JP4475585B2 - Method and apparatus for filling ice slurry into cooling panel - Google Patents

Description

  The present invention relates to an ice slurry produced by making a latent heat storage brine into an internal space of a metal thin plate storage heat storage cooling panel provided in a refrigerator, a refrigerator, a mobile refrigerator, a refrigerator refrigerator, or the like ( The present invention relates to a filling method and an apparatus for efficiently and efficiently filling dynamic ice) to a target ice filling rate.

  A regenerative cooling panel installed on the inner wall of a container to be cooled, such as a refrigerator, a refrigerator, a mobile refrigerator, a refrigerator-freezer, or the like, is usually a thin aluminum or stainless steel box, or a copper pipe, etc. And has an internal space for storing the latent heat storage brine, and must be made as thin as possible so as not to reduce the volume of the cargo compartment such as a cold storage. In order to increase the cold insulation capacity in the internal space of the cooling panel, it is necessary to fill the ice slurry produced by making the latent heat storage brine with high density, and as a filling method, the internal space is in an empty state. The method of filling with a high ice filling rate IPF is the simplest method.

  However, when the ice slurry is filled into an open air cooling panel with an ice filling rate of 35% or more, the fluidity in the cooling panel is poor, and the following problems occur and the ice slurry cannot be sufficiently filled. Ice cannot be filled to the corner inside the cooling panel. The ice clogged at the inlet of the cooling panel gets in the way of filling and overflows. The height of the filled ice is not uniform and overflows.

For this reason, when the ice slurry is filled into the cooling panel at a high ice filling rate, the cooling panel must be sealed and pushed in with an excessive pressure.
In FIG. 10 and FIG. 11 of Patent Document 1 (Japanese Patent Laid-Open No. 2002-71248), a latent heat storage material is used as a base from a refrigerated container base 21 to a hermetic type cold insulated storage container 27 provided in the refrigerated container vehicle 22. A system for supplying a frozen ice slurry is disclosed. In this system, a heat storage tank 23 provided in the refrigerated container base 21 and a cold storage heat storage enclosure 27 are connected by piping, and the ice slurry stored in the heat storage tank 23 is pumped into the cold storage storage enclosure 27 by a pump. is doing.

JP 2002-71248 A

However, when ice-slurry is filled in a sealed heat storage agent enclosure disclosed in Patent Document 1 at a high ice-filling rate, the viscosity of the ice slurry increases as the ice-filling rate increases. The ice slurry must be pushed in, so the strength of the cooling panel etc. must be increased.
Further, since the ice for cooling the inside of the cold insulation chamber is melted after filling, there is a problem that a certain amount of ice is consumed before the object to be cooled is put into the cold insulation chamber and cooled.

  In view of the problems of the prior art, the present invention can maintain fluidity and can smoothly fill the corners inside the cooling panel even when the ice slurry is filled into the cooling panel at a high ice filling rate. The cooling panel does not require excessive pressure, so that it is not necessary to increase the strength of the cooling panel, and the cooling slurry charging method for the cooling panel and the apparatus for carrying out the method can reduce the power of the transport pump The purpose is to provide.

The method of the present invention achieves this object.
In the method of filling the ice slurry to the target ice filling rate in the cooling panel having the internal space filled with the ice slurry generated by making the latent heat storage brine into ice,
The internal space of the cooling panel is set in an open state by an open valve that communicates with the atmosphere, an ice slurry supply part is provided on one side of the cooling panel (including the central part), and the cooling panel is provided on the other side of the cooling panel. Each has a recovery unit for recovering the latent heat storage brine stored in the internal space,
After pre-cooling the internal space of the cooling panel using the ice slurry brine,
Transition to the ice filling rate gradual increase step of the ice slurry, the inflow flow rate of supplying the ice slurry from the supply unit to the cooling panel is larger than the outflow rate of discharging the brine from the recovery unit,
The ice slurry is supplied from the supply unit to the internal space of the cooling panel while discharging the brine from the return portion while filling the internal space of the cooling panel with an ice filling rate lower than a target ice filling rate. The ice filling rate of the ice slurry is gradually increased so that the ice filling rate in the internal space of the cooling panel is set to a target ice filling rate.
The present invention also provides an ice storage tank for storing ice slurry produced by an ice making machine, an ice slurry having a filling rate controlled by an ice filling rate control unit is taken out from the ice storage tank, and ice slurry in only one direction is removed by a check valve. A one-way circulation loop system for returning the ice slurry to the ice storage tank while allowing flow; and the cooling panel connected to the one-way circulation loop system via a supply unit and a recovery unit branched from the one-way circulation loop system; With
With the open valve that allows the cooling panel to communicate with the atmosphere, the internal space of the cooling panel is open to the atmosphere,
After pre-cooling the internal space of the cooling panel using the ice slurry brine,
The inflow flow rate for supplying ice slurry from the supply pipe to the cooling panel is larger than the outflow flow rate for discharging the brine from the recovery unit,
The inside of the cooling panel is filled with the ice slurry from the supply pipe into the internal space of the cooling panel at an ice filling rate lower than the target ice filling rate, and the brine is discharged from the recovery unit. The ice filling rate of the ice slurry supplied to the space is gradually increased, and the ice filling rate in the internal space of the cooling panel is set to a target ice filling rate.

