JP6532290B2 - Automatic ice machine - Google Patents

Description

  The present invention relates to an automatic ice making machine comprising an ice making chamber in which evaporation tubes are brazed and joined, a temperature detecting means for detecting the temperature of the ice making chamber, and a mounting assisting 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 mounting support member at a required position of the ice making chamber.

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

  In the automatic ice making machine, the thermistor (temperature detection attached to the ice making chamber) is switched from ice making operation to ice removing operation due to completion of ice making, and switching from ice removing operation to ice making operation by detachment of ice blocks from the ice making chamber. Means for transmitting a signal based on the temperature of the ice making chamber detected to the control means of the automatic ice making machine. Here, in Patent Document 1, the thermistor is attached to the ice making chamber by fixing the sensor attachment plate holding the thermistor to the L-shaped attachment assisting member fixed to the top plate of the ice making chamber with a screw. An ice making cooler is disclosed.

Japanese Utility Model Application Publication No. 4-32468

  The evaporation tube and the mounting support member are attached to and fixed to the upper surface of the top plate in the ice making chamber, for example, by "brazing" using a brazing material melted by heating as a bonding agent. As a brazing method, there are a torch brazing method by a worker's manual operation, a furnace brazing method using a reduction furnace, and the like.

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

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

In order to solve the problems and achieve the intended purpose, the invention according to claim 1 of the present application is:
A box-like ice making chamber comprising a rectangular top plate to which an evaporation tube is attached and side plates surrounding the top plate, a temperature detecting means for detecting the temperature of the ice making chamber, and the temperature detecting means attached to the ice making chamber In an automatic ice making machine provided with a mounting support member,
The mounting support member includes a mounting plate mounted on the side plate of the ice making chamber, and a holder for holding the temperature detection means between the mounting plate and the mounting plate.
The side plate has a first engagement portion at a planned position to which the mounting plate is attached, and the mounting plate is a second engagement portion that can be engaged corresponding to the first engagement portion of the side plate. Have
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 .
The attachment plate may be joined to the side plate over the entire outer periphery of the region in contact with 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 attachment assisting member for attaching the temperature detecting means to the ice making chamber. By engaging the parts, the mounting plate can be properly positioned relative to the side plate. This allows the mounting plate to be accurately mounted at the planned position where the mounting plate in the side plate is to be joined. In addition, since the mounting plate is not displaced with respect to the side plate during the mounting operation of the mounting plate to the side plate of the ice making chamber, a troublesome operation for correcting the position of the mounting plate is not required, and the working efficiency is reduced. Can be prevented. Furthermore, 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, ice water does not enter between the mounting plate and the side plate and freeze it, The contact between the side plate and the mounting plate can be maintained. As a result, heat exchange between the side plate and the mounting plate is smoothly and appropriately performed, and the temperature detection means can accurately detect the temperature of the ice making chamber, and switching between the ice making operation and the deicing operation based on the ice making chamber temperature is properly made. It can be carried out. Moreover, it can also prevent that the chemical | medical solution etc. which are used for the surface treatment of an ice making room entrap and remain between a mounting board and a side plate.

In the invention according to claim 2 of the present application, the first engaging portion is a concavo-convex portion formed by subjecting the side plate to plastic processing.
According to the invention of claim 2 , the side plate is plastic-worked to form the first engaging portion which is the uneven portion on the outer surface of the side plate, so the inner surface of the side plate is not deformed into the unevenness. Therefore, the ice block produced | generated by the icemaker in the state which contacted the side plate comes to detach | leave from this icemaker smoothly, and it can prevent that the time of a deicing operation | movement becomes long.

The invention according to claim 3 of the present application is characterized in that the evaporation 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 3 , it is possible to perform attachment of the evaporation pipe | tube and mounting plate with respect to an ice making room at 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 according to the present invention, the mounting assisting member for arranging 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.

