JP2019120437A - Heat insulation chamber - Google Patents

Abstract

To provide a seal structure of pipelines which facilitates assembly work of a heat insulation box body, and which can hold the pipelines at a right arrangement position, in a heat insulation chamber having the heat insulation box body.SOLUTION: A refrigerator, which is one example of a heat insulation chamber, includes: a heat insulation box body having a heat insulation layer inside; a refrigerant pipeline 31 passing inside the heat insulation layer; and a seal structure A provided around the refrigerant pipeline 31 extending from the inside of the heat insulation box body to the outside. The seal structure A includes: a seal member 43 mounted on the heat insulation box body; and a covering material 44 for covering an outer periphery of the refrigerant pipeline 31. In the seal structure A, the covering material 44 is arranged inside a recess part 43a formed in the seal member 43, and the width W of the covering material 44 and the refrigerant pipeline 31 has a maximum value Wmax on the depth side of the recess part 43a, in the recess part 43a.SELECTED DRAWING: Figure 6

Description

  TECHNICAL FIELD The present disclosure relates to a thermal insulation storage, and more specifically, to a seal structure of piping of the thermal insulation storage.

  Insulating containers such as refrigerators and thermal storage containers are provided with a thermal insulation box covering the outer periphery of the storage space to insulate the interior of the storage space (for example, a refrigerator compartment, a freezer compartment, a thermal storage room, etc.) from the external environment. There is. The outer shape of the heat insulation box is formed, for example, by an outer case and an inner case. And the heat insulation layer comprised with a foaming heat insulating material, such as a foaming polyurethane, a vacuum heat insulating material, etc. is formed in the inside of a heat insulation box.

  Moreover, the heat insulating storage which has a cooling function, such as a refrigerator, is equipped with the machine room for installing a compressor etc. Usually, the machine room is arranged outside the heat insulation box in order to insulate from the storage space such as the cold room or the freezer room. Therefore, pipes such as suction pipes and capillary tubes that connect between the compressor installed in the machine room and various devices such as the heat insulation box and the evaporator (cooler) installed on the storage space side are thermally insulated. It extends through the layer to the machine room side.

  In the piping part which penetrates the heat insulation layer and extends to the machine room side, a sealing material or the like is provided around the piping in order to suppress the leakage of the foamed heat insulating material and the reduction of the heat insulation performance.

  For example, in the piping guide device of the vending machine disclosed in Patent Document 1, the connection pipe 13 extending from the rear heat insulating wall 20 at the rear of the control unit 18 to the machine room 5 has a round foam 14 (seal material Equivalent). In addition, a U-shaped cut 23 having the same curvature as that of the round foam 14 is formed in the notch 22 of the rear heat insulating wall 20. Then, the connection pipe 13 wrapped in the round foam 14 is disposed in the U-shaped notch 23, and the seal putty 16 is applied on the top thereof.

Japanese Patent Application Laid-Open No. 10-160323

  By the way, in order to maintain sealability and heat insulation, the seal material wound around the pipe is often formed of a material having a certain thickness and elasticity. If the piping in which such a sealing material is wound is arranged inside the incision formed in the heat insulation box, the piping may pop out of the incision due to the repulsive force of the sealing material and may float up. As a result, the workability at the time of assembling the heat insulation box may be reduced.

  In addition, if the heat insulation box is assembled in a state where the piping is not placed at the correct arrangement position, there is a possibility that the foamed heat insulating material leaks or the heat insulation property is lowered.

  Therefore, it is an object of the present invention to provide a heat insulating container having a pipe seal structure which can facilitate the assembling work of the heat insulating box and can hold the pipe at the correct arrangement position.

  The heat insulating container according to one aspect of the present invention is provided around a heat insulating box having a heat insulating layer inside, a pipe passing through the inside of the heat insulating layer, and the pipe extending from the inside to the outside of the heat insulating box. And a sealed structure. The seal structure includes a seal member attached to the heat insulation box and a covering material covering an outer periphery of the pipe. In the seal structure, the covering material is disposed in a recess formed in the sealing member, and the width of the covering material and the pipe in the recess has a maximum value on the far side of the recess. doing.

  In the heat insulating case according to one aspect of the present invention described above, in the seal structure, the maximum value of the area of the horizontal cross section of the recess may be located on the back side of the recess.

  In the heat insulating container according to one aspect of the present invention described above, the covering material may have projecting portions extending to both left and right sides of the diameter of the pipe in the width direction of the recess.

  In the heat insulating container according to one aspect of the present invention, the covering material is formed of at least one sheet-like member, and is formed by bonding the sheet-like members in a state in which the pipe is sandwiched therein. It may be

  In the heat insulating container according to one aspect of the present invention, the length T of the overhanging portion may be larger than the thickness t of the covering material.

  The heat insulating container according to one aspect of the present invention has the above-described piping seal structure, so that the heat insulating box can be more easily assembled. In addition, according to the configuration of the heat insulating storage according to one aspect of the present invention, the pipe can be held at the correct arrangement position.

