JP2021076323A - refrigerator - Google Patents

Abstract

To provide a refrigerator capable of securing heat insulation property of a board storage case even under a thin wall.SOLUTION: A refrigerator comprises: a refrigerator body with a storage chamber; a machine chamber provided on the back side of the refrigerator body; a power board that is arranged in the machine chamber and supplies power to a compressor; a control board arranged in the storage chamber; and a control board storage case that houses the control board. The control board storage case is arranged apart from the inner box of the refrigerator body with an air insulating layer in between.SELECTED DRAWING: Figure 25

Description

The present invention relates to a refrigerator.

Patent Document 1 describes a substrate accommodating portion provided on the back surface of the refrigerating chamber and accommodating an electronic substrate.

Japanese Unexamined Patent Publication No. 2006-153350

In recent years, due to the thinning of the wall of the box, there is an increasing risk that the installation of the vacuum heat insulating material will be restricted or the flow of the foamed heat insulating material will be hindered if the structure is arranged inside the box. ing. However, when the substrate storage portion is provided between the inner box and the outer box such as the back of the storage chamber, it is desirable to insulate the substrate storage portion from the inner box when there is a heat source or a cold heat source in the vicinity of the substrate storage portion. For example, the refrigerant pipe (suction pipe) connecting the evaporator and the compressor has a low temperature, so that it can be a cold heat source. However, even if a vacuum heat insulating material or a foam heat insulating material is arranged as the heat insulating structure, it is difficult to perform under the thin wall structure.

The present invention made in view of the above circumstances
Refrigerator body with storage room and
A machine room provided on the back side of the refrigerator body and
The control board arranged in the storage chamber and
A control board storage case for accommodating the control board is provided.
The control board storage case is a refrigerator characterized in that it is arranged apart from the inner box of the refrigerator body with an air heat insulating layer interposed therebetween.

It is a vertical sectional view when the refrigerator of this embodiment is seen from the side. It is a schematic sectional view at the time of cutting along line II-II of FIG. It is a perspective view which shows the back surface of the refrigerator of this embodiment. It is a rear view which shows the machine room of this embodiment. It is a rear view which shows the state which removed the substrate storage case from the machine room shown in FIG. It is a perspective view which shows the internal structure of a machine room. It is a top view which shows the inside of the board storage case. It is a top view which shows the state which removed the power system board from the state of FIG. FIG. 7 is a sectional view taken along line IX-IX of FIG. It is a perspective view which shows the substrate storage case which removed the lid body. It is a perspective view which shows the state which closed the cord holding lid from the state of FIG. It is an arrow view in the XII direction of FIG. It is the XIII direction arrow view of FIG. It is a schematic sectional view at the time of cutting by the XIV-XIV line of FIG. It is a perspective view which shows the modification of the power system board storage case. It is a front view which shows the refrigerating room. It is a perspective view of the refrigerating room as seen from the front. It is a block diagram which shows the structure of a refrigerator. It is an exploded perspective view which shows the control board storage case and its lid. It is a perspective view which shows the state which opened the lid of the cord storage part of the control board storage case. FIG. 20 is a perspective view when viewed from the back side. It is a perspective view when the cord pull-in member is seen from the front side. It is a perspective view when the cord pull-in member is seen from the rear side. It is a perspective view when the refrigerating room is seen from the back. FIG. 17 is a cross-sectional view taken along the line XXIV-XXIV of FIG. FIG. 6 is a schematic cross-sectional view taken along the line XXVI-XXVI of FIG. It is a perspective view of the back surface and the right side surface of the refrigerator with the machine room cover attached.

Hereinafter, the refrigerator of the present embodiment will be described with reference to the drawings. In the following, the description will be made with reference to the directions shown in FIGS. 1 and 2.

FIG. 1 is a vertical cross-sectional view of the refrigerator of the present embodiment as viewed from the side.

As shown in FIG. 1, the box body (refrigerator body, heat insulating box body) 10 of the refrigerator 1 has a refrigerating room 2 from above, an ice making room 3 and an upper freezing room 4 attached to the left and right, a lower freezing room 5, and a vegetable room. It has storage chambers in the order of 6. Further, the refrigerator 1 includes a rotary refrigerating room door 2a that opens and closes the front opening of the refrigerating room 2. Further, the refrigerator 1 includes a pull-out type ice making chamber door 3a, an upper freezing chamber door 4a, and a lower freezing chamber door 5a that open and close the front openings of the ice making chamber 3, the upper freezing chamber 4, the lower freezing chamber 5, and the vegetable compartment 6, respectively. It is equipped with a vegetable compartment door 6a. Hereinafter, the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 are collectively referred to as a freezing chamber 7.

The freezing chamber 7 is basically a storage chamber in which the inside of the refrigerator is set to a freezing temperature range (less than 0 ° C.), for example, about -18 ° C. on average. The refrigerating room 2 and the vegetable room 6 have a refrigerating temperature range (0 ° C. or higher). For example, the refrigerating room 2 has an average temperature of about 4 ° C. and the vegetable room 6 has an average temperature of about 7 ° C. is there.

The refrigerating chamber 2, the upper freezing chamber 4, and the ice making chamber 3 are separated by a heat insulating partition wall 28. The lower freezing room 5 and the vegetable room 6 are separated by a heat insulating partition wall 29. Further, on the front side of each storage chamber of the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5, the inside of the freezing chamber 7 is formed through the gap between the ice making chamber door 3a, the upper freezing chamber door 4a, and the lower freezing chamber door 5a. The heat insulating partition wall 30 is provided so that the air does not leak to the outside of the refrigerator and the air outside the refrigerator does not enter each storage chamber.

The box body 10 of the refrigerator 1 is formed by filling a heat insulating material R (for example, urethane foam) between the outer box 10a made of steel plate and the inner box 10b made of synthetic resin, so that the box body 10 can be placed outside the refrigerator 1. The inside of the refrigerator is separated. The heat insulating material R is formed by injecting and foaming a foamed heat insulating material made of hard urethane foam.

Further, in the box body 10, in addition to the heat insulating material R, a plurality of vacuum heat insulating materials 25 are mounted between the outer box 10a and the inner box 10b. That is, the vacuum heat insulating material 25 is provided on the back side, the ceiling side (not shown), the left side surface side (not shown), the right side surface side (not shown), and the bottom surface side (not shown) of the box body 10.

The freezing chamber 7 includes a container 4b that is pulled out integrally with the upper freezing room door 4a, a container 5b that is pulled out integrally with the lower freezing room door 5a, and a vegetable room container 6b that is pulled out integrally with the vegetable room door 6a.

Further, on the back of the refrigerating chamber 2, a refrigerating chamber side evaporator 14a (evaporator) is provided in the refrigerating chamber side evaporator chamber 8a. The air that has become cold due to heat exchange with the refrigerator room side evaporator 14a is refrigerated through the refrigerating room duct 11 and the refrigerating room discharge port 11a by the refrigerating room side fan 9a provided above the refrigerating room side evaporator 14a. The air is blown into the room 2 to cool the inside of the refrigerating room 2. The air blown to the refrigerating chamber 2 returns to the refrigerating chamber side evaporator chamber 8a from the refrigerating chamber return port 15a, and is cooled again by the refrigerating chamber side evaporator 14a.

Further, a chilled chamber 2b in which the indoor temperature is maintained at 0 ° C. is provided at the lowermost stage of the refrigerating chamber 2. A shelf member 2c is provided above the chilled chamber 2b so as to cover the entire upper part of the chilled chamber 2b. The shelf member 2c is screwed to the inner box 10b, the refrigerating chamber duct 11, or the like so that the user cannot remove it without permission. Further, the refrigerating chamber 2 is provided with a plurality of shelf members 2d whose height positions can be changed.

