JPH04278156A - Ice making device for ice heat storage - Google Patents

Abstract

PURPOSE:To provide an ice heat accumulating and ice making device of which entire device can be made compact even in case of an ice making device of a large volume and capable of performing concurrently an ice making cycle and a dewatering cycle. CONSTITUTION:In an ice thermal accumulating and ice making device comprising an ice making heat exchanger 1, a compressor 2 and a condensor 3 in which these devices are connected by refrigerant pipes 4, 5 and 6 passing refrigerant, and ice making part at the ice making heat exchanger 1 is constructed such that a plurality of tubes are arranged in a horizontal direction and ice making is carried out within the tubes of a shell-and-tube form. In addition, the ice making part of the ice making heat exchanger is divided into several blocks 7-1 to 7-4 and then the ice making cycle and the deicing cycle can be concurrently carried out.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic ice storage ice making device.

0002

[Prior Art and Problems to be Solved by the Invention] In conventional ice making devices, it is difficult to measure the amount of ice made in the ice making cooler, so a timer is used to switch between the ice making cycle and the deicing cycle, which improves efficiency. Could not switch. In other words, if the deicing time was insufficient, new ice would be made on top of the ice that had not been defrosted, resulting in extremely hard ice that could eventually become impossible to deice. . Furthermore, if the deicing time is too long, the ice that has been made will melt too much, resulting in uneconomical operation.

The present invention has been made in view of the above-mentioned points, and the entire device can be made compact even with a large capacity ice making device.
An object of the present invention is to provide an ice heat storage ice making device that can efficiently switch between an ice making cycle and a deicing cycle, and can reliably remove ice in the deicing cycle.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a heat exchanger for ice making, a condenser, and a compressor, and connects these devices with refrigerant piping through which a refrigerant passes. The ice-making section of the exchanger has a shell-and-tube configuration in which a plurality of tubes are arranged horizontally, and ice is made in the tubes, and the ice-making section of the ice-making heat exchanger is divided into several blocks, at least one of which When one is used as a de-icing cycle, the other is used as an ice-making cycle, so that the ice-making cycle and the de-icing cycle can be performed at the same time. In an ice making device for ice thermal storage configured to stop and seal the heat storage liquid in a tube, the refrigerant discharged gas from the compressor generated in the ice making device for ice thermal storage and condensation is used as a heat source for the deicing cycle. The feature is that the refrigerant in the ice making heat exchanger is heated using the condensed refrigerant liquid in the ice making heat exchanger.

[0005] Furthermore, the apparatus is characterized in that the refrigerant pressure difference generated within the apparatus is used as a driving source for the refrigerant switching valve used for switching between the ice making cycle and the deicing cycle.

[0006] Further, a spray pipe for spraying a refrigerant in a mist is arranged above the plurality of tubes of the ice making section, and
A refrigerant spray pump is provided to send refrigerant to the spray pipe, and the refrigerant spray pump is operated during the deicing cycle.

[0007] Furthermore, the ice making section cycle and the deicing cycle are switched by measuring the ice making amount and the ice melting amount of each heat exchanger.

[0008]

[Function] As described above, short-term heating is possible by using refrigerant discharge gas and condensed refrigerant liquid together as a heat source for deicing. In addition, when the condensed refrigerant liquid is used as a heat source for deicing, the refrigerant liquid itself becomes supercooled.
This will improve the ice making efficiency of the ice making cycle.

[0009] Furthermore, since the amount of ice produced is continuously measured during the ice making cycle and the amount of ice melted during the deicing cycle, and this is used for switching between each cycle, a constant amount of ice making and ice melting can be ensured. Efficient switching is possible.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the system configuration of an ice making device for ice heat storage, which is an embodiment of the present invention.

[0011] As shown in the figure, the present ice heat storage ice making device has the following features:
It is equipped with an ice making cooler (ice making heat exchanger) 1, a compressor 2, and a condenser 3, and these devices are connected by refrigerant pipes 4, 5, and 6. The ice making cooler 1 is divided into four blocks of ice making coolers 7-1, 7-2, 7-3, and 7-4. Each ice making cooler 7-1, 7-2, 7-3, 7-4 has
Shell-and-tube ice making sections 8-1, 8-2, 8-3, and 8-4 are provided in which a plurality of tubes are arranged horizontally. And each ice making section 8-1, 8-2, 8-3, 8
Above -4 is a spray pipe 9-1 that sprays refrigerant in the form of mist;
9-2, 9-3, 9-4 are arranged, and each spray pipe 9-1, 9-2, 9-3, 9-4 is provided with a refrigerant spray pump 10-1, 10-2, 10. -3 and 10-4 are connected.

