JP2012233658A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator in which a compressor is loaded and whose noise and vibration are reduced.SOLUTION: The refrigerator includes a box body in which a storage chamber equipped with a door on its front side is arranged. A compressor houses an electric element consisting of a stator and a rotor and a compression element which is driven by the electric element, in a closed vessel containing an upper vessel and a lower vessel. In the compressor, a plurality of legs 106 fitted to the lower vessel are installed in the box body by way of an elastic member 200. The elastic member 200 is arranged at a plurality of cylindrical pins 108 provided of the surface of a compressor installation surface of the box body, with a torque control means for the electric element of the compressor being provided, to reduce noise and vibration of the refrigerator.

Description

  The present invention relates to a refrigerator that reduces vibration of a compressor.

  Conventional refrigerators generally have a machine room disposed at the lower rear of the refrigerator body, and house high-pressure components of a refrigeration cycle such as a compressor in the machine room. In recent years, refrigerators have become easier to use. In order to meet this demand, the top surface of the refrigerator main body, which is not easy to use in the storage room, is required to improve the storage performance from the viewpoint of good quality and space saving, and to improve the energy saving performance from the viewpoint of the global environment. In addition to improving the ease of use by installing it on the upper back of the refrigerator body, the heat dissipation is improved by configuring a machine room on the top surface where the temperature is likely to rise by a higher temperature compressor Thus, a method of realizing energy saving has been proposed (see, for example, Patent Document 1).

  FIG. 14 shows the configuration of the refrigerator described in Patent Document 1.

    The box body 1 of the refrigerator is composed of a refrigerator compartment 2, a vegetable compartment 3, and a freezer compartment 4 from the top. The refrigerator compartment 2 has a refrigerating compartment rotary door 5, and the vegetable compartment 3 has a vegetable compartment drawer door 6, a freezer compartment. The chamber 4 has a freezer compartment drawer door 7.

  The cooling unit 10 including the internal fan 8 and the evaporator 9 has a rear surface of the freezer compartment 4 that is substantially the same height as the opening of the freezer compartment 4 that forms a storage portion as the lowermost storage compartment. It installs in the rear part, and installs in the recessed part 12 dented in the refrigerator compartment 2 side over the top | upper surface 11a and the back surface 11b of the box main body 1 of the refrigerator box 1 which is not convenient to use.

  The refrigerator compartment 2 is provided with a plurality of shelves 12b for storing food and the like, and the box main body 1 extends between the uppermost storage space 12c and the second storage space 12d partitioned by the uppermost shelf 12b. The recessed part 12 provided in the back upper part of is traveling as a convex part 12e.

  In such a configuration, as the compressor 11 moves, the freezer compartment 4 and the vegetable compartment 3 are reduced in height by the storage volume of the compressor 11, so that the partition wall that partitions the refrigerator compartment 2 and the vegetable compartment 3 The position can be lowered downward, and the stored items in the vegetable room 3 can be easily taken out.

JP-A-11-183014

  However, in the above-described conventional configuration, the convex portion 12e formed at the upper corner portion of the refrigerator does not look good in design and the storage property is also lowered. Therefore, it is necessary to make the concave portion 12 low in order to make the convex portion 12e as small as possible. There is a problem of reducing the height of the compressor 11, which is the maximum factor that determines the height of the recess 12.

  Further, in order to reduce the height of the concave portion 12 in which the compressor 11 is installed as much as possible, a horizontal rotary compressor having a rotary compressor mechanism can be an effective means in terms of the type and form of the compressor 11.

  However, in general, a rotary compressor has a structure in which a machine part is directly fixed to an inner surface of a compressor shell, which is a container, in order to realize downsizing, and vibrations during operation are easily transmitted to the outside.

  For this reason, in the compressor upper arrangement type refrigerator in which vibration is likely to be transmitted to the refrigerator box main body 1, the position of the compressor 11 is closer to the user's ear than the conventional refrigerator of the compressor lower installation type. Therefore, there is a problem that the resonance sound due to the vibration of the compressor 11 and vibration transmission is likely to be uncomfortable, and the improvement of the usability and the appearance quality by the reduction of the compressor installation space and the reduction of vibration and noise are achieved. There was a problem that it was difficult.

  The present invention solves the above-described conventional problems, and achieves low noise and low vibration without sacrificing appearance design and cooling performance, achieving both storage efficiency and ease of use and energy saving. The purpose is to provide.

