JP5964708B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  In the refrigeration cycle of the refrigerator, the high-pressure and high-temperature refrigerant discharged from the compressor is radiated and depressurized through a condenser and a decompressor (capillary tube or the like) and sent to the evaporator. Refrigerant evaporates in the evaporator and cools the interior by removing heat from the surrounding air. Such conventional refrigerators are disclosed in Patent Documents 1 and 2.

  The conventional refrigerators described in Patent Documents 1 and 2 are provided with refrigerant pipes through which refrigerant flows in the refrigeration cycle. Refrigerant piping for the refrigeration cycle is laid across the side, back and top surfaces of the main body housing of the refrigerator. In this way, the heat dissipation and condensation action of the refrigerant guided to the evaporator is enhanced.

JP-A-10-332249 JP 2009-275964 A

  Here, in conventional refrigerators, mainly for optimization of material price, corrosion resistance, and heat transfer, multiple types of pipes with different materials such as iron (steel) pipes and copper pipes are used as refrigerant pipes for the refrigeration cycle. May be used. These plural types of pipes are connected by brazing processing or the like so that the inside communicates.

  When the pipes are heated and connected as in a brazing process or the like, for example, a copper pipe is annealed and softened at the brazing point due to the material. In particular, when joining with dissimilar metals having different pipe making methods such as steel pipes, there is a problem that load stress concentrates on the joint due to differences in thickness and hardness and breaks easily. On the other hand, in order to prevent breakage of the pipes that are heated and connected by performing a brazing process or the like, the connecting part of the pipes is embedded in a structure such as a wall part of the main body housing of the refrigerator. Prior art has been proposed. Thereby, the connection part of the pipe was fixed to the main body casing, and the breakage of the pipe was prevented.

  On the other hand, when connecting a plurality of types of pipes, it is necessary to perform a leak test at the pipe connecting portion in order to inspect whether or not the refrigerant circulating inside is leaked to the outside. However, if the connecting portion of the pipe is embedded in the wall of the main body housing of the refrigerator, there is a problem that it is not possible to confirm the presence or absence of leakage during a leak test. Furthermore, there has been a problem that it cannot be repaired when leakage of internal fluid can be confirmed at a connecting portion of a pipe embedded in a wall portion or the like of the main body housing.

  The present invention has been made in view of the above points, and provides a refrigerator capable of preventing breakage in a connecting portion of a refrigerant pipe of a refrigeration cycle and easily performing a leak test and repair of the connecting portion. The purpose is to do.

  In order to solve the above-described problems, the present invention provides a refrigerant pipe including a main body casing and a refrigeration cycle including a refrigerant pipe through which a refrigerant circulates inside the main body casing. Is formed by connecting a plurality of types of pipes of different materials at a connecting portion, and both sides of the connecting portion in the refrigerant flow direction are supported by the main body housing at a supporting portion, and the connecting portion The connecting portion is exposed so as to be visible without having a joint portion with other members other than the main body housing between the support portion and the support portion.

  According to this configuration, since the refrigerant pipe does not have a joint portion between the connecting portion and the support portion and other members other than the main body housing, the connecting portion may receive a mechanical load by the other members. Absent. Further, since the connecting portion is exposed so as to be visible, it is easy to find a leak from the connecting portion and repair the leaked portion.

  Moreover, the refrigerator of the said structure WHEREIN: The said main body housing | casing is equipped with the heat insulation member, The said refrigerant | coolant piping is embed | buried under the inside of the said heat insulation member in the said support part.

  According to this configuration, it is not necessary to use a member for supporting the refrigerant pipe on the main body housing, for example, an adhesive tape, a screw, an adhesive, or the like in the support portion. Therefore, with the configuration in which the cost is reduced, the generation of a mechanical load at the connecting portion of the refrigerant pipe is prevented, and the discovery of leakage from the connecting portion and the repair of the leaking portion are facilitated.

