WO2006137422A1

WO2006137422A1 - Refrigerator

Info

Publication number: WO2006137422A1
Application number: PCT/JP2006/312379
Authority: WO
Inventors: Tadahiro Kawamura; Yoshiki Oohashi
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2005-06-22
Filing date: 2006-06-21
Publication date: 2006-12-28
Also published as: JP3824010B1; CN101156035A; CN101156035B; TW200710357A; TWI354760B; JP2007003067A

Abstract

A refrigerator in which a cutout is provided at a portion corresponding to a machine room of an outer box, a resin-made outer shell of the machine room is engaged with the cutout, and a compressor, a condenser, a fan for forced cooling, etc. are placed on the outer shell. Because a machine room portion for receiving the compressors etc. and having an irregular complex shape can be integrally formed by resin molding separately from other portions, workability is improved and assembly accuracy is increased. Further, since the resin-made outer shell of the machine room of the different material from the outer box, which is made of steel plate, are joined, transmission of noise and vibration of the compressor and the fan to a refrigerator body is suppressed.

Description

Technical field

[0001] The present invention relates to a refrigerator in which a compressor is placed on a top surface.

Background art

[0002] In recent years, refrigerators are required to improve the usability and storage properties as the power of the viewpoint of protecting the global environment further increases in energy saving. Conventionally, this type of refrigerator is provided with a recess that is recessed so that the upper back of the storage chamber of the heat insulation box is lowered for the purpose of increasing the storage capacity of the storage chamber disposed at the bottom, A method of storing the components constituting the refrigeration cycle in the recess was employed. An example of a refrigerator having such a configuration is disclosed in Japanese Patent Laid-Open No. 2001-99552.

FIG. 8 is a cross-sectional view of a conventional refrigerator. Fig. 9 is a perspective view of the main part of a conventional refrigerator as viewed from the rear. The refrigerator shown in the figure includes an outer box 2 that is generally formed of a steel plate that forms the outer wall of the heat insulating box 1, and an inner box 3 that is generally formed of greaves that forms the inner wall of the heat insulating box 1. It has a foamed urethane insulation 4 filled between the outer box 2 and the inner box 3, a refrigerator compartment 5, a freezer compartment 6, and a vegetable compartment 7, and the refrigerator compartment 5 rotates at the front opening of the refrigerator compartment 5. Door 8 is provided. In addition, the freezer compartment 6 and the vegetable compartment 7 where the central force of the heat insulation box 1 is also located in the lower part have a drawer type freezer compartment drawer door 9 and a vegetable compartment drawer that can be easily removed in consideration of storage and convenience. Door 12 is provided.

[0004] The recessed portion 20 provided in the heat insulating box 1 is a portion where the top rear portion over the upper surface 21 of the outer box and the rear surface 22 of the outer box is recessed so that the uppermost rear portion of the refrigerator compartment 5 is lowered. . The left and right sides of the recess 20 are closed by the left and right walls 23 and 24 of the heat insulation box 1 and open upward and backward. The open portion of the recess 20 is covered with a recess cover 27 including an upper plate 25 and a back plate 26 substantially perpendicular to the upper plate 25. The recess cover 27 is detachably fixed to the steel plate of the outer box 2 with screws or the like.

[0005] A compressor 31 and a condenser 32, which are components constituting the refrigeration cycle, are both disposed so as to be accommodated in the recess 20, and a machine room fan for cooling the condenser provided to face the front surface of the condenser 32. It is covered with a concave cover 27 together with 33.

[0006] The compressor 31 is directly supported and placed on the bottom wall in the recess 20 via an elastic member or the like, and the machine room fan 33 is also directly supported on the front wall in the recess 20.

[0007] In addition, the upper plate 25 and the back plate 26 of the recess cover 27 are provided with a plurality of vent holes 34 and 35 for heat dissipation, respectively. From these arrangements, the vent 34 opened in the upper plate 25 functions as an intake port, and the vent 35 opened in the back plate 26 functions as an exhaust port. The evaporator 36, which is a component of the freezing site, is disposed along with the cooling fan 37 at the back of the freezer compartment 6, and the vegetable compartment 7, which is the lowest storage compartment, has a deep depth.

[0008] Thereby, as compared with a configuration in which the compressor 31 and the condenser 32 are housed in the lower back portion of the heat insulating box 1, the vegetable chamber 7 can be configured to have a deeper internal volume. In addition, a recessed part 20 serving as a receiving part for high-voltage equipment is provided in the space at the back of the top where the user's hands can reach to avoid using it. Even if it is placed at the top of 1, the use of the refrigerator compartment 5 which is the uppermost storage room does not substantially impair the use!

However, in the conventional configuration described above, the heat insulation box 1 is directly recessed to form the recess 20, so that a relatively large high-pressure device such as a compressor 31 is accommodated. When the left and right walls 23 and 24 are provided on both sides of the recess 20, there are the following problems. In particular, it is considerably difficult to manufacture by integrally drawing the steel plates on the outer case upper surface 21 and the outer case rear surface 22 or bending and joining the steel plates on the outer case upper surface 21 and the outer case rear surface 22. Therefore, workability is poor and manufacturing costs are increased. In addition, since the inner wall of the recess 20 serves as the surface of the outer box 2 of the heat insulating box, the compressor 31 and the machine room fan 33, which are noise and vibration sources, are directly supported on the outer box 2. These noises and vibrations are transmitted through the recess 20 into the refrigerator compartment 5 and other compartments, and particularly when the user opens the refrigerator compartment door 8, they easily leak to the front side of the refrigerator. As a result, the compressor 31 and the machine room fan 33, which are the sources of noise and vibration, are located close to the height of the human ear in height. Furthermore, vibration is easily transmitted when touching the refrigerator rotating door 8 that is rotatably supported by the heat insulating box 1 by a hinge mechanism when the door is opened and closed. Then, there is a problem that the refrigerator body resonates and propagates to other parts (for example, food storage shelves in the refrigerator compartment 5), and a resonance sound is generated due to the vibration of the parts.

[0010] Further, the housing 31 such as the compressor 31, the condenser 32, the machine room fan 33, etc. Since mounting is performed directly on the inner wall surface of the recess 20, there is a tendency for mounting variations that cause poor workability including positioning of parts. As a result, it may cause noise and vibration, and there is a problem.

[0011] In addition, the frame of the heat insulating box 1 includes, for example, an outer box 2 made of a steel sheet of about 0.5 mm, an inner box 3 made of thin ABS grease of about 2 mm, an outer box 2 and an inner box 3. It has a three-layer structure consisting of urethane foam insulation material 4 that fills the interior of However, the upper part of the heat insulation box 1 is not rectangular but deformed due to the recess 20, so that the strength may be insufficient. Therefore, when the compressor 31 and the machine room fan 33 are operated, if the vibration caused by these propagates directly to the heat insulating box 1, the resonance noise may be further increased.

[0012] In addition, if the peripheral strength of the recess 20 is insufficient, the attachment strength of the handle necessary for transporting the refrigerator body becomes insufficient, and it is difficult to ensure safety during transport. is there. In addition, the arrangement relationship between the condenser 32 and the machine room fan 33 in the recess 20 and the arrangement relationship between the intake vent 34 and the exhaust vent 35 are arranged in the depth direction of the recess 20. The space in the recess 20 is not effectively utilized. Furthermore, the heat radiation efficiency in the recess 20 cannot be sufficiently increased, including the cooling effect of the compressor 31 by the machine room fan 33, and heat leakage into the refrigerator compartment 5 due to the temperature rise in the recess 20 There is a possibility that the energy saving effect will occur.

