TW202413853A - Heat transfer member and radiation panel - Google Patents

Abstract

To provide a heat transfer member and a radiation panel that exhibit efficient radiation to thereby accelerate heat exchange with the outside and that enhances comfort for users. A radiation panel 1 according to the present invention is provided with a panel body 2 which has a heat medium flow pipe 5 between a pair of left and right columns 3, 3. The panel body 2 has a plurality of long heat transfer members 4 which extend along the vertical direction and are arrayed in parallel between the columns 3, 3. The heat transfer members 4 each have a long body part 40, and openings 42 are formed on both sides of the body part 40 so as to be continuous along the longitudinal direction. Since a hollow part 41 and the external space are connected through the openings 42, heat will not be retained inside the hollow part 41, and heat exchange with the outside can be actively accelerated. Thus, heat exchanging performance can be improved.

Description

Thermally conductive components and radiation panels

The present invention relates to a heat-conducting member and a radiation panel. More specifically, the present invention relates to a heat-conducting member and a radiation panel that can promote heat exchange with the outside through efficient radiation and improve the comfort of users.

In recent years, in response to the demand for energy saving and comfort, radiation-type air conditioners that perform indoor air conditioning by heat radiation of heat energy without blowing cold or warm air directly into the room have attracted attention. This radiation-type air conditioner is composed of a radiation panel in which a heat-conducting member with a heat medium flow pipe is arranged in parallel, and is arranged from the ground to the ceiling, and a heat medium such as warm water or cold water is circulated in the heat medium flow pipe, so that the radiation panel radiates heat into the room or exchanges heat with the indoor air to perform indoor cooling and heating (for example, refer to patent document 1).

The cross-sectional structure of the heat conducting member disclosed in Patent Document 1 is shown in FIG6 . The heat conducting member 101 is formed into an extrusion-molded cross-sectional shape that is approximately elliptical, and an insertion hole 102 for inserting a heat medium flow pipe is formed approximately in the center, and the surface of the heat conducting member 101 is formed with a plurality of fin portions 103 by rolling processing in order to expand the contact area. The fin portion 103 extends in the longitudinal direction of the heat conducting member 101, that is, in the vertical direction when the radiation panel is vertically arranged, and also has the function of guiding the condensed water attached to the heat conducting member 101 downward during cooling.

In the conventional configuration as described above, when indoor heating is performed, high-temperature heat medium is supplied to the heat medium flow pipe, and the high-temperature heat of the heat medium is transferred from the surface of the heat-conducting component 101 to the lower-temperature indoor side as radiant heat and convection heat through heat conduction, thereby slowly heating up the overall indoor temperature.

On the other hand, when indoor cooling is performed, the principle is opposite to that of heating. By supplying low-temperature heat medium to the heat medium circulation pipe to cool the surrounding air, the warm indoor air can be transferred by radiation as radiant heat to the heat-conducting component, and convection is caused around the heat-conducting component, thereby slowly lowering the overall indoor temperature. [Prior technical literature] [Patent literature]

Patent Document 1 Japanese Patent Application Publication No. 2015-025650

[The problem the invention is trying to solve]

However, in the case of the conventional radiation panel disclosed in the aforementioned patent document 1, since the punching hole formed between the heat conducting member and the heat medium flow pipe becomes a closed area, the radiant heat released from the heat medium flow pipe is not released to the outside but is retained in the closed area. As a result, the heat exchange with the outside cannot be promoted, which is the main reason for the low radiation efficiency.

The present invention is made in view of the above points, and its purpose is to provide a heat-conducting component and a radiation panel that can promote heat exchange with the outside through efficient radiation and improve the comfort of the user. [Technical means to solve the problem]

In order to achieve the above-mentioned purpose, the heat-conducting component of the present invention has a long strip-shaped main body, inside which a punch hole portion and a through hole for a heat medium circulation pipe to pass through are formed along the length direction, and the above-mentioned main body is formed with an opening portion connecting the above-mentioned punch hole portion and the outside.

Here, the heat-conducting component has a long main body, and a punching portion and a penetration hole for a heat medium circulation pipe to pass through are formed inside the main body along the length direction. Cold water or hot water serving as heat medium can be circulated in the heat medium circulation pipe passing through the penetration hole, thereby heating (or cooling) the air around the punching portion.

