JP2022139770A - Cooling device - Google Patents

Abstract

To ease local increase of an indoor temperature due to hot air discharged from an exhaust heat structure in a cooling device.SOLUTION: An exhaust heat structure 22 of a cooling device of the invention includes: a first passage 29 in which hot air from a condenser fan 16, which has been subjected to heat exchange, flows; a second passage 30 which is provided adjacent to the first passage 29 and receives hot air from the first passage 29; a front wall 35 oriented to the front side and defining a front end of the second passage 30; left and right side walls 32 oriented to a lateral direction and defining left and right ends of the second passage 30; a first exhaust fan 33 provided on the front wall 35; and a second exhaust fan 34 provided on at least one of the left and right side walls 32. Hot air that has been subjected to heat exchange is dispersedly discharged in a forward direction and the lateral direction by the first exhaust fan 33 and the second exhaust fan 34.SELECTED DRAWING: Figure 2

Description

Application for application of Article 30, Paragraph 2 of the Patent Act has been filed Sales date: November 26, 2020 Sales destination: Lawson Mitsugicho store

TECHNICAL FIELD The present invention relates to a cooling device in which a condenser, a condenser fan, and the like, which constitute a cooling mechanism, are arranged in a machine compartment in the upper part of a main body case. The cooling device of the present invention can be applied to showcases, refrigerators, freezers, and the like.

In the cooling system where the condenser, condenser fan, compressor, etc. are arranged in the machine room (mechanical section) in the upper part of the main body case, in order to prevent the hot air from accumulating above the cooling system after heat exchange. In addition, a heat exhaust structure that forcibly exhausts hot air may be provided in the upper part of the machine room. For example, in the cooling device of Patent Document 1, an exhaust duct is provided at the rear part of the upper wall of the machine room, and the hot air after heat exchange is forced forward in the machine room by a blower fan provided inside the exhaust duct. allowing it to be discharged. The exhaust duct is composed of a pair of left and right side plates, a curved hood fixed between the side plates, flanges fixed to the front and rear of the hood, and the like. The upper wall of the machine room has the first and second openings in a cross shape, and by changing the mounting position of the exhaust duct with respect to each opening, the direction of the exhaust duct can be changed back and forth or It can be changed left and right. In addition, in Patent Document 1, a circular passage is formed in the rear part of the upper wall of the machine room, and a mounting disk corresponding to a pair of front and rear flanges is fixed to the hood to further change the direction of the exhaust port of the exhaust duct. An embodiment is also disclosed that enables this.

JP-A-2000-18794

According to the heat exhaust structure of Patent Literature 1, the orientation of the exhaust port of the exhaust duct can be appropriately changed according to the installation location of the cooling device, the surrounding conditions of the cooling device, and the like. However, since all the hot air after heat exchange is discharged intensively in a certain direction from the outlet of the exhaust duct, the room temperature in the hot air discharge area tends to rise more than the surrounding area. Especially in commercial refrigerators, the cooling capacity of the cooling mechanism is large, and a large amount of hot air is exhausted intensively.

SUMMARY OF THE INVENTION An object of the present invention is to mitigate a local increase in room temperature caused by hot air discharged from a heat exhaust structure in a cooling device.

The present invention includes a condenser 15, a condenser fan 16, and a heat exhaust structure for discharging hot air after heat exchange supplied from the condenser fan 16 into a machine compartment 11 formed in the upper part of the main body case 1. 22 is installed. The heat exhaust structure 22 includes a first flow path 29 through which hot air from the condenser fan 16 after heat exchange flows, and a second flow path 29 provided adjacent to the first flow path 29 and receiving hot air from the first flow path 29 . A flow path 30, a front wall 35 directed forward and partitioning the front end of the second flow path 30, left and right side walls 32 facing in the left-right direction and partitioning the left and right ends of the second flow path 30, and a front wall. 35 and a second exhaust fan 34 provided on at least one of the left and right side walls 32 . After the heat exchange, the hot air is dispersed and discharged forwardly and laterally by the first exhaust fan 33 and the second exhaust fan 34 . The left and right side walls 32 may be provided at the left and right ends of the second flow path 30, respectively, or may be provided at only one of the left and right sides.

The heat exhaust structure 22 includes an exhaust cover 28 that defines an upper portion of the first flow path 29 . The second flow path 30 is arranged behind the first flow path 29 . The second flow path 30 includes a left and right horizontally long front wall 35, a left and right horizontally long rear wall 36 facing the front wall 35, an upper wall 37 connecting the front and rear walls 35 and 36, and left and right side walls 32 oriented in the left and right direction. are separated by A first exhaust fan 33 is arranged in a front exhaust port 40 opened in the front wall 35 , and a second exhaust fan 34 is arranged in side exhaust ports 41 opened in the left and right side ends 32 . A front exhaust port 40 is opened above the exhaust cover 28 .

