JP5872143B2 - refrigerator - Google Patents

Description

  Embodiments of the present invention relate to a refrigerator.

  2. Description of the Related Art Conventionally, there are refrigerators having two coolers, a refrigeration cooler and a refrigeration cooler, for cooling the refrigerator compartment and the freezer compartment independently. In such a refrigerator, the drainage hose for guiding the defrost water of the refrigeration cooler to the machine room is frozen and clogged when passing near the freezer compartment in the minus temperature zone, There was a risk that it would not drain well. For this reason, there exists what was constituted so that freezing of a drainage hose could be prevented by providing a drainage hose and a radiating pipe used as a plus temperature zone adjacent (for example, refer to patent documents 1).

JP 2007-78264 A

However, conventionally, even in a refrigerator that does not require a heat radiating pipe, it is necessary to provide a heat radiating pipe only to prevent the drainage hose from freezing. There is also a method for preventing freezing by providing a heater in the vicinity of the drainage hose instead of the heat radiating pipe, but this case is disadvantageous in terms of power consumption.
Therefore, a refrigerator capable of preventing the drainage hose from freezing with a simple configuration without using a heat radiating pipe or a heater is provided.

The refrigerator according to the present embodiment includes a refrigerator main body in which a freezing temperature zone storage chamber is disposed below a refrigeration temperature zone storage chamber, and is incorporated in the refrigerator main body, and is provided on a back wall portion of the storage chamber. A refrigeration cycle configured to include a refrigeration cooler that cools a storage room in a refrigeration temperature zone and a refrigeration cooler that cools a storage chamber in the refrigeration temperature zone, and the refrigeration cooler and the refrigeration cooler On the back side, a vacuum heat insulating material provided in the back wall of the refrigerator main body, and a refrigeration side provided on the wall of the refrigerator main body for guiding defrost water from the refrigeration cooler to a lower machine room A drainage hose, and a suction pipe constituting a part of the refrigeration cycle. Of the refrigeration side drain hose, a portion passing through the vicinity of the storage room of the refrigeration temperature zone is provided adjacent to the suction pipe that has become a plus temperature zone , the refrigeration side drain hose and the suction pipe are It is provided in the back wall and on the side of the vacuum heat insulating material.

1 is a longitudinal side view showing a schematic configuration of the entire refrigerator according to one embodiment. Front view of the entire refrigerator Configuration diagram of refrigeration cycle Front view of the refrigerator body The perspective view which shows a part of heat insulation member and refrigeration cycle seen from the back direction In FIG. 4, a cross-sectional plan view along the line AA The perspective view which expands and shows a positioning part In FIG. 4, a cross-sectional plan view along line BB

Hereinafter, an embodiment will be described with reference to the drawings.
As shown in FIG. 1, the refrigerator main body 1 is configured by providing a plurality of storage chambers in a heat insulating box 2 having a vertically long rectangular box shape whose front surface is open. Specifically, as shown in FIG. 2, a refrigerating room 3 and a vegetable room 4 are provided in the heat insulating box 2 in order from the upper stage, and an ice making room 5 and a small freezer room 6 (FIG. 2) are provided below. Are arranged side by side on the left and right, and the freezer compartment 7 is provided below them. As shown in FIG. 1, an automatic ice making device 8 is provided in the ice making chamber 5. Although the details will be described later, the heat insulating box 2 is configured to have a heat insulating material between a steel plate outer box 2a and a synthetic resin inner box 2b.

The refrigerator compartment 3 and the vegetable compartment 4 are both storage compartments in a refrigeration temperature zone (for example, a positive temperature zone of 1 to 4 ° C.), and the space between them is divided up and down by a plastic partition wall 9. . A hinged heat insulating door 3 a is provided on the front surface of the refrigerator compartment 3, and a drawer heat insulating door 4 a is provided on the front surface of the vegetable room 4. The lower case 10 which comprises a storage container is connected with the back surface part of this heat insulation door 4a. An upper case 11 smaller than the lower case 10 is provided on the upper portion of the lower case 10.
A chilled chamber 12 is provided on the right side at the lowermost part in the refrigerator compartment 3 (upper part of the partition wall 9). A chilled case 13 is provided in the chilled chamber 12 so that it can be taken in and out. In addition, an egg case and an accessory case are provided on the left side of the chilled chamber 12 (not shown). Furthermore, a water storage tank (not shown) for storing water to be supplied to the ice tray 8a of the automatic ice making device 8 is provided on the left side of the egg case and the accessory case.

