EP3418656A1

EP3418656A1 - Drainage device for ice maker

Info

Publication number: EP3418656A1
Application number: EP18176365.7A
Authority: EP
Inventors: Cesarino Maroli
Original assignee: Brema Group SpA
Current assignee: Brema Group SpA
Priority date: 2017-06-23
Filing date: 2018-06-06
Publication date: 2018-12-26
Also published as: IT201700070746A1

Abstract

A drainage device (1) for an ice maker (10) is provided, wherein the ice maker (10) comprises an upper portion (11) defining an ice containment enclosure and a lower portion (12) containing at least one power supply unit and a hydraulic apparatus in fluidic through connection with the upper portion (11) and wherein the device (1) is placed in the lower portion (12) and comprises a tank (2) detachably placed in fluidic through connection with the upper portion (11) by means of the hydraulic apparatus and suitable to contain a fluid coming from the upper portion (11), a drainage channel (3) in fluidic through connection with the tank (2) and suitable to allow the fluid to flow towards the outside of the ice maker (10), a drainage pump (4) mechanically connected to said tank (2) and suitable to convey on command the fluid from the tank (2) to the drainage channel (3).

Description

DRAINAGE DEVICE FOR ICE MAKER

The present invention relates to a drainage device for ice maker of the type specified in the preamble of the first claim.
Similar devices are described in patent applications CN-A-102252477 , US-A-2011/284094 , US-A-2016/054043 , JP-A-HI0288437 and DE-A-112006000552 .
In particular, the invention relates to a drainage device for a professional ice maker, for example of the type occurring in catering facilities.
As is well known, ice makers consist of a generally parallelepiped structure comprising an upper portion and a lower portion.
Usually, the upper portion consists of a box structure accessible from the outside and suitable to enclose therein the ice made by the ice maker. The ice can therefore have different shapes and dimensions depending on the means used to make the ice.
Ice makers, which make ice granules or cubes or the like, are known in the current state of the art.
On the other hand, the lower portion of the machines described above is generally, though not necessarily, constituted by a set of power supply and drive means, and hydraulic pipes required for the operation of the machine.
The ice makers known in the current state of the art may comprise drainage devices arranged inside the upper portion and suitable to allow the excess liquid inside the ice maker to be ejected so as to preserve the correct operation of the ice maker.
These devices generally comprise a liquid containment tank and a pump connected to the tank and suitable to allow the fluid contained therein to flow out of the device. Alternatively, the pump can be directly connected to the ice container defining almost the entire upper portion.
The described prior art has a few major drawbacks.
In particular, drainage devices can experience malfunction or operation interruptions that can lead to flooding of the room.
In addition, drainage devices are frequently integrated inside the machine and therefore are difficult to replace in the event of malfunction or failure.
In this context, the technical task underlying the present invention is to devise a drainage device for an ice maker, which is capable of substantially obviating at least some of the above-mentioned drawbacks.
Within the scope of said technical task, a major object of the invention is to obtain a drainage device, which allows the space occupied inside the ice maker to be considerably reduced.
Another major object of the invention is to provide a drainage device, which is easily replaceable or accessible so as to allow proper maintenance.
The technical task and the specified objects are achieved by means of a drainage device for an ice maker as claimed in the appended claim 1. Preferred embodiments are described in the dependent claims.
The features and advantages of the invention will be apparent from the detailed description of preferred embodiments of the invention, with reference to the accompanying drawings, in which:

Fig. 1 is an exploded view of the drainage device according to the invention;
Fig. 2a shows an ice maker including the drainage device according to the invention in a first configuration;
Fig. 2b shows an ice maker including the drainage device according to the invention in an alternative configuration; and
Fig. 3 shows the drainage device according to the invention in axonometric projection.

In the present document, the measures, values, shapes and geometric references (such as perpendicularity and parallelism), when associated with terms like "about" or other similar terms such as "almost" or "substantially", are to be understood as unless measurement errors or inaccuracies due to production and/or manufacturing defects and, especially, unless a slight difference from the value, measure, shape, or geometric reference with which it is associated. For example, these terms, if associated with a value, preferably indicate a difference not exceeding 10% of the value itself.
Furthermore, when used, terms such as "first", "second", "higher", "lower", "main" and "secondary" do not necessarily identify an order, a priority relationship or a relative position, but can simply be used to distinguish more clearly the different components from each other.
The measurements and the data reported in this text are to be considered, unless otherwise indicated, as carried out in the International Standard Atmosphere ICAO (ISO 2533).
With reference to the Figures, the drainage device for an ice maker according to the invention is indicated as a whole by the numeral 1.
The drainage device 1 is preferably suitable to be installed on an ice maker 10 of a known type.
In fact, such an ice maker 10 is, for example, a professional machine for making granular or cubed ice components or the like.
Therefore, the ice maker 10 preferably comprises an upper portion 11 and a lower portion 12.
The upper portion 11 preferably comprises an ice containment enclosure. The latter can be substantially defined, for example, by a container accessible through a door, and is suitable to make and store therein ice cubes or the like.
The second portion 12 is preferably suitable to contain at least one power supply unit and a hydraulic apparatus.
The power supply unit is constituted, for example, by an electric motor or other means suitable to supply energy to the first portion for making ice according to known techniques.
The hydraulic apparatus is preferably in fluidic through connection with the upper portion 11.
In particular, the hydraulic apparatus may comprise tubular elements suitable to allow a fluid to pass therein.
Preferably, the hydraulic apparatus comprises at least one drainage channel suitable to channel therein the fluid coming from the upper portion 11, i.e. from the ice container.
The ice maker 10 and the portions 11, 12 may therefore have variable shapes and dimensions depending on the ice maker model used.
Generally, these machines have square parallelepiped shapes with a rectangular base and define walls and angles.
The device 1 preferably comprises a tank 2, a drainage channel 3 and a drainage pump 4.
The tank 2 is preferably placed in fluidic through connection with the upper portion 11 by means of the hydraulic apparatus and is suitable to contain the fluid coming from the upper portion 11.
Thus, the tank 2 is preferably in fluidic through connection with the drainage channel mentioned above.
In detail, the tank 2 comprises a primary container 20, an air-tight element 21 and a lid 22.
The primary container 20 preferably defines an open box suitable to be closed by means of the lid 22.
The lid 22 also preferably includes a hole or connection means known per se and suitable to ensure the connection between the tank 2 and the drainage channel of the ice maker 10.
On the other hand, the air-tight element 21 is preferably arranged between the primary container 20 and the lid 22 so as to allow the tank 2 to be hermetically sealed. In particular, the air-tight element 21 preferably consists of a known type of seal.
Therefore, the tank 2 is accessible for maintenance and can be easily connected to and disconnected from the ice maker 10.
Moreover, the tank 2 can be arranged inside the lower portion 12 at the angles defined thereby.
Furthermore, preferably, the tank 2 defines a parallelepiped structure, the base of which is substantially wedge-shaped. More preferably, the base is approximately rectangular with a highly bevelled angle, up to forming a fifth diagonal side and approximating the shape of a wedged rectangle.
In this manner, the volume occupied by the tank is limited.
The drainage channel 3 is preferably in fluidic through connection with the tank 2 and suitable to allow the fluid to flow towards the outside of the ice maker 10.
Preferably, the drainage channel 3 comprises a check valve suitable to allow the fluid to flow in one direction only.
In addition, the drainage channel 3 preferably comprises connection means 30.
The connection means 30 are conveniently suitable to detachably connect the device 1 to an external drainage network.
This drainage network can therefore be of a known type and provide drainage channels, for example tubular elements, suitable to allow a fluid to flow towards the outside of the device 1, and hence of the ice maker 10.
In particular, the connection means 30 are composed, for example, of a hose clamp of a known type suitable to trap part of a drainage channel of the drainage network. Also preferably, the drainage channel 3 is suitable to protrude out of the ice maker 10, for example by means of a hole in the wall of the lower portion 12.
The drainage pump 4 is preferably suitable to convey the fluid from the tank 2 to the drainage channel 3.
The drainage pump 4 is, for example, a radial positive displacement pump of a type known in the current state of the art.
In particular, preferably, the drainage pump 4 is not inside the tank 2, but is arranged at least partly outside the tank 2.
In this way, the drainage pump 4 is accessible from the outside.
In addition, the drainage pump 4 is powered independently of the power supply unit of the ice maker 10. The independent powering is preferably obtained through a single cable for the connection to the electrical network, which splits upstream of the power supply of the ice maker 10 and upstream of the "on" switch of the latter, so as to ensure the drainage pump 4 to be powered independently of the turning on or off of the ice maker 10.
In particular, preferably, the drainage pump 4 is powered in parallel with the power supply unit of the ice maker 10 and operates independently of the turning off or on of the ice maker 10.
However, the global power supply, for example a wall terminal, supplies both the pump 4 and the ice maker 10.
Alternatively, the drainage pump 4 may comprise a power supply completely independent of the power supply of the ice maker 10, which may involve, for example, a separate wall terminal.
Preferably, therefore, the drainage pump 4 is operatively connected to secondary power supply means 6.
The secondary power supply means 6 are particularly suitable to connect the drainage pump 4 to known electrical connections.
For example, the secondary power supply means 6 may consist of electrical cables, which are suitable to be connected to wall sockets independently of the ice maker 10, as in the alternative configuration.
Preferably, in the preferred configuration, the secondary power supply means 6 consist of cables or electrical connections suitable to interface with at least one multi-connector of a known type suitable to supply the ice maker 10 and the device 1 in parallel.
In any case, the device 1, and in particular the drainage pump 4 is powered independently of the switching off or on of the ice maker 10.
The device 1 preferably also comprises sensor means 5.
The sensor means 5 are preferably suitable to control the drainage pump 4 so as to activate it when the fluid inside the tank reaches a predetermined threshold level. "Threshold level" is intended to mean the height reached by the fluid inside the tank 2.
In detail, the sensor means 5 are substantially constituted by a pressure switch and comprise a secondary container 50 and a detector 51.
The secondary container 50 is preferably arranged inside the tank 2.
Most suitably, the secondary container 50 is suitable to be arranged within the primary container 20 so as to communicate with it. In this manner, when the fluid enters the tank 2 and rises in level, it also rises in level inside the secondary container 50 according to the principle of communicating vessels.
The detector 51 is thus preferably in fluidic through connection with the secondary container 50 and contains a gas, which is suitable to be placed under pressure when the fluid level rises inside the secondary container 50.
The gas is, for example, air; the detector 51 is therefore suitable to detect the pressure of said gas.
More in detail, the detector 51 comprises a tubular element connected to the secondary container 50 at one end and comprises a pressure sensor 52 at the opposite end. The pressure sensor is of a known type and is suitable to close the tubular element so as to trap the gas inside said tubular element.
The sensor means 5 are also operatively connected to the power supply means 6 so as to enable them to send command pulses to the drainage pump 4 when the pressure reaches threshold values at which the fluid reaches, inside the tank, predetermined threshold values.
Therefore, the secondary power supply means 6 are operatively connected both to the sensor means 5 and to the drainage pump 4 and are suitable to connect them to known electrical connections external to the ice maker 10.
The operation of the device 1, previously described in structural terms, is as follows. The drainage fluid of the ice maker 10 on which the device 1 is installed settles in the tank 2, and in particular in the primary 20 and secondary 50 containers.
When the fluid reaches a predetermined threshold level defined by the height of the fluid inside the tank, the gas inside the detector 51 is at a threshold pressure value that activates the pressure switch preferably constituting the sensor means 5.
Once the threshold value has been reached, the sensor means 5 send a pulse to the drainage pump, thus allowing it to convey the fluid in the tank 2 to the inside of the drainage channel 3.
In this manner, the excess fluid of the ice maker 10 is drained out of it.
The drainage device for an ice maker 1 according to the invention achieves important advantages.
In fact, the secondary power supply means 6 allow the device 1 to operate even when the ice maker 10 is not switched on, in the preferred configuration, or even when the ice maker is not powered or when it fails or malfunctions in the alternative configuration.
The parallel or independent powering thus allows a continuous control of the drainage of the excess fluid inside the ice maker 10, thus preventing flooding which is detrimental to the electrical components.
Moreover, the use of the sensor means 5 including the pressure switch prevents using floats inside the tank and therefore allows the electronic means, such as the pressure sensor, to be kept dry and well separated from the fluid inside the tank.
In conclusion, a further advantage of the device 1 is that it does not substantially encumber the volume of the ice maker thanks to its wedge shape, can be easily installed on any device existing in the market also thanks to its wedge shape that limits the dimensions thereof, and may allow easy maintenance in both configurations.
The invention is susceptible of variations falling within the scope of the inventive concept as defined by the claims.
In this context, all details are replaceable by equivalent elements, and the materials, shapes and dimensions may be any materials, shapes and dimensions.

Claims

A drainage device (1) for an ice maker (10), said ice maker (10) comprising an upper portion (11) defining an ice containment enclosure and a lower portion (12) containing at least one power supply unit and a hydraulic apparatus in fluidic through connection with said upper portion (11),
said device (1) being placed in said lower portion (12) and being characterized in that it comprises:
- a tank (2) detachably placed in fluidic through connection with said upper portion (11) by means of said hydraulic apparatus and suitable to contain a fluid coming from said upper portion (11),

- a drainage channel (3) in fluidic through connection with said tank (2) and suitable to allow said fluid to flow towards the outside of said ice maker (10),

- a drainage pump (4), mechanically connected to said tank (2), suitable to convey on command said fluid from said tank (2) to said drainage channel (3),

- and in that said tank (2) defines a parallelepiped structure, the base of which is substantially wedge-shaped.
The drainage device (1) according to claim 1, wherein said drainage pump (4) is arranged at least partially outside said tank (2) and is powered independently of the turning off or on of said ice maker (10).
The drainage device (1) according to at least one preceding claim, comprising sensor means (5) suitable to control said drainage pump (4) so as to activate said drainage pump (4) when said fluid inside said tank (2) reaches a predetermined threshold level.
The drainage device (1) according to at least one preceding claim, wherein said sensor means (5) are constituted by a pressure switch and comprise a secondary container (50) and a detector (51), said secondary container (50) being arranged inside said tank (2) and suitable to receive at least part of said fluid according to the principle of communicating vessels and said detector (51) being in fluidic through connection with said secondary container (50), containing a gas suitable to be placed under pressure when said fluid level rises in said secondary container (50) and being suitable to detect said pressure of said gas.
The drainage device (1) according to at least one preceding claim, wherein said detector (51) comprises a tubular element connected to said secondary container (50) at one end and comprising a pressure sensor at the opposite end, said pressure sensor being suitable to close said tubular element so as to trap said gas inside said tubular element.
The drainage device (1) according to at least one preceding claim, wherein said tank (2) comprises a primary container (20), an air-tight element (21) and a lid (22), said primary container (20) defining an open box suitable to be closed by means of said lid (22) and said air-tight element (21) being placed between said primary container (20) and said lid (22) and consisting of a known type of seal.
The drainage device (1) according to at least one preceding claim, comprising secondary power supply means (6) operatively connected to said sensor means (5) and said drainage pump (4), said secondary power supply means (6) being suitable to connect said sensor means (5) and said drainage pump (4) to known electrical connections external to said ice maker (10).
The drainage device (1) according to at least one preceding claim, wherein said drainage channel (3) comprises connection means (30) suitable to detachably connect said device (1) to an external drainage network, said connection means (30) being composed of a hose clamp of a known type suitable to trap part of a drainage channel of said external drainage network.
An ice maker (10) comprising a drainage device (1) according to at least one preceding claim.