KR101678311B1 - Temperature Adjusting Apparatus for Mold With Automatic Scale Removing Function and the Method Using thereof - Google Patents

Temperature Adjusting Apparatus for Mold With Automatic Scale Removing Function and the Method Using thereof Download PDF

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Publication number
KR101678311B1
KR101678311B1 KR1020150119336A KR20150119336A KR101678311B1 KR 101678311 B1 KR101678311 B1 KR 101678311B1 KR 1020150119336 A KR1020150119336 A KR 1020150119336A KR 20150119336 A KR20150119336 A KR 20150119336A KR 101678311 B1 KR101678311 B1 KR 101678311B1
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KR
South Korea
Prior art keywords
medium
temperature
mold
line
solenoid valve
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KR1020150119336A
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Korean (ko)
Inventor
이수
박성수
한진수
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주식회사 어코드시스템
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/70—Maintenance
    • B29C33/72—Cleaning

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The present invention relates to a mold temperature control apparatus and a method thereof including a function of automatically removing a scale, and includes heating means for heating a medium, which is connected by a mold and a supply line and a recovery line, An auxiliary tank connected to the first medium discharge line for discharging the medium to the outside and the medium inflow line for supplying the medium from the outside, and a heater tank installed in the middle of the recovery line for supplying heat to the mold, A pump provided on the recovery line between the heater tank and the auxiliary tank for enforcing circulation of the medium, a first electronic control unit installed on the first medium discharge line and controlling on / off of the first medium discharge line, A valve is provided on a second media discharge line connected to the media outlet of the heater tank and integral with the first media discharge line, A second temperature sensor for sensing a temperature of the medium or the metal mold, and a second temperature sensor for detecting a temperature of the medium inlet A cold water control for controlling the temperature of the mold by controlling the flow rate of the medium from the outside through the line and the discharge amount of the medium to the outside via the medium discharge line or the hot water control for controlling the temperature of the mold by turning on / The controller controls the temperature of the mold by selectively turning on the second solenoid valve and the pump for a predetermined period of time during the start of the process, After forced ejection through the media discharge line, control of the temperature of the mold is started.

Description

TECHNICAL FIELD [0001] The present invention relates to a mold temperature adjusting apparatus and a mold temperature adjusting method,

The present invention relates to a mold temperature regulating device, and more particularly, to a mold temperature regulating device including a function of automatically removing a scale generated in a component in a device and a method thereof.

In the case of an apparatus disclosed in, for example, Registration No. 10-1330525, in which a ground temperature is used as a medium, a mineral temperature such as calcium, magnesium, or calcine contained in groundwater, (scale), which grows into a scale lump by the rust from the mold.

   These scale masses adhere to components inside the machine, such as heater tanks and piping lines, pumps, solenoid valves, etc., as they flow along the flow of the medium through the circulation line, thereby interfering with the function of the components. Particularly, when the scale lumps are fixed to the surface of the heating means (heating heater) in the heater tank, the heating efficiency of the heating means is lowered and excessive power is supplied to the heating means in excess of the normal power for raising the medium to the set temperature. Resulting in overheating. On the other hand, when the scale block is formed in the pump, it causes wear of the pump seal. If the scale block is formed in the solenoid valve, the valve becomes inoperable. If the block is formed in the pipe, the pipe obstructs the flow of the medium, By the temperature control command, the heated medium in the heater tank can not be quickly transferred to the mold, thereby reducing the efficiency of the apparatus.

Considering the problem of scale formation in the mold temperature control apparatus using the ground water to control the temperature of the mold, it is considered that the use of the organic material in which scale is hardly generated by using oil as the heat medium of the mold temperature control apparatus It is possible.

However, when the oil is heated, the oil used as the medium evaporates from the high temperature into the air in the form of oil, which is then discharged out of the machine and dispersed. As a result, the oil adheres to the surface of the product to cause defective products. It can be invaded and stuck to cause trouble. In addition, the spilled oil gives a heavy oil smell to the workers working in the work space and harms the human body, which makes the work environment worse.

In addition, in the case of the on-stream, it is much more economical to use the groundwater because it is necessary to supplement the machine with expensive medium oil periodically.

Also, in the case of an oil used as an organic medium, the thermal conductivity is about 6 times lower than that of water. Therefore, in order to maintain the temperature of the mold by a low-temperature oil, Therefore, it is difficult to mass-produce the product due to a large number of machine residuals due to the high-temperature heat medium.

  The present inventors have recognized such conventional problems and have come up with a new technology that can fundamentally solve the scale generation problem of the mold temperature control device while using the ground water as it is without changing the heating medium to another.