[0013] When connecting the refrigerant pipes of the refrigeration cycle to the compressor 31 and the condenser 32 accommodated in the recess 20, the refrigerant pipes are penetrated through the steel plates on the outer case upper surface 21 and the outer case rear surface 22. There is a problem that refrigerant pipes are not sufficiently fixed and sealed, and damage to refrigerant pipes is broken, and urethane foam insulation 4 leaks, etc. Disclosure of the invention

[0014] The present invention comprises an outer box, an inner box, a heat insulating box made of a heat insulating material provided between the outer box and the inner box, and a rear top surface of the heat insulating box is recessed to the inside of the cabinet. Provided is a refrigerator having a formed machine room and a compressor for a refrigeration cycle housed in the machine room, wherein the outer box is formed of a metal plate, and the outer wall of the machine room in which the compressor is placed is formed of grease. . As a result, it is possible to separately form a machine room portion having a deformed and complicated shape for accommodating the compressor by integral molding with a resin molding. In this assembly process, workability and assembly accuracy can be improved by simplification. In addition, the rigidity of the machine room outer casing resin molding and the bonding structure with the outer box are made appropriate, so that the rigidity is increased and the material is different from that of the outer box made of a metal plate represented by a steel plate. It is possible to suppress the noise and vibration of the compressor from propagating to the refrigerator body by joining the outer casing of the oil molding machine.

Brief Description of Drawings

FIG. 1 is a perspective view of a machine room of a refrigerator in Embodiment 1 of the present invention.

2 is an exploded perspective view showing an assembled state of the machine room of the refrigerator shown in FIG.

FIG. 3 is a perspective view showing a state in which the machine room of the refrigerator shown in FIG. 1 is covered with a machine room cover.

FIG. 4 is a front view of the refrigerator shown in FIG.

FIG. 5 is a cross-sectional view taken along line 5-5 shown in FIG.

FIG. 6 is an exploded perspective view showing an assembled state of the machine room of the refrigerator in the second embodiment of the present invention.

FIG. 7 is an exploded perspective view showing an assembled state of the machine room of the refrigerator according to Embodiment 3 of the present invention.

FIG. 8 is a cross-sectional view of a conventional refrigerator.

FIG. 9 is a perspective view of main parts of a conventional refrigerator as viewed from the rear.

Explanation of symbols

[0016] 101 refrigerator body

102 Insulated box

113 Machine room

114 Machine room outline

114A, 114B, 114C Machine room outer wall

114D, 114E, 114F Machine room outer flange surface

115, 301 outer box

115A, 303 Top panel

115B, 305 Side plate 115C, 304 Back plate

116, 116A, 116B Notch

117 Flat part

118 Reinforcement structure

119 space

120 reinforcement

121 Foam insulation

122 Compressor

123 Precooled condenser (Condenser)

125A, 125B, 125C Refrigerant piping

126 Evaporator

127A, 127B, 127C Communication groove

128 blower

129 First compartment

130 Second compartment

131 Outer casing

132 steps

133 Mounting plate

137 Reinforcing plate

138 Machine room cover

139A, 139B Exhaust port

139C, 139D Air intake

140 Connecting member (handle)

150 inner box

201, 202 Vacuum insulation

302 recess

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention relates to heat insulation comprising an outer box, an inner box, and a heat insulating material provided between the outer box and the inner box. It has a box, a machine room formed by denting the back of the top surface of the heat insulation box inside, and a compressor of a refrigeration cycle housed in the machine room. The outer box is made of a metal plate and compressed. A refrigerator is provided in which the outline of the machine room in which the machine is placed is formed of grease. Machine parts with irregular and complex shapes that accommodate the compressor can be separately formed by resin molding, and the assembly process of the machine rooms can be simplified to improve workability and assembly accuracy. It is possible to rationally realize a high-quality refrigerator with a compressor placed at a lower cost. In addition, by making the reinforcement structure in the resin molding of the outer shell of the machine room and the joining structure with the outer box appropriate, the rigidity is increased and the resin molding machine room is made of a material different from that of the metal plate outer box. By joining the outer shell, vibration propagation is attenuated, and the noise and vibration of the compressor are suppressed from propagating to the refrigerator body. Even if it is placed in the compressor top arrangement type refrigerator, it can wipe out the discomfort of users and residents. In addition, by adopting a configuration in which the outer casing of the machine room is separately molded integrally with resin and joined to the outer box of the refrigerator body, the machine room part can be shared and standardized even between products with different refrigerator external shapes in the manufacturing process. There is a possibility of achieving this. In addition, depending on how the manufacturing process is devised, parts such as a compressor are preliminarily assembled on the outer periphery of the machine room that has been molded with a resin, and preliminarily assembled. It is also possible to connect the refrigerant pipes, etc. by attaching them to the box, and connecting them with refrigerant pipes, etc., and improving the productivity by further rationalizing the manufacturing process. Manufacturing costs can be reduced.

[0018] Furthermore, the present invention provides a refrigerator in which a blower that forcibly cools the compressor is further housed in the machine room, and the blower is fixed to the outer wall of the machine room formed of resin. In this way, by attaching a blower with a motor or fan that is the drive part as well as the compressor to the outer casing of the resin molding machine, the vibration propagation to the refrigerator body is attenuated, avoiding the vibration of the internal parts etc. be able to. Further, since the blower itself can be assembled in advance in the outline of the machine room, a machine room having a forced cooling function of the compressor can be rationally formed.

[0019] Furthermore, the present invention provides a refrigerator in which a condenser connected to a compressor and a refrigerant pipe is further accommodated in a machine room, and the condenser is forcibly cooled by a blower. In this way, the frozen rhino By simultaneously storing a part of the condenser, which is a high-pressure device of Kuru, the forced ventilation effect of the blower can also be used for forced cooling of the condenser. A room assembly can be constructed.

[0020] Further, if a part of the condenser to be accommodated is a pre-cooling pipe that is directly connected to the discharge side of the compressor, even if there is no large space, a considerable sensible heat component can be obtained by using the forced ventilation action of the blower. Heat release can be promoted. Furthermore, when the condenser piping following this precooling piping is thermally conductively arranged on the inner surface of the outer box of the heat insulation box, the temperature of these piping can be reduced and the surface temperature of the outer box can be lowered. It is possible to reduce discomfort caused by touching the user.

[0021] Further, according to the present invention, the blower is disposed between the compressor and the condenser, the machine room is divided into left and right by the blower, and the first compartment that houses the compressor with the blower interposed therebetween and the condenser are accommodated. Provide a refrigerator in which a second compartment is formed. In this way, it is possible to place a condenser upstream of forced ventilation and a compressor on the downstream side with the blower in the middle, and avoid the high heat of the compressor from hindering the heat dissipation of the condenser, while avoiding the compressor and condenser. Both can enjoy the forced cooling effect. In addition, by arranging the compressor and the condenser on the left and right with the blower in the middle, the compressor is unevenly distributed on one side of the center of the refrigerator body in the width direction. As a result, especially in refrigerators that have double doors in the storage room at the top of the main unit, the position where the compressor is located is the position where the double doors are joined, and the projection is viewed from the front of the door on one side. The position will fit in. The closer the joint between the two doors of the BIPARTING TYPE is, the more the compressor shakes due to the impact of closing the door, and the internal mechanism of the compressor collides with the compressor container, producing sound. There are concerns. However, according to the present invention, since the impact can be avoided, it is possible to prevent the user from feeling unpleasant noise.

