JP2010117038A - Refrigerator - Google Patents

Abstract

An object of the present invention is to increase the volumetric efficiency of a vegetable room located at the bottom of a refrigerator and improve the user-friendliness.
In a refrigerator in which a refrigerator compartment 104, a freezer compartment 107, and a vegetable compartment 108 are formed at the bottom, a compressor 102 is provided at the upper back of the refrigerator main body, and an evaporator 109 is provided at a rear position of the freezer compartment 107. A drainage path 202 and a drainage pipe 203 that guides drain water to the outside of the refrigerator 109 are disposed below the vessel 109, and a defrosting water evaporation device 110 is disposed at the lower back of the refrigerator main body. The defrosting water evaporation device includes an evaporating dish 204 and an internal space. The air passage 206 formed in the refrigeration cycle and a part of the condensing pipe 209 of the refrigeration cycle circuit are provided at the bottom, and the air blowing means 207 is configured to forcibly convect the air to the air passage. The air blowing means 207 is operated synchronously with the compressor 102. Thus, since an efficient evaporating action can be obtained, the defrosted water evaporator 110 can be downsized, and the storage efficiency of the lowermost vegetable room can be greatly improved.
[Selection] Figure 2

Description

  The present invention relates to an evaporator for defrosted water and a refrigerator using the same.

  Conventionally, this kind of refrigerator defrost water evaporation method employs a method of using heat obtained together with cooling or heat dissipation of the heat-generating components to evaporate the defrost water stored in the evaporating dish. There are various methods for the heat source. For example, the defrosted water may be directly heated.

  FIG. 8 shows a conventional refrigerator described in Patent Document 1. As shown in FIG. As shown in FIG. 8, provided on the upper side of the refrigerator body 1, the refrigeration cycle storage part 2 in which the refrigeration cycle is stored, the evaporating dish 3 provided at the lower part of the refrigerator body 1, and the refrigerator body 1. Next to the refrigeration cycle storage unit 2 are provided an evaporator 4 and heat source means 5 for removing frost on the surface of the evaporator 4.

  When the heat source means 5 is heated, the outside air is heated by the heat generating parts of the refrigeration cycle as the outside air is sucked into the water passage 6 for supplying the defrosted water to be dropped to the evaporating dish 3 and the refrigeration cycle storage unit 2. A fan device 7 that warms the air and a duct 8 that is provided in the refrigerator main body 1 and that supplies the hot air discharged from the fan device 7 to the evaporating dish 3 are provided.

  Next, an outline of the configuration of a conventional refrigeration cycle will be described with reference to FIGS. The high-temperature gas refrigerant discharged from the compressor 9 becomes a medium-temperature liquid refrigerant in the process of passing through the condenser 10, and becomes a low-temperature liquid refrigerant by the capillary tube 11. Evaporation occurs in the process of passing the low-temperature liquid refrigerant through the evaporator 4, and the closed-loop is returned to the compressor 9. Since the evaporator 4 has a low temperature, it forms as frost on the surface of the evaporator 4 when exchanging heat with the air in the storage compartment 12.

Since the frost accumulates as the operation time of the compressor 9 elapses, the heat source means 5 is appropriately heated to remove the frost on the surface of the evaporator 4, the frost is defrosted, and the defrost water evaporates through the water passage 6. It is supplied to the dish 3. The compressor 9 and the condenser 10 which are heat generating components in the refrigeration cycle storage unit 2 are cooled and radiated by the air sucked from the outside air by the fan device 7, and the generated hot air is sent from the duct 8 to the opening of the evaporating dish 3. The water temperature in the evaporating dish 3 is raised to evaporate (see, for example, Patent Document 1).
JP-A-8-247626

  In the case of this type of evaporation method, there are the following three items as factors for evaporating water. The first is the surface wind speed, the second is the water temperature, and the third is the area of the opening where water and outside air contact. However, in the above-described conventional configuration, the wind speed passing through the surface of the evaporating dish 3 is weak and water evaporation is inefficient, and since the heat source is not disposed at the bottom, the wind of the duct 8 from the heat source to the bottom is Since the heat loss in the road is large and it is inefficient to increase the water temperature, it is necessary to increase the opening area of the evaporating dish 3, and there is a problem that the volumetric efficiency of the storage chamber cannot be increased.

