JP4473799B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and more particularly to a configuration that reduces the vibration of refrigeration cycle piping such as a condenser while reducing the size of a machine room.

  Conventionally, in the machine room formed in the lower back of the heat insulation box main body of the refrigerator, a compressor and a condenser that form part of a refrigeration cycle for circulating the refrigerant, a flow path switching valve, and various pipes that connect these with the interior, Furthermore, many device parts such as an air cooling fan and electrical parts are stored and arranged.

  The condenser includes a wire capacitor in which heat radiation wires are welded to both surfaces of a refrigerant pipe formed in a serpentine shape, a spiral fin system in which strip-shaped heat radiation fin pieces are spirally wound around the pipe, or the same serpentine shape There is a fin tube system in which plate-like fins are fitted and fixed to the refrigerant pipe, and they are used properly according to cost and arrangement configuration.

  Conventionally, in the case of a wire capacitor, this was horizontally disposed on the bottom of the main body, but its inlet / outlet pipe part is configured to engage with a hook part provided in a synthetic resin fixture, and the vibration of the compressor The contact between the condenser and the fixing member covering the condenser cannot be prevented by transmission, and it is necessary to attach an anti-vibration rubber due to individual dimensional variations.

Conventionally, in a machine room, the vibration of the compressor that sucks and discharges refrigerant gas and the piping vibrates due to the pressure pulsation of the discharged refrigerant. Reduce vibration by improving the compressor itself, the placement of a silencer such as a muffler to reduce pressure pulsation, and suppression of resonance by attaching anti-vibration rubber to the vibration generating part of the piping. Reduction was attempted (for example, see Patent Documents 1 and 2).
Japanese Utility Model Publication No. 3-6192 Japanese Patent Laid-Open No. 3-7864

  However, the anti-vibration rubber is usually formed of an elastic rubber material having a certain amount of mass to reduce the vibration power of the pipe or shift the resonance mode, and is fixed by being fitted into a bent portion of the pipe. However, piping in the machine room varies in shape due to its bending position, angle forming error, and mounting error, and since the resonance point is different and sound generation varies, it is attached to a predetermined pipe position with a constant mass. Anti-vibration rubber cannot cope with vibrations caused by various factors, has a large load for studying its weight and mounting position, and has the disadvantages of increasing the cost burden such as material costs and mounting man-hours during manufacturing. there were. Furthermore, wire capacitors are heavy because they are made of copper or iron, and when attached to the refrigerator body, it is difficult to work alone, and when used for a long period of time, the fixtures deteriorate over time. There was a problem that caused new vibration noise.

  The present invention has been made paying attention to the above points, and is a refrigerator that has a configuration in which machine room parts are efficiently installed and made compact, heat dissipation efficiency of the condenser is improved, vibration is suppressed, and noise is reduced. The purpose is to provide.

In order to solve the above-mentioned problems, the refrigerator according to claim 1 of the present invention radiates heat by introducing a machine room formed in the lower back of the refrigerator body, a compressor installed in the machine room, and a refrigerant discharged from the compressor. In this way, a flat plate-like condenser standing along the back of the machine room and a plate-like fixing plate made of a resin molded product are provided, and the fixing plate is arranged along the plane of the condenser. Engaging with both ends of the condenser in the width direction of the machine room to be integrated with the condenser to form an assembly unit, the fixing plate is opposed to the refrigerator body, and the assembly unit is connected to the refrigerator body. The refrigerator according to claim 6 is fixed to the refrigerator main body in a state of being temporarily fixed to the machine body, and the refrigerator according to claim 6 has a machine room formed in a lower back portion of the refrigerator main body, and a width direction of the machine room. A compressor installed close to one of the A flat plate-like condenser erected along the back wall in the duct formed by the cover box covering the back of the machine room and the outer casing rear plate on the other side of the machine room in the width direction; It is arranged so that the axial flow is in the front-rear direction of the main body facing this condenser, and the air sucked from the bottom of the main body is blown to the compressor and partly divided to exchange heat with the condenser and flow upward. A heat-dissipating fan and a plate-shaped fixing plate made of a resin molded product, and the fixing plate is disposed along the plane of the condenser and engages with both ends of the condenser in the width direction of the machine chamber And an assembly unit integrated with the condenser, the fixing plate is opposed to the refrigerator body, and the assembly unit is fixed to the refrigerator body in a state of being temporarily fixed to the refrigerator body. It is characterized by.

