JP4475584B2 - Thermal storage type cold storage vehicle or cold storage and thermal storage material supply system - Google Patents

Description

  The present invention provides a regenerative type cold storage vehicle equipped with a thin plate-like cooling panel having an internal space filled with a latent heat storage material made of ice slurry on the inner wall surface of the cargo compartment, and keeping the cargo compartment atmosphere by the cold heat of the latent heat storage material Alternatively, the present invention relates to a new structure of a cold storage, and a new supply system for supplying a latent heat storage material made of ice slurry to a cooling panel of the cold storage vehicle or the cold storage.

In recent years, the consumption structure of food has changed greatly. One is the price reduction of food by mass production and mass consumption, and the other is quality change such as high freshness and safety. Foods imported by low-temperature transportation are indispensable in order to supply low-priced foods that are free from seasonal fluctuations to meet the needs of convenience stores, supermarkets, and the restaurant industry.
On the other hand, an increase in imported foods, etc., leads to consumer anxiety when the producers are not known, and there is an increase in the number of foods that have been clarified as production areas, generally called direct births, and the form of distribution by low-temperature home delivery is rapidly progressing. The situation is also seen.

  Against this background, low-temperature transportation has become common for food logistics. Conventional low-temperature transport is carried out in refrigerated / refrigerated container vehicles. The in-vehicle refrigerator is operated directly connected to the engine and cooled in the warehouse, or the engine is powered and the in-vehicle electric refrigerator is operated. It was a cooling method. Although these distribution forms can manage the temperature inside the warehouse, the temperature rises when loading and unloading, and the temperature inside the warehouse is greatly changed, and it cannot be said that the efficiency of the in-vehicle refrigerator is good.

Conventional in-vehicle refrigerators are equipped with an evaporator (cooler) in the luggage compartment and an air-cooled condenser outside the compartment, driven by a belt from the engine, and driven by an electromagnetic clutch, or by a battery motor. .
Conventional in-vehicle refrigerators are operated so that the temperature in the cargo compartment is lower than a set value, and the in-vehicle refrigerator is also stopped when idling is stopped. If the door of the cargo compartment is opened, the air inside and outside of the room will be exchanged. When idling stops, the on-vehicle refrigerator will also stop, so the warm air that comes in after the cargo door is opened may be cooled. Since this is not possible, there is a problem that the temperature in the cargo compartment increases before the engine is operated. Moreover, since the forced convection is caused by the fan in the evaporator in the cargo compartment, there is a problem that the condensed water is scattered on the evaporator and the condensed water adheres to the loaded food. In addition, when a use temperature zone is low, there also exists a problem that raise | generates frost on the cooler surface of a cargo compartment, and refrigerator efficiency falls remarkably.

Refrigerated / refrigerated container vehicles that use dry ice as a cold insulation material without using a refrigerator are also in practical use, but there are problems such as reduced workability for loading dry ice, reduced load capacity, and difficult temperature control. is there.
Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-71248) discloses a low-temperature dynamic ice sales system based on a latent heat storage material, which includes a cold storage container base and a refrigerated container vehicle. The container base comprises a heat storage tank for storing low-temperature dynamic ice, a pump for transferring low-temperature dynamic ice, and a meter for weighing and selling, and the refrigerated container vehicle is a cold storage for storing low-temperature dynamic ice purchased by metering and transporting. The heat storage enclosure is stored and fixed in the container.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-125229) discloses a refrigerant replacement supply stand having a refrigerator that produces a low-temperature refrigerant and a server tank that stores the low-temperature refrigerant, There is disclosed a low-temperature food delivery system including a refrigerated container vehicle that receives a low-temperature refrigerant into an ice storage device in a vehicle via a hose. The cold storage tank of the ice heat storage device is provided with a heat transfer tube through which a cryogenic refrigerant passes and through which a low-temperature refrigerant passes. The low-temperature refrigerant is returned to the server tank via a hose after exchanging heat with the frozen liquid.