In addition, an opening is formed in the main body for connecting the punch hole and the outside, so that when heating, the heated air in the punch hole can be directly released to the outside through the opening. In addition, when cooling, the high-temperature air outside can be directly introduced into the punch hole through the opening to cool it. In this way, the heat exchange rate during heating and cooling can be improved, and the indoor space can be kept at a comfortable temperature in a short time.

Furthermore, since the surface of the heat-conducting member can be heated by radiant heat transfer from the outer portion (center portion) of the heat medium circulation tube to the surface of the heat-conducting member during heating, and the surface of the heat-conducting member can be cooled by radiant heat transfer from the surface of the heat-conducting member to the center portion of the heat medium circulation tube during cooling, the heat exchange efficiency can be improved.

In addition, when the opening is formed continuously along the length direction of the main body, the heat exchange rate can be further improved.

In addition, in the case where the heat exchange device is composed of a first main body portion and a second main body portion which are substantially similar in shape to each other in the axial direction of the insertion hole, wherein the first main body portion is formed with a first punch hole portion which is connected to the outside through a first opening portion, and the second main body portion is formed with a second punch hole portion which is connected to the outside through a second opening portion, since the first main body portion on one side and the second main body portion on the other side are respectively connected to the outside with the insertion hole through which the heat medium circulation pipe is passed being the center, the heat exchange efficiency between the punch hole portion and the outside can be improved.

When the first body portion and the second body portion are composed of separable halves, the heat conductive member can be simply assembled by joining the halves of the first body portion and the second body portion, thereby reducing the manufacturing cost.

In addition, when the main body is integrally formed by extrusion molding of aluminum, the cost for molding can be suppressed. In addition, since the thermal conductivity of aluminum is high, heat can be efficiently transferred from the heat medium flow pipe to the outside, or from the outside to the heat medium flow pipe.

In addition, the entire surface of the body is anodic-oxidized to form an oxide film, which can promote the transfer of radiant heat and further improve the heat exchange rate.

In addition, when the fins protruding in the length direction of the body surface are corrugated at predetermined intervals in the width direction, the contact area can be increased, thereby improving the heat conduction between the heat medium flow pipe and the fins.

In order to achieve the above-mentioned purpose, the radiation panel of the present invention has: a pair of left and right pillars, which are vertically arranged on the installation surface in the vertical direction; and a heat-conducting component, in the interior of the long strip-shaped main body, a punching portion and a through hole for the heat medium flow pipe to pass through are formed along the length direction, and an opening portion is formed to connect the punching portion and the outside. The heat-conducting component has a panel body arranged in parallel along a predetermined direction between the above-mentioned pair of pillars.

Here, the radiation panel is provided with a pair of left and right pillars vertically disposed on a mounting surface, and a heat conducting member described later can be supported by the pair of pillars, and the radiation panel can be installed indoors.

In addition, the radiation panel has a punch hole portion and a penetration hole for a heat medium circulation pipe to pass through formed along the length direction inside the elongated main body portion, and has a panel body formed of a heat conductive component formed with the punch hole portion and an opening portion connected to the outside. Cold water or warm water serving as heat medium can be circulated in the heat medium circulation pipe provided through the penetration hole, thereby heating (or cooling) the air around the punch hole portion.

In addition, since the panel body is a structure in which heat-conducting components are arranged in parallel along a predetermined direction between a pair of pillars, the front and back of the panel body are exposed to the indoor space, and the thermal efficiency can be improved by installing multiple heat-conducting components.

In addition, when the opening formed in the heat-conducting member is formed on one side of the main body and the other side opposite to the one side, and is opened in a direction intersecting at a predetermined angle relative to the parallel arrangement direction of the heat-conducting member, the radiant heat from the heat medium flow pipe can be actively released to the outer side of the radiation panel during heating. In addition, during cooling, the indoor air can be actively introduced into the main body of the heat-conducting member with the opening. Therefore, the thermal efficiency during heating and cooling can be improved, and the indoor temperature can be adjusted in a short time. [Effect of the invention]

According to the heat conducting member and the radiation panel of the present invention, heat exchange with the outside can be promoted through efficient radiation, and the comfort for users can be improved.

Below, the implementation of the present invention regarding the heat conducting component and the radiation panel is described with reference to the drawings for understanding the present invention.