  In order to solve the above problems, the refrigerator of the present invention has a box body in which a storage room having a door on the front is arranged, and a stator and a rotor are placed in a sealed container having an upper container and a lower container. A compressor housing an electric element and a compression element driven by the electric element, wherein a plurality of legs fixed to the lower container are installed on the box body via an elastic member, and the box The elastic member is disposed on a plurality of substantially cylindrical pins provided on the surface of the main body on which the compressor is installed, and includes torque control means for the electric element of the compressor.

  This suppresses vibrations during steady operation of the compressor, so that the reliability durability of the compressor and the elastic members and pipes that are peripheral members of the compressor can be improved. A refrigerator can be provided.

  The refrigerator of the present invention is not only when the compressor is installed at the lower back of the refrigerator, but also when the compressor is installed on the top side of the refrigerator, the elastic member that is a peripheral member of the compressor and the compressor, Since the reliability durability of piping can be improved, a high-quality refrigerator with low noise and low vibration can be provided.

Schematic sectional view of the refrigerator in the first embodiment of the present invention. Schematic rear view of the refrigerator of the embodiment Schematic component development view of the refrigerator of the same embodiment Vertical sectional view of the compressor of the refrigerator of the same embodiment Horizontal sectional view of the refrigerator compressor of the embodiment The perspective view of the leg part of the compressor of the embodiment Circuit diagram of torque control means of the compressor of the same embodiment The figure which shows the algorithm of the duty correction | amendment at the time of torque control of the compressor of the embodiment Vibration characteristic diagram of the compressor of the same embodiment Vertical sectional view around the elastic member of the refrigerator of the same embodiment Vertical sectional view around the elastic member of the refrigerator of the same embodiment The longitudinal cross-sectional view around the elastic member of the refrigerator in Embodiment 2 of this invention The longitudinal cross-sectional view around the elastic member of the refrigerator in Embodiment 2 of this invention Schematic sectional view of a conventional refrigerator

  1st invention has the box main body by which the storage chamber provided with the door at the front was arrange | positioned, the electric element which consists of a stator and a rotor in the airtight container provided with the upper container and the lower container, and the said electric element A compressor housing a compression element driven by the plurality of legs, wherein a plurality of legs fixed to the lower container are installed on the box body via elastic members, and the compressor installation surface of the box body The elastic member is disposed on a plurality of substantially cylindrical pins provided on the surface, and has torque control means for the electric element of the compressor.

  This suppresses vibrations during steady operation of the compressor, so that the reliability durability of the compressor and the elastic members and pipes that are peripheral members of the compressor can be improved. A refrigerator can be provided.

  In a second aspect of the invention, the torque control means performs torque control in a low rotation range of 22 Hz or less.

  Thereby, in order to reduce the torque fluctuation of the compressor and suppress the vibration during steady operation, it is possible to improve the reliability durability of the compressor and the elastic members and pipes which are peripheral members of the compressor. A high-quality refrigerator with vibration can be provided.

  According to a third aspect of the present invention, there is a wall portion around the leg in the horizontal direction, and the leg and the wall portion are arranged via a buffer space in the horizontal direction.

  This suppresses vibrations other than steady vibrations caused by starting and stopping of the compressor and external vibrations, so that the reliability durability of the elastic members and pipes that are peripheral members of the compressor and the compressor can be improved. A high-quality refrigerator with low noise and low vibration can be provided.

According to a fourth aspect of the invention, the horizontal spatial distance between the leg and the wall portion is set to a value smaller than ½ of the difference between the inner diameter of the leg hole and the outer diameter of the pin.
This suppresses vibrations other than steady vibrations caused by starting and stopping of the compressor and external vibrations, so that the reliability durability of the elastic members and pipes that are peripheral members of the compressor and the compressor can be improved. A high-quality refrigerator with vibration can be provided.

5th invention has a wall part in the vertically upward direction of the said leg, and the said leg and the said wall part are arrange | positioned through a buffer space in the perpendicular direction.
This suppresses vibrations other than steady vibrations caused by starting and stopping of the compressor and external vibrations, so that the reliability durability of the elastic members and pipes that are peripheral members of the compressor and the compressor can be improved. A high-quality refrigerator with low noise and low vibration can be provided.

  6th invention comprises an elastic body in a part of said wall part.

  This suppresses vibrations other than steady vibrations caused by starting and stopping of the compressor and external vibrations, so that the reliability durability of the elastic members and pipes that are peripheral members of the compressor and the compressor can be improved. A high-quality refrigerator with low noise and low vibration can be provided.