The front exhaust port 40 and the side exhaust port 41 are opened above the upper ends of the front panel 12 and the side panel 13 that define the machine compartment 11 .

It is desirable to set the total amount of air blown by the first exhaust fan 33 and the second exhaust fan 34 to be equal to or larger than the amount of air blown by the condenser fan 16 .

Like the cooling device of the present invention, the heat exhaust structure 22 is composed of the first exhaust fan 33 provided on the front wall 35 that defines the front end of the second flow path 30, and the left and right ends of the second flow path 30. Including the second exhaust fan 34 provided on the left and right side walls 32, the hot air after heat exchange is dispersed in the front direction and the left and right direction by the first exhaust fan 33 and the second exhaust fan 34. Compared to the conventional configuration in which the hot air after heat exchange is concentrated in one direction, the hot air discharged from the heat exhaust structure 22 locally increases the indoor temperature. You can definitely prevent it from rising. In addition, this type of cooling device is often installed in a state in which not only the rear surface but also one of the left and right side surfaces faces the surrounding wall of the room such as a store. In addition, since the hot air can be dispersed and discharged from the left and right directions that do not face the surrounding wall of the store, it is possible to reliably prevent the hot air from locally rising only in one direction. In addition, even when the cooling device is installed in a room with a small spatial volume, it is possible to prevent temperature variations in the room.

The second flow path 30 is arranged behind the first flow path 29, and the front exhaust port 40 in which the first exhaust fan 33 is arranged is located above the exhaust cover 28 that partitions the upper side of the first flow path 29. To prevent inconvenience such as hot air sent out from a front exhaust port 40 by a first exhaust fan 33 being received by an exhaust cover 28 and staying above a machine compartment 11 when opened. can be done. Therefore, hot air after heat exchange can be efficiently discharged from the exhaust heat structure 22 .

When the front exhaust port 40 and the side exhaust port 41 are opened above the upper ends of the front panel 12 and the side panels 13 that define the machine compartment 11, they are received by the front panel 12 and the side panels 13. , can be reliably prevented from staying above the machine section 11 .

If the total amount of air blown by the first exhaust fan 33 and the second exhaust fan 34 is set equal to or larger than the amount of air blown by the condenser fan 16, the hot air after heat exchange is surely discharged from the heat exhaust structure 22. can be discharged.

1 is a front view of a main part of a cooling device according to an embodiment of the present invention; FIG. It is a perspective view of a cooling device. It is a partially broken plan view of the main part of a cooling device. It is a vertical side view of the principal part of a cooling device. FIG. 3 is an exploded perspective view of a heat exhaust structure that constitutes the cooling device; It is a vertical side view which shows the mounting structure of right-and-left side walls.

(Embodiment) FIGS. 1 to 6 show an embodiment in which a cooling device according to the present invention is applied to a showcase. Front and back, left and right, and up and down in this embodiment follow the crossed arrows shown in FIGS. In FIG. 2, the showcase is composed of a vertically long square box-shaped main body case 1, a door 3 that opens and closes the front opening of the refrigerator compartment 2 inside the main body case 1, a cooling mechanism that supplies cool air to the refrigerator compartment 2, and the like. be. The refrigerating chamber 2 is surrounded by a heat-insulating box, and a plurality of stages of display shelves 5 are provided inside. Inside the showcase, a cold air circulation path is formed over the bottom wall of the refrigerating chamber 2, the rear wall of the refrigerating chamber 2, and the top wall of the refrigerating chamber 2. An evaporator 19 constituting a cooling mechanism, an evaporator fan, and the like are housed inside the passage. A suction port for introducing the air in the refrigerator compartment 2 is formed in the front part of the lower cold air circulation path, and the cold air cooled by the evaporator 19 is introduced into the refrigerator compartment in the front part of the upper cold air circulation path. 2 is formed with an outlet for blowing out toward the inside. The door 3 is swingably opened and closed by a handle 8 provided on one side thereof. In this embodiment, as shown in FIG. 2, the showcase is installed such that the left side and the rear face face the surrounding walls in the store.