JP 2002-71248 A JP 2004-125229 A

However, the sales system of Patent Document 1 does not disclose a recovery method after use of low-temperature dynamic ice stored in a cold-reservoir thermal enclosure.
The low-temperature delivery system of Patent Document 2 freezes the frozen liquid in the cold storage tank in the ice storage device installed in the refrigerated container vehicle by the low-temperature refrigerant produced by the refrigerator, and the cold air cooled by the ice storage device is supplied to the fan. Therefore, forced convection is caused in the container, and there are many media that transmit energy, and there is a problem that the heat transfer efficiency is lowered accordingly.

The first object of the present invention, in view of the problems of the prior art, is capable of smoothly and efficiently performing the loading and recovery of the latent heat storage material made of ice slurry to a plurality of cold cars or cold storage, It is an object of the present invention to provide a heat storage material supply system to a cold storage vehicle or a cold storage room in which a medium for transmitting energy is reduced as much as possible to improve heat transfer efficiency.
In addition, the second object of the present invention is to maintain the cold insulation function even when the engine is stopped, to keep the cargo compartment cool without operating the in-vehicle refrigerator when the door is opened and closed, and to further condensate by forced convection by a fan in the cargo compartment. It is an object of the present invention to provide a cold car or a cold box that solves the problem that the condensed water is scattered and condensed water is attached to the loaded item.

The heat storage material supply system to the cold storage vehicle according to the present invention achieves such an object, and a cooling panel that cools the cargo room atmosphere by the cold heat of the latent heat storage material made of ice slurry, and the latent heat storage material on the cooling panel. A cold car or cold box provided with a supply section and a discharge section to supply;
A supply center that supplies the latent heat storage material to a cooling panel of the cold storage vehicle or the cold storage, and the supply center includes an ice storage tank that stores ice slurry produced by an ice making machine, and an ice filling rate from the ice storage tank. A one-way circulation loop system that takes out the ice slurry having a filling rate controlled by the control unit and returns the ice slurry to the ice storage tank while allowing a flow of the ice slurry in only one direction by a check valve , and the one-way circulation loop a branch loop consisting of the supply tube and the recovery tube branched from the system, the and the latent heat storage material and a plurality of supply units is provided for supplying the refrigerator truck to branch loop terminating,
The latent heat storage material is connected to the supply unit and the discharge unit through the supply unit and supplied to the cooling panel of a cold car or a cold storage , preferably the supply pipe side of the branch loop is 1 The unidirectional circulation loop system is connected to the upstream side of the ice slurry flow direction, and the recovery pipe side of the branch loop is connected to the downstream side of the unidirectional circulation loop system in the ice slurry flow direction .

In the supply system of the present invention, a metal cooling plate-like cooling panel having an internal space for filling the latent heat storage brine is provided in the cold storage car or the cold storage. The cooling panel is usually made of a metal with good thermal conductivity, such as aluminum or stainless steel, and it is made of a thin plate and box-shaped, or made of copper pipes, etc., and is made as thin as possible so as not to reduce the volume of the cargo compartment such as a cold storage. There must be. The cooling panel is filled with a latent heat storage material from the supply unit. Water or brine is used as a latent heat storage material after undergoing phase change (solidification). By changing the freezing temperature of the latent heat storage material by adjusting the brine concentration according to the operating temperature range (10 ° C or less for cold storage to about -30 ° C for freezing), one temperature storage type ice making device can be used. I can cover it.
By installing the supply system of the present invention in a distribution warehouse such as a supermarket, a convenience store, a family restaurant, etc., cooling the latent heat storage material and changing the phase, and filling it in a cold car or cold box, The food can be transported at low temperature without driving.