Registration No. 10-1330525 (Announced on November 18, 2013)

It is an object of the present invention to provide a mold temperature control apparatus using groundwater as a heating medium, in which scales are moved through a circulation line due to impurities contained in ground water or rust generated in a mold to form scale lumps, The present invention is to provide a mold temperature control apparatus including a scale automatic cancellation function configured to enable a scale removal line to be automatically started at startup in order to solve the problem at the source. Other objects of the present invention can be achieved by the detailed description of the present invention described with reference to the accompanying drawings.

In order to achieve the above object, the mold temperature adjusting apparatus including the automatic scale removing function of the present invention comprises a mold 10, a heating means (not shown) connected by a supply line 22 and a collecting line 24, (100) for providing heat to the mold by circulation of the medium, the heating tank (100) comprising: a heater (110); An auxiliary tank 200 installed in the middle of the recovery line 24 and connected to a medium inflow line 32 for inflowing the medium from outside and a first medium ejection line 34 for ejecting the medium to the outside; A pump 300 installed on a recovery line connecting the lower portion of the heater tank 100 and the lower portion of the auxiliary tank 200 to force circulation of the medium; A first solenoid valve (400) installed on the first medium discharge line (34) to control ON / OFF of the first medium discharge line; A second media discharge line (36) connected to a media discharge port formed below the heater tank (100) and integrated with the first media discharge line (34); A second solenoid valve (500) installed on the second medium discharge line (36) to control on / off of the second medium discharge line; A temperature sensing unit 600 for sensing the temperature of the medium or the mold; And the first electromagnetic valve 400 and the pump 300 are turned on / off according to the change in the sensed temperature sensed by the temperature sensing unit 600, A cold water control for controlling the temperature of the mold by controlling the amount of the inflow of the medium and the discharge amount of the medium to the outside through the first medium discharge line 34 or the control of the temperature of the mold by turning on and off the heating means 110 The control unit 700 controls the temperature of the mold by selectively performing the hot water control so that the second solenoid valve 500 and the pump 300 are operated for a predetermined period of time during the startup process, And the scale generated in the heater tank 100 is forcibly discharged through the second medium discharge line 36 and then the temperature control of the mold is started.

According to another aspect of the present invention, there is provided a method for controlling a mold temperature by a mold temperature adjusting apparatus including an automatic scale removing function, comprising the steps of: a) turning on the second solenoid valve and the pump for a predetermined time at start- B) forcing the heating means and the pump to raise the temperature of the medium; c) turning off the heating means to turn off the temperature of the medium And d) turning on / off the first solenoid valve and the pump to control the amount of the medium inflow from the outside through the medium inflow line and the amount of the medium outflow through the medium ejection line, Or a hot water control for controlling the temperature of the mold by turning on / off the heating means is selectively performed, And controlling the current temperature of the mold to follow a predetermined temperature.

Here, preferably, the method may further include a step of turning on the first solenoid valve and the pump to remove air before and after the step a), respectively, for a predetermined time.

According to the mold temperature adjusting device including the automatic scale removing function of the present invention, the scale discharge line is formed by the operation of the second solenoid valve and the pump that are automatically turned on at the time of starting, thereby the auxiliary tank, the pump, As the water flows through it, the scale included in the component can be removed to the outside through the second media discharge line along the flow of water. Therefore, it is not necessary for the operator to carry out separate work such as pipe separation for removing the scale, and the control section automatically performs the descaling process at every startup or at regular intervals, so that the life of the mold temperature control device is extended, Thereby further enhancing the quality of the image.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a schematic configuration of a mold temperature adjusting apparatus including an automatic scale removal function according to an embodiment of the present invention; FIG.
FIG. 2 is an exemplary view showing an example in which a mold temperature adjusting device including an automatic scale removing function according to an embodiment of the present invention constructs a scale removal line; FIG.
3 is a flowchart illustrating a mold temperature control method by a mold temperature control apparatus including an automatic scale removal function according to an embodiment of the present invention; And
FIG. 4 is a graph of the change in mold temperature, which is adjusted according to the method of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical meanings and concepts of the present invention.

FIG. 1 is a block diagram showing a schematic configuration of a mold temperature adjusting apparatus including an automatic scale removing function according to an embodiment of the present invention. Referring to FIG. 1, the mold temperature control apparatus including the automatic scale removal function of the present invention includes a heater tank 100, an auxiliary tank 200, a pump 300, a first solenoid valve 400, (500), a temperature sensing unit (600), and a controller (700).

