JPH10132445A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently cool a compressor by a method wherein a center axis of an annular condenser is aligned in a substantial linear line with a center axis of each of the compressor and a cooling fan in such a way that the cooling fan is sandwiched by the annular condenser and the compressor. SOLUTION: An annular condenser 5 formed of a metal having a good thermal conductivity is arranged between a compressor 3 and a cooling fan 4 within a machine chamber 2 formed at the lower part of the main body 1 of a refrigerator in such a way that its center axis is aligned in a substantial linear line with a center axis of each of the compressor 3 and the cooling fan 4. When the compressor 3 is operated, the cooling fan 4 is operated simultaneously with the operation of the compressor 3, the surrounding atmosphere passes through a suction port 16 and is sucked, passes through the annular condenser 5, passes through a partition plate 8 and the cooling fan 4 and then the air is blown to the compressor 3 side. A flow of air generated by the cooling fan 4 passes between the fans 10 of the annular condenser 5 and is discharged into the machine chamber 2. The annular condenser 5 is cooled with the air flow between the fans 10 so as to perform condensation of refrigerant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a structure in which a compressor and a condenser are provided in a machine room at a lower portion of a main body, and these are forcibly cooled by a fan.

[0002]

2. Description of the Related Art In recent years, in refrigerators, a condensing pipe has been arranged on the back side of a main body cabinet to dissipate heat of condensed heat in the entire cabinet. A state that cannot be covered by the heat radiation has occurred.

For this reason, in a conventional refrigerator, in addition to the above-described heat radiation in the main body cabinet, Japanese Patent Application Laid-Open No.
As described in JP-A-77-77, a configuration is also provided in which a condenser is disposed in a machine room, and the condenser is forcibly cooled together with a compressor by a cooling fan. Hereinafter, a conventional refrigerator described in Japanese Patent Application Laid-Open No. 4-174277 will be described with reference to FIG.

FIG. 17 is a perspective view of a machine room of a conventional refrigerator. In FIG. 17, 3 is a compressor, 6 is a condenser, and a cooling fan 4 is provided between the compressor 3 and the condenser 6. And a partition plate 8, and the inside of the machine room is partitioned into the compressor 3 side and the condenser 6 side by the partition plate 8. These main members are all arranged on a base plate 7, and the base plate 7 is fixed to the main body by bolts or the like. Further, since the machine room cover 37 is provided on the back of the machine room 2, the inside of the machine room 2 is substantially closed when formed as a refrigerator. The base plate 7 is provided with an outside air inlet 16, and the machine room cover 37 is provided with an exhaust port 38.

In the above configuration, the outside air is supplied to the cooling fan 4.
Is sucked into the condenser 6 through the suction port 16 to cool the condenser 6. Then, it passes through the partition plate 8 and the compressor 3
The compressor 3 is cooled and exhausted from the exhaust port 38 to the outside of the machine room.

[0006]

However, in the above-mentioned conventional construction, the outside air sucked by the cooling fan is once exchanged with the condenser, so that the hot air is supplied to the compressor especially when the ambient temperature of the refrigerator body is high. When the ambient temperature rises, the discharge temperature of the compressor rises, so the temperature of the refrigerant flowing into the condenser also rises, and the condenser itself becomes high in temperature, resulting in insufficient refrigerant condensation capacity. And the load on the compressor is further increased.

As a result, the compressor becomes insufficiently cooled,
Fatal failures such as deterioration of the oil in the compressor, decomposition of the refrigerant, and burning of the motor windings occur as a refrigerator.

Particularly, in a rotary compressor, since the compressor of the refrigerant and the motor winding are very close to each other in order to reduce the size of the compressor, the tendency due to insufficient cooling is remarkable. The problem is that it is not possible to quickly cool the steel.

Therefore, in order to ensure the cooling of the compressor,
There are measures such as increasing the rotation speed of the cooling fan, increasing the outer diameter of the cooling fan, and changing the torsion angle of the blade, but there is a problem that increasing the rotation speed unnecessarily increases fan noise. .

[0010] In recent years, from the viewpoint of reducing power consumption, heat radiation (condensation) in the main body cabinet has been abolished, and a heat exchanger (condenser) disposed in the machine room.
Is shifting to a method that covers condensation. Since the condensing pipe is arranged on the back side of the main body cabinet, the heat radiation due to the condensation of the refrigerant propagates to the inside of the refrigerator and becomes a factor of increasing the temperature in the refrigerator. This is because, due to this factor, the operation time of the compressor becomes longer to cool the inside of the refrigerator, and the total power consumption increases.

In order to cope with this, it is desired to develop a system that combines a heat exchanger and a cooling fan to increase the heat exchange capacity, reduce the load on the compressor, and sufficiently cover the cooling to the compressor. Have been.

At the same time, the current state of treatment of drain water generated in the cooler generally involves means for evaporating the condensed heat of the heat exchanger in a water tray disposed above the heat exchanger (condenser). However, when a heat exchanger and a cooling fan are combined to form a system, the ventilation path from the cooling fan,
Since it is necessary to secure the air volume and the like, the positional relationship between the heat exchanger and the water tray changes, which causes a problem in drain water treatment such that it takes time to evaporate the drain water.