The first configuration of the cold storage vehicle or the cold storage of the present invention is such that a cooling panel that cools the cargo compartment atmosphere by the cold of the latent heat storage material made of ice slurry is disposed on the inner wall surface of the ceiling portion of the cargo compartment. A cold storage vehicle or cold storage used in the heat storage material supply system according to 1 or 2,
Said air release valve on the ceiling wall side of the cooling panel is provided, the inner space of the cooling panel and sets the atmospheric pressure open, formed inclined downward to the bottom wall of the cooling panel sided flow direction, the A discharge portion connected to the recovery pipe is provided on the bottom wall on the downstream side in the inclined direction inclined downward .

  Further, the second configuration of the cold car or the cold storage of the present invention is such that a cooling coil is inserted in a cooling panel, a refrigerator unit for producing a low-temperature refrigerant attached to the vehicle body is connected to the cooling coil, and the outer periphery of the cooling coil It is characterized in that the slurry-like latent heat storage material filled in the internal space of the cooling panel is frozen on the surface to keep the cargo compartment cold.

According to the heat storage material supply system of the present invention, the car mounting refrigerator is unnecessary, with refrigerated transport of food can be performed with less operation of the vehicle-mounted refrigerator, filling and latent heat storage medium for a plurality of refrigerator truck or refrigerator Collection becomes easy.

  In addition, by using the latent heat of the regenerator against the heat entering the cargo compartment of the cold car or the cool box, the weight of water or brine stored inside the regenerative cooling panel can be reduced compared to the sensible heat regenerator. Moreover, the temperature of the cooling panel maintains the freezing point while the latent heat of ice remains, so that the warm air coming from outside can be cooled after opening the door when idling is stopped. Moreover, since it is natural convection cooling of the latent heat storage material in the cooling panel and the cargo room atmosphere, the condensed water is not scattered.

Furthermore, by adjusting the brine concentration according to the operating temperature zone and changing the freezing temperature of the latent heat storage material, a plurality of temperature zones can be covered with a single heat storage type ice making device. This is expected to reduce carbon dioxide emissions due to engine exhaust and dry ice evaporation.
In addition, since there is always a low-temperature latent heat storage agent in the cargo compartment, it is possible to always cool the intrusion heat, and to reduce the temperature change in the warehouse accompanying idling stop and door opening / closing.

According to the refrigerator truck or refrigerator having a first configuration of the present invention, excessive pump pressure during the filling and recovery of the latent heat storage material to coercive cold vehicle is not applied, the smooth filling and recovery of the latent heat storage material Done.

The above configuration smell Te, along with the solar radiation to the luggage compartment can be effectively shielded, to facilitate the discharge of the brine only excluding ice in the discharge part, also be dropped condensation water attached to the cooling panel surface effectively it can.

Furthermore, according to the cooler or cooler having the second configuration of the present invention, the cooling coil is inserted into the cooling panel, and the refrigerator unit for producing the low-temperature refrigerant attached to the vehicle body is connected to the cooling coil. By cooling the slurry-like latent heat storage material filled in the internal space of the cooling panel on the outer peripheral surface of the cooling coil and keeping the cargo compartment cold, it is not necessary to obtain the latent heat storage material from a supply source outside the vehicle. In addition to being able to cover, it is natural convection cooling, so it does not scatter condensed water. In addition, the effect by using a latent heat storage agent is as above-mentioned.
Further, the latent heat storage material can be cooled using an in-vehicle refrigerator unit, for example, during idling before traveling or during traveling after delivery.

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.
FIG. 1 is a system diagram showing a first embodiment of the heat storage agent supply system of the present invention, and FIG. 2 is an overall perspective view showing a second embodiment of the heat storage agent supply system of the present invention.

