JP2017169774A - Show case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a show case capable of improving maintenance property in a machine room.SOLUTION: A show case comprises: a housing in which an exhibition room for an article is formed; a machine room provided on a lower side of the housing, and on which an opening facing the exhibition room is formed; a duct unit which is formed by integrating a deck pan, and a first duct part having an air suction port and provided on a lower side of the deck pan, which is mounted on the machine room so as to close the opening, in which the deck pan serving as a bottom surface of the exhibition room; a second duct part provided along a back face side of the exhibition room, fluid communicates with the first duct part, and has an outlet capable of blowing cold air to the exhibition room; and a cooling part for cooling air which passes the second duct part.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a showcase including a machine room below an article display room.

  Conventionally, as this type of showcase, there is one described in Patent Document 1. In this showcase, the interior space of the heat insulating housing that opens toward the front is partitioned by a duct plate into an article display chamber and an air flow path. The upstream end of this flow path is an air suction port that opens toward the outside on the front side of the heat insulating housing. A fan and an evaporator are provided in the middle of the flow path. Moreover, the most downstream of this flow path is an outlet for cold air generated by heat exchange in the evaporator. An air curtain is formed along the opening by the blown-out cool air, and the articles displayed in the display chamber are cooled.

  A machine room is provided below the heat insulating housing. The machine room accommodates at least a compressor and a condenser. The compressor compresses and discharges the refrigerant supplied from the above-described evaporator through the refrigerant pipe. The condenser exchanges heat between the ambient air and the refrigerant discharged from the compressor to liquefy the refrigerant from the compressor. The expander expands the refrigerant discharged from the condenser. The evaporator cools the ambient air by evaporating the refrigerant discharged from the expander. As a result, cold air is generated as described above.

JP 2014-25669 A

  By the way, in the showcase, the refrigerant pipe connecting the condenser and the compressor is wound in a stretchable shape (for example, a coil shape), and the condenser and the like can be pulled out from the machine room for maintenance. .

  An object of the present disclosure is to provide a showcase with improved maintainability in a machine room.

  The present disclosure includes a housing in which a display chamber for articles is formed, a machine chamber provided below the housing and having an opening facing the display chamber, a deck pan, an air inlet, and the deck pan. A duct unit integrated with a first duct portion provided below the duct unit, the duct unit being placed on the machine room so as to close the opening, wherein the deck pan forms a bottom surface of the display room And a second duct portion provided along the back side of the display chamber, the second duct portion being in fluid communication with the first duct portion and having a blowout port capable of blowing out cool air toward the display chamber. The present invention is directed to a showcase including a duct portion and a cooling portion that cools air passing through the second duct portion.

  According to the present disclosure, it is possible to provide a showcase with improved maintainability in a machine room.

FIG. 4 is a front view of a showcase according to an embodiment of the present disclosure. It is a figure when the cross section in alignment with line II-II 'of the showcase of FIG. 1 is seen from the right side. It is a block diagram which shows the structure of the cooling part with which the showcase of FIG. 1 is equipped. It is sectional drawing which shows a machine room when the duct unit of FIG. 2 is removed. It is a front view of the showcase which concerns on a modification. It is a figure when the cross section which follows the line VI-VI 'of the showcase of FIG. 5 is seen from the right direction.

<1. Embodiment>
Hereinafter, the showcase 1 according to an embodiment of the present disclosure will be described in detail with reference to FIGS. 1 to 4.

<1-1. Definition>
In each figure, the x-axis indicates the direction from the left side to the right side (ie, the left-right direction) when the front of the showcase 1 faces a person. The y-axis indicates the direction from the front side of the showcase 1 to the back side (that is, the front-rear direction). Further, the z-axis indicates a direction (that is, a vertical direction) from the installation surface of the showcase 1 toward the vertically upward direction. The x-axis and y-axis indicate the horizontal direction, and the z-axis indicates the vertically upward direction.

