JPH0721344B2 - Ice making drum unit - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ice making drum unit used for cold heat storage of heat source water for air conditioning.

(Background of the Invention and Prior Art) In a heat storage water tank installed to store heat source water for air conditioning of a building, latent heat can be stored by making a part of the water in the heat storage water tank into ice. The amount of heat storage can be increased. In addition, if this ice making is performed by using electric power at night and the latent heat of this ice is used as a cold heat source for cooling during the daytime, it will be useful in reducing running costs.

Conventionally, in order to perform such ice heat storage, an ice making device using an ice making refrigerator is separately installed, and an ice mass produced by this ice making device or a mixture of ice fine particles (ice flakes) and water (sharppet) It is known to supply water to the heat storage water tank, and to install a pipe for ice making in the heat storage water tank to condense water around the pipe.

(Problems to be solved by the invention) When the water in the water tank is made into ice, the method of sending the water in the water tank to the ice making device outside the tank and making it into ice is There is a problem in that large-scale equipment is generally required because it must be transported in between.

When an ice making pipe is installed in the water tank to condense the water in the water tank around the pipe, there is a limit to increasing the surface area of the pipe, and the ice once formed on the pipe surface grows further. Since there is a limit, it is necessary to lengthen the extension distance of the pipe in the water tank or to install a large number of pipes, which reduces the volume of water stored in the tank by that amount, and the equipment cost becomes excessive. There is a problem that high ice making efficiency cannot always be obtained.

Such a problem can be solved if the water in the heat storage water tank can be appropriately and appropriately made into ice without modifying the existing heat storage water tank itself or installing a special ice making device. The present invention is intended to solve this problem.

(Means for Solving Problems) The present invention includes an inlet header pipe line to which a refrigerant outward pipe is connected,
It consists of an outlet header pipe to which the refrigerant return pipe is connected, and a number of independent parallel heat transfer pipes connected between the inlet header pipe and the outlet header pipe, and each heat transfer pipe is An ice making drum with both ends opened, in which a refrigerant pipe having a narrow pipe portion with a narrow pipe diameter at the connection to the inlet header pipe is provided in the drum wall, and the outside diameter is smaller than the hole diameter of the manhole. Provided is an ice making drum unit in which a scraping blade for scraping off ice generated on the inner surface of a drum is supported below a unit supporting stand having a diameter larger than a hole diameter of a manhole installed in a ceiling plate of a heat storage water tank. In particular, the present invention provides an ice making drum unit characterized in that a part of the refrigerant of the existing refrigerator is circulated in the refrigerant pipe of the ice making drum.

The ice-making drum for constituting the ice-making drum unit of the present invention uses a clad plate type ice-making drum of which both ends are open, in which a large number of pipe passages for passing a refrigerant are formed between two stacked metal plates. be able to. In order to manufacture this clad plate type ice-making drum, two metal plates are superposed on each other, and the in-planes of the plates are electro-welded to form a large number of adjacent linear welded parts with a predetermined gap. Forming the linear weld of the metal plate, welding both end faces of the metal plate to each other to form a cylindrical drum with openings at both ends, and non-welding gap between the metal plates sandwiched by the adjacent linear welds. The process of supplying a high-pressure gas to expand the non-welding gap to form a large number of pipe lines between the metal plates can be easily performed.

On the other hand, the scraping blades for constructing the ice making drum unit of the present invention are for scraping off the ice generated on the wall surface of the ice making drum immersed in the tank, which is formed along the inner surface and / or the outer surface of the drum. It consists of a blade that makes a circular motion. The object of the present invention can be achieved even if the scraping blades are provided so as to circulate only on the inner surface of the drum, but in some cases, they may be provided so as to circulate on the outer surface of the drum. In any case, it is preferable that the scraping blade is supported by the rotating shaft provided at the center of the drum.

