JPWO2009107360A1 - refrigerator - Google Patents

Abstract

A refrigerator including a heat insulating box body including an outer box, an inner box, and a heat insulating material provided between the outer box and the inner box, wherein the iron pipe and the iron pipe are joined to at least a part of the cooling cycle that constitutes an annular hermetic configuration. A first machine room provided adjacent to the outside of the outer box, and a second machine provided adjacent to the outside of the bottom surface of the outer box at a position different from the first machine room. A refrigerator, wherein the piping passes through the first machine room and the second machine room, and at least one of the plurality of joints is disposed in the first machine room and the second machine room. It is.

Description

  The present invention relates to a refrigerator.

  A refrigerator includes many devices such as a compressor, an evaporator, a dryer, a valve, and a heat exchanger that constitute a cooling cycle. Conventionally, most of the many devices are disposed in a machine room disposed at the lower part of the refrigerator. For this reason, piping connecting these many devices is complicatedly arranged in the machine room (see, for example, Patent Document 1).

  Since there are many joints connecting these pipes in the machine room, copper pipes that are easily welded are generally used for the pipes.

  However, in order to reduce costs, an iron pipe that is cheaper than a copper pipe may be used for at least a part of the piping of the cooling cycle. In this case, it is necessary to perform silver brazing welding for welding the copper pipe and the iron pipe instead of copper brazing welding for welding the copper pipe and the copper pipe. However, this silver brazing welding requires a work process such as application of a flux to make the silver brazing easy to melt and removal of the flux, and therefore, the number of work man-hours is increased as compared with copper brazing welding. In silver soldering, it is necessary to secure a working space for performing welding work and shorten the welding time.

However, in the conventional configuration in which many pipe joints exist in the machine room, the work space for welding the joints is narrow. For this reason, it becomes difficult to secure a work space in each work process such as pipe welding or flux removal, and workability is deteriorated, such as spending work time.
Japanese Patent Laid-Open No. 7-146054

  The present invention is a refrigerator including a heat insulating box body including an outer box, an inner box, an outer box, and a heat insulating material provided between the inner box, and an iron pipe and an iron pipe are provided at least in a part of the cooling cycle in an annular sealed configuration. A pipe having a plurality of joints to be joined, a first machine room provided adjacent to the outside of the outer box, and provided adjacent to the outside of the bottom part of the outer box at a position different from the first machine room A second machine room, and the piping passes through the first machine room and the second machine room, and at least one of the plurality of joints is connected to the first machine room and the second machine room. It is a refrigerator arranged.

  In such a refrigerator, since the machine room is divided into two places of the heat insulation box, that is, the first machine room and the second machine room, the number of devices in the machine room per place is reduced and the configuration of the piping is simple. Become. That is, the number of welded parts of the piping in the machine room per place is reduced. Therefore, at least one joint portion of the iron pipe welded and joined by silver soldering has a wide space around the welded portion of the pipe, so that a work space for welding work can be secured and work time can be shortened.

FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing the refrigerator from the back. FIG. 3A is a perspective view showing a first machine room of the refrigerator. FIG. 3B is a schematic view showing a first machine room of the refrigerator. FIG. 4 is a perspective view showing a second machine room of the refrigerator. FIG. 5 is a perspective view showing a configuration of piping of the refrigerator. FIG. 6 is a perspective view showing that the second ferrous pipe of the refrigerator is pressed against the heat insulating material. FIG. 7 is a view for explaining a welding compatible space for welding the iron pipe and the copper pipe of the refrigerator. FIG. 8A is a front view for explaining the joining direction of the joint of the refrigerator. FIG. 8B is a cross-sectional view illustrating the joining direction of the joint of the refrigerator. FIG. 9A is a cross-sectional view of the refrigerator in the second embodiment of the present invention. FIG. 9B is a rear view of the refrigerator. FIG. 10 is a rear perspective view of the refrigerator according to Embodiment 3 of the present invention. FIG. 11A is a perspective view showing the configuration of the piping of the refrigerator in the fourth embodiment of the present invention. FIG. 11B is a perspective view showing a configuration of another pipe of the refrigerator. FIG. 11C is a perspective view showing a configuration of another pipe of the refrigerator. FIG. 11D is a perspective view showing a configuration of another pipe of the refrigerator. FIG. 11E is a perspective view showing a configuration of another pipe of the refrigerator. FIG. 12 is a perspective view showing a configuration of the piping of the refrigerator in the fifth embodiment of the present invention. FIG. 13 is a cross-sectional view of the refrigerator in the sixth embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,120,130,160 Refrigerator 101 Heat insulation box 102 1st refrigeration room 103 2nd refrigeration room 104 Freezing room 105 Ice making room 106 Switching room 107 Heat insulation door 108 Heat insulation board 200,220,230 1st machine room 201 Compressor 202 Dryer 203 First iron pipe 204 Second iron pipe 205 First copper pipe 206 Second copper pipe 211 Fan 211a Fan cover 233, 244 Second joint 235, 246 First joint 300 Second machine chamber 301 Evaporating dish 303 First Three copper pipes 304 Fourth copper pipes 305 Fifth copper pipes 306 Sixth copper pipes 400 Thermal insulation

  1st invention is a refrigerator provided with the heat insulation box which consists of an outer box, an inner box, an outer box, and the heat insulating material provided between inner boxes, Comprising: An iron pipe and at least one part which comprise a cyclic | annular sealing structure of a cooling cycle, and A pipe having a plurality of joints to which the iron pipe is joined, a first machine room provided adjacent to the outside of the outer box, and an outer side of the bottom part of the outer box at a position different from the first machine room. And the piping passes through the first machine chamber and the second machine chamber, and at least one of the plurality of joint portions is the first machine chamber and the second machine chamber. It is the refrigerator arrange | positioned. In such a refrigerator, since the machine room is divided into two places of the heat insulation box, that is, the first machine room and the second machine room, the number of devices in the machine room per place decreases, The configuration is simple. That is, the number of welded parts of the piping in the machine room per place is reduced. Therefore, at least one joint part of the iron pipe welded and joined by silver brazing welding has a wide space around the welded part of the pipe, so that a work space for welding work can be secured and work time can be shortened. it can.