It is a perspective view showing the side plate of the ice room according to the preferred embodiment of the present invention, and the positioning structure of the attachment assistant member joined to the side plate, wherein (a) is a mounting plate and ice making member constituting the attachment assistant (B) shows a state in which the mounting plate brazed to the side plate of the ice making chamber and the holder of the mounting support member and the thermistor are separated. It is a longitudinal cross-sectional front view which shows the automatic ice making machine which attached the thermistor to the ice making chamber by the mounting assistance member of the Example in the state which cut a part of the ice making room and inclined a 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 board of the attachment auxiliary member to the side plate of the icemaker. (a) is a partial plan view of the ice making chamber in which the mounting plate of the mounting support member is joined to the side plate, and (b) is a right side view of the ice making chamber in which the mounting plate of the mounting support member is joined to the side plate. (a) is a front view of the mounting board in a mounting assistance member, (b) is a right side board figure of a mounting board. It is the X1-X1 line sectional view of Drawing 1 (a), and shows the section shape of the 1st engaging part provided in the side plate. It is a schematic block diagram of the shaping | molding apparatus which shape | molds a 1st engaging part in the outer surface of the side plate of an icemaker. 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 room by the shaping | molding apparatus shown in FIG. 8, Comprising: (a) is a die head with respect to the right side plate part set to the die 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 part held between the die and the die head, and the first engaging part is formed on the outer side of the right side plate ((b) c) shows a state in which the die head is moved away from the die after the formation of the first engagement portion is completed.

  Next, an automatic ice making machine according to the present invention will be described below by way of preferred embodiments with reference to the accompanying drawings. In the embodiment, an ice making chamber provided in a jet-type automatic ice making machine is exemplified, and a mounting assisting member for attaching a temperature detection means to the ice making chamber will be described. In the embodiment, unless otherwise specified, the left and right direction of FIG. 2 is taken as the left and right direction of the automatic ice making machine 10, and the direction orthogonal to the left and right direction is taken as the front and back direction of the automatic ice making machine 10. 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.

(Overview of Automatic Ice Maker 10)
As shown in FIG. 2, the automatic ice making machine 10 of the embodiment includes a heat insulation box 12 formed in a rectangular shape. A mechanism chamber 14 in which an ice making mechanism 20 for forming an ice block is disposed is defined above the inside of the heat insulation box 12, and ice is formed below the inside of the heat insulation box 12 (below the mechanism room 14). An ice storage chamber 16 is defined which temporarily stores ice masses formed by the mechanism 20. A pair of mechanism part frames 18 supporting the ice making mechanism 20 is disposed above the inside of the heat insulation box 12 in a state of extending horizontally in the left-right direction.

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

(About icemaker 22)
The ice making chamber 22, as shown in FIGS. 2 to 5, is fixed to the mechanism section frames 18, 18 via the spacers 19, 19, and is provided with a rectangular top plate 24 arranged 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. Further, the ice making chamber 22 is provided with a plurality of partition plates 26 arranged in a grid shape inside the top plate 24 and the side plate 25. That is, the ice making chamber 22 is configured in a rectangular box whose longitudinal direction is long, and extends in the longitudinal direction and is provided with a plurality of (five in the embodiment) first partition plates disposed at predetermined intervals in the lateral direction. 26a and a plurality of (two in the embodiment) second partition plates 26b extending in the left-right direction and disposed at required intervals in the front-rear direction. As a result, the ice making chamber 22 is drawn in a state where the plurality of ice making compartments 28 aligned in the left and right direction and the front and back direction (in the embodiment, 6 rows in the left and right direction and 3 rows in the front and back direction, total 18) It is made.