First, the overall structure of the radiation panel 1 involved in the embodiment of the present invention is described based on Figures 1 and 2. As shown in Figure 1, the radiation panel 1 is mainly composed of a pair of pillars 3, 3, and a panel body 2 formed by a plurality of heat-conducting members 4 arranged in parallel between the pillars 3, 3.

The pillars 3, 3 are arranged at the left and right ends of the panel body 2 in the width direction, and each pillar 3, 3 is arranged vertically upward from the installation surface G. In addition, in order to ensure the strength of the pillars 3, 3, cross members not shown in the figure can also be set at the upper and lower ends of the pillars 3, 3, respectively, so that the whole is formed into a square frame.

An upper space S1 is formed on the upper end side of the pillars 3, 3, and a refrigerant pipe 6 is housed in the upper space S1. The refrigerant pipe 6 is used to supply heat medium to the heat medium flow pipe 5 provided in each heat conducting member 4. The front side and the back side of the upper space S1 are covered with an upper cover 7 so that the refrigerant pipe 6 cannot be visually seen from the outside. The upper cover 7 is detachably mounted on the upper part of the pillars 3, 3.

In addition, the heat medium flowing in the heat medium circulation pipe 5 is, for example, warm water, steam, cold water, or chlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) instead of chlorofluorocarbons, but is not limited to these, and other well-known heat media may also be used.

A lower space S2 is formed at the lower end of the pillars 3, 3, and a drain pan 8 is provided for the condensed water generated on the heat conducting member 4 to drip. The condensed water dripping on the drain pan 8 is sent to the drain pump and the drain hose and discharged to the outside. The front and back sides of this lower space S2 are covered with a lower cover 9, so that the drain pan 8 cannot be visually viewed from the outside. The lower cover 9 is detachably mounted on the lower part of the pillars 3, 3.

The panel body 2 has a plurality of heat-conducting members 4 extending in a vertical direction and arranged in parallel between the pillars 3, 3. The heat-conducting members 4 are made by extrusion molding of aluminum, and the entire surface is anodized. The upper and lower ends are fixed to the cross member of the panel body 2 by known fixing means such as screws.

Here, the heat conducting member 4 does not necessarily need to be made of aluminum, and can be made of silver, copper, gold, nickel, platinum, etc. as long as it is a material with high thermal conductivity.

In addition, the surface of the heat conducting member 4 does not necessarily need to be anodic oxidized. However, by anodic oxidizing the entire surface of the heat conducting member 4, the radiant heat is directly promoted to move from the center of the heat conducting member 4 to the outside as radiant heat, and the heat exchange performance can be improved by exchanging convective heat with the outside air.

The detailed structure of the heat conducting member 4 is described with reference to FIG3 . The heat conducting member 4 has a long body 40, which has a front portion 48 and a back portion 49, a punch hole 41 formed along the length direction inside, and a circular insertion hole 43 for the heat medium flow pipe 5 to pass through is formed at a substantially central position in a plan view.

Here, the insertion hole 43 does not necessarily need to be formed at a substantially central position in a plan view of the main body 40. However, by forming the insertion hole 43 at a substantially central position in a plan view of the main body 40, the heat medium supplied to the heat medium flow pipe 5 is efficiently heat-transferred to the entire main body 40, thereby improving the radiation effect of the radiation panel 1.

The main body 40 is composed of a first main body 40a and a second main body 40b having substantially similar shapes in the axial direction of the insertion hole 43. The first main body 40a and the second main body 40b are composed of separable halves. Specifically, the first main body 40a and the second main body 40b are respectively formed with a recess 44 and a protruding piece 45, and can be integrated by fitting these recess 44 and protruding piece 45 together.

Here, the body 40 does not necessarily need to be composed of the first body 40a and the second body 40b which are separable halves, and may be integrally formed. However, since the body 40 is configured such that the first body 40a and the second body 40b are separable, the panel body 2 can be assembled simply by fitting the first body 40a and the second body 40b to the heat medium flow pipe 5 from each other, so from the viewpoint of simplifying the manufacturing steps, it is preferred that the body 40 is composed of the first body 40a and the second body 40b halves.