  According to a second invention, in the first invention, the piping is a first pipe at least partially disposed in the first machine chamber, a second pipe at least partially disposed in the second machine chamber, An iron pipe connecting the one pipe and the second pipe, the first joint where the first pipe and one end of the iron pipe are weld-joined is disposed in the first machine chamber, and the other end of the second pipe and the iron pipe It is the refrigerator which arrange | positions the 2nd junction part where and are weld-joined in a 2nd machine room. In such a refrigerator, since the machine room is divided into two places of the heat insulation box, that is, the first machine room and the second machine room, the number of devices in the machine room per place decreases, The configuration is simple. That is, the number of welded parts of the piping in the machine room per place is reduced. Therefore, the first joint where the first pipe and one end of the iron pipe are welded together by silver soldering, and the second joint where the second pipe and the other end of the iron pipe are welded together by silver soldering are: The space around the welded portion of the pipe is widened, a work space for welding work can be secured, and the work time can be shortened.

  According to a third invention, in the second invention, the first pipe is a first copper pipe and a second copper pipe made of a copper material, and the second pipe is a third copper pipe and a fourth copper pipe made of a copper material. It is a refrigerator. In such a refrigerator, since the machine room is divided into two places of the heat insulation box, that is, the first machine room and the second machine room, the number of devices in the machine room per place decreases, The configuration is simple. That is, the number of welded parts of the piping in the machine room per place is reduced. Accordingly, a first joint where the first copper pipe and one end of the iron pipe are welded and joined by silver soldering, and a second joint where the second copper pipe and the other end of the iron pipe are welded and joined by silver soldering; Since the space around the welded part of the pipe is widened, a work space for welding work can be secured, and the work time can be shortened.

  Further, the pipe having at least a portion disposed in the first machine chamber and the tube having at least a portion disposed in the second machine chamber are copper tubes, so that at least a portion is disposed in the first machine chamber. Compared to the case where the pipe to be arranged and the pipe at least partially arranged in the second machine chamber are made of iron pipe, the iron pipe has higher hardness and easily transmits vibration, but the copper pipe has lower hardness than the iron pipe. Therefore, vibration transmission from the rotating device can be absorbed and attenuated. For this reason, the noise and vibration of the refrigerator can be reduced.

  4th invention was equipped with the compressor provided in the 1st machine room in 1st invention, and the evaporating dish which stores and evaporates the defrost water which is provided in the 2nd machine room and is generated by a cooling cycle. It is a refrigerator. In such a refrigerator, since the machine room is divided into two upper and lower portions of the heat insulating box on the compressor side and the evaporating dish side, the number of devices in the machine room per place is reduced, and the configuration of the piping is simplified. That is, the number of welded parts of the piping in the machine room per place is reduced. Accordingly, a first joint where the first copper pipe and one end of the iron pipe are welded and joined by silver soldering, and a second joint where the second copper pipe and the other end of the iron pipe are welded and joined by silver soldering; Since the space around the welded part of the pipe is widened, a work space for welding work can be secured, and the work time can be shortened.

  Further, the pipe having at least a portion disposed in the first machine chamber and the tube having at least a portion disposed in the second machine chamber are copper tubes, so that at least a portion is disposed in the first machine chamber. Compared to the case where the pipe to be arranged and the pipe at least partially arranged in the second machine chamber are made of iron pipe, the iron pipe has higher hardness and easily transmits vibration, but the copper pipe has lower hardness than the iron pipe. Therefore, vibration transmission from the rotating device can be absorbed and attenuated. For this reason, the noise and vibration of the refrigerator can be reduced.

  Furthermore, the capacity of the lower storage room can be remarkably improved, and a dead space that is difficult to reach at the top can be used as a machine room, so that the actual storage capacity of the refrigerator can be improved.

  5th invention is the refrigerator which provided the 1st machine room in the back part of the heat insulation box in 1st invention. In such a refrigerator, since the machine room is divided into two places of the heat insulation box, that is, the first machine room and the second machine room, the number of devices in the machine room per place decreases, The configuration is simple. That is, the number of welded parts of the piping in the machine room per place is reduced. Therefore, the first joint where the first pipe and one end of the iron pipe are welded together by silver soldering, and the second joint where the second pipe and the other end of the iron pipe are welded together by silver soldering are: The space around the welded portion of the pipe is widened, a work space for welding work can be secured, and the work time can be shortened.

  Furthermore, by providing the first machine room on the back surface of the heat insulation box, for example, when a wire-type iron pipe is disposed on the back surface of the heat insulation box, the piping configuration of the cooling cycle is simplified. It enables shortening of welding time and working time.

  According to a sixth aspect of the present invention, in the second aspect, the first joint and the second joint are arranged in a weldable space in which the wall of the first machine chamber and the wall of the second machine chamber are not heated by the flame during welding, respectively. It is a refrigerator. Such a refrigerator can secure a working space for welding work by arranging the joint portion in the welding compatible space. Further, even when the welded portion is not arranged in the welding compatible space, if the welded portion is pulled out to the welding compatible space at the time of welding and can be arranged in the welding compatible space, a work space for welding work can be secured. . Thereby, while being able to ensure the work space of welding work, since an operator can perform welding work easily, working time can be shortened.

