Refrigerated showcase

Abstract

To provide a refrigerated showcase which can prevent an adverse effect on a compressor and a related apparatus caused by the heat of the compressor.SOLUTION: A refrigerated showcase 10 comprises an intake port for making atmospheric air flow into a machine room 16, and an exhaust port 52 formed at a right side panel 32 which forms the machine room 16, and making air in the machine room 16 flow out to the outside by a rotational operation of a fan F. A compressor CM is arranged at an opposite side to the intake port 51 with the fan F sandwiched between the intake port and the opposite side. A capacitor 70 is arranged between a send-out side of the fan F and the exhaust port 52 out of a surrounding space 55 of the compressor CM which is formed in the machine room 16 as obstruction means for obstructing a flow of air progressing toward a direction in which the exhaust port 52 is located from the send-out side of the fan F, and guiding it to a second region 57.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a refrigerated showcase having a storage compartment for cooling and storing items, and a machine compartment for accommodating a compressor, a condenser, and a fan. [Background technology]

[0002] Refrigerated showcases are widely used, which display items such as food and beverages in a storage compartment while cooling them so that they can be seen from the outside. Refrigerated showcases include a machine room that is partitioned off from the storage compartment, and this machine room houses a cooling mechanism (compressor, condenser, expansion valve, etc.) for cooling the storage compartment, a fan, etc. The machine room is connected to the outside through an intake port and an exhaust port, and is configured such that a fan in the machine room (near the intake port) operates to draw in outside air from the intake port into the machine room and to exhaust air from within the machine room through the exhaust port. In this way, refrigerated showcases are configured to replace the air in the machine room by operating the fan, which promotes heat dissipation from the condenser and compressor arranged in the machine room and prevents an excessive temperature rise in the machine room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-298382 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, a refrigerated showcase called a neta case, which displays fresh ingredients such as sushi toppings while storing them in a refrigerator, is generally long from side to side and is installed at the counter of a sushi restaurant. Customers sit in front of the counter where the neta case is placed, and behind it, a store clerk takes ingredients in and out, so the neta case is configured so that a machine room is provided at one of the left and right side ends, and air is drawn into the machine room from the rear of the neta case and exhausted to the side of the neta case. At the side end of the neta case where the machine room is formed, an exhaust port is provided in the side panel that forms one side of the neta case, and the exhaust port is close to the intake port of the rear panel. In other words, since the intake port and the exhaust port are not in a positional relationship that sandwiches the compressor, part of the air taken into the machine room from the intake port is exhausted to the outside by taking a shortcut around the compressor and close to the exhaust port. The air that is exhausted by taking a shortcut inside the machine room in this way is exhausted without sufficient heat exchange with the compressor inside the machine room, so there is a risk that the temperature inside the machine room will become high and adversely affect the compressor and related equipment.

[0005] Therefore, in consideration of the above-mentioned problems inherent in conventional refrigerated showcases, the present invention has been proposed to optimally solve these problems, and its object is to provide a refrigerated showcase that can prevent the adverse effects of compressor heat on the compressor and related equipment. [Means for solving the problem]

[0006] In order to overcome the above problems and achieve the intended purpose, First Measure teeth, A refrigerated showcase comprising: a machine room provided on one side of the inside of a box body constituting an outer shell and housing a compressor and a fan; an air intake formed in a back panel forming the machine room and allowing outside air to flow into the machine room by operation of the fan; and an air exhaust formed in a side panel forming the machine room and allowing air within the machine room to flow out to the outside by operation of the fan, the compressor being disposed on the opposite side of the air intake across the fan, The gist of the invention is that an obstruction means is provided between the outlet side of the fan and the exhaust port in the enclosed space of the compressor formed in the machine room so as to communicate with the exhaust port, for obstructing the flow of air from the outlet side of the fan in the direction in which the exhaust port is located, and for guiding the air to a path on the side of the enclosed space away from the exhaust port. This configuration According to the invention, the amount of air flowing through the path in the space enclosed by the compressor on the side away from the exhaust port in the machine room is increased, and air stagnation in the machine room is prevented. Therefore, the compressor dissipates heat sufficiently, the machine room is efficiently ventilated, and an excessive rise in temperature of the compressor and related equipment in the machine room is prevented. In other words, adverse effects due to the heat generated by the compressor (such as adverse effects of reducing the durability and shortening the lifespan of the compressor and related equipment) can be prevented.

