JPH1047838A - Refrigerating storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerating storage having a high drain water vaporizing ability. SOLUTION: A refrigerating storage 1 comprises a storage chamber 4 where goods are stored, a compressor 12 which compresses a refrigerant, a condenser which refrigerates the refrigerant discharged from the compressor 12, and a refrigerating cycle including a cooler 11 which cools the storage chamber 4 with the refrigerant fed from the condenser. The refrigerating storage 1 is further provided with a drain tank 27 which receives an inflow of drain generated in the storage chamber 4 and the cooler 11 and a pump 36 which discharges air in the drain tank 27 so as to reduce the inner pressure of the drain tank 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage such as a refrigerator display case or a refrigerator for treating drain water generated in a storage room or a cooler.

[0002]

2. Description of the Related Art Conventionally, a cooling storage of this type is described in, for example, Japanese Patent Publication No. 52-22711 (F25D21 / 14) and has a structure as shown in FIG.
4A and 4B are explanatory diagrams of a machine room of a conventional cooling storage, wherein FIG. 4A is a plan view, and FIG. 4B is a front view in a state where a front panel is removed.

[0003] In a machine room 01 of a cooling storage, a condenser 02 is arranged on the near side, a condenser blower 03 is arranged behind the condenser 02, and a compressor 04 is arranged behind the condenser. An evaporating dish 07 and a draining dish 08 are arranged on the side of the condenser 02 and the compressor 04. Drain water such as defrost water from the cooler that cools the storage room of the cooling storage or dew condensation water generated in the storage room flows into the evaporating dish 07,
It is stored. The accumulated drain water evaporates,
The air is blown out of the machine room 01 by being guided by the flow of the air blown by the condenser blower 03.

If the amount of drain water flowing into the evaporating dish 07 is larger than the amount of drain water evaporating from the evaporating dish 07, the drain water gradually accumulates in the evaporating dish 07, and finally the overflow pipe 014 and drain pan 0
Drained to 8. When drain water accumulates in the drain tray 08,
The drain tray 08 is removed from the machine room 01 and discarded as appropriate.

[0005]

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 dish 07, passes through the overflow pipe 014, and flows into the evaporating dish 07.
8 is flowing. Therefore, it is necessary to manually drain the drain water accumulated in the drain tray 08 once or twice a day, which is troublesome.

Accordingly, Japanese Utility Model Laid-Open Publication No. 1-175287 (F25D21 / 14) discloses an apparatus provided with a blower for drain water evaporation in order to increase the amount of drain water evaporated from an evaporating dish. ing. However, simply increasing the amount of air blown to the evaporating dish still reduces the drain water treatment capacity.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a cooling storage having a high ability to evaporate drain water.

[0008]

SUMMARY OF THE INVENTION A cooling storage (1) of the present invention has a storage room (4) for storing articles, a compressor (12) for compressing refrigerant, and a refrigerant discharged from the compressor. There is provided a condenser (15) for cooling, and a refrigeration cycle including a cooler (11) for cooling the storage chamber with the refrigerant flowing from the condenser. In order to achieve the above object, a drain water tank (27) into which the drain water generated in the cooler flows, and a pump (36) for discharging the air in the drain water tank to reduce the pressure in the drain water tank (36) ).

[0009] Also, a refrigerant pipe (1) from the compressor to the condenser.
4) may be provided in the drain water tank.

Further, the drainage pipe may be provided with a drain pipe (26) for guiding drain water generated in the cooler into the drain water tank, and an outside air inlet (32) provided in the drain pipe. The outside air that has entered the drain water tank from the outside air inlet through a drain pipe is discharged by the pump after passing through the drain water stored in the drain water tank.

An outlet (33) of a drain pipe for discharging the outside air flowing from the outside air inlet into the drain water tank.
May be formed over substantially the entire bottom surface of the drain water tank.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an 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. FIG. 2 is an explanatory diagram of the drain water treatment device disposed in the machine room of FIG. FIG. 3 is a refrigerant circuit diagram of a refrigeration cycle of the cooling storage of FIG. In FIG. 2, the arrangement of the compressor and the pump is shown shifted for easy understanding.

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.

