CN103743061B - The control method of dew-point dehumidifying - Google Patents

The control method of dew-point dehumidifying Download PDF

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Publication number
CN103743061B
CN103743061B CN201310738917.7A CN201310738917A CN103743061B CN 103743061 B CN103743061 B CN 103743061B CN 201310738917 A CN201310738917 A CN 201310738917A CN 103743061 B CN103743061 B CN 103743061B
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China
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dew
frequency
point
changeable compressor
control
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CN201310738917.7A
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Chinese (zh)
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CN103743061A (en
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尹洪海
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杭州悦居环境设备有限公司
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Abstract

The invention discloses a kind of control method of dew-point dehumidifying, the present invention utilizes the dew-point temperature at air inlet and air outlet place to control the operating frequency of the frequency-changeable compressor of frequency conversion fresh air dehumidifier, controller controls frequency-changeable compressor and runs, and air outlet place dew-point temperature is maintained in standard dew point temperature range.The control accuracy that the present invention has water capacity is high; Save electric energy, the feature of good economy performance.

Description

The control method of dew-point dehumidifying
Technical field
The present invention relates to refrigerated dehumidification control technology field, particularly relate to a kind of control method being applicable to the dew-point dehumidifying in the places such as family's villa, high-end residential, hotel, basement.
Background technology
Dew-point dehumidifying, as humidity conditioner, has obtained and has applied widely.But current dew-point dehumidifying adopts constant speed compressor to carry out energy adjustment, high frequent start and stop, and water capacity control accuracy is low, power consumption is large.In the dehumidification system of dew-point dehumidifying, adopt air dry-bulb temperature and relative humidity as controling parameters, air dry-bulb temperature and relative humidity are interactional two parameters, and when water capacity is consistent, if dry-bulb temperature rises, relative humidity declines; Otherwise dry-bulb temperature declines, relative humidity rises.
Thus using air dry-bulb temperature and relative humidity as the control method of controling parameters, a Parameters variation can affect another parameter, causes water capacity control accuracy low, and power consumption is large, and operating cost is high.
Chinese patent mandate publication number: CN101029881, authorize publication date on September 5th, 2007, disclose a kind of Measurement & Control method of assembled air-conditioner dew point, comprise the following steps: read and be arranged at the dry-bulb temperature of control objectives point and the measured value of relative humidity sensor; Obtain by controller the dew-point temperature that dew point temperature measurements value, dry-bulb temperature and relative humidity corresponding to the dry-bulb temperature of control objectives point and relative humidity measurements is provided with corresponding to value and be provided with value.The weak point of this invention is, accurately can not control the water capacity in air, power consumption is large.
Summary of the invention
Main purpose of the present invention is that the water capacity control accuracy in order to overcome dehumanization method of the prior art is low, and the deficiency that power consumption is large, provides a kind of control accuracy high, the control method of the dew-point dehumidifying that energy consumption is low.
To achieve these goals, the present invention is by the following technical solutions:
A control method for dew-point dehumidifying, described dew-point dehumidifying comprises controller, frequency-changeable compressor, air inlet and air outlet; Two Temperature Humidity Sensors are located on air inlet and air outlet respectively, and controller is electrically connected with frequency-changeable compressor, two Temperature Humidity Sensors respectively;