[0007] Second Measure teeth, The inhibiting means is a capacitor electrically connected to a drive source of the compressor. This configuration According to the present invention, by using a capacitor as the impeding means, it is possible to suppress disadvantages such as an increase in the number of parts in the machine room, complexity in the machine room, and increased costs.

[0008] Third Option teeth, The gist of the invention is that an expansion valve connected via a refrigerant piping to an evaporator that cools a storage chamber in which goods are cooled and stored is arranged in the machine chamber so as to be located above the opposing area of ​​the fan and the compressor. This configuration According to the invention, the upward movement of air from the opposing region due to contact with the compressor or the obstruction means is obstructed by the expansion valve, and the air is guided to a path in the enclosed space away from the exhaust port. This increases the amount of air flowing in the path in the enclosed space away from the exhaust port, preventing air stagnation in the machine room and preventing adverse effects of heat generated by the compressor (such as adverse effects that reduce the durability of the compressor and related equipment and shorten their lifespan). Effect of the Invention

[0009] According to the refrigerated showcase of the present invention, adverse effects of the heat of the compressor on the compressor and related equipment can be suppressed. [Brief description of the drawings]

[0010] [Figure 1] Fig. 2 is a perspective view of the refrigerated showcase according to the embodiment as viewed from the upper right front side, in which a machine room formed inside the box body is indicated by a dashed line. [Diagram 2] 1 is a perspective view of a machine unit housed in the right end of a refrigerated showcase, as viewed from the upper left front side. The outline of a machine room is indicated by a dashed line. [Diagram 3] It is a plan view showing a machine unit, with the front, rear, left and right walls of the machine room (rear panel, front panel, right side panel, partition plate) shown crossing the machine unit near the bottom end. [Figure 4] FIG. 2 is a right side view of the mechanical unit. [Diagram 5] FIG. 2 is a plan view of the shroud, with the condenser, fan, etc. shown in dashed lines. [Figure 6] This is an explanatory diagram of the air flow in the machine room when the fan is operating, and the relative positions of the intake port, exhaust port, condenser, fan, compressor, capacitor, expansion valve, etc. are simply shown using dashed lines based on the position of the shroud (first plate portion) in a plan view of the machine room, and the air flow from the intake port to the exhaust port is shown by an arrow (dashed two-dot line). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Next, the refrigerated showcase according to the present invention will be described below with reference to the attached drawings by way of preferred embodiments. In the description of the specification, "left" and "right" refer to the left and right sides of the refrigerated showcase 10 as viewed from the front side (front side). In the embodiment, a refrigerated showcase 10 in the form of a "neta case" will be described, but the present invention can also be applied to other forms of refrigerated showcases. EXAMPLES

[0012] (General configuration of the refrigerated showcase 10) As shown in FIG. 1, the refrigerated showcase (sushi case) 10 of the embodiment has an outer shell formed by a box body 12 long in the left-right direction. Inside the box body 12, a storage chamber 14 for cooling and storing food (items) so that they can be seen from the outside (front), and a machine room 16 for accommodating components of a cooling mechanism 18 for cooling the storage chamber 14 (compressor CM, condenser CD, expansion valve EV, and refrigerant piping P), a fan F, etc. are formed. The storage chamber 14 and the machine room 16 are formed side by side on the left and right, and about three-quarters (or four-fifths) of the left side of the box body 12 is the storage chamber 14, and the remaining one-quarter (or one-fifth) of the right side is the machine room 16. The box body 12 is supported by a dish-shaped box body base 34 long in the left-right direction, and the outer surface is formed by a plurality of panels 24, 26, 28, 30, 32 that are assembled along a frame (not shown) that forms the skeleton on the upper surface side of the box body base 34. In addition, a transparent windshield 20 is provided on the front side of the box body 12 so that the storage compartment 14 can be viewed from the front, and a sliding door 22 is provided on the rear side of the box body 12 so that it can be opened and closed freely on the left and right sides so that items such as fresh food ingredients can be put in and taken out of the storage compartment 14.

[0013] Here, the storage compartment 14 is formed by a front windshield 20, a sliding door 22, a box base 34 (area excluding the right end), a top panel 24 (area excluding the right end) that forms the upper surface of the box 12, a left side panel 30 that forms the left side surface of the box 12, and a partition plate 36 that separates the storage compartment 14 from the machine compartment 16.