The cooler 11 for cooling the display room 4 includes:
The refrigeration cycle shown in FIG. 3 is configured. In FIG. 3, the rotary compressor 12 compresses a gaseous refrigerant and converts the gaseous refrigerant into a high-temperature high-pressure refrigerant of about 70 ° C. to 80 ° C. and discharges it from the discharge port 12a. The high-temperature and high-pressure refrigerant flows through the heating pipe 14 and then flows into the condenser 15, where it is air-cooled and its temperature is reduced. Next, it flows into the cooler 11 in a liquefied state via the dryer 17 and the capillary tube 18. In the cooler 11, the refrigerant evaporates and takes away the surrounding heat, thereby cooling the surrounding air. The cooled air is supplied to a display room 4 by a blower 19 for a cooler (see FIG. 2).
The display room 4 is thus cooled by the cooler 1
Cooled at 1. The refrigerant vaporized in the cooler 11 is sucked into the compressor 12 again via the accumulator 21 and the check valve 22. Compressor 1
2. The heating pipe 14, the condenser 15, and the like are disposed in the machine room 7.

In FIG. 2, drain water such as defrost water of the cooler 11 and dew water of the display room 4 flows into the drain water inlet at the upper end of the drain pipe 26, is guided to the drain pipe 26, and is moved to the machine room. 7 into the drain water tank 27.
A U trap 31 is formed at an upper portion of the drain pipe 26, and the drain pipe 26 is vertically divided so that a gap as an outside air inlet 32 is formed at a joint. In addition, a lower portion of the drain pipe 26 is introduced into the drain water tank 27, and a discharge port 33 is formed at a distal end portion. The discharge port 33 has a number of discharge holes 34 and is formed over substantially the entire bottom surface of the drain water tank 27. Immediately above the discharge port 33, the above-described heating pipe 14, which is a refrigerant pipe, is provided in a meandering manner.

And an upper surface of the drain water tank 27;
The pump 36 is connected to a pump 37 by a pipe 37.
When the 6 operates, the air in the drain water tank 27 is sucked and discharged out of the drain water tank 27. Since the drain water tank 27 is sealed except for the pipe 37 and the discharge port 33, the pressure in the drain water tank 27 becomes low when the air in the drain water tank 27 is discharged by the pump 36. These heating pipe 14, drain pipe 26, drain water tank 2
The drain water treatment device is constituted by the pump 7 and the pump 36 and the like.

In the thus constructed showcase 1, when drain water such as defrost water of the cooler 11 and dew water of the display room 4 is generated, the drain water passes through the drain pipe 26 and is discharged from the outlet 33. The water flows into the drain water tank 27 from the discharge hole 34. Then, when drain water is accumulated in the drain water tank 27, a sensor (not shown) detects the level of the drain water that has risen, and operates the pump 36,
The pump 36 sucks air in the drain water tank 27 to reduce the pressure. When the pressure in the drain water tank 27 becomes low, the vaporization temperature, that is, the boiling point, of the accumulated drain water decreases, and the evaporation of the drain water is promoted. Further, when the air in the drain water tank 27 or the evaporated gaseous drain water is exhausted, the air in the machine room 7 is sucked from the outside air inlet 32 and the drain water tank is discharged from the discharge hole 34 of the discharge port 33. It is exhausted into 27. The air from the discharge hole 34 becomes bubbles and rises through the drain water.
The increase in the contact area between the air and the drain water due to the bubbles and the undulation of the drain water surface due to the bubbles promote the evaporation of the drain water. Further, the heating pipe 14 provided in the drain water tank 27 heats the drain water to further promote the evaporation. When the refrigerant in the heating pipe 14 heats the drain water, the high-temperature refrigerant in the heating pipe 14 is cooled by the drain water. In this manner, when the drain water in the drain water tank 27 evaporates and decreases, a sensor (not shown) detects the lowered drain water level, and the pump 36
To stop.

By the way, in summer, when the temperature is high, the refrigeration cycle needs to operate at full capacity, and the capacity of the condenser 15 may be limited. However, the condenser 15
In the summer months, when the capacity of the condenser 15 is often insufficient, a large amount of drain water is generated, and the drain water sufficiently cools the refrigerant in the heating pipe 14, so that the capacity of the condenser 15 may be insufficient. Decrease. On the other hand, in winter when the temperature is low, the generation of drain water is small,
It is rare that the refrigerant in the inside is cooled more than necessary by the drain water.

As described above, in the embodiment, since the heating pipe 14 is located above the discharge port 33, the air bubbles discharged from the discharge port 33 cause the heating pipe 1 to be heated.
Pass near 4. With this passage, a flow is generated in the drain water, and heat exchange between the heating pipe 14 and the drain water is efficiently performed. As a result, the evaporation of the drain water is promoted, and the cooling of the high-temperature refrigerant in the heating pipe 14 is also promoted.

An outside air inlet 32 is formed in the drain pipe 26 between a drain water inlet at the upper end and a discharge outlet 33 at the lower end, and the air in the machine room 7 is sucked from the outside air inlet 32. ing. Therefore, the outside air inlet 3
2 does not inhale the cooled air in the display room 4,
The cooling of the display room 4 is not hindered.

