JP4943283B2 - Refrigerator manufacturing method - Google Patents

Description

  The present invention relates to a method for fixing a condenser pipe of a refrigerator to an outer box.

  In the conventional capacitor pipe fixing method, the capacitor pipe is fixed with a resin adhesive when the capacitor pipe is fixed to the outer box. And an aluminum tape is stuck from the top. For this reason, there has been proposed a radiation panel that prevents separation from the outer box due to tent tension of aluminum tape or capacitor pipe deformation (see, for example, Patent Document 1).

Further, an adhesive having good heat conduction is applied in advance to the outer box of the heat insulating box so that the coating thickness is 0.2 mm to 1.5 mm. After that, the condenser pipe is assembled and bonded from above, and then the side wall of the condenser pipe is filled with an adhesive with good heat conduction so that the clearance with the pipe outer box is kept constant and stable heat dissipation performance is obtained. It has been proposed (see, for example, Patent Document 2).
Japanese Utility Model Publication No. 5-19828 JP-A-2-233971

  However, the thing of the said patent document 1 requires two machines, the machine which inject | emits a resin-type adhesive agent to a capacitor | condenser, the machine which affixes an aluminum tape to a capacitor | condenser, and 2 processes generate | occur | produce.

  Moreover, like the said patent document 2, only a resin-type adhesive agent has a bad conductivity compared with an aluminum tape. In addition, the resin adhesive may generate bubbles in the resin adhesive due to temperature change or aging change, and the conductivity may be deteriorated or the appearance (outer box) may be impaired. Furthermore, since the resin adhesive is applied to the entire capacitor pipe, a large amount of material is required and the cost is increased.

  The present invention has been made to solve the above-described problems, and provides a method for manufacturing a refrigerator that can improve the conductivity of a capacitor pipe, reduce the number of devices in the capacitor fixing method, and further reduce the work process. For the purpose.

A method for manufacturing a refrigerator according to the present invention is a method for manufacturing a refrigerator including a heat insulating box having a top surface and both side surfaces formed by an outer plate, and a refrigeration cycle including a condenser formed by a condenser pipe.
Place the condenser pipe on the outer plate before bending,
Bond the capacitor pipe to the outer plate using aluminum tape,
Cross section have a concave cross-section and substantially the same shape of the capacitor pipe, partially in a longitudinal direction is configured to have a predetermined length in the open and longitudinally, to be in close contact with the aluminum tape to the condenser pipe Fix the aluminum tape tightly to the capacitor pipe using the jig
The outer plate in which the capacitor pipe is fixed with aluminum tape is bent into a predetermined shape.

  In the method for manufacturing a refrigerator according to the present invention, the aluminum tape is brought into close contact with the capacitor pipe by using a cylindrical jig partially opened in the longitudinal direction, so that no resin adhesive is required. In addition, heat dissipation to the outer plate of the capacitor pipe is improved.

Embodiment 1 FIG.
1 to 5 show the first embodiment. FIG. 1 is a perspective view of the outer plate 2 to which the capacitor pipes 3a and 3b are attached. FIG. 2 shows a procedure for fixing the capacitor pipes 3a and 3b to the outer plate 2. FIG. The figure shown (a) is a plan view of the outer plate 2, (b) is a plan view in which the capacitor pipes 3a and 3b are arranged on the outer plate 2, and (c) is an aluminum tape 4 attached to the capacitor pipes 3a and 3b. FIG. 3D is a plan view showing a state in which the aluminum tape 4 is brought into close contact with the capacitor pipes 3a and 3b using the jig 1, FIG. 3 is a perspective view of the jig 1, and FIG. FIGS. 5 and 5 are cross-sectional views of the jig 1 fitted into the capacitor pipes 3a and 3b from above the aluminum tape 4. FIG.

  The refrigerator combines a steel plate outer plate, a resin inner box, a steel plate bottom plate and a back plate to form a box with an open front, and this box is filled with a heat insulating material such as urethane. -Form a heat insulation box by foaming. A door is attached to the open front surface of the heat insulation box so that it can be opened and closed.