[0014] The machine room 16 is formed by the right end of the top panel 24 and the box base 34, a partition plate 36, a front panel 26 forming the front surface of the box body 12, a rear panel (back plate) 28 forming the rear surface of the box body 12, and a right side panel (side plate) 32 forming the right surface of the box body 12. That is, the machine room 16 is formed by four plate surfaces (front, rear, left and right plate surfaces) including the rear surface of the front panel 26, the front surface of the rear panel 28, the right surface of the partition plate 36, and the left surface of the right side panel 32. The machine room 16 accommodates a compressor CM, a condenser CD, an expansion valve EV, a fan F, etc., which are integrally assembled (as a machine unit U). The machine unit U accommodated in the machine room 16 is shown in Figs. 2 to 4.

[0015] In the cooling mechanism 18, the compressor CM, the condenser CD, the expansion valve EV, and the evaporator EP are connected to each other through refrigerant piping P so that the refrigerant circulates in this order. That is, the vaporized refrigerant compressed by the compressor CM is condensed and liquefied in the condenser CD through the refrigerant piping P, then decompressed by the expansion valve EV, flows into the evaporator EP, expands and evaporates all at once, and exchanges heat with the air in the storage chamber 14 to cool the storage chamber 14. The vaporized refrigerant that has evaporated and exchanged heat in the evaporator EP returns to the compressor CM through the refrigerant piping P, repeating this cycle. The evaporator EP is disposed in the upper part of the storage chamber 14 so as to communicate with a specific refrigerant piping Pa (see Figs. 2 and 3) that extends from the expansion valve EV to the left (the partition plate 36 side) among the refrigerant piping P that constitutes the cooling mechanism 18. The outer surfaces of some of the refrigerant piping P, including this specific refrigerant piping Pa, are covered and insulated by a cylindrical insulating material 38. Further, as a means for cooling the condenser CD, a fan F (see FIG. 4) disposed in the machine unit U so as to face the condenser CD is used.

[0016] As shown in Fig. 3, the rear panel 28 covering the machine room 16 from the rear is formed with an intake port 51 that communicates the machine room 16 with the external space behind the box body 12. The right side panel 32 covering the machine room 16 from the right side is formed with an exhaust port 52 that communicates the machine room 16 with the external space on the right side of the box body 12. The compressor CM is mounted in the approximate center of the machine room 16, and an enclosed space 55 that communicates with the exhaust port 52 and surrounds the compressor CM is defined between the outer peripheral surface of the compressor CM and each plate surface (front, rear, left and right plate surfaces) that form the machine room 16 from the front, rear, left and right. In the machine room 16, the compressor CM is located in front of the intake port 51 formed in the rear panel 28 and to the left of the exhaust port 52 formed in the right side panel 32. Also, within the machine room 16, a condenser CD is arranged behind the compressor CM so as to face closely the front surface (inner surface) of the rear panel 28, and a fan F is arranged on the front side of this condenser CD with its central axis of rotation facing in the fore-and-aft direction (see Figures 4 and 5).

[0017] The condenser CD is disposed in the machine room 16 with its upper and front surfaces covered by a shroud 60 formed by bending a metal plate. As shown in FIG. 4 and FIG. 5, the shroud 60 includes a first plate portion 61 extending vertically and with its rear surface facing the front surface of the condenser CD, and a second plate portion 62 extending rearward from the upper edge of the first plate portion 61 and with its lower surface facing the upper surface of the condenser CD. A large circular vent 61a is formed penetrating the first plate portion 61 at the approximate center of the first plate portion 61. The fan F is attached to the first plate portion 61 by a mounting frame (not shown) in accordance with the position of the vent 61a. A cylindrical cover member 63 opening in the front-rear direction is attached to the front surface of the first plate portion 61 and is positioned so as to cover the fan F from the outer periphery side. The vent 61a of the first plate portion 61 and the fan F are positioned forward of the range in which the intake port 51 is formed in the rear panel 28.

[0018] In this way, the machine room 16 is arranged in the following order from the front to the rear with respect to the compressor CM: the fan F, the condenser CD, and the rear panel 28 (air intake 51), and the exhaust 52 of the right side panel 32 opens to the right of the compressor CM. That is, air (outside air) taken into the machine room 16 from the air intake 51 passes through the condenser CD toward the front and is sent out from the fan F toward the compressor CM. When outside air is taken into the machine room 16 from the air intake 51, the air inside the machine room 16 passes around the compressor CM (enclosed space 55) and is discharged from the exhaust 52 as if being pushed out to the right side of the box body 12, thereby ventilating the machine room 16.

