JPS6214536Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention consists of a cooling cylinder with an ice-shaving auger installed inside it, and a cooling cylinder that uses stored water supplied from a water supply pipe by opening and closing a water supply valve as appropriate. An auger-type ice maker that is equipped with a water storage tank that supplies water to the cooling cylinder, uses an auger to scrape off the ice that forms on the inner surface of the cooling cylinder, transfers it to a compression passage, and continuously releases the compressed hard ice pieces into a hopper. In particular, the present invention relates to improvements in a water supply circuit to a water storage tank and an ice making circuit when an ice storage amount detection device detects a predetermined amount of ice in a hopper.

(b) Prior Art Conventionally, in this type of auger-type ice maker, when the ice storage amount detection device that detects the amount of ice stored in the hopper is activated, it is common to stop the ice making operation and also stop the water supply operation to the water storage tank. . This type of control method may be acceptable if the time from when the ice storage amount detection device operates until it returns to normal is long, but if this time is repeated at extremely short intervals, or if the ice storage amount detection device is mechanical. In some cases, it may be frequently hit by scoops or falling ice chips, causing a so-called chattering phenomenon.

Therefore, in the conventional water supply circuit to the water storage tank, when the ice storage amount detection device is activated, the water supply operation is immediately stopped even if water is being supplied, and in order to stop the ice making operation, when the ice storage amount detection device is chattering, the water supply valve is closed. The electric compressor also suffers from chattering, which significantly reduces the durability of the water supply valve and the electric compressor.

(c) Purpose of the invention The purpose of this invention is to prevent the water supply valve and the electric compressor from chattering even if the ice storage amount detection device chattering, thereby improving the durability of the water supply valve and the electric compressor. shall be.

(d) Structure of the invention The invention consists of a cooling cylinder in which an ice-shaving auger is rotatably arranged, and a water storage tank that supplies stored water supplied from a water supply pipe to the cooling cylinder by opening and closing a water supply valve as appropriate. In an auger-type ice maker that continuously discharges hard ice pieces produced in a cooling cylinder into a hopper, the ice storage amount detection device detects the amount of ice stored in the hopper, and the water storage tank is controlled by controlling the water supply valve. A water level detection device that controls the water level within a predetermined range, a water supply control device that continues the water supply operation until the water supply reaches a predetermined water level based on the water level detection device when the ice storage amount detection device operates during water supply, and an ice storage amount detection device This is an auger-type ice maker equipped with an ice-making control device that allows the ice-making operation to continue until the water level drops to a predetermined lower limit water level when the water level is activated.

(e) Embodiment Figure 1 shows a system configuration diagram of the auger ice maker of the present invention, in which 1 shows a refrigerant circuit together with a condenser 4 that is forcedly air-cooled by an electric compressor 2 and an electric blower 3. It is a cooling cylinder with an adiabatic structure in which an evaporation pipe 5 to be formed is wound around the outer surface, and an ice cutting auger 6 is rotatably supported inside the cylinder 1 by an upper bearing 7 and a lower bearing 8. 9 is cooling cylinder 1
This is a water storage tank that supplies stored water to the cooling cylinder 1 from a water supply pipe 11 that is connected to the lower part of the cooling cylinder 1 and has a water supply electromagnetic valve 10 interposed therebetween. 12 is the water supply solenoid valve 1
This is a water level detection device that controls the water level of the water storage tank 9 within a predetermined range by controlling the water level of the hollow tube 1.
2A, a built-in magnet float 12B that rises and falls as the water level changes using the hollow tube 12A as a guide, and an upper reed switch 12C and a lower reed switch 12D whose contacts are opened and closed by the float 12B. Water supply solenoid valve 10 by differential of switch 12C
are opened and closed to control the water level in the water storage tank 9 within the range of A and B.

The ice-shaving auger 6 is connected to an auger motor 14 via a speed reducer 13, and after the ice generated on the inner surface of the cooling cylinder 1 is scraped off by the auger 6, it is transferred to the outer periphery of the upper bearing 7. The ice is transferred to a plurality of ice compression passages 15 formed in the cooling cylinder 1, where it is compressed into hard ice, and the outlet pipe 1 connected to the upper part of the cooling cylinder 1
6 to a hopper 17 having an adiabatic structure and stored therein. Reference numeral 18 denotes an ice storage amount detection device for detecting the amount of ice stored in the hopper 17, and although the structure is not limited, it includes an ice storage switch 18A, and as in the embodiment, the rotating plate 1
In addition to the mechanical type that controls the ice storage switch 18A based on the rotation of the ice storage switch 8B, a temperature type may be adopted.