  In the present invention, since the ice slurry is filled in the internal space of the cooling panel at an ice filling rate lower than the target ice filling rate, for example, an ice filling rate of less than 35% by weight, the fluidity is sufficiently maintained. The above-described problems do not occur, and at the same time, the ice filling rate stored in the internal space of the cooling panel is increased while discharging the latent heat storage brine stored in the internal space of the cooling panel. As a result, the target ice filling rate exceeding 35% by weight can be finally obtained.

Preferably, the bottom wall of the cooling panel is formed to be inclined downward in one or both flow directions from the ice slurry supply part, and a recovery part is provided on the bottom wall on the downstream side in the inclined direction. , and greater than the gap height of the internal space of the recovery part of the gap height of the inner space formed in the cooling panel the other side of the supply portion provided in the cooling panel side, the gap height changes along the slurry flow direction It is characterized by doing so .
Preferably, the flow rate of the slurry flowing in the internal space is reduced by increasing the number of return portions provided on the other side of the cooling panel than the supply portion provided on the cooling panel side (including the central portion).

The present invention apparatus, the cooling panel having an inner space filled with the ice slurry produced by the ice making brine for latent heat storage arranged in the cooling chamber is filled with ice slurry to the cooling panel to target the ice filling rate cooling In slurry filling equipment for panels ,
The cooling panel is disposed on a ceiling portion of the cooling chamber, and an air release valve is provided on the ceiling wall side of the cooling panel to set an internal space of the cooling panel to an atmospheric pressure open state, and the cooling The bottom wall of the panel is formed so as to be inclined downward in one or both flow directions from the ice slurry supply part, and a recovery part is provided on the bottom wall on the downstream side in the inclined direction, and the cooling panel has an internal space. brine for latent heat storage are pooled and concentrated with incrementing ice slurry to be filled in the inner space while the recovery from the recovery unit from a low ice filling rate than the target ice filling rate of ice slurry to target the ice filling rate And an ice filling rate control device.

In the device of the present invention, a discharge part for discharging the latent heat storage brine from the cooling panel is provided on the bottom wall side of the cooling panel so that only the brine is taken out, and the ice slurry is filled in the internal space of the cooling panel while the same. Brine is discharged from the internal space, and is concentrated while gradually increasing the ice filling rate of the internal space of the cooling panel by the ice filling rate control device, so that the internal space becomes the target ice filling rate.
In the apparatus of the present invention, preferably, the ice filling rate control device is provided with detecting means for detecting the discharge of the brine from the discharging unit for discharging the brine and detecting that the target ice filling rate has been reached. Preferably, the cooling panel is disposed on the inner wall surface of the ceiling portion of the cold-storage vehicle.
More preferably, an ice storage tank for storing the ice slurry produced by the ice making machine, an ice slurry having a filling rate controlled by the ice filling rate control unit is taken out from the ice storage tank, and the flow of the ice slurry in only one direction by the check valve A unidirectional circulation loop system for returning the ice slurry to the ice storage tank while allowing the cooling, and the cooling panel is connected via a supply section and a recovery section branched from the unidirectional circulation loop system. To do.

The basic configuration of the device of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a thin plate-like cooling panel having an internal space filled with ice slurry, which is attached to an inner wall of a cool box or the like. 2 is a refrigerator unit that produces a sub-freezing refrigerant and supplies it to the ice maker 3, and 3 uses the cold heat of the refrigerant supplied from the refrigerator unit 2 to make the latent heat storage brine into ice to generate ice slurry. The ice making device 4 is an ice storage tank that stores the ice slurry generated by the ice making device 3.
Reference numeral 5 denotes a pipe for supplying ice slurry to the internal space on the one side of the cooling panel 1 by the pump 7, and reference numeral 6 denotes a return pipe for returning the brine from the internal space on the other side of the cooling panel 1 by the pump 8.