[0019] The enclosed space 55 in the machine room 16 has, on the compressor CM side (front side) of the shroud 60 (first plate portion 61), excluding the side where the condenser CD is arranged, an area between the fan F (its rotational operating range) and the compressor CM (hereinafter referred to as the "opposing area 55a"), a spatial portion formed between the first plate portion 61 and the compressor CM so as to connect the right end of the opposing area 55a and the exhaust port 52 (hereinafter referred to as the "first area 56"), and a spatial portion formed between the partition plate 36 / front panel 26 and the compressor CM so as to connect the left end of the opposing area 55a and the exhaust port 52 (hereinafter referred to as the "second area 57"). Here, in the refrigerated showcase 10, the right edge of the rear panel 28 in which the intake port 51 is formed and the rear edge of the right side panel 32 in which the exhaust port 52 is formed are connected, the plate surface of the rear panel 28 and the plate surface of the right side panel 32 are in a positional relationship in which they face in a perpendicular direction, and the exhaust port 52 is positioned biased to the right with respect to the intake port 51, so that the moving distance of the air passing from the facing region 55a to the exhaust port 52 through the first region 56 is significantly shorter than the moving distance of the air passing from the facing region 55a to the exhaust port 52 through the second region 57. That is, the first region 56 functions as a direct path in which the air taken into the machine room 16 goes directly to the exhaust port 52, so that the moving distance of the air in the machine room 16 is short in the flow of the air passing through the first region 56 and discharged from the exhaust port 52, and sufficient heat exchange with the compressor CM is not performed. On the other hand, the second area 57 can function as a bypass path for the air taken into the machine room 16 to bypass and reach the exhaust port 52, but if the air sent out from the fan F flows easily from the facing area 55a to the first area 56, the air will flow less easily in the second area 57, causing the temperature of the compressor CM to rise and the temperature of the entire machine room 16 to also rise. As a result, the temperature of the compressor CM and related devices in the machine room 16 will rise, which may cause problems. Therefore, in this embodiment, the air flow in the machine room 16 (enclosed space 55) is controlled by an obstruction means (capacitor 70) described later, thereby achieving sufficient heat exhaust from the compressor CM.

[0020] (Regarding the inhibiting means (capacitor 70)) As shown in FIG. 5, the shroud 60 is provided with a support piece 64 extending forward from the upper end of the right edge of the first plate portion 61, and a band-shaped fixed plate 65 facing the left side surface of the support piece 64. The support piece 64 and the fixed plate 65 are used to fix a capacitor (inhibiting means) 70 electrically connected to the drive source of the compressor CM. The capacitor 70 is a start capacitor that imparts starting torque to a motor (single-phase induction motor) serving as the drive source of the compressor CM, and is cylindrical as a whole. The capacitor 70 is a consumable item (when deterioration progresses, a decrease in starting torque, an increase in current, vibration, etc. occur), and is therefore provided replaceably outside the compressor CM. The capacitor 70 is generally provided in a position in the machine room 16 where replacement work is easy, for example, on the ceiling surface of the machine room 16. In contrast, in the present embodiment, capacitor 70 is sandwiched between support piece 64 and fixed plate 65, and in this state, the extended ends (front ends) of fixed plate 65 and support piece 64 are screwed in place, thereby fixing capacitor 70 to the right side of the front surface of shroud 60 (first plate portion 61).

[0021] Here, capacitor 70 is disposed in a position in enclosed space 55 where it can obstruct the flow of air from the delivery side (front end of the rotational operation range) of fan F toward the side where exhaust port 52 is located (i.e., it functions as obstruction means). Specifically, capacitor 70 is disposed in enclosed space 55 in machine room 16, in front of first plate portion 61, in first region 56 or in a position on the right side (closer to exhaust port 52) ​​in opposing region 55a, whereby capacitor 70 comes into contact with the air delivered from fan F and guides the air to flow more toward second region 57 than toward first region 56. Here, a more specific position (range) of capacitor 70 in this embodiment will be described with reference to Figs. 4 to 6. The range that the capacitor 70 occupies in the left-right direction of the machine room 16 is a range whose left end is a position adjacent to the fan F from the right (a position adjacent to the right side surface of the cover member 63 that surrounds the fan F from the outer periphery) and whose right end is a position overlapping with the right end of the first plate portion 61 in the front-rear direction. That is, as shown in Fig. 6, the capacitor 70 in this embodiment is disposed in a position (the left end portion of the first region 56) adjacent to the opposing region 55a (the front region of the fan F) from the right side. Also, the range that the capacitor 70 occupies in the front-rear direction of the machine room 16 is a range whose rear end is a position adjacent to the front surface of the first plate portion 61 and whose front end is a position slightly forward of the rear end of the compressor CM. 4, the range that capacitor 70 occupies in the vertical direction of machine room 16 has an upper end at a position above fan F (rotational operation range) or cover member 63 and overlapping with the upper edge of first plate portion 61 in the front-to-rear direction, and a lower end at a position below fan F (rotational operation range) or cover member 63. That is, in this embodiment, the vertical dimension of capacitor 70 is larger than the vertical dimension of fan F (rotational operation range), and the entire fan F (rotational operation range) is located in the range from the upper end to the lower end of capacitor 70, and capacitor 70 is disposed in accordance with the height position of fan F.

