KR101786963B1 - Apparatus for measuring performance of thermal insulation and measuring method using the same - Google Patents

Abstract

The present invention discloses an adiabatic performance measuring device for measuring the adiabatic performance of an adiabatic material by a heat flow rate to the adiabatic material measured by a heat flow sensor and a measuring method using the same.
An apparatus for measuring an insulation performance according to an aspect of the present invention includes a heat flow sensor having a front surface for contacting a measured object, a first heat source provided on the heat flow sensor for heating the heat flow sensor, A heat source disposed on the upper portion of the first heat source, a third heat source disposed on the upper portion of the heat insulating material, and a second heat source disposed around the heat flow sensor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal insulation performance measuring apparatus and a measurement method using the thermal insulation performance measuring apparatus.

The present invention relates to a measuring apparatus for measuring a heat insulating performance of a heat insulating material by a change in heat flow measured by a heat flow sensor and a measuring method using the same.

In general, vacuum insulation materials have far better insulation performance than conventional insulation materials, and thus are applied to various fields such as buildings and household appliances. The vacuum insulator includes a porous inner core for maintaining the shape of the heat insulator, a gas barrier material film covering the inner core for vacuum maintenance, and a gas adsorbent for maintaining a long-term vacuum. The insulation performance of the vacuum insulation is determined according to the degree of vacuum in the interior, and the insulation performance is drastically lowered when the internal pressure reaches a certain pressure. As described above, the getter or desiccant in the vacuum insulating material suppresses the deterioration phenomenon in which the internal pressure of the vacuum insulating material rises and the heat insulating performance is deteriorated, thereby maintaining the high heat insulating performance for a long period of time. Insulation performance of vacuum insulation varies widely, but gas infiltration due to film damage due to external impact during handling and transportation is the biggest factor. In order to prevent gas permeation, the outer cover film is composed of a metal thin film made of aluminum foil having a thickness of about 6 to 7 um, an outer plastic film for protecting the metal thin film, and LDPE (Low Density Polyethylene) as a heat fusion layer for manufacturing the pouch. When the shell film is torn, the gas is completely introduced into the vacuum insulation material and swells up, so that it is visually distinguishable. However, in the case of a slow leak, the gas permeation progresses slowly, and due to the adsorption of the getter and the adsorbent, It is impossible to distinguish between the two.

However, it is difficult to replace the vacuum insulator after it is inserted into the refrigerator or building wall. In particular, in the case of a refrigerator, after the vacuum insulation is incorporated into the refrigerator, it is necessary to dispose of the entire product if a defect of the vacuum insulation is confirmed. Therefore, there is a need to carry out a reliability test to check the pressure and the thermal conductivity inside the vacuum insulator before mounting the vacuum insulator.

According to an aspect of the present invention, there is provided an insulation performance measuring apparatus and a measurement method using the same, which can quickly and accurately inspect the insulation performance of the insulation.

According to another aspect of the present invention, there is provided an adiabatic performance measuring apparatus capable of measuring the adiabatic performance of a heat insulator in a state that the heat insulator is installed inside the product, and a measuring method using the same.

According to an aspect of the present invention, there is provided an apparatus for measuring an adiabatic performance, comprising: a heat flow sensor having one surface for contact with an object to be measured; a first heat source disposed above the heat flow sensor for supplying heat with the heat flow sensor; A second heat source disposed around the heat flow sensor to prevent heat flow from being generated around the heat flow sensor, and a heat insulating material disposed on the first heat source.

And a third heat source disposed at an upper portion of the heat insulating material to prevent a heat flow from being generated to an upper portion of the heat flow sensor.

The control unit may further include a temperature controller for controlling the temperature of the first heat source, the second heat source, and the third heat source.

The controller may control the temperature of the first heat source, the second heat source, and the third heat source so that substantially the same temperature is maintained.

The heat flow sensor may be a contact heat flow sensor.

The heat insulating material may be a vacuum insulating material or a vacuum glass.

According to an aspect of the present invention, the heat insulating performance of the heat insulating material embedded in the refrigerator is measured by a heat flow amount measured through the heat flow sensor after a predetermined time has elapsed after the heat flow sensor of the device for measuring the heat insulating performance is brought into contact with the outer wall of the refrigerator. Can be measured.