  In the refrigerator having the above-described configuration, the main body housing includes a machine room in which a compressor included in the refrigeration cycle is included as a component, and the connecting portion is exposed to the machine room so as to be visible. It is said.

  According to this configuration, the connecting portion of the refrigerant pipe is not subjected to a mechanical load by other members in the machine room. In addition, it is easy to find leaks from the connecting parts and repair leak points in the machine room.

  Moreover, the refrigerator of the said structure WHEREIN: The antirust coating was given to the surface of the said connection part, It is characterized by the above-mentioned.

  According to this configuration, for example, if there is a leak from the connecting portion during a leak test by internal pressurization of several MPa such as helium gas, the coating film is peeled off. Therefore, it is easy to find a leak.

  According to the configuration of the present invention, it is possible to provide a refrigerator that can prevent breakage in the connecting portion of the refrigerant pipe of the refrigeration cycle and can easily perform a leak test and repair of the connecting portion.

It is a vertical cross section side view of the refrigerator of embodiment of this invention. It is an external appearance perspective view of the machine room of the refrigerator of the embodiment of the present invention. It is a schematic perspective view of the refrigerating cycle of the refrigerator of embodiment of this invention. It is a block diagram which shows the structure of the refrigerator of embodiment of this invention. It is explanatory drawing which shows the wall part of the right side surface of the refrigerator of embodiment of this invention. It is the elements on larger scale of the wall part of the right side surface of the refrigerator of embodiment of this invention. It is the external appearance perspective view of the machine room at the time of a dryer part assembly paying attention to the wall part of the right side surface of the refrigerator of embodiment of this invention. It is the external appearance perspective view of the machine room at the time of housing a dryer part paying attention to the wall part of the right side of the refrigerator of the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  Initially, the structure and operation | movement are demonstrated about the refrigerator of embodiment of this invention using FIGS. 1-4. 1 is a vertical sectional side view of a refrigerator, FIG. 2 is an external perspective view of a machine room of the refrigerator, FIG. 3 is a schematic perspective view of a refrigeration cycle of the refrigerator, and FIG. 4 is a block diagram showing a configuration of the refrigerator. In addition, the left side in FIG. 1 is the front side of the refrigerator, and the right side is the back side of the refrigerator. In this description, the right side of the refrigerator viewed from the front side of the refrigerator is the right side of the refrigerator, and the left side is the left side of the refrigerator.

  The refrigerator 1 includes a main body housing 2 having a heat insulating structure as shown in FIG. The main body housing 2 includes a refrigerator room 3, an upper freezer room 4, a lower freezer room 5, and a vegetable room 6 in order from above as a storage room for food and the like. The refrigerator compartment 3 and the upper freezer compartment 4 are partitioned by a partition portion 7, and the upper freezer compartment 4 and the lower freezer compartment 5 are partitioned by a partition portion 8, and the lower freezer compartment 5 and the vegetable compartment 6 are separated from each other. The space is partitioned by the partition portion 9.

  The opening 3a on the front surface of the refrigerator compartment 3 is opened and closed by a rotating door 3b having a heat insulating structure. The opening 4a on the front surface of the upper freezer compartment 4 is opened and closed by a drawer-type door 4b having a heat insulating structure. The opening 5a on the front surface of the lower freezer compartment 5 is opened and closed by a drawer-type door 5b having a heat insulating structure. The opening 6a in the front of the vegetable compartment 6 is opened and closed by a drawer type door 6b having a heat insulating structure. A storage box (not shown) formed by resin molding is attached to the back side of the door 4b, door 5b, and door 6b.

  Sliding between the door 4b and the side wall inside the upper freezer compartment 4, between the door 5b and the side wall inside the lower freezer compartment 5, and between the door 6b and the side wall inside the vegetable compartment 6 extending in the front-rear direction. Each moving guide portion (not shown) is provided. Thereby, the door 4b and its storage case, the door 5b and its storage case, and the door 6b and its storage case can be smoothly slid back and forth integrally through the respective openings.

