KR20090038715A - Compressor control device of oxygen generator and control method thereof - Google Patents

Compressor control device of oxygen generator and control method thereof Download PDF

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Publication number
KR20090038715A
KR20090038715A KR1020070104160A KR20070104160A KR20090038715A KR 20090038715 A KR20090038715 A KR 20090038715A KR 1020070104160 A KR1020070104160 A KR 1020070104160A KR 20070104160 A KR20070104160 A KR 20070104160A KR 20090038715 A KR20090038715 A KR 20090038715A
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South Korea
Prior art keywords
compressor
restraint
oxygen generator
preheating
oxygen
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KR1020070104160A
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Korean (ko)
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김종명
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(주)엘고테크
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Priority to KR1020070104160A priority Critical patent/KR20090038715A/en
Publication of KR20090038715A publication Critical patent/KR20090038715A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02—Preparation of oxygen
    • C01B13/0229—Purification or separation processes
    • C01B13/0248—Physical processing only
    • C01B13/0259—Physical processing only by adsorption on solids
    • C01B13/0262—Physical processing only by adsorption on solids characterised by the adsorbent
    • C01B13/027—Zeolites

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)

Abstract

An apparatus of controlling a compressor for an oxygen generator and a method of controlling a compressor for the oxygen generator using the same are provided to improve reliability and use convenience for the oxygen generator. An apparatus of controlling a compressor for an oxygen generator includes a compressor(1), an adsorption part, an oxygen outlet, a control part(4), and a current sensor(30). The current sensor senses restrict current generated in driving of the compressor. The control part determines restrict operation or a steady operation state according to the restrict current. The current sensor includes an operation relay, resistance(R1), a diode(D1), a capacitor(C1), and an optocoupler(Q2). The operation relay is turned on/off according to an operating control signal of the on/off outputted in the control part.

Description

Compressor control device of oxygen generator and control method thereof

The present invention relates to an oxygen generator, and more particularly, to a compressor control technology included in an oxygen generator. The passage of air between an air inlet and an outlet of a compressor or a failure or freezing of a compressor generated in a pressurization process of an oxygen generator. When the restraint of the compressor occurs due to a blockage, etc., it detects the restraint state and adds a preheating function to freeze it.It automatically corrects the fault itself and operates it normally. The present invention relates to an oxygen generator compressor control apparatus and a method of controlling the oxygen generator which have improved reliability and ease of use by stopping an error and warning an error of the compressor.

In general, the oxygen generator is to provide approximately 21% of the oxygen contained in the atmosphere to the user to be supplied to the user, it is possible to use the method of electrolysis of water, the reaction of chemical substances, etc. Hassle of trouble and low stability of the phase.

Therefore, in recent years, an oxygen generator for separating and supplying oxygen by using a method of adsorbing and desorbing oxygen from the atmosphere is mainly used, and FIG. 1 is a schematic configuration diagram of such a conventional oxygen generator.

As shown in FIG. 1, the conventional oxygen generator is configured to compress the suction air filtered through the suction filter F1 to a high pressure state and to force the circulation of the compressor 1, and to promote the operation of the compressor 1. Cooling fan (2) for supplying the supply, connected to the compressor (1) in parallel through two flow paths (piping) (U1) (U2) and filled with an adsorbent (not shown) for adsorbing nitrogen from the air therein. Oxygen outlets connected to the first and second adsorption columns T1 and T2 and the first and second adsorption columns T1 and T2 respectively to discharge oxygen gas separated by the adsorbent to the outside. Include.

At this time, the selector valves V1 and V2 and the drain valve V3 and V4 are respectively provided in the flow paths U1 and U2 connecting the compressor 1 and the first and second adsorption units T1 and T2. And a drain muffler U6 is installed.

In addition, the first and second adsorption parts T1 and T2 are also connected to the oxygen discharge part through a plurality of flow paths U3 and U4 on the output side, and each of the plurality of flow paths U3 and U4 is configured to prevent backflow. Check switches S1 and S2 and an equilibrium valve V5 are provided.

Here, the oxygen discharge unit (Oxygen Container) (T3), the discharge filter (F2), and the humidifier (humidifier) (3) is sequentially configured on one flow path (U5).