[0013]

SUMMARY OF THE INVENTION The refrigerator according to the present invention has solved the above-mentioned problems. According to the first aspect of the present invention, a refrigerator, a plurality of condensing tubes and fins, and a plurality of condensing tubes are provided in a machine room at a lower portion of a main body. An annular condenser comprising a header tube,
A cooling fan for cooling the compressor and the annular condenser;
A control device for the fan including reverse rotation, and a partition plate for controlling the installation of the fan and a flow of air by the fan are provided, and the annular condenser and the compressor sandwich the cooling fan around the cooling fan. As described above, the central axis of the annular condenser is arranged substantially in line with the central axes of the compressor and the cooling fan.

According to a second aspect of the present invention, one end of the annular condenser according to the first aspect is covered with an air shielding plate to improve air permeability. And the invention of claim 3 is:
A partition plate fixing the cooling fan according to claim 1,
By directly disposing the annular condenser, a part of the cooling fan is formed so as to be incorporated in the annular condenser.

According to a fourth aspect of the present invention, there is provided means for controlling the cooling fan to reverse the wind direction of the cooling fan according to the first aspect. Further, the invention according to claim 5 is provided with means for controlling the cooling fan so as to vary the air volume of the cooling fan according to claim 1.

According to a sixth aspect of the present invention, there is provided an annular condenser according to the first aspect of the present invention, wherein the annular condenser is provided with a detecting means for detecting whether or not dust is accumulated. The control is performed. According to a seventh aspect of the present invention, the dust / dust detecting means according to the fifth aspect is constituted by a device for detecting a pressure on the air inlet side and the air outlet side of the annular heat exchanger. According to an eighth aspect of the present invention, the dust and dust detecting means according to the fifth aspect is constituted by a device for detecting a temperature at an air inlet side and an air outlet side of the annular heat exchanger. According to a ninth aspect of the present invention, there is provided water having a curved surface covering the upper part of the compressor from the top to the side of the annular condenser according to the first aspect, formed of a metal having good heat conductivity or the like. Arrange a saucer, and
A part of the water receiving tray is brought into close contact with the annular condenser.

The invention according to claim 10 is the first invention.
A tank provided with an opening for storing drain water and discharging drain water downward is disposed in the machine room located above the annular condenser described above, and a solenoid valve and a drain are provided at the tip of the opening. A tube serving as a water path is connected, and the tip of the tube is connected to the periphery of the cooling fan.

Further, according to an eleventh aspect of the present invention, there is provided an opening for storing drain water and discharging drain water downward in a machine room located above the annular condenser according to the first aspect of the present invention. An electromagnetic valve and a tube serving as a drain water path are connected to the end of the opening, and the end of the tube is connected to the ultrasonic vibration disposed inside and around the annular condenser. It is connected around the element.

The invention according to claim 12 is the first invention.
Arranging a tank for storing drain water in the machine room of the described invention, a pump is attached to the tank, and a tube serving as a drain water path is connected to a discharge port of the pump;
The outlet of the sprinkler provided at the tip of the tube is directed toward the annular condenser.

The refrigerator according to the present invention has the above-described structure, and the invention according to the first aspect does not impair the condensation in the annular condenser due to the flow of air generated by the cooling fan.
In addition, since the outside air passing through the annular condenser is directly blown to the compressor by the cooling fan, the compressor is efficiently cooled.

According to the second aspect of the present invention, the wind around the condenser can be efficiently passed through the heat exchanger by shielding a part of the annular condenser. Is further improved.

According to the third aspect of the present invention, the annular condenser is directly disposed on the partition plate to which the cooling fan is fixed, and a part of the cooling fan is incorporated inside the annular condenser. With this configuration, the flow of the air generated by the cooling fan flows inside the annular condenser without waste, so that the condensation in the annular condenser and the cooling of the compressor are efficiently performed.

According to a fourth aspect of the present invention, there is provided means for controlling the cooling fan so as to reverse the direction of the wind passing through the annular condenser, and by reversing the flow of air generated by the cooling fan. It is possible to prevent dust, dirt, and the like from adhering to the annular condenser portion, and to prevent a reduction in condensation ability.

Further, according to the fifth aspect of the present invention, by providing means for changing the number of revolutions of the cooling fan, the number of revolutions of the cooling fan is changed to vary the flow of air generated by the cooling fan. It is possible to prevent dust, dirt, and the like from adhering to the annular condenser portion, and to prevent a reduction in condensation ability.

Further, the invention according to claim 6 detects whether dust, dirt, and the like adhering to the annular condensing portion are accumulated, so that even if dust, dirt, etc. adhere to the annular condensing portion. By changing the flow of the air generated by the fan, it is possible to prevent a reduction in the condensation capacity.

According to a seventh aspect of the present invention, as a specific method for detecting dust and dirt adhering to the annular condenser, the pressure of wind at the air inlet side and the air outlet side of the annular condenser is detected. To work.

According to the eighth aspect of the present invention, as a specific method for detecting dust, dirt and the like adhering to the annular condenser, the invention operates by detecting the temperatures of the air inlet side and the air outlet side of the annular condenser. .

According to a ninth aspect of the present invention, a water receiving tray having a curved surface formed of a metal having good heat conductivity or the like is provided from the upper portion to the side surface of the annular condenser and the upper portion of the compressor is provided. The drain water generated in the cooler is evaporated by the heat of condensation in the annular condenser and the heat from the compressor by arranging it so as to cover and making a part of the water receiving tray adhere to the annular condenser. Let it.

Further, according to the tenth aspect of the present invention, a tank provided with an opening for storing drain water and discharging drain water downward is provided in a machine room located above the annular condenser. An electromagnetic valve and a tube serving as a path for drain water are connected to the end of the opening, and the end of the tube is connected to the periphery of the cooling fan to open the electromagnetic valve and allow the drain water to drip to the cooling fan. Then, the drain water is scattered to the annular condenser by the rotation of the cooling fan, and is evaporated by the heat of condensation in the heat exchanger.