It is an exploded perspective view showing the composition of the heat insulation box which constitutes the refrigerator concerning one embodiment of the present invention. It is a perspective view which shows the internal structure of a machine room periphery of the heat insulation box which comprises the refrigerator concerning one Embodiment of this invention. It is a cross-sectional schematic diagram which shows the internal structure of the refrigerator concerning one Embodiment of this invention. It is a cross-sectional schematic diagram which shows the structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning 1st Embodiment, and a coating material. It is a schematic diagram which shows the seal structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning 1st Embodiment. It is a cross-sectional schematic diagram which shows the seal structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning 1st Embodiment. This figure is a figure which shows the cross-section of the XX part of a structure shown in FIG. It is a cross-sectional schematic diagram which shows the seal structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning 1st Embodiment. This figure is a figure which shows the cross-section of the YY line part of a structure shown in FIG. It is a cross-sectional schematic diagram which shows the structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning 2nd Embodiment. It is a cross-sectional schematic diagram which shows the seal structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning 2nd Embodiment, and a coating material. It is a schematic diagram which shows the structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning a comparative example. It is a cross-sectional schematic diagram which shows the seal structure of the refrigerant | coolant piping in the heat insulation box of the refrigerator concerning a comparative example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description about them will not be repeated.

First Embodiment
In the first embodiment, a refrigerator will be described as an example of the heat insulating storage of the present invention. In addition, the heat insulation storage concerning this invention is not limited to a refrigerator, It can also implement | achieve as a heat storage storage.

(Overall configuration of the refrigerator)
First, the whole structure of the refrigerator 1 which concerns on this embodiment is demonstrated, referring FIG. The internal configuration of the refrigerator 1 is shown in FIG. The refrigerator 1 is provided with storage spaces such as a refrigerator compartment 11 and a freezer compartment 12.

  Moreover, as shown in FIG. 3, the doors (for example, the refrigerator compartment door 11a, the freezer compartment door 12a, etc.) which can be opened and closed are respectively provided on the front (left side in FIG. 3) of each storage space of the refrigerator 1 There is.

  In the present embodiment, the surface provided with the door is taken as the front of the refrigerator. And each surface of the refrigerator 1 is made into the upper surface 1a, a side surface, the back surface 1c, and the bottom surface 1d on the basis of a front surface (refer FIG. 3). Therefore, in the present specification, when defining as “front side” or “back side”, the side on which the front or back is provided with reference to any position, or from any position to the front or back It means the direction. Further, in the present specification, when defining “bottom side” or “bottom side”, the side on which the bottom is provided with reference to an arbitrary position or the direction from the arbitrary position toward the bottom means.

  Inside the refrigerator 1 is provided a refrigeration cycle. The refrigeration cycle includes a cooler (evaporator) 21, a compressor 22, a condenser (not shown), and an expander (not shown) as main components. These constituent members are connected via a refrigerant pipe (pipe) 31 through which the refrigerant flows. A flow path from the discharge side of the compressor 22 to the expander in the refrigerant pipe 31 constitutes a heat radiation pipe 25. As a result, a relatively high temperature refrigerant flows in the heat radiation pipe 25. A refrigerant pipe 31 (shown in FIGS. 1 and 2) from the cooler 21 to the suction side of the compressor 22 constitutes a suction pipe (suction pipe).

  The heat radiation pipe 25 is stretched around the periphery of the refrigerator 1. As described above, since the heat radiation pipe 25 through which the relatively high temperature refrigerant flows is disposed on the outer periphery of the refrigerator 1, the heat exchange with the outside air is promoted to effectively cool the refrigerant. Moreover, in the outer peripheral surface of the refrigerator 1 etc., the dew condensation which may generate | occur | produce due to the temperature difference between the inside of a compartment and the exterior can be suppressed.

  As shown in FIG. 3, the cooler 21 is disposed in a cooling chamber 35 provided on the back side of the refrigerator 1. The cooling chamber 35 is disposed behind each storage space. In the cooling chamber 35, in addition to the cooler 21, a cooling fan 33 and the like are provided. The cooling fan 33 is provided to circulate air between the cooling chamber 35 and each storage space. That is, the cooling fan 33 sends the cold air generated by the cooler 21 at the time of operation of the refrigeration cycle, etc. to each storage space via each flow path, and cools the cold air supplied to each storage room, Return to room 35. Further, as shown in FIG. 3, the compressor 22 is disposed in a machine room 30 provided on the back side of the bottom of the refrigerator 1.

(Structure of heat insulation box)
The refrigerator 1 is provided with the heat insulation box 50 as a heat insulation structure for thermally insulating each storage space from the circumference (refer FIG. 3). The heat insulation box 50 is provided to cover the outer periphery of the refrigerator 1. As shown in FIG. 3, the heat insulation box 50 mainly includes an outer case 40, an inner case 60, and a heat insulation layer 51. FIG. 1 shows the members constituting the outer shape of the heat insulation box 50 (the main body 40 and the back plate 41 of the outer box, the inner box 60, and the bottom plate 42) in a disassembled state.

