JPH1019450A - Cooling storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase an ability to evaporate drain water in a vapor pan, wherein a circulating pump is provided for sucking the drain water from the lowermost-staged vapor pan and discharging the drain water into the uppermost- staged vapor pan while a drain pipe is provided for discharging the drain water accumulated in the uppermost-staged vapor pan into the vapor pan which is located right below the uppermost-staged vapor pan. SOLUTION: A lowermost-staged vapor pan 16 is provided with a partition 26 which defines a settling tank 31 and a suction tank 32 in the pan 16. Drain water flows in the settling tank 31 from the central portion of an intermediately- staged vapor pan 16 which is located directly above the lowermost-staged pan 16 through a discharge pipe 24. The suction tank 32 is provided with a circulating pump 34 which, in turn, is connected with a suction pipe 36. The circulating pump 34 sucks and supplies the drain water to an uppermost-staged vapor pan 16 through this suction pipe 36. Due to such a construction, the drain water is prevented from being not uniformly accumulated in all vapor pans 16 or being present in a specific vapor pan 16 so that the evaporating efficiency is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling storage such as a refrigerator-freezer showcase or a refrigerator provided with an evaporating dish into which drain water from a storage room or a cooler flows.

[0002]

2. Description of the Related Art Conventionally, this type of cooling storage is described in, for example, Japanese Utility Model Publication No. 59-2461 (F25D21 / 14). Such a cooling storage has a structure as shown in FIG. 7A and 7B are explanatory views of a machine room of a conventional cooling storage, wherein FIG. 7A is a plan view and FIG. 7B is a front view in a state where a front panel is removed.

[0003] In the machine room 01 of the cooling storage, a condenser 0 is provided.
2. The condenser blower 03 and the compressor 04 are arranged, and when the condenser blower 03 operates, air is blown from the near side to the back side to cool the condenser 02 and the compressor 04 by air. And beside the condenser 02 and the compressor 04,
An evaporating dish 07 and a drain dish 08 are arranged.

In the evaporating dish 07, drain water such as defrost water from a cooler that cools the storage room of the cooling storage and dew water generated in the storage room flows in and is stored. A pipe 010 from the compressor 04 to the condenser 02 is provided in the evaporating dish 07 in order to promote the evaporation of the drain water stored in the evaporating dish 07. This pipe 01
At 0, high-pressure and high-temperature refrigerant discharged from the compressor 04 flows, and the high-temperature refrigerant heats the drain water stored in the evaporating dish 07 to promote evaporation.
The heating pipe 010 is connected to an evaporating dish
7 is fixed.

When a large amount of drain water accumulates in the evaporating dish 07, it is drained to a drain dish 08 through an overflow pipe (not shown). Drain water is drainage tray 08
, The drain tray 08 is removed from the machine room 01 and discarded.

[0006]

By the way, when the temperature is high and humid in summer or the like, a large amount of drain water flows into the evaporating tray 07 and flows into the drain tray 08 through the overflow pipe. Therefore, it is necessary to manually drain the drain water accumulated in the drain tray 08 once or twice a day, which is troublesome.

[0007] In order to increase the amount of evaporation in the evaporating dish 07, some evaporating dishes 07 are provided in multiple stages. However, since the drain water overflowed in the upper evaporating dish 07 is dropped to the lower evaporating dish 07, the amount of drain water accumulated in each evaporating dish 07 becomes uneven, and the upper evaporating dish 07 becomes uneven. In 07, the drain water may be full, and there may be no drain water in the lower evaporating dish 07. Conversely, drain water may not be present in the upper evaporating dish 07, and drain water may be filled in the lower evaporating dish 07. In this way, if the drain water does not reach each evaporating dish 07, the evaporation area decreases,
Evaporation efficiency decreases.

[0008] Further, the evaporating dish 07 is hit by air and the drain water evaporates vigorously. At the time of the evaporation, heat of vaporization is taken away and the temperature of the drain water is low, or the condenser 02 or the heater for heating is used. A place near the pipe 010 where the temperature of the drain water is high occurs. Therefore, the temperature distribution of the drain water becomes uneven, and the evaporation efficiency of the entire evaporation dish 07 may be reduced.