The ice making drum of the present invention causes the drum itself to function as an evaporator of a refrigeration cycle by supplying a refrigerant to a refrigerant pipe provided in the drum wall. The function can be exhibited by using it. That is, in a normal building in which a heat storage water tank is installed, a refrigerator is installed to obtain a cooling heat source for cooling, but a part of the refrigerant in the refrigerator installed for cooling operation or cold water heat storage is used in the refrigerator. It can be used for the ice-making drum unit of the present invention after being taken out of the container. For example, in a normal single-body closed type turbo refrigerator, a part of the refrigerant sent from the refrigerator condenser to the refrigerator cooler during its operation is sent to the motor section or the purge condenser by the refrigerant pump. The liquid refrigerant is taken out of the refrigerator from the circulation path of the liquid refrigerant and sent out to the drum refrigerant pipe of the ice making drum unit of the present invention, and after the gas refrigerant is evaporated by the ice making drum, the gas refrigerant is again fed to the refrigerator condenser section by the refrigerant gas blower. It should be returned. As a result, the ice making drum unit of the present invention can be operated without a new refrigerator.

The present invention will be specifically described below with reference to examples.

(Embodiment) FIG. 1 shows an embodiment of an ice making drum unit of the present invention, wherein 1 is a heat storage water tank, 2 is a refrigerator, and 3 is a controller.

The heat storage water tank 1 is an ordinary heat storage water tank installed to store heat source water for air conditioning of a building, and is divided into a large number of small water tanks 5 by a partition wall 4 and through a communication hole 6 provided in each partition wall 4. Heat source water flows through each small water tank 5 with directionality. In the present invention, the ice making drum unit 7 according to the present invention is immersed in water in a part or all of the small water tank of such a normal heat storage water tank 1. This ice making drum unit 7 is installed so that its functional part is immersed in water by using a manhole 9 usually installed on a ceiling plate 8 constituting the heat storage water tank 1.

The details of the ice making drum unit 7 will be described below with reference to FIGS. 2 to 7.

FIG. 2 shows the whole ice making drum unit 7 of the present invention, 10 is an ice making drum, 11 is a scraping blade, 12 is a unit supporting stand, 13 is a rotary shaft for rotating the scraping blade, 14 is a speed reducer, Reference numeral 15 is a motor, 16 is a refrigerant forward pipe, and 17 is a refrigerant return pipe.

The unit support base 12 is a plate having a diameter larger than the hole diameter of the manhole 9 shown in FIG. 1, and a plurality of functional parts including an ice making drum 10 and scraping blades 11 are suspended below the support base 12. While supporting via the member 18 and the rotary shaft 13,
The speed reducer 14 and the motor 15 are supported on the support base 12. Further, the support frame 12 has a refrigerant outward pipe 16 and a refrigerant return pipe.
There is a hole through which 17 passes. The outer diameter of the ice making drum 10 is smaller than the hole diameter of the manhole 9. Therefore, the ice making drum 10 can be lowered from the manhole 9 and immersed in water, and the support base 12 serves as a board for closing the manhole 9.

FIG. 3 is a cutaway perspective view of the front half of the ice making drum showing the mounting relationship between the ice making drum 10 and the scraping blades 11. As shown in the drawing, the ice making drum 10 of the present invention has a cylindrical shape with openings at both ends, and a large number of refrigerant conduits 20 are provided in the peripheral surface material itself forming the drum 10. The refrigerant pipe 20 is formed between two plates of two metal plates (metal plate a and metal plate b shown in FIG. 4 described later) that are superposed on each other. The refrigerant is supplied from the refrigerator 2 shown in FIG. The scraping blade 11 is installed so as to orbit the inner peripheral surface of the drum 10. That is, the scraping blade 11 is attached to the rotary shaft 13 installed at the center of the drum 10, and the end edge of the scraping blade 11 has a slight clearance with the inner surface of the drum 10 (the inner surface of the portion where the refrigerant pipeline 20 exists). It is designed to orbit.

The drum 10 is suspended by a suspending member 18 with its axis vertical, but by a coupling 21 (two upper and lower places in the illustrated example) loosely fitted to the rotary shaft 13 and a support rod 22 extending from this coupling 21. The relative distance between the drum 10 and the rotary shaft 13 is kept constant (the positions of both are fixed so that the rotary shaft 13 is located at the center of the drum 10). In use, since the coupling 21 is attached to the rotary shaft 13 in a loosely fitted state, the rotary motion of the rotary shaft 13 imparted by the motor 15 is not transmitted to the drum 10, and the drum 10
Is stopped at the stop position by the hanging member 18.

The ice making drum 10 of the present invention has one feature in that a large number of refrigerant pipes 20 are formed between two metal plates.
The details will be described with reference to FIGS.