  The ice making room 5, the small freezing room 6, and the freezing room 7 are all storage rooms in a freezing temperature zone (for example, a minus temperature zone of −10 to −20 ° C.). The space between the small freezer compartment 6 and the small freezer compartment 6 is partitioned by a heat insulating partition wall 14. As shown in FIG. 2, a drawer-type heat insulating door 5a is provided on the front surface of the ice making chamber 5, and an ice storage container 15 is connected to the back surface of the heat insulating door 5a. A drawer-type heat insulating door 6 a connected to a storage container is also provided on the front surface of the small freezer compartment 6. A drawer-type heat insulating door 7 a to which a lower storage container 7 b and an upper storage container 7 c are connected is also provided on the front surface of the freezer compartment 7.

  A refrigeration cycle 16 (see FIG. 3) for cooling each storage room is incorporated in the refrigerator body 1. Although details will be described later, the refrigeration cycle 16 includes a refrigeration cooler 17 for cooling a refrigerated temperature zone storage room (refrigerated room 3, vegetable room 4), and a refrigeration temperature zone storage room (ice making room 5, small size). The freezing room 6 and the freezing cooler 18 for cooling the freezing room 7) are comprised. As shown in FIG. 1, a machine room 19 is provided on the back side of the lower end of the refrigerator body 1. In the machine room 19, there are a compressor 20 and a condenser 21 (see FIG. 3) constituting the refrigeration cycle 16, a cooling fan (not shown) for cooling them, a defrost water evaporating dish 35 described later, and the like. It is arranged. As shown in FIG. 1, a control device 53 in which a microcomputer for controlling the whole is mounted is provided near the lower rear portion of the refrigerator main body 1.

  On the back wall of the refrigerator temperature zone storage room (refrigeration room 3, vegetable room 4) of the refrigerator body 1, the refrigeration cooler 17 and the cold air generated by the refrigeration cooler 17 are stored in the refrigeration room 3 (and A cold air supply duct 30 for supplying the vegetable room 4), a refrigeration blower fan 31 for circulating the cold air, and the like are arranged as follows. That is, a refrigerator room 32 for refrigeration is provided on the back wall portion of the refrigerator main body 1 so as to be located behind the chilled room 12 at the lowest stage of the refrigeration room 3. The refrigeration cooler 17 is disposed in the refrigeration cooler chamber 32. The front wall portion 32a (the rear wall portion of the chilled chamber 12) of the refrigeration cooler chamber 32 has a heat insulating property. Moreover, the upper end part of the refrigerator room 32 for refrigeration is connected with the lower end part of the cold air supply duct 30 provided so that the back wall part of the refrigerator compartment 3 might be extended upwards with a fixed width | variety. The cold air supply duct 30 is provided with a plurality of cold air supply ports 30 a that open in the refrigerator compartment 3.

  As shown in FIGS. 4 and 5, the lower part in the refrigeration cooler chamber 32 is located below the refrigeration cooler 17 and receives the defrost water from the refrigeration cooler 17. A water receiver 33 is provided. The refrigeration water receiver 33 is connected to a defrost water evaporating dish 35 (see FIG. 1) provided in the machine room 19 via a refrigeration drain hose 34. Thereby, the defrost water received by the refrigeration side water receiving part 33 is led to the defrost water evaporating dish 35 through the refrigeration side drain hose 34 and is evaporated in the defrost water evaporating dish 35. ing. In this case, the left and right length dimensions and the front and rear depth dimensions of the refrigeration side water receiver 33 are set larger than the left and right length dimensions and the front and rear depth dimensions of the refrigeration cooler 17, and the refrigeration cooler The size is configured to receive all the defrost water dripping from 17.

  A refrigeration blower fan 31 is disposed behind the vegetable compartment 4 below the refrigeration side water receiver 33, and a blower duct 36 and a suction port 37 are provided. The air duct 36 communicates with the refrigerating cooler chamber 32 so that the upper end of the air duct 36 bypasses the refrigerating side water receiving portion 33. The suction port 37 is open in the vegetable compartment 4. Although not particularly shown in the figure, communication ports are formed at the left and right corners of the rear part of the partition wall 9 that constitutes the bottom plate of the refrigerator compartment 3. This communication port makes the refrigerator compartment 3 and the vegetable compartment 4 below this communicate.

  In this configuration, when the refrigeration blower fan 31 is driven, the air in the vegetable compartment 4 is sucked into the refrigeration blower fan 31 side from the suction port 37 mainly as shown by the white arrow in FIG. The sucked air is blown out to the air duct 36 side. The air blown out to the air duct 36 side passes through the refrigeration cooler chamber 32 and the cold air supply duct 30 and is blown out into the refrigerating chamber 3 from the plurality of cold air supply ports 30a. A part of the air blown into the refrigerator compartment 3 is also supplied into the vegetable compartment 4 through the communication port, and finally circulated by being sucked into the refrigerator fan 31 for refrigerator. In this process, the air passing through the refrigeration cooler chamber 32 is cooled by the refrigeration cooler 17 to become cold air, and the cold air is supplied to the refrigeration chamber 3 and the vegetable chamber 4, whereby the refrigeration chamber 3 and the vegetable chamber. 4 is cooled to a temperature in the refrigeration temperature zone.

