JP2016187515A - Filter cleaning device for heat exchanger of show case and show case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter cleaning device for a heat exchanger of a show case which can be laid out regardless of the width of a show case and achieve easy assembly operation with a simple structure, and provide the show case.SOLUTION: The filter cleaning device for a heat exchanger of a show case includes: a filter 41 arranged at the air upstream side of a heat exchanger, being supported by a condenser 22 of a show case 1 for collecting dust in the air; a brush device 42 which travels within the range of the width of the condenser 22 in a direction orthogonal to an air flow direction; a drive part 43 connected to the condenser 22 for causing the brush device 42 to travel; and a rail 44 connected to the condenser 22 for guiding the travel of the brush device 42. The brush device 42 with a brush body 45 and brush bristles 46 provided on a surface facing the filter 41 of the brush body 45 scraps off dust adhered to the filter 41 by the brush bristles 46 while traveling within the range along the rail by the drive part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a showcase that performs freezing, refrigeration, or heat insulation, and more particularly, to a heat exchanger filter cleaning device that removes dust from a heat exchanger filter disposed in a machine room of the showcase.

  Conventionally, as a frozen and refrigerated showcase installed in a food department, a showcase in which a condenser, a blower for a condenser and the like are arranged in a machine room in a panel unit arranged at the lower part of the showcase body is known. ing. In this type of showcase, a suction port is formed in the front panel of the panel unit for taking in outside air that is heat-exchanged by the condenser. A filter for the condenser and a filter are provided between the suction port and the condenser. And a cleaning device for cleaning.

  As a conventional condenser filter cleaning device, a filter cleaning rotary brush is arranged at a fixed position, the filter is arranged to be movable in the horizontal direction, and the filter is rotated by rotating the rotary brush while moving the filter laterally. There is a cleaning device for cleaning (see, for example, Patent Document 1).

JP 2012-106152 A

  Since the cleaning device of Patent Document 1 is configured to move the filter, it is necessary to secure a moving range of the filter in the panel unit that houses the filter. This moving range requires a length corresponding to the horizontal width of the filter in consideration of cleaning the filter from end to end in the moving direction. For this reason, there is a problem that the cleaning device of Patent Document 1 cannot be applied to a showcase in which the horizontal width of the panel unit is short and the moving range of the filter cannot be secured.

  Moreover, in patent document 1, the motor for moving a filter is fixed to a condenser, the rack gear fixed to the motor shaft is meshed with the rack gear provided in the filter, and the rack gear is sent by rotating the rack gear. The filter is moved laterally. And in order to make the horizontal movement of the filter smooth, a rail is connected to the bottom panel of the panel unit, and the filter moves on this rail. The rotating brush is provided so as to be connected to a condenser so as to be rotatable by a brush motor.

  When assembling the showcase at the time of manufacture, it is difficult to arrange the condenser at the same position in the machine room in each showcase, and the arrangement position of the condenser in the machine room varies. For this reason, when the rotary brush is fixed to the condenser side and the filter is fixed to the bottom panel side of the panel unit as in Patent Document 1, the positional relationship between the rotary brush and the filter is different for each showcase. Variations occur. For this reason, it is necessary to adjust the position of the rotating brush after assembly so that the bristles of the rotating brush are in uniform contact with the filter surface of the filter.

  In Patent Document 1, two motors, a motor for moving the filter and a motor for rotating the rotary brush, are required, so that the number of parts increases and the structure is likely to be complicated. There is a problem that the number of steps required increases and the manufacturing cost increases.

  The present invention has been made in view of the above points, and can be arranged regardless of the width of the showcase, and the filter cleaning for the heat exchanger of the showcase has a simple structure and can facilitate assembly work. An object is to provide a device and a showcase.

  The filter cleaning device for a heat exchanger of a showcase according to the present invention is supported by the heat exchanger of the showcase and is arranged on the air upstream side of the heat exchanger, and a filter that collects dust in the air, and an air flow The brush device that moves within the width of the heat exchanger in the direction orthogonal to the direction, the drive unit that is connected to the heat exchanger and moves the brush device, and the heat exchanger that guides the movement of the brush device The brush device includes a brush body and brush bristles provided on a surface of the brush body facing the filter, and is moved by the drive unit within the range along the rails. It scrapes off the adhering dust.