  As shown in FIGS. 4 and 5 (a), the first partition plate 26a and the second partition plate 26b have convex portions 30 formed at both longitudinal end portions, respectively. It can be fitted into a recess 29 formed at the lower end of the. Each convex portion 30 is formed at a position adjacent to the lower end of the first partition plate 26a and the second partition plate 26b at both longitudinal end portions of the first partition plate 26a and the second partition plate 26b. Each recess 29 is open at the lower end of the side plate 25 and is open at the outer surface and the inner surface of the side plate 25. Therefore, each first partition plate 26 a can be positioned with respect to the side plate 25 by fitting the convex portions 30, 30 to the corresponding concave portions 29, 29 in the side plate 25. Further, each second partition plate 26 b can be positioned with respect to the side plate 25 by fitting the convex portions 30, 30 into the corresponding concave portions 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 heat conductivity and heat resistance. Further, the contact portion between the top plate 24 and the partition plate 26, the contact portion between the top plate 24 and the side plate 25, and the contact portion between the side plate 25 and the partition plate 26 are brazed by brazing without any gap. There is. Further, air holes 24a corresponding to the respective ice making compartments 28 are opened in the top plate 24 (see FIGS. 1, 4 and 5). Thus, when an ice block is 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.

(About the evaporation tube 38)
On the top plate 24 of the ice making chamber 22, as shown in FIGS. 1 to 5, an evaporation tube 38 constituting a cooling mechanism 36 together with a compressor, a condenser and an expansion valve (all not shown) is disposed. ing. The evaporation tube 38 is formed by bending a pipe material made of, for example, copper, heat-resistant copper, or the like in a meandering manner, and is joined to the top plate 24 in a state of being in contact with the top surface of the top plate 24. In the evaporation pipe 38, the refrigerant cooled by the condenser is circulated, and a high temperature hot gas pressurized by the compressor is circulated. Thereby, when the cooled refrigerant is circulated to the evaporation pipe 38, the ice making chamber 22 is cooled by cooling the evaporation pipe 38, and when the high temperature hot gas is circulated to the evaporation pipe 38 The ice making chamber 22 is heated by the evaporation tube 38 being heated. The evaporation tube 38 is attached by brazing to the top plate 24 by curing the brazing material P that is melted by heating to a predetermined temperature.

(About the positioning projection 40)
As shown in FIG. 1, FIG. 4 and FIG. 5, the side plate 25 of the ice making chamber 22 is provided with a positioning projection (first engagement portion) 40 at a planned position where the mounting plate 50 constituting the mounting auxiliary member 48 is joined. have. That is, on the outer surface of the right side plate portion 25a of the side plate 25, a plurality of (two in the embodiment) positioning projections 40 are provided which protrude outward beyond the outer surface of the right side plate portion 25a. The positioning projection 40 is for positioning the mounting plate 50 prior to bonding the mounting plate 50 to a position where the mounting plate 50 in the right side plate portion 25a of the side plate 25 is to be bonded. The positioning protrusions 40 are spaced apart from the top plate 24 in the vertical direction at equal distances, and are formed at positions spaced apart from each other in the front-rear direction by a required distance. Each positioning projection 40 is formed by plastic working on the outer surface of the right side plate 25a using the forming device 70 shown in FIG. 8 as described later, as shown in FIG. It is an uneven part. That is, while the positioning protrusion 40 circularly protrudes outward rather than the outer surface of the right side plate part 25a, the hemispherical recessed part 41 is formed in the center of a protrusion end. Further, in the right side plate portion 25 a of the side plate 25, a groove portion 42 surrounding the positioning protrusion 40 is formed around the positioning protrusion 40.

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

  The mounting plate 50 is joined to the side plate 25 different from the top plate 24 to which the evaporation tube 38 is joined in the ice making chamber 22 as shown in FIG. 1, FIG. 4 and FIG. In the embodiment, the mounting plate 50 is attached by brazing to the outer surface of the right side plate portion 25 a of the side plate 25 with the brazing material P. That is, the evaporation tube 38 and the mounting plate 50 are attached by brazing to the top plate 24 and the side plate 25 facing in different directions in the ice making chamber 22. Therefore, as described later, it becomes possible to braze and connect the evaporation tube 38 and the mounting plate 50 to the ice making chamber 22 in the same process by the furnace brazing method in which brazing is performed in the atmosphere of a reduction furnace There is.

