CN110418921A - Dehumidifier - Google Patents
Dehumidifier Download PDFInfo
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- CN110418921A CN110418921A CN201780085771.7A CN201780085771A CN110418921A CN 110418921 A CN110418921 A CN 110418921A CN 201780085771 A CN201780085771 A CN 201780085771A CN 110418921 A CN110418921 A CN 110418921A
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Abstract
Dehumidifier of the invention includes refrigerant circuit, is sequentially connected compressor, condenser, expansion device and evaporator with piping；Pressure fan makes air circulate from the wind path that dehumidifying object space returns to dehumidifying object space via evaporator and condenser；Inlet humidity sensor is set to the entrance of wind path；Evaporating temperature sensor measures the evaporating temperature of evaporator；And control unit, control unit control the operating frequency of compressor according to target humidity and the psychrometric difference of actual measurement humidity in the evaporating temperature range higher than the solidification point of water.
Description
Technical field
The present invention relates to the dehumidifiers for having the compressor for being compressed and being discharged to refrigerant.
Background technique
As an example of previous dehumidifier, following air-conditioning device is disclosed, which includes compression
Machine, the outdoor heat exchanger functioned as condenser and the first indoor heat exchanger, functioned as evaporator
Two indoor heat exchangers and the pressure fan that outside air is supplied to outdoor heat exchanger (for example, referring to patent document 1).
Patent Document 1 discloses: air-conditioning device is when carrying out dehumidifying operating, in order to which room temperature is maintained setting temperature
Degree, if room temperature is higher than set temperature, increases the revolving speed of pressure fan, if room temperature is lower than set temperature, reduces turning for pressure fan
Speed.
Patent document 1: Japanese Unexamined Patent Publication 3-31640 bulletin
In the air-conditioning device disclosed in patent document 1, heat exchange only can be adjusted by the revolving speed adjustment of pressure fan
Can, but it is highly difficult for only adjusting the air quantity of pressure fan and improve dehumidifying effect in a manner of making evaporator not generate frosting
's.
Summary of the invention
The present invention be it is made in order to solve above-mentioned problem, provide a kind of in a manner of making evaporator not generate frosting
Improve the dehumidifier of dehumidifying effect.
Dehumidifier of the invention includes refrigerant circuit, uses piping by compressor, condenser, expansion device and steaming
Hair device is sequentially connected, for refrigerant circulation；Pressure fan, make air from dehumidifying object space via the evaporator and condensation
Device and return it is described dehumidifying object space wind path in circulate；Inlet humidity sensor is set to the entrance of the wind path, right
The humidity of air is measured；Evaporating temperature sensor is measured the evaporating temperature of the evaporator；And control
Portion controls the compressor, the expansion device and the pressure fan, and the control unit is in the evaporating temperature
In the range higher than the solidification point of water, controlled according to the psychrometric difference of target humidity and the measured value of the inlet humidity sensor
Make the operating frequency of the compressor.
The present invention according to target humidity and surveys humidity in a manner of making evaporating temperature be not reduced to the solidification point of water
Psychrometric difference adjusts evaporating temperature to control the operating frequency of compressor, therefore can inhibit to generate knot on an evaporator on one side
Frost improves dehumidifying effect on one side.
Detailed description of the invention
Fig. 1 is the refrigerant loop figure for showing a configuration example of dehumidifier for embodiments of the present invention 1.
Fig. 2 is the block diagram for showing a configuration example of control unit shown in FIG. 1.
Fig. 3 is the air line chart for showing the variation of temperature and humidity of air.
Fig. 4 is the flow chart for showing an example of sequence of movement for dehumidifier shown in FIG. 1.
Fig. 5 is the flow chart for showing another example of sequence of movement of dehumidifier shown in FIG. 1.
Fig. 6 is the curve graph of the humidity and the relationship of time when showing dehumidifier shown in FIG. 1 operating.
Fig. 7 is the refrigerant loop figure for showing a configuration example of dehumidifier for embodiments of the present invention 2.
Fig. 8 is the flow chart for showing an example of sequence of movement for dehumidifier shown in Fig. 7.
Fig. 9 is the curve graph of an example of the power calibration coefficient for illustrating that the dehumidifying effect based on defrosting reduces.
Specific embodiment
Embodiment 1.