  A refrigeration cooler chamber 38 is provided on the back wall of the freezing temperature zone storage chamber (the ice making chamber 5, the small freezing chamber 6, and the freezing chamber 7) of the refrigerator main body 1. In the lower part of the freezing cooler chamber 38, a freezing cooler 18, a defrosting heater (not shown), and the like are disposed. In addition, a refrigeration blower fan 39 is disposed in the upper part of the refrigeration cooler chamber 38. A cold air outlet 38a is provided in the middle part of the front surface of the refrigeration cooler chamber 38, and a return port 38b is provided in the lower end part.

As shown in FIGS. 4 and 5, a refrigeration-side water receiving portion 40 is provided that is positioned below the refrigeration cooler 18 and receives defrost water when the refrigeration cooler 18 is defrosted. The refrigeration water receiver 40 is connected to a defrosted water evaporating dish 35 provided in the machine room 19 via a refrigeration drain hose 41. Thereby, the defrost water received by the freezing side water receiving part 40 is also led to the defrosting water evaporating dish 35 through the freezing side drain hose 41, and evaporates in the defrosting water evaporating dish 35. ing. Also in this case, the left and right length dimensions and the front and rear depth dimensions of the refrigeration-side water receiver 40 are set larger than the left and right length dimensions and the front and rear depth dimensions of the refrigeration cooler 18, and the refrigeration cooling It is configured to have a size that can receive all the defrosted water dripped from the vessel 18.
In this configuration, when the refrigeration blower fan 39 is driven, the cold air generated by the refrigeration cooler 18 is supplied into the ice making chamber 5, the small freezer compartment 6, and the freezer compartment 7 from the cold air outlet 38a. Thereafter, circulation is performed such that the return port 38b returns to the refrigeration cooler chamber 38. Thereby, the ice making room 5, the small freezer room 6, and the freezer room 7 are cooled.

  Next, the configuration of the refrigeration cycle 16 will be described in detail. As shown in FIG. 3, the refrigeration cycle 16 includes a compressor 20, a condenser 21, a dryer 22, a three-way valve 23, capillary tubes 24 and 25, and coolers 17 and 18 in the order of refrigerant flow. It is connected in a ring. A condenser 21 and a dryer 22 are sequentially connected to a high-pressure discharge port of the compressor 20 via a connection pipe 26. A three-way valve 23 is connected to the discharge side of the dryer 22. The three-way valve 23 has one inlet to which the dryer 22 is connected and two outlets. One of the two outlets of the three-way valve 23 is connected to the refrigeration side capillary tube 24 and the refrigeration cooler 17 in order. The refrigeration cooler 17 is connected to the compressor 20 via a refrigeration-side suction pipe 27 that is a connection pipe.

  The free side capillary tube 25 and the freezing cooler 18 are sequentially connected to the other of the two outlets of the three-way valve 23. The refrigeration cooler 18 is connected to the compressor 20 via a refrigeration-side suction pipe 28 that is a connecting pipe. A check valve 29 is provided between the refrigeration cooler 18 and the compressor 20 to prevent the refrigerant from the refrigeration cooler 17 from flowing back to the refrigeration cooler 18 side. Incidentally, in the present embodiment, the three-way valve 23 employs a PMV (Pulse Motor Valve), which is an electronic three-way valve that can change the degree of throttling as well as switching the refrigerant flow path. According to this, the refrigerant throttle adjustment control can be performed simultaneously with the switching control of the refrigerant flow path to the refrigeration cooler 17 and the refrigeration cooler 18.

  As shown in FIGS. 4 and 5, the refrigeration side suction pipe 27 is arranged around the back wall of the refrigerator body 1. That is, the refrigeration-side suction pipe 27 exits from the refrigeration cooler 17, extends to the left of the refrigeration cooler 17, and then bends upward. And after extending upwards, it makes a U-turn at the upper end of the back wall and extends straight downward. Then, after reaching the almost same height as the heat insulating partition wall 14 located between the refrigeration cooler 17 and the refrigeration cooler 18, it turns to the right. Then, in parallel with the height of the heat insulating partition wall 14, it extends to the right side of the refrigeration cooler 17, and then bends downward to extend into the machine room 19.

