CN112781297A - Refrigerator with a door - Google Patents

Abstract

The invention provides a refrigerator, which can effectively cool a compressor without enlarging a mechanical chamber. The refrigerator is provided with: a box body (10) having a refrigerating chamber (2), a freezing chamber (7), and a vegetable chamber (6); a machine chamber (39) provided on the rear surface side of the case (10); a compressor (24) and a fan (19) which are disposed inside the machine chamber (39); and a power substrate (91) which is disposed in the machine chamber (39) and supplies power to the compressor (24). The power-based board (91) is disposed upstream of the fan (19), and the compressor (24) is disposed downstream of the fan (19).

Description

Refrigerator with a door

Technical Field

The present invention relates to a refrigerator.

Background

Patent document 1 describes a refrigerator in which a substrate is divided into two parts and accommodated in a casing, and the casing is disposed in a machine room.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2005-98559

Disclosure of Invention

Problems to be solved by the invention

In addition, when the control board is disposed in the machine room, the board needs to be disposed upstream of the fan in order to effectively cool the compressor. However, in the refrigerator described in patent document 1, since the two substrates are divided and arranged in front and rear, the overlap with the fan in the machine room becomes large, and the cooling efficiency of the compressor is impaired. In addition, there are the following problems: in order to reduce the overlap between the casing and the fan, the machine chamber needs to be enlarged, but if the machine chamber is enlarged, the volume in the case is reduced.

The present invention has been made to solve the above conventional problems, and an object of the present invention is to provide a refrigerator capable of efficiently cooling a compressor without enlarging a machine chamber.

Means for solving the problems

The present invention is characterized by comprising: a refrigerator main body having a plurality of storage compartments; a machine chamber provided on a rear surface side of the refrigerator main body; a compressor and a blower disposed inside the machine chamber; and a power substrate disposed in the machine chamber and configured to supply electric power to the compressor, wherein the power substrate is disposed upstream of the blower, and the compressor is disposed downstream of the blower.

Effects of the invention

According to the present invention, it is possible to provide a refrigerator capable of efficiently cooling a compressor without enlarging a machine chamber.

Drawings

Fig. 1 is a longitudinal sectional view of the refrigerator according to the present embodiment as viewed from the side.

Fig. 2 is a schematic sectional view taken along line II-II in fig. 1.

Fig. 3 is a perspective view showing a rear surface of the refrigerator according to the present embodiment.

Fig. 4 is a rear view showing the machine room of the present embodiment.

Fig. 5 is a rear view showing a state where the substrate storage case is detached from the machine chamber shown in fig. 4.

Fig. 6 is a perspective view showing an internal structure of the machine room.

Fig. 7 is a plan view showing the inside of the substrate storage case.

Fig. 8 is a plan view showing a state where the power base board is removed from the state of fig. 7.

Fig. 9 is a sectional view taken along line IX-IX of fig. 7.

Fig. 10 is a perspective view showing the substrate storage case with the cover removed.

Fig. 11 is a perspective view showing a state where the cable restraining cover is closed from the state of fig. 10.

Fig. 12 is a view in the direction XII of fig. 6.

Fig. 13 is a view from XIII in fig. 12.

Fig. 14 is a schematic cross-sectional view taken along line XIV-XIV of fig. 3.

Fig. 15 is a perspective view showing a modification of the power board storage case.

Fig. 16 is a front view showing a refrigerating chamber.

Fig. 17 is a perspective view of the refrigerating compartment as viewed from the front.

Fig. 18 is a block diagram showing a structure of the refrigerator.

Fig. 19 is a perspective view showing the control board storage case.

Fig. 20 is a perspective view showing a state where the cover of the cable housing section is opened in the control board housing case.

Fig. 21 is a perspective view of fig. 20 as viewed from the back side.

Fig. 22 is a perspective view of the cable introducing part as viewed from the front side.

Fig. 23 is a perspective view of the cable drawing member viewed from the rear side.

Fig. 24 is a perspective view of the refrigerating compartment as viewed from the back.

Fig. 25 is a sectional view taken along line XXV-XXV of fig. 17.

Fig. 26 is a schematic sectional view of fig. 17 taken along line XXVI-XXVI.

In the figure:

1-refrigerator, 2-refrigerating compartment (storage compartment, outside of machine compartment, refrigerating temperature zone compartment), 2 c-shelf member, 7-freezing compartment, 9 a-refrigerating compartment side fan, 9 b-freezing compartment side fan, 10-cabinet (refrigerator main body), 10A-outer box, 10A 2-suction inlet, 10A 4-discharge outlet, 10 b-inner box, 10b 1-inclined surface, 10b 2-notch concave portion, 11-refrigerating compartment duct, 14 a-refrigerating compartment side evaporator, 14 b-freezing compartment side evaporator, 19-fan (blower), 21-defrosting heater, 24-compressor, 39-machine compartment, 61-condenser, 80A-power type substrate storage case, 81-case main body, 81 a-opening, 82-cover, 82 a-panel surface portion, 82 b-inclined surface portion, 83-substrate storage portion, 84-cable storage portion, 84 s-opening (opening for electric wire), 85-notch part, 86-reactor housing part, 88 a-power cable holding part, 88 b-power cable holding part, 89-power cable guiding part, 90-machine chamber cover, 90 a-plate part, 90a 1-inner wall surface, 90 b-inclined plate part, 90b 1-inner wall surface, 91-power substrate, 92 a-cable (wire), 92 b-power cable (power cord), 93-reactor, 110-control substrate, 120-control substrate housing case, 121-substrate housing part, 121 c-rib, 125-cable lead-in member, 125 a-substrate plate, 122-cable housing part, 130-refrigerant pipe, 140-seal, P-connecting part.

Detailed Description

Hereinafter, the refrigerator according to the present embodiment will be described with reference to the drawings. In the following, the directions shown in fig. 1 and 2 will be described as references.

Fig. 1 is a longitudinal sectional view of the refrigerator according to the present embodiment as viewed from the side.

As shown in fig. 1, a casing (refrigerator main body, heat insulating casing) 10 of a refrigerator 1 includes storage compartments in the order of a refrigerating compartment 2 (refrigerating temperature zone compartment), an ice making compartment 3 and an upper freezing compartment 4, a lower freezing compartment 5, and a vegetable compartment 6, which are arranged side by side in the left-right direction. Further, refrigerator 1 includes rotary refrigerating chamber door 2a for opening and closing the front opening of refrigerating chamber 2. Refrigerator 1 further includes drawer-type ice making chamber door 3a, upper freezing chamber door 4a, lower freezing chamber door 5a, and vegetable chamber door 6a that open and close front openings of ice making chamber 3, upper freezing chamber 4, lower freezing chamber 5, and vegetable chamber 6, respectively. Hereinafter, ice making compartment 3, upper-stage freezing compartment 4, and lower-stage freezing compartment 5 are collectively referred to as freezing compartment 7 (freezing temperature zone compartment).