[0022] Further, according to the present invention, the blower has an outer shell made of resin, and the outer shell made of resin is engaged with the outer shell of the machine room formed of the resin, so that the first compartment and the second compartment Provide a refrigerator with a space between the two. In this manner, a beam is formed by joining the outer casing made of resin in the machine room and the outer casing made of resin in the blower at the middle portion in the width direction of the machine room. Increases rigidity in the width direction and suppresses vibration and noise transmission of the blower itself and the compressor Can do.

[0023] Furthermore, the present invention provides a refrigerator in which a step portion in the height direction is formed between a first compartment and a second compartment. In this way, by focusing on the difference between the height space necessary for housing the compressor and the height space necessary for housing the condenser, by suppressing the height space of the second compartment containing the condenser, A rigidity-enhanced portion can be formed at the intermediate portion in the width direction of the chamber, and the rigidity in the width direction of the machine room outer shell can be increased to suppress the vibration and noise transmission of the compressor and blower.

[0024] Furthermore, the present invention provides a refrigerator in which the outer shell of the machine room is formed of a resin having a substantially L-shaped cross section having a front wall, a bottom wall, and both side walls. It is possible to increase the structural strength of the machine room outer shell itself made of grease, and to have a base configuration that suppresses vibrations and noise transmission of the compressor and blower.

Furthermore, the present invention provides a refrigerator in which a flange surface is provided on the end surface of each wall of the outer wall of the machine room.

Rigidity can be strengthened by bending the wall end faces of the machine room outer wall as they are, and it is possible to suppress vibration and noise transmission of the compressor and blower in the joint structure with the refrigerator body. .

[0026] Furthermore, the present invention provides a refrigerator in which a notch is provided in a portion corresponding to the machine room of the outer box, and the outer wall of the machine room formed of resin is engaged with the notch. In this way, by cutting out the part corresponding to the machine room of the outer box in advance, it is possible to reduce the difficulty of the plating process that does not require the outer box to form a deformed and complex shape of the part equivalent to the machine room. As a result, the steel plate, which is a metal plate, can be rationally formed without the need for expensive deep drawing materials.

[0027] Furthermore, the present invention provides a refrigerator in which a recess is provided in a portion corresponding to the machine room of the outer box, and the outer wall of the machine room formed of resin is superimposed on the recess. In this way, the mechanical room equivalent part has a double structure and the structural strength is increased, and if consideration is given to the joint structure of both via a flexible member etc., vibration and noise transmission of the compressor and blower can be further improved. It is possible to suppress it. In addition, it is not a method of notching a machine room outer wall by notching a part corresponding to the machine room, so there is no need to worry about the seal structure at the joint at the periphery of the notch! [0028] Furthermore, the present invention provides a refrigerator in which an outer box is formed by integrally bending at least both side plates and a top plate with metal plates. As a result, it is possible to construct an outer box in which the notch portion corresponding to the machine room is formed in a rational manner.

Furthermore, the present invention provides a refrigerator in which an outer box is formed by joining at least both side plates and a top plate with separated metal plates. In this way, the degree of freedom in forming the outer box is expanded, and when the notch portion corresponding to the machine room is provided, it is sufficient to adjust the length of the top plate that does not require the notch formation. In addition, if the top plate corresponding to the machine room is bent in a step shape and joined to both side plates, a double-structure housing can be easily formed.

[0030] Further, the present invention provides a refrigerator in which the notch portion of the outer box is formed on the top plate while leaving flat portions on both sides. In this way, when the top plate and both side plates are folded together, the folded portion is formed over the entire length in the depth direction without damaging or damaging the side plates, etc. be able to. Moreover, when joining the outer shell of the machine room formed with the resin, it can be the structure of the joining partner on both sides.

[0031] Furthermore, the present invention provides a refrigerator having a reinforcing structure on the top plate at the peripheral edge of the notch of the outer box. In this way, it is possible to increase the strength of the end face of the flat plate, prevent undulations, and improve the bonding strength with the resin-molded machine room outline.

[0032] Furthermore, the present invention provides a refrigerator in which both side plates of an outer box and both side walls of an outer shell of a machine room are joined to face each other. In this way, the strength of the outer box on both sides of the machine room can be reinforced and vibration propagation to the machine room force outer box can be suppressed.

[0033] Furthermore, the present invention provides a refrigerator in which the flange surfaces of the outer side walls of the machine room are overlapped and joined to the flat portions of the outer box formed on both sides of the notch. In this way, it becomes easy to combine the joint portions on both sides of the outer box and the machine room outer shell, and joint strength can be increased.

[0034] Furthermore, the present invention provides a refrigerator in which both side plates of the outer box and both side walls of the outer casing of the machine room face each other with a space, and a heat insulating material is provided in the space. In this way, it is possible to reinforce the strength of the joint between the side plates and the side walls of the machine room outer shell. In addition, the transmission of noise from both side walls of the machine room can be attenuated to reduce the effect of noise on the outside of the compressor and blower. [0035] Furthermore, the present invention provides a refrigerator in which a foamed heat insulating material is filled and foamed between an outer box and an inner box, and a foamed heat insulating material is filled and foamed in the space. In this way, the rigidity of the joint between the side plates and the side walls of the machine room outer wall can be further increased, and the strength of the machine room side wall, which tends to be less rigid, can be further increased. It is possible to reduce the internal resonance sound caused by the vibration of the side wall due to the vibrations and noise transmission from the compressor and blower to the outside. In addition, it is possible to provide strength as a base for attachment of machine room covers and transport handles.

Furthermore, the present invention provides a refrigerator in which a reinforcing material is further provided in the space. In this way, when mounting the machine room cover, the handle for transportation, etc., it becomes a fixing member such as a screw stopper, and the base material that firmly attaches the handle that receives the load when installing the handle for transporting the refrigerator It can be done.

[0037] Further, the present invention provides a refrigerator further provided with a connecting member for connecting reinforcing members provided on both sides. In this way, deformation in the width direction of both sides of the machine room can be prevented, and the rigidity of the machine room part can be further enhanced to provide a structure effective as a countermeasure against vibration and noise and as a reinforcement measure during refrigerator transportation.

[0038] Furthermore, the present invention provides a refrigerator using a connecting member as a handle for carrying the refrigerator. In this way, it becomes a rational structure that can share the handle for transportation along with the reinforcement measures in the width direction of the outer shell of the machine room.

[0039] Furthermore, the present invention provides a refrigerator having a reinforcing plate on the back surface of the bottom wall of the outer wall of the machine room on which the compressor is placed, and the compressor being supported and fixed on the reinforcing plate. In this way, the support base of the heavy compressor is not dependent only on the outer casing made of resin, but is backed up with a reinforcing plate such as a relatively thick metal plate to increase the support strength and suppress vibration transmission can do. Moreover, if the lower part of the reinforcing plate is tightly joined with foam insulation, vibration transmission can be further attenuated.

[0040] Further, the present invention provides a refrigerator having a mounting plate on which a compressor is mounted, and the compressor being supported and fixed on a reinforcing plate via the mounting plate. In this way, the compressor can be pre-assembled on the mounting plate, and if this assembly is fixed together with the mounting plate to the reinforcing plate with screws, etc., it is possible to suppress subtle variations in the compressor's mounting accuracy. Compressor can be placed well and vibration expansion Major factors can be suppressed. In addition, since the legs of the compressor are supported and fixed on the mounting plate in advance, workability is good and reliable support can be achieved.

[0041] Further, the present invention further includes a machine room cover provided with an air circulation port between the machine room and the outside, and is engaged with an outer wall of the machine room formed of grease to cover the open surface of the machine room. Provide a freezer. In this way, since the outer wall of the machine room is made of resin, it is possible to easily form an engagement structure that fits the machine room cover. It is possible to avoid adverse effects due to the intrusion of foreign matter such as dust, insects and moths. Further, it is possible to prevent the transmission of noise to the outside.