As shown in FIGS. 2 and 3, a machine compartment 11 is formed in the upper portion of the main body case 1. As shown in FIG. The machine compartment 11 is partitioned by a front panel 12 and left and right side panels 13, 13, and has a bottomed dish shape with openings on the upper and rear surfaces. A unit base 14 is fixed inside the machine compartment 11, and a condenser 15, a condenser fan 16, a compressor 17, a pre-stage condenser 18, and the like, which constitute a cooling mechanism, are arranged on the base 14. ing. Further, inside the machine compartment 11, a heat exhaust structure 22 is installed for exhausting the hot air after heat exchange that is supplied by the condenser fan 16. As shown in FIG. The front panel 12 is made of a horizontally elongated press-molded product, and has a front wall formed with louver openings 12a in multiple steps. The side panels 13, 13 are made of vertically elongated metal panels press-formed to cover the left and right sides of the body case 1, and cooperate with the front panel 12 to partition the top wall of the body case 1. As shown in FIG. A control box 23 for controlling the operating state of the cooling mechanism is provided on the left side of the machine compartment 11 .

Left and right side surfaces and an upper surface of the condenser 15 are covered with a condenser cover 24 fixed to the unit base 14 . A filter 25 is arranged on the front inner surface of the condenser cover 24 , and a pair of left and right condenser fans 16 are arranged on the rear inner surface of the condenser cover 24 . Left and right side surfaces and an upper surface of the pre-stage condenser 18 are covered with a pre-stage condenser cover 26 . When the condenser fan 16 is activated, the indoor air passes through the condenser 15 through the louver opening 12a and the filter 25, exchanges heat with the refrigerant liquid, and is pressurized by the condenser fan 16. to the compressor 17 and the pre-condenser 18 . The pre-stage condenser 18 exchanges heat with the refrigerant liquid supplied from the compressor 17 to preliminarily lower the temperature of the refrigerant liquid, and supplies the refrigerant liquid to the condenser 15 .

The heat exhaust structure 22 is provided adjacent to a first flow path 29 through which hot air pressurized by the condenser fan 16 flows, and the rear end of the first flow path 29 to receive the hot air from the first flow path 29. A second flow path 30, a first exhaust fan 33 provided on a front wall 35 of the second flow path 30, and a second exhaust fan 34 provided on side end cases (left and right side walls) 32 of the second flow path 30. and The first flow path 29 is a gap whose upper side is partitioned by a flat exhaust cover 28, and the compressor 17, the pre-stage condenser 18, and the like are arranged therein. A hot air outlet 27 is formed at the rear end of the first flow path 29 , and the hot air pressurized by the condenser fan 16 flows into the second flow path 30 through the hot air outlet 27 .

The second flow path 30 includes an exhaust case 31 covering the rear and rear upper portions of the hot air outlet 27, a square frame-shaped side end case 32 covering one upper portion of the side opening of the exhaust case 31, and a front wall of the exhaust case 31. A first exhaust fan 33 mounted on the 35 and a second exhaust fan 34 mounted on the side end case 32 are provided. As described above, the showcase according to the present embodiment is arranged in such a manner that the left side and the rear face of the showcase face the surrounding walls of the store, so that the side end case 32 is positioned above the right opening of the exhaust case 31. are placed.

As shown in FIG. 5, the exhaust case 31 includes a horizontally long front wall 35 covering the hot air outlet 27 above, a horizontally long rear wall 36 facing the front wall 35 and the hot air outlet 27, a front wall 35 and a rear wall. It consists of a pressed product integrally provided with an upper wall 37 connecting 36 . A circular front exhaust port 40 is opened in the left-right center of the front wall 35 of the exhaust case 31 , and a circular side exhaust port 41 is opened in the central portion of the side end case 32 . Screw passage holes 43 for fan screws 42 are formed at four locations around each of the exhaust ports 40 and 41 . Two screw passage holes 45 for case screws 44 are formed on both sides of each of the front wall 35 , rear wall 36 and upper wall 37 of the exhaust case 31 . Fastening seats 35a and 36a are formed by bending the lower end of the front wall 35 and the lower end of the rear wall 36, and a plurality of screw passage holes are formed in each of the fastening seats 35a and 36a. The front exhaust port 40 and the side exhaust port 41 are provided above the upper ends of the front panel 12 and the side panels 13 in order to more effectively deliver the hot air supplied from the hot air outlet 27 to the exhaust case 31 . ing. Further, the front exhaust port 40 and the side exhaust port 41 are provided above the exhaust cover 28 .