The structure of the dehumidifier of present embodiment 1 is illustrated.Fig. 1 is the dehumidifying for showing embodiments of the present invention 1
The refrigerant loop figure of one configuration example of machine.As shown in Figure 1, dehumidifier 1 has compressor 10, condenser 20, expansion device
30, evaporator 40, pressure fan 60 and control unit 50.Compressor 10, condenser 20, expansion device 30 and evaporator 40 are with matching
Pipe 15 is sequentially connected, and constitutes the refrigerant circuit for refrigerant circulation.It is provided in condenser 20 and evaporator 40 for making
Refrigerant and air carry out multiple cooling fins of heat exchange.
Pressure fan 60 sucks air from dehumidifying object space, and makes the air of sucking via evaporator 40 and condenser 20
And it circulates in the wind path 61 of return dehumidifying object space.Distinguish in evaporator 40 and condenser 20 in the air that wind path 61 flows
Pass through the gap of multiple cooling fins.The entrance of wind path 61 is provided with inlet humidity sensor 71, for measuring from dehumidifying object
Space is drawn into the humidity of the air of dehumidifier 1.The piping 15 of the refrigerant outlet of evaporator 40 is provided with measurement refrigerant
Evaporating temperature evaporating temperature sensor 45.
Inlet humidity sensor 71, evaporating temperature sensor 45 and expansion device 30 via signal wire and with control unit 50
Connection.Inlet humidity sensor 71 will be exported via signal wire to control unit 50 as the humidity H1 of measured value.Evaporating temperature passes
Sensor 45 will be exported via signal wire to control unit 50 as the evaporating temperature Te of measured value.In addition, being arranged in compressor 10
There is frequency converter (not shown), pressure fan 60 is provided with fan motor (not shown), frequency converter and fan motor are via signal wire
It is connect with control unit 50.
Compressor 10 carries out compression to the refrigerant sucked from evaporator 40 and is discharged to condenser 20.Expansion device 30 makes
The pressure of the refrigerant to circulate from condenser 20 to evaporator 40 declines, and expands refrigerant.Evaporator 40 is by making from dehumidifying
The air and refrigerant of object space sucking carry out heat exchange, thus cooling air.Condenser 20 passes through to cold in evaporator 40
But air and refrigerant after carry out heat exchange, to heat air.Condenser 20 plays function as reheater in dehumidifier 1
Energy.
Fig. 2 is the block diagram for showing a configuration example of control unit shown in FIG. 1.Control unit 50 is, for example, microcomputer.
As shown in Fig. 2, control unit 50 includes the memory 51 of storage program and executes the CPU (Central of processing according to program
Processing Unit: central processing unit) 52.
Control unit 50 passes through the operating frequency of control compressor 10 and pressure fan 60, controls the aperture of expansion device 30, from
And the refrigeration cycle in refrigerant circuit is controlled.Control unit 50 is based on the evaporation temperature obtained from evaporating temperature sensor 45
It spends to control the aperture of expansion device 30, so that the degree of superheat becomes setting value.Control unit 50 freezes temperature than water in evaporating temperature
It spends in high range, based on the value of the humidity H1 obtained from inlet humidity sensor 71, controls the operating frequency of compressor 10.Water
Solidification point it is different according to pressure, but in present embodiment 1 with the solidification point of water be 0 DEG C the case where be illustrated.
In addition, though be not shown in Fig. 1, but the water of the surface sweating in evaporator 40 will can also be stored
Drain pan is arranged under evaporator 40.In addition, with control unit 50 from the evaporation temperature for the refrigerant outlet side for being set to evaporator 40
The case where degree sensor 45 obtains evaporating temperature is illustrated, but the setting place of evaporating temperature sensor 45 is not limited to steam
The refrigerant outlet side for sending out device 40, is also possible to the both sides of refrigerant inlet side or refrigerant inlet and refrigerant outlet.This
The suction pressure sensor of the pressure of the refrigerant suction side of measurement compressor 10 also can be set outside, control unit 50 uses sucking
The measured value of pressure sensor calculates evaporating temperature.
Next, being illustrated referring to Fig.1 to the movement of the dehumidifier 1 of present embodiment 1.Control unit 50 makes compressor 10
Start with pressure fan 60, the aperture of expansion device 30 is set as initial value.Refrigerant be repeated according to from compressor 10 to
The sequence of condenser 20, expansion device 30 and evaporator 40 circulates and returns the circulation of compressor 10 in piping 15.