  The outer case 40 forms the outer peripheral surface of the heat insulation box 50. The outer box 40 also partially forms the outer shape of the refrigerator 1. The outer case 40 is composed of a main body portion 40 constituting a side surface and an upper surface 1a portion, and a back plate 41 constituting a back surface 1c portion.

  The inner box 60 forms an inner circumferential surface of the heat insulating box 50. Moreover, the inner box 60 forms the inner wall of each storage space (for example, the refrigerator compartment 11, the freezer compartment 12, etc.).

  In addition, a bottom plate 42 is provided at the bottom of the heat insulating box 50. The bottom plate 42 mainly forms the bottom surface 1 d of the refrigerator 1. Further, the back side of the bottom plate 42 is bent to the upper side and the back side to form the inner wall of the machine room 30. The upper end of the bottom plate 42 on the back side is provided with a cutaway portion 42 a cut in a concave shape. A seal member 43 is provided at the upper end portion on the back side of the bottom plate 42. The seal member 43 is formed of an elastic member such as a sponge material such as urethane, a rubber material, and a silicone material. The seal member 43 is in close contact with the lower end portion 41 a of the back plate 41 of the outer case 40. Thereby, a seal structure is formed, and it can suppress that the heat insulating material which comprises the heat insulation layer 51 in the heat insulation box 50 leaks out.

  As will be described later, in the seal member 43, a plurality of recesses (grooves) 43a are formed along the cutouts 42a of the bottom plate 42 (see FIG. 2). Various pipes (refrigerant piping 31, electrical harness, etc.) are led to the machine room 30 and the like outside the heat insulating layer 51 through the inside of the recess 43a.

  Further, on the back side of the bottom of the heat insulating box 50, a space for arranging the machine room 30 is formed. That is, the machine room 30 is disposed outside the heat insulation box 50. This is because the temperature in the machine room 30 rises by operating the compressor 22.

  According to the above configuration, as shown in FIG. 3, the machine room 30 and the freezing room 12 are separated by the heat insulation box 50. Therefore, heat generated in the machine room 30 can be suppressed from flowing into the freezing room 12.

  The heat insulating layer 51 is provided in the space between the outer case 40 and the inner case 60. The heat insulating layer 51 is configured of, for example, a vacuum heat insulating material and a foam heat insulating material. The vacuum heat insulating material is a sheet-like or plate-like heat insulating material. The foamed heat insulating material can be formed of, for example, foamed polyurethane.

  Further, in a space between the outer case 40 and the inner case 60, a refrigerant pipe 31 constituting a refrigeration cycle is disposed. For example, a refrigerant pipe 31 connecting the cooler 21 or the like disposed in the cooling chamber 35 and the compressor 22 disposed in the machine chamber 30 is disposed on the back surface portion of the heat insulation box 50. The refrigerant pipe 31 passes between the bottom plate 42 and the seal member 43 and extends from the heat insulating layer 51 to the machine chamber 30 side.

  A covering material 44 is attached to a boundary between the refrigerant pipe 31 located on the heat insulation layer 51 side and the refrigerant pipe 31 located on the machine chamber 30 side. The covering material 44 is provided so as to cover the outer periphery of the refrigerant pipe 31. The covering material 44 is formed of an elastic member such as a sponge material such as urethane, a rubber material, and a silicone material. As described later, the covering material 44 is fitted into the recess 43 a of the sealing member 43. Thereby, a seal structure is formed.

  Moreover, the heat radiation pipe 25 comprised by a part of refrigerant | coolant piping 31 is spread around each place in a heat insulation layer.

  The heat insulation box 50 is manufactured, for example, as follows. First, the vacuum heat insulating material is bonded and fixed to the outer case 40 or the inner case 60 in advance. Then, the main body 40 of the outer box and the inner box 60 are combined. At that time, as shown by the arrow in FIG. 1, a bottom plate 42 constituting the bottom surface 1 d of the refrigerator 1 is also attached. At this time, a portion of the refrigerant pipe 31 covered with the covering material 44 is fitted into the recess 43 a of the seal member 43 of the bottom plate 42 (see FIG. 2). Thereby, the refrigerant pipe 31 is fixed to the heat insulation box 50.

  Next, the back plate 41 is attached so as to cover the back of the heat insulation box 50. When the back plate 41 is attached to the main body portion of the heat insulating box 50, the back plate 41 and the seal member 43 of the bottom plate 42 are in close contact with each other. Thereby, a seal structure is formed.

  Then, the raw material of a liquid foam insulating material is inject | poured from the injection port formed in the backplate 41 in the state which made the back surface 1c of the heat insulation box 50 upward. After being injected in the space between the outer case 40 and the inner case 60, the injected raw material of the foam insulation material hardens. Thereby, the inside of the heat insulation box 50 will be in the state with which the heat insulation layer 51 was filled.

