CN217654146U

CN217654146U - Unit distribution box and cold chain system with same

Info

Publication number: CN217654146U
Application number: CN202121852588.5U
Authority: CN
Inventors: 陈金红
Original assignee: Zhejiang Xuebolan Technology Co Ltd
Current assignee: Zhejiang Xuebolan Technology Co Ltd
Priority date: 2021-04-30
Filing date: 2021-08-09
Publication date: 2022-10-25
Anticipated expiration: 2031-08-09

Abstract

The utility model provides a unit distribution box and a cold chain system with the same, wherein the unit distribution box comprises a storage chamber; the cold accumulation assembly comprises a cold accumulation box and a cold accumulation agent positioned in the cold accumulation box; the cold supply assembly comprises a cold supply pipe communicated with the cold storage box and a cold supply pump for driving the cold storage agent to circularly flow in the cold storage box and the cold supply pipe; part of the cold supply pipe is positioned at the top of the storage chamber; and the electric control unit is in communication connection with the cooling pump.

Description

Unit distribution box and cold chain system with same

Technical Field

The utility model relates to a logistics distribution technical field especially relates to a unit delivery case and have its cold chain system.

Background

Fresh produce transportation is becoming a bigger and bigger part of logistics, generally referred to as cold chain logistics, due to the need for refrigeration or freezing during its transportation.

In the prior art, CN204421452U discloses a one-stop type agricultural and super butt joint cold storage type refrigerator, which comprises a movable steel frame base, casters, a refrigerator box, a heat preservation partition plate, an air return end, an air exhaust end, a master control box, a storage battery, a temperature control regulator, a cold charging interface and a refrigerator door. The utility model discloses accessible refrigeration host computer fills cold for storing up cold medium, stores up cold medium and puts cold and realize cold-stored commodity circulation on the way in the transportation, specifically passes convulsions end, return air end through fan drive air and circulates between freezer case and installing zone, and the cold volume transmission that will store up cold medium and store up is for the freezer case.

However, the blower jolts along with the refrigerator box in the transportation process, so that the reliability is poor, the temperature control is unreliable, and the transported products can be damaged; in the whole transportation process, the fan consumes much power, the battery is slowly charged before the agricultural product base starts, and more time is needed to wait; and the fan is arranged in the air duct, and generates heat when working, thereby consuming the cold energy of the cold storage medium.

Accordingly, there is a need for an improved unit distribution box and a cold chain system having the same to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a unit delivery case and have its commodity circulation delivery car.

In order to solve one of the above technical problems, the utility model adopts the following technical scheme:

a unit dispensing box comprising: a storage chamber; the cold accumulation assembly comprises a cold accumulation box and a cold accumulation agent positioned in the cold accumulation box; the cold supply assembly comprises a cold supply pipe communicated with the cold storage box and a cold supply pump for driving the cold storage agent to circularly flow in the cold storage box and the cold supply pipe; part of the cold supply pipe is positioned at the top of the storage chamber; and the electric control unit is in communication connection with the cooling pump.

Further, the storage chamber is defined by a top wall, a side wall and a bottom wall, and part of the cold supply pipe is positioned on the top half part of the top wall and/or the side wall.

Further, the cooling assembly also comprises a water receiving strip positioned below the cooling pipe at the top; or, the cooling assembly further comprises a water receiving tray positioned at the top of the storage chamber, the water receiving tray comprises water receiving portions positioned below the cooling pipes and connecting portions for connecting the adjacent water receiving portions, and preferably, holes are formed in the connecting portions.

Further, a first end of the water receiving strip in the length direction is lower than a second end which is oppositely arranged; or the first end of the water receiving part in the length direction is lower than the second end which is arranged oppositely.

Furthermore, the cooling assembly also comprises a water chute which is positioned at the first end of the water receiving bar and is communicated with all the water receiving bars, and the water chute is provided with a discharge port for discharging condensed water outwards; or the cold supply assembly further comprises a water guide groove which is located at the first end of the water receiving part and is communicated with all the water receiving parts, and the water guide groove is provided with a discharge port for discharging condensed water outwards.

Further, a heat insulation plate is arranged between the cold accumulation assembly and the storage chamber, and the cold supply pipe penetrates through the heat insulation plate and extends into the storage chamber.

Further, the cold-storage subassembly is located the below of storing room, supply cold pipe including certainly the drain pipe that the cold-storage box upwards extended, with the cooling tube of drain pipe intercommunication, with cooling tube intercommunication and downwardly extending extremely the liquid return pipe of cold-storage box, the cooling tube is located the top of storing room.

Further, the storage chamber comprises a box body which is limited with the storage chamber, and a door body which opens or closes the storage chamber, and the liquid outlet pipe and the liquid return pipe are positioned at the lateral edge of the box body or on the side wall of the box body.

Furthermore, the storage chamber is formed by enclosing a top wall, side walls and a bottom wall, and the radiating pipes are distributed on the top wall in a snake shape or uniformly; and/or the radiating pipe is arranged on the upper half part of the side wall.

Further, the cooling assembly further comprises an indoor temperature sensor for detecting the indoor temperature of the storage room, and the indoor temperature sensor is in communication connection with the electronic control unit.

Furthermore, the cold accumulation assembly comprises a cold accumulation pipe penetrating in the cold accumulation agent, and an inlet and an outlet of the cold accumulation pipe are exposed outside the cold accumulation box.

Furthermore, the cold accumulation assembly also comprises a temperature measurement assembly, and the temperature measurement assembly comprises at least one temperature sensor arranged at intervals with the cold accumulation pipe along the radial direction of the cold accumulation pipe; or the temperature measuring assembly comprises at least two temperature sensors arranged around the cold storage tube, and the distances from the at least two temperature sensors to the cold storage tube along the radial direction of the cold storage tube are different; or, the temperature measurement assembly comprises at least two temperature sensors arranged around the cold storage tube, the at least two temperature sensors are distributed at intervals along the extension direction of the cold storage tube, and the distance between every two adjacent temperature sensors is not smaller than a first distance threshold value.

Further, unit distribution case includes the box, the storing room with the cold-storage subassembly is located in the box, the outside of box is equipped with accepts the chamber, the motor that supplies the cold pump is located accept the intracavity.

Furthermore, the unit distribution box also comprises a battery assembly, and the battery assembly is electrically connected with the cooling assembly and the electric control unit.

A logistics distribution vehicle or a cold chain system comprises the unit distribution box.

The utility model has the advantages that: the utility model discloses a unit delivery case, through the liquid coolant circulation of cooling pump drive flow for the storing room cooling, the cold volume that liquid secondary refrigerant carried is bigger than the air, after the cooling pump shut down, the coolant that is arranged in the cooling pipe in the storing room still can keep the low temperature of long time, and continuously give the storing room cooling, consequently only need work very short time at the cooling pump, just can make the storing room maintain in the temperature of settlement for a long time.

Drawings

Fig. 1 is a schematic view of a cold storage assembly according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of a cold storage assembly according to another preferred embodiment of the present invention;

FIG. 3 is a schematic view of a cold storage assembly in accordance with another preferred embodiment of the present invention;

fig. 4 is a perspective view of the cold storage device of fig. 3;

FIG. 5 is a schematic view of FIG. 4 taken along an axis perpendicular to the inner tube 53;

fig. 6 is a schematic view of the phase change sequence at various points in the cold storage device of fig. 5;

FIG. 7 isbase:Sub>A cross-sectional view taken along A-A of FIG. 5;

fig. 8 is a schematic view of a cold storage device according to another embodiment of the present invention from the perspective of fig. 6;

fig. 9 is a schematic view of a cold storage assembly according to another preferred embodiment of the present invention;

fig. 10 is an enlarged view of portion B of fig. 9;

fig. 11 is a schematic diagram showing a positional relationship between the temperature sensor and the cold storage device in the embodiment of the present invention;

fig. 12 is a schematic view showing a positional relationship between a temperature sensor and a cold storage device according to another embodiment of the present invention;

fig. 13 is a schematic view of a cold storage assembly in accordance with another preferred embodiment of the present invention;

fig. 14 is a schematic view of a cold storage assembly in accordance with another preferred embodiment of the present invention;

fig. 15 is a schematic view of a charger according to a preferred embodiment of the present invention;

fig. 16 is an enlarged view of portion C of fig. 15;

FIG. 17 is a schematic view of a unit dispensing box according to a preferred embodiment of the present invention;

fig. 18 is a schematic view of the interior cold storage tube member of fig. 17 shown in phantom;

FIG. 19 is a cross-sectional view taken along D-D of FIG. 18;

fig. 20 is a flow chart of a cold accumulation method according to a preferred embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.