  7th invention is a refrigerator whose 1st copper pipe is a joint pipe which connects an iron pipe and the dryer which removes the water | moisture content in the refrigerant | coolant of a cooling cycle in 3rd invention. In such a refrigerator, the dryer has a large thickness and volume, and a large amount of heat capacity is required to perform silver soldering with an iron pipe, so that a long time is required for the welding operation. For this reason, by arranging a copper joint pipe between the dryer and the iron pipe, the silver solder welding between the dryer and the iron pipe can be changed to the copper solder welding between the dryer and the copper pipe, thereby shortening the working time. be able to.

  In addition, the iron pipe has a high hardness and easily transmits vibration, but the copper pipe has a lower hardness than the iron pipe, so that it can absorb and attenuate the vibration transmission from the rotating equipment. For this reason, the noise and vibration of a refrigerator can be reduced by using a copper joint pipe.

  An eighth invention is a refrigerator according to the second invention, wherein the first joint portion is a first pipe and an iron pipe, and the second joint portion is a horizontal direction in which the second pipe and the iron pipe are butted. In such a refrigerator, when silver solder is welded, the silver solder melts and falls from the upper part of the joint by its own weight, and flows around the joint, thereby applying silver solder to the entire circumference of the joint. Can do. Therefore, since the silver wax can be easily applied, the working time can be shortened.

  According to a ninth invention, in the first invention, at least a part of the iron pipe is arranged along the inner surface of the outer box, the heat insulating material presses a part of the iron pipe against the outer box, and the heat insulating material has a plate shape having heat insulating properties. It is the refrigerator which is a member. Such a refrigerator can be welded in a state where the iron pipe is fixed by pressing the iron pipe by using a heat insulating material necessary for ensuring heat insulation. Therefore, the welding operation is facilitated and the operation time can be shortened.

  In addition, since the iron pipe is pressed against the outer box and the iron pipe and the outer box are in close contact with each other, the heat radiation performance from the iron pipe to the outer box side is improved, and deformation of the outer box can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention. As shown in FIG. 1, the refrigerator 100 includes a double-folded door at the top, and includes a plurality of storage compartments in a heat insulating box 101 that separates the inside and the outside of the refrigerator 100 in a heat insulating state. .

  The storage compartment divided into a plurality of the refrigerator 100 has a first refrigeration chamber 102, an ice making chamber 105, a switching chamber 106 in which the temperature inside the refrigerator can be changed, a second refrigeration chamber 103, and a freezer. It may be referred to as distinguished from the chamber 104 or the like.

  At the front opening of the first refrigerator compartment 102 located at the top of the refrigerator 100, a rotary heat insulating door 107 filled with a heat insulating material such as urethane is provided. The first refrigerator compartment 102 is a shelf-like storage space.

  Further, the ice making chamber 105, the switching chamber 106, the second refrigeration chamber 103, and the freezing chamber 104 disposed below the first refrigeration chamber 102 are drawer-type storage spaces. Each drawer is provided with a heat insulating plate 108 as a front plate, thereby sealing the storage chamber so as not to leak cold air.

  The heat insulation box 101 is a rectangular parallelepiped box which is formed by filling a heat insulating material such as hard foamed urethane between a metal outer box and a resin inner box. The heat insulation box 101 has a function of blocking heat that is about to flow into the heat insulation box 101 from the outside atmosphere (atmosphere).

  FIG. 2 is a perspective view showing the refrigerator according to the first embodiment of the present invention from the back side. In the first embodiment of the present invention, the case where the first machine room 200 provided adjacent to the outside of the outer box of the heat insulation box 101 is arranged in the uppermost rear region of the heat insulation box 101 will be described. .

  As shown in FIG. 2, a recess (not shown) is formed in the upper part of the refrigerator 100 so as to form a stepped downward direction toward the back of the refrigerator 100, and the first machine room 200 is formed in the recess. Is formed. In other words, the first machine room 200 is formed in a state of being bitten into the uppermost rear region outside the heat insulating box 101.

  In addition, a groove-shaped recess that opens in the back direction is formed in the lower portion of the refrigerator 100, and a second machine chamber 300 is formed in the recess at a position different from the first machine chamber 200. That is, the second machine room 300 is formed in a state where it is bitten into the lowermost rear region outside the heat insulating box 101.

  That is, the first machine room 200 is provided adjacent to the outside of the outer box, and the second machine room 300 is provided adjacent to the outside of the bottom surface of the outer box at a position different from the first machine room 200. .

  Here, conventionally, one machine room is generally provided in the rear region of the lowermost storage chamber of the heat insulation box 101. For this reason, the mode in which the machine room is divided into the first machine room 200 and the second machine room 300 reduces the number of devices in the machine room per place compared to the conventional refrigerator, and the configuration of the piping Becomes simple.

  Moreover, the capacity | capacitance of the lowest storage rooms, such as the 2nd refrigerator compartment 103, can be improved markedly compared with the conventional refrigerator. And since the dead space which the uppermost hand of the 1st refrigerator compartment 102 cannot reach can be used as the 1st machine room 200, the substantial accommodation volume of the refrigerator 100 can be increased.

  Normally, the first machine room 200 and the second machine room 300 are covered with a cover (not shown) to prevent noise.