  The showcase according to the present invention is provided with the filter cleaning device for a heat exchanger of the showcase.

  According to this invention, since it was set as the structure which moves a brush apparatus within the range of the width | variety of a heat exchanger, it can arrange | position regardless of the width | variety of a showcase. In addition, since both the brush device and the filter are supported by the condenser, and the arrangement reference is made common, the positioning of the brush device with respect to the filter is easier than in the configuration with different arrangement reference, and the assembly work is facilitated. Can be achieved. Further, since the brush device is moved and the filter is not moved, the structure can be simplified as compared with the configuration in which both the brush device and the filter are moved.

It is a figure which shows an example of the showcase which concerns on Embodiment 1 of this invention, (a) Front view and (b) The figure which showed collectively the schematic longitudinal cross-sectional view. It is an expansion perspective view of the element arrange | positioned in the machine room of the showcase of FIG. It is a side view of the filter cleaning apparatus which concerns on Embodiment 1 of this invention, and its periphery structure. It is a top view of the drive part of FIG. It is a front view of the machine room provided with the filter cleaning apparatus which concerns on Embodiment 1 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted or simplified as appropriate. Moreover, the shape, size, arrangement, and the like of the configurations described in the drawings can be appropriately changed within the scope of the present invention. In addition, “up”, “down”, “left”, “right”, “front”, “rear”, “front”, and “back” used in the following description indicate the direction when the showcase is viewed from the front unless otherwise specified. I mean.

Embodiment 1 FIG.
FIG. 1 is a diagram showing an example of a showcase according to Embodiment 1 of the present invention, and is a diagram collectively showing (a) a front view and (b) a schematic longitudinal sectional view. 2 is an enlarged perspective view of elements arranged in the machine room of the showcase of FIG.
The showcase 1 cools or keeps heat in a state where products such as beverages are displayed, for example, and includes a showcase body 2 and a panel unit 10 disposed at a lower portion of the showcase body 2. . In addition, below, the case where the goods accommodated in the showcase main body 2 are cooled is illustrated.

  The showcase body 2 has a configuration including a heat insulating wall in a frame body, for example, and a storage 2A for storing a display object is formed. The showcase body 2 is a so-called open showcase in which an opening 2x for taking in and out a display object is formed on the front side. A plurality of display shelves 3 are arranged inside the showcase body 2, and each display shelf 3 is slidably installed in the front-rear direction (a direction orthogonal to the paper surface in FIG. 1A). When each display shelf 3 is replenished with display items, each display shelf 3 is pulled forward, and when the replenishment is completed, each display shelf 3 is accommodated in the storage 2A again. .

  A cool air circulation duct 4 for circulating cool air is formed on the bottom surface, back surface, and top surface of the showcase body 2, and a blower 24 and a cooler 25 are arranged in the cool air circulation duct 4. The blower 24 is installed on the bottom surface of the showcase body 2 and sucks the air in the storage 2A from the opening 2x side into the cold air circulation duct 4 on the bottom surface side through the suction port 4a, and circulates the cold air on the back side. The air is forcibly blown to the duct 4 side. The cooler 25 is installed in the cool air circulation duct 4 on the back side of the showcase body 2, and cools the air blown from the blower 24.

  The blower 24 forcibly blows air from the bottom side to the back side, and after the air is cooled in the cooler 25, the cooled air is sent into the cool air circulation duct 4 on the top side. Then, the cool air is sent from the outlet 4b into the storage 2A, and the cool air in the storage 2A is again sucked into the cool air circulation duct 4 on the bottom surface side by the blower 24. In this way, display items such as merchandise stored in the showcase body 2 are kept cooled (or kept warm).

  The panel unit 10 is provided in the lower part of the showcase body 2, and is formed in a box shape, for example. And in the space in the panel unit 10, the machine room 10A in which the mechanical elements etc. which comprise a refrigerating cycle are accommodated is formed. In addition, drainage for dropping drain water such as defrost water generated from the cooler 25 toward the drain water evaporator 30 in the machine room 10A is provided at the bottom of the cold air circulation duct 4 on the bottom side of the showcase body 2. A mouth 4c is provided.

  The front panel 11 of the panel unit 10 is formed with a suction port 11a for sucking outside air into the machine room 10A. The suction port 11a includes a plurality of through holes, and is formed in a region facing a condenser 22 described later. The suction port 11a may be any shape, position, and size as long as it sucks outside air into the machine room 10A.