  In FIG. 1 showing the first embodiment of the present invention, reference numeral 1 denotes a refrigeration unit installed on land that produces a sub-freezing refrigerant, which is sent to the ice making machine 2, and the ice making machine 2 uses the cold heat of the refrigerant to cause latent heat. An ice slurry is produced by making brine for heat storage. 3 is an ice storage tank for storing ice slurry produced by the ice making machine 2, and 4 is a circulation pump for circulating the latent heat storage brine stored in the ice storage tank 3 to the ice making machine 2 in order to make ice. Reference numeral 5 denotes a circulation pipe for constantly circulating the ice slurry in the ice storage tank 3 by the supply pump 6 and the recovery pump 7. No. 8 uses the fact that the ice content is different depending on the connection part of the ice intakes 5a and 5b connected to the ice storage tank 3, and the circulation pipe 5 changes the inflow amount of the ice intakes 5a and 5b. A three-way valve 9 for controlling the ice filling rate of the ice slurry circulating in 5 is a check valve that allows the flow only in the direction of the arrow.

Reference numeral 10 denotes a cold car, and a cooling panel 12 is disposed on the ceiling portion of the inner wall surface of the luggage compartment 11. The cooling panel 12 has an internal space filled with ice slurry, and the object to be cooled loaded in the luggage compartment 11 is kept cold by the cold heat of the ice slurry filled in the internal space. Reference numeral 13 denotes an atmosphere release valve for communicating the internal space of the cooling panel 12 with the atmosphere.
21 is a pipe for supplying ice slurry from the circulation pipe 5 to the internal space of the cooling panel 12, and 22 is a collection pipe for collecting the brine after melting of the ice inside the cooling panel from the cooling panel 12 to the circulation pipe 5. . The connection portion of the recovery pipe 22 is provided on the inclined bottom wall side of the cooling panel 12 that is convenient for taking out only the brine.

  Reference numeral 23 denotes a supply unit provided at a branch end of the supply pipe 21 and the recovery pipe 22 branched from the circulation pipe 5. The supply pipe 21 or the recovery pipe 22 is connected to the supply unit 23 by a coupler 24 provided in the supply unit 23. It can be separated into the cold storage vehicle 10 side. An automatic open / close valve 25 has a structure in which the internal valve opens when the coupler 24 is connected and the internal valve closes when the coupler 24 is disconnected. Reference numeral 14 denotes an underground pit for temporarily storing the brine recovered by the recovery pipe 22.

In the ice slurry supply system of this embodiment, first, the ice slurry stored in the ice storage tank 3 is circulated in the circulation pipe 5. At that time, the ice filling rate of the ice slurry supplied to the cold car 10 is lower than the target ice filling rate of 40% to 50%, so that the ice filling rate flowing through the circulation pipe 5 is lower and 15% to 20%. Based on the detected value of the ice filling rate sensor 26, the inflow amounts of the ice inlets 5a and 5b of the three-way valve 8 are controlled.
By setting the flow velocity in the circulation pipe 5 to 1 m / s or more, ice slurry can be supplied from each branch pipe 36 to each supply pipe 21 with an ice filling rate equal to that of the circulation pipe 5.
Next, the internal space of the cooling panel 12 of the cold storage vehicle 10 that supplies ice slurry and the circulation pipe 5 are connected by a supply pipe 21 and a coupler 24 of a recovery pipe 22 provided in the supply unit 23. After that, the brine stored in the internal space is filled to the other side of the cooling panel while filling the internal space of the cooling panel 12 from the supply pipe 21 connected to the panel 12 side with an ice filling rate lower than the target ice filling rate. It collects in the collection tube 22 connected to.

Then, by supplying the ice slurry to the cooling panel 12 and removing the brine, the ice filling rate stored in the internal space of the cooling panel 12 is gradually increased, and the ice filling rate in the internal space of the cooling panel is targeted. Fill rate.
The brine recovered from the recovery pipe 22 is once discharged into the underground pit 14 or simultaneously with the supply of ice slurry, the brine is sucked by the recovery pump 7 and recovered in the ice storage tank 3.

According to the present embodiment, the ice slurry can be efficiently and simultaneously filled into the cooling panels 12 installed in the plurality of cold cars 10. In addition, by controlling the three-way valve 8 as described above, the ice filling rate of the ice slurry to be filled in the cooling panel can be changed, thereby performing an initial cooling step of filling only the brine excluding ice into the cooling panel. be able to.
Moreover, since the connection part of the collection | recovery pipe | tube 22 is provided in the downward bottom wall side which inclined the cooling panel 12 convenient for taking out only a brine, only a brine can be taken out easily. Moreover, since the lower bottom wall side of the cooling panel 12 is inclined, the condensed water adhering to the cooling panel can be dropped along the inclined surface.
Since the internal space of the cooling panel 2 of the cold car 10 is communicated with the atmosphere by the atmosphere release valve 13, excessive pump pressure is not applied when supplying the ice slurry and discharging the brine, so the strength of the cooling panel is reduced. It is not necessary to make it excessive, and pump power can be reduced.

  Next, a second embodiment of the heat storage material supply system of the present invention will be described with reference to FIG. In FIG. 2, reference numeral 31 denotes an ice making unit that manufactures a latent heat storage material made of ice slurry. The ice slurry manufactured here is stored in an ice storage tank 32. The ice slurry constantly circulates in the circulation pipe 34, and the ice filling rate of the ice slurry is adjusted based on the detection value of the ice filling rate sensor 45 and the intake water flow rate from the water intake ports 35 a and 35 b of the three-way valve 35. Can be controlled. A supply unit 37 is connected to the terminal side of the branch pipe 36 branched from the circulation pipe 34, and in the supply unit 37, a cooling panel 39 disposed in the cargo compartment 38 a of the cold-reserving track 38 is filled with ice slurry.

In this case, a hose 40 filled with ice slurry from the supply unit 37 is connected to the cooling panel 39, and a connecting portion 41 comprising a coupler 41a and automatic opening / closing valves 41b provided on both sides of the hose 40 is configured. The automatic open / close valve 41b is automatically closed simultaneously with the disconnection to prevent the ice slurry from leaking.
Reference numeral 42 denotes a brine recovery pipe for recovering the brine in the cooling panel 39 to the underground pit 33. The hose 40 has a structure in which the ice slurry supply pipe and the brine recovery pipe are combined into one.

At the start of ice slurry filling, by pressing a start button (not shown) in the supply unit 37, initial cooling in the cargo chamber 38a, filling of ice slurry and recovery of brine are started. After the cooling is completed, the connecting portion 41 is removed, and the cold truck 38 is moved to the distribution center to load the luggage.
In this embodiment, the brine recovery pipe 42 has an underground burial or flooring structure. A pump 43 returns the brine collected in the underground pit 33 to the ice storage tank 32, and a pump 44 circulates the brine between the ice making unit 31 and the ice storage tank 32.
In this embodiment, ice slurry may be filled in a cooling panel disposed in the cold storage instead of the cold storage truck 38, and the same procedure is performed in that case.

  Next, a third embodiment according to the cold car of the present invention will be described with reference to FIG. In FIG. 3, reference numeral 51 denotes a cold car equipped with a heat storage type cooling panel 53 disposed horizontally on the ceiling of the cargo compartment 52. The regenerative cooling panel 53 is made of a metal such as aluminum or stainless steel, has a thin plate shape, and is filled with water or brine W. The cooler wheel 51 is provided with an engine belt-driven or battery motor-driven refrigerator 54 in the vicinity of the cab, and the refrigerant circulates in a circulation system in which a compressor 55, a condenser 56, and an orifice or an expansion valve 57 are interposed. ing. A part of the circulation system is a cooling coil 58 inserted inside the cooling panel 53, where the refrigerant evaporates and takes away latent heat of evaporation from the surroundings, thereby generating ice on the surface of the cooling coil 58. Then, the atmosphere in the cargo compartment 52 is kept cold using the latent heat of the ice.

