JP2012087995A - Drain evaporator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase evaporation capability when a storage amount of drain water is increased.SOLUTION: The drain evaporator includes: an evaporation pan 40 storing drain water; an evaporation heater 50 heating the evaporation pan 40; an energization path 70 performing the energization so that the evaporation heater 50 generates heat; a bimetal thermo 60 capable of switching on/off the energization path 70 on the basis of a sensed temperature of the evaporation pan 40; and a float switch 65 detecting a level of the drain water in the evaporation pan 40 and closing a normally-open contact part 67 when the detected level is equal to or more than a set value. In the energization path 70, the bimetal thermo 60 is connected in series with the evaporation heater 50, and the contact part 67 of the float switch 65 is connected in parallel with the bimetal thermo 60. When the storage amount of the drain water is increased and the detected level of the float switch 65 becomes equal to or more than the set value, the evaporation heater 50 is continuously switched on irrespective of the temperature of the temperature of the drain water by closing the contact part 67, and the evaporation of the drain water is increased.

Description

  The present invention relates to a wastewater evaporation apparatus that accumulates wastewater such as defrosted water and evaporates and discharges it by heating.

Conventionally, what was described in patent document 1 is known as an example of this kind of waste_water | drain evaporation apparatus. This is provided with a box equipped with a heater at the bottom on the bottom of the cooling storage, an evaporating dish for storing drainage of defrost water etc. is housed in this box, and the heater is energized to generate heat. The waste water stored in the evaporating dish is heated to evaporate, and the steam is discharged out of the apparatus using air blown from a fan or the like.
Here, in this example, when heating the wastewater, a thermostat that indirectly detects the temperature of the wastewater in the evaporating dish is installed in the current path to the heater, and the heater is turned on and off within the defined temperature range of the wastewater. Control, in other words, keep the wastewater heated to a temperature just before boiling, and discharge steam little by little in a form that is close to nature, suppressing large amounts of steam from going to surrounding equipment and walls. Is intended to be.

JP-A-9-243234

In the above conventional apparatus, since the heater is controlled on and off regardless of the amount of drainage in the evaporating dish, for example, even if the amount of drainage increases suddenly, the heater will turn off if the temperature of the drainage rises to a predetermined level. Therefore, when the evaporation capacity is insufficient and the amount of evaporation, that is, the amount of decrease in drainage falls, there is a possibility of causing a situation where the evaporation tray overflows when the drainage flows again.
The present invention has been completed based on the above-described circumstances, and an object of the present invention is to promote evaporation capacity when the amount of stored wastewater increases.

  The drainage evaporator according to the present invention includes an evaporating dish for collecting waste water, a heater for heating the evaporating dish, an energizing path for energizing the heater to generate heat, and the energizing path based on a sensed temperature of the evaporating dish. And a water level sensor that detects a water level of the waste water in the evaporating dish and closes a normally-open contact point when the detected water level is equal to or higher than a set value. The thermostat is connected in series with a heater, and the contact portion of the water level sensor is connected in parallel with the thermostat.

As usual, as long as the detected water level of the wastewater is less than the set value and the storage amount is an appropriate amount, the heater is repeatedly turned on and off by the thermostat function, and the wastewater is evaporated by an appropriate amount. When the amount of stored wastewater increases and the detected water level exceeds the set value, the heater is continuously turned on regardless of the temperature of the wastewater by closing the contact portion of the water level sensor, and the evaporation of the wastewater is promoted. When the amount of stored wastewater decreases and the detected water level falls below the set value, the contact portion of the water level sensor is opened, and the heater on / off control by the thermostat is resumed.
When the amount of stored wastewater is normal, the evaporation capacity can be suppressed to ensure an appropriate amount of evaporation, but in the event of a sudden increase in storage volume, the heater is fully operated to promote the evaporation capacity, The amount of storage can be reduced.