  The said mounting plate 50 is a plate-shaped material which can contact the outer surface of the right side plate part 25a in the side plate 25 of the ice making chamber 22, as shown in FIGS. That is, the mounting plate 50 includes a contact plate portion 51 in contact with the outer surface of the right side plate portion 25 a and a mounting plate portion 52 extending upward from the contact plate portion 51. The mounting plate 50 is made of, for example, copper, heat-resistant copper, etc., and is excellent in thermal conductivity and heat resistance, and when attached to the right side plate portion 25 a of the ice making chamber 22, the mounting plate 50 is in contact with the ice making chamber 22. Efficient heat exchange is possible.

  The contact plate 51 is substantially rectangular and flat as shown in FIGS. 1 and 3 to 6, and the entire surface 51a opposite to the right plate 25a corresponds to the right plate 25a. It is possible to make surface contact with the outer surface of. The contact plate portion 51 is a position where the positioning hole portions 54, 54 as the second engaging portions engageable with the positioning protrusions 40, 40 of the right side plate portion 25a of the side plate 25 are out of the portion where the thermistor 80 contacts. It is formed in the size which can be provided. On the other hand, when the mounting plate 50 is fixed to the ice making chamber 22, the mounting plate portion 52 extends upward from the top plate 24 of the ice making chamber 22. And in the attachment plate part 52, the penetration hole 53 penetrated on the front and back is formed. A bolt 65 for fixing the holder 60 to the mounting plate 50 can be inserted into the insertion hole 53.

(About the positioning hole 54)
As shown in FIGS. 1 and 4 to 6, the mounting plate 50 has a positioning hole portion (second engagement portion) engageable with the positioning projections 40 and 40 provided on the outer surface of the right side plate portion 25 a of the ice making chamber 22. Joint portion) 54, 54 is provided. Each positioning hole 54 is formed in the contact plate portion 51 of the mounting plate 50. The positioning holes 54 are spaced equally from the lower edge of the contact plate 51 in the vertical direction, and at the same distance as the spacing between the positioning projections 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 protrusion 40, and is formed in an inner diameter equal to or slightly larger than the outer diameter of the positioning protrusion 40. Therefore, by engaging the positioning holes 54 with the positioning projections 40, the mounting plate 50 is accurately positioned at the planned position where the mounting plate 50 in the right side plate 25a of the ice making chamber 22 is joined. Thus, the mounting plate 50 can be brazed to the right side plate 25a at an appropriate position and posture.

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

(About joining of the mounting plate 50 to the ice making chamber 22)
As shown in FIG. 1 (b) and FIG. 5, the outer periphery of the region where the right side plate portion 25 a of the ice making chamber 22 contacts the mounting plate 50 is brazed with the brazing material P as the mounting plate 50. It is being fixed to this icemaker 22 in the state joined to the part 25a. In the embodiment, the entire surface of the back surface 51a of the contact plate portion 51 of the mounting plate 50 is in surface contact with the outer surface of the right side plate portion 25a of the ice making chamber 22. Therefore, as shown in FIG. 1 (b) and FIG. 5, the entire outer periphery of the contact plate portion 51 is brazed to the outer surface of the ice making chamber 22 by the brazing material P without any gap. Further, the outer edge of the positioning projection 40 engaged with each other and the inner edge of the positioning hole 54 are brazed and joined by the brazing material P without a gap (FIG. 5 (b)). Thereby, it is possible to prevent the ice making water 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, the 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 freezes, and the right side plate portion 25a and the contact plate portion 51 do not separate. Therefore, the contact state between the right side plate 25a and the mounting plate 50 is maintained in the ice making operation and the deicing operation, and a smooth heat exchange is possible between the right side plate 25a and the contact plate 51.

