JP7149488B2 - Cooling device and delivery box - Google Patents

Description

The present disclosure relates to a cooling device and a delivery box provided with the same.

2. Description of the Related Art Conventionally, there is a cooling device described in Patent Document 1. This cooling device comprises an integral Peltier module and a partition plate. The partition plate is provided to separate the heat absorption side and the heat dissipation side, and has a through hole in the center. The Peltier module includes a plate-shaped Peltier element, one side heat sink fixed to one side surface thereof, and the other side heat sink fixed to the other side surface, and the one side heat sink is fixed to the partition plate. With the Peltier module fixed to the partition plate, one heat sink is arranged on the heat absorption side and the other heat sink is arranged on the heat dissipation side. In this state, the Peltier element is arranged substantially parallel to the partition plate, and a part of the Peltier element is arranged in the through hole.

JP 2012-195567 A

In the cooling device described above, since the side surface of the Peltier element is exposed to the outside, heat is easily transferred from the outside air to the Peltier element.

Accordingly, an object of the present disclosure is to provide a cooling device and a delivery box in which the Peltier element is less likely to receive heat from the outside air and the cooling efficiency can be easily increased.

In order to solve the above problems, the cooling device of the present disclosure includes a first heat sink and a second heat sink that are arranged to face each other, a first fan that blows air to the first heat sink, and a second heat sink that blows air to the second heat sink. 2 fans, a first groove fixed to a first heat sink and a second heat sink in a state of being disposed therebetween, a first groove provided in a first facing surface facing the first heat sink, and a second heat sink facing the second heat sink. A resin case having a second groove provided on the opposing surface and a through hole having openings on the first opposing surface and the second opposing surface, a Peltier element housed in the through hole, and attached to the first groove and a second airtight material attached to the second groove.

According to the cooling device and the delivery box according to the present disclosure, the Peltier element is less likely to receive heat from the outside, making it easier to increase the cooling efficiency.

1 is a perspective view of a delivery box according to an embodiment of the present disclosure when viewed from the back side; FIG. 4 is a perspective view of a cooling device provided in the delivery box; FIG. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2; It is a perspective view of the Peltier module with which the said cooling device is provided. 2 is an exploded perspective view of the Peltier module; FIG. It is a perspective view of the resin-made case in the said Peltier module. It is a perspective view showing the said cooling device in the middle of an assembly. It is a perspective view showing the said cooling device in the middle of an assembly. It is a perspective view of the cooling side case part of the said cooling device. 4 is an enlarged cross-sectional view of the lower side in the height direction of the cooling device when the cross-sectional view of FIG. 3 is viewed from another angle; FIG. It is a perspective view when the drain pan of the said cooling device is seen from an upper side.

Embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that the characteristic portions thereof will be appropriately combined to construct a new embodiment. Further, in the following embodiments, the same reference numerals are given to the same configurations in the drawings, and redundant explanations are omitted. In addition, a plurality of drawings include schematic diagrams, and the dimensional ratios of length, width, height, etc. of each member do not necessarily match between different drawings. Also, in the following description and drawings, the X direction is the depth direction of the delivery box 1 (cooling device 10 ) and coincides with the thickness direction of the plate-shaped Peltier element 80 . The Y direction is the width direction of delivery box 1 (cooling device 10), and the Z direction is the height direction of delivery box 1 (cooling device 10). The X, Y and Z directions are orthogonal to each other. Further, in the following description, the front side is the side from which cool air from the cooling device 10 projects, and the back side is the side to which hot air from the cooling device 10 is exhausted.

FIG. 1 is a perspective view of a delivery box 1 according to an embodiment of the present disclosure when viewed from the back side. The delivery box 1 includes a main body 2 and a cooling device 10, and the main body 2 includes a refrigerator (not shown). The cooling device 10 is fixed to the main body 2 and has an outer surface portion 11 exposed to the outside on the back side of the main body 2 . The outer surface portion 11 includes an outer exhaust port 29 for discharging hot air to the outside. The structure of the cooling device 10 will be described in detail below with reference to FIG.

The refrigerator compartment is provided in the delivery box 1 for the following purposes, for example. More specifically, home delivery companies have started a business of delivering foodstuffs such as boxed lunches every day at the request of elderly households and dual-income households. Also, in such a case, the delivery box 1 needs to be provided with a refrigerating compartment, because the delivery is food and needs to be refrigerated. The refrigerator compartment is provided in the delivery box 1 for such purpose, for example. For this purpose, for example, a cylinder lock is provided on the door that shuts off the refrigerator compartment on the front side of the home delivery box 1 from the outside.