  9 and 10 are electromagnetic valves and ice filling rate sensors provided in the supply pipe 5, 11 is a sensor for detecting the ice filling rate in the internal space of the cooling panel 1, and 12, 13 and 14 are provided in the brine return pipe 6. Ice filling rate sensor, temperature sensor and solenoid valve. Reference numerals 15 and 16 are connection parts interposed in the supply pipe 5 or the return pipe 6, and the connection parts 15 and 16 can separate the cooling panel 1 side from the ice storage tank 4, the ice maker 3 and the refrigerator unit 2 side. To do. The connecting portions 15 and 16 have an automatic on-off valve mechanism that opens when connected and closes when disconnected.

Reference numeral 17 denotes an ice filling rate control device which detects the inflow flow rate of ice slurry and the inflow side ice filling rate from the pump 7, the electromagnetic valve 9 and the sensor 10 provided in the supply pipe 5, and from the sensor 11 in the cooling panel. The ice filling rate is detected, and the outflow flow rate of brine, the outflow brine temperature and the outflow ice filling rate are detected from the pump 8, the electromagnetic valve 14, the temperature sensor 13 and the sensor 12 provided in the return pipe 6. Based on the value, the cooling panel pre-cooling end, ice slurry filling end determination and solenoid valves 9, 14 closing operation, closing operation to prevent ice slurry from overflowing from the cooling panel, inflow flow rate and outflow flow rate balance operation Then, the ice filling rate in the cooling panel is controlled to change according to the set ice filling rate curve.
With such an apparatus configuration, the ice in the cooling panel 1 is gradually increased while filling the ice slurry from the supply pipe 5 and discharging the brine from the return pipe 6 while gradually increasing the ice filling rate of the ice slurry supplied into the cooling panel 1. Set the filling rate to the target ice filling rate.

  According to the method of the present invention, the latent heat stored in the internal space of the cooling panel while filling the internal space of the cooling panel from the supply unit provided on the panel side with an ice filling rate lower than the target ice filling rate. While discharging the heat storage brine from the return part provided on the other side of the cooling panel, gradually increasing the ice filling rate of the ice slurry supplied to the internal space of the cooling panel, and aiming at the ice filling rate of the internal space of the cooling panel By making the ice filling rate, the ice slurry can be smoothly filled into the interior space of the cooling panel.

Thus, while the ice slurry is filled into the internal space of the cooling panel, the brine is discharged on the other hand, so that the ice slurry transport pump pressure does not become excessive. In this case, preferably, the ice slurry supply pressure of the transfer pump can be remarkably reduced by making the internal space of the cooling panel communicate with the atmosphere. Therefore, there is an advantage that the strength of the cooling panel does not need to be kept high and the power of the transport pump can be reduced.
During the ice slurry filling, the cooling panel itself and the inside of the cold storage room or the cargo room to which the cooling panel is attached can be precooled, so that the ice filling rate IPF can be operated from the maximum filling state until the ice melts. Long time can be maintained.

In the present invention, preferably, before the step of gradually increasing the ice filling rate of the ice slurry, the step of precooling the internal space of the cooling panel to the vicinity of the ice slurry temperature using the brine of the ice slurry is performed. There is an advantage that all the latent heat of the ice slurry can be used for cooling the object to be cooled without melting the ice for cooling the inside of the panel.
Preferably, after the cooling panel is precooled to a state in which the internal space of the cooling panel is filled with brine in advance, the process proceeds to a step of gradually increasing the ice filling rate of the ice slurry, whereby the ice slurry liquid in the cooling panel is obtained. Since the depth becomes deeper and the flow velocity becomes slower, there is an advantage that the ice stays and hardly flows out of the cooling panel.

Preferably, in the step of gradually increasing the ice filling rate of the ice slurry, the inflow flow rate for supplying the ice slurry to the cooling panel is made larger than the outflow flow rate for discharging the brine from the cooling panel. Has the same effect as described above.
Preferably, the gap height of the internal space of the supply section provided on the cooling panel side is made higher than the gap height of the return section provided on the other side of the cooling panel, and the gap height changes along the slurry flow direction. By doing so, it is possible to prevent the ice particles from staying in the vicinity of the supply unit and obstruct the inflow of the ice slurry, and to smoothly flow the ice slurry into the cooling panel.

  Preferably, the flow rate of the slurry flowing through the internal space is reduced by increasing the number of return portions provided on the other side of the cooling panel than the supply portion provided on the cooling panel side (including the central portion). If the flow rate on the ice slurry supply side is reduced in order to reduce the flow rate of the ice slurry in the cooling panel, the ice slurry is likely to be blocked by the supply side piping. With the above configuration, the return portion is dispersed, so that the flow rate on the discharge side can be reduced while increasing the flow rate on the supply side, and the flow rate of the ice slurry in the cooling panel can be reduced. It is possible to prevent the ice from flowing out of the cooling panel while preventing the clogging.