  Also, an evaporating dish for collecting drainage, two heaters for heating the evaporating dish, an energizing path for energizing these heaters, and a thermostat capable of turning on and off the energizing path based on the sensed temperature of the evaporating dish And a water level sensor that detects a water level of the waste water in the evaporating dish and closes a normally-open contact point when the detected water level is equal to or higher than a set value. One series part in which the thermostat is connected in series and another series part in which the other heater and the contact part of the water level sensor are connected in series may be connected in parallel.

As usual, while the detected water level of the wastewater is less than the set value and the storage amount is a suitable amount, the water is evaporated by an appropriate amount while one heater is repeatedly turned on and off by the function of the thermostat. When the amount of wastewater storage increases and the detected water level exceeds the set value, the contact point of the water level sensor closes, and in addition to the operation of one heater, the other heaters are turned on continuously, Evaporation is promoted. When the amount of wastewater stored decreases and the detected water level falls below the set value, the contact portion of the water level sensor opens and the other heaters are turned off, and the process returns to one heater on / off control by the thermostat.
In normal times when the amount of stored wastewater is relatively small, the evaporation capacity can be suppressed to ensure an appropriate amount of evaporation, while in the event of a sudden increase in storage volume, the evaporation capacity can be reduced by fully operating other heaters. Promote and reduce the amount of storage early.

  Furthermore, an evaporating dish for collecting drainage, two heaters for heating the evaporating dish, an energizing path for energizing these heaters, and a thermostat capable of turning on and off the energizing path based on a sensed temperature of the evaporating dish A first water level sensor that detects a water level of the waste water in the evaporating dish and closes a normally open contact portion when the detected water level is equal to or higher than a first set value; and a water level of the waste water in the evaporating dish. And a second water level sensor that closes a normally open contact when the detected water level is greater than or equal to a second set value that is greater than the first set value. And a first series part in which the thermostat and the contact part of the first water level sensor are connected in series; a second series part in which the other heater and the contact part of the second water level sensor are connected in series; Are connected in parallel It may be formed.

When the water level of the waste water is lower than the first set value, that is, when the amount of waste water stored is small, the contact portions of both water level sensors are both open and both heaters are off. When the amount of stored wastewater increases and the water level becomes equal to or higher than the first set value, the contact portion of the first water level sensor is closed, and the wastewater is evaporated while one heater is repeatedly turned on and off by the function of the thermostat. When the amount of stored wastewater further increases and the water level exceeds the second set value, the contact point of the second water level sensor is also closed, so that in addition to the operation of one heater, the other heaters are turned on continuously. The evaporation of waste water is promoted.
When the amount of stored wastewater decreases and the water level falls below the second set value, the contact portion of the second water level sensor opens and the other heaters are turned off, and the process returns to one heater on / off control by the thermostat. When the storage amount further decreases and the water level falls below the first set value, the contact portion of the first water level sensor is also opened, and both heaters are turned off.

  When the amount of stored wastewater is normal, the evaporation capacity can be suppressed to ensure an appropriate amount of evaporation, while in the event of a sudden increase in storage volume, the evaporation capacity is promoted by fully operating other heaters. In addition, the storage amount can be reduced early. In addition, when the amount of wastewater stored is small, both heaters are turned off, so that power consumption can be reduced.

  According to the present invention, an evaporation amount can be ensured by suppressing the evaporation capability at the normal time, while the evaporation capability can be greatly promoted in an emergency in which the amount of stored wastewater increases rapidly.

The longitudinal cross-sectional view of the refrigerator which concerns on Embodiment 1 of this invention Perspective view of drainage evaporation unit Exploded perspective view Same longitudinal section Exploded perspective view of the box Circuit diagram of the current path to the heater The perspective view which shows the wiring structure of the heater which concerns on Embodiment 2. FIG. Circuit configuration diagram of the current path to the heater Sectional drawing which shows the arrangement structure of the float switch which concerns on Embodiment 3. Circuit configuration diagram of the current path to the heater

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, a business-use four-door vertical refrigerator is illustrated. First, the overall structure of the refrigerator will be described with reference to FIG. The refrigerator main body 10 is composed of a vertically long heat insulating box with a front opening, and is supported by legs 11 standing at four corners of the bottom surface. The interior of the refrigerator main body 10 is a storage room 12, and the front opening thereof is partitioned into four openings 14 by a cross-shaped partition frame 13, and a double-split heat insulating door 15 is attached to these openings 14. Yes.