  According to the first aspect of the present invention, a heavy and large condenser can be easily fixed to the main body side in a mechanical room without being in contact with other parts. In addition, the transmission of vibrations can be suppressed and the generation of noise can be suppressed. According to the invention of claim 6, the machine room space can be made compact together with the above-mentioned action, and the heat radiation efficiency can be improved. On the other hand, a refrigerator with high internal volume efficiency can be obtained.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1 which is a rear view of a machine room portion of the refrigerator and FIG. 2 which is a longitudinal sectional view thereof, a refrigerator formed of an outer box (2) filled with a heat insulating material between the inner box and the inner box (not shown). A step part (3a) projecting inward from the outer box bottom plate (3) is formed in the lower part of the back surface of the main body (1), and a predetermined depth and height dimension extending in the width direction is formed by the step part (3a). The space of the machine room (4) having

  The machine room (4) is provided with a compressor base (5) made of a rigid steel plate on the bottom surface thereof, and the compressor (6) for supplying the refrigerant to the cooler for cooling the storage room is provided with the machine room (4 ) And is attached to the comp table (5) via a cushion body. The other space side from the compressor (6) serves as a heat radiating duct, a condenser (7), a heat radiating fan (8) for introducing outside air into the machine room (4), an evaporating dish (9) for evaporating defrost water, etc. Is installed.

  The condenser (7) is a part of the refrigeration cycle, receives high-temperature and high-pressure refrigerant gas from the compressor (6), dissipates heat, and condenses, and the refrigerant from the condenser (7) is a decompression pipe. It is supplied to a refrigeration or refrigeration cooler in each storage chamber via a capillary tube, and is configured to cool the storage chamber to a predetermined air temperature by evaporating. A flat plate formed by welding wires as heat radiating fins is superposed in three layers and is erected on the back of the machine room (4).

  The heat radiating fan (8) forms a slight gap with the step (3a) of the bottom plate, the peripheral edge contacts the upper and lower surfaces of the machine room (4), and the left and right portions contact the step (3a). It is attached to the bell mouth of the fan casing (10) that is installed so as to be in contact with the inside and outside of the machine room (4), and is arranged so that the axial flow is in the front-rear direction of the machine room (4). Yes.

  A compressor base (5) in front of the lower end of the fan casing (10) to which the heat radiating fan (8) is attached has an air intake port (11) formed of a plurality of openings over the width of the fan casing (10). Has been established.

  At the rear of the heat radiating fan (8), the three-layer flat condenser (7) is arranged so as to face the condenser (7) with its lower end opposed to the heat radiating fan (8). Is extended up from the machine room (4) so as to extend along a recess (12a) formed in the outer box rear plate (12).

  As shown in the perspective view of FIG. 3, the back of the machine room (4) is covered with a back grille (13) made of a thin steel plate, and this back grill (13) is the upper end of the condenser (7). It is arranged so as to cover up to the upper part, and an opening is formed between the outer box rear plate (12) at the upper end, and the rear plate recessed portion (12a) and the rear grille (13) provided with a condenser (7) An air outlet A (13a) connected to the duct (14) to be formed is formed.

  An evaporating dish (9) for receiving defrosted water from a cooler (not shown) and storing and evaporating is disposed on the compressor base (5) below the heat radiating fan (8) and the condenser (7). Yes. The evaporating dish (9) is configured such that a discharge pipe (15) from the compressor (6) is extended in the evaporating dish (9) so that the defrosted water is evaporated by high-temperature refrigerant heat.