  According to the apparatus of the present invention, a discharge part for discharging brine from the cooling panel is provided on the bottom wall side of the cooling panel, and the internal space is stored in the internal space with the cooling panel in which the slurry flows in one direction or both flow directions. Ice in the ice slurry is concentrated to the target ice filling rate by gradually increasing the ice slurry filling the internal space while discharging the latent heat storage brine being discharged from the discharge unit from the ice filling rate lower than the target ice filling rate. Equipped with a filling rate control device, it is possible to suppress the outflow of ice from the discharge section, and to smoothly control the clogging of ice slurry in the cooling panel while achieving a target ice filling rate smoothly. Can be reached.

  In the apparatus of the present invention, preferably, the ice filling rate control device includes a detecting unit that detects the discharge of the brine from the discharging unit that discharges the brine and detects that the target ice filling rate is reached. It is possible to quickly detect that the target ice filling rate has been reached, and the cooling panel is arranged on the inner wall surface of the ceiling of the cold car, effectively shielding solar radiation and the cargo compartment of the cold car. This can increase the cooling effect.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.
2 to 4 are schematic views showing the first, second, and third embodiments of the method of the present invention, respectively.

It is better to make the cooling panel attached to the cold storage etc. as thin as possible because of the limitation of the installation space. That is, it is necessary to narrow the internal space of the cooling panel. However, when that happens, there is a possibility that the ice slurry cannot be filled at a high ice filling rate.
FIG. 2 showing the first embodiment of the present invention is an embodiment in the case where ice slurry is filled into the internal space of the cooling panel arranged horizontally in the shallow bottom. In FIG. 2, reference numeral 21 denotes a cooling panel. Ice slurry 25 is supplied from a supply port 23, and brine stored inside the cooling panel 21 is discharged from a discharge port 24. Reference numeral 26 denotes ice particles contained in the ice slurry 25. In FIG. 2, the ice particles 26 are shown larger than the actual size, but this is the same in FIGS. 3 and 4 described later. Reference numeral 27 denotes an open valve for communicating the internal space 21a of the cooling panel with the large wall so that the cooling panel 21 is open to the atmosphere.

In this first embodiment, before the step of gradually increasing the ice filling rate, the internal space 21a of the cooling panel 21 is pre-cooled to near the ice slurry temperature using brine of ice slurry, and the internal space of the cooling panel is prefilled with brine in advance. After the pre-cooling to the state, the process proceeds to a step of gradually increasing the ice filling rate of the ice slurry.
In the first embodiment, in the step of gradually increasing the ice filling rate, the ice slurry is filled from the supply port 23 provided on the panel 21 side in the internal space 21a of the cooling panel at an ice filling rate lower than the target ice filling rate, While discharging the latent heat storage brine stored in the internal space from the discharge port 24 provided on the other side of the cooling panel, the cooling is performed while gradually increasing the ice filling rate of the ice slurry supplied to the internal space of the cooling panel 21. The target ice filling rate is set to the ice filling rate of the internal space of the panel.

According to the first embodiment, the internal space 21a of the cooling panel 21 is pre-cooled to the vicinity of the ice slurry temperature by using the ice slurry brine before the ice filling rate gradually increasing step, thereby cooling the inside of the cooling panel. The ice is not melted, and all the latent heat of the ice slurry can be used to cool the cool box, and the internal space of the cooling panel is preliminarily filled with brine. After that, by shifting to the step of gradually increasing the ice filling rate of the ice slurry, the ice slurry becomes deeper in the cooling panel and the flow velocity becomes slower, so that the ice stays and does not easily flow out of the cooling panel. There is an advantage of becoming.
In addition, since the air release valve 27 is provided to open the internal space 21a of the cooling panel to the atmosphere, the pump pressure for filling the ice slurry with the cooling panel does not become excessive, and therefore the strength of the cooling panel is excessive. The pump power is not excessive.

FIG. 3 shows a second embodiment of the present invention. In FIG. 3, 31 is a cooling panel, and 31 a is an internal space of the cooling panel filled with ice slurry 35. 33 is a supply port for ice slurry 35 provided at one end of the cooling panel 31, 34 is a brine discharge port provided at the other end of the cooling panel 31, 36 is ice particles mixed in the ice slurry 35, 37 Is an open valve for communicating the internal space 31a of the cooling panel with the atmosphere in order to make the cooling panel 31 open to the atmosphere.
In this embodiment, in the step of gradually increasing the ice filling rate of the ice slurry, the inflow flow rate for supplying ice slurry from the supply port 33 to the cooling panel 31 is set to be larger than the outflow flow rate for discharging brine from the discharge port 34. Features. Accordingly, there is an advantage that the flow rate of the ice slurry in the cooling panel becomes slow, and the ice stays and hardly flows out of the cooling panel. The effect of the air release valve 37 is the same as that of the first embodiment.

