JP2016217574A - Automatic ice-making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately attach, to an ice-making chamber, an attachment auxiliary member for installing temperature detection means in the ice-making chamber, and improve work efficiency.SOLUTION: An attachment auxiliary member 48 includes an installation plate 50 connected to a side plate 25 of an ice-making chamber 22 with brazing, and a holder 60 holding a thermistor 80 between itself and the installation plate 50. The side plate 25 has a positioning member 40 at a position where the installation plate 50 is planned to be connected. The installation plate 50 has a second engagement part 54 enabling engagement correspondingly to a first engagement part 40. The second engagement part 54 of the installation plate 50 is engaged to the first engagement part 40 of the side plate 25, and thereby the installation plate 50 can be positioned and fixed to the side plate 25.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automatic ice making machine comprising an ice making chamber to which an evaporation tube is brazed, temperature detecting means for detecting the temperature of the ice making chamber, and an attachment auxiliary member for attaching the temperature detecting means to the ice making chamber. The present invention relates to a structure capable of positioning and fixing the auxiliary mounting member at a required portion of the ice making chamber.

  Automatic ice makers that continuously produce ice blocks are preferably used in coffee shops, restaurants, and other various facilities. This automatic ice making machine includes an ice making chamber for generating ice blocks and a cooling mechanism having an evaporation pipe attached to the outer surface of the ice making chamber. That is, in the ice making operation, ice making water is generated by supplying ice making water to the ice making chamber cooled by the evaporation pipe derived from the cooling mechanism, and in the deicing operation after the ice making operation is completed, the hot gas from the cooling mechanism is generated. Is supplied to the evaporation tube to heat the ice making chamber, and the generated ice block is separated from the ice making chamber.

  In the automatic ice maker, the switching from the ice making operation to the deicing operation when the ice making is completed, and the switching from the deicing operation to the ice making operation due to the detachment of the ice block from the ice making chamber are performed by a thermistor attached to the ice making chamber (temperature detection This is done by transmitting a signal based on the ice making chamber temperature detected in the means) to the control means of the automatic ice making machine. Here, in Patent Document 1, a sensor mounting plate holding a thermistor is fixed to a mounting auxiliary member having an L-shaped cross section fixed to a top plate of an ice making chamber with a screw so that the thermistor is mounted on the ice making chamber. An ice making cooler is disclosed.

Japanese Utility Model Publication No. 4-32468

  The evaporation pipe and the attachment auxiliary member are attached and fixed to the upper surface of the top plate in the ice making chamber by, for example, “brazing” using a brazing material that melts by heating as a bonding agent. As the brazing method, there are a torch brazing method by an operator's manual work, an in-furnace brazing method by a reduction furnace, and the like.

  Here, since the attachment assisting member shown in FIG. 1 of Patent Document 1 is formed in an L-shaped cross section, when performing brazing in the furnace, hold it in a stable posture with respect to the top plate of the ice making chamber. Is difficult. For this reason, attachment of the attachment auxiliary member to the top plate is performed manually by an operator by brazing torches exclusively. However, manual torch brazing is likely to cause a deviation from a fixed position of the mounting auxiliary member set on the top plate during the brazing operation, and is accompanied by troublesome work for correcting the position of the mounting auxiliary member. There is a problem that efficiency decreases.

  In view of the above-mentioned problems inherent in the prior art described above, the present invention can attach the mounting auxiliary member for disposing the temperature detecting means in the ice making chamber at an accurate position with respect to the ice making chamber. An object is to provide an automatic ice making machine that can be improved.

In order to solve the above-mentioned problems and achieve the intended object, the invention according to claim 1 of the present application is a box-shaped ice making comprising a rectangular top plate to which an evaporation tube is attached and side plates surrounding the top plate. An automatic ice maker comprising a chamber, temperature detecting means for detecting the temperature of the ice making chamber, and an attachment auxiliary member for attaching the temperature detecting means to the ice making chamber,
The attachment auxiliary member comprises a mounting plate that is attached to the side plate of the ice making chamber, and a holder that sandwiches the temperature detecting means between the mounting plate,
The side plate has a first engaging portion at a position where the mounting plate is to be attached, and the mounting plate has a second engaging portion that can be engaged with the first engaging portion of the side plate. Have
The gist is that the second engaging portion of the mounting plate is engaged with the first engaging portion of the side plate, and the mounting plate is positioned and fixed to the side plate.
According to the first aspect of the present invention, the first engagement portion provided on the side plate of the ice making chamber is provided with the second engagement provided on the mounting plate forming a part of the auxiliary mounting member for attaching the temperature detecting means to the ice making chamber. By engaging the parts, the mounting plate can be appropriately positioned with respect to the side plate. Thereby, the mounting plate can be accurately attached to a predetermined position where the mounting plate on the side plate is to be joined. In addition, when the mounting plate is attached to the side plate of the ice making chamber, the mounting plate is not displaced with respect to the side plate, so that a troublesome operation for correcting the position of the mounting plate is not required, and work efficiency is reduced. Can prevent.

