KR20170061935A - Control device of the inverter dehumidifier - Google Patents

Control device of the inverter dehumidifier Download PDF

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Publication number
KR20170061935A
KR20170061935A KR1020150167140A KR20150167140A KR20170061935A KR 20170061935 A KR20170061935 A KR 20170061935A KR 1020150167140 A KR1020150167140 A KR 1020150167140A KR 20150167140 A KR20150167140 A KR 20150167140A KR 20170061935 A KR20170061935 A KR 20170061935A
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KR
South Korea
Prior art keywords
temperature
evaporator
region
inverter compressor
inverter
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Application number
KR1020150167140A
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Korean (ko)
Inventor
박정렬
김재덕
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주식회사 대유위니아
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Priority to KR1020150167140A priority Critical patent/KR20170061935A/en
Publication of KR20170061935A publication Critical patent/KR20170061935A/en

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    • F24F11/0015—
    • F24F11/0012—
    • F24F11/0086—
    • F24F11/02—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Gases (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

A control device for an inverter dehumidifier is disclosed. An apparatus for controlling an inverter dehumidifier according to the present invention comprises: an evaporator temperature sensor for sensing a temperature of an evaporator; An inverter compressor for compressing and circulating the refrigerant transferred from the evaporator; And a controller for controlling the number of revolutions and on / off of the inverter compressor to correspond to a plurality of temperature ranges according to an evaporator temperature input from the evaporator temperature sensor.

Description

[0001] CONTROL DEVICE OF THE INVERTER DEHUMIDIFIER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an inverter dehumidifier and, more particularly, to a control device for an inverter dehumidifier that variably controls the number of rotations of a compressor in accordance with temperature and time variation of the evaporator at low load.

In general, a dehumidifier is a device used for lowering the humidity of an indoor space. The dehumidifier is installed in a case that forms an outer shape, a fan installed inside the case and sucking the outside air, and moisture contained in the inhaled air is condensed to remove moisture And a water storage tank in which moisture removed from the dehumidifying means is stored.

Wherein the dehumidifying means includes a compressor for compressing the gaseous refrigerant to a high pressure, a condenser for condensing the high-temperature and high-pressure refrigerant discharged from the compressor, and a low-temperature low-pressure refrigerant discharged from the condenser, And an evaporator which evaporates and evaporates to cool the surroundings.

These dehumidifiers are manufactured using various dehumidifying methods. In most cases, when the air passes through the evaporator by using a refrigeration cycle, the moisture in the air condenses and the surrounding heat is taken away to remove the moisture in the air. Dehumidifiers are widely used.

Therefore, when the air in the indoor space is allowed to pass through the evaporator in the main body, the moisture contained in the air condenses on the surface of the evaporator, thereby dehumidifying. Also, the dehumidified air passes through the condenser to condense the refrigerant passing through the condenser. Since the dehumidified air absorbs heat from the refrigerant of the condenser while passing through the condenser, the air in the indoor space passes through the body, At the same time, the temperature rises.

Generally, since the rotation speed of the compressor is constant by using the constant speed compressor, the dehumidifier can be controlled only to the extent that the compressor is turned on and off according to the cooling load.

Therefore, when the dehumidifier is driven under a low load of low temperature and low humidity, there is a problem that the evaporator is frozen because the temperature of the evaporator is lowered due to the change in the outside temperature. Therefore, there is a problem that the dehumidification efficiency of the dehumidifier is reduced at a low load.

Background Art of the Invention There is a "dehumidifier and its control method ", Korean Patent Laid-Open Publication No. 10-2015-0091681 (published on Aug. 20, 2015).

According to an aspect of the present invention, there is provided a refrigeration system for a refrigerator, including: a refrigerator having a plurality of refrigerators, And to provide a control device for the inverter dehumidifier.