  Here, the machine room refers to a space for arranging and storing at least one part related to the cooling cycle.

  FIG. 3A is a perspective view showing a first machine room of the refrigerator in Embodiment 1 of the present invention, and FIG. 3B is a schematic view showing a first machine room of the refrigerator.

  As shown in FIG. 3A, the first machine room 200 is a space in which components such as a compressor 201, a fan 211 for cooling the compressor 201, a dryer 202, and the like, mainly components on the high pressure side of the cooling cycle are stored. is there.

  The compressor 201 is one of the components that form the cooling cycle, and is a device that compresses the refrigerant. The compressor 201 is placed on a vibration-proof rubber (not shown) and attached to the first machine room 200.

  The dryer 202 is a device for removing moisture in the refrigerant circulating in the cooling cycle. The dryer 202 is attached and fixed to the fan cover 211a of the fan 211.

  The piping that constitutes an annular hermetic cooling cycle has an iron pipe and a plurality of joints to which the iron pipe is joined. And piping goes through the 1st machine room 200 and the 2nd machine room 300, and at least one of a plurality of joined parts is arranged in the 1st machine room 200 and the 2nd machine room 300. Has been.

  The compressor 201 and the dryer 202 form a cooling cycle by being connected to the first iron pipe 203, the second iron pipe 204, the first copper pipe 205, the second copper pipe 206, and the like. The first iron pipe 203 and the second iron pipe 204 are heat-dissipating pipes and are steel pipes obtained by subjecting a steel pipe to rust prevention plating or copper plating. Further, the first copper pipe 205 and the second copper pipe 206 are disposed in the vicinity of the compressor 201.

  Specifically, as shown in FIG. 3B, the dryer 202 and one end of the first iron pipe 203 are welded and joined via a first copper pipe 205.

  Here, as the fan 211 rotates, vibration is transmitted from the fan cover 211 a to the dryer 202. At this time, since the copper pipe has a lower hardness than the iron pipe, the first copper pipe 205 can absorb and attenuate this vibration, and the noise and vibration of the refrigerator 100 can be reduced.

  Further, the second copper pipe 206 and one end of the second iron pipe 204 are joined by welding.

  And the 1st junction part 235 which is a junction part of these 1st iron pipes 203 and the 1st copper pipe 205, and the 1st junction part 246 which is a junction part of the 2nd iron pipe 204 and the 2nd copper pipe 206, It is arranged in the vicinity of the compressor 201. Specifically, the first joint portions 235 and 246 are disposed in the first machine room 200.

  In addition, the 1st iron pipe 203 and the 2nd iron pipe 204 are named generically as an iron pipe. Moreover, the 1st copper pipe 205 and the 2nd copper pipe 206 are called a 1st pipe | tube, and the 1st copper pipe 205 is also called a joint pipe | tube. Here, at least a part of the first pipe is disposed in the first machine room 200.

  FIG. 4 is a perspective view showing a second machine room of the refrigerator in the first embodiment of the present invention. As shown in FIG. 4, an evaporating dish 301 is disposed at the bottom of the second machine room 300.

  The evaporating dish 301 is one of the components that form a cooling cycle, and is a device that stores and evaporates defrost water generated by the cooling cycle. Further, a fourth copper pipe 304 for evaporating the defrosted water is disposed on the evaporating dish 301.

  FIG. 5 is a perspective view showing the configuration of the piping of the refrigerator in the first embodiment of the present invention. As shown in FIG. 5, the second iron pipe 204 is welded by a fourth copper pipe 304 and a second joint 244. Further, the second iron pipe 204 passes through the third copper pipe 303 arranged in the vicinity of the evaporating dish 301 via the condensation pipe 303a for preventing condensation, which is arranged at the periphery of the front opening of the heat insulating box 101, and then the first iron pipe. 203 and the second joint 233 are welded.

  The third copper pipe 303 uses the extension pipe of the condensation pipe 303a for preventing dew condensation as it is, and may not be provided separately.

  And the 2nd junction 233 which is a junction of these 1st iron pipes 203 and the 3rd copper pipe 303, and the 2nd junction 244 which is a junction of the 2nd iron pipe 204 and the 4th copper pipe 304, It is arranged near the evaporating dish 301. Specifically, the second joint portions 233 and 244 are disposed in the second machine room 300.

  The third copper pipe 303 and the fourth copper pipe 304 are referred to as a second pipe. Here, at least a part of the second pipe is disposed in the second machine chamber 300. Thus, the piping of the cooling cycle includes a first pipe and an iron pipe connecting the second pipe. The first joints 235 and 246 are welded to the first pipe and one end of the iron pipe, and the second joints 233 and 234 are welded to the second pipe and the other end of the iron pipe.

  FIG. 6 is a perspective view showing that the second ferrous pipe of the refrigerator according to Embodiment 1 of the present invention is pressed against the heat insulating material. As shown in FIG. 6, at least a part of the second ferrous pipe 204 is disposed along the inner surface of the outer box of the heat insulating box 101. And the heat insulating material 400 is adhere | attached on an outer case, pressing the 2nd iron pipe 204 against an outer case.

  The heat insulating material 400 is a plate-like member having heat insulating properties, for example, a vacuum heat insulating material. In addition, a groove is formed on the surface of the heat insulating material 400 along the second iron pipe 204 on the surface in contact with the second iron pipe 204.

  In this way, the second ferrous pipe 204 is pressed against the outer box by the heat insulating material 400 necessary to ensure heat insulation. Further, since the second ferrous pipe 204 and the outer box are in close contact with each other, the heat radiation performance from the second ferrous pipe 204 to the outer box side is improved, and deformation of the outer box can be prevented.