[0042] Further, the present invention provides a refrigerator in which a circulation port of a machine room cover includes an exhaust port provided in a first compartment and an intake port provided in a second compartment. In this way, the width direction of the machine room can be effectively used as a convection passage for heat radiation, and heat radiation efficiency can be maximized.

Furthermore, the present invention provides a refrigerator in which a machine room cover is fixed to a reinforcing material. In this way, since the attachment strength of the machine room cover can be increased, it is possible to suppress the generation of resonance noise due to the resonance of the machine room cover due to the vibration of the compressor or blower.

[0044] Furthermore, the present invention provides a refrigerator in which a communication groove of a refrigerant pipe is formed in an outer wall of a machine room. In this way, the refrigerant piping connected to the compressor and the condenser can be clearly positioned so that the heat insulation box and the machine room communicate with each other, improving assembly workability and accuracy, and leaking foam insulation Such a structure can also be reliably performed.

[0045] Further, in the present invention, a vacuum heat insulating material is attached to both side plates of the outer box, and the vacuum heat insulating material is extended into a space between both side plates of the outer box and both side walls of the machine room outer shell. Provide a refrigerator. In this way, it is possible to further enhance the strength of both side walls of the machine room outer shell and the noise transmission preventing effect. Concerning noise transmission, a vacuum insulation material with a different or different structure as the core material is made of a foamed insulation material such as urethane and a multi-layer structure to increase the attenuation effect on noise transmission and to make sound insulation with a single material Compared with, noise in a wider frequency range can be attenuated. As a result, leakage of noise transmitted to the outside can be reduced, and noise in the refrigerator can be reduced. [0046] Furthermore, the present invention provides a refrigerator in which a vacuum heat insulating material is attached to the back surface of the outer shell of the machine room. In this way, it is possible to effectively increase heat leakage from the inside of the machine housing the equipment that generates heat to the inside of the warehouse. Since the vacuum insulation can be pre-assembled in the machine room outline, the application site can be framed by resin molding, so the application accuracy is good and workability is good! In addition, it becomes easier to carry out the process of weaving the end of the vacuum insulation material so that it does not hinder the fluidity of the foam insulation material within the framework of the resin molding of the pasted part. Therefore, it is possible to increase the reliability of the heat insulation structure between the machine room and the cabinet, which requires a large heat insulation effect.

[0047] Furthermore, by using vacuum insulation material of different types or different structures as the core material, and a foamed insulation material such as urethane, and a multilayer structure, the attenuation effect against noise transmission is enhanced and sound insulation is achieved with a single material. Noise in a wider frequency range can be attenuated. As a result, the leakage of noise transmitted to the cabinet can be reduced, and the noise of the refrigerator can be reduced.

[0048] Hereinafter, an example of an embodiment of a refrigerator according to the present invention will be described with reference to the drawings. The drawing is a schematic diagram and does not show the positional relationship in terms of dimensions. Further, the same components as those of the previous embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In addition, this invention is not limited by this embodiment. The heat insulating material in the present invention includes a foam heat insulating material, a vacuum heat insulating material and the like.

[0049] (Embodiment 1)

A first embodiment of the present invention will be described with reference to FIGS. In the figure, the refrigerator main body 101 has a plurality of compartments in a heat insulating box 102. From the upper part, a refrigerator room 103, an ice making room 104, an ice making room 104, a multipurpose room 105, a vegetable room. 106 and the freezer compartment 107 are arranged in this order. The multipurpose room 105 is a temperature room switching room such as freezing, refrigeration, chilled, and partial freezing, or a storage room equipped with processing functions such as cooking, aging, thawing, drying, and heat retention.

[0050] A heat insulating door filled with a foam heat insulating material such as urethane is provided at the front opening of each storage chamber. The refrigerator compartment 103 is provided with double doors 108A and 108B. The ice making room 104, the multipurpose room 105, the vegetable room 106, and the freezer room 107 are each a drawer type. Doors 109, 110, 111 and 112 are provided. A machine room 113 is formed in a corner portion at the rear of the top surface of the heat insulation box 102 so as to protrude inward of the refrigerator compartment 103.

[0051] The machine room 113 is formed by engaging and joining an outer wall 114 of the machine room formed by resin molding in a form of being fitted into a notch 116 of an outer box 115 made of steel plate. The notch 116 is formed by lowering and joining the notch 116A in the region of the top plate 115A of the outer box and the upper end of the back plate 115C from the upper end of both side plates 115B of the outer box. Part 116B, and the upper and rear two directions are open.

[0052] The outer shell 114 of the machine room is formed of a resin having a L-shaped cross section having a front wall 114A, a bottom wall 114B, and both side walls 114C, as viewed from the front force of the refrigerator body 101. Bending flange surfaces 114D, 114E, and 114F are integrally formed on the end surfaces of the front wall 114A, the bottom wall 114B, and the side walls 114C, respectively. In this way, the flange surface is formed over substantially the entire circumference of the outer periphery 114 of the machine room. The outer case is configured by joining the flange surfaces 114D, 114E, and 114F and the peripheral end surface of the notch 116 of the outer case made of steel plate. In the top plate 115A of the outer box, the both sides of the periphery of the notch 116 are bent and formed from the side plates 115B with the flat portions 117 left. The flange surfaces 114F on both sides of the outer shell 114 of the machine room are joined so as to overlap with the flat surface portion 117. As a result, both side plates 115B of the outer box and both side walls 114C of the outer shell of the machine room face each other and are joined. The other flange surfaces 114D, 114E, etc. are joined so as to mesh with the end surface of the top plate 115A of the outer box 115 and the back plate 115C.

[0053] The top plate 115A at the peripheral edge of the notch 116 of the outer box is provided with a reinforcing structure 118. The reinforcing structure 118 is configured by providing a projection shape by pressing the top plate 115A, or by folding the end surface into a double structure.

[0054] Both side plates 115B of the outer box and both side walls 114C of the machine room outer wall face each other through the space 119, and a substantially L-shaped reinforcing material 120 is inserted into the space 119 to enclose the machine room outer wall. Both side walls 1 are fixed to the top and back of 14C.

[0055] The outer box 115 to which the machine room 113 is joined and the inner box 150 made of resin are joined to each other with a predetermined interval, and urethane is represented in this interval and the space 119 communicating with the outer case 115. The heat insulating box 101 is formed by filling and foaming the foam heat insulating material 121 as described above. The predetermined interval is It is determined appropriately according to the heat insulation specification. In the machine room 113, refrigeration cycle equipment, such as a compressor 122, a pre-cooling condenser 123 that is a part of the condenser, a dryer 124, and the like, are stored, and a refrigerant pipe that connects them is installed. Multiple in and out. In the present embodiment, the refrigerant pipe is a refrigerant pipe 125A extending from the pre-cooling condenser 123 to the condenser thermally disposed on the inner surface of the outer box 115, and thermally disposed on the inner surface of the outer box 115. The refrigerant pipe 125B extends from the condenser to the dryer 124, and the refrigerant pipe 125C extends from the evaporator 126 disposed below the refrigerator main body 101 mainly behind the freezer compartment 107 to the compressor 122.