The gist of the invention according to claim 2 is that the mounting plate is joined to the side plate over the entire outer periphery of the region in contact with the side plate.
According to the second aspect of the present invention, since the mounting plate is joined to the side plate over the entire outer periphery of the region where the mounting plate and the side plate are in contact with each other, ice making water is provided between the mounting plate and the side plate. The contact state between the side plate and the mounting plate can be maintained without entering and freezing. As a result, the heat exchange between the side plate and the mounting plate is performed smoothly and appropriately, the temperature detection means can accurately detect the ice making chamber temperature, and switching between the ice making operation and the deicing operation based on the ice making temperature is properly performed. It can be carried out. Moreover, it can prevent that the chemical | medical solution etc. which are used for the surface treatment of an ice making chamber enter between a mounting board and a side board and remain.

The gist of the present invention described in claim 3 is that the first engaging portion is an uneven portion formed by subjecting the side plate to plastic working.
According to the third aspect of the present invention, the first engaging portion, which is a concavo-convex portion, is formed on the outer surface of the side plate by subjecting the side plate to plastic working, so that the inner surface of the side plate is not deformed into an undulation. Therefore, the ice blocks generated in the ice making chamber in contact with the side plate can be smoothly detached from the ice making chamber, and it can be prevented that the time for the deicing operation is lengthened.

The gist of the invention described in claim 4 is that the evaporator tube can be attached to the ice making chamber while the mounting plate is positioned and fixed to the side plate.
According to the invention which concerns on Claim 4, it is possible to attach an evaporation pipe and a mounting board with respect to an ice making chamber in the same process. Therefore, the working efficiency can be improved as compared with the case where the evaporation pipe and the mounting plate are attached to the ice making chamber in separate steps.

  According to the automatic ice making machine of the present invention, the attachment auxiliary member for disposing the temperature detecting means in the ice making chamber can be attached to the ice making chamber at an accurate position, and the working efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a positioning structure of a side plate of an ice making chamber and a mounting auxiliary member joined to the side plate according to a preferred embodiment of the present invention, wherein (a) is a mounting plate and an ice making unit constituting the mounting auxiliary member. FIG. 4B shows a state in which the mounting plate brazed to the side plate of the ice making chamber and the holder and thermistor of the mounting auxiliary member are separated from each other. It is a vertical front view which shows the automatic ice maker which attached the thermistor to the ice making room by the attachment auxiliary member of the Example in the state which partially fractured the ice making room and tilted the water tray. It is the A section enlarged view of FIG. It is a whole perspective view which shows the state which joined the mounting plate of the attachment auxiliary member to the side plate of the ice making chamber. (a) is a partial plan view of an ice making chamber in which a mounting plate for a mounting auxiliary member is joined to a side plate, and (b) is a right side view of the ice making chamber in which a mounting plate for a mounting auxiliary member is joined to a side plate. (a) is a front view of the mounting plate in the attachment assisting member, and (b) is a right side plate view of the mounting plate. It is the X1-X1 sectional view taken on the line of Fig.1 (a), Comprising: The cross-sectional shape of the 1st engaging part provided in the side plate is shown. It is a schematic block diagram of the shaping | molding apparatus which shape | molds a 1st engaging part on the outer surface of the side plate of an ice making chamber. It is explanatory drawing which shows the process of shape | molding a 1st engaging part on the outer surface of the side plate of an ice making chamber by the shaping | molding apparatus shown in FIG. 8, Comprising: (a) is die head with respect to the right side plate part set to the die | dye of a shaping | molding apparatus. (B) shows a state in which the ejector chip is pressed against the outer surface of the right side plate portion sandwiched between the die and the die head, and the first engaging portion is formed on the outer surface of the right side plate portion. c) shows a state in which the die head is moved away from the die after the first engaging portion is formed.

  Next, an automatic ice making machine according to the present invention will be described below with reference to the accompanying drawings by giving a preferred embodiment. In the embodiment, an ice making chamber provided in an injection type automatic ice making machine will be exemplified, and a mounting auxiliary member for attaching temperature detecting means to the ice making chamber will be described. In the embodiment, unless otherwise specified, the left-right direction in FIG. 2 is the left-right direction of the automatic ice maker 10, the direction perpendicular to the left-right direction is the front-back direction of the automatic ice maker 10, and FIG. The vertical direction is the vertical direction of the automatic ice making machine 10, and the front side of FIG. 2 is the front side of the automatic ice making machine 10.

(Outline of automatic ice making machine 10)
As shown in FIG. 2, the automatic ice making machine 10 of the embodiment includes a heat insulating box 12 formed in a rectangular shape. A mechanism chamber 14 in which an ice making mechanism 20 for forming ice blocks is disposed is defined in the upper part of the heat insulating box 12 and ice making is made in the lower part of the heat insulating box 12 (below the mechanism chamber 14). An ice storage chamber 16 for temporarily storing ice blocks formed by the mechanism 20 is defined. A pair of mechanism frames 18 that support the ice making mechanism 20 are disposed above the inside of the heat insulating box 12 so as to extend horizontally in the left-right direction.