  7th invention forms the recessed part dented over the top | upper surface and back surface of the said box main body, and the said compressor is installed in the said recessed part.

  As a result, even in the so-called top unit type refrigerator, in order to suppress vibrations other than steady vibrations caused by starting and stopping of the compressor and external vibrations, the reliability durability of the compressor and the peripheral members of the compressor and the piping is reliable. Therefore, a high-quality refrigerator with low noise and low vibration can be provided.

  Embodiments of a compressor according to the present invention will be described below with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a schematic sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a schematic rear view of the refrigerator according to the embodiment, and FIG. 3 is a schematic exploded view of components of the refrigerator according to the embodiment. 4 is a longitudinal sectional view of the compressor of the refrigerator in the embodiment, FIG. 5 is a horizontal sectional view of the compressor of the refrigerator in the embodiment, and FIG. 6 is a leg of the compressor of the refrigerator in the embodiment. It is a perspective view of a part. 7 is a circuit diagram of the torque control means of the compressor according to the embodiment, FIG. 8 is an algorithm for duty correction at the time of torque control of the compressor according to the embodiment, and FIG. 9 is a vibration of the compressor according to the embodiment. FIG. 10 and 11 are views around the elastic member of the refrigerator in the same embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, about the same structure as background art, the same code is attached and detailed description is abbreviate | omitted.

  1 to 3, a box body 1 includes a heat insulator 15 that foams and fills a space formed by an inner box 13 formed by vacuum forming a resin body such as ABS and an outer box 14 using a metal material such as a pre-coated steel plate. It is equipped with a heat insulating wall. As the heat insulator 15, for example, a hard urethane foam, a phenol foam, a styrene foam, or the like is used. As the foam material, it is better to use hydrocarbon-based cyclopentane from the viewpoint of preventing global warming.

  The box body 1 is divided into a plurality of heat insulating sections, and a door 15a is provided on the front surface. The door 15a is configured such that the upper part is a revolving door type and the lower part is a drawer type. The heat-insulated storage room 15b is a refrigerator room 2, a drawer-type switching room 16 and an ice making room 17, a drawer-type vegetable room 3, and a drawer-type freezer room 4 provided side by side. Each heat insulation section is provided with a door 15 a having heat insulation properties via a gasket 18. From the top are the refrigerating room rotary door 5, the switching room drawer door 19, the ice making room drawer door 20, the vegetable room drawer door 6, and the freezer compartment drawer door 7.

  The refrigerator compartment revolving door 5 is provided with a door pocket 21 as a storage space, and a plurality of storage shelves 22 are provided in the warehouse.

  Next, details of the box body 1 will be described. The outer box 14 of the box body 1 has a U-curved outer shell panel 24 cut out from the top surface 23, a bottom panel 25, a back panel 26, and a machine room panel 28 that forms a recess 27 to ensure sealing performance. And is constructed by assembling. The assembled box body 1 has a recess 27 formed in a portion extending over the top surface 23 and the back surface 28a. The concave portion 27 is convex on the uppermost storage space 29a defined by the uppermost shelf 29 and the inner box 13 and the second shelf storage space 30a defined by the second shelf 30 and the uppermost shelf 29. I am on a business trip as 30b. More preferably, the indoor side bottom wall surface 30c of the convex part 30b and the shelf bottom part 30d of the uppermost shelf 29 are substantially the same horizontal plane.

  In addition, the bottom panel 25 and the back panel 26 are provided with handles made of depressions that can be hooked with fingertips.

  Further, the inner box 13 is slightly smaller than the outer box 14, and the back portion of the inner box 13 is recessed inward, and a space in which the heat insulating body 15 is foam-filled by being incorporated in the outer box 14 is a box body. 1 is formed. Therefore, the left and right parts of the machine room panel 28 are also filled with the heat insulator 15 to form heat insulating walls, and the strength is also ensured.

  Next, the refrigeration cycle will be described. In the refrigeration cycle, the compressor 11 disposed on the installation surface 28 b of the recess 27, the discharge pipe 31 connected to the compressor 11, the top surface 23 and the side surface of the outer shell panel 24, the condensation provided on the recess 27 and the bottom panel 25. A vacuum chamber (not shown), a capillary 32 as a decompressor, a dryer (not shown) for removing moisture, an evaporator 9 having an internal fan 8 disposed in the vicinity of the back of the vegetable compartment 3 and the freezing compartment 4 The suction pipe 33 is connected in a ring shape.

