JP2015190707A - Closed cell type automatic ice-making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which, in the case where a code corresponding to each model is set at a sequencer for control of an ice-making machine, when a code is erroneously set, original control cannot be performed, and capacity of the ice-making machine deteriorates.SOLUTION: An ice-making mechanism, which is a model of producing variant ice, includes an ice removal water detection switch energized by an arm of an actuator, and an ice making-mechanism for a standard model which produces square ice does not include the ice removal water detection switch. Therefore, in a flow after the start of the operation of the ice-making machine, a step of confirming whether it is the variant ice model or the standard model, and a step of confirming whether or not the ice removal water detection switch is turned ON are inserted, and self diagnosis is performed during the operation. Thus, the problem has been solved.

Description

  The present invention relates to a control for producing ice cubes in a closed cell type automatic ice making machine in which an ice making mechanism of a standard model for producing ice cubes and an ice making mechanism of a variant ice model for producing deformed ice are selectively mounted. When a command and a control command for manufacturing deformed ice are input and stored in a single sequencer and shared, if a control command corresponding to each of the above specifications is selected by mistake, this is determined and automatic ice making is performed. The operation of the machine is stopped.

  In an automatic ice maker that supplies ice-making water to an ice-making unit cooled below freezing point to produce a large number of ice blocks, (1) many ice-making chambers (cells) that open downwards can be opened and closed by water dishes, Closed cell type that produces ice cubes by spraying ice making water from each water dish to each ice making chamber, and (2) ice making water by supplying ice making water under open conditions to a number of ice making chambers that open downward There is an open cell type that performs. Most of the ice blocks produced by the former closed cell type automatic ice maker are dice-shaped ice cubes, but only by changing the structure of the ice making mechanism, the ice blocks that form spheres and polyhedra other than ice cubes are used. Manufacturing is possible. Accordingly, in this specification, spherical ice other than ice cubes and polyhedral ice are collectively referred to as “deformed ice”. Further, for convenience of explanation, a closed cell type automatic ice maker that manufactures ice cubes is referred to as a “standard model”, and a closed cell type automatic ice maker that manufactures the modified ice type is referred to as a “deformed ice model”.

JP 2003-336947 A Japanese Patent No. 4805307

  As will be described later with reference to FIGS. 3 to 5, the deformed ice model includes a second ice making chamber in addition to the first ice making chamber, and the cooling of the first ice making chamber is continued even during the deicing operation. The operation control of the vehicle must be more complicated than the standard model. For this reason, the control sequencer used for the deformed ice model was prepared separately from the control sequencer used for the standard model. However, the modified ice model and the standard model differ only in the mechanical structure of the ice making mechanism (especially in the ice making chamber), and the structure of the ice making machine and the ice making system mechanical elements are almost common to both. .

For this reason, the ice making machine main body such as a case that can be used in common with both the standard model and the deformed ice model and a refrigeration system such as a compressor are prepared. It is practical to select an ice making mechanism for an ice model (referred to as a second ice making mechanism) as needed and to incorporate it into a housing. In this case, the sequencer built in the control box of the automatic ice making machine is prepared separately for the control of the standard model and for the control of the modified ice model. A corresponding sequencer is selected and incorporated into the automatic ice maker.
However, this means that a dedicated sequencer is required for each of the standard model and the modified ice model. Therefore, (1) For the ice making machine main unit that can be used by selecting the first ice making mechanism (standard model) and the second ice making mechanism (deformed ice model) as described above, (2) to the standard model as before For both the dedicated ice machine for the special ice machine and the special ice machine for the deformed ice model, the sequencer built in the control box has a common single specification, which saves the trouble of manufacturing individually. Cost can be reduced.

  The sequencer that can be shared by the standard model and the modified ice model described above, for example, stores the control steps necessary for the control of the standard model as code A, and stores the control steps necessary for the control of the modified ice model as code B, for example. I'm allowed. Then, the code A or the code B is selected for the sequencer depending on whether the automatic ice maker incorporating the sequencer is a standard model or a modified ice model. For example, in an automatic ice maker for overseas export, the setting items of the sequencer are managed by the model number, and by assigning the model numbers “01” to “99” individually, control steps over several tens of items can be performed at once. It is supposed to be set. As an example, the above-described code A for the standard model is a model number “89 to 99”, and the code B for the deformed ice model is a model number “01 to 88”.

  However, in this case, for example, in the standard model, code A should be selected for the sequencer in assembly at a factory or on-site equipment installation, but code B may be selected by mistake. On the other hand, there is a case where the code A is erroneously selected even though the modified ice model is to select the code B. If an incorrect code is selected for the sequencer in this way, for example, if the ice making machine is operated with the standard model code A set in spite of being a deformed ice model, there is a risk that it will go down due to poor deicing operation. There is sex. Even though it is a standard model, if the code B for a deformed ice model is set, control specific to ice-making operations for deformed ice such as spherical ice will be performed, resulting in a significant decrease in ice making capacity. The difficult point is pointed out.