  The ice making mechanism 20 includes an ice making chamber 22 in which a plurality of ice making chambers 28 opened downward are defined (see FIG. 4), and a water tray 32 disposed immediately below the ice making chamber 22. The water tray 32 is pivotally supported by a support shaft 33 so as to be tiltable with respect to the mechanism frame 18 and integrally includes an ice making water tank 34 for storing ice making water. The water tray 32 is provided with a circulation pump 31, and the ice making water stored in the ice making water tank 34 is driven by the circulation pump 31 through the small holes (not shown) of the water tray 32. It is designed to be injected and supplied. The water tray 32 and the ice making water tank 34 are held in parallel with the ice making chamber 22 and close each ice making chamber 28 during the ice making operation. Further, during the deicing operation, the water tray 32 and the ice making water tank 34 are tilted to the right lowering posture about the support shaft 33 by the water tray tilting mechanism 35 to open each ice making chamber 28.

(About ice making chamber 22)
As shown in FIGS. 2 to 5, the ice making chamber 22 is fixed to the mechanism frame 18, 18 via spacers 19, 19, and has a rectangular top plate 24 disposed horizontally in the mechanism chamber 14. And a side plate 25 extending downward from the outer edge of the top plate 24 and surrounding the top plate 24. The ice making chamber 22 includes a plurality of partition plates 26 arranged in a lattice shape on the inner side surrounded by the top plate 24 and the side plates 25. That is, the ice making chamber 22 is configured as a rectangular box having a longitudinal direction in the left-right direction, and extends in the front-rear direction and is disposed in the left-right direction at required intervals (five in the embodiment) first partition plates. 26a, and a plurality of (two in the embodiment) second partition plates 26b that extend in the left-right direction and are disposed at required intervals in the front-rear direction. As a result, the ice making chamber 22 is formed in a state in which a plurality of ice making chambers 28 aligned in the left-right direction and the front-rear direction (in the embodiment, six rows in the left-right direction and three rows in the front-rear direction, total 18) are opened downward. It is made.

  As shown in FIGS. 4 and 5 (a), the first partition plate 26a and the second partition plate 26b are formed with convex portions 30 at both end portions on the long side thereof. It is possible to fit into a recess 29 formed at the lower end. Each convex part 30 is formed in the position adjacent to the lower end of this 1st partition plate 26a and the 2nd partition plate 26b in the both ends of the longitudinal side of the said 1st partition plate 26a and the 2nd partition plate 26b. Each recess 29 opens at the lower end of the side plate 25 and opens at the outer and inner surfaces of the side plate 25. Therefore, each first partition plate 26 a is positioned with respect to the side plate 25 by fitting each projection 30, 30 into the corresponding recess 29, 29 in the side plate 25. In addition, each second partition plate 26 b is positioned with respect to the side plate 25 by fitting each convex portion 30, 30 into the corresponding concave portion 29, 29 in the side plate 25.

  The top plate 24, the side plate 25, and the partition plate 26 constituting the ice making chamber 22 are made of, for example, copper, heat-resistant copper, or the like, and are excellent in thermal conductivity and heat resistance. The abutting portion between the top plate 24 and the partition plate 26, the abutting portion between the top plate 24 and the side plate 25, and the abutting portion between the side plate 25 and the partition plate 26 are brazed and joined without any gap by a brazing material. Yes. The top plate 24 is provided with air holes 24a corresponding to the ice making chambers 28 (see FIGS. 1, 4, and 5). Thereby, when ice blocks are generated in each ice making chamber 28, the air in the ice making chamber 28 can be discharged out of the ice making chamber 22 through the air holes 24a.

(Evaporation tube 38)
As shown in FIGS. 1 to 5, the top plate 24 of the ice making chamber 22 is provided with an evaporation pipe 38 that constitutes a cooling mechanism 36 together with a compressor, a condenser, and an expansion valve (all not shown). ing. The evaporation pipe 38 is formed by bending a pipe material made of, for example, copper, heat-resistant copper or the like into a meandering shape, and is joined to the top plate 24 in contact with the top surface of the top plate 24. The refrigerant cooled by the condenser circulates in the evaporation pipe 38 or hot hot gas pressurized by the compressor is circulated. As a result, when the cooled refrigerant is circulated through the evaporation pipe 38, the ice making chamber 22 is cooled by cooling the evaporation pipe 38, and when hot hot gas is circulated through the evaporation pipe 38. The ice making chamber 22 is heated by heating the evaporation pipe 38. The evaporation pipe 38 is attached to the top plate 24 by brazing and joining the brazing material P that is melted by heating to a predetermined temperature.

