JPS6219660A - Ice removing device for flow-down 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] G) Industrial Field of Application The present invention relates to a flow-down ice maker that uses the heat sensitivity of water to de-ice ice frozen in a cooler. This relates to a de-icing device.

(Gl! Conventional technology) For example, Japanese Utility Model Publication No. 59-38688 describes a conventional ice making machine that performs deicing operation using the heat sensitivity of water. A standby tank (7) is provided to store water, and the deicing water in the standby tank (7) is supplied to the deicing water pipe via the deicing pipe (13, circulation pump I and water pressure adjustment valve Q5J). The configuration of the device is disclosed.

el Problems to be Solved by the Invention The prior art de-icing system described above requires the construction of a spare tank and a circulation pump exclusively for de-icing, which leads to the problem that the device becomes larger and more complex. It is conceivable to eliminate the reserve tank and circulation pump and supply de-icing water directly from the water pipe, but conventional ice makers have a configuration in which the reserve tank faces the overflow pipe from the ice-making water tank. Therefore, it is not possible to eliminate the reserve tank.

B) Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides a water supply system in which tap water is directly supplied to the cooler by opening the water supply solenoid valve upon completion of the ice-making operation. A hot gas circuit that circulates hot gas from the refrigeration system through the pipes and cooler, and a predetermined water level in the water storage tank that stores the tap water fed to the cooler (b) is detected to control the closing of the water supply solenoid valve. This deicing device for a down-flow ice maker is equipped with a water level detecting device and a deicing detecting device that detects the detachment state of ice frozen in the cooler and stops the operation of the hot gas circuit.

(E) Function According to the above configuration, upon completion of the ice making operation, the water supply solenoid valve and the hot gas circuit are activated, and the ice frozen in the cooler is defrozen using both the heat sensitivity of the tap water and the heat of the hot gas. Start driving. The water supply solenoid valve closes when the de-icing water collected in the water storage tank reaches a predetermined water level in the water storage tank, regardless of whether or not ice has left the cooler.At this point, the de-icing detection device detects the state of ice removal. If no detection is detected, continue deicing using hot gas alone.

(f) Embodiment Figure 1 shows a system configuration diagram of a down-flow ice maker equipped with the device of the present invention.
) consists of a pair of water plates (2 persons) and (2B) installed approximately vertically with a gap between them, a cooling nozzle (3) of the refrigeration system, and a pair of water plates arranged on both sides of the cooling pipe (3). This heat conduction button (
4A) and (4B). A cooling pipe (3), an electric compressor (5), a condenser (7) that is forcedly air-cooled by a blower (6), and an expansion valve (8) as a pressure reducing device.
), etc., are connected in a ring in the refrigerant circuit, which is connected to a hot gas pipe (3) for circulating hot gas to the cooling pipe (3).
9) and a hot gas solenoid valve Oe.

In addition, the buttons (4A) and (4B) arranged in a heat exchange relationship with the cooling pipe (3) are arranged on ice making surfaces (4AL) and (4Bl) that are flush with the surfaces of the water plates (2 people) and (2B).
has.

Next, to explain the water system, 0υ is connected to the water supply pipe 03 with one end connected to the water pipe trap, and tap water is supplied via the water supply solenoid valve (17J) to the upper part of the back of the water plate (2 people) and (2B) A water sprinkler for water supply and de-icing that sprinkles water towards the water plate (2 people) and an ice-making water sprinkler that sprinkles water on the top of the surface of (2B). It is connected to a circulation pump αη located at

A water collector that collects unfrozen water and the tap water sprinkled from the water sprinkler αυ and leads it to the water storage tank (16). The bottom part of is connected by a communicating pipe ■. 3υ is the auxiliary water supply pipe that supplies water to sub-tank 9, and is connected to the auxiliary water supply solenoid valve (c). (c) is the first water level detection device that controls the closing of the auxiliary water supply solenoid valve @ when the lower limit water level (3) of the sub-tank (II) is detected, and 24) is the upper limit water level (to ); (c) a second water level detection device that controls the closing of the water supply solenoid valve α2 when detecting the water level;
(a) is a temperature sensor as a de-icing detection device that thermally detects the end of ice-making operation and de-icing operation; (a) is a beverage supply pipe connected to the bottom of the sub-tank (19), The supply valve side is connected.