  In the present invention, when the single sequencer described above is shared between the standard model and the deformed ice model, if a code corresponding to one model is erroneously selected as a code of another model, An object of the present invention is to provide means for detecting an erroneous code selection in the process and stopping the operation of an automatic ice maker. In order to achieve this object, the inventor of the present application, when starting the deicing operation in the ice maker of the deformed ice model, the arm provided in the actuator for tilting the second ice making chamber (water tray) is provided with the removing device provided in the ice making unit. Focusing on turning on the ice water start switch, if the deicing water start switch is turned on despite being a standard automatic ice maker, it is judged that the wrong code has been selected in the sequencer. I tried to do it. Conversely, if the deicing water start switch does not operate in spite of being an irregular ice model automatic ice maker, it is also determined that the wrong code is selected in the sequencer.

In order to solve the above-mentioned problems and achieve the intended purpose, the invention according to claim 1 is a first ice making mechanism as a standard model for manufacturing ice cubes and a first ice model as a deformed ice model for manufacturing deformed ice. In a closed cell type automatic ice making machine capable of selectively mounting either one of two ice making mechanisms,
The second ice making mechanism includes a second actuator that opens and closes the second ice making mechanism and a second arm that is rotated by the second actuator, and the second ice making mechanism is mounted on an automatic ice making machine. , A deicing water start switch for detecting the movement of the second arm and starting the supply of deicing water is also provided,
The first ice making mechanism includes a first actuator that opens and closes the first ice making mechanism, and a first arm that is rotated by the first actuator.
Provided with a single sequencer that inputs and stores control commands unique to the first ice making mechanism and control commands unique to the second ice making mechanism, and the sequencer can select a control command corresponding to the selected mounted model And
When the control command corresponding to the first ice making mechanism is selected and the operation by the sequencer is started, when the deicing water start switch detects the first arm of the first actuator, the control command of the sequencer is Judging that it was selected by mistake, the operation of the automatic ice maker was stopped,
When the control command corresponding to the second ice making mechanism is selected and the operation by the sequencer is started, if the deicing water start switch does not detect the second arm of the second actuator, the control command of the sequencer The gist is to stop the operation of the automatic ice making machine by judging that is selected by mistake.
According to the first aspect of the present invention, when a sequencer programmed for control of a standard model and a sequencer programmed for control of a deformed ice model can be shared by both models, Even if the program code to be handled is selected by mistake, self-diagnosis is performed during operation of the automatic ice maker, and if it is set incorrectly, it is impossible to produce defective ice or add to the equipment by stopping the operation. A load can be prevented.

According to a second aspect of the present invention, the second ice making mechanism is disposed below the first ice making chamber, the first ice making chamber having a number of first ice making chambers opened downward, and the first ice making chamber. The first ice making chamber is provided with a plurality of second ice making chambers that can be closed correspondingly from below, and is held in a closed position for closing the first ice making chamber during the ice making operation, and moves during the deicing operation. A second ice-making chamber that opens
During the ice making operation, ice making water is supplied to the spaces defined in both ice making chambers to form deformed ice, and the second ice making chamber is held in the closed position via the connecting member during the ice making operation. After the ice making is completed, the second arm is driven to rotate the second ice making chamber in the opening direction, and when the deicing water start switch detects the rotation of the second arm at a predetermined angle, The gist of the invention is that the means is opened to start supplying the deicing water to the second ice making chamber to heat the second ice making chamber.
According to the invention of claim 2, the specific configuration of the second ice making mechanism is clarified.

According to a third aspect of the present invention, the first ice making mechanism is provided with an ice making chamber having a number of ice making chambers opened downward, and the ice making chamber is closed below the ice making chamber, and is closed during the ice making operation. And a water dish that opens the ice making chamber during the deicing operation, and a first actuator that moves the water dish so as to be openable and closable with respect to the ice making room.
During ice making operation, ice making water is supplied to the space defined by the ice making chamber and the water tray to form ice cubes, and when the completion of ice making is detected, hot gas is supplied to the ice making chamber and the second actuator is The gist is that it is driven to rotate in the direction of opening the water tray.
According to the invention which concerns on Claim 3, the specific content of a 1st ice making mechanism is clarified.

The gist of the invention described in claim 4 is that the detection of the second arm by the deicing water start switch is performed when the second ice making chamber is opened in the second ice making mechanism.
According to the fourth aspect of the invention, in the second ice making mechanism, the detection operation of the deicing water start switch is performed when the second ice making chamber is opened.

The gist of the invention described in claim 5 is that the detection of the second arm by the deicing water start switch is performed during the closing operation of the second ice making chamber in the second ice making mechanism.
According to the fifth aspect of the invention, contrary to the fourth aspect, in the second ice making mechanism, the detection operation of the deicing water start switch is performed when the second ice making chamber is closed.

  When a control command for manufacturing ice cubes and a control command for manufacturing deformed ice are input and stored in a single sequencer, the appropriate control commands that correspond to the above specifications are the controls for other models. Even if the command is selected by mistake, it can be self-diagnosed during operation to stop the operation of the automatic ice maker.

It is a flowchart figure of the control implemented by the 2nd ice making mechanism which is a deformed ice model. It is a flowchart figure of the control implemented by the 1st ice making mechanism which is a standard model. It is a front longitudinal cross-sectional view of the 2nd ice making mechanism which is a deformed ice model, Comprising: The 2nd ice making chamber has shown the state which closed the 1st ice making chamber from the downward direction. It is a front longitudinal cross-sectional view of the 2nd ice making mechanism, Comprising: The arm provided in the actuator has pressed the deicing water start switch, and has shown the state turned ON. It is a front longitudinal cross-sectional view of the 2nd ice making mechanism which is a deformed ice model, Comprising: The 2nd ice making chamber has moved diagonally downward and has shown the state which opened the 1st ice making chamber entirely. It is a timing chart at the time of driving | operating the automatic ice maker which mounts the 2nd ice making mechanism which concerns on an Example. It is a front view of the 1st ice making mechanism which is a standard model, Comprising: The water tray has shown the state which closed the ice making chamber from the downward direction. It is a front view of the 1st ice making mechanism which is a standard model, Comprising: The water tray moved diagonally downward and the state which opened the ice making chamber completely is shown. FIG. 11 is a flowchart of a control sequence that can shift to a normal operation without immediately setting this state as an error even if a normally open switch and a normally closed switch are incorrectly attached to each other.

  A preferred embodiment of the present invention will be described with reference to the drawings for a closed cell ice making mechanism for a modified ice model and a closed cell ice making mechanism for a standard model to which this embodiment is applied. In the embodiment, a model that manufactures spherical ice will be described as a deformed ice model, but the model is not limited to this, and may be a model that manufactures polyhedral ice called diamond cut, for example.

About 2nd ice making mechanism FIGS. 3-5 is a front view which shows the 2nd ice making mechanism 10 of a closed cell type used for the deformed ice model which manufactures spherical ice. The second ice making mechanism 10 for producing a large number of spherical ices is basically composed of a first ice making chamber 11 arranged horizontally and a second ice making chamber 12 that can be opened and closed from below. It is configured. That is, a rectangular first ice-making chamber 11 made of a metal having a good thermal conductivity is suspended in a horizontal posture on a mounting frame 16 that is horizontally disposed inside the ice making machine casing, and has a hemispherical recess. The first ice making chamber 13 is recessed in the first ice making chamber 11 in a downward direction. Further, on the upper surface of the first ice making chamber 11, an evaporator 14 led out from a refrigeration system composed of a compressor CM, a condenser, a fan motor FM and the like shown in FIG. The heat exchange of the vaporized refrigerant in the evaporator 14 is promoted, and the first ice making chamber 11 is cooled to below the freezing point.

Immediately below the first ice-making chamber 11, the second ice-making chamber 12 is arranged tiltably by the second actuator motor AM ₂ for the material to a satisfactorily thermally conductive metal, during the ice making operation, the first ice-making chamber 11 The first ice making chamber 11 can be opened during the deicing operation. In the second ice making chamber 12, a plurality of second ice making chambers 15, which are also formed as hemispherical concave portions, are formed upward correspondingly to the first ice making chamber 13. When the second ice making chamber 12 is closed from the lower side with respect to the first ice making chamber 11, the ice making chambers 13 and 15 correspond to each other to form a spherical space having a required diameter in each of the small chambers.

  A water pan 17 for injecting and supplying ice making water to each second ice making chamber 15 is integrally fixed to the outer bottom portion of the second ice making chamber 12. A groove 18 is formed between the second ice making chambers 15 adjacent to each other on the surface opposite to the formation surface of the second ice making chamber 15 (the surface facing the water dish 17). A water reservoir 27 is formed between each second ice making chamber 12 and the water tray 17, and the groove 18 faces the water reservoir 27. During the deicing operation, normal temperature tap water supplied through a water supply valve WV serving as a water supply means is accumulated in the water reservoir 27 and is filled between the groove 18 of the second ice making chamber 12 and the surface of the water dish 17. Then, the second ice making chamber 15 is heated.

The water tray 17, as shown in FIG. 5, the mounting frame 16, is pivotally supported to be capable of swiveling tilted by the pivot 19 is rotated together with the second ice-making chamber 12 by a second actuator AM _2. Then, if the water pan 17 is rotated in the clockwise direction, the second ice making chamber 12 is also rotated together with the water tray 17 to open the first ice making chamber 13 as shown in FIG. When moved, the second ice making chamber 12 closes the first ice making chamber 13 as shown in FIG. The water tray 17 has correspondingly formed fountain holes 20 communicating with the respective second ice making chambers 15, and a distribution pipe 21 for supplying ice making water to these fountain holes 20 is disposed on the back surface of the water tray 17. ing. An ice making water tank 22 is integrally provided below the water tray 17, and ice making water is supplied to the distribution pipe 21 through a water supply pump PM attached to the tank 22. That is, the ice making water pumped from the ice making water tank 22 through the water supply pump PM during the ice making operation passes through the fountain holes 20 drilled in the water dish 17 to each of the first ice making chamber 13 and the second ice making chamber 15. And sprayed into the ice formation space defined by The unfrozen water that has not been frozen in the space is made through the return holes 23 that are formed adjacent to the fountain holes 20 of the water tray 17 and communicate with the second ice making chambers 15. Return to the water tank 22.