(About positioning protrusion 40)
As shown in FIGS. 1, 4, and 5, the side plate 25 of the ice making chamber 22 has a positioning protrusion (first engaging portion) 40 at a position where the mounting plate 50 constituting the attachment auxiliary member 48 is to be joined. have. That is, a plurality (two in the embodiment) of positioning protrusions 40 that protrude outward from the outer surface of the right side plate portion 25a are provided on the outer surface of the right side plate portion 25a of the side plate 25. This positioning protrusion 40 is for positioning the mounting plate 50 prior to joining the mounting plate 50 to a position where the mounting plate 50 is to be joined in the right side plate portion 25a of the side plate 25. Each positioning protrusion 40 is formed at a position spaced apart from the top plate 24 at an equal distance in the vertical direction and at a predetermined interval in the front-rear direction. Each positioning projection 40 is formed by applying plastic working to the outer surface of the right side plate portion 25a using the molding apparatus 70 shown in FIG. 8, as will be described later. As shown in FIG. It is uneven. That is, the positioning protrusion 40 protrudes in a circular shape outward from the outer surface of the right side plate 25a, and a hemispherical recess 41 is formed at the center of the protruding end. Further, a groove 42 surrounding the positioning protrusion 40 is formed around the positioning protrusion 40 in the right side plate portion 25 a of the side plate 25.

(About the auxiliary mounting member 48)
As shown in FIGS. 1, 4, and 5, the ice making chamber 22 of the embodiment is attached with a temperature detecting means 80 for detecting the temperature of the ice making chamber 22 by an attachment auxiliary member 48. The temperature measuring element of the temperature detecting means 80 is selected from a platinum resistance temperature detector, a thermocouple (thermocouple), a thermistor, and the like. In this embodiment, a thermistor is used. The attachment auxiliary member 48 is detachably attached to the mounting plate 50 to be joined to the side plate 25 of the ice making chamber 22, and sandwiches the thermistor 80 as temperature detecting means between the mounting plate 50. Holder 60. Here, the holder 60 is configured to be fixed to the mounting plate 50 by a bolt 65.

  As shown in FIGS. 1, 4 and 5, the mounting plate 50 is joined to a side plate 25 different from the top plate 24 to which the evaporation pipe 38 is joined in the ice making chamber 22. In the embodiment, the mounting plate 50 is attached to the outer surface of the right side plate portion 25a of the side plate 25 by brazing with a brazing material P. That is, the evaporating tube 38 and the mounting plate 50 are attached to the top plate 24 and the side plate 25 facing in different directions in the ice making chamber 22 by brazing. Therefore, as will be described later, the evaporation pipe 38 and the mounting plate 50 can be brazed and joined to the ice making chamber 22 in the same process by the in-furnace brazing method in which brazing is performed in an atmosphere of a reducing furnace. Yes.

  As shown in FIGS. 1 to 6, the mounting plate 50 is a plate-like material that can come into contact with the outer surface of the right side plate portion 25 a in the side plate 25 of the ice making chamber 22. That is, the mounting plate 50 includes a contact plate portion 51 that contacts the outer surface of the right side plate portion 25a, and a mounting plate portion 52 that extends upward from the contact plate portion 51. The mounting plate 50 is made of, for example, copper or heat-resistant copper and has excellent thermal conductivity and heat resistance. When the mounting plate 50 is attached to the right side plate portion 25a of the ice making chamber 22, the mounting plate 50 is in contact with the ice making chamber 22. Efficient heat exchange.

  As shown in FIGS. 1 and 3 to 6, the contact plate portion 51 is formed in a substantially rectangular shape and flat, and the entire rear surface 51 a facing the right plate portion 25 a is formed on the right plate portion 25 a. Surface contact is possible with the outer surface. The contact plate portion 51 is located at a position where the positioning holes 54 and 54 as the second engagement portions engageable with the positioning protrusions 40 and 40 of the right side plate portion 25a of the side plate 25 are removed from the portion where the thermistor 80 contacts. It is formed in a size that can be provided. On the other hand, the mounting plate portion 52 extends upward from the top plate 24 of the ice making chamber 22 when the mounting plate 50 is fixed to the ice making chamber 22. The mounting plate 52 is formed with an insertion hole 53 penetrating the front and back. A bolt 65 for fixing the holder 60 to the mounting plate 50 can be inserted into the insertion hole 53.

(About positioning hole 54)
As shown in FIG. 1 and FIGS. 4 to 6, the mounting plate 50 has a positioning hole (second engagement) with which positioning protrusions 40, 40 provided on the outer surface of the right side plate 25 a of the ice making chamber 22 can be engaged. Joint portion) 54, 54. Each positioning hole portion 54 is formed in the contact plate portion 51 of the mounting plate 50. Each positioning hole 54 is formed at an equal distance from the lower edge of the contact plate portion 51 in the up-down direction and at the same interval as the arrangement interval of the positioning protrusions 40 in the front-rear direction. The positioning hole portion 54 is formed in a circular shape in accordance with the outer edge shape of the positioning projection 40 and has an inner diameter that is the same as or slightly larger than the outer diameter of the positioning projection 40. Therefore, by engaging each positioning hole 54 with each positioning protrusion 40, the mounting plate 50 is accurately positioned at a position where the mounting plate 50 is joined to the right side plate 25a of the ice making chamber 22. Thus, the mounting plate 50 can be brazed and joined to the right side plate portion 25a at an appropriate position and posture.