An automatic measuring apparatus according to an aspect of the present invention includes: a heat flow sensor having one surface for contact with an object to be measured;

A first heat source disposed above the heat flow sensor for supplying heat to the heat flow sensor;

A second heat source disposed around the heat flow sensor to prevent a heat flow from being generated around the heat flow sensor;

And a heat insulating material disposed on the first heat source,

A driving device for moving the adiabatic performance measuring device forward and backward and bringing the adiabatic performance measuring device into contact with the measured object at a predetermined pressure and a load cell for measuring a pressure applied between the adiabatic performance measuring device and the measured object.

The driving device may include a motor for providing power and a ball screw for converting rotational motion generated in the motor into rectilinear motion.

The driving device may include an air cylinder.

According to an aspect of the present invention, there is provided a method of measuring a heat insulating performance, comprising the steps of heating a heat flow sensor to a predetermined temperature, and heating the periphery of the heat flow sensor to the predetermined temperature to prevent heat flow around the heat flow sensor. Heating the upper part of the heat flow sensor to the predetermined temperature so as to prevent the heat flow to the upper part of the heat flow sensor, and controlling the lower part of the heat flow sensor heated to the predetermined temperature to contact the object to be measured And measuring the heat insulation performance of the object to be measured by the heat flow measured by the heat flow sensor.

The heat insulating performance of the object to be measured can be measured by a heat flow amount measured by the heat flow sensor after a predetermined time has elapsed after the heat flow sensor is brought into contact with the object to be measured.

Measuring a first thermal conductivity of a plurality of samples using a thermal conductivity measurement apparatus and measuring a second thermal flow rate with respect to the samples using the thermal flow sensor to determine a relationship between the first thermal conductivity and the second thermal flow rate The heat insulating performance of the measured object can be measured by obtaining the first data and estimating the thermal conductivity of the measured object by the second heat flux based on the first data.

The first heat conductivity is measured using a thermal conductivity measuring device while adjusting the internal pressure of the vacuum insulation material capable of adjusting the internal pressure and the second heat flow rate is measured with respect to the vacuum insulation material using the heat flow sensor, The heat insulating performance of the object to be measured can be measured by obtaining first data on the correlation of the second heat flux and estimating a thermal conductivity of the object by the second heat flux based on the first data.

The third heat flux of the vacuum insulation material is measured by the heat flow sensor at each step of the internal pressure of the vacuum insulation material while adjusting the internal pressure of the vacuum insulation material capable of adjusting the internal pressure, and the degree of vacuum and thermal conductivity The first data can be corrected by comparing the third data with respect to the third heat flow.

According to an aspect of the present invention, An inner surface disposed inside the outer surface to form a storage chamber; A heat insulating member embedded between the trauma and the inner surface to shield the cold air from the storage chamber; Wherein the heat insulating member comprises a first heat insulating member formed of a vacuum thermal insulating panel attached to the inside of the external surface and a second heat insulating member formed by injecting a urethane foam into the remaining space in which the first heat insulating member is disposed, Wherein the vacuum insulation panel is made of only the first heat insulating member constituted by the vacuum insulating panel which secures a predetermined heat insulating performance by using the heat insulating performance measuring device before attaching the first heat insulating member composed of the vacuum insulating panel to the outer surface, By constituting the heat insulating member, it is possible to prevent the product from being discarded due to the defect of the final heat insulating member.

The heat insulating performance measuring apparatus includes a heat flow sensor, a first heat source disposed above the heat flow sensor to supply heat to the heat flow sensor, and a second heat source disposed around the heat flow sensor to prevent the heat flow from moving around the heat flow sensor. And a second heat source disposed therein.