  The present invention solves the above-mentioned conventional problems, and improves the evaporation performance by adopting a configuration capable of controlling the water velocity as the first factor and the water temperature as the second factor as factors for evaporating water. The purpose is to provide a refrigerator that can greatly improve the food storage efficiency of consumers because the volumetric efficiency of the vegetable room can be greatly increased by reducing the opening area of the evaporating dish and making it compact. And

  In order to solve the above-mentioned conventional problems, the refrigerator of the present invention comprises a refrigerator room, a freezer room, a vegetable room at the bottom, a compressor at the upper back of the refrigerator body, and an evaporator at the rear position of the freezer room. A drainage pipe that guides the drainage path and drain water to the outside of the evaporator below the evaporator, and a defrosting water evaporation device is arranged at the lower back of the refrigerator main body, and the defrosting water evaporation device is located below the drainage pipe. A dish-shaped evaporating dish with a sealed upper surface for receiving drain water, the evaporating dish has at least two openings, an air passage formed in an internal space, and a part of a condensing pipe of a refrigeration cycle circuit at the bottom. The air passage is composed of air blowing means for forcing convection of air, and the air blowing means is operated synchronously with the compressor.

  As a result, the temperature of the condensing pipe rises to the saturation temperature of the high-pressure pressure of the refrigeration cycle when the compressor is in operation, so that the drain water in the evaporating dish can be efficiently raised. Efficient evaporation is obtained. Conversely, when the compressor is stopped, the saturation temperature of the pressure that balances the refrigeration cycle is greatly reduced. Therefore, in order to prevent the drain water temperature in the evaporating dish from being lowered, efficient evaporation can be achieved by stopping the blowing means. Since an effect | action can be acquired, a defrost water evaporation apparatus can be reduced in size and the storage efficiency of the bottom vegetable room can be improved significantly.

  The present invention solves the above-described conventional problems, and in addition to arranging the compressor at the upper rear part of the refrigerator main body, the evaporation performance is greatly improved by optimally controlling the water temperature and the wind speed of the water surface. Since the compact defrosting water evaporation device can be placed behind the vegetable room, the volumetric efficiency of the vegetable room can be greatly increased, and the food storage efficiency of the user can be greatly improved.

  1st invention is the refrigerator which comprised the refrigerator compartment from the top, the freezer compartment, and the vegetable compartment in the lowermost part. In the refrigerator main body back upper part, a compressor is located in the back position of a freezer compartment, and this evaporator is below. A drainage pipe and a drain pipe that guides drain water to the outside of the refrigerator, a defrost water evaporation device is arranged at the lower back of the refrigerator body, and the defrost water evaporation device seals the upper surface that receives drain water below the drain pipe A dish-shaped evaporating dish, the evaporating dish has at least two openings, an air passage formed in the internal space, and a part of a condensing pipe of a refrigeration cycle circuit at the bottom, forcing air into the air passage It is comprised with the ventilation means made to convect, and the said ventilation means carries out synchronous operation with the said compressor.

  As a result, the temperature of the condensing pipe rises to the saturation temperature of the high-pressure pressure of the refrigeration cycle when the compressor is in operation, so that the drain water in the evaporating dish can be efficiently raised. Efficient evaporation is obtained. Conversely, when the compressor is stopped, the saturation temperature of the pressure that balances the refrigeration cycle is greatly reduced. Therefore, in order to prevent the drain water temperature in the evaporating dish from being lowered, efficient evaporation can be achieved by stopping the blowing means. Since an effect | action can be acquired, a defrost water evaporation apparatus can be made compact and the storage efficiency of the bottom vegetable room can be improved significantly.

  According to a second invention, in the first invention, the depth dimension of the defrosting water evaporator is made substantially the same as the depth dimension of the evaporator, so that the compressor is disposed at the upper rear part of the refrigerator main body, and the evaporator And the defrosting water evaporation device can be arranged up and down, and the defrosting water evaporation device with a depth dimension similar to the depth dimension of the evaporator can be arranged at the rear of the vegetable room. This can greatly improve the food storage efficiency of the user.

  According to a third invention, in the first or second invention, the internal temperature of the storage room after defrosting temporarily rises by operating the air blowing means for a certain time in conjunction with the end of the defrosting operation, and the refrigeration cycle Since the high pressure of the water rises from the normal stable cycle and the temperature of the condensing pipe rises to a higher temperature than normal, the temperature of the drain water in the evaporating dish can be raised efficiently, so it is constant longer than usual. By operating the time blowing means, the evaporation capacity can be increased and the defrost water evaporation apparatus can be made compact, and the storage efficiency of the lowermost vegetable room can be greatly improved.