<1-2. Basic configuration of showcase 1>
1-4, the showcase 1 is installed in a store such as a convenience store, for example, and displays articles such as food and beverages and stores them at a predetermined temperature (for example, 5 ° C. to 10 ° C.). Such a showcase 1 includes a heat insulating housing 2, a cooling unit 3, a machine room 4, a duct unit 5 in which a deck pan 51 and a first duct unit 52 are integrated, and a second duct unit 6. I have.

  The heat insulation housing 2 generally includes an exterior body 21, an interior body 22, a heat insulation panel 23, and at least one shelf 24. In FIG. 1, a part of the interior body 22 and the heat insulating panel 23 are indicated by hidden lines (broken lines).

  The exterior body 21 and the interior body 22 are mainly made of steel plates and open on the front side. The exterior body 21 defines the outer shape of the heat insulating housing 2. The interior body 22 is provided inside the exterior body 21 and defines a display room A for displaying articles. The display room A is open toward the front.

  A heat insulating panel 23 is interposed between the exterior body 21 and the interior body 22. More specifically, the heat insulation panel 23 is provided behind and above the display chamber A in the present disclosure.

  The shelf 24 is placed horizontally in the display room A. Note that, as the at least one shelf 24, the present disclosure exemplifies five shelves 24 that are installed at intervals in the vertical direction.

  The showcase 1 includes a cooling unit 3. As clearly shown in FIG. 3, the cooling unit 3 generally includes a compressor 31, a condenser 32, an expander 33 made of a capillary tube and the like, and an evaporator 34 in this order. The refrigerant pipe 35 filled with the refrigerant is connected so as to be in fluid communication. The cooling unit 3 further includes a condenser side fan 36, a condenser side motor 37, an evaporator side fan 38, and an evaporator side motor 39.

  The compressor 31 compresses and discharges the refrigerant supplied from the evaporator 34 through the refrigerant pipe 35. The compressor 31 may be a so-called two-stage compressor. The two-stage compressor discharges the refrigerant discharged from the evaporator 34 to a required pressure on the high-pressure side after compressing the refrigerant discharged to the intermediate pressure on the low-pressure side.

  The refrigerant discharged from the compressor 31 flows into the condenser 32. Further, an air flow passes along the surface of the condenser 32. This air flow is generated by the rotation of the condenser side fan 36 by the driving force from the condenser side motor 37. The condenser 32 exchanges heat between the air flow passing through the periphery and the refrigerant that has flowed in, and liquefies the refrigerant from the compressor 31.

The expander 33 expands the refrigerant discharged from the condenser 32.
The refrigerant discharged from the expander 33 flows into the evaporator 34. Further, an air flow passes along the surface of the evaporator 34. This air flow is generated by the rotation of the evaporator side fan 38 by the driving force from the evaporator side motor 39. The evaporator 34 evaporates the refrigerant discharged from the expander 33 and cools the air that passes around the evaporator 34. As described above, the cooling unit 3 generates cold air around the evaporator 34 in the second duct unit 6 (described later) using the phase change of the refrigerant circulating in the refrigerant pipe 35.

  Of the cooling unit 3, the compressor 31, the condenser 32, the condenser side fan 36, and the condenser side motor 37 are accommodated in the machine room 4. Moreover, the expander 33, the evaporator 34, the evaporator side fan 38, and the evaporator side motor 39 are the 2nd duct part 6 formed in the heat insulation housing | casing 2, as shown in FIGS. Is provided. Here, the second duct portion 6 is preferably provided with a plurality of evaporator side motors 39. The plurality of evaporator-side fans 38 are preferably arranged on the evaporator 34 along the left-right direction, for example. This is to apply a lot of air to the evaporator 34. In addition, since the fan for circulating cold air is eliminated from the first duct portion 5, power for circulating and guiding the cold air is required. Furthermore, since each of the evaporator side fans 38 is installed in a narrow space in the second duct portion 6, it is preferable that the evaporator side fans 38 are constituted by, for example, a small axial flow fan. In order to prevent an increase in the size of the evaporator side fan 38, the output of each evaporator side fan 38 is typically set to 0.5 W to 2 W, and at most about several W. Is desirable.

