JP5518781B2 - Liquid cold storage tank truck - Google Patents

Description

The present invention relates to a liquid cooled tank lorry used for transporting a liquid while maintaining a low temperature, for example, when transporting milk.

  A cold transport vehicle for transporting liquid is known as a vehicle that transports liquid while maintaining a low temperature. This cold storage vehicle holds the space 3 outside the liquid storage container 1 and is surrounded by a box 4, and the box 4 is partitioned vertically by a partition plate 7 so that the outer peripheral surface of the container faces the lower ventilation path 10. In addition, the refrigerator 11 is installed at the inlet of the upper ventilation path 10, and the cold air outlet 9 is provided at the front of the lower ventilation path 10. It is comprised so that it may distribute | circulate to the cold wind outlet 9 through (patent document 1).

  Patent Document 2 includes a duct 12 that is disposed on an outer wall surface of a tank 2 that stores liquid and serves as an air circulation path, and a cooler 3 that blows and distributes cooled air. A tank lorry configured to cool the liquid stored in the tank 2 by circulating air cooled by the cooler 3 is disclosed (Patent Document 2).

Registration No. 2515346 Utility Model Gazette JP 2007-106450 A

In the cold transport vehicle for transporting liquid described in Patent Document 1 described above, the container 1 mounted on the vehicle is surrounded by the box 4. However, since the outer dimensions of the box 4 are regulated by laws and regulations related to the vehicle, the container 1 is stored. There is a problem that the size of the container to be used is restricted, and thus the amount of liquid transport is restricted, and the vehicle weight is increased. In addition, since the airtight box 4 is configured so that the inspection work or the like of the container 1 can be performed, there are problems that the manufacturing cost is high and the workability of the inspection work is inferior.

  In the tank truck of Patent Document 2, the forward passage 12a and the return passage 12b are both communicated with the space 3a in the cooler 3 in which the cooler 9 and the blower 10 are disposed. There is a problem that the wind pressure also acts on the return passage 12b side to suppress the flow of return air flowing into the cooler 3 and impairs the fluidity of the cooling air in the duct 12.

The present invention has been made in view of the above-described problems of the prior art, and since the refrigerant circulates evenly and smoothly in the plurality of refrigerant circulation pipes, the cold-retaining liquid can be efficiently cooled, It is an object of the present invention to provide a liquid cooled tank lorry that can reduce the weight of the vehicle and maintain equipment by removing the refrigerant circulation device from the vehicle as necessary, and can reduce transportation costs.

According to a first aspect of the present invention configured to solve the above-described problem, a plurality of refrigerant circulation pipes are provided in contact with the outer surface of a tank body that stores a cold-retaining liquid, and the refrigerant circulation is provided. It consists of a structure that covers the entire outer surface of the tank body with a heat insulating material, including pipes, a liquid storage tank that is mounted on a self-propelled or towed vehicle, and a refrigerant that is mounted on the vehicle and circulates through each refrigerant circulation pipe A refrigerant circulation device to be supplied, wherein the plurality of refrigerant circulation pipes are arranged along an axis on the outer surface of the upper half of the tank body, and the refrigerant circulation device is connected to the return side of each refrigerant circulation pipe. A refrigerant flow box in which the end of the connecting pipe is disposed on the lower side, a cooler for cooling the refrigerant in the refrigerant flow box and the return refrigerant discharged from the end, and an upper side in the refrigerant flow box. Each of the refrigerant circulation pipes A refrigerant induction box base end of the connection pipe is connected Ri, it is positioned between the refrigerant induction box and the cooler, and a fan for feeding the refrigerant toward the refrigerant induction box inlet.

Then, the refrigerant in the refrigerant flow box is forcibly fed by the blower so that the refrigerant induction box has a positive pressure and the refrigerant flow box has a negative pressure. The refrigerant in the refrigerant circulation pipe may be circulated in a state where a pressure difference is formed between the start end side of the pipe and the end side of the return side connecting pipe.

