JP2012255638A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator capable of improving the heat dissipation efficiency of a condenser installed in a machine room to attain power saving.SOLUTION: A refrigerator includes: a machine room 19 provided at the back-face lower part of a cabinet; a front wall 63 of the machine room separating the machine room 19 and a refrigerant room back and forth; a duct 100 provided in the machine room 19 along the front wall 63 of the machine room to suction air from a lower part of the machine room 19; a condenser provided in the duct 100; and a radiation fan 68 provided at the back of the duct 100 in the machine room 19. The condenser includes a refrigerant tube 56a in which a refrigerant flows and a radiation fin 56b provided with the refrigerant tube 56a. With the condenser, the radiation fin 56b is intimately provided at an overcrowded part 56-1 disposed in the downstream side of a coarse part 56-2 disposed at the upstream side of the duct 100. The radiation fan 68 opposes the overcrowded part 56-1 via an opening 106a formed at the duct 100.

Description

  Embodiments of the present invention relate to a refrigerator.

  In refrigerators, a compressor and a condenser that form part of the refrigeration cycle, as well as a heat dissipating fan that cools the compressor and condenser are installed in the machine room formed at the bottom of the back of the cabinet. Power saving is achieved (for example, the following patent document 1).

  However, due to the recent increase in environmental awareness, there is a strong demand for further power saving, and further improvement in the heat dissipation efficiency of the condenser is desired.

JP 2009-79778 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigerator capable of improving power dissipation efficiency of a condenser disposed in a machine room to save power.

  The refrigerator of this embodiment is provided in the machine room along the machine room provided at the lower back of the cabinet, the machine room front wall that divides the machine room and the refrigerator into the front and rear, and the machine room front wall. A duct for sucking air from below the machine room; a condenser provided in the duct; and a fan provided behind the duct in the machine room, wherein the condenser is a refrigerant tube through which a refrigerant flows. And the heat dissipating fins provided on the refrigerant tube, the heat dissipating fins being densely provided in a dense portion disposed on the downstream side of the duct from a sparse portion disposed on the upstream side of the duct, Is provided with an opening part behind the dense part in the condenser, and the fan is opposed to the dense part through the opening part.

It is sectional drawing of the refrigerator which concerns on one Example of this invention. It is a figure which shows the refrigerating cycle of the refrigerator of FIG. It is a disassembled perspective view of the fan unit, duct, and condenser of the refrigerator of FIG. It is an expanded sectional view of the machine room of the refrigerator of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the refrigerator 10 according to the present embodiment includes a cabinet 16 provided with a heat insulating space 13 between an outer box 12 made of a steel plate and an inner box 14 forming a storage space.

  The storage space formed inside the inner box 14 is partitioned into an upper refrigeration space 20 and a lower refrigeration space 40 by a heat insulating partition wall 17.

  The refrigerated space 20 is a space that is cooled to a refrigeration temperature (for example, 2 to 3 ° C.), and the interior is further divided vertically by a partition wall 21, and a plurality of mounting shelves are provided above the partition wall 21. A refrigerator compartment 22 is provided, and a vegetable compartment 24 in which a drawer-type storage container 26 is arranged below the partition wall 21 is provided.

  A freezing space 40 disposed below the vegetable compartment 24 via the heat insulating partition wall 17 is a space cooled to a freezing temperature (for example, −18 ° C. or lower), and is small in size with an ice making room 42 equipped with an automatic ice making machine. Freezer compartments (not shown) are provided on the left and right, and a freezer compartment 46 is provided below them.

  A refrigeration cooler 52 that cools the air in the refrigeration space 20 and a refrigeration blower fan 53 that blows the cold air cooled by the refrigeration cooler 52 to the refrigeration chamber 22 and the vegetable compartment 24 are provided at the rear of the refrigeration space 20. Is provided. Further, at the rear part of the freezing space 40, a freezing cooler 54 that cools the air in the freezing space 40, and the cold air cooled by the freezing cooler 54 is sent to the ice making chamber 42, the small freezing chamber, and the freezing chamber 46. A refrigeration blower fan 55 is provided.

  The refrigeration cooler 52 and the refrigeration cooler 54 constitute a refrigeration cycle 50 together with a compressor 51 and a condenser 56 housed in a machine room 19 provided at the lower back of the cabinet 16.