  A machine room 10 shown in FIGS. 1 and 2 is formed at the lower back of the main body housing 2. In the machine room 10, a compressor 21 and a dryer 26, which are components of the refrigeration cycle 20 shown in FIG. An evaporating dish 11 is disposed in the machine room 10.

  As shown in FIG. 3, the refrigeration cycle 20 includes a compressor 21, a condenser (condenser) 22, a dew condensation prevention pipe 24, a dryer 26, a decompressor 27, an evaporator (cooler) 28, and a suction pipe 29 as constituent elements. . Since the decompressor 27 and the suction pipe 29 are in contact with each other and exchange heat to increase efficiency, they appear to overlap in FIG. In addition, the arrow drawn close to the refrigerant | coolant piping etc. of FIG. 3 shows the distribution direction of a refrigerant | coolant.

  The compressor 21 is arrange | positioned in the machine room 10 as mentioned above, and compresses the refrigerant | coolant for cooling each store room of the refrigerator 1. As shown in FIG.

  The condenser (condenser) 22 is configured as a refrigerant pipe through which the refrigerant flows, and has a function of condensing the high-temperature refrigerant. The capacitor 22 is laid on the back surface, the right side surface, and the left side surface of the main body housing 2 where heat dissipation and condensation are likely to occur. The capacitor 22 becomes the back capacitor 22B on the back surface of the main body housing 2, and the side capacitors 22L and 22R on the left and right side surfaces.

  The dryer 26 removes moisture from the refrigerant in order to prevent the moisture contained in the refrigerant from freezing. The decompressor 27 is composed of, for example, a capillary tube composed of a capillary tube, and rapidly expands and depressurizes the refrigerant using a pressure difference.

  The evaporator (cooler) 28 is arranged in the refrigerator 1 as shown in FIG. The refrigerant sent from the decompressor 27 takes heat from the evaporator 28, and the evaporator 28 takes heat from the surrounding air, thereby cooling the interior. The evaporator 28 is connected to the compressor 21 via a suction pipe 29.

  A duct 14 that vertically penetrates the interior of the main body housing 2 is formed on the rear side of the interior of the main housing 2, that is, on the front side of the rear wall of the refrigerator compartment 3, the upper freezer compartment 4, and the lower freezer compartment 5. The The evaporator 28 is disposed in the duct 14. The duct 14 has a circulating air flow inlet and a circulating air outlet (both not shown). In addition, an internal fan 15 for generating a circulating airflow inside the duct 14 and the inside of the warehouse is disposed inside the duct 14.

  An evaporator temperature detector 16 is provided in the vicinity of the evaporator 28 in the cabinet (not shown in FIG. 1, see FIG. 4). The evaporator temperature detector 16 detects the temperature related to the elimination of frost formation on the evaporator 28. Below the evaporator 28, an evaporator heater 17 as a defrosting means is arranged. The evaporator heater 17 is composed of a glass tube heater or the like, and melts and removes frost adhering to the surface of the evaporator 28 by heat. Below the evaporator heater 17 and in the machine room 10 is provided an evaporating dish 11 for receiving defrosted water. The defrost water stored in the evaporating dish 11 is evaporated by receiving heat generated by the compressor 1 and the condenser 22.

  The refrigerator 1 accommodates the control unit 30 shown in FIG. 4 in the main body housing 2 in order to perform the overall operation control. The control unit 30 includes a calculation unit and a storage unit (not shown), and controls the compressor 21 and the internal fan 15 based on the program and data stored and input in the storage unit, and the internal temperature is preset. The refrigeration cycle 20 is operated so as to reach the target value. In this operation, the control unit 30 controls the evaporator heater 17 based on the operation time and temperature information regarding the frost formation of the evaporator 28 obtained from the evaporator temperature detection unit 16.