The embodiment of the present invention has been described above in detail.
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 discharge port 33 of the drain pipe 26 is provided on the bottom surface of the drain water tank 27, but may be lower than the level of the drain water stored in the drain water tank 27. For example, the arrangement of the outlets 33 can be appropriately changed. It is to be noted that, by disposing the discharge port 33 as close to the bottom of the drain water tank 27 as possible, it is possible to increase the moving amount of bubbles in the drain water, and accordingly, it is possible to increase the evaporation capacity. (3) In the embodiment, the outside air inlet 32 of the drain pipe 26 is formed at the joint of the vertically separated drain pipe 26, but a hole for the outside air is opened in the middle of the drain pipe 26. It is also possible to form an outside air inlet.

(4) In the embodiment, the drain water is heated by the heating pipe 14 from the compressor 12, but may be heated by another heater, for example, an electric heating sheath heater. (5) As long as at least the drain water generated in the cooler flows into the drain water tank, the drain water generated in another place, for example, a storage room or the like can flow.

[0024]

According to the present invention, since the air in the drain water tank into which the drain water generated in the cooler is flowing is discharged by the pump to reduce the pressure in the drain water tank, the boiling point of the drain water is reduced. And evaporation is accelerated. Then, the evaporated gaseous drain water is discharged by a pump and processed. Therefore, unlike the related art, it is not necessary to frequently drain the drain water of the drain tray, and the management of the cooling storage can be greatly simplified.

Also, refrigerant piping from the compressor to the condenser is
When disposed in the drain water tank, the high-temperature refrigerant in the refrigerant pipe heats the drain water to promote evaporation, and the high-temperature refrigerant is cooled, thereby improving the cooling capacity of the refrigeration cycle.

Further, if the outside air that has entered the drain water tank through the drain pipe from the outside air inlet is discharged by the pump after passing through the drain water stored in the drain water tank, the outside air is drained. When passing through the water,
It becomes bubbles. The bubbles increase the contact area between the drain water and the air, and the surface of the drain water is wavy, thereby promoting the evaporation of the drain water.

In the case where the outlet of the drain pipe for discharging the outside air flowing in from the outside air inlet into the drain water tank is formed substantially over the entire bottom surface of the drain water tank, the outlet is formed in the drain water tank. Is provided on the bottom surface, so that the moving distance of the bubbles, that is, the distance to the water surface of the drain water becomes longer, and the evaporation of the drain water is promoted. Moreover, since the discharge port is formed over substantially the entire bottom surface, a large number of bubbles can rise in the drain water, and the evaporation is further promoted.

[Brief description of the drawings]

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

FIG. 2 is an explanatory view of a drain water treatment device arranged in a machine room of FIG. 1;

FIG. 3 is a refrigerant circuit diagram of a refrigeration cycle of the cooling storage of FIG. 1;

FIG. 4 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) 11 Cooler 12 Compressor 14 Heating pipe (refrigerant pipe) 15 Condenser 26 Drain pipe 27 Drain water tank 32 External air inlet 33 Discharge port 36 Pump

Claims (4)

[Claims] 1. A storage room in which articles are stored, a compressor for compressing refrigerant, a condenser for cooling refrigerant discharged from the compressor, and a cooler for cooling the storage room with refrigerant flowing from the condenser. In a cooling storage provided with a refrigeration cycle comprising: a drain water tank into which the drain water generated by the cooler flows, and discharging the air in the drain water tank to reduce the pressure in the drain water tank to a low pressure. A cooling storage, comprising: 2. The cooling storage according to claim 1, wherein a refrigerant pipe from the compressor to the condenser is disposed in the drain water tank. 3. A drain water tank, a pump that discharges air from the drain water tank to reduce the pressure in the drain water tank, and a drain pipe that guides drain water generated by a cooler into the drain water tank. And an outside air inlet provided in the drain pipe, and the outside air that has entered the drain water tank through the drain pipe from the outside air inlet passes through the drain water stored in the drain water tank. A cooling storage, which is discharged by the pump afterwards. 4. A drain water tank, a pump that discharges air in the drain water tank to reduce the pressure in the drain water tank, and a drain pipe that guides drain water generated in a cooler into the drain water tank. The drain pipe is provided with an outside air inlet, and a discharge port for discharging outside air flowing from the outside air inlet into the drain water tank, and the drain of the drain pipe is provided with drain water. A cooling storage box formed substantially over the entire bottom surface of the tank.