In the various drawings of the present invention, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration, and thus, are used only to illustrate the basic structure of the subject matter of the present invention.

For convenience of description, the lower and upper sides are defined according to the orientation of the cold storage assembly during actual use.

As shown in fig. 1 to 14, the cold storage assembly 100 of the present invention includes a cold storage box 1 having a heat preservation function, a cold storage agent 11 located in the cold storage box 1, a cold storage tube 3 penetrating the cold storage agent 11, an inlet 31 and an outlet 32 of the cold storage tube 3 exposed outside the cold storage box 1, specifically, the inlet 31 and the outlet 32 are disposed on the cold storage box 1 or protruding out of the cold storage box 1, so as to be convenient for docking with a cold supply unit or a cold demand unit from the outside.

When the cold carrier medium flows through the cold storage tubes 3, the cold carrier medium having a temperature lower than that of the cold storage agent 11 supplies cold to the cold storage agent 11 and stores the cold in the cold storage agent 11, which is called cold storage. The cold-carrying medium may be a refrigerant of the refrigerating unit 22, or may be a cold-carrying medium provided by another cold storage assembly 100 with a larger power.

In order to increase the cold accumulation speed and shorten the cold accumulation time, a plurality of radiating fins are arranged on the outer side of the cold accumulation tube 3, and the contact area of the cold accumulation tube and the cold accumulation agent 11 is increased.

Further, the cold storage assembly 100 further includes at least one cold storage device 5 soaked in the cold storage agent 11, the cold storage tube 3 is inserted into the cold storage agent 11 but does not pass through the cold storage device 5, a cold storage material is sealed in the cold storage device 5, the cold storage material is different from the cold storage agent 11, and both of the cold storage material and the cold storage agent can store cold. Preferably, the freezing point of the cold accumulation material is higher or lower than that of the cold accumulation agent 11, and two-stage cold accumulation can be achieved.

Further, the cold storage assembly 100 further includes at least one cold storage device 5 soaked in the cold storage agent 11, and unlike the above embodiment, the cold storage tube 3 is inserted into the cold storage agent 11 and passes through the cold storage device 5.

In one class of embodiments, the cold storage device 5 includes a housing, and a cold storage material sealed in the housing, and the cold storage tube 3 is inserted into the housing.

The shell is provided with a cold storage cavity 52, and the cold storage material is stored in the cold storage cavity 52. The utility model discloses a cold-storage material is preferably phase change material, can save or release a large amount of energy at the phase transition in-process. The addition amount of the cold storage material is as follows: when the cold storage material is in a liquid state, the volume of the cold storage material is not more than 80% of the volume of the cold storage cavity 52, and the cold storage device 5 cannot deform or crack due to the increase of the volume when the phase change of the cold storage material occurs.

The cold carrier medium flows in from the inlet 31 of the cold storage tube 3 and then flows out from the outlet 32 of the cold storage tube 3, and exchanges heat with the cold storage material and the cold storage agent 11 during flowing. Preferably, the inlet 31 of the cold storage tube 3 is connected to the bottom of the cold storage device 5, the outlet 32 of the cold storage tube 3 is connected to the top of the cold storage device 5, and cold energy is supplied from bottom to top, so that the cold storage material at the bottom obtains cold energy first and undergoes phase change, and the liquid cold storage material is located above the solid cold storage material, thereby avoiding the deformation or rupture of the cold storage device 5. More preferably, the cold storage tubes 3 are spirally or snakelike arranged from bottom to top, so that the heat exchange area is enlarged.

In another class of embodiments, the cold storage device 5 includes a housing 51, a cold storage chamber 52 surrounded by the housing 51, and an inner tube 53 penetrating the housing 51 and passing through the cold storage chamber 52, wherein the cold storage material is located in the cold storage chamber 52; the cold storage tube 3 is arranged in the inner tube in a penetrating way, and the cold storage tube 3 is not in direct contact with the cold storage material at the moment, so that the cold storage tube can be prevented from being corroded by the cold storage material, and the selection range of the cold storage material is expanded.

Preferably, the cold storage tube 3 is in close contact with the inner tube 53, that is, the two are attached without a gap in the error range of the production and assembly process, so that the cold energy of the cold-carrying medium is directly transmitted to the inner tube through the cold storage tube 3 and is transmitted to the cold storage material by the inner tube, the heat transmission is performed through liquid-solid transmission, the thermal resistance is small, the heat loss is small, and the heat exchange speed is high.

As shown in fig. 3 to 8, the housing 51 includes an outer tube 511, and end caps 512 for closing both ends of the outer tube 511, and the end caps 512 may be any structure for closing both ends of the outer tube 511. The end cover 512 is provided with a through hole 5121 for the inner tube 53 to pass through, the through hole 5121 of the end cover 512 is sleeved on the inner tube 53, and then the connection part of the end cover 512 and the inner tube 53 is sealed in a welding mode and the like, so that the process is convenient to manufacture. Meanwhile, the end cap 512 and/or the outer tube 511 are provided with a filling port (not shown) for filling the cold storage chamber 52 with a cold storage material, and after the cold storage material is filled, the filling port is sealed by a sealing member 5122.

Further, the cold storage device 5 further includes a heat conduction sheet 54 located in the cold storage chamber 52, and the heat conduction sheet 54 is in contact with at least one of the outer shell 51 or the inner tube 53.

The heat conducting fins 54 include heat conducting fins 541 in contact with both the inner tube 53 and the outer shell 51, and the heat conducting fins 541 support and fix the inner tube 53 and enable the inner tube 53 and the outer shell 51 to perform rapid heat exchange, so that the inner tube 53 and the outer shell 51 perform heat exchange with the cold storage material in the cold storage cavity 52 from the inner side and the outer side, respectively, and the heat exchange efficiency is improved.

The thickness of the heat transfer sheet 541 is not less than 1.5mm, preferably between 1.5mm and 2mm, the heat transfer sheet 541 has sufficient strength to support and fix the inner tube 53, and the heat conduction sheet 54 with the thickness has low thermal resistance, so that the thermal attenuation of the heat transfer sheet 541 can be effectively reduced.

The outer tube 511 has a first end and a second end located at opposite sides of a central axis thereof, and the heat-conducting fin 54 includes two heat-conducting fins 541 extending toward the first end and the second end, respectively, and the two heat-conducting fins 541 divide the cold storage chamber 52 into two sub cold storage chambers 521 symmetrically arranged. The cold accumulation device 5 further comprises a communication channel 55 for communicating at least two of the sub cold accumulation cavities 521; the sub cold storage cavities 521 are communicated, when the cold storage material obtains cold and undergoes phase change to expand in volume, for example, the cold storage material changes from liquid to solid, the liquid cold storage material can flow in the adjacent sub cold storage cavities 521 through the communication channel 55, the pressure of the single sub cold storage space 521 is released, and the cold storage device 5 is prevented from deforming or bursting. Preferably, the communication passage 55 is provided at a port of the heat transfer sheet 541 in the axial direction of the outer tube 511.