A control method of an inverter dehumidifier according to an aspect of the present invention includes: an evaporator temperature sensor for sensing a temperature of an evaporator; An inverter compressor for compressing and circulating the refrigerant transferred from the evaporator; And a controller for controlling the number of revolutions and on / off of the inverter compressor to correspond to a plurality of temperature ranges according to an evaporator temperature input from the evaporator temperature sensor.

In the present invention, the plurality of temperature zones may include a first zone that is a zone below a first set temperature, a second zone that is a zone that is above the first set temperature and that is below a second set temperature, A third region that is an area below the third set temperature, and a fourth region that is an area that exceeds the third set temperature.

In the present invention, when the evaporator temperature input from the evaporator temperature sensor falls below a second set temperature, the controller enters the freeze prevention mode and controls the inverter compressor to a low RPM.

In the present invention, the controller controls the inverter compressor to be in the OFF state when the evaporator temperature input from the evaporator temperature sensor belongs to the first region.

In the present invention, the controller controls the inverter compressor to at least one of low RPM driving and off driving when the evaporator temperature belongs to at least one of the second region and the third region.

In the present invention, the controller receives the evaporator temperature from the evaporator temperature sensor at preset time intervals.

In the present invention, the control unit resets the set time when the inverter compressor is controlled to be in an off state, and resets the set time when the inverter compressor is controlled to a low RPM .

The controller of the inverter dehumidifier according to an embodiment of the present invention can control freezing of the evaporator by varying the number of rotations of the compressor according to the temperature and time of the evaporator at low load.

Further, the present invention enables efficient dehumidification even under a low load, thereby improving the satisfaction of the user.

Further, by using the inverter compressor, the present invention can positively cope with a change in the load, so that the electric charge can be reduced and the noise can be reduced.

1 is a cross-sectional view illustrating an inverter dehumidifier according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a controller of an inverter dehumidifier according to an embodiment of the present invention. Referring to FIG.
3 to 4 are views for explaining a control method of the inverter dehumidifier according to an embodiment of the present invention.

Hereinafter, an apparatus for controlling an inverter dehumidifier according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a cross-sectional view illustrating an inverter dehumidifier according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating a controller of an inverter dehumidifier according to an embodiment of the present invention. As follows.

1, an inverter dehumidifier 100 according to an embodiment of the present invention includes a main body 110 having an air inlet 110a and an air outlet 110b, And a control unit 130 for controlling the airflow 120. The control unit 130 controls the operation of the air supply unit 120,

The main body 110 further includes a condenser 143 and an evaporator 145 between the air intake port 110a and the airflow fan 120 to remove moisture contained in the air sucked through the air intake port 110a.

The blowing section 120 includes a guide duct 121, a fan 123 and a fan motor 125 so as to make the size of the dehumidifier 100 more slim. The fan 120 blows air inside the guide duct 121 toward the air outlet 110b through the rotation of the fan 123 so that the air outside the dehumidifier 100 is forced into the air inlet 110a. Inhale. In addition, the fan motor 120 is controlled by the control unit 130 in a stable manner.

The cooling system 140 of the dehumidifier 100 according to an embodiment of the present invention will be described. The cooling system 140 includes an inverter compressor 141, a condenser 143, and an evaporator 145 to implement a refrigeration cycle for dehumidification of air. The cooling system 140 includes an inverter compressor 141 installed at a lower portion of the main body 110 and a condenser 143 and an evaporator 145 provided near the upper portion of the main body 110 for heat exchange.

The cooling system 140 compresses the heat exchange medium at a high temperature and a high pressure in the inverter compressor 141 and transfers it to the condenser 143. The condenser 143 condenses the heat exchange medium compressed in the liquid phase, And the coolant is generated by evaporating the heat exchange medium through the condenser 143. That is, the heat exchange medium is circulated through the condenser 143 and the evaporator 145 to cool the evaporator 145, and the outside air of the main body 110, which is forcedly sucked by the air inlet 120a into the air inlet 110a, (145). Then, moisture contained in the air condenses on the surface of the evaporator 145, and dew is formed.