  As shown in FIG. 2, the refrigeration cycle 50 includes a compressor 51 that discharges a high-temperature and high-pressure gaseous refrigerant, a condenser 56 that receives the gaseous refrigerant discharged from the compressor 51 and liquefies heat, and a condenser A switching valve 57 provided on the outlet side of the cooler 56 for switching the refrigerant flow path, a refrigerating cooler 52 and a refrigerating cooler 54, and a refrigerating decompression device 58 as a throttling means for the coolers 52 and 54. The refrigerating cooler 52 and the refrigerating cooler 54 are circulated by circulating the refrigerant discharged from the compressor 51 by connecting them with a refrigerant pipe. Cool down.

  In the refrigerator 10 having the above configuration, as shown in FIG. 1, the machine room 19 includes an upper surface that divides the ceiling surface 61, the comp stand 62 that forms the bottom surface of the machine room 19, the back surface of the freezer room 46, and the machine room 19. The machine room front wall 63 inclined rearward, left and right side walls, and a back plate 66 detachably attached to the cabinet 16 are partitioned at the lower back of the cabinet 16. The ceiling surface 61 and the machine room front wall 63 are integrally formed by a bottom plate 67 of the cabinet 16.

  On one side in the width direction of the machine room 19 (for example, the left side when viewed from the back of the machine room 22), the compressor 51 is mounted on the comp table 62 via a vibration isolating rubber. A fan unit 70 is disposed on the other side in the width direction of the machine room 19 (for example, on the right side from the back of the machine room 22). A heat radiating fan 68 for cooling the compressor 51 and the condenser 56 is attached to the fan unit 70. Further, an evaporating dish 72 for evaporating the defrosted water generated from the refrigeration cooler 52 and the freezing cooler 54 is placed on the comp stand 62 behind the fan unit 70.

  As shown in FIG. 3, the condenser 56 is a fin tube capacitor including an aluminum refrigerant tube 56 a through which the refrigerant flows and plate-like heat radiation fins 56 b provided on the refrigerant tube 56 a.

  In this condenser 56, a plurality of plate-like heat radiation fins 56b are attached in parallel to each other on a refrigerant tube 56a disposed from the upper part to the lower part of the machine room 19 while meandering left and right, and the overall shape thereof is a substantially rectangular parallelepiped. The refrigerant discharged from the compressor 51 flows in from the upper part of the condenser 56 and flows to the lower part of the condenser 56 while meandering left and right.

  Of the refrigerant tubes 56a, the refrigerant tubes 56a located on the upstream side in the refrigerant flow direction have narrower intervals between adjacent radiating fins 56b than the refrigerant tubes 56a located on the downstream side in the refrigerant flow direction, and the radiating fins 56b are densely arranged. Is provided. In other words, the condenser 56 is formed with a dense portion 56-1 in which the radiating fins 56b are densely provided on the upper portion of the condenser 56 corresponding to the upstream side in the refrigerant flow direction, and the condenser 56 corresponding to the downstream side in the refrigerant flow direction. A lower portion 56-2 is formed in which a space between adjacent heat dissipating fins 56b is wider than that of the dense portion 56-1 and heat dissipating fins 56b are provided sparsely.

  Moreover, the refrigerant | coolant tube 56-3 in which the radiation fin 56b is not provided is connected to the refrigerant | coolant flow direction upstream of the refrigerant | coolant tube 56a which the dense part 56-1 has. The refrigerant tube 56-3 absorbs vibration from the compressor 51 propagating through the refrigerant pipe connecting the compressor 51 and the condenser 56, and the dense portion 56-1 and the sparse portion 56- of the condenser 56 are absorbed. 2 to prevent the vibration from propagating.

  As shown in FIGS. 3 and 4, the condenser 56 is provided in a duct 100 disposed in the machine room 19 along the machine room front wall 63. The duct 100 includes a duct main body 102 and a plate-shaped duct front surface portion 104.

  In the duct main body 102, a duct rear surface portion 106 that partitions the rear surface of the duct 100 and a duct side surface portion 108 that partitions the left and right side portions of the duct 100 are integrally formed. It has a shape.

  A locking claw 120 provided at the lower end of the duct main body 102 engages with a fixing hole (not shown) drilled in the comp base 62 and the duct main body 102 is fixed to the comp base 62 by screwing. . Thus, the duct main body 102 fixed to the comp table 62 communicates with the air inlet 138 formed in the lower surface of the duct main body 102 (see FIG. 4).