[0056] The compressor 122 employs an internal low-pressure and reciprocating compressor that is easy to achieve low noise and low vibration in consideration of installation in the upper part of the refrigerator main body 101. In addition, isobutane, a flammable refrigerant with a low global warming potential, is used as the refrigerant in the refrigeration cycle from the viewpoint of global environmental conservation. Further, a communication groove of the refrigerant pipe is formed in the vicinity of the joint portion between the outer shell 114 of the machine room and the outer box 115. Respective refrigerant pipes 125A, 125B, and 125C are positioned and disposed in the communication grooves 127A, 127B, and 127C, and the through portions between the outer box 115 and the outer shell 114 of the machine room are sealed together.

[0057] In order to promote heat dissipation of the compressor 122 and the precooling condenser 123, which are high-pressure devices that generate heat, the blower 128 for forced ventilation is located at an intermediate position between the compressor 122 and the precooling condenser 123, that is, the machine. The chamber 113 is disposed at an intermediate position in the width direction. With the blower 128 in the middle, a precooling condenser 123 is arranged upstream of the forced ventilation, and a compressor 122 is arranged downstream. Thereby, the inside of the machine chamber 113 is divided into a first compartment 129 in which the compressor 122 is arranged and a second compartment 130 in which the precooling condenser 123 is arranged. The blower 128 is a motor-driven blower having an axial fan surrounded by a substantially rectangular parallelepiped outer shell 131. The blower outer shell 131 of the blower is engaged and fixed in a state where the front wall and the bottom wall of the peripheral wall are engaged with the outer shell 114 of the machine room when viewed from the front of the refrigerator.

A step 132 in the height direction is formed between the first section 129 where the compressor 122 is disposed and the second section 130 where the precooling condenser 123 is disposed. The height of the first compartment 129 in which the compressor 122 is accommodated is made larger than the height of the second compartment 130 in which the precooling condenser 123 is accommodated, and the height of the bottom wall in the machine room 113 is increased by the step 132. It is changing.

[0059] The compressor 122 housed in the first compartment 129 is provided from the front of the refrigerator main body 101. Placed in a position that fits within the projection plane of either one of the double doors 108A and 108B in the refrigerator compartment, that is, away from the position where the double doors 108A and 108B meet. Has been. The compressor 122 is supported by a leg 136 via an elastic member 135 on a support pin 134 standing on a relatively thick plate 133, and is fixed to the back surface of the bottom wall 114B of the outer wall of the machine room. The compressor 122 is supported and fixed on the reinforcing plate 137 via the mounting plate 133.

[0060] The machine room 113 is open at the top and rear, and the machine room cover 138 is attached to the machine room outer shell 114 so as to cover the open surface. The machine room cover 138 is made of resin and has an air circulation port between the machine room 114 and the outside. As shown in FIG. 3, the air circulation port faces the first compartment 129 in the machine room and has an exhaust port 139A on the upper surface of the machine room cover 138, an exhaust port 139B provided on the back surface, and a second air port in the machine room. An exhaust port 139C is formed on the upper surface of the machine room cover 138, and an intake port 139D provided on the back surface. In this way, the forced convection action by the blower 128 is performed in the direction from the second section 130 to the first section 129 in the width direction of the machine room 113. Further, the machine room cover 138 is fixed by screwing or the like to the reinforcing material 120 fixed at least on both side ends thereof in the both side walls 114C of the outline of the machine room. The upper front end portion and rear lower end portion of the machine room cover 138 are fixed to the outer shell 114 of the resin machine room with screws or the like. Further, the machine room cover 138 is attached with a connecting member 140 provided on both sides of the rear surface. The connecting member 140 is fixed so as to connect the reinforcing member 120 fixed in the both side walls 114C of the outer wall of the machine room through the machine room cover 138 and the outer wall 114 of the machine room. The connecting member 140 may be fixed to the reinforcing member 120 directly via the outer shell 114 of the machine room without using the machine room cover 138.

[0061] In the present embodiment, the connecting member 140 can be used as a handle for transporting the refrigerator by making the connecting member 140 strong enough to withstand the load during transport of the refrigerator and easily shaped.

[0062] The operation of the refrigerator configured as described above will be described below.

[0063] First, in forming the outer casing 115 made of steel plate, both sides of the plate 115B and the top plate 115A are cut with a pressing force on the portion corresponding to the top plate 115A. Punch out the notch 116A, leaving the flat part 117 in the part, and leave the flat part 117 on both sides Fold the face plate 115B part upside down. Next, the back plate 115C and the bottom plate (not shown), which are shorter than the side plates 115B, are joined together to form the outer case 115 as a casing. In this method, at least the side plate 115B and the top plate 115A are bent together, and the upper part of the back plate 115C is opened and joined to this. Especially, the notch 116 corresponding to the machine room is rationalized. It is effective in forming the target.

[0064] Further, since the notch 116A is formed by leaving the flat portions 117 on both sides, the top plate 115A and the side plates 115B are integrated with each other without causing distortion or damage to the side plates 115B during punching. In the case of being bent into two, the bent portion can be formed over the entire length in the depth direction to maintain the appearance. In addition, when joining the outer shell 114 of the resin-molded machine room, it can be the structure of the mating partner on both sides.

[0065] Then, the outer wall 114 of the machine room formed of grease is fitted into the notch 116 so as to be engaged, and the flange surfaces 114D, 114E, and 114F are fixed to the end surface of the outer box 115, respectively. A machine room 113 is formed at the rear of the top surface of the main body 101. These joints shall be provided with a sealing material to prevent foam insulation from leaking if necessary.

[0066] As shown in Fig. 2, the outer box 115 is previously provided on the inner surface with a heat conductive fixing member such as aluminum foil, and is provided with a refrigerant pipe serving as a condenser, with respect to the notch 116A. The ends of the pipes 125A and 125B are led out. The refrigerant piping that becomes the condenser may be arranged before or after the outer box is bent. The ends of the refrigerant pipes 125A and 125B are positioned in the communication grooves 127A and 127B in the outer shell of the machine room after applying a sealing material for preventing leakage of the foam insulation material. On the other hand, the refrigerant pipe 125C serving as a return pipe from the evaporator 126 is positioned in the communication groove 127C in the outer shell of the machine room so as not to contact the back plate 115C of the outer box, and is led out into the machine room. .

[0067] With respect to the joined body of the outer box 115 having the machine room 113 at the rear part of the top surface thus configured, a resin inner box formed by vacuum forming is separately provided at a predetermined interval. Then, the heat insulating box 102 is formed by filling and foaming with a foam heat insulating material such as urethane in the foaming process of the heat insulating material. After the heat insulation box 102 is completed, equipment and parts such as a compressor 122, a precool condenser 123, and a dryer 124 of the refrigeration cycle are accommodated in the machine room 113. Then, compressor 122 and precooling condenser 123, precooling condenser 123 and refrigerant pipe 125A, The medium pipe 125B and the dryer 124, the refrigerant pipe 125C and the compressor 122 are connected by welding, and each device is fixed to the outer shell 114 of the machine room. The order of fixing of each device and pipe welding can be changed as appropriate depending on the convenience of the manufacturing process and workability. Then, after fixing the blower 128 for forced ventilation to the outer shell 114 of the machine room, the machine room cover 138 is put on, and the connecting member 140 that serves as a handle for carrying the refrigerator is attached, and the structure around the machine room 113 is completed. .

[0068] In the compressor upper arrangement type refrigerator configured as described above, the outer shell 114 of the machine room on which the compressor 122 is placed is formed of resin. Then, a notch 116 composed of a notch 116A on the top plate 115A and an notch 116B on the top of the back plate 115B is formed in a part corresponding to the machine chamber 113 of the outer box 115, and the machine chamber The outer shell 114 is joined. In other words, by cutting out the part corresponding to the machine room of the outer box 115 in advance, the difficulty of the plating process that does not require the outer box 115 to form a deformed and complicated shape of the part corresponding to the machine room is suppressed. There is no need to use an expensive deep drawing material or the like for the steel plate which is simplified and is a metal plate.