Further, the heating pipe 010 is connected to the evaporating dish 07.
If the piping is connected to the evaporating dish 07 and the heating pipe 010
Dust and the like are easily clogged in the gap between them, and this dust reduces the heat transfer efficiency and makes the cleaning work difficult. Further, the heating pipe 010 is disposed above the bottom of the evaporating dish 07. However, when the level of the drain water accumulated in the evaporating dish 07 becomes low, the heating pipe in contact with the drain water is provided. The surface area of the pipe 010 decreases, and the evaporation efficiency of drain water decreases.

[0010] The present invention has been made to solve the above-described problems, and has as its object to provide a cooling storage having a high ability to evaporate drain water from an evaporating dish.

[0011]

The cooling storage (1) of the present invention comprises a multistage evaporating dish (16) into which drain water flows.
And a circulation pump (34) for sucking drain water from the lowermost evaporating dish and draining the drainwater to the uppermost evaporating dish. The evaporating dish is provided with a drain pipe (24) for draining the accumulated drain water to the immediately lower evaporating dish.

The lowermost evaporating dish has a partition plate (26) divided into a suction tank (32) and a sedimentation tank (31).
Is provided, drain water from the evaporating dish of the immediately upper stage flows into the settling tank, and the drain water accumulated in the settling tank overflows from the partition plate and flows into the suction tank. In some cases, the circulating pump is drawing up the drain water accumulated in the suction tank.

Further, in the machine room (7), an evaporating dish into which drain water flows, a condenser (11), and a compressor (13) for discharging a refrigerant to the condenser are arranged. The evaporating dish has a double structure with a cavity (16c) inside, and a refrigerant inlet (2) through which the refrigerant flows into the cavity.
1) and a refrigerant outlet (2
2) are formed. A pipe from the compressor is connected to the refrigerant inlet of the evaporating dish, and a pipe to the condenser is connected to the refrigerant outlet of the evaporating dish, so that the refrigerant discharged from the compressor evaporates. It may flow into the condenser through the dish.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of a cooling storage according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a cooling storage according to the present invention.
2A and 2B are explanatory views of the machine room in FIG. 1, wherein FIG.
(B) is a front view in the state where the front panel was removed. FIG. 3 is a side view of the evaporating dish and the drain dish. FIG. 4 is an enlarged view of a main part of the lowermost evaporating dish. FIG. 5 is a sectional view of the evaporating dish.

A display room 4 as a storage room having a plurality of display shelves 3 is disposed above the refrigerated open showcase 1 as a cooling storage, and a machine room 7 is disposed below the display room 4. Have been. The front opening of this machine room 7
It is openably and closably covered by a front panel 8. A gap is formed between the lower end of the front panel 8 and the machine room 7, and air can flow into the machine room 7 from this gap.

Inside the machine room 7, a condenser 11, a condenser blower 12 and a compressor 13 are provided on the right side in this order from the near side, while an evaporating plate 16 and a drainage plate 17 are provided on the left side. Is provided. The evaporating dishes 16 are provided in multiple stages (three stages in this embodiment) in the vertical direction and supported by columns 18. Top stage evaporating dish 16
And an evaporating dish 16 at the center is an outer dish 16 constituting an outer surface.
a and the inner plate 16b forming the inner surface are connected at a distance, and have a double structure.
6b is formed with the cavity 16c.

A refrigerant inlet 2 through which the refrigerant flows into the cavity 16c is provided at the innermost part of the uppermost evaporating dish 16.
1 is formed, while a refrigerant outlet 22 through which the refrigerant flows out of the cavity 16 c is provided in a portion on the near side of the uppermost evaporating dish 16.
Are formed. The evaporating plate 16 at the center, which is the stage immediately below the evaporating plate 16 at the top, has a refrigerant outlet 22 at the back side and a refrigerant inlet 21 at the front side. The refrigerant inlet 21 of the evaporating dish 16 at the center is
The refrigerant outlet 22 of the uppermost evaporating dish 16 which is the immediately upper stage
Are connected by a U-shaped pipe 23. A drain pipe 24 penetrating through the evaporating dish 16 is provided at a portion on the near side of the uppermost evaporating dish 16, and the drain pipe 24 drains drain water accumulated in the evaporating dish 16 downward. I have. Then, in the evaporating dish 16 in the center, which is the stage immediately below, the drainage pipe 24 is provided in a part on the back side,
The drain pipes 24 are staggered with their upper ends opened at positions near the bottom surface higher than the bottom surface of each inner plate 16b.