Next, the electric circuit of the present invention will be explained based on FIG. 2. A first relay 19 is connected in series with the upper reed switch 12C, and has normally open first relay contacts 19A and 19B and a normally closed first relay contact 19.
It has C. 20 is the lower read switch 12
A second relay connected in series with D and has a normally closed second relay contact 20A. 21 is a third relay connected in series with the ice storage switch 18A, and has a normally open third relay contact 21A and a normally closed third relay contact 2.
1B and 21C, which together with the first relay 19 constitute the control device of the present invention. 10 is the water supply solenoid valve connected in series with the normally closed third relay contact 21B. A fourth relay 22 has a normally open fourth relay contact 22A. 2 is the electric compressor, 3 is the electric blower, and 14 is the auger motor.

Next, the operation of the present invention will be explained from the time when ice making starts when water is supplied to level A of the water storage tank 9. In this state, the lower reed switch 12D is open and the second relay 20 is not energized, the lower reed switch 12C is closed and the first relay 19 is energized, and the normally open first relay contacts 19A and 19 are energized.
When B is closed, the first relay contact 19 is normally closed.
C opens. As a result, the water supply valve 10 closes and water supply is stopped, and at the same time, the fourth relay 22 is energized and the normally open fourth relay contact 22A is closed, so that the electric compressor 2, blower 3, and auger motor 14
starts and begins ice-making operation.

As the ice-making operation continues, the water in the water storage tank 9 becomes ice in the cooling cylinder 1, and then becomes hard ice 23 and is released into the hopper 17, so the water level in the water storage tank 9 decreases and reaches the B level. When the voltage decreases to
The first relay contact 1 is normally open because the excitation is released.
9A and 19B are opened, and the normally closed first relay contact 19C is closed, opening the water supply valve 10 and replenishing the water storage tank 9 with water. At this time, the fourth relay 22 is self-held via the normally open fourth relay contact 22A, and the electric compressor 2, blower 3, and auger motor 14 continue to operate. When the water level rises to level A again, upper reed switch 12C
is closed and the water supply operation is stopped as described above.

As the ice making operation continues while repeating the above operations, the amount of ice stored in the hopper 17 increases, and when it finally reaches a predetermined amount of ice, the ice storage amount detecting device 18 operates and the ice storage switch 18A closes. At this time, if the upper reed switch 12C is closed, the first relay 19 is energized, and the normally open first relay contact 19A is closed, and the water supply is stopped, the third relay 21 is energized and normally open. The third relay contact 21A is closed, and the normally closed third relay contacts 21B and 21C are opened. On the other hand, if the upper reed switch 12C is open, the first relay 19 is in a de-energized state, and the normally closed first relay contact 19C is closed during water supply, the ice storage amount detection device 18 will detect chattering. Even if the third relay 21 is activated, the water supply operation is continued without being excited, and the water supply operation is stopped when the water level reaches the A level and the upper reed switch 12C is closed.

Furthermore, even after the ice storage amount detection device 18 operates, the ice making operation continues via the normally open fourth relay contact 22A, which is closed at this time, and the water level in the water storage tank 9 decreases, causing the lower reed switch 12D to close. , second
The relay 20 is energized and the second relay contact 20 is normally closed.
A is opened and excitation of the fourth relay 22 is released.

(f) Effects of the invention This invention prevents the water supply valve from synchronizing with the chatter of the ice storage amount detection device during water supply, and ensures water supply operation up to a predetermined water level and then stops the water supply valve. In addition to significantly improving the durability of the valve, since there is a delay in stopping the ice making operation when the ice storage amount detection device is activated, the electric compressor is not synchronized with the chattering of the ice storage amount detection device, and the electric It is also possible to improve the durability of the compressor.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of the auger ice maker of the present invention, and FIG. 2 is an electrical circuit diagram of the present invention. 10...Water supply solenoid valve, 12 ...Water level detection device,
12C...Upper reed switch, 18 ...Ice storage amount detection device, 18A...Ice storage switch, 19...First relay, 19A, 19B...Normally open first relay contact, 19C...Normally closed first relay Contact, 21...
...Third relay, 21A...Normally open third relay contact, 21B, 21C...Normally closed third relay contact.

Claims (1)

[Scope of utility model registration request] A cooling cylinder with an ice cutting auger rotatably installed inside, and a water storage tank that supplies stored water supplied from the water supply pipe to the cooling cylinder by opening and closing the water supply valve as appropriate, and generate ice on the inner surface of the cooling cylinder. In an auger-type ice maker that scrapes ice with the auger and transfers it to a compression passage, and continuously discharges compressed hard ice pieces into a hopper, an ice storage amount detection device that detects the amount of ice stored in the hopper. a water level detection device that controls the water supply valve to control the water level of the water storage tank within a predetermined range; and when the ice storage amount detection device operates during water supply, water supply at a predetermined water level based on the water level detection device is terminated. an auger-type ice maker comprising: a water supply control device that allows the water supply operation to continue until the ice storage level reaches a predetermined lower limit water level; .