  The heat insulation box 50 is manufactured as mentioned above. In addition, the manufacturing method of the heat insulation box 50 demonstrated here is an example, and the manufacturing method of a heat insulation box is not limited to this method.

(About seal structure)
Subsequently, a more detailed configuration of the seal structure will be described with reference to FIG. FIG. 2 is an enlarged view of a bottom portion of the heat insulation box 50 shown in FIG. In one example, the seal structure is present at the bottom of the heat insulation box 50 (that is, at the boundary with the machine room 30). FIG. 2 shows the state before the seal structure is formed, that is, the state before the refrigerant pipe 31 and the covering material 44 are fitted into the recess 43 a of the seal member 43 (circle frame portion in FIG. 2).

(About seal structure B)
Here, before describing the seal structure A of the refrigerant pipe in the refrigerator 1 according to the present embodiment, the seal structure B of the refrigerant pipe to be compared will be described with reference to FIGS. 10 and 11. FIG. 10 shows a state before the seal structure B is formed. FIG. 11 shows a state in which the seal structure B is formed.

  As shown in FIG. 10, in the seal structure B, a covering material 344 is provided in a roll shape with respect to the refrigerant pipe 31. The covering material 344 is formed of, for example, a rectangular sheet member having a predetermined thickness and provided with an adhesive surface on one side. Then, the adhesive material of the sheet member is adhered to a part of the refrigerant pipe 31 and then wound, whereby the covering material 344 is formed.

  Further, the other of the seal structure B is formed at the upper end portion of the bottom plate 42 with a seal member 43 extending in the left-right direction (from one side surface to the other side surface of the refrigerator 1). Specifically, a seal structure B is formed by a recess 43 a formed by bending a part of the seal member 43 along the notch 42 a of the bottom plate 42. As shown in FIG. 10, in the state before the seal structure B is formed, the recess 43a is in a state in which a cut is formed in a part of the seal member 43. In the example shown in FIG. 10, another recess is formed next to the recess 43a. The electrical harness is inserted into the recess.

  The seal structure B is formed by inserting the refrigerant pipe 31 covered with the covering material 344 into the recess 43a (in the direction of the arrow shown in FIG. 10) in the process of assembling the heat insulation box 50.

  In the state in which the seal structure B is formed, the thickness of the covering material 344 is entirely compared with that before being inserted into the recess 43a by the elastic force from the recess 43a formed by the elastic seal member 43. It becomes thinner (see FIG. 11). In particular, since the covering material 344 is pulled in the direction opposite to the inserting direction by the friction between the covering material 344 and the seal member 43 at the time of insertion, the covering contacting the periphery of the back side of the recess 43a (the side far from the opening of the recess 43a) In the material 344, thinning of the covering material 344 is remarkable.

  In FIG. 11, the force with which the seal member 43 forming the recess 43a pushes the covering material 344 is indicated by a solid arrow. This force acts in a direction perpendicular to the surface of the U-shaped recess 43a. Further, in FIG. 11, the force with which the covering material 344 covering the refrigerant pipe 31 presses the seal member 43 is indicated by a broken arrow. The coating material 344 has a reaction of the pressing force of the seal member 43 (solid arrow) and the force in the vertical direction (broken arrow) on the outer circumferential surface of the coating 344. Thereby, a force acts on the covering material 344 in the direction of being pushed out from the recess 43a. Furthermore, as described above, due to the friction with the seal member 43, the covering material 344 is pulled in the direction opposite to the insertion direction, that is, in the direction of being pushed out from the recess 43a.

  As described above, from the seal member 43 provided on the bottom plate 42, a force that causes the refrigerant pipe 31 to repel from the recess 43a acts by its elastic force. In addition, in the covering material 344 covering the refrigerant pipe 31, a force that pushes the surface of the recess 43a is generated by its elastic force, and acts to lift the refrigerant pipe 31 by a reaction.

  As a result of the above-described force acting, the refrigerant piping 31 around which the covering material 344 is wound is difficult to insert deep into the recess 43a and maintain the inserted state. Therefore, compared with seal structure A described later, the covering material 344 is exposed in a larger area from the opening of the recess 43a. As a result, the force acting in the direction of narrowing the opening from both side surfaces of the recess 43a is weakened, and the refrigerant pipe 31 is more likely to jump out of the recess 43a.

  Therefore, floating of the refrigerant pipe 31 from the seal member 43 is likely to occur at the time of assembly of the heat insulating box 50. Therefore, the workability at the time of assembling of the heat insulation box may be reduced. In addition, positional deviation of the refrigerant pipe 31 from the concave portion 43a is likely to occur, and the possibility of the heat insulating material leakage due to the seal failure also increases.

(About seal structure A)
On the other hand, in the refrigerator 1 according to the present embodiment, the refrigerant pipe 31 is installed in the heat insulation box 50 by the seal structure A. Below, seal structure A of refrigerant piping 31 in refrigerator 1 concerning this embodiment is explained, referring to Drawings 4-7.