FIG. 4 is a perspective view of the inside of the drum showing the ice making drum 10 in a developed state. As shown, the ice making drum 10 of the present invention is
A large number of refrigerant conduits are formed between the two metal plates a and b which are superposed. This refrigerant line is an inlet header line formed vertically on one end of the plate.
25, an outlet header conduit 26 formed longitudinally at the other end of the plate, and a number of parallel independent heat transfer conduits connected between the inlet header conduit 25 and the outlet header conduit 26 20 ', and each heat transfer pipe 20' is a thin pipe part whose pipe diameter is narrowed at its connection to the inlet header pipe 25.
Have 27. The thin tube portion 27 serves as a throttle valve. The inlet header pipe line 25 is connected to the refrigerant outward pipe 16, and the outlet header pipe line 26 is connected to the refrigerant return pipe 17. The cylindrical drum is formed by welding both edges of metal plates to each other. Reference numeral 28 in FIG. 4 shows this weld.

FIG. 5 is a diagram showing a linear welded portion pattern for forming a refrigerant pipe line between both metal plates a and b. That is, the metal plates a and b are superposed on each other, and a continuous linear welded portion having a pattern as shown in the drawing is formed on the flat surfaces of the metal plates a and b by electric resistance welding such as electron beam welding. More specifically, gaps are formed between the adjacent linear welded portions for forming the inlet header pipe line 25, the outlet header pipe line 26, the heat transfer pipe lines 20 ′, the thin pipe parts 27, and the like. Form an open linear weld pattern.

As described above, in manufacturing the ice-making drum according to the present invention, first, two metal plates are overlapped with each other, and the metal plates are electrically welded to each other so that a predetermined gap is formed between the adjacent linear welded portions. Forming a number of linear welds spaced apart.

Then, by welding both edges of the metal plates to each other to form a cylindrical drum with upper and lower end openings, a non-welding gap between the metal plates sandwiched between adjacent linear welds (inlet header pipe line 25, outlet Header line 26, each heat transfer line
High-pressure gas is supplied to the gaps (20 ', narrow tube portions 27, etc., which become the respective conduits) to expand the non-welding gaps. In the illustrated linear weld pattern, the inlet header pipe line 25, the outlet header pipe line 26, the heat transfer pipe lines 20 ', and the non-welding gaps corresponding to the thin pipe parts 27 form one closed circuit communicating with each other. So
By providing a high-pressure gas inlet at one location of this closed circuit and supplying high-pressure gas into the closed circuit from this, it is possible to expand into each pipe line shape. This expansion step is preferably carried out by setting a drum, which has the above-mentioned pattern and is welded at both ends, in a mold. As a result, the refrigerant pipeline can be formed accurately.

FIG. 6 is a partial cross-section of the cross-sectional view taken along the line VI-VI of FIG. 5 after expansion of the thin tube portion 27, and FIG. 7 is a heat transfer line 20 taken along the line VII-VII of FIG. 7 shows a partial cross section of the ′ after expansion. In FIGS. 6 to 7, a is a cross section of one of the linear welds forming the pipeline, and B is a cross section of the other weld of the linear welds forming the pipeline. In the portion, the metal plates a and b are welded.

In the drum 10 according to the present invention, since the refrigerant pipes are formed between the metal plates a and b, the metal plates on both sides forming the refrigerant pipes serve as heat transfer surfaces, and the space between the refrigerant pipes is Since the metal plate portion existing continuously with the pipe portion plays the role of the heat transfer fin, the heat exchanger has a very high heat exchange efficiency. Moreover, as described above, the manufacturing can be easily performed.

In the present invention, an ice making drum unit 7 is constructed by attaching the scraping blades 11 to the ice making drum 10 having the above-described configuration as shown in FIG. 2, and the ice making drum unit 7 is formed in a part or all of the small water tank of the heat storage water tank 1. The heat source water in the small water tank is partly made into ice, and at that time, each ice making drum 10 is made to act as an evaporator of a refrigerant in order to function as an ice making machine. As a refrigerant for this purpose, a refrigerant circulating in an existing refrigerator can be used.

The details will be described below with reference to FIG.