The body 40 has fins 46 protruding in the longitudinal direction on the surface thereof by, for example, corrugation. The fins 46 are formed at predetermined intervals in the width direction of the body 40 to form a wavy concave-convex surface as a whole.

Here, the surface of the body 40 does not necessarily need to be formed with a concave-convex surface formed by rolling. However, by forming the concave-convex surface on the surface of the body 40, the contact area between the heat medium flow pipe 5 and the body 40 can be increased, and the contact thermal resistance can be reduced to increase the heat conduction between the heat medium flow pipe 5 and the body 40, so that the heat exchange performance can be improved.

The four corners of the body 40 are formed with approximately semicircular fixing grooves 47, which can be used to insert screws for fixing the heat conducting member 4 to the panel body 2. The heat conducting member 4 can be fixed to the panel body 2 by passing the screws from the cross member of the panel body 2 to the fixing grooves, so that the heat conducting member 4 is firmly fixed to the panel body 2.

Here, the fixing grooves 47 do not necessarily need to be formed at the four corners of the body 40, and may be formed at any position of the body 40. However, by forming the fixing grooves 47 at the four corners of the body 40, the heat conducting member 4 can be stably mounted on the panel body 2, and the mounting strength can be improved.

The openings 42 are continuously formed on both sides of the main body 40 along the length direction, and the punching holes 41 and the external space are connected through the openings 42. In the conventional heat-conducting member 101 shown in FIG. 6 , both sides of the main body are blocked, and the punching holes are formed as a closed space. Therefore, the radiant heat released from the heat medium flow pipe 102 is not released to the outside, but causes convection in the closed area, and fails to promote heat exchange with the outside, which is the main reason for the low radiation efficiency.

On the other hand, in the heat-conducting component 4 involved in the embodiment of the present invention, the punch hole portion 41 and the external space are connected through the opening portion 42, so that heat is not retained in the punch hole portion 41, and heat exchange with the outside is actively promoted, thereby improving the heat exchange performance.

FIG. 4 is a diagram for explaining the mechanism of the heat transfer member 4 involved in the embodiment of the present invention, FIG. 4(a) is a diagram for explaining the state of heat exchange during heating, and FIG. 4(b) is a diagram for explaining the state of heat exchange during cooling. First, during heating, the warm heat medium produced in the unillustrated refrigeration cycle is sent to the heat medium flow pipe 5 provided in each heat transfer member 4 through the refrigerant pipe 6. On the other hand, during cooling, the cold and hot heat medium produced in the unillustrated refrigeration cycle is condensed in the unillustrated outdoor heat exchanger, and the condensed heat medium is sent to the inside of the heat medium flow pipe 5 through the refrigerant pipe 6.

In the above-mentioned structure, the radiant heat dissipated from the surface of the insertion hole 43 to the punch hole portion 41 is conducted as radiant heat to the fin portion 46 in the punch hole portion 41, and the fin portion 46 itself is heated or cooled, and heat exchange can be facilitated by heat dissipation or heat absorption caused by the radiant heat from the surface of the fin portion 46. In addition, due to this effect, the fin portion 46 itself becomes hot or cold, so that the external air becomes convective heat and repeatedly contacts the surfaces of the front portion 48 and the back portion 49 of the main body portion 40, and the sensible heat and latent heat can be repeatedly dissipated or absorbed to promote the exchange of convective heat.

Furthermore, the first body portion 40a and the second body portion 40b are open at one side, respectively, and form a substantially U-shaped shape surrounded by the surface of the insertion hole 43 and the inner surface of the punch hole portion 41, so that the air in the punch hole portion 41 can be easily heated during heating and easily cooled during cooling. In this way, since the temperature difference between the air inside and outside the punch hole portion 41 can be increased, the temperature rise during heating is promoted, or the temperature drop during cooling is promoted, and heat exchange is promoted.

In addition, for example, during heating, the radiant heat is dissipated from the entire surface of the heat conducting member 4 to the outside space. At this time, the radiant heat on the surface of the insertion hole 43 located near the heat medium is directed to the outside of the opening 42, and heat exchange with the outside space is promoted. In this way, the main body 40 is formed into a shape that can cooperate with the heat conduction of the heat conducting member 4 to provide the effect of heat exchange with the outside space due to the movement of the radiant heat, thereby dramatically improving the heat exchange between the heat medium and the outside space.