In addition, the blower is disposed substantially in front of the refrigerant outlet of the cooler so as to face the refrigerant guide box, and the end of the return side connecting pipe is spaced apart on both the left and right sides of the cooler. It is good to set it as the structure arrange | positioned at the lower part in a fluid box.

Further, the refrigerant circulation device may be detachably mounted on the vehicle by being connected to and separated from the refrigerant circulation pipes.

The casing of the refrigerant induction box may be provided with an upward concave curved surface that induces the refrigerant.

Since the present invention is configured as described above, the following effects can be obtained.
(1) According to the present invention, the feed refrigerant cooled by the cooler is forcibly sent to the refrigerant circulation pipe side through the refrigerant induction box by the blower, so that the refrigerant is substantially evenly distributed to the plurality of refrigerant circulation pipes. Since the refrigerant can be efficiently sent and circulated, the liquid storage tank can be reliably cooled to a desired temperature state.
(2) In the airtight refrigerant flow box, the refrigerant is forcibly sent by a blower to the refrigerant induction box, so that the pressure inside the refrigerant induction box is higher than that of the atmosphere. Due to the negative pressure, a pressure difference is generated between the inlet of the refrigerant circulation pipe having the refrigerant induction box as a base and the outlet of the refrigerant circulation pipe having the refrigerant flow box as a terminal, and the refrigerant in the refrigerant circulation pipe is smoothly and Since it can be circulated and flowed efficiently, high cooling efficiency can be obtained.
(3) The blower is arranged facing the front of the substantially central portion of the refrigerant outlet of the cooler, and the end of the return side connecting pipe is arranged near the left and right side plates as seen from the cooler side in the refrigerant flow box and at the bottom. Therefore, the efficiency of using the cold energy of the refrigerant is good, and the burden on the cooler is small.
(4) By disposing the plurality of refrigerant circulation pipes on the outer surface of the upper half of the tank main body, it is possible to keep cold while effectively suppressing the influence of the outside air temperature due to solar heat or the like with a small number of pipes.
(5) Since the refrigerant circulation device is configured to be detachably mounted on the vehicle and can be removed from the vehicle according to the winter or local circumstances, the vehicle can be reduced in weight and equipment can be maintained. In addition, fuel costs can be saved.
(6) Since the casing of the refrigerant induction box is provided with the upward concave curved surface, the refrigerant sent horizontally by the blower can be efficiently fed into the upper feed connecting pipe.

It is a whole block diagram of a liquid cold storage type tank truck. It is explanatory drawing which shows the structure of a refrigerant circulation apparatus. It is sectional drawing perpendicular | vertical to the axial center of a liquid storage tank. It is a front principal part perspective view of a liquid cold storage type tank truck. It is explanatory drawing which shows the connection relation of a refrigerant | coolant fluid box and a refrigerant | coolant circulation pipe. It is explanatory drawing of a refrigerant circulation apparatus. It is an explanatory view of the relationship between the refrigerant induction box and the blower. It is a flow explanatory view of a refrigerant by a refrigerant fluid box and a cooler.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a semi-trailer connection vehicle. The semi-trailer connection vehicle 1 includes a towing vehicle 1A having an engine, a steering mechanism, and a cab, and a trailer 1B towed by the towing vehicle 1A. Reference numeral 2 denotes a liquid storage tank mounted on the trailer 1B. Reference numeral 3 denotes a stainless steel tank main body constituting the liquid storage tank 2, and the tank main body 3 includes a circular plate 3A, end plates 3B and 3B closing both axial ends of the circular plate 3A, and a circular plate. It is comprised from the covered inlets 3C and 3C provided in the upper part of 3A.

  2 and 3, reference numerals 4, 4,... Indicate a plurality of refrigerant circulation pipes disposed on the semicircular outer surface of the substantially upper half of the circular plate 3A. Each refrigerant circulation pipe 4 is formed of a stainless steel square tube, and a feed pipe portion 4A extending from the front side to the rear side along the axis of the tank body 3 and a return pipe extending in parallel with the feed pipe portion 4A. It consists of a part 4B and a folded pipe part 4C that connects the rear end of the feed pipe part 4A and the return pipe part 4B. Each feed tube portion 4A, return tube portion 4B, and folded tube portion 4C are fixed to each other by spot welding at an appropriate interval while being in surface contact with the cylindrical plate 3A. The strength against is increased.