The air for being drawn into wind path 61 from dehumidifying object space passes through evaporator 40.At this point, passing through the evaporator 40 of low temperature
Air due to evaporator 40 carry out heat exchange and be cooled to dew-point temperature or less.It ties on the surface of its result evaporator 40
The absolute humidity of dew, air reduces.Air after absolute humidity reduction is when passing through condenser 20, due to the condenser with high temperature
20 carry out heat exchanges and are heated.By the air of condenser 20 due to being heated, to become the drying that relative humidity reduces
Air.The air of the drying thus allows for removing for dehumidifying object space from dehumidifier 1 to dehumidifying object space release
It is wet.
Fig. 3 is the air line chart for showing the variation of temperature and humidity of air.The longitudinal axis of Fig. 3 indicates absolute humidity, horizontal axis
Indicate the dry-bulb temperature of air.The variation of the temperature and humidity of the air flowed in wind path 61 is illustrated referring to Fig. 3.Figure
Solid arrow shown in 3 indicates the variation of the state of the temperature and humidity of air.State Si n expression shown in Fig. 3, which is inhaled into, to remove
The state of the air of wet machine 1, wind path 61 inlet.State Sout expression shown in Fig. 3 is blown out from dehumidifier 1, wind path
The state of the air in 61 exit.
It is drawn into the temperature of the air of dehumidifier 1, drops to open-air temperature from state Si n due to cooling in evaporator 40
(state Sv1 shown in Fig. 3).The humidity of air is reduced to absolute humidity and is equivalent to state along the line of relative humidity 100%
The value of Sv2.If air changes to state Sv2 from state Sv1, temperature is also reduced, but is heated simultaneously when through condenser 20
Rise to the temperature for being equivalent to state Sout.Then, compared with state Si n, relative humidity reduce state Sout air from
Dehumidifier 1 is discharged to dehumidifying object space.
In addition, control unit 50 can also be compared the humidity and target humidity of actual measurement in present embodiment 1, with
Such as the operating frequency of under type control compressor 10.Fig. 4 is an example for showing the sequence of movement of dehumidifier shown in FIG. 1
Flow chart.
Control unit 50 obtains measured value (step from inlet humidity sensor 71 and evaporating temperature sensor 45 with certain period
Rapid S101), determine whether evaporating temperature Te is higher than 0 DEG C (step S102).The time in 1 period is set as Δ t1.In step
In the judgement of S102, in the case where evaporating temperature Te is 0 DEG C of situation below, control unit 50 enters subsequent steps S105.It is evaporating
In the case that temperature Te is higher than 0 DEG C, humidity H1 that control unit 50 determines target humidity H0 and inlet humidity sensor 71iInto
Row compares.I is positive integer.Control unit 50 is based on target humidity H0 and humidity H1iPsychrometric difference Δ HiTo control the fortune of compressor 10
Turn frequency.
In the example of sequence shown in Fig. 4, in step s 103, control unit 50 determines psychrometric difference Δ HiWhether the is greater than
One threshold value TH1.First threshold TH1 is pre-saved in memory 51.It is psychrometric difference Δ H in the judgement result of step S103iIt is greater than
In the case where first threshold TH1, control unit 50 increases the operating frequency of compressor 10 by (step S104).On the other hand, in step
The judgement result of rapid S102 is psychrometric difference Δ HiFor in first threshold TH1 situation below, control unit 50 maintains compressor 10
Operating frequency is without change (step S105).In step S104, control unit 50 is also possible to psychrometric difference Δ HiWith first threshold
The difference of TH1 is bigger, keeps the increased value of the operating frequency of compressor 10 bigger.In addition, in step s105, control unit 50 can also be with
The operating frequency of compressor 10 is set to become smaller.
If control unit 50 does not generate the range of frosting according to sequential control dehumidifier 1 shown in Fig. 4, in evaporator 40
It is interior, dehumidifying effect can be improved according to the humidity of the actual measurement in dehumidifying object space and the difference of target humidity.Its result can
Arrive more quickly at the humidity of dehumidifying object space near target humidity.
In addition, control unit 50 can also be based on the time change of the humidity of actual measurement, with such as lower section in present embodiment 1
The operating frequency of formula control compressor 10.Fig. 5 is the process for showing another example of sequence of movement of dehumidifier shown in FIG. 1
Figure.Fig. 6 is the curve graph of the humidity and the relationship of time when showing the operating of dehumidifier shown in FIG. 1.The longitudinal axis of Fig. 6 indicates phase
Time is indicated to humidity, horizontal axis.In addition, being marked in flow chart shown in Fig. 5 to processing identical with processing shown in Fig. 4
Identical step number, and omit detail explanation.