Further, on the back of the freezing chamber 7, a freezing chamber side evaporator 14b (evaporator) is provided in the freezing chamber side evaporator chamber 8b. The air that has become cold due to heat exchange with the freezer room side evaporator 14b is passed through the freezing room air passage 12 and the freezing room discharge port 12a by the freezing room side fan 9b provided above the freezing room side evaporator 14b. Blow air into the freezing chamber 7 to cool the inside of the freezing chamber 7. The air blown to the freezing chamber 7 returns from the freezing chamber return port 17 to the freezing chamber side evaporator chamber 8b, and is cooled again by the freezing chamber side evaporator 14b.

In the refrigerator 1 of the present embodiment, the vegetable compartment 6 is also cooled by the air cooled by the evaporator 14b on the freezing chamber side. The air in the freezer chamber 8b, which has become cold in the freezer side evaporator 14b, is passed through the vegetable compartment air passage (not shown) and the vegetable chamber damper (not shown) by the freezing chamber side fan 9b. Blow air into the room 6 to cool the inside of the vegetable room 6. When the vegetable compartment 6 has a low temperature, the cooling of the vegetable compartment 6 is suppressed by closing the vegetable compartment damper. The air blown to the vegetable compartment 6 returns from the cold air return portion 18a on the vegetable compartment side provided in front of the lower portion of the heat insulating partition wall 29 to the lower portion of the evaporator chamber 8b on the freezing chamber side via the vegetable compartment cold air return duct 18. ..

A refrigerating room temperature sensor 41, a freezing room temperature sensor 42, and a vegetable room temperature sensor 43 are provided on the back side of the refrigerator compartment 2, the freezing chamber 7, and the vegetable compartment 6, respectively. A refrigerating room side evaporator temperature sensor 40a is provided above the refrigerating room side evaporator 14a, and a freezing room side evaporator temperature sensor 40b is provided above the freezing room side evaporator 14b. These sensors 41, 42, 43, 40a, 40b (hereinafter collectively referred to as sensors 40) are of the refrigerating chamber 2, the freezing chamber 7, the vegetable chamber 6, the refrigerating chamber side evaporator 14a, and the freezing chamber side evaporator 14b. Detect temperature. As another sensor, a door sensor (not shown) for detecting the open / closed state of each door 2a, 3a, 4a, 5a, 6a is provided.

FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG.

As shown in FIG. 2, a defrost heater 21 for heating the freezer chamber side evaporator 14b is provided below the freezer chamber side evaporator chamber 8b. The defrost heater 21 is, for example, an electric heater of 50 W to 200 W, and in this embodiment, a radiant heater of 150 W is used. The defrosted water (melted water) generated during the defrosting of the freezer room side evaporator 14b falls on the toy 23b provided at the bottom of the freezer room side evaporator room 8b, and passes through the drain port 22b and the freezing drain pipe 27b. It is discharged to the evaporating dish 33 provided on the upper part of the compressor 24.

Further, the defrosted water generated during the defrosting of the refrigerating room side evaporator 14a falls on the toy 23a provided in the lower part of the refrigerating room side evaporator room 8a, and is compressed via the drain port 22a and the refrigerating drain pipe 27a. It is discharged to the evaporating dish 33 provided on the upper part of the machine 24.

The toy 23a is provided with a toy heater 101 that melts the defrosted water when the defrosted water in the toy 23a freezes. The drainage pipe 27a for refrigeration is provided with a drainage pipe upper heater 102 and a drainage pipe lower heater 103. Further, in the final water collecting portion of the toy 23a, a toy temperature sensor 45 for detecting the presence or absence of residual water is embedded inside the heat insulating partition wall 28. The toy heater 101, the drain pipe upper heater 102, and the drain pipe lower heater 103 are, for example, electric heaters having a power consumption of 20 W or less and lower power consumption than the defrost heater 21. In the present embodiment, the toy heater 101 is a heater of 6 W, the drain pipe upper heater 102 is a heater of 3 W, and the drain pipe lower heater 103 is a heater of 1 W.

The refrigerator 1 includes a power system board 91 (high voltage system board) and a control board 110 (low voltage system board). The power system board 91 and the control board 110 are each equipped with a CPU, a memory such as a ROM or RAM, an interface circuit, or the like. That is, the refrigerator 1 is not a board in which the power system board 91 and the control board 110 are combined into one, but is divided into two boards, the power system board 91 is arranged in the machine room 39, and the control board 110 is in the refrigerating room. It is arranged in 2 (outside the machine room 39). The power system board 91 receives power from a commercial power source and includes a high-voltage portion. The control board 110 is insulated from the commercial power supply and the power system board 91, and includes at least a portion having a voltage lower than that of the commercial power supply. The control board 110 can be composed of, for example, a portion having a direct pressure of 12 V or less.

The power system board 91 and the control board 110 are connected by a cord (electric wire, harness) 92a. Further, the power system board 91 is connected to a commercial power supply via a power cord (power supply line) 92b.

A suction port 10a2 communicating with the machine room 39 is formed on the side plate 10a1 on the left side of the outer box 10a. A discharge port 10a4 communicating with the machine room 39 is formed on the side plate 10a3 on the right side of the outer box 10a.

Further, since the temperature inside the refrigerating room 2 has a smaller difference from the outside air temperature than the inside of the freezing room 7, the thickness of the heat insulating wall (foaming heat insulating material) of the refrigerating room 2 is the heat insulating wall (foaming) of the freezing room 7. It is formed thinner than the heat insulating material).

FIG. 3 is a perspective view showing the back surface of the refrigerator of the present embodiment.

As shown in FIG. 3, a machine room cover 90 that covers the machine room 39 is provided in the lower part of the back surface of the box body 10. The machine room cover 90 is formed by pressing a sheet metal or the like, and is formed in a substantially square plate shape.

Further, the machine room cover 90 has a shape capable of covering the entire horizontally long rectangular region opened on the back side of the machine room 39. Further, the machine room cover 90 is screw-fixed to the back surface of the box body 10.

Further, the machine room cover 90 has a plate portion 90a whose portions other than the left and right sides are parallel to the back plate 10s of the box body 10 (orthogonal to the side plates 10a1) and the plate portions 90a on both the left and right sides of the plate portion 90a. It has inclined plate portions 90b and 90c extending in an inclined manner. The inclined plate portion 90b is formed so as to approach the box body 10 toward the left end. The inclined plate portion 90c is formed so as to approach the box body 10 toward the right end. Further, a plurality of horizontally long slit-shaped holes 90c1 are formed in the inclined plate portion 90c, and function as a discharge port similar to the discharge port 10a. The reason why the inclined plate portions 90b and 90c are provided in this way is that even if the refrigerator 1 is installed in a state of being in contact with the wall (sticky state), a gap is formed between the refrigerator 1 and the wall. Therefore, the gap can be used as a heat exhaust passage.

Further, the slit-shaped hole 90c1 is not provided at a position where the substrate storage case 80 and the machine room cover 90, which will be described later, overlap each other in the front view (rear view of the refrigerator). As a result, it is possible to prevent dust from entering the inside of the substrate storage case 80 through the hole 90c1. In the present embodiment, as described above, the slit-shaped hole is not provided at the position where it overlaps with the substrate storage case 80, but the present embodiment is not limited to this configuration. If a slit-shaped hole is provided at a position overlapping the board storage case 80, even if the gap S (see FIG. 14) is small, the fan 19 acts between the board storage case 80 and the machine room cover 90. It is possible to generate an air flow and improve the cooling efficiency of the power system substrate 91.