<1-3. Characteristic configuration of showcase 1>
The machine room 4 is provided directly below the heat insulating housing 2 as clearly shown in FIGS. 1, 2, and 4. The machine room 4 accommodates the above-mentioned elements provided in the cooling unit 3 and a control circuit board (not shown). On the control circuit board, a microcomputer for controlling the operation of the cooling unit 3 in order to adjust the temperature of the display chamber A (hereinafter referred to as the internal temperature) to the temperature set by the user (hereinafter referred to as the set temperature). Etc. are implemented.

  In the present disclosure, a temperature sensor (not shown) for measuring the current internal temperature is provided in the display chamber A or the second duct portion 6, and the microcomputer or the like displays the detection result of the temperature sensor on the display 41. To do. As clearly shown in FIG. 1, the display 41 is provided on the front panel of the machine room 4 so that the user can visually recognize the current internal temperature.

  An air inlet 42 is formed in the front panel of the machine room 4 for heat exchange in the condenser 32. The condenser 32 faces the air suction port 42 on the back side of the air suction port 42. In other words, the formation region B of the air inlet 42 in the front panel substantially overlaps the outline of the condenser 32 in a plan view from the front direction.

  As can be understood from FIGS. 2 and 4, an opening C is formed at the upper end of the machine room 4 (more specifically, the part excluding a part behind the upper end) so as to face the display room A. More specifically, the opening C has a substantially rectangular shape in plan view from above, and has a size that allows a service person or the like to access the machine room 4 during maintenance. Further, a locking portion (not shown) is provided at the edge of the opening C so that the duct unit 5 described later is hooked and stopped, so that the duct unit 5 does not fall into the machine room 4. . Further, a seal member (not shown) is provided on the upper surface of the locking portion so as to thermally separate (isolate) the display chamber A and the inside of the machine chamber 4.

  The duct unit 5 is placed in the opening C as shown in FIG. The duct unit 5 can be removed from the opening C as shown in FIG. 1, 2, and 4, such a duct unit 5 includes a deck pan 51 that forms a top plate, a heat insulating panel 53 that forms a substrate (mainly a bottom plate), a left side plate 54, a right side plate 55, including.

The deck pan 51 becomes the bottom surface of the display chamber A when the deck unit 5 is placed in the opening C. Such a deck pan 51 has a substantially flat plate portion having a predetermined thickness in the z-axis direction, and articles can be displayed on the upper surface of the flat plate portion. Moreover, it is substantially parallel to the lower surface of this flat plate part, and a horizontal surface (installation surface of the showcase 1).
The heat insulation panel 53 has a flat plate portion having an upper surface and a lower surface that face each other in the vertical direction and are substantially parallel to the horizontal plane. Moreover, the heat insulation panel 53 protrudes and extends upward from the front end of the flat plate portion.

The duct unit 5 uses the heat insulation panel 53 as a substrate. The deck pan 51 is arranged at a predetermined interval upward with respect to the upper surface of the heat insulating panel 53. The left ends of the deck pan 51 and the heat insulating panel 53 are connected and closed by a left side plate 54, and their right ends are connected and closed by a right side plate 55. In addition, those rear ends are not connected to each other, thereby forming a communication port D as shown in FIGS.
Here, the front end of the deck pan 51 is offset on the back side with respect to the front end of the heat insulating panel 53, thereby forming an air suction port E at the upper front end of the duct unit 5 as shown in FIGS. 2 and 4. Is done.

  The space surrounded by the deck pan 51, the heat insulating panel 53, and the left and right side plates 54, 55 defines the first duct portion 52. An air suction port E is provided at the front end of the first duct portion 52, and a communication port D is provided at the rear end thereof.