  The freezing side suction pipe 28 is also arranged in the back wall of the refrigerator main body 1 as shown in FIGS. That is, the freezing-side suction pipe 28 exits from the freezing cooler 18, extends to the left of the freezing cooler 18, and then bends upward. Then, after extending upward in parallel with the left side of the refrigeration side suction pipe 27, it makes a U-turn at a position below the upper end of the refrigeration side suction pipe 27 and extends downward. Then, after reaching almost the same height as the heat insulating partition wall 14, it turns to the right. The refrigeration side suction pipe 28 is arranged so as to extend to the right side of the refrigeration cooler 18 in parallel with the refrigeration side suction pipe 27 in the front-rear direction and then bend downward to extend into the machine room 19. Has been.

  Although not shown in detail, the refrigeration side capillary pipe 24 is brazed to the refrigeration side suction pipe 27 so that the refrigerant flows in opposite directions. Similarly, the refrigeration-side capillary tube 25 is brazed to the refrigeration-side suction pipe 28 so that the refrigerant flows in opposite directions. With this configuration, heat exchange is performed between the refrigeration side suction pipe 27 and the refrigeration side capillary tube 24 and between the refrigeration side suction pipe 28 and the refrigeration side capillary tube 25.

  As shown in FIGS. 4 and 5, the refrigeration drain hose 34 connected to the refrigeration side water receiving portion 33 extends obliquely to the lower right side, and then bends substantially vertically downward, so that the refrigeration side suction pipe 27 and the freezing side suction pipe 28 are arranged so as to extend in parallel. Similarly, the refrigeration-side drain hose 41 connected to the refrigeration-side water receiving portion 40 also extends obliquely to the lower right side and then bends substantially vertically downward, in parallel with the refrigeration-side suction pipe 27 and the refrigeration-side suction pipe 28. It is arranged so as to extend.

In this case, as shown in FIG. 5, most of the refrigeration side suction pipe 27 and the refrigeration side suction pipe 28 are supported by the heat insulating member 42 as a support portion and are disposed on the back wall portion of the heat insulating box 2. . This heat insulation member 42 is comprised from molded articles, such as a polystyrene foam and urethane foam which have heat insulation and electrical insulation, for example. The heat insulating member 42 has a crank shape as a whole, an upper end portion extending in the vertical direction on the left side of the back wall portion of the storage room (refrigeration room 3, vegetable room 4) in the refrigeration temperature zone, and the heat insulation partition wall 14 An intermediate portion extending left and right along the back wall portion and a lower end portion extending in the vertical direction on the right side of the back wall portion of the freezing temperature zone storage chamber (ice making chamber 5, small freezing chamber 6, freezing chamber 7) are integrated. Have. The suction pipes 27, 28, the drain hoses 34, 41, etc. are disposed in a buried state on the back side of the heat insulating member 42. At this time, the heat insulating member 42 is formed with a first housing groove 43, a second housing groove 44, and a third housing groove 45, each of which has a concave groove shape extending in the vertical direction (see FIG. 6). )
Incidentally, refrigeration-side electrical wiring connected to electrical components (for example, interior lighting not shown, refrigeration blower fan 31 and the like) disposed on the side of the storage room (refrigeration room 3, vegetable room 4) in the refrigeration temperature zone. Of the 46, the portion passing through the back side of the storage room (the ice making room 5, the small freezing room 6, the freezing room 7) in the freezing temperature zone is also supported by the heat insulating member 42. Further, it is connected to an electrical component (for example, an automatic ice making device 8 or a refrigeration blower fan 39) disposed on the side of a storage room (ice making room 5, small freezing room 6, freezing room 7) in a freezing temperature zone. Most of the freezing side electric wiring 47 is also supported by the heat insulating member 42.

  In this case, as shown in FIGS. 4 to 7, the refrigeration side suction pipe 28, the refrigeration side drain hose 34, the refrigeration side drain hose 41, the refrigeration side electric wiring 46, and the refrigeration side electric wiring 47 are parallel to each other. Has been placed. Specifically, as shown in FIG. 6, a first accommodation groove 43, a second accommodation groove 44, and a third accommodation groove 45 are formed at the lower end portion of the heat insulating member 42 in order from the right. Of these, the first receiving groove 43 has a wider groove width than the other receiving grooves (second receiving groove 44 and third receiving groove 45). The first housing groove 43 is a shallow groove portion 43a slightly deeper than the outer diameter of the refrigeration side electric wiring 46, and is located on the left side of the shallow groove portion 43a and is deeper than the shallow groove portion 43a, and the refrigeration side drain hose 34. It is comprised from the deep groove part 43b deeper than the outer diameter.