Dew-point dehumidifying also comprises indoor casing and outdoor machine shell, and described air inlet and air outlet are positioned on indoor casing.
Comprise the steps:
(1-1) being provided with standard dew point temperature range is in the controller A 1to A 2, be provided with 3 running frequency value F of frequency-changeable compressor 1, F 2and F 3, F 1< F 2< F 3; Be provided with dry-bulb temperature threshold value T 1, T 2, T 1< T 2; Being provided with relative humidity threshold value is Φ 1, Φ 2, Φ 1< Φ 2; Wherein, A 1< A 2;
(1-2) two Temperature Humidity Sensors detect air dry-bulb temperature T and the relative humidity Φ at air inlet and air outlet place respectively,
(1-3) controller utilizes formula T L = 273.3 ( 7.5 T T + 273.3 + L n &phi; 2.302585 - 2.0 ) 7.5 T T + 273.3 + L n &phi; 2.302585 + 5.5 Calculate dew-point temperature T l, and by the dew-point temperature T of air inlet and air outlet lstore in the controller;
(1-4) as the dry-bulb temperature T > T of air inlet 2and relative humidity Φ > Φ 2time, then controller controls frequency-changeable compressor according to F 3frequency run;
As the T of air inlet 1≤ T≤T 2and Φ 1≤ Φ≤Φ 2time, controller controls frequency-changeable compressor with F 2frequency run;
As air inlet dry-bulb temperature T < T 1and relative humidity Φ < Φ 1time, controller controls frequency-changeable compressor with F 1frequency run;
(1-5) controller controls frequency-changeable compressor operation, and makes air outlet place dew-point temperature maintain in standard dew point temperature range:
(1-5-1) as air outlet place dew-point temperature T l< A 1time, controller controls frequency-changeable compressor with F 1frequency run;
(1-5-2) as air outlet place dew-point temperature T l> A 2time, controller controls frequency-changeable compressor with F 3frequency run, proceed to step (1-5-1).
The present invention utilizes the dew-point temperature at air inlet and air outlet place to control the frequency-changeable compressor operating frequency of dew-point dehumidifying, and controller controls frequency-changeable compressor and runs, and air outlet place dew-point temperature is maintained in standard dew point temperature range.This invention removes the influence factor between air dry-bulb temperature and relative humidity two controling parameters usually adopted, high to the control accuracy of water capacity, power consumption is few.
As preferably, as the T of air outlet lmeet then controller control frequency-changeable compressor with frequency run;
As the T of air outlet lmeet then controller control frequency-changeable compressor with frequency run.
By T lwith a 1and A 2compare and limit further, making frequency-changeable compressor can under the requirement meeting standard dew point temperature range, power saving more.
As preferably, described T 2it is 28 DEG C to 32 DEG C.
As preferably, described T 1be 15 to 18 DEG C.
As preferably, described Φ 1be 43% to 47%.
As preferably, described Φ 2be 68% to 72%.
As preferably, F 1for 50Hz to 56Hz, F 2for 57Hz to 61Hz; F 3for 62Hz to 72H z.
Dew-point dehumidifying of the present invention also comprises evaporimeter, condenser, expansion valve, air is guided to flow through the pressure fan of described evaporimeter and the air after dehumidifying carried out to the heat exchanger of reheating, the outlet of frequency-changeable compressor and the entrance of described condenser link together, the outlet of described condenser and the entrance of described expansion valve link together, the outlet of described expansion valve and the entrance of described evaporimeter link together, the outlet of described evaporimeter and the entrance of described frequency-changeable compressor link together, described heat exchanger is provided with refrigerant import and refrigerant exit, the outlet of described refrigerant import and described frequency-changeable compressor links together, the import of described refrigerant exit and described expansion valve links together.