  According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a water level detection means is provided in the evaporating dish, and if there is a risk of overflow, an abnormality is notified to the user of the refrigerator. Can be notified.

  According to a fifth invention, in any one of the first to fourth inventions, when the water level detection means reaches a certain water level, the air blowing means is operated, and when the water level detection means is detected below the certain water level, the air blowing means is stopped. Since the heat dissipating capacity of the condensing pipe can be used effectively, the amount of power consumption can be reduced, the defrosting water evaporator can be made compact, and the storage efficiency of the lowermost storage chamber can be greatly improved.

  According to a sixth aspect of the invention, in any one of the first to fifth aspects of the invention, the water level detection means is a resistance thermistor, thereby providing an inexpensive refrigerator with reduced power consumption.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
Fig.1 (a) is a front view of the refrigerator in Embodiment 1 of this invention, FIG.1 (b) is center sectional drawing.

  In FIG. 1, a compressor 102 is configured in a first machine room 103 which is a space formed in the upper part of the refrigerator main body 101. The structure of the refrigerator main body 101 from the top is the refrigerating room 104, the ice storage room 105 installed in parallel under the refrigerating room 104, the first freezing room 106, and the first freezing room 106. 2 freezer compartments 107, a vegetable compartment 108 configured at the bottom, an evaporator 109 configured substantially rearward of the second freezer compartment 107, and a second configured at the lower back of the refrigerator main body 101. A defrost water evaporation device 110 is provided in the machine room 111. Note that the first freezer compartment 106 may be a switchable storage room such as a refrigeration temperature zone or a fine refrigeration temperature zone, and is not limited to a freezer compartment.

  FIG. 2A is a schematic view of the defrosted water evaporation device 110, and FIG.

  1 and 2, the evaporator 109, the drainage passage 202 for leading the drain water of the evaporator 109, the drain pipe 203 for leading the drain water to the outside of the warehouse, and the defrosting water. The evaporator 110 includes an evaporating dish 204 that receives drain water below the drain pipe 203, the evaporating dish 204 has a dish shape with a sealed upper surface, two openings 205, and an air passage 206 formed in the internal space. The air flow path 206 is forcibly convected with air blowing means 207. The depth dimension L of the evaporating dish 204 is substantially the same as the evaporator depth.

  The heat source means is constituted by a condensation pipe 209 in the condensation zone in the refrigeration cycle. The shape of the condensing pipe 209 is a spiral shape, a shape that can be densely configured in the evaporating dish 204, and is configured at the bottom of the evaporating dish 204. The condensing pipe 209 as the heat source means can be variously configured and is not limited to this specification.

  The entire wind flow in the second machine chamber 111 is as follows. The blower 207 sucks fresh fresh air from the suction portion 211 of the cover 210 of the second machine chamber 111, and the air path from one side of the opening 205. The wind flows from the blowing part 212 of the cover 210 through the other opening part 205 through 206. The form of the air path and the structure of the air blowing means can be variously arranged and are not limited.

  FIG. 3 is an operation algorithm explanatory diagram of the blowing means 207 of the defrosting water evaporator 110 of the refrigerator according to Embodiment 1 of the present invention.

  Next, the evaporating action of the defrosted water evaporator 110 will be described with reference to FIGS. 1, 2, and 3. Although the detailed description of the refrigeration cycle is omitted since it has the same configuration as the conventional one, the evaporator 109 is at a low temperature, and the refrigerator compartment 104, the ice storage compartment 105, the first freezer compartment 106, the second freezer compartment in each storage compartment. When heat is exchanged with the air in the chamber 107 and the vegetable chamber 108, frost is formed on the surface of the evaporator 109.

  Since the frost accumulates as the operation time of the compressor 102 elapses, the heat source means 213 is appropriately heated to remove the frost on the surface of the evaporator 109, the frost is defrosted, and the drain water passes through the drain pipe 203 and the evaporating dish 204. To be supplied. By sealing the upper part of the evaporating dish 204, the air passage 206 has a single air passage configuration passing over the water surface of the drain water 202, and the air speed is greatly increased as compared with the conventional case. This increase in wind speed greatly improves the evaporation performance of the drain water.