The key to unlock the cylinder lock is owned by the person concerned (residents, etc.) at the delivery destination, and also by a delivery company (hereinafter referred to as a specific delivery company) that delivers foodstuffs such as lunch boxes for a predetermined period (for example, every day). ). Therefore, the specific home delivery company can use the key to open the door, and can lock the cylinder lock with the door closed. On the other hand, other delivery companies (hereinafter referred to as unspecified delivery companies) do not have the key and cannot open and close the door. As a result, the specified home delivery company can reliably store foodstuff deliveries such as lunch boxes in the refrigerating compartment.

Alternatively, a refrigerating compartment may be provided in the delivery box 1 for handling deliveries that require refrigeration. In this case, the door that blocks the refrigerator compartment on the front side of the home delivery box 1 from the outside has, for example, an operation section inside for locking by an unspecified home delivery company or the like. In addition, for example, on the outside of the door, there is an open button for an unspecified home delivery company to open the door, a slip slot for inserting slips, a seal button for executing stamping, and a display indicating whether or not the door can be used. have a part.

In this case, for example, an unspecified home delivery company or the like can first press the open button of the home delivery box 1 whose door is closed, open the door, put the parcel into the refrigerator compartment, and use the operation unit to open the door. can be locked when closed. A home delivery company or the like can stamp a slip with a seal such as a shachihata type seal previously set in the main body of the home delivery box 1 by inserting the slip into the slip slot and pressing the seal button. In addition, when the luggage is put in and locked, the display part shows the indication that the door is in use. As a result, unless a resident or the like inputs a special key or password to take out the package, other packages cannot be accommodated.

Note that there are a wide variety of functions such as the function of storing parcels in the refrigerating compartment, the function of stamping slips, the function of taking out parcels, and the display function. Also, the home delivery box may have a timer function, and the cooling device may perform cooling at a predetermined time, while the cooling device may stop cooling at the predetermined time. Alternatively, the home delivery box may have a control device and a parcel detection sensor that detects the presence or absence of parcels to be delivered in the refrigerator compartment. Then, when the control device receives a signal representing detection of a load in the refrigerator compartment from the load detection sensor, the control device causes the cooling device to start refrigerating. cooling may be stopped. In this case, the baggage detection sensor may be a weight detection sensor including a strain gauge, or an optical sensor such as an infrared sensor. The timing at which the cooling device operates or stops may be any timing other than the timings described above.

2 is a perspective view of the cooling device 10, and FIG. 3 is a cross-sectional view taken along line AA of FIG. As shown in FIG. 3, the cooling device 10 includes a case 20, a Peltier module 60, a first fan 31, a second fan 32, a drain pan 35, a first curved plate 45, a second curved plate 50, an annular mounting plate 55, and a heat insulator 57 .

The case 20 has a cooling side case portion 21 and a heat dissipation side case portion 25 . As shown in FIG. 2, the cooling device 10 has a substantially rectangular parallelepiped outer shape. As shown in FIG. 3 , the substantially rectangular parallelepiped internal chamber 12 of the cooling device 10 is divided into two halves in the X direction by the front side plate 26 of the heat radiation side case portion 25 . The cooling side case portion 21 defines one cooling side chamber 22 of the halved internal chamber 12 , and the heat radiation side case portion 25 defines the other heat radiation side chamber 27 .

Referring to FIG. 1, cooling device 10 is attached to main body 2 so that cooling side chamber 22 is located inside delivery box 1, while heat radiation side chamber 27 protrudes from the back side of main body 2 of delivery box 1 to the back side in the X direction. . Most of the heat-dissipating-side case portion 25 other than the front side plate 26 constitutes the outer surface of the projecting portion 8 projecting from the main body 2 in the cooling device 10 . As shown in FIG. 3, the heat dissipation side case portion 25 has an outer intake port 28 on the back side in the X direction and on the upper side in the Z direction, and an outer exhaust port 29 on the back side in the X direction and on the lower side in the Z direction. As shown in FIG. 1 , the outer intake port 28 and the outer exhaust port 29 are provided on the rear surface of the projecting portion 8 in the X direction.