In other words, a deformed and complicated machine room portion that accommodates the compressor 122 can be formed separately from the steel plate of the outer box 115 in advance. Compared to means that have a high degree of difficulty, such as bending a steel plate for an outer box or drawing with a press, and the form accuracy tends to vary, this embodiment has the following features: ing. In the assembly process that forms the machine room 113, it is possible to improve workability and assembly accuracy through simplification, and to reduce the overall manufacturing cost including man-hours and yield, and to increase the compressor top-arranged type refrigerator. Can be provided reasonably in quality. In addition to the method of fitting into the notch 116 of the present embodiment, other means can be used to engage and fix the outer casing 114 of the resin-made machine room with the outer casing 115. is there. However, in any method, the effect of the present embodiment in which the outer shell 114 of the machine room is formed as a separate body molded with resin can be enjoyed. In addition, the resin molding of the outer shell 114 of the machine room is preferably integral molding as much as possible, but depending on the molding convenience, a combination of a plurality of molded products may be partially used. In addition, in the resin molding of the outer shell 114 of the machine room, the plate thickness, the grease material, etc. are selected, and a reinforcing structure such as rib molding is applied as appropriate, and the bonding structure with the outer box 115 is reliable and appropriate. By doing so, the rigidity can be increased to a certain level or more even in the case of resin molding. In front of machine room outline 114 By forming the cross section having the wall 114A, the bottom wall 114B, and the both side walls 114C in a substantially L-shape with grease, the structural strength of the outer shell 114 itself of the machine room formed with grease can be increased first. In addition, it is possible to provide a base configuration that suppresses vibration and noise transmission of the compressor 122 and the blower 128.

[0070] By forming flange surfaces 114D, 114E, and 114F on the end surfaces of the walls 114A, 114B, and 114C of the outer shell 114 of the machine room, the end surfaces of the walls of the outer shell 114 of the machine room are bent as they are. Thus, the rigidity and the transmission of the compressor 122 and the blower 128 in the joint structure with the outer box 115 can be suppressed.

[0071] Further, since a resin-molded member made of a different material from that of the outer casing 115 made of a steel plate is joined, vibration propagation from the mounted compressor 122 is attenuated, and vibration and resonance sound are generated. Propagation to the refrigerator body 1101 is suppressed. Further, for example, it is possible to prevent the generation of resonance noise of the internal components attached in the refrigerator compartment 103.

[0072] In the compressor top-arranged type refrigerator, the placement height of the machine room 113 is close to the height of the ears of the user or the like, so the noise and vibration generated by the compressor 122 and the like become annoying. Cheap. However, by combining the outer shell 114 of the machine room with a separate resin molding, the discomfort of the user or occupant can be wiped out even in the refrigerator with the compressor arranged on top.

[0073] Further, between the products having different external shapes of the refrigerator, if the machine room 113 is formed by processing the outer box 115, the machine room is formed in accordance with the external dimensions of each product in the manufacturing process. Outer box specifications are different, making it difficult to increase productivity. On the other hand, by adopting the configuration of the present embodiment in which the outer shell 114 of the machine room is separately integrally molded with resin and joined to the outer box 115 of the refrigerator body, the machine room portion can be shared among products with different refrigerator external shapes. It is also possible to improve productivity by standardizing and reducing the overall manufacturing cost.

[0074] Further, depending on the contrivance of the manufacturing process, parts such as the compressor 122 are preliminarily mounted and preliminarily assembled on the outer shell 114 of the resin-molded machine room. A method is also conceivable in which the assembled product is attached to the cutout portion 116 of the outer box and joined, and the refrigerant pipes 125A, 125B, 125C, etc. are connected. In this way, it is possible to improve productivity through further rationalization of the manufacturing process, and to incorporate standardization and standardization as pre-assembled products. The manufacturing cost can be further reduced.

A blower 128 that forcibly cools the compressor 122 housed in the machine room 113 is fixed to the outer wall 114 of the machine room formed of grease. Attaching a blower 128 having a motor or fan, which is a driving part like the compressor 122, to the outer wall 114 of the resin molding machine room attenuates the vibration propagation to the refrigerator body 101, and stores in the refrigerator 103, etc. Resonance of internal parts and generation of resonance noise can be avoided. In addition, since the blower 128 itself can be assembled in advance in the outer 114 of the machine room, the machine room 113 having the forced cooling function of the compressor 122 can be reasonably prepared separately in the manufacturing process and the like. The manufacturing process can be simplified.

[0076] The precooling condenser 123 is connected to the discharge pipe side of the compressor 122 and extends to the main condenser (not shown) disposed on the inner surface of the outer box 115 and the bottom surface of the refrigerator main body 1. It is a condensing pipe that becomes a part of the condenser. In this embodiment, the pipe is swung in a loop including the purpose of suppressing vibration transmission from the compressor 122, and heat dissipation of the high-temperature refrigerant gas discharged from the compressor 122 is promoted at this point. To do. By incorporating this precooling condenser 123 in the forced flow path of the blower 128, the precooling condenser 123 is forcibly cooled in addition to the forced cooling of the compressor 122, and a machine incorporating a forced cooling type high-pressure unit. The chamber assembly can be made compact and rational.

[0077] Further, even if there is no large space, it is possible to promote the release of a considerable amount of sensible heat in the precooling condenser 123 using the forced ventilation action of the blower 128. When the condenser piping following the precooling condenser 123 is disposed on the inner surface of the outer box 115 of the heat insulation box body, the temperature of these pipes can be effectively reduced. It is possible to reduce the discomfort caused by the touch of the user by lowering the surface temperature of the corresponding part.

In this embodiment, the precooling condenser 123 is used. However, if the installation space permits, a heat exchanger such as a fin-tube heat exchanger has high heat exchange efficiency, and the condenser is accommodated so that the main condenser can be used. Of course, forced cooling is also possible.

[0079] In addition, since the communication chamber 127A, 127B, 127C of each refrigerant pipe is formed in the outer shell 114 of the machine room, each refrigerant pipe 125A, 125B, 125C connected to the compressor 122 is connected to the precooling condenser 123. As a result, the position of the part that enters and exits the machine room 113 becomes clear. As a result, assembly Thus, workability and assembly accuracy are improved, and the configuration of the leak insulation of the foam heat insulating material 121 and the like can be performed reliably.

[0080] In the space in the width direction in the machine room 113, the blower 128 is arranged so as to partition the first section 129 in which the compressor 122 is disposed and the second section 130 in which the precooling condenser 123 is disposed. It is arranged upstream of the compressor 122 and downstream of the precooling condenser 123. As a result, both the compressor 122 and the precooling condenser 123 can enjoy the forced cooling effect while avoiding the high heat of the compressor 122 preventing the heat dissipation of the precooling condenser 123.

[0081] External air inlets 139C and 139D formed in the machine room cover 138 covering the upper and rear open surfaces of the machine room 113 are provided facing the second compartment 130, and are connected to the outside. Air exhaust ports 139A and 139B are provided facing the first section 129. Therefore, air from the outside is first introduced into the second compartment 130 by the operation of the blower 128 to cool the precooling condenser 123, and then introduced into the first compartment to cool the compressor 122. Exhaust to the outside and heat dissipation is promoted. Thereby, the width direction of the machine room can be effectively used as a convection passage for heat dissipation, and heat dissipation efficiency can be maximized.

[0082] The machine room cover 138 is engaged with the outer wall 114 of the machine room formed of grease to cover the opening surface of the machine room 113, and the mating partner is a machine room outline 114 made of resin. Therefore, it is possible to easily form an engagement structure that matches the machine chamber cover 138. In addition, while maintaining a certain level of heat dissipation, it is possible to avoid problems with the appearance and design, and adverse effects due to the intrusion of foreign matter such as dust, insects and moths into the machine room, and to prevent the transmission of noise to the outside. You can.

[0083] The blower 128 has the outer shell 131 made of resin, and the outer shell 131 made of resin is engaged with the outer shell 114 of the machine room formed of the resin, so that the first compartment 129 and the second compartment 130, and the outer casing 114 made of resin in the machine room and the outer casing 131 made of resin in the blower are engaged with each other at the intermediate portion in the width direction of the machine room 113. To form a beam. In this way, the rigidity in the width direction of the outer shell 114 of the machine room increases as a result, and vibration and noise transmission of the blower 128 itself and the compressor 122 can be suppressed.

[0084] Further, by arranging the compressor 122 and the precooling condenser 123 separately on the left and right with the blower 128 in the middle, the compressor 122 is unevenly distributed on one side of the center of the refrigerator body 101 in the width direction. Arrangement. Then, in the refrigerator having the double doors 108A and 108B in the refrigerator 103 at the top of the main body as in the present embodiment, the position where the compressor 122 is arranged is the joint of the double doors 108A and 108B. The position is such that it is within the projection plane as viewed from the front of one of the two doors 108A and 108B. The closer to the joint between the double doors 108A and 108B, the compressor 122 shakes due to the impact when the door is closed, causing the internal mechanism of the compressor 122 and the container of the compressor 122 to collide, resulting in abnormal noise. There are concerns that arise. However, according to the arrangement of the present embodiment, the compressor 122 can be arranged avoiding the position where the impact is strong, so that it is possible to prevent the user or the like from feeling unpleasant noise. Since the compressor 122 is mounted on a separately provided mounting plate 133 and is elastically supported, the assembled product is fixed together with the mounting plate 133 to the back surface of the bottom wall 114 B of the outer wall of the machine room. If the reinforcing plate 137 is fixed with screws or the like, it is possible to arrange the compressor 122 with high accuracy by suppressing subtle mounting variation of the compressor 122, and to suppress the factor of vibration expansion. In addition, since the legs of the compressor are supported and fixed on the mounting plate in advance, workability is good and reliable support can be achieved. In addition, the support base of the heavy compressor 122 is not dependent only on the outer shell 114 made of resin, but is backed up with a reinforcing plate 137 such as a relatively thick metal plate to increase the support strength and transmit vibration. Can be suppressed. Further, if the lower part of the reinforcing plate 137 is tightly joined with the foam heat insulating material 121, vibration transmission can be further attenuated.

[0085] Focusing on the difference between the height space necessary for accommodating the compressor 122 and the height space necessary for accommodating the precooling condenser 123, the height space of the second compartment 130 accommodating the precooling condenser 123 By suppressing this, a step 132 in the height direction is formed between the first section 129 and the second section 130. As a result, a rigidity-enhanced portion can be formed by the step portion 132 at the intermediate portion in the width direction of the machine room. Can be suppressed.

[0086] Further, the top plate 115A of the outer box is provided with a reinforcing structure 118 at the peripheral edge of the notch 116A, so that the strength of the flat plate end surface is increased, and waving is prevented to reduce the wrinkle molding machine. The bonding strength with the outer shell 114 of the chamber can be improved.

[0087] Both side walls 114C of the outer shell 114 of the resin-made machine room face both side plates 115C of the outer box. The flat part 117 is joined to the flange surface 114F in an overlapped manner, and is screwed to the substantially L-shaped reinforcing material 120 fixed to the back surface of the flat part 117, so that both sides of the machine room 113 are fixed. The strength of the outer box can be reinforced. In this way, vibration propagation from the machine room 113 to the outer box 115 can be suppressed.

[0088] A space 119 formed between both side plates 115C of the outer box and both side walls 114C of the outer wall of the machine room is filled with a foam insulation 121 such as urethane when filling and foaming the heat insulation box 102. As a result, the strength of the joint between the side plates 115C and the side walls 114C of the outer wall of the machine room can be increased, and the rigidity can be increased. As a result, the transmission of noise from both sides of the machine room 113 can be attenuated to reduce the influence of noise to the outside of the compressor 122 and the blower 128. The side walls vibrate due to the vibration of the compressor 122 and the blower 128. Resonance in the refrigerator compartment 103 can be suppressed.

[0089] Further, it is possible to provide strength as a base for mounting the machine room cover 138, the transport handle 140, and the like. In addition, because the reinforcing material 120 is provided, when attaching the machine room cover 138, the transport handle 140, etc., the screws are fixed firmly, and the load when the refrigerator transport handle 140 is provided. The handle 140 for receiving can be firmly attached to the base material. By increasing the attachment strength of the machine room cover 138, it is possible to suppress the generation of resonance noise due to the resonance of the machine room cover 138 due to vibrations of the compressor 122 and the blower 128. If the handle 140 is provided so as to connect the reinforcing members 120 provided on both sides, the handle 140 can be used as a connecting member in the width direction of the outer shell 14 of the machine room, thereby preventing deformation in the width direction of both sides of the machine room. By further increasing the rigidity of the machine room, it is possible to make the structure effective as a countermeasure against vibration and noise and as a reinforcement measure when transporting refrigerators.

[0090] (Embodiment 2)

Furthermore, Embodiment 2 of the present invention will be described with reference to FIGS. In the figure, a vacuum heat insulating material 201 is adhered to the inner surface of both side plates 115B of the outer box with an adhesive such as hot melt. The vacuum heat insulating material 201 is provided up to the upper part of the both side plates 115B, and is also extended and pasted into the space 129 between the side walls 114C of the outer shell of the machine room. In addition, a small vacuum heat insulating material 202 made of the same material as the vacuum heat insulating material 201 corresponding to the size of each wall 114A, 114B, 114C of the outer wall of the machine room is attached. Yes. The vacuum insulation material 122 is not necessarily provided on all surfaces of the outer wall 114A, 114B, 114C of the machine room. If you do.

[0091] The vacuum heat insulating material 201 uses a board material in which glass fibers are laminated in layers as a core material, and this is a multilayered resin film using a metal foil such as aluminum or a metal-deposited film as a gas barrier base. It is a high-performance heat insulating material that is covered with an outer cover material and the inside is evacuated. As the core material, powdery materials such as silica and pearlite, and urethane foam of continuous foam can be selected. In the present embodiment, the shape retention effect as a core material, which is an inorganic material, and the deterioration of the heat insulation over time due to gas generation is small, is excellent in workability such as flatness and thin sheet metal, and has high heat transfer resistance. Glass fiber, which is easy to achieve high performance, is selected as the core material.

[0092] Such a vacuum heat insulating material 201 is mainly used mainly for the purpose of enhancing the heat insulating performance, but is embedded in a foam heat insulating material 121 such as urethane and is made of a composite material of different types or different structures. By using a layer structure, the attenuation effect on noise transmission can be enhanced. In the case of the vacuum heat insulating material 201 using glass fiber as a core material, there is a further advantage that it has a large effect of attenuating transmission of noise and vibration because the glass fiber exists in a complex entangled WEB shape and the inside is a vacuum. This is also extremely effective in this respect.