  Here, "brazing" will be described. "Brazing" in the present application refers to heating and melting the brazing material P which is an alloy having a melting point lower than that of the base material (in the example, the top plate 24 and the evaporation tube 38, the side plate 25 and the mounting plate 50). By using P as a bonding agent, it is a method of joining and attaching without melting the base material. Then, in the brazing targeted by the present application, a joining method of joining base materials using a brazing solder having a melting point of 450 ° C. or higher and a joining method using soft solder having a melting point of less than 450 ° C. And a bonding method (soldering).

(About thermistor 80)
As shown in FIGS. 1 and 3, the thermistor 80 has a temperature sensing cylinder 81 internally provided with a platinum temperature measuring resistor whose electric resistance changes with temperature change, and a side end of the temperature sensing cylinder 81. And the wiring 82 extended to the end. The temperature sensing cylinder 81 is configured in an elongated round bar shape. The wire 58 is connected to the control means (not shown) side, and the change in the resistance value of the resistance temperature detector when the temperature of the temperature sensing cylinder 81 changes due to the temperature change of the ice making chamber 22 is controlled via the wire 82 Sent to the means. Then, in the control means, based on the resistance value received from the thermistor 80, the temperature of the ice making room 22 is grasped by a predetermined conversion formula.

(About holder 60)
As shown in FIGS. 1 and 3, the holder 60 constituting the mounting assisting member 48 is integrally formed with the holding portion 61 for holding the thermistor 80 and the holding portion 61, and the mounting plate portion of the mounting plate 50. And a mounting piece 62 attached to the housing 52 by bolts 65. The holding portion 61 is formed in a semicircular shape capable of accommodating and holding the temperature sensitive cylinder 81 of the thermistor 80, and is open on the side of the contact plate portion 51 of the mounting plate 50. Further, the mounting piece portion 62 is formed flat so as to be able to contact the mounting plate portion 52 of the mounting plate 50, and an insertion hole 63 through which the bolt 65 can be inserted is formed. The holder 60 fixes the mounting piece 62 to the mounting plate 52 of the mounting plate 50 with the bolt 65 in a state where the temperature sensing cylinder 81 of the thermistor 80 is held by the holding portion 61, the contact plate of the mounting plate 50 The temperature sensitive cylinder 81 of the thermistor 80 can be brought into contact with the substantially central portion of the portion 51.

  In the ice making operation of the automatic ice making machine 10 of the embodiment, 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. The ice making water is supplied to each ice making chamber 28 through the small holes of the water tray 32 by the drive of Thereby, an ice block is generated in each ice making chamber 28. On the other hand, in the deicing operation, the supply of ice making water is stopped, and the hot gas is supplied to the evaporation pipe 38 of the cooling mechanism 36 to heat the ice making chamber 22. Thereby, the ice block generated in each ice making chamber 28 is released from the ice making chamber 28 and stored in the ice storage chamber 16.

  In the ice making operation of the automatic ice making machine 10 of the embodiment, the temperature (ice making completion temperature) of the ice making chamber 22 at the time when ice blocks having a predetermined shape are produced in all ice making small chambers 28. When the thermistor 80 attached to the ice making chamber 22 sandwiching the space 50 and the holder 60 detects it, the 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 (deicing completion temperature) of the ice making chamber 22 when deicing of ice blocks from all the ice making compartments 28 is completed, the control means performs the deicing operation Switch to ice-making operation. As described above, in the automatic ice making machine 10, the control means carries out a predetermined operation based on the temperature of the ice making chamber 22 detected by the thermistor 80 in the various devices of the ice making mechanism 20 and the cooling mechanism 36.