  The recess 27 is provided with a top cover 34 fixed with screws or the like. The compressor 11 and the machine room fan 34a, the condenser (not shown), and the dryer (not shown) provided in the recess 27 are provided. A part of the discharge pipe 31 and the suction pipe 33 are accommodated. The upper portion of the top cover 34 is substantially flush with the top surface 23, and the top 34 b of the compressor 11 is located at a position lower than the top surface 23.

  The capillary 32 and the suction pipe 33 are copper pipes having substantially the same length, and are soldered so as to allow heat exchange with the end portion remaining. The capillary 32 is a small-diameter steel pipe having a large internal flow resistance for decompression. The inner diameter of the capillary 32 is about 0.6 mm to 1.0 mm, and the amount of decompression is designed by adjusting with the length.

  The suction pipe 33 uses a large-diameter copper pipe to reduce pressure loss, and its inner diameter is about 6 mm to 8 mm. Further, the capillary 32 and the suction pipe 33 are gathered compactly by meandering the back surface of the refrigerating chamber 2 in order to secure the length of the heat exchanger section 35, and between the inner box 13 and the back panel 26. It is embedded in a certain heat insulator 15. One end of the capillary 32 and the suction pipe 33 protrudes from the vicinity of the rear of the vegetable compartment 3 of the inner box 13 and is connected to the evaporator 9, and the other end is connected to the edge of the installation surface 28 b of the machine room panel 28. It protrudes upward from the provided cutout and is connected to a dryer (not shown), a condenser (not shown), and the compressor 11.

  In addition, the suction pipe 33 and the discharge pipe 31 are provided with a U-turn portion 36 in the vicinity of the connection portion with the compressor 11 for providing connection flexibility, and are accommodated in the recess 27. Furthermore, with the aim of improving assembly workability and serviceability, in order to reduce the density of piping and to make the piping connection portion visible from the rear, the piping connection portion faces the back side of the compressor 11. Thus, the compressor 11 is arranged on the left and right sides of the compressor 11.

  Next, details of the compressor 11 will be described.

  4 to 6, a mortar-shaped lower container 101 formed by deep drawing of a rolled steel plate having a thickness of 2 to 4 mm is engaged with an inverted mortar-shaped upper container 102, and the engagement portion is welded all around. The sealed container 103 is formed by joining, and the refrigerant 104 and the refrigerating machine oil 105 are stored inside the sealed container 103 at the bottom. A leg 106 is fixed to the lower side of the sealed container 103, and the elastic member 200 is loosely fitted to the pin 108 provided in the recess 27 of the refrigerator via the elastic member 200 locked to the leg 106. The position is fixed with.

  In addition, the leg 106 is elastically supported in the hermetic container 103 via a support portion 113a as a support member and a spring 114, and the vertical center of gravity A of the compressor 11, the leg 106 of the compressor, the elastic member 200, and the like. The distance B with the contact surface 106a is shorter than the distance C between the vertical center of gravity A of the compressor 11 and the lower end surface 113b of the support member.

  In the case where the center of gravity A in the height direction of the compressor is above the contact surface 106a between the leg 106 of the compressor and the elastic member 200 as in the present embodiment, the support member inside the compressor The contact surface 106a between the leg 106 of the compressor and the elastic member 200 is positioned above the lower end surface 113b of the compressor.

  Further, the height of the elastic member 200 is made larger than the distance F between the installation surface 28 b of the compressor 11 in the recess 27 and the lowest end E of the compressor 11.

  The leg 106 has a fixing surface 106b that is fixed to the sealed container 103, a bent portion 106c that rises upward, and an elastic member arrangement lower surface 106d that locks the elastic member. The fixing surface 106b, the bent portion 106c, and the elastic member arrangement lower surface Ribs 106e extending across at least two of 106d are provided.

  The electric element 110 includes a rotor 111 and a salient pole concentrated winding stator 112. The compression element 113 is constructed above the electric element 110 and is driven by the electric element 110.

  The electric element 110 and the compression element 113 are both housed in the hermetic container 103 and elastically supported on the bottom of the lower container 101 and the lower end of the stator 112 via a support part 113a as a support member and a spring 114.

  A support portion 113a and a spring 114 provided at the lower end of the stator 112 are support members that elastically support the mechanical portion.

  A terminal 115 constituting a part of the lower container 101 is for communicating electricity (not shown) inside and outside the sealed container 103, and supplies electricity to the electric element 110 through a lead wire 116. The sealed container 103 includes a discharge tube 120 for connection to the discharge pipe 31 of the refrigeration system, a suction tube 121 for connection to the U-turn portion 36, and a refrigerant 104 enclosed in the refrigeration system, and then the system is closed. A sealing tube 122 is provided.