Further, the heat conducting fin 54 further includes a heat dissipating fin 542 located in the cold sub-storage chamber 521, and the heat dissipating fin 542 is connected to the inner tube 53 but spaced apart from the outer tube 511. In a direction from one heat transfer sheet 541 to another heat transfer sheet 541 disposed adjacent thereto, the arrangement density of the plurality of heat dissipation fins 542 decreases, and/or the length of the heat dissipation fins 542 decreases. Therefore, the heat dissipation fins 542 have a large sum of heat transfer areas of the heat dissipation fins 542 in the region with large density or long length, and the region with large heat transfer area is firstly changed in phase and then changed in phase in the region with small heat transfer area; so that the phase change of the cold storage material gradually occurs along the arrow direction shown in fig. 6, and the cold storage device 5 is prevented from deforming or cracking. Further, the thickness of the heat-conducting sheet 54 is gradually reduced along the circumferential direction of the inner tube 53, and the greater the thickness of the heat-conducting sheet, the smaller the thermal attenuation thereof, the smaller the thermal resistance thereof, and the faster the heat transfer rate, thereby achieving the above-described technical effects.

The above-mentioned "decrease" means that there is a decreasing tendency in the unit volume, and may be a continuous decrease, an equal difference decrease or a gradual decrease, and the like.

Preferably, the heat dissipation fins 542 located in the two sub cold storage chambers 521 are symmetrically disposed with respect to the heat transfer fin 541. Therefore, from the first end to the second end, the phase change speeds of the cold accumulation liquids in the two sub cold accumulation cavities 52 are the same, that is, the phase change speeds of the cold accumulation liquids on the two sides of the two heat transfer sheets 541 are substantially the same, so that the heat transfer sheets 541 can be prevented from being deformed or broken.

Referring to fig. 5 and 6, the cool storage material at each point in the cool storage cavity 52 obtains cool or heat from the inner tube 53, the heat conducting fin 54, and the outer tube 511 adjacent to the cool storage material, and the arrows in fig. 6 illustrate the order of obtaining energy at different points. In the using process, when the cold accumulation device 5 is installed, the side of the heat conducting sheet 54 with the higher density is required to be arranged at the lower part, and the side of the heat conducting sheet 54 with the lower density is arranged at the upper part, so that the liquid or gaseous cold accumulation material flows upwards, and the tube expansion is avoided.

As shown in fig. 4 to 7, the central axis of the inner tube 53 coincides with the central axis of the outer tube 511, so that the entire cold storage device 5 is relatively balanced, easy to manufacture and long in service life. Referring to fig. 8, the central axis of the inner tube 53 deviates from the central axis of the outer tube 511 and is offset toward the first end, and the heat exchange speed between the cool storage material located at the first end and the inner tube 53 is faster than the heat exchange speed between the cool storage material located at the second end and the inner tube 53.

In the specific use process, the first end of the cold accumulation cavity 52 is arranged at the lower part, and the second end is arranged at the upper part, so that the liquid or gaseous cold accumulation material flows upwards, and the tube expansion is avoided. Further, the outer wall of the housing 51 has a mark indicating the first end and/or the second end; the cold storage device 5 plays a role in prompting when being installed.

In addition, based on all the above embodiments, the inner tube 53, the heat conducting fins 54 and the outer tube 511 are integrally formed or integrally arranged, so that the heat transfer effect is far better than that of the post-assembly scheme. And the preferred aluminum or aluminum alloy material has light weight and high heat transfer speed.

The cold-carrying medium flows in from the inlet 31 of the cold-storage tube 3 and then flows out from the outlet 32 of the cold-storage tube 3, and exchanges heat with the cold-storage devices 5 arranged on the cold-storage tube 3 in the flowing process.

Preferably, the plurality of cold accumulation devices 5 are arranged in a plurality of layers along the up-down direction, the cold accumulation tubes 3 are sequentially connected with each layer of cold accumulation device 5 in series from the bottom to the top, and the inlet 31 of the cold accumulation tube 3 is connected to the inner tube of one cold accumulation device 5 which is positioned in the row at the bottom. The cold-carrying medium sequentially passes through the cold accumulation devices 5 in each row from bottom to top and exchanges heat with the cold accumulation devices 5, the cold accumulation devices 5 in the next row obtain cold energy before the cold accumulation devices 5 in the previous row, and the cold accumulation devices 5 in the lower row can provide cold energy for the cold accumulation devices 5 above the cold accumulation devices in a heat radiation or contact heat transfer mode, so that the phase change of the cold accumulation material at the middle lower part of the cold accumulation devices 5 is ensured before the phase change of the cold accumulation material at the upper part of the cold accumulation devices 5, and the phenomenon that the cold accumulation devices 5 deform or break is avoided.

Further, the cold accumulation assembly 100 also comprises a cold accumulation temperature sensor which is in communication connection with the electronic control unit 7 to detect the temperature of the cold accumulation device 5, the cold accumulation temperature sensor and the electronic control unit 7 is in communication connection. Specifically, the cold accumulation temperature sensor is used for directly or indirectly measuring the temperature of the cold accumulation material, so that the state of the cold accumulation material can be conveniently judged.

The cold accumulation temperature sensor is fixed on the outer side of the cold accumulation device 5, and indirectly judges the temperature of the cold accumulation material in the cold accumulation device after the temperature of the outer side is corrected; or the cold accumulation temperature sensor is fixed on the inner side of the cold accumulation device 5, so that the temperature of the cold accumulation material is directly measured, and the measurement is more accurate.

Further, the cold storage assembly 100 further comprises a temperature measurement assembly in communication connection with the electronic control unit 7 to detect the temperature of the cold storage agent 11, so as to determine the temperature and state of the cold storage agent 11, and the temperature measurement assembly can be fixed on the cold storage tube 3, the cold storage device 5 or the cold storage box 1.

The cold storage method of the above cold storage assembly 100 will be described in detail below, and mainly includes controlling the points of starting cold storage and ending cold storage.

In the embodiment without the cold storage device 5, cold storage can be started at any time.

In the embodiment with the cold storage device 5, the inventor has studied and found that when the cold storage material in the cold storage device 5 is in a solid-liquid mixed state; the solid cool storage material is usually located at the upper part of the cool storage cavity 52 due to the low density, or due to the arrangement of the structure in the cool storage cavity 52, the solid cool storage material may also be located at the middle position of the cool storage cavity 52; when the cold storage device 5 is cooled in this state, the solid cold storage material acts as a crystal nucleus, and the surrounding phase thereof is changed first, which tends to cause deformation or breakage of the cold storage device 5.

Referring to fig. 20, the cold storage method of the present invention includes the following steps: before cold accumulation, the temperature T of the cold accumulation material in the cold accumulation device 5 is obtained; judging that the temperature T is higher than the freezing point temperature T0 of the cold accumulation material, and if so, starting cold accumulation; if not, the temperature T of the cold accumulation material is periodically acquired. The method can ensure that the cold storage material is completely in a liquid state before cold storage begins, so that phase change can be carried out according to a preset phase change direction, and the phenomena of tube cracking and tube expansion are avoided.

Specifically, the temperature T1 of the cold storage device 5 is obtained by a cold storage temperature sensor fixed to the outside of the cold storage device 5, and the temperature deviation Δ T of the outside of the cold storage device 5 from the internal cold storage material, whose temperature T = temperature T1+ temperature deviation Δ T, is counted and corrected according to a large number of experiments. In general, the temperature deviation Δ T is smaller as the thermal conductivity of the case of the cold storage device 5 is larger. When the case is made of a metal material such as aluminum or aluminum alloy, the temperature deviation Δ T is small, and the temperature T1 can be regarded as the temperature of the cool storage material in the cool storage device 5 under the use condition that the temperature requirement is not strict. The temperature T of the cold accumulation material can be directly obtained through the cold accumulation temperature sensor fixed in the cold accumulation device 5, and the measurement value is more accurate.

