JPS613966A - Method of operating 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 Industrial Application The present invention relates to an ice maker, and more particularly to a method of operating a so-called inverted cell ice maker in which a drive device tilts a water tray that closes an ice maker chamber. It is.

(b) When ice forms in the ice-making chamber of the conventional technique, the water tray is tilted, and the ice that separates from the ice-making chamber slides on the sloping surface of the water tray and is purchased into the ice storage chamber and stored there. The configuration is 0. It was around 7 o'clock. - If the underside of the water wheel 7.1 ice is in strong contact with the surface of the water tray and the water tray is tilted, it may cause damage or damage to the water tray and the water tray device.'' It had reached this point.

The conventional method to solve the drawbacks of such reverse cell type ice machine is as follows.
As disclosed in Japanese Utility Model Application Publication No. 57-120065, the water tray is retracted when the water tray is tilted upon completion of ice making.

However, in this method of water supply, since the tilting of the water tray and the sprinkling of water on the surface of the water tray are started at the same time, an overload is placed on the water tray and the driving device before the close contact between the water tray and the ice is relaxed. It wasn't necessarily an effective solution.

(c) Purpose of the Invention The present invention addresses the above-mentioned drawbacks of the conventional technology and reduces the load on the water tray and the driving device for the water tray when the water tray is tilted, thereby preventing damage and breakage of the water tray and the driving device. aim at something.

B) Structure of the Invention The present invention is an inverted cell type ice maker, which stops the electric compressor and circulation pump of the refrigeration system to end the ice making operation based on an ice making operation end signal, and then stops the ice making operation for a predetermined period of time from the end of the core ice making operation. This is a method of operating an ice maker in which deicing operation using hot gas pressure and tilting of a water tray are started after a certain period of time has elapsed.

(E) Embodiment FIG. 1 shows a partially cutaway side view of an ice making machine embodying the present invention, and shows a large number of ice making compartments (I) that open downward.
A), with one freezing type steamer and 4 pieces (2) on the outer surface of the earthen wall.
T? Fl! MkL engineering. . 1) 1.6,1. . .

from below with sufficient margin, and each small chamber (
There is a fountain hole (3) corresponding to IA) and a return hole (3) on both sides of it.
4), a water tank (6) which is fixedly fixed to the water tank (6), and which communicates with the return hole (4);
6) A circulation pump (9) that circulates the water inside from the fountain hole (3) to each small room (IA) via the water pipe (7) and the distribution pipe (8), and the water tray (5) are tilted and returned. A drive device 01) including a speed reduction motor capable of forward and reverse rotation, and a water sprinkler 0 that sprinkles water on the surface of the water tray (5) when the water supply valve is opened.
and a float tank (
14A) The float (14B) K in the water level switch (14C) is activated, and the water level detection device 04, which detects a predetermined water level in the water tank (6), constitutes a so-called reverse cell type ice making device. The drive device αD is mounted on a support beam (IK fixed to the plate) and has first and second arms (17A) and (17B) extending in opposite directions to the output shaft of the deceleration motor Q11 supported by the IGK. and the peeling aid part (1) of the water tray (5) in the middle part.
7C), and the other end of the coil spring α attached to the end of the first arm (17A) of the cam αη is connected to the side of the water tray (5). The rear part of (5) is supported by the fulcrum shaft (19).The contact point is switched by the first and second arms (17A) and (17B) K, and the button controls the stop supply of electricity to the deceleration motor α. Next, the electric circuit of the present invention, which is a control switch for a seesaw set, will be explained based on Fig. 2.C
10) The electric compressor p of the refrigeration system is a first timer that controls the end of the ice-making operation, and has a first timer contact (22A) that closes the contact when a predetermined time has elapsed. (To) is the deicing detection thermostat that controls the end of deicing operation.
When the temperature of the cooler (1) drops to a predetermined temperature, the L contact (
23A) K switches, and when the temperature rises to a predetermined temperature, H contact (23B) K switches. @ is the first relay connected in series with the water storage switch (c) that closes the contact when a predetermined amount of ice storage is detected, and has a normally closed first relay contact (24A) and a normally open first relay contact (24B). ). The second relay is the normally closed second relay contact (26A) and (26B).
and normally open second relay contacts (26C) and (26D). '(2) is a third relay, which has normally open third relay contacts (27A) and (27B). (13 is a water supply valve connected in series with the water level switch (14C).
2QA1) and (2QA2) are the tilting contacts of the control switch, and (20B1) and (20B2) are the reciprocating contacts of the control switch. (9) The deceleration motor rotates forward or reverse depending on the switching of the control switch ■.
2 is the circulation pump, 2 is the condenser air cooling fan, and 4 is the hot gas pulp. Also (to) is the first timer (2)
The second timer starts based on the ice-making end signal from the ice-making end signal, and has a second timer contact (30A) that closes the contact after a predetermined time period determined by the timer (to) has elapsed. 0υ is the fourth relay connected in series with the second timer contact (30A), and the normally closed fourth relay contact (2QA2) is connected in series with the electric compressor (2I) and between the tilting contact (2QA2) and the deceleration motor Ql. 31A) and (31B). The water level detection device α4 is mechanically provided with a differential so as to prevent water from being supplied during ice making operation.