In step s101, the humidity that control unit 50 with the period of time Δ t1, will obtain before and after time Δ t1
H1i-1With humidity H1iIt is stored in memory 51.Step S103 judgement the result is that psychrometric difference Δ HiFor first threshold TH1 or less
In the case where, control unit 50 is to the t the last time at the time ofi-1The humidity H1 of measurementi-1It is wet with psychrometric difference i.e. first of target humidity H0
Spend poor Δ Hi-1And t at the time of currentiThe humidity H1 of measurementiWith psychrometric difference i.e. the second psychrometric difference Δ H of target humidity H0i's
Size is compared (step S111).
In the judgement of step S111, for Δ Hi< Δ Hi-1In the case where, control unit 50 is according to the second psychrometric difference Δ Hi
Size reduce compressor 10 operating frequency (step S112).For example, it can be the second psychrometric difference Δ HiRelative to first
Psychrometric difference Δ Hi-1Ratio it is smaller, then control unit 50 more increases the ratio for reducing the operating frequency of compressor 10.Another party
Face is Δ H in the judgement result of step S111i≥ΔHi-1In the case where, control unit 50 maintain compressor 10 operating frequency and
It does not change (step S113).
In flow chart shown in Fig. 5, the situation for being 0 DEG C or less for evaporating temperature Te in the judgement result of step S102
Under, control unit 50 maintain the control (step S113) of the operating frequency of compressor 10, but can also carry out in this case
Reduce the control of operating frequency.
If control unit 50 can ensure necessary dehumidifying energy according to sequential control dehumidifier 1 shown in fig. 5 on one side
Power, the operating frequency for reducing compressor 10 on one side, so that dehumidifying effect be inhibited to become over.The power consumption of its result dehumidifier 1
It reduces, is able to carry out energy-saving operation.In addition, obtaining measurement from inlet humidity sensor 71 with control unit 50 referring to Fig. 4 and Fig. 5
The situation that the period of value is identical is illustrated, but these periods can also be different in Fig. 4 and flow chart shown in fig. 5.
The dehumidifier 1 of present embodiment 1 includes refrigerant circuit, uses piping by compressor 10, condenser 20, expansion
Device 30 and evaporator 40 are sequentially connected；Pressure fan 60, make air from dehumidifying object space via evaporator 40 and cold
It circulates in the wind path 61 of the return dehumidifying object space of condenser 20；Inlet humidity sensor 71 is set to the entrance of wind path 61；It steams
Temperature sensor 45 is sent out, the evaporating temperature of evaporator 40 is measured；And control unit 50, control unit 50 is in evaporating temperature than water
In the high range of solidification point, the operating frequency of compressor 10 is controlled according to target humidity and the psychrometric difference of actual measurement humidity.
According to the present embodiment 1, the operating frequency of compressor 10 is controlled according to target humidity and the psychrometric difference of actual measurement humidity
Rate and adjust evaporating temperature so that evaporating temperature is not reduced to the solidification point of water, therefore can inhibit on one side in evaporator 40
It generates frosting, improve dehumidifying effect on one side.In addition, if the value of psychrometric difference is bigger, the operating frequency of compressor 10 is bigger, it can
Arrive more quickly at the humidity of dehumidifying object space near target humidity.
In present embodiment 1, it is also possible to control unit 50 with certain period and obtains measurement from inlet humidity sensor
Value, difference i.e. the first psychrometric difference of the measured value and target humidities that obtained to last time and the measured value and target humidity that specifically obtain
Difference i.e. the second psychrometric difference be compared, in the case where the second psychrometric difference is smaller than the first psychrometric difference, reduce compressor 10 fortune
Turn frequency.In this case, it can be ensured that necessary dehumidifying effect inhibits dehumidifying effect to become over.Its result dehumidifier 1
Power consumption is reduced, and is able to carry out energy-saving operation.
Embodiment 2.
In the embodiment 1, dehumidifier 1 increases the operating frequency of compressor 10, so that evaporating temperature does not drop to water
Solidification point, to improve the refrigerating capacity of evaporator 40.But if even if evaporating temperature does not reach the solidification point of water
And becoming close to the solidification point of water, then the refrigerating capacity of evaporator 40 can reduce.Present embodiment 2 balancedly carry out dehumidifying and
Defrosting, to improve dehumidifying effect.
The structure of the dehumidifier of present embodiment 2 is illustrated.In present embodiment 2, to said in embodiment 1
The identical incomplete structure detail explanation of bright structure.Fig. 7 is a structure for showing the dehumidifier of embodiments of the present invention 2
At the refrigerant loop figure of example.