In addition, the water level between the lower limit water levels shall be such that it does not cause any trouble to ice-making operations.

Next, the electric circuit of the present invention will be explained based on FIG. (
5) is the electric compressor, (6) is the blower, αα is the hot gas solenoid valve, α3 is the water supply solenoid valve, αD is the circulation pump, (2) is the auxiliary water supply solenoid valve, (23A
) is the water level switch of the first water level detection device #L (c), (24A) is the water level switch of the second water level detection device 104), (c) is the temperature sensor, and ■ is the temperature sensor (c). A control circuit Gυ is a control relay having normally open contacts (31A) and (31B).

Next, the operation will be explained based on the above configuration. When the power is turned on to the circuit, the auxiliary water supply solenoid valve @ opens, and the control relay Gυ is energized, normally open contacts (31A) and (31
In order to close B), the water supply solenoid valve α is also opened. As a result, the tap water sprinkled from the water sprinkler αυ via the water supply pipe Q3 passes through the back side of the water flow board (2 people) and (2B), falls into the water collector aa, is supplied to the water storage tank αe, and is supplied with auxiliary water. Water is supplied from the pipe CD to the sub-tank αl. Therefore, the first water level detection device (c)
When the water level switch (23A) is detected, the water level switch (23A) is opened and the auxiliary water supply solenoid valve (2) is closed to stop the water supply operation by the auxiliary water supply pipe I21. Furthermore, the water storage tank α is connected from the water supply pipe Q31.
Water continues to be supplied to e, and the upper limit water level of water tank αe +Yl
When the second water level detection device (foundation) detects the water level, the water level switch (24A) opens, the water supply solenoid valve α2 closes, and the water supply pipe (
13) Stop water supply from K.

At this time, the water level of the sub-tank 9, which communicates with the water storage tank (lE9) via the communication pipe (2G), also changes to the water level of the water storage tank (16).
Water is supplied to the same water level as the upper limit water level (to) of 1.

During this water supply operation, the switch (to) switches the ice-making contact (30A) K to the blower (
6) and the circulation pump (Iη), the control relay C31 is self-held via the normally open contact (31A), so water supply operation up to the upper limit water level m is reliably performed.

On the other hand, by switching the switch (to) to the ice making contact (30A), the circulation pump C1η operates, and at this time, the hot gas solenoid valve (101) also closes, so the cooling pipe (3)
The low-temperature refrigerant gas is circulated through the water storage tank Qe, and the water in the water storage tank Qe is force-fed to the water sprinkler α4 through the water pipe a9.
Sprinkle water on the top of the running water board (2 people) and (2B). Therefore, the ice-making water flowing down the water plates (2A) and (2B) is cooled by heat conduction from the cooling pipe (3) to the ice-making surfaces (4A1) and (4Bl) of the buttons (4A) and (4B). The unfrozen water gradually freezes, and the unfrozen water falls into the water collector α mark, returns to the water storage tank (119), and returns to the water plate (2).
Circulate to the upper part of (person) and (2B). In this way,
When the temperature sensor (E) detects that a predetermined amount of ice has frozen on the ice making surfaces (4A1) and (4BT), a signal from the control circuit causes the switch 2 to switch to the de-icing contact (30B).
, the blower (6) and the circulation pump (17) are stopped, and the ice-making operation is ended. Also hot gas solenoid valve αα
The water level switch (24) opens and closes during ice making.
The control relay Gυ is energized via A) and the normally open contact (3
1A) and (31B), the water supply solenoid valve α is opened to start deicing operation. This allows the cooling pipe (
3) The heat of the hot gas that is circulated through the water supply pipe (1 country) and the tap water that is sprinkled from the water sprinkler Uυ to the top of the back side of the water plate (2 people) and (2B) button (4A). In order to increase the temperature of ice-making surfaces (4A1) and (4B),
Remove ice C32 from 4B1).