On the other hand, as shown in FIG. 3, the cooling-side case portion 21 has an inner intake port 23 on the front side in the X direction and the upper side in the Z direction, and an inner outlet 24 on the front side in the X direction and on the lower side in the Z direction. Although not shown, the surface 33 of the cooling-side case portion 21 constitutes part of the inner surface of the refrigerating compartment of the delivery box 1 . The inner air intake port 23 and the inner air outlet port 24 communicate the refrigerating chamber of the delivery box 1 with the cooling side chamber 22 of the cooling device 10 . The first fan 31 is mounted on the upper side in the Z direction inside the cooling side case so as to overlap the inner intake port 23 when viewed in the Z direction. The first fan 31 is composed of a suction fan, and when it operates, it takes in air from the refrigerating chamber and causes the taken-in air to flow in the cooling-side chamber 22 from the upper side to the lower side in the Z-direction, thereby moving the inside of the cooling-side chamber 22 in the Z direction. Generate a first wind that flows in a downward direction.

Also, the second fan 32 is mounted on the upper side in the Z direction inside the heat radiation side case so as to overlap the outer intake port 28 when viewed in the Z direction. The second fan 32 is composed of a suction fan, and when operated, takes in air from the outside of the delivery box 1 and causes the taken-in air to flow from the upper side to the lower side in the heat radiation side chamber 27 in the Z direction, so that the inside of the heat radiation side chamber 27 is to generate a second wind that flows downward in the Z direction. The operation of cooling device 10 will be described in detail later.

A through hole is provided in the front side plate 26 of the heat dissipation side case portion 25 . The Peltier module 60 is fixed to the case 20 so as to straddle the cooling and heat radiation side chambers 22 and 27 using the through holes. FIG. 4 is a perspective view of the Peltier module 60, and FIG. 5 is an exploded perspective view of the Peltier module. As shown in FIG. 4, the Peltier module 60 has a first heat sink 61, a second heat sink 65, and an element assembly 70. The first heat sink 61 and the second heat sink 65 are arranged to face each other. The device assembly 70 is secured to the first and second heat sinks 61, 65 while being positioned therebetween.

The first heat sink 61 is an integral member made of metal, and has a plate-like mounting portion 62 that is rectangular in plan view and a plurality of plate-like fins 63 . A plurality of plate-like fins 63 are arranged substantially parallel to each other with a slight gap in the Y direction, and each fin 63 is extended from the surface of the mounting portion 62 opposite to the element assembly side in the thickness direction of the element assembly 70 . extend to The second heat sink 65 is a metal integral member, and has a plate-like mounting portion 66 that is rectangular in plan view and a plurality of plate-like fins 67 . A plurality of plate-like fins 67 are arranged substantially parallel to each other with a slight gap in the Y direction, and each fin 67 is extended from the surface of the mounting portion 66 opposite to the element assembly side in the thickness direction of the element assembly 70 . extend to

As shown in FIG. 5 , the element assembly 70 includes a resin case 71 and a Peltier element 80 . The element assembly 70 further includes a pair of conducting wires 81 and 82, a cooling side O-ring 83 as a first airtight member, a heat radiation side O-ring 84 as a second airtight member, a pair of bushings 85 and 86, and a resin A cover 87 and a metal plate-like spacer 89 are provided. The Peltier element 80 has a square or rectangular plate shape in plan view, and the spacer 89 has a rectangular parallelepiped shape having the same size and shape as the Peltier element 80 in plan view.

6 is a perspective view of the case 71. FIG. As shown in FIG. 6, the case 71 has a flat mounting surface 79 on one side in the thickness direction, and screw holes 76 are provided at four corners of the mounting surface 79 . The case 71 has a through hole 72 penetrating in the thickness direction in the central portion. The through hole 72 has an element mounting hole portion 90 on one side in the thickness direction. An elongated wire compatible portion 92 is included.

The mounting surface 79 is provided with a second annular groove 74 that is a second groove. The mounting surface 79 constitutes a second opposing surface facing the second heat sink 65 . The central axis of the second annular groove 74 substantially coincides with the central axis of the element mounting hole portion 90 which is square or rectangular in plan view. A cylindrical inner peripheral surface 93 of the inner wall of the second annular groove 74 constitutes a part of the inner peripheral surface of the through hole 72 in the thickness direction, and the cylindrical inner peripheral surface 93 and the element mounting hole portion 90 are flat surfaces. It is connected via a stepped portion 94 made of.

