JP2005274088A - Evaporating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaporating device for giving efficient evaporating treatment to drain water on each evaporation pan without particularly adding a heat source. <P>SOLUTION: The evaporating device 3 comprises the plurality of evaporation pans 25, 26, 27 installed up and down for evaporating drain water and a condensing fan 23 as a blower for blowing air to the evaporation pans 25, 26, 27. The evaporation pan installed on the upper side is arranged closer to the windward side of the condensing fan 23 more than the evaporation pan installed on the lower side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an evaporation apparatus for receiving and evaporating drain water such as a refrigerator and a low-temperature showcase.

  Conventionally, this type of evaporation apparatus is provided with an evaporating dish for receiving drain water of a cooler in a machine room under the main body of a refrigerator or the like, and a pipe for flowing a high-temperature refrigerant discharged from an electric heater or a compressor to the evaporating dish. It was set as the structure which evaporates drain water by providing and heating by these electric heaters or piping (refer patent document 1).

  In addition to the above embodiment, there is an evaporator 100 as shown in FIG. 4 as an evaporator for evaporating drain water (see Patent Document 2). Such an evaporation apparatus 100 is disposed, for example, in a machine room 101 of a low temperature showcase. A condenser 102 of a cooling device is provided in the machine room 101, and a condensing fan 103 as a blower is attached to the rear side of the condenser 102. An evaporator 100 is provided on the rear side of the condensing fan 103.

  The evaporator 100 is configured to include three evaporating dishes 104A, 104B, and 104C with a predetermined interval above and below. Each of the evaporating dishes 104A, 104B, and 104C is formed in a rectangular shape having a predetermined depth, and the evaporating dishes 104A and 104B located on the upper side are provided with overflow pipes 105A and 105B.

And the evaporating plate 107 was provided in each evaporating dish 104A, 104B and 104C, respectively. Thereby, drain water discharged from the cooling chamber above the machine chamber 101 via the drain pipe 108 is received in the uppermost evaporating dish 104A. The drain water received in the evaporating dish 104 </ b> A is heated by the condenser 102 and partially evaporated by the circulation of air supplied by the condensing fan 103. The drain water that cannot be evaporated in the uppermost evaporating dish 104A is received by the middle evaporating dish 104B via the overflow pipe 105A, and is heated by the condenser 102 in the same manner as the uppermost evaporating dish 104A. Part of the evaporation process is performed by circulation of air supplied by the condensing fan 103. Further, the drain water that cannot be evaporated in the evaporating dish 104B is received by the lowermost evaporating dish 104C via the overflow pipe 105B, and is similarly heated by the condenser 102 and supplied by the condensing fan 103. Evaporation process is performed by circulation of
Japanese Patent Publication No. 52-22711 JP-A-8-94238

  However, in the conventional evaporator 100, the evaporating dishes 104A, 104B, and 104C are arranged in such a manner that the evaporating dishes having substantially the same dimensions are stacked vertically without shifting back and forth. However, the size of the gap between the evaporating dishes is limited. As a result, the circulating air enters each evaporating dish from a limited narrow entrance opening, so that the static pressure rises on each evaporating dish and turbulent flow is generated on the outlet side of the evaporating dish.

  For this reason, the flow rate of air flowing over each evaporating dish is reduced, resulting in a loss of air volume. This loss of air volume causes a reduction in the evaporation capacity of each evaporating dish. Thus, it is conceivable to improve the evaporation capacity by providing a heat source such as a heater in each evaporating dish. However, in the market, it is not desired to improve the evaporation capacity by adding a heat source. Therefore, the improvement of the evaporation capability by methods other than the heat source addition is required.

  The evaporation apparatus of the present invention is provided with a plurality of evaporating dishes at the top and bottom to evaporate the waste water. The evaporating apparatus includes a blower for blowing air to each evaporating dish, and the evaporating dish installed on the upper side is installed on the lower side. It arrange | positions to the windward side of the ventilation by an air blower rather than an evaporating dish.

  According to a second aspect of the present invention, there is provided an evaporator according to the above invention, wherein an evaporating cloth is provided in each evaporating dish.

  According to a third aspect of the present invention, there is provided an evaporator according to the above invention, wherein the evaporating cloth is a wind direction plate for blowing air by a blower.

  According to a fourth aspect of the present invention, there is provided the evaporator according to the second or third aspect, wherein the evaporating cloth is brought into contact with or close to a wall surface of a device through which air blown by a blower circulates.

  The evaporation apparatus of the present invention is provided with a plurality of evaporating dishes at the top and bottom to evaporate the waste water. The evaporating apparatus includes a blower for blowing air to each evaporating dish, and the evaporating dish installed on the upper side is installed on the lower side. Since it arrange | positions on the windward side of the ventilation by an air blower rather than an evaporating dish, the frontage of the wind which approachs each evaporating dish can be expanded now.