1 is a perspective view of an adiabatic performance measuring apparatus according to an embodiment of the present invention.
2 is a view showing the lower part of the adiabatic performance measuring apparatus.
3 is a sectional view showing the internal structure of the insulation performance measuring apparatus.
4 is an exploded perspective view showing the internal structure of the insulation performance measuring apparatus.
5 is a graph showing changes in the value of the heat flow rate measured through the adiabatic performance measuring apparatus.
6 is a graph showing the correlation between the thermal conductivity and the heat flux.
7 is a view showing a vacuum insulation material capable of adjusting the internal pressure.
8 is a graph showing a correlation between the internal pressure of the vacuum insulator and the thermal conductivity.
9 is a view showing an automatic measurement system according to an embodiment of the present invention.
10 is a view showing a state in which the heat insulating performance measuring apparatus is used for measuring the heat insulating performance of a vacuum glass.
11 is a view showing a state of inspecting the heat insulating performance of the heat insulating material embedded in the refrigerator using the heat insulating performance measuring apparatus.
12 is a view illustrating an automatic measurement system for a refrigerator according to an embodiment of the present invention.

Hereinafter, an apparatus for measuring an adiabatic performance according to an embodiment of the present invention will be described with reference to the drawings.

As shown in Figs. 1 to 4, the adiabatic performance measuring apparatus 10 includes a cover 11 forming an outer appearance and a handle 12 provided on an upper portion of the cover 11. As shown in Fig.

The heat insulating performance measuring apparatus 10 includes a heat flow sensor 100 installed inside the cover 11, a first heat source 100 installed inside the cover 11, A first heat source 120, a second heat source 110, a heat insulating material 130, and a third heat source 140.

The heat flow sensor 100 may be disposed at the center of the open lower portion of the cover 11 so as to be in contact with the surface of the measured object V. [ The heat flow sensor 100 may be a contact heat flow sensor. In this case, the heat flow sensor 100 may be a film-like thin plate.

The heat flow sensor 100 has a heat flow measurement direction set therein. The heat flow sensor 100 may be disposed such that the heat flow measurement direction is directed to the measured object V.

A first heat source 120 for heating a predetermined temperature of the heat flow sensor 100 is disposed above the heat flow sensor 100. The first heat source 120 may be configured in such a manner that an electrothermal heater is inserted into a metal having excellent thermal conductivity such as copper or aluminum, or a thin film type film heater is attached to a metal. The first heat source 120 may be configured to circulate a fluid heated to a predetermined temperature and may include a heat flow sensor 100 and a temperature sensor 121 for sensing a temperature of the first heat source 120 . The first heat source 120 may have a size corresponding to the upper surface of the heat flow sensor 100 so as to cover the entire upper surface of the heat flow sensor 100.

The second heat source 110 may be disposed around the heat flow sensor 100 and the first heat source 120 and may be formed to have the same thickness as the thickness of the heat flow sensor 100 and the first heat source 120 have. The second heat source 110 may be constructed in such a manner that a thin film type film heater is attached to an electrothermal heater or metal as in the case of the first heat source 120. Also, the second heat source 110 may be configured to circulate the fluid heated to a predetermined temperature, and a temperature sensor 111 for sensing the temperature of the second heat source 110 may be installed.

A support member 150 may be provided between the second heat source 110 and the inner surface of the cover 11 to support the second heat source 110 to keep the second heat source 110 away from the inner surface of the cover 11. [

The support member 150 supports the second heat source 110 in a state spaced apart from the inner surface of the cover 11 to minimize heat transfer to the cover 11 during operation of the second heat source 110. Therefore, the cover 11 is prevented from being heated close to the temperature of the second heat source 110. [

The heat insulating material 130 having an excellent heat insulating performance may be disposed on the first heat source 120 and the second heat source 110 so that all the heat generated from the first heat source may be directed to the measured object. The heat insulating material 130 may be composed of a vacuum insulating panel (VIP).

A third heat source 140 may be provided on the heat insulating material 130. The third heat source 140 may be configured in such a manner that a thin film type film heater is attached to an electrothermal heater or metal in the same manner as the first heat source 120 and the second heat source 110. Also, the third heat source 140 may be configured to circulate the fluid heated to a predetermined temperature, and a temperature sensor 141 may be installed to sense the temperature.

The protective heat source 110, the first heat source 120 and the third heat source 140 can be heated by receiving power from the control unit 20 through the electric wire 13 and the heat sources 110, 120, The temperatures of the heat sources 110, 120, and 140 measured through the temperature sensors 111, 121, and 141 installed in the controller 130 are input to the controller 20 through the wires 130.