Freezing chamber 7 is a storage chamber in which the interior of the chamber is substantially set to a freezing temperature zone (less than 0 ℃), for example, to about-18 ℃ on average. Refrigerating room 2 and vegetable room 6 are storage rooms whose interior is set to a refrigerating temperature zone (0 ℃ or higher), and for example, refrigerating room 2 is a storage room whose average temperature is about 4 ℃, and vegetable room 6 is a storage room whose average temperature is about 7 ℃.

The refrigerating chamber 2, the upper-stage freezing chamber 4, and the ice-making chamber 3 are partitioned by a heat-insulating partition wall 28. The lower freezing chamber 5 and the vegetable chamber 6 are partitioned by an insulating partition wall 29. In addition, heat insulating partition walls 30 are provided on the front sides of the storage compartments of ice making compartment 3, upper freezing compartment 4, and lower freezing compartment 5 so that air in freezing compartment 7 does not leak to the outside of the refrigerator through gaps between ice making compartment door 3a, upper freezing compartment door 4a, and lower freezing compartment door 5a, and air outside the refrigerator does not enter the storage compartments.

The cabinet 10 of the refrigerator 1 is configured by filling a heat insulating material R (for example, urethane foam) between an outer box 10a made of a steel plate and an inner box 10b made of a synthetic resin, and the outside and the inside of the refrigerator 1 are partitioned. The heat insulator R is formed by injecting and foaming a foam heat insulator made of rigid polyurethane foam.

Further, a plurality of vacuum heat insulators 25 are attached between the outer box 10a and the inner box 10b of the box body 10, in addition to the heat insulator R. In other words, the vacuum heat insulator 25 is provided on the rear surface side, the ceiling side (not shown), the left surface side (not shown), the right surface side (not shown), and the bottom surface side (not shown) of the casing 10.

The freezing chamber 7 includes a container 4b drawn integrally with the upper freezing chamber door 4a, a container 5b drawn integrally with the lower freezing chamber door 5a, and a vegetable chamber container 6b drawn integrally with the vegetable chamber door 6 a.

In addition, a refrigerating chamber side evaporator 14a (evaporator) is provided in a refrigerating chamber side evaporator chamber 8a on the back of the refrigerating chamber 2. The air having a low temperature obtained by heat exchange with the refrigerating chamber side evaporator 14a is blown into the refrigerating chamber 2 by the refrigerating chamber side fan 9a provided above the refrigerating chamber side evaporator 14a through the refrigerating chamber air duct 11 and the refrigerating chamber discharge port 11a, and the refrigerating chamber 2 is cooled. The air blown into the refrigerating chamber 2 returns to the refrigerating chamber side evaporator chamber 8a from the refrigerating chamber return opening 15a, and is cooled again by the refrigerating chamber side evaporator 14 a.

In addition, a fresh air compartment 2b in which the indoor temperature is maintained at 0 ℃ is provided in the lowermost layer of the refrigerating compartment 2. A shelf member 2c is provided above the fresh air compartment 2b so as to cover the entire upper portion of the fresh air compartment 2 b. The shelf member 2c is screwed to the inner box 10b, the refrigerating chamber duct 11, and the like, so that the user cannot easily detach it. In addition, a plurality of shelf members 2d whose height positions can be changed are provided in the refrigerating chamber 2.

In addition, a freezing chamber side evaporator 14b (evaporator) is provided in the freezing chamber side evaporator chamber 8b on the back of the freezing chamber 7. The air having a low temperature obtained by heat exchange with freezing chamber side evaporator 14b is blown into freezing chamber 7 by freezing chamber side fan 9b provided above freezing chamber side evaporator 14b through freezing chamber air passage 12 and freezing chamber outlet 12a, and cools freezing chamber 7. The air blown to the freezing chamber 7 is returned 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 14 b.

In the refrigerator 1 of the present embodiment, the vegetable compartment 6 is also cooled by the air that has been cooled by the freezing compartment-side evaporator 14 b. The air having passed through the freezing chamber side evaporator 14b and having a low temperature in the freezing chamber side evaporator chamber 8b is blown by the freezing chamber side fan 9b to the vegetable compartment 6 through a vegetable compartment air passage (not shown) and a vegetable compartment damper (not shown), thereby cooling the vegetable compartment 6. When the temperature of the vegetable compartment 6 is low, the cooling of the vegetable compartment 6 is suppressed by closing the vegetable compartment damper. The air blown into the vegetable compartment 6 is returned from the cold air returning portion 18a provided on the vegetable compartment side in front of the lower portion of the heat insulating partition wall 29 to the lower portion of the freezing compartment-side evaporator chamber 8b through the vegetable compartment cold air returning duct 18.

Refrigerating room temperature sensor 41, freezing room temperature sensor 42, and vegetable room temperature sensor 43 are provided on the rear side of the inside of refrigerating room 2, freezing room 7, and vegetable room 6, respectively. A refrigerating chamber side evaporator temperature sensor 40a is provided above the refrigerating chamber side evaporator 14a, and a freezing chamber side evaporator temperature sensor 40b is provided above the freezing chamber side evaporator 14 b. These sensors 41, 42, 43, 40a, and 40b (hereinafter collectively referred to as sensors 40) detect the temperatures of refrigerating room 2, freezing room 7, vegetable room 6, refrigerating room side evaporator 14a, and freezing room side evaporator 14 b. As the other sensors, door sensors (not shown) for detecting the open/close states of the doors 2a, 3a, 4a, 5a, and 6a are provided.

Fig. 2 is a schematic sectional view taken along line II-II in fig. 1.

As shown in fig. 2, a defrosting heater 21 that heats the freezing chamber side evaporator 14b is provided at a lower portion of the freezing chamber side evaporator chamber 8 b. The defrosting heater 21 is, for example, an electric heater of 50W to 200W, and in the present embodiment, a radiation heater of 150W is used. The defrosting water (melting water) generated during defrosting of the freezing chamber side evaporator 14b falls into a flow groove 23b provided in the lower portion of the freezing chamber side evaporator chamber 8b, and is discharged to an evaporation pan 33 provided in the upper portion of the compressor 24 via a drain port 22b and a freezing drain pipe 27 b.