The lowermost evaporating dish 16 does not have a double structure, and has no cavity 16c formed therein. The lowermost evaporating dish 16 is provided with a partition plate 26 as shown in FIG.
And a suction tank 32. This partition plate 26
The upper end is formed lower than the upper end of the drain pipe 24 as shown in FIG. Drain water flows into the sedimentation tank 31 from the drain pipe 24 of the evaporating dish 16 at the center, which is the upper stage. On the other hand, a suction pump 32 is provided with a circulation pump 34, and a pumping pipe 36 is connected to the circulation pump 34. The circulation pump 34 is connected to the uppermost evaporating dish 16 via the pumping pipe 36. Pumping drain water. The suction tank 32 is provided with a liquid level gauge 38,
The circulation pump 34 is connected to a power supply line (not shown) via the liquid level gauge 38. The drain tray 17 is arranged below the lowermost evaporating tray 16. Above the uppermost evaporating dish 16, a drain pipe 41 from which drain water such as dew condensation water in the display room 4 and defrost water in the cooler is discharged is disposed.

The blower 12 for the condenser is shown in FIG.
As shown in FIG. 3, air is sucked in from the gap at the lower end of the front panel 8 and is discharged from the rear surface of the machine room 7, and the condenser 11 and the compressor 13 are air-cooled. This condenser 1
The compressor 1 and the compressor 13 constitute a refrigeration cycle together with a cooler (not shown) for cooling the display room 4. That is, the outlet of the cooler and the inlet 13a of the compressor 13
The outlet 13b of the compressor 13 is connected to the refrigerant inlet 21 of the uppermost evaporating dish 16 by a pipe. The refrigerant outlet 22 of the evaporating dish 16 at the center is connected to the inlet 11 a of the condenser 11. The outlet 11b of the condenser 11 is connected to the inlet of the cooler via a capillary tube (not shown) or the like.

Then, when the refrigeration cycle operates, the compressor 13 sucks the gaseous refrigerant returned from the cooler,
This refrigerant is compressed into a high-temperature and high-pressure refrigerant of about 70 ° C. to 80 ° C. and discharged from the discharge port 13b. The high-temperature and high-pressure refrigerant flows into the cavity 16 c of the evaporating dish 16 from the refrigerant inlet 21 of the uppermost evaporating dish 16, and flows to the refrigerant outlet 22 while heating the uppermost evaporating dish 16. Then, the refrigerant that has flowed out of the refrigerant outlet 22 flows into the cavity 16c of the evaporating dish 16 in the center through the U-shaped pipe 23, and heats the evaporating dish 16 in the center. Next, the refrigerant flows out of the refrigerant outlet 22 and flows into the condenser 11. The refrigerant is air-cooled in this condenser 11 and its temperature is reduced.
It flows into the cooler in a liquefied state via a capillary tube or the like. In this cooler, the refrigerant evaporates and takes away the surrounding heat, thereby cooling the display room 4. Then, the vaporized refrigerant is sucked into the compressor 13 again.

