KR20060087520A - Refrigerator - Google Patents

Abstract

A refrigerator, comprising a machine room (14) formed at the rear lower part of a refrigerator body, a refrigerant compressor (12) installed in the machine room (14) at a position displaced to the lateral one side and a cooler (9) receiving refrigerant from the refrigerant compressor (12) to cool the inside of a storage chamber. The cooler (9) is disposed on the inside of the refrigerator through a body insulation wall (3a) above the refrigerant compressor (12) disposed on one side of the machine room (14) and at the laterally opposite side of the refrigerant compressor (12), and characterized in that the control and power substrates (21) of the refrigerator are disposed in the other laterally wide space for the refrigerant compressor (12) in the machine room (14). By changing the positional relation between the cooler (9) and the refrigerant compressor (12) and between the control and power substrates (21) and the structures thereof, the thermal loss of the cooler (9) can be reduced, insulation efficiency can be increased, and the heat radiating efficiencies of the machine room (14) and a condenser (13) can be increased to provide power saving effects.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to an improvement in the arrangement of a refrigerant compressor and a cooler in a machine room of a refrigerator, in particular a refrigerator.

In the conventional refrigerators, electric power reduction is being progressed by various measures and improvements. However, in recent years, a reduction in power consumption is expected to be increasingly strong in view of resource environment.

On the other hand, as shown in FIGS. 9 and 10, the refrigerant compressor 42 constituting the refrigeration cycle of the conventional refrigerator has a width direction in the machine room 44 formed in the lower rear side of the refrigerator main body 31. A refrigeration cooler 38 and a refrigeration cooler 39 which are installed in a central portion and generate cool air for receiving the refrigerant from the compressor 42 and cooling the refrigerating space 35 and the freezing space 37 which are storage chambers. Was arranged in the center part of the upper side inside of the heat insulation cabinet facing the compressor 42. The control and power supply board 51 was configured to be disposed on the outer surface of the heat insulation wall 33 at a position opposite to the refrigeration cooler 38 on the rear surface of the heat insulation cabinet (for example, JP 2003-65658 A). number).

In addition, as shown in Figs. 11 and 12, the mounting efficiency of the machine room is increased, and the effective inner space of the refrigerator is increased. A recess is formed by recessing a part of the lower rear portion of the refrigerator main body, and the machine room is formed in the recess. Comprising 74, the compressor 72 is accommodated, the cooler 69 is provided in the inner side adjacent to the compressor 72, and the electronic control board (60) is provided on the back of the cooler 69 via a heat insulating wall 63. 81) and Japanese Patent Laid-Open No. 2001-41635, as shown in FIG. 13, to improve the space utilization efficiency and cooling efficiency without impairing hygiene. Similarly to the arc, the compressor 102 is formed by forming a recess in one side of the machine room 104 in the width direction, and the cooler 99 is disposed at a position adjacent to the compressor 102 via a heat insulating wall. Also adjacent to compressor 102 Installing a condenser and a drain hose into the machine room 104, and the configuration was (Japanese Laid-Open Patent Publication No. 2002-130922) placing the evaporating dish 83 in the bottom lower part of the front body of the compressor (102).

However, in the configuration of Japanese Laid-Open Patent Publication No. 2003-65658, the refrigeration and freezing coolers 38 and 39, which are low temperature endothermic bodies, and the refrigerant compressor 42 or the heating element control and power supply board 51, which are high temperature members, are used. As the positional relationship becomes closer, thermal leakage occurs in each cooler due to heat leakage, and it is difficult to secure the required insulation wall thickness, and heat leakage from the refrigerant compressor 42 or the control power supply board 51 to the inside of the storage compartment is prevented. There was a drawback that the cooling efficiency is lowered at the point of increase.

In addition, since the refrigerant compressor 42 is located almost at the center of the main body width direction, the air into the upstream machine room 44 from the partition plate 48 to which the heat dissipation cooling fan 49 provided on the side of the compressor is attached. The inlet port 50 was narrow in width, and the heat exchange area of the flat air condenser 43 disposed on the bottom surface of the main body and the outside air introduced from the main body front opening 31b was very small, resulting in low heat dissipation efficiency.