The defrosting water generated during defrosting of the refrigerating chamber side evaporator 14a falls into a flow groove 23a provided in the lower portion of the refrigerating chamber side evaporator chamber 8a, and is discharged to an evaporation pan 33 provided in the upper portion of the compressor 24 via a drain port 22a and a refrigerating drain pipe 27 a.

The gutter 23a is provided with a gutter heater 101 that melts the defrost water in the gutter 23a when the defrost water is frozen. The cooling drain 27a is provided with a drain upper heater 102 and a drain lower heater 103. In addition, a gutter temperature sensor 45 for detecting the presence or absence of residual water is embedded in the interior of the heat-insulating partition wall 28 in the final water collection portion of the gutter 23 a. The trough heater 101, the drain upper heater 102, and the drain lower heater 103 are electric heaters having a power consumption lower than that of the defrosting heater 21, for example, 20W or less. In the present embodiment, the trough heater 101 is a 6W heater, the drain upper heater 102 is a 3W heater, and the drain lower heater 103 is a 1W heater.

The refrigerator 1 includes a power board 91 (high-voltage board) and a control board 110 (low-voltage board). The power board 91 and the control board 110 are respectively mounted with a memory such as a CPU, a ROM, and a RAM, an interface circuit, and the like. That is, the refrigerator 1 is not formed by integrating the power substrate 91 and the control substrate 110 into one substrate, but is formed by dividing the power substrate 91 into two substrates, disposing the power substrate 91 in the machine room 39, and disposing the control substrate 110 in the refrigerating room 2 (outside the machine room 39). The power substrate 91 receives power supply from a commercial power source and includes a high-voltage portion. The control board 110 is insulated from the commercial power source and the power board 91, and is formed of at least a portion having a lower voltage than the commercial power source. The control board 110 may be configured with a dc voltage of 12V or less, for example.

The power board 91 and the control board 110 are connected by a cable (electric wire, wire harness) 92 a. The power board 91 and the commercial power source are connected via a power cable (power line) 92 b.

An intake port 10a2 communicating with the machine chamber 39 is formed in the left side plate 10a1 of the outer box 10 a. An outlet 10a4 communicating with the machine chamber 39 is formed in the right side plate 10a3 of the outer box 10 a.

Since the difference between the temperature in refrigerating room 2 and the outside air temperature is smaller than that in freezing room 7, the thickness of the heat insulating wall (foam heat insulator) of refrigerating room 2 is formed thinner than that of freezing room 7.

Fig. 3 is a perspective view showing a rear surface of the refrigerator according to the present embodiment.

As shown in fig. 3, a machine chamber cover 90 that covers the machine chamber 39 is provided at a lower portion of the rear surface of the casing 10. The machine chamber cover 90 is formed by pressing a sheet metal, and is formed in a substantially rectangular plate shape.

The machine chamber cover 90 has a shape capable of covering the entire area of the laterally long rectangular shape that is open on the rear surface side of the machine chamber 39. The machine chamber cover 90 is screwed to the rear surface of the casing 10.

Further, the machine chamber cover 90 includes: a plate portion 90a parallel to the back plate 10s of the case 10 (orthogonal to the side plate 10a 1) except for portions on the left and right sides; and inclined plate portions 90b and 90c extending obliquely with respect to the plate portion 90a on both left and right sides of the plate portion 90 a. The inclined plate portion 90b is formed to approach the case 10 toward the left end. The inclined plate portion 90c is formed to be close to the case 10 toward the right end. Further, the inclined plate portion 90c is formed with a plurality of laterally long slit-like holes 90c1, and functions as a discharge port similar to the discharge port 10 a. The reason why the inclined plate portions 90b and 90c are provided in this manner is that, even if the refrigerator 1 is placed in contact with a wall (in an adhered state), a gap is formed between the inclined plate portions and the wall, and therefore the gap can be a path through which heat is discharged. The slit-shaped hole 90c1 is not provided at a position overlapping with the substrate storage case 80 described later in the front view (rear view of the refrigerator) of the machine room cover 90. This can prevent dust from entering the inside of the board housing case 80 through the hole 90c 1.

Fig. 4 is a rear view showing the machine room of the present embodiment. Fig. 4 shows a state where the machine chamber cover 90 is removed.

As shown in fig. 4, the machine chamber 39 is provided with a compressor 24, a fan (blower) 19, a dryer 51, a pressure reducing valve 62, a power-type substrate housing case (hereinafter, referred to as a substrate housing case) 80, and the like.

An evaporation pan 33 is provided above the compressor 24. The fan 19 is disposed upstream of the compressor 24 in the air flow. The dryer 51 removes moisture in 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 housing case 80 houses a power board 91 (see fig. 2) and is disposed upstream of the fan 26. The board housing case 80 is provided with a cover 82 for accessing the power board 91. The cover 82 has a substantially rectangular shape and is attached to the rear surface side.

Fig. 5 is a rear view showing a state where the substrate storage case is detached from the machine chamber shown in fig. 4. Fig. 5 shows a state in which a machine chamber bottom plate 70 (see fig. 4) provided at the bottom of the machine chamber 39 is removed to facilitate observation of the inside of the machine chamber 39.

As shown in fig. 5, a condenser 61(condenser) for condensing the refrigerant discharged from the compressor 24 is provided upstream of the fan 19 in the machine room 39. The condenser 61 is a fin-tube heat exchanger, and a refrigerant pipe 61a extends toward the compressor 24. Further, a refrigerant pipe 24a is also provided extending from the compressor 24 toward the condenser 61. The refrigerant pipe 61a and the refrigerant pipe 24a are connected to each other via a connection portion P (see fig. 4) by brazing, welding, or the like. The connection portion P is provided at a position not overlapping the substrate storage case 80 in a projection from the rear (rear surface) (see fig. 4). By providing the connection portion P at such a position, the connection portion P is not hidden in the board housing case 80, and the machine chamber cover 90 is detached and easily viewed during maintenance, so that checking for refrigerant leakage from the connection portion P is facilitated. When a plurality of connection portions P are provided, all of the connection portions P are preferably at positions not overlapping with the substrate storage case 80, but certain effects can be achieved as long as at least a part of the connection portions P are at positions not overlapping with each other.

Fig. 6 is a perspective view showing an internal structure of the machine room. Fig. 6 shows only the compressor 24, the fan 19, and the board housing case 80.

As shown in fig. 6, brackets 24c, 24c are fixed to the compressor 24. Elastic members 24b made of rubber are attached to the holder 24c at two positions, respectively. The compressor 24 is elastically supported on the machine room bottom plate 70 by the elastic member 24 b.