FIG. 4 is a rear view showing the machine room of the present embodiment. Note that FIG. 4 shows a state in which the machine room cover 90 is removed.

As shown in FIG. 4, the machine room 39 is provided with a compressor 24, a fan (blower) 19, a dryer 51, a pressure reducing valve 62, a power system board storage case (hereinafter referred to as a board storage case) 80, and the like. There is.

An evaporating dish 33 is provided on the upper part of the compressor 24. The fan 19 is arranged on the upstream side of the wind flow of the compressor 24. The dryer 51 removes water during the refrigeration cycle, and is provided above the compressor 24. The pressure reducing valve 62 is provided on the downstream side of the compressor 24.

The board storage case 80 stores the power board 91 (see FIG. 2), and is arranged on the upstream side of the fan 26. Further, the substrate storage case 80 is provided with a lid 82 for accessing the power system substrate 91. The lid 82 has a substantially square shape and is attached so as to face the back side. Further, the substrate storage case 80 and the lid 82 are made of resin, and flame retardancy is preferable.

FIG. 5 is a rear view showing a state in which the substrate storage case is removed from the machine room shown in FIG. Note that FIG. 5 shows a state in which the machine room bottom plate 70 (see FIG. 4) provided at the bottom of the machine room 39 is removed in order to make it easier to see the inside of the machine room 39.

As shown in FIG. 5, in the machine room 39, on the upstream side of the fan 19, a condenser 61 (condenser) that condenses the refrigerant discharged from the compressor 24 is planar (for example, in the rear view of the refrigerator 1). It is provided in front of the substrate storage case 80 (which has a substantially rectangular shape). The condenser 61 is a fin tube type heat exchanger, and the refrigerant pipe 61a extends toward the compressor 24. Further, the refrigerant pipe 24a extends from the compressor 24 toward the condenser 61. The refrigerant pipe 61a and the refrigerant pipe 24a are connected via a connecting portion P (see FIG. 4) by brazing, welding, or the like.

If the connection portion P is formed near the capacitor 61, it will be located immediately in front of the substrate storage case 80. In this case, the connection portion P cannot be ignored even if the machine room cover 90 is removed. In view of this point, in the present embodiment, the connection portion P and the substrate storage case 80 are prevented from overlapping on the projection from the rear (rear surface) (see FIG. 4). By providing the connecting portion P at such a position, the connecting portion P is not hidden by the board storage case 80, and it becomes easy to see after removing the machine room cover 90 at the time of maintenance. Therefore, the refrigerant from the connecting portion P Leakage confirmation inspection becomes easier. When a plurality of connecting portions P are provided, it is preferable that all of them do not overlap with the substrate storage case 80, but at least a part of them does not overlap with each other, so that a certain effect can be obtained.

FIG. 6 is a perspective view showing the internal structure of the machine room. Note that FIG. 6 shows only the compressor 24, the fan 19, and the substrate storage case 80.

As shown in FIG. 6, brackets 24c and 24c are fixed to the compressor 24. Rubber elastic members 24b are attached to the brackets 24c at two locations, respectively. The compressor 24 is elastically supported on the machine room bottom plate 70 by the elastic member 24b.

The fan 19 includes an impeller 19a and a casing 19b that rotatably supports the impeller 19a. Further, the fan 19 has a closing member 19c that closes the gap between the casing 19b and the machine room 39. The closing member 19c makes it difficult for wind to pass outside the casing 19b.

The substrate storage case 80 includes a case main body 81 for accommodating a power system substrate 91 (see FIG. 7) and the like, and a lid 82 provided on the back surface of the case main body 81.

The case body 81 is configured to have a substantially rectangular opening on the back side (see FIG. 10).

The lid 82 has a plate surface portion 82a shaped along the plate portion 90a (see FIG. 3) of the machine room cover 90 (see FIG. 3) and an inclined surface portion 82b shaped along the inclined plate portion 90b (see FIG. 3). And have. Further, the lid body 82 has a bent plate portion 82c formed by bending in a direction orthogonal to the case main body 81 at the right end. A plurality of locking holes 82d formed through the bent plate portion 82c are formed along the bent plate portion 82c.

FIG. 7 is a plan view showing the inside of the substrate storage case. Note that FIG. 7 shows a state in which the lid 82 is removed from the substrate storage case 80.

As shown in FIG. 7, the power system board 91 is a square printed wiring board on which electrical and electronic components and connectors are mounted, and is mainly a compressor 24 (see FIG. 2) and a defrost heater 21 (see FIG. 2). This is a substrate that controls components that operate at high voltage, such as (see FIG. 2).

The case main body 81 has a board storage unit 83 in which the power system board 91 is stored, and a cord storage unit 84 in which the cord 92 connected to the power system board 91 is stored. The board storage portion 83 and the cord storage portion 84 communicate with each other via the notch 85. Further, the cord storage portion 84 is formed with a notch portion 84a through which the cord 92 is passed rearward (on the back side in the vertical direction of the paper surface). Further, the ground wire is drawn out from the case main body 81 via the concave ground wire guide portion 84u formed below the notch portion 84a.

FIG. 8 is a plan view showing a state in which the power system substrate is removed from the state of FIG. 7. Note that in FIG. 8, the cord 92a and the power cord 92b are not shown (the same applies to FIGS. 9 to 13).

As shown in FIG. 8, the case main body 81 has a reactor accommodating portion 86 for accommodating a reactor 93 for reducing high-frequency noise. The reactor housing portion 86 is provided with a fixing member 86a for fixing the reactor 93.

Further, the case main body 81 has side plates 83b, 83c, 83d, 83e rising from the top, bottom, left, and right of the bottom plate 83a, and is configured to surround the power system substrate 91 (see FIG. 7). A plurality of claws 83d1 for locking the lid 82 (see FIG. 6) are formed on the outer surface of the side plate 83d.

The cord accommodating portion 84 is formed adjacent to the substrate accommodating portion 83, and is formed long in the vertical direction. Further, the cord storage unit 84 is provided with a cord holding lid 84d that can be opened and closed so that the cord 92a can be closed after being stored. The cord holding lid 84d is formed with a guide 84c for preventing the cord 92a from popping out from the case body 81. Further, a plurality of claws 84d1 for locking the lid body 82 (see FIG. 6) are formed on the outer surface of the cord holding lid 84d.

Further, on the lower surface of the side plate 83c of the case body 81, a positioning portion 87a inserted into a hole (not shown) formed in the machine room bottom plate 70 (see FIG. 6) is formed so as to project downward. Further, on the upper surface of the side plate 83b of the case main body 81, a fixing portion 87b for screw-fixing the case main body 81 to the machine room 39 is formed so as to project upward.

Further, on the upper surface of the side plate 83b of the case main body 81, power cord holding portions 88a and 88a for holding the power cord 92b (see FIG. 6) in the cord 92a are formed. The power cord holding portion 88a is formed integrally with the side plate 83b, and guides the power cord 92b (see FIG. 6) so as to be in contact with the outer surface of the side plate 83b. Further, the side plate 83b is formed with power cord holding portions 88b, 88b for preventing the power cord 92b (see FIG. 6) from coming off from the power cord holding portion 88a.