[0012] Also, each ice making cooler 7-1, 7-2, 7-
3, 7-4, float valves 11-1, 11-2, 11-3, 1 that close when the refrigerant liquid level exceeds a predetermined level to prevent the refrigerant level from exceeding this predetermined level.
1-4 are provided.

[0013] Also, each ice making cooler 7-1, 7-2, 7-
3, 7-4 are refrigerant pipes 12-1, 12-2, 12-3,
It is connected to the refrigerant pipe 4 through 12-4 and refrigerant switching valves V1, V2, V3, and V4.

[0014] Also, refrigerant switching valves V1, V2, V3, V4
are respectively three-way solenoid valves 13-1, 13-2, 13-3.
, 13-4 are provided, and the three-way solenoid valves 13-1,
One opening of each of 13-2, 13-3, and 13-4 communicates with the inside of the condenser 3 via a refrigerant pipe 14. The refrigerant switching valves V1, V2, V3, V4 are three-way solenoid valves 13-1, 1
By switching 3-2, 13-3, 13-4, the refrigerant pressure in the condenser 3 and the ice making cooler 7-1, 7-2, 7-3, 7-
It is designed to be closed due to the refrigerant pressure difference of 4. That is, the refrigerant switching valves V1, V2, V3, and V4 are switching valves whose driving source is the refrigerant pressure difference generated within the device.

[0015] Also, each ice making cooler 7-1, 7-2, 7-
3 and 7-4 communicate with the refrigerant pipe 5 connected to the discharge port of the compressor 2 via the hot gas valves V5, V6, V7, V8 and the refrigerant pipe 15. Also, V9, V10, V1
1, V12 is header 16 and ice making cooler 7-1, 7-
This is an on-off valve provided in the refrigerant pipes connecting 2, 7-3, and 7-4.

In FIG. 1, the ice-making cooler 7-1 is in the de-icing cycle, and the ice-making coolers 7-2, 7-3, and 7-4 are in the ice-making cycle, and ice is always being made in three or more blocks. . In FIG. 1, the refrigerant switching valve V1 is closed and the circulating refrigerant to the ice making cooler 7-1 is closed, and the hot gas valve V5 is open and high temperature refrigerant liquid is guided from the refrigerant pipe 5 into the ice making cooler 7-1. . Furthermore, refrigerant switching valves V2, V3, V
4 is open, refrigerant gas circulates through ice making coolers 7-2, 7-3, and 7-4, and hot gas valves V6, V7, and V8 are closed. In addition, the on-off valve V9 is open, and the on-off valve V9 is open.
10, V11, V12, and V13 are closed.

Ice making cooler 7-2, 7- during ice making cycle
Heat storage liquid (water) is sealed in the tubes of the ice making units 8-2, 8-3, and 8-4 of 3 and 7-4 for freezing. Refrigerant liquid is supplied by refrigerant spray pumps 10-2, 10-3, 10
-4 to the spray pipes 9-2, 9-3, 9-4 in the ice making coolers 7-2, 7-3, 7-4, and the spray pipes 9-2, 9-3, 9-4 It becomes a mist from the nozzle of
It is sprinkled onto the tubes of the ice-making units 8-2, 8-3, and 8-4 and evaporated.

The evaporated refrigerant gas flows through the refrigerant pipes 12-2, 1
2-3, 12-4 and refrigerant switching valves V2 and V in the open state
3. It passes through V4 and is sucked into the compressor 2. The refrigerant pressurized by the compressor 2 is cooled by cooling water in the condenser 3, becomes liquefied refrigerant liquid, and is sent to the header 16. The refrigerant liquid sent to the header 16 passes through the on-off valve V9 and the ice-making cooler 7-1 and is then sent to the ice-making cooler 7-1 by the header 17.
2, 7-3, 7-4.

The high-temperature refrigerant liquid sent from the header 15 to the header 17 through the on-off valve V9 and the ice-making cooler 7-1 is sent to the ice-making cooler 7-1 together with the high-temperature refrigerant gas flowing through the hot gas valve V5. A small amount of the ice in the portion of the frozen heat storage liquid in contact with the wall surface of the tube of the ice making section 8-1 is used as the amount of heat for thawing the ice. At the same time, the refrigerant liquid is supercooled and flows into the ice-making coolers 7-2, 7-3, and 7-4, thereby increasing the cooling effect and improving the efficiency of the entire system.

