JPH05332649A - Auger type ice-making machine - Google Patents

Abstract

PURPOSE:To provide an auger type ice-making machine wherein sufficient ice-making function can be obtained even in the case of an ice-producing cylinder that has wide diameter and long length. CONSTITUTION:In an auger type ice-making machine, an evaporation pipe 12 is divided into a plurality of pipes 12a, 12b that are connected to each other in parallel, the pipe 12 being wound around the outside periphery of an ice- making cylinder 11, and at the upstream portion of these evaporation pipes 12a, 12b, evaporation valves 13a, 13b are respectively mounted. Each of the expansion valves 13a, 13b is preferably an heat-sensitive expansion valve that acts according to the detection of temperature at an exit side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auger type ice making machine.

[0002]

2. Description of the Related Art In a conventional auger type ice making machine, an evaporation pipe, which is a component of a refrigeration circuit, is wound around the outer circumference of an ice making cylinder, from which water for ice making is supplied from below. By cooling the ice-making cylinder to a freezing temperature, the ice formed on the inner surface of the ice-making cylinder is transferred upward while peeling off the ice by the rotation of the auger that forms a spiral ridge around the ice-making cylinder. As the evaporation pipe, a single pipe having a single structure is adopted.

[0003]

In the conventional auger type ice making machine, since a single pipe having a single structure is adopted as the evaporation pipe, when the ice making cylinder is thick and long, the evaporation pipe becomes long. The pressure loss due to the line resistance and the like increases, and the pressure on the inlet side of the evaporation pipe increases. Therefore, a sufficient difference is secured between the inlet side pressure of the expansion valve disposed upstream of the evaporation pipe (the pressure uniquely determined by the configuration of the refrigeration circuit) and the outlet side pressure (the pressure determined by the inlet side pressure of the evaporation pipe). In some cases, it may not be possible to obtain sufficient ice-making capacity. The present invention has been made to address the above-described problems, and an object of the present invention is to provide an auger type ice making machine that can obtain sufficient ice making capacity even when the ice making cylinder is thick and long.

[0004]

In order to achieve the above-mentioned object, in the present invention, in an auger type ice making machine,
Evaporation pipes wound around the outer circumference of the ice making cylinder were divided into a plurality of pipes and connected in parallel, and expansion valves were arranged upstream of the respective evaporation pipes. Each expansion valve is preferably a temperature-sensitive expansion valve that operates by sensing the temperature on the outlet side.

[0005]

In the auger type ice making machine according to the present invention, the evaporation pipes wound around the outer circumference of the ice making cylinder are divided into a plurality of pipes and connected in parallel, and the expansion valves are arranged upstream of the respective evaporation pipes. Therefore, even when the ice making cylinder is thick and long, each evaporation pipe does not become long, the pressure loss in each evaporation pipe can be reduced, the inlet side pressure of each evaporation pipe can be lowered, and each evaporation pipe can be reduced. It is possible to secure a sufficient difference between the inlet side pressure and the outlet side pressure of each expansion valve disposed upstream of the above, and to obtain a sufficient ice making capacity in each evaporation pipe.

When each expansion valve is a temperature-sensitive expansion valve that operates by sensing the temperature on the outlet side, each expansion valve operates in accordance with the refrigeration load in each evaporation pipe, and each evaporation valve In order to adjust the flow rate of the refrigerant flowing through the pipe, ice making cylinders with different refrigerating loads at each part (the lower part has a large freezing load because there is water close to the outside water temperature, and the upper part has perfect ice) Therefore, the refrigerating load is small), but it is cooled efficiently.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows an auger type ice making machine according to the present invention. In this auger type ice making machine, a copper evaporation pipe 12 wound around an outer circumference of an ice making cylinder 11 formed of a heat transfer material is an ice making cylinder. A lower evaporation pipe 12a wound around a lower part of the ice 11, and an ice making cylinder 11
The upper evaporation pipes 12b wound around the upper part of the are divided into two and are connected in parallel.
Expansion valves 13a and 13b are arranged upstream of a and 12b, respectively. The expansion valves 13a and 13b are temperature-sensitive expansion valves known per se that operate by sensing the temperature on the outlet side, and the temperature-sensitive cylinders 13a1 and 13b1 are connected to the evaporation pipes 12 respectively.
It is attached to the outer circumference of the outlet side end of a, 12b.

The structure of this auger type ice making machine is the same as the conventional structure except the above, and the inflow side of both expansion valves 13a, 13b is connected to a condenser 1 via a flow divider 14 and a dryer 15.
6 is connected to the outlet side, and both evaporation pipes 12a, 12
The downstream side of b is connected to the suction side of a compressor 18 via a collector 17, and both evaporation pipes 12a and 12b and both expansion valves 13a and 13b are connected to the dryer 15, condenser 16, compressor 18 and pressure switch 19 respectively. And the like form a refrigeration circuit.

Further, the ice making water from the ice making water tank 21 is sequentially supplied to the inside of the ice making cylinder 11 from below, and the ice made on the inner surface of the ice making cylinder 11 is surrounded by the spiral ridges 22a. The formed auger 22 is transferred upward while being peeled off by the rotation of the formed auger 22 to form dense ice. The water level L in the ice making water tank 21 is a cooperative action of the float switch 23, the overflow pipe 24, and the water supply valve (a valve that controls the water supply from the water supply source (not shown) to the ice making water tank 21) 25 during the ice making operation. By the drain valve 26, when the ice making is stopped, the water is drained from the ice making cylinder 11 and the ice making water tank 21 to the drain pan 27. Further, the auger 22 is rotatably driven by an electric motor 28 via a gear unit 29.

In the present embodiment constructed as described above, the evaporation pipe 1 wound around the outer circumference of the ice making cylinder 11
2 is divided into two parts, a lower evaporation pipe 12a and an upper evaporation pipe 12b, which are connected in parallel.
Since the expansion valves 13a and 13b are arranged upstream of the evaporation pipes 12b, the evaporation pipes 12a and 12b do not become long even when the ice making cylinder 11 is thick and long, and the evaporation pipes 12a and 1b do not become long.
The pressure loss in 2b can be reduced, the inlet side pressure of each evaporation pipe 12a, 12b can be lowered, and each expansion valve 13a, 13b arranged upstream of each evaporation pipe 12a, 12b. A sufficient difference between the inlet side pressure and the outlet side pressure of each of the evaporation pipes 12a, 1
With 2b, sufficient ice-making ability can be obtained.

Further, since each expansion valve 13a, 13b is a temperature-sensing expansion valve that operates by sensing the temperature on the outlet side, each expansion valve 13a, 13b depends on the refrigeration load on each evaporation pipe 12a, 12b. 13b actuates to operate each evaporation pipe 12a, 12
In order to adjust the flow rate of the refrigerant flowing through b, the ice making cylinders 11 having different refrigerating loads at each part (the lower part has water near the outside water temperature, the refrigerating load is large, and the upper part is completely iced). Since the refrigeration load is small), it can be cooled efficiently.

In the above embodiment, the evaporation pipe 12 wound around the outer circumference of the ice making cylinder 11 is the lower evaporation pipe 1.
2a and the upper evaporation pipe 12b are divided into two and connected in parallel. However, the evaporation pipe 12 is divided into three or more and connected in parallel, and an expansion valve is arranged upstream of each evaporation pipe. It is also possible to implement the present invention.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an auger type ice making machine according to the present invention.

[Explanation of symbols]

11 ... Ice making cylinder, 12 ... Evaporation pipe, 12a ... Lower evaporation pipe, 12b ... Upper evaporation pipe, 13a, 13b ... Expansion valve, 22 ... Auger, 22a ... Spiral ridge.

Claims (2)

[Claims] 1. An evaporation pipe, which is a component of a refrigeration circuit, is wrapped around an outer circumference of an ice making cylinder from which water for ice making is supplied from below, and the ice making cylinder is cooled to a freezing temperature by the same evaporation pipe. In the auger-type ice making machine, the ice made on the inner surface of the ice making cylinder is transferred upward while peeling off the ice by the rotation of the auger having spiral projections formed around it. An auger-type ice maker, which is divided into books and connected in parallel, and an expansion valve is arranged upstream of each of these evaporation pipes. 2. The auger type ice maker according to claim 1, wherein the expansion valve is a temperature-sensitive expansion valve that operates by sensing the temperature on the outlet side.