  The refrigeration cycle used in the refrigerator is composed of a compressor that compresses the refrigerant, a condenser that condenses the high-pressure and high-temperature refrigerant discharged from the compressor (also referred to as a condenser), and a low-pressure and low-temperature Depressurizer (generally using a capillary tube) that depressurizes the gas-liquid two-phase refrigerant, a cooler (also called an evaporator) that generates cold air by exchanging heat between the low-pressure and low-temperature gas-liquid two-phase refrigerant and the internal air Etc.

  The condenser of a refrigerating cycle is arrange | positioned at the side surface and top surface of the inside (insulation material inside) of the outer plate | board which comprises a heat insulation box. It may also be placed inside the back plate on the back.

  In the present embodiment, the condenser of the refrigeration cycle is called a condenser pipe. The capacitor pipe is composed of a pipe (copper pipe). Therefore, regardless of the shape of the capacitor pipe, the cross section perpendicular to the tube axis of each part is substantially circular. Hereinafter, the expression that the cross section of the capacitor pipe is circular means that the cross section perpendicular to the tube axis of each part is substantially circular.

  FIG. 1 is a perspective view of an outer plate 2 to which capacitor pipes 3a and 3b are attached. As will be described later, the capacitor plate 3a, 3b is fixed to the back side (the heat insulating material side) of the outer plate 2 before the outer plate 2 is bent into a U shape.

  In the example shown in FIG. 1, the capacitor pipe is divided into a capacitor pipe 3a and a capacitor pipe 3b. If this is not divided, the capacitor pipe becomes larger. The smaller size is more convenient for transportation. However, this is an example, and it is not necessary to divide it. Any number of divisions may be used. The capacitor pipe 3a is disposed on one side surface and the top surface. The capacitor pipe 3b is disposed on the other side surface. As the refrigerant circuit, the condenser pipe 3a and the condenser pipe 3b are connected in series to constitute a condenser.

  The outer plate 2 to which the capacitor pipe 3a and the capacitor pipe 3b of FIG. 1 are fixed is combined with an inner box, a back plate, and a bottom plate (not shown) to form a box. Since the present embodiment is characterized by the method of fixing the capacitor pipes 3a and 3b to the outer plate 2, the description of the box will be omitted.

  A procedure for fixing the capacitor pipes 3a and 3b to the outer plate 2 will be described with reference to FIG.

  FIG. 2A is a plan view showing a state where the capacitor pipes 3a and 3b are not fixed before the outer plate 2 is bent. The outer plate 2 is punched out by pressing a steel plate, and a flange (not shown) is formed at the edge of the outer plate 2. The dashed-dotted line shown to Fig.2 (a) has shown the position bent in U shape in a post process.

  FIG. 2B is a plan view in which the capacitor pipes 3 a and 3 b are arranged on the outer plate 2. The capacitor pipe 3a is disposed on one side surface and the top surface (when bent into a U-shape) of the outer plate 2. The capacitor pipe 3b is disposed on the other side surface of the outer plate 2 (when bent into a U shape). At this time, the capacitor pipe 3a includes four (side surfaces) or two (top surfaces) pipes (copper tubes) arranged substantially parallel to the longitudinal direction. The capacitor pipe 3b includes four (side) pipes (copper pipes) arranged substantially parallel to the longitudinal direction. The positions of the capacitor pipes 3a and 3b coincide with each other (the position in the vertical direction in FIG. 2B). Although not shown, the capacitor pipes 3a and 3b are temporarily fixed using tape or the like in this state.

  2C shows a state in which the capacitor pipes 3a and 3b are attached to the outer plate 2 with the aluminum tape 4 while maintaining the state of FIG. 2B. As shown in FIG. 2C, the capacitor pipes 3 a and 3 b are attached to the outer plate 2 with the aluminum tape 4. An adhesive is applied to the adhesive surface of the aluminum tape 4. The aluminum tape 4 has, for example, a thickness of 0.5 mm and a width of 50 mm.