On the other hand, ice making coolers 7-2, 7-3, 7-4
The refrigerant evaporates, and due to this latent heat of evaporation, the temperature of the heat storage liquid in the tubes of the ice making sections 8-2, 8-3, and 8-4 decreases, and freezes when the temperature drops below the freezing point.

[0021] The ice making unit cycle and the deicing cycle can be switched by each ice making cooler 7-1, 7-2, 7-3.
, 7-4, by measuring the amount of ice made and the amount of ice melted by the heat exchangers of the ice making units 8-1, 8-2, 8-3, and 8-4.

[0022] During the ice-making cycle and de-icing cycle, the ice-making coolers 7-1, 7-2, 7-3, and 7-4 are filled with frozen heat storage liquid. The amount of ice produced is expressed as volumetric expansion. Furthermore, since the moisture in the heat storage liquid freezes, the concentration of the enclosed heat storage liquid increases as the freezing progresses (as the amount of ice produced increases). From these phenomena, it is possible to easily know the amount of ice made by measuring the amount of increase in volume, and the amount of ice melted by measuring the amount of decrease in volume. Further, since the concentration of the heat storage liquid can be easily determined by measuring the specific gravity, the amount of ice made and the amount of ice melted can also be determined by an increase or decrease in the specific gravity.

Further, the refrigerant switching valves V1 to V4 are opened and closed based on the pressure difference between the internal pressure of the ice making cooler and the discharge port of the compressor 2, but the hot gas valves V5 to V8 and the on-off valve V
9 to V13 can also be configured to similarly open and close using the refrigerant pressure difference.

[0024]

[Effects of the Invention] As explained above, according to the present invention, the following excellent effects can be obtained. (1) Since the ice-making cycle and de-icing cycle are switched directly based on the ice production volume of the ice-making cooler, it is possible to prevent under- or over-production of ice. Can prevent ice damage.

(2) Furthermore, by operating the refrigerant pump during deicing operation, reliable deicing can be achieved by uniform heating.

(3) Furthermore, by using high temperature refrigerant discharge gas and condensed refrigerant liquid together as a heat source for deicing, it is possible to perform deicing efficiently in a short time.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the system configuration of an ice-making apparatus that is an embodiment of the present invention.

[Explanation of symbols]

1 Ice cooler 2
Compressor 3
Condenser 4-6
Refrigerant piping 7-1 to 7-4
Ice making coolers 8-1 to 8-4 Ice making sections 9-1 to 9-4 Spray pipes 10-1 to 10
-4 Refrigerant spray pumps 11-1 to 11-4 Float valves 12-1 to 12-4 Refrigerant piping 13-1 to 13-4 Three-way solenoid valve 14 Refrigerant piping 15
Refrigerant piping V1 to V4
Refrigerant switching valve V5-V8
Hot gas valve V9~V13 Open/close valve

Claims (4)

[Claims] [Claim 1] Equipped with an ice-making heat exchanger, a condenser, and a compressor, these devices are connected by refrigerant piping through which refrigerant passes,
The ice-making section of the ice-making heat exchanger has a shell-and-tube type in which a plurality of tubes are arranged horizontally, and ice is made in the tubes.The ice-making section of the ice-making heat exchanger is divided into several blocks. When at least one of the above is used as a de-icing cycle, the other is used as an ice-making cycle so that the ice-making cycle and the de-icing cycle can be performed at the same time. ,
In an ice making device for ice thermal storage configured to stop the heat storage liquid and seal the heat storage liquid in a tube, the ice generated from the compressor in the ice making device for ice thermal storage is used as a heat source for the deicing cycle. An ice making device for ice heat storage, characterized in that the refrigerant in the ice making heat exchanger is heated by using refrigerant discharge gas and the condensed refrigerant liquid of the condenser. 2. A refrigerant pressure difference generated within the apparatus is used as a driving source for a refrigerant switching valve used for switching between the ice making cycle and the deicing cycle.
The described ice making device for ice heat storage. 3. A spray pipe for spraying a refrigerant in a mist form is disposed above the plurality of tubes of the ice making section, and a refrigerant spray pump is provided for sending the refrigerant to the spray pipe,
The ice making device for ice heat storage according to claim 1 or 2, wherein the refrigerant spray pump is operated during the deicing cycle. 4. The ice making unit cycle and the deicing cycle are switched by measuring the amount of ice made and the amount of ice melted in each heat exchanger.
The described ice making device for ice heat storage.