In the present embodiment, the freezing point of ice can be adjusted to 0 ° C. or lower by changing the concentration of brine W. Moreover, the weight of the water or brine W stored in the cooling panel 53 can be reduced with respect to the sensible heat storage agent by using the latent heat of the cold storage agent against the intrusion heat.
In addition, while the latent heat of ice remains, the temperature of the cooling panel 53 maintains the freezing point, so that it is possible to cool the warm air coming from outside after opening the door when idling is stopped. Further, as shown in the figure, the bottom surface of the cooling panel 53 is inclined to one side, so that the dew condensation water attached to the surface can be easily dropped. Further, since natural convection cooling is performed in the cargo room 52, the condensed water is not scattered.
Moreover, since the vehicle-mounted refrigerator is mounted, it is not necessary to fill the latent heat storage material from the outside, and the cold insulation function can be maintained even when idling is stopped.

  Next, a fourth embodiment according to the cold car of the present invention will be described with reference to FIG. In FIG. 4, an engine belt-driven or battery motor-driven refrigerator 64 is installed in the vicinity of the cab of the cold car 61, and the refrigerant is a compressor 65, a condenser 66, and an orifice or an expansion valve 67. The circulation system is formed as in the third embodiment. In this embodiment, an ice making machine 68 and a water pump 69 are provided in the refrigerant circulation system instead of the cooling coil, and the ice slurry (dynamic ice) produced by the ice making machine 68 is stored in the heat storage type cooling panel 63 by the water pump 69. It is set as the structure filled with. Reference numeral 70 denotes a valve that opens the internal space of the cooling panel 63 to the atmosphere.

According to the present embodiment, since the latent heat storage material is ice slurry (dynamic ice), there is an advantage that the shape of the cooling panel 63 is free. Further, the brine W is sent to the ice making machine 68 by the water pump 69 and is made into a fine ice slurry having a diameter of about 0.1 mm and stored in the cooling panel 63, whereby the static generated on the surface of the cooling coil 58 in the third embodiment. There is an advantage that the cooling efficiency is further improved because the melting property is better than that of fresh ice and the ice slurry and brine are agitated as the cold car is started and stopped. Furthermore, it is known that the coefficient of performance COP of the refrigerator is better than that of generating static ice on the cooling coil surface.
Further, since the inside of the cooling panel 63 is opened to the atmosphere by the atmosphere release valve 70, there is an advantage that the pump power when the brine W is sent back to the ice making machine 68 is not excessive.

  Next, a fifth embodiment of the cold car according to the present invention will be described with reference to FIG. In FIG. 5, in this embodiment, the on-board refrigerator is removed from the cold storage vehicle 71, and ice slurry (dynamic ice) is stored in the heat storage type from the on-land refrigerator unit 74 and the ice maker 75 through the connection 76 by the water pump 77. In this method, the cooling panel 73 is filled. The connecting portion 76 can be disconnected by the coupler 76a, and the automatic on-off valve 76b prevents the ice slurry from leaking when disconnected. Reference numeral 72 denotes a luggage compartment, and 78 denotes an air release valve.

  According to the present embodiment, the efficiency of the refrigerator unit, which is reduced by using brine or water as the latent heat storage material, is a land-based refrigerator unit, so that a water-cooled condenser, an evaporative condenser, etc. can be used. Since the efficiency of on-shore refrigerators is better than that of refrigerators, there is an advantage that energy efficiency can be improved. Further, by consolidating a plurality of in-vehicle refrigerator units into one on-land refrigerator unit, it is possible to prevent leakage of chlorofluorocarbon refrigerant from each in-vehicle refrigerator, and there is an advantage that maintenance of devices can be performed collectively.

The comparison results of the conventional on-board refrigerator and the performance of this system using a 2-ton standard truck are shown.
FIG. 6 shows a comparison of fuel consumption with elapsed time during delivery operation in a test simulating delivery at a convenience store. It travels 8 stores at 20-30 km / h with a driving interval of about 20 minutes and stops at each store.
Although this system increases the weight of the vehicle by about 150 kg due to the ice slurry filling, it does not consume more fuel than when cooling with a conventional in-vehicle refrigerator. During cooling by a conventional in-vehicle refrigerator, fuel is further consumed when the cargo compartment is cooled by initial idling cooling.