  When the capacitor pipes 3a and 3b are attached to the outer plate 2 with the aluminum tape 4, the capacitor pipes 3a and 3b have a circular cross section, which causes a problem that an air layer remains on the side surfaces of the capacitor pipes 3a and 3b. Here, the side surfaces of the condenser pipes 3a and 3b are circular in cross-section in the tube axis direction when the condenser pipes 3a and 3b are placed on the outer plate 2 placed horizontally on a horizontal plane. Say the face.

  Conventionally, in order to solve the problem of leaving an air layer on the side surfaces of the capacitor pipes 3a and 3b, for example, an adhesive having a good thermal conductivity is applied in advance to the outer box of the heat insulating box. Then, the capacitor pipe was assembled and bonded from above, and then the side surface of the capacitor pipe was filled with an adhesive having good heat conduction. However, in this method, since a large amount of adhesive is used, there is a difficulty in manufacturing cost.

  Therefore, in this embodiment, when the capacitor pipes 3a and 3b are attached to the outer plate 2 with the aluminum tape 4, an adhesion method is proposed in which an air layer does not remain on the side surfaces of the capacitor pipes 3a and 3b.

  A jig 1 for bringing the aluminum tape 4 into close contact with the capacitor pipes 3a and 3b and the outer plate 2 as shown in FIGS. The jig 1 is made of hard rubber, for example. The jig 1 has a substantially cylindrical shape having a recess 1a having a cross-sectional shape substantially the same as that of the capacitor pipes 3a and 3b. And the surface fitted by the capacitor pipes 3a and 3b is opening in the longitudinal direction. The length of the jig 1 in the longitudinal direction is several tens of millimeters.

  As shown in FIG. 2D, first, the outer plate 2 on which the capacitor pipes 3a and 3b are bonded with the aluminum tape 4 is placed horizontally on the work surface. Then, the jig 1 (four pieces) is fitted from the top of the aluminum tape 4 to the right ends of the four pipes extending substantially linearly in the longitudinal direction of the capacitor pipe 3 a disposed on one side surface of the outer plate 2. Each jig 1 is set in a machine and automatically operated.

  In this state, as shown in FIG. 5, the aluminum tape 4 is brought into close contact with the capacitor pipe 3a and the outer plate 2 by the jig 1, and there is no air layer on the side surface of the capacitor pipe 3a.

  As indicated by the arrows in FIG. 2D, the four jigs 1 are simultaneously moved from the right end to the left by the machine while maintaining the state where the four jigs 1 are fitted in the capacitor pipe 3a. By this operation, the aluminum tape 4 is in close contact with the four pipes extending in the longitudinal direction of the capacitor pipe 3a.

  When the four jigs 1 come to the left end of the four pipes extending in the longitudinal direction of the capacitor pipe 3a, the machine removes the four jigs 1 from the pipes.

  2D, the uppermost jig (on the paper surface) 1 is fitted into one of the two pipes extending in the longitudinal direction of the capacitor pipe 3a disposed on the top surface of the outer plate 2. In FIG. 2 (d), the jig 1 at the bottom (on the paper surface) is fitted into the other one of the two pipes extending in the longitudinal direction of the capacitor pipe 3 a disposed on the top surface of the outer plate 2.

  The uppermost jig 1 and the lowermost jig 1 (in FIG. 2D) fitted into two pipes extending in the longitudinal direction of the capacitor pipe 3a disposed on the top surface of the outer plate 2 are The aluminum tape 4 is moved to the two pipes from right to left and brought into close contact. During this time, the other two jigs 1 remain in the raised state. Here, “up” refers to an upward direction with respect to the paper surface when the paper surface of FIG. 2D is used as a reference.

  The uppermost jig 1 and the lowermost jig 1 fitted into two pipes extending in the longitudinal direction of the capacitor pipe 3a disposed on the top surface of the outer plate 2 are located at the left ends of the two pipes. When the machine is finished, the uppermost jig 1 and the lowermost jig 1 are removed from the pipe.

  The four jigs 1 further move to the left, and the jigs 1 (four pieces) are placed on the right end of the four pipes extending in the longitudinal direction of the capacitor pipe 3b disposed on the other side surface of the outer plate 2 from above the aluminum tape 4. ) Is inserted.