Further, a power cord guide portion 89 for guiding the power cord 92b in a direction away from the case main body 81 is formed on the upper surface of the side plate 83b of the case main body 81. The power cord guide portion 89 is configured to include an extending portion 89a extending upward from the side plate 83b and a holding portion 89b for holding the power cord 92b. Further, an elastic sealing material (not shown) is provided between the holding portion 89b and the back plate 10s. As a result, it is possible to prevent water droplets from entering the inside of the substrate housing portion 83 through the power cord 92b, and also to suppress the intrusion of dust.

Further, inclined portions 10s1 and 10s2 are formed on the left and right ends of the back plate 10s so as to be inclined (or concave) toward the front side of the refrigerator 1 (see FIGS. 3 and 4). At least a part of the power cord guide portion 89 is positioned so as to overlap the inclined portion 10s1, and even if the back plate 10s of the refrigerator 1 is installed in a state of being in contact with the wall, there is a gap between the power cord guide portion 89 and the wall. Is formed, it is possible to prevent the power cord 92b from being damaged.

FIG. 27 is a perspective view of the back surface and the right side surface of the refrigerator 1 with the machine room cover 90 attached. As shown in FIG. 27, at least a part of the holding portion 89b of the power cord guide portion 89 is outside the notch 90a provided near the corner portion of the machine room cover 90, and the front view of the machine room cover 90 ( It is located so that it does not overlap (viewing the back of the refrigerator). As a result, the power cord 92b (broken line) can be made difficult to come into contact with the end face of the metal machine room cover 90, and damage to the power cord 92b can be suppressed. Further, the power cord guide portion 89 is formed with a flange portion 89c so as to cover the notch portion 90a, making it difficult for the user or a service person to touch the notch portion 90a.

FIG. 9 is a sectional view taken along line IX-IX of FIG.
As shown in FIG. 9, the reactor accommodating portion 86 is formed so as to project forward with respect to the substrate accommodating portion 83. The reactor 93 is configured so that the entire reactor 93 is hidden when the power system substrate 91 is housed in the substrate accommodating portion 83.

The cutout portion 85 is cut out in a U shape in the side plate 83e of the substrate storage portion 83, and is formed so that the concave surface faces rearward. Further, the notch portion 85 is formed at the upper portion of the side plate 83e, in other words, at the same height position as the reactor housing portion 86.

FIG. 10 is a perspective view showing a substrate storage case with the lid removed. Note that in FIG. 10, the cord 92a and the power cord 92b are not shown.

As shown in FIG. 10, the cord holding lid 84d is formed in a square plate shape, and is configured to be openable and closable (rotatable) in the case body 81. Note that FIG. 10 shows a state in which the cord holding lid 84d is opened. By providing the cord holding lid 84d in this way, the cord 92a can be easily stored in the cord storage portion 84, and the stored cord 92a and the power cord 92b can be prevented from popping out.

Further, the cord restraint lid 84d is formed with a guide 84c for locking the cord restraint lid 84d on the case body 81 side when the cord restraint lid 84d is closed. When the cord holding lid 84d is closed, the guide 84c is locked in the locking hole 83e1 formed in the side plate 83e.

Further, the cord storage portion 84 is formed with a storage portion 84t (see FIG. 7) in which the cord 92a and the power cord 92b are folded upward and stored in front of the cutout portion 84a. Even if water droplets penetrate into the cord storage portion 84 through the power cord 92b, the water droplets can penetrate into the substrate storage case 83 by folding the power cord 92b upward (cord trap structure). Can be suppressed. Further, in order to discharge the water droplets that have entered the inside of the cord storage portion 84 to the outside, a drain hole 84u is provided below the storage portion 84t.

FIG. 11 is a perspective view showing a state in which the cord holding lid is closed from the state of FIG.
As shown in FIG. 11, the case body 81 has an opening 84s formed in the upper part of the cord storage portion 84 from which the cord 92a and the power cord 92b are pulled out. The opening 84s is located near the upstream of the fan 19 (see FIG. 6), in other words, on the air suction side. Further, in the present embodiment, the cord storage portion 84, the opening 84s, and the like are formed at the position on the blower 19 side of the case main body 81, but are formed at the left-right inverted position (the intake port 10a2 side shown in FIG. 14). You may.

A claw 84d1 for locking the lid body 82 is formed on the outer surface of the cord holding lid 84d. The claw 84d1 is inserted into the locking hole 82d (see FIG. 6) formed in the bent portion 82c (see FIG. 6) of the lid 82 (see FIG. 6), so that the lid 82 is inserted into the case body 81. It is configured to be locked.

Further, in the machine room bottom plate 70, a ventilation plate material 95 composed of a plurality of slit-shaped holes 95a is fixed at a position facing the fan 19 (see FIG. 6) side of the case body 81. The air taken in from the intake port 10a2 is blown to the compressor 24 through the holes 95a of the ventilation plate member 95 and the fan 19.

FIG. 12 is an arrow view in the XII direction of FIG.
As shown in FIG. 12, the other end (left end) of the lid body 82 is formed with a bent portion 82e that is bent and formed on the case body 81 side. The bent portion 82e is formed with a locking hole 82f for locking the claw 83d1 formed in the case body 81.

Further, the lid 82 is formed with ribs 82p and 82q protruding from the fan 19 side. These ribs 82p and 82q are formed so as to extend in the vertical direction. Further, the lid 82r is formed with ribs 82r on the side opposite to the fan 19. The rib 82r is also formed so as to extend in the vertical direction.

FIG. 13 is an arrow view in the XIII direction of FIG.
As shown in FIG. 13, the substrate storage case 80 and the condenser 61 are arranged at positions where they do not overlap each other in the side view of the refrigerator 1. That is, the capacitor 61 is located below the reactor storage portion 86 of the substrate storage case 80.

Further, the reactor housing portion 86 and the fan 19 located on the downstream side are arranged at positions where they overlap each other in the side view. As a result, the wind of the fan 19 can be blown to the reactor housing portion 86, and the reactor 93, which is a heat generating component, can be indirectly cooled.

FIG. 14 is a schematic cross-sectional view taken along the line XIV-XIV of FIG.
As shown in FIG. 14, when the machine room cover 90 is attached to the back surface of the machine room 39, the ribs 82p and 82q formed on the lid 82 of the substrate storage case 80 come into contact with the inner wall surface 90a1 of the machine room cover 90. Or close. Further, the rib 82r formed on the lid body 82 comes into contact with or approaches the inner wall surface 90b1 of the inclined plate portion 90b of the machine room cover 90. As a result, a gap S is formed between the machine room cover 90 and the substrate storage case 80.

By the way, when the board storage case 80 is a board storage case 200 that does not have the inclined surface portion 82b, it has a shape shown by a two-dot chain line in FIG. 14, and the board storage case 200 is inward from the position of the point P1 of the machine room cover 90. It will be placed. Therefore, the substrate storage case 80 is arranged in a state of being close to the compressor 24. As a result, the power system board 91 in the board storage case 80 is easily affected by the heat generated from the compressor 24, and the cooling performance of the power system board 91 is impaired. Therefore, in the present embodiment, since the shape of the substrate storage case 80 is the inclined surface portion 82b having a shape along the inclined plate portion 90b of the machine room cover 90, the substrate storage case 80 can be kept away from the compressor 24. The power system board 91 is less likely to be affected by the heat of the compressor 24. Further, since the gap S between the board storage case 80 and the machine room cover 90 can be reduced, the size of the capacitor 61 located on the rear projection surface of the board storage case 80 can be increased in the front-rear direction, and the capacitor 61 can be increased. The heat dissipation performance of the can be improved.