  Further, a recess (12a) on the rear plate located above the compressor (6) adjacent to the condenser (7) has a power supply circuit, inverter switching circuit, motor control circuit, rectifier circuit for controlling the operation of the refrigerator. Etc. are arranged along the outer box rear plate (12), and the outer surface is covered with the cover body (16), and the arrangement portion of the high voltage component on the upper part is also described above. In consideration of heat conduction from the back grille (13), it is covered with a cover member (17) made of synthetic resin.

  The components such as the compressor (6), the condenser (7), and the printed wiring board in the machine room (4) are arranged as described above, and when the heat radiating fan (8) rotates, the components shown in FIG. As indicated by the arrows, outside air in front of the refrigerator is sucked from the suction port (11) through the bottom of the main body and blown out from the bell mouth portion into the machine room (4).

  The air blown into the machine room (4) by the heat radiating fan (8) is sent rearward along the axial flow, but hits the rear grille (13), and a part of it is guided upward to the rear plate Into the duct (14) formed by the recess (12a) and the rear grille (13), and exchanges heat with the condenser (7) by the high wind speed blown directly from the fan and the low external temperature. It cools and the air after heat exchange flows out from the air outlet A (13a) at the upper end of the rear grille (13). In particular, the condenser (7) has a large heat exchange air volume due to a high wind speed, unlike the case where the conventional arrangement of the heat dissipating fan on the suction side results in insufficient wind power and a portion where heat exchange is not possible due to a large surface area. Therefore, the condenser (7) itself can be made compact.

  At the same time, part of the blown-out air is shunted toward the center of the main body by abutting against the rear grille (13). After exchanging heat with the compressor (6) and dissipating heat, the side of the rear grille (13) It flows out to the outside from the drilled air outlet B (13b). Since the air flow in this case is also blown air from the fan (8), the wind speed is high, and the air temperature is not yet exchanged heat with the heat dissipating parts as compared with the conventional one. 6) The heat radiation efficiency of the condenser (7) can be increased, the power consumption can be reduced by an effective refrigeration operation, and the printed wiring board can be effectively cooled by a part of the divided air flow. Can do.

  At this time, the rotating shaft of the heat radiating fan (8) is made to coincide with the longitudinal direction of the machine room (4), and the casing dimensions including the fan diameter are compared with the configuration along the width direction of the conventional machine room. Since the depth dimension is not affected, the depth dimension for installing the heat radiating fan (8) can be reduced, and the volume of the machine room (4) can be greatly reduced.

For the evaporating dish (9), both the air to the compressor (6) and the condenser (7) flow through the upper part, and the discharge pipe (15) disposed inside the dish. The defrosted water is effectively evaporated in combination with the heat and the high temperature atmosphere in the machine room (4) by the compressor and the condenser.
In addition, the refrigerant | coolant pipe which passed through the condenser (7) from the evaporating dish (9) part is approached into the back surface from the lower end of the outer case rear plate (12) covered with the condenser (7), and the rear plate (12 ) In an annular shape along the heat insulating material side, so that the auxiliary condensation pipe (18) performs a heat dissipation action, and this portion is the air outlet A (13a) at the upper end of the rear grille (13). ) On the upper air blowing path, a good heat exchange effect due to the wind speed can be obtained, and the condenser (7) can be made more compact.

  The back grille (13) has a screw (19) fastened by using a boss (16a) formed on a cover body (16) covering the outer surface of the printed wiring board at a substantially central portion of the surface. Even if the rear grille has a large surface area, the surface amplitude due to the vibration of the grill plate can be reduced by fixing the center part of the rear grille, and the occurrence of noise can be suppressed by eliminating contact with vibrating parts such as piping. Can do.

  With the above configuration, the compressor (6), the condenser (7), the heat radiating fan (8), the evaporating dish (9), the printed wiring board and the piping of each refrigeration cycle in the machine room (4) are effective including the heat radiation efficiency. Therefore, the space in the machine room can be made compact, the volume can be reduced as compared with the conventional case, and the storage capacity in the storage chamber can be increased accordingly.