The heat exchanged air becomes convection heat and contacts the heat conducting member 4 repeatedly, thereby further promoting heat exchange. At this time, as mentioned above, by forming a plurality of fins 46 on the surface of the main body 40, the contact area with radiant heat or convection heat can be increased. Through the above mechanism, in addition to the convection heat exchange in which the heat energy of the heat medium is exchanged by convection, the heat exchange with the heat medium is promoted by utilizing the transfer of radiant heat, thereby achieving a higher heat exchange performance.

As described above, the heat transfer member 4 according to the embodiment of the present invention has the opening 42 formed therein, so that heat exchange by radiant heat can be promoted in both heating and cooling conditions, and thus the heat exchange efficiency is further improved compared to conventional heat transfer members.

Here, the opening 42 does not necessarily need to be formed on each side of the heat conducting member 4, and may be formed on any one side. However, in this case, since the radiant heat flows in and out of the opening 42 only on one side of the opening 42, the heat exchange rate is poorer than when the opening 42 is formed on both sides.

In addition, the opening 42 does not necessarily need to be formed continuously along the length direction on the side of the heat conductive member 4. For example, the opening 42 may be formed intermittently along the length direction on the side of the heat conductive member. However, when the opening 42 is formed intermittently, the flow of radiant heat into and out of the punch hole 41 and the external space is restricted, so the heat exchange rate is poorer than when the opening 42 is formed continuously.

In addition, the opening 42 does not necessarily need to be formed on the side of the thermally conductive member. For example, a plurality of through holes may be formed at any position of the main body 40 within a range where the flow of radiant heat into and out of the punch hole 41 is not blocked.

Furthermore, in the embodiment of the present invention, the heat conductive member 4 has an opening 42 disposed in a direction orthogonal to the width direction of the panel body 2 (the direction in which the opening 42 faces the external space), so that heat exchange due to convection heat is limited. On the other hand, heat exchange due to radiant heat between the punch hole 41 and the external space can be actively performed.

For example, when the heat conducting member 4 is arranged in a direction parallel to the width direction of the panel body 2, heat exchange due to convection heat is promoted, but heat exchange due to radiation heat is restricted. Therefore, the arrangement direction of the heat conducting member 4 can be changed appropriately according to the conditions of the installation space where the radiation panel 1 is installed.

Next, the radiation panel according to the embodiment of the present invention is used as an example, and the radiation panel using a heat conducting member according to the prior art as shown in FIG. 6 is used as a comparative example, and the experimental results comparing the heating performance and the cooling performance are described.

In addition, this experiment was carried out in accordance with Annex A of JIS A1400:2007 (Natural convection and radial radiators for heating - Performance test methods). As for the temperature conditions of the heat medium, cold water of 7°C was used in the cooling test, and hot water of 50°C was used in the heating test. In addition, the inner diameter of the flow path of the refrigerant pipe through which the heat medium flows was a 12mm component, and the inner diameter of the flow path of the heat medium flow pipe was a 35mm component. The cooling capacity Q (W) and the heating capacity Q (W) were measured for the flow rate of the heat medium at 5L/min, 6L/min, 7.5L/min, 8.5L/min, and 10L/min, respectively, in both the embodiment and the comparative example.

Here, Q(W) is obtained from the power of heat absorption/dissipation (heat absorption/dissipation power) at the temperature difference T. In addition, the density ρ of water is 1.00×106 (g/m ³ ) at 7°C and 9.90×105 (g/m ³ ) at 50°C, and the value of the constant pressure specific heat capacity α is 4.20 (J(K・g)) at 7°C and 4.18 (J(K・g)) at 50°C. Q(W) is calculated from the temperature difference ΔT (°C) between the panel inlet and outlet and the flow rate of the heat medium per minute L (l/min) using the following formula. Q(W)=ρLαΔT/(1000×60)

Fig. 5 is a graph showing the experimental results comparing the heating performance and cooling performance of the radiation panels of the embodiment and the comparative example. As shown in Fig. 5, firstly, with regard to the cooling capacity, it can be understood that both the embodiment and the comparative example increase the flow rate of the heat medium and increase the cooling capacity, and the embodiment increases the cooling capacity by about 20% in the range of the heat medium flow rate of 5 to 7.5 L/min and increases the cooling capacity by about 25% in the range of the heat medium flow rate of 8.5 to 10 L/min compared to the comparative example.