  The duct front surface portion 104 is a member that partitions the front surface of the duct 100 by closing the front opening of the duct main body 102 behind the machine room front wall 63. The duct front surface portion 104 is disposed so as to be inclined rearward along the machine room front wall 63 so that the upper end portion of the duct front surface portion 104 covers the upper portion of the condenser 56 provided in the duct 100. Curved backwards.

  As shown in FIG. 3, a boss portion 114 and a tube fixing portion 116 that protrude rearward are provided on the rear surface of the duct front surface portion 104 (the surface facing the duct rear surface portion 106). The screw 115 is screwed into the boss 114 in a state where the refrigerant tube 56 a of the condenser 56 is held by the tube fixing portion 116 and the condenser 56 is fixed to the duct front surface portion 104. Thereby, the duct front part 104 to which the condenser 56 is fixed is detachably attached to the duct main body 102.

  By attaching the duct front surface portion 104 to the duct main body 102 in this way, the projecting piece 160 protruding from the duct rear surface portion 106 of the duct main body 102 toward the duct front surface portion 104 abuts on the refrigerant tube 56a of the condenser 56, The condenser 56 is disposed in the duct 100 defined by the duct main body 102 and the duct front face 104 in a state where the heat radiating fins 56 b are spaced from each other so as not to contact the duct main body 102 and the duct front face 104.

  In addition, an opening 106 a that sinks downward is provided in the upper portion of the duct rear surface portion 106 provided in the duct main body 102, and the dense portion 56-1 provided in the upper portion of the condenser 56 is provided in the duct rear surface portion 106. The sparse part 56-2 exposed from the duct 100 by the opening part 106a provided in the lower part of the condenser 56 and covered with the duct rear face part 106, the duct side face part 108, and the duct front face part 104.

  The fan unit 70 is a member for fixing the heat radiating fan 68 to the duct main body 102 and the machine room 19, and includes a unit rear surface portion 124 in which a circular bell mouth 130 in which the heat radiating fan 68 is disposed is opened. A unit side surface 126 extending forward from the lower edge and the left and right edges of the unit rear surface 124.

  A concave portion 125 is formed in the upper portion of the unit rear surface portion 124 so as to be depressed toward the left and right sides, and the refrigerant discharged from the compressor 51 connected to the refrigerant tube 56-3 is supplied to the condenser 56. A refrigerant pipe and a refrigerant pipe for circulating the refrigerant that has flowed through the condenser 56 are disposed between the machine room 19 and the duct 100 through the recess 125.

  The heat dissipating fan 68 is formed by screwing a ring portion 134 formed at the outer end portion of the fixed arm 132 projecting radially outward from the motor to the unit rear surface portion 124, so that the suction port 68 a is formed inside the bell mouth 130. It is fixed to the fan unit 70 toward the front.

  The front end of the unit side surface 126 of the fan unit 70 is attached to the lower edge and the left and right edges of the opening 106 a provided in the duct rear surface 106 of the duct body 102. Thereby, the heat radiating fan 68 provided in the fan unit 70 is disposed behind the opening 106a and faces the dense portion 56-1 of the condenser 56 disposed in the duct 100 via the opening 106a. ing.

  As shown in FIG. 4, a substantially L-shaped fixing member 156 that extends rearward and protrudes upward is provided at the upper end of the unit rear surface portion 124 of the fan unit 70. The fixing unit 156 is screwed to the upper edge portion of the machine room 19 in a state where the upper end of the fan unit 70 is brought into contact with the surface 61 and the upper surface opening of the fan unit 70 is closed, so that the fan unit 70 is secured to the machine room 19. It is fixed to.

  In the refrigerator 10 having such a configuration, the compressor 51 is driven to start the operation of the refrigeration cycle 50 and the heat dissipating fan 68 is rotated so that the gaseous refrigerant discharged from the compressor 51 is discharged in the condenser 56. Cool with heat dissipation.

  Specifically, when the heat radiating fan 68 rotates, the air below the machine room 19 is taken into the duct 100 from the air inlet 138 formed in the compressor base 62 as shown in FIG. Of the heat radiating fan 68 through the opening 106a provided in the duct main body 102 through the duct front surface portion 104 while sequentially exchanging heat with the sparse portion 56-2 and the dense portion 56-1 of the condenser 56. It is sucked into the suction port 68a and discharged into the machine room 19 behind the heat dissipation fan 68.