In FIG. 1, a refrigerator 2 is a single-body closed turbo refrigerator installed for air conditioning of a building in which the heat storage water tank 1 is installed, and a range indicated by a dashed line indicates an existing refrigerator configuration. In this refrigerator 2, 30 is a cooler (evaporator), 31
Is a condenser, 32 is a compressor, 33 is a drive motor, 34 is a vane motor, 35 is an oil pump transmission device (accelerator), 36 is an impeller, and 37 is a purge condenser. In a normal turbo refrigerator having such a configuration, a part of the liquid refrigerant is taken out of the machine by the refrigerant pump 38 and is cooled again by the auxiliary cooling pipe 39 and then sent to the motor 33 as a coolant or a refrigerant pump. It is configured to be directly circulated from 38 to the purge condenser 37.

In the present invention, a new refrigerant main outflow pipe 41 is connected to the liquid refrigerant pipeline that is once taken out of the machine and returned to the machine, more specifically, to the discharge side pipeline 40 of the refrigerant pump 38. An electric valve 42 is attached to the refrigerant main forward pipe 41. This refrigerant main forward pipe
41 is installed near each ice making drum unit 7 installed in the small water tank of the heat storage water tank 1, and the refrigerant main return pipe 43 is connected from each ice making drum unit 7 to the condenser 31 of the refrigerator via the electric valve 44. Then, the refrigerant outward pipe 16 of each ice making drum unit 7 is connected to the refrigerant main outward pipe 41 via the control valve 45, and the refrigerant return pipe 17 of each ice making drum unit 7 is connected to the refrigerant main return pipe 43. A refrigerant gas blower 47 is installed on the downstream side of the refrigerant main return pipe 43 (more downstream than the position where the refrigerant return pipe 17 of the most downstream ice making drum is connected to the refrigerant flow). If necessary, a heat exchanger 48 is connected to the main refrigerant return pipe 43 between the refrigerant gas blower 47 and the condenser 31 of the refrigerator to recover the heat contained in the gas discharged from the blower 47 and reduce the load of the refrigerator. Reduce.

In this way, the control pipe 3 is installed after the refrigerant pipe connecting the circulating refrigerant pipe 40 of the existing refrigerator 2 and the ice making drum 10 of each ice making drum unit 7 is installed. This control panel 3
Is the motor-operated valve 50 of the circulating refrigerant line 40 of the refrigerator 2 and the refrigerant main forward pipe 4
The motor-operated valve 42 on the delivery side of 1 and the motor-operated valve 44 on the return side of the refrigerant main return pipe 43 are opened and closed, and the refrigerant gas blower
Start / stop control of 47 and refrigerant outflow pipe of each ice making drum unit 7
The opening degree of the control valve 45 installed in the 16 is controlled.

According to the ice heat storage device having the above configuration, the refrigerant pump 38 of the refrigerator 2 is operated, the motor-operated valve 50 is closed, and the motor-operated valves 42 and 44 are operated.
If the refrigerant gas blower 47 is operated by opening the
The liquid refrigerant in the refrigerator 2 is the drum of each ice making drum unit 7.
10, the liquid refrigerant is squeezed in the thin tube portion 27 of each drum 10 described in FIG. 4, and is gasified and evaporated in the refrigerant pipe 20 to forcibly cool the water in the water tank to make ice. You can At that time, scraping blades of each ice making drum unit 7
By rotating 11 the ice generated on the inner surface of the drum 10 is scraped off from the drum 10 and transferred to the water,
Float from the top opening of 10 toward the water surface. On the other hand, ice is also generated on the outer surface of the drum 10. This is because after the ice has grown to a certain thickness in water, this ice layer acts as an adiabatic layer and stops its growth, promoting ice formation on the inner surface. become. In FIG. 1, the layer indicated by 52 indicates an ice layer formed on the outside of the drum. An ice pool may be formed by a mesh, canvas or the like so that the ice generated by the ice making drum unit 7 is not swept away by the water flow. The refrigerant gasified by the drum 10 of each ice making drum unit 7 is returned to the refrigerator 2 by the refrigerant gas blower 47 (refrigerator 2
(Returned to the condenser unit 31 of No. 3) is as described above.

In the illustrated embodiment, the ice making drum 10 is provided with the thin tube portion 27 which acts as a throttle valve, but a control valve 45 provided in the refrigerant outward pipe 16 instead of or in addition to the thin tube portion 27 is shown.
May function as an expansion valve. Further, although the scraping blade has shown only the example in which it circulates inside the drum, it may have a structure in which it circulates in the outside of the drum or a structure in which it circulates inside and outside the drum. Further, the scraping blade does not necessarily have to be composed of one sheet, and a plurality of blades may be installed on the rotary shaft 13.