Further, according to the eleventh aspect of the present invention, there is provided a tank having an opening for storing drain water and discharging drain water downward in a machine room located above the annular condenser. Then, a solenoid valve and a tube serving as a path for drain water are connected to the end of the opening, and the end of the tube is connected to the inside of the annular condenser and to the periphery of an ultrasonic vibration element disposed around the same. By opening the electromagnetic valve, drain water is dropped around the ultrasonic vibration element, and the ultrasonic vibration element is operated, whereby the drain water is scattered to the annular condenser and evaporated by the heat of condensation in the heat exchanger.

According to a twelfth aspect of the present invention, a tank for storing drain water is provided in the machine room, a pump is attached to the tank, and a tube serving as a drain water path is connected to a discharge port of the pump. By directing the outlet of the sprinkling section provided at the end of the tube to the annular condenser, the pump is operated, so that drain water is scattered from the outlet to the annular condenser, and a heat exchanger is provided. Is evaporated by the heat of condensation in.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a refrigerator according to the present invention will be described below with reference to FIGS. 1 to 16. The same parts as those in the above-mentioned conventional example are denoted by the same reference numerals. First, a first embodiment of the refrigerator of the present invention will be described with reference to FIGS.

1 to 4, in a machine room 2 formed at the lower portion of the refrigerator main body 1, an annular condenser made of a metal having good heat conductivity is provided between a compressor 3 and a cooling fan 4. 5 is arranged such that its central axis is substantially in line with the central axes of the compressor 3 and the cooling fan 4.

The compressor 3 and the annular condenser 5 are connected to the refrigerator body 1
Are fixed directly to a base plate 7 serving as a base by bolts, nuts, screws, and the like. The cooling fan 4 is mounted on a partition plate 8 that divides the inside of the machine room 2.

As shown in FIGS. 2 to 4, the annular condenser 5 is composed of a plurality of condenser tubes 9, fins 10, and opposed header tubes 11. Annular condenser 5
After forming a plurality of condenser tubes 9 in the cut portions of both header tubes 11, they are fixed to a jig to maintain a constant size. After that, the fin 10 is sandwiched between the condenser tubes 9 to form the annular condenser 5 on the jig.

Approximately 620 ° C. with the jig assembled
It is carried into a furnace set to a certain degree, and a part of the fitting part of each part is melted and fixed. Thereafter, the heat exchanger 5 carried out and cooled out of the furnace is curved along the jig to form a 360 ° annular shape including the header tube 11.

A connection pipe 39 is attached to the header pipe 11. By forming the annular shape at 360 °, the header tubes 11 are in a shape close to or close to each other, but between the header tubes 11,
Spacer 1 made of a material with poor heat conductivity such as resin
Work is completed by sandwiching and fixing 2.

The role of the spacer 12 is to hold the header tubes 11 together, and to form a ring-shaped heat exchanger 5 which is curved along the jig, and presses the restoring force to return to the original state. In addition, the header pipe 11 constitutes an inlet and an outlet as a condenser, and when the header pipes 11 are in close contact with each other, heat exchange occurs between the header pipes 11 and a trouble occurs as a condenser. Therefore, the header tube 11 is made of a material having poor heat conductivity such as resin, and also has a role of preventing heat exchange between the header tubes 11. At the same time, it serves as a mounting leg for fixing the annular condenser 5 to the base plate 7.

In the heat exchanger 5, the header tube 11
Is a dead space that is not included in the heat exchange volume because it is not in direct contact with the fins 10, and that the base plate 7 is also a dead space that is harmful to the flow of air exhausted from the heat exchanger 5. By arranging the header tube 11 on the base plate 7 as well, the dead space in the heat exchanger 5 is also concentrated in one place.

FIG. 5 shows a cross-sectional structure of the condenser tube 9. The condenser tube 9 is formed by a flat porous tube, and a triangular truss-like reinforcing rib is formed in each hole. FIG.
W in the middle indicates the width of the condenser tube, and T indicates its thickness. As shown in FIG. 5, the fins 10 fixed between the condenser tubes 9 are formed by meandering a thin aluminum foil at regular intervals, and are disposed in parallel to the condenser tubes 9. It is a thing.

In the above configuration, when the compressor 3 is operated, the cooling fan 4 is operated at the same time.
The outside air is sucked through the inlet 16, passes through the annular condenser 5, passes through the partition plate 8 and the cooling fan 4, and is blown toward the compressor 3.

The air flow from the cooling fan 4 passes through the front surface 9 and the outer peripheral portion of the annular condenser 5 and
, And is discharged into the machine room 2 through the cooling fan 4. The annular condenser 5 is cooled by the flow of air between the fans 10 to condense the refrigerant.

Here, the cooling fan is rotated so as to flow through the annular condenser as a flow of the cooling fan and the compressor. However, if the cooling capacity of the machine room is sufficient, the flow of the wind is compressed. The cooling fan may be rotated so as to flow from the machine side to the annular condenser through the cooling fan.

Next, a refrigerator according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 shows an annular condenser 5 and an air shielding plate 1 showing a second embodiment of the refrigerator of the present invention.
3 shows the configuration of FIG.