FIG. 7 shows a comparison of the average air temperature inside the cabinet when the rear door is opened and closed.
In a test simulating the delivery of a convenience store, when cooling with a conventional in-vehicle refrigerator, the refrigerator stops when idling stops, and when the rear door is opened, it is replaced with outside air, as shown in the figure The air temperature in the cargo compartment rises.
When cooling with the ice slurry-filled cooling panel of this system, there is always a heat storage material with a cold amount even when idling is stopped, so there is little temperature rise associated with opening and closing the rear door, and cooling can be performed even when idling is stopped.

In addition, the conventional cold roll box (mobile refrigerator) requires a cold storage operation time of 5 to 10 hours with a small refrigerator mounted on itself to keep the latent heat agent enclosed in itself cold. In the number of deliveries of 3 times / day, the number of possessed units is required to be at least 2 to 3 times the required number of deliveries.
In the heat storage type cool box in this embodiment, the cooling agent can be filled and cooled in a few minutes to 10 minutes, and the same number as the required number of delivery is sufficient.

  FIG. 8 is a cross-sectional view showing an installation example of a heat storage type cooling panel in a cold car or a cold box. In FIG. 8, (a) and (b) show the example of installation in the cold storage vehicle 81 having the tire 85 (viewed from the rear), and (c) shows the installation example in the heat storage type cold storage having the casters 84. is there. (A) is the example which installed the thermal storage type cooling panel 83 in the ceiling part of the cargo compartment 82, (b) is the example installed in the side wall surface part of the cargo compartment 82. Moreover, (c) is an example which installed the thermal storage type cooling panel 93 in both the ceiling part and side wall part of the luggage compartment 92 of the cool box 91. FIG.

In (a) and (b), in order to increase the heat transfer area, it is preferable to provide a cooling plate 84 that also serves as a beam. The cooling panel 83 and the cooling plate 84 must be made as thin as possible so that the cargo compartment is not narrowed. When filling with ice slurry, the dimension in the cooling panel 83 can be narrowed to about 5 mm. The water or brine to be filled in the cooling panel is provided with an expansion layer in the upper part of the cooling panel in consideration of the expansion when the phase changes to ice, so that no pressure is applied beyond the head pressure of the brine itself. It is necessary to communicate with the outside air.
By not using the cooling panel as a pressure vessel, the thickness of the plate material can be reduced, and by reducing the reinforcement, the cooling panel itself can be made thinner and the weight can be reduced. In addition, since the cooling panel is made thin, a large contact area between the internal ice and the panel plate material can be obtained and heat transfer is improved, so that it is not necessary to promote mixing of ice in the cooling panel and convection of brine.

  According to the present invention, when food or the like that needs to be kept cold is transported by a cold car, a heat storage type cooling panel that fills the internal space with a latent heat storage material made of ice slurry is disposed in the cold storage room or the cargo room of the cold car. Realizes a cold storage vehicle that can improve the cold storage capacity and maintain the cold storage function even when the engine is stopped, and can cool the cargo compartment without opening the in-vehicle refrigerator when the door is opened and closed. Thus, it is possible to realize a heat storage agent supply system capable of smoothly and efficiently loading and recovering a latent heat storage material made of ice slurry.

It is a distribution diagram showing the 1st example of the thermal storage agent supply system of the present invention. It is a whole perspective view which shows 2nd Example of the thermal storage agent supply system of this invention. It is an elevation sectional view showing the 3rd example concerning the cold-reserving vehicle of the present invention. It is an elevation sectional view showing the 4th example concerning the cold-reserving vehicle of the present invention. FIG. 10 is an elevational cross-sectional view showing a fifth embodiment according to the cold insulated vehicle of the present invention. It is a diagram which shows the comparative measurement result of the consumption fuel with the elapsed time at the time of delivery operation. It is a diagram which shows the comparative measurement result of the air temperature inside a store | warehouse | chamber at the time of rear door opening and closing. (A) And (b) is sectional drawing which shows the example of installation to the cold storage vehicle of a thermal storage type cooling panel, respectively, (c) is sectional drawing which shows the example of installation to the cold storage box of a thermal storage type cooling panel.