Drain water such as dew condensation water generated in the display room 4 and defrost water of a cooler passes through a drain pipe 41 and
It flows into the back side of the evaporating dish 16 at the top. The drain water that has flowed into the uppermost evaporating dish 16 flows toward the near side, and flows from the drain pipe 24 into the evaporating dish 16 at the center. In the evaporating dish 16 at the center, the drain water flows from the near side to the far side, and flows from the drain pipe 24 into the settling tank 31 of the lowermost evaporating dish 16. In the sedimentation tank 31, garbage and the like flowing together with the drain water are settled. Then, the sedimentation tank 31 is moved beyond the partition plate 26.
Plate 26 which is the water level flowing out from the suction tank 32
When the drainage water level in the sedimentation tank 31 exceeds the allowable flowing water level, ie, the upper end of the partition plate 26, the sedimentation tank 31
Of the supernatant liquid flows into the suction tank 32 over the partition plate 26. The liquid level in the suction tank 32 is measured by a liquid level meter 38. When the liquid level exceeds a predetermined value, that is, the set value of the liquid level meter 38, the circulating pump 34 is operated and the pumping pipe 36 is connected. The drain water is pumped to the evaporating dish 16 at the uppermost stage. In addition, suction tank 3
When the liquid level of No. 2 decreases and becomes lower than the lower set value of the liquid level meter 38, the circulation pump 34 stops. By the operation of the circulation pump 34, the drain water flowing from the drain pipe 41 is
While circulating through the multistage evaporating dishes 16, the uppermost and central evaporating dishes 16 have cavities 1 of the evaporating dishes 16.
It is heated by the high-temperature refrigerant flowing through 6c, and the evaporation of the drain water is promoted. Then, when the water level of the lowermost evaporating dish 16 exceeds the upper end, which is the overflow water level of the drain pipe 24, the drain water is drained to the drain dish 17. However, since the permissible water level of the partition plate 26, that is, the upper end of the partition plate 26 is lower than the overflow water level of the drain pipe 24, the lowermost evaporating dish 16 is usually used.
Is hardly drained from the drain pipe 24 to the drain tray 17.

Next, a second embodiment of the cooling storage according to the present invention will be described with reference to FIG. FIG. 6 is an enlarged sectional view of a main part of an evaporating dish according to the second embodiment. In addition,
In the description of the second embodiment, the same reference numerals are given to components corresponding to the components of the first embodiment, and a detailed description thereof will be omitted.

In the first embodiment described above, the double-layered evaporating dish 16 having the cavity 16c is provided in a total of two stages, the uppermost stage and the central stage, but this second stage is provided. In the embodiment described above, the evaporating dish 16 having the double structure is provided with
A total of three stages are provided. Although not shown in FIG. 6, below the third-stage evaporating dish 16 from the top, a single-layer evaporating dish 1 having no cavity 16c is formed.
6 are arranged.

As described above, in the embodiment, the inflow position of the drain water from the evaporating dish 16 in the immediately upper stage and the outflow position of the drain water into the evaporating dish 16 in the immediately lower stage are separated as much as possible. The drain pipe 24 of the evaporating dish 16 is disposed on the opposite side of the evaporating dish 16 of the immediately upper stage from the drain pipe 24, and the drain pipes 24 are arranged in a staggered manner. That is, when the drainage pipe 24 is disposed in front of the evaporating dish 16, the drainage pipe 24
Are arranged on the back side, and are alternately provided in a zigzag manner on the near side and the back side of the evaporating dish 16. Therefore, the drain water flows over the entire surface of the evaporating dish 16 from the near side to the far side of the evaporating dish 16 and from the far side to the near side, and the temperature distribution of the drain water becomes substantially uniform and cannot be heated. The amount of drain water remaining at a low temperature is reduced. as a result,
Evaporation is promoted throughout the drain water, and the evaporation efficiency is improved.

Further, a drainage dish 17 is provided below the lowermost evaporating dish 16, so that the multistage evaporating dish 16
Even when the drain water cannot be evaporated, the untreated drain water can be drained to the drain tray 17 through the drain pipe 24. The drain water collected in the drain tray 17 is manually discharged out of the machine room 7. Therefore, drain water overflows from the evaporating dish 16 and
The fouling of the machine room 7 is reduced.

The embodiments of the present invention have been described in detail above.
The present invention is not limited to the above embodiment,
Within the gist of the present invention described in the claims,
Various changes can be made. Modification examples of the present invention are exemplified below. (1) In the embodiment, the cooling storage is a refrigerated open showcase, but may be another cooling storage, for example, a freezer or a cooling storage provided with a heat insulating door.

(2) In the embodiment, the lowermost evaporating dish 16 has a single structure, but has a hollow structure as a double structure.
6c can also be formed. (3) In the embodiment, the number of the evaporating dishes 16 is three or four, but the number of evaporating dishes can be changed as appropriate.