  By the operation of the compression element 113, the refrigerant 104 passes through the U-turn portion 36 and the suction tube 121 and is sucked into the sealed container 103 and discharged from the discharge pipe 144 to the discharge tube 120.

  The discharge pipe 144 elastically connects the compression element 113 and the discharge tube 120 of the sealed container 103.

  Next, details of the compression element 113 will be described below.

  The shaft 130 has a main shaft portion 131 in which the rotor 111 is fixed by press-fitting or shrink fitting, and an eccentric portion 132 formed eccentrically with respect to the main shaft portion 131. The cylinder block 133 has a substantially cylindrical compression chamber 134 and a bearing portion 135 for supporting the main shaft portion 131 of the shaft 130, and is formed above the electric element 110.

  At this time, a rotor recess 111a is formed on the compression element side of the rotor 111, and a bearing portion 135 extends into the rotor recess 111a.

  The piston 136 is loosely fitted in the compression chamber 134 and connected to the eccentric portion 132 of the shaft 130 by the connecting means 137, and the rotational motion of the shaft 130 is converted into the reciprocating motion of the piston 136. The refrigerant 104 in the sealed container 103 is sucked from the suction port 141 of the suction muffler 140 by enlarging and reducing the pressure, and is formed in the cylinder block 133 via a valve (not shown) provided in the cylinder head 142. The discharged muffler 143, the discharge pipe 144, and the discharge tube 120 are discharged to the discharge pipe 31 outside the sealed container 103.

  The discharge pipe 144, which is a high-pressure pipe, is a steel pipe having an inner diameter of 1.5 mm to 3.0 mm, and is formed so as to be flexible by using L-shaped or U-shaped bending. The tube 120 is connected with elasticity.

About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
First, the temperature setting of each heat insulation section will be described. The refrigerator compartment 2 is usually set at 1 to 5 ° C. with the lower limit of the temperature at which it does not freeze for refrigerated storage. The switching chamber 16 can be changed in temperature setting according to user settings, and can be set to a desired temperature range from the freezer temperature range to the refrigeration and vegetable room temperature ranges. The ice making chamber 17 is an independent ice storage chamber and is set at a relatively high temperature of -18 to -10 ° C.

  The vegetable room 3 is often set to 2 to 7 ° C., which is a temperature setting equal to or slightly higher than that of the refrigerator room 2. The freezer compartment 4 is usually set at −22 to −18 ° C. for frozen storage, but may be set at a lower temperature, for example, −30, in order to improve the storage state.

  Each chamber is divided by a heat insulating wall in order to efficiently maintain different temperature settings. The heat insulating wall is formed by foaming and filling the heat insulating body 15 between the inner box 13 and the outer box 14. . The heat insulator 15 has sufficient heat insulating performance and ensures the strength of the box body 1.

  Next, the operation of the refrigeration cycle will be described. The cooling operation is started and stopped by signals from a temperature sensor (not shown) and a control board (not shown) in accordance with the set temperature in the cabinet. The compressor 11 discharges the high-temperature and high-pressure refrigerant 104 according to the instruction to start the cooling operation.

  The discharged refrigerant 104 passes through the discharge pipe 31 to dissipate heat in a condenser (not shown) to be condensed and liquefied, and is depressurized by the capillary 32 to become a low-temperature and low-pressure liquid refrigerant, reaches the evaporator 9, and reaches the evaporator 9. The refrigerant in the inside is evaporated and the low-temperature cold air subjected to heat exchange is distributed by a damper (not shown) to cool each chamber.

  Next, the operation of the compressor 11 will be described.

  When the compressor 11 is energized, electricity is supplied to the stator 112 of the electric element 110 through the terminal 115 and the lead wire 116, and the rotor 111 is rotated by the rotating magnetic field generated by the stator 112. Due to the rotation of the rotor 111, the eccentric portion 132 of the shaft 130 connected to the rotor performs a rotational motion that is eccentric from the axis of the shaft 130. The eccentric motion of the shaft 130 is converted into a reciprocating motion by the connecting means 137 connected to the eccentric portion 132 and becomes a reciprocating motion of the piston 136 connected to the other end of the connecting means 137, and the piston 136 is compressed into the compression chamber 134. The refrigerant 104 is sucked and compressed while changing the internal volume.