(About the molding apparatus 70)
FIG. 8 schematically shows the structure of a forming apparatus 70 for forming the above-mentioned positioning projection 40 on the outer surface of the right side plate portion 25a of the side plate 25 of the ice making chamber 22. As shown in FIG. The forming device 70 makes it possible to form the outer surface positioning protrusion 40 of the right side plate portion 25 a by plastically processing the plate-like right side plate portion 25 a before assembling in the ice making chamber 22. In addition, the forming apparatus 70 can form the positioning projection 40 on the outer surface of the right side plate 25a without forming irregularities on the inner surface (the surface facing the ice making chamber 28) of the right side plate 25a. ing. That is, the forming apparatus 70 plastically processes the right side plate portion 25a so that the inner surface of the right side plate portion 25a is not uneven, thereby forming the positioning projection 40 as the uneven portion on the right side plate portion 25a.

  As shown in FIG. 8, the forming apparatus 70 includes a die head 71 provided with an ejector chip 73, and a die 72 disposed to face the die head 71. The die head 71 is provided with a punch tip 74 for holding the right side plate portion 25a to be processed together with the die 72, and a punch 75 for pressing the ejector tip 73 downward. Further, as shown in FIG. 9, the front end (lower end) of the ejector tip 73 is pressed against the right side plate 25a to be processed, thereby positioning the sectional shape shown in FIG. 7 on the outer surface of the right side plate 25a. It is formed in the shape which can form the protrusion 40. As shown in FIG. That is, the tip of the ejector tip 73 is provided with an annular projection 76 projecting annularly downward and a spherical projection 77 projecting hemispherically downward at the inner center surrounded by the annular projection 76. ing. The inner diameter of the annular projection 76 is set to be the same as the outer diameter of the positioning projection 40, and it is open downward and recessed upward between the annular projection 76 and the spherical projection 77. Part 78 is defined.

(About the forming method of the positioning protrusion 40 by the forming apparatus 70)
FIG. 9 schematically shows a process of forming the positioning projection 40 on the outer surface of the right side plate 25a by the forming apparatus 70. As shown in FIG. First, as shown in FIG. 9A, the die head 71 is moved upward to be separated from the die 72, and the right side plate 25a whose outer surface is directed upward is set on the upper surface of the die 72. Next, as shown in FIG. 9B, the die head 71 is moved downward to sandwich the right side plate portion 25a in the thickness direction between the die 72 and the punch tip 74, and the punch 75 provided on the die head 71. Thus, the tip of the ejector tip 73 is pressed against the outer surface of the right side plate 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 deformation of the inner surface of the right side plate portion 25 a is restricted by the die 72.

  When the ejector chip 73 is pressed against the right side plate 25a, the annular projection 76 and the spherical projection 77 formed at the tip of the ejector chip 73 bite into the right side plate 25a. As a result, the portion into which the annular projection 76 and the spherical projection 77 bite is moved to the side of the relief portion 78 located between the annular projection 76 and the spherical projection 77 and is pushed out into the escape portion 78. become.

  When the ejector tip 73 moves downward to a predetermined position, the die head 71 is moved upward to separate the ejector tip 73 and the punch tip 74 from the right side plate 25a, as shown in FIG. 9C. Thereby, the positioning protrusion 40 protruded from this outer surface is formed in the outer surface side of the right side plate part 25a. The annular protrusion 76 of the ejector chip 73 forms a groove 42 around the positioning protrusion 40, and the spherical protrusion 77 of the ejector chip 73 forms a recess 41 at the tip of the positioning protrusion 40. Be done.

  When the positioning projection 40 is formed by the forming device 70, the right side plate 25a may be appropriately heated prior to the operation. When the right side plate portion 25 a is heated, the right side plate portion 25 a is appropriately softened, so that the positioning protrusion 40 can be formed even if the pressing force by the ejector chip 73 is suppressed to a low level.