The fan 19 includes an impeller 19a and a casing 19b that rotatably supports the impeller 19 a. The fan 19 further includes a closing member 19c that closes a gap between the housing 19b and the machine chamber 39. The closing member 19c prevents wind from passing outside the housing 19 b.

The board housing case 80 includes a case main body 81 for housing the power board 91 (see fig. 7) and the like, and a cover 82 provided on the back surface of the case main body 81.

The housing main 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 that follows the shape of the plate portion 90a (see fig. 3) of the machine room cover 90 (see fig. 3); and an inclined surface portion 82b along the shape of the inclined plate portion 90b (see fig. 3). The cover 82 has a bent plate portion 82c formed by bending in a direction perpendicular to the case main body 81 at the right end. The curved plate portion 82c has a plurality of locking holes 82d formed to penetrate in a quadrangular shape along the curved plate portion 82 c.

Fig. 7 is a plan view showing the inside of the substrate storage case. Fig. 7 shows a state where the cover 82 is removed from the board housing case 80.

As shown in fig. 7, the power board 91 is a board on which electric and electronic components and connectors are mounted on a rectangular printed wiring board, and mainly controls components that operate at high voltage, such as the compressor 24 (see fig. 2) and the defrosting heater 21 (see fig. 2).

The case body 81 includes a board housing portion 83 for housing the power board 91 and a cable housing portion 84 for housing the cable 92 connected to the power board 91. The board housing portion 83 and the cable housing portion 84 communicate via the notch portion 85. Further, a notch 84a for passing the cable 92 to the rear (the depth side in the vertical direction of the drawing) is formed in the cable housing portion 84.

Fig. 8 is a plan view showing a state where the power base board is removed from the state of fig. 7. Note that in fig. 8, the cables 92a (92) and the power supply cable 92b (92) are not shown (the same applies to fig. 9 to 13).

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

The case body 81 has side plates 83b, 83c, 83d, and 83e rising from the upper, lower, left, and right sides of the bottom plate 83a, and is configured to surround the power 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 83 d.

The cable housing portion 84 is formed adjacent to the substrate housing portion 83, and is formed long in the vertical direction. A cable restraining cover 84d is provided to the cable storage 84 so as to be openable and closable after the cable 92a is stored. The cable stopper cover 84d is formed with a guide 84c for preventing the cable 92a from jumping out of the housing main body 81. Further, a plurality of claws 84d1 for locking the lid 82 (see fig. 6) are formed on the outer surface of the cable restraining lid 84 d.

A positioning portion 87a is formed on the lower surface of the side plate 83c of the casing main body 81 so as to protrude downward, and the positioning portion 87a is inserted into a hole (not shown) formed in the machine chamber bottom plate 70 (see fig. 6). A fixing portion 87b for screwing the case body 81 to the machine chamber 39 is formed on the upper surface of the side plate 83b of the case body 81 so as to protrude upward, and the fixing portion 87b is formed on the upper surface of the side plate 83 b.

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

Further, a power cable guide 89 for guiding the power cable 92b in a direction away from the case body 81 is formed on the upper surface of the side plate 83b of the case body 81. The power cable guide 89 includes an extension portion 89a extending upward from the side plate 83b and a holding portion 89b holding the power cable 92 b. Further, a seal (not shown) having elasticity is provided between the holding portion 89b and the back plate 10 s. This can prevent water droplets from entering the inside of the board housing section 83 along the power cable 92 b.

Further, inclined portions 10s1, 10s2 (see fig. 3, 4) inclined (or recessed) toward the near side of the refrigerator 1 are formed at both left and right ends of the back plate 10 s. At least a part of the power cable guide 89 is located at a position overlapping the inclined portion 10s1, and even if the back panel 10s of the refrigerator 1 is placed in contact with the wall, a gap is formed between the back panel and the wall, and therefore, damage to the power cable 92b can be suppressed.

Fig. 9 is a sectional view taken along line IX-IX of fig. 7.

As shown in fig. 9, the reactor housing portion 86 is formed to protrude forward relative to the substrate housing portion 83. The reactor 93 is configured such that the entire reactor 93 is hidden when the power substrate 91 is accommodated in the substrate accommodating portion 83.

The cutout 85 is formed by cutting out the side plate 83e of the board housing portion 83 in a U shape with a concave surface facing rearward. The notch 85 is formed at the upper portion of the side plate 83e, in other words, at the same height as the reactor housing 86.

Fig. 10 is a perspective view showing the substrate storage case with the cover removed. In fig. 10, the cable 92a and the power cable 92b are not shown.

As shown in fig. 10, the cable restraining cover 84d is formed in a rectangular plate shape and is configured to be openable (turnable) and closable (rotatable) in the housing main body 81. Fig. 10 is a state where the cable restraining cover 84d is opened. By providing the cable restraining cover 84d in this way, the cable 92a can be easily stored in the cable storage portion 84, and the stored cable 92a and the power cable 92b can be prevented from jumping out.

Further, a guide 84c is formed on the cable restraining cover 84d, and when the cable restraining cover 84d is closed, the guide 84c causes the cable restraining cover 84d to be locked to the housing main body 81 side. When the cable restraining cover 84d is closed, the guide 84c is engaged with the engagement hole 83e1 formed in the side plate 83 e.

The cable storage portion 84 is formed with a storage portion 84t (see fig. 7) that folds and stores the cable 92a and the power cable 92b upward in front of the notch portion 84 a. Even when water droplets enter the inside of the cable housing portion 84 along the power cable 92b, the water droplets can be prevented from entering the inside of the substrate housing portion 83 by folding back the power cable 92b upward (cable water-repellent structure). Further, a drain hole 84u is provided below the housing portion 84t in order to drain water droplets that have entered the inside of the cable housing portion 84 to the outside.

Fig. 11 is a perspective view showing a state where the cable restraining cover is closed from the state of fig. 10.

As shown in fig. 11, the case body 81 has an opening 84s formed in an upper portion of the cable housing portion 84, through which the cable 92a and the power cable 92b are drawn. The opening 84s is located in the vicinity of the upstream of the fan 19 (see fig. 6), in other words, on the air suction side.

A claw 84d1 for locking the lid body 82 is formed on the outer surface of the cable restraining lid 84 d. The claws 84d1 are configured to engage the cover 82 with the case body 81 by being inserted into engagement holes 82d (see fig. 6) formed in a curved portion 82c (see fig. 6) of the cover 82 (see fig. 6).