  Reference is now made to FIG. As described above, the interior body 22 defines the shape of the display room A. In the present disclosure, the heat insulating panel 23 is generally provided at a distance on the back side with reference to a portion defining the back surface of the display chamber A in the interior body 22 and a portion defining the top surface of the display chamber A. As a reference, it is provided at an interval on the upper side.

  The second duct portion 6 is defined by a space surrounded by the interior body 22 and the heat insulation panel 23. The lower end of the second duct portion 6 is defined by a heat insulating panel 23 in which a drain outlet F is formed. A communication port G that opens toward the front is formed in the lower end portion, and this communication port G is connected to the communication port D of the first duct portion 52 when the duct unit 5 is placed in the opening C. Fluid communication.

  The second duct portion 6 extends upward along the back surface of the display chamber A from the communication port G, and then bends forward along the upper surface of the display chamber A. A cold air outlet H that opens downward is formed at the end portion of the second duct portion 6 described above.

<1-4. Operation during normal use of the showcase>
As described above, according to the present showcase 1, during normal use, the duct unit 5 closes the opening C at the upper end of the machine room 4, whereby the first duct portion 52 and the second duct portion 6 communicate with each other. An air flow path from the air suction port E to the cold air outlet H via the communication ports D and G is formed.

  In this state, when the cooling unit 3 operates under the control of the microcomputer, the evaporator-side fan 38 rotates and air is taken in from the air suction port E and travels toward the evaporator 34. Heat exchange is performed between the refrigerant flowing into the evaporator 34 and the air flowing along the surface of the evaporator 34, and cold air is generated around the evaporator 34. The cold air is finally ejected from the cold air outlet H, thereby forming an air curtain by the cold air along the opening of the display chamber A, and further, the articles displayed on the shelf 24 are cooled.

  Further, as described above, the cool air is blown out from the cold air outlet H by the rotation of the evaporator-side fan 38, and an air curtain is formed along the opening of the display chamber A. Here, since the air inlet E faces the cold air outlet H in the vertical direction, most of the cold air blown out from the cold air outlet H flows into the air inlet E and enters the first duct portion 52. Return. As described above, the evaporator-side fan 38 guides the cold air generated by the evaporator 34 by circulating it through the flow path formed by the second duct part 6, the opening of the display chamber A and the first duct part 52. It also has a function.

<1-5. Main functions and effects of showcase 1>
According to the showcase 1, there is no fan that circulates and guides cold air to form an air curtain in the opening portion of the display chamber A inside the first duct portion 52. An evaporator-side fan 38 is installed. In other words, the first duct portion 52 in the duct unit 5 is not provided with a part that obstructs the removal of the duct unit 5 and merely serves as an air flow path. Therefore, the removal of the duct unit 5 is not hindered by the wiring of the parts. Then, if the duct unit 5 placed in the opening C is removed, the machine room 4 can be accessed, so that maintenance is improved. For example, when the duct unit 5 is fixed with screws or the like, the duct unit 5 can be easily removed using a screwdriver or the like. As a simpler method, the duct unit 5 is simply placed in the opening C. In other words, the duct unit 5 is not fixed to the opening C by a fixing member such as a screw. Thereby, since the service person etc. can remove the duct unit 5 easily, the accessibility to the inside of the machine room 4 improves. Further, the user can easily close the opening C by the duct unit 5. As a result, the maintainability of the showcase 1 can be improved.

  In Patent Document 1 described above, the machine room itself is a drawer to access the machine room. Therefore, the refrigerant pipe connecting the condenser and the compressor is wound into a shape that can be expanded and contracted. On the other hand, in this showcase 1, since the access to the inside of the machine room 4 is from the opening C, it is not necessary to make the refrigerant pipe 35 extendable / contractable. As a result, the limited space of the machine room 4 can be used effectively, and the refrigerant pipe 35 can be laid at low cost.