  The four jigs 1 are simultaneously moved from the right end to the left by the machine while maintaining the state where the four jigs 1 are fitted in the capacitor pipe 3b. By this operation, the aluminum tape 4 is in close contact with the four pipes extending in the longitudinal direction of the capacitor pipe 3b.

  When the four jigs 1 come to the left end of the four pipes extending in the longitudinal direction of the capacitor pipe 3b, the machine removes the four jigs 1 from the pipes. Since the upper two pipes and the lower two pipes have different lengths, the timing for removing the jig 1 is different.

  As described above, since the aluminum tape 4 is brought into close contact with the capacitor pipes 3a, 3b and the outer plate 2 using the jig 1 for bringing the aluminum tape 4 into close contact with the capacitor pipes 3a, 3b and the outer plate 2, the resin system No adhesive is required.

  Since the aluminum tape 4 is in close contact with the capacitor pipes 3a and 3b and the outer plate 2 in a form in which no air layer is present, heat dissipation to the outer plate 2 of the capacitor pipes 3a and 3b is improved.

FIG. 3 is a diagram showing the first embodiment, and is a perspective view of an outer plate 2 to which capacitor pipes 3a and 3b are attached. FIG. 5 is a diagram illustrating the first embodiment, and is a diagram illustrating a procedure for fixing the capacitor pipes 3a and 3b to the outer plate 2 ((a) is a plan view of the outer plate 2, and (b) is a capacitor pipe 3a and 3b to the outer plate 2). (C) is a plan view in which the aluminum tape 4 is attached to the capacitor pipes 3a and 3b, and (d) is a state in which the aluminum tape 4 is brought into close contact with the capacitor pipes 3a and 3b using the jig 1. Plan view). FIG. 3 shows the first embodiment, and is a perspective view of the jig 1. FIG. 3 shows the first embodiment and is a cross-sectional view of the jig 1. FIG. 3 shows the first embodiment, and is a cross-sectional view showing a state in which the jig 1 is fitted onto the capacitor pipes 3a and 3b from above the aluminum tape 4.

Explanation of symbols

  1 jig, 1a recess, 2 outer plate, 3a capacitor pipe, 3b capacitor pipe, 4 aluminum tape.

Claims (3)

In a manufacturing method of a refrigerator comprising a heat insulating box composed of a top surface and both side surfaces by an outer plate, and a refrigeration cycle including a condenser composed of a condenser pipe having a substantially circular cross section perpendicular to the tube axis ,
Place the capacitor pipe on the outer plate before bending,
Adhering the capacitor pipe to the outer plate using aluminum tape,
Cross section has a substantially circular recess of substantially circular cross-section and substantially the same shape of the capacitor pipe, hard rubber jig configured to have a predetermined length portion in the longitudinal direction to open and longitudinally a is the aluminum tape with a hard rubber jig order is brought into close contact with the capacitor pipe, closely fixing the aluminum tape to the condenser pipe,
The capacitor pipe is bent in a predetermined shape with the outer plate fixed by the aluminum tape ,
The opening width of the opening of the hard rubber jig is narrower than the diameter of the capacitor pipe. When the aluminum tape is tightly fixed to the capacitor pipe using the hard rubber jig, the hard rubber jig is used. Widening the opening width of the opening of the tool and fitting it into the capacitor pipe from above the aluminum tape, while maintaining the state where the aluminum tape and the capacitor pipe are fitted into the substantially circular recess of the hard rubber jig A method for manufacturing a refrigerator, wherein the hard rubber jig is moved in the longitudinal direction of the condenser pipe . The hard rubber jig is fitted into a substantially linear portion extending in the longitudinal direction of the capacitor pipe, and the hard pipe is moved in the longitudinal direction to fix the capacitor pipe tightly with the aluminum tape. The manufacturing method of the refrigerator of Claim 1 characterized by the above-mentioned.   3. The method for manufacturing a refrigerator according to claim 1, wherein the condenser pipe is divided and arranged on the outer plate.

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