JPS59107170A - Auger type ice machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Field of the Invention The present invention relates to an ice maker with an auger set, and particularly; in which impurities such as calcium and magnesium deposited in the lower part of the cooling cylinder are drained from the drain pipe by opening the drain valve. The present invention relates to an improvement of an auger ice maker which cleans the inside of the cooling cylinder by replacing the water with fresh water.

(b) Prior art and its problems In general, when this type of ice maker is operated for a long period of time, impurities such as calcium and magnesium contained in the water appropriately supplied into the cooling cylinder gradually accumulate in the lower part of the cooling cylinder. It is known that it is precipitated in

Conventionally, in order to deal with this, a cleaning operation has been performed in which the water in the cooling cylinder is drained by opening the drain valve and replaced with new water in the water storage tank, but the draining speed (amount) is extremely slow. Alternatively, in the event of a water outage in which the water supply to the water storage tank is stopped during drainage, the water level in the water storage tank decreases and eventually becomes empty, causing air to flow into the cooling cylinder.

In this state, when the water drain is finished or the water cut-off is canceled and the ice-making operation is restarted, an air pocket is generated in the cooling cylinder, resulting in supercooling, which causes a serious drawback that normal ice-making operation cannot be continued.

(c) Purpose of the Invention The present invention periodically and automatically opens the drain valve to clean the inside of the cooling cylinder and to drain air into the cooling cylinder in order to prevent impurities from depositing in the lower part of the cooling cylinder. To provide an ice making machine with a set of augers capable of always performing normal ice making operation while preventing intrusion.

2) Embodiment of the Invention Figure 1 is a system diagram showing an outline of an auger ice maker implementing the present invention. It is a cooling cylinder with a refrigerant pipe (5) wound around its outer surface which forms a refrigerant circuit together with a refrigerant circuit (4), etc. Inside the cylinder (1), an ice cutting auger (6) is connected to an upper bearing (7). It is rotatably supported by a lower bearing (8). The auger (6) is connected to the auger motor (6) via the reducer (9), and the ice generated on the inner wall of the cooling cylinder (1) is removed from the auger (6).
After the ice is scraped off by the upper bearing (7), it is transferred to a plurality of compression passages αη formed on the outer periphery of the upper bearing (7), and the ice compressed here is transferred to the outlet pipe ( 2) to the water storage (to). (b) is a water storage amount detection device that detects a predetermined amount of water in the water storage tank α, and is of a temperature type. (A) is a water storage tank that determines the water supply level of the cooling cylinder (1), and the bottom of this tank (to) and the lower part of the cooling cylinder (1) are connected by a water supply pipe αQ. α force is an external water supply pipe that supplies water to the water storage tank (16), and a water level detection device (
The water supply valve α Samurai, which is controlled by For example, the water level detection device uses a float type that opens and closes the pipe in the pipe using a built-in magnet float (18A) that rises and falls as the water level fluctuates, and the upper reed switch (18B) controls the water supply valve α. , the lower reed switch (18C) is used to detect water outage. The pipe is a drainage pipe for cleaning inside the cooling cylinder (1).
) is connected to the lower part of the cooling cylinder (1), and the water in the cooling cylinder (1) is drained by opening the drain valve f2.1).

Next, the electric circuit of the present invention will be explained based on FIG. (
A) is a power switch, and (to) is a first relay connected in series with the upper reed switch (18B), which has normally closed first relay contacts (23A) and (23B).

(C) is a second relay connected in series with the lower reed switch (18C), and the normally open second relay contact (24A
) and a normally closed second relay contact (24B). Qf
) is the water supply valve connected in series with the normally closed first relay contact h (23B), and (14A) is the water storage whose contact opens when the water storage amount detection device a chrysanthemum detects a predetermined water amount in the water storage 03. a third relay (c) having a normally open third relay contact (25A) in series with the switch (14A);
, a cam-type timer (4) that periodically closes the timer contact (26A) for a predetermined period of time, and the drain valve (c).
is connected. Also, the normally open third relay contact (25
The auger motor (g), the blower (3), and the electric compressor (2) are connected in series with A).

Next, the cleaning operation of the present invention including the ice making operation will be explained.

When the power switch (A) is turned on, if the water tank 00 is empty, the first relay will not be energized, so one water supply valve will be opened, which is energized via the normally closed first relay contact (23B). and supply water to the water storage tank α. At this time, since the lower reed switch (18C) is closed, the second relay (c) is energized, and the normally closed second relay contact (24B) is energized.
is open, the third relay wire is de-energized, and the third relay wire is normally open.
Since the relay contact (25A) is open, the auger motor (g), blower (3), and compressor (2) do not operate.