The second actuator AM ₂ that tilts the water dish 17 together with the second ice making chamber 12 has a second arm 25 as a rotating body extending and fixed to the output shaft 24 in the radial direction, and the tip of the second arm 25 is fixed. A coil spring 26 as a connecting member is elastically interposed between the front end of the water pan 17 and the water dish 17. In the ice making operation, as shown in FIG. 3, the water tray 17 and the second ice making chamber 12 hold the first ice making chamber 11 closed horizontally from below by the elasticity of the coil spring 26. Further, the second arm 25 is provided with a lever piece 25 a that extends in a radial direction with respect to the output shaft 24. Wherein the mounting frame 16, on the movement locus of the second arm 25 and the lever piece 25a, the change-over switch SW ₁ for switching the forward rotation and reverse rotation of the second actuator AM ₂ is disposed. Then, reversing this the lever member 25a biases the switch SW ₁ through the second actuator AM ₂ to rotate (in the direction to open the second ice-making chamber 12) accompanied with no forward direction deicing operation When switched to the side to stop the second actuator AM _2, and is stopped and held in an open position in which tilted the water tray 17 and the second ice-making chamber 12. At this time, the hot gas valve HV of the refrigeration system is switched to supply hot gas to the evaporator 14.

  The first ice making chamber 11 is provided with a temperature sensor Th that functions as a means for detecting completion of ice making and completion of ice removal. As shown in FIG. 6, when the temperature sensor Th detects the preset ice making temperature, the ice making operation is shifted to the deicing operation, and the temperature sensor Th is set in advance. When the completed deicing completion temperature is detected, control for shifting from the deicing operation to the ice making operation is performed.

To the mounting frame 16, the second is disposed the deicing water start switch SW ₂ to the position facing the rotation locus of the arm 25, second arm by accompanying the second operation of the actuator AM ₂ in deicing operation When the arm 25 is rotated by a predetermined angle in the forward rotation direction in which the coil spring 26 is loosened (the direction in which the closing of the second ice making chamber 12 is released), as shown in FIG. SW ₂ is energized and the switch SW ₂ is turned on. As shown in FIG. 6, when the deicing water start switch SW ₂ is turned on, the second actuator AM ₂ is stopped and the water supply valve WV is opened to start supplying deicing water to the water reservoir 27. .

A deicing water end switch SW ₃ for detecting the completion of deicing of the second ice making chamber 12 is arranged on the pivot side of the water tray 17 in the mounting frame 16, and the switch SW ₃ protrudes from the water tray 17. The operation piece 30 is turned on and off. That is, in a state in which during the ice making operation water tray 17 is held in the closed position, as shown in FIG. 3, the operating piece 30 abuts is ON operated deicing water end switch SW _3. Further, the freezing of each second ice making chamber 15 and the ball ice in the second ice making chamber 12 is released, so that the water pan 17 and the second ice making chamber 12 are tilted downward (open position) by their own weight. when the said operating piece 30 is OFF operated at a distance from the deicing water end switch SW _3. When the deicing water end switch SW ₃ is OFF operation as shown in FIG. 6, to stop the supply of the deicing water in closed water supply valve WV of the water supply pipe 29 shown in FIG. 5, the second actuator The operation of AM ₂ is resumed, and the second ice making chamber 12 and the water pan 17 are tilted toward the open position.

  Below the ice making water tank 22, a drain pan 31 is provided for receiving ice making water that has not been frozen and discharging it outside the apparatus. The drain pan 31 is fixed to the shaft 32 above the drain pan 31. The ice guide plate 33 is facing. During the ice making operation, the ice guide plate 33 is positioned at a retracted position so as not to interfere with the water tray 17 and the ice making water tank 22 as shown in FIG. Further, during the deicing operation, the ice guide plate 33 falls on the upper surface of the second ice making chamber 12 in the tilted state (open position), blocks each second ice making chamber 15 as shown in FIG. It functions as a chute that guides the ball ice falling upward to the ice storage.

First Ice Making Mechanism FIGS. 7 and 8 are front views showing a closed cell type first ice making mechanism 40 used in a standard model for making ice cubes. The first ice making mechanism 40 is disposed on the lower surface of the ice making plate 42 arranged in parallel to the horizontal mounting frame 60, and has an ice making chamber 48 having a grid-like ice making chamber 46 opening downward, and the ice making plate 42. An evaporator 50 meanderingly disposed on the upper surface, a water pan 52 disposed below the ice making chamber 48 and tiltable between a closed position for closing the ice making chamber 46 and an open position for opening the ice making chamber 46; The water tray 52 is composed of a water tray tilting mechanism 54 that tilts the water tray 52 up and down. During the ice making operation, the ice making chamber 48 is forcibly cooled by supplying the refrigerant to the evaporator 50 with the ice making chamber 48 closed by the water tray 52. Further, ice making water in an ice making water tank 56 provided integrally with the water tray 52 is jetted and supplied to the ice making small chambers 46 through the water tray 52 by the water supply pump PM, and ice cubes are formed in each ice making small chamber 46. Generated.

The water pan tilting mechanism 54 includes a shaft (not shown) that is pivotally supported by a pair of bearings that are vertically suspended from the lower surface of the mounting frame 60 to which the water pan 52 is mounted in the front-rear direction of the apparatus body. The first arm 62 connected to the front and rear ends of the shaft and extending in the radial direction, and the coil spring for elastically connecting the tip of the first arm 62 and the open end of the water dish 52 64, and a first actuator AM ₁ Metropolitan rotating the shaft in the forward direction and the reverse direction. In the deicing operation, the water tray 52 is tilted downward by the water tray tilting mechanism 54 around the pivot shaft 58 provided at the left end of the water tray 52 to open the ice making chamber 46 and the evaporation. The ice making chamber 48 is heated by the hot gas supplied to the vessel 50 to melt the ice formation surface between the ice making chamber 46 and the ice cube, and the ice cube group is dropped by its own weight.