By changing the constant speed compressor of dew-point dehumidifying of the prior art into frequency-changeable compressor, make the present invention can by evaporimeter directly to air cooling-down to making air humidity meet the requirements and can realizing carrying out humid control by dew point, thus precooling, again cool equipment can be save.Owing to using frequency-changeable compressor instead and being heated to the temperature of needs through heat exchanger to the cold air after dehumidifying by the HTHP refrigerant steam that compression exports, the refrigerant of outflow heat exchanger continues to enter evaporimeter and carries out refrigerated dehumidification to air, therefore can save heat exchanger carry out heat supply auxiliary facility (as boiler hot-water system or electric heater etc.), structure is simplified further, and the condensation heat itself flowing through heat exchanger is that the used heat being discharged into outdoor condenser is used, reduce the load of condenser, thus energy consumption when making reheating is low simultaneously.
Described frequency-changeable compressor and condenser are arranged in described outdoor machine shell, described heat exchanger is fin copper tubular structure, described indoor casing is isolated into inlet air plenum by described heat exchanger and goes out air compartment, described inlet air plenum is isolated into dry-air blast room and wet wind room by described evaporimeter, described pressure fan and described air inlet are positioned at described wet wind room, go out air compartment described in described air outlet is positioned at.It is little that this topology layout takies the interior space, and Energy Efficiency Ratio during dehumidifying is high, dehumidifying is abundant.
Therefore, the present invention has following beneficial effect: the control accuracy of (1) water capacity is high; (2) electric energy is saved, good economy performance.
Accompanying drawing explanation
Fig. 1 is a kind of flow chart of embodiments of the invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment is as shown in Figure 1 a kind of control method of dew-point dehumidifying, comprises the steps:
Being provided with standard dew point temperature range is in the controller A 1to A 2, be provided with 3 running frequency value F of frequency-changeable compressor 1, F 2and F 3, F 1< F 2< F 3; Be provided with dry-bulb temperature threshold value T 1, T 2, T 1< T 2; Being provided with relative humidity threshold value is Φ 1, Φ 2, Φ 1< Φ 2; Wherein, A 1< A 2;
A in the present embodiment 1be 12 DEG C, A 2be 14 DEG C, T 2be 28 DEG C, T 1be 15 DEG C, Φ 1be 43%, Φ 2be 68%, F 1for 50Hz, F 2for 57Hz, F 3for 72Hz.
Step 100, two Temperature Humidity Sensors detect air dry-bulb temperature T and the relative humidity Φ at air inlet and air outlet place respectively,
Step 200, controller utilizes formula T L = 273.3 ( 7.5 T T + 273.3 + L n &phi; 2.302585 - 2.0 ) 7.5 T T + 273.3 + L n &phi; 2.302585 + 5.5 Calculate dew-point temperature T l, and by the dew-point temperature T of air inlet and air outlet lstore in the controller;
Step 300, as the dry-bulb temperature T > T of air inlet 2and relative humidity Φ > Φ 2time, then controller controls frequency-changeable compressor according to F 3frequency run;
As the T of air inlet 1≤ T≤T 2and Φ 1≤ Φ≤Φ 2time, controller controls frequency-changeable compressor with F 2frequency run;
As air inlet dry-bulb temperature T < T 1and relative humidity Φ < Φ 1time, controller controls frequency-changeable compressor with F 1frequency run;
Step 400, controller controls frequency-changeable compressor and runs, and makes air outlet place dew-point temperature maintain in standard dew point temperature range:
Step 401, as air outlet place dew-point temperature T l< A 1time, controller controls frequency-changeable compressor with F 1frequency run;
Step 402, as air outlet place dew-point temperature T l> A 2time, controller controls frequency-changeable compressor with F 3frequency run;
Step 500, as the T of air outlet lmeet then controller control frequency-changeable compressor with frequency run;
As the T of air outlet lmeet then controller control frequency-changeable compressor with frequency run, proceed to step 401.
In the present embodiment, F 2 + F 1 2 = 50 + 57 2 = 53.5 H z
Should be understood that the present embodiment is only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.