FIG. 15 is a perspective view showing a modified example of the power system substrate storage case. The same components as those of the substrate storage case 80 described above are designated by the same reference numerals, and duplicated description thereof will be omitted.

As shown in FIG. 15, the substrate storage case (power system substrate storage case) 80A is formed by integrally forming a case body 81 and a lid 82. By forming the tip edge of the side plate 83d of the case body 81 and one side 82e of the lid 82 so as to be bendable, the lid 82 can be opened and closed with respect to the case body 81.

By integrally molding the case body 81 and the lid 82 in this way, it is possible to reduce the risk of seal failure when the lid 82 is closed. Further, by integrating the case body 81 and the lid 82 as described above, it is possible to eliminate the need for a seal allowance on only one side, so that the substrate storage case 80A can be miniaturized.

FIG. 16 is a front view showing a refrigerator compartment. Note that FIG. 16 shows a state in which the refrigerator compartment door 2a (see FIG. 1) is removed.

As shown in FIG. 16, in the refrigerating chamber 2, a chilled chamber 2b and a water supply tank 2e for ice making are arranged side by side in the left-right direction at the lowermost stage. Although not shown, the refrigerating chamber 2 is provided with a pump for supplying water to the ice making chamber 3 (see FIG. 1) behind the water supply tank 2e. Further, in the refrigerating chamber 2, a shelf member 2c is provided above the chilled chamber 2b and the water supply tank 2e. The shelf member 2c is screw-fixed to the inner box 10b or the refrigerating chamber duct 11 so that it cannot be easily removed.

A water supply pump (not shown) is arranged behind the water supply tank 2e. The cord (electric wire) and connector (connection portion) of this water supply pump are housed in the cord storage portion 122, and the inside of the cord storage portion 122 cannot be accessed unless the shelf member 2c fixed with screws is removed. ing. Therefore, during the service work, the control board 110 can be accessed by removing the lid 124 (see FIG. 19) of the control board storage case 120 after removing the screw-fixed decorative plate 2f. Further, the cord storage unit 122 can be accessed by removing the screw-fixed shelf member 2c. Specifically, for example, the lid itself of the cord storage portion 122 may be a shelf member 2c, or the lid may be covered with a shelf member 2c.

Further, the refrigerating chamber 2 is provided with a refrigerating chamber duct 11 extending in the vertical direction with a predetermined width on the back side of the shelf members 2c and 2d. Cold air refrigerating chamber discharge ports 11a (see FIG. 1) are formed on the upper surface and the left and right side surfaces of the refrigerating chamber duct 11.

FIG. 17 is a perspective view of the refrigerator compartment as viewed from the front. Note that FIG. 17 shows a state in which the refrigerating chamber duct 11, the shelf members 2c and 2d, the tray of the chilled chamber 2b, the ice making unit including the water supply tank 2e, and the decorative plate 2f (see FIG. 16) are removed. There is. Further, in FIG. 17, the cord (electric wire) connected to the control board 110 is not shown (the same applies to FIGS. 24 and 25).

As shown in FIG. 17, the refrigerating chamber 2 is provided with a control board storage case 120 for storing the control board 110 (master board, low power system board). In other words, the control board storage case 120 is provided at a position where it does not overlap with the refrigerating chamber duct 11 in the front-rear direction.

The control board 110 is a board that supplies power to parts that operate at low power, such as an internal light (not shown), temperature sensors 40a, 40b, 41, 42, 43, a damper (not shown), and fans 9a, 9b, 19. Is. Further, the control board 110 includes an in-compartment control microcomputer 110a that receives signals from each sensor (not shown) and an operation panel (not shown) to perform various controls. In this way, the control board 110 receives signals from various sensors and comprehensively controls the refrigerator 1 (members provided with the box body 10).

FIG. 18 is a block diagram showing the configuration of the refrigerator.
As shown in FIG. 18, the power system substrate 91 operates a high-voltage system compressor 24, a defrost heater 21, and the like, and includes a compressor motor 24M and a heater element 21S mounted on the compressor 24. It is connected via an electric wire (cord). The compressor motor 24M is connected to a commercial power source via a noise filter circuit 91a, a converter circuit (AC → DC) 91b, and an inverter circuit 91c. Further, a reactor 93 is connected between the noise filter circuit 91a and the converter circuit 91b. The inverter circuit 91c and the converter circuit 91b are controlled by the compressor control microcomputer 91d in response to an instruction from the internal control microcomputer 110a of the control board 110.

Further, the defrost heater 21 is connected to a commercial power source via a noise filter circuit 91a and a heater circuit 91e. The heater circuit 91e is controlled by the heater microcomputer 91f in response to an instruction from the internal control microcomputer 110a of the control board 110.

Further, the converter circuit 91b is connected to a switching power supply circuit 91g that converts a high-voltage direct current into a low-voltage direct current. High-voltage DC power is supplied to the inverter circuit 91c. The low-voltage DC power is supplied to the compressor control microcomputer 91d.

Further, the low-voltage DC power is connected to the DC / DC conversion circuit 110b of the control board 110 via the cord 92a. The DC / DC conversion circuit 110b further converts the DC to a low voltage (for example, 12V → 5V) DC.

The internal control microcomputer 110a is connected to the motor 110M via the motor driver 110c. The motor 110M is a motor for various fans 9a, 9b, 19, dampers (not shown), valves (not shown), and the like. For example, 12V of electric power is supplied to these motors 110M.

Further, the in-compartment control microcomputer 110a is connected to the operation panel 110P. The operation panel 110P is installed in, for example, the refrigerating room 2 and adjusts the temperature and strength of the inside of the refrigerator. Further, the internal control microcomputer 110a is connected to the service terminal 110T via the EEPROM 110d. The past log (operating status) is recorded in the EEPROM 110d. The serviceman can check the past operation status recorded in the EEPROM 110d by connecting to the service terminal 110T at the time of failure or maintenance.

Further, the in-compartment control microcomputer 110a is connected to sensors 40 composed of each temperature sensor. Further, the internal control microcomputer 110a appropriately controls the compressor motor 24M and the defrost heater 21 based on the temperature information acquired from the sensors 40. Further, the internal control microcomputer 110a is connected to each door switch. Further, the internal control microcomputer 110a appropriately controls the compressor motor 24M and the buzzer (not shown) based on the opening / closing signal of the door switch.

In this way, the control board 110 acquires information such as the sensors 40, and receives the operation information from the compressor 24 and the defrost heater 21 connected to the power system board 91, the operation panel 110P, and the door SW. It acquires information and controls each device of the high-voltage system and constant-voltage system in the refrigerator. On the other hand, although the power system board 91 includes the compressor control microcomputer 91d and the heater microcomputer 91f, it does not control the entire operation of the refrigerator 1.

19 is a perspective view showing the control board storage case, FIG. 20 is a perspective view showing a state in which the lid of the cord storage portion of the control board storage case is opened, and FIG. 21 is a view of FIG. 20 from the back side. It is a perspective view. Note that in FIGS. 20 to 21, the control board 110 is not shown.

As shown in FIG. 19, the control board storage case 120 has a board storage portion 121 whose front surface is open. Further, the control board storage case 120 has a cord storage unit 122 in which a cord connected to the control board 110 is stored under the board storage unit 121.