A ventilation plate member 95 including a plurality of slit-shaped holes 95a is fixed to the machine room floor 70 at a position facing the fan 19 (see fig. 6) of the casing body 81. The air sucked from the suction port 10a2 passes through the hole 95a of the air flow plate 95, the fan 19, and is blown to the compressor 24.

Fig. 12 is a view in the direction XII of fig. 6.

As shown in fig. 12, the other end (left end) of the lid 82 is formed with a bent portion 82e bent toward the case main body 81 side. The bent portion 82e is formed with a locking hole 82f to which the claw 83d1 formed in the case body 81 is locked.

Further, ribs 82p, 82q are formed on the fan 19 side of the cover 82. These ribs 82p, 82q are formed extending in the up-down direction. Further, a rib 82r is formed on the cover 82 on the side opposite to the fan 19. The rib 82r is also formed to extend in the vertical direction.

Fig. 13 is a view from XIII in fig. 12.

As shown in fig. 13, the substrate storage case 80 and the condenser 61 are disposed at positions that do not overlap each other in a side view of the refrigerator 1. That is, the condenser 61 is located below the reactor housing section 86 of the substrate housing case 80.

The reactor housing section 86 and the fan 19 located on the downstream side are disposed at positions overlapping each other in the side view of the refrigerator 1. This allows the air from the fan 19 to be blown into the reactor housing 86, thereby indirectly cooling the reactor 93, which is a heat generating component.

Fig. 14 is a schematic cross-sectional view taken along line XIV-XIV of fig. 3.

As shown in fig. 14, if the machine chamber cover 90 is attached to the rear surface of the machine chamber 39, the ribs 82p and 82q formed on the lid 82 of the board housing case 80 abut against the inner wall surface 90a1 of the machine chamber cover 90. Further, the rib 82r formed on the lid 82 abuts against the inner wall surface 90b1 of the inclined plate portion 90b of the machine compartment cover 90. Thereby, a gap S is formed between the machine chamber cover 90 and the substrate storage case 80.

In the case where the substrate storage case 80 is the substrate storage case 200 having no inclined surface portion 82b, the shape is shown by the two-dot chain line in fig. 14, and the substrate storage case 200 is disposed inward from the position of the point P1 of the machine room cover 90. Therefore, the substrate housing case 80 is disposed in a state of being close to the compressor 24. This makes the power substrate 91 in the substrate storage case 80 susceptible to the heat generated by the compressor 24, and the cooling performance of the power substrate 91 is impaired. Therefore, in the present embodiment, since the substrate housing case 80 is formed in the inclined surface portion 82b that is the shape along the inclined plate portion 90b of the machine chamber cover 90, the substrate housing case 80 can be separated from the compressor 24, and the power board 91 is less likely to be affected by the heat of the compressor 24. Further, since the gap S between the substrate storage case 80 and the machine chamber cover 90 can be reduced, the dimension of the condenser 61 in the front-rear direction on the rear projection surface of the substrate storage case 80 can be increased, and the heat radiation performance of the condenser 61 can be improved.

Fig. 15 is a perspective view showing a modification of the power board storage case. The same components as those of the substrate storage case 80 are denoted by the same reference numerals, and redundant description thereof is omitted.

As shown in fig. 15, a board housing case (power board housing case) 80A is integrally formed with a case main body 81 and a lid 82. The lid 82 can be opened and closed with respect to the case body 81 by forming the leading edge portion of the side plate 83d of the case body 81 and the one side 82e of the lid 82 to be bendable.

In this way, by integrally molding the case body 81 and the lid 82, the risk of a poor seal when the lid 82 is closed can be reduced. Further, by integrating the case main body 81 and the lid 82 as described above, a sealing amount can be required only on one side, and therefore the substrate storage case 80A can be downsized.

Fig. 16 is a front view showing a refrigerating chamber. Fig. 16 shows a state where the refrigerating chamber door 2a (see fig. 1) is detached.

As shown in fig. 16, the refrigerating chamber 2 is provided with a fresh air chamber 2b and a water supply tank 2e for ice making in parallel in the left-right direction at the lowermost layer. In the refrigerating compartment 2, although not shown, a pump for supplying water to the ice making compartment 3 (see fig. 1) is provided behind the water supply tank 2 e. In addition, the refrigerating chamber 2 is provided with a shelf member 2c above the fresh air chamber 2b and the water supply tank 2 e. The shelf member 2c is screwed to the inner box 10b and the refrigerating room duct 11, and can be easily detached.

Further, the refrigerating compartment 2 is provided with a refrigerating compartment duct 11 extending in the vertical direction with a predetermined width on the deep side of the shelf members 2c and 2 d. A cold-storage room discharge port 11a (see fig. 1) for cold air is formed in the upper surface and the left and right side surfaces of the cold-storage room duct 11.

Fig. 17 is a perspective view of the refrigerating compartment as viewed from the front. Fig. 17 shows a state in which the refrigerating chamber duct 11, the shelf members 2c and 2d, and the tray of the fresh food chamber 2b, the ice making unit including the water supply tank 2e, and the decorative plate 2f (see fig. 16) shown in fig. 16 are removed. Note that in fig. 17, illustration of cables (electric wires) connected to the control board 110 is omitted (the same applies to fig. 24 and 25).

As shown in fig. 17, the refrigerating compartment 2 is provided with a control board housing case 120 housing the control board 110 (main board, low-power board). In other words, the control board storage case 120 is provided at a position not overlapping with the refrigerating compartment duct 11 in the front-rear direction.

The control board 110 is a board that supplies power to components that operate with low power, such as the in-box lamp (not shown), the temperature sensors 40a, 40b, 41, 42, 43, the windshield (not shown), and the fans 9a, 9b, 19. The control board 110 includes an in-box control microcomputer 110a, and the in-box control microcomputer 110a receives signals from sensors (not shown) and an operation panel (not shown) and performs various controls. In this way, the control board 110 receives signals from various sensors and collectively controls the refrigerator 1 (components provided in the cabinet 10).

Fig. 18 is a block diagram showing a structure of the refrigerator.

As shown in fig. 18, the power system board 91 operates the high-voltage system compressor 24, the defrosting heater 21, and the like, and is connected to the compressor motor 24M and the heating element 21S mounted on the compressor 24 via electric wires (cables). The compressor motor 24M is connected to a commercial power supply via a noise filter circuit 91a, a converter circuit (AC → DC)91b, and an inverter circuit 91 c. Further, a reactor 93 is connected between the noise filter circuit 91a and the converter circuit 91 b. The inverter circuit 91c and the converter circuit 91b are controlled by the compressor control microcomputer 91d in response to an instruction from the in-box control microcomputer 110a of the control board 110.

The defrosting heater 21 is connected to a commercial power supply via a noise filter circuit 91a and a heater circuit 91 e. The heater circuit 91e receives an instruction from the in-tank control microcomputer 110a of the control board 110 via the heater microcomputer 91f and is controlled.

The conversion circuit 91b is connected to a switching power supply circuit 91g that converts high-voltage dc into low-voltage dc. The high-voltage dc power is supplied to the inverter circuit 91 c. The low-voltage dc power is supplied to the compressor control microcomputer 91 d.

The low-voltage DC power is connected to the DC/DC converter circuit 110b of the control board 110 via the cable 92 a. The DC/DC conversion circuit 110b further converts the voltage into a low-voltage (e.g., 12V → 5V) direct current.

The in-box control microcomputer 110a is connected to the motor 110M via a motor driver 110 c. The motor 110M is a motor for the fans 9a, 9b, and 19, a damper (not shown), a valve (not shown), and the like. For example, 12V is supplied to the motor 110M.

The in-box control microcomputer 110a is connected to the operation panel 110P. The operation panel 110P is provided in the refrigerating compartment 2, for example, and adjusts the intensity of the temperature in the compartment. The in-box control microcomputer 110a is connected to the service terminal 110T via an EEPROM110 d. The EEPROM110d stores a past log (operating condition). In the event of a failure or maintenance, the service person can confirm the past operating conditions stored in the RRPROM110d by connecting to the service terminal 110T.

The in-box control microcomputer 110a is connected to sensors 40 including temperature sensors. The in-tank control microcomputer 110a appropriately controls the compressor motor 24M and the defrosting heater 21 based on the temperature information acquired from the sensors 40. Further, the in-box control microcomputer 110a is connected to each door switch. The in-box control microcomputer 110a appropriately controls the compressor motor 24M and a buzzer, not shown, based on the opening/closing signal of the door switch.

In this way, the control board 110 acquires information of the sensors 40 and the like, controls the compressor 24 and the defrosting heater 21 connected to the power board 91, acquires operation information from the operation panel 110P, information from the door SW, and controls each device of the high voltage type and the constant voltage type in the box. On the other hand, the power board 91 includes a compressor control microcomputer 91d and a heater microcomputer 91f, but does not control the overall operation of the refrigerator 1.

Fig. 19 is a perspective view showing the control board storage case, fig. 20 is a perspective view showing a state where a cover of a cable storage portion of the control board storage case is opened, and fig. 21 is a perspective view when fig. 20 is viewed from a back side. In fig. 19 to 21, the control board 110 is not shown.

As shown in fig. 19, the control board housing case 120 has a board housing portion 121 with a front surface removed. The control board housing case 120 has a cable housing portion 122 for housing a cable connected to the control board 110 below the board housing portion 121.

A fixing portion 121a for screwing the control board housing case 120 to the inner case 10b (see fig. 17) is formed at an upper portion of the board housing portion 121. In the board housing portion 121, locking claws 121b for locking the decorative plate 2f (see fig. 17) are formed at a plurality of positions on both the left and right sides.

As shown in fig. 20, the cable housing 122 includes an openable/closable cover 122 a. The lid 122a is turned by being bent about the lower end edge portion.

The cable housing 122 is formed with a claw 122b for locking the cover 122 a. The cover 122a is formed with a locking hole 122c locked by the claw 122 b.

Further, the cable housing 122 is provided with a guide member 122d for restraining the cable within the cable housing 122.

Further, the control board housing case 120 is formed with a communication portion 123 that communicates the board housing portion 121 and the cable housing portion 122. The communication portion 123 is located at the center in the left-right direction, and is configured such that the concave portion faces forward.

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

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

Further, an opening 122e communicating with the front is formed in the rear surface of the cable housing portion 122. The cable 92a extending from the power board 91 (see fig. 7) is received in the cable housing 122 through the opening 122 e.

Fig. 22 is a perspective view of the cable drawing member viewed from the front side, and fig. 23 is a perspective view of the cable drawing member viewed from the rear side.

As shown in fig. 22, the cable drawing member 125 is a member that holds the control board housing case 120 in the inner box 10b and draws the cable 92a into the control board housing case 120. Further, the cable introducing member 125 is configured to include: a rectangular plate-shaped base plate 125 a; and a quadrangular cylindrical fitting portion 125b, the fitting portion 125b protruding forward from the base plate 125a and fitting into the opening 122e of the cable housing portion 122.

Further, a notch 125c into which the communication portion 123 (see fig. 20) is inserted is formed in a recessed shape in an upper portion of the fitting portion 125 b. Further, a locking hole 125d is formed in a lower portion of the fitting portion 125b, and the locking hole 125d is locked to a claw (not shown) formed in the cable housing portion 122.

As shown in fig. 23, a plurality of cable inlet holes 125e and 125f are formed in the base plate 125 a. These cable introduction holes 125e, 125f are formed by long holes extending in the left-right direction, and are formed separately from each other up and down. The cable inlet holes 125e and 125f protrude forward from the base plate 125a and are formed in a cylindrical shape.

Fig. 24 is a perspective view of the refrigerating compartment as viewed from the back. In fig. 24, illustration of the refrigerating chamber side evaporator 14a is omitted.

As shown in fig. 24, a refrigerant pipe 130 is embedded in the urethane of the tank 10, and a low-temperature refrigerant before being sucked into the compressor 24 through the evaporators 14a and 14b flows through the refrigerant pipe 130. The refrigerant pipe 130 has a merging portion 130a at a height position below the refrigerating compartment 2 (see fig. 17) where the refrigerants merge. In the merging portion 130a, the refrigerant returning from the refrigerating chamber side evaporator 14a (see fig. 2) to the compressor 24 (see fig. 2) and the refrigerant returning from the freezing chamber side evaporator 14b (see fig. 2) to the compressor 24 (see fig. 2) merge. A refrigerant pipe 130b returning to the compressor 24 is connected to the merging portion 130 a. The refrigerant pipe 130b extends upward at the center in the width direction in the polyurethane on the back side of the refrigerating chamber 2, is folded back downward at the upper portion, passes through the outside of the control board housing case 120, and extends to the compressor 24 of the machine chamber 39.

The control board housing case 120 is held in the inner box 10b by a cable introduction member 125 attached from the urethane filling side. Further, a sealing member 140 made of a watertight material is attached to the tip of a rib 121c (see fig. 21) formed on the rear surface of the substrate accommodating portion 121. The seal 140 is formed to have a predetermined width so that the tips of all the four ribs 121c abut against each other.

