JPH0636432Y2 - Ice heat storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an ice heat storage device necessary for producing cold water to be sent to a heat exchanger used for air conditioning of a building.

[Conventional technology]

In recent years, in the air conditioning field, an ice heat storage air conditioning system has been adopted in order to reduce running costs by using cheap nighttime electric power and to reduce the capacity of heat source equipment by averaging loads.

By the way, as a conventional ice heat storage device which is the main body of the ice heat storage air conditioning system, for example, a device as shown in FIG. 3 is used.

This ice heat storage device 31 has an ice storage unit directly below a flake ice machine (hereinafter referred to as "ice making machine") 34 installed in the upper part of the room.
An ice heat storage tank 32 in which the 32i and the water storage section 32w are integrally combined in the vertical direction
The cold water W is sent to the ice making machine 34 from a part of the lower end of the side wall 32s of the ice heat storage tank 32 by the cold water pump 37, while it is pumped out from the other part of the lower end by the water feed pump 38. The cold water W is used for cooling in a heat exchanger 35 for an air conditioner (not shown), and then sent to the ice making machine 34. Reference numeral 50 is a refrigerating device, which sends the refrigerant R to the ice making machine 34 via the refrigerator 51, the condenser 52 and the expansion valve 53.

As shown in FIG. 4, the ice-making piece machine 34 is provided with a fixed evaporator 43 on the inner surface of a rising cylindrical body 41 via a heat insulating layer 42, and the inner surface of the cylindrical inner wall 44 of the ice-making surface 34 is a grounded ice surface. It is 45. An ice scraper 47 is attached to the rotor 46 provided on the center line of the circle forming the inner wall 44, and the ice scraper 47 is rotated through the axis of the rotor 46. A fountain tool 48 located on the upper rear surface for spraying cold water W onto the freezing surface 45.
It is configured with.

Therefore, the cold water W sprayed from the fountain tool 48 onto the polishing ice surface 45 cooled by the evaporation of the refrigerant R in the evaporator 43 becomes an ice layer and the cutter of the ice scraper 47 as the rotor 46 rotates. Is scraped off and becomes ice chips F. And this ice piece F
Falls in the shape of a curtain, slides down on the umbrella-shaped guide plate 49, and falls from the outer periphery to the ice heat storage tank 32.

It should be noted that cold water W is put on the ground ice surface 45 after the ice pieces F are scraped off.
Is immediately sprayed, so that an ice layer is formed by the time the cutter comes around next, so the ice pieces F can be scraped off continuously.

By the way, the falling ice pieces F are stored in the water storage section 32w of the ice heat storage tank 32.
It falls on the surface of the water stored in and accumulates in the ice storage section 32i successively, but as the weight increases, it sinks from below to below the water surface and is melted in the stored water to cool the stored water. The cooled cold water W sinking downward is again pumped up by the cold water pump 37 to the ice making machine 34 and jetted to freeze the ice.

Then, these operations are repeated.

[Problems to be solved by the device]

Since the conventional ice heat storage device is configured as described above,
I can't store the ice heat well because the ice pieces rise up.

Usually, the amount of ice produced = the amount of cold heat storage = the amount of stored water reduced. Therefore, the amount of ice pieces produced is adjusted by controlling the cold water pump with a water level detection sensor that detects the amount of water. However, with this device, even if water can quickly dissolve the heat stored in the ice, the floating ice not only acts as a brake for the ice pieces falling from above, making it difficult to melt, but also Since a mixed layer is formed, the water surface is not constant even for the same amount of ice pieces, and adjustment control is difficult.

Further, since the ice storage layer and the water storage unit are integrally formed in the upper and lower sides of the ice heat storage layer, the ice storage layer has a high height and requires a height corresponding to the installation location, and the installation location is limited.

The present invention has been made in view of the above circumstances, and provides an ice heat storage device which has a high ice storage efficiency, can determine a cold heat storage amount by a water level detection sensor, and has a low ice storage tank height. With the goal.

[Means for Solving the Problems]

The ice heat storage device according to the present invention comprises an ice storage container having an opening at the bottom of a tubular body, and a cold water tank provided as a separate body below the ice storage container.
An ice making machine provided above the ice storage container, a heat exchanger for an air conditioner, and a sprinkler provided at an upper part inside the ice storage container are respectively arranged, and required pumps and pipes are provided. Needless to say, a refrigerating device for sending the refrigerant to the ice maker is attached.

[Operation] In the ice heat storage device according to the present invention, the ice piece that has fallen from the ice making piece machine has a small opening provided at the bottom of the ice storage container.
Furthermore, it can be piled up and stored in the air without falling. Then, the water sprayed from the sprinkler melts the ice pieces to become ice water, drops from the lower opening, enters the cold water tank below, and collects from the bottom. This cold water is pumped up by the ice making pump and supplied to the ice making machine, and at the same time it is also drawn up by the water sprinkling pump, exchanging heat with the refrigerant of the air conditioner in the heat exchanger to raise the temperature, and then from the water sprinkler to the inside of the ice storage container. Is poured into. At this time, since ice pieces do not coexist on the water surface in the cold water tank, the correct water level is always displayed.
The decrease in the water level, that is, the amount of water reduction corresponds to the amount of ice making, that is, the amount of stored water. Therefore, the water level detection sensor can control the capacity of the ice maker.