  As shown in FIG. 6, the refrigeration-side electrical wiring 46 is disposed in the shallow groove portion 43 a in the first accommodation groove 43. The deep groove 43b includes a refrigeration side drain hose 34, a refrigeration side suction pipe 27 and a refrigeration side capillary tube 24, and a refrigeration side suction pipe 28 and a refrigeration side capillary located on the left side of the refrigeration side drain hose 34. A tube 25 is provided. As described above, the refrigeration-side electrical wiring 46 is provided in the vicinity of the refrigeration-side drain hose 34 and the suction pipes 27 and 28. The refrigeration drain hose 34, the suction pipes 27 and 28, and the capillary tubes 24 and 25 do not need to be in contact with each other, and there may be a gap between them.

  The second accommodation groove 44 is formed to be spaced to the left of the first accommodation groove 43. The width of the second accommodation groove 44 is substantially the same as the outer diameter of the refrigeration side electric wiring 47, and the depth thereof is set to be slightly deeper than the outer diameter of the refrigeration side electric wiring 47. A refrigeration-side electrical wiring 47 is disposed in the second accommodation groove 44. In this case, between the refrigeration drain hose 34 disposed in the first housing groove 43 and the refrigeration-side electrical wiring 47 disposed in the second housing groove 44, the heat insulating member 42 (heat insulating material) is provided. ) Exists. For this reason, the refrigeration-side electrical wiring 47 is disposed away from the refrigeration-side drain hose 34 and is thermally insulated. In this case, the separation distance a between the refrigeration side drain hose 34 and the freezing side electrical wiring 47 is set larger than the separation distance b between the refrigeration side drain hose 34 and the capillary tubes 24 and 25.

  The third accommodation groove 45 is formed to be spaced to the left of the second accommodation groove 44 (and the first accommodation groove 43). The width of the third housing groove 45 is substantially the same as the outer diameter of the refrigeration side drain hose 41, and the depth is set to be slightly deeper than the outer diameter of the refrigeration side drain hose 41. A refrigeration-side drain hose 41 is disposed in the third accommodation groove 45. Also in this case, between the refrigeration side drain hose 34 disposed in the first housing groove 43 and the refrigeration side drain hose 41 disposed in the third housing groove 45, the heat insulating member 42 ( Insulation). For this reason, the refrigeration side drain hose 41 is spaced apart from the refrigeration side drain hose 34 and is thermally insulated.

  As shown in FIGS. 4 and 5, a positioning portion 48 is provided at the lower end of the heat insulating member 42. As shown in FIG. 7, the positioning portion 48 has a trapezoidal plate shape and a shape having a rising edge around the trapezoidal plate shape, and is made of a resin molded product such as plastic. The positioning portion 48 has an outer diameter of each element arranged on the heat insulating member 42, that is, the capillary tubes 24 and 25, the suction pipes 27 and 28, the drain hoses 34 and 41, and the electric wires 46 and 47. A plurality of holes having slightly larger diameters are provided, and the respective elements are inserted into these holes. Thereby, the positional relationship between the capillary tubes 24 and 25, the suction pipes 27 and 28, the drain hoses 34 and 41, and the electric wirings 46 and 47 is fixed.

  In this way, the portion of the refrigeration drain hose 34 that passes through the vicinity of the storage compartment (the ice making compartment 5, the small freezing compartment 6, and the freezing compartment 7) in the refrigeration temperature zone constitutes a part of the refrigeration cycle 16. The heat insulating member 42 is embedded adjacent to the pipes 27 and 28. Further, portions of the refrigeration-side electrical wiring 46 that pass through the vicinity of the freezing temperature zone storage room (the ice making room 5, the small freezing room 6, and the freezing room 7) are the refrigeration side drain hose 34 and the suction pipes 27 and 28. And embedded in the heat insulating member 42. The refrigeration side drain hose 34 is provided apart from the refrigeration side drain hose 41 and the refrigeration side electrical wiring 47 and is thermally insulated by the heat insulating member 42.

  As described above, the capillary tubes 24 and 25 and the suction pipes 27 and 28, the drain hoses 34 and 41, and the electric wirings 46 and 47 constituting a part of the refrigeration cycle 16 are arranged in the heat insulating member 42 and unitized. It is attached in the back wall part of the refrigerator main body 1, ie, the outer box 2a, and the inner box 2b. In this case, as shown in FIG. 8, between the outer box 2a and the inner box 2b of the heat insulation box 2, the vacuum heat insulating materials 49-52 are provided in the part in which the heat insulation member 42 does not exist.

  Specifically, as shown in FIG. 4, in the wall portion of the refrigerator body 1, the back side of the refrigerated temperature zone storage room (refrigerated room 3, vegetable room 4) is located on the right side of the heat insulating member 42. A vacuum heat insulating material 49 on the upper side of the back wall is provided on the back surface of the refrigeration cooler 17. Further, as shown in FIG. 8, on the back side of the freezing temperature zone storage room (ice-making room 5, small freezing room 6, freezing room 7), the freezing cooler 18 is located on the left side of the heat insulating member 42. A vacuum heat insulating material 50 on the lower side of the back wall is provided on the back surface of the back. Left and right vacuum heat insulating materials 51 and 52 are provided on the left and right side wall portions of the refrigerator body 1. In this case, the refrigeration cooler 17 is disposed in front of the vacuum heat insulating material 49 on the back wall upper side, and the refrigeration cooler 18 is disposed in front of the vacuum heat insulating material 50 on the lower back wall. ing.

Next, the effect | action of this embodiment is demonstrated along the flow of the refrigerant | coolant of the refrigerating cycle 16. FIG.
First, the refrigerant circulating in the refrigeration cycle 16 is compressed by the compressor 20 and becomes a high-temperature, high-pressure gaseous refrigerant. This gaseous refrigerant is dissipated by the condenser 21 and becomes a medium-temperature, high-pressure liquid refrigerant. After that, the liquid refrigerant from which impurities such as dirt and moisture are removed through the dryer 22 enters the refrigeration side capillary tube 24 (or the freezing side capillary tube 25) while being controlled by the three-way valve 23. At this time, the medium-temperature and high-pressure liquid refrigerant in the refrigeration side capillary tube 24 (or the refrigeration side capillary tube 25) is depressurized while heat exchange with the refrigerant in the refrigeration side suction pipe 27 (or the refrigeration side suction pipe 28). . The refrigerant evaporates while passing through the refrigeration cooler 17 (or the refrigeration cooler 18), and the inside of the refrigeration cooler chamber 32 (or the refrigeration cooler chamber 38) is cooled. Thereafter, the low-temperature, low-pressure gaseous refrigerant flows into the refrigeration side suction pipe 27 (or the refrigeration side suction pipe 28). At this time, the temperature of the refrigerant gas immediately after flowing into the refrigeration side suction pipe 27 (or the refrigeration side suction pipe 28) from the refrigeration cooler 17 (or the refrigeration cooler 18) is as low as around -10 ° C. However, this refrigerant gas exchanges heat with the refrigerant in the capillary tube 24 (or capillary tube 25) while passing through the suction pipe 27 (or suction pipe 28), and finally rises to about room temperature. Is done. Then, the refrigerant gas is again sucked into the compressor 20 to complete the circulation of the refrigerant.

According to this embodiment described above, the following operational effects can be obtained.
According to the configuration of the present embodiment, the portion of the refrigeration drain hose 34 that passes through the vicinity of the freezing temperature zone storage room (the ice making room 5, the small freezing room 6, the freezing room 7) is a part of the refrigeration cycle 16. Specifically, the first of the heat insulating member 42 is adjacent to the suction pipes 27 and 28 that are connection pipes connecting the refrigerator 20 with the refrigerator 17 or the refrigerator 20 with the refrigeration and the compressor 20. Is disposed in the receiving groove 43. The suction pipes 27 and 28 are arranged at positions where heat exchange is performed with the capillary tubes 24 and 25, and finally the temperature is raised to about room temperature, that is, a plus temperature range by heat exchange with the capillary tubes 24 and 25. Is done. According to this, the portion of the refrigeration drain hose 34 that passes through the vicinity of the freezing temperature zone storage room (the ice making room 5, the small freezing room 6, the freezing room 7) that is easily frozen is warmed by the suction pipes 27 and 28. It is done. For this reason, freezing of the refrigeration side drain hose 34 can be prevented, and clogging of the refrigeration side drain hose 34 can be prevented.

  In this configuration, it is not necessary to provide a heater that is not included in the components of the refrigeration cycle 16 in order to prevent the refrigeration drain hose 34 from freezing. For this reason, it is possible to prevent the refrigeration drain hose 34 from freezing with a simpler configuration, and there is no possibility of increasing power consumption by providing a heater.

  Further, in the refrigeration side electric wiring 46, a portion passing through the vicinity of the freezing temperature zone storage room (the ice making room 5, the small freezing room 6, the freezing room 7) is close to the refrigeration side drain hose 34 and the suction pipes 27 and 28. Thus, the first housing groove 43 of the heat insulating member 42 is disposed. According to this configuration, portions of the refrigeration-side electric wiring 46 that pass through the vicinity of the freezing temperature zone storage chamber (the ice making chamber 5, the small freezing chamber 6, and the freezing chamber 7) are heated by the suction pipes 27 and 28. For this reason, it is possible to prevent dew condensation that occurs around the refrigeration-side electrical wiring 46. Further, the first accommodation of the heat insulating member 42 by bringing the refrigeration side suction pipe 27, the refrigeration side suction pipe 28, the refrigeration side drain hose 34, and the refrigeration side electric wiring 46, which are elements in the plus temperature zone, close to each other. By providing the grooves 43 together, it is possible to prevent freezing and condensation of the refrigeration drain hose 34 and the refrigeration electrical wiring 46 and to save space.

  The refrigeration-side electrical wiring 47 is disposed in the second housing groove 44 provided in the heat insulating member 42 so as to be separated from the first housing groove 43. Thereby, the freezing side electric wiring 47 is separated from the refrigeration side drain hose 34 and the refrigeration side electric wiring 46 and is thermally insulated. According to this configuration, the refrigeration-side drain hose 34 and the refrigeration-side electrical wiring 46 are refrigerated-side electricity cooled to a minus temperature zone in a freezing temperature zone storage room (ice-making room 5, small freezing room 6, freezing room 7). It is possible to make the wiring 47 less susceptible to thermal influence. Thereby, freezing and dew condensation of the refrigeration side drain hose 34 and the refrigeration side electric wiring 46 can be prevented.

  Further, the refrigeration drain hose 41 is disposed in the third accommodation groove 45 provided in the heat insulating member 42 so as to be separated from the first accommodation groove 43 and the second accommodation groove 44. Thus, the refrigeration drain hose 41 is also separated from the refrigeration drain hose 34 and the refrigeration electrical wiring 46 and is thermally insulated. Therefore, the refrigeration side drain hose 34 and the refrigeration side electric wiring 46 are formed by the refrigeration side electric wiring 47 cooled in the minus temperature zone in the freezing temperature zone storage room (the ice making room 5, the small freezing room 6, and the freezing room 7). It can be made less susceptible to thermal effects. Thereby, freezing and dew condensation of the refrigeration side drain hose 34 and the refrigeration side electric wiring 46 can be prevented more effectively.

  Further, a positioning portion 48 is provided at the lower end of the heat insulating member 42, and the positional relationship between the capillary tubes 24 and 25, the suction pipes 27 and 28, the drain hoses 34 and 41, and the electric wirings 46 and 47 is fixed. ing. This prevents the positional relationship from being shifted due to vibration or the like. For this reason, for example, it is possible to prevent the suction pipes 27 and 28 and the refrigeration drain hose 34 from being separated by vibration after the refrigerator main body 1 is assembled. In this way, by fixing the positional relationship by the positioning portion 48, freezing and dew condensation of the refrigeration side drain hose 34 and the refrigeration side electric wiring 46 can be more effectively prevented.

  In the present embodiment, a vacuum heat insulating material 49 is provided on the back side of the refrigerator body 1, and vacuum heat insulating materials 51 and 52 are provided on the left and right side surfaces. By the way, the vacuum heat insulating materials 49 to 52 include, for example, a core material obtained by compressing and curing a laminated material of inorganic fibers such as glass wool, and a gas barrier performance obtained by performing aluminum vapor deposition on a synthetic resin film such as polyethylene. After being housed, the inside is evacuated and sealed under reduced pressure. Such a vacuum heat insulating material is generally superior in heat insulating performance as compared with a heat insulating material such as urethane foam. On the other hand, urethane foam has an advantage that it can easily cope with the shape because it is molded by injecting a liquid material into a mold (for example, inside the heat insulating box 2). On the other hand, the vacuum heat insulating material has a situation that it is difficult to flexibly cope with the shape because the core material is compression-hardened by pressing.

  Here, according to the structure of this embodiment, it is formed in the back wall part of the refrigerator main body 1 in the shape of a crank, and each element (capillary tubes 24 and 25, suction pipes 27 and 28, drainage hoses 34 and 41, A heat insulating member 42 is provided to support the electrical wiring 46, 47). And the vacuum heat insulating material 49 of the back wall upper side is provided in the back side of the cooler 17 for refrigeration located in the right side of the heat insulation member 42. As shown in FIG. A vacuum heat insulating material 50 below the back wall is provided on the back side of the refrigeration cooler 18 located on the left side of the heat insulating member 42. According to this configuration, the vacuum heat insulating material 49 on the upper side of the back wall and the vacuum heat insulating material 50 on the lower side of the back wall do not need to be provided with the receiving grooves of the respective elements, and can be formed into a simple plate shape. For this reason, even if it is a case where each said element is arrange | positioned in the back wall part of the refrigerator main body 1, a vacuum heat insulating material can be provided in the back wall part of this refrigerator main body 1. FIG. Thereby, high heat insulation performance can be obtained.