  FIG. 4 shows a third embodiment of the present invention. If the inflow flow rate on the ice slurry supply side is slowed down in order to slow down the flow velocity in the cooling panel, the ice slurry tends to be blocked by the ice slurry supply side piping. In this example, the cooling panel is designed so that the flow velocity in the cooling panel becomes half. That is, in FIG. 4, 41 is a cooling panel, and 41 a is an internal space of the cooling panel filled with ice slurry 45. A supply port 43 for ice slurry 45 is provided at the center of the cooling panel 41, and brine discharge ports 44 a and 44 b are provided at both ends of the cooling panel 41. Reference numeral 46 denotes ice particles mixed in the ice slurry 45, and reference numeral 47 denotes an opening valve for communicating the internal space 41a of the cooling panel with the atmosphere in order to make the cooling panel 41 open to the atmosphere.

  According to the third embodiment, the ceiling portion of the cooling panel 41 near the supply port 43 is higher than the vicinity of the discharge ports 44a and 44b, and the gap height changes along the slurry flow direction. The ice particles can be prevented from staying in the vicinity of the supply port 43, and the ice slurry can be smoothly flowed into the cooling panel, and the number of discharge ports provided on both sides of the cooling panel from the supply port 43 can be increased. The ice slurry flow rate is reduced by dispersing the slurry flow through If the flow rate on the ice slurry supply side is reduced in order to reduce the flow rate of the ice slurry in the cooling panel, the ice slurry is likely to be blocked by the supply side piping. In this embodiment, the flow rate of the ice slurry in the cooling panel can be reduced by reducing the flow rate in the vicinity of each discharge port while keeping the supply-side flow rate large. It is possible to prevent the ice from flowing out of the cooling panel while preventing the clogging.

FIG. 5 is a system diagram showing a fourth embodiment of the present invention relating to an ice slurry supply system capable of supplying ice slurry from a plurality of supply units to a plurality of cold cars.
In FIG. 5, 51 is a refrigeration unit installed on land that produces a sub-freezing refrigerant, which is sent to the ice making machine 52, and the ice making machine 52 ices the latent heat storage brine by the cold heat of the refrigerant to produce ice slurry. Is generated. 53 is an ice storage tank for storing ice slurry produced by the ice making machine 52, and 54 is a circulation pump for circulating the latent heat storage brine stored in the ice storage tank 53 to the ice making machine 52 for ice making. Reference numeral 55 denotes a circulation pipe for constantly circulating the ice slurry in the ice storage tank 53 by the supply pump 56 and the recovery pump 57. 58, by utilizing the fact that the ice content varies depending on the connecting portion of the ice intakes 55a and 55b connected to the ice storage tank 53, the circulation pipe 55 changes the inflow amount of the ice intakes 55a and 55b. A three-way valve 59 for controlling the ice filling rate of the ice slurry circulating through 55 is a check valve that allows the flow only in the direction of the arrow.

Reference numeral 60 denotes a cold car, and a cooling panel 62 is disposed on the ceiling portion of the inner wall surface of the luggage compartment 61. The cooling panel 62 has an internal space filled with ice slurry, and the object to be cooled loaded in the cargo chamber 61 is kept cool by the cold heat of the ice slurry filled in the internal space. 63 is an atmosphere release valve for communicating the internal space of the cooling panel 62 with the atmosphere.
71 is a pipe for supplying ice slurry from the circulation pipe 55 to the internal space of the cooling panel 62, and 72 is a collection pipe for collecting the brine after melting of the ice inside the cooling panel from the cooling panel 62 to the circulation pipe 55. . The connection portion of the recovery pipe 72 is provided on the inclined bottom wall side of the cooling panel 62, which is convenient for taking out only the brine. 73 is a coupler that allows the supply pipe 71 or the recovery pipe 72 to be separated from the cooling panel side and the circulation pipe 55 side, and 74 is an automatic on-off valve that has an internal valve that opens when the coupler 73 is connected and closes when the coupler 73 is disconnected. It is.