  Further, the wind speed increases as the water level in the evaporating dish 204 rises, and the evaporation performance is also improved. Accordingly, the drain water evaporates from the evaporating dish 204 due to the wind speed of the blowing means 207. It is known that the evaporation performance and the area of the upper surface of the evaporation tray 204 are generally in a proportional relationship. Therefore, the area of the upper surface of the evaporating dish 204 can be significantly reduced by increasing the wind speed. Further, the evaporation amount can be adjusted by setting the wind speed of the blowing means 207.

  The operation of the air blowing means 207 is synchronized with the operation of the compressor 102. Next, the synchronous operation of the blower 207 and the compressor 102 will be described with reference to FIG.

  When the compressor 102 (line a) starts operation at point A, the high pressure (line b) increases, and the temperature of the condensation pipe 209 (line c) also increases. The temperature of the condensing pipe 209 (c line) is substantially the saturation temperature of the high pressure (b line). The temperature (d line) of the drain water in the evaporating dish 204 also rises. When the interior of each storage chamber reaches the set temperature, the compressor 102 stops at point B.

  When the compressor 102 is stopped, the high pressure (b line) decreases, so the temperature of the condensing pipe 209 (c line) also decreases at the same time, and the temperature of the drain water in the evaporating dish 204 (d line) also decreases. Water evaporation has a certain proportional relationship with water temperature. Therefore, when the temperature of the drain water is high, operating the air blowing means 207 (e line) can achieve the most efficient evaporation from the viewpoint of power consumption and the reliability of the air blowing means 207. When the air blowing means 207 is operated during the stop, the temperature drop of the drain water is promoted, which is inefficient. Therefore, the air blowing means 207 is operated in synchronism when the compressor 102 is operated.

  The defrosted water evaporator 110 according to the present invention includes a water surface wind speed, water temperature, and opening area, which are factors for evaporating water. The evaporating dish 204 can be reduced in size by increasing the water temperature by the condensing pipe 209, and the depth can be configured to be substantially the same as the evaporator depth by increasing the degree of design freedom.

  As described above, in the refrigerator having the refrigerator compartment 104, the freezer compartment 107 from the top, and the vegetable compartment 108 at the bottom, the compressor 102 is provided at the upper back of the refrigerator main body, and the evaporator 109 is provided at the rear position of the freezer compartment 107. A drainage path 202 and a drainage pipe 203 that guides drain water to the outside of the refrigerator are disposed below the evaporator, and a defrosting water evaporation apparatus 110 is disposed at the lower back of the refrigerator main body. The defrosting water evaporation apparatus 110 is disposed below the drainage pipe. A dish-shaped evaporating dish 204 with a sealed upper surface for receiving drain water, the evaporating dish 204 has at least two openings 205, an air passage 206 formed in the internal space, and a part of the condensing pipe 209 of the refrigeration cycle circuit At the bottom, and is configured by a blowing means 207 for forcing convection of air to the air passage 206. By operating the blowing means 207 in synchronization with the compressor 102, the temperature of the condensing pipe 209 is controlled by the compressor operation. Time it is possible to effectively increase the drain water in the evaporating dish 204 to rise up to the saturation temperature of the high-pressure side pressure of the refrigeration cycle, efficient vaporization effect can be obtained when the operating the blowing means 207. On the contrary, when the compressor 102 is stopped, the saturation temperature of the pressure that balances the refrigeration cycle is greatly reduced. Therefore, the defrosting water evaporator 110 can be made compact, and the storage efficiency of the lowermost vegetable compartment 108 can be greatly improved.

  Further, since the depth dimension of the defrosting water evaporator 110 can be designed to be substantially the same as the depth dimension of the evaporator 109, the evaporator 109 and the defrosting water evaporator can be arranged in addition to the compressor 102 being arranged at the upper back of the refrigerator main body. 110 can be arranged up and down, and the defrosted water evaporation device 110 having a depth dimension similar to the depth dimension of the evaporator 109 can be arranged behind the vegetable compartment 108, greatly increasing the storage efficiency of the bottom vegetable compartment 108. This can greatly improve the user's food storage efficiency.

  In addition, in this Embodiment, although the lowest step part of the refrigerator was demonstrated as a vegetable room, you may use it as refrigerated storage rooms other than vegetables.

(Embodiment 2)
FIG. 4 is an operation algorithm explanatory diagram of the air blowing means 207 of the defrosting water evaporator 110 of the refrigerator in the second embodiment of the present invention.