A fixing portion 121a for screw-fixing the control board storage case 120 to the inner box 10b (see FIG. 17) is formed on the upper portion of the board storage portion 121. Further, the substrate storage portion 121 is formed with locking claws 121b for locking the lid 124 at a plurality of positions on both the left and right sides. Further, if water droplets hang down on the surface of the lid 124, the water droplets can be guided to the outside of the substrate storage portion 121 by the inclined portion 124a formed at the lower part of the lid 124, and penetrate into the cord storage portion 122. Can be suppressed. Further, on the back surface of the lid 124, a sealing member (not shown) having elasticity is provided at a position facing and contacting the cord storage portion 120. As a result, the airtightness can be improved and the infiltration of water droplets into the cord storage unit 120 can be suppressed.

As shown in FIG. 20, the cord storage unit 122 includes a lid 122a that can be opened and closed. The lid 122a rotates by bending around the lower end edge portion.

Further, the cord accommodating portion 122 is formed with a claw 122b for locking the lid 122a. The lid 122a is formed with a locking hole 122c that is locked by the claw 122b.

Further, the cord storage unit 122 is provided with a guide member 122d for holding the cord in the cord storage unit 122.

Further, the control board storage case 120 is formed with a communication portion 123 for communicating the board storage portion 121 and the cord storage portion 122. The communication portion 123 is located at the center in the left-right direction, and is configured so that the recess faces forward.

As shown in FIG. 21, one or a plurality of ribs 121c (four in the present embodiment) are formed on the back surface of the substrate accommodating portion 121. The rib 121c is formed so as to extend from the left end to the right end, and is inclined so as to descend from the left side to the right side. Further, the ribs 121c are arranged at equal intervals in the vertical direction.

Further, on the back surface of the substrate storage portion 121, a rib 121d extending in the vertical direction is formed at the right end of the rib 121c. The rib 121d is formed so as to extend from the lower end of the rib 121c located at the lowermost end to the lower end of the cord accommodating portion 122.

Further, an opening 122e that communicates with the front is formed on the back surface of the cord storage portion 122. From this opening 122e, the cord 92a extending from the power system substrate 91 (see FIG. 7) is taken into the cord accommodating portion 122.

FIG. 22 is a perspective view of the cord retracting member when viewed from the front side, and FIG. 23 is a perspective view of the cord retracting member when viewed from the rear side.

As shown in FIG. 22, the cord pull-in member 125 is a member that holds the control board storage case 120 in the inner box 10b and pulls the cord 92a into the control board storage case 120. Further, the cord retracting member 125 includes a square plate-shaped base plate 125a and a square tubular fitting portion 125b that protrudes forward from the base plate 125a and fits into the opening 122e of the cord storage portion 122. It is composed of.

Further, a cutout portion 125c into which the communication portion 123 (see FIG. 20) is inserted is formed by being recessed in the upper portion of the fitting portion 125b. Further, a locking hole 125d that is locked to a claw (not shown) formed in the cord accommodating portion 122 is formed in the lower portion of the fitting portion 125b.

As shown in FIG. 23, a plurality of cord lead-in holes 125e and 125f are formed in the base plate 125a. These cord lead-in holes 125e and 125f are formed by elongated holes extending in the left-right direction, and are formed so as to be vertically separated from each other. Further, the cord lead-in holes 125e and 125f are formed in a tubular shape so as to project forward from the base plate 125a.

FIG. 24 is a perspective view of the refrigerator compartment when viewed from the back. In FIG. 24, the refrigerator 14a on the refrigerating chamber side is not shown.

As shown in FIG. 24, a refrigerant pipe 130 is embedded in the urethane of the box body 10 through which the low-temperature refrigerant that has passed through the evaporators 14a and 14b and before being sucked into the compressor 24 flows. The refrigerant pipe 130 has a confluence portion 130a at which the refrigerant merges at a height position below the refrigerating chamber 2 (see FIG. 17). In the confluence 130a, the refrigerant returning from the refrigerator room side evaporator 14a (see FIG. 2) to the compressor 24 (see FIG. 2) and the freezer room side evaporator 14b (see FIG. 2) to the compressor 24 (see FIG. 2). ) Return to merge with the refrigerant. A refrigerant pipe 130b returning to the compressor 24 is connected to the merging portion 130a. The refrigerant pipe 130b extends upward in the center in the width direction in the urethane on the back side of the refrigerating chamber 2, is folded downward at the upper part, passes through the outside of the control board storage case 120, and is a compressor in the machine room 39. It extends to 24.

The control board storage case 120 is held in the inner box 10b by a cord retracting member 125 attached from the urethane filling side. Further, a sealing material 140 made of a material that does not allow water to pass through is attached to the tip of the rib 121c (see FIG. 21) formed on the back surface of the substrate storage portion 121. The sealing material 140 is formed with a predetermined width so that all the tips of the four ribs 121c come into contact with each other.

The cord in the refrigerating chamber 2 is drawn into the control board storage case 120 through the refrigerating chamber 2 (inside the refrigerator) and is connected to the control board 110 (see FIG. 17). The cord 29a of the machine room 39 once passes through the urethane between the outer box 10a and the inner box 10b, and is connected to the control board 110 in the control board storage case 120 through the cord lead-in holes 125e and 125f. Further, the cords of the vegetable compartment 6 and the freezing chamber 7 are appropriately bundled, pass through the urethane, and are connected to the control substrate 110 in the control substrate storage case 120 through the cord lead-in holes 125e and 125f.

FIG. 25 is a sectional view taken along line XXIV-XXIV of FIG.
As shown in FIG. 25, the control board storage case 120 is held in the inner box 10b by fitting the fitting portion 125b of the cord retracting member 125 into the lower opening 122e. At this time, the cord pull-in member 125 is inserted into the fitting hole 10d formed in the inner box 10b from the urethane side (the side opposite to the refrigerating chamber 2), so that the peripheral edge of the base plate 125a The portion abuts on the peripheral edge of the fitting hole 10d of the inner box 10b. As a result, the fitting portion 125b of the cord retracting member 125 is in a state of protruding into the refrigerator by a predetermined amount. Further, when the fitting portion 125b is inserted into the cord accommodating portion 122, the communication portion 123 is located in the notch portion 125c formed in the fitting portion 125b.

Further, the control board storage case 120 is fixed to the inner box 10b by inserting a screw 127 into the fixing portion 121a at the upper end and screwing it into the boss 126 provided in the inner box 10b. The boss 126 is integrally formed with the base plate 126a, similarly to the cord retracting member 125. The boss 126 is attached to the inner box 10b by penetrating the inner box 10b and contacting the base plate 126a with the inner wall surface of the inner box 10b.

As a result, the control board storage case 120 is positioned and fixed to the inner box 10b. In this case, a space S1 is formed between the substrate storage portion 121 and the inner box 10b, and this space S1 is configured as a heat insulating layer (air layer). When the thickness of the space S1 is 7 mm or less, preferably 5 mm or less, convection is unlikely to occur, and the space S1 functions as a suitable heat insulating layer. As a result, the heat insulating property can be ensured even if the control board storage case 120 is provided in a region where the vacuum heat insulating material is difficult to arrange and the thickness is small. As illustrated in FIG. 24, since the refrigerant pipe 130 having a low temperature is laid in the vicinity of the control board storage case 120, the control board storage case 120 is cooled by solid heat transfer, for example, by unraveling the inner box 10b or the like. There is a risk that it will end up. In the present embodiment, since the substrate accommodating portion 121 is arranged from the inner box 10b with the space S1 which is the air heat insulating layer interposed therebetween, cooling of the control substrate 110 and the like and dew exposure due to the cooling can be suppressed.

Further, by fixing the control board storage case 120 to the inner box 10b, the sealing material 140 is sandwiched between the tip of the rib 121c and the inner box 10b.