  Thereby, the static pressure rise of the wind which approachs each evaporating dish can be suppressed, and the loss of the air volume by the said static pressure rise can be reduced. Therefore, a laminar flow can be formed on the wind outlet side of each evaporating dish, and the occurrence of turbulent flow can be prevented. As a result, an increase in the amount of air flowing through the drainage in each evaporating dish can be realized, and the evaporating capacity can be improved.

  Moreover, by providing the evaporating cloth in each evaporating dish as in the invention of claim 2, the waste water in each evaporating dish can be permeated into the evaporating cloth and dissipated to further improve the evaporating capacity. Can be planned.

  Furthermore, by using the evaporating cloth as a wind direction plate for blowing air by a blower as in the invention of claim 3, the evaporating cloth can be used as the air direction plate without providing a separate air direction plate, so that ventilation on the evaporating dish can be performed more smoothly. It becomes possible to become. Therefore, the number of parts can be reduced, and a rise in cost can be suppressed.

  Moreover, the temperature rise of the wall surface of an apparatus is suppressed by the endothermic effect by evaporation of waste water by making an evaporating cloth contact or approach the wall surface of the apparatus through which the air blown by a blower circulates as in the invention of claim 4. Will be able to.

  Therefore, the present invention has been made to solve the conventional technical problems, and provides an evaporation apparatus capable of efficiently evaporating drain water on each evaporation dish. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a low-temperature showcase 1 as an embodiment to which the present invention is applied, FIG. 2 is a longitudinal side view of the low-temperature showcase 1, and FIG. 3 is a partial enlarged side sectional view of the machine room 2.

  The low-temperature showcase 1 according to the present embodiment includes a heat insulating wall 6 having a substantially U-shaped cross section that constitutes a main body, and side plates 7 and 7 attached to both sides of the heat insulating wall 6. A partition plate 4 is attached to the inside of the heat insulating wall 6 serving as a main body with a space therebetween, and a duct 5 is defined between the partition plate 4 and the heat insulating wall 6.

  A bottom plate 10 is attached in front of the lower end of the partition plate 4 with a gap for a duct between the bottom wall 6A of the heat insulating wall 6 and a storage chamber 8 is defined inside the partition plate 4 and the bottom plate 10. Forming. A drain receiving portion D is formed on the upper surface of the bottom wall 6A, and the drain receiving portion D communicates with a machine room 2 described later by a drain pipe 11. A discharge port 14 provided with a honeycomb material 13 is formed at the upper edge of the front opening 12 of the heat insulating wall 6, and the discharge port 14 communicates with the duct 5. A suction port 15 is formed at the lower edge of the opening 12.

  On the other hand, a fan case 17 is installed on the bottom wall 6 </ b> A of the heat insulating wall 6 below the bottom plate 10, and a fan 18 is attached to the fan case 17. In addition, a cooler 19 of a cooling device is vertically installed in the duct 5 behind the partition plate 4, and when the blower 18 is operated, the cold air exchanged heat with the cooler 19 is raised in the duct 5 and discharged. It is discharged from the outlet 14 toward the suction port 15. Then, the cold air sucked from the suction port 15 is accelerated by the blower 18 again. As a result, a cold air curtain is formed in the opening 12, and a part of the cold air curtain is circulated into the storage chamber 8 to cool the interior of the storage chamber 8.

  In the storage chamber 8, a plurality of shelves 9... For displaying merchandise are installed vertically, and a fluorescent lamp (not shown) is attached to the front of the lower surface of each shelf 9. Further, a machine room 2 is formed on the base 21 below the bottom wall 6 </ b> A of the heat insulating wall 6. In the machine room 2, a condenser 22 of a cooling device is installed on the base 21 at the front side of one side, and a condensing fan 23 as a blower is attached to the rear side thereof. The evaporator 3 of the present invention is installed on the base 21 behind the condensing fan 23, and a compressor (not shown) of a cooling device is installed on the base 21 on the other side in the machine room 2. In this compressor, a condenser 22, an expansion valve (not shown), and a cooler 19 are connected in an annular shape by a refrigerant pipe (not shown) to form a so-called refrigeration cycle.

  In addition, a back panel 31 is attached to the outside of the heat insulating wall 6 serving as a main body across the back end of the base 21 from the rear end of the base 21 to the upper end of the heat insulating wall 6, and between the back panel 31 and the heat insulating wall 6. The exhaust duct 32 is partitioned. Thereby, the machine room 2 is communicated with the upper part of the heat insulating wall 6 through the exhaust duct 32.