(About the fitting recess 55)
As shown in FIGS. 1 and 4 to 6, a plurality (two in the embodiment) of fitting recesses 55 are formed in the contact plate portion 51 of the mounting plate 50. These fitting concave portions 55 are configured to be fitted to the convex portions 30 of the second partition plate 26 b protruding from the right side plate portion 25 a of the side plate 25 of the ice making chamber 22. Each fitting recess 55 opens to the lower edge of the contact plate portion 51 and opens to the back surface 51 a and the front surface 51 b of the contact plate portion 51. Further, the respective fitting recesses 55 are formed at the same interval as the arrangement interval of the respective second partition plates 26b in the front-rear direction. Thereby, the convex part 30 of each 2nd partition plate 26b fits to each fitting recessed part 55 by engaging each positioning hole part 54 and each positioning protrusion 40. FIG. Therefore, as shown in FIG. 1, each positioning hole 54 and each positioning protrusion 40, 40 are engaged, and each fitting recess 55 and each projection 30 of the second partition plate 26b are fitted. Thus, the mounting plate 50 can be appropriately positioned with respect to the right side plate portion 25a of the ice making chamber 22.

(About the attachment of the mounting plate 50 to the ice making chamber 22)
As shown in FIGS. 1 (b) and 5, the mounting plate 50 has the entire outer periphery of the region where the right plate portion 25 a of the ice making chamber 22 and the mounting plate 50 are in contact with each other by the brazing material P. It is fixed to the ice making chamber 22 while being joined to the portion 25a. In the embodiment, the entire back surface 51 a of the contact plate portion 51 of the mounting plate 50 and the outer surface of the right plate portion 25 a of the ice making chamber 22 are in surface contact. Accordingly, as shown in FIGS. 1B and 5, the entire outer periphery of the contact plate portion 51 is brazed and joined to the outer surface of the ice making chamber 22 by the brazing material P without a gap. Further, the outer edge of the positioning protrusion 40 and the inner edge of the positioning hole 54 that are engaged with each other are brazed and joined by the brazing material P without a gap (FIG. 5B). Accordingly, the ice making water can be prevented from entering between the outer surface of the right side plate portion 25a of the side plate 25 and the back surface 51a of the contact plate portion 51 of the mounting plate 50. That is, ice making water that has entered between the right side plate portion 25a of the side plate 25 and the back surface 51a of the contact plate portion 51 is not frozen, and the right side plate portion 25a and the contact plate portion 51 are not separated. Accordingly, the contact state between the right side plate portion 25a and the mounting plate 50 is maintained in the ice making operation and the deicing operation, and smooth heat exchange between the right side plate portion 25a and the contact plate portion 51 is possible.

  Here, “brazing” will be described. The term “brazing” in the present application means that the brazing material P, which is an alloy having a melting point lower than that of the base material (in the embodiment, the top plate 24 and the evaporation pipe 38, the side plate 25 and the mounting plate 50), is heated and melted. By using P as a bonding agent, the base material is bonded and attached without melting. And in the brazing which this application makes object, the base material is joined using the joining method which joins the base material using the hard solder whose melting point is 450 degreeC or more, and the soft solder whose melting point is less than 450 degreeC Joining method (soldering).

(About thermistor 80)
As shown in FIGS. 1 and 3, the thermistor 80 includes a temperature sensing cylinder 81 provided with a platinum resistance temperature detector whose electrical resistance changes with temperature change, and outward from the side end of the temperature sensing cylinder 81. And a wiring 82 extending to the bottom. The temperature sensing cylinder 81 is configured in an elongated round bar shape. The wiring 58 is connected to the control means (not shown), and the change in the resistance value of the resistance thermometer when the temperature sensing cylinder 81 changes with the temperature change of the ice making chamber 22 is controlled via the wiring 82. Sent to the means. Then, the control means grasps the temperature of the ice making chamber 22 by a predetermined conversion formula based on the resistance value received from the thermistor 80.

(About holder 60)
As shown in FIGS. 1 and 3, the holder 60 constituting the attachment assisting member 48 is formed integrally with a holding portion 61 that holds the thermistor 80 and the holding portion 61, and the mounting plate portion of the mounting plate 50. 52 and a mounting piece 62 that is mounted on the bolt 52 with a bolt 65. The holding portion 61 is formed in a semi-cylindrical shape that can receive and hold the temperature sensing cylinder 81 of the thermistor 80, and opens to the contact plate portion 51 side of the mounting plate 50. The attachment piece 62 is formed in a flat shape that can contact the attachment plate portion 52 of the mounting plate 50, and an insertion hole 63 into which the bolt 65 can be inserted is formed. Then, when the attachment piece 62 is fixed to the attachment plate portion 52 of the attachment plate 50 by the bolt 65 in a state where the holder 61 holds the temperature sensing cylinder 81 of the thermistor 80, the contact plate of the attachment plate 50 is fixed. The temperature sensing cylinder 81 of the thermistor 80 can be brought into contact with the substantially central portion of the portion 51.

  In the ice making machine 10 of the embodiment, in the ice making operation, the cooled refrigerant is supplied to the evaporation pipe 38 of the cooling mechanism 36 to forcibly cool the ice making chamber 22 and the circulation pump 31 disposed in the water tray 32. , Ice making water is supplied to each ice making chamber 28 through a small hole in the water tray 32. Thereby, ice blocks are generated in each ice making chamber 28. On the other hand, in the deicing operation, the supply of ice making water is stopped, hot gas is supplied to the evaporation pipe 38 of the cooling mechanism 36, and the ice making chamber 22 is heated. Thus, the ice blocks generated in each ice making chamber 28 are separated from the ice making chamber 28 and stored in the ice storage chamber 16.