[0022] As shown in FIG. 4, the capacitor 70 is disposed in a posture (vertical posture with the longitudinal direction facing up and down) along the extending direction (vertical direction) of the gap between the shroud 60 (first plate portion 61) and the compressor CM, and fills a wide range of the gap between the shroud 60 (first plate portion 61) and the compressor CM in the vertical and front-to-rear directions. As shown in FIG. 6, the capacitor 70 is located in the first region 56, and its front side is close to the compressor CM, narrowing the path through which air can go directly to the exhaust port 52 in the first region 56 (note that the portion where the movement path of air is narrowed is hereinafter referred to as the "narrowed portion 56a"). That is, the air flow resistance is large in the narrowed portion 56a of the first region 56, and it becomes difficult for the air from the opposing region 55a to pass through the narrowed portion 56a. Therefore, although some air passes through the narrowed portion 56a, most of the air does not pass through the narrowed portion 56a and flows toward the opposing region 55a. The air flowing toward the opposing region 55a in this way is pushed by the air sent out from the fan F immediately thereafter, and proceeds to the second region 57 in the enclosed space 55, which is separated from the exhaust port 52. As a result, the flow of air from the first region 56 to the exhaust port 52 is suppressed, and the flow of air from the second region 57 to the exhaust port 52 is increased. By disposing the capacitor 70 at a position that functions as an obstruction means in the enclosed space 55 of the machine room 16 in this way, the air taken in from the outside into the machine room 16 flows sufficiently to the second region 57. That is, this configuration can sufficiently solve the problem of the air flow in the conventional machine room 16, that the air from the fan F tends to go straight to the exhaust port 52 through the first region 56. The capacitor 70 is not disposed to completely block the movement path of the air going straight from the delivery side of the fan F to the exhaust port 52, but is disposed to ensure a narrowed portion 56a between the capacitor 70 and the compressor CM. Therefore, in accordance with the rotation of the fan F, air flows not only through the second region 57 but also through the first region 56 around the compressor CM, and the air around the compressor CM flows overall, efficiently exchanging heat with the entire outer peripheral surface of the compressor CM, and is then discharged from the machine room 16.

[0023] (Regarding the second inhibiting means (expansion valve EV)) In addition to the above-mentioned obstruction means (capacitor 70), in this embodiment, the expansion valve EV connected to the evaporator EP through the refrigerant pipe P (the specific refrigerant pipe Pa) is arranged to function as a second obstruction means for obstructing the movement of air upward from the facing region 55a. Specifically, as shown in Figs. 3 and 4, the expansion valve EV is arranged to be located above the facing region 55a of the fan F and the compressor CM. As described above, in the facing region 55a, the flow of air passing through the fan F and moving from the facing region 55a to the first region 56 is obstructed by the capacitor 70. In this case, when air that has come into contact with the capacitor 70 moves upward, the air passes through the capacitor 70 and passes through the exhaust port 52 via the first region 56, and sufficient heat exchange with the compressor CM is not performed. Therefore, by arranging the expansion valve EV so as to cover the facing region 55a from above, the air sent from the fan F to the compressor CM side is restricted from rising from the facing region 55a and is guided to flow to the second region 57. 2 to 4, the expansion valve EV is provided with insulation 75 to prevent condensation, and has a horizontally wide, flat shape as a whole. The entire expansion valve EV including the insulation is located above the facing region 55a so as to cover a range that exceeds the front-rear distance from the rear end position of the compressor CM to the front end position of the fan F (the front end position of the cover member 63). A part (right part) of the insulation 75 is located so as to cover from above in a close position to the upper surface of the capacitor 70 disposed at the upper right part of the shroud 60, thereby narrowing the gap between the expansion valve EV and the capacitor 70.