Further, in order to avoid inaccurate temperature measurement caused by uneven temperature of the cold storage material, when the temperature T is higher than the freezing point temperature T0 of the cold storage material by a first temperature threshold value, the cold storage is started again, and the cold storage material is ensured to be completely liquid. In a preferred embodiment, the first temperature threshold is between 0.5 ℃ and 5 ℃, preferably between 2 ℃ and 3 ℃, for example 3 ℃.

Further, if the temperature T is not higher than the freezing point temperature T0 of the cold storage material, the step of releasing cold is started until the temperature T is higher than the freezing point temperature T0 of the cold storage material, and the solid cold storage material is enabled to be completely converted into the liquid cold storage material.

The method for judging the cold accumulation stopping based on the amount of cold accumulation is based on the requirement, and the method comprises but is not limited to the following steps:

in the first embodiment, whether to stop cold accumulation is judged by the cold accumulation time, and the cold accumulation device 5 is applicable to the case of existence or nonexistence.

As shown in fig. 20, after the cold accumulation is started, the cold accumulation is terminated when the integrated cold accumulation time reaches a time threshold t 0. Preferably, the time threshold t0 is between 1 hour and 3 hours, and when the cold accumulation assembly 100 is used on the unit distribution box 400 with the storage chamber 41, the cold accumulation assembly 100 accumulates cold energy to maintain the temperature of the storage chamber 41 within the set temperature range for 6 hours to 100 hours.

In the second embodiment, the cold accumulation is stopped or not judged according to the temperature of the cold accumulation material, and the cold accumulation device 5 is suitable for the situation.

As shown in fig. 20, after the cold accumulation is started, the temperature T of the cold accumulation material is obtained, whether the temperature T is lower than the freezing point temperature T0 of the cold accumulation material is judged, and if yes, the cold accumulation is finished; if not, the cold accumulation is continued. The method ensures that the cold storage material is completely changed from liquid state to solid state, and a large amount of cold energy is stored through the phase change process.

Preferably, the temperature T is judged to be lower than the freezing point temperature T0 of the cold accumulation material by a second temperature threshold value, and if yes, the cold accumulation is finished; if not, continuing to store cold; the second temperature threshold is 2-5 ℃, so that the judgment error caused by nonuniform temperature of the cold storage material, measurement error and the like can be avoided.

In the third embodiment, whether to stop cold accumulation is judged by the crystal thickness of the cold accumulation agent 11 on the surface of the cold accumulation tube 3 or the cold accumulation device 5, and the method is suitable for the case of the presence or absence of the cold accumulation device 5.

In the embodiment without the cold storage device 5, during the cold storage process, the cold storage 11 close to the cold storage tubes 3 obtains cold energy before the cold storage 11 far from the cold storage tubes 3, and when the temperature of the cold storage 11 is reduced to the freezing point, the phase change starts to occur at the cold storage tubes 3. When the thickness of the solid coolant 11 reaches a certain degree, the transmission of the cooling energy of the cold storage tubes 3 to the external liquid coolant 11 is hindered to a certain extent, so that the external coolant 11 does not become solid quickly. It is also possible to provide a stirring device in the cold storage tank 1 to drive the flow of the cold storage agent 11 to perform rapid heat exchange with the cold storage tubes 3.

The cold accumulation method comprises the following steps: the cold storage agent 11 is stored by the cold storage pipe 3 which is arranged in the cold storage agent 11 in a penetrating way; obtaining the thickness d1 of the solid coolant 11 crystallized on the surface of the cold storage tube 3; judging whether the thickness d1 of the solid coolant 11 reaches a thickness threshold value d0, if so, stopping cooling; if not, the thickness d1 of the solid coolant 11 is periodically acquired.

The thickness threshold d0 is set at least by the following factors: the amount of the residual liquid coolant 11 is that the coolant 11 is partially crystallized to accumulate enough cold energy, but a part of the coolant 11 is still in a liquid state, so that the cold energy is conveniently transmitted to a unit needing cooling; the influence of the solid coolant 11 on the heat transfer of the coolant 11 on the outside is determined.

In one embodiment, the thickness threshold value is 1cm to 4cm, preferably 2cm, the solid coolant 11 with the thickness affects the outward transmission of the cooling capacity of the cold storage tube 3, and the speed of the external coolant 11 continuously acquiring the cooling capacity has a very obvious reduction trend.

In another embodiment, when the regenerator tubes 3 are arranged in a zigzag, serpentine or spiral shape, the thickness threshold d0 is not greater than one half of the distance between two adjacent regenerator tube 3 sections in the radial direction of the regenerator tube 3; if the temperature exceeds one half, the crystallization of the cold storage agent 11 is affected by another adjacent cold storage tube 3 section. Preferably, the thickness threshold d0 is 0.2-0.4 of the distance between two adjacent sections of the cold storage tubes 3, and after the thickness of the cold storage agent 11 reaches the thickness threshold d0, the cold storage is not continued, so that a sufficient amount of the liquid cold storage agent 11 is reserved.

In the embodiment with the cold storage device 5, the cold of the cold storage tubes 3 is first transferred to the cold storage device 5 and then to the cold storage agent 11 outside through the cold storage device 5, in which case said cold storage agent 11 crystallizes on the surface of the cold storage device 5.

The cold accumulation method comprises the following steps: cold accumulation is carried out on the cold accumulation device 5 and a cold accumulation agent 11 soaking the cold accumulation device 5 through a cold accumulation pipe 3 penetrating in the cold accumulation device 5; acquiring the thickness d1 of the solid coolant 11 crystallized on the surface of the cold accumulation device 5, judging whether the thickness d1 of the solid coolant 11 reaches a thickness threshold value d0, and if so, stopping cold accumulation; if not, the thickness d1 of the solid coolant 11 is periodically acquired. At this time, the cold storage agent 11 also stores a part of the cold, but a part of the cold storage agent is in a liquid state and can circulate to charge the cold charge tank with cold.

The thickness threshold d0 is set in the same manner as in the above-described embodiment. Specifically, the thickness threshold value d0 is not more than one-half of the distance between two cold storage devices 5 adjacent in the radial direction, preferably between 0.2 and 0.4. Or, the thickness threshold is 2cm.

In the above method, the thickness d1 of the solid coolant 11 is obtained by the thickness sensor located in the cold storage tank 1, the thickness sensor is fixed on the cold storage tank 1 and the cold storage tube 3, and in the embodiment with the cold storage device 5, the thickness sensor can also be arranged on the cold storage device 5. The thickness sensors include, but are not limited to: acoustic wave sensors, infrared sensors, pressure sensors.

In the fourth embodiment, whether or not cold accumulation is stopped is determined by the crystal amount of the cold storage agent 11, and this is applied to the case with or without the cold storage device 5.

The cold accumulation method comprises the following steps: the cold storage agent 11 is cooled through the cold storage pipe 3 arranged in the cold storage agent 11, or the cold storage device 5 and the cold storage agent 11 soaking the cold storage device 5 are cooled through the cold storage pipe 3 arranged in the cold storage device 5; acquiring the amount n1 of the solid cold-storage agent 11 formed by crystallization; judging whether the amount n1 of the solid cold-storage agent 11 reaches a crystallization amount threshold value n0, if so, stopping cold storage; if not, the amount n1 of the solid coolant 11 is periodically acquired.

Setting of crystal amount threshold n 0: the cold storage agent 11 is partly crystallized, sufficient cold energy is stored, but a part of the cold storage agent 11 is still in a liquid state, so that the cold energy is conveniently transmitted to a cold-requiring unit. For example, the crystal amount of the coolant 11 is not more than 30 to 50% of the total amount thereof. Of course, the thickness threshold d0 in the third embodiment may be set and converted into the crystal amount threshold according to the surface area of the cold storage tubes 3 and the cold storage device 5.

In one embodiment, the volume V0 of the coolant 11 before the start of cold accumulation is obtained; acquiring the volume V1 of a coolant 11 in the cold accumulation process in real time; the amount n1 of the solid coolant 11 is calculated from the volume difference V1-V0.

Specifically, the cold storage device further comprises a liquid level meter communicated with the cold storage tank 1, and the liquid level meter can be used for detecting the loss of the cold storage agent 11 and timely replenishing the cold storage agent 11 on one hand; on the other hand, the liquid level H0 before cold accumulation and the liquid level H1 in the cold accumulation process are obtained through the liquid level meter; and calculating the volume difference V1-V0 through the liquid level difference H1-H0.

In order to simplify the judgment, the cold accumulation is stopped when the liquid level difference H1-H0 reaches the liquid level difference threshold value. Or before the cold accumulation is started, filling the cold accumulation agent 11 into the cold accumulation box 1 until the cold accumulation agent reaches a first preset liquid level, namely filling the cold accumulation agent 11; in the cold accumulation process, the liquid level H1 of the cold accumulation agent 11 is obtained, and when the liquid level H1 reaches a second preset liquid level, the cold accumulation agent 11 reaches the maximum allowable crystallization amount, and the cold accumulation is stopped.

When the multi-component compound coolant 11 is selected, the coolant is in an ice slurry state after being crystallized, and the solid coolant 11 and the liquid coolant 11 have no clear boundary line, so that the cold accumulation end point is judged in a mode of judging the crystallization amount more appropriately. Of course, this method is also applicable to the one-component coolant 11.

In the fifth embodiment, whether to stop cold accumulation is judged by the temperature of the cold accumulation agent 11, and the method is suitable for the case with or without the cold accumulation device 5.

In the embodiment without the cold storage device 5, as shown in fig. 1-2, the temperature measuring assembly includes at least one temperature sensor disposed along the radial direction of the cold storage tube 3 and spaced from the cold storage tube 3 and in communication connection with the electronic control unit 7; at least one temperature threshold To corresponding To each temperature sensor is set in the electronic control unit 7.

The term "the temperature sensor is spaced from the cold storage tube 3" means that the temperature sensing element of the temperature sensor is spaced from the cold storage tube 3, and is used to measure the temperature of the cold storage agent 11 away from the cold storage tube 3 by a distance, and further to determine the crystallization state of the cold storage agent 11 and the temperature after crystallization, so as to determine the cold stored in the cold storage assembly 100, and to precisely control the cold storage process. The temperature sensor is fixed on the cold accumulation pipe 3 or the cold accumulation box 1.

Preferably, the cold storage tubes 3 are arranged in a zigzag shape, a serpentine shape or a spiral shape, and the distance between the temperature sensor and the cold storage tube 3 is not greater than one half of the distance between two adjacent cold storage tube 3 sections in the radial direction of the cold storage tube 3. If the temperature exceeds one-half, the coolant 11 is affected by another adjacent segment of the regenerator tube 3. Preferably, the distance between the temperature sensor and the cold storage tube 3 is 0.2-0.4 of the distance between two adjacent cold storage tube 3 sections in the radial direction of the cold storage tube 3, and after the cold storage agent 11 at the position of the temperature sensor is crystallized, the cold storage is not continued, so that a sufficient amount of liquid cold storage agent 11 is reserved, and the cold storage tank or the storage chamber 41 is cooled. Preferably, the distance between the temperature sensor and the regenerator tube 3 is not more than one fifth of the distance between two radially adjacent regenerator tube 3 sections along the regenerator tube 3.

The temperature sensor is disposed at a position close to the outlet 32, for example, a distance from the outlet 32 in the extending direction of the regenerator 3 is not greater than a threshold distance, preferably not greater than 20cm. The cooling medium flows from the inlet 31 to the outlet 32, the temperature of the cooling medium being higher closer to the outlet 32 and thus closer to it

When the temperature of the coolant 11 at the outlet 32 is lowered to a target value, the temperature of the coolant 11 at other positions is also lowered to the target value.

In the embodiment with the cold storage device 5, as shown in fig. 3 to 12, the difference from the cold storage device 5 is only that: the temperature measurement component comprises at least one temperature sensor which is arranged around any cold accumulation device 5 and is arranged at intervals with the cold accumulation device. The temperature sensor is fixed to the cold storage device 5 or the cold storage tank 1.

Preferably, the temperature sensor is located around the cold storage device 5 closest to the outlet 32 in the extending direction of the cold storage tubes 3, and measures the temperature of the cold storage agent 11 in the region where the temperature decrease is slowest.

As shown in fig. 9 to 12, the distance between the temperature sensor and the cold storage device 5 is not more than one half, preferably 0.2 to 0.4, of the distance between the cold storage device 5 and the cold storage device 5 adjacent thereto.

For the two embodiments, the cold storage method comprises the following steps: the method comprises the steps that cold storage is carried out on a cold storage agent 11 through a cold storage pipe 3 penetrating through the cold storage agent 11, and the temperature Ta of the cold storage agent 11 is obtained through a temperature sensor arranged at a radial interval with the cold storage pipe 3; or the cold accumulation device 5 and the cold accumulation agent 11 soaking the cold accumulation device 5 are cooled through the cold accumulation pipe 3 penetrating the cold accumulation device 5, and the temperature Ta of the cold accumulation agent 11 is obtained through a temperature sensor arranged at an interval with the cold accumulation device 5; judging whether the temperature Ta reaches at least one of a plurality of temperature threshold values To corresponding To the temperature sensor, if so, stopping cold accumulation; if not, the temperature Ta is periodically acquired.

In the cold accumulation process, the temperature of the cold accumulation agent 11 is gradually reduced to the freezing point, and after the cold accumulation agent 11 is crystallized, the temperature of the solid cold accumulation agent 11 is continuously reduced. Therefore, the temperature of the coolant 11 decreases to different degrees, representing different amounts of stored cold, and the lower the temperature, the more amount of stored cold.

Preferably, the plurality of temperature threshold values To are different, and at least one temperature threshold value To is lower than the freezing point of the coolant 11, and when the temperature of the coolant 11 is lowered To the temperature threshold value, the coolant 11 is completely crystallized, and a large amount of cold energy is accumulated through a phase change process.

The sixth embodiment, which judges whether or not to stop cold accumulation based on the temperature of the coolant 11, differs from the fifth embodiment only in that: the cold accumulation amount of the cold accumulation agent 11 is judged by at least two temperature sensors having different distances from the cold accumulation tube 3, and is suitable for the case of the presence or absence of the cold accumulation device 5.

In the embodiment without the cold storage device 5, as shown in fig. 1-2, the temperature measuring assembly includes at least two temperature sensors, and the at least two temperature sensors have different distances from the cold storage tube 3 along the radial direction of the cold storage tube 3.

During the cold storage, the coolant 11 gradually crystallizes outward from the cold storage tubes 3, and during the cold storage, the temperature of the coolant 11 decreases faster at a position having a small distance from the cold storage tubes 3 than at a position having a large distance from the cold storage tubes 3. Therefore, when the temperature of the coolant 11 at different points falls below the corresponding temperature threshold To, it indicates that the amount of cold stored is different.

Along the extension direction of the cold accumulation tube 3, the distance between two adjacent temperature sensors is not greater than a first distance threshold value; the influence of the sequence and the speed difference of the cold storage agent 11 acquiring the cold quantity along the extension direction of the cold storage tube 3 on the temperature detection of the cold storage agent 11 can be reduced or avoided.

Preferably, the first distance threshold is not greater than 15cm, and most preferably, as shown in fig. 1, the at least two temperature sensors are located at the same position point in the extending direction of the regenerator 3.