  The outer surface of the tank body 3 including the plurality of refrigerant circulation pipes 4, 4,... Is entirely covered with a heat insulating material 5 (see FIG. 3). The heat insulating material 5 is made of, for example, a material having excellent heat insulating properties such as urethane foam. Further, the outer surface of the heat insulating material 5 is covered with a metal outer shell 6 so as to be protected from external force.

2, 5, and 6, reference numeral 7 denotes a feed-side connecting pipe composed of a flexible pipe detachably connected to the tip of the feed pipe section 4 </ b> A of each refrigerant circulation pipe 4 via a joint pipe 8, and 9 denotes a return pipe section. 4B shows a return side connecting pipe made of a flexible pipe detachably connected to the end of 4B via a joint pipe 8, and the feed side connecting pipe 7 and the return side connecting pipe 9 are covered with a heat insulating material.

FIG. 5 shows the external appearance of the refrigerant circulation device 11, and FIG. 6 shows its internal configuration. The refrigerant circulation device 11 is a device that circulates and supplies a refrigerant, for example, cold air, to each refrigerant circulation pipe 4 and includes a refrigerant flow box 12, a refrigerant induction box 13, a cooler 15, and a blower 16 , which will be described later. Hereinafter, cooling air will be described as an example of the refrigerant.

The refrigerant flow box 12 that constitutes the refrigerant circulation device 11 and is detachably mounted on the trailer 1B includes a horizontally long bottom plate 12A, a front plate 12B and a rear plate 12C that stand from the outer edge of the bottom plate 12A, and left and right side plates 12D and 12D. In addition, the heat insulating structure is formed in an airtight box shape from the top plate 12E, and a heat insulating material is sandwiched between the aluminum interior and exterior. And the refrigerant | coolant suction inlet 12F is formed in the lower side position of the front side board 12B, and the refrigerant | coolant blowing outlet 12G is formed in the horizontal slit shape in the upper side position. In addition, the refrigerant | coolant fluid box 12 is provided with the door 12H for entrance / exit for maintaining an internal apparatus in either of the right-and-left side plate 12D.

Reference numeral 13 denotes a refrigerant guide box provided on the upper side of the rear plate 12C so as to face the refrigerant outlet 12G of the refrigerant flow box 12. The refrigerant guide box 13 includes a horizontally long casing 13A having a front opening as an inlet, and a refrigerant guide plate 13B having an upward concave curved surface provided in the casing 13A. Are provided with refrigerant introduction pipes 14, 14,... That are detachably connected via six feed-side connection pipes 7 and joint pipes 8. As shown in FIG. 7, the refrigerant guide box 13 having such a configuration efficiently guides the refrigerant that is forcibly sent in a horizontal direction from a blower 16 described later toward the respective refrigerant introduction pipes 14.

Reference numeral 15 denotes a cooler that projects forward from the front upper portion of the front plate 12B of the refrigerant flow box 12. The cooler 15 includes a casing 15A having an air intake port and a known cooling unit 15B stored in the casing 15A. The cooler 15 cools the refrigerant by sucking the return refrigerant from the refrigerant suction port 12F of the refrigerant flow box 12. The refrigerant is blown out from the refrigerant outlet 12G toward the refrigerant flow box 12.

Further, 16 is a blower that faces the refrigerant guide box 13 and is provided in the refrigerant flow box 12 at a position substantially in front of the refrigerant blowout port 12G. The refrigerant that is cooled and blown out by the cooler 15 is urged and blown toward the inlet of the refrigerant guide box 13. In this embodiment, one blower 16 is used, but a plurality of blowers 16 may be used to enhance the refrigerant blowing function.