  A refrigeration cycle in which a compressor 21, a condenser (radiator) 22, a decompression device (not shown), and an accumulator 23 are connected by a refrigerant pipe is accommodated in the machine room 10A. The above-described cooler (evaporator) 25 is connected between the decompression device and the accumulator 23 by a refrigerant pipe. Further, a blower 26 that blows air to the condenser 22 and a drain water evaporator 30 are disposed in the machine room 10A. When the blower 26 is operated, the wind sucked from the suction port 11a (see FIG. 1) flows in the order of the condenser 22 and the drain water evaporator 30. In addition, although the structure provided with 2 sets of the air blower 26, the condenser 22, and the drain water evaporation apparatus 30 was shown in FIG. 1, 1 set may be sufficient and more sets may be provided.

  Further, a heat exchanger filter cleaning device (hereinafter, abbreviated as a filter cleaning device), which is a characteristic part of the present invention, is disposed on the wind upstream side of the blower 26. In FIG. 1, the blower 26 is located on the wind upstream side of the condenser 22, but may be located on the wind downstream side of the condenser 22. Hereinafter, the filter cleaning device 40 will be described by taking as an example a configuration in which the blower 26 is arranged on the wind downstream side of the condenser 22 and the filter cleaning device 40 is arranged on the wind upstream side of the condenser 22.

FIG. 3 is a side view of the filter cleaning device and its peripheral structure according to Embodiment 1 of the present invention. FIG. 4 is a plan view of the drive unit of FIG. FIG. 5 is a front view of a machine room provided with the filter cleaning device according to Embodiment 1 of the present invention.
The filter cleaning device 40 is arranged to face the filter 41 that collects dust contained in the air, the brush device 42 that scrapes off dust adhering to the filter 41, and the brush device 42 to move. The drive part 43 and the rail 44 etc. which guide the movement of the brush apparatus 42 are provided.

  The filter 41 is disposed between the suction port 11 a of the front panel 11 and the condenser 22 so as to cover the entire surface of the condenser 22. A filter holding member 52 having an L-shaped cross section is connected to each of the upper end and the lower end of the side plate 22 a of the condenser 22. 52a is formed. And the filter 41 is supported by the filter support part 52a formed in the front upper and lower sides of the condenser 22 up and down, and the filter 41 is arranged on the wind upstream side of the condenser 22.

  The brush device 42 includes a box-shaped brush body 45 having a space inside, and strip-shaped brush hairs 46 disposed on a surface of the brush body 45 facing the filter 41. The brush bristles 46 are arranged on the brush main body 45 by, for example, attaching a strip-shaped sheet in which a plurality of bristles are planted to the brush main body 45. Further, at the lower part of the brush body 45, a door wheel (roller) 47 is rotatably provided. The brush device 42 reciprocates within the range of the width of the condenser 22 in the direction orthogonal to the air flow direction (the left-right direction in FIG. 5) to scrape off dust adhering to the filter 41.

  The drive unit 43 includes a brush drive motor 48, a brush drive gear 49 fixed to the rotating shaft 48 a of the brush drive motor 48, and a pair of brush drive rack gears that mesh with the brush drive gear 49 and guide the movement of the brush drive gear 49. 50. The brush drive motor 48 is fixed above the brush body 45 so that the brush drive gear 49 is located outside the brush body 45, and the brush device 42 is integrated with the movement of the brush drive gear 49. It is configured to move. The pair of brush drive rack gears 50 are screwed to a connecting member 51 having an L-shaped cross section with a space therebetween, and the brush drive gear 49 is disposed between the pair of brush drive rack gears 50. The connecting member 51 is disposed so that a part of the connecting member 51 overlaps the upper surface of the filter holding member 52 disposed above the side plate 22a of the condenser 22, and the connecting member 51 and the filter holding member 52 are side by side. Screwed to the plate 22a.

  A rail 44 for guiding the brush device 42 is arranged at the lower front portion of the condenser 22. The rail 44 is screwed to the side plate 22 a of the condenser 22. The filter holding member 52 is also screwed together at the screwed portion between the rail 44 and the side plate 22a of the condenser 22. And the doorwheel 47 provided in the lower part of the brush apparatus 42 is arrange | positioned so that a movement on the rail 44 is possible.

