JP3927301B2 - Adhesive structure and adhering method for cooling unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling unit bonding structure and a bonding method, and more particularly, in a cooling unit such as an auger type ice maker or ice cream manufacturing machine, an improvement in adhesion between a stainless steel refrigeration casing and a copper evaporator, and The present invention relates to an adhesive structure for improving the heat exchange rate and an adhesive method for suitably implementing this adhesive structure.
[0002]
[Prior art]
For example, an auger type ice making machine has a cooling unit formed by winding an evaporator connected to a refrigeration system on the outer periphery of a cylindrical refrigeration casing. In this cooling unit, the refrigerant is circulated in the evaporator to cool the refrigeration casing, the ice making water supplied into the casing is frozen on the inner wall surface, and the resulting ice layer is transferred upward while being scraped off by an auger. The flaky ice is discharged and stored in the ice storage. That is, as shown in FIG. 5, an ice making cylinder 10 serving as an ice making part of an auger type ice making machine is connected to a refrigeration casing 12 that forms a smooth cylindrical inner wall surface and a refrigeration system (not shown), and is connected to the outer periphery of the casing 12. The refrigeration casing 12 is forcibly cooled by circulating a refrigerant through the evaporator 14 during ice making operation. Further, an auger 16 is inserted into the inside of the refrigeration casing 12, and a rotation shaft 18 is rotatably supported by bearings 20 and 20 (only the upper part is shown) disposed at upper and lower ends of the casing 12. . A cutting blade 22 having an outer diameter slightly smaller than the inner diameter of the refrigeration casing 12 is spirally formed on the outer periphery of the auger 16, and thin ice that freezes on the inner wall surface of the refrigeration casing 12 is removed from the auger 16. It is configured to move upward while scraping at 22. A pressing head 24 also serving as the upper bearing 20 is disposed above the refrigeration casing 12, and a cutter 26 is disposed above the pressing head 24. In addition, the outer periphery of the ice making cylinder 10 thus configured is covered with an appropriate heat insulating material 32.
[0003]
When the ice making operation of the auger type ice making machine configured as described above is performed, the refrigeration casing 12 exchanges heat with the refrigerant circulating in the evaporator 14 to be cooled below the freezing point, and is supplied from the supply source 34 to the refrigeration casing 12. Water gradually begins to freeze from the inner wall surface of the casing to form layered thin ice. When the auger 16 inserted in the refrigeration casing 12 is rotationally driven, the thin ice is scraped off by the cutting blade 22 of the auger 16 and transferred upward, and the auger 16 disposed above the refrigeration casing 12 is disposed. It is compressed by the pressing head 24 to form continuous compressed ice. Further, the compressed ice is cut by the cutter 26 to be compressed ice having a predetermined size, pushed out to the ice discharge path 28, and discharged from the ice discharge path 28 into the ice storage 30.
[0004]
[Problems to be solved by the invention]
In the cooling unit typified by the ice making cylinder 10 of the auger type ice making machine described above, in order to uniformly cool the entire freezing casing 12, the entire outer periphery of the casing 12 is formed by the evaporator 14 without any gap as described above. Covering. However, as shown in FIG. 6, the evaporator 14 is formed by spirally winding an annular tube having a flat cross-sectional shape. A gap 42 having a substantially triangular cross section is defined between the winding parts 40 and 40 and the refrigeration casing 12. That is, when the spiral gap 42 is defined on the outer peripheral surface of the refrigeration casing 12, even if the refrigerant is circulated through the evaporator 14 to cool the refrigeration casing 12, the portion where the gap 42 is defined is effective. There is a problem that heat transfer is not performed and the heat exchange rate is lowered as a whole.
[0005]
Therefore, when the evaporator 14 wound around the outer periphery of the refrigeration casing 12 is bonded and fixed with the solder 44 in order to manufacture the ice making cylinder 10 capable of obtaining a uniform heat exchange rate, the gap 42 is formed with the solder 44. A method of filling is being implemented. However, the work of filling the gap 42 with the solder 44 has the disadvantages that it is complicated and time consuming and increases the manufacturing cost. In addition, the solder 44 flows down the outer peripheral surface of the casing 12, so that the entire gap 42 is completely removed. It is generally difficult to fill the space, and as shown in FIG. 6, the space 46 often remains partially. Condensed water tends to accumulate in the remaining space 46, and the condensed water gradually freezes and grows to push up the winding portion 40 of the evaporator 14, and the evaporator 14 is separated from the refrigeration casing 12. There is a serious problem that the evaporator 14 is deformed or damaged.
[0006]
Separately, a member having a good thermal conductivity formed in substantially the same cross-sectional shape (substantially triangular) as the gap 42 is wound along the outer peripheral portion of the refrigeration casing 12 where the gap 42 extends. A method of preventing the gap 42 from being formed by turning is also implemented. However, the manufacturing cost for forming the member into a required cross-sectional shape increases, and it is extremely difficult to wind the member and the evaporator 14 around the refrigeration casing 12 without a gap. It was. Moreover, even if each winding part 40 and 40 of the evaporator 14 and the said member are contact | adhered closely, inflow of condensed water cannot be prevented completely, and the freezing casing 12 by freezing and growth of this condensed water is not possible. It was still impossible to separate the evaporator 14 and the evaporator 14 from being deformed or damaged. When the contact surface between the member and the evaporator 14 is to be bonded with solder, the close contact is rather the result of hindering the inflow of solder, and the evaporator 14 and the evaporator 14 are in contact with each other. Suitable adhesion of the members is difficult.
[0007]
OBJECT OF THE INVENTION
The present invention has been proposed in view of the above-mentioned drawbacks, and has been proposed to solve this problem. A long wire is interposed in advance in a gap defined between the refrigeration casing and the evaporator, and soldering is performed. In this way, the workability related to the adhesion between the casing and the evaporator can be improved, the adhesion between the casing and the evaporator can be improved, and the heat exchange rate can be improved. It is an object of the present invention to provide an adhesion structure and an adhesion method for a cooling unit capable of improving the above.
[0008]
[Means for Solving the Problems]
In order to overcome the above-mentioned problems and achieve the desired purpose suitably, the bonding structure of the cooling unit according to the present invention includes:
An evaporator connected to the refrigeration system is tightly wound around the outer periphery of the cylindrical refrigeration casing in a spiral manner. In the cooling unit in which the spiral gap formed is filled with an appropriate material having good thermal conductivity,
A long wire wound around the outer periphery of the refrigeration casing in a state having a cross-sectional area appropriately smaller than the cross-sectional area of the gap, and forming a required gap in the gap;
The wire rod is poured to fill the entire gap while being transmitted, and is composed of solder that adheres the refrigeration casing and the evaporator in close contact with each other.
[0009]
Similarly, in order to overcome the above-mentioned problems and achieve the desired purpose suitably, the cooling unit bonding method according to the present invention includes:
An evaporator connected to the refrigeration system is tightly wound around the outer periphery of the cylindrical refrigeration casing in a spiral manner. In the cooling unit in which the spiral gap formed is filled with an appropriate material having good thermal conductivity,
A long wire having a cross-sectional area appropriately smaller than the cross-sectional area of the gap is spirally wound around the outer periphery of the refrigeration casing,
The evaporator is spirally wound around the outer periphery of the refrigeration casing so that the wire rod faces the gap formed between the winding portion of the evaporator and the refrigeration casing in a state where a necessary gap is formed,
The molten solder poured from the upper end opening of the gap is injected while being transmitted along the wire, and the solder is filled in the entire gap, thereby adhering the refrigeration casing and the evaporator in close contact with each other. Features.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, the bonding structure and bonding method of the cooling unit according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. In this embodiment, the cooling unit of the auger type ice making machine according to the prior art is exemplified, and its ice making mechanism is the same as the auger type ice making machine shown in FIG. Description is omitted.
[0011]
[First embodiment]
FIG. 1 is a longitudinal sectional view showing a principal part of a cooling unit bonding structure according to a first embodiment of the present invention. In this state, the evaporator 14 is spirally wound. In the spiral gap 42 (see FIG. 2A) defined between the winding portions 40, 40 and the refrigeration casing 12, for example, a copper or aluminum wire having a good thermal conductivity. 50 extends along the gap 42. The wire 50 has a circular cross section having a cross-sectional area that is appropriately smaller than the cross-sectional area of the gap 42, and an appropriate gap 42 </ b> A is provided between the wire 50 and the winding portions 40 and 40 and the refrigeration casing 12. It is defined (refer to FIG. 2B), and the solder 44 is filled in the gap 42A. That is, in the ice making cylinder 10 according to the adhesive structure of the first embodiment, the linear portion 38 in the evaporator 14 is in direct contact with the refrigeration casing 12, and the inward surfaces 40a, 40a of the winding portions 40, 40 are provided. Is bonded to the refrigeration casing 12 through the solder 44 and the wire 50 in an indirect contact state. The solder 44 appropriately flows also between the straight portion 38 of the evaporator 14 and the outer peripheral surface of the refrigeration casing 12, and the straight portion 38 and the casing 12 are directly bonded.
[0012]
Next, a method for bonding the cooling unit according to the first embodiment will be described. As shown in FIG. 2A, the long wire 50 is formed in advance at a pitch interval of the gap 42 that is spirally defined when the evaporator 14 is wound around the refrigeration casing 12. Wind around 12. And the evaporator 14 is wound around the outer periphery of the freezing casing 12 so that the winding part 40 may align with the wire 50 in this state (refer FIG.2 (b)). Alternatively, after the evaporator 14 is wound around the refrigeration casing 12, the wire 50 is pushed in from the upper end opening or the lower end opening of the gap 42, and along the gap 42 extending spirally. You may make it interpose. Furthermore, both the 14, 14 can be wound around the refrigeration casing 12 in a state where the winding start ends of the evaporator 14 and the wire 50 are positioned. In this case, the number of work steps can be reduced.
[0013]
As described above, in the state where the wire 50 is interposed over the entire length of the gap 42, the molten solder 44 is poured from the upper end opening of the gap 42. As a result, the solder 44 flows down along the wire 50 and stays in sequence from the bottom of the gap 42A to solidify. Then, as shown in FIG. 2C, the solder 44 finally fills the entire gap 42A without any problem, and the inward surface 40a of the winding portions 40, 40 of the refrigeration casing 12 and the evaporator 14 is filled. , 40a come into full contact with each other through the solder 44, so that the bonding area between the casing 12 and the evaporator 14 can be maximized, and the bonding force associated therewith can be suitably improved.
[0014]
In the bonding structure of the cooling unit according to the first embodiment configured as described above, when the refrigerant is circulated through the evaporator 14 bonded to the refrigeration casing 12, the evaporator 14 is cooled. The portion of the refrigeration casing 12 that is in direct contact with the straight portion 38 is cooled. Moreover, since the winding parts 40 and 40 of the evaporator 14 are closely adhered to the refrigeration casing 12 via the solder 44, the portion of the refrigeration casing 12 with which the solder 44 contacts is also cooled. That is, since the contact area between the evaporator 14 and the refrigeration casing 12 is also maximized, the heat exchange rate can be maximized, and the refrigeration casing 12 is substantially uniform throughout the portion around which the evaporator 14 is wound. Therefore, the heat exchange rate can be suitably improved.
[0015]
[Second embodiment]
FIG. 3 is a longitudinal sectional view of the main part showing the bonding structure of the cooling unit according to the second embodiment of the present invention. The outer periphery of the refrigeration casing 12 in the ice making cylinder 10 The evaporator 14 is spirally wound in a state where the winding portions 40, 40 are in contact with each other. A gap 42 (see FIG. 4A) defined between the upper and lower winding portions 40 and 40 and the refrigeration casing 12 is made of copper or aluminum having a good thermal conductivity and solder plating 54. A wire rod 52 having an outer surface is applied along the gap 42. The wire 52 has a circular cross-section having a cross-sectional area that is appropriately smaller than the cross-sectional area of the gap 42, and the remaining gap 42 </ b> A defined by the wire 52, the winding portions 40 and 40, and the refrigeration casing 12. (See FIG. 4B), the solder 44 is filled. That is, in the ice making cylinder 10 according to the second embodiment, the linear portion 38 in the evaporator 14 is directly bonded to the refrigeration casing 12 and the winding portions 40, 40 are similar to the first embodiment. The inward surfaces 40 a and 40 a are bonded in a state where they are indirectly in contact with the refrigeration casing 12 through the solder 44 and the wire 52.
[0016]
The method for bonding the cooling unit according to the second embodiment is basically the same as that of the first embodiment. That is, as shown in FIGS. 4 (a) and 4 (b), when the evaporator 14 is wound around the refrigeration casing 12, the wire material 52 is interposed in the gap 42 that spirally extends. Then, molten solder 44 is poured from the upper end opening of the gap 42. As a result, the solder 44 flows down along the wire 52 to which the solder plating 54 is applied, and then stays from the lower portion of the gap 42A and solidifies. Then, as shown in FIG. 4C, the solder 44 finally fills the entire gap 42A without any problem, and the inward surface 40a in the winding portions 40, 40 of the refrigeration casing 12 and the evaporator 14 is filled. 40a can be brought into full contact with each other through the solder 44, and the bonding area between the casing 12 and the evaporator 14 can be maximized, and the bonding force associated therewith can be suitably improved. Moreover, since the wire 52 is plated with solder 54, the molten solder 44 can flow smoothly through the wire 52, and the adhesion between the wire 52 and the evaporator 14 and the refrigeration casing 12 is further enhanced. be able to.
[0017]
In each of the above embodiments, the cooling unit bonding structure and bonding method in the auger type ice making machine shown in FIG. 5 have been described. However, the evaporator connected to the refrigeration system is spirally attached to the outer periphery of the cylindrical refrigeration casing. In addition to this, if it constitutes a cooling unit that is wound around, it can be suitably applied to a cooling unit in an ice cream manufacturing machine, a cold water machine, or the like.
[0018]
【The invention's effect】
As explained above, according to the adhesion structure of the cooling unit according to the present invention, the spiral gap defined between the refrigeration casing and the evaporator is filled with solder. The casing is indirectly bonded with the solder, and the bonding area between the evaporator and the refrigeration casing can be maximized, and the accompanying adhesive force can be preferably improved. In addition, since the contact area between the evaporator and the refrigeration casing is also maximized, the heat exchange rate can be maximized, and the refrigeration casing is cooled substantially uniformly throughout the portion around which the evaporator is wound. There is an advantage that thin ice can be suitably formed on the inner wall surface of the casing.
[0019]
Further, according to the method for adhering a cooling unit according to another invention of the present application, a long wire is interposed in advance in a gap defined between the refrigeration casing and the evaporator, and the molten solder is transmitted to the wire. Therefore, there is an advantage that the solder can be efficiently filled and the workability related to the adhesion between the casing and the evaporator can be improved. Further, it becomes possible to fill the entire gap with the solder, so that the adhesive force between the evaporator and the refrigeration casing can be improved and the heat exchange rate can be improved. And by using the elongate wire rod which gave solder plating, while being able to flow in the molten solder smoothly, it becomes possible to adhere | attach an evaporator and a freezing casing more firmly.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part showing an adhesive structure of a cooling unit according to a first embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the main part showing the method of bonding the cooling unit according to the first embodiment over time.
FIG. 3 is a longitudinal sectional view of a main part showing an adhesion structure of a cooling unit according to a second embodiment of the present invention.
FIG. 4 is an enlarged cross-sectional view of a main part showing a method of bonding a cooling unit according to a second embodiment over time.
FIG. 5 is a vertical side view showing a schematic configuration of an auger type ice making machine in which the present invention is implemented.
FIG. 6 is a longitudinal sectional view of a main part of a conventional cooling unit.
[Explanation of symbols]
12 Refrigeration casing 14 Evaporator 40 Winding part 42 Gap 42A Gap 44 Solder 50, 52 Wire 54 Solder plating

Claims (4)

The evaporator (14) connected to the refrigeration system is tightly wound around the outer periphery of the cylindrical refrigeration casing (12) in a spiral manner, and the winding portions that are closely adjacent to each other in the evaporator (14) are adjacent to each other. In the cooling unit in which the spiral gap (42) defined between (40, 40) and the refrigeration casing (12) is filled with an appropriate material having good thermal conductivity,
The cross-sectional area that is appropriately smaller than the cross-sectional area of the gap (42), and a length wound around the outer periphery of the refrigeration casing (12) in a state where the required gap (42A) is formed in the gap (42). A wire rod (50, 52),
Consists of solder (44) that is poured to fill the entire gap (42A) while conducting the wire (50, 52) and adheres the refrigeration casing (12) and the evaporator (14) in close contact. A cooling unit adhesive structure characterized by that. The adhesion structure of the cooling unit according to claim 1, wherein a solder plating (54) is applied to an outer surface of the wire (52). The cooling unit bonding structure according to claim 1 or 2, wherein the wire (50, 52) is made of copper or aluminum having a good thermal conductivity. The evaporator (14) connected to the refrigeration system is tightly wound around the outer periphery of the cylindrical refrigeration casing (12) in a spiral manner, and the winding portions that are closely adjacent to each other in the evaporator (14) are adjacent to each other. In the cooling unit in which the spiral gap (42) defined between (40, 40) and the refrigeration casing (12) is filled with an appropriate material having good thermal conductivity,
A long wire (50, 52) having a cross-sectional area appropriately smaller than the cross-sectional area of the gap (42), spirally wound around the outer periphery of the refrigeration casing (12),
The evaporator (14) is placed on the outer periphery of the refrigeration casing (12) and in the gap (42) defined between the winding portions (40, 40) of the evaporator (14) and the refrigeration casing (12). The wire (50, 52) is spirally wound so as to face in a state where the required gap (42A) is formed,
The molten solder (44) poured from the upper end opening of the gap (42) is injected while passing through the wire (50, 52) to fill the entire gap (42A) with the solder (44). The method for bonding a cooling unit, characterized in that the refrigeration casing (12) and the evaporator (14) are adhered in a close contact state.

Images