The cable in the refrigerating compartment 2 is led into the control board housing case 120 through the refrigerating compartment 2 (inside of the compartment), and is connected to the control board 110 (see fig. 17). The cable 29a in the machine room 39 is temporarily inserted into the urethane between the outer box 10a and the inner box 10b, is inserted through the cable introduction holes 125e and 125f, and is connected to the control board 110 in the control board housing case 120. Cables for vegetable compartment 6 and freezing compartment 7 are appropriately bundled, passed through the urethane, passed through cable inlet holes 125e and 125f, and connected to control board 110 in control board housing case 120.

Fig. 25 is a sectional view taken along line XXV-XXV of fig. 17.

As shown in fig. 25, the control board housing case 120 is held by the inner case 10b by fitting the fitting portion 125b of the cable drawing member 125 into the opening 122e in the lower portion. At this time, the cable drawing member 125 is inserted into the fitting hole 10d formed in the inner case 10b from the urethane side (the side opposite to the refrigerating chamber 2) through the fitting portion 125b, so that the peripheral edge portion of the base plate 125a touches the peripheral edge portion of the fitting hole 10d of the inner case 10 b. Thereby, the fitting portion 125b of the cable drawing member 125 projects into the box by a predetermined amount. Further, if the fitting portion 125b is inserted into the cable housing portion 122, the communication portion 123 is positioned in the notch portion 125c formed in the fitting portion 125 b.

The control board housing case 120 is fixed to the inner case 10b by inserting a screw 127 through the fixing portion 121a at the upper end and screwing it into a boss 126 provided in the inner case 10 b. The boss 126 is formed integrally with the base plate 126a, similarly to the cable introduction member 125. The boss 126 penetrates the inner casing 10b, and is attached to the inner casing 10b by the base plate 126a coming into contact with the inner wall surface of the inner casing 10 b.

Thereby, the control board housing case 120 is positioned and fixed to the inner box 10 b. In this case, a space S1 is formed between the substrate storage section 121 and the inner box 10b, and the space S1 is configured as a heat insulating layer (air layer). Accordingly, even if the control board storage case 120 is provided in a region where the vacuum heat insulator is difficult to be disposed and the thickness is small, the heat insulation property can be ensured. As illustrated in fig. 24, since the refrigerant pipe 130 that has a low temperature is laid near the control board housing case 120, the control board housing case 120 has a problem of being cooled by solid heat transfer via the inner box 10b or the like, for example. In the present embodiment, since the board storage section 121 is disposed from the inner box 10b with the space S1 as the air insulating layer interposed therebetween, cooling of the control board 110 and the like and condensation caused by the cooling can be suppressed.

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

The refrigerant cooled by passing through the refrigerating chamber side evaporator 14a (see fig. 2) and the freezing chamber side evaporator 14b (see fig. 2) flows through the refrigerant pipe 130 (see fig. 24). The refrigerant pipe 130 is also cooled, and thus if cold heat is transferred into the tank through the inner tank 10b, dew condensation water is generated in the tank. It is necessary to prevent such dew condensation water from reaching the control board housing case 120 along the inner box 10 b. Therefore, by forming the ribs 121c in the substrate housing section 121, the substrate housing section 121 is set to be in a state of being lifted from the inner box 10b, and thus, dew condensation water can be prevented from entering the substrate housing section 121.

Further, by forming the rib 121c in the substrate storage section 121 and contacting the inner box 10b via the seal 140, even if the dew condensation water falls from above the control substrate storage case 120 along the inner box 10b, the dew condensation water can flow along the inclined surface of the rib 121c after hitting the rib 121c, and fall at a position (the refrigerating chamber side evaporator 14a) separated from the control substrate storage case 120.

Further, since the space S1 can be made an air heat insulating layer by forming the space (gap) S1 between the board storage section 121 and the inner box 10b, condensation inside the board storage section 121 can be suppressed.

Fig. 26 is a schematic sectional view of fig. 17 taken along line XXVI-XXVI.

As shown in fig. 26, the corner of the inner box 10b has an inclined surface 10b1 cut obliquely, increasing the amount of polyurethane filling in the corner. This can suppress a decrease in strength of the case 10 even when the layer of polyurethane is thin. However, if the inclined surface 10b1 is formed, the control board storage case 120 can only be disposed at the position indicated by the two-dot chain line. Therefore, in the present embodiment, the notch recess 10b2 having a substantially triangular shape in plan view is formed in the inclined surface 10b1 of the region where the control board storage case 120 is disposed, whereby the control board storage case 120 can be disposed at the position indicated by the solid line. In this way, the position of control board storage case 120 can be moved outward, and the width W of refrigerating room duct 11 can be increased, and cold air can be supplied to a large area of refrigerating room 2.

As described above, the refrigerator 1 of the present embodiment includes: a cabinet 10 having a refrigerating chamber 2, a vegetable chamber 6, and a freezing chamber 7; a machine chamber 39 formed on the rear surface of the casing 10; a compressor 24 and a fan 19 disposed in the machine chamber 39; and a power substrate 91 disposed in the machine chamber 39 and supplying electric power to the compressor 24. The power substrate 91 is disposed upstream of the fan 19, and the compressor 24 is disposed downstream of the fan 19. Accordingly, by disposing the power board 91 and the control board 110 separately from each other in the machine chamber 39, an air passage for cooling the compressor 24 can be ensured. As a result, the compressor 24 can be cooled efficiently without enlarging the machine chamber 39.

The present embodiment includes a control board 110 that is disposed outside the machine chamber 30 and controls the cabinet 10, and the outside of the machine chamber 39 is the refrigerating chamber 2 (storage chamber, refrigerating temperature zone chamber). Accordingly, compared to the case where control board 110 is disposed in freezing chamber 7 (freezing temperature zone chamber), the occurrence of freezing can be prevented and the occurrence of condensation can be suppressed.

In the present embodiment, power board 91 is disposed in machine room 39, and control board 110 is disposed in refrigerating room 2. As a result, the total length of the required cables (wires) can be shortened as compared with the conventional case where a single substrate (power board + control board) is disposed on the ceiling surface of the casing 10 (refrigerator main body).

In the present embodiment, the casing 10 includes the suction port 10a2 on one side surface of the machine room 39, and the discharge port 10a4 on the other side surface of the machine room 39. Accordingly, since the air passage is formed linearly, the compressor 24 can be cooled more efficiently than when the air passage is formed curved.

The present embodiment further includes a power substrate housing case 80 housing the power substrate 91 and the reactor 93. The reactor 93 and the fan 19 are disposed at positions overlapping each other in a side view of the refrigerator 1. Accordingly, the reactor 93 as a heat generating component can be cooled by the wind of the fan 19.

In addition, the present embodiment includes a board housing case 80 housing the power board 91, and the board housing case 80 includes an opening 84s through which the cable 92 connected to the power board 91 and the power cable 92b are led out. In the substrate storage case 80, the opening 84s is located on the side where the fan 19 is disposed. Accordingly, since the opening 84s is located on the suction side of the fan 19, dust is less likely to enter the opening 84 s.

The present embodiment further includes a machine chamber cover 90, and the machine chamber cover 90 covers the back surface of the machine chamber 39 and has an inclined plate portion 90b inclined toward the machine chamber 39 at an end portion thereof. The substrate storage case 80 includes a case main body 81 having an opening 81a on the rear surface side, and a lid 82 for opening and closing the case main body 81. At least a part of the lid 82 is opposed to the inclined plate portion 90b in the rear view of the refrigerator 1. Accordingly, the substrate housing case 80 can be disposed close to the end of the machine chamber 39, and the power board 91 can be disposed away from the compressor 24. As a result, the cooling performance of the power substrate 91 in the substrate storage case 80 can be improved.

In the present embodiment, the lid 82 has the inclined surface portion 82b formed along the inclined plate portion 90 b. Accordingly, by providing the lid 82 along the inclined plate portion 90b, the substrate storage case 80 can be disposed close to the end of the machine chamber 39 and close to the machine chamber cover 90.

In the present embodiment, the power cable 92b is fixed to the board housing case 80. In addition, when the power cable is fixed to the sheet metal of the refrigerator main body (casing 10) as in the related art, the length of the power cable from the fixing portion to the substrate may vary due to the misalignment between the substrate and the fixing portion. In contrast, by fixing the power cable 92b to the board housing case 80, the length of the power cable 92b from the fixing portion (the power cable holding portion 88a, the power cable holding portion 88b) to the control board 110 can be kept constant. In the present embodiment, the power cable 92b can be detached by simply detaching the board housing case 80, and workability can be improved.

In addition, the present embodiment includes a control board housing case 120 that houses the control board 110, and as illustrated in fig. 17 and the like, the control board housing case 120 is disposed behind a shelf member 2c fixed to the refrigerating compartment 2, and the control board 110 is positioned above the shelf member 2 c. Accordingly, the control board 110 can be accessed without removing screws or the like that fix the shelf member 2c, and thus the access to the control board 110 can be improved. Further, since the control board housing case 120 is fixed by the fixed shelf member 2c, access by other than the maintainer can be suppressed. The user can install wiring and the like on the back of the chilled fresh food casing which is difficult or impossible to access the shelf member 2c or lower side thereof.

In the present embodiment, the control board storage case 120 is disposed separately from the inner case 10b of the casing 10. This can prevent dew condensation water flowing along the surface of the inner box 10b from entering the control board storage case 120.

In the present embodiment, the control board storage case 120 has a rib 121c formed on a surface facing the inner box 10b, the rib extending in the width direction and being inclined. Accordingly, the dew condensation water contacting the rib 121c can be evacuated to a position separated from the control board storage case 120.

In the present embodiment, the rib 121c is inclined so as to descend toward the refrigerating chamber side evaporator 14 a. Accordingly, the dew condensation water falling from the rib 121c can be discharged by the gutter of the refrigerating chamber side evaporator 14 a.

In the present embodiment, the tip of the rib 121c abuts against the inner case 10b via the seal 140. This enables the dew condensation water to escape to a position separated from the control board storage case 120 without falling from the gap between the rib 121c and the inner box 10 b.

In the present embodiment, a plurality of ribs 121c are arranged in a row. Since the control board housing case 120 and the inner box 10b are not in surface contact with each other, dew condensation in the control board housing case 120 can be suppressed.

In the present embodiment, the machine chamber 39 is provided with a connection portion P for connecting a compressor-side pipe 24a extending from the compressor 24 and a condenser-side pipe 61a extending from the condenser 61. The connection portion P is provided at a position not overlapping with the power board housing case 80 on a projection surface from the rear. This improves the proximity to the connection portion P, and facilitates the confirmation of the connection portion P.

The present embodiment has been described above with reference to the drawings, but the present embodiment is not limited to the above description and includes various modifications. In the above-described embodiment, the control board 110 is provided in the refrigerating chamber 2 as an example, but may be disposed outside the machine chamber 39 in the freezing chamber 7.

In the above-described embodiment, the refrigerator 1 including the refrigerating chamber side evaporator 14a is described as an example, but a refrigerator may be provided without the refrigerating chamber side evaporator 14a and with a single evaporator provided on the back side of the freezing chamber 7.

Claims (8)

1. A refrigerator is characterized by comprising:

a refrigerator main body having a plurality of storage compartments;

a machine chamber provided on a rear surface side of the refrigerator main body;

a compressor and a blower disposed inside the machine chamber; and

a power base plate disposed in the machine chamber and supplying electric power to the compressor,

the power substrate is disposed upstream of the blower,

the compressor is disposed on a downstream side of the blower.

2. The refrigerator according to claim 1,

includes a control board disposed outside the machine chamber and controlling the refrigerator main body,

the outside of the machine room is a refrigerating temperature zone room as the storage room.

3. The refrigerator according to claim 1 or 2,

the refrigerator main body includes an inlet on one side surface of the machine chamber and an outlet on the other side surface of the machine chamber.

4. The refrigerator according to any one of claims 1 to 3,

comprises a power substrate housing case for housing the power substrate and the reactor,

the reactor and the blower are disposed at positions overlapping each other in a side view of the refrigerator.

5. The refrigerator according to any one of claims 1 to 4,

a power substrate housing case for housing the power substrate,

the power substrate housing case has an opening for a wire through which a wire connected to the power substrate is led out,

in the power board housing case, the wire opening is located on a side where the blower is disposed.

6. The refrigerator according to claim 5,

a machine chamber cover covering a back surface of the machine chamber and having an inclined plate portion inclined toward the machine chamber side at an end portion,

the power substrate housing case includes a case body having an opening on a back surface side thereof and a lid body for opening and closing the case body,

at least a portion of the cover body is opposed to the inclined plate portion in a rear view angle of the refrigerator.

7. The refrigerator according to claim 6,

the lid body has an inclined surface portion formed along the inclined plate portion.

8. The refrigerator according to any one of claims 5 to 7,

the power supply line of the electric wires is fixed to the power board housing case.

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