The case 71 has four positioning protrusions 73 that protrude from the stepped portion 94 toward the cylindrical inner peripheral surface 93 in the thickness direction. Further, the element corresponding portion 91 is composed of four planar inner surfaces. The four positioning protrusions 73 correspond one-to-one to the four planar inner surfaces, and each positioning protrusion 73 extends from the cylindrical inner peripheral surface 93 side to the element corresponding portion 91 side in a direction orthogonal to the corresponding planar inner surface. It extends to the inner end of stepped portion 94 .

The case 71 has a plurality of screw holes 75 at positions overlapping the stepped portion 94 when viewed in the thickness direction. The case 71 also has a pair of conductor wire through-holes 77 and 78 having openings on the inner surface of the through-hole 72 and the outer surface of the case 71 . The pair of conductor wire through-holes 77 and 78 correspond to the pair of elongated conductor wire corresponding portions 92 one-to-one, and each conductor wire through-hole 77 and 78 is connected to the corresponding conductor wire corresponding portion 92 . Although not shown, the case 71 has a first annular groove 59 (see FIG. 3), which is a first groove, on the surface opposite to the mounting surface 79 side in the thickness direction. The facing surface 58 (see FIG. 3) opposite to the mounting surface 79 side in the thickness direction constitutes a first facing surface facing the first heat sink 61 . The first annular groove 59 is provided so as to surround the through hole 72 . The first annular groove 59 opens on one side in the thickness direction, and the second annular groove 74 opens on the other side in the thickness direction.

In the configuration described above, the Peltier module 60 is assembled, for example, as follows. Specifically, referring to FIG. 5, the Peltier element 80 is accommodated in the element corresponding portion 91 of the case 71, and the respective conductors 81 and 82 are electrically connected to the Peltier element 80, and the corresponding conductor corresponding portion 92 and the corresponding conductors are connected. through the through holes 77 and 78. Also, the spacer 89 is housed in the through hole 72 on the side of the positioning projection 73 so as to abut on the Peltier element 80 . Since the spacer 89 has the same size and shape as the Peltier element 80 in a plan view, it is positioned at the inner tip of the positioning projection 73 and cannot move relative to the case 71 . With the spacer 89 accommodated in the through hole 72 as described above, the cooling side O-ring 83 is attached to the first annular groove 59 and the heat radiation side O-ring 84 is attached to the second annular groove 74 . After that, the first screw (not shown) is screwed into the screw hole 75 and the screw hole 68 of the mounting portion 62, and then the second screw 69 (see FIG. 4) is screwed into the screw hole 76 and the screw hole of the mounting portion 66 ( (not shown). By tightening the first and second screws 69, the first heat sink 61, the second heat sink 65, the case 71, the Peltier element 80, the O-rings 83, 84 on the cooling and heat radiation side, and the spacer 89 are integrated. Finally, the bushings 85 and 86 are press-fitted so that there are no gaps between the corresponding conductor wire through-holes 77 and 78 and the conductor wires 81 and 82, and then the cover 87 is placed on the case so as to cover the bushings 85 and 86. 71 is screwed. The Peltier module 60 is assembled by this screwing.

As shown in FIG. 3, in the assembled state in which the Peltier module 60 is assembled, the X-direction front surface of the Peltier element 80 contacts the X-direction rear surface of the mounting portion 62 of the first heat sink 61 without any gap. In addition, in the assembled state, the back surface of the Peltier element 80 in the X direction is in contact with the surface of the spacer 89 in the X direction without gaps, and the back surface of the spacer 89 in the X direction is located in the mounting portion 66 of the second heat sink 65 in the X direction. It contacts the surface without gaps.

In addition, in the assembled state, the facing surface 58 of the case 71 facing the first heat sink 61 is in contact with the back surface of the mounting portion 62 without any gap, and is accommodated in the first annular groove 59 provided in the facing surface 58 . The side O-ring 83 is compressed in the X direction between the back surface of the mounting portion 62 and the bottom surface of the first annular groove 59 . As a result, the airtightness between the facing surface 58 and the back surface of the mounting portion 62 is excellent. In addition, in the assembled state, the mounting surface 79 as the second facing surface of the case 71 abuts the surface of the mounting portion 66 without gaps, and the heat dissipating side is accommodated in the second annular groove 74 provided in the mounting surface 79 . The O-ring 84 is compressed in the X direction between the surface of the mounting portion 66 and the bottom surface of the second annular groove 74 . As a result, the airtightness between the mounting surface 79 and the surface of the mounting portion 66 is excellent.