  Similarly, the ferrous pipe 203 is also pressed against the outer box by the heat insulating material 400.

  Next, the welding operation between the iron pipe and the copper pipe will be described below.

  The welding between the iron pipe and the copper pipe is performed by silver brazing. Since silver solder welding requires more time than copper solder welding, it is necessary to secure a working space for welding work and shorten the work time. By dividing the machine room into two parts, the first machine room 200 and the second machine room 300, the number of devices in the machine room per place is reduced, and the configuration of the piping is simplified. That is, the number of welded parts of the piping in the machine room per place is reduced. Therefore, the space around the welded portion of the pipe is widened, and a large work space for welding work can be secured.

  FIG. 7 is a diagram for explaining a welding compatible space for welding the iron pipe and the copper pipe of the refrigerator in the first embodiment of the present invention.

  Here, the welding compatible space is a space predetermined as a space suitable for welding. And the junction part of an iron pipe and a copper pipe is provided so that arrangement | positioning is possible in a welding compatible space.

  Silver brazing welding, which is a welding of an iron pipe and a copper pipe, is performed over a long period of time, and if the wall of the machine room is heated during welding, the machine room may be burned out. In this case, work for preventing burnout is required, and work time is required. For this reason, it is necessary to perform welding in such a direction that the flame direction during welding does not face the wall of the machine room so that the wall of the machine room is not heated.

  That is, it is necessary to arrange the welded portion of the pipe outside the region surrounded by the wall of the machine room.

  Specifically, as shown in FIG. 7, the wall W of the machine room is a stepped wall, and the joint P of the pipe is welded. Here, the X-axis direction is the horizontal direction, and the Y-axis direction is the vertical direction. In this case, when welding the joint P, welding is performed such that the flame B during welding is directed in a direction inclined by θ degrees or more from the X-axis direction, which is a direction not directed to the wall W of the machine room, in the Y-axis direction. Need to do. That is, the joint portion P needs to be arranged in a direction away from the wall W from a line connecting the corner portion W1 of the wall W and the corner portion W2. A space in which such a joint P is arranged is a welding compatible space.

  Here, the welding compatible space is not limited to the space where the joint portion P shown in FIG. 7 where the stepped wall W is not heated is arranged, but the joint portion P where all the walls of the machine room are not heated is provided. The space to be arranged is a welding compatible space.

  Even when the joint P is not arranged in the welding compatible space, it is sufficient that the joint P is drawn out to the welding compatible space during welding and can be arranged in the welding compatible space.

  Then, by dividing the machine room into two rooms of the first machine room 200 and the second machine room 300, the configuration of the piping becomes simple, and a wide welding compatible space can be secured. Further, since the joint P is arranged in the welding compatible space, a work space for the welding work can be secured, and further, the worker can easily perform the welding work, so that the work time can be shortened. it can.

  FIG. 8A is a front view for explaining the joining direction of the joint portion of the refrigerator in Embodiment 1 of the present invention, and FIG. 8B is a cross-sectional view for explaining the joining direction of the joint portion of the refrigerator.

  As shown in FIG. 8A, the copper pipe P1 and the iron pipe P2 are joined by butt welding. And the butt | matching direction of the junction part of butt welding is a horizontal direction.

  As a result, as shown in FIG. 8B, when silver soldering is performed, the silver solder R melts and falls from the upper part of the joint P so as to come into contact with the joint P by its own weight, and flows down around the joint P. The silver solder R can be applied to the entire circumference of the joint P.

  That is, when the silver solder R is brought close to the joint P after heating the joint P, the silver solder R is dissolved and liquefied. Then, the silver solder R flows down around the joint P due to its own weight, so that the silver solder R flows down all around the joint P. Then, the silver solder R flows into the gap of the joint P and solidifies. Since the silver braze R is dropped and brazed by its own weight in this way, it is easier to braze the joining direction of the joining portion in the horizontal direction than in the case where the abutting direction is the vertical direction.

  Here, the first joints 235 and 246 are in the horizontal direction, and the second joints 233 and 234 are in the horizontal direction in which the second pipe and the iron pipe are abutted.

  In addition, since it can be firmly welded by silver soldering, it is not affected by thermal elongation even if it is welded in the horizontal direction, so that the welding work can be performed without defects in the joint portion, and workability is improved. .

  Therefore, by making the butt joint direction of the butt joint horizontal, the silver solder is melted during silver solder welding and falls down from the upper part of the joint by its own weight, flows down around the joint, and all of the joint Silver solder can be easily applied to the periphery. Therefore, the welding work time can be shortened.

  As shown in FIGS. 3A and 3B, a first copper pipe 205 is disposed between the dryer 202 and the first iron pipe 203. This is because the dryer 202 has a large wall thickness, and a large amount of heat capacity is required to perform silver brazing welding, which is welding to the first ferrous pipe 203, and much time is required for the welding operation. That is, by disposing the first copper pipe 205 between the dryer 202 and the first iron pipe 203, the silver brazing welding of the dryer 202 and the first iron pipe 203 can be performed with the copper brazing between the dryer 202 and the first copper pipe 205. It can be changed to welding, and the work time of welding work can be shortened.

  There are the following two methods for joining the dryer 202, the first copper pipe 205 and the first iron pipe 203.

  The first construction method is a method in which the dryer 202 and the first copper pipe 205 are welded in advance, and then the first copper pipe 205 and the first iron pipe 203 are welded. The length of the first copper pipe 205 is shorter than the first copper pipe 205 of the second construction method described later.