75 and 76 are ice filling rate sensors and flow meters provided in the supply pipe 71, and 77, 78 and 79 are temperature sensors, ice filling rate sensors and flow meters provided in the recovery pipe 72. Reference numeral 64 denotes a sensor for measuring the ice filling rate in the internal space of the cooling panel 62. Reference numeral 65 denotes an underground pit that temporarily stores the brine recovered by the recovery pipe 72. 83 is an electromagnetic valve provided in the supply pipe 71, and 84 is an electromagnetic valve provided in the recovery pipe 72. These devices are collected in a supply unit 82 attached to the distal ends of the supply pipe 71 and the collection pipe 72, and can be attached to and detached from the cold storage vehicle 60 by a coupler 73.
In FIG. 6, 80 receives the detection signals of the respective sensors, measures and counts the ice filling rate of the cooling panel 62 as follows, and finally controls the ice filling rate in the cooling panel 62 to a desired value. It is a control device. The following measurement count is performed by each ice filling rate control device 80 in each cooling panel 62.
Cooling panel outflow brine temperature <brine freezing temperature = end of precooling / cooling panel ice filling rate IPF [%] = (accumulated inflow heat amount−accumulated outflow heat amount) / (change in filling weight) /79.7 [kcal / kg ] × 100
・ Integrated inflow heat amount [kcal] = 79.7 × cooling panel inflow IPF [%] / 100 × cooling panel inflow flow rate [kg / min] × time interval + inflow heat amount / integrated outflow heat amount [kcal] = 79.7 × cooling Panel outflow IPF [%] / 100 × cooling panel outflow rate [kg / min] × time interval + change in outflow heat quantity / filling weight [kg] = cooling panel reference internal capacity + cooling panel inflow rate−cooling panel outflow rate) × Time interval / cooling panel ice filling rate IPF [%] ≧ desired ice filling rate = filling completed (or filling is completed by measurement with the ice filling rate sensor 64 installed in the cooling panel).

In the ice slurry supply system of this embodiment, first, the ice slurry stored in the ice storage tank 53 is circulated in the circulation pipe 55. At this time, the three-way valve 58 is controlled based on the detection value of the ice filling rate sensor 81 provided in the circulation pipe 55 so that the ice filling rate is lower than the target ice filling rate of the ice slurry supplied to the cold car 60. Each inflow amount of the ice outlets 55a and 55b is controlled.
When a large number of cooling panels 62 are filled from the circulation pipe 55 by the plurality of ice slurry supply pipes 71, the ice filling rate sensor 81 of the circulation pipe is set so that the ice filling rate of the circulation pipe 55 is constant between 15% and 20%. And the three-way valve 58.
At that time, when branching to the plurality of ice slurry supply pipes 71, it is preferable that the ice filling rate in the pipe is equally distributed, that is, the flow velocity in the circulation pipe 55 is 1 m / s or more.
Thereby, the operation | work which is filled with ice slurry in the some cooling panel 62 can be performed simultaneously.
Next, the internal space of the cooling panel 62 of the cold storage vehicle 60 that supplies ice slurry and the circulation pipe 55 are connected by a coupler 73 of a supply pipe 71 and a recovery pipe 72. Thereafter, while the ice slurry is filled from the supply pipe 71 connected to the panel 62 side into the internal space of the cooling panel 62 at an ice filling rate lower than the target ice filling rate, the brine stored in the internal space is cooled to the other side of the cooling panel. It collects in the collection pipe 72 connected to.

At that time, as shown in FIG. 6, the controller 80 controls the inflow ice filling rate, the outflow ice filling rate, the ice filling rate in the cooling panel, the cooling panel outflow brine temperature, and the cooling panel sent from each sensor to the cooling panel. Based on the detected values of the inflow flow rate and the outflow flow rate, the above-described measurement count is performed, the cooling panel pre-cooling end, the ice slurry filling end determination, the solenoid valves 83 and 84 are closed, and the ice is discharged from the cooling panel. The closing operation is performed to prevent the slurry from overflowing, and the supply pump 56 and the recovery pump 57 are operated to balance the inflow rate and the outflow rate. That is, while gradually increasing the ice filling rate of the ice slurry supplied to the internal space of the cooling panel 62, the target ice filling rate is set to the ice filling rate of the internal space of the cooling panel.
The brine recovered from the recovery pipe 72 is once discharged to the underground pit 65 or simultaneously with the supply of ice slurry, the brine is sucked by the recovery pump 57 and recovered in the ice storage tank 53.
In the present embodiment, the ice-cooled vehicle 60 is filled with the ice slurry by performing the pre-cooling process and the like performed in the first embodiment.

  According to the apparatus of the present invention, since the recovery pipe 72 is connected to the low wall surface at the lower end of the cooling panel 62, it is possible to effectively suppress the outflow of ice to the recovery pipe 72 and to control the ice filling rate control device 80. Thus, the ice slurry filled in the cooling panel 62 is concentrated while gradually increasing from the ice filling rate lower than the target ice filling rate to achieve the target ice filling rate, thereby blocking the ice slurry in the cooling panel. The target ice filling rate can be reached smoothly while effectively suppressing.