As described in the first embodiment of the refrigerator of the present invention, the flow of air by the cooling fan 4 passes through the front opening 13 of the annular condenser 5 and the space 10 between the fans of the annular condenser 5. Then, the air is discharged into the machine room 2 through the cooling fan 4. In this annular condenser 5, the front opening 13 has a lower airflow resistance than the space 10 between the fans.
Since the amount of air passing through the opening increases, heat exchange between the fans 10 is suppressed.

Therefore, the front opening is connected to the air shielding plate 14.
As a result, the cooling air from the cooling fan 4 passes between the fans 10, so that efficient heat exchange can be performed.

Next, a third embodiment of the refrigerator according to the present invention will be described with reference to FIG. FIG. 8 shows the configuration of the heat exchanger and the cooling fan of the refrigerator of the present invention.

As described in the first embodiment of the refrigerator of the present invention, the center axis of the annular condenser 5 and the cooling fan 4
Are arranged in a straight line, but there is a space between the partition plate 8 to which the cooling fan 4 is attached and the annular condenser 5. For this reason, in the flow of the air generated by the cooling fan 4, not all of the air flows into the annular condenser 5 but part of the air leaks from the space to the outside of the annular heat exchanger 5. There is a defect.

To solve this problem, the annular condenser 5 fixed to the base plate 7 is attached to the partition plate 8, and a part of the blades of the cooling fan 4 is inserted into the annular condenser 5. We will deal with it by arranging it.

In mounting the annular condenser 5 to the partition plate 8, a small space a is provided between the condenser tube 9 at one end of the heat exchanger and the partition plate 8. This small space also forms an air flow between the condensing tube 9 at one end and the partition plate 8, assists the condensation at the condensing tube 9 at one end, and allows the air flow to the outside of the annular condenser 5. To prevent a large leak.

Thus, all the flow of the air generated by the rotation of the cooling fan 4 can be guided from the annular condenser 5 to the compressor side.

Next, a fourth embodiment of the refrigerator according to the present invention will be described with reference to FIG. FIG. 9 is a configuration diagram of a means for reversing the wind direction of a cooling fan in a fourth embodiment of the refrigerator of the present invention.

As described in the first embodiment of the refrigerator according to the present invention, the cooling fan 4 is synchronized when the compressor 3 is operated, and at a constant rotation speed and air flow, the annular condenser 5 is rotated.
And the compressor 3 is cooled.

The fine dust contained in the air passes through the radiating fins of the annular condenser by blowing, and is discharged as it is, but the slightly larger ones accumulate in the radiating fins.

However, as shown in FIG. 6, the radiating fins 10 of the annular condenser have a finer pitch of the radiating fins and an increased width of the flat condenser tube in order to increase the heat radiation ability. As a result, the resistance to the flow of air increases, so that it is necessary to increase the air volume in order to blow off the dust accumulated between the radiating fins 10. In the annular condenser 5, since air is blown from the inside to the outside or from the outside to the inside, dust and dirt accumulate inside or outside the annular condenser 5, so that it is blown out to the outside of the annular condenser 5. Further, the air volume needs to be further increased, and the power consumption of the fan motor (see FIG. 8) of the cooling fan 4 increases.

Therefore, the direction of rotation of the cooling fan 4 is reversed to reverse the flow of air. Thereby, the dust and dust accumulated in the annular condenser 5 are sucked into the annular condenser 5,
It accumulates inside or is sucked out and falls into an inlet other than the annular condenser 5.

Thereafter, when returning to normal operation, the flow of air returns to its original state, and a part of the dust is accumulated in the annular condenser 5, but most of the dust is outside the lower gap of the annular condenser 5. And discharged from the back of the cabinet.

The rotation direction of the cooling fan 4 is reversed by reversing the rotation direction of the fan motor 21. If the fan motor 21 is of a DC type, the rotation direction of the cooling fan 4 is reversed by switching the voltage. When the fan motor 21 is of an AC type, switching is performed using an induction motor including a reversible motor or the like.

The switching timing of the flow of the cooling fan 4 is determined by the accumulated operating time of the compressor. Hereinafter, this will be described.

In normal operation, frost has adhered to a cooler (not shown). Since the cooling capacity is reduced by the frost, the operation is switched to a defrosting mode for periodically removing the frost. In the defrost mode, the compressor stops and the refrigeration cycle stops, and the frost attached to the cooler is melted by heating with an electric heater attached to the cooler.

In the defrosting mode, even if the direction of the air blown to the annular condenser 5 changes, it has no effect on the refrigerating cycle. At this time, the rotation speed of the cooling fan is increased to release the radiating fins (see FIG. 5). 10) Blow off the dust and dust adhering during the process. FIG. 8 shows a block diagram of this control type.
The accumulated operation time of the compressor is counted by a timer built in the microcomputer 22, and when a predetermined time is reached, a defrost mode is entered,
When the frost is removed from the cooler, the operation returns to the normal operation.

In a refrigerator without a microcomputer, the same control is performed by a mechanical timer. Switching the operation to the defrost mode according to the accumulated operation time of the compressor is because the operation rate of the compressor fluctuates due to the ambient temperature of the refrigerator and the amount of frost adhering to the cooler fluctuates accordingly. This is to reduce the width and obtain a certain cooling capacity.
Since control is performed based on the accumulated operation time of the compressor in this manner, dust and the like are discharged at an appropriate time without detecting the accumulation state of the dust and the like.

Next, a fifth embodiment of the refrigerator of the present invention will be described. In the fifth embodiment, by varying the air volume, the dust accumulated between the heat dissipating fins is blown off.

By increasing the rotation speed of the fan motor 21, the amount of air generated by the cooling fan 4 increases. In order to increase the rotation speed, the power supply voltage is switched in the case of a DC type. In the case of the AC type, a main winding and an auxiliary winding having different resistances are provided, and the number of rotations changes by switching notches or changing the frequency.

When the air volume increases, the wind speed of the air passing between the radiating fins increases, and the accumulated dust is blown off. For example, during normal operation, the number of rotations of the cooling fan is about 900 rpm in a heat exchange unit in which the number of rotations of the cooling fan is about 600 rpm and an air flow of 1.2 m ³ / min is obtained.
m, the air volume is 2.3 m ³ / mi
n and about twice. As a result, dust accumulated between the heat radiation fins is blown away. Then, similarly to the fourth embodiment, the air volume of the fan is changed using the defrost mode.

Next, sixth and seventh embodiments of the refrigerator of the present invention will be described with reference to FIG. In FIG. 10, the same parts as those in FIG.

Pressure sensors 15 and 17 are attached to the outside (temporary side) and inside (secondary side) of the annular condenser, respectively.
The air pressure on the temporary side and the secondary side of the cooling fan 4 is detected.
When the cooling fan 4 is stopped, the pressure sensor 1
The atmospheric pressure detected by the air conditioners 5 and 17 is equal to the atmospheric pressure around the refrigerator, and there is no pressure difference between the temporary side and the secondary side.

When the cooling fan 4 starts blowing air during normal operation, a pressure difference occurs between the temporary side and the secondary side. This pressure difference is constantly stabilized at a constant value if there is no change in the air volume. The numerical value of the pressure difference is stored in the microcomputer 22 (see FIG. 8) in advance. When the air volume is reduced due to dust or dirt clogging the radiating fins 10 and the numerical value of the pressure difference is changed, the microcomputer 22 detects the pressure with the pressure sensors 15 and 17 and, when the defrost mode is entered, the cooling fan 4. Is controlled to increase the air volume or reverse the wind direction, and the dust accumulated between the heat dissipating fins 10 is discharged.

Next, an eighth embodiment of the refrigerator of the present invention will be described with reference to FIG. In FIG. 11, the same portions as those in FIG.

Temperature sensors 18 and 19 are attached to the outside (temporary side) and inside (secondary side) of the annular condenser, respectively. The temperature detected by each of the temperature sensors 18 and 19 is taken into the microcomputer 22 (see FIG. 9) and controlled. The outside temperature of the annular condenser is equal to the ambient temperature of the refrigerator machine room.

On the other hand, the temperature of the air inside the annular condenser is increased by the heat of condensation when the refrigerant passing through the inside of the condenser 9 is condensed. The temperature difference of the air in this heat exchange is stored in the microcomputer 22 in advance,
When the air volume decreases due to accumulation of dust and dirt, the temperature of the air flowing inside the annular condenser increases, and the temperature difference between the air temperatures detected by the temperature sensors 18 and 19 increases. When the temperature difference exceeds the specified value stored in the microcomputer 22, when the defrost mode is entered, the microcomputer 22 controls the cooling fan 4 to increase the air volume or reverse the wind direction, and to release heat. The dust accumulated between the fins 10 is discharged.

The detection of the air temperature by the temperature sensors 18 and 19 is performed when a certain period of time has elapsed since the compressor started operating and the air temperature near the temperature sensors 18 and 19 has stabilized. The temperature sensor 18 outside the annular condenser is
The outside air temperature sensor 20 (FIG. 1) attached near the suction port
1) can also be used.

Next, a ninth embodiment of the refrigerator of the present invention will be described with reference to FIG. FIG. 12 shows a ninth embodiment of the present invention.
FIG. 13 shows a configuration of a water tray in the embodiment of FIG.
Represents the inside of the machine room.

In the configuration of the first embodiment,
When the annular condenser 5 is disposed in the machine room 2, the treatment of drain water generated in the cooler becomes a serious problem.

In a conventional refrigerator, a means for evaporating with the heat of condensation of the condenser in a water tray disposed above the condenser is generally used. However, in the configuration according to the present invention, this method cannot be used at all. Occurs.

In response to this problem, a water receiving tray 23 having a curved surface formed of a metal having good heat conductivity or the like is provided so as to cover the upper part of the annular condenser 5 from the side and the upper part of the compressor 3. It is arranged and a part of the water receiving tray 23 is brought into close contact with the annular condenser 5 to cope with the problem.

As shown in the figure, the water tray 23 is disposed from the upper portion to the side surface of the annular condenser 5, and the lower portion of the water tray 23 is in close contact with the annular condenser 5 in a pressed state. . At the same time, in the lateral direction of the water tray 23, the compressor 3 is disposed directly below the water tray 23, and a positional relationship is formed such that the water tray 23 covers the compressor 3. Inside the water receiving tray 23, a water absorbing plate 24 made of felt or the like is attached.

The operation based on the above configuration will be described below.

By the defrosting operation of the refrigerator, the frost of the cooler (not shown) is melted and the drain hose 40 is used as drain water.
The water drops on the water receiving tray 23. The drain water is stored in the lower part of the water receiving tray 23, and the drain water which rises to the upper part of the water receiving tray 23 is held by the water absorbing plate 24 to absorb water, and overflows from the water receiving tray 23. Has been prevented. When the defrosting is completed and the refrigerator returns to the normal operation, the compressor 3 is operated and the high-temperature and high-pressure refrigerant flows into the annular condenser 5 and is condensed by the cooling fan 4. By transmitting the heat of conduction and heat transfer in space to the surface of the condenser 5 held by a condenser made of a metal having good heat conductivity of the water tray 23, the drain water in the water tray 23 is discharged. Allow to evaporate. In addition, the exhaust heat generated by the compression of the compressor itself due to the operation of the compressor 3 is also transferred to the one surface of the water tray 23 by heat transfer in space, so that the drain water in the water tray 23 evaporates. Promote.