The at least two temperature sensors are in an arithmetic progression or a non-arithmetic progression along the radial direction of the cold accumulation pipe 3 to the distance difference of the cold accumulation pipe 3, and can be adjusted adaptively according to the actual requirement and the difference between two cold accumulation gears.

In addition, the position relationship between the temperature sensor and the regenerator 3 along the radial direction and the axial direction of the regenerator 3 is the same as that of the fifth embodiment, and the description thereof is omitted. In the embodiment with the cold storage device 5, the temperature measuring assembly comprises at least two temperature sensors arranged around any cold storage device 5, and the distances from the at least two temperature sensors to the cold storage device 5 are different. The differences from the above-described embodiment are: the temperature sensor is located on the outer peripheral side of the cold storage device 5.

The distance between the temperature sensor and the cold storage device is not more than one half, preferably 0.2 to 0.4, and more preferably not more than one fifth of the distance between the cold storage device 5 and the cold storage device 5 adjacent thereto.

The temperature sensor is located around the cold storage device 5 closest to the outlet 32.

The distance difference between the at least two temperature sensors and the cold accumulation pipe 3 or the cold accumulation device 5 can be in an arithmetic progression or a non-arithmetic progression.

As shown in fig. 10, at least two temperature sensors are spaced apart from each other in the radial direction of the regenerator 3. Specifically, the temperature sensors are provided at a plurality of points such as A, B, C, which are located at different distances from the center of the regenerator 3, with the center being the axis. Wherein, the distance between the point C and the two adjacent cold accumulation devices 5 is L, and the point A is faster than the point B and is faster than the point C in view of the crystallization speed.

In addition, the cold storage tubes 3 and the cold storage devices 5 share the same axis, 3 circumscribed circles respectively taking the axes of the three adjacent cold storage devices 5 as the center of a circle and taking a half of the distance between the axes of the two adjacent cold storage devices 5 as the radius enclose a central area similar to a triangle, and at least one temperature sensor can be arranged in the central area, for example, in the central point D of the central area. When the coolant 11 at the point D crystallizes, the amount of crystallization of the coolant 11 reaches the maximum value.

Of course, as shown in fig. 11, at least two temperature sensors may be disposed along different radial directions of the regenerator 3, such as a ', B ', C ' and so on. The distance from point C 'to the cold storage device 5 is the same as the distance from point D to the cold storage device 5 in fig. 10, and point a' is faster than point B 'than point C' in terms of crystallization speed.

As viewed in the axial direction of the cold storage device 5, at least two temperature sensors may be located at the same position, or may be axially distributed at a plurality of different positions, such as a ", B", and C ", as shown in fig. 12, these points are located on the same cold storage device 5, and are less affected by the temperature change of the cold-carrying medium along the extending direction of the cold storage tubes 3.

Based on the two embodiments, the cold accumulation method comprises the following steps:

the method comprises the steps that cold storage is carried out on a cold storage agent 11 through a cold storage pipe 3 penetrating through the cold storage agent 11, and the temperature Ta of the cold storage agent 11 is obtained through any one of at least two temperature sensors with different distances from the cold storage pipe 3 along the radial direction of the cold storage pipe 3; or, the cold storage device 5 and the cold storage agent 11 soaking the cold storage device 5 are stored cold through the cold storage tube 3 penetrating the cold storage device 5, and the temperature Ta of the cold storage agent 11 is obtained through any one of at least two temperature sensors with different distances from the cold storage device 5 penetrating the cold storage tube 3 along the radial direction of the cold storage tube 3; judging whether the temperature Ta reaches a temperature threshold To corresponding To the temperature sensor, if so, stopping cold accumulation; if not, periodically acquiring the temperature Ta.

The temperature of the cold accumulation agent 11 is obtained by at least two temperature sensors with different distances from the cold accumulation pipe 3 along the radial direction of the cold accumulation pipe 3, on one hand, the cold accumulation gear of the cold accumulation assembly 100 is diversified, so that the proper temperature sensor is selected for measuring the temperature according to the required cold quantity, and the crystallization state of the cold accumulation agent 11 and the temperature after crystallization are judged according to the temperature, so that the cold quantity accumulated by the cold accumulation assembly 100 is judged, and the cold accumulation process is accurately controlled; on the other hand sets up two at least temperature sensor, when a temperature sensor has the error, can pass through other sensor auxiliary judgments, in time the loss of stopping.

The temperature thresholds To corresponding To the temperature sensors having different distances To the regenerator 3 are the same, and the amount of cold stored when the coolant 11 reaches the temperature thresholds To at the positions having different distances from the regenerator 3 is different. For example, when the temperatures of the point a, which is closer To the cold storage pipe 3,A than the point B, reach the same temperature threshold To, respectively, the cold stored in the cold storage agent 11 are the first cold and the second cold, respectively; the first refrigeration capacity is less than the second refrigeration capacity. The user can select the temperature sensor at the proper position to acquire the temperature of the corresponding position point according to the cold quantity requirement. Of course, the temperature thresholds To corresponding To the temperature sensors with different distances To the cold storage tube 3 may also be different, and when the coolant 11 at the position of each temperature sensor reaches the corresponding temperature threshold To, it represents a cold storage gear.

Or, the temperature threshold To corresponding To the temperature sensor far away from the cold storage tube 3 is higher than the temperature threshold To corresponding To the temperature sensor near To the cold storage tube 3, and is set according To the cooling rule of the coolant 11.

Preferably, after a period of cold accumulation, the temperature Ta of the cold accumulation agent 11 is respectively obtained by at least two of at least two temperature sensors having different distances to the cold accumulation tube 3 in the radial direction of the cold accumulation tube 3; judging whether the temperature Ta obtained by each temperature sensor reaches a temperature threshold To corresponding To the temperature sensor, if so, stopping cold accumulation; if not, the temperature Ta is periodically obtained through at least two temperature sensors. The temperatures obtained by at least two temperature sensors with different distances To the cold accumulation pipe 3 reach respective temperature threshold values To, and the phenomenon of excessive cold accumulation or insufficient cold accumulation caused by abnormal work of a certain temperature sensor can be avoided by simultaneously judging through a plurality of temperature sensors.

Preferably, each temperature sensor may have a plurality of temperature thresholds To as in the fifth embodiment, and when the temperature detected by one temperature sensor reaches one temperature threshold To corresponding To the temperature detected by another temperature sensor, the temperature detected by another temperature sensor also reaches one temperature threshold To corresponding To the temperature detected by another temperature sensor, that is, when the cold storage reaches a preset cold demand for a period of time, the temperatures obtained by at least two temperature sensors just reach the corresponding temperature thresholds To; multiple judgment can be carried out in multiple gears, and errors are avoided. For example, when the temperature acquired by the temperature sensor at point a reaches one of its temperature thresholds To, the temperature acquired by the temperature sensor at point B also just reaches one of its temperature thresholds To.

The seventh embodiment, which judges whether or not to stop cold accumulation based on the temperature of the cold accumulating agent 11, differs from the fifth embodiment in that: the cold storage amount of the cold storage agent 11 is judged by at least two temperature sensors arranged at intervals along the extending direction of the cold storage tubes 3, which is suitable for the condition that the cold storage device 5 is provided or not.

As shown in fig. 13 and 14, the temperature measuring assembly includes at least two temperature sensors, and the at least two temperature sensors are respectively disposed around different sections of the regenerator tube 3 that are spaced along the extending direction of the regenerator tube 3; and the distance between two adjacent temperature sensors is not less than the first distance threshold.