  In addition, by providing the ice filling rate control device 80 with a means (ice filling rate sensor 64) for measuring or detecting that the target ice filling rate has been reached by detecting the discharge of the brine from the discharging unit for discharging the brine, It is possible to quickly detect that the target ice filling rate has been reached, the refrigeration vehicle 60 can be quickly separated, and the cooling panel 62 is disposed on the inner wall surface of the ceiling portion of the refrigeration vehicle. Thus, it is possible to effectively shield the solar radiation and enhance the cold insulation effect of the cargo compartment of the cold car.

FIG. 7 is a graph showing the change over time of the measured values of each sansa when the present embodiment is implemented. In this case, a pre-cooling process in which only brine was circulated in the cooling panel before filling with the ice slurry was performed, and the cooling panel itself was measured in a cold state.
As can be seen from FIG. 7, the ice filling rate IPF of the ice slurry flowing into the cooling panel is gradually concentrated from zero, and the ice filling rate of the ice slurry in the cooling panel is gradually concentrated accordingly. A high ice filling rate of 35% or more has been reached.

FIG. 8 is a graph showing an actual measurement result of the pump power when the ice filling rate (conveyance IPF) of the ice slurry to be supplied is changed when the cooling panel is filled with the same amount of cold ice slurry within a predetermined time. .
In FIG. 8, the total pump power is the combined power of the conveyance side ice slurry pump power and the drain side brine pump power, the conveyance side ice slurry pump power is the pump power for supplying ice slurry, and the drain side brine pump power is , Pump power for recovering the brine in which the ice slurry has dissolved to become liquid.

From FIG. 8, it can be seen that if the transport IPF to be supplied is made small, a large amount of cold storage agent is caused to flow in with respect to the required amount of cold heat and a large amount of brine is recovered, so that the drain side brine pump power increases. In addition, if the transport IPF to be supplied is increased, a small amount of cold storage agent is required with respect to the required amount of cold heat, and the amount of brine to be recovered is small. However, the viscosity of the ice slurry increases, so the power of the transport side ice slurry pump increases. I understand.
Therefore, the method of the present invention, which increases the ice filling rate of the internal space of the cooling panel while discharging brine from the cooling panel, rather than filling ice slurry with a high ice filling rate from the beginning, reduces the total pump power. Is also effective. It can be seen from FIG. 8 that the proper transport IPF is 15 to 20% by weight.

  According to the present invention, ice slurry is efficiently and densely added to a thin plate-type regenerative cooling panel provided in a refrigerator, a refrigerator, or the like, or a plurality of refrigerator trucks with a simple and inexpensive device structure. It is beneficial to be able to implement a method and apparatus for filling an ice slurry that can be filled.

It is explanatory drawing which shows the basic composition of this invention. It is a schematic diagram which shows 1st Example of this invention. It is a schematic diagram which shows 2nd Example of this invention. It is a schematic diagram which shows 3rd Example of this invention. It is a systematic diagram which shows 4th Example of this invention which concerns on the ice slurry supply system which can supply ice slurry from several supply part with respect to several cold storage vehicle. It is a block diagram which shows the control system of the said 4th Example. It is a graph which shows a time-dependent change of the measured value of each said sunsa at the time of implementing the said 4th Example. It is a graph which shows the actual measurement result of the pump power at the time of changing the ice filling rate (conveyance IPF) of the ice slurry supplied to a cooling panel.

Explanation of symbols

21, 31, 41, 62 Cooling panel 2, 51 Refrigerator unit 3, 52 Ice maker 4, 53 Ice storage tank 5 Ice slurry supply pipe 6 Brine recovery pipe 7, 56 Supply pump 8, 57 Recovery pump 9, 14 Solenoid valve 10 , 11, 12, 64, 75, 78 Ice filling rate sensor 13, 77 Temperature sensor 15, 16 Connection portion 17, 80 Ice filling rate control device 21a, 31a, 41a Internal space 23, 33, 43 Supply ports 24, 34, 44a, 44b Discharge port 25, 35, 45 Ice slurry 26, 36, 46 Ice grain 27, 37, 47, 63 Atmospheric pressure release valve 54 Circulation pump 55 Circulation pipe 58 Three-way valve 59 Check valve 60 Cold storage vehicle 61 Cargo compartment 65 Underground pit 71 Ice slurry supply pipe 72 Brine recovery pipe 73 Coupler 74 Automatic open / close valve 76, 79 Flow meter 80 Ice filling rate control device 81 Ice filling rate sensor 82 Supply Unit 83, 84 Solenoid valve

Claims (7)