  FIG. 4 shows a state before the seal structure A is formed, that is, a cross-sectional structure of the refrigerant pipe 31 and the covering material 44 before being fitted into the recess 43 a of the seal member 43. FIG. 5 is a plan view of the seal structure A as viewed from above the recess 43a. 6 and 7 show the cross-sectional configuration of the seal structure A. FIG. FIG. 6 shows a cross-sectional configuration of an XX line portion of the seal structure A shown in FIG. FIG. 7 shows a cross-sectional configuration of the Y-Y line portion of the seal structure A shown in FIG.

  The covering material 44 forming the sealing structure A is formed of a single sheet-like member. The sheet-like member is formed of an elastic member such as a sponge material such as urethane, a rubber material, and a silicone material. Then, as shown in FIG. 4, the covering material 44 is formed by bonding sheet-like members in a state in which the refrigerant pipe 31 is sandwiched inside. Specifically, in the present embodiment, the covering material 44 is formed by bending one rectangular sheet-like member and bonding the sheet-like members facing each other in a state in which the refrigerant pipe 31 is sandwiched inside. . In another example, the refrigerant pipe 31 may be sandwiched between two sheet-like members, and the sheet members may be pasted together to form the covering material 44.

  Thus, the covering material 44 having the projecting portions 44 a and 44 a is formed on the left and right sides of the center C of the inner diameter of the refrigerant pipe 31. It is preferable that the projecting portions 44a and 44a extend in a direction substantially perpendicular to the insertion direction (the arrow direction in FIG. 4) of the sealing member 43 into the recess 43a. Thus, in a state where the seal structure A is formed, the restoring force of the projecting portions 44a and 44a is more efficiently transmitted to the side surfaces on both sides of the recess 43a (side surfaces in the direction perpendicular to the depth direction of the recess 43a). Can.

  Further, as shown in FIG. 4, the covering material 44 covering the refrigerant pipe 31 has a flat shape in a direction (horizontal direction in the drawing) in which the cross-sectional shape intersects with the insertion direction into the recess 43 a. More specifically, the lengths T1 and T2 (the distance from the contact portion with the refrigerant pipe 31 to the end portion) of the overhang portions 44a and 44a are the thickness t of the sheet member forming the covering member 44 (more specifically) Specifically, in the sealing structure A, it is preferable that the thickness t) of the covering material 44 positioned on the bottom surface side of the recess 43 a be larger than that of the covering material 44. Thus, when the thickness t is a relatively small value, the distance between the bottom of the recess 43 a and the refrigerant pipe 31 can be reduced. Therefore, the refrigerant pipe 31 can be fitted into the recess 43a deeper (closer to the bottom).

  Further, it is preferable that the lengths T1 and T2 of the respective overhang portions 44a and 44a be substantially the same. As a result, in the seal structure A, the same degree of force can be applied to the both side surfaces of the recess 43a from the projecting portions 44a and 44a.

  The covering material 44 having the above-described configuration is inserted into the recess 43 a of the sealing member 43. When inserting the covering material 44 and the refrigerant pipe 31 into the recess 43a, the protruding portions 44a and 44a are fitted in the recess 43a in a state of being bent toward the recess 43a. Thereby, the seal structure A as shown in FIGS. 5 to 7 is formed.

  FIG. 5 shows a state in which the seal structure A is viewed from the back side of the heat insulating box 50 with the bottom plate 42 attached to the inner box 60. In FIG. 5, the upper side is the heat insulation layer 51 side, and the lower side is the machine room 30 side. Further, in FIG. 5, the upper end of the bottom plate 42 is indicated by a broken line.

  As shown in FIG. 5, in the state in which the seal structure A is formed, a part of the covering material 44 is exposed from the gap (opening of the recess 43 a) of the seal member 43. Further, on the heat insulating layer 51 side and the machine room 30 side with the sealing member 43 interposed therebetween, the projecting portions 44a and 44a of the covering material 44 project to the left and right sides of the recess 43a. Thus, the refrigerant pipe 31 can be suppressed from moving in the vertical direction.

  FIG. 6 shows the cross-sectional configuration of the seal structure A in the recess 43a. As described above, in the state in which the seal structure A is formed, the protruding portions 44a and 44a of the covering material 44 are bent and present on the back side of the recess 43a. As a result, the lateral width W of the covering material 44 and the refrigerant pipe 31 in the recess 43a is configured to have the maximum value Wmax on the back side of the recess 43a. Here, the lateral width W of the covering material 44 and the refrigerant pipe 31 means the width in the radial direction of the refrigerant pipe 31 (or the longitudinal (stretching) direction of the seal member 43). Further, the back side of the recess 43a means a side closer to the back side of the recess 43a than the center C of the diameter of the refrigerant pipe 31 (in FIG. 6, the lower side than the center C).

  Further, in other words, in the recess 43a, the width W of the front side (the lower side in FIG. 6) of the covering material 44 in the insertion direction is the width of the rear side (the upper side in FIG. 6) in the insertion direction. It can be said that it is larger than W.