As described above, the second ice making mechanism 10 needs to supply deicing water to the second ice making chamber 12 in order to dissociate the spherical ice from the second ice making chamber 15 in the second ice making chamber 12 when the deicing operation is started. is there. Therefore, when the second ice making mechanism 10 is incorporated in the ice making machine housing, the deicing water start switch SW ₂ is attached to the mounting frame 16, and the second actuator AM ₂ is connected to the first ice making chamber 11 by the second ice making chamber 12 and when opening and closing the water tray 17, it has a second arm 25 provided to the second actuator AM ₂ to actuate oN · OFF the deicing water start switch SW _2. That case of mounting the second ice-making mechanism 10 in the ice making machine housing, it is necessary to attach the casing together the deicing water start switch SW _2. However, in the first ice-making mechanism 40, there is no need to supply deicing water to the water tray 52 as will be described later, of course not necessary to attach the deicing water start switch SW ₂ upon incorporation of the first ice-making mechanism 40.

(Effects of Example)
As described above, the second ice making mechanism 10 has the second actuator AM ₂ and the second arm 25 for opening and closing the second ice making chamber 12 and the water dish 17 with respect to the first ice making chamber 11, and also the first ice making mechanism. 40 has a first actuator AM ₁ and a first arm 62 for driving the water tray 52 to open and close with respect to the ice making chamber 48. And said deicing start switch SW ₂ only when mounting the second ice-making mechanism 10 as described above to an automatic ice maker, there is also該除ice start switch SW ₂ is attached to the housing, the first When the ice making mechanism 40 is mounted on an automatic ice maker, it is not necessary to attach it.

  As described above, the control sequencer used in this embodiment is a single sequencer that can be shared by both the standard model and the modified ice model. The control steps necessary for controlling the first ice making mechanism 40, which is a standard model, are input and stored as, for example, code A, and the control steps necessary for controlling the second ice making mechanism 10, which is a deformed ice model, are designated as code B. As input. If the ice making mechanism mounted on the ice making machine main body is the first ice making mechanism 40 as a standard model, the code A of the sequencer is selected. If the ice making mechanism mounted on the ice making machine main body is the second ice making mechanism 10 as a deformed ice model, the code B of the sequencer is selected. However, as described above, the sequencer code A or code B may be erroneously selected when the automatic ice making machine is assembled or installed on site.

  Next, the control operation of the embodiment of the present invention will be described with reference to the flowcharts of FIGS. 1 and 2 and the timing chart of the second ice making mechanism 10 of FIG. First, the case where the second ice making mechanism 10 is mounted on a housing of an automatic ice making machine to manufacture deformed ice (here, spherical ice) will be exemplified. In this case, for the single sequencer shared by both the standard model and the modified ice model, the code B storing the control steps of the modified ice model is correctly selected. However, there is no possibility that the code A which is the control step of the standard model is erroneously selected at the assembly stage in the factory or the installation stage in the field such as a kitchen.

  In FIG. 1, when the automatic ice maker is turned on in step S1 to start operation, it is confirmed in step S2 whether or not it is a standard model. If step S2 is affirmed (YES), the process proceeds to the flowchart of the standard model shown in FIG. If step S2 is negative (NO), the process proceeds to step S3 in the flowchart of the modified ice model in FIG. In the closed cell type automatic ice maker, when the operation is started by pressing a button, the deicing operation is started first. This is because it is unclear in which state the machine stops during ice making or deicing when the machine is stopped, such as when power is cut off due to a power failure or when the power is turned off. That is, since the second ice making chamber 12 (water tray 17) is descending with respect to the first ice making chamber 11, or spherical ice may remain in the first ice making chamber 13, there is any state. However, for the time being, de-icing operation is started, de-icing water is supplied, and the second ice making chamber 12 (water tray 17) is tilted and opened so that the ball ice can be discharged, thereby ensuring the safety of the equipment. It is to do.

In FIG. 1, since the ice making operation was executed in the previous process and the ball ice was produced in the first and second ice making chambers 13 and 15, the power was shut off for some reason. It is assumed that the operation is restarted after turning on the power (ON). In step S3 in FIG. 1, drives the second actuator AM ₂ as shown in FIG. 6 in the forward direction together with (ON), rotate the compressor CM to cool the first ice-making chamber 11. Then, a lowering command for opening the second ice making chamber 12 (water tray 17) from the first ice making chamber 11 is issued.

Second actuator AM ₂ is also the start of the normal rotation, the second ice-making chamber 12 is not immediately perform the lowering operation. This is because there is a possibility that spherical ice is formed between the first ice making chamber 11 and the second ice making chamber 12 in the process before resuming operation, and the members 11 and 12 are strongly stuck with ice. It is. That is, in step S3, the second second arm 25 of the actuator AM ₂ is rotated until the state of FIG. 4 from the state of FIG. 3, the ON biasing this by pressing the deicing water start switch SW _2. Accordingly, in step S4, the water supply valve WV in FIG. 6 is opened to supply room-temperature deicing water to the second ice making chamber 12, and the freezing in the second ice making chamber 12 is melted. Since this is at the second ice-making chamber 12 is closed the first ice-making chamber 11, the closing of the deicing water end switch SW ₃ is pressed ON operation to the operating piece 30 (the water tray 17 (See FIG. 3 and FIG. 6).

As shown in FIG. 6, the second actuator AM ₂ is the supply of deicing water by the water supply valve WV is initiated to stop the forward rotation, the deicing water end switch SW ₃ resumes turned OFF the forward. The second actuator AM by forward rotation start of the ₂ second Freezer 12 (water tray 17) initiates the tilting as shown in FIG. 5, the operating piece 30 is deicing water end switch SW water dish 17 in step S5 ₃ disengaged from to OFF operates the switch SW _3. Thereby, the water supply valve WV is closed and the supply of the deicing water to the second ice making chamber 12 is finished. Then the second actuator AM _2, the second lever piece 25a branched from the arm 25 stops normal rotation is switched to the reverse rotation side by biasing the changeover switch SW _1. As a result, the second ice making chamber 12 (water tray 17) stops at the lowest position and fully opens the first ice making chamber 11. At this timing, the hot gas valve HV (FIG. 6) provided in the refrigeration system is opened to supply hot gas to the evaporator 14, and deicing of the first ice making chamber 11 is started in step S6.

Next, in step S7, the temperature sensor Th shown in FIG. 3 and FIG. 6 confirms whether or not the temperature of the first ice making chamber 11 has reached a predetermined deicing completion temperature. 2 actuator AM ₂ is reversed by raising the second Freezer 12 at step S8 (the water tray 17). When the second ice-making chamber 12 (the water tray 17) is cut to rise, the second second arm 25 of the actuator AM ₂ stops reverse rotation is switched to the forward side by biasing the changeover switch SW _1. At this time, as shown in FIG. 5, the second arm 25 rotates clockwise as the second actuator AM < _b > ₂ rotates in the reverse direction, and the second ice making chamber 12 closes the first ice making chamber 11 in the process. As shown in FIG. 6, the arm 25 turns on the deicing water start switch SW < _b > ₂ and supplies ice making water for use in ice making operation from the water supply valve WV to the ice making water tank 22.

The above control sequence is a case where the second ice making mechanism 10 is mounted on the ice making machine casing and the code B corresponding to the second ice making mechanism 10 is correctly selected by the single sequencer. . However, in the sequencer, if the code A corresponding to the first ice-making mechanism 40 is selected by mistake, it controls the "deicing start" the deicing water start switch SW ₂ is energized by the second arm 25 also commands the circuit, the said code a so the deicing start mode by deicing water start switch SW ₂ is not set, results in a problem that the supply of deicing water is not performed to the second ice-making chamber 12. Therefore, in this embodiment, in the flowchart of FIG. 1, by inserting the step S9 after step S8, the deicing water start switch SW ₂ is biased by the second arm 25 so as to check whether the ON operation It has become. That is, in FIG. 1, the process proceeds to step S9 to the next step S8, where checks whether deicing water start switch SW ₂ is turned ON, it if it is affirmative (YES), the selected correct code B The operation proceeds to the normal operation of step S10. If step S9 is negative (NO), however, it is determined that the code A for the first ice making mechanism 40 has been selected by mistake, and the operation of the automatic ice making machine is stopped in step S11.

If it is affirmed (YES) in step S2 that it is a standard model (equipped with the first ice making mechanism 40), the process proceeds to step S12 in the flowchart of FIG. 2 as described above. Water dishes at step S12 52 is driven by the first actuator AM ₁ as shown in FIG. 8 starts tilting of obliquely downward. The water dish lowering limit detecting means (not shown) detects the lowering limit of the water tray 52, first actuator AM ₁ in step S13 water tray 52 to stop the forward rotation is stopped at the fully open state. Next, in step S14, the hot gas valve (not shown) of the refrigeration system is opened, hot gas is supplied to the evaporation pipe 50, and the ice making chamber 48 is heated. Thereafter, a temperature sensor (not shown) provided in the ice making chamber 48 in step S15 confirms whether or not the temperature of the ice making chamber 48 has reached the deicing completion temperature. S16 proceeds to reverses the first actuator AM ₁ and starts to rise in the water dish 52.

The above control sequence is a case where the first ice making mechanism 40 is mounted on the ice making machine casing and the code A corresponding to the first ice making mechanism 40 is correctly selected by the single sequencer. However, if the code B corresponding to the second ice making mechanism 10 is selected by mistake in the sequencer instead of the code A, the operation of the automatic ice making machine is controlled in the wrong sequence, resulting in inconvenience. That's right. Therefore, in the flowchart of FIG. 2, by inserting the step S17 after step S16, the deicing water start switch SW ₂ is adapted to be urged to check whether the ON operation. That query whether deicing water start switch SW ₂ at step S17 has been activated ON, if the result is negative (NO), the process as the correct code A is selected, and continues the normal operation in the next step S18. However, if the result in step S17 is affirmative (YES), the first ice-making mechanism 40 despite not equipped with a deicing water start switch SW _2, because it is inappropriate became ON operation Then, it is diagnosed that the code B directed to the second ice making mechanism 10 is erroneously selected, and the operation of the automatic ice making machine is stopped in step S19.