Reference numerals 17, 17,... Denote refrigerant discharge pipes that are detachably connected to the return side connection pipes 9 via the joint pipes 8. Each of the refrigerant discharge pipes 17 is separated from both the left and right sides of the cooler 15, and three refrigerant discharge pipes 17 are arranged on the left and right along the side plate 12 </ b> D of the refrigerant flow box 12, with the upper end 17 </ b> A protruding from the top plate 12 </ b> E. The lower end side 17B is positioned below the refrigerant suction port 12F.

Further, 18 shown in FIG. 4 is a cover detachably provided above the refrigerant flow box 12, and the cover 18 is composed of a front plate 18A having an upwardly inclined surface, side plates 18B and 18B, and a top plate 18C. By covering the feed-side connecting pipe 7 and the return-side connecting pipe 9, it has a function of protecting against wind pressure, rainwater, solar heat, ultraviolet rays, etc. and reducing air resistance during travel.

The liquid cooled tank lorry according to the present embodiment has the above-described configuration. Next, the operation thereof will be described. When transporting a refrigerated liquid such as milk, the refrigerated liquid is stored in the liquid storage tank 2 and the cooler 15 is operated to cool the refrigerant in the refrigerant fluidized box 12. The cooled refrigerant is forcibly blown into the refrigerant guide box 13 by the blower 16 and is guided and sent to the refrigerant introduction pipe 14 by the refrigerant guide plate 13B, whereby the feed side connecting pipe 7 and the feed pipe portion of the refrigerant circulation pipe 4 are sent. It flows to 4A and the tank main body 3 is cooled. Then, the refrigerant flows through the return pipe portion 4B through the folded pipe portion 4C, and is discharged from the refrigerant discharge pipe 17 to the refrigerant flow box 12, whereby the refrigerant is circulated.

  Here, the flow of the refrigerant in the refrigerant flow box 12 will be described with reference to FIG. The return refrigerant recirculated from the refrigerant discharge pipe 17 into the refrigerant flow box 12 is sucked and cooled by the cooler 15 from the lower refrigerant suction port 12F, and then substantially returned to the refrigerant flow box 12 from the upper refrigerant outlet 12G. It is blown out horizontally. A part of the blown out refrigerant is forcibly blown into the refrigerant guide box 13 by the blower 16 and flows into the refrigerant introduction pipe 14. On the other hand, the other refrigerant flows in the refrigerant flow box 12 from the rear side wall 12C along the bottom plate 12A, and the return refrigerant discharged from the refrigerant discharge pipe 17 is mixed with this and sucked into the cooler 15 from the refrigerant suction port 12F. Then, the refrigerant circulates by being cooled and discharged from the refrigerant outlet 12G.

And the refrigerant | coolant discharge pipe | tube 17 arrange | positioned along the right-and-left side plates 12D and 12D vicinity in the refrigerant | coolant fluidized box 12 so that the return refrigerant | coolant which the temperature rose may not be directly sucked into the air blower 16 and sent to the refrigerant induction box 13 The refrigerant flowing box 12 is discharged from the lower end side 17B on the lower side so that the refrigerant is reliably sucked into the cooler 15 from the refrigerant suction port 12F, and the refrigerant sent to the refrigerant guide box 13 is on the cooler 15 side. The refrigerant is a low-temperature refrigerant with little mixing of the return refrigerant at the center. Further, by disposing the blower 16 so as to face the refrigerant outlet 12G, a substantially central circulation flow in the refrigerant flow box 12 is preferentially blown into the refrigerant guide box 13, so that the refrigerant can be sent out efficiently.

The refrigerant flows in the refrigerant flow box 12 as described above, but is cooled every time it passes through the cooler 15 and is cooled to a target temperature. Control of the refrigerant temperature by the cooler 15 is performed by controlling the air volume of the cooler 15, but since it is not possible to control the refrigerant to be rapidly cooled, it is necessary to temporarily store the refrigerant at a constant temperature. The cooler 15 plays this role.