(About furnace brazing work)
According to the mounting structure of the mounting support member 48 in the ice making chamber 22 of the embodiment, the brazing joint of the evaporation tube 38 to the top plate 24 of the ice making chamber 22 and the mounting of the side plate 25 of the ice making chamber 22 to the right side plate portion 25a It is possible to perform the brazing and joining of the plate 50 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 tube 38, the positioning hole portion 54 provided in the mounting plate 50 is engaged with the positioning protrusion 40 provided in the right side plate portion 25 a of the side plate 25. By fitting them together, the mounting plate 50 is positioned and fixed at the planned joining position of the right side plate 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 the planned contact position of the thermistor 80 and the position away from the positioning hole portion 54 in the contact plate portion 51. You may do it.

  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 tube 38 are set in the reduction furnace. Then, the brazing material P is applied to the evaporation tube 38, and the brazing material P is applied to the entire outer periphery 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. Do. In this state, the evaporation tube 38 is brazed and joined to the top plate 24 by allowing the ice making chamber 22, the evaporation tube 38 and the mounting plate 50 to stay in the atmosphere of a reduction 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, which is attached and attached to the outer surface of the right side plate portion 25a, is attached by brazing 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 to the side plate 25, the evaporation pipe 38 is brazed to the top plate 24. It is possible to carry out 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.

  In the automatic ice making machine 10 of the embodiment configured as described above, the mounting plate 50 of the mounting support member 48 to which the thermistor 80 for detecting the temperature of the ice making room 22 is attached It was configured to be attached to the side plate 25 different from the plate 24. Thus, the mounting plate 50 is attached to the planned joining position of the right side plate portion 25 a of the side plate 25 before the evaporation pipe 38 is brazed to the top plate 24 by the furnace brazing method. It is possible to carry out the brazed joining of the evaporation tube 38 to the above and the brazed 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 the torch brazing operation, an oxide film is not formed on the outer surface of the mounting plate 50 or the ice making chamber 22, and the quality can be stabilized, and the residue of the flux and the oxidation It is possible to prevent the removal of the film from becoming unnecessary and lowering the working efficiency. In addition, since the evaporation tube 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 in the case where the evaporation tube 38 and the mounting plate 50 are attached to the ice making chamber 22 in a separate process. Can be suppressed and the increase in manufacturing cost can be suppressed with the decrease in the number of operation steps.

  Further, in the automatic ice making machine 10 of the embodiment, the entire periphery of the outer edge (the outer edge of the contact plate 51) of the area where the right side plate 25a of the side plate 25 of the ice making chamber 22 and the contact plate 51 of the mounting plate 50 are in contact. Were constructed so as to be brazed by the brazing material P without any gap. Thus, the ice making water can be restricted 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. Therefore, 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. Heat exchange with the contact plate portion 51 is performed smoothly and reliably. Thus, 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 appropriately performed. Further, the surface treatment or the chemical solution used for the pretreatment of the surface treatment does not enter between the right side plate portion 25a of the ice making chamber 22 and the contact plate portion 51 of the mounting plate 50 and does not remain there. The occurrence of defects can also be prevented.

  And, in the automatic ice making machine 10 of the embodiment, the positioning projection 40 provided at the planned position where the mounting plate 50 in the right side plate portion 25 a of the ice making chamber 22 is to be joined and the contact plate portion 51 of the mounting plate 50 By engaging with the positioning hole 54, the mounting plate 50 can be accurately positioned and fixed to the right side plate 25a. Therefore, even a worker with little experience in brazing work can exactly attach the mounting plate 50 to the ice making chamber 22 by brazing. Then, the mounting plate 50 is not displaced relative to the right side plate portion 25a when the mounting plate 50 is attached to the right side plate portion 25a of the ice making chamber side plate 25, so the position of the mounting plate 50 is corrected. It is possible to prevent a decrease in work efficiency without requiring troublesome work.