The dehumidified air having passed through the evaporator 145 is sucked into the guide duct 121 of the blowing unit 120 through the condenser 143 and discharged to the air outlet 110b of the main body 110. [

On the other hand, in the process of realizing the refrigeration cycle, when the outside air is in a low load state such as low temperature and low humidity, there is a problem that the temperature of the evaporator is frozen.

The controller of the inverter dehumidifier according to an embodiment of the present invention will be described.

2, the controller of the inverter dehumidifier according to an embodiment of the present invention includes an outdoor temperature sensor 111, an evaporator temperature sensor 145a, a controller 130, a fan motor 125, (141).

The outside temperature sensor 111 detects the outside air temperature of the room air. At this time, the outside air temperature sensor 111 is provided on the side of the air inlet 110a in the main body 110 to accurately detect the temperature of the outside air that has not passed through the condenser 143 and the evaporator 145, Can be measured. Also, a humidity sensor (not shown) may be provided on the side of the outside air temperature sensor 111 to sense the humidity of the outside air.

The evaporator temperature sensor 145a senses the temperature of the evaporator. At this time, the evaporator temperature sensor 145a is provided in the evaporator 145, and a plurality of the evaporator temperature sensors 145a can detect the temperature of the evaporator 145 more accurately, and its position is not limited.

The control unit 130 receives the evaporator temperature from the evaporator temperature sensor 145a and controls the number of rotations and on-off of the inverter compressor 141 to correspond to a plurality of temperature ranges according to the evaporator temperature.

At this time, a plurality of temperature regions are divided into a first region that is a region below the first set temperature, a second region that is a region that exceeds the first set temperature and that is below the second set temperature, And a fourth region that is an area exceeding the third set temperature. Here, the second set temperature may be set to a temperature that is a condition for entering the freeze prevention mode, and the first set temperature may be set to a temperature lower than the first set temperature, and a criterion for controlling the inverter compressor 141 to be in the off state Can be set. Further, the third set temperature may be set to a temperature higher than the second set temperature and a temperature serving as a reference for return control of the inverter compressor 141 to the normal RPM.

For example, the first set temperature may be set at 1 占 폚, the second set temperature set at 5 占 폚, and the third set temperature set at 12 占 폚.

Accordingly, the controller 130 receives the evaporator temperature from the evaporator temperature sensor 145a, and corresponds to each region according to whether the evaporator temperature belongs to the first region, the second region, the third region, or the fourth region So that the inverter compressor 141 can be controlled.

Specifically, after the initial driving of the dehumidifier 100, when the evaporator temperature input from the evaporator temperature sensor 145a falls below the second set temperature, the controller 130 enters the freezing prevention mode and controls the inverter compressor 141 Control with low RPM. Then, the inverter compressor (141) can be maintained at a low RPM continuously until the evaporator temperature falls to the first region. Here, the number of revolutions of the inverter compressor 141 can be set to 2500 RPM.

When the evaporator temperature detected by the evaporator temperature sensor 145a falls to the first region after entering the freeze prevention mode, the controller 130 controls the drive of the inverter compressor 141 to be in an off state. Thereafter, when the evaporator temperature does not reach the third region, the control unit 130 can control the drive of the inverter compressor 141 to be in an off state.

On the other hand, when the evaporator temperature reaches the third region, the control unit 130 can control the inverter compressor 141 at a low RPM.

That is, when the evaporator temperature belongs to at least one of the second region and the third region, the control unit 130 may control the inverter compressor 141 to at least one of low RPM driving and off driving.

In addition, when the evaporator temperature reaches the fourth region, the control unit 130 can return the inverter compressor 141 to the normal RPM, and at the same time, the freeze prevention mode can be released.

Meanwhile, the controller 130 may control the RPM of the fan motor 125 to the set RPM in the freeze prevention mode, and may include a case of driving the inverter compressor 141 at a low RPM and a case of performing an OFF operation . That is, even when the controller 130 turns off the inverter compressor 141, the number of revolutions of the fan motor 125 can be controlled by maintaining the set RPM.