  In addition, the automatic ice making machine 10 according to the embodiment uses the temperature of the ice making chamber 22 (ice making completion temperature) when ice blocks having a predetermined shape are generated in all the ice making chambers 28 in the ice making operation. When the thermistor 80 attached to the ice making chamber 22 sandwiched between 50 and the holder 60 detects, control means (not shown) switches from the ice making operation to the deicing operation. In the deicing operation, when the thermistor 80 detects the temperature of the ice making chamber 22 (deicing completion temperature) when deicing of the ice blocks from all the ice making chambers 28 is completed, the control means performs the deicing operation. To ice making operation. As described above, in the automatic ice making machine 10, various devices such as the ice making mechanism 20 and the cooling mechanism 36 perform predetermined operations based on the temperature of the ice making chamber 22 detected by the thermistor 80.

(About molding device 70)
FIG. 8 schematically shows the configuration of a molding apparatus 70 that molds the positioning protrusion 40 described above on the outer surface of the right side plate portion 25 a of the side plate 25 of the ice making chamber 22. The molding apparatus 70 can form the outer surface positioning protrusion 40 of the right side plate portion 25a by plastic processing the plate-like right side plate portion 25a before assembly in the ice making chamber 22. Further, the molding apparatus 70 can mold the positioning protrusion 40 on the outer surface of the right side plate portion 25a without forming irregularities on the inner surface (the surface facing the ice making chamber 28) of the right side plate portion 25a. ing. That is, the forming apparatus 70 performs plastic working on the right side plate portion 25a so that the inner surface of the right side plate portion 25a is not formed with irregularities, and forms the positioning protrusions 40 that are the uneven portions on the right side plate portion 25a.

  As shown in FIG. 8, the molding apparatus 70 includes a die head 71 including an ejector chip 73 and a die 72 disposed so as to face the die head 71. The die head 71 includes a punch tip 74 that sandwiches the right side plate portion 25a to be processed together with the die 72, and a punch 75 that presses the ejector tip 73 downward. Further, as shown in FIG. 9, the tip (lower end) of the ejector chip 73 is pressed against the right side plate part 25a to be processed, thereby positioning the cross-sectional shape shown in FIG. 7 on the outer surface of the right side plate part 25a. The protrusion 40 is formed in a shape that can be formed. That is, the tip of the ejector tip 73 includes an annular protrusion 76 that protrudes downward in an annular shape, and a spherical protrusion 77 that protrudes downward in a hemispherical shape at the inner center surrounded by the annular protrusion 76. ing. Further, the inner diameter of the annular protrusion 76 is set to be the same as the outer diameter of the positioning protrusion 40, and the relief is opened downward and recessed upward between the annular protrusion 76 and the spherical protrusion 77. Part 78 is defined.

(About the molding method of the positioning protrusion 40 by the molding apparatus 70)
FIG. 9 schematically shows a process of forming the positioning protrusion 40 on the outer surface of the right side plate portion 25a by the forming device 70. First, as shown in FIG. 9A, the right side plate portion 25 a with the outer surface facing upward is set on the upper surface of the die 72 while the die head 71 is moved upward and separated from the die 72. Next, as shown in FIG. 9B, the die head 71 is moved downward, and the punch 75 provided in the die head 71 is sandwiched between the die 72 and the punch tip 74 in the thickness direction. Thus, the tip of the ejector chip 73 is pressed against the outer surface of the right side plate portion 25a. As a result, the outer surface of the right side plate portion 25 a is plastically deformed by the ejector tip 73 in a state where the inner surface of the right side plate portion 25 a is restricted from being deformed by the die 72.

  When the ejector tip 73 is pressed against the right side plate portion 25a, the annular projection 76 and the spherical projection 77 formed at the tip of the ejector tip 73 bite into the right side plate portion 25a. As a result, the portion in which the annular protrusion 76 and the spherical protrusion 77 bite moves toward the escape portion 78 located between the annular protrusion 76 and the spherical protrusion 77 so that the portion protrudes into the escape portion 78. become.

  When the ejector tip 73 moves down to a predetermined position, as shown in FIG. 9C, the die head 71 is moved up, and the ejector tip 73 and the punch tip 74 are separated from the right side plate portion 25a. As a result, a positioning protrusion 40 protruding from the outer surface is formed on the outer surface side of the right side plate portion 25a. A groove 42 is formed around the positioning protrusion 40 by the annular protrusion 76 of the ejector tip 73, and a recess 41 is formed at the tip of the positioning protrusion 40 by the spherical protrusion 77 of the ejector chip 73. Is done.

  In addition, when forming the positioning protrusion 40 by the forming apparatus 70, the right side plate portion 25a may be appropriately heated prior to the work. When the right side plate portion 25a is heated, the right side plate portion 25a is appropriately softened, so that the positioning protrusion 40 can be formed even if the pressure applied by the ejector tip 73 is kept low.