〔Example〕

 An embodiment of the present invention will be described below with reference to FIG.

The ice heat storage device 1 according to the present embodiment includes an ice storage container 2 having an open bottom whole surface opening 2N, a cold water tank 3 separately installed below the ice storage container 2, and an ice making machine 4 provided above the ice storage container 2. , A heat exchanger 5 for the air conditioner AHU, and a ring-shaped water sprinkler 6 provided on the inner circumference of the upper portion of the ice storage container 2, respectively, and the cold water tank 3 and the ice making piece machine 4 have an ice making pump 7. Further, the cold water tank 3 and the sprinkler device 6 are connected to each other via pipes via the sprinkler pump 8 and the heat exchanger 5.

The refrigerant R is sent to the ice making piece machine 4 via the refrigerator 51 to make ice. Reference numeral 12 is a water level detection sensor provided in the cold water tank 3.

With the above-mentioned configuration, in the ice heat storage device 1, the ice created in the ice making piece machine 4 is scraped off to become the ice piece 9,
It drops into the ice storage container 2, is piled up high on the opening 2N and is stored in the air. Water sprayed from the sprinkler 6 there
10 is poured onto the accumulated ice pieces 9 and melts the ice pieces 9 while being sewn in the gap and descends to become cold water 11, which is dropped from the opening 2N and enters the cold water tank 3 toward the bottom. Collect from.

This cold water 11 is pumped up by the ice making pump 7 and supplied to the ice making piece machine 4 to freeze the ice, while it is also pumped up by the water sprinkling pump 8 and exchanges heat with the refrigerant of the air conditioner AHU in the heat exchanger 5 to raise the temperature. It becomes 10 and is sent to the sprinkler 6 and poured into the ice storage container 2. Since this water 10 has a slightly high temperature, it is easy to melt the ice pieces 9.

At this time, since the ice pieces 9 do not coexist on the water surface of the cold water tank 3,
Since the correct water level is always shown, the decrease in the water level, that is, the reduced water amount, matches the ice storage amount of the ice pieces 9. Therefore, it is possible to accurately control the capacity of the ice shaving machine 4 by the water level detection sensor 12.

Next, another embodiment of the present invention will be described with reference to FIG.

In the ice heat storage device 21 in this embodiment, the structure of the building is used as a cold water tank, and as shown in the figure,
A table-making piece machine 24 and an ice storage container 22 are installed in the basement B1 below the first floor 1F. The other pumps and pipes are almost the same as those in the above-mentioned one embodiment, and are not shown.

Then, the cold water 11 dropped from the opening 22N of the ice storage container 22 is
In response to this, a funnel 25 for collecting water and dropping it into the underground cold water tank 23 is provided through the slab S.

A plurality of underground cold water tanks 23 can be provided for each required section of the building foundation, are kept warm by the heat insulating material 26, and are linked to each other by the ventilation pipe 27 and the communication pipe 28 penetrating the partition wall K. Has been done.

The method of use of this embodiment is almost the same as that of the above-mentioned one, but the feature is that the normally empty foundation part is used, which not only saves significant installation space. Alternatively, the amount of cold water held can be increased as desired. Further, if the cold water pipe is led from the funnel 25, the cold water tank 23 can be provided at an arbitrary place.

[Effect of device]

As described above, according to the present invention, since the opening is provided at the bottom of the ice storage container and the cold water tank is provided separately,
Not only can the overall height of the floor installation part be lowered, but the building foundation can also be used, so the amount of cold water held can be expanded, and the installation space is not restricted, and the installation space can be significantly reduced. You can save.

In addition, since the water storage container stores heat in the air of only ice pieces, the volume can be effectively used, the storage efficiency of ice can be improved, and since water is not stored, the container itself does not need to have a pressure resistant structure. .

Furthermore, since the water level of the cold water tank can always detect the correct value, it is possible to accurately grasp the heat storage amount corresponding to the reduced water amount,
Based on this, it becomes possible to accurately control the ice making capacity.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an ice heat storage device according to the present invention, FIG. 2 is a schematic configuration diagram showing another embodiment of the same, and FIG. 3 is equivalent to FIG. 1 of a conventional example. FIG. 4 and FIG. 4 are cross-sectional views of essential parts of the ice making machine. 1,21 …… Ice heat storage device 2,22 …… Ice storage container 2N, 22N …… Opening 3,23 …… Cold water tank 4,24 …… Flake ice machine 9 …… Ice pieces

Claims (1)

[Scope of utility model registration request] 1. An ice heat storage device for storing ice heat using ice pieces, comprising a tubular ice storage container having an opening at the bottom immediately below a flake ice making machine, and a separate body below the container. An ice heat storage device characterized in that a cold water tank is provided.