  Further, the positioning projection 40 is an uneven portion formed by plastic working on the outer surface side of the right side plate portion 25a, and on the inner surface side facing the ice making chamber 28 in the right side plate portion 25a, the positioning projection 40 is No unevenness is formed with the formation. Therefore, when the ice block generated in the ice making chamber 28 defined by the right side plate portion 25a is released from the ice making chamber 22 in the deicing operation, the ice block is smoothly released without being caught on the inner surface of the right side plate portion 25a. You can do it. As a result, it is possible to prevent an increase in the time of the deicing operation, and biting of ice blocks by the ice making chamber 22 and the water tray 32 does not occur, and damage to the ice making chamber 22 or the water tray 32 or a water tray tilting mechanism It does not trigger 35 failures.

(Modification example)
The automatic ice making machine according to the present invention is not limited to the embodiment illustrated in the examples, and various modifications are possible.
(1) The mounting position of the mounting plate of the mounting support member 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 engaging portion of the side plate is a concave portion recessed from the outer surface of the side plate, and the second engaging portion of the mounting plate in the mounting auxiliary member is protruded from the back surface of the mounting plate It may be a projecting portion that can be engaged with the engaging portion.
(3) The first engaging portion protruding from the side plate of the ice making chamber is not limited to the cross-sectional shape exemplified in the embodiment, and it is possible to form the plastic working by the forming device. May have different cross-sectional shapes.
(4) The first engaging portion and the second engaging portion are configured by dimensioning the first engaging portion of the side plate and the second engaging portion of the mounting plate so as to have a so-called tight fit relationship. When engaged, the mounting plate can be stably positioned and fixed without easily falling off the side plate. And when dimensioning in this way, prior to attaching a mounting plate to a side plate, the operation | work which carries out spot welding and ultrasonic joining of a side plate and a mounting plate can be made 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 it may be circular, elliptical or polygonal as long as it has a surface capable of surface contact with the outer surface of the side plate. Or the like. Further, the shape of the holder of the mounting assisting member is not limited to the shape exemplified in the embodiment as long as it can be easily attached to the mounting plate and can appropriately hold the temperature detection means with the mounting plate. .
(6) The attachment of the evaporation tube to the top plate of the ice making chamber and the attachment of the attachment plate to the side plate are not limited to the brazed joints exemplified in the embodiments, but may be attached by welding or ultrasonic joining or by other attachment means You may attach it.

22 ice making chamber, 24 top plate 24 side plate, 38 evaporation tube, 40 positioning projection (first engagement portion)
Reference Signs List 48 attachment auxiliary member, 50 mounting plate, 54 positioning hole (second engaging portion), 60 holder 80 thermistor (temperature detection means)

Claims (3)

Box-like ice making chamber (22) comprising a rectangular top plate (24) to which the evaporation tube (38) is attached and side plates (25) surrounding the top plate (24), and the temperature of the ice making chamber (22) An automatic ice making machine comprising: temperature detection means (80) for detecting the temperature; and an attachment assisting member (48) for attaching the temperature detection means (80) to the ice making chamber (22);
The attachment assisting member (48) sandwiches the attachment plate (50) attached to the side plate (25) of the ice making chamber (22) and the temperature detection means (80) between the attachment plate (50). Consisting of a holder (60),
The side plate (25) has a first engaging portion (40) at a planned position where the mounting plate (50) is attached, and the mounting plate (50) is a first engagement of the side plate (25). A second engaging portion (54) engageable corresponding to the portion (40);
The second engaging portion (54) of the mounting plate (50) is engaged with the first engaging portion (40) of the side plate (25) to position the mounting plate (50) on the side plate (25) 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) . It said first engaging portion (40), an automatic ice making machine according to claim 1, wherein an uneven portion formed by performing plastic working on said side plate (25). The automatic ice making machine according to claim 1 or 2 , wherein the evaporation tube (38) can be attached to the ice making chamber (22) with the mounting plate (50) positioned and fixed to the side plate (25).

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