Claims (7)

1. a control method for dew-point dehumidifying, described dew-point dehumidifying comprises controller, frequency-changeable compressor, air inlet and air outlet; Two Temperature Humidity Sensors are located on air inlet and air outlet respectively, and controller is electrically connected with frequency-changeable compressor, two Temperature Humidity Sensors respectively; It is characterized in that, comprise the steps:
1-1, being provided with standard dew point temperature range is in the controller A 1to A 2, be provided with 3 running frequency value F of frequency-changeable compressor 1, F 2and F 3, F 1< F 2< F 3; Be provided with dry-bulb temperature threshold value T 1, T 2, T 1< T 2; Being provided with relative humidity threshold value is Φ 1, Φ 2, Φ 1< Φ 2; Wherein, A 1< A 2;
1-2, two Temperature Humidity Sensors detect air dry-bulb temperature T and the relative humidity Φ at air inlet and air outlet place respectively,
1-3, controller utilizes formula T L = 273.3 ( 7.5 T T + 273.3 + L n &phi; 2.302585 - 2.0 ) 7.5 T T + 273.3 + L n &phi; 2.302585 + 5.5 Calculate dew-point temperature T l, and by the dew-point temperature T of air inlet and air outlet lstore in the controller;
1-4, as the dry-bulb temperature T > T of air inlet 2and relative humidity Φ > Φ 2time, then controller controls frequency-changeable compressor according to F 3frequency run;
As the T of air inlet 1≤ T≤T 2and Φ 1≤ Φ≤Φ 2time, controller controls frequency-changeable compressor with F 2frequency run;
As air inlet dry-bulb temperature T < T 1and relative humidity Φ < Φ 1time, controller controls frequency-changeable compressor with F 1frequency run;
1-5, controller controls frequency-changeable compressor and runs, and makes air outlet place dew-point temperature maintain in standard dew point temperature range:
1-5-1, as air outlet place dew-point temperature T l< A 1time, controller controls frequency-changeable compressor with F 1frequency run;
1-5-2, as air outlet place dew-point temperature T l> A 2time, controller controls frequency-changeable compressor with F 3frequency run, proceed to step 1-5-1.
2. the control method of dew-point dehumidifying according to claim 1, is characterized in that, as the T of air outlet lmeet then controller control frequency-changeable compressor with frequency run;
As the T of air outlet lmeet then controller control frequency-changeable compressor with frequency run.
3. the control method of dew-point dehumidifying according to claim 1, is characterized in that, described T 2it is 28 DEG C to 32 DEG C.
4. the control method of dew-point dehumidifying according to claim 1, is characterized in that, described T 1be 15 to 18 DEG C.
5. the control method of dew-point dehumidifying according to claim 1, is characterized in that, described Φ 1be 43% to 47%.
6. the control method of dew-point dehumidifying according to claim 1, is characterized in that, described Φ 2be 68% to 72%.
7. the control method of the dew-point dehumidifying according to claim 1 or 2 or 3 or 4 or 5 or 6, is characterized in that, F 1for 50Hz to 56Hz, F 2for 57Hz to 61Hz; F 3for 62Hz to 72Hz.
CN201310738917.7A 2013-12-27 2013-12-27 The control method of dew-point dehumidifying CN103743061B (en)

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FR3035177A1 (en) * 2015-04-16 2016-10-21 Valeo Vision Device for controlling a vehicle lighting and / or signaling system
CN104790191B (en) * 2015-04-20 2017-05-10 广东美的制冷设备有限公司 Method and device for controlling dehumidifier and dehumidifier
CN104990227B (en) * 2015-07-28 2017-09-19 中国计量学院 A kind of control method of energy-saving type refrigeration and dehumidification machine
CN105509259B (en) * 2016-02-22 2018-07-03 珠海格力电器股份有限公司 Radiate the control method and relevant apparatus of fresh air conditioner system
CN107763790A (en) * 2016-08-19 2018-03-06 广东志高暖通设备股份有限公司 The dehumanization method and system of a kind of air conditioner
CN107477738A (en) * 2017-08-31 2017-12-15 四川酷比特科技有限公司 Low-temp radiating type idle call fresh air dehumidifying system and its control method
CN107477796A (en) * 2017-08-31 2017-12-15 四川酷比特科技有限公司 Low-temp radiating type idle call fresh air dehumidifying system control method
CN107869826B (en) * 2017-11-29 2019-08-30 广东美的制冷设备有限公司 Air conditioner and its control method and device
CN108731202A (en) * 2018-05-31 2018-11-02 四川长虹空调有限公司 A kind of convertible frequency air-conditioner dehumidification mode control method and air-conditioning
CN110671797A (en) * 2019-09-16 2020-01-10 珠海格力电器股份有限公司 Control method of air conditioning unit and related equipment
CN110848827A (en) * 2019-11-28 2020-02-28 广东美的制冷设备有限公司 Dehumidification device, dehumidification control method, and storage medium

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