(About brazing in the furnace)
According to the mounting structure of the mounting auxiliary member 48 in the ice making chamber 22 of the embodiment, the evaporating tube 38 is brazed and joined to the top plate 24 of the ice making chamber 22 and the right side plate portion 25a of the side plate 25 of the ice making chamber 22 is mounted. The brazing and joining of the plates 50 can be performed in the same process by the above-described furnace brazing method. That is, first, prior to brazing and joining the ice making chamber 22 and the evaporation pipe 38, the positioning projections 40 provided on the right side plate 25 a of the side plate 25 are engaged with the positioning holes 54 provided on the mounting plate 50. By fitting, the mounting plate 50 is positioned and fixed at a planned joining position of the right side plate portion 25a. If necessary, the contact plate portion 51 is temporarily fixed to the right side plate portion 25a by spot welding or ultrasonic bonding at a position where the thermistor 80 is in contact with the contact plate portion 51 and at a position away from the positioning hole portion 54. You may make it do.

  When the positioning and fixing of the mounting plate 50 with respect to the right side plate portion 25a is completed, the ice making chamber 22 and the evaporation pipe 38 are set in the reduction furnace. Then, the brazing material P is applied to the evaporation pipe 38 and the brazing material P is applied to the entire outer edge of the contact plate portion 51 of the mounting plate 50 positioned and fixed to the side plate 25 (right side plate portion 25a) of the ice making chamber 22. To do. In this state, the evaporating tube 38 is brazed to the top plate 24 by allowing the ice making chamber 22, the evaporating tube 38 and the mounting plate 50 to stay in the atmosphere of the reducing furnace heated to a predetermined temperature for a predetermined time. The entire outer periphery of the contact plate portion 51 of the mounting plate 50 in contact with the outer surface of the right side plate portion 25a is brazed and attached to the right side plate portion 25a. That is, since the mounting plate 50 is positioned and fixed to the side plate 25 of the ice making chamber 22 and the mounting plate 50 is brazed and joined to the side plate 25, the evaporation pipe 38 is brazed and joined to the top plate 24. And the brazing joining of the mounting plate 50 to the right side plate portion 25a of the side plate 25 can be performed in the same process.

  In the automatic ice making machine 10 of the embodiment configured as described above, the mounting plate 50 of the mounting auxiliary member 48 to which the thermistor 80 for detecting the temperature of the ice making chamber 22 is attached is attached to the ceiling where the evaporation pipe 38 is attached in the ice making chamber 22. It was configured to be attached to a side plate 25 different from the plate 24. Thus, prior to brazing and joining the evaporation tube 38 to the top plate 24 by the in-furnace brazing method, the mounting plate 50 is attached to the planned joining position of the right side plate portion 25a of the side plate 25, so that the top plate 24 is attached. It is possible to carry out the brazing and joining of the evaporation tube 38 to and the brazing and joining of the mounting plate 50 to the right side plate portion 25a of the side plate 25 in the same process. Therefore, since it is not necessary to perform a torch brazing operation, an oxide film is not formed on the outer surface of the mounting plate 50 or the ice making chamber 22, so that the quality can be stabilized and the residue of the flux and the oxidation can be improved. It is possible to prevent the work efficiency from being lowered due to the necessity of the film removal work. Further, since the evaporation pipe 38 and the mounting plate 50 can be attached to the ice making chamber 22 in the same process, the working efficiency is higher than the case where the evaporation pipe 38 and the mounting plate 50 are attached to the ice making chamber 22 in a separate process. As a result, the increase in manufacturing cost can be suppressed as the number of work steps decreases.

  Further, in the automatic ice making machine 10 of the embodiment, the entire circumference of the outer edge (outer edge of the contact plate portion 51) of the region where the right side plate portion 25 a of the side plate 25 of the ice making chamber 22 and the contact plate portion 51 of the mounting plate 50 are in contact with each other. The brazing material P was brazed and joined without a gap. Accordingly, it is possible to restrict the ice making water from entering between the right side plate portion 25 a of the ice making chamber 22 and the contact plate portion 51 of the mounting plate 50. Accordingly, the ice making water can be prevented from freezing between the right side plate portion 25a and the contact plate portion 51, and the contact state between the right side plate portion 25a and the contact plate portion 51 is always maintained, and the right side plate portion 25a Heat exchange with the contact plate portion 51 is smoothly and reliably performed. As a result, the temperature of the ice making chamber 22 can be accurately detected by the thermistor 80 in contact with the contact plate portion 51, and switching between the ice making operation and the deicing operation based on the temperature of the ice making chamber 22 can be performed appropriately. Further, the chemical used for the surface treatment and the pretreatment of the surface treatment does not enter and remain between the right side plate portion 25a of the ice making chamber 22 and the contact plate portion 51 of the mounting plate 50. It is possible to prevent the occurrence of defects.