[0024] (Regarding the third obstruction means (specific refrigerant piping Pa)) Furthermore, in this embodiment, in addition to the above-mentioned obstruction means (capacitor 70) and second obstruction means (expansion valve EV), the specific refrigerant pipe Pa connecting the expansion valve EV and the evaporator EP is arranged to function as a third obstruction means for obstructing the movement of air upward from the left end of the facing region 55a or the rear end of the second region 57. Specifically, as shown in Figs. 2 and 3, the specific refrigerant pipe Pa is arranged to be folded back in a serpentine shape on the upper left side of the expansion valve EV, and covers the region of the enclosed space 55 from the left end of the facing region 55a to the rear end of the second region 57 from above. In addition, the outer surface of the specific refrigerant pipe Pa is covered with the heat insulating material 38 as described above, and the diameter dimension is greatly enlarged by this heat insulating material 38, so that a wide range is covered above the left end of the facing region 55a and the rear end of the second region 57. That is, the specific refrigerant pipe Pa, the outer surface of which is covered with the heat insulating material 38, restricts the air from rising at the left end of the facing region 55a and the rear end of the second region 57, and allows the air to move from the second region 57 to the exhaust port 52. Note that the specific refrigerant pipe Pa does not completely cover the upper positions above the left end of the facing region 55a and the rear end of the second region 57. That is, by allowing the air to rise to the upper part of the machine room 16 to some extent, condensation is prevented from forming on the upper part of the compressor CM and on the refrigerant pipe P.

[0025] [Function of the embodiment] Next, the operation of the refrigerated showcase 10 according to the embodiment will be described with reference to FIG.

[0026] In the refrigerated showcase 10 of the embodiment, air (outside air) is taken into the machine room 16 from the rear air intake 51 by the rotation of the fan F disposed in the machine room 16. The air (outside air) that has passed through the air intake 51 passes forward through the condenser CD, passes through the vent 61a formed in the first plate portion 61 of the shroud 60, and is blown forward (the opposing region 55a of the fan F and the compressor CM) by the fan F. As the compressor CM is disposed in front of the fan F, the air blown out from the fan F comes into contact with the rear part of the outer circumferential surface of the compressor CM. Here, since the capacitor (obstruction means) 70 is located in the first region 56, the air that tries to take a shortcut from the facing region 55a to the right exhaust port 52 due to contact with the outer circumferential surface of the compressor CM forms a narrowed portion 56a between the capacitor 70 and the compressor CM in the first region 56, narrowing the path of the air sent out from the fan F going directly to the exhaust port 52, and thus the movement toward the exhaust port 52 is obstructed. Therefore, although part of the air that reaches the narrowed portion 56a passes through the narrowed portion 56a (first region 56) and reaches the exhaust port 52, most of the air changes its moving direction and proceeds to the second region 57. That is, the flow of air from the first region 56 to the exhaust port 52 is suppressed, and the flow of air from the second region 57 to the exhaust port 52 is increased. The upper part of the facing region 55a is covered by the expansion valve EV provided with insulation 75. In addition, the upper part of the region from the left end of the facing region 55a to the rear end of the second region 57 is covered by a specific refrigerant pipe Pa insulated with the insulating material 38. Therefore, the air in the facing region 55a flows toward the side away from the first region 56 and the exhaust port 52, i.e., toward the second region 57 of the enclosed space 55, in response to the continuous blowing of air from the fan F thereafter. The air that travels from the facing region 55a through the second region 57 to the exhaust port 52 comes into contact with a wide area of ​​the outer circumferential surface of the compressor CM, and therefore exchanges heat sufficiently with the compressor CM, and is discharged to the outside from the exhaust port 52 in a heated state.

[0027] In this way, the refrigerated showcase 10 of the embodiment is configured to have an obstruction means (capacitor 70) that obstructs the air flow from the sending side of the fan F toward the position of the exhaust port 52 (air flow through the first area 56 to the exhaust port 52), so that the amount of air flowing through the path (second area 57) away from the exhaust port 52 in the enclosed space 55 increases, and air stagnation in the machine room 16 is suppressed. Therefore, the compressor CM sufficiently dissipates heat, the machine room 16 is efficiently ventilated, and an excessive temperature rise in each device (compressor CM, condenser CD, and other related devices) in the machine room 16 is prevented. That is, adverse effects due to the heat generated by the compressor CM (such as reducing the durability of the compressor CM and related devices to shorten their lifespan) can be suppressed.