<1-6. Action and effect of showcase 1 (others)>
As described above, in the duct unit 5, the upper surface and the lower surface of the first duct portion 52 are parallel to the horizontal direction. Further, there is no fan that circulates and guides cold air to form an air curtain in the opening portion of the display chamber A inside the first duct portion 52, and the height inside the first duct portion 52 is such a fan. Not subject to restrictions. The second duct portion 6 is provided with an evaporator 34 and an evaporator-side fan 38. By these, the design freedom degree of the height of the 1st duct part 52 spreads, and the position of the deck pan 51 in an up-down direction can be made low. Thereby, since the space of the display room A can be expanded without increasing the height of the showcase 1, the limited space of the display room A can be used effectively.

  Further, as described above, the drain outlet F is formed at the bottom of the second duct portion 6. The drainage port F guides water (frost melting water, condensed water, etc.) generated on the surface of the evaporator 34 into the machine room 4. Thus, since the drainage port F is formed in the 2nd duct part 6, the upper surface and lower surface of the 1st duct part 52 can be made parallel to a horizontal direction.

  The machine room 4 is provided with an evaporating dish (not shown) for evaporating water introduced from the drainage port F. Further, since the duct unit 5 is detachable from the machine room 4, there is a possibility that water generated on the surface of the evaporator 34 may leak from the boundary between the first duct portion 52 and the second duct portion 6. In view of this, it is preferable that the first duct portion 52 is provided with a flange 56 that hangs on the lower edge of the communication port G on the second duct portion 6 side at the lower edge of the communication port D.

<1-7. Modification>
In the above embodiment, the display 41 is provided on the front panel of the machine room 4. Therefore, the lateral width of the air inlet 42 is limited by the display 41. However, as shown in FIGS. 5 and 6, if the display 41 is arranged above the showcase 1, the lateral width of the air inlet 42 is made substantially the same as the lateral width of the machine room 4. I can do it. If the horizontal width of the air inlet 42 can be increased as described above and the condenser 32 having the same capacity as that of the above embodiment is used, the height of the condenser 32 can be reduced. Thereby, since the position of the deck pan 51 can be further lowered, the vertical height of the air inlet 42 can be reduced. Thereby, the limited space of the display room A can be used more effectively.
<1-8. Addendum>
Note that the upper surface and the lower surface of the first duct portion 52 are not necessarily parallel to the horizontal direction. For example, the lower surface of the first duct portion 52 may be slightly inclined in the direction in which the lower surface of the second duct portion 6 is lowered toward the drain outlet F side. This makes it easier to guide water to the drain outlet F.

  The showcase of the present disclosure can improve the maintainability in the machine room and is suitable for a gondola type showcase or the like.

DESCRIPTION OF SYMBOLS 1 Showcase 2 Thermal insulation case 4 Machine room 5 Duct unit 51 Deck pan 52 1st duct part 6 2nd duct part 3 Cooling part 32 Condenser 34 Evaporator 38 Evaporator side fan A Display room C Opening E Air suction port F Drainage Mouth H Cold air outlet

Claims (5)

A housing in which an article display room is formed;
A machine room provided below the housing and having an opening facing the display room;
A duct unit in which a deck pan and an air suction port and a first duct portion provided below the deck pan are integrated, is placed on the machine room so as to close the opening, and A duct unit in which a deck pan forms the bottom of the display room;
A second duct portion provided along the back side of the display chamber, the second duct portion having fluid outlets that are in fluid communication with the first duct portion and capable of blowing cold air toward the display chamber. When,
And a cooling unit that cools air passing through the second duct unit.   2. The showcase according to claim 1, wherein the first duct portion has an upper surface and a lower surface forming an air flow path, and the upper surface and the lower surface are each parallel to a horizontal direction.   The showcase according to claim 1, wherein the cooling unit includes an evaporator and a fan provided in the second duct unit.   The showcase according to any one of claims 1 to 3, wherein the second duct portion is formed with a drain outlet that guides water generated on a surface of the evaporator to a machine room. The cooling unit includes a condenser housed in the machine room,
The showcase according to claim 1, wherein the machine room and the condenser have substantially the same size in the lateral direction.

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