The controller 20 monitors the temperatures of the heat sources 120 and 140 measured through the temperature sensors 121 and 141 installed in the first heat source 120 and the third heat source 140, By controlling the power supply to the heat source 140, the first heat source 120 and the third heat source 140 are controlled to have the same temperature. If the temperatures of the first heat source 120 and the third heat source 140 are set to be equal to each other, the temperature difference between the first heat source 120 and the third heat source 140 becomes zero, The amount of heat flow in the direction opposite to the measured object V is also zero with respect to the first heat source 120 by the heat insulating material 130 located between the first heat source 120 and the third heat source 140, Accuracy can be increased.

The control unit 20 may control the first heat source 120 and the second heat source 120 according to the temperatures of the heat sources 110 and 120 measured through the first heat source 120 and the temperature sensors 111 and 121 installed in the second heat source 110, By controlling the power supply to the heat source 110, the first heat source 120 and the second heat source 110 are controlled to have the same temperature. The control unit 20 controls the first heat source 120, the third heat source 140, and the second heat source 140 so that the temperatures of the rear heat source 140 and the second heat source 110 are equal to each other based on the temperature of the first heat source 120, The operation of the second heat source 110 can be controlled.

When the first heat source 120 and the second heat source 110 are set to have the same temperature, the heat flow sensor 100 and the second heat source 110, which are heated to the same temperature by the first heat source 120, So that the heat flow amount between the heat flow sensor 100 and the second heat source 110 on the surface of the object V when the object to be measured V is contacted can be substantially zero . In addition, continuous measurement is possible by maintaining the three heat sources 110, 120, and 140 at the same temperature at all times through PID (Proportional Integral Derivative) temperature control.

The second heat source 110 may be disposed around the first heat source 120 and may be disposed at a predetermined distance from the heat flow sensor 100 and the first heat source 120.

The heat insulating material 130 disposed between the first heat source 120 and the third heat source 140 may have a low heat transfer coefficient even if a minute temperature difference is instantaneously generated between the first heat source 120 and the third heat source 130 And functions as a buffer to prevent heat flow between the first heat source 120 and the third heat source 140 by blocking the heat flow.

Therefore, the heat flow amount in the forward direction except for the direction toward the object to be measured V can be made substantially zero centering on the heat flow sensor 100, so that the heat flow sensor 100, the first heat source 120, The heat flow amount measured by bringing the heat flow sensor 100 into contact with the measured object V in a state in which the temperatures of the two heat sources 110 and the third heat source 140 are all the same is all the heat flow sensor 100 and the measured object V), as shown in Fig.

Hereinafter, a method of measuring the heat insulation performance of the object to be measured V using the thermal insulation performance measuring apparatus 10 according to the present invention will be described in detail.

First, the heat flow sensor 100 is heated through the first heat source 120 and preheated to a predetermined temperature in order to measure the heat insulation performance. The second heat source 110 and the third heat source 140 are also heated by the heat flow sensor 100 and 1 Heat is applied in the same manner as the temperature of the heat source 120. In this case, the heating temperature may be about 70 to 90 ° C.

Measurement can be started when the temperature of the heat flow sensor 100, the first heat source 120, the second heat source 110, and the third heat source 140 become equal to each other.

The heat flow sensor 100 and the second heat source 110 disposed on the lower surface of the cover 11 are brought into contact with the surface of the measured object V for measurement. At this time, the measured object (V) may be a vacuum insulation material. As shown in FIG. 3, the vacuum insulation material may include a porous core material V2 and a protective film V1 for retaining the vacuum of the core material V2 while fanning the outside of the core material V2.

5, the value of the heat flow measured from the heat flow sensor 100 is kept low before the heat flow sensor 100 is brought into contact with the vacuum insulation material as the measured object V, and the heat flow sensor 100 and the second heat source 110 The value of the heat flux measured through the heat flow sensor 100 instantaneously sharply increases when the surface of the vacuum insulation panel is brought into contact with the surface of the vacuum insulation panel. In this case, the thermal conductivity of the protective film (V1) forming the surface of the vacuum insulation material is relatively higher than the thermal conductivity of the core material (V2) of the inner insulation material. The surface of the heat insulation material In the initial stage, a large amount of heat is generated in the protective film (V1) having a relatively high thermal conductivity.