Further, referring to FIG. 3 , cooling side case portion 21 , heat dissipation side case portion 25 , Peltier module 60 , drain pan 35 , first curved plate 45 , second curved plate 50 , mounting plate 55 , and heat insulating material 57 is constructed as follows: First, the Peltier module 60 is assembled as described above. However, in this assembly, the Peltier module 60 is assembled with the element assembly 70 passing through the through hole of the mounting plate 55 . Therefore, the mounting plate 55 is positioned between the first heat sink 61 and the second heat sink 65 with the Peltier module 60 assembled.

Next, the drain pan 35 is placed on the bottom surface of the cooling-side case 21 so that the condensed water evaporator 36, which will be detailed later, faces upward in the Z direction and is positioned on the back side in the X direction. Subsequently, the concave back surface 51 of the second curved plate 50 faces the back side in the X direction, and the direction of the flow of the second wind flowing downward in the Z direction is smoothly changed from the bottom side in the Z direction to the back side in the X direction. The second curved plate 50 is arranged on the back side of the upper surface of the drain pan in the X direction so that As shown in FIG. 3, the drain pan 35 has a locking groove 37 extending in the Y direction on its upper surface. The lower end of the second curved plate 50 is locked in the locking groove 37 while the second curved plate 50 is placed on the upper surface of the drain pan 35 . Subsequently, the concave surface 46 of the first curved plate 45 faces the front side in the X direction, and the direction of the flow of the first wind flowing downward in the Z direction is smoothly changed from the bottom side in the Z direction to the front side in the X direction. The first curved plate 45 is arranged on the upper surface of the drain pan on the front side in the X direction.

After that, the second heat sink 65 of the Peltier module 60 with the mounting plate 55 is placed in the heat dissipating side chamber by using the through hole of the heat dissipating side case portion 25 so that the lower surface of the mounting portion 66 is positioned on the upper end surface of the second curved plate 50 . 27. Also, at this time, the first heat sink 61 is arranged so that the lower surface of the mounting portion 62 is positioned on the upper end surface of the first curved plate 45 .

In this state, as shown in FIG. 7, the mounting plate 55 is fixed to the front side plate 26 using screws (not shown) using the screw holes 18, and is mounted using screws (not shown) using the screw holes 19. It is fixed to the part 66 . As a result, the Peltier module 60 is fixed to the heat dissipation side case portion 25 via the mounting plate 55 . As shown in FIG. 3 , the second curved plate 50 has a surface portion 34 that contacts the mounting plate 55 when the Peltier module 60 is fixed to the heat dissipation side case portion 25 . In the fixed state, the second curved plate 50 contacts the locking groove 37 and the mounting plate 55 , so that the second curved plate 50 is positioned so as not to move relative to the heat dissipation side case portion 25 . In addition, as shown in FIG. 7, the first fan 31 is attached to the front side plate 26 .

Subsequently, as shown in FIG. 8, a heat insulating material 57 is placed between the first fan 31 and the first heat sink 61 so as to cover the first fan 31 except for the lower side in the Z direction and to cover both sides of the first heat sink 61 in the Y direction. Spread around. The heat insulating material 57 is made of, for example, urethane foam, polystyrene foam, glass wool, or the like, but may be made of any other heat insulating material. Subsequently, the cooling-side case portion 21, whose perspective view is shown in FIG. It is screwed into the screw hole of the cooling side case portion 21 and the screw hole of the heat dissipation side case portion 25 indicated by 17 in FIG. By tightening the bolts, the cooling-side case portion 21 is fixed to the heat-dissipating-side case portion 25, and the cooling device 10 is assembled.

FIG. 10 is an enlarged sectional view of the Z-direction lower side of the cooling device 10 when the sectional view of FIG. 3 is viewed from another angle. As shown in FIG. 10 , in the assembled state of the cooling device 10 , the first curved plate 45 has a locking projecting portion 38 extending upward in the Z direction from the end of the upper surface in the Z direction on the back side in the X direction. The X-direction surface of the locking protrusion 38 contacts the X-direction back surface of the mounting portion 62 . The contact between the locking protrusion 38 and the mounting portion 62 and the contact of the lower end of the first curved plate 45 in the Z direction with the upper surface of the drain pan 35 cause the first curved plate 45 to move relative to the case 20 . Positioned immovably.