Moreover, the structure of Unexamined-Japanese-Patent No. 2001-41635 aims at the space efficiency of a machine room. As with Unexamined-Japanese-Patent No. 2003-65658, the distance of the compressor 72 and the cooler 69 which are heat sources is short, and Since the control board 81 is disposed on the rear surface of the cooler 69, the heat loss of the cooler 69 due to heat leakage occurs in the same manner as in Japanese Patent Laid-Open No. 2003-65658 and the heat insulation wall thickness is reduced. Securing becomes difficult, which causes the same problem in the same point in the point that the cooler and the heating element are close to each other even in the structure of JP 2002-130922 A.

The present invention has been made in view of the above points, and by changing the arrangement or structure of the cooler, the refrigerant compressor, the control and the power supply board, the heat loss efficiency of the cooler can be reduced and the heat insulation efficiency of the machine room or the condenser can be improved. It aims at providing the refrigerator which can raise power saving effect.

The invention of the refrigerator of claim 1 to solve the above problems is a machine chamber formed in the lower rear of the refrigerator main body, a refrigerant compressor installed in one side of the width direction in the machine chamber, and receives the refrigerant from the refrigerant compressor to cool the storage compartment And a cooler, wherein the cooler is disposed inside the refrigerator via a heat insulating wall of the main body above the refrigerant compressor disposed at one side of the machine chamber, and is positioned at a position opposite to the compressor in the width direction, and controls the refrigerator. The power supply board is disposed in a wide space on the other side of the refrigerant compressor in the width direction in the machine room.

In addition, the invention of the refrigerator of claim 5 comprises a machine chamber formed in the lower rear side of the refrigerator main body, a refrigerant compressor installed in the machine chamber, and a control and power supply board of the refrigerator disposed in the lateral space of the refrigerant compressor in the machine chamber. The control and power supply boards are divided into two front and rear stages and overlapped with each other.

With the above configuration, the cooler can maintain a sufficient heat insulation distance space with a high temperature member such as a refrigerant compressor, thereby preventing heat leakage in that the heat loss is reduced and a predetermined heat insulation wall thickness can be secured as the heat insulation cabinet. It can contribute to the reduction of power consumption by increasing the heat dissipation efficiency of the machine room or condenser.

According to the present invention, the control and power supply boards can be compactly mounted in the space of the machine room with low ceiling height, and the thickness of the heat insulation wall on the rear surface of the freezer compartment can be ensured.

By reference to the following detailed description considered in connection with the following figures, more and more values of the present invention and many advantages obtained in conjunction with it will be better understood.

1 is a longitudinal sectional view of a refrigerator showing one embodiment of the present invention;

2 is a perspective view of the refrigerator of FIG.

3 is an enlarged rear view of the machine room part in FIG. 2;

4 is an enlarged cross-sectional view of the machine room part in FIG. 2;

5 is a perspective view from the front of the machine room part shown in FIG. 3;

6 is a circuit diagram showing an embodiment of the control and power supply board of the present invention;

7 is a perspective view showing the configuration of the control and power board in FIG.

8 is a longitudinal cross-sectional view of the control and power supply substrate shown in FIG. 7;

9 is a longitudinal sectional view showing a conventional refrigerator;

10 is a rear view of FIG. 9;

11 is a rear view showing a machine room of another conventional refrigerator;

12 is a longitudinal sectional view of FIG. 11 and FIG.

FIG. 13 is a longitudinal cross-sectional view showing a rear lower part of another conventional refrigerator. FIG.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing. In addition, the same code | symbol is attached | subjected to the same component over the conductive surface.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described based on drawing. The refrigerator main body 1 which shows the longitudinal cross-sectional view in FIG. 1, and the perspective view from the distribution in FIG. 2 has a storage space by the inner box 4 which installed in the inner surface of the outer box 2 via the heat insulation wall 3. It forms, and it divides into several storage rooms, such as the refrigerator compartment 5, the vegetable compartment 6, and the freezer compartment 7, by the partition wall.

Each storage compartment is cooled and maintained at a predetermined set temperature by the refrigerating cooler 8, the freezing cooler 9, and the fans 10 and 11 arranged in each of the refrigerating and freezing spaces. ) Is supplied with the refrigerant by the operation of the refrigeration cycle consisting of the refrigerant compressor 12, the condenser 13 and the like.

The refrigerant compressor 12 in the refrigeration cycle is installed in the machine room 14 formed in the lower rear side of the refrigerator main body 1, and is attached to the comparator 15 provided over the width direction of the main body via a cushioning body. It is.