A machine room 17 is provided on the upper surface of the refrigerator body 10, and a refrigeration apparatus 18 is installed therein. The refrigeration apparatus 18 includes a compressor 19, a condenser 20 with a condenser fan 20 </ b> A, and the like, and is attached to a heat-insulating base 21 as a unit. The base 21 is a ceiling of the storage room 12. It is attached so as to close the window hole 10A on the wall.
A drain pan 23 that also serves as an air duct is stretched on the lower surface side of the window hole 10 </ b> A in the ceiling portion of the storage chamber 12, and a cooler chamber 24 is formed above the drain pan 23. The bottom surface of the drain pan 23 is formed to have a downward slope toward the inner edge (the right side in FIG. 1), and a suction port 25 is opened in a front area, and a blower outlet 26 is cut in the rear side. It is not formed.

  Inside the cooler chamber 24, a cooler 28 (evaporator) and an internal fan 29 are provided facing the suction port 25. The cooler 28 is circulated and connected to the above-described refrigeration apparatus 18 by refrigerant piping, and constitutes a known refrigeration cycle. When the internal fan 29 is driven while operating the refrigeration apparatus 18 (compressor 19), the indoor air in the storage chamber 12 is sucked into the cooler chamber 24 from the suction port 25 by the internal fan 29, and the air is While flowing through the cooler 28, cold air is generated by heat exchange, and the cold air is blown out from the outlet 26 along the inner surface of the storage chamber 12, and the cold air is circulated and supplied into the storage chamber 12 to be cooled. It has become so.

On the other hand, in order to remove frost adhering to the cooler 28 and the like, a defrosting operation is appropriately performed. Therefore, the cooler 28 is provided with a defrost heater 31, and a drainage channel 32 is formed vertically on the back wall of the refrigerator body 10. The upper end of the drainage channel 32 is connected to the drainage pipe 23 </ b> A of the drain pan 23, and the drainage port 32 </ b> A at the lower end protrudes from the bottom surface of the refrigerator body 10.
The defrosting operation is performed by energizing and heating the defrosting heater 31. The defrosting water is received by the drain pan 23 and then flows down the drainage channel 32, and is installed on the bottom surface of the refrigerator main body 10 as described later. The waste water evaporation unit 35 is led.

Subsequently, the drainage evaporation unit 35 and the arrangement structure thereof will be described. The drainage evaporation unit 35 is disposed at a position near the front edge on the bottom surface of the refrigerator main body 10.
As shown in FIGS. 2 to 4, the waste water evaporation unit 35 includes an evaporating dish 40 for accumulating waste water made of defrost water, a box 42 with heating means for accommodating the evaporating dish 40, a blower 55, a box 42 is provided with a cover 62 attached to one side surface 42 and a lid plate 63. The evaporating dish 40 is formed in a flat rectangular shallow dish shape from a metal plate such as a stainless steel plate.

As shown in FIG. 5, the box 42 includes a box body 43 made of a metal plate such as a stainless steel plate that substantially accommodates the evaporating dish 40, and has a depth that is slightly less than twice the depth of the evaporating dish 40. The upper surface opening is formed in a relatively shallow box shape, the front surface is opened, and the bottom plate is the mounting plate 45 of the evaporating dish 40.
On the lower surface of the mounting plate 45 of the box main body 43, an evaporation heater 50 made of a code heater is wired in a zigzag manner over the entire surface, and is attached by an aluminum foil tape 51. Lead wires 50A connected to both ends of the evaporation heater 50 are collected, for example, at the right front corner of the mounting plate 45, and a heat insulating plate 52 is disposed on the lower surface side of the aluminum foil tape 51. . A bottom plate 53 made of a metal plate such as a stainless steel plate is mounted on the lower surface side of the box main body 43, and the evaporation heater 50 and the heat insulating plate 52 are sandwiched between the mounting plate 45 of the box main body 43 and the bottom plate 53. It is in the state.