The heater tank 100 includes heating means 110 connected to the mold 10 by a supply line 22 and a recovery line 24 for heating the medium so that the mold 100 10 to provide heat for injection.

The auxiliary tank 200 is installed in the middle of the recovery line 24 and is connected to a medium inflow line 32 for inflowing the medium from outside and a first medium ejection line 34 for ejecting the medium to the outside .

The pump 300 is installed on a recovery line 24 between the heater tank 100 and the auxiliary tank 200 to force circulation of the medium. That is, in general, the pump 300 is configured to operate when the medium is forced from the medium inflow line 32 or when the medium is forced to be ejected to the medium ejection line 34, 1 solenoid valve 400 is operated.

The first solenoid valve 400 is installed on the first medium discharge line 34 to control on / off of the first medium discharge line 34. As will be described later, the first solenoid valve 400 controls the temperature of the mold according to the cold water control. At this time, the solenoid valve 450 may be installed in the medium inflow line 32 to perform cold water control have. When the first medium discharge line 34 is turned on / off, the pump 300 is also turned on and off together with the discharge of the medium to turn on / off the cold water. In the following description of the "on / off state of the first solenoid valve 400" for cold water control, the concept of "on / off of the pump 300" for forcing the flow of the fluid through the first solenoid valve 400 It should be understood that it includes both.

The second solenoid valve 500 is mounted on a second media discharge line 36 connected to the media outlet of the heater tank 100 and integral with the first media discharge line 34, And controls the on / off of the line 36.

The temperature sensing unit 600 senses the temperature of the medium or the mold, for example, in the heater tank 100 in FIG. However, in order to monitor the temperature of the medium more precisely, it may be installed in the auxiliary tank 200, and in some cases, it may be installed only in the auxiliary tank 200. Also, in order to monitor the temperature of the mold, a temperature sensing unit may be provided on the mold side to monitor the temperature of the mold in real time.

The control unit 700 turns on / off the first solenoid valve 400 according to the change in the sensed temperature sensed by the temperature sensing unit 600, The cold water control for controlling the temperature of the mold 10 by controlling the inflow amount and the medium discharge amount to the outside through the first medium discharge line 34 or the cold water control for controlling the temperature of the mold 10 by turning on / The temperature of the mold is controlled by selectively performing the hot water control for controlling the temperature of the mold. The cold water control or the hot water control is generally performed through the P.I.D control method. In order to converge to the set temperature, it is not necessary to use only the PI control, and the mold temperature is controlled to the set temperature by various control methods.

The control unit 700 turns on the second solenoid valve 500 and the pump 300 for a predetermined period of time in a startup process before the temperature of the mold 10 is controlled to the set temperature, The scale generated in the mold 100 is forcibly discharged through the second medium discharge line 36 and then the temperature control of the mold 10 is started. As described above, in the case of the mold temperature control device using ground water, the scale due to the impurities contained in the ground water or the rust component generated by the corrosion of the medium supply path inside the mold flows along the circulation line of the medium, In the case of the present invention, during the predetermined period of time before the temperature control of the mold is performed, as shown in Fig. 2, the medium inflow line 32 The scale removal line for removing scale, which is connected to the auxiliary tank 200, the pump 300, the heater tank 100 and the second medium discharge line 36, , The second solenoid valve 500 and the second solenoid valve 500 can be automatically operated in accordance with a command of the controller 700, The scale 300 existing in the heater tank 100, the pump 300, and the auxiliary tank 200 is discharged to the outside. On the other hand, in order to construct a scale removal line for effective scale removal, it is preferable that the first electromagnetic valve 400 is maintained in the off state. Therefore, as shown in FIG. 2, by allowing the medium flowing into the auxiliary tank 200 to flow in one direction toward the pump 300, a stronger flow can be formed and the scale inside the apparatus can be effectively removed.

The present invention may further include a display unit for displaying contents of the operation of the control unit 700 and an operation panel for receiving an operator's input. The operation panel may include a touch input on a display screen.