  In this embodiment, each of the above-described elements, that is, the capillary tubes 24 and 25, the suction pipes 27 and 28, the drainage hoses 34 and 41, and the electric wirings 46 and 47 are embedded in a unitized heat insulating member 42. It was set as the structure provided in the back wall part of the refrigerator main body 1. FIG. However, the present invention is not limited to this, and unitized heat insulating members may be provided on the left and right side walls. In this case, for example, elements (capillary tubes 24 and 25, suction pipes 27 and 28, refrigeration side drainage hose 34, refrigeration side electric wiring 46) that are in the plus temperature zone are provided on one side wall portion, and elements that are in the minus temperature zone. (The freezing side drain hose 41 and the freezing side electric wiring 47) may be provided on the other side wall. According to this configuration, a large separation distance between the element in the plus temperature zone and the element in the minus temperature zone can be ensured, so that a better thermal insulation state can be obtained between them. For this reason, freezing and dew condensation of the refrigeration side drain hose 34 and the refrigeration side electric wiring 46 can be prevented more reliably.

  As described above, according to the refrigerator of the present embodiment, the part passing through the vicinity of the storage room in the freezing temperature zone in the refrigeration side drainage hose that guides the defrosted water from the refrigeration cooler to the lower machine room, It is provided adjacent to the suction pipe in the plus temperature zone that constitutes a part of the refrigeration cycle. According to this structure, the part which passes the vicinity of the storage room of the said freezing temperature zone among the said refrigerator side drainage hoses is warmed by the said suction pipe. Thereby, it is possible to prevent the refrigeration drain hose from being frozen with a simple configuration without using a heat radiating pipe or a heater.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel 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 and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a refrigerator body, 3 is a refrigeration room (a storage room in a refrigeration temperature zone), 4 is a vegetable room (a storage room in a refrigeration temperature zone), 5 is an ice making room (a storage room in a freezing temperature zone), and 6 is a small Freezing room (freezing temperature zone storage room), 7 is freezing room (freezing temperature zone storage room), 16 is a refrigeration cycle, 17 is a refrigeration cooler, 18 is a freezing cooler, 19 is a machine room, and 27 is Refrigeration side suction pipe, 28 is a refrigeration side suction pipe, 34 is a refrigeration side drain hose, 41 is a refrigeration side drain hose, 42 is a heat insulating member (support), 46 is a refrigeration side electrical wiring, 47 is a refrigeration side electrical wiring, 48 Is a positioning part, 49-52 shows a vacuum heat insulating material.

Claims (6)

A refrigerator body in which a storage room for a freezing temperature zone is disposed below a storage room for a refrigerated temperature zone,
A refrigerating cooler for cooling the refrigerating temperature zone storage chamber, and a refrigerating cooler for cooling the refrigerating temperature zone storage chamber, which is incorporated in the refrigerator main body and provided on the back wall of the storage chamber. A configured refrigeration cycle; and
A vacuum heat insulating material provided in the back wall of the refrigerator main body on the back side of the refrigeration cooler and the refrigeration cooler;
Refrigeration side drainage hose provided on the wall of the refrigerator main body, guiding the defrost water from the refrigeration cooler to the lower machine room,
A suction pipe constituting a part of the refrigeration cycle,
Of the refrigeration drain hose, the portion passing through the vicinity of the storage room of the freezing temperature zone is provided adjacent to the suction pipe that has become a plus temperature zone ,
The refrigerator according to claim 1, wherein the refrigeration side drain hose and the suction pipe are provided in the back wall and on the side of the vacuum heat insulating material.   Of the refrigeration-side electrical wiring connected to the electrical components disposed on the storage room side in the refrigeration temperature zone, the portion passing through the vicinity of the storage room in the refrigeration temperature zone includes the refrigeration side drain hose and the suction pipe. The refrigerator according to claim 1, wherein the refrigerator is provided close to the refrigerator.   The refrigeration-side electrical wiring connected to the electrical components disposed on the storage room side in the refrigeration temperature zone is disposed apart from the refrigeration-side drainage hose. refrigerator. Provided on the wall of the refrigerator main body, comprising a refrigeration drain hose for guiding the defrost water of the refrigeration cooler to a lower machine room;
The refrigerator according to any one of claims 1 to 3, wherein the freezing side drainage hose is disposed apart from the refrigeration side drainage hose.   The refrigerator according to any one of claims 1 to 4, further comprising a positioning portion that fixes the refrigeration side drain hose and the suction pipe.   Of the wall portion of the refrigerator body, on the back side of the storage room in the freezing temperature zone, a support portion made of a heat insulating material that supports the drainage hose and the suction pipe is provided, and the support portion The refrigerator according to any one of claims 1 to 5, wherein a vacuum heat insulating material is disposed on the side.

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