  Moreover, in the airtight refrigerant flow box 12, the refrigerant is forcibly sent to the refrigerant induction box 13 by the blower 16, so that the refrigerant induction box 13 has a positive pressure higher than that of the atmosphere and supplied the refrigerant. The refrigerant flow box 12 has a negative pressure. As a result, the inlet side of the refrigerant introduction pipe 14 inserted in the refrigerant induction box 13 and connected to the refrigerant circulation pipe 4, the lower end side 17 </ b> B of the refrigerant discharge pipe 17 inserted in the refrigerant flow box 12, and the refrigerant flow box 12 A pressure difference is generated between the left and right sides at the lower side, and the refrigerant in the refrigerant circulation pipe 4 can circulate smoothly and efficiently by this differential pressure.

  The refrigerant flow box 12 constituting the refrigerant circulation device 11 is detachably mounted on the trailer 1B, and the feed side connecting pipe 7 is connected to the feed pipe portion 4A and the refrigerant introduction pipe 14 of the refrigerant circulation pipe 4 and the joint pipes 8 and 8. The return side connecting pipe 9 is detachably connected by the return pipe portion 4B of the refrigerant circulation pipe 4, the refrigerant discharge pipe 17, and the joint pipes 8 and 8, so that the refrigerant circulation device 11 is not used. It can be detached from the trailer 1B according to local circumstances. With this configuration, there are many merits such as improving fuel efficiency by reducing the weight of the vehicle body, storing the refrigerant circulation device 11 in a good state, facilitating maintenance during storage and improving work time efficiency, The refrigerant circulation device 11 can be used for a long time.

DESCRIPTION OF SYMBOLS 1 Semi-trailer connection vehicle 2 Liquid storage tank 3 Tank body 4 Refrigerant circulation pipe 5 Heat insulating material 7 Feeding side connection pipe 9 Return side connection pipe 11 Refrigerant circulation device 12 Refrigerant flow box 13 Refrigerant induction box 15 Cooler 16 Blower

Claims (5)

A plurality of refrigerant circulation pipes are disposed in contact with the outer surface of the tank body that contains the cold-retaining liquid, and the entire outer surface of the tank body including the refrigerant circulation pipes is covered with a heat insulating material. A liquid storage tank mounted on a traveling or towed vehicle, and a refrigerant circulation device mounted on the vehicle and supplying a refrigerant to each of the refrigerant circulation pipes, wherein the plurality of refrigerant circulation pipes are the tank body. The refrigerant circulation device is arranged along the axis on the outer surface of the upper half of the refrigerant circulation box, the refrigerant circulation box in which the end of the return side connection pipe of each refrigerant circulation pipe is arranged on the lower side, and the refrigerant circulation box A cooler for cooling the refrigerant and the return refrigerant discharged from the terminal, a refrigerant induction box provided on an upper side in the refrigerant flow box, and connected to a base end of a feed-side connection pipe of each refrigerant circulation pipe; The refrigerant induction box and the cooler; It is disposed between the liquid cold-type tank truck comprising consist of a blower for feeding the refrigerant toward the refrigerant induction box inlet. By forcibly feeding the refrigerant in the refrigerant flow box by the blower, the refrigerant induction box is set to a positive pressure, and the refrigerant flow box is set to a negative pressure. 2. The liquid cold storage tanker according to claim 1, wherein the refrigerant in the refrigerant circulation pipe is circulated in a state where a pressure difference is formed between the start end side and the end side of the return side connecting pipe. The blower faces the refrigerant guide box and is disposed substantially in front of the refrigerant outlet of the cooler, and the end of the return side connecting pipe is spaced apart on both the left and right sides of the cooler and the refrigerant flow box The liquid cool tank lorry according to claim 1, wherein the liquid cool tank lorry is disposed in a lower portion of the inside. 2. The liquid cold storage tanker according to claim 1, wherein the refrigerant circulation device is detachably mounted on the vehicle by being connected to and separated from the refrigerant circulation pipes. 2. The liquid cold storage tanker according to claim 1, wherein the casing of the refrigerant induction box is provided with an upward concave curved surface for guiding the refrigerant.

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