  On the other hand, the evaporator 3 includes a plurality of support columns (not shown) and three evaporation trays 25, 26, and 27 held by the support columns at a predetermined interval in the vertical direction. Each evaporating dish 25, 26, 27 has a predetermined depth and is rectangular.

  In the present embodiment, each evaporating dish 25, 26, 27 is arranged so that the evaporating dish installed on the upper side is on the windward side of the ventilation fan 23 from the evaporating dish installed on the lower side, that is, Each evaporating dish 25 is arranged such that the uppermost evaporating dish 25 is closer to the condensing fan 23 than the middle evaporating dish 26, and the middle evaporating dish 26 is closer to the condensing fan 23 than the lowermost evaporating dish 27. The mounting positions of 25, 26 and 27 are shifted. In FIG. 3, since the positional relationship between the evaporating dishes 25, 26, and 27 of the evaporating apparatus 3 is illustrated in an enlarged manner, the shape of the bottom wall 6 </ b> A of the heat insulating wall 6 is simplified to a flat shape. Each of the evaporating dishes 25, 26, and 27 has a box shape, the size of the condenser 22 is reduced, and the motor of the condensing fan motor 23 is omitted.

  Further, in each of the evaporating dishes 25, 26, 27, there are provided evaporating plates 30 through which drain water permeates and easily diffuses from the surface. In this embodiment, Universex (trade name) is used as an example of the evaporation plate 30. This is a non-woven fabric such as polyester fiber as a base material, and fine phenol is thermally cured on this base material as a fixing agent. Further, it was dried after soaking in an alcohol solvent after imparting hydrophilicity.

  Further, in the present embodiment, the air blown by the front condensing fan 23 is directed at the rear part of each evaporating dish 25, 26, 27 to the exhaust duct 32 formed behind the heat insulating wall 6. Evaporating plates (evaporating cloth) 35, 36, and 37 that serve as wind direction plates are provided. The evaporating plates 35, 36, and 37 are also made of a non-woven fabric such as Universex (trade name) in the same manner as the evaporating plate 30.

  In particular, the evaporating plate 37 provided in the lowermost evaporating dish 27 supplies the air that has passed over the evaporating plate 27 to the exhaust duct 32 more effectively, so that the air blown by the condensing fan 23 circulates. The back surface is formed high along the back panel 31 and is provided close to the back panel 31. In addition to this, the evaporation plate 37 may be provided in contact with the back panel 31.

  In addition, overflow pipes 38 and 39 are attached to the evaporating dishes other than the evaporating dish 27 constituting the lowest stage, that is, the evaporating dishes 25 and 26, at positions that do not overlap each other in the vertical direction.

  With the above configuration, when the defrosting operation of the cooler 19 is performed by a control device (not shown), the drain water generated by the defrosting is collected in the drain receiving portion D of the heat insulating wall 6 and flows down from the drain pipe 11. Then, it is received in the uppermost evaporating dish 25 of the evaporating apparatus 3. The drain water that has flowed into the evaporating dish 25 is provided with the evaporating plate 30 on the evaporating dish 25, so that the drain water in the evaporating dish 25 is sucked up and diffused from the surface by the capillary phenomenon of the evaporating plate 30. Then, it is evaporated. From the front of the evaporating dish 25, air heated by the waste heat of the condenser 22 is blown by the condensing fan 23 and passes through the evaporating dish 25, so that drain water on the evaporating dish 25 is drained. Evaporation process.

  Then, when the drain water flowing down from the drain pipe 11 flows over the evaporating capacity of the evaporating dish 25 and the water level of the drain water in the evaporating dish 25 rises and reaches the upper end of the overflow pipe 38, the drain water is It flows in from the upper end of the overflow pipe 38 and overflows to the middle evaporating dish 26 located below.

  The drain water that has flowed into the evaporating dish 26 is also provided with an evaporating plate 30 in the evaporating dish 26, so that the drain water in the evaporating dish 26 is sucked up by the capillary phenomenon of the evaporating plate 30 and diffused from the surface. Thus, the evaporation process is performed. From the front of the evaporating dish 26, air heated by the waste heat of the condenser 22 is blown by the condensing fan 23 and passes through the evaporating dish 26, so that drain water on the evaporating dish 26 is drained. Evaporation process.

  Then, when the drain water flowing down from the overflow pipe 38 flows over the evaporating capacity of the evaporating dish 26 and the water level in the evaporating dish 26 rises and reaches the upper end of the overflow pipe 39, the drain water is It flows in from the upper end of the overflow pipe 39 and is received by the lowermost evaporating dish 27 located below.