Next, the present invention will be explained in detail. The water tray (5) is in a horizontal state with each small chamber (IA) closed, as shown by the solid line in Figure 1, and when the power is turned on, the normally closed first relay contact (24A)
, Furthermore, the water supply valve 0, which is energized via the water level switch (14C), opens, and the surface pressure water is sprayed from the water sprinkler Q3 to the water tray (5).
Start supplying water to the water tank (6) through the main return hole (4). In addition, the electric compressor O1) operates and the cooler (1)
The normally closed first relay contact (24Aχ), the tilting contact (2QA1), and the normally closed second relay contact (26
A), the circulation pump (9) and condenser air cooling fan 2 operate to start ice making operation, and then the water tank (6
) when the water level reaches the predetermined water level, the float (14B) K
Therefore, the contact of the water level switch (140) is opened, and the supply of electricity to the water supply valve az is cut off to stop water sprinkling, thereby ending the water supply operation to the water tank (6).

The water in the water tank (6) passes through the water pipe (7) and the distribution pipe (8) and is sprayed from each water fountain (3) into each ice making compartment (IA), and the ice making compartment (IA) is frozen in the ice making compartment (IA). Any excess water that does not go through the return hole (
Repeat the water circulation operation from 4) to the water tank (6)K. After the start of ice making, when the temperature of the cooler (1) drops to the predetermined temperature, the deicing detection thermostat (to) will close the H contact (
(23B) to L contact (23A) K: Switched to the first
When the timer (c) is started and the predetermined time set by the timer has elapsed, the first timer contact (22A) is closed, the second relay wire is energized, and the normally closed second relay contact (22A) is closed.
26A) and (26B) are opened, and the normally open second relay contacts (26C) and (26D) are closed. At this time, the fourth relay 0υ is energized to open the normally closed fourth relay contacts (31A) and (31B), and furthermore, at this time,
The second timer (to) also starts.

As a result, the circulation pump (9), the fan, and the electric compressor (21) are stopped, and the ice-making operation is ended.

At this time, the hot gas valve door opens, but the compressor (2
1) is stopped, hot gas is not circulated to the evaporation pipe (2) and the cooler (1) is not heated.

Then, when a predetermined time has elapsed from the end of the ice-making operation, the second
The timer contact (30A) is opened, the excitation of the fourth relay 0D is released, and the normally closed fourth relay contacts (31A) and (3
1B) closes to normal. From this K, electric compressor Qυ
operates, and at this time the hot gas pulp screen is open, so the hot gas is circulated through the evaporation pipe (2) and the cooler (1) is opened.
) to start deicing operation of the frozen ice in each ice making compartment (IA), and at the same time, the deceleration unit is energized and the water tray (IA) is heated.
5) Start tilting.