The condenser 13 is formed by flattening wires as heat radiating fins on the upper and lower surfaces of the meandering coolant tube, and is disposed almost in front of the bottom space of the refrigerator main body 1 in front of the machine room 14. The refrigerant from the refrigerant compressor 12 receives the high temperature and high pressure refrigerant gas and radiates it to condense. The refrigerant from the condenser 13 passes through a capillary tube, which is a pressure reducing tube, in the refrigerating cooler 8 or the freezing cooler 9 in each storage compartment. ), And the inside of the storage compartment is cooled to a predetermined air temperature by evaporation.

And the machine room 14 forms the step part 16 which protrudes toward the freezing chamber 7 side in the lower part of the back surface of the main body, as shown in the back view of the main part in FIG. 3, and the longitudinal cross-sectional view in FIG. 16) to form a space having a depth and height across the width direction, and the refrigerant compressor 12 is provided in one side of the width direction of the space of the machine room 14, the width of the other from the compressor The wide space side is in communication with the body bottom space in which the flat condenser 13 is provided as the heat dissipation duct 17.

In the vicinity of the refrigerant compressor 12 in the heat dissipation duct 17, a partition plate 18 for separating the inside of the machine room 14 in the width direction is provided, and a cooling fan 19 is formed in the bell mouse formed on the partition plate surface. Is attached.

With the above configuration, the air inlet 20 from the condenser 13 arranged on the bottom of the main body to the heat dissipation duct 17 of the machine room 14 is, as shown in FIG. 5, a refrigerant biased toward one side of the machine room 14. Since a large width is obtained between the position of the partition plate 18 with the cooling fan 19 in the vicinity of the compressor 12 and the main body side wall 1a, the inlet opening can be enlarged as compared with the prior art. By the said expansion width, the heat exchange area with respect to the flat condenser 13 of inflow air is markedly widened as shown by the arrow, and heat dissipation efficiency can be improved.

In the back opening of the machine room 14 which forms the heat radiation duct 17, the plate-shaped control and the power supply board 21 which control operation | movement of a refrigerator are arrange | positioned. As shown in FIG. 4, the control and power supply board 21 is divided into two pieces, overlapped with each other and installed on the rear surface of the space of the machine room 14, and the individual heights are changed to form a low board height 21a. It is located inside the space, and a high substrate 21b is disposed along the inclined portion 16a formed in the upper part of the opening of the rear end 16 of the freezing chamber 7.

As can be understood from the circuit diagram shown in Fig. 6, the noise filter circuit 24, rectifier circuit 25, or switching power supply circuit composed of a high voltage and relatively large components are included in the substrate 21a having a low height. (26) and the like, and the high-thick substrate 21b is equipped with an inverter switch unit 27 capable of low pressure and high density mounting, a motor control unit 28 of a refrigerant compressor, and a refrigerator control unit (not shown).

At this time, the switching power supply 26 in the board | substrate 21a with a low height makes the primary ground 26a of a control winding and the motor control power supply winding 26b non-common, and is insulated from the A part. .

Further, the B portion, which is the ground of the motor control on the high substrate 21b, and the C portion, which is the ground of the inverter switch portion 27, are connected at one point, and the motor control portion 28 is connected by three shunt resistors. The three-phase winding resistance is detected and the motor of the refrigerant compressor 12 is driven by vector control.

Usually, such a circuit board is comprised by one board of about 200 mm x 300 mm, and a switching power supply is a non-isolated type, and a circuit is knitted. However, since the board space is an invalid volume in the refrigerator, it is considered to divide into two to increase the space efficiency. However, when the board space is divided into a high pressure side board composed of large parts and a low pressure side board capable of high density mounting, the high pressure side board is used. In the switching power supply circuit, which is formed on the non-isolated type on the circuit, when the control winding of the switching power supply circuit and the motor control power supply are common to reduce the number of windings, the ground of the motor control on the low voltage side board and the ground of the inverter switch unit can be connected. none.

As a result, current detection accuracy is lowered, and operation performance and noise resistance are weakened. However, according to the above configuration, the rectifier circuit 25, the switching power supply circuit 26, which is a high voltage side circuit, and the inverter which is a low voltage side circuit. Even when the switch portion 27 or the motor control portion 28 is divided into two substrates 21a and 21b, the rectifying circuit 25 uses the switching transformer as an insulating type in the substrate 21a having a low height on the high voltage side. The ground 26b of the motor control winding of the switching power supply section 26 is disconnected, and the ground of the inverter switch section 27 and the motor control section 28 are used for the substrate 21b having a high height on the low pressure side. Since the grounded ground is connected, the internal noise performance can be enhanced, the current detection accuracy for driving the inverter can be ensured, and the motor can be driven stably.

The two-divided control and power supply boards 21a and 21b are positioned as guide protrusions in the barrel-shaped container 29 shown in Fig. 7, and have a low height board composed of relatively large components such as a power circuit. 21a is disposed inside the space of the machine room 14 as viewed from the rear side, and the high-strength board 21b into which the circuit component capable of high-density mounting at low pressure, such as a microcomputer peripheral circuit, is inserted. It is arrange | positioned on the outer side of the inside, and the back opening part of the container 29 is sealed by the cover body 30 so that a foreign material may not enter.

At this time, the bottom position of the board | substrate 21a with the low height on the high voltage side is provided so that it may become a position higher by h than the bottom of the board | substrate 21b with high height, as shown in FIG. Even when water or foreign matter enters the part and is deposited from the lower surface of the container 29, the influence on the control board is such that the deposit quality first reaches the lower pressure side circuit board 21b at the lower level and becomes a malfunction first. Instead of reaching the high-pressure side substrate 21a disposed at a high position, it is possible to reduce the possibility of reaching a safety failure such as ignition.

In addition, a high voltage circuit may be arranged on the substrate 21b on the low voltage circuit side in terms of the circuit layout. In this case, the high voltage circuit may be disposed above the low voltage circuit to have the same effect as described above.

In addition, by placing the substrate 21a on the high pressure side inside the machine room 14 rather than the substrate 21b on the low pressure side, the substrate 21a on the high pressure side is covered on the back surface of the substrate 21b having a high height. Even if the user inadvertently touches the control board part, the possibility of contact with the high voltage circuit is reduced, so that a safe configuration can be achieved, and the difference between the heights of the substrates 21a and 21b and the overlapping arrangements before and after As a result, an inclined surface can be formed on the upper surface of the machine room 14, and there is an advantage that an effective storage space can be formed through the heat insulation wall inside the high chamber.

As a result, the control and power supply board 21 can be compactly attached to the space of the machine room 14 having a low ceiling height, and the heat insulation wall thickness on the rear surface of the freezing chamber 7 can be secured.

In the heat dissipation duct 17 formed between the inside of the control and power supply board 21 and the step portion 16 on the rear side of the freezer compartment, an inductor 22, which is an electric component for improving power factor and also a heating element, is provided. The heat flowing through the inside is encouraged.

Below the heat dissipation duct 17, the evaporation plate 23 which receives the defrost water from the cooler 9 and evaporates it is provided. Since the evaporation plate 23 requires the storage capacity assuming the maximum amount of defrosting, the entire bottom face of the heat dissipation duct 17 is used, and the end portion thereof extends beyond the partition plate 18 in the width direction, The volume is enlarged by extending to the vicinity of the refrigerant compressor 12, and a part of the discharge pipe from the compressor 12 is extended into the dish to be immersed in water to promote the evaporation of the defrost water by the high temperature refrigerant. have.

For this reason, the lower end of the partition board 18 with the cooling fan 19 is bent in the horizontal direction to be fixed to the comparator 15, and the evaporation plate 23 is arranged below the bent portion.

By this, it sucks in from the lower opening of the front part of the refrigerator main body 1, heat-exchanges with the flat-plate condenser 13, and almost passes through, and reaches the heat radiating duct 17 from the air inlet 20. One air flows around the refrigerant compressor 12 by the cooling fan 19 to cool it, but the heat is exchanged from the upstream to the downstream of the fan 19 upstream to the evaporation plate 23 in the heat dissipation duct 17. The evaporation of the defrost water from the upper surface opening of the evaporation plate 23 can be performed more efficiently by the flow of.

Regarding the machine room configuration, the refrigeration cooler 9 is widthwise from the compressor 12 inside the refrigerator via the heat insulating wall 3a above the refrigerant compressor 12 disposed on one side of the machine room 14. It arrange | positions so that it may be located on the opposite side, and heat distance is reduced by reducing the distance from the refrigerant | coolant compressor 12 which becomes especially high temperature among machine room storage parts, and the heat loss to cooling is reduced.

In addition, the refrigeration cooler 8 is provided in the back part of the refrigerating chamber 5 above the refrigeration cooler 9. 9, the control and power supply board 51 was arrange | positioned on the outer wall surface of the refrigeration cooler 38. As shown in FIG. In the present embodiment, the control and power supply boards 21 are installed in the machine room 14 as described above, so that the control and power supply boards 21 are also present in the refrigerating cooler 8 in the same manner as the freezing cooler 9. It is not affected by the decrease in insulation thickness.