  The drain water that has flowed into the evaporating dish 27 is similarly provided with an evaporating plate 30 in the evaporating dish 27, so that the drain water in the evaporating dish 27 is sucked up by the capillary phenomenon of the evaporating plate 30 and diffused from the surface. Thus, the evaporation process is performed. From the front of the evaporating dish 27, air heated by the waste heat of the condenser 22 is blown by the condensing fan 23 and passes through the evaporating dish 27, so that drain water on the evaporating dish 27 is drained. Evaporation process.

  Here, in this embodiment, the evaporating dishes 25, 26, and 27 are arranged so that the evaporating dish installed on the upper side is on the windward side of the ventilation by the condensing fan 23 than the evaporating dish installed on the lower side. Since the mounting positions are shifted, the frontage of the wind entering each of the evaporating dishes 25, 26, 27 is widened. Therefore, it can suppress that the static pressure of the wind which arises between each evaporating dishes 25, 26, and 27 rises, and it can reduce the loss of the air volume which passes on each evaporating dishes 25, 26, and 27. become.

  Therefore, since a laminar flow can be formed on the wind outlet side of each evaporating dish 25, 26, 27, the occurrence of turbulent flow can be prevented. Thereby, the increase of the airflow which flows on the waste_water | drain in each evaporating dish 25,26,27 can be aimed at, and the improvement of evaporation capability can be implement | achieved.

  In this embodiment, the evaporating plates 35, 36, and 37 play the role of a wind direction plate that directs the air on the evaporating tray to the exhaust duct 32 at the wind outlet side of each of the evaporating plates 25, 26, and 27. Therefore, the ventilation on the evaporating dish can be further smoothed, and the evaporation ability can be improved. In particular, in this embodiment, since the evaporation plates 35, 36, and 37 serve as a wind direction plate, it is not necessary to provide a separate wind direction plate, and the number of components can be reduced. In the evaporation plates 35, 36, and 37, similarly to the evaporation plate 30, the evaporation process can be promoted by sucking up the drain water in the evaporation dish by capillary action and diffusing from the surface.

  Furthermore, in this embodiment, the evaporation plate 37 provided in the lowermost evaporating dish 27 is formed so as to be higher upward along the back surface of the device through which the air blown by the condensing fan 23 circulates, that is, along the back panel 31. Since the back panel 31 is provided close to or in contact with the back panel 31, the back surface of the evaporation plate 37 is likely to rise in temperature due to the blowing of air including waste heat from the condenser 22 due to the endothermic action caused by the evaporation of the waste water. The panel 31 can be cooled. Therefore, since the temperature rise of the back panel 31 can be prevented, the influence on the periphery of the back panel 31 can be reduced without providing a special heat insulating material on the back panel 31. Thereby, the restriction | limiting of arrangement | positioning of the said showcase 1 for the reason for the temperature rise of the back panel 31 is lose | eliminated, and the convenience improves.

  Moreover, in the said Example, it is good also as adjustment of the attachment height of each evaporating dish 25,26,27 of the evaporator 3 being good. Thereby, the air volume which passes on each evaporating dish 25,26,27 can be adjusted, and the evaporation capability in each evaporating dish 25,26,27 can be adjusted.

  Moreover, since the evaporation apparatus 3 as described above does not insert an evaporation pipe or provide a heat source such as an electric heater, the apparatus can be simplified and made compact.

It is a perspective view of the low-temperature showcase as an Example to which this invention is applied. It is a vertical side view of a low-temperature showcase. It is a partial expanded side sectional view of a machine room. It is a partial expanded sectional view of the low-temperature showcase provided with the conventional evaporator.

Explanation of symbols

D Drain receiving part 1 Low temperature showcase 2 Machine room 3 Evaporator 6 Heat insulation wall 8 Storage room 11 Drain pipe 19 Cooler 22 Condenser 23 Condensing fan 25, 26, 27 Evaporating plate 30 Evaporating plate 31 Back panel 32 Exhaust duct 35, 36, 37 Evaporating plate 38, 39 Overflow pipe

Claims (4)

In an evaporator that installs multiple evaporating dishes at the top and bottom to evaporate the waste water,
An evaporating apparatus comprising a blower for blowing air to each evaporating dish, wherein the evaporating dish installed on the upper side is arranged on the windward side of the air blown by the blower rather than the evaporating dish installed on the lower side.   The evaporating apparatus according to claim 1, wherein evaporating cloth is provided in each evaporating dish.   The evaporator according to claim 2, wherein the evaporating cloth is a wind direction plate for blowing air from the blower.   The evaporating apparatus according to claim 2 or 3, wherein the evaporating cloth is brought into contact with or close to a wall surface of a device through which air blown by the blower circulates.

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