling pattern and constant temperature dehumidification control model: as ⊿ T Dao De ⊿ T with the air-conditioner operation mode that dehumidifies according to step S1 De〉be that cold-room Dehumidification controlling pattern , is the constant temperature dehumidification control model during Dang ⊿ T≤2 ℃ 2 ℃ times;
S3 when air-conditioner is in the constant temperature dehumidification control model, further is subdivided into three control areas according to the relative humidity ψ that places indoor humidity sensor to detect with the constant temperature dehumidification pattern:
As ψ〉70% the time, be the A control area;
When 40<ψ≤70%, be the B control area;
When ψ≤40%, be the C control area.
2. the constant temperature dehumidification control method of air-conditioner according to claim 1, it is characterized in that, when air-conditioner is in cold-room Dehumidification controlling pattern, the outage of dehumidifying magnetic valve, be in full-gear, the frequency of compressor is according to the operation of dehumidifying peak frequency, and the rotating speed of outdoor fan and the aperture of electric expansion valve are controlled according to the refrigerating operaton pattern.
3. the constant temperature dehumidification control method of air-conditioner according to claim 1, it is characterized in that, when air-conditioner is in the constant temperature dehumidification control model, the dehumidifying magnetic valve powers on, be in throttle, the electric expansion valve standard-sized sheet, the frequency of compressor is according to each segmentation control area control, and the rotating speed of outdoor fan is controlled according to the outdoor temperature TO that places outdoor temperature sensor to detect.
4. the constant temperature dehumidification control method of air-conditioner according to claim 3 is characterized in that, the speed setting of described compressor is the fourth gear frequency, is respectively F1, F2, F3, F4, and each frequency increases progressively successively.
5. the constant temperature dehumidification control method of air-conditioner according to claim 4 is characterized in that, when air-conditioner was in the constant temperature dehumidification control model, the frequency of compressor according to the control mode of each segmentation control area was:
When air-conditioner was in the A control area, compressor adopted dehumidifying maximum frequency of operation F4;
When air-conditioner is in the B control area, calculates De ⊿ T according to current detection and control, wherein: ⊿ T 2 ℃ times, compressor adopts dehumidifying maximum frequency of operation F4; During 1 ℃<⊿ T≤2 ℃, compressor adopts running frequency F3; During 0 ℃<⊿ T≤1 ℃, compressor adopts running frequency F2; During-2 ℃<⊿ T≤0 ℃, compressor adopts running frequency F1; During ⊿ T≤-2 ℃, compressor shuts down;
When air-conditioner was in the C control area, compressor shut down;
When compressor shut down, outdoor fan also shut down.
6. the constant temperature dehumidification control method of each described air-conditioner according to claim 1-5, it is characterized in that, the motor of described air-conditioner outdoor fan is the DC continuous speed regulation motor, when air-conditioner is in the constant temperature dehumidification control model, controls the heat dissipation capacity of condenser and evaporimeter bringing-up section by the rotating speed of regulating outdoor fan and distribute.
7. the constant temperature dehumidification control method of air-conditioner according to claim 6 is characterized in that, the speed setting of described outdoor fan is fourth gear, is respectively N1, N2, N3, N4, and each grade rotating speed increases progressively successively.
8. the constant temperature dehumidification control method of air-conditioner according to claim 7, it is characterized in that, when air-conditioner was in the constant temperature dehumidification control model, the rotating speed of outdoor fan according to the mode that the outdoor temperature TO that places outdoor temperature sensor to detect controls was:
As outdoor temperature TO〉33 ℃ times, the outdoor fan rotating speed is N4;
When 27 ℃<TO of outdoor temperature≤33 ℃, the outdoor fan rotating speed is N3;
When 20 ℃<TO of outdoor temperature≤27 ℃, the outdoor fan rotating speed is N2;
When 12 ℃<TO of outdoor temperature≤20 ℃, the outdoor fan rotating speed is N1;
When outdoor temperature TO≤12 ℃, outdoor fan shuts down.
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