As shown in FIG. 10 , in the assembled state of the cooling device 10 , the upper end of the surface 46 of the first curved plate 45 is located on the back side of the fins 63 of the first heat sink 61 in the X direction. Further, the surface 46, which is a concave surface, gradually moves to the front side in the X direction as it goes downward in the Z direction from its upper end. The lower end of the surface 46 is positioned on the back side in the X direction from the end of the drain pan 35 on the front side in the X direction. The upper end of the surface 46 faces substantially upward in the Z direction, and the lower end of the surface 46 faces substantially forward in the X direction.

In addition, in the assembled state of the cooling device 10, the upper end of the back surface 51 of the second curved plate 50 is located on the front side in the X direction with respect to the fins 63 of the second heat sink. The back surface 51, which is a concave surface, gradually moves to the back side in the X direction as it goes downward in the Z direction from its upper end. The lower end of the back surface 51 is located on the front side in the X direction with respect to the back end of the drain pan 35 in the X direction. The upper end of the back surface 51 faces substantially upward in the Z direction, and the lower end of the back surface 51 faces obliquely to the lower side in the Z direction.

FIG. 11 is a perspective view of the drain pan 35 viewed from above. Referring to FIG. 11 , the upper surface 54 of the drain pan 35 is the element side surface of the drain pan 35 on the Peltier element 80 side, and has the condensed water receiver 52 . The condensed water receiving portion 52 is a concave portion whose width in the Y direction gradually decreases toward the back side in the X direction (heat radiation side). provided to receive The height of the condensed water receiver 52 in the Z direction gradually decreases toward the back side in the X direction. As shown in FIG. 10 , the end of the condensed water receiver 52 on the front side in the X direction is positioned on the front side in the X direction relative to the lower end of the surface 46 on the front side in the X direction of the first curved plate 45 .

Again referring to FIG. 11 , the upper surface 54 of the drain pan 35 further has a water conduit 53 . The water conduit 53 is a groove extending in the X direction, communicates with the back end in the X direction of the condensed water receiver 52, and extends from the end back in the X direction. The upper surface 54 has a curved surface portion 98 and a flat portion 99 on the back side in the X direction. The curved surface portion 98 is composed of a smooth concave surface that moves to the back side in the X direction as it goes downward in the Z direction.

The curved surface portion 98 is located on the back side of the locking groove 37 in the X direction. The curved surface portion 98 forms a concave surface together with the back surface 51 of the second curved plate 50 locked in the locking groove 37 . The upper end of the curved surface portion 98 is oriented in a direction connected to the lower end of the back surface 51, and the lower end of the curved surface portion 98 is oriented toward the back side in the X direction.

The flat portion 99 is located on the back side end portion of the upper surface 54 in the X direction and is connected to the lower end portion of the curved surface portion 98 . Also, the plane portion 99 extends in a direction substantially parallel to the XY plane. The condensed water evaporating portion 36 is formed of a groove extending in the Y direction and provided on the flat portion 99 . The lower side of the water conduit 53 communicates with the central portion of the condensed water evaporator 36 in the Y direction. The height in the X direction of the groove bottom of the water conduit 53 formed by the grooves extending in the X direction gradually decreases toward the back side in the X direction. Therefore, the height of the condensed water receiving portion 52 in the Z direction gradually decreases toward the back side in the X direction. It flows to the back side in the directions indicated by arrows G and H and reaches the condensed water evaporator 36 . The condensed water that has reached the condensed water evaporator 36 spreads in the Y direction from the central portion of the condensed water evaporator 36 toward both ends in the Y direction in the directions indicated by arrows I and J.

In the above configuration, when the cooling device 10 performs cooling, DC power is supplied to the Peltier device 80 and the first and second fans 31 and 32 are driven. Then, regarding the Peltier element 80 formed by bonding two different types of plate-shaped metal plates, heat is transferred from one metal plate to the other metal plate due to the Peltier effect, and one metal plate is cooled. Meanwhile, the other metal plate is heated. Then, the first heat sink 61 in contact with one metal plate of the Peltier element 80 is cooled, and the second heat sink 65 in contact with the other metal plate of the Peltier element 80 via the spacer 89 is heated.

As a result, by driving the first fan 31 (see FIG. 3), the air taken from the refrigerator compartment of the delivery box 1 into the cooling side compartment 22 in the direction of arrow B is cooled when passing through the first heat sink 61 . Then, the cooled air moves downward in the Z direction and forward in the X direction along the concave surface 46 in the direction indicated by the arrow C, and is blown out from the inner outlet 24 toward the refrigerating compartment side of the delivery box 1. be. As a result, the refrigerator compartment of the delivery box 1 is cooled.