  The capacity of the piston 136 that is sucked and discharged during one reciprocation in the compression chamber 134 is referred to as a cylinder volume, and the ability to cool the cylinder volume changes.

  In the refrigerator that performs the operation as described above, the compressor 11 supported by the elastic member 200 and the legs 106 is mounted on the recess 27 formed across the top surface 23 and the back surface 28a of the refrigerator. The depth (height) of the recess is at least the minimum gap between the bottom of the lower container 101 of the compressor 11 and the installation surface 28b, the height of the compressor 11, and the minimum gap between the upper container 102 and the top cover 34, The thickness of the top cover 34 is necessary.

  In order to avoid contact between the compressor 11 and the installation surface 28b or the top surface cover 34, a minimum clearance is required, and the minimum thickness of the top surface cover 34 is determined from the strength surface. ) Is determined by the height of the compressor 11.

  On the other hand, the convex portion 30 b travels in the refrigerator compartment due to the concave portion 27. When the convex portion 30b is large, the storage property is deteriorated, and when the refrigerating chamber rotating door 5 is opened and the inside of the refrigerator compartment 2 is viewed, the appearance of the convex portion 30b is deteriorated. Therefore, a technique for reducing the height of the compressor 11 is required.

  The height of the compressor 11 will be specifically described. The compressor 11 uses steel plates of 2 to 4 mm for the lower container 101 and the upper container 102, and the total is about 7 mm. The lower container 101 and the upper container 102 each have a shape with a curvature in the vertical direction. This is because a specification with low noise is desired to make the living space where the refrigerator is installed comfortable. By giving the container a curvature, the rigidity and eigenvalue of the container are increased, and noise due to resonance is suppressed. The curvature is approximately R100 mm to R150 mm in radius, and in order to obtain this curvature, a little over 13 mm is required on one side.

  Next, refrigerating machine oil 105 is stored at the bottom of the sealed container 103. The refrigerating machine oil 105 is sealed in an amount of about 200 to 250 ml in order to guarantee the operation of the compressor 11 under various conditions, and occupies about 20 mm in height. Further, when the refrigerating machine oil 105 and the electric element 110 come into contact with each other, an abnormal increase in input occurs, so that a spatial distance of about 9 mm is necessary to prevent contact.

  In the refrigerator in which the compressor 11 is loaded on the top surface 23 of the refrigerator, since the compressor 11 approaches the position of the user's ear, it is more important to keep the noise of the compressor 11 small. Improvement is important, and securing the refrigerating machine oil 105 is also important from the viewpoint of improving reliability. For these reasons, the plate thickness is 7 mm, the curvature is 13 mm, the curvature and the oil are 20 mm, and 9 mm necessary for securing the clearance is required to be 49 mm. It is not appropriate in terms of characteristics to reduce this dimension.

  Therefore, the height of the compressor 11 is largely determined by the electric element 110 and the compression element 113. The compression element 113 can make the piston 136, the connecting means 137, the shaft 130, and the bearing portion 135 compact by reducing the cylinder volume. However, when the cylinder volume is reduced, the refrigerating capacity is reduced. In the present embodiment, in order to obtain a large capacity with a small cylinder volume, the compression element 113 is made compact by operating at a rotational speed higher than the commercial power supply frequency (50 Hz or 60 Hz in Japan). More specifically, since the cylinder volume can be reduced by about 30%, the diameter of the piston 136 can be reduced, and the load acting on the shaft 130 can be reduced. Therefore, the length of the bearing portion 135 that supports the shaft load is also reduced. Therefore, the electric element 110 can be configured close to the compression element 113. By making good use of the high rotation by the inverter, the inventor's design is able to make it 5 to 10 mm compact.

  The setting of the plurality of rotation speeds of the electric element 110 by the inverter method does not necessarily include a rotation speed corresponding to a frequency higher than the commercial power supply frequency (50 Hz or 60 Hz) in Japan.

  That is, a combination of settings that does not exceed the upper limit of a plurality of determined frequencies exceeding the commercial power supply frequency (not limited to Japan) is expected to save energy and reduce noise. There is also a combination that corresponds to the effect and does not dare to make the cylinder volume of the compression element 113 compact.

In addition, from the figure, the sealed container 103 includes an upper container 102 and a lower container 101, and a plurality of legs 106 fixed to the lower container 101 are installed in the recesses via the elastic member 200,
A plurality of pins 108 are provided on the installation surface 28 b of the recessed compressor, and the elastic member 200 is disposed on the pins 108, so that the height of the elastic member 200 can be reduced between the installation surface 28 b of the compressor and the compressor 11. The compressor 11 is mounted so as to be larger than the distance from the lower part.