  In FIG. 6, in a state in which the seal structure A is formed, the force with which the seal member 43 forming the concave portion 43a pushes the covering material 44 is indicated by a solid arrow. This force acts in a direction perpendicular to the surface of the recess 43a. Further, in FIG. 6, the force with which the covering material 44 covering the refrigerant pipe 31 presses the seal member 43 is indicated by a broken arrow.

  The covering member 44 is provided with projecting portions 44 a corresponding to the respective side surfaces of the recess 43 a. As described above, the projecting portions 44a and 44a are bent and fitted to the back side of the recess 43a. Therefore, in the recess 43a, as indicated by the broken arrows, an elastic force acts in the direction in which the projecting portions 44a and 44a expand (substantially horizontal direction).

  On the other hand, from the surface of the concave portion 43a in contact with the respective projecting portions 44a, 44a, the elastic force pressing the respective projecting portions 44a, 44a in the direction perpendicular to the surface of the concave portion 43a substantially toward the center C of the refrigerant pipe 31 is work. A frictional force is generated between this elastic force and the elastic force of each of the projecting portions 44a and 44a acting in a substantially horizontal direction. As compared with the seal structure B, since the reaction of the force by which the protruding portions 44a and 44a push the recess 43a works in a substantially horizontal direction, the component of the force that pushes the refrigerant pipe 31 out of the recess 43a is small. Thereby, the structure in which the covering material 44 is hard to be pushed out from the recessed part 43a is realizable.

  When the refrigerant pipe 31 is inserted into the recess 43a, the covering material 44 and the recess 43a are inserted while being in sliding contact with each other. Stress remains in the covering material 44 and the recess 43a in the direction opposite to the insertion direction by friction, that is, in the direction of being pushed out from the recess 43a.

  On the other hand, in the seal structure B to be compared, stress in the direction of being pushed out from the recess 43 a remains on the entire contact surface of the covering material 344 and the recess 43 a.

  On the other hand, in the seal structure A, the refrigerant pipe 31 is inserted in a state in which the projecting portions 44a and 44a of the covering material 44 are folded forward in the insertion direction. The stress pushed out from the concave portion 43a remaining on the tip end side of the projecting portions 44a and 44a is generated at the back side position of the concave portion 43a. On the other hand, on the shallow side of the recess 43a, the amount of sliding contact with the covering material 44 is small, and the remaining stress becomes small. Therefore, the structure in which the covering material 44 is hard to be pushed out from the recessed part 43a is realizable.

  In addition, since the thickness t of the covering material 44 positioned on the bottom surface side of the recess 43a is relatively thin, the force for lifting the refrigerant pipe 31 (the reaction of the broken arrow) can be further reduced. Thereby, the seal structure A can be stabilized in a state where the refrigerant pipe 31 is positioned at a deeper position in the recess 43a. Further, in the seal structure A, the area of the opening of the recess 43 a is made smaller than the area of the opening of the recess 43 a in the seal structure B by fitting the refrigerant pipe 31 at a deeper position in the recess 43 a. Can.

  In FIG. 7, the cross-sectional structure of the seal structure A in the outer side (heat insulation layer 51 side) of the recessed part 43a is shown. As shown in FIG. 7, on the outer side of the recess 43a, the projecting portions 44a and 44a of the covering material 44 project to the left and right sides of the recess 43a. This can suppress the movement of the refrigerant pipe 31 in the vertical direction. Therefore, the refrigerant pipe 31 can be disposed in the recess 43a in a more stable state. Moreover, according to this configuration, when the heat insulating layer 51 is formed, the overhanging portions 44a and 44a of the covering material 44 with respect to the foam heat insulating material which is gradually foam-filled from the front side (the lower side in FIG. 7) of the refrigerator 1 Extends downward (in the front direction of the refrigerator 1) in the figure. Therefore, it works so as to block the flow in the upward direction (the back direction of the refrigerator 1) of the foam insulation, and the foam insulation can be more reliably sealed.

  Furthermore, in the seal structure A, the maximum value of the area of the horizontal cross section (the cross section in the direction perpendicular to the insertion direction) of the recess 43a is that of the recess 43a in the state where the covering material 44 and the refrigerant pipe 31 are disposed in the recess 43a. It is preferable to be located at the back side. According to this configuration, the covering material 44 and the refrigerant pipe 31 once fitted in the recess 43a can be made difficult to float up to the outside of the recess 43a.

  As described above, the covering material 44 has the projecting portions 44a and 44a extending to the left and right sides of the diameter of the refrigerant pipe 31 in the width direction of the recess 43a (longitudinal direction of the seal member 43). The respective projecting portions 44a and 44a of the covering material 44 project substantially horizontally to the left and right sides of the refrigerant pipe 31 before being inserted into the recess 43a of the sealing member 43. On the other hand, in the state where the covering material 44 is disposed in the recess 43a, the projecting portions 44a and 44a are folded to the back side of the recess 43a (see FIG. 6).