  The filter cleaning device 40 further includes a limit switch 53 that detects that the brush device 42 is located at the moving end in the forward direction. When the brush device 42 presses the limit switch 53, a detection signal is output to a control board 54 described later, the rotation of the brush drive motor 48 is reversed, and the brush device 42 moves in the return direction. In this way, the brush device 42 reciprocates within the width range of the condenser 22 in the left-right direction (within the width range of the heat exchanger in the direction perpendicular to the air flow direction). Here, the limit switch 53 (mechanical switch) is used as the detecting means of the moving end of the brush device 42, but other types of detectors such as an optical type can also be used.

  A control box 55 is disposed in the machine room 10 </ b> A, and the control board 54 of the brush device 42 disposed in the control box 55 and the brush drive motor 48 are electrically connected by a wiring 57. The control box 55 is fixed to the upper surface of the panel unit 10 in consideration of wiring routing. The middle of the wiring 57 is supported by a wiring holding jig 56 fixed to the upper panel 12 of the panel unit 10 so as not to obstruct other components in the machine room 10A.

  In the showcase 1 having the filter cleaning device 40 configured as described above, air is sucked into the machine room 10A from the suction port 11a of the front panel 11 by operating the blower 26 during operation of the showcase 1. The dust in the air is captured by the filter 41. The showcase 1 periodically performs a defrost operation for defrosting frost adhering to the cooler 25, and stops the operation of the blower 26 during the defrost operation. Thus, the filter 41 is cleaned by the filter cleaning device 40 during the defrost operation in which the blower 26 is stopped. This control is performed by the control board 54. Note that the filter cleaning timing is not limited to that during the defrosting operation, and it is only necessary that the blower 26 is stopped.

Next, the operation of the filter cleaning device 40 will be described.
When the brush drive motor 48 is driven under the control of the control board 54, the brush drive gear 49 rotates, and the brush drive gear 49 meshes with the pair of brush drive rack gears 50 and moves laterally. As a result, the brush device 42 moves laterally along the rail 44 together with the brush drive gear 49. At this time, the brush bristles 46 provided on the brush main body 45 come into contact with the filter surface of the filter 41 and scrape off dust adhering to the filter 41.

  In this example, the brush device 42 takes the position of one end (left end in FIG. 5) of the condenser 22 close to the control box 55 as the initial position, and from the initial position to the other end (right end in FIG. 5). A reciprocating movement is made between the forward path moving toward the head and the return path returning to the initial position. In this reciprocating movement, when the brush device 42 moves in the forward direction and presses the limit switch 53, the rotation of the brush drive motor 48 is reversed, and the brush device 42 moves in the return direction to return to the original position, and the initial position. The operation stops at. The operation of the brush device 42 is not limited to reciprocal movement.

  As described above, the filter cleaning device 40 of the first embodiment is configured to move the brush device 42 within the range of the width of the condenser 22, so that it is difficult to apply the conventional filter moving filter cleaning device. It can also be applied to cases. That is, the filter cleaning device 40 applicable regardless of the width of the showcase body 2 can be obtained.

  In this example, the condenser 22 is disposed opposite to the front surface of the showcase 1 and air is sucked in from the front and blown to the condenser 22. However, depending on the showcase, There is also a configuration in which the condenser 22 is disposed oppositely, and air is sucked from the side surface and blown to the condenser 22. Since the showcase generally has a shorter length in the depth direction than the lateral length as viewed from the front, the showcase of the type that sucks air from the side and blows it to the condenser 22 has a filter moving range. It is difficult to apply the conventional filter cleaning device 40 that requires a large amount of water. However, the filter cleaning device 40 according to the first embodiment is applicable regardless of the orientation of the condenser 22 because the brush device 42 may be moved by the width of the condenser 22. In addition, for example, a showcase that warms a product generally has a shorter width than a showcase that cools a product, but the filter cleaning device of the first embodiment is also used in this type of showcase. 40 is applicable.