That is, when the external air passing through the suction filter F1 is filtered, the oxygen generator is compressed according to the on operation of the compressor 1 driven according to a control operation of a controller (not shown). The compressed external air is selectively supplied to the first adsorption unit T1 and / or the second adsorption unit T2 as the selection valves V1 and / or V2 are opened or closed.

At this time, the nitrogen contained in the pressurized air is adsorbed to the adsorbent (zeolite) provided in the first adsorption unit (T1) or the second adsorption unit (T2) to separate oxygen, and the separated oxygen is above a predetermined pressure. Is stored in the oxygen storage unit T3 through the check switches S1 and / or S2.

The oxygen stored in the oxygen storage part T3 passes through the discharge filter F2 in the flow path U5 and is discharged to the outside via the humidifying part 3.

In addition, the air pressurized by the first adsorption part T1 and / or the second adsorption part T2 is depressurized according to the opening or closing of the drain valves V3 and / or V4 so that nitrogen adsorbed to the adsorption part is drained. It is discharged to the outside through the muffler (U6).

That is, the oxygen generator separates oxygen while adsorbing nitrogen by alternately pressurizing the external air to the first adsorption part T1 and the second adsorption part T2, and the oxygen stored in the oxygen storage container through the separation process as described above. Nitrogen stored and used in T3 and adsorbed to the first and second adsorption units T1 and T2 alternately decompresses the first and second adsorption units T1 and T2, and the first , 2 It is a device to generate and use oxygen by alternately the operation detached and discharged from the adsorption unit (T1) (T2).

However, in recent years, the use of such oxygen generators for medical and air cleaning products has been expanded to use for aquariums (sashimi) or aquaculture farms. It became.

For example, the compressor driving circuit of the conventional oxygen generator is a DC power supply unit 5, a functional control unit 6, an oxygen generator in the winter farm in case the compressor is frozen and the compressor is not driven when the compressor is driven. In the case of including the sensor unit (eg, temperature sensor, pressure sensor, oxygen sensor, etc.) 7 and the display unit 8 required for the control, a separate auxiliary starting capacitor C3 is attached to the control unit at the start of the compressor 1 ( 4) The auxiliary start relay RY2 is turned on to forcibly increase the starting torque by connecting the main start capacitor C2 and the auxiliary start capacitor C3 in parallel.

Then, the controller 4 turns on the compressor operation relay RY1 to start the compressor 1, and then turns off the auxiliary start relay RY2 after a predetermined time elapses. No overcurrent was generated.

This method imposes a strain on the compressor 1 because the starting current at startup is higher than the rating, and also causes safety problems such as rising production costs and overheating. Deaths caused by lack of oxygen in fish farms.

In addition, the auxiliary start capacitor (C3) is attached, the high pressure is applied to the contact point when the auxiliary start capacitor (C3) on contact should use an expensive auxiliary contact relay (RY2), the compressor (1) is off When it is used again, proper discharge time is necessary because of the voltage charged in the auxiliary contact relay (RY2) of the auxiliary start capacitor (C3).

Accordingly, the present invention has been made to solve the above-mentioned problems, and can detect the restraint state of the compressor included in the oxygen generator, and can be used immediately in normal operation, and malfunction of the oxygen generator during operation ( It always detects the failure and restraint of the compressor, blockage of the entire flow path of the oxygen generator, etc., and provides a quick alarm function for malfunction.In the event of malfunction due to freezing of the compressor, the compressor is automatically heated by the restraint current of the compressor for a certain time without damaging the compressor. An object of the present invention is to provide a compressor control device for an oxygen generator having a function of thawing by preheating function and a control method thereof.

Compressor control apparatus for an oxygen generator of the present invention for achieving the above object, in the configuration of a conventional oxygen generator comprising a compressor, an adsorption unit, an oxygen discharge unit, and a control unit, for detecting the amount of restraint current at the start of the compressor Current sensing unit; And preheating the compressor while warming the confined current of the compressor for a predetermined time during the initial operation in the constrained operation state of the compressor, and defrosting the freeze constrained during normal operation. The control unit is configured to determine the restraining operation or the normal operation state of the compressor according to the restraining current amount detected by the current sensing unit to determine the restraint state by the number of preheating times of the compressor in the normal operation so as to be minimized. Characterized in that.