  Thus, the condenser (7) made of the three-layer plate-like body is along the plane of the condenser (7) as shown in the perspective view of FIG. 4 in the disassembled state and in FIG. It is attached to the main body via a fixed plate (20) formed of a plate-like body having a size.

  This fixed plate (20) is an injection-molded synthetic resin molded body, and is provided with a hook (20a) for temporary fixing to the outer case rear plate (12) above the center of the plate surface. A plurality of locking ribs (20b) for locking the left and right bent portions of the meanderingly formed three-layer condenser pipe (7a) while maintaining the interval between the layers are provided so as to project from the lower portion to the lower portion. Moreover, the fixing | fixed part (20c) which fixes a condenser (7) to a main body side with the fixing plate (20) is provided in the upper part of both sides.

  The fixing portion (20c) includes a metal engagement member for locking and fixing the screw through hole (20d) for fixing the fixing plate (20) itself to the outer casing rear plate (12) and the condenser pipe (7a). The engaging piece (20e) of the stop hook (21) is integrally formed, and the engaging hook (21) includes an engaging piece (21a) of the condenser pipe (7a) and an engaging piece of the fixing portion. A base portion (21b) is formed with a through hole for a screw that engages with (20e). Furthermore, the position corresponding to the inlet pipe (7b) of the condenser (7) on one side of the fixed plate (20) is overmolded to form a pipe support (20f).

  When the condenser (7) is fixed to the main body side, both sides of the condenser pipe (7a) made up of three layers of wire capacitors in advance as shown in FIG. 6 which is a cross-sectional view taken along line AA in FIG. The straight portion in the vicinity of the bent portion is fitted into the locking rib (20b) extending up and down on both sides of the fixed plate (20) to be incorporated into the fixed plate (20) and substantially integrated, and this condenser (7) The fixing unit (20) assembly unit is locked to the hook portion of the outer casing rear plate (12) by using the hook portion (20a) of the fixing plate (20), and temporarily fixed together with positioning.

  Thereafter, as shown in FIG. 7 which is a cross section taken along the line BB of FIG. 5, the locking portion (21a) is the condenser pipe (7a), and the base portion (21b) is the fixing portion (20c) of the fixing plate. The condenser hook (21) is screwed onto the rear plate (12) of the outer box reinforced with the fixing portion (20c) by the screw through hole (20d). Is fixed to the main body. At this time, the locking portion (21a) of the pipe (7a) in the locking hook (21) has different protruding portions on the left and right sides of the fixing plate (20), so that it can be fixed more reliably without rattling. Like that.

  Furthermore, the inlet pipe (7b) of the condenser (7) is sandwiched between metal supports (22), pressed and held in a positioned state, and the outer box via the pipe support (20f) of the fixed plate (20). The inlet side of the condenser (7) is fixed by screwing together to the angle reinforcing plate (23) located on the heat insulating material side of the rear plate (12) on the back side, and the lower side of the fixing plate on the other side is the outer plate rear plate By fixing to (12), the condenser (7) is firmly fixed to the main body side together with the fixing plate (20).

  With the above-described configuration, the condenser (7) is held by the fixing plate (20) without contacting each other with the wire ribs formed in the three layers by the locking rib (20d). Since the hook (20a) can be locked to the hook of the rear box rear plate (12), positioning and temporary holding to the main body is possible, and the screw fixing work by the fixing part (20c) is easy even for one worker. it can. At this time, the locking hook (21) and the support (22) that are fixed to the main body with screws are made of metal, so it is possible to prevent the occurrence of noise due to deterioration over time and leaning like a synthetic resin. Therefore, quality can be maintained without deformation.