  Here, as shown in FIG. 3B, the dryer 202 is attached to the fan cover 211a. And since the 1st copper pipe 205 of the 1st construction method is comparatively short, the dryer 202 and the 1st copper pipe 205 which were weld-joined beforehand are integrated and fixed to the fan cover 211a. The first iron pipe 203 is fixed to the heat insulating box 101.

  As described above, since both sides of the joint portion between the first copper pipe 205 and the first iron pipe 203 are fixed, it is possible to efficiently transmit the load without escaping the load applied to the joint portion in the flux removal work during welding. it can. Thereby, for example, the load applied to the welded portion by a gold brush or the like can be efficiently transmitted, and the efficiency of removing the flux can be increased. Thereby, the work time of welding work can be shortened.

  The second method is a method in which the first copper pipe 205 and the first iron pipe 203 are welded and joined in advance, and the dryer 202 and the first copper pipe 205 are welded and joined. In addition, the length of the 1st copper pipe 205 is made longer than the 1st copper pipe 205 of a 1st construction method.

  Here, by welding the first copper pipe 205 and the first iron pipe 203 in advance, the joint can be welded with high strength. Moreover, the length of the 1st copper pipe 205 of a 2nd construction method is a comparatively long thing. For this reason, the vibration which generate | occur | produces by an operation | work can be absorbed by the 1st copper pipe 205, and can be suppressed. Thereby, the vibration of the junction part at the time of welding with the dryer 202 and the 1st copper pipe 205 is suppressed, and the working time of welding work can be shortened.

  Also, by welding the first copper pipe 205 and the first iron pipe 203, which are silver brazing, in advance, if the welding of the dryer 202 and the first copper pipe 205, which is copper brazing, is performed in the field work, Well, the work time of welding work can be shortened.

  Moreover, as shown in FIG. 6, the ferric pipe 204 is pressed against the outer box by a heat insulating material 400 necessary to ensure heat insulation. Thus, welding can be performed in a state where the second ferrous pipe 204 is fixed by pressing the second ferrous pipe 204 with the heat insulating material 400. Therefore, the welding operation is facilitated and the operation time can be shortened.

  From these things, according to the refrigerator of Embodiment 1 of this invention, even when using an iron pipe for some piping of a cooling cycle, the working space of welding work can be ensured and working time is shortened. be able to.

  The refrigerator of Embodiment 1 of the present invention disclosed this time is illustrative in all points and is not restrictive.

  For example, in Embodiment 1 of the present invention, the first iron pipe 203 and the second iron pipe 204 are iron pipes obtained by subjecting a steel pipe to rust prevention plating or copper plating, but are iron pipes that are not subjected to rust prevention plating or copper plating. There may be.

  Moreover, in Embodiment 1 of this invention, although the heat insulating material 400 which press-contacts the 2nd iron pipe 204 to an outer case was considered as a plate-shaped vacuum heat insulating material with a groove | channel, the heat insulating material 400 attached the 2nd iron pipe 204 to an outer case. Any member may be used as long as it has a heat insulating property capable of being pressed against.

  In addition, what is necessary is just to make it weld so that the butt | matching direction of a junction part may become a horizontal direction at the time of manufacture.

  In the first embodiment of the present invention, the first joint portions 235 and 246 and the second joint portions 233 and 244 are joint portions between the copper tube and the iron tube, but may be joint portions between the iron tube and the iron tube. That is, the iron pipe and the iron pipe may be joined by silver soldering.

  In the first embodiment of the present invention, the first iron pipe 203 and the second iron pipe 204 are configured such that the opening portions at both ends thereof are separated into the first machine chamber 200 and the second machine chamber 300 and joined to each other. . However, the present invention is not limited to this, and both end openings of the first iron pipe 203 and both end openings of the second iron pipe 204 are arranged separately in the first machine room 200 and the second machine room 300, respectively. You may join with other piping.

  That is, referring to FIG. 5, the end opening of the second iron pipe 204 opened in the second machine room 300 is directly joined to the start end opening of the first iron pipe 203 in the same second machine room 300. To do. And after opening the terminal opening of the 1st iron pipe 203 through the heat insulation box, it opens again in the 2nd machine room 300, and this terminal opening is joined with the 3rd copper pipe 303, and it becomes condensation condensation pipe 303a for dew condensation prevention. It is good also as a piping structure to connect.

  In this case, the condensation pipe 303a for preventing condensation is arranged on the most downstream side of the condensation pipe on the high pressure side so that the pipe temperature is not raised, and heat intrusion from the front opening edge of the heat insulating box 101 to the inside of the cabinet is suppressed. This is an effective pipe in some cases.

  That is, the opening portions at both ends of the first iron pipe 203 or the second iron pipe 204 are not necessarily arranged separately in the first machine room 200 and the second machine room 300, but are arranged in the same machine room space. Also good. Also in this case, a plurality of machine room spaces are provided, a large work space for welding work can be secured, and welding workability can be improved.

(Embodiment 2)
In the refrigerator 120 according to the second embodiment of the present invention, a case will be described in which the first machine room 220 is disposed on the back surface of the heat insulating box. In the second embodiment of the present invention, only differences from the first embodiment of the present invention will be described.

  FIG. 9A is a sectional view of the refrigerator according to Embodiment 2 of the present invention, and FIG. 9B is a rear view of the refrigerator. As shown in FIGS. 9A and 9B, the first machine room 220 is a space arranged at the back of the heat insulation box, and a condenser in which an iron pipe 500 is formed in a wire shape is accommodated in this space. .