(Summary)
As described above, the refrigerator 1 according to the present embodiment includes the heat insulation box having the heat insulation layer 51 inside, the refrigerant pipe 31 passing through the inside of the heat insulation layer 51, and the machine room 30 from the inside of the heat insulation box 50. And a seal structure A provided around the refrigerant pipe 31 extending outward. The seal structure A includes an elastic seal member 43 attached to the heat insulation box 50 and a covering material 44 covering the outer periphery of the refrigerant pipe 31. In the seal structure A, the covering material 44 is disposed in the recess 43 a formed in the sealing member 43, and the width W of the covering material 44 and the refrigerant pipe 31 in the recess 43 a (stretching direction of the sealing member 43 Has a maximum value Wmax on the back side of the recess 43a.

  According to this configuration, when assembling the heat insulating box 50, the refrigerant pipe 31 and the covering material 44 can be fitted into the recess 43a of the seal member 43 in a stable state. That is, floating of the refrigerant pipe 31 from the seal member 43 is less likely to occur. Therefore, the possibility that the workability at the time of assembling the heat insulation box 50 may be reduced can be reduced. In addition, positional displacement of the refrigerant pipe 31 and the like are less likely to occur, and the possibility of the heat insulating material leaking due to the sealing failure can be reduced.

  Further, in the seal structure A, the maximum value of the area of the horizontal cross section of the recess 43a (when the covering material 44 and the refrigerant pipe 31 are disposed in the recess 43a) is located behind the recess 43a. You can also.

  In addition, the covering member 44 has projecting portions 44a and 44a extending to the left and right sides of the diameter of the refrigerant pipe 31 in the width direction of the recess 43a of the sealing member 43 (the extending (longitudinal) direction of the sealing member 43). Is preferred. According to this configuration, in a state where the seal structure A is formed, in the recess 43a of the seal member 43, an elastic force can be exerted in a direction in which the projecting portions 44a and 44a expand. Therefore, it is possible to make it difficult for the refrigerant pipe 31 to come out of the recess 43a.

  Further, the covering material 44 is preferably formed of at least one sheet-like member, and is formed by bonding the sheet-like members in a state in which the refrigerant pipe 31 is sandwiched inside. According to this configuration, the covering material 44 having a flat cross-sectional shape can be more easily formed. Moreover, according to this configuration, the covering material 44 can be formed by a sheet member having a smaller area and a smaller volume.

  Further, the lengths T1 and T2 of the overhanging portions 44a and 44a of the covering material 44 are the thickness t of the covering material 44 (more specifically, the thickness t of the covering material 44 located on the bottom of the recess 43a) It is preferable to be larger than the above. According to this configuration, the reaction force for lifting the refrigerant pipe 31 can be further reduced.

Second Embodiment
Subsequently, a second embodiment of the present invention will be described. In 2nd Embodiment, the structure of the covering material 144 which comprises seal structure A of the refrigerant piping 31 in the heat insulation box 50 of the refrigerator 1 differs from 1st Embodiment. The other configuration is basically the same as that of the first embodiment. So, in the second embodiment, only points different from the first embodiment will be described.

  In the refrigerator 1 according to the present embodiment, the refrigerant pipe 31 is installed in the heat insulation box 50 by the seal structure A, as in the first embodiment. Below, seal structure A of refrigerant piping in the refrigerator 1 concerning this embodiment is demonstrated, referring FIG. 8 and FIG.

  FIG. 8 shows a state before the seal structure A is formed, that is, a cross-sectional structure of the refrigerant pipe 31 and the covering material 144 before being fitted into the recess 43 a of the seal member 43. FIG. 9 shows the cross-sectional configuration of the seal structure A in the present embodiment. FIG. 9 is a view showing a cross-sectional structure of a portion corresponding to the XX line portion of FIG.

  The covering material 144 forming the seal structure A is formed of an elastic material such as a sponge material such as urethane, a rubber material, a silicone material, and a polystyrene foam. As shown in FIG. 8, the covering material 144 has a substantially triangular shape (for example, an equilateral triangle shape) in cross section. Specifically, the covering material 144 has bottom corner portions (projected portions) 144a and 144a and a top corner portion 144b based on the insertion direction of the sealing member 43 into the recess 43a.

  The covering material 144 is formed, for example, by forming an opening in the central portion of a substantially triangular prismatic member having elasticity and passing the refrigerant pipe 31 through the opening. Thereby, the covering material 144 which covers the outer periphery of the refrigerant | coolant piping 31 is obtained.

  The covering material 144 is inserted into the recess 43 a of the sealing member 43 in the direction indicated by the arrow in FIG. 8. That is, the width W1 of the front side of the covering material 144 in the insertion direction (lower side than the center C of the refrigerant pipe 31 in FIG. 8) is the rear side of the insertion direction (in FIG. 8, the center of the refrigerant pipe 31). It can be said that the width is larger than the width W2 of the upper side than C).

  In FIG. 9, the cross-sectional structure of the seal structure A in the recessed part 43a is shown. As described above, the covering material 144 has a lateral width W1 on the front side (back side of the recess 43a) in the insertion direction larger than a lateral width W2 on the rear side (opening side of the recess 43a) in the insertion direction. There is. As a result, the lateral width W of the covering material 144 and the refrigerant pipe 31 in the recess 43a is configured to have the maximum value Wmax on the back side of the recess 43a.