By the way, the cold refrigerant that has passed through the refrigerator room side evaporator 14a (see FIG. 2) and the freezer room side evaporator 14b (see FIG. 2) is flowing through the refrigerant pipe 130 (see FIG. 24). Since the refrigerant pipe 130 is also cold, when the cold heat is transferred to the inside of the refrigerator through the inner box 10b, dew condensation water is generated in the refrigerator. It is necessary to prevent such condensed water from flowing through the inner box 10b and reaching the inside of the control board storage case 120. Therefore, by forming the rib 121c on the substrate storage portion 121 so that the substrate storage portion 121 is floated from the inner box 10b, it is possible to prevent the dew condensation water from entering the substrate storage portion 121.

Further, by forming the rib 121c on the substrate storage portion 121 and bringing it into contact with the inner box 10b via the sealing material 140, even if the condensed water falls from above the control board storage case 120 along the inner box 10b. , Condensation water hits the rib 121c and flows along the inclined surface of the rib 121c, and can be dropped at a position away from the control board storage case 120 (refrigerator chamber side evaporator 14a).

Further, by forming the space (gap) S1 between the substrate storage portion 121 and the inner box 10b, the space S1 can be used as an air heat insulating layer, so that dew condensation inside the substrate storage portion 121 is suppressed. be able to.

FIG. 26 is a schematic cross-sectional view taken along the line XXVI-XXVI of FIG.
As shown in FIG. 26, the corner portion of the inner box 10b has an inclined surface 10b1 cut diagonally, and the amount of urethane filled in the corner portion is increased. As a result, even if the urethane layer becomes thin, it is possible to prevent the strength of the box body 10 from decreasing. However, when such an inclined surface 10b1 is formed, the control board storage case 120 can be arranged only at the position indicated by the alternate long and short dash line. Therefore, in the present embodiment, the inclined surface 10b1 of the region where the control board storage case 120 is arranged is formed with a notch recess 10b2 having a substantially triangular shape in a plan view so that the control board storage case 120 is positioned at a position indicated by a solid line. Can be placed. By moving the position of the control board storage case 120 to the outside in this way, the width W of the refrigerating chamber duct 11 can be widened, and cold air can be sent to a wide area of the refrigerating chamber 2.

As described above, the refrigerator 1 of the present embodiment is arranged in the box body 10 having the refrigerating room 2, the vegetable room 6, and the freezing room 7, the machine room 39 formed on the back surface of the box body, and the machine room 39. The compressor 24 and the fan 19 are provided, and a substrate for controlling the box body 10 is provided. This substrate includes a power system substrate 91 arranged in the machine room 39 to supply electric power to the compressor 24, and a control substrate 110 arranged in the refrigerating chamber 2 to control the box body 10. The power system substrate 91 is arranged on the upstream side of the fan 19, and the compressor 24 is arranged on the downstream side of the fan 19. According to this, by arranging the power system board 91 and the control board 110 separately, even if the power system board 91 is arranged in the machine room 39, it is possible to secure an air passage for cooling the compressor 24. .. As a result, the compressor 24 can be efficiently cooled without expanding the machine room 39.

Further, in the present embodiment, the outside of the machine room 39 is a refrigerating room 2 (storage room) arranged above the machine room 39. According to this, the occurrence of freezing can be prevented and the occurrence of dew condensation can be suppressed as compared with the case where the control board 110 is arranged in the freezing chamber 7.

Further, in the present embodiment, the power system board 91 is arranged in the machine room 39, and the control board 110 is arranged in the refrigerating room 2. As a result, the total length of the required cord (electric wire) is larger than that in the case where a single board (power system board + control board) is arranged on the ceiling surface of the box body 10 (refrigerator body) as in the conventional case. The extension can be shortened.

Further, in the present embodiment, the box body 10 is provided with a suction port 10a2 on one side surface of the machine room 39 and a discharge port 10a4 on the other side surface of the machine room 39. According to this, since the air passage is formed linearly, the compressor 24 can be cooled more efficiently than when the air passage is formed in a curved shape.

Further, the present embodiment includes a power system board storage case 80 for storing the power system board 91, and the power system board storage case 80 has an opening 84s from which the cord 92 connected to the power system board 91 and the power supply cord 92b are pulled out. To be equipped. The power system board storage case 80 has an opening 84s located on the side where the fan 19 is arranged. According to this, since the opening 84s is located on the suction side of the fan 19, dust is less likely to enter the opening 84s.

Further, the present embodiment includes a machine room cover 90 that covers the back surface of the machine room 39 and has an inclined plate portion 90b at an end that is inclined toward the machine room 39 side. The substrate storage case 80 includes a case main body 81 having an opening 81a on the back surface side, and a lid body 82 for opening and closing the case main body 81. The lid body 82 has an inclined surface portion 82b along the inclined plate portion 90b. According to this, the substrate storage case 80 can be arranged close to the end of the machine room 39, and the power system substrate 91 can be arranged away from the compressor 24. As a result, the cooling performance of the power system board 91 in the board storage case 80 can be improved.

Further, in the present embodiment, the power cord 92b is fixed to the board storage case 80. By the way, when the power cord is fixed to the sheet metal of the refrigerator body (box body 10) as in the conventional case, the length of the power cord from the fixed portion to the substrate may vary due to the misalignment between the substrate and the fixed portion. is there. On the other hand, by fixing the power cord 92b to the board storage case 80, the length of the power cord 92b from the fixing portion (power cord holding portion 88a, power cord holding portion 88b) to the control board 110 is kept constant. be able to. Further, in the present embodiment, the power cord 92b can also be removed by simply removing the board storage case 80, and workability can be improved.

Further, the present embodiment includes a control board storage case 120 for accommodating the control board 110, and the control board storage case 120 is the rear side of the shelf member 2c fixed to the refrigerating chamber 2 as illustrated in FIG. The control board 110 is located above the shelf member 2c. According to this, the lid 124 of the control board storage case 120 can be removed by removing the decorative plate 2f fixed by the screws or the like without removing the screws or the like fixing the shelf member 2c to the control board 110. Since it is accessible, the accessibility to the control board 110 can be improved. The cord storage unit 122 provided at the bottom of the control board storage case 120 can be accessed by removing the fixed shelf member 2c, so that access by anyone other than the maintainer can be suppressed.

Further, in the present embodiment, the control board storage case 120 is arranged so as to be separated from the inner box 10b of the box body 10. According to this, it is possible to prevent the dew condensation water flowing along the surface of the inner box 10b from entering the control board storage case 120.

Further, in the present embodiment, the control board storage case 120 is formed with ribs 121c extending and inclining in the width direction on the surface facing the inner box 10b. According to this, the dew condensation water in contact with the rib 121c can be released to a position separated from the control board storage case 120.

Further, in the present embodiment, the rib 121c is inclined so as to descend toward the side of the refrigerator 14a on the refrigerating chamber side. According to this, the condensed water that has fallen from the rib 121c can be discharged by using the toy of the refrigerator 14a on the refrigerator compartment side.

Further, in the present embodiment, the tip of the rib 121c is in contact with the inner box 10b via the sealing material 140. According to this, the condensed water can be released to a position away from the control board storage case 120 without falling from the gap between the rib 121c and the inner box 10b.

Further, in the present embodiment, the ribs 121c are configured by arranging a plurality of ribs 121c side by side. Since the control board storage case 120 does not come into contact with the inner box 10b on the surface, it is possible to prevent dew condensation inside the control board storage case 120.