However, after the heat flow sensor 100 is brought into contact with the surface of the vacuum insulation material V, the heat flow value measured by the heat flow sensor 100 gradually decreases with time. The protective film V1 is heated to a temperature close to that of the heat flow sensor 100 as time elapses, and the surface effect disappears and the core material V2) is reflected.

Therefore, the value of the heat flow rate measured through the heat flow sensor 100 after a predetermined measurement waiting time after the heat flow sensor 100 is brought into contact with the vacuum insulation material V can be considered as an index of the heat insulation performance measurement.

In the case where the vacuum insulator is in a steady state, the value of the heat flow measured by the heat flow sensor is formed in the same pattern as the G line, and the measured value converges to the value of the low heat flow. On the other hand, It can be seen that the measured value converges to the value of the heat flux higher than the G line like the N line.

This measurement waiting time can be determined in consideration of the necessity of measuring the insulation performance promptly while reliability of the measurement value can be ensured by the repeated experiment because the vacuum waiting time can be changed according to the material and thickness of the protective film in vacuum insulation. And in the case of general vacuum insulation, it can be between 7 and 15 seconds.

Although the value of the heat flow rate is finally measured in the heat flow sensor 100 through the above process, the value of the heat flow rate does not mean the heat conductivity.

However, since the thermal conductivity and the heat flow rate of an object are linearly proportional to each other, a plurality of different heat insulating materials whose thermal conductivity is measured in advance through a separate thermal conductivity measuring device (not shown) 10, the relationship between the previously measured thermal conductivity and the heat flux measured by the heat insulating performance measuring apparatus 10 is stored in a database, and a graph showing a correlation between the thermal conductivity and the heat flux as shown in FIG. 6 can be obtained.

That is, the heat flow rate measured through the heat insulation performance measuring device 10 is outputted in the form of a potential difference through the heat flow sensor 100, but the heat conductivity of the vacuum insulation material V can be estimated Therefore, it is possible to check whether the vacuum insulation is normal or not by discriminating whether or not the vacuum insulation has a thermal conductivity within a normal range through the heat flow rate measured through the insulation performance measuring device 10.

In addition, a plurality of different heat insulators whose thermal conductivity is measured in advance through a separate thermal conductivity measuring device (not shown) as in the above-described method is periodically measured by the heat insulating performance measuring device 10 according to the present invention, and the thermal conductivity and the heat flux May be periodically corrected.

Further, as shown in FIG. 7, data on the correlation between the thermal conductivity and the heat flux can be obtained and the data on the correlation can be periodically corrected using the vacuum insulator A capable of measuring and adjusting the internal pressure.

As shown in Fig. 7, a pressure gauge A1 capable of measuring the pressure inside the vacuum insulation material A and a control valve A2 for controlling the pressure inside the vacuum insulation material are provided in the vacuum insulation material A, Can be installed. Therefore, the user can adjust the internal pressure (vacuum degree) of the vacuum insulation material A through the regulating valve A2 while monitoring the pressure inside the vacuum insulation material A through the pressure gauge A1.

The thermal conductivity of the vacuum insulator A is measured through a separate precision thermal conductivity measuring device (not shown) in a state where the internal pressure (degree of vacuum) is controlled, and the thermal conductivity measured by the heat flow sensor 100 (see FIG. 3) Data on the relationship of the heat fluxes of the samples can be obtained and the thermal conductivity of the object to be measured can be estimated from the heat flux measured in the measured object based on the data.

The pressure inside the vacuum insulator and the thermal conductivity of the vacuum insulator have an inverse relationship as shown in the diagram of Fig. Therefore, if the internal pressure (internal vacuum degree) of the vacuum insulation is known, the thermal conductivity of the vacuum insulation can be estimated by the diagram of FIG. 8, the predicted thermal conductivity is obtained according to the pressure, and the heat flow rate is measured through the thermal insulation performance measuring apparatus 10 according to the present invention to determine the thermal conductivity And the data of the correlation between the heat flux and the heat flux.

The above-described diagram of FIG. 8 has been established by experiments and is well known in the art, so a detailed description thereof will be omitted.