  The difference from the first embodiment is the control operation after the heat source means 213 in the defrost mode is activated. The evaporator 109 has a low temperature and is used to exchange heat with the air in the refrigerator compartment 104, the ice storage compartment 105, the first freezer compartment 106, the second freezer compartment 107, and the vegetable compartment 108 in each storage compartment. It forms as frost on the surface. Since the frost accumulates as the operation time of the compressor 102 elapses, the heat source means 213 is heated to appropriately remove the frost on the surface of the evaporator 109.

  In FIG. 4, after the defrosting operation (line f) by the heat source means 213, when the compressor 102 (line a) starts operating at point A, the air blowing means 207 (line e) also starts operating at a certain time T, for example 4 The blowing means 207 (line e) is continuously operated up to point B after time. As a result, the internal temperature of the storage chamber temporarily rises after the heat source means 213 is heated, so that the high-pressure pressure (b line) in the refrigeration cycle rises from the normal stable cycle, so the temperature of the condensing pipe 209 (c line) ) Also rises to a higher temperature than usual, so that the temperature of the drain water in the evaporating dish (d line) can be increased efficiently, so that an efficient evaporating action can be obtained and the condensing pipe 209 is shortened. Or downsizing of the defrosted water evaporator can be achieved.

  Note that the air blowing means 207 may be operated not only immediately after the heat source means 213 is stopped but also before and after that.

  In addition, since the high pressure of the refrigeration cycle increases when the storage chamber temperature rises, detection means that can detect the condition that the storage chamber temperature rises, such as sensors in each storage chamber, The same effect can be obtained even when the air blowing means 207 is operated in the same manner as the above algorithm in combination with the door opening / closing detection means which is a means capable of detecting the intrusion of the thermal load that opens and closes each storage compartment door when using the refrigerator. It is not limited.

  As described above, by continuously operating the blowing means for a certain period of time after defrosting, the defrosting water evaporator can be made compact, and the storage efficiency of the lowest vegetable room can be greatly improved.

(Embodiment 3)
FIG. 5 is a schematic diagram of a defrosting water evaporation device 501 for a refrigerator according to Embodiment 3 of the present invention.

  A difference from the second embodiment is that a water level detecting means 502 is provided in the evaporating dish 204 of the defrost water evaporating apparatus 501. When the air blowing means 207 is abnormal, for example, when the air blowing means 207 cannot be operated and there is a risk that the water level in the evaporating dish 204 rises and overflows, the abnormality notification means is used to appropriately provide information to the user using the refrigerator. I can do it. It should be noted that there are a wide variety of abnormality notification means, and they are not limited to a unique one.

  As described above, by providing the water level detection means 502 in the evaporating dish 204, when the air blowing means 207 is abnormal, for example, when the air blowing means 207 cannot be operated and the water level in the evaporating dish 204 rises, there is a risk of overflow. If there is, the abnormality notification means can be used to properly give the user who uses the refrigerator.

(Embodiment 4)
FIGS. 6 (a) and 6 (b) are operation algorithm explanatory diagrams of the air blowing means 207 and the water level detecting means 502 of the defrosted water evaporator 501 of the refrigerator in the fourth embodiment of the present invention.

  The difference from the third embodiment is that when the water level (g line) in the evaporating dish 204 of the defrost water evaporator 501 is point A and the water level detection means 502 reaches a certain water level h1, the air blowing means 207 is operated, and point B When the constant water level h2 or less is detected, the blower 207 is stopped. The constant water level h1 is set to be equal to or higher than the upper end position of the condensing pipe 209, and the constant water level h2 is set to a position that is approximately half the helical diameter of the condensing pipe 209, for example.

  As a result, about 50% or more of the condensing pipe 209 is always immersed in the drain water, and therefore the condensing pipe 209 has a heat dissipating capability several times that in the case of air convection, which greatly improves the heat dissipating capability. I can do it. Note that the control point of the water level and the control of the air blowing means 207 are variously considered and are not limited uniquely.

  As described above, when the water level detecting means 502 reaches a certain water level, the air blowing means 207 is operated, and when the water level detecting means 502 is detected below the certain water level, the air blowing means 207 is stopped, thereby greatly improving the heat radiation capacity of the condensing pipe 209. Therefore, the amount of power consumption can be reduced, the defrosted water evaporator 501 can be made compact, and the storage efficiency of the lowermost vegetable compartment 108 can be greatly improved.

(Embodiment 5)
FIG. 7 is a schematic diagram of a defrosted water evaporator 701 for a refrigerator according to Embodiment 5 of the present invention.