  In the automatic ice making machine 10 according to the embodiment, the positioning protrusion 40 provided at the planned position where the mounting plate 50 in the right side plate portion 25a of the ice making chamber 22 is to be joined and the contact plate portion 51 of the mounting plate 50 are provided. By engaging the positioning hole portion 54, the mounting plate 50 can be accurately positioned and fixed with respect to the right side plate portion 25a. Therefore, even an operator who has little brazing work experience can attach the mounting plate 50 to the ice making chamber 22 by accurately brazing and attaching. Then, when the mounting plate 50 is attached to the right side plate portion 25a of the ice making room side plate 25, the mounting plate 50 is not displaced relative to the right side plate portion 25a. Therefore, the position of the mounting plate 50 is corrected. A troublesome work is not required, and a reduction in work efficiency can be prevented.

  Further, the positioning protrusion 40 is an uneven part formed by plastic processing on the outer surface side of the right side plate part 25a, and the inner side of the right side plate part 25a facing the ice making chamber 28 is provided with the positioning protrusion 40. Unevenness associated with formation is not formed. Accordingly, when the ice blocks generated in the ice making chamber 28 defined by the right side plate portion 25a are separated from the ice making chamber 22 in the deicing operation, the ice blocks are smoothly detached without being caught on the inner surface of the right side plate portion 25a. You can do that. Accordingly, it is possible to prevent the time for the deicing operation from being prolonged, and the ice making chamber 22 and the water tray 32 do not bite into the ice block. Does not induce 35 failures.

(Change example)
The automatic ice making machine according to the present invention is not limited to the embodiment exemplified in the embodiment, and various modifications are possible.
(1) The mounting position of the mounting plate of the mounting auxiliary member with respect to the side plate of the ice making chamber is not limited to the right side plate portion of the side plate, but may be the left side plate portion, the front side plate portion, or the rear side plate portion.
(2) The first engagement portion of the side plate is a concave portion that is recessed from the outer surface of the side plate, and the second engagement portion of the mounting plate in the attachment auxiliary member protrudes from the back surface of the mounting plate. It is good also as a protrusion part engageable with an engaging part.
(3) The first engagement portion protruding from the side plate of the ice making chamber is not limited to the cross-sectional shape exemplified in the embodiment, and any shape can be used as long as it can be formed by plastic working with a molding apparatus. May have different cross-sectional shapes.
(4) By dimensioning the first engagement portion of the side plate and the second engagement portion of the mounting plate so as to have a so-called interference fit relationship, the first engagement portion and the second engagement portion are When engaged, the mounting plate can be stably positioned and fixed without easily falling off the side plate. When the dimensions are set as described above, prior to attaching the mounting plate to the side plate, the work of spot welding or ultrasonic bonding the side plate and the mounting plate may be unnecessary.
(5) The shape of the mounting plate of the mounting auxiliary member is not limited to the rectangular shape exemplified in the embodiment, and may be a circular shape, an elliptical shape, or a polygonal shape as long as it has a surface that can come into surface contact with the outer surface of the side plate. Etc. In addition, the shape of the holder of the auxiliary mounting member is not limited to the shape illustrated in the embodiment as long as it can be easily attached to the mounting plate and can hold the temperature detecting means appropriately with the mounting plate. .
(6) The attachment of the evaporating tube to the top plate of the ice making chamber and the attachment of the mounting plate to the side plate are not limited to the brazing joints exemplified in the embodiment, but may be carried out by welding or ultrasonic joining, or by other attachment means. You may make it attach.

22 Ice making chamber, 24 Top plate 24 Side plate, 38 Evaporating tube, 40 Positioning protrusion (first engaging portion)
48 mounting auxiliary member, 50 mounting plate, 54 positioning hole (second engaging portion), 60 holder 80 thermistor (temperature detecting means)

Claims (4)

A box-shaped ice making chamber (22) comprising a rectangular top plate (24) to which the evaporation pipe (38) is attached and each side plate (25) surrounding the top plate (24), and the temperature of the ice making chamber (22) In an automatic ice maker comprising temperature detecting means (80) for detecting the temperature detecting means (80), and an attachment auxiliary member (48) for attaching the temperature detecting means (80) to the ice making chamber (22),
The mounting auxiliary member (48) sandwiches the mounting plate (50) mounted on the side plate (25) of the ice making chamber (22) and the temperature detecting means (80) between the mounting plate (50). Consisting of a holder (60)
The side plate (25) includes a first engagement portion (40) at a position where the mounting plate (50) is to be attached, and the mounting plate (50) is configured to engage the first engagement of the side plate (25). A second engagement portion (54) that can be engaged with the portion (40),
The mounting plate (50) is positioned on the side plate (25) by engaging the second engaging portion (54) of the mounting plate (50) with the first engaging portion (40) of the side plate (25). An automatic ice maker characterized by being configured to be fixed.   The automatic ice maker according to claim 1, wherein the mounting plate (50) is joined to the side plate (25) over the entire outer periphery of the region in contact with the side plate (25).   The automatic ice making machine according to claim 1 or 2, wherein the first engaging portion (40) is an uneven portion formed by subjecting the side plate (25) to plastic working.   The mounting plate (50) is positioned and fixed on the side plate (25), and the evaporation pipe (38) can be attached to the ice making chamber (22). Automatic ice machine as described.

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