  Further, the brush device 42 needs to be installed so that the brush bristles 46 are in uniform contact with the filter surface of the filter 41. The brush device 42 is connected to and supported by the condenser 22 via a drive unit 43 and a rail 44, and the filter 41 is supported by a filter holding member 52 fixed to the side plate 22 a of the condenser 22. That is, both the brush device 42 and the filter 41 are configured to be supported by the condenser 22, and the arrangement position is determined based on the condenser 22. That is, the arrangement standard is common. For this reason, the brush device 42 and the filter 41 can be arranged without being affected by variations in the arrangement position of the condenser 22 in the machine room 10A. Therefore, adjustment of the brush position after assembling becomes simpler than in the prior art, the assembling work can be facilitated, and the manufacturing cost can be reduced.

  Further, in the first embodiment, since only the brush device 42 is moved and the filter 41 is not moved, the number of motors in the filter cleaning device 40 is one, and the device configuration can be simplified. Therefore, the number of parts can be reduced, and cost reduction and improvement in assembly can be expected. Further, since the brush device 42 has a simple structure in which the brush bristles 46 are attached to one side of the brush body 45, the filter cleaning is performed in comparison with the conventional configuration using a rotating brush corresponding to the configuration in which the brush is attached to the entire surface of the brush body. The depth dimension of the device can be reduced.

  In the first embodiment, the configuration in which the brush drive motor 48 is disposed on the upper portion of the brush body 45 and the door wheel 47 is disposed on the lower portion of the brush body 45 is shown. However, the arrangement may be reversed upside down. That is, a configuration may be adopted in which the door wheel 47 is disposed on the upper part of the brush body 45 and the brush drive motor 48 is disposed on the lower part of the brush body 45.

  In Embodiment 1, an example in which the present invention is applied to a showcase 1 that freezes or refrigerates merchandise is shown, but the present invention can also be applied to a showcase 1 that keeps merchandise warm. In this case, the present invention is used as a cleaning device for cleaning the evaporator filter.

  DESCRIPTION OF SYMBOLS 1 Showcase, 2 Showcase main body, 2A storage, 2x opening, 3 Display shelf, 4 Cooling air circulation duct, 4a Intake port, 4b Outlet, 4c Drainage port, 10 Panel unit, 10A Machine room, 11 Front panel, 11a Suction port, 12 Top panel, 21 Compressor, 22 Condenser, 22a Side plate, 23 Accumulator, 24 Blower, 25 Cooler, 26 Blower, 30 Drain water evaporation device, 40 Filter cleaning device, 41 Filter, 42 Brush device, 43 drive unit, 44 rail, 45 brush body, 46 brush bristles, 47 door pulley, 48 brush drive motor, 48a rotating shaft, 49 brush drive gear, 50 brush drive rack gear, 51 connecting member, 52 filter holding member, 52a filter support unit , 53 Limit switch, 54 Control board, 55 control box, 56 wiring holding jig, 57 wiring.

Claims (5)

A filter that is supported by the heat exchanger of the showcase and is arranged on the air upstream side of the heat exchanger, and that collects dust in the air;
A brush device that moves within the width of the heat exchanger in a direction orthogonal to the air flow direction;
A drive unit connected to the heat exchanger for moving the brush device;
A rail connected to the heat exchanger and guiding the movement of the brush device;
The brush device includes a brush main body and brush bristles provided on a surface of the brush main body facing the filter, and the brush bristles while moving within the range along the rail by the driving unit. Filter cleaning device for showcase heat exchanger that scrapes dust adhering to the filter. The drive unit is disposed in a space formed in the brush body and fixed to a brush drive motor fixed to the brush body, and a rotation shaft of the brush drive motor protruding outward from the brush body, A brush drive gear that rotates integrally with a rotating shaft, and a pair of brush drives that are fixed to a connecting member that is connected to the heat exchanger and that engage with the brush drive gear sandwiched therebetween to guide the movement of the brush drive gear With rack gear,
The brush device moves along the rail integrally with the brush drive gear as the brush drive motor rotates and the brush drive gear meshes with and moves with a pair of brush drive rack gears. 2. A filter cleaning device for a heat exchanger of a showcase according to 1.   The filter cleaning device for a heat exchanger of a showcase according to claim 1 or 2, wherein a door wheel that moves along the rail is rotatably provided in the brush body of the brush device.   The filter cleaning apparatus for a heat exchanger of a showcase according to any one of claims 1 to 3, further comprising a control board that drives the drive unit during a defrost operation of the showcase.   The showcase provided with the filter cleaning apparatus for heat exchangers of the showcase as described in any one of Claims 1-4.

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