The heat insulating performance measuring apparatus 10 shown in FIG. 1 according to the present invention is configured as an automatic measuring system 200 as shown in FIG. 9 so that the main frame 210 and the heat insulating performance measuring apparatus 10 are moved forward and backward A load cell 230 for measuring the pressure applied between the adiabatic performance measuring device 10 and the object to be measured V and a driving device 220 for measuring the pressure applied to the object to be measured V, And a guide rod 240 for guiding the load cell 230 and the load cell 230 to be vertically movable with respect to the main frame 210.

The driving unit 220 may include a servo motor 221 for providing power and a ball screw 222 for converting rotational motion generated in the servo motor 221 into rectilinear motion.

A load cell 230 and an adiabatic performance measuring device 10 are installed under the driving device 220. A plurality of guide rods 240 may be provided and the driving device 220 may be coupled to the guide holes 211 provided in the main frame 210 so as to be movable up and down with respect to the main frame 210.

The nut portion 223 of the ball screw 222 is installed on the upper plate 211 of the main frame 210. When the screw portion 224 of the ball screw 222 is rotated by the servomotor 221, The driving device 220, the adiabatic performance measuring device 10, and the load cell 230 are moved up and down while the upward and downward movement of the part 224 is induced.

The operation of the automatic measurement system 200 will be described with reference to the flow chart of the operation of the automatic measurement system 200. First, the workpiece V is placed on the shelf 213 of the main frame 210, Thereby inducing the lowering of the adiabatic performance measuring apparatus 10. The pressure applied to the object V by the adiabatic performance measuring apparatus 10 is detected in the load cell 230 while the adiabatic performance measuring apparatus 10 starts to contact the object V, The servo motor 221 is operated until the appropriate value is reached, and when the pressure reaches the predetermined value, the operation of the servo motor 221 is stopped, and the measurement process by the heat insulating performance measuring apparatus 10 is started.

When the measurement of the thermal insulation performance measuring apparatus 10 is finished, the servo motor 221 is operated in the direction opposite to the rotating direction during the down operation of the thermal insulation performance measuring apparatus 10, And returns to the initial state.

9 shows an embodiment in which the driving unit 220 is configured using the servo motor 221 and the ball screw 222 according to the automatic measuring system 200 shown in FIG. But it is applicable if it is a driving element that can induce a linear reciprocating motion. For example, an air cylinder operated by a pneumatic pressure, a hydraulic cylinder operated by hydraulic pressure, a linear motor, or the like may be constituted by a driving device. Further, the servo motor 221 of the drive unit 220 may be replaced by a step motor.

As shown in FIG. 10, the thermal insulation performance measuring apparatus 10 according to an embodiment of the present invention is not limited to a vacuum insulation material, and can be applied to a vacuum glass G. FIG. The vacuum glass G can be used to measure the heat insulating performance of the vacuum glass G in which the vacuum space G2 is formed between the two glass sheets G1 using the automatic measuring system 200 or the manual heat insulating performance measuring apparatus 10 . However, since it takes time for the heat to pass through the glass, unlike the envelope material film of the vacuum insulation material, the time required for the measurement after stabilizing the heat flow amount in FIG. 5 can be as long as one minute or less.

The method for measuring the heat insulating performance of the heat insulating material such as the vacuum insulating material through the heat insulating performance measuring apparatus 10 according to the present invention can also be applied as a method for measuring the heat insulating performance of the heat insulating material embedded in the refrigerator.

As shown in Fig. 11, the method for measuring the heat insulation performance of the heat insulating material buried in the refrigerator R is characterized in that the heat insulating sensor 100 (see Fig. 3) and the second heat source 110 The performance measuring device 10 approaches the outer wall of the refrigerator R and presses it toward the outer wall of the refrigerator R. [

Since the outer wall of the refrigerator R is made of a metal plate or plastic resin having a relatively high thermal conductivity as compared with that of the inside of the refrigerator R, the value of the heat flow rate measured through the heat flow sensor 100 at an early stage of measurement, . Particularly, since the outer wall of the refrigerator R is thicker than the protective film of the vacuum insulation material, the outer wall of the refrigerator R is heated to a temperature similar to that of the heat flow sensor 100, and the surface effect disappears. It can take a long time. Therefore, the measurement waiting time can be longer than when the vacuum insulator is measured. However, once the outer wall of the refrigerator (R) is heated to a temperature similar to that of the heat flow sensor and the surface effect disappears, the heat insulation effect by the vacuum insulation is reflected in the heat flux value, Convergence. Therefore, the time when the measured value converges can be used as the measurement waiting time, and it is possible to check whether or not the heat insulating material embedded in the refrigerator R is normal by the measured value after the measurement waiting time elapses after the start of the measurement.