Explanation of symbols

1, 74 Land refrigeration unit 2, 75 Ice maker 3, 32 Ice storage tank 4 Circulation pump 5, 34 Circulation pipe 5a, 5b Water intake 6 Supply pump 7 Recovery pump 8, 35 Three-way valve 9 Check valves 10, 51, 61 , 71, 81 Cold storage vehicle 11, 52, 62, 72, 82, 92 Cargo compartment 12, 39, 53, 63, 73, 83, 93 Thermal storage cooling panel 13, 70, 78 Air release valve 14, 33 Underground pit 21 Ice slurry supply pipes 22, 42 Brine recovery pipes 23, 37 Supply units 24, 41a, 76a Couplers 25, 41b, 76b Automatic open / close valves 26, 45 Ice filling sensor 31 Ice making unit 36 Branch pipe 38 Cold storage truck 40 Hose 41, 76 Connection Units 54, 64 On-vehicle refrigerator 55, 65 Compressor 56, 66 Condenser 57, 67 Orifice or expansion valve 58 Cooling coil 68 On-vehicle ice maker 6 , 77 water pump 84 cooling plate 85 tire 91 refrigerator 94 caster

Claims (4)

A cooling panel that cools the cargo room atmosphere by the cold of the latent heat storage material made of ice slurry, a cold storage vehicle or a cold storage room that includes a supply unit and a discharge unit that supply the latent heat storage material to the cooling panel;
A supply center that supplies the latent heat storage material to a cooling panel of the cold storage vehicle or the cold storage, and the supply center includes an ice storage tank that stores ice slurry produced by an ice making machine, and an ice filling rate from the ice storage tank. A one-way circulation loop system that takes out the ice slurry having a filling rate controlled by the control unit and returns the ice slurry to the ice storage tank while allowing a flow of the ice slurry in only one direction by a check valve , and the one-way circulation loop a branch loop consisting of the supply tube and the recovery tube branched from the system, the and the latent heat storage material and a plurality of supply units is provided for supplying the refrigerator truck to branch loop terminating,
A system for supplying a heat storage material to a cold car or a cold box, wherein the latent heat storage material is connected to the supply unit and the discharge unit via the supply unit and is supplied to the cooling panel of the cold car or the cold box. The supply pipe side of the branch loop is connected to the upstream side in the ice slurry flow direction of the one-way circulation loop system, and the recovery pipe side of the branch loop is connected to the downstream side in the ice slurry flow direction of the one-way circulation loop system. The heat storage material supply system to the cold storage vehicle or the cold storage according to claim 1. The cold storage vehicle used for the heat storage material supply system according to claim 1 or 2, wherein a cooling panel that cools the atmosphere in the cargo compartment by the cold of the latent heat storage material made of ice slurry is disposed on the inner wall surface of the ceiling portion of the cargo compartment. Or a cold storage,
Said air release valve on the ceiling wall side of the cooling panel is provided, the inner space of the cooling panel and sets the atmospheric pressure open, formed inclined downward to the bottom wall of the cooling panel sided flow direction, the A regenerative cold storage vehicle or a cold storage , wherein a discharge portion connected to the recovery pipe is provided on the bottom wall on the downstream side in the inclined direction inclined downward . A cooling coil is inserted into the cooling panel, and the cooling coil is connected to a refrigerator unit for producing a low-temperature refrigerant attached to the vehicle body, and the slurry-like shape filled in the internal space of the cooling panel on the outer surface of the cooling coil. The regenerative type cold storage vehicle or cold storage room according to claim 3, wherein the latent heat storage material is frozen to cool the cargo compartment.

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