In this way, at the end of the ice-making operation, the electric compressor (2υ) is temporarily stopped, cooling of the cooler (1) is stopped for a certain period of time, and then de-icing operation is started using hot gas and the water tray (5) is tilted. By starting K, the close contact between the water bottom surface and the surface of the water tray (5) is relaxed, and the force with which the peeling aid part (17C) of the drive cam 〇η peels off the water tray (5) from the ice is reduced. Drive device Ql)
And the overload on the water tray (5) can be reduced.

Then, when some of the ice-making water left in the water tank (6) is drained while the water tray (5) is tilting, the water level switch (14C) is closed, and the water supply valve 03 is energized, causing the water sprinkler (13 to Start spraying water for cleaning on the surface of the water tray (5).
The second arm (17B) of the drive cam aη switches the control switch from the tilting contacts (2QA1) and (2QA2) to the double-acting contacts (20B1) and (F (2082)), t
7) When the power to the deceleration mode parp is cut off, the water tray (
5) is a busy ice making compartment (IA) as shown by the two-dot chain line in Figure 1.
) ends at the tilted position where it is released.

When the stat (c) detects the predetermined temperature rise of the cooler (1), its contacts change from the L contact (23A) to the H contact (23A).
B) K is switched, the power supply to the first timer (2) is cut off, and the first timer contact (22A) is opened to normal. From this K, the power to the second timer (to) is cut off, the second tie contact (30A) is closed to normal, and the excitation of the second relay is released, and the second relay is normally closed. Contact (26A
) and (26B) are closed to normal, and the normally open second relay contacts (26C) and (26D) are opened to normal. The deceleration motor [alpha] is energized through (26B) and rotates in the reverse direction, the drive cam surface rotates clockwise, and the water tray (5) starts to move backward. Then, when the first arm (17A) on the drive cam surface switches the control switch (2) from the double-acting contacts (20B1) and (20B2) to the tilting contacts @AI) and (2QA2), the The power supply is cut off, and the water tray 15) again completes its return movement in the horizontal position where the ice making chamber (lA) uI4 is closed, as shown by the solid line in Fig. 1, and at this time, the power supply to the hot gas pulp 4 is cut off. At the same time as finishing the deicing operation, cooling of the cooler (1) is started,
The circulation pump (9) and fan are operated to start the next cycle of ice-making operation. Thereafter, when the water level in the water tank (6) reaches a predetermined water level, the water level switch (14C) 17) contact is opened as described above (flow 14B), and the power to the water supply valve (121) is cut off. (6) Finish the water supply operation.

(f) Effects of the Invention As described above, the present invention stops the electric compressor for a predetermined period of time based on the completion of the ice-making operation, and then starts the deicing operation using hot gas and the tilting of the water tray. The close contact between the water plate and the surface of the ice cube is reduced, and the force with which the peeling aid part of the drive cam peels the water plate from the ice is reduced, reducing excessive load on the drive device and the water plate. It is possible to prevent damage or breakage of the device and the water tray and improve durability.

Furthermore, it is possible to prevent the occurrence of a new problem in which the ice in the ice-making chamber melts more than necessary before the water tray is tilted, causing the original shape of the water to swell to deteriorate.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an ice making machine embodying the present invention, and FIG. 2 is an electric circuit diagram of the present invention. (1)...Cooler, (IA)...Ice making compartment,
(5)...Water dish, Ql)...Drive device, (A)...
・・Second timer, (30A)・Second timer contact,
Gυ...4th relay, (31A), (31B)...
Normally closed 4th relay contact. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Shizuo Sano Figure 2

Claims (1)

[Claims] 1. A cooler comprising a large number of ice-making chambers that open downward, a tiltable water tray that closes each chamber, a water tank fixed to the water tray, and a circulation pump. In the ice making machine, the ice making operation is performed by operating the water tank to spray water from the water tank into each of the small chambers from a water fountain hole formed on the water tray surface, and the ice making operation is performed by heating the cooler with hot gas to perform the deicing operation. , based on the ice-making operation end signal, the electric compressor of the refrigeration system and the circulation pump are stopped to end the ice-making operation, and after a predetermined time has elapsed from the end of the ice-making operation, the de-icing operation and the tilting of the water tray are started. A method of operating an ice maker characterized by: