JPH0391667A - Ice making machine - Google Patents

Abstract

PURPOSE:To prevent air bite and minimize the water supply quantity to a water tank by installing a delay device which delays by a specified time from the start of ice making process the operation of a circulation pump which circulates water in the water tank through each ice making chamber during ice making process. CONSTITUTION:An attempt is made to install a circulation pump 9 which circulates water in a water tank 6 through each ice making chamber during ice making process. When a water pan has finished double acting and an ice making process starts simultaneously, water is sprayed over the surface of the water pan and water supply to the water 6 is arranged to start. When the water is supplied to a specified water level in the water tank, water spray is halted. Then, an attempt is made to install a delay device which delays the operation of the circulation pump 9 by a specified time from the start of ice making process. When water is supplied to the specified water level in the water tank 6, after starting the ice making process in this manner, the operation of the circulation pump 9 is adapted to start. This construction makes it possible to prevent the circulation pump from air bite and maintain a required quantity of water since the circulation pump 9 starts its operation before the specified water level in the water tank is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Industrial Application Field The present invention relates to an inverted cell type ice making machine.

(b) Conventional technology Conventionally, the operating method for this type of ice maker was
As disclosed in Publication No. 825, at the same time as the water tray finishes its double movement and starts the ice-making process, water is sprayed from a water sprinkler onto the surface of the water tray to start supplying water to the water tank, and the predetermined water level of the water tank is maintained. When water is supplied, the water sprinkler stops watering and ends the water supply.

(8) Problems to be Solved by the Invention In this prior art, since the operation of the circulation pump is started at the same time as the start of the ice-making process, the operation is performed without water in the water tank. Even if water is supplied to the specified water level, air traps will occur in the circulation pump.
Until this air is released, the water in the water tank cannot be circulated from the water tray to the ice making compartment.

Furthermore, even if this air leakage is resolved in a short period of time, the water volume in the water tank is normally designed to be the minimum required amount, so the air trap may be resolved after a predetermined water level is detected. This frequently occurred, leading to problems such as cloudy water and the formation of hollow ice due to water shortages.

The present invention provides an ice maker which prevents the air trapping of the prior art and also reduces the amount of water supplied to the water tank to the minimum necessary amount.

(=) Means for Solving the Problems In order to solve the above problems, the present invention provides a cooler having a plurality of divided ice-making compartments that open downward, a water tray for closing each ice-making compartment, and a water tray for closing each ice-making compartment. A water tank fixed to a water tray, a drive device that tilts and moves the water tray, a water sprinkler that sprinkles water on the surface of the water tray and supplies water to the water tank, and a water tank that sprinkles water in the water tank during the ice making process. A circulation pump that circulates in the chamber is provided, and at the same time as the water tray finishes its backward movement and starts the ice-making process, it sprinkles water on the surface of the water tray and starts supplying water to the water tank, so that the water level in the water tank reaches a predetermined level. The ice maker is configured to stop sprinkling water when water is supplied, and is provided with a delay device that delays the operation of the circulation pump for a predetermined period of time from the start of the ice making process.

0> Effect According to the present invention, the operation of the circulation pump is started when the ice making process is started and the water is supplied to the predetermined water level in the water tank, so that it is possible to prevent air from being trapped in the circulation pump, and to maintain the water at the predetermined water level in the water tank. Since the circulation pump starts operating before detecting the amount of water, the required amount of water can be secured.

(F) Examples Examples of the present invention will be described below with reference to the drawings.Second
The figure shows a partially cutaway front view of the ice-making function section of the ice-making machine of the present invention, and shows a plurality of ice-making chambers (IA) that open downward.
), the cooler (1) with an evaporation pipe (2) installed on the earthen wall, and each ice-making compartment (IA) are placed from below with sufficient margin, and each ice-making compartment (IA) is placed on the surface. a water tray (5) formed with a fountain spout (3) and a return hole (4) corresponding to the water tray (5), a water tank (6) fixed to the water tray (5), and a water tank (6).
A circulation pump (9) that circulates the water inside from the water fountain (3) to each ice making compartment (IA) via the water pipe (7) and the distribution pipe (8) that communicates with it, and the water tray (5) are tilted. and a drive device E including a deceleration motor (10) capable of forward and reverse rotation for backward movement.
(11) and water fil (5) when the water supply valve (12) is opened.
) Sprinkle water on the surface of the water tank (6) through the return hole (4)
a water sprinkler (13) that supplies water to the water tank (13) and a float (14
This is a so-called reverse cell type ice maker which is mainly composed of a water level detection device (14) which operates a water level switch (14C) and detects a predetermined water level in the water tank (6) by the drive device (11B). For installation fixed to the support beam (15), use a plate (
An arm (17) is fixed to the rotating shaft of the deceleration motor (10) supported by the deceleration motor (16), and one end of the arm (17) is
A) The other end of the coil spring (18) attached to the water plate (5)
The rear part of the water fil (5) is connected to the side part of the water fil (5).
It is rotatably supported. (29) is an arm (1) that rotates counterclockwise due to the forward rotation of the deceleration motor (10).
7> other end <17B) and the motor <lO
) is turned off to stop the water dish <5> at a predetermined tilted open position, and the motor (10 〉Turn off the power to the water tray (5)
This is a seesaw type control switch that stops the system at a predetermined horizontal closing position.