[0093] By providing the vacuum heat insulating materials 201 and 202, it is possible to enhance the attenuation effect on noise transmission and to attenuate noise in a wider frequency range as compared with the case of sound insulation with a single material. The leakage of noise transmitted to the outside can be reduced, and transmission of noise into the cabinet can be suppressed. As a result, particularly in the refrigerator having the compressor 122 arranged on the upper part, it is possible to suppress the transmission of an unpleasant sound to the ears of a user or the like and reduce the noise.

[0094] When the vacuum heat insulating material 202 is attached to the back surface of the outer shell 114 of the machine room, the refrigerator 122, the pre-cooling condenser 123, and the like are stored in the machine room 113 containing the heat-generating equipment. Heat leakage into the inside can be effectively increased.

[0095] Since the vacuum heat insulating material 202 can be assembled in advance to the outer shell 114 of the machine room, the pasting part can be framed by resin molding and the pasting accuracy is high and the workability is also good. Also true In order not to disturb the fluidity of the foam heat insulating material 121 at the end of the outer cover material of the air heat insulating material 202, the process of weaving the end is easily performed in the framework of the resin molding of the pasting site. In this way, it is possible to improve the reliability as a heat insulating structure between the machine room 113 having the largest temperature difference and requiring a heat insulating effect and the inside of the refrigerator room 103 or the like.

[0096] Further, when glass fiber is selected as the core material, it is preferable that it is easy to stick to each wall of the outer shell 114 of the machine room because it has high flatness and excellent workability.

[Embodiment 3]

Further, Embodiment 3 will be described with reference to FIGS. As shown in the figure, in the outer box 301, the top plate 303 and the back plate 304 in which the corresponding portion of the machine room 113 is bent into a stepped shape to form a recess 302 are joined to the two side plates 305 separately. And constitutes a housing.

[0098] By superimposing the outer shell 114 of the machine room formed of resin on the recess 302, the machine room equivalent part has a double structure of a steel plate and resin and the structural strength is increased. Furthermore, if consideration is given to the joint structure between the two via a flexible member or the like, it is possible to further suppress vibration and noise transmission of the compressor 122 and the blower 128.

[0099] In addition, since it is not a method of notching the machine chamber outer wall 114 by cutting out the corresponding part of the machine room, it is necessary to be concerned about the sealing structure of the foam insulation 121 at the joint at the periphery of the notch There is no.

[0100] Further, at least the both side plates 305 and the top plate 303 are joined by separated steel plates to form the outer box 301, and the degree of freedom in forming the outer box is expanded. For example, when a notch is provided in a corresponding part of the machine chamber 113 without using the double structure as described above, it is only necessary to adjust the length of the top plate 303 that does not require the notch formation.

Industrial applicability

[0101] As described above, the refrigerator according to the present invention reasonably provides a compressor top-arranged refrigerator with high quality. It has a high practical effect, such as suppressing the noise and vibration of the compressor and preventing the generation of resonance noise in the internal parts, thereby eliminating the unpleasant feelings of users and residents. As a result, it can be widely applied not only to household refrigerators, but also to machine room configurations for equipment in which a compressor is placed at the top of the main unit.

Claims

The scope of the claims

[1] A heat insulating box comprising an outer box, an inner box, and a heat insulating material provided between the outer box and the inner box;

A machine room formed by denting the rear side of the top surface of the heat insulation box inside, a compressor of a refrigeration cycle housed in the machine room,

A refrigerator having

A refrigerator in which the outer box is formed of a metal plate and the outer shell of the machine room on which the compressor is placed is formed of grease.

[2] The refrigerator according to claim 1, wherein a blower for forcibly cooling the compressor is further accommodated in the machine room, and the blower is fixed to the outer shell of the machine room.

[3] The refrigerator according to claim 2, wherein a condenser connected to the compressor by refrigerant piping is further accommodated in the machine room, and the condenser is forcibly cooled by the blower.

[4] The blower is disposed between the compressor and the condenser, the machine room is divided into right and left by the blower, and the first compartment and the front that house the compressor with the blower interposed therebetween. 4. The refrigerator according to claim 3, wherein the refrigerator is partitioned into a second partition that accommodates the condenser.

[5] The blower has an outer shell made of resin, and the outer shell of the blower is engaged with the outer shell of the machine room to partition the first compartment and the second compartment. A refrigerator as described in item 4.

6. The refrigerator according to claim 4, wherein a step in the height direction is formed between the first compartment and the second compartment.

7. The refrigerator according to claim 1, wherein the outer shell of the machine room is formed of a resin having a L-shaped cross section having a front wall, a bottom wall, and both side walls.

8. The refrigerator according to claim 7, wherein a flange surface is provided on an end surface of each wall of the outer shell of the machine room.

[9] The refrigerator according to claim 7, wherein both side plates of the outer box and the both side walls of the outer casing of the machine room face each other and are joined to each other.

10. The refrigerator according to claim 9, wherein the both side plates of the outer box and the both side walls of the outer casing of the machine room face each other with a space therebetween, and a heat insulating material is provided in the space.

11. The refrigerator according to claim 10, wherein a foamed heat insulating material is filled and foamed between the outer box and the inner box, and the foamed heat insulating material is filled and foamed in the space.

12. The refrigerator according to claim 10, further comprising a reinforcing material in the space.

13. The refrigerator according to claim 12, further comprising a connecting member that connects the reinforcing members provided on both sides.

14. The refrigerator according to claim 13, wherein the connecting member is a handle having a strength that can withstand a load during conveyance of the refrigerator and a shape that is easy to grip.

[15] A vacuum heat insulating material is attached to both side plates of the outer box, and the vacuum heat insulating material extends into the space between the both side plates of the outer box and both side walls of the outer casing of the machine room. The refrigerator according to claim 10.

16. The refrigerator according to claim 1, wherein a notch portion is provided in a portion corresponding to the machine room of the outer box, and the outline of the machine room is engaged with the notch portion.

[17] The refrigerator according to claim 16, wherein the cutout portion of the outer box is formed on the top plate while leaving flat portions on both sides.

18. The refrigerator according to claim 17, wherein a reinforcing structure is applied to a top plate at a peripheral edge of the notch of the outer box.

19. The refrigerator according to claim 17, wherein flange surfaces of both side walls of the outer casing of the machine room are overlapped and joined to the flat portion of the outer box.

20. The refrigerator according to claim 1, wherein a concave portion is provided at a portion corresponding to the machine room of the outer box, and the outer shell of the machine room is overlapped with the concave portion.

21. The refrigerator according to claim 1, wherein the outer box is formed by bending at least both side plates and a top plate integrally with a metal plate.

[22] The refrigerator according to claim 1, wherein the outer box is formed by joining at least both side plates and a top plate with separated metal plates.

23. The refrigerator according to claim 1, further comprising a reinforcing plate on a back surface of a bottom wall of the outer wall of the machine room on which the compressor is placed, and the compressor is supported and fixed on the reinforcing plate.

24. The refrigerator according to claim 23, further comprising: a mounting plate on which the compressor is mounted, wherein the compressor is supported and fixed on the reinforcing plate via the mounting plate.

25. The machine room according to claim 1, further comprising a machine room cover provided with an air circulation port between the machine room and the outside, wherein the machine room cover is engaged with the outline of the machine room to cover the open surface of the machine room. Refrigerated.

26. The refrigerator according to claim 25, wherein the circulation port of the machine room cover includes an exhaust port provided in the first section and an intake port provided in the second section.

27. The refrigerator according to claim 25, wherein the machine room cover is fixed to a reinforcing material.

28. The refrigerator according to claim 1, wherein a communication groove of a refrigerant pipe is formed in the outer wall of the machine room.

[29] The refrigerator according to claim 1, wherein a vacuum heat insulating material is attached to a back surface of the outer shell of the machine room.