Therefore, when the evaporator temperature is low, the controller 130 can prevent the freezing of the evaporator 145 by controlling the RPM of the fan motor 125 to the set RPM even if the inverter compressor 141 is not driven. In this case, the number of revolutions of the fan motor 125 may be set to 580 RPM in this embodiment.

In addition, the controller 130 can receive the evaporator temperature from the evaporator temperature sensor 145a at preset time intervals. For example, the set time may be set to 5 minutes. This is a time arbitrarily set by experiment, but is not limited thereto.

When the inverter compressor 141 is controlled to be in the off state in the freeze prevention mode, the controller 130 cumulatively counts the set time. When the inverter compressor 141 is controlled at a low RPM, the controller 130 sets the set time Can be reset.

Hereinafter, a method of controlling the inverter dehumidifier according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 to 4 are views for explaining a control method of the inverter dehumidifier according to an embodiment of the present invention, and a control method of the inverter dehumidifier will be described with reference to FIG.

3, when the dehumidifier 100 is powered on, the controller 130 performs an initial startup operation and controls the inverter compressor 141 at a normal RPM (S10).

Next, the control unit 130 receives the evaporator temperature from the evaporator temperature sensor 145a, determines whether the evaporator temperature is satisfied, and controls the rotation speed of the inverter compressor 141 to a low RPM (S20).

At this time, if the evaporator temperature falls below the second set temperature, the controller 130 determines that the freezing prevention mode entry condition is satisfied and controls the rotation speed of the inverter compressor 141 to a low RPM. The number of rotations of the inverter compressor 141 may be set to 2500 RPM.

In step S20, the controller 130 controls the number of rotations and on / off of the inverter compressor 141 so as to correspond to a plurality of temperature ranges according to the evaporator temperature (S30).

At this time, a plurality of temperature regions are divided into a first region that is a region below the first set temperature, a second region that is a region that exceeds the first set temperature and that is below the second set temperature, And a fourth region that is an area exceeding the third set temperature. Here, the second set temperature may be set to a temperature that is a condition for entering the freeze prevention mode, and the first set temperature may be set to a temperature lower than the first set temperature, and a criterion for controlling the inverter compressor 141 to be in the off state Can be set. Further, the third set temperature may be set to a temperature higher than the second set temperature and a temperature serving as a reference for return control of the inverter compressor 141 to the normal RPM.

For example, the first set temperature may be set at 1 占 폚, the second set temperature set at 5 占 폚, and the third set temperature set at 12 占 폚.

Accordingly, the controller 130 receives the evaporator temperature from the evaporator temperature sensor 145a, and corresponds to each region according to whether the evaporator temperature belongs to the first region, the second region, the third region, or the fourth region So that the inverter compressor 141 can be controlled.

That is, when the evaporator temperature input from the evaporator temperature sensor 145a belongs to the fourth region, the control unit 130 controls the inverter compressor 141 to return to the normal RPM (S31) If it belongs to at least one of the second regions, the rotational speed of the inverter compressor 141 is maintained at a low RPM (S32). At this time, the inverter compressor (141) can be maintained at a low RPM until the evaporator temperature falls to the first region. If the evaporator temperature falls to the first region, the inverter compressor (141) is turned off ).

If the inverter compressor 141 is controlled to be in the off state (S33) in step S30, the controller 130 controls the inverter compressor 141 based on the second set temperature (S40). That is, when the evaporator temperature input from the evaporator temperature sensor 145a belongs to the fourth region, the control unit 130 controls the inverter compressor 141 to return to the normal RPM (S41) If so, the inverter compressor 141 is controlled at a low RPM (S42). If the evaporator temperature belongs to at least one of the first region and the second region, the control unit 130 maintains the inverter compressor 141 in the off state (S43).

If it is determined in step S40 that the inverter compressor 141 is in the off state in step S43, the controller 130 controls the inverter compressor 141 based on the second set temperature as in step S40 (step S50) .