In addition, regarding the heating performance, similar to the cooling performance, both the embodiment and the comparative example increase the flow rate of the heat medium and the heating capacity. Moreover, regarding the heating capacity, it can be understood that the difference between the embodiment and the comparative example is more significant than the cooling capacity, and the improvement is about 30% in the range of the heat medium flow rate of 5 to 7.5 L/min, and about 35% in the range of the heat medium flow rate of 8.5 to 10 L/min.

As described above, when the embodiment and the comparative example are compared, the improvement in both the heating capacity and the cooling capacity can be confirmed, and the heat conductive component 4 involved in the embodiment of the present invention can be confirmed to have a significant effect compared to the previous structure.

As described above, the heat conducting member and the radiation panel according to the present invention can promote heat exchange with the outside through efficient radiation and improve the comfort of the user.

1: Radiation panel 2: Panel body 3: Support 4: Heat conducting member 40: Body 40a: 1st body 40b: 2nd body 41: Punch hole 42: Opening 43: Insertion hole 44: Recess 45: Protrusion 46: Fin 47: Fixing groove 48: Front 49: Back 5: Heat medium flow pipe 6: Refrigerant pipe 7: Upper cover 8: Drain pan 9: Lower cover

[Figure 1] is a front view showing the overall structure of the radiation panel involved in the embodiment of the present invention. [Figure 2] is an enlarged view from the upper side of the panel body involved in the embodiment of the present invention. [Figure 3] is a top view of the heat transfer component involved in the embodiment of the present invention. [Figure 4] is a diagram showing the heat transfer mechanism around the heat transfer component, (a) showing the state during heating, and (b) showing the state during cooling. [Figure 5] is a diagram showing the heating capacity of the embodiment and the comparative example, and the experimental results of the cooling capacity. [Figure 6] is a top view of the heat transfer component involved in the prior art.

4: Heat conducting components

40: Headquarters

40a: Part 1

40b: Part 2

41: Punching hole

42: Opening

43: Insert through the hole

44: Concave part

45: protruding piece

46: Fins

47:Fixed slot

48: Front part

49: Back

Claims (8)

A heat-conducting component is a heat-conducting component constituting a panel body of a radiation panel. The heat-conducting component has a long strip-shaped body portion, and a punch hole portion and a through hole for a heat medium flow pipe to pass through are formed inside the body portion along the length direction. The body portion is formed with an opening portion for connecting the punch hole portion with the outside, and fixing grooves for inserting a fixture are provided at the four corners of the body portion. The fixture is used to fix the body portion to the panel body. The heat-conducting component as recited in claim 1, wherein the aforementioned opening portion is formed continuously along the length direction of the aforementioned main body portion. The heat-conducting component as recited in claim 1 or 2, wherein, the aforementioned main body is composed of a first main body and a second main body having substantially similar shapes in the axial direction of the aforementioned insertion hole, the aforementioned first main body is formed with a first punch hole portion connected to the outside through a first opening portion, and the aforementioned second main body is formed with a second punch hole portion connected to the outside through a second opening portion. The heat-conducting component as recited in claim 3, wherein the first main body portion and the second main body portion are composed of separable halves. The heat-conducting component as recited in claim 1 or 2, wherein the main body is integrally formed by extrusion molding of aluminum and the surface is anodized. A heat-conducting component as recited in claim 1 or 2, wherein the surface of the main body is corrugated with fins protruding in the length direction and formed into a wave shape at predetermined intervals in the width direction. A radiation panel comprises: a pair of left and right pillars, which are vertically arranged on a setting surface; and a panel body, on which heat-conducting components are arranged in parallel along a predetermined direction between the pillars. The heat-conducting component has a long body portion, and a punch hole portion and a through hole for a heat medium flow pipe to pass through are formed inside the body portion along the length direction. The body portion is formed with an opening portion for connecting the punch hole portion with the outside, and fixing grooves for inserting a fixture are provided at the four corners of the body portion, and the fixture is used to fix the body portion to the panel body. The radiation panel as described in claim 7, wherein the opening is formed on one side of the main body and the other side opposite to the one side, and is open in a direction intersecting at a predetermined angle relative to the parallel arrangement direction of the heat conducting components.

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