In addition, in the embodiment of the present invention, a manual button for turning on / off the second solenoid valve 500 may be provided on the operation panel. Therefore, the second solenoid valve 500 can be turned on / off at any time by the manual button so that the second solenoid valve 500 can be turned on at any time to remove the scale. Further, when the heating means needs to be replaced or repaired, the second electromagnetic valve is turned off so that the flow of the medium can be shut off until replacement or repair is completed. In addition, it is preferable that the second solenoid valve 500 is turned on and the first solenoid valve 400 is turned off at the same time, even if the scale is manually removed during the stop of the apparatus in addition to the start-up process of the apparatus. And the pump ON operation can be performed by one button, for example, a scale removal button. Further, as will be described later, in order to more effectively remove the scale, it is preferable to allow the medium to flow through the scale removal line in a state in which the medium is filled in the circulation line, and in the descaling process, the medium of the circulation line escapes to the outside After the descaling process is finished, it is necessary to fill the circulation line again with sufficient medium . Therefore, when the scale removal button is pressed, first, the first solenoid valve 400 is turned on and the second solenoid valve 500 is turned off to fill the circulation line for a predetermined time , It is also possible to provide a one-touch scale-release operation button for causing the first solenoid valve 400 to be turned on again and the second solenoid valve 500 to be turned off for a predetermined time after performing the operation for the predetermined time . The set time may be set so that the optimal scale can be removed in accordance with the empirical rule or the characteristics of the apparatus.

3 is a flowchart illustrating a mold temperature adjusting method by a mold temperature adjusting apparatus including an automatic scale removing function according to an embodiment of the present invention. Referring to FIG. 3, in another aspect of the present invention, there is provided a method for controlling a mold temperature by a mold temperature adjusting apparatus including an automatic scale removing function, comprising the steps of: a) B) forcibly raising the temperature of the medium by turning on the heating means and the pump, c) turning off the heating means by turning off the heating means And d) turning on / off the first solenoid valve so as to control the amount of the medium inflow from the outside through the medium inflow line and the amount of the medium outflow to the outside through the medium ejection line, The cold water control for controlling the temperature or the hot water control for controlling the temperature of the mold by turning on / off the heating means is selectively performed to change the current temperature of the mold And a step of controlling according to go to a predetermined temperature.

The step a) is a step of removing the scale, turning on the second solenoid valve 500 and the pump 300 and further turning off the first solenoid valve 400 to remove the scale from the heater tank 100, Scale existing in the pump 300 and the auxiliary tank 200 can be effectively removed by the flow of the medium and discharged through the second medium discharge line 36 to the outside.

The steps b) and c) are steps for heating the medium and stabilizing the temperature of the medium by the heater as a pre-stage for controlling the mold temperature, and then, by controlling the temperature of the mold 10 through a full- It can be quickly and accurately raised to the set temperature. The temperature control step of step d) may raise the temperature to a desired set temperature by various mechanisms including PI control.

Here, preferably, the method may further include the step of turning on the first solenoid valve 400 to remove air before and after the step a) for a predetermined time. As described above, it is preferable that the circulation line is sufficiently filled with the medium for effective descaling, so that the first electromagnetic valve 400 is turned on and the groundwater is sufficiently introduced through the medium inflow line 32, The air is completely removed so that the circulation line can only be sufficiently filled by the medium . After the circulation line is filled with the medium, the scale removal step is performed. In the scale removal process, the medium of the circulation line is discharged to the outside much. Therefore, the air removal step for supplying the medium for controlling the mold temperature again I do.

FIG. 4 is a graph of the change in mold temperature, which is adjusted according to the method of FIG. 4, the air removing step in (A), the descaling step (B), the air removing step (C), and the heating means (110) The temperature is stabilized by turning off the heating means 110 at (E), and the temperature control by the pump 300 and the heating means 110 on / off by (F) 400 is turned on / off to cool the mold to a set temperature by performing a full-scale temperature control process.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various modifications can be made by those skilled in the art. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It will not.

10: mold 100: heater tank
110: heating means 200: auxiliary tank
300: pump 400: first solenoid valve
500: second electromagnetic valve 600: temperature sensing unit
700:

Claims (3)