When the refrigerator is operated according to the above configuration, the refrigerant compressor 12 delivers the refrigerant to the refrigeration cycle, and effectively separates it from the heat generating members such as the refrigerant compressor 12, the control and power supply board 21, the inductor 22, and the like. Each of the storage compartments is cooled by the refrigeration and freezing coolers 8 and 9 arranged so as not to be affected by heat.

In addition, about the condenser 13 which receives the high-temperature gas refrigerant from the refrigerant compressor 12, the partition board 18 and the main body side wall for the cooling fan 19 arrange | positioned in the vicinity of a compressor by the refrigerant compressor 12 which was offset | deviated. By the wide air inlet 20 formed between (1a), the heat exchange area with respect to the flat surface of the said condenser 13 of the outside air which flows in from the main body front opening 1b can be taken large, and the heat dissipation effect is improved. Can be improved.

In the machine room 14, the space of the heat dissipation duct 17 can be largely occupied by the refrigerant compressor 12 and the partition plate 18 of the cooling fan, which are disposed on one side, and the control and power supply that are compactly installed on the distribution. The substrate 21 can form an effective heat dissipation duct path.

This application is claimed based on the benefit of priority of Japanese Patent Application No. 2003-301550 for which it applied on August 26, 2003, and Japanese Patent Application No. 2003-330754 for which it applied for September 22, 2003. The entire contents of these Japanese patent applications are incorporated in the present disclosure by reference.

Since it is apparent that various other embodiments can be made without departing from the spirit and scope of the invention, the invention is not limited to the specific embodiments thereof except as defined in the appended claims.

According to the present invention, the arrangement of the components in the machine room can be compact, and can be used for a refrigerator that contributes to electric power saving in which heat exchange efficiency, heat radiation efficiency, and heat insulation efficiency are improved.

Claims (9)

A machine chamber formed at the bottom of the rear surface of the refrigerator main body, a refrigerant compressor installed in one side of the width direction in the machine chamber, and a cooler that receives the refrigerant from the refrigerant compressor and cools the storage chamber, wherein the cooler is disposed at one side of the machine chamber. On the inside of the high space through the heat insulating wall of the main body above the refrigerant compressor, and in the position opposite to the refrigerant compressor in the width direction, and the control of the refrigerator and the power supply board other than the refrigerant compressor in the width direction in the machine room. Refrigerator characterized in that placed in the wide space of the side. The method of claim 1, The heat exchange duct from the flat plate condenser provided in the main body bottom part at the other wide space side of the said refrigerant | coolant compressor which was offset, and the in-duct blower fan is installed in the vicinity of the said refrigerant | coolant compressor of the said heat radiation duct, It is characterized by the above-mentioned. Refrigerator. The method of claim 2, A refrigerator, characterized in that the opening width on the side opposite to the refrigerant compressor is the air inlet from the condenser from the partition plate which partitions the inside of the machine room with the blowing fan in the width direction. The method of claim 2 or 3, A refrigerator comprising: a control and a power supply board, and / or an electric component that is a heating element in a heat exchange relationship with air circulating through the heat dissipation duct. It consists of the machine room formed in the lower back of the refrigerator main body, the refrigerant compressor installed in the machine room, and the control and power board of the refrigerator arranged in the lateral space of the refrigerant compressor in the machine room. The refrigerator characterized by being divided into and overlapped, the height is shortened and installed in the heat dissipation duct. The method of claim 5, wherein Of the control and power supply boards divided into two stages, the one side is a high voltage circuit board and the other is a low voltage circuit board, and the bottom position of the high voltage circuit board is arranged to be higher than the bottom position of the low voltage circuit board. Refrigerator, characterized in that. The method of claim 6, The switching transformer on the high voltage side board is an insulated type, and the ground of the rectifier circuit and the ground of the motor control winding of the switching power supply unit are disconnected. Refrigerator, characterized in that. The method according to claim 5 or 6, Of the control and power supply boards that are divided into two front and rear stages so that the height is different from each other, the board having the higher height is along the inclined portion toward the outside of the heat insulation wall near the rear opening of the machine room and the height is lower. The board | substrate of which was arrange | positioned inside a machine room, The refrigerator characterized by the above-mentioned. The method according to any one of claims 1 to 8, A refrigerator comprising: an evaporating plate provided on a heat dissipation duct part opposite to a refrigerant compressor installed on one side in the width direction of a comp table attached to a bottom part in a machine room.

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