The set value of the first distance threshold is determined by the speed of cold accumulation of the coolant 11 at the positions of two adjacent temperature sensors, and the states and/or temperatures of the coolant 11 at the two positions are obviously different. The temperature of the coolant 11 at the position of the temperature sensor close to the inlet 31 in the length direction of the cold storage tube 3 is lower than that of the coolant 11 at the position of the other temperature sensor by a first temperature difference threshold value which is not less than 5 ℃; or when the coolant 11 at the position of the temperature sensor close to the inlet 31 in the length direction of the coolant storage tube 3 enters the crystallization process, the temperature of the coolant 11 at the position of the other temperature sensor is higher than the freezing point temperature of the coolant 11 by a second temperature difference threshold value, wherein the second temperature difference threshold value is not less than 1 ℃, and preferably not less than 3 ℃; or, when the temperature of the coolant 11 at the position of the temperature sensor close to the inlet 31 along the length direction of the cold storage tube 3 is lower than the freezing point of the coolant 11, the temperature of the coolant 11 at the position of the other temperature sensor is the freezing point temperature of the coolant 11.

The cold accumulation device 5 comprehensively considers the influence of the temperature change of the cold-carrying medium flowing through the cold accumulation pipe 3 on the cold accumulation agent 11 to obtain cold, so that the cold accumulation gear of the cold accumulation assembly 100 is diversified, and a proper temperature sensor is selected for measuring the temperature according to the required cold quantity to accurately control the cold accumulation process; set up two at least temperature sensor simultaneously, when a temperature sensor has the error, can in time only decrease through other sensor auxiliary judgement.

Specifically, the first distance threshold is not less than 30%, preferably not less than 50%, of the length of the regenerator tube 3 inserted into the coolant 11; preferably, the first distance threshold is not less than 150cm.

The cold storage tubes 3 are arranged in a zigzag shape, a snake shape or a spiral shape, temperature sensors are arranged on the periphery, and cold storage tube 3 sections which are not provided with the temperature sensors on the periphery are arranged between the cold storage tube 3 sections, so that a certain distance is reserved between the two temperature sensors when seen from the space position, the temperature and/or state difference of the cold storage agent 11 is large, and the cold storage tube can represent two gears with different cold demands.

Since the cooling medium flows from the inlet 31 to the outlet 32, the rate of cooling energy acquisition by the coolant 11 near the inlet 31 is the slowest, and therefore, when the temperature of the coolant 11 near the outlet 32 decreases to a target value, the temperature of the coolant 11 at other positions also decreases to the target value. Therefore, the distance between one temperature sensor and the outlet 32 in the extending direction of the cold storage tube 3 is not more than the second distance threshold value, and whether the maximum cold demand of the cold storage agent 11 is reached can be judged. Preferably the second pitch threshold is no greater than 150cm, preferably no greater than 100cm, preferably no greater than 50cm, preferably no greater than 20cm.

The at least two temperature sensors have the same or different distances from the cold accumulation pipe 3 along the radial direction of the cold accumulation pipe 3, and can be used for judging the cold accumulation state. The cold storage tubes 3 are arranged in a zigzag shape, a snake shape or a spiral shape, and the distance between the temperature sensor and the cold storage tube 3 is not more than half of the distance between two adjacent cold storage tube 3 sections in the radial direction of the cold storage tube 3, preferably between 0.2 and 0.4 of the distance between two adjacent cold storage tube 3 sections.

In the embodiment with the cold storage device 5, the difference from the above-described embodiment is: the temperature sensor is provided around the cold storage device 5. The temperature measuring component comprises at least two temperature sensors which are respectively arranged around different cold accumulation devices 5.

Specifically, along the extending direction of the cold storage tube 3, two cold storage devices 5 around which a temperature sensor is arranged are arranged at intervals, and the interval distance is not less than a third interval threshold value, preferably, the third interval threshold value is not less than 50% of the length of the cold storage tube 3 penetrating into the cold storage agent 11, or the third interval threshold value is not less than 150cm; or, at least one cold storage device 5 without temperature sensor around is arranged between the two cold storage devices 5 with temperature sensors around along the extension direction of the cold storage tubes 3. The interval between two adjacent temperature sensors is large, and the temperature of the coolant 11 at different positions can be acquired.

The distances from the at least two temperature sensors to the cold storage device 5 closest thereto are the same or different. The fifth embodiment is referred to for the positional relationship between the temperature sensor and the cold storage device 5 closest thereto, and the description thereof is omitted.

Preferably, one of the temperature sensors is located around the cold storage device 5 closest to the outlet 32.

The cold-storage method comprises the steps of, the method comprises the following steps: supplying cold to the cold storage agent 11 through the cold storage tubes 3 penetrating the cold storage agent 11, and acquiring the temperature Ta of the cold storage agent 11 through any one of temperature sensors around at least two cold storage tube 3 sections arranged at intervals along the extension direction of the cold storage tubes 3; or the cold storage device 5 and the cold storage agent 11 soaking the cold storage device 5 are supplied with cold through the cold storage pipe 3 penetrating through the cold storage device 5, and any one of the temperature sensors around at least two cold storage devices 5 arranged at intervals along the extension direction of the cold storage pipe 3 obtains the temperature Ta of the cold storage agent 11; judging whether the temperature Ta reaches a temperature threshold value To corresponding To the temperature sensor, if so, stopping cold accumulation; if not, the temperature Ta is periodically acquired.

The temperature threshold values To corresponding To the temperature sensors located around at least two sections of the cold storage tube 3 are the same or different, and various gears representing different cold storage amounts can be combined through different temperature threshold values T0. Along the extending direction of the cold accumulation pipe 3, the temperature threshold To corresponding To the temperature sensor with the short distance To the outlet 32 is higher than the temperature threshold To corresponding To the temperature sensor with the long distance To the outlet 32, which accords with the temperature distribution rule of the cold accumulation agent 11 in the cold accumulation box 1, and the two temperature sensors can be calibrated with each other.

Preferably, the temperature Ta of the coolant 11 is acquired by at least two of the temperature sensors around at least two sections of the regenerator 3 that are spaced apart in the direction of extension of the regenerator 3; judging whether the temperature Ta obtained by each temperature sensor reaches a temperature threshold To corresponding To the temperature sensor, if so, stopping cold accumulation; if not, the temperature Ta is periodically obtained through at least two temperature sensors. The temperatures obtained by at least two temperature sensors reach respective temperature threshold values To, and the phenomenon of excessive or insufficient cold accumulation caused by abnormal work of a certain temperature sensor can be avoided by simultaneously judging the temperature through a plurality of temperature sensors.

Each temperature sensor can have a plurality of temperature threshold values To, and when the temperature detected by one temperature sensor reaches one temperature threshold value To corresponding To the temperature sensor, the temperature detected by the other temperature sensor also reaches one temperature threshold value To corresponding To the temperature sensor, namely when the cold accumulation reaches a preset cold demand for a period of time, the temperature obtained by at least two temperature sensors just reaches the corresponding temperature threshold value To; multiple judgment can be carried out in multiple gears, and errors are avoided.

The utility model discloses unit delivery box 400 of preferred embodiment, including box 40 and the door body (not shown), be equipped with the lock on the door body (not shown). The box body 40 and the door body are both made of heat insulation materials such as vacuum heat insulation plates or foaming heat insulation plates, and sealing structures such as sealing strips are arranged at the joint of the box body and the door body.

The box body 40 is internally provided with a storage chamber 41, a cold accumulation component 100 a cooling module 42 and an electronic control unit 7. The electronic control unit 7 is in communication connection with other elements to control the working state of the electronic control unit.

The cold accumulation assembly 100 is any one of the above, and preferably further comprises a first joint 33 and a second joint 34 which are respectively connected to the inlet 31 and the outlet 32 of the cold accumulation tube 3; and is convenient to be butted with the cold filling machine 200. For example, the first connector 33 is in quick butt joint with the liquid outlet connector 2311; the second joint 34 is in quick butt joint with the liquid return joint 2321.

The coolant 11 is also generally selected according to the set temperature of the unit distribution box 400, and the freezing point of the coolant 11 is not higher than the temperature required by the unit distribution box 400. For example, when the unit dispensing box 400 is a refrigerator requiring a temperature of about 8 ℃, all of the coolant 11, such as water, having a freezing point of not higher than 0 ℃ may be used. When the unit distribution box 400 is a freezing box and the temperature is required to be-18 ℃, unfrozen liquid with the freezing point not higher than-25 ℃ can be used as the coolant 11.