  7, 8 and 9, the torque control means, operation and action of the electric element of the compressor will be described. FIG. 7 is a circuit diagram of torque control, and FIG. 8 shows an algorithm for duty correction during torque control. In FIG. 7, the compression process of the compressor is estimated by the position detection circuit of the electric element, duty correction is performed, and torque control of the electric element is performed. In FIG. 8, by changing the duty correction amount according to the load torque of the compression element in the compression step, the angular velocity of the rotor can be kept substantially constant, so that the vibration amount of the compressor can be attenuated.

  In recent years, in the inverter control of refrigerators from the viewpoint of energy saving, the importance of driving the compressor in a lower rotation range is increasing, and the use at 20 Hz or less, which has not been conventionally used, is also required.

  FIG. 9 shows the vibration characteristics of the compressor when the duty correction amount in the torque control by the inverter system is changed. From the characteristic of the duty correction amount 0% in FIG. 9A, it can be seen that the amplitude suddenly increases below 22 Hz. Therefore, by having the torque control means for performing torque control by duty correction, as shown in FIG. 9A, a remarkable effect of amplitude reduction is seen in a low rotation range of about 22 Hz or less. It can be seen that the higher the duty correction amount, the lower the amplitude of the compressor. For example, if the duty correction amount is 15% during 17 Hz operation as shown in FIG. 9 (C), the amplitude is changed from 300 μm to 200 μm by applying torque control as shown in FIG. 9 (B), and the amplitude is reduced by about 30%. Can be achieved. That is, by controlling the torque to reduce the pulsation of the compressor and reducing the amplitude, the amplitude of the leg can be reduced, so that vibration and noise can be reduced, and the contact portion between the elastic member and the leg is twisted or cracked. And has an effect of preventing cutting.

  In the present embodiment, it has been described that the torque control means performs torque control in a low rotation range of 22 Hz or less, but of course, torque control may be performed even at 22 Hz or more.

  In FIG. 10, a wall portion 201 is installed around the horizontal direction of the leg 106 attached to the upper portion of the elastic member 200 attached to the pin 108. The spatial distance 202 in the horizontal direction between the leg 106 and the wall 201 is a value smaller than ½ of the difference between the inner diameter 203 of the leg hole of the leg 106 and the outer diameter 204 of the pin, and the leg 106 contacts the wall 201. Even in this case, since there is a gap between the elastic member 200 and the pin 108, the elastic member 200 is not sandwiched between the leg 106 and the pin 108 and cut.

  In FIG. 11, an elastic body 205 is provided on the inner periphery of the wall 201. Even when the leg 106 abuts against the wall 201, the impact at the time of abutment is absorbed because the wall 201 is provided with the elastic body 205.

  The operation and action of the members around the legs 106 of the compressor 11 configured as described above will be described below.

  In the inverter type compressor 11, the swing of the leg 106 can be suppressed by the wall portion 201 in the vibration having a large amplitude generated in the transition period at the start and stop, so that the U-turn portion of the suction pipe 33 of the compressor 11 is suppressed. By reducing the stress of the pipe 36 and the discharge pipe 31, the pipe can be prevented from being deformed or broken.

Further, the leg 10 of the compressor 11 is not subjected to external vibration such as when the refrigerator is transported or when the door 15a is opened or closed.
6 can be suppressed to a small amount, so that the impact force from the leg 106 to the pin 108 is suppressed, so that the pin 108 is prevented from being broken. Further, the elastic member 200 has an effect of preventing the contact portion with the leg 106 from being twisted or cracked and cut. In addition, the U-turn portion 36 and the discharge pipe 31 of the suction pipe 33 of the compressor 11 have an effect of preventing deformation and breakage due to a stress reducing effect. Further, since the compressor 11 can be prevented from hitting the recessed portion 27 of the hermetically sealed container 103, the compressor 11 has an effect of preventing damage to a vacuum heat insulating material (not shown) housed in the heat insulating wall of the recessed portion 27. The reliability durability of the peripheral members of the machine 11 can be improved.

  Furthermore, in the manufacturing process of a refrigerator, since it has the effect of preventing misalignment of the legs 106, the elastic member 200, and the pins 108 when the compressor 11 is mounted, a high-quality refrigerator can be provided.