Next, the electric circuit of the present invention will be explained based on FIG. (
21) is an electric compressor for the refrigeration system, and (22) is a timer for controlling the end of the ice-making operation, which has a timer contact (22A) that closes the contact when a predetermined time has elapsed. (23)
is a dehydration end detection thermostat that controls the end of dehydration operation, and when the temperature of the cooler (1) falls to a specified temperature,
When the contact (23A) is switched and the temperature rises to the specified level, H
Switched to contact (23B). (24> is the first relay,
It has a normally open first relay contact (24A') interposed between the series circuit of the water level switch (14C) and the water supply valve (12). (25) is a second relay connected in series with the water storage switch (26) which closes when a predetermined water storage amount is detected, with a normally closed second relay contact (25A) and a normally open second relay contact (25B). has. (27) is a third relay, which has normally closed third relay contacts (27A) and (27B) and normally open third relay contacts (27C) and (27D).
(28) is the fourth relay, the normally open fourth relay contact (28
A) and (28B). (29A1) and (29
A2> is the tilting contact of the control switch (29>), (29
B1) and (29B2) are double-acting contacts of the control switch. (10> is the deceleration motor that rotates forward or reverse depending on the switching of the control switch (29), (9) is the circulation pump, (30) is the condenser air cooling fan, (31)
is hot gas pulp. (32) is the circulation pump (9
) is a delay timer as a delay device that controls the operation of
A timer contact (32A) that closes after a predetermined time (about 5 seconds in the example) is connected in series with the circulation pump (9).The water level detection device (14) is mechanically equipped with a differential element. I have a shekel with me so that I don't have to supply water while the ice is being made.

Next, the present invention will be explained in detail. The water 10k (5) is in a horizontal state blocking the ice making compartment (IA) as shown by the solid line in Figure 2, and when the power is turned on, the normally closed second relay contact (25
A), and the first relay (
24> is energized and closes the normally open first relay contact (24A). This opens the water supply valve (12), which is energized via the water level switch (14C) and the normally open first relay contact (24A), and sprinkles water from the water sprinkler (13) onto the surface of the water tray (5). Mainly, water starts to be supplied to the water tank (6) through the return hole (4). Also, the electric compressor (21〉) operates to cool the cooler (1) and the normally closed second relay contact (
25A), the tilting contact (29A1), and the normally closed third relay contact (27A) to start operation of the condenser cooling fan motor (30), and the delay timer <32
> is also energized, and after a predetermined time, the circulation pump (9
The water level at which the suction port of
9〉 is energized to start ice making operation, and then the water tank (6
> When the water level reaches a predetermined level, the float (14B) opens the contact of the water level switch (14C) and the water supply valve (
12> is turned off to end the water supply operation to the water tank (6).

The water in the water tank (6) passes through the water supply pipe (7) and the distribution pipe (8) and is sprayed from each water fountain (3) into each ice making compartment (IA), and the remaining water flows through the return hole (4). 〉 returns to the water tank (6) repeatedly, and when the temperature of the cooler (1〉) falls to a predetermined temperature, the dehydration end detection thermostat (2)
3> switches from the H contact (23B) to the L contact (23A) and starts the timer (22). When the predetermined time set by the timer (22) has elapsed, the timer contact (22A) is closed, the third relay (27> is energized, and the normally closed third relay contacts (27A) and (27B) are opened. Open third relay contacts (27C) and (27D)
) is closed. As a result, the circulation pump (9) and fan (30) are stopped to end the ice-making operation, and the hot gas valve (31) is opened to heat the cooler (1) with hot gas and create ice in the ice-making compartment (IA). Start the dehydration operation.Please note that the delay timer (32) will be de-energized, so
While the timer contact (32A) is opened, the deceleration motor (10) is energized via the timer contact (22A) and the tilting contact (29A2) to rotate forward, and the arm (17>) rotates counterclockwise. Accordingly, the water plate (5) starts to tilt, and when some of the remaining water in the water tank (6>) is drained during the tilting of the iron water a (5), the water level switch (14C) closes.
At this time, since the normally open first relay contact (24A) is closed, the water supply valve (12) is energized and the water sprinkler (13) is turned on.
Start spraying 1 [L of water (5) on the surface for cleaning. The other end (17B) of the arm (17) then moves the control switch (29) to the tilting contacts (29A1) and (29A2).
When switching from to double-acting contacts (29B1) and (29B2), the power to the deceleration motor (10) is cut off, and the water tray (5) opens the ice making compartment (IA) as shown by the two-dot chain line in Figure 2. End the tilting movement at the tilted position.