In the flowchart of FIG. 1, the flow from step S3 to S9 relates to the deicing operation. From step S10 onward, when the temperature sensor Th detects that the temperature of the first ice making chamber 11 has exceeded the deicing completion temperature, cycle control for repeating the ice making operation and the deicing operation in the deformed ice model. Migrate to
Similarly, in the flowchart of FIG. 2, the flow from step S12 to S17 relates to the deicing operation. After step S18, when the temperature sensor Th detects that the temperature of the first ice making chamber 11 has exceeded the deicing completion temperature, the cycle control for repeating the ice making operation and the deicing operation in the standard model is performed. Transition.

[Incorrect mounting of switches SW ₂ and SW ₃ ]
In the second ice-making mechanism 10, as described above with respect to FIG. 3, deicing water end switch SW ₃ and deicing water start switch SW ₂ Togaotto s are used. The former deicing water start switch SW ₂ detects (contacts) the second arm 25 of the second actuator AM ₂ and turns on to start supplying deicing water to the second ice making chamber 12. It is a normally closed micro switch. The latter deicing water end switch SW _3, the second ice-making chamber 12 when opened, the contact by the operating piece 30 provided in the second ice-making chamber 12 is released to OFF operation with respect to the first ice-making chamber 11 The deicing water supply is terminated, specifically, a normally open type micro switch. The deicing water end switch SW ₃ also functions as a descending detection unit and an ascending detection unit of the second ice making chamber 12 (water dish 17) with respect to the first ice making chamber 11.

As described above, the two switches SW ₂ and SW ₃ are micro switches having the same shape as the switch contacts, but only have a mechanism difference depending on whether the switch contact type is a normally closed type or a normally open type. . For this reason, in the manufacturing site, there is a case where the normally open type switch is erroneously used where the normally closed type switch should be used, and vice versa. In this case, since the contact types of the _two switches SW ₂ and SW ₃ are reversed, the ice making machine does not operate correctly. For example, the case where the installation of the _two switches SW ₂ and SW ₃ is mistaken in the second ice making mechanism 10 will be described. Power starts and deicing backup timer counts put, second actuator AM ₂ second Freezer 12 rotating forward starts descending. When the second ice-making chamber 12 is lowered to a predetermined position, deicing water start switch SW ₂ of the normally closed type to supply the deicing water actuated ON. Deicing water end switch SW ₃ of the time normally open remains still ON as shown in FIG. However, if the two switches SW ₂ and SW ₃ are mistakenly installed, the deicing water end switch SW ₃ (which also serves as a descending detection means for the second ice making chamber 12) that should be normally open is normally closed. Since the second ice making chamber 12 is lowered, the second ice making chamber 12 is turned on. As a result, the deicing backup timer is timed up, and the operation of the ice making machine is stopped due to an error.

Therefore, even if the deicing water start switch SW ₂ and the deicing water end switch SW ₃ are installed in reverse, the sequencer performs self-diagnosis with the sequencer to determine whether the switches SW ₂ and SW ₃ are electrically operated. It is proposed to replace it automatically. That reversed the second actuator AM ₂ Turn, the rise of the second ice-making chamber 12 (the water tray 17) starts, the second actuator AM ₂ stops the reverse rotation to be detected rising limit. At this time, the state of the _two switches SW ₂ and SW ₃ attached to the ice making machine casing is electrically confirmed by the sequencer. The switch contact OFF the switch of the person who has become (closed) is recognized as deicing water start switch SW ₂ of the normally closed, also switch contact ON the switch of the person who has become (open) normally open Deicing water end switch SW ₃ (which also serves as the detecting means of the second ice making chamber 12) is recognized. As shown in FIG. 3, when the second ice making chamber 12 (water pan 17) is fully raised and the first ice making chamber 11 is completely closed, the second ice making chamber is arranged due to the arrangement of both switches. deicing water end switch SW _3, which also serves as the increase in detection of 12 is always turned oN operation.

An example of a control sequence for dealing with an incorrect mounting of both switches SW ₂ and SW ₃ whose contact open / close states are reversed will be described with reference to the flowchart of FIG. In step S1, the ice maker is turned on to start operation. Accordingly, the second actuator AM ₂ is reversed to raise the second Freezer 12 in step S2. When the second ice making chamber 12 completes the ascent, whether or not the switch SW ₂ attached to the ice making machine casing (whether for starting the deicing water or for ending the deicing water is not yet determined) is turned on in step S3. Confirm. As a result, if ON of the switch SW ₂ is positive (YES), the said switch SW ₂ in the step S4 it is determined that the normally open, deicing water end switch (the second ice-making chamber 12 detecting means which ) Conversely other switch SW ₃ to recognize the deicing water starting switch is normally closed. Thereafter, the control operation proceeds in the sequence of step S5 and subsequent steps under the above-described recognition of both switches SW ₂ and SW ₃ .