  The seal member 43 and the covering material 144 are both formed of an elastic material. Therefore, when the refrigerant pipe 31 and the covering material 144 are fitted into the recess 43a to form the seal structure A, the sealing member 43 and the covering material 144 exert an elastic force to each other.

  In FIG. 9, in a state in which the seal structure A is formed, the force with which the seal member 43 forming the recess 43 a presses the covering material 144 is indicated by a solid arrow. Moreover, in FIG. 9, the covering material 144 which covers the refrigerant | coolant piping 31 shows the force which presses the sealing member 43 by the arrow of a broken line.

  In the state where the seal structure A is formed, an elastic force is exerted to expand the bottom corner portions 144a and 144a of the covering material 144 covering the refrigerant pipe 31 (refer to the broken line arrow in FIG. 9), and tries to restore a triangular shape. Since this elastic force acts in a substantially horizontal direction, the frictional force between the covering material 144 and the seal member 43 becomes strong, and the refrigerant pipe 31 is less likely to come out of the recess 43 a.

  Further, when the refrigerant pipe 31 comes off from the recess 43a, the bottom corner portions 144a and 144a of the covering material 144 are dragged to the back side of the recess 43a by friction, and the overhanging portions 44a and 44a in the seal structure A of the first embodiment. The same shape as the shape of. Thereby, the structure in which the covering material 144 is hard to be pushed out from the recessed part 43a is realizable.

  Therefore, according to the configuration of the present embodiment, it is possible to fit the refrigerant pipe 31 and the covering material 44 into the recess 43 a of the seal member 43 in a stable state when the heat insulation box 50 is assembled. That is, floating of the refrigerant pipe 31 from the seal member 43 is less likely to occur. Therefore, the possibility that the workability at the time of assembling the heat insulation box 50 may be reduced can be reduced. In addition, positional displacement of the refrigerant pipe 31 and the like are less likely to occur, and the possibility of the heat insulating material leaking due to the sealing failure can be reduced.

  Moreover, in the seal structure A, the cross-sectional shape of the covering material 144 is an inverted wedge shape. Therefore, when the restoring force of the covering material 144 in the recess 43a becomes large and approaches the original triangular shape, it is possible to realize a structure that is less likely to come off the recess 43a due to the wedge effect.

Third Embodiment
Subsequently, a third embodiment of the present invention will be described. In 3rd Embodiment, the structure of the covering material 144 which comprises seal structure A of the refrigerant piping 31 in the heat insulation box 50 of the refrigerator 1 differs from 1st Embodiment. The other configuration is basically the same as that of the first embodiment. Thus, in the third embodiment, only points different from the first embodiment will be described.

  In the first embodiment described above, the covering member 44 is formed by bonding sheet members. However, the covering material is not limited to one formed by bonding sheet members. An opening may be formed at the center of the elastic member having a flat cross-sectional shape as shown in FIG. 4, and the refrigerant pipe 31 may be passed through the opening.

  Further, the seal structure A according to the present embodiment is provided not only to the refrigerant pipe 31 but also to various pipes led to the machine chamber 30 and the like outside the heat insulating layer 51 through the inside of the recess 43 a of the seal member 43. It can also be done. For example, the same covering material 44 or 144 may be provided also in the electrical harness.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the above description but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. Further, configurations obtained by combining the configurations of the different embodiments described in the present specification with one another are also included in the scope of the present invention.

1: Refrigerator (insulated storage room)
30: Machine room 31: Refrigerant piping (piping)
40: Outer case 43: Sealing member 43a: Recess 44: Coating 44a: Projection 50: Heat insulation box 51: Heat insulation layer 60: Inner box 144: Coating 144a: Bottom corner (projection)
A: Seal structure

Claims (5)

A thermal insulation box having a thermal insulation layer inside;
Piping through the inside of the thermal insulation layer,
And a seal structure provided around the pipe extending from the inside to the outside of the heat insulating box.
The seal structure includes a seal member attached to the heat insulation box and a covering material covering an outer periphery of the pipe.
In the sealing structure, the covering material is disposed in a recess formed in the sealing member,
The width of the said covering material and the said piping in the said recessed part has the maximum value in the back side of the said recessed part, The heat insulating storage.   The heat insulating storage according to claim 1, wherein in the seal structure, the maximum value of the area of the horizontal cross section of the recess is located on the back side of the recess.   The heat insulating container according to claim 1 or 2, wherein the covering material has an overhang portion extending to both left and right sides of a diameter of the pipe in the width direction of the recess. The covering material is
Formed of at least one sheet-like member,
The heat insulating container according to claim 3, wherein the sheet-like member is pasted together in a state in which the pipe is sandwiched inside.   The heat insulation cabinet according to claim 3 or 4 whose length T of said overhanging part is larger than thickness t of said covering material.

Images