The drain water that has been absorbed and held by the water absorbing plate 24 is also temporarily moved from the water absorbing plate 24 by the heat described above.
Finally, all of them evaporate, such as being discharged into the inside or evaporating from the water absorbing plate 24 itself.

Next, a refrigerator according to a tenth embodiment of the present invention will be described with reference to FIG. FIG. 14 shows a machine room interior according to the tenth embodiment of the present invention.

As described in the ninth embodiment,
Drain water treatment is an important issue for refrigerators. In order to solve this problem, in the present embodiment, a tank 25 for storing drain water is provided in the machine room 2 located above the annular condenser 5.
Is arranged. The tank 25 is provided with an opening 26 for discharging drain water downward, and an electromagnetic valve 27 and a tube 28 serving as a drain water path are connected to the tip of the opening 26. The distal end of the tube 28 is connected to a discharge port 29 provided around the cooling fan 4.

Hereinafter, the operation based on the above configuration will be described.
By the defrosting operation of the refrigerator, the frost of the cooler (not shown) is dropped into the tank 25 from the drain hose (40) as the drain water in which the frost is melted. The drain water is stored in the tank 25
Will be stored inside.

When the defrosting is completed and the refrigerator returns to the normal operation, the compressor 3 is operated and high-temperature and high-pressure refrigerant flows into the annular condenser 5 and the cooling fan 4 is also operated. 27 is operated to make the drain water drop from the tank 25.

The drain water passes through the tube 28 and is blown out from the discharge port 29 toward the cooling fan 4.
The discharged drain water is scattered into the annular condenser 5 by the rotation of the cooling fan 4. The scattered drain water is evaporated by the heat of condensation of the annular condenser 5.

Next, an eleventh embodiment of the refrigerator according to the present invention will be described with reference to FIG. FIG. 15 shows a machine room interior according to an eleventh embodiment of the present invention.

As described in the ninth embodiment,
Drain water treatment is an important issue for refrigerators. In order to solve this problem, in the present embodiment, a tank 25 for storing drain water is provided in the machine room 2 located above the annular condenser 5.
Is arranged. The tank 25 is provided with an opening 26 for discharging drain water downward, and an electromagnetic valve 27 and a tube 28 serving as a drain water path are connected to the tip of the opening 26. The distal end of the tube 28 is dealt with by forming a structure in which drain water is dripped on a dish 31 provided inside or around the annular condenser 5 and to which the ultrasonic vibration element 30 is attached.

The operation based on the above configuration will be described below.
By the defrosting operation of the refrigerator, the frost of the cooler (not shown) is melted and drained from the drain hose 40 to the tank 2.
5 drops. The drain water is stored in the tank 25.

When the defrosting is completed and the refrigerator returns to the normal operation, the compressor 3 is operated and high-temperature and high-pressure refrigerant flows into the annular condenser 5 and the cooling fan 4 is also operated. 27 is operated to make the drain water drop from the tank 25. The drain water passes through the tube 28 and is guided to the dish 31 to which the above-described ultrasonic vibration element 30 is attached.

The ultrasonic vibration element 30 is operated to scatter the drain water to the annular condenser 5. The scattered drain water is evaporated by the heat of condensation of the annular condenser 5.

The tank 25 is provided with a water level sensor 32 of a float type. When it is detected that the drain water in the tank 25 has run out, the operation of the ultrasonic vibration element 30 is stopped.

Next, a twelfth embodiment of the refrigerator of the present invention will be described with reference to FIG. FIG. 16 shows a machine room interior in a twelfth embodiment of the refrigerator of the present invention.

As described in the ninth embodiment, drain water treatment is an important issue for refrigerators. In order to solve this problem, in the present invention, a tank 33 for storing drain water is provided in the machine room 2, and an electromagnetic pump 34 is attached to the tank 33. The discharge port of the electromagnetic pump 34 is connected to a tube 28 serving as a drain water path, and an outlet 36 of a water sprinkling section 35 provided at the end of the tube 28 is provided toward the annular condenser 5. It is dealt with by the configuration that does.

The operation based on the above configuration will be described below.
By the defrosting operation of the refrigerator, the frost of the cooler (not shown) is dropped into the tank 33 from the drain hose 40 as the drain water in which the frost is melted. The drain water is stored in the tank 33.

When the defrosting is completed and the refrigerator returns to the normal operation, the compressor 3 is operated to flow high-temperature and high-pressure refrigerant into the annular condenser 5 and the cooling fan 4 is also operated. 34 and drain water to tank 3
Suction from 3 and discharge from discharge port. The drain water passes through the tube 28 and is guided to the sprinkling section 35, and is scattered by the outlet 36 to the annular condenser 5. The scattered drain water is evaporated by the heat of condensation of the annular condenser 5.

The tank 33 is provided with a water level sensor 32 of a float type, and when it is detected that the drain water in the tank 33 has run out, the electromagnetic pump 34
Stop the operation of.

In the present embodiment, the electromagnetic pump 34 is used as a means for sending out from the drain water tank 33. However, a similar structure can be formed by a general pump for conveying a fluid by an impeller.