[0028] Here, by using a capacitor 70 electrically connected to the driving source of the compressor CM as an impeding means, it is possible to suppress disadvantages such as an increase in the number of components in the machine room 16, cluttering of the machine room 16, and increased costs.

[0029] In addition, the expansion valve EV, which is connected via a refrigerant pipe P to the evaporator EP that cools the storage chamber 14 in which goods are stored in a cooled state, is disposed in the machine room 16 so as to be located above the opposing region 55a of the fan F and the compressor CM, and thus the movement of air upward from the opposing region 55a due to contact with the compressor CM and the capacitor 70 can be inhibited by the expansion valve EV, and the air can be guided to a path (second region 57) on the side of the enclosed space 55 that is away from the exhaust port 52. This increases the amount of air flowing into the second region 57, and prevents air from stagnating in the machine room 16, thereby preventing adverse effects of heat generated by the compressor CM (such as adverse effects that reduce the durability and shorten the lifespan of the compressor CM and related devices).

[0030] [Example of change] The present invention is not limited to the configurations of the above-described embodiments, but can be modified as follows, for example. (1) In the embodiment, a configuration has been described in which an obstruction means prevents the air blown out from the fan from going directly to the exhaust port (the obstruction means guides the air to bypass the compressor and reach the exhaust port) for a refrigerated showcase in which a storage chamber and a machine chamber are formed side by side inside a box body. However, the obstruction means of the present invention can be applied to a refrigerated showcase in which a storage chamber and a machine chamber are formed side by side inside a box body as long as an air intake port is formed in the back panel (rear panel) that forms the machine chamber and an exhaust port is formed in the side panel (right side panel). (2) In the embodiment, the machine room is formed on the right side of the storage room inside the box body, but the machine room may be formed on the left side of the storage room (i.e., the positional relationship with the storage room may be reversed). In this case, the machine room is formed by the upper surface of the left end of the box body base, the lower surface of the left end of the top panel, the rear surface of the front panel, the front surface of the rear panel, the left surface of the partition plate, and the right surface of the left side panel, and an intake port is formed in the rear panel (back panel) and an exhaust port is formed in the left side panel (side panel), and a capacitor as an obstruction means can be disposed between the delivery side of the fan in front of the intake port (rear of the compressor) and the exhaust port on the left side of the compressor. In this case, the positional relationship between the compressor, the fan, the condenser, and the rear panel may be the same as in the embodiment. (3) In the embodiment, an obstruction means (capacitor) is provided to obstruct the air blown out from the fan in the machine room from flowing directly to the exhaust port, and a second obstruction means (expansion valve) is provided to be located above the opposing area of ​​the fan and compressor in the machine room and obstruct the movement of air upward from the opposing area. However, even if only an obstruction means (capacitor) is provided and the opposing area is opened upward, the effect of the obstruction means to suppress the adverse effects of heat from the compressor can be expected. (4) In the embodiment, a capacitor electrically connected to the drive source of the compressor is used as the obstruction means for obstructing the flow of air from the blowing side of the fan toward the exhaust port. However, other components (e.g., a dedicated plate-shaped component, etc.) may also be used as the obstruction means. For example, a plate-like member that rises so as to extend upward from the bottom surface of the machine unit (or machine room) and is located closer to the exhaust port (on the first area) than the facing area in front of the fan is provided with its plate thickness direction facing the facing area and the exhaust port, and the plate-like member completely or partially blocks the space between the shroud (condenser) and the compressor (blocks or narrows the air movement path in the first area). By configuring it in this way, the plate-like member can function as an obstruction means. (5) In the embodiment, the obstruction means (capacitor) is disposed at the left end of the first region (close to the opposing region), but the obstruction means may be disposed at a position closer to the exhaust port in the opposing region, or may be disposed at the right end of the first region along the side plate (right side panel). Even with such an obstruction means placement, the obstruction means can obstruct the air flow from the blowing side of the fan toward the exhaust port, thereby increasing the amount of air flowing through the path (second region) on the side of the enclosed space that is away from the exhaust port. (6) In the embodiment, the lower end of the rotational operating range of the fan is configured to be lower than the lower end of the obstruction means (capacitor). However, even if the lower end of the rotational operating range of the fan is configured to be lower than the lower end of the obstruction means, for example, if the upper end of the obstruction means is located above the rotational operating range of the fan and the lower end of the obstruction means is located below the center of rotation of the fan, the height position of the rotational operating range of the fan and the height position of the obstruction means overlap over a relatively wide range. Therefore, the position of the obstruction means in this case can be said to be aligned with the height position of the rotational operating range of the fan (the opposing area in front of it), and the obstruction means can efficiently obstruct the flow of air from the outlet side of the fan toward the exhaust port. In addition, in the embodiment, the entire rotational operating range of the fan is positioned within the range from the upper end to the lower end of the obstruction means in the vertical range of the machine room. However, for example, if the vertical dimension of the obstruction means is smaller than the vertical dimension of the rotational operating range of the fan, the entire obstruction means can be positioned within the range from the upper end to the lower end of the rotational operating range of the fan, so that the obstruction means can be positioned to match the height position of the rotational operating range of the fan (the opposing area in front of it). (7) In the embodiment, a cover surrounding the fan is provided on the front surface of the first plate portion of the shroud, and the inner space of the cover is described as the rotational operation range of the fan, but the cover may be omitted. In the configuration in which the fan (rotational operation range) is covered from the outer periphery with a cover as in the embodiment, the air from the fan (rotational operation range) is sent forward (opposing area with the compressor), and the cover prevents the air from being sent in the radial direction of the fan. In contrast, when the cover is omitted, the air from the fan (rotational operation range) is basically sent forward (opposing area), but to some extent, it is sent in the radial direction of the fan (rotational operation range). In this case, the air sent in the radial direction from the fan can move directly to the first area without passing through the opposing area, but by arranging a capacitor as an obstruction means so as to be close to the outer periphery of the fan (rotational operation range) as in the embodiment, the movement of the air sent in the radial direction from the fan to the first area can be suitably obstructed by the capacitor. (8) In the embodiment, an expansion valve connected to the evaporator via a refrigerant piping is used as the second obstruction means located above the opposing area of ​​the fan and compressor in the machine room and obstructing the movement of air upward from the opposing area. However, other components (e.g., a dedicated plate-shaped component, etc.) may also be used as the obstruction means. (9) In the embodiment, an expansion valve with added insulation is used, but an expansion valve without added insulation may be used as the second obstruction means. [Explanation of symbols]