  Thus, when a wire type iron pipe is arrange | positioned in the back surface part of a heat insulation box, the piping structure of a cooling cycle is simplified and it can shorten welding time and working time. Then, the second machine chamber 300 is provided in the lower part of the heat insulation box at a position different from the first machine chamber 220, and a compressor (not shown) is arranged in the second machine chamber 300. Even with such a configuration, a plurality of machine room spaces can be provided to ensure a wide working space for welding work, and welding workability can be improved.

  In Embodiment 2 of the present invention, it is possible to radiate heat from the condenser by natural convection without forcibly blowing air using a blower.

(Embodiment 3)
In the refrigerator 130 according to the third embodiment of the present invention, a case will be described in which the first machine room 230 provided in one section of the heat insulation box is arranged in the middle part of the back surface of the heat insulation box. In the third embodiment of the present invention, only differences from the first embodiment of the present invention will be described.

  FIG. 10 is a rear perspective view of the refrigerator in the third embodiment of the present invention. In the refrigerator 130, the first machine room 230 is a space in which a recess is formed in the middle part of the back surface of the heat insulation box, and the compressor 201 is disposed in the first machine room 230. And the 2nd machine room 300 is provided in the lower part of the heat insulation box in the position different from the 1st machine room 230, and the condenser which comprised the iron pipe (not shown) in the wire shape in the 2nd machine room 300 is provided. It is the arranged configuration.

  Thus, when a wire type iron pipe is arrange | positioned in the middle part of the back surface of a heat insulation box, the piping structure of a cooling cycle is simplified and it can shorten welding time and working time. Even with such a configuration, a plurality of machine room spaces can be provided to secure a wide work space for welding work, and welding workability can be improved.

(Embodiment 4)
In the fourth embodiment of the present invention, only differences from the first embodiment of the present invention will be described. FIG. 11A is a perspective view showing the configuration of the piping of the refrigerator in the fourth embodiment of the present invention. As shown to FIG. 11A, the path | route from the compressor 201 of the cooling cycle to the dryer 202 is the compressor 201, the 2nd copper pipe 206, the 2nd iron pipe 204, the 4th copper pipe 304 installed in an evaporating dish, the refrigerator front A third copper pipe 303, a first iron pipe 203, a first copper pipe 205, and a dryer 202 are provided at the outer periphery.

  Thereby, since the high temperature gas discharged from the compressor 201 is radiated in the second copper pipe 206 and the second iron pipe 204 of the first machine room provided at the upper part of the heat insulation box, the bottom portion of the heat insulation box The ambient temperature in the second machine room provided adjacent to the outside of the machine is not as high as in the prior art. As a result, the amount of heat entering the interior from the second machine room outside the warehouse is reduced.

  On the other hand, in the first machine room, the ambient temperature rises as a result of heat radiation in the second copper pipe 206 and the second iron pipe 204. However, the uppermost stage of the refrigerator 100 is often a refrigerated room having a relatively high internal set temperature. As a result, the temperature difference between the inside and outside of the refrigerator is greatly reduced as compared with the freezer room in the lowermost stage. Furthermore, since the first machine room has a space up to the ceiling of the room, the air flow rate is also increased as compared with the second machine room, and the amount of heat entering from the first machine room into the cabinet is suppressed.

  As a result, the cooling capacity of the entire refrigerator is improved, and the power consumption can be further reduced.

  Moreover, FIG. 11B is a perspective view which shows the structure of the other piping of the refrigerator in Embodiment 4 of this invention. For example, a fifth copper pipe 305 is added between the fourth copper pipe 304 and the third copper pipe 303 in FIG. 11A and along the bottom of the refrigerator. Thereby, dew condensation of a refrigerator bottom face part and a front lower part outline can be prevented, and a reliable refrigerator can be provided.

  Moreover, FIG. 11C is a perspective view which shows the structure of the other piping of the refrigerator in Embodiment 4 of this invention. The second copper pipe 206 of FIG. 11A is a fin tube type heat exchanger composed of, for example, a large number of flat fins and a refrigerant pipe through which a refrigerant flows. Thereby, a condensation capacity increases and the power consumption of a refrigerator can be reduced.

  FIG. 11D is a perspective view showing a configuration of another pipe of the refrigerator according to Embodiment 4 of the present invention. In FIG. 11A, the third copper pipe 303 disposed on the front outer periphery of the first refrigerator compartment 102 is abolished. is doing. Thereby, the amount of heat entering the interior from the pipe can be reduced, and the power consumption of the refrigerator can be reduced.

  FIG. 11E is a perspective view showing a configuration of another pipe of the refrigerator in the fourth embodiment of the present invention. In FIG. 11A, a sixth copper pipe 306 is additionally provided on the refrigerator rear side. Thereby, a condensation capability will increase and the power consumption of a refrigerator can be reduced. Furthermore, the refrigerator which prevents the dew condensation on the refrigerator back surface can be provided.

(Embodiment 5)
In the fifth embodiment of the present invention, only differences from the first embodiment of the present invention will be described. FIG. 12 is a perspective view showing the configuration of the piping of the refrigerator in the fifth embodiment of the present invention. As shown in FIG. 12, the path from the compressor 201 to the dryer 202 is on the compressor 201, the second copper pipe 206, the second iron pipe 204, the fourth copper pipe 304 installed in the evaporating dish 301, and the outer peripheral edge of the refrigerator front. The third copper pipe 303 and the dryer 202 are installed. That is, the first iron pipe and the first copper pipe are not provided, and the dryer 202 is provided after the third copper pipe 303.