(Operation and Effect) The ice making drum unit 7 of the present invention can be easily installed by using the manhole on the ceiling of the existing heat storage water tank. Therefore, without modifying the existing heat storage water tank itself,
Further, an ice making device with high ice making efficiency can be easily configured without installing a special ice making device.

By immersing each ice making drum unit 7 in the heat storage water tank 1, the ice generated on the surface of each ice making drum 10 is scraped off by the scraping blades 11 and floats in water.
Ice heat can be stored when fine ice particles float near the surface of the water. Since the flow of water is not completely shut off when the fine particles are suspended, the flow of water between the small water tanks is not stopped. Therefore, since the water flows into the heat storage water tank during the ice heat storage operation or during the cooling operation using the cold heat, the original function of the heat storage water tank is not stopped.

Further, since a large number of parallel refrigerant pipes are formed on the surface of the ice making drum of the present invention, the metal plate itself serves as a fin, and the ice making on the entire surface of the drum is highly efficient. It can be performed. Moreover,
Since the entire drum is configured as a direct expansion evaporator with a thin tube near the inlet of each refrigerant line, there is no need to install an expansion valve in the middle of the refrigerant outward line and piping is easy. And the whole structure of the ice making drum unit is simple,
In particular, it is possible to easily make ice by using the refrigerant that the existing refrigerator has in the refrigerator.

Therefore, when adding ice heat storage equipment for building air conditioning, the installation work is easy, the equipment cost of the new installation can be very low, and the running cost is also low, which is a beneficial effect. .

[Brief description of drawings]

FIG. 1 is an equipment arrangement system diagram showing an embodiment of an ice heat storage device of the present invention, FIG. 2 is an overall perspective view of an ice making drum unit according to the present invention, and FIG. 3 is a drum and a scraping blade of the ice making drum unit of FIG. A front half cutaway perspective view for explaining a portion, FIG. 4 is a developed perspective view of a drum of an ice making drum unit, FIG. 5 is a linear weld pattern pattern diagram for manufacturing the drum, and FIG. FIG. 7 is an enlarged schematic cross-sectional view showing the cross-sectional view taken along the line VI-VI of the drawing after expansion, and FIG. 7 is VII-VII of FIG.
FIG. 7 is an enlarged schematic cross-sectional view showing a cross-sectional view taken along a line arrow after expansion. 1 …… Heat storage water tank, 2 …… Existing refrigerator, 3 …… Control panel, 4 …… Partition wall, 5 …… Small water tank, 6 …… Communication hole, 7 …… Ice making drum unit, 8 …… Cooling water storage tank ceiling Plate, 9 …… Manhole, 10 …… Ice-making unit drum, 11 …… Scraping blade, 12 …… Supporting stand, 1
3 …… Rotary shaft, 15 …… Motor, 16 …… Refrigerant forward pipe, 17 …… Refrigerant return pipe, 18 …… Suspension member, 30 …… Cooler part of refrigerator, 31
…… Refrigerator condenser part, 33 …… Refrigerator motor part, 37 …… Refrigerator purge condenser part, 38 …… Refrigerant pump, 40 …… Refrigerator refrigerant circuit, 41 …… Refrigerant main forward pipe , 43
...... Refrigerant main return pipe, 45 …… Control valve, 47 …… Refrigerant gas blower, 5
2 …… An ice block that grew on the drum surface.

Claims (2)

[Claims] 1. An inlet header pipe line to which a refrigerant outward pipe is connected, an outlet header pipe line to which a refrigerant return pipe is connected, and parallel to each other communicated between the inlet header pipe line and the outlet header pipe line. And a large number of independent heat transfer pipes,
Each heat transfer pipe has a refrigerant pipe that has a narrow pipe with a narrowed pipe diameter at the connection to the inlet header pipe, and the inside of the drum wall has an outer diameter smaller than that of the manhole. A drum and a scraping blade for scraping off the ice generated on the inner surface of the ice making drum are supported below a unit support frame having a diameter larger than the diameter of the manhole installed in the ceiling plate of the heat storage water tank. Ice making drum unit. 2. The ice making drum unit according to claim 1, wherein a part of the refrigerant of the existing refrigerator is circulated in the refrigerant pipe line of the ice making drum.