JPS6191472A - Continuous 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 Field of the Invention The present invention relates to a continuous ice making device, and in particular to an improvement for increasing the ice making capacity in summer by cooling the ice making water using a separate refrigeration system. It is something.

b. Conventional technology Conventionally, ice making equipment such as auger-type ice makers that have an ice making water storage tank configured to store ice making water have a significantly lower freezing capacity at high temperatures such as in summer, so the amount of ice produced is also large. As the demand for ice increases during the summer, water shortages tend to occur. In order to ensure a sufficient amount of ice to be made, this was achieved by increasing the size of the compressor, ice making mechanism, etc.

C1 Problems to be Solved by the Present Invention In the conventional structure described above, the ice making mechanism etc. were enlarged, so when the demand for ice enters the period of low demand such as winter, the demand for ice decreases, and the refrigeration capacity conversely decreases. Therefore, the ice-making operation cannot be carried out efficiently, and the energy loss is also large. The purpose of this is to provide an extremely effective means for removing 7. In a continuous ice making apparatus that does not use a deicing cycle and that constitutes a refrigeration cycle system and has an ice making water storage tank for storing ice making water to be supplied to the ice making evaporator described in IW, A heat exchanger for cooling water for ice making installed in
a seventh refrigeration cycle system comprising a heat exchanger for cooling water for ice making, a second expansion section, a second condenser, and a second compressor having a smaller capacity than the first compressor, which are connected to each other by refrigerant piping; A continuous ice making device comprising a gas-liquid heat exchanger for exchanging gas-liquid heat between the first M condenser and the first expansion section and between the ice-making water cooling heat exchanger and the second compressor. be.

80 Effect The temperature of the ice-making water in the ice-making water storage tank is the same as that of the first ice-making water.
The refrigeration cycle system 7 cools the ice making water in heat exchange with the ice making water cooling heat exchanger to improve the ice making capacity, and the ice making ability is improved.
The enthalpy (thermal function) of the liquid refrigerant condensed and liquefied in the condenser can be lowered by the gas-liquid heat exchanger, and the ice-making ability can be significantly improved at high temperatures such as in the summer.

f. Embodiments Hereinafter, preferred embodiments of the continuous ice making apparatus according to the present invention will be described in detail with reference to the drawings.

In the drawing, the symbol / is the first compressor, and the discharge pipe /a of this seventh compressor l is the refrigerant pipe, 2a'i
The outlet pipe 3b of the first condenser 3 is connected to the seventh expansion section 5 through the refrigerant pipe 21) and the gas-liquid heat exchanger 4t'6. At the same time, this first expansion section 5 is connected to an ice-making evaporator 60 input pipe 6a via a refrigerant pipe C. This ice making evaporator 6
The outlet pipe 6b of B is connected to the suction pipe/b of the seventh compressor l via the refrigerant pipe 2d, and each of the refrigerant pipes 2a to d
the first compression 'V&/, the first
The condenser 3, the first expansion part j, and the ice-making evaporator 6 constitute a first refrigeration cycle system 7, and the ice-making evaporator 6 receives ice-making water from the ice-making water tank. An ice making water cooling heat exchanger/l is disposed inside the ice making water storage tank which is supplied via the supply pipe 10, and an outlet pipe 11a of this ice making water cooling heat exchanger/l is provided. is connected to the suction pipe/core a of the second compressor/J via the refrigerant pipe 2ef, and the discharge pipe/cob of the λ-th compressor/2 is connected to the second condenser 13 via the refrigerant pipe λf. Inlet pipe/j
connected to a. Outlet pipe 13 of the second condenser 13
b is connected to the inlet pipe 11b of the ice-making water cooling heat exchanger 11 via the second expansion part/lI and the refrigerant pipe ge, and is connected in an annular manner by each of the refrigerant pipes 2e to 2g. L7? : Said second compressor/2, first condenser 3
A first refrigeration cycle system 75 (auxiliary refrigeration circuit) is constituted by the second expansion section L and the ice-making water cooling heat exchanger 11. Further, the refrigerant pipe b between the first condenser 3 and the first expansion section S and the refrigerant pipe e between the ice making water cooling heat exchanger 11 and the second compressor Although not shown, they are connected to each other so that they can exchange heat with each other using a liquid heat exchanger.

Describing the case where the continuous ice making apparatus according to the present invention is fully operated in the above configuration, when the seventh refrigeration cycle system starts operating, the high temperature and high pressure refrigerant gas discharged from the first compressor is transferred to the first condenser. , a low-temperature, low-pressure refrigerant gas that is condensed and liquefied in the condenser 3, and is sucked into the second compression tank by the second refrigeration cycle in the gas-liquid heat exchanger and flows in the direction of the arrow. As a result, the enthalpy (thermal function) of the liquid refrigerant condensed and liquefied in the first condenser 3 can be reduced.

Furthermore, since the ice-making water cooling heat exchanger 11 is cooled by the operation of the first refrigeration cycle system/S, the ice-making water 9 in the ice-making water storage tank is maintained at a low temperature on the verge of freezing. , When the temperature of the ice-making water is high during high temperatures such as summer, or when you want to increase the ice-making capacity, use g-compression +A.
If the first refrigeration cycle system 15 according to 7.2 is operated,
It is possible to greatly increase the ice making capacity.

Said eleventh second refrigeration cycle system7. /S refrigerating capacity state using a Mollier diagram: A, B, C, D in Figure 1.
The range shown by is a Mollier diagram based on the refrigeration cycle of a conventional continuous ice making device, and the range shown by ■ shows its refrigeration effect. Next, denoted by person, B, CI, DI 1. The range shown is a Mollier diagram based on the refrigeration cycle of the continuous ice-making apparatus according to the present invention, and the range indicated by ■ indicates the increased refrigeration effect compared to the conventional one. Since it has the above-mentioned structure and operation, by having the second refrigeration cycle system work together with the first refrigeration cycle system, it is possible to lower the temperature of ice-making water, and also to reduce high temperature and high pressure. Enthalpy of liquid refrigerant? By doing so, during peak demand periods such as summer, or when you want to increase ice making capacity,
Ice making capacity can be greatly increased by operating the second refrigeration cycle system.0 In winter or when ice consumption is low, the operation of the second refrigeration cycle system, which is an auxiliary refrigeration function, can be stopped. By leaving it in the refrigerator, only the required amount of ice is made, making it possible to make ice efficiently throughout the year.

[Brief explanation of drawings]

The drawings show a continuous ice making apparatus according to the present invention, and FIG. 1 is a block diagram showing the overall configuration, and FIG. 1 is a Mollier diagram showing the refrigeration effect. / is the first compressor 1.2a - g is the refrigerant pipe, 3 is the first condenser, da is the gas-liquid heat exchanger, 5 is the first expansion section, 6 is the ice making evaporator, 7 is the first refrigeration Cycle system, t is an ice-making water storage tank, ri is ice-making water, 10 is a supply pipe, 11 is a heat exchanger for cooling ice-making water, /ko is a λ-th compressor, 13 is a second condenser,
1 is a second expansion section, and 15 is a second refrigeration cycle system. Patent applicant: Hoshizaki Electric Co., Ltd. Figure 1 C Figure 2 Enthalpy (independent)

Claims (1)

[Claims] The first compressor (1), the first condenser (3), the first expansion section (5
) and the ice-making evaporator (6) are connected by refrigerant piping (2a to 2d) to form a first refrigeration cycle system (7),
In a continuous ice making apparatus that does not use a deicing cycle and has an ice making water storage tank (8) for storing ice making water to be supplied to the ice making evaporator (6), the ice making water storage tank (8) Ice making water cooling heat exchanger (1
1), the ice-making water cooling heat exchanger (11), a second expansion section (14), a second condenser (13), and a second compressor (12) having a smaller capacity than the first compressor (1). ) and the refrigerant piping (
A second refrigeration cycle system (15) consisting of a structure connected to each other by the ice-making water cooling heat exchanger (15), the first condenser (3) and the first expansion section (5), 1
1) and a gas-liquid heat exchanger (4) for exchanging gas-liquid heat between the ice-making water storage tank (8) and the second compressor (12). It is lowered by the water cooling heat exchanger (11), and the first
Enthalpy of the liquid refrigerant condensed and liquefied in the condenser (3)
1. A continuous ice making apparatus characterized in that the continuous ice making apparatus is configured such that the heat function (heat function) can be lowered by the gas-liquid heat exchanger (4).