The current sensing unit may include an operation relay turned on / off according to an operation control signal of an on / off output from a controller during an initial operation of the oxygen generator; A resistor for converting a current flowing into a compressor into an AC voltage according to on / off of the operation relay; A diode and a capacitor converting the AC voltage into a DC voltage; In order to be able to discriminate the restraint operation state or the normal operation state of the compressor, an optocoupler which is turned on or off according to the high and low is compared with the DC voltage and the turn-on / turn-off voltage of the transistor by the resistance. do.

The controller may be further configured to determine whether the compressor is restrained from the conversion restraint time of the voltage waveform of the restraint detection stage that converts the restraint time of the compressor at initial startup.

In addition, the control unit opens the process valves attached to the compressor and the adsorption tank to minimize the load caused by the re-compression of the compressor and to immediately start the compressor without waiting time to determine the restraint state after determining the restraint state of the compressor When it is characterized in that for outputting a control signal to reduce the pressure inside the compressor and the adsorption tank.

In addition, the compressor error alarm is characterized in that the warning sound generated through the light emission or buzzer of the lamp through the display.

In addition, as a compression control method implemented by the compression control device of the oxygen generator, when the operation signal is transmitted after the power is supplied to the oxygen generator, the process valve of the oxygen generator with the initial operation bit set to "0" A first step of selectively controlling on / off for the first; A second step of turning on the compressor by turning on the compressor operation relay while lowering the compressor driving stage; If the restraint time is less than the preset preheating time, the compressor is considered to be in normal operation, and the preheating frequency is set to " 0 " and the initial operation bit is changed to " 1 " Or alternately reducing the pressure to adsorb nitrogen and generate concentrated oxygen, and then discharge it to the outside; If the restraint time is greater than the preheating time during the initial operation (initial operation bit is "0" state) in the third step, it is regarded as being restrained and the compressor is turned off and the process valve is opened to improve the starting characteristics of the compressor. A fourth step of increasing the number of preheating times for the initial operation of the compressor after reducing the internal pressure of the adsorption tank; If the compressor is defrosted due to the increase in the number of preheating times, if the restraint does not occur, the preheating frequency is set to "0" and normal oxygen generator operation is continued. If the defrosting does not occur, the compressor is not restrained by freezing. A fifth step of generating a compressor error alarm by recognizing a failure due to a blockage in the overall flow path of the oxygen generator; And if the restraint of the compressor is generated during the normal operation (initial operation bit is "1") in the fifth step, determine whether to restrain the preheating frequency of the compressor during the normal operation. A sixth step of generating an error alarm; Proceeds.

Further, in consideration of the allowable temperature of the compressor, the number of preheating of the compressor in the normal operation is set to be smaller than the number of preheating in the initial operation of the compressor, and the preheating time gives a sufficient time to defrost the freezing state of the compressor. It is done.

The present invention can reduce the pressure inside the compressor by using a single starting capacitor when the overload due to the increase in the internal pressure of the compressor or the overload due to the freezing of the compressor without using a plurality of capacitors, or as a restraint current. By defrosting the compressor to operate normally, it is possible to prevent damage to the quality caused by the compressor by forcibly increasing the starting current of the compressor by using a plurality of capacitors, which is the conventional method, and continuously detects it with such a function. Or alarmed immediately after a normal operation, and immediately detects malfunctions and enables immediate use without the waiting time (several to several tens of seconds) after the product's stop function. It is possible to obtain the effect of greatly improving the driving method of the conventional compressor such as the improvement. .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 3 shows a schematic circuit diagram of the compressor control method of the oxygen generator according to an embodiment of the present invention, a, b, c, d of Figure 4 is an embodiment of the present invention when the compressor is in a normal starting state Figure 5 shows a voltage waveform for controlling the compressor of Figure 5, a, b, c, d in Figure 5 shows the voltage waveform for heating the compressor for a certain time by detecting the restraint state of the compressor in an embodiment of the present invention Figure 6 shows a schematic control flow diagram for the compressor control method of the oxygen generator according to an embodiment of the present invention.

Oxygen generator according to an embodiment of the present invention, as shown in Figure 1 attached to, as shown in Figures 3 to 6, the compressor (1) for compressing and supplying the external air is sucked, the external compressed by the compressor (1) Adsorption unit (T1, T2) for adsorbing nitrogen to separate oxygen from air, oxygen discharge unit for discharging oxygen separated from the adsorption unit (T1, T2) to the outside, and the system in the oxygen generator configured as described above And a control unit 4 for controlling each unit.

In more detail, as shown in FIG. 1, as shown in FIGS. 3 to 6, the initial operation state of the oxygen generator is controlled by the controller 4 when the on-operation control signal (Comp stage of Low) of the compressor is transmitted. Operation relay RY1 is turned on to apply a power supply AC220V to the compressor, and a current flowing through the compressor 1 is converted into an AC voltage VA by a resistor R1. VA is converted back to DC voltage VB by diode D1 and capacitor C1.

At this time, when the DC voltage VB is higher than the turn-on / turn-off voltage Vt of the transistor Q1 by the resistor R2 and the resistor R3, the optocoupler Q2 is turned on to turn on the controller ( The voltage (VC) of the compressor restraint detection stage (Lock) of 4) is high, indicating that the compressor 1 is restrained.

In addition, when the DC voltage VB is lower than the turn-on / turn-off voltage Vt of the transistor Q1 by the resistor R2 and the resistor R3, the optocoupler Q2 is turned off. Therefore, the voltage VC of the compressor restraint detection terminal Lock of the controller 4 is low by the resistor R5, so that it is possible to determine whether the compressor 1 is normally operated.

Typically, as shown in FIGS. 4 and 5, the compressor 1 flows a restraint current VAS until the compressor 1 is driven (ts section), and the compressor 1 operates (tN section). When the normal operating current (VAR) flows.

If the compressor 1 continues to be constrained, the restraint voltage VAS is continuously generated in the resistor R1, and the voltage Vc is continuously maintained as shown in FIG. 5D.

In this principle, the control unit 4 turns on the compressor 1 and converts the restraint time tH of the voltage waveform Vc of the lock detection stage Lock, which converts the lock time ts of the compressor 1 at initial startup. It can be determined by deduction by analogy with).

Referring to the operation of the oxygen generator of the present invention by applying the method of determining whether the compressor 1 is restrained by the oxygen generator operation flowchart of FIG.

When power is supplied to the oxygen generator and the operation signal is transmitted to the control unit 4 by the function control unit 6, the control unit 4 moves to the valve control stages Valve1 to Valve5 with the initial operation bit set to "0". After the process valves V1 / V4 shown in FIG. 1 are turned on and the process valves V2 / V3 are turned off, the compressor driving stage Comp is low to turn on the compressor operation relay RY1.

Then, the compressor 1 is turned on from the compressor operation relay RY1, the adsorption tank T1 is pressurized, and nitrogen is adsorbed to the zeolite of the adsorption tank T1 to produce concentrated oxygen. (U3), stored in the oxygen storage tank (T3) through the check switch (S1), the adsorption tank (T2) is decompressed at the same pressure with the external air, the nitrogen adsorbed to the zeolite of the adsorption tank (T2) flow path (U6) Will be sent out via.

After the above process, the control unit 4 outputs a control signal for turning on the process valves V2 / V3 and turning off the process valves V1 / V4 through the valve control stages Valve1 to Valve5.

The adsorption tank T2 is pressurized to allow nitrogen to be adsorbed to the zeolite of the adsorption tank T2 to produce concentrated oxygen.

At this time, the concentrated oxygen is stored in the oxygen storage tank (T3) through the flow path (U4), the check switch (S2), the adsorption tank (T1) is reduced to the same pressure with the external air to the zeolite of the adsorption tank (T1) Nitrogen adsorbed on is sent to the outside through the flow path U6.

That is, by alternately pressurizing and depressurizing the adsorption tank T1 and the adsorption tank T2, it is possible to continuously supply oxygen to the oxygen storage tank T3.

At this time, if the restraint time tH is smaller than the preheating time tHF set in FIG. 5D when the compressor 1 is turned on, the compressor 1 is considered to be in normal operation, and the controller 4 reads the number of preheating times. "," And also set the initial operation bit to "1", and then pressurize or depressurize the adsorption tank (T1 or T2) alternately to continue normal oxygen generator operation.

On the other hand, if the restraint time tH is greater than the preheating time tHF during the initial operation (initial operation bit is "0" state), the controller 4 considers that the compressor 1 is restrained and the compressor 1 ), The process valves V1, V2, V3, and V4 shown in FIG. 1 are opened to depressurize the internal pressure of the compressor 1 and the adsorption tanks T1 and T2 in order to improve the starting characteristics of the compressor 1. Then increase the number of preheats for the compressor (1).

Here, the compressor 1 is already heated (preheated) once by the preheating time tHF through the restraint current.

Therefore, if the compressor 1 is thawed while heating the above process for several times and no restraint occurs, the preheating frequency is set to "0" and normal oxygen generator operation is continued again. Knowing that the failure is caused by a failure of the compressor 1 or a blockage in the overall flow paths U1 to U6 of the oxygen generator, the controller 4 may display the display unit through the buzzer or the lamp driving stages DSP1 to DSP5. Compressor error alarms are generated such as the light emitted by the lamp 8 or the output of a warning sound by the buzzer.

On the other hand, when the restraint of the compressor 1 is generated during the normal operation (the initial operation bit is "1"), the control unit 4 has no preheating frequency A of the compressor 1 during the normal operation. If it is determined to be restrained, if it is restrained, the process valves V1, V2, V3, and V4 are closed and controlled, while the buzzer or the alarm sound of the lamp is emitted by the display unit 8 through the lamp driving stages DSP1 to DSP5. Compressor error alarm is generated as the output of.

At this time, in consideration of the allowable temperature of the compressor 1, the preheating frequency A of the compressor 1 in the normal operation is set to be smaller than the preheating frequency B of the compressor 1 in the initial operation, and the preheating time tHF. Is preferably set to a value of 2 seconds or more but less than 20 seconds, which is a sufficient time to thaw the frozen state of the compressor (1).

Here, in FIG. 4 and FIG. 5, the non-explained reference numeral tR is a transient time at which the compressor operates normally at startup, tN is a period in which the compressor operates normally, and tH is a start time when the compressor operates normally ( Or preheating time).

Hereinafter, the present invention is not limited to the above specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes are within the scope of the claims.

1 is a block diagram of an oxygen generator.

2 is a schematic circuit diagram of an oxygen generator according to a conventional embodiment.

3 is a schematic circuit diagram of an oxygen generator according to an embodiment of the present invention.

4 is a, b, c, d is the voltage waveform of each part in the steady state of the compressor in an embodiment of the present invention.

5 is a, b, c, d is a control voltage waveform diagram for each part in the restrained state of the compressor in an embodiment of the present invention.

6 is a control flow diagram of an oxygen generator according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

One ; Compressor 4; Control

30; Current sensing units T1 and T2; Adsorption tank

Claims (8)

In constructing a conventional oxygen generator comprising a compressor, an adsorption unit, an oxygen discharge unit, and a control unit, A current sensing unit for sensing the amount of restraint current when the compressor is started; And including In the restraint operation state of the compressor, during the initial operation, the compressor is preheated while the restraint current is turned on for a predetermined time to thaw during freezing restraint, and during normal operation, the heat generation due to pressurization of the compressor is minimized. The control unit determines the restraining operation or normal operation state of the compressor according to the restraining current amount sensed by the current sensing unit to determine the restraint state by the compressor preheating frequency during operation. Compressor controller for oxygen generator. The method of claim 1, wherein the current sensing unit An operation relay turned on / off according to an operation control signal of an on / off output from a controller during an initial operation of the oxygen generator; A resistor (R1) for converting a current flowing into the compressor into an AC voltage according to the on / off of the operation relay; A diode (D1) and a capacitor (C1) for converting the AC voltage into a direct current voltage (VB); In order to be able to discriminate between the restraint operation state or the normal operation state of the compressor, the turn-on / turn-off voltage (Vt) of the transistor Q1 by the DC voltage VB and the resistors R2 and R3 is compared with the high and low values. Compressor control device for an oxygen generator, characterized in that the optocoupler (Q2) is turned on or off according to the circuit configuration. The method of claim 1, And the controller is configured to determine whether the compressor is restrained from the conversion restraint time of the restraint detection stage voltage waveform which converts the restraint time of the compressor at initial startup. The method of claim 1, The control unit opens the process valves attached to the compressor and the adsorption tank so that the compressor is immediately driven without waiting time while minimizing the load caused by the compressor restarting. And a control signal for reducing the pressure in the compressor and in the suction tank when the restraint state is determined after the restraint state of the compressor is determined. The compressor control apparatus of claim 1, wherein the compressor error alarm is a warning sound generated through light emission or a buzzer of a lamp through a display unit. A first step of selectively controlling on / off of the process valve of the oxygen generator with the initial operation bit set to zero (0 ") when the operation signal is transmitted after the power is supplied to the oxygen generator; A second step of turning on the compressor by turning on the compressor operation relay while lowering the compressor driving stage; If the restraint time is smaller than the preset preheating time, the compressor is considered to be in normal operation, and the preheating frequency is set to "0", and the initial operation bit is changed to "1". A third step of alternately pressurizing or depressurizing to adsorb nitrogen and generate concentrated oxygen and then discharge it to the outside; If the restraint time is greater than the preheating time during the initial operation (initial operation bit is "0" state) in the third step, it is regarded as being restrained and the compressor is turned off and the process valve is opened to improve the starting characteristics of the compressor. A fourth step of increasing the preheating frequency (B) for the initial operation of the compressor after reducing the internal pressure of the adsorption tank; If the compressor is thawed due to the increase in the preheating frequency B and the restraint does not occur, the preheating frequency B is set to "0" and normal oxygen generator operation is continued again. A fifth step of generating a compressor error alarm by recognizing that the failure is caused by a failure of the compressor or a blockage in the overall flow path of the oxygen generator; And, In the fifth step, if the restraint of the compressor is generated during the normal operation (initial operation bit is "1"), it is determined whether to restrain the preheating number A of the compressor during the normal operation. A sixth step of generating a compressor error alarm; Compressor control method for an oxygen generator, characterized in that proceeding to. The method of claim 6, Compressor preheating frequency (A) in the normal operation in consideration of the allowable temperature of the compressor is set to less than the preheating frequency (B) during the compressor initial operation. 7. The compressor control method according to claim 6, wherein the preheating time of the compressor is given a time in the range of several seconds to several tens of seconds to thaw the freezing state of the compressor.
KR1020070104160A 2007-10-16 2007-10-16 Compressor control device of oxygen generator and control method thereof KR20090038715A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190007996A (en) * 2017-07-14 2019-01-23 (주)옥서스이앤씨 Small PSA oxygen generator for Raw Fish Restaurant
CN110762742A (en) * 2019-10-18 2020-02-07 Tcl空调器(中山)有限公司 Air conditioner control method and device, air conditioner and storage medium
CN117970970A (en) * 2024-03-15 2024-05-03 中山清匠电器科技有限公司 Vpsa mode-based oxygen-making oil-free compressor and control system thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190007996A (en) * 2017-07-14 2019-01-23 (주)옥서스이앤씨 Small PSA oxygen generator for Raw Fish Restaurant
CN110762742A (en) * 2019-10-18 2020-02-07 Tcl空调器(中山)有限公司 Air conditioner control method and device, air conditioner and storage medium
CN110762742B (en) * 2019-10-18 2021-07-02 Tcl空调器(中山)有限公司 Air conditioner control method and device, air conditioner and storage medium
CN117970970A (en) * 2024-03-15 2024-05-03 中山清匠电器科技有限公司 Vpsa mode-based oxygen-making oil-free compressor and control system thereof

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