  Conventionally, the third copper pipe 303 goes rearward from the outer peripheral edge of the front face of the refrigerator, and further goes upward of the refrigerator by the first iron pipe to reach the final dryer 202. In this process, when the third copper pipe 303 passes the outer peripheral edge of the front surface of the refrigerator, the pipe is cooled by the cold air leaking from the gap between the door and the outer box, and the refrigerant is condensed and liquefied. However, after that, the path distance to the dryer is long, and the refrigerant liquefied by heat exchange with the outside of the pipe is vaporized again, so that there is a problem that the heat dissipation capability is remarkably lowered.

  However, in Embodiment 5 of the present invention, the path from the compressor 201 to the dryer 202 is the compressor 201, the second copper pipe 206, the second iron pipe 204, the fourth copper pipe 304 installed in the evaporating dish 301, The third copper pipe 303 and the dryer 202 are installed at the outer periphery of the front surface of the refrigerator. As a result, the distance from the outer periphery of the front surface of the refrigerator 303 to the back of the refrigerator 202 can be shortened compared to the prior art. It can be greatly reduced. And the gas ratio in a refrigerant | coolant can be reduced, a refrigerant | coolant circulation amount and a refrigerating capacity can be increased, and the power consumption of a refrigerator can be reduced.

  In addition, in Table 1, the piping pattern and the number of welding locations of the refrigerator in Embodiment 4 and 5 of this invention are shown. Even if it is except these piping patterns, if it is the structure which can make the occupation space of the piping in a machine room small, the effect similar to the above will be acquired. Furthermore, the same effects as described above can be obtained if the piping material is a material that can reduce the occupied space of the piping in the machine room regardless of copper or iron.

(Embodiment 6)
In the sixth embodiment of the present invention, a case will be described in which the first machine room provided adjacent to the outside of the outer box of the heat insulation box is arranged on the upper surface of the heat insulation box. In the sixth embodiment of the present invention, only differences from the first embodiment of the present invention will be described.

  FIG. 13 is a cross-sectional view of the refrigerator in the sixth embodiment of the present invention. The sixth embodiment of the present invention differs from the second embodiment in that the first machine room 260 is disposed on the upper surface of the heat insulating box.

  In FIG. 13, the left side is the front surface on which a heat insulating door (not shown) that closes the front opening of the refrigerator 160 is openable and the right side is the back surface of the refrigerator 160. In the refrigerator 160 according to the sixth embodiment of the present invention, the first machine room 260 is a space arranged on the upper surface of the heat insulation box, and the condenser in which the iron pipe 500 is formed in a wire shape is provided in the first machine room 260. Is housed in. In addition to the first machine room 260, the second machine room 300 is provided in the lower part of the heat insulation box, and a compressor (not shown) is arranged in the second machine room 300.

  Moreover, in Embodiment 6 of this invention, the air blower 501 is installed in the back (back side) inside the 1st machine room 260. FIG. In addition, vent holes 502 are provided in the front surface and the rear surface of the first machine chamber 260, respectively.

  Thereby, improvement of the heat dissipation capability can be achieved by sucking outside air from the rear of the refrigerator by the blower 501 and forcibly exhausting it toward the front.

  Even with such a configuration, a plurality of machine room spaces are provided, a large work space for welding work can be secured, and welding workability can be improved.

  The present invention can be applied to various types and sizes of household refrigerators, commercial refrigerators, and the like such as refrigerators and refrigeration air conditioners.

Claims (9)

A refrigerator comprising an outer box, an inner box, and a heat insulating box made of a heat insulating material provided between the outer box and the inner box, wherein the iron pipe and the iron pipe are joined to at least a part of the ring-sealed cooling cycle. A pipe having a plurality of joints, a first machine room provided adjacent to the outside of the outer box, and an outer side of the bottom part of the outer box at a position different from the first machine room. A second machine room provided, and the pipe passes through the first machine room and the second machine room, and at least one of the plurality of joints is formed with the first machine room. A refrigerator arranged in the second machine room. The pipe has a first pipe at least partially disposed in the first machine chamber, a second pipe at least partially disposed in the second machine chamber, the first pipe, and the second pipe. The first pipe and the other end of the iron pipe are disposed in the first machine chamber, and the second pipe and the other end of the iron pipe are disposed by welding the first pipe and one end of the iron pipe. The refrigerator according to claim 1, wherein a second joint to be welded together is disposed in the second machine room. 3. The first pipe is a first copper pipe and a second copper pipe made of a copper material, and the second pipe is a third copper pipe and a fourth copper pipe made of a copper material. Refrigerator. 2. A compressor provided in the first machine room, and an evaporating dish provided in the second machine room for storing and evaporating defrost water generated by the cooling cycle. The refrigerator described. The refrigerator according to claim 1, wherein the first machine room is provided on a back surface portion of the heat insulating box. The first joint portion and the second joint portion are respectively disposed in a welding compatible space where the wall of the first machine chamber and the wall of the second machine chamber are not heated by a flame during welding. The refrigerator according to claim 2. The refrigerator according to claim 3, wherein the first copper pipe is a joint pipe that connects the iron pipe and a dryer that removes moisture in the refrigerant of the cooling cycle. 3. The refrigerator according to claim 2, wherein the first joint portion is the first pipe and the iron pipe, and the second joint portion is a horizontal direction in which the second pipe and the iron pipe are abutted. . The iron pipe is at least partially arranged along the inner surface of the outer box, the heat insulating material presses a part of the iron pipe against the outer box, and the heat insulating material is a plate-like member having heat insulating properties. The refrigerator according to claim 1.

Images