And a heating means (110) connected to the mold (10) by a supply line (22) and a recovery line (24) for heating the medium, the heater tank (100);
An auxiliary tank 200 installed in the middle of the recovery line 24 and connected to a medium inflow line 32 for inflowing the medium from outside and a first medium ejection line 34 for ejecting the medium to the outside;
A pump 300 installed on a recovery line connecting the lower portion of the heater tank 100 and the lower portion of the auxiliary tank 200 to force circulation of the medium;
A first solenoid valve (400) installed on the first medium discharge line (34) to control ON / OFF of the first medium discharge line;
A second media discharge line (36) connected to a media discharge port formed below the heater tank (100) and integrated with the first media discharge line (34);
A second solenoid valve (500) installed on the second medium discharge line (36) to control on / off of the second medium discharge line;
A temperature sensing unit 600 for sensing the temperature of the medium or the mold;
The first electromagnetic valve 400 and the pump 300 are turned on and off according to the change in the sensed temperature sensed by the temperature sensing unit 600 so that the medium from the outside through the medium inflow line 32 A cold water control for controlling the temperature of the mold by controlling an inflow amount and a medium discharge amount through the first medium discharge line 34 or a hot water control for controlling the temperature of the mold by turning on / A control unit 700 for controlling the temperature of the mold by selectively performing control;
A display unit for displaying contents of the operation of the controller 700; And
An operation panel including an operation button for starting the apparatus;
/ RTI >
The control unit 700 turns on the second solenoid valve 500 and the pump 300 for a predetermined time while keeping the first solenoid valve 400 off during the starting process, A scale removal line leading to the first tank 32, the auxiliary tank 200, the pump 300, the heater tank 100, and the second medium discharge line 36 is formed in the heater tank 100, The scale is controlled to be discharged through the second medium discharge line 36, the temperature control of the mold is started,
The operation panel includes a scale removal button for manually turning off the first solenoid valve 400 and turning on the second solenoid valve 500 and the pump 300 at any time to remove the scale, And then the operation of the first solenoid valve 400 and the second solenoid valve 500 is performed again for a predetermined time so that the circulating line is filled again with the medium And a one-touch scale removing button.
A mold temperature control method for controlling a mold temperature by a mold temperature control apparatus including an automatic scale removal function according to claim 1,
a) forcibly discharging the scale generated in the heater tank through the second medium discharge line by turning on the second solenoid valve and the pump for a predetermined time at the start time;
b) raising the temperature of the medium by turning on the heating means and the pump;
c) stabilizing the temperature of the medium by turning off the heating means; And
d) cold water control for controlling the temperature of the mold by controlling the flow rate of the medium from the outside through the medium inlet line and the amount of the medium discharge to the outside through the medium discharge line by turning on / off the first solenoid valve and the pump, Or selectively controlling the temperature of the mold by turning on / off the heating means to control the current temperature of the mold to follow a predetermined temperature;
Wherein the mold temperature adjusting method comprises:
3. The method of claim 2,
Further comprising the step of turning on the first solenoid valve and the pump to remove air for a predetermined time before and after the step a).
KR1020150119336A 2015-08-25 2015-08-25 Temperature Adjusting Apparatus for Mold With Automatic Scale Removing Function and the Method Using thereof KR101678311B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101873241B1 (en) * 2018-02-27 2018-07-04 (주)애니텍 Temperature Adjusting Apparatus for Mold Having High Temperature Control and Scale Removal Function
KR102264405B1 (en) * 2021-03-10 2021-06-14 (주)애니텍 Mold Temperature Adjusting Apparatus Using Heat-Medium Oil
CN114111437A (en) * 2021-10-26 2022-03-01 湖南永杉锂业有限公司 Heat exchanger scaling treatment system and control method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH091090A (en) * 1995-06-14 1997-01-07 Teikoku Micro Kk Rust removal device for molding die-cooling part and removing of rust
KR0127198Y1 (en) * 1994-05-30 1998-10-15 김광호 Fluid feeding apparatus for injection molding mould
KR101330525B1 (en) 2013-01-04 2013-11-18 주식회사 어코드시스템 Temperature adjusting apparatus for mold and the method thereof
KR101512597B1 (en) * 2014-08-19 2015-04-16 주식회사 어코드시스템 Temperature Ajdusting Apparatus for Mold with Improved Cold Water Control Function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0127198Y1 (en) * 1994-05-30 1998-10-15 김광호 Fluid feeding apparatus for injection molding mould
JPH091090A (en) * 1995-06-14 1997-01-07 Teikoku Micro Kk Rust removal device for molding die-cooling part and removing of rust
KR101330525B1 (en) 2013-01-04 2013-11-18 주식회사 어코드시스템 Temperature adjusting apparatus for mold and the method thereof
KR101512597B1 (en) * 2014-08-19 2015-04-16 주식회사 어코드시스템 Temperature Ajdusting Apparatus for Mold with Improved Cold Water Control Function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101873241B1 (en) * 2018-02-27 2018-07-04 (주)애니텍 Temperature Adjusting Apparatus for Mold Having High Temperature Control and Scale Removal Function
KR102264405B1 (en) * 2021-03-10 2021-06-14 (주)애니텍 Mold Temperature Adjusting Apparatus Using Heat-Medium Oil
CN114111437A (en) * 2021-10-26 2022-03-01 湖南永杉锂业有限公司 Heat exchanger scaling treatment system and control method thereof

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