When water is supplied to a predetermined water level in the water storage tank α, the upper reed switch (18B) is closed, the first relay wire is energized, and the normally closed first relay contacts (23A) and (23B) are closed.
Open the circuit. As a result, the water supply valve 0 closes and stops the water supply, while the second relay (c) is de-energized and the normally closed second relay contact (24B) is closed, and the third relay (
C) is energized, so the third relay contact (25A) is normally open.
The ice-making operation is started by closing the circuit and operating the auger motor (a), blower (3), and compressor (2).

At the same time, timer (1) is started. In addition, the cooling cylinder (
The water supply level in 1) increases as the water level in the water storage tank α rises, and is finally controlled to a predetermined level in the water storage tank (4).

As described above, when the ice-making operation starts, the ice formed on the inner wall of the cooling cylinder (1) is scraped off by the rotation of the auger (6) and transferred to the compression passage (b), where the compressed ice is The water is continuously delivered to the water storage (2) through the tempering pipe (6).

When a predetermined period of time has elapsed from the start of the timer (A), the timer contact (26A) closes, energizes the drain valve (C), opens the drain valve υ, and removes impurities from the lower part of the cooling cylinder (1). While draining the concentrated ice-making water from the drain pipe to the outside, the ice-making water is replaced by supplying new water from the water storage tank α to the cooling cylinder (1) via the water supply pipe αQ. to clean the inside of the cooling cylinder (1).

In this way, when the cleaning operation is started, the water level in the water storage tank 00 decreases, the upper reed switch (18A) opens, the first relay (4) is de-energized, and the normally closed first relay contact (23A) and (23B) are closed, so the water supply valve (IL: 4) is opened and the external water supply pipe αη is connected to the water storage tank OQ.
The water level in the water storage tank αO is maintained at a predetermined upper level.

However, if the amount of water drained from the drain pipe (E) is greater than the amount of water supplied to the water storage tank α at this time, the water storage tank (C)
The water level continues to decrease, eventually dropping to a lower level. The water level detection device (G) detects this lower level and closes the lower reed switch (18C), and at this time, since the normally closed first relay contact (23A) is closed, the second relay (C) is excited and opens the normally closed second relay contact (24B). This cuts off the power to the timer (1) and connects the timer contact (26A).
Even if the drain valve Q1) is closed, cleaning is stopped by closing the drain valve Q1).

Furthermore, even if the water discharge volume is smaller than the amount of water supplied to the water storage tank (g) and the water level in the water storage tank (a) can be maintained at a predetermined upper level, for example, if water is cut off during cleaning, The water level in the water storage tank Qf9 rapidly drops to a lower level, and cleaning is stopped in the same manner as described above.

On the other hand, at the same time that the water level in the water storage tank αQ drops to the lower level and cleaning is stopped, the third relay (c) is de-energized and the normally open third relay contact (25A) opens, so the auger Power to the motor (g), electric blower (3), and electric compressor (2) is cut off, and ice-making operation is also stopped.

Then, when the water level in the water storage tank rises to the predetermined upper level again and the upper reed switch (18B) is closed, the ice-making operation is restarted.

(E) Effects of the Invention As described above, the present invention operates by periodically opening the drain valve for a predetermined period of time using a timer to drain the water in the cooling cylinder from the drain pipe and replace it with fresh water in the water storage tank. , the inside of the cooling cylinder can be effectively cleaned, thereby preventing the precipitation of impurities in the lower part of the cooling cylinder, and moreover, the water level in the water storage tank can be lowered to a predetermined lower limit level during cleaning, that is, during draining operation. When this occurs, the drain valve is closed to prevent air from entering the cooling cylinder, so that normal ice-making operation can be carried out at all times without causing overcooling when ice-making operation is restarted.

[Brief explanation of drawings]

Figure 1 is a system diagram of the auger ice maker of the present invention, Figure 2
The figure is also an electrical circuit diagram. (1)...Cooling cylinder, 0 words...Water storage tank, Nephew...Water level detection device, (18C)...Lower reed switch, Kanji...Drain pipe, Qυ...Drain valve, (
E)...Timer, (26A)...Timer contact. Figure 1 Figure 2

Claims (1)

[Claims] 1. A cooling cylinder equipped with a refrigerant passage for the refrigeration system on its outer surface, a lower part of the cylinder, a water supply pipe that supplies water appropriately supplied to a water storage tank into the cooling cylinder, and a drain pipe with a drain valve interposed in communication. , an auger ice maker comprising an auger rotatably disposed in a cooling cylinder for bristling ice generated on the inner wall of the cylinder and transferring it upward; a timer device for periodically operating the drain valve for a predetermined period of time; and an auger set comprising a water level detection device that detects when the water level of the water storage tank drops to a lower limit level while the drain valve is in operation and stops the operation of the drain valve.