As shown in FIG. 12, the apparatus for measuring an insulation performance according to an embodiment of the present invention may also include an automatic measurement system 300 for measuring the insulation performance of a heat insulating material embedded in a refrigerator.

The automatic measuring system 300 for a refrigerator includes an insulating performance measuring device 10 disposed on both sides of the refrigerator R, a driving device 320 for horizontally moving the insulating performance measuring device 10, And a frame 310 for supporting the apparatus 320 and the adiabatic performance measuring apparatus 10. The entire configuration except for the frame 310 is the same as the automatic measuring system 200 according to the previously described FIG. Can be similar.

The drive unit 320 may include the servo motor 321 and the ball screw 322 in the same manner as the drive unit 320 of the automatic measurement system 300 according to the previously described FIG.

Similarly, the drive device 320 may be constituted by an air cylinder operated by air pressure or a hydraulic cylinder or a linear motor operated by hydraulic pressure.

Also. A load cell 330 may be provided between the driving device 320 and the adiabatic performance measuring device 10 for measuring the pressure that is applied when the adiabatic performance measuring device 10 is brought into contact with the object to be measured.

The automatic measuring system 300 for a refrigerator is applied to the production line of the refrigerator R to finally measure the heat insulating performance of the heat insulating material embedded in the side of the refrigerator R moved along the conveyor belt (not shown) And can be used as a final quality inspection equipment.

Particularly, even when a vacuum insulation material confirmed to be in a normal state in the inspection before being embedded in the refrigerator R is buried in the refrigerator R, the protective film V1 (see FIG. 3) of the vacuum insulation material V As the internal pressure of the vacuum insulation increases, defective vacuum insulation may occur. Therefore, in order to prepare for the possibility of occurrence of defects in the refrigerator production stage, the automatic insulation measuring system 300 is used to measure the heat insulation performance of the vacuum insulation material in the refrigerator (R) It is possible to check whether or not it is normal.

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 and scope of the invention. Accordingly, modifications or variations are intended to fall within the scope of the appended claims.

10: Insulation performance measuring device 20:
100: heat flow sensor, 110: second heat source
120: first heat source 130: insulation
140: third heat source 150: support member
V: Insulation R: Refrigerator

Claims (11)

A first heat source;
A second heat source disposed on the periphery of the first heat source such that one side of the first heat source is opened, the heat of the first heat source being arranged to transfer heat through one surface of the first heat source;
And a heat flow sensor located on one side of the first heat source and having a first side contacting the first heat source and a second side contacting the measured object and sensing a heat flow rate generated from the first heat source. The method according to claim 1,
Wherein the second heat source comprises:
Wherein the first heat source and the second heat source are spaced apart from each other by a predetermined distance. The method according to claim 1,
Wherein the second heat source comprises:
And is provided so as to be in contact with the object to be measured together with the other face of the heat flow sensor. The method according to claim 1,
And a heat insulating material disposed on the other surface of the first heat source. 5. The method of claim 4,
The heat insulating material,
And the heat insulating performance measuring device is provided in contact with the first and second heat sources. The method according to claim 1,
Wherein the first and second heat sources are configured to maintain the same temperature with each other. The method according to claim 1,
And a third heat source disposed on the other surface of the first heat source and maintained at the same temperature as the first and second heat sources. The method according to claim 1,
A cover provided so as to locate the first and second heat sources and the heat flow sensor therein;
And a handle provided on one side of the cover. The method according to claim 1,
A cover provided so as to locate the first and second heat sources and the heat flow sensor therein;
And a support member disposed between the cover and the first and second heat sources and the heat flow sensor such that the first and second heat sources and the heat flow sensor are spaced apart from the cover. The method according to claim 1,
Wherein the heat flow sensor comprises:
An insulation performance measuring device which is a contact type thin film plate. An automatic measurement system comprising: the thermal insulation performance measuring device according to claim 1; and a drive device for moving the thermal insulation performance measuring device and contacting the measured object with a predetermined pressure.

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