4, if the inverter compressor 141 is controlled at a low RPM in step S40, the controller 130 controls the inverter compressor 141 on the basis of the first set temperature (S60).

That is, when the evaporator temperature input from the evaporator temperature sensor 145a belongs to the fourth region, the control unit 130 controls the inverter compressor 141 to return to the normal RPM (S61) If it belongs to at least one of the second regions, the inverter compressor 141 is controlled at a low RPM (S62). In addition, when the evaporator temperature belongs to the first region, the control unit 130 maintains the inverter compressor 141 in the off state (S63).

At this time, the controller 130 can receive the evaporator temperature from the evaporator temperature sensor 145a at preset time intervals. For example, the set time may be set to 5 minutes, which is arbitrarily set by experiment, but is not limited thereto.

When the inverter compressor 141 is controlled to be in the off state in the freeze prevention mode, the controller 130 cumulatively counts the set time. When the inverter compressor 141 is controlled at a low RPM, the controller 130 sets the set time Can be reset.

Accordingly, when the control unit 130 controls the inverter compressor 141 at a low RPM according to the evaporator temperature, the control unit 130 may return to step S30 and perform the same control.

As described above, the controller of the inverter dehumidifier according to an embodiment of the present invention can prevent freezing of the evaporator by variably controlling the number of revolutions of the compressor according to temperature and time of the evaporator at low load.

Further, the present invention enables efficient dehumidification even under a low load, thereby improving the satisfaction of the user.

Further, by using the inverter compressor, the present invention can positively cope with a change in the load, so that the electric charge can be reduced and the noise can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of the present invention should be determined by the following claims.

100: dehumidifier 110:
110a: air inlet port 110b: air outlet port
111: Outside temperature sensor 120:
121: guide duct 123: fan
125: Fan motor 130:
140: cooling system 141: inverter compressor
143: condenser 145: evaporator
145a: Evaporator temperature sensor

Claims (7)

An evaporator temperature sensor for sensing the temperature of the evaporator;
An inverter compressor for compressing and circulating the refrigerant transferred from the evaporator; And
And a controller for controlling the number of revolutions and on / off of the inverter compressor to correspond to a plurality of temperature ranges according to an evaporator temperature input from the evaporator temperature sensor.
The method according to claim 1,
Wherein the plurality of temperature zones comprise:
A first region that is a region that is a region below the first set temperature, a second region that is a region that exceeds the first set temperature and that is equal to or less than the second set temperature, And a fourth region which is an area exceeding the third set temperature.
3. The method of claim 2,
Wherein,
Wherein when the evaporator temperature input from the evaporator temperature sensor falls below a second set temperature, the inverter enters a freeze prevention mode and controls the inverter compressor to a low RPM.
3. The method of claim 2,
Wherein,
And controls the inverter compressor to be in the off state when the evaporator temperature inputted from the evaporator temperature sensor belongs to the first region.
3. The method of claim 2,
Wherein,
Wherein the control unit controls the inverter compressor to at least one of low RPM driving and off driving when the evaporator temperature belongs to at least one of the second region and the third region.
The method according to claim 1,
Wherein,
Wherein the evaporator temperature sensor receives the evaporator temperature from the evaporator temperature sensor at preset time intervals.
The method according to claim 6,
Wherein,
Wherein when the inverter compressor is controlled to be in an off state, the set time is accumulated, and when the inverter compressor is controlled to a low RPM, the set time is reset.










KR1020150167140A 2015-11-27 2015-11-27 Control device of the inverter dehumidifier KR20170061935A (en)

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KR1020150167140A KR20170061935A (en) 2015-11-27 2015-11-27 Control device of the inverter dehumidifier

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KR1020150167140A KR20170061935A (en) 2015-11-27 2015-11-27 Control device of the inverter dehumidifier

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200012244A (en) * 2018-07-26 2020-02-05 엘지전자 주식회사 Dehumidifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200012244A (en) * 2018-07-26 2020-02-05 엘지전자 주식회사 Dehumidifier

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