At the four corners of the first exhaust fan 33 and the second exhaust fan 34, insertion holes 33a and 34a for the fan screws 42 are formed. 5 and 6, reference numeral 46 denotes a nut to be screwed onto the fan screw 42. As shown in FIG. A fastening seat 35a at the lower end of the front wall 35 of the exhaust case 31 overlaps the rear upper surface of the exhaust cover 28 and is fixed to the rear portion of the front stage condenser cover 26 with fastening screws (threaded body) 47. A fastening seat 36 a at the lower end of the wall 36 is fixed to the upper wall of the main body case 1 with fastening screws 47 . The fan screws 42 and the case screws 44 are screwed from the outer surfaces of the front wall 35 , the rear wall 36 and the upper wall 37 of the exhaust case 31 and the outer surface of the side end case 32 . The side end case 32 has square side walls 50 and peripheral walls 51 formed by bending the front and rear edges and upper edges of the side walls 50 . A boss 52 is formed.

The front portion of the exhaust cover 28 is fixed to the upper rear portion of the condenser cover 24 with a fastening screw 47 screwed into the upper rear portion of the condenser cover 24 to define the first flow path 29 , and the rear portion of the exhaust cover 28 is fixed to the upper rear portion of the front stage condenser cover 26 . polymerized to Also, the second flow path 30 can be assembled to the machine section 11 by, for example, the following procedure. The first exhaust fan 33 is fixed in advance to the front wall 35 with the fan screw 42 and the nut 46, and the side end case 32 to which the second exhaust fan 34 is mounted is arranged in the right side opening of the exhaust case 31. It is fixed with a screw 44 for the case. The fastening seat 35 a of the front wall 35 of the exhaust case 31 in this state is placed on the rear portion of the exhaust cover 28 , and the fastening seat 36 a of the rear wall 36 is placed on the upper wall of the main body case 1 at the same time. In this state, the fastening seat 35a is fixed to the rear part of the exhaust cover 28 and the front stage condenser cover 26 in the overlapped state with the fastening screw 47, and the fastening seat 36a is attached to the upper wall of the main body case 1 with the fastening screw 47. fixed. In this way, when the exhaust case 31 is fixed so as to cover the upper side of the components installed in the machine section 11 in the upper part of the main body case 1, the attachment and detachment of the second flow path 30 can be easily performed.

When the cooling mechanism is operating, hot air after heat exchange is sent by the condenser fan 16 through the first flow path 29 toward the hot air outlet 27, cooling the compressor 17 on the way, and further Pass through pre-condenser 18 . At this time, even if the hot air hits the compressor 17 and flows upward, most of the hot air is guided by the exhaust cover 28 to the hot air outlet 27 because the upper part of the compressor 17 is covered with the exhaust cover 28 . flow towards. Therefore, most of the hot air delivered by the condenser fan 16 can flow toward the interior of the second flow path 30 via the hot air outlet 27 .

Inside the second flow path 30, the hot air is received by the rear wall 36, flows upward inside the exhaust case 31, is sucked into the first and second exhaust fans 33 and 34, and then flows into the exhaust case. 31 and discharged in a distributed manner toward the front and sides. Therefore, even if the cooling device is installed in a room with a small spatial volume, it is possible to alleviate the local temperature rise in the room caused by the hot air discharged from the heat exhaust structure 22 and reduce the temperature unevenness in the room.

The front exhaust port 40 formed in the front wall 35 and the side exhaust port 41 formed in the side end case 32 are positioned above the upper ends of the front panel 12 and the side panels 13 forming the machine compartment 11. The hot air sent out from the front exhaust port 40 by the first exhaust fan 33 and the hot air sent out from the side exhaust port 41 by the second exhaust fan 34 are received by the front panel 12 and the side panel 13, Retention above the machine section 11 can be reliably prevented. Therefore, the hot air after heat exchange can be effectively discharged by the exhaust heat structure 22, and the cooling efficiency can be improved.

After arranging the condenser 15, the compressor 17, and the pre-stage condenser 18 in the machine compartment 11, the front part of the exhaust cover 28 is fixed to the condenser cover 24, and the fastening provided at the lower end of the front wall 35 of the exhaust case 31 Since the seat 35a and the rear part of the exhaust cover 28 are overlapped and fixed to the front stage condenser cover 26 with the fastening screw 47, the fastening seat 35a of the front wall 35 and the exhaust cover 28 are fastened with the fastening screw 47 to the front stage condenser cover. can be fixed to the vessel cover 26 at the same time. As a result, labor for assembling the exhaust cover 28 and the exhaust case 31 can be reduced, and the number of fastening screws 47 required for fastening the fastening seat 35a and the exhaust cover 28 can be reduced, contributing to cost reduction of the heat exhaust structure 22. can be done. Further, since the condenser cover 24 and the front-stage condenser cover 26 are connected by the exhaust cover 28, most of the hot air after the heat exchange sent from the condenser fan 16 is surely sent to the exhaust case 31 to cool the air. The cooling efficiency of the mechanism can be improved.