[0098]

According to the refrigerator of the present invention having the above construction, the invention according to the first aspect of the present invention does not impair the condensation in the annular condenser due to the flow of the air generated by the cooling fan and compresses the air. Since the outside air passing through the annular condenser is directly blown by the cooling fan to the machine, it is possible to provide a refrigerator in which the compressor is efficiently cooled.

Further, according to the second aspect of the present invention, by shielding a part of the annular condenser, the wind around the condenser can be efficiently passed through the heat exchanger. Is further improved.

According to the third aspect of the present invention, the annular condenser is directly disposed on the partition plate to which the cooling fan is fixed, and a part of the cooling fan is incorporated inside the annular condenser. With this configuration, the flow of the air generated by the cooling fan flows inside the annular condenser without waste, so that the condensation in the annular condenser and the cooling of the compressor are efficiently performed.

The invention according to claim 4 further comprises means for controlling the cooling fan so as to reverse the wind direction passing through the annular condenser, and reverses the flow of air generated by the cooling fan. Thus, it is possible to prevent dust and dirt from adhering to the annular condenser portion, and to prevent a reduction in condensation ability.

Further, according to the fifth aspect of the present invention, by providing a means for changing the number of revolutions of the cooling fan, the number of revolutions of the cooling fan is changed to vary the flow of air blown by the cooling fan. It is possible to prevent dust, dirt, and the like from adhering to the annular condenser portion, and to prevent a reduction in condensation ability.

Furthermore, the invention according to claim 6 detects whether or not dust or dirt adheres to the annular condensing portion by detecting whether or not dust or dirt accumulates on the annular condensing portion. By changing the flow of the air generated by the cooling fan, it is possible to prevent a reduction in the condensation capacity.

According to a seventh aspect of the present invention, as a specific method of detecting dust and dirt adhering to the annular condenser, the pressure of wind at the air inlet side and the air outlet side of the annular condenser is detected. Can work.

The invention according to claim 8 operates as a specific method for detecting dust and dirt adhering to the annular condenser by detecting the temperatures of the air inlet side and the air outlet side of the annular condenser. be able to.

Further, according to the ninth aspect of the present invention, a water receiving tray having a curved surface formed of a metal having good heat conductivity or the like is provided from the upper portion of the annular condenser to the side surface thereof, and the upper portion of the compressor is provided. The drain water generated in the cooler is evaporated by the heat of condensation in the annular condenser and the heat from the compressor by arranging it so as to cover and making a part of the water receiving tray adhere to the annular condenser. Can be done.

Further, according to the tenth aspect of the present invention, a tank provided with an opening for storing drain water and discharging drain water downward is provided in a machine room located above the annular condenser. An electromagnetic valve and a tube serving as a path for drain water are connected to the end of the opening, and the end of the tube is connected to the periphery of the cooling fan. The drain water can be scattered to the annular condenser by the rotation of the cooling fan, and can be evaporated by the heat of condensation in the condenser. At the same time, the condensing capacity of the annular condenser is slightly increased by the scattered drain water, so that the capacity as a refrigerator is also increased.

Further, according to the eleventh aspect of the present invention, there is provided a tank provided with an opening for storing drain water and discharging drain water downward in a machine room located above the annular condenser. Then, a solenoid valve and a tube serving as a path for drain water are connected to the end of the opening, and the end of the tube is connected to the inside of the annular condenser and to the periphery of the ultrasonic vibration element arranged around the ring condenser. By opening the solenoid valve, the drain water is dropped around the ultrasonic vibrating element, and by operating the ultrasonic vibrating element, the drain water is scattered to the annular condenser and evaporated by the heat of condensation in the heat exchanger. Can be.

At the same time, the condensing capacity in the annular condenser is slightly increased by the scattered drain water, so that the capacity as a refrigerator is also increased.

According to the twelfth aspect of the present invention, a tank for storing drain water is provided in the machine room, a pump is attached to the tank, and a tube serving as a drain water path is connected to a discharge port of the pump. By directing the outlet of the water sprinkling section provided at the tip of the tube to the annular condenser, the pump is operated so that drain water is scattered from the outlet to the annular condenser, and heat exchange is performed. It can be evaporated by the heat of condensation in the vessel. At the same time, the condensing capacity of the annular condenser is slightly increased by the scattered drain water, so that the capacity as a refrigerator is also increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a refrigerator machine room showing a first embodiment of a refrigerator of the present invention.

FIG. 2 is a sectional view showing a main part of a refrigerator machine room of FIG.

FIG. 3 is an enlarged front structural view of a main part of the annular condenser in FIG. 1;

FIG. 4 is an enlarged bottom configuration diagram of a main part of the annular condenser of FIG. 1;

FIG. 5 is a cross-sectional view of a main part of the condenser tube of FIG.

FIG. 6 is a schematic configuration diagram of a fin of the annular condenser of FIG. 1;

FIG. 7 is a configuration diagram of a heat exchanger and an air shielding plate according to a second embodiment of the refrigerator of the present invention.

FIG. 8 is a configuration explanatory view of a heat exchanger and a cooling fan according to a third embodiment of the refrigerator of the present invention.

FIG. 9 is a configuration explanatory view of a wind direction control means showing a fourth and a fifth embodiment of the refrigerator of the present invention.

FIG. 10 is an explanatory view of a configuration of an annular condenser and a pressure detector showing a sixth and a seventh embodiment of the refrigerator of the present invention.