On the other hand, the air drawn into the heat dissipation side chamber 27 in the direction of arrow D from the outside by driving the second fan 32 takes heat from the second heat sink 65 when passing through the second heat sink 65 and is heated. Then, the heated air moves downward in the Z direction and backward in the X direction along the back surface 51 that is concave in the direction of arrow E, and is exhausted to the outside through the outer exhaust port 29 . By discharging hot air to the outside, the second heat sink 65 efficiently dissipates heat, enabling continuous heat transfer to the second heat sink 65 and suppressing a decrease in cooling efficiency. there is

Also, the condensed water generated by the first heat sink 61 moves downward in the Z direction and front side in the X direction along the surface 46 in the direction indicated by the arrow F (see FIG. 10), and drips onto the condensed water receiver 52. do. Also, the condensed water dripped into the condensed water receiving portion 52 flows in the direction indicated by the arrows G and H in the X direction back of the condensed water receiving portion 52 and the water conduit 53 and reaches the condensed water evaporating portion 36 . Then, the condensed water that has reached the condensed water evaporator 36 spreads in the Y direction from the central portion of the condensed water evaporator 36 toward the ends in the Y direction in the directions indicated by arrows I and J. As described above, the curved surface portion 98 and the back surface 51 of the drain pan 35 together form a concave surface, and the lower end of this concave surface is connected to the front side in the X direction of the flat portion 99 on which the condensed water evaporating portion 36 is formed. . Therefore, the hot air from the second heat sink 65 can be efficiently collided with the condensed water evaporating section 36 by guiding the hot air from the second heat sink 65 through the concave surface. It is designed to vaporize.

As described above, the cooling device 10 includes the first heat sink 61 and the second heat sink 65 that are arranged to face each other, the first fan 31 that blows air to the first heat sink 61, and the second fan that blows air to the second heat sink 65. 32. The cooling device 10 also includes a resin case 71 that is fixed to the first heat sink 61 and the second heat sink 65 while being arranged therebetween. Further, the case 71 has a first annular groove 59 provided on a facing surface (first facing surface) 58 facing the first heat sink 61 and a mounting surface (second facing surface) 79 facing the second heat sink 65 . and a through hole 72 having openings in the facing surface 58 and the mounting surface 79 . The cooling device 10 also includes a Peltier element 80 housed in the through-hole 72 , a cooling-side O-ring 83 (first airtight material) attached to the first annular groove 59 , and an O-ring attached to the second annular groove 74 . A heat radiating side O-ring (second airtight material) 84 is provided.

Therefore, the Peltier element 80 can be covered with the case 71 made of resin, and further, the O-rings 83, 84 on the cooling and heat dissipation side suppress the formation of gaps between the first and second heat sinks 61, 65 and the case 71. can. Therefore, the airtightness of the inside of the case 71 against the outside can be enhanced, so that the heat of the outside air can be suppressed from being conducted to the metal plate on the cooling side of the Peltier element 80, and as a result, the cooling efficiency of the cooling device 10 can be enhanced.

Further, the case 71 may have wire through-holes 77 and 78 through which the wires 81 and 82 for energizing the Peltier element 80 are passed. The cooling device 10 also includes bushings 85 and 86 that are arranged so that there is no gap between the inner peripheral surfaces of the wire through holes 77 and 78 and the conducting wires 81 and 82, and is arranged to cover the bushings 85 and 86. A resin cover 87 may be provided.

According to the above configuration, the cover 87 and the bushings 85 and 86 can further enhance the airtightness of the inside of the case 71 from the outside, and can further suppress the conduction of heat from the outside air into the case 71 . Therefore, the cooling efficiency of the cooling device 10 can be further increased.

The cooling device 10 may also include a metal spacer 89 sandwiched between the Peltier element 80 and the first heat sink 61 . The spacer 89 may be made of any metal, but is preferably made of a metal with high thermal conductivity, such as aluminum, silver, copper, nickel, or the like.

According to the above configuration, the distance between the first heat sink 61 and the second heat sink 65 can be freely adjusted by the spacer 89 made of metal. Therefore, a Peltier module 60 having a desired length can be easily manufactured.