  The difference from the third embodiment is that the water level detection means 502 is a resistance thermistor 702. The arrangement position of the resistance thermistor 702 is a position where the suction air temperature in the vicinity of the blowing means 207 can be detected in the horizontal direction of the evaporating dish 204 of the defrosting water evaporator 701, and the height direction of the evaporating dish 204 is a constant water level h1. And an intermediate position between the constant water level h2.

  As a result, when the drain water level is h1 or higher, the detection temperature of the resistance thermistor 702 is lower than h2, and the detection temperature of the drain water heated by the condensing pipe 209 is compared with the defrosted water evaporator 701. When the intake air temperature is detected, a temperature difference occurs, so that the controllability equivalent to that of the water level detection means 502 can be obtained, and a very inexpensive and simple detection configuration can be made.

  As described above, by using the resistance thermistor 207 as the water level detection means, an inexpensive refrigerator with reduced power consumption can be provided.

  As described above, the refrigerator equipped with the defrosted water evaporation apparatus according to the present invention can greatly improve the evaporation performance by optimally controlling the water temperature and the wind speed of the water surface, and the opening area of the evaporation dish can be reduced. Since it can be made small and the defrost water evaporation device can be made compact, it can be applied not only to household refrigerators but also to commercial refrigeration devices.

(A) Front view of refrigerator in embodiment 1 of the present invention (b) Central sectional view of the refrigerator (A) Schematic diagram of the defrosting water evaporator of the refrigerator (b) Perspective view of the main part of the defrosting water evaporator Explanatory drawing of operation algorithm for air blowing means of defrost water evaporator of refrigerator in embodiment 1 of the present invention Explanatory drawing of operation algorithm for blowing means of defrosting water evaporator of refrigerator in embodiment 2 of the present invention Schematic of the defrost water evaporator of the refrigerator in Embodiment 3 of this invention (A) Schematic diagram of a defrosting water evaporator of a refrigerator in Embodiment 4 of the present invention (b) Operation algorithm explanatory diagram of the blowing means and the water level detecting means of the defrosting water evaporator Schematic of the defrost water evaporator of the refrigerator in Embodiment 5 of this invention (A) Sectional view of a conventional refrigerator (b) AA line sectional view Explanatory drawing of refrigeration cycle of conventional refrigerator

Explanation of symbols

101 Refrigerator body 102 Compressor 104 Cold room 105 Ice storage room (freezer room)
106 1st freezer compartment (freezer compartment)
107 Second freezer compartment (freezer compartment)
DESCRIPTION OF SYMBOLS 108 Vegetable room 109 Evaporator 110 Defrost water evaporation apparatus 202 Drain path 203 Drain pipe 204 Evaporating dish 205 Opening part 206 Air path 207 Blowing means 209 Condensation pipe 501 Defrost water evaporation apparatus 502 Water level detection means 701 Defrost water evaporation apparatus 702 Resistive thermistor

Claims (6)

  Refrigerator, freezer compartment, and vegetable compartment at the bottom of the refrigerator, a compressor at the upper back of the refrigerator body, an evaporator at the rear of the freezer compartment, and a drainage channel and drain water below this evaporator A dish-shaped evaporating dish in which a drain pipe leading to the outside of the refrigerator is disposed at the lower back of the refrigerator main body, and the upper surface that receives drain water is sealed below the drain pipe. And the evaporating dish comprises at least two openings, an air passage formed in the internal space, and a blower unit that includes a part of the condensation pipe of the refrigeration cycle circuit at the bottom and forcibly convects air to the air passage. And the said air blower is operated synchronously with the said compressor, The refrigerator characterized by the above-mentioned.   The refrigerator according to claim 1, wherein the depth dimension of the defrosting water evaporator is substantially the same as the depth dimension of the evaporator.   The refrigerator according to claim 1 or 2, wherein the blower is operated for a predetermined time in conjunction with the end of the defrosting operation.   The refrigerator according to any one of claims 1 to 3, wherein a water level detection means is provided in the evaporating dish and an abnormality is notified when there is a risk of overflow.   The refrigerator according to any one of claims 1 to 4, wherein when the water level detection means reaches a certain water level, the air blowing means is operated, and when the water level detection means detects a certain water level or less, the air blowing means is stopped.   The refrigerator according to any one of claims 1 to 5, wherein the water level detection means is a resistance thermistor.