The cold supply assembly 42 is used for transferring the energy accumulated by the cold accumulation assembly 100 to the storage chamber 41, and keeping the products in the storage chamber fresh. Specifically, the cooling module 42 includes a cooling pipe 421 communicating with the cold storage box 1, and a cooling pump 422 driving the coolant 11 to circulate in the cold storage box 1 and the cooling pipe 421, and a part of the cooling pipe is located in the storage chamber.

Compare in the scheme of traditional air circulation flow for the cooling of storing room 41, the utility model discloses a supply cold pump 422 drive liquid cold-storage agent 11 circulation flow to supply cold for storing room 41, the cold volume that liquid cold-storage agent 11 carried is bigger than the air, supply cold pump 422 stall back, the cold-storage agent 11 that is arranged in the cooling tube 421 of storing room 41 still can keep the low temperature of longer time to last to supply cold for storing room 41, consequently only need work very short time at the cooling pump 422, just can make storing room 41 maintain in the temperature of settlement for a long time. For example, in a period of 0.5 to 3 hours, the cooling pump 422 only needs to operate for 1 to 3 minutes, the generated heat is less, the electric quantity needed by the cooling pump 422 is less, the cooling pump can be maintained only by a common storage battery, the capacity of the storage battery is greatly reduced, and the charging time is shorter.

Preferably, a part of the cold supply pipe 421 is located at the top of the storage chamber 41, and the coolant 11 is guided from the cold storage tank 1 to the top of the storage chamber 41, so as to conform to the sinking principle of cold air, and when the number of products to be refrigerated/frozen is small, the top of the storage chamber 41 is idle, thereby avoiding the products from being frozen locally.

Specifically, the storage chamber 41 is defined by a top wall, a side wall and a bottom wall, and a part of the cold supply pipe is positioned on the top half part of the top wall and/or the side wall.

In a preferred embodiment, a thermal insulation plate 43 is disposed between the cold storage assembly 100 and the storage compartment 41, and specifically, the unit dispensing box 400 further includes a cold storage compartment for accommodating the cold storage assembly 100, and the storage compartment 41 and the cold storage compartment are disposed independently and separated from each other by the thermal insulation plate 43. On one hand, the goods loading, the goods precooling and the cold accumulation component cold accumulation of the storage chamber 41 can be carried out simultaneously, so that the time is saved, and the cold accumulation component 100 can not leak cold due to the opening of the storage chamber 41 because the two chambers are independent; on the other hand, during the cold accumulation process, the cold accumulation assembly 100 has little influence on the temperature in the storage chamber 41, and does not freeze the goods; in the cooling process, the temperature controllability in the storage chamber 41 is high, and the temperature fluctuation is small.

The utility model discloses in, the cold-storage room is located the below of storing room 41, the cold-storage subassembly is located in the cold-storage room, the focus of unit delivery case 400 leans on down, and the handling in-process is especially when empty, and difficult emergence is emptyd to can be in through fork truck unit delivery case 400's an arbitrary side is operated.

The cold supply pipe 421 passes through the thermal insulation plate 43 and extends into the storage chamber 41. Specifically, the cooling tube 421 includes a first cooling tube 423 extending upward from the cooling box 1, a heat dissipation tube 424 communicated with the first cooling tube 423, and a second cooling tube 425 communicated with the heat dissipation tube 424 and extending downward to the cooling box 1, wherein the heat dissipation tube 424 is located at the top of the storage chamber 41. Specifically, the heat dissipation tubes 424 are uniformly distributed on the top wall as much as possible, for example, in a serpentine shape, a corrugated shape or a mosquito coil shape, or the heat dissipation tubes 424 include a liquid distribution tube, a liquid collection tube, and a plurality of communication tubes connected between the liquid distribution tube and the liquid collection tube, wherein the liquid distribution tube and the liquid collection tube are located at the same side of the plurality of communication tubes or are located at both sides of the plurality of communication tubes; and/or the radiating pipe 424 is disposed at the upper half of the sidewall, for example, in the upper third region or the upper quarter region of the sidewall.

The first cold supply pipe 423 and the second cold supply pipe 425 are located at the lateral edge of the heat preservation box body 40 or on the side wall of the heat preservation box body 40, do not occupy the storage space of the storage chamber 41, and are convenient for stacking goods. In a specific embodiment, the box body 40 includes four side surfaces, the door body is disposed on one of the side surfaces, the first cooling supply pipe 423 and the second cooling supply pipe 425 are located at one or two side edges of one side surface disposed opposite to the door body, or both the first cooling supply pipe 423 and the second cooling supply pipe 425 are located on one side surface disposed opposite to the door body.

Preferably, the cooling assembly further comprises a water receiving bar positioned below the top cooling supply pipe, so that condensed water can be prevented from dropping on goods. Further, a first end of the water receiving strip in the length direction is lower than a second end which is oppositely arranged; that is, the water receiving bar is disposed obliquely or in a stepped manner, and the condensed water flows to one side and falls down along the wall surface.

The cooling assembly also comprises water guide grooves arranged at the first ends of all the water-saving strips, and the water guide grooves are provided with discharge ports for discharging condensed water outwards; and all the condensed water of the water-saving strips is collected to the water chute and discharged outwards.

Or, the cooling assembly further includes a water receiving tray located at the top of the storage chamber 41, the water receiving tray includes a water receiving portion located below the cooling pipe for receiving condensed water and a connecting portion connecting adjacent water receiving portions, and preferably, the connecting portion is provided with a hole for downward cold transfer.

Preferably, the first end of the water receiving part in the length direction is lower than the second end which is arranged oppositely. That is, the water receiving tray is obliquely arranged or arranged in a stepped manner, and the condensed water flows to one side and falls along the wall surface.

The cold supply assembly further comprises water guide grooves arranged at the first ends of all the water receiving parts, and the water guide grooves are provided with discharge ports for discharging condensed water outwards; all the condensed water of the water receiving part is collected to the water chute and discharged outwards.

Further, the cooling assembly further includes an indoor temperature sensor (not shown) for detecting a temperature in the storage compartment 41, and the indoor temperature sensor is located in the storage compartment 41. The indoor temperature sensor and the cold supply pump 422 are in communication connection with the electronic control unit 7. The working state of the cooling pump 422 is controlled according to the temperature in the storage chamber 41, and the cooling capacity is provided to the storage chamber 41 to maintain the temperature in a small range.

Preferably, the unit dispensing box further includes a fan at the radiating pipe 424 that may be activated to enhance air circulation during shutdown, if necessary.

In addition, the cold storage module 100, the refrigerant 200 and the unit distribution box 400 each further include a rechargeable battery module 9 for supplying power to the electric components. Or, the elements needing electricity are all elements with batteries.

Preferably, the cold machine 200 fills the outside of the box of unit distribution box 400 and all is equipped with one and accepts chamber 401, supply the motor part of cold pump 422, electronic control unit 7 with battery pack 9 set up in accept in the chamber 401, be convenient for fill, control and maintenance, and the direct outward diffusion of heat that produces when these parts work, can not consume the cold volume that the energy storage component accumulated.

In addition, the charging assembly 9 in the charger 200 includes a power input terminal and a power output terminal for supplying power to the individual power requiring units. The power input end is connected with 220V or 380V commercial power, the power output end provides direct current for the component or unit distribution box 400 of the cold charger 200, and the output voltage comprises but is not limited to 12V,24V,36V,48V and 72V.

Further, the electronic control unit further includes a signal connection terminal for transmitting a signal with the unit distribution box 400. For example, when the electric control unit is charged with cold, the unit distribution box transmits cold charging information to the electric