Further, the heat insulating material 57 may be spread around the first fan 31 and the first heat sink 61 so as to cover the first fan 31 except for the lower side in the Z direction and both sides of the first heat sink 61 in the Y direction. .

According to the above configuration, the arrangement of the heat insulating material 57 can suppress the conduction of heat from the outside air to the first heat sink 61 . Therefore, also for this reason, the cooling efficiency of the cooling device 10 can be increased.

The delivery box 1 also includes a cooling device 10 . Therefore, the refrigerator compartment of the delivery box 1 can be effectively cooled.

It should be noted that the present disclosure is not limited to the above embodiments and modifications thereof, and various improvements and modifications are possible within the scope of the claims of the present application and their equivalents.

For example, in the above-described embodiment, the cooling device 10 includes bushings 85 and 86 arranged so that there is no gap between the inner peripheral surfaces of the conductor wire through holes 77 and 78 of the resin case 71 and the conductor wires 81 and 82 . has been described. Moreover, the case where the cooling device 10 includes the resin cover 87 arranged so as to cover the bushings 85 and 86 has been described. However, the cooling device does not have to have a resin cover arranged to cover the bushing. Alternatively, the cooling device may not include a bushing arranged between the inner peripheral surface of the conductor wire through hole and the conductor wire.

Also, the case where the cooling device 10 includes the metal spacer 89 sandwiched between the Peltier element 80 and the first heat sink 61 has been described. However, the cooling device may have a metal spacer sandwiched between the Peltier element and the second heat sink instead of the metal spacer sandwiched between the Peltier element and the first heat sink. Alternatively, the cooling device may not have metal spacers in contact with the Peltier elements.

Also, the case where the heat insulating material 57 is spread around the first fan 31 and the first heat sink 61 so as to cover the first fan 31 except for the lower side in the Z direction and both sides of the first heat sink 61 in the Y direction has been described. . However, the heat insulating material does not have to be arranged so as to cover areas other than the Z-direction lower side of the first fan. Also, the heat insulating material does not have to be arranged so as to cover both sides of the first heat sink in the Y direction.

Also, the case where the condensed water generated by the first heat sink 61 is vaporized by the condensed water evaporator 36 using the hot air from the second heat sink 65 has been described. However, the condensed water generated in the first heat sink may not be evaporated, and may be discharged to the outside of the cooling device using, for example, a drain pipe.

Also, the case where the cooling device 10 of the present disclosure is mounted in the home delivery box 1 has been described. However, the cooling device of the present disclosure may be installed in any device other than the home delivery box. For example, the cooling device of the present disclosure may be used for cooling the CPU of a computer. Alternatively, the cooling device of the present disclosure may be mounted in a small cold/heater that is placed in a car or the like, may be mounted in a medical cooling device, or may be mounted in any other device that requires cooling.

1 delivery box 10 cooling device 31 first fan 32 second fan 58 facing surface (first facing surface) 59 first annular groove (first groove) 61 first heat sink 65 second heat sink 71 case, 72 through hole, 74 second annular groove (second groove), 77,78 through hole for conducting wire, 79 mounting surface (second opposing surface), 80 Peltier element, 81,82 conducting wire, 83 cooling side O-ring ( first airtight member), 84 heat radiation side O-ring (second airtight member), 85, 86 bushing, 87 cover, 89 spacer.

Claims (4)

a first heat sink and a second heat sink arranged to face each other;
a first fan that blows air to the first heat sink;
a second fan that blows air to the second heat sink;
A first groove fixed to the first heat sink and the second heat sink in a state of being arranged therebetween and provided in a first opposing surface facing the first heat sink, and a second groove facing the second heat sink. a resin case having a second groove provided on the opposing surface and a through hole having openings in the first opposing surface and the second opposing surface;
a Peltier element housed in the through hole;
a first airtight member attached to the first groove;
a second airtight member attached to the second groove;
equipped with,
The case has a wire through-hole for passing a wire for energizing the Peltier element,
a bushing arranged so that there is no gap between the inner peripheral surface of the conductor wire through hole and the conductor wire;
a resin cover arranged to cover the bushing;
with
The cover is a member different from the case. Ru,coldcooling device. 2. The cooling device according to claim 1 , wherein said cover is screwed to said case so as to cover said bushing . 3. The cooling device according to claim 1, further comprising a metal spacer sandwiched between said Peltier element and said first heat sink or sandwiched between said Peltier element and said second heat sink. A delivery box comprising the cooling device according to any one of claims 1 to 3.

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