At this time, the de-icing water sprinkled from the sprinkler (11) is finally supplied to the water storage tank u61 as ice-making water for the next cycle, and the second water level detection device C detects the upper limit water level m of the water storage tank αe. When the temperature sensor (c) detects the detachment of ice c34, the switch (to) is switched to the ice making contact (30A) by a signal from the control circuit, so the hot gas solenoid valve αe closes and deicing operation starts. When the upper limit water level (Y) of the water storage tank α mark (Y) is detected by the second water level detector (2), the control relay 0υ is de-energized and the normally open contact ( 3LA) and (
31B) and closes the water supply t5Ii valve CI2+ to stop the water supply operation.

On the other hand, when the second water level detection device @ (Foundation) detects the upper limit water level of the water storage tank tte+ and the water supply solenoid valve α is closed, the temperature sensor (B) detects the separation of the ice G7J. If not detected, the switch (to) is the de-icing contact (30
B), the hot gas solenoid valve α■ continues to open, and deicing operation continues using hot gas alone. In this de-icing operation, the temperature sensor (c) detects the departure of ice, and a signal from the control circuit causes the switch to close the ice-making contact (
30A), and then the next cycle of ice-making operation is started.

On the other hand, regardless of whether ice making or deicing is in progress, if the beverage supply valve @ opens and the beverage supply pump operates, the sap tank (1
' J yen of water can be freely extracted from the drinking supply pipe (a), and if the water level in the sub tank (19) drops below the lower limit water level, the auxiliary water supply solenoid valve @ opens. , water is supplied to the sub-tank α9 and the sub-tank 0 is
The water level is guaranteed to be the lower limit water level.

The gist of the present invention is basically that one tank is provided, but when two tanks are provided as in the embodiment,
Water level detection device r! that detects the upper limit water level (to)! T (goods) may be placed in the subtank a wound.

(g) Effects of the Invention As described above, the present invention performs deicing operation by directly supplying tap water to the cooler as deicing water, and closes the water supply solenoid valve at a predetermined water level in the water storage tank to supply the deicing water. Since the supply is stopped, it is possible to provide a simple de-icing device that eliminates the need for a standby tank or circulation pump dedicated to de-icing, and also performs de-icing operation using both the heat sensitivity of water and the heat of hot gas. It is possible to finish deicing in a short time, and if the ice has not come off when the supply of deicing water is stopped, the ice can be removed quickly with hot gas alone, which improves reliability. Are better.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of a down-flow ice maker equipped with the device of the present invention, and FIG. 2 is an electric circuit diagram of the present invention. ■...Cooler, (5)...Electric compressor, (9)
...Hot gas bypass pipe, aω...Hot gas solenoid valve, α...Water supply solenoid valve, Q3...Water supply pipe,
θe...Water tank, ■...Sub tank, East
...Second water level detection device, (c)...Temperature sensor. Applicant Sanyo Electric Co., Ltd. and 1 other agent Patent attorney Tsio Sano TS1 Figure 2

Claims (1)

[Claims] 1. In a down-flow ice maker that uses the heat sensitivity of water to de-ice the ice frozen in the cooler, upon completion of the ice-making operation, the water supply solenoid valve is opened and water is supplied from the water pipe to the cooler. A water supply pipe that directly supplies water, a hot gas circuit that circulates hot gas from a refrigeration system to the cooler, and a predetermined water level in a water storage tank that collects the tap water that has been supplied to the cooler is detected to supply the water. A down-flow ice maker characterized by being provided with a water level detection device that controls closing of a solenoid valve, and a deicing detection device that detects detachment of frozen ice from the cooler and stops operation of the hot gas circuit. de-icing equipment