  When the compressor 21 and the internal fan 15 are driven and the refrigeration cycle 20 is operated, the air in the storage room is sucked into the duct 14 from the circulating air flow inlet in the internal space. The sucked air is cooled while passing around the evaporator 28 and becomes cold. The cold air is fed into the refrigerating room 3, the upper freezer room 4, the lower freezer room 5, and the vegetable room 6 which are storage rooms through a circulation airflow outlet. The air sent into the refrigerator compartment 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 is returned to the circulation airflow inlet through a return duct (not shown).

  When the defrost start time set in advance is reached during the operation of the refrigeration cycle 20, the refrigerator 1 starts the defrost operation for the evaporator 28 using the evaporator heater 17. And if the temperature of the evaporator 28 which the evaporator temperature detection part 16 detects reaches the preset defrost end temperature, the refrigerator 1 will complete | finish the defrost operation with respect to the evaporator 28. FIG.

  Next, the detailed configuration of the right side wall portion of the main body housing 2 of the refrigerator 1 will be described with reference to FIGS. 5 and 6 in addition to FIGS. 1 and 2. FIG. 5 is an explanatory view showing the right side wall portion of the refrigerator, and FIG. 6 is a partially enlarged view of the right side wall portion of the refrigerator. In addition, FIG. 5 is the figure which looked at the wall part of the right side surface of a refrigerator from the inside of a refrigerator. FIG. 6 is a view of a portion corresponding to the periphery of the machine room 10 on the right side wall of the refrigerator as viewed from the inside of the machine room 10. The right side in FIGS. 5 and 6 is the front side of the refrigerator, and the left side is the back side of the refrigerator.

  The main body housing 2 of the refrigerator 1 includes an outer plate 41 and a heat insulating member 42 as shown in FIG. The outer plate 41 has a rectangular flat plate shape extending from the upper end to the lower end in the vertical direction along the outer surface of the wall 2R and extending from the front end to the rear end in the front-rear direction. The heat insulating member 42 is made of a hard foamed urethane resin having a predetermined thickness, and is filled over substantially the entire inner surface of the outer plate 41. The heat insulating member 42 is not provided in a portion corresponding to the machine room 10 of the outer plate 41, that is, a lower left portion in FIGS. Moreover, hard foaming urethane has the intensity | strength which supports the main body of the refrigerator 1 although it is a heat insulation member.

  A side capacitor 22R is embedded in the heat insulating member 42 in the wall 2R. The side capacitor 22R of the wall 2R extends while meandering in the vertical direction from the front side (right side in FIG. 5) to the back side (left side in FIG. 5) of the refrigerator 1. The side capacitor 22 </ b> R reaches the portion corresponding to the machine room 10 at the end on the back side, and is exposed from the heat insulating member 42 toward the inside of the machine room 10.

  The side capacitor 22R is formed by connecting a plurality of types of pipes made of different materials. That is, the side capacitor 22R includes an iron pipe 43 that is an iron pipe and a copper pipe 44 that is a copper pipe. The iron pipe 43 occupies most of the front side of the side capacitor 22 </ b> R, and most of it is embedded in the heat insulating member 42. The copper tube 44 forms a part of the back side of the side capacitor 22 </ b> R, and most of the copper tube 44 is exposed toward the inside of the machine room 10.

  A connecting portion 45 is provided at an end portion on the back side of the iron tube 43 and one end of the copper tube 44, and the iron tube 43 and the copper tube 44 are connected by the connecting portion 45. The connecting portion 45 is connected by brazing or the like so that the inside of the refrigerant pipe communicates. The side capacitor 22R is previously connected to the iron tube 43 and the copper tube 44 before assembling to the refrigerator 1, thereby removing the residual flux after brazing, the primary leak test for each component, and rust prevention. Treatment becomes easy.

  The connecting portion 45 is exposed to the machine room 10 so as to be visible. That is, the connecting portion 45 can be seen from the inside of the machine room 10 and can be touched by hand. Rust-proof coating is applied to the surface of the connecting portion 45.