Next, to check at step S3, the result is negative (NO), i.e. if the switch SW ₂ is determined not to be turned ON and proceeds to step S6, said another switch SW ₃ Check if it is ON. As a result, when the the switch SW ₃ is ON is affirmative (YES), the switch SW ₃ in step S7 recognizes the normally open deicing completion switch. Thereafter, assuming that both switches SW ₂ and SW ₃ perform the functions as recognized above, the control operation proceeds in a sequence starting with step S8. Incidentally, if the ON operation of the switch SW ₃ in the step S6 is negative (NO), since neither of the two switches SW ₂ and SW ₃ is to be determined as not operating ON, step In S9, it is determined that both switches SW ₂ and SW ₃ are defective, and the operation of the ice making machine is stopped in the next step S10. In this way, even if the installation of the _two switches SW ₂ and SW ₃ whose contact opening / closing types are reversed is mistaken, the normally closed switch and the normally open switch are properly recognized, thereby making the ice making machine Can operate normally without stopping the error.

10 second ice making mechanism, 11 first ice making chamber, 12 second ice making chamber, 13 first ice making chamber,
15 second ice making chamber, 25 second arm, 26 coil spring (connection member),
40 First ice making mechanism, 46 ice making chamber, 48 ice making chamber, 52 water dish,
62 first arm, AM ₁ first actuator, AM ₂ second actuator,
SW ₂ deicing water start switch, WV water supply means,

Claims (5)

A closed cell type that can be selectively equipped with either the first ice making mechanism (40) as a standard model for producing ice cubes or the second ice making mechanism (10) as a variant ice model for producing deformed ice. In automatic ice machine,
The second ice making mechanism (10) includes a second actuator (AM ₂ ) for driving the second ice making mechanism (10) to open and close, and a second arm (25) rotated by the second actuator (AM ₂ ). When the ice making mechanism (10) is mounted on an automatic ice making machine, a deicing water start switch (SW ₂ ) for detecting the movement of the second arm (25) and starting supplying the deicing water is also provided. ,
The first ice making mechanism (40) includes a first actuator (AM ₁ ) for opening and closing the first ice making mechanism (40), and a first arm (62) rotated by the first actuator (AM ₁ ).
Provided with a single sequencer that inputs and stores control commands unique to the first ice making mechanism (40) and control commands unique to the second ice making mechanism (10), and the sequencer corresponds to the selected mounted model. Selected control commands can be selected,
When a control command corresponding to the first ice making mechanism (40) is selected and the operation by the sequencer is started, the deicing water start switch (SW ₂ ) is moved to the first arm ( ₁ ) of the first actuator (AM ₁ ). 62) is detected, the control command of the sequencer is judged to have been selected by mistake, and the operation of the automatic ice maker is stopped.
Further, when a control command corresponding to the second ice making mechanism (10) is selected and the operation by the sequencer is started, the deicing water start switch (SW ₂ ) is moved to the second arm of the second actuator (AM ₂ ). When (25) is not detected, it is determined that the control command of the sequencer has been selected by mistake, and the operation of the automatic ice maker is stopped. The second ice making mechanism (10) is disposed below the first ice making chamber (11), the first ice making chamber (11) having a number of first ice making chambers (13) opened downward, and the first ice making chamber (11). Each of the ice making chambers (13) is provided with a number of second ice making chambers (15) capable of correspondingly closing from below, and is held in a closed position for closing the first ice making chamber (13) during ice making operation. The second ice making chamber (12) which moves during the deicing operation and opens the first ice making chamber (13),
During the ice making operation, ice making water is supplied to the spaces defined in both ice making chambers (13, 15) to form deformed ice. During the ice making operation, the second ice making chamber (12) is connected via the connecting member (26). The second arm (25), which is held in the closed position, is rotated in a direction in which the second ice making chamber (12) is opened by driving the second actuator (AM ₂ ) after completion of ice making, When the deicing water start switch (SW ₂ ) detects the rotation of the second arm (25) by a predetermined angle, the water supply means (WV) is opened to supply the deicing water to the second ice making chamber (12). The closed cell type automatic ice making machine according to claim 1, wherein the second ice making chamber (12) is heated by starting. The first ice making mechanism (40) includes an ice making chamber (48) having a large number of ice making chambers (46) that open downward, and a lower portion of the ice making chamber (48). During the ice making operation, the ice making chamber ( 46) and a water tray (52) that opens the ice making chamber (46) during the deicing operation, and a water tray (52) that can be opened and closed with respect to the ice making chamber (48). 1 actuator (AM ₁ )
During ice making operation, ice making water is supplied to the space defined by the ice making chamber (46) and the water tray (52) to form ice cubes, and when ice making is detected, hot gas is supplied to the ice making chamber (48). The closed cell type automatic ice making machine according to claim 1, wherein the second cell actuator (AM ₂ ) is driven to rotate the water pan (52) in the opening direction. The closed cell according to claim 2, wherein the detection of the second arm (25) by the deicing water start switch (SW ₂ ) is performed when the second ice making chamber (12) is opened in the second ice making mechanism (10). Automatic ice maker. Wherein the detection of the deicing water start switch said by (SW ₂₎ the second arm (25), said second closed according to claim 2, wherein performed at the time of closing operation of the second ice-making chamber in the ice-making mechanism (10) (12) Cell type automatic ice maker.

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