If being to increase inlet temperature sensor as shown in fig. 7, dehumidifier 1a is compared with structure shown in FIG. 1
72, the structure of outlet humidity sensor 81 and outlet temperature sensor 82.Inlet temperature sensor 72, outlet humidity sensor
81 and outlet temperature sensor 82 connect via signal wire with control unit 50.
Inlet temperature sensor 72 is set to the entrance of wind path 61.Inlet temperature sensor 72 is inhaled to from dehumidifying object space
The temperature entered to the air of dehumidifier 1a is measured.Inlet temperature sensor 72 makes the temperature T1 as measured value via signal
Line is exported to control unit 50.Outlet humidity sensor 81 and outlet temperature sensor 82 are set to the outlet of wind path 61.It exports wet
Degree sensor 81 is measured the humidity of the air blown out from dehumidifier 1a to dehumidifying object space.Outlet humidity sensor 81
Export the humidity H2 as measured value to control unit 50 via signal wire.Outlet temperature sensor 82 is to from dehumidifier 1a to removing
The temperature of the air of wet object space blowout is measured.Outlet temperature sensor 82 makes the temperature T2 as measured value via letter
Number line is exported to control unit 50.
Control unit 50, which is set with, inhibits frosting control, if meeting some requirements, forbids according to target humidity and entrance
The psychrometric difference of the measured value of humidity sensor 71 and the operating frequency for increasing compressor 10, and start to maintain or reduce compressor 10
Operating frequency inhibition frosting control.The setting of frosting control is inhibited for example to be also possible to user's operation remote controler (not shown)
It carries out, is also possible to user for the switch (not shown) for being set to dehumidifier 1a and is switched on state progress from off-state
's.Certain condition for example refers to the temperature that evaporating temperature Te is reduced to before evaporator 40 generates frosting.Hereinafter, by basis
The psychrometric difference of target humidity and the measured value of inlet humidity sensor 71 and the control for increasing the operating frequency of compressor 10 are known as
Usual Dehumidification controlling.
The memory 51 of control unit 50 stores: the data of air line chart, the dehumidifying different according to the type of dehumidifier 1a
Can force diagram data and corrected coefficient, that is, ability school is reduced to the ability for depending on humidity in dehumidifying effect line chart
Positive coefficient.The Fig. 3 illustrated in the embodiment 1 shows a part of the curve graph of air line chart.Control unit 50 is starting to inhibit
After frosting control, dehumidifying effect Q1 is simply calculated using the value of humidity H1, temperature T1, humidity H2 and temperature T2.Separately
Outside, dehumidifying effect, that is, type dehumidifying effect of the control unit 50 based on the rated capacity decision according to each type, finds out specified remove
Wet ability Q2.Moreover, control unit 50 dehumidifying effect Q1 be less than specified dehumidifying effect Q2 in the case where, derepression frosting control
System, starts again at usual Dehumidification controlling.
Next, being illustrated to the movement of the dehumidifier 1a of present embodiment 2.Fig. 8 is to show dehumidifier shown in Fig. 7
Sequence of movement an example flow chart.As original state, control unit 50 carries out usual Dehumidification controlling.
Control unit 50 will inhibit frosting control to be set to on-state by user.Even if frosting control is inhibited to be set to connect
State, control unit 50 also continues with usual Dehumidification controlling, until meeting some requirements.Control unit 50 is with time Δ t2
Period, from evaporating temperature sensor 45 obtain evaporating temperature Te (step S201).Whether control unit 50 determines evaporating temperature Te
It is 4.5 DEG C or less (step S202).Step S202 judgement the result is that evaporating temperature Te is control in 4.5 DEG C of situations below
Portion 50 processed stops usual Dehumidification controlling and executes to inhibit frosting control (step S203).By the operating frequency for forbidding compressor 10
Increase, so that evaporating temperature Te be inhibited to further decrease.It on the other hand, is evaporating temperature Te high in the judgement result of step S202
In the case where 4.5 DEG C, 50 return step S201 of control unit maintains usual Dehumidification controlling.
Although forbidding the increase of the operating frequency of compressor 10 in step S203, think that evaporating temperature Te further drops
It is low.Control unit 50 determines whether evaporating temperature Te is 3.5 DEG C or less (step S204).If in the judgement of step S204, evaporation
Temperature Te is 3.5 DEG C hereinafter, then control unit 50 reduces the operating frequency of compressor 10.Control unit 50 is by reducing compressor 10
Operating frequency and make evaporating temperature Te rise, so that the mode for not generating frosting in evaporator 40 is controlled.On the other hand,
In the case where the judgement result of step S204 is higher than 3.5 DEG C for evaporating temperature Te, control unit 50 maintains the operating of compressor 10
Frequency, and enter step S206.
Then, control unit 50 determines whether to have passed through time Δ t3 after the operating frequency of maintenance or reduction compressor 10
(step S206).There are time lag until due to generating the effect to the control of the operating frequency of compressor 10 until evaporator 40, because
This time Δ t3 is preferably than the time Δ t2 long for the frequency for determining the monitoring of evaporating temperature.Until by time Δ t3,
The judgement of step S204 is repeated in control unit 50, in the case where evaporating temperature Te is not bigger than 3.5 DEG C, reduces compressor 10
Operating frequency (step S205).The operating frequency for persistently reducing compressor 10 is controlled by inhibition frosting in control unit 50
In the case of, evaporating temperature Te rises, so that the temperature difference of air and evaporator 40 reduces.The refrigeration of evaporator 40 in this case
Ability reduces, and dehumidifying effect also reduces.
In evaporator 40, refrigerating capacity with the heat exchange performance as caused by frosting deterioration and reduce, but by with
The defrosting time for melting frost is equivalent to execute and inhibit frosting control, so that refrigerating capacity be made to restore.If but making to press
The operating frequency of contracting machine 10 persistently reduces, although then refrigerating capacity is restored, it is also possible to cause to maintain to inhibit frosting control.In the feelings
Under condition, dehumidifying effect is caused excessively to reduce.Therefore, to based on inhibit frosting control evaporator 40 refrigerating capacity recovery with
The reduction of refrigerating capacity is compared, and needs to confirm the switching for inhibiting frosting control and usual Dehumidification controlling.
Control unit 50 is simply calculated as follows since the operating frequency of compressor 10 reduces and reduced dehumidifying energy
Power Q1.If referring to air line chart shown in Fig. 3, the air that wind path 61 passes through state according to solid arrow shown in Fig. 3
Path Migration.Therefore control unit 50 is referring to air line chart, using the humidity H1 obtained from inlet humidity sensor 71 and from entering
The temperature T1 that mouthful temperature sensor 72 obtains, come calculate wind path 61 inlet air absolute humidity i.e. entrance absolute humidity
AHin.For the outlet side of wind path 61, control unit 50 is wet using obtaining from outlet humidity sensor 81 also referring to air line chart
Spend H2 and from outlet temperature sensor 82 obtain temperature T2, come calculate wind path 61 exit air absolute humidity i.e. out
Mouth absolute humidity AHout.
In addition, control unit 50 is poor to calculate absolute humidity using entrance absolute humidity AHin and outlet absolute humidity AHout
Δ AH=(entrance absolute humidity AHin- exports absolute humidity AHout).Control unit 50 passes through to calculated absolute humidity difference Δ
The air quantity that AH is determined multiplied by the type according to dehumidifier 1a simply calculates dehumidifying to calculate moisture removal per unit time
Ability Q1.
Next, the type dehumidifying energy that control unit 50 is determined according to the rated capacity of each type according to dehumidifier 1a
Power finds out specified dehumidifying effect Q2 as follows.Type dehumidifying effect is for example indicated with dehumidifying effect line chart.In view of frosting
Need to make the dehumidifying effect line chart of dehumidifier 1a multiplied by power calibration coefficient with the specified dehumidifying effect Q2 of defrosting.Power calibration system
Number is to reduce corrected coefficient to the ability for depending on humidity for type dehumidifying effect.Fig. 9 is to illustrate that be based on removing
The curve graph of one example of the power calibration coefficient that the dehumidifying effect of frost reduces.The longitudinal axis of Fig. 9 indicates that temperature, horizontal axis indicate phase
To humidity.
Power calibration coefficient changes according to the condition of temperature and humidity, but as shown in figure 9, be directed to dehumidifying effect line chart,
For the coefficient depending on humidity.Control unit 50 reads corresponding with humidity H1 when measurement from power calibration coefficient shown in Fig. 9
Power calibration coefficient makes the power calibration coefficient read multiplied by the data for the dehumidifying effect line chart for being stored in memory 51, thus
Calculate the specified dehumidifying effect Q2 for considering frosting and defrosting.It is in one example of sequence shown in Fig. 8 for humidity H1
The case where 60%~70% range.In this case, if referring to Fig. 9, power calibration coefficient is 0.6.
As described above, if control unit 50 is at the humidity H1 that inlet humidity sensor 71 determines, to based on inhibition knot
Dehumidifying effect Q1 when the operating frequency of the compressor 10 of frost control reduces and consider the specified dehumidifying energy of frosting and defrosting
Power Q2 is calculated, then is compared to dehumidifying effect Q1 and specified dehumidifying effect Q2.In step S207 shown in Fig. 8, control
Portion 50 processed determines whether dehumidifying effect Q1 is specified dehumidifying effect Q2 or more.Step S207 judgement result for Q1 >=Q2 feelings
Under condition, control unit 50 continues to inhibit frosting control and return step S201.On the other hand, in the judgement result of step S207
In the case where Q1 < Q2,50 derepression frosting of control unit control starts again at usual Dehumidification controlling (step S208).
In addition, being the situation that evaporating temperature Te is 4.5 DEG C or less with certain condition in the sequence illustrated referring to Fig. 8
It is illustrated, but the value of evaporating temperature Te is not limited to 4.5 DEG C, is also possible to 3.5 DEG C.In addition, certain condition and unlimited
In the evaporating temperature Te the case where, it is also possible to other conditions.In addition, time Δ t2 can be with the time Δ t1 phase of embodiment 1
Together, it can also be different.
In the dehumidifier 1a of present embodiment 2, if evaporating temperature drops to higher than the solidification point of water predetermine
Temperature, then control unit 50, which executes, forbids the operating frequency for increasing compressor 10 and maintains or reduce the operating frequency of compressor 10
Inhibition frosting control.The evaporating temperature pre-determined temperature higher than the solidification point of water is, for example, 4.5 DEG C.
According to the present embodiment 2, being possible to forbid compressor 10 at a temperature of evaporator 40 starts to generate frosting
The increase of operating frequency, therefore the defrosting based on room temperature can be carried out in evaporator 40, and restore refrigerating capacity.
In addition, for control unit 50 after starting to inhibit frosting control, use is wet in the dehumidifier 1a of present embodiment 2
Dehumidifying effect Q1 of value when simply calculating humidity H1 of degree H1, temperature T1, humidity H2 and temperature T2, and it is based on dehumidifier 1a
Type dehumidifying effect find out specified dehumidifying effect Q2, dehumidifying effect Q1 is compared with the size of specified dehumidifying effect Q2,
In the case where dehumidifying effect Q1 is less than specified dehumidifying effect Q2, derepression frosting control starts again at usual Dehumidification controlling.
If reducing the operating frequency of compressor 10 in a manner of making evaporating temperature be not reduced to the solidification point of water, evaporate
Temperature rises, and the temperature difference of air and evaporator 40 becomes smaller, therefore dehumidifying effect reduces.In present embodiment 2, control unit 50
Reduction to the refrigerating capacity based on frosting and the recovery of the refrigerating capacity based on defrosting are compared, so that dehumidifying effect increases
Mode automatically switching control.Therefore, it is able to suppress the recovery for being exceedingly evaporated the refrigerating capacity of device 40, more efficiently
Carry out the dehumidifying of dehumidifying object space.
According to the present embodiment 2, control unit 50 adjusts the operating frequency of compressor 10, controls evaporating temperature.By so that
The evaporating temperature mode higher than the solidification point of water is controlled, so as to prevent the moisture to condense in evaporator 40 from becoming
Ice inhibits the reduced performance of the heat exchanger based on frosting.Its result can reduce defrosting number, improve dehumidifying effect.
Description of symbols: 1,1a ... dehumidifier；10 ... compressors；15 ... pipings；20 ... condensers；30 ... expansion dresses
It sets；40 ... evaporators；45 ... evaporating temperature sensors；50 ... control units；51 ... memories；52…CPU；60 ... pressure fan；
61 ... wind paths；71 ... inlet humidity sensors；72 ... inlet temperature sensors；81 ... outlet humidity sensors；82 ... outlet temperature
Spend sensor.
Claims (5)
1. a kind of dehumidifier comprising:
Compressor, condenser, expansion device and evaporator are sequentially connected with piping, are followed for refrigerant by refrigerant circuit
Ring；
Pressure fan makes air return to the dehumidifying object sky via the evaporator and condenser from dehumidifying object space
Between wind path in circulate；
Inlet humidity sensor is set to the entrance of the wind path, is measured to the humidity of air；
Evaporating temperature sensor is measured the evaporating temperature of the evaporator；And
Control unit controls the compressor, the expansion device and the pressure fan,
The control unit is wet according to target humidity and the entrance in the evaporating temperature range higher than the solidification point of water
The psychrometric difference of the measured value of sensor is spent to control the operating frequency of the compressor.