Further, the present embodiment includes a connection portion P for connecting the compressor side pipe 24a extending from the compressor 24 and the condenser side pipe 61a extending from the condenser 61 in the machine room 39. The connection portion P is provided at a position on the projection surface from the rear so as not to overlap with the power system board storage case 80. According to this, the accessibility to the connection portion P is improved, and the confirmation in the connection portion P becomes easy.

Although the present embodiment has been described above with reference to the drawings, the present embodiment is not limited to the above contents and includes various modifications. In the above-described embodiment, the case where the control board 110 is provided in the refrigerating chamber 2 has been described as an example, but the configuration may be such that the control board 110 is arranged in the freezing chamber 7 as the outside of the machine room 39.

Further, in the above-described embodiment, the refrigerator 1 provided with the refrigerator room side evaporator 14a has been described as an example, but the refrigerator room side evaporator 14a is not provided and a single evaporator is provided on the back side of the freezer chamber 7. It may be a refrigerator provided in.

In the present embodiment, the power system board 91 is arranged in the machine room 39, and the control board 110 is arranged in the refrigerating room 2. The power system board 91 is arranged in a machine room in the vicinity of the compressor 24 or the like because it is electrically connected to the high voltage system compressor 24 or the like by wiring (power wiring). Further, the control board 110 is electrically connected to the low-voltage sensors 40, the interior light, and the like by wiring (control wiring). By the way, since the position of the control board 110 can be made relatively free by using two boards as in the present embodiment, the total LC of the wiring length of the control wiring is shorter than that of arranging the control board in the machine room 39. did. Specifically, many sensors 40 and interior lights are arranged in the refrigerating room 2 in which the control board 110 is arranged, and the sensors 40 in the vegetable room 6 and the lower freezing room 5 which are storage rooms close to the machine room 39. When the number of internal lights is reduced and the sensors 40 and internal lights are arranged in the vegetable room 6 and the lower freezing room 5, they are provided relatively on the upper side. As a result, when it is assumed that the control wiring is connected to the power system board instead of the control board 110 of the present embodiment, that is, when the sum of the wiring lengths of the control wiring when there is only one board is LC2, the inequality LC <LC2 was satisfied. The LC and LC2 can be easily interpreted as the length when each sensor or interior light is connected to each substrate by a straight line, and each sensor or interior light to each substrate can be easily interpreted. It can also be interpreted as approximately the shortest length of the path passing between the inner box and the outer box.

The present application includes the following technical ideas.
(Appendix 1)
Refrigerator body with multiple storage rooms and
A machine room provided on the back side of the refrigerator body and
A compressor and a blower arranged inside the machine room,
A power system board arranged in the machine room to supply electric power to the compressor, and
A power board storage case for storing the power board is provided.
The power system substrate is arranged on the upstream side of the blower.
The power system board storage case is provided with an opening for an electric wire from which an electric wire connected to the power system substrate is drawn out.
The power system substrate storage case is a refrigerator characterized in that the opening for the electric wire is located on the side where the blower is arranged.

According to Appendix 1, the electric wire opening is located on the downstream side of the power system board storage case and on the upstream side of the blower. Since the air forcibly circulated by the blower is in the atmosphere, it may contain dust, water droplets, etc., but this flow flows from the upstream side to the downstream side of the power system board storage case. Then, since the opening for the electric wire is located at a position where it is difficult to take in the air flow, it is possible to prevent dust and the like from being sucked into the power system board storage case.

(Appendix 2)
Storage room and
The machine room provided on the back side of the refrigerator body and
A power system board that supplies electric power to the compressor is provided.
The storage room
A control board insulated from the power board and
A control board storage case for accommodating the control board and
Fixed shelves and
Equipped with a cord storage unit for storing cords
The fixed shelf can be removed to access the cord in the cord compartment.
A refrigerator characterized in that the control board in the control board storage case can be accessed without removing the fixed shelf.

According to Appendix 2, access to the control board can be facilitated during service work, and it is possible to prevent the user from accidentally accessing the control board and the cord storage unit.

(Appendix 3)
Refrigerator body with storage room and
A machine room provided on the back side of the refrigerator body and
The control board arranged in the storage chamber and
A control board storage case having a board storage portion for accommodating the control board is provided.
The control board storage case is a refrigerator characterized in that the control board storage case is arranged apart from the inner box of the refrigerator body with an air heat insulating layer interposed therebetween.

According to Appendix 3, even in a refrigerator body whose thickness has decreased in recent years and it is difficult to secure the installation thickness of the vacuum heat insulating material or the like, the heat insulating property can be ensured by the air heat insulating layer.

(Appendix 4)
Refrigerator body with storage room and
A machine room provided on the back side of the refrigerator body and
Compressors and capacitors placed inside the machine room,
A power board that supplies power to the compressor,
The machine room includes at least one pipe connection portion for connecting a compressor-side pipe extending from the compressor and a condenser-side pipe extending from the condenser.
Looking back at the refrigerator
The capacitor is behind the power system board and
A refrigerator characterized in that at least one or all of the pipe connection portions are provided at positions that do not overlap with the power system substrate storage case.

According to Appendix 4, it is possible to easily confirm whether or not leakage has occurred from the pipe connection portion due to brazing or welding.

(Appendix 5)
Refrigerator body with storage room and
A machine room provided on the back side of the refrigerator body and
A power system board arranged in the machine room to supply electric power to the compressor, and
The control board arranged in the storage chamber and
One or more components or members that are electrically connected to the power system board, and power wiring that connects the power system board and the components or the members, respectively.
It has one or more components or members that are electrically connected to the control board, and control wiring that connects the control board and the components or the members, respectively.
Let LC be the sum of the wiring lengths of each of the control wirings.
When the sum of the wiring lengths of the control wirings assuming that each of the control wirings is connected to the power system board instead of the control board is LC2,
A refrigerator characterized by satisfying the inequality LC <LC2.

According to Appendix 5, the total wiring length connecting the substrate and each component or member can be shortened.

1 Refrigerator 2 Refrigerator room (outside the storage room and machine room)
2c Shelf member (shelf)
7 Freezing room 9a Refrigerator room side fan 9b Freezing room side fan 10 Box body (refrigerator body)
10a Outer box 10a2 Suction port 10a4 Outlet port 10b Inner box 10b1 Inclined surface 10b2 Notch recess 11 Refrigerator room duct 14a Refrigerator room side evaporator 14b Freezer room side evaporator 19 Fan (blower)
21 Defrost heater 24 Compressor 39 Machine room 61 Capacitor 80, 80A Power system board storage case 81 Case body 81a
82 Lid 82a Plate surface 82b Inclined surface 83 Board storage 84 Cord storage 84s Opening (opening for electric wires)
85 Notch 86 Reactor storage 88a Power cord holding 88b Power cord holding 89 Power cord guide 90 Machine room cover 90a Plate 90a1 Inner wall surface 90b Inclined plate 90b1 Inner wall 91 Power system board 92a Cord (electric wire)
92b power cord (power line)
93 Reactor 110 Control board 120 Control board storage case 121 Board storage part 121c Rib 125 Cord lead-in member 125a Base plate 122 Cord storage part 130 Refrigerant pipe 140 Sealing material

Claims (2)

Refrigerator body with storage room and
A machine room provided on the back side of the refrigerator body and
The control board arranged in the storage chamber and
A control board storage case for accommodating the control board is provided.
The control board storage case is a refrigerator characterized in that the control board storage case is arranged apart from the inner box of the refrigerator body with an air heat insulating layer interposed therebetween. In the refrigerator according to claim 1,
A refrigerator characterized in that ribs are formed between the control board storage case and the inner box.

Images