In the method of filling the ice slurry to the target ice filling rate in the cooling panel having the internal space filled with the ice slurry generated by making the latent heat storage brine into ice,
The internal space of the cooling panel is set in an open state by an open valve that communicates with the atmosphere, an ice slurry supply part is provided on one side of the cooling panel (including the central part), and the cooling panel is provided on the other side of the cooling panel. Each has a recovery unit for recovering the latent heat storage brine stored in the internal space,
After pre-cooling the internal space of the cooling panel using the ice slurry brine,
Transition to the ice filling rate gradual increase step of the ice slurry, the inflow flow rate of supplying the ice slurry from the supply unit to the cooling panel is larger than the outflow rate of discharging the brine from the recovery unit,
The ice slurry is supplied from the supply unit to the internal space of the cooling panel while discharging the brine from the recovery unit while filling the internal space of the cooling panel at an ice filling rate lower than a target ice filling rate. A method of filling an ice slurry into a cooling panel, wherein the ice filling rate of the ice slurry is gradually increased to obtain a target ice filling rate in the internal space of the cooling panel. The bottom wall of the cooling panel is formed to be inclined downward in one or both flow directions from the ice slurry supply part, and a recovery part is provided on the bottom wall on the downstream side in the inclined direction, and the cooling panel is provided. The gap height of the internal space of the supply section provided on the side is made higher than the gap height of the internal space of the recovery section provided on the other side of the cooling panel, so that the gap height changes along the slurry flow direction. The method of filling ice slurry into the cooling panel according to claim 1. The flow rate of the slurry flowing in the internal space is reduced by increasing the number of return portions provided on the other side of the cooling panel from the supply portion provided on one side (including the central portion) of the cooling panel. Item 2. A method for filling an ice slurry in a cooling panel according to Item 1. In the method of filling the ice slurry to the target ice filling rate in the cooling panel having the internal space filled with the ice slurry generated by making the latent heat storage brine ice,
An ice storage tank for storing ice slurry produced by an ice making machine, an ice slurry having a filling rate controlled by an ice filling rate control unit is taken out from the ice storage tank, and a flow of ice slurry in only one direction is allowed by a check valve. A one-way circulation loop system for returning the ice slurry to the ice storage tank; and the cooling panel connected to the one-way circulation loop system via a supply unit and a recovery unit branched from the one-way circulation loop system,
With the open valve that communicates the cooling panel with the atmosphere, the internal space of the cooling panel is open to the atmosphere,
After pre-cooling the internal space of the cooling panel using the ice slurry brine,
The inflow flow rate for supplying ice slurry from the supply pipe to the cooling panel is larger than the outflow flow rate for discharging the brine from the recovery unit,
The inside of the cooling panel is filled with the ice slurry from the supply pipe into the internal space of the cooling panel at an ice filling rate lower than the target ice filling rate, and the brine is discharged from the recovery unit. A method of filling an ice slurry into a cooling panel, wherein the ice filling rate of the ice slurry supplied to the space is gradually increased to obtain a target ice filling rate in the internal space of the cooling panel. A cooling panel having an internal space for filling ice slurry generated by making brine for latent heat storage is disposed in the cooling chamber, and the slurry filling device for the cooling panel fills the cooling panel with ice slurry to the target ice filling rate. In
The cooling panel is disposed on a ceiling portion of the cooling chamber, and an air release valve is provided on the ceiling wall side of the cooling panel to set an internal space of the cooling panel to an atmospheric pressure open state, and the cooling The bottom wall of the panel is formed so as to be inclined downward in one or both flow directions from the ice slurry supply part, and a recovery part is provided on the bottom wall on the downstream side in the inclined direction, and the cooling panel has an internal space. brine for latent heat storage are pooled and concentrated with incrementing ice slurry to be filled in the inner space while the recovery from the recovery unit from a low ice filling rate than the target ice filling rate of ice slurry to target the ice filling rate An ice slurry filling device for a cooling panel, comprising: an ice filling rate control device. 6. The ice filling rate control device according to claim 5 , further comprising detecting means for detecting the discharge of the brine from the discharging unit for discharging the brine and detecting that the target ice filling rate has been reached. Ice slurry filling device for cooling panel. An ice storage tank for storing ice slurry produced by an ice making machine, an ice slurry having a filling rate controlled by an ice filling rate control unit is taken out from the ice storage tank, and a flow of ice slurry in only one direction is allowed by a check valve. claim, characterized in that the ice slurry comprising the one-way circulation loop system back to the ice storage tank, comprising the cooling panel via the supply unit and the recovery unit is branched from the first direction circulation loop system connects 5 The ice slurry filling apparatus to the cooling panel as described.

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