[0031] 12 box body, 14 storage room, 16 machine room, 28 rear panel, 32 right side panel (side panel), 51 intake port, 52 exhaust port, 55a opposing region, 57 second region (path), 70 capacitor (obstruction means), CM Compressor, EP Evaporator, EV Expansion valve, F Fan, P Refrigerant piping

Claims

1. A refrigerated showcase comprising: a machine room (16) provided on one side of the inside of a box body (12) constituting an outer shell, accommodating a compressor (CM) and a fan (F); an air intake port (51) formed in a back plate (28) forming the machine room (16) for allowing outside air to flow into the machine room (16) by operation of the fan (F); and an exhaust port (52) formed in a side plate (32) forming the machine room (16) for allowing air in the machine room (16) to flow out to the outside by operation of the fan (F), wherein the compressor (CM) is disposed on the opposite side of the air intake port (51) across the fan (F), A first obstruction means (70) is provided between the exhaust port (52) and the discharge side of the fan (F) in an enclosed space (55) of the compressor (CM) formed in the machine room (16) so as to communicate with the exhaust port (52), for obstructing the flow of air from the discharge side of the fan (F) toward the position of the exhaust port (52) and guiding the air to a path (57) on the side of the enclosed space (55) away from the exhaust port (52), a second obstruction means (EV) for obstructing an upward air flow from an opposing region (55a) of the fan (F) and the compressor (CM) is provided in the machine room (16) above the opposing region (55a), the first obstruction means (70) is disposed between a cylindrical cover member (63) covering an outer periphery of the fan (F) and the side plate (32) in which the exhaust port (52) is provided, so as to extend from above to below the cover member (63), and the entire fan (F) is positioned within a range from the upper end to the lower end of the first obstruction means (70); The second obstruction means (EV) is configured to cover an area above the opposing region (55a) that exceeds the front-rear distance from the rear end position of the compressor (CM) to the front end position of the cover member (63). A refrigerated showcase characterized by the above.

2. 2. The refrigerated showcase according to claim 1, wherein air is allowed to flow between the first obstruction means (70) and the bottom surface of the machine room (16), and the second obstruction means (EV) is configured to reach the upper surface of the first obstruction means (70).

3. A refrigerated showcase as described in claim 1 or 2, wherein a narrowed portion (56) through which air can flow is formed between the first obstruction means (70) and the compressor (CM).

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