2. dehumidifier according to claim 1, which is characterized in that
The control unit makes that the value of the psychrometric difference is bigger, then compressor operating frequency is bigger.
3. dehumidifier according to claim 1 or 2, which is characterized in that
The control unit obtains measured value from the inlet humidity sensor with certain period, and to the measured value of last time acquirement
And the difference of the target humidity i.e. the first psychrometric difference and the measured value specifically obtained and the difference of the target humidity i.e. the second humidity
Difference is compared, and in the case where second psychrometric difference is smaller than first psychrometric difference, reduces the operating frequency of the compressor.
4. dehumidifier according to any one of claims 1 to 3, which is characterized in that
If the evaporating temperature drops to the pre-determined temperature higher than the solidification point of water, the control unit execution is forbidden
The inhibition frosting for increasing the operating frequency of the compressor and maintaining or reduce the operating frequency controls.
5. dehumidifier according to claim 4, which is characterized in that also include
Inlet temperature sensor is set to the entrance of the wind path, is measured to the temperature of air；
Outlet humidity sensor is set to the outlet of the wind path, is measured to the humidity of air；And
Outlet temperature sensor is set to the outlet of the wind path, is measured to the temperature of air,
The control unit is based on the inlet humidity sensor, the inlet temperature after starting the inhibition frosting control
The measured value of sensor, the outlet humidity sensor and the outlet temperature sensor calculates dehumidifying effect, and will meter
The dehumidifying effect of calculating is compared with the specified dehumidifying effect based on rated capacity, more specified than this in calculated dehumidifying effect
In the case that dehumidifying effect is small, the inhibition frosting control is released, is started again at wet according to the target humidity and the entrance
Spend the control of the operating frequency of the psychrometric difference of the measured value of sensor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/011212 WO2018173120A1 (en) | 2017-03-21 | 2017-03-21 | Dehumidifier |
Publications (2)
| Publication Number | Publication Date |
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| CN110418921A true CN110418921A (en) | 2019-11-05 |
| CN110418921B CN110418921B (en) | 2021-01-19 |
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| CN201780085771.7A Active CN110418921B (en) | 2017-03-21 | 2017-03-21 | Dehumidifier |
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| Country | Link |
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| JP (1) | JP6843227B2 (en) |
| CN (1) | CN110418921B (en) |
| WO (1) | WO2018173120A1 (en) |
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| CN111596575A (en) * | 2020-05-25 | 2020-08-28 | 合肥天鹅制冷科技有限公司 | Condensation water taking control method for evaporator of all-condition air water making machine |
| CN111966032A (en) * | 2020-07-14 | 2020-11-20 | 中国人民解放军63653部队 | Actual dehumidification quantity measurement control software system |
| CN112212474A (en) * | 2020-09-14 | 2021-01-12 | 海信（山东）空调有限公司 | Dehumidifier and dehumidification control method |
| CN116518701A (en) * | 2023-07-05 | 2023-08-01 | 中建环能科技股份有限公司 | Method for improving dehumidification performance of evaporator of heat pump low-temperature drying equipment and electronic equipment |
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| JP7040424B2 (en) | 2018-11-29 | 2022-03-23 | 三菱電機株式会社 | Dehumidifier |
| CN112227043B (en) * | 2020-10-16 | 2023-04-18 | 青岛海尔空调器有限总公司 | Drying control method of drying system |
| CN216132008U (en) * | 2021-03-22 | 2022-03-25 | 青岛海尔空调电子有限公司 | Device for adjusting humidity |
| CN113847658B (en) * | 2021-10-22 | 2022-09-16 | 海信（广东）空调有限公司 | Dehumidifier and control method thereof |
| CN114777222A (en) * | 2022-04-25 | 2022-07-22 | 珠海格力电器股份有限公司 | Dehumidification system, control method and device thereof and storage medium |
| CN114893934A (en) * | 2022-05-24 | 2022-08-12 | 珠海格力电器股份有限公司 | Constant-temperature dehumidification evaporator, air conditioner and control method of constant-temperature dehumidification evaporator |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110418921B (en) | 2021-01-19 |
| JPWO2018173120A1 (en) | 2019-11-07 |
| WO2018173120A1 (en) | 2018-09-27 |
| JP6843227B2 (en) | 2021-03-17 |
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