FIG. 11 is an explanatory view showing a configuration of an annular condenser and a temperature detector showing an eighth embodiment of the refrigerator of the present invention.

FIG. 12 is a diagram illustrating a configuration of a water tray according to a ninth embodiment of the refrigerator of the present invention.

FIG. 13 is an explanatory diagram of a configuration of a refrigerator machine room showing a ninth embodiment of the refrigerator of the present invention.

FIG. 14 is an explanatory diagram showing a configuration of a refrigerator machine room according to a tenth embodiment of the refrigerator of the present invention.

FIG. 15 is an explanatory diagram of a refrigerator machine room showing an eleventh embodiment of the refrigerator of the present invention.

FIG. 16 is an explanatory diagram of a refrigerator machine room showing a twelfth embodiment of the refrigerator of the present invention.

FIG. 17 is a perspective configuration diagram of a main part of a refrigerator machine room showing an embodiment of a conventional refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Machine room 3 Compressor 4 Cooling fan 5 Annular condenser 6 Condenser 7 Base plate 8 Partition plate 9 Condenser tube 10 Fin 11 Header tube 12 Spacer 13 Opening 14 Air shielding plate 15 Pressure sensor 16 Suction port 17 Pressure sensor Reference Signs List 18 temperature sensor 19 temperature sensor 20 outside temperature sensor 21 fan motor 22 microcomputer 23 water receiving tray 24 water absorbing plate 25 tank 26 opening 27 electromagnetic valve 28 tube 29 discharge port 30 ultrasonic vibration element 31 dish 32 water level sensor 33 tank 34 electromagnetic pump 35 Water sprinkling part 36 Air outlet 37 Machine room cover 38 Exhaust port 39 Connecting pipe 40 Drain hose

Continued on the front page (51) Int.Cl. ⁶ Identification code FI F25D 21/14 F25D 21/14 A

Claims (12)

[Claims] 1. A compressor in a machine room at a lower portion of a main body, an annular condenser including a plurality of condenser tubes and fins, and an opposed header tube, and a cooling fan for cooling the compressor and the annular condenser. And a control device for the fan including reverse rotation, and a partition plate for controlling the installation of the fan and a flow of air by the fan, wherein the annular condenser and the compressor are arranged around the cooling fan and the cooling fan is provided. Wherein the central axis of the annular condenser is disposed substantially in line with the central axes of the compressor and the cooling fan. 2. The refrigerator according to claim 1, wherein one end of the annular condenser is covered with an air shielding plate. 3. The cooling fan according to claim 1, wherein the annular condenser is directly arranged on a partition plate to which the cooling fan is fixed, and a part of the cooling fan is incorporated in the annular condenser. The refrigerator according to claim 1, wherein the cooling air performs condensation in the annular condenser and cools the compressor. 4. The refrigerator according to claim 1, further comprising means for controlling the cooling fan so as to reverse the wind direction of the cooling fan. 5. The refrigerator according to claim 1, further comprising means for controlling the cooling fan so as to vary the air volume of the cooling fan. 6. A dust and dust detecting means for detecting whether or not dust is accumulated in the annular condenser, and controlling the cooling fan based on the detection output. The refrigerator according to 1. 7. The refrigerator according to claim 5, wherein said dust and dust detecting means is constituted by a device for detecting a pressure at an air inlet side and an air outlet side of said annular heat exchanger. 8. The refrigerator according to claim 5, wherein said dust and dust detecting means is constituted by a device for detecting a temperature at an air inlet side and an air outlet side of said annular heat exchanger. 9. A water tray, which is formed from a metal having good heat conductivity, is provided on one side of a curved surface so as to cover from above to the side of the annular condenser and above the compressor,
In addition, since a part of the water receiving tray is in close contact with the heat exchanger, drain water generated in the cooler is evaporated by heat of condensation in the heat exchanger and heat from the compressor. The refrigerator according to claim 1, wherein 10. A tank provided with an opening for storing drain water in a machine room located above the annular condenser and discharging the drain water downward, and a solenoid valve is provided at the tip of the opening. And a tube serving as a path for drain water is connected, and the end of the tube is connected to the periphery of the cooling fan, so that the compressor operates, and when the cooling fan operates, 2. The refrigerator according to claim 1, wherein the valve is opened, the drain water is dropped, and the drain water is guided to the cooling fan. 11. A tank provided with an opening for storing drain water in a machine room located above the annular condenser and discharging the drain water downward, and a solenoid valve is provided at a tip of the opening. By connecting a tube that serves as a path for drain water, the end of the tube is connected to the periphery of the ultrasonic vibration element disposed inside and around the annular condenser, so that the compressor operates. And, when the cooling fan is operated, the solenoid valve is opened, drain water is dropped and guided around the ultrasonic vibrating element, and the ultrasonic vibrating element is operated so that the drain water is scattered to the annular condenser and condensed 2. The refrigerator according to claim 1, wherein the refrigerator is heated to evaporate. 12. A tank for storing drain water is provided in the machine room, a pump is attached to the tank, a tube serving as a drain water path is connected to a discharge port of the pump, and a tip of the tube is connected to the end of the tube. The provided water sprinkling section is disposed inside and around the annular condenser, and the outlet of the water sprinkling section faces the annular condenser, whereby the compressor operates and the cooling fan operates. 2. The refrigerator according to claim 1, wherein, when the pump is operated, the drain water is scattered to the annular condenser at the outlet of the water sprinkling section and evaporated by heat of condensation.