  In addition, since the elastic body 205 is provided on the inner peripheral portion of the wall portion 201, even when the leg 106 is in contact with the wall portion 201, the excitation force and noise generated because the impact at the time of contact is absorbed. Therefore, a high-quality refrigerator with excellent reliability can be provided.

(Embodiment 2)
12 and 13 are longitudinal sectional views around the elastic member 200 of the refrigerator in the same embodiment.

  In addition, about the same structure as FIG. 10, 11, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In addition, technical ideas, configurations, and effects common to the first embodiment will not be described one by one, but the same contents shall be included unless they are unreasonable when applied to the present embodiment. It is.

  In FIG. 12, a wall portion 201 is provided vertically above the leg 106 via a buffer space. In FIG. 13, an elastic body 205 is provided on the inner periphery of the wall 201. Even if the leg 106 moves in the vertical direction and comes into contact with the wall 201, the impact at the time of contact is absorbed because the wall 201 is provided with the elastic body 205.

  The operation and action of the pin 108 and the elastic member 200 configured as described above will be described below.

  Since the amount of vibration of the legs 106 of the compressor 11 can be suppressed small in external vibrations such as when the refrigerator is transported or when the door 15a is opened and closed, the pin 108 can be prevented from being bent to suppress the impact force from the legs 106 to the pins 108. Has an effect. Further, the elastic member 200 has an effect of preventing the contact portion with the leg 106 from being twisted or cracked and cut. In addition, the U-turn portion 36 and the discharge pipe 31 of the suction pipe 33 of the compressor 11 have an effect of preventing deformation and breakage due to a stress reducing effect. Further, since the compressor 11 can be prevented from hitting the recessed portion 27 of the hermetically sealed container 103, the compressor 11 has an effect of preventing damage to a vacuum heat insulating material (not shown) housed in the heat insulating wall of the recessed portion 27. The reliability durability of the peripheral members of the machine 11 can be improved.

  Further, since the elastic body 205 is provided on the inner peripheral vertical upper part of the wall part 201, even when the leg 106 moves vertically upward and comes into contact with the wall part 201, the impact at the time of contact is absorbed. Therefore, since the generated excitation force and noise are reduced, a high-quality refrigerator excellent in reliability can be provided.

  The wall portion 201 may be formed as a separate part, and the same effect can be obtained.

  This specification is also useful for a so-called bottom mount type refrigerator in which a compressor is mounted in a portion recessed over the bottom surface and the back surface of the box body, and the same effect can be obtained.

  As described above, since the refrigerator according to the present invention can be used effectively and conveniently in the cabinet and can reduce vibration and noise, the refrigerator can be applied to equipment using a cooling device such as a household or commercial refrigerator.

DESCRIPTION OF SYMBOLS 1 Box main body 11 Compressor 15a Door 15b Storage chamber 23 Top surface 27 Recessed part 28a Back surface 28b Installation surface 101 Lower container 102 Upper container 103 Sealed container 106 Leg 108 Pin 110 Electric element 111 Rotor 112 Stator 113 Compression element 200 Elastic member 201 Wall 202 Clearance distance 203 Inner diameter of leg hole 204 Outer diameter of pin

Claims (7)

An electric element composed of a stator and a rotor, and a compression element driven by the electric element, in a sealed container having an upper container and a lower container, having a box body in which a storage chamber with a door is provided on the front surface A plurality of legs fixed to the lower container are installed on the box body via elastic members, and a plurality of legs provided on the surface of the compressor installation surface of the box body The refrigerator which has the torque control means of the electric element of the compressor while arranging the elastic member on a substantially cylindrical pin. The refrigerator according to claim 1, wherein the torque control means performs torque control in a low rotation range of 22 Hz or less. The refrigerator according to claim 1 or 2, wherein a wall portion is provided around a horizontal direction of the leg, and the leg and the wall portion are disposed via a buffer space in the horizontal direction. The refrigerator according to claim 3, wherein a horizontal distance between the leg and the wall portion is a value smaller than ½ of a difference between an inner diameter of the leg hole and an outer diameter of the pin. The refrigerator according to any one of claims 1 to 4, further comprising a wall portion vertically above the leg, wherein the leg and the wall portion are disposed via a buffer space in the vertical direction. The refrigerator as described in any one of Claim 3 to 5 which comprises an elastic body in a part of said wall part. The refrigerator as described in any one of Claim 1 to 6 in which the recessed part dented over the top | upper surface and back surface of the said box main body is formed, and the said compressor is installed in the said recessed part.