  The heat insulating member 42 made of hard foamed urethane or the like has a strong holding force with respect to what is embedded inside. On both sides of the connecting portion 45 in the refrigerant flow direction, support portions 46 and 47 are provided so that the iron pipe 43 and the copper pipe 44 are supported by the wall portion 2R by being embedded in the heat insulating member 42. That is, the iron pipe 43 is embedded in the heat insulating member 42 in the support portion 46 and supported by the wall portion 2R. The copper tube 44 is embedded in the heat insulating member 42 in the support portion 47 and supported by the wall portion 2R.

  A portion of the copper tube 44 opposite to the iron tube 43 side with respect to the support portion 47 is exposed from the heat insulating member 42 toward the inside of the machine room 10. That is, the copper pipe 44 is exposed from the heat insulating member 42 toward the inside of the machine room 10 except for the portion embedded as the support portion 47 in the heat insulating member 42.

  The iron tube 43 and the copper tube 44 do not have a joint portion between the connecting portion 45 and the support portions 46 and 47 with other members other than the wall portion 2R. That is, the iron pipe 43 is not joined to other members other than the wall portion 2 </ b> R between the connecting portion 45 and the support portion 46. The copper tube 44 is not joined to other members other than the wall portion 2 </ b> R between the connecting portion 45 and the support portion 47.

  As described above, the side condenser 22R of the refrigerator 1 is formed by connecting the iron pipe 43 and the copper pipe 44, which are a plurality of types of pipes made of different materials, with the connecting portion 45, and the refrigerant circulation in the connecting portion 45 Both sides in the direction are supported by the wall portion 2R of the main body housing 2 by the support portions 46, 47, and joint portions other than the wall portion 2R are connected between the connecting portion 45 and the support portions 46, 47. do not have. Thereby, it can prevent that the connection part 45 receives a mechanical load by another member. Further, since the connecting portion 45 is exposed so as to be visible, it is possible to easily find a leak from the connecting portion 45 and repair the leaked portion.

  Here, the said mechanical load is demonstrated using FIG.7 and FIG.8. FIG. 7 is an external perspective view of the machine room 10 when the dryer 26 is assembled. Focusing on the wall 2R on the right side of the refrigerator 1, members not directly connected to the dryer 26 are omitted. Similarly, FIG. 8 is an external perspective view of the machine room 10 when the dryer 26 is stored.

  A decompressor 27, a copper tube 44 and a connector 50 are connected to the dryer 26. The connector 50 is a pipe for evacuating the refrigerant before the refrigerant is sealed in the refrigeration cycle 20. A coupler (not shown) for connecting to the tip of the connector 50 is connected to a vacuum pump at the time of vacuuming, and the tip is welded and cut off after the refrigerant is sealed.

  The dryer 26 containing a filler that absorbs moisture is immediately assembled in the refrigerator 1 after being taken out of the storage room isolated from the outside air, and joined to all the refrigeration cycle components (such as the compressor 21) in the machine room 10 at the same time. Must be cut off from. However, as shown in FIG. 2, the compressor 21 and the evaporating dish 11 are juxtaposed in the width direction in the machine room 10 and the periphery of the dryer 26 is very narrow. Obviously, even smaller refrigerators are even narrower. Therefore, as shown in FIG. 7, it is a general process that the periphery of the dryer 26 is temporarily protruded outside the machine room 10 and joined. However, at this time, a load is applied to the copper tube 44.

  After the refrigerant is sealed in the refrigeration cycle 20, the periphery of the dryer 26 must be returned to the correct position in the machine room 10 as shown in FIG. At this time, the copper tube 44 is subjected to a load that is folded to the inner side.

  According to the configuration of the present embodiment, the mechanical load as described above is not applied to the connection portion 45 that is very structurally weak due to the difference in strength between the iron tube 43 and the copper tube 44. Breakage of the connecting portion 45 can be prevented.

  Further, the wall portion 2R of the main body housing 2 includes a heat insulating member 42, and the side capacitor 22R is embedded in the heat insulating member 42 in the support portions 46 and 47, so that the side capacitor 22R is supported by the wall portion 2R. These members, for example, an adhesive tape, a screw, an adhesive, etc., may not be used. Therefore, with a configuration in which the cost is reduced, it is possible to prevent a mechanical load from being generated in the connecting portion 45 of the side capacitor 22R, and easily find a leak from the connecting portion 45 and repair the leaked portion. be able to.

  The main body housing 2 includes a machine room 10 in which a compressor 21 included as a constituent element of the refrigeration cycle 20 is disposed, and the connecting portion 45 of the side capacitor 22R is exposed to the machine room 10 so as to be visible. Thereby, in the machine room 10, it can prevent that the connection part 45 receives a mechanical load by another member. Further, in the machine room 10, it is possible to easily find a leak from the connecting portion 45 and repair the leaked portion.

  Further, since the refrigerator 1 has a rust-proof coating on the surface of the connecting portion 45, the coating film is peeled off if there is a leak from the connecting portion 45 during a leak test. Therefore, it is possible to easily find a leak.

  And according to the structure of the said embodiment of this invention, breakage in the connection part 45 of the side capacitor 22R which is refrigerant | coolant piping of the refrigerating cycle 20 can be prevented, and the leak test and repair of the connection part 45 are performed easily. The refrigerator 1 which can be provided can be provided.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  For example, in the above embodiment, the side condenser 22R has been described as an example of the refrigerant pipe through which the refrigerant circulates inside the main body housing 2, but the refrigerant pipe is not limited to the side condenser 22R. Other parts such as the back capacitor 22B and the side capacitor 22L may be used. The present invention can also be applied to refrigerant piping other than the capacitor 22.

  Further, in the above embodiment, it is possible to prevent a mechanical load on the connection portion 45 from being involved in the assembly process of the side capacitor 22R and the dryer 26. However, for example, in the case where the side capacitor and the compressor 21 are directly connected (not shown), the mechanical load due to the operating vibration of the compressor 21 can be reduced with respect to the connecting portion 45. Alternatively, in the case of a configuration (not shown) in which a side condenser and a heavy object (for example, a compressor 21, piping with a vibration-proof weight, a refrigerant switching valve, a heat exchanger, etc.) are connected, it is caused by freight transportation vibration when the refrigerator 1 is transported. A mechanical load can be prevented with respect to the connecting portion 45.

  The present invention can be used in refrigerators.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Main body housing | casing 2R Wall part 10 Machine room 20 Refrigeration cycle 21 Compressor 22 Condenser (condenser, refrigerant | coolant piping)
22R side condenser (condenser, refrigerant piping)
27 Pressure reducer 28 Evaporator 30 Control unit 41 Outer plate 42 Heat insulation member 43 Iron pipe (pipe)
44 Copper pipe
45 Connecting part 46, 47 Support part

Claims (4)

In a refrigerator comprising a main body housing and a refrigeration cycle including refrigerant pipes through which refrigerant flows through the interior laid in the main body housing,
The refrigerant pipe is formed by connecting two types of pipes of different materials at a connecting portion,
Each of the two types of pipes on both sides of the connecting portion in the refrigerant flow direction is individually supported by the main body housing at two different support portions,
Of the two types of pipes, one of the pipes in the refrigerant flow direction is connected to an end on the opposite side to the end on the coupling part side, and a component that varies in mechanical load is connected to the pipe.
Between the support part supporting the one pipe and the connecting part, and between the support part supporting the one pipe and a component in which the mechanical load varies, The pipe has no joints with other members,
A refrigerator characterized in that the connecting portion is exposed so as to be visible. 2. The refrigerator according to claim 1, wherein a length of a portion of the one of the pipes that is not supported by the support portion that supports the one of the pipes is longer than a length of the supported portion. . The length of the part of the one pipe supported by the support part that supports the one pipe is the part of the other pipe that is supported by the support part that supports the other pipe. The refrigerator according to claim 1 or 2, wherein the refrigerator is shorter than the length of the refrigerator.   The refrigerator according to any one of claims 1 to 3, wherein a rust-proof coating is applied to a surface of the connecting portion.

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