  As described above, in the refrigerator 10 of the present embodiment, the condenser 56 provided in the duct 100 has a relatively large space between the radiation fins 56b at the lower part of the duct 100, that is, on the upstream side of the duct 100. A small sparse part 56-2 is arranged, and a dense part 56-1 in which heat radiation fins 56b are densely arranged is arranged in the upper part of the duct 100, that is, on the downstream side of the duct 100. Therefore, pressure loss in the vicinity of the air inlet 138 is suppressed, and air is easily taken into the duct 100 from the lower side of the machine room 19. The air density is increased in the sparse part 56-2 to increase the heat radiation efficiency, and the dense part 56- 1, the heat dissipation area can be increased to increase the heat dissipation efficiency, and the heat dissipation efficiency of the entire condenser 56 can be improved.

  In addition, the dense portion 56-1 in which the radiating fins 56b are densely arranged is opposed to the suction port 68a of the radiating fan 68 through the opening 106a provided in the duct rear surface portion 106. Since the suction airflow is not blocked by the duct body 102 and the air in the dense portion 56-1 can be directly sucked by the heat radiating fan 68, air resistance is reduced by providing the heat radiating fins 56b densely in the dense portion 56-1. Even if it increases, pressure loss can be suppressed and the heat dissipation efficiency of the condenser 56 can be improved.

  Further, in the present embodiment, the condenser 56 has a dense portion 56-1 formed on the upstream side in the refrigerant flow direction and a sparse portion 56-2 formed on the downstream side in the refrigerant flow direction, and is discharged from the compressor 51. The high-temperature refrigerant flows through the refrigerant tube 56a of the sparse part 56-2 after being cooled down after flowing through the refrigerant tube 56a of the dense part 56-1 having high heat dissipation performance provided with the heat radiation fins 56b densely. Therefore, the high-temperature refrigerant can be efficiently radiated at an early stage after being discharged from the compressor 51, and the heat dissipation efficiency of the condenser 56 can be improved.

  Furthermore, in the present embodiment, since the refrigerant tube 56-3 not provided with the radiation fins 56b is connected to the upstream side in the refrigerant flow direction of the refrigerant tube 56a of the dense portion 56-1, the compressor 51 The generated vibration is absorbed in the refrigerant tube 56-3 and is prevented from propagating to the dense part 56-1 and the sparse part 56-2 of the condenser 56 via the refrigerant pipe connecting the compressor 51 and the condenser 56. Therefore, it is possible to suppress the generation of noise and the wear of the radiating fins 56b due to the contact of the radiating fins 56b provided in the dense portion 56-1 and the sparse portion 56-2.

  The above-described embodiments are presented as examples, and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments are included in the scope and gist of the invention, and are also included in the invention described in the scope of claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 16 ... Cabinet 19 ... Machine room 20 ... Refrigeration space 40 ... Refrigeration space 50 ... Refrigeration cycle 51 ... Compressor 52 ... Refrigeration cooler 54 ... Refrigeration cooler 56 ... Condenser 56-1 ... Condensation part 56-2 ... Sparse Part 56a ... Refrigerant tube 56b ... Radiation fin 61 ... Ceiling surface 62 ... Comp stand 63 ... Machine room front wall 66 ... Back plate 68 ... Radiation fan 68a ... Suction port 70 ... Fan unit 72 ... Evaporating dish 100 ... Duct 102 ... Duct body DESCRIPTION OF SYMBOLS 104 ... Duct front surface part 106 ... Duct rear surface part 106a ... Opening part 108 ... Duct side surface part 124 ... Unit rear surface part 126 ... Unit side surface part 138 ... Air inlet

Claims (3)

A machine room in the lower back of the cabinet;
A machine room front wall that divides the machine room and the inside of the refrigerator back and forth,
A duct that is provided in the machine room along the front wall of the machine room and sucks air from below the machine room;
A condenser provided in the duct;
A fan provided behind the duct in the machine room,
The condenser includes a refrigerant tube through which a refrigerant flows and a heat dissipating fin provided in the refrigerant tube, and the condensing unit disposed on the downstream side of the duct from the sparse portion disposed on the upstream side of the duct. Radiation fins are densely installed,
The duct includes an opening portion behind the dense portion in the condenser,
The refrigerator, wherein the fan faces the dense portion through the opening.   The refrigerator according to claim 1, wherein the refrigerant tube provided in the dense portion is located on the upstream side in the refrigerant flow direction.   The refrigerator according to claim 1 or 2, wherein the condenser includes a refrigerant tube not provided with the radiation fins on the upstream side in the refrigerant flow direction of the refrigerant tube provided in the dense portion.

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