  Further, the inlet pipe (7b) to the condenser is fixed to the angle reinforcing plate (23) on the main body side via the fixing plate (20) by the support (22), so that the vibration of the compressor (6) is reduced. The sensitive inlet pipe (7b) can be firmly fixed, and vibration from the compressor (6) is absorbed by the inlet pipe (7b) and transmitted to the condenser pipe (7a) downstream of the cycle. Therefore, the vibration of the condenser (7) portion can be greatly reduced and the generation of noise can be suppressed in combination with the fixing of each portion of the condenser pipe (7a) by the fixing plate (20). And since generation | occurrence | production of a vibration of a condenser pipe (7a) can be suppressed, the main condenser (7) is arrange | positioned upstream from the auxiliary | assistant condensation pipe (18) arrange | positioned at the heat insulating material side of an outer case (2). The size of the condenser itself can be reduced by increasing the heat radiation efficiency.

  In the above embodiment, the wire condenser type condenser has been described. However, the present invention is not limited to this, and the present invention may be applied to a spiral pipe or a fin tube type condenser.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator which reduced the piping vibration sound in a machine room.

It is a perspective view of the machine room part of the refrigerator which shows one Embodiment of this invention. It is a longitudinal cross-sectional view of the machine room part of FIG. It is a perspective view from the back which shows the state which attached the back cover to FIG. It is a perspective view which shows the decomposition | disassembly state of the condenser and fixing plate in FIG. It is a front view which shows the assembly state of the condenser and fixing plate of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Outer box 3 Outer box bottom plate 4 Machine room 5 Comp stand 6 Compressor 7 Condenser 7a Condenser pipe 7b Inlet pipe 8 Radiating fan 9 Evaporating dish 11 Outside air inlet
12 Outer box rear plate 12a Recess 13 Back grill
13a Air outlet A 13b Air outlet B 14 Duct
15 Discharge pipe 16 Cover body 16a Boss
18 Auxiliary condensing pipe 20 Fixed plate 20a Hook
20b Locking rib 20c Fixed part 20d Screw hole
20e Engagement piece 20f Pipe support 21 Locking hook
21a Locking part 21b Base 22 Support
23 Angle reinforcement plate

Claims (6)

A machine room formed in the lower back of the refrigerator main body, a compressor installed in the machine room, and a flat plate-like shape installed along the back of the machine room so as to dissipate heat by introducing refrigerant discharged from the compressor. Having a condenser and a plate-like fixing plate made of a resin molded product,
The fixing plate is disposed along the plane of the condenser, and engages with both ends of the condenser in the machine room width direction to form an assembly unit integrated with the condenser.
The refrigerator is characterized in that the assembly unit is fixed to the refrigerator body in a state of being temporarily fixed to the refrigerator body with the fixing plate facing the refrigerator body.   2. The refrigerator according to claim 1, wherein the condenser is fixed to the fixed plate, and an inlet pipe to the condenser is fixed to the main body through the fixed plate.   The condenser is formed into a multi-layered plate-like body with a wire capacitor in which a heat dissipation wire is welded to a meandering pipe, and the vicinity of the bent part of the pipe on both sides is engaged with the locking rib of the fixed plate, and is fixed to the main body side. The refrigerator according to claim 1, wherein the refrigerator is screwed through a metal locking member mounted on a fixed plate.   The fixing plate substantially integrated with the condenser is temporarily fixed by locking a hook portion formed at a central portion in the width direction at an upper portion thereof to the main body side. The refrigerator described.   The refrigerator according to claim 2, wherein the inlet pipe to the condenser is fixed to the reinforcing plate portion on the main body side through a fixed plate. A machine room formed at the lower back of the refrigerator body, a compressor installed close to one of the machine rooms in the width direction, and an outer box rear plate on the other side of the machine room in the width direction. A flat condenser standing along the back wall in the duct formed by the cover that covers the back of the machine room, and the axial flow facing this condenser is arranged in the front-rear direction of the main body. A fan that blows air sucked from the bottom of the main body to the compressor and partly divides and heat-exchanges with the condenser and flows upward, and a plate-like fixing plate made of a resin molded product,
The fixing plate is disposed along the plane of the condenser, and engages with both ends of the condenser in the machine room width direction to form an assembly unit integrated with the condenser.
The refrigerator is characterized in that the assembly unit is fixed to the refrigerator body in a state of being temporarily fixed to the refrigerator body with the fixing plate facing the refrigerator body.

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