(4) In the embodiment, the refrigerant discharged from the compressor flows into the condenser through a plurality of stages of evaporating dishes connected by a U-shaped pipe 23. It is also possible to flow into the condenser via only one stage of the evaporating dish without providing the pipe 23 of FIG.

[0029]

According to the present invention, there are provided a multi-stage evaporating dish into which drain water flows, and a circulation pump for sucking drain water from the lowermost evaporating dish and draining the drain water to the uppermost evaporating dish. The evaporating dish is provided with a drain pipe for draining the accumulated drain water to the evaporating dish in the stage immediately below. Therefore, the drain water that has flowed down to the bottom evaporating dish is
It is pumped to the top evaporating dish, passes through a drain pipe,
It falls down into the evaporating dish immediately below in order. As a result, the drain water flows through the evaporating dish, is less likely to stagnate and stay, the temperature distribution of the drain water becomes substantially uniform, the low-temperature drain water decreases, and the drain water can evaporate vigorously from the entire surface of the drain water. The evaporation efficiency is improved. In addition, since the drain water is circulating, the uneven distribution of the drain water in some of the evaporation dishes is reduced, and the evaporation efficiency is improved.

Further, the lowermost evaporating dish may be provided with a partition plate for dividing into a suction tank and a sedimentation tank. In this case, the garbage flowing together with the drain water settles in the settling tank, and clean drain water flows into the suction tank. Therefore, the circulating pump sucks less dust, and the circulating pump is less likely to break down.

Further, when the high-temperature refrigerant discharged from the compressor is flowing into the cavity inside the evaporating dish, the evaporating dish is not provided with a heating pipe, so that the volume of the evaporating dish is reduced. And the capacity of drain water increases. Also,
The drain water can flow smoothly without being obstructed by the piping. In addition, adhesion of dust and the like is reduced, and heat conduction efficiency is improved. Furthermore, even if the water level of the drain water drops, the drain water is in contact with the evaporating dish, and can be reliably heated by the refrigerant flowing inside the evaporating dish.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cooling storage according to the present invention.

FIGS. 2A and 2B are explanatory views of the machine room in FIG. 1, wherein FIG. 2A is a plan view and FIG. 2B is a front view in a state where a front panel is removed.

FIG. 3 is a side view of an evaporating dish and a drain dish.

FIG. 4 is an enlarged view of a main part of a lowermost evaporating dish.

FIG. 5 is a sectional view of an evaporating dish.

FIG. 6 is an enlarged sectional view of a main part of an evaporating dish according to a second embodiment.

FIG. 7 is an explanatory view of a machine room of a conventional cooling storage,
(A) is a top view, (b) is a front view in the state where the front panel was removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigeration open showcase (cooling storage) 4 Display room (storage room) 7 Machine room 11 Condenser 13 Compressor 16 Evaporating dish 16c Cavity 21 Refrigerant inlet 22 Refrigerant outlet 24 Drain pipe 26 Partition plate 31 Precipitation tank 32 Suction tank 34 Circulation pump

Claims (3)

[Claims] 1. A multi-stage evaporating dish into which drain water flows, a circulation pump for sucking up drain water from the lowermost evaporating dish and draining it to the uppermost evaporating dish are provided. A cooling pipe provided with a drain pipe for draining accumulated drain water to an evaporating dish located immediately below. 2. The lowermost evaporating dish is provided with a partition plate for dividing into a suction tank and a sedimentation tank. Drain water from the immediately upper evaporating dish flows into the sedimentation tank. The drainage water collected in the settling tank overflows from the partition plate and flows into the suction tank, and the drainage water collected in the suction tank is sucked up by the circulation pump. Cold storage. 3. A cooling storage having a machine room below a storage room, wherein the machine room includes an evaporating dish into which drain water flows, a condenser, and a compressor for discharging a refrigerant to the condenser. Is disposed, and the evaporating dish has a double structure with a hollow inside,
A refrigerant inlet through which the refrigerant flows into the cavity and a refrigerant outlet through which the refrigerant flows out from the cavity are formed, and a pipe from the compressor is connected to the refrigerant inlet of the evaporating dish. A cooling storage, wherein the refrigerant outlet of the dish is connected to a pipe to the condenser, and the refrigerant discharged from the compressor flows into the condenser via the evaporating dish.