The side end case 32 is fastened to the exhaust case 31 with case screws 44 screwed from the outer surfaces of the walls 35, 36, and 37 of the exhaust case 31, and the first exhaust fan disposed at the front exhaust port 40. 33 and the second exhaust fan 34 arranged at the side exhaust port 41 are fastened with the fan screw 42 screwed from the outer surface of the exhaust case 31 and the side end case 32. Therefore, the fan screw 42 and the case The screw 44 can be tightened and loosened on the outer surface side of the exhaust case 31 and the side end case 32 . Therefore, maintenance of the first and second exhaust fans 33 and 34 and change of the mounting position of the side end case 32 can be easily performed with less effort.

Since the total amount of air blown by the first exhaust fan 33 and the second exhaust fan 34 attached to the exhaust case 31 is set to be equal to or larger than the amount of air blown by the condenser fan 16, most of the hot air after heat exchange is exhausted. The thermal structure 22 can be reliably discharged to further improve the cooling efficiency of the cooling mechanism.

In addition to the above, the side end case 32 can be arranged above the left opening of the exhaust case 31 when the showcase is arranged with its right side and rear side facing the surrounding wall in the store. When the side opening of the exhaust case 31 does not face the surrounding wall in the store, the second exhaust fans 34 are installed on the left and right sides of the exhaust case 31 to direct the hot air after heat exchange to the front and left and right sides of the exhaust case 31. It can be configured to disperse and discharge from three directions. The side end cases 32 may be provided at the left and right ends of the second channel 30, respectively. Pre-stage condenser 18 can be omitted. In this case, the fastening seat 35 a of the exhaust case 31 and the rear portion of the exhaust cover 28 are preferably fastened with fastening screws 47 to a gate-shaped bracket fixed to the unit base 14 . The upper wall 37 of the exhaust case 31 may be formed in a curved hood shape.

1 Main body case 11 Machine compartment 12 Front panel 13 Side panel 15 Condenser 16 Condenser fan 22 Exhaust heat structure 28 Exhaust cover 29 First channel 30 Second channel 32 Left and right side walls (side end cases)
33 First exhaust fan 34 Second exhaust fan 35 Front wall 36 Rear wall 37 Top wall 40 Front exhaust port 41 Side exhaust port

Claims (4)

A condenser (15), a condenser fan (16), and hot air after heat exchange supplied from the condenser fan (16) are placed in a machine compartment (11) formed in the upper part of the main body case (1). A cooling device equipped with a heat exhaust structure (22) that exhausts
The heat exhaust structure (22) includes a first flow path (29) through which hot air from the condenser fan (16) flows after heat exchange, and is provided adjacent to the first flow path (29) to provide the first flow a second flow path (30) for receiving hot air from the passage (29); a front wall (35) directed forward to partition the front end of the second flow path (30); Left and right side walls (32) defining the left and right ends of the flow path (30), a first exhaust fan (33) provided on the front wall (35), and at least one of the left and right side walls (32). a second exhaust fan (34);
It is characterized in that hot air after heat exchange is dispersed and discharged forwardly and laterally by a first exhaust fan (33) and a second exhaust fan (34). Cooling system. The heat exhaust structure (22) includes an exhaust cover (28) that defines an upper portion of the first flow path (29),
The second flow path (30) is arranged behind the first flow path (29),
The second flow path (30) includes a left and right horizontally long front wall (35), a left and right horizontally long rear wall (36) facing the front wall (35), and an upper wall (37) connecting the front and rear walls (35 and 36). ) and left and right side walls (32) oriented in the left and right direction,
A first exhaust fan (33) is arranged in the front exhaust port (40) opened in the front wall (35), and a second exhaust fan (33) is disposed in the side exhaust ports (41) opened in the left and right side ends (32). (34) is arranged,
2. The cooling device according to claim 1, wherein the front exhaust opening (40) is opened above the exhaust cover (28). 3. The method according to claim 2, wherein the front exhaust port (40) and the side exhaust port (41) are opened above the upper ends of the front panel (12) and the side panel (13) that define the machine compartment (11). Cooling system. 4. Any one of claims 1 to 3, wherein the total blowing volume of the first exhaust fan (33) and the second exhaust fan (34) is set equal to or larger than the blowing volume of the condenser fan (16). The cooling device according to .

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