Then, when the ice leaves each ice making compartment (IA), the dehydration end detection thermostat (23) detects a predetermined temperature increase in the cooler (1) and switches from the L contact (23A) to the H contact (23B).
When switched to , the power to the timer (22) is cut off and the timer contact (22A) returns to normal. Also, the excitation of the third relay (27) is released and the third relay contact (27) is normally open.
7C) and (27D> to the normally open third relay contact (27
A> and (27B), so the double-acting contact (29B1
), the deceleration motor (10) is energized and rotates in reverse through the normally closed third relay contact (27B), and the water i (5) starts to move backward, and the first relay (24) is de-energized. The normally open first relay contact (24A) is opened and the water supply valve (12) is opened.
is closed to stop spraying water on the surface of the water 111(5) for cleaning.

One end (1) of the arm (17) rotates clockwise.
7A) connects the control switch (29〉) to the double-acting contact (29B1)
and (29B2) to the tilting contact (29A1) and (29
When switching to A2), the power supply to the deceleration motor (10) is stopped, and the water tray (5) again completes the return movement at the position where the ice making chamber (IA) is closed, as shown by the solid line in Figure 1, and the hot The power supply to the gas valve (31) is also cut off to end the dehydration operation, and at the same time, cooling of the cooler (1>) is started, the circulation pump (9) and the fan (30) are operated, and the next cycle of ice-making operation is started. At this time, the 11th J relay (24) is energized via the tilting contact (29A1) and the normally open first relay contact (24A) is closed, so the water supply valve (12) opens and the water is sent from the sprinkler (13) to the water tray. Sprinkle water onto the surface of the water tank (6).
) to start supplying water for ice making. Since the water tray (5) is in a horizontal state, this water is supplied to the water tank (6) mainly from the return hole (4) without waste. After this, water tank (6)
When the water level reaches the predetermined water level, the float (14
B) opens the contact of the water level switch (14C>), cuts off the power to the water supply valve (12), and ends the water supply operation to the water tank (6).

(G) Effects of the Invention The present invention supplies water for ice making to the water tank in a horizontal state where the water tray is blocking the ice making chamber, so that the water sprinkled on the surface of the water tray is not drained wastefully and flows into the water tank. Water is supplied;
It is extremely effective in saving water, and the circulation pump is operated when the water tank is filled to a specified level.
In addition to preventing air from being trapped in the circulation pump, since the predetermined water level in the water tank is detected while the circulation pump is operating, the formation of cloudy water and hollow ice due to insufficient water volume is eliminated, and transparent ice can be provided. It is possible to improve quality.

[Brief explanation of drawings]

FIG. 1 is a control electrical circuit diagram of the ice maker of the present invention, FIG. 2 is a partially cutaway front view of the ice making function section of the ice maker, and FIG. 3 is a diagram showing a time chart of the present invention. (6)...Water tank, <9>...Circulation pump, (
13)... Water sprinkler, (32>... Delay timer
(32A)...Timer contact.

Claims (1)

[Claims] 1. A cooler having a plurality of divided ice-making compartments that open downward, a water tray that closes each ice-making compartment, a water tank fixed to the water tray, and a drive device that tilts the water tray; A water sprinkler that sprinkles water on the surface of the water tray and supplies water to the water tank, and a circulation pump that circulates the water in the water tank to each of the ice making chambers during the ice making process are provided, and the water tray completes its return motion and the ice making process is completed. In an ice maker configured to start supplying water to a water tank by sprinkling water on the surface of the water tray at the same time as starting, and stopping water sprinkling when the water reaches a predetermined water level in the water tank, the operation of the circulation pump is performed. An ice making machine characterized by being provided with a delay device that delays the ice making process for a predetermined period of time from the start of the ice making process.