In short, the box 42 is formed in a relatively shallow rectangular box shape with the upper surface and the front surface opened, and the evaporating dish 40 is placed on the mounting plate 45 to be received. An evaporating heater 50 for heating the evaporating dish 40 is attached to the lower side of 45. In addition, the front opening serves as an outside air inlet 46, and an outside air outlet 47 is provided at the upper position of the back end of the right side surface.
As shown in FIGS. 2 and 3, a blower 55 is attached to the outside of the formation position of the outside air outlet 47 in the box 42. This blower 55 is a fan in which a blower fan 56 comprising a fan motor is housed in a box-shaped case 57, and a suction port (not shown) is provided on the front surface of the case 57 (the surface facing the outlet 47). However, the outlet 58 is formed in the rear surface.

The evaporating heater 50 provided in the box 42 and the blower fan 56 provided in the blower 55 are energized from, for example, a commercial power source and are heated or rotated.
Here, the energization path 70 to the evaporation heater 50 is provided with a bimetal thermo 60 (see FIG. 6), which will be described later in detail. As shown in FIG. 2, the bimetal thermo 60 is attached to a lower position of the right side plate of the box main body 43 of the box 42 described above. The bimetal thermo 60 senses the temperature of the box 42 and opens and closes by detecting the temperature. It functions to turn on and off the current path 70. A cover 62 is attached to the mounting surface of the bimetal thermo 60.

  A lid plate 63 is attached to the upper surface opening of the box body 43. Here, a float switch 65 for detecting the water level of the wastewater stored in the accommodated evaporating dish 40 is provided on the back surface of the lid plate 63. More specifically, a bracket 64 is attached to the back surface of the lid plate 63 in a hanging posture, and a float switch 65 is attached to the hanging lower end of the bracket 64 so that the height can be adjusted. Therefore, when the lid plate 63 is attached to the upper surface opening of the box body 43, the float switch 65 is arranged at a predetermined depth position in the evaporating dish 40 accommodated therein. The float switch 65 includes a float 66 and a normally-open contact point 67 (see FIG. 6) that works in conjunction with the lifting and lowering operation. The float switch 65 floats as the water level of the wastewater stored in the evaporating dish 40 increases. 66 rises and functions to close the contact portion 67 when it reaches a predetermined water level.

The drainage evaporation unit 35 assembled as described above is disposed at a predetermined position near the front edge of the bottom surface of the refrigerator main body 10 in a posture with the outside air inlet 46 facing forward, and is provided at an appropriate place. The magnet catch 69 is adsorbed and fixed by screwing appropriately.
On the other hand, one end of a drainage hose 33 is connected to the drainage port 32A at the lower end of the drainage channel 32 provided on the back wall of the refrigerator body 10, and the other end is on the left side surface of the box 42 as shown in FIG. It is inserted into a hose insertion port 48 provided at a position near the back end, and faces the upper left corner of the stored evaporating dish 40.

  In the present embodiment, the energization path 70 to the evaporation heater 50 is configured as shown in FIG. In the energization path 70, the evaporating heater 50 and the bimetal thermo 60 are connected in series. More specifically, the bimetal thermo 60 is closed when the sensed temperature is equal to or lower than a predetermined temperature for closing (for example, 45 ° C.), and is opened when the detected temperature is equal to or higher than the predetermined temperature for opening (for example, 60 ° C.). It functions to turn on and off the current-carrying path 70. In addition, when the defrosting operation is executed, the bimetal thermo 60 gradually accumulates defrost water in the evaporating dish 40, and accordingly, the temperature of the box 42 decreases, and when the predetermined temperature for closing is detected. It also functions as a trigger that closes the energization path 70 to enter, that is, activates the drainage evaporation unit 35.

  And in the electricity supply path 70, the normally open contact part 67 of the float switch 65 is connected in parallel with the bimetal thermo 60 described above. The float switch 65 has its mounting position determined so that the contact portion 67 closes when the wastewater stored in the evaporating dish 40 reaches a predetermined set water level. The water level when only a capacity of 50% is stored is the set water level.

The operation of this embodiment will be described.
A defrosting operation is appropriately performed during the cooling operation. The defrosting operation is performed by energizing the defrosting heater 31 provided in the cooler 28 and heating the cooler 28 while the operation of the refrigeration apparatus 18 (compressor 19) is stopped. As a result, the frost adhering to the cooler 28 and the like is melted and dripped as defrosted water, and the defrosted water is received by the drain pan 23 arranged on the lower surface side of the cooler 28 and then discharged from the drain pipe 23A to the refrigerator. It flows down to the drainage channel 32 embedded in the back wall of the main body 10, passes through the drainage hose 33, drops onto the evaporation tray 40 accommodated in the box 42 of the drainage evaporation unit 35, and is stored as drainage.

  On the other hand, by energizing the evaporating heater 50 closely connected to the lower surface side of the mounting plate 45 of the box 42 in the waste water evaporation unit 35, the mounting plate 45 of the box body 43 is heated, and the evaporating dish 40 and thus the reservoir are stored. The discharged waste water is heated to promote evaporation. At the same time, the blower fan 56 is energized and driven, so that outside air is sucked in from the front inlet 46 and then the upper side of the evaporating dish 40 in the box main body 43 is extended to the rear side on the right side. The wastewater vapor rising from the evaporating dish 40 is discharged to the outside of the wastewater evaporation unit 35 on the circulating outside air. .

  Here, as usual, as long as the amount of wastewater stored in the evaporating dish 40 is an appropriate amount and the water level is lower than the set water level, the contact portion of the float switch 65 in the energizing path 70 of FIG. Since the evaporative heater 50 is controlled to be turned on and off by the function of the bimetal thermo 60, the waste water is only heated within the temperature range before boiling, and the amount of steam is small in a form close to nature. It rises one by one and is discharged.

On the other hand, when a large amount of drainage is stored in the evaporating dish 40 due to a large amount of frost formation and the water level becomes equal to or higher than the set water level, the contact portion 67 of the float switch 65 is closed in the energizing passage 70, thereby causing the bimetal. Regardless of the temperature sensed by the thermo 60, that is, the temperature of the waste water, the evaporation heater 50 is continuously turned on, and the evaporation is promoted by continuing the heating of the waste water.
When the amount of stored wastewater decreases and the water level falls below the set water level, the contact portion 67 of the float switch 65 opens, and the process returns to the on / off control of the evaporation heater 50 by the bimetal thermo 60 again.

  As described above, according to the present embodiment, when the amount of stored wastewater is normal, it is possible to suppress the evaporation capability and to ensure a small amount of evaporation operation. On the other hand, when the amount of stored water suddenly increases, The heater 50 is fully operated to promote the evaporation capability, and the storage amount can be reduced at an early stage. As a result, even when the drainage flows down again to the evaporating dish 40 during the next defrosting operation or the like, it is possible to prevent the drainage from overflowing the evaporating dish 40.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, as shown in FIG. 7, the evaporating heater disposed below the mounting plate 45 of the evaporating dish 40 in the box 42 has the same amount of heat as the evaporating heater 50 shown in the first embodiment. Two heaters 81 and an auxiliary heater 82 are provided, and both the heaters 81 and 82 are arranged in a zigzag pattern.
On the other hand, other structures including the provision of the float switch 65 for detecting the water level of the wastewater stored in the evaporating dish 40 are the same as those in the first embodiment.

  As shown in FIG. 8, the energization path 80 to the main heater 81 and the auxiliary heater 82 is composed of a main series portion 83 in which the main heater 81 and the bimetal thermo 60 are connected in series, the auxiliary heater 82 and the float switch. The auxiliary series part 84 in which 65 contact parts 67 are connected in series is connected in parallel.

The aspect of wastewater evaporation in the second embodiment is as follows.
As usual, while the amount of wastewater stored in the evaporating dish 40 is an appropriate amount and the water level is lower than the set water level, the contact portion 67 of the float switch 65 is connected to the current path 80 in FIG. Since the main heater 81 is controlled to be turned on and off by the function of the bimetal thermo 60 because it is in an open state, the waste water is kept within the temperature range before boiling, and steam rises little by little in a form close to nature. Discharged.

  On the other hand, when a large amount of waste water is stored in the evaporating dish 40 due to a large amount of frost formation, and the water level becomes equal to or higher than the set water level, the contact portion 67 of the float switch 65 is closed in the energizing path 80, thereby In addition to the operation of the main heater 81, the auxiliary heater 82 is continuously turned on, and at least the heating of the waste water by the auxiliary heater 82 is continued to promote evaporation. When the amount of stored wastewater decreases and the water level falls below the set water level, the auxiliary heater 82 is turned off by opening the contact portion 67 of the float switch 65, and the main heater 81 is turned on / off again by the bimetal thermo 60. Return.

  According to the second embodiment, when the amount of stored wastewater is normal, the evaporation capability can be suppressed to ensure a small amount of evaporation operation. On the other hand, at the time of emergency when the amount of storage suddenly increases, at least the auxiliary heater 82. Can be fully operated to promote evaporation capacity and reduce the storage amount at an early stage. As a result, even when the drainage flows down again to the evaporating dish 40 during the next defrosting operation or the like, it is possible to prevent the drainage from overflowing the evaporating dish 40.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIGS.
In this third embodiment, as compared with the first embodiment, as in the second embodiment, in addition to being equipped with two main heaters 81 and an auxiliary heater 82 as evaporating heaters, they are stored in the evaporating dish 40. As shown in FIG. 9, two float switches, ie, a first float switch 91 and a second float switch 92 having different installation positions, are provided as float switches for detecting the level of the discharged wastewater. .

  In the second float switch 92 on the higher side, the set water level (second set water level H2) at which the normally open contact portion 92A is closed is the same as the float switch 65 of the first embodiment. 3L) is the water level when only 50% of the capacity is stored. On the other hand, the set water level (first set water level H1) at which the normally open contact portion 91A of the first float switch 91 on the lower side closes is 1/6 of the capacity (0) of the total capacity (3L) of the evaporating dish 40. Water level when only 5L) is stored.

  As shown in FIG. 10, the energization path 90 to the main heater 81 and the auxiliary heater 82 is a first in which the main heater 81, the bimetal thermo 60, and the contact portion 91A of the first float switch 91 are connected in series. The series part 93, the auxiliary heater 82, and the second series part 94 in which the contact part 92 </ b> A of the second float switch 92 are connected in series are connected in parallel.

The aspect of waste water evaporation in Embodiment 3 is as follows.
When the water level of the wastewater stored in the evaporating dish 40 is lower than the first set water level H1, that is, when the amount of stored wastewater is small, the first float switch 91 and the second float switch in the current path 90 of FIG. 92, both contact portions 91A and 92A are in an open state, and both the main heater 81 and the auxiliary heater 82 are in an off state. When the amount of stored wastewater increases and the water level becomes equal to or higher than the first set water level H1, the contact portion 91A of the first float switch 91 is closed, so that only the main heater 81 is controlled to be turned on and off by the function of the bimetal thermo 60. Is heated to within the temperature range before boiling, and steam rises and is discharged little by little in a form close to nature.
When the amount of stored wastewater further increases and the water level becomes equal to or higher than the second set water level H2, the contact portion 92A of the second float switch 92 is also closed, so that the auxiliary heater 82 continues in addition to the operation of the main heater 81 described above. Then, it is turned on, and at least the heating of the waste water by the auxiliary heater 82 is continued to promote evaporation.

  When the amount of stored wastewater decreases and the water level falls below the second set water level H2, the contact portion 92A of the second float switch 92 is opened, the auxiliary heater 82 is turned off, and the main heater 81 is turned on / off by the bimetal thermo 60 Return to control. When the storage amount further decreases and the water level falls below the first set water level H1, the contact portion 91A of the first float switch 91 is also opened, so that both the main heater 81 and the auxiliary heater 82 are turned off.

  According to the third embodiment, when the amount of stored wastewater is normal, the evaporation capability can be suppressed to ensure a small amount of evaporation operation. On the other hand, at the time of sudden increase in the amount of storage, at least the auxiliary heater 82. Can be fully operated to promote evaporation capacity and reduce the storage amount at an early stage. In addition, when the amount of wastewater stored becomes small, both the heaters 81 and 82 are turned off, so that power consumption can be reduced.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The heater for evaporating the waste water may be wired directly on the bottom surface of the evaporating dish.
(2) The set value of the water level at which the contact point of the float switch is closed is not limited to that exemplified in the above embodiment, and can be arbitrarily determined.
(3) In the second and third embodiments, the case where the capacity of the auxiliary heater is the same as that of the main heater is illustrated, but can be arbitrarily set.

(4) The attachment position of the bimetal thermo may be another position as long as the temperature of the evaporating dish can be sensed with high sensitivity.
(5) The thermostat is not limited to the bimetal thermostat exemplified in the embodiment, and other types of thermostats such as a liquid type can be applied.
(6) The water level sensor is not limited to the float switch exemplified in the embodiment, and other types of water level sensors such as an electrode type may be applied.

(7) In the above embodiment, the case where the blower is provided to quickly discharge the rising steam is exemplified, but it is not always necessary to be provided, and such a thing is also included in the technical scope of the present invention.
(8) The wastewater stored in the evaporating dish may be internal wastewater, or both defrosted water and internal wastewater.
(9) Further, the present invention is not limited to the vertical refrigerator illustrated in the above embodiment, but is widely applied to all types of cooling storages equipped with a drainage evaporation unit, such as other types of refrigerators, refrigerators and refrigerators. be able to.

  DESCRIPTION OF SYMBOLS 40 ... Evaporating dish 50 ... Evaporating heater (heater) 60 ... Bimetal thermostat (thermostat) 65 ... Float switch (water level sensor) 67 ... Contact part 70 ... Current path 80 ... Current path 81 ... Main heater (one heater) 82 ... Auxiliary Heater (other heater) 83 ... main series part (one series part) 84 ... auxiliary series part (other series part) 90 ... current path 91 ... first float switch (first water level sensor) 92 ... second float switch (Second water level sensor) 91A ... Contact part 92A ... Contact part 93 ... First series part 94 ... Second series part

Claims (3)

An evaporating dish to collect drainage,
A heater for heating the evaporating dish;
An energizing path for energizing the heater to generate heat;
A thermostat capable of turning on and off the energization path based on the sensed temperature of the evaporating dish;
A water level sensor that detects the water level of the waste water in the evaporating dish and closes the normally open contact point when the detected water level is equal to or higher than a set value; and
The drainage evaporator according to claim 1, wherein the thermostat is connected in series with the heater in the energization path, and the contact portion of the water level sensor is connected in parallel with the thermostat. An evaporating dish to collect drainage,
Two heaters for heating the evaporating dish,
An energization path for energizing these heaters to generate heat;
A thermostat capable of turning on and off the energization path based on the sensed temperature of the evaporating dish;
A water level sensor that detects the water level of the waste water in the evaporating dish and closes the normally open contact point when the detected water level is equal to or higher than a set value; and
In the energization path, one series part in which the one heater and the thermostat are connected in series and another series part in which the other heater and the contact part of the water level sensor are connected in series are connected in parallel. A drainage evaporator characterized by being made. An evaporating dish to collect drainage,
Two heaters for heating the evaporating dish,
An energization path for energizing these heaters to generate heat;
A thermostat capable of turning on and off the energization path based on the sensed temperature of the evaporating dish;
A first water level sensor that detects the water level of the waste water in the evaporating dish and closes the normally open contact portion when the detected water level is equal to or higher than a first set value;
A second water level sensor that detects the water level of the waste water in the evaporating dish and closes the normally open contact point when the detected water level is equal to or higher than a second set value greater than the first set value;
In the energization path, a first series part in which the one heater, the thermostat, and the contact part of the first water level sensor are connected in series, and the other heater and the contact part of the second water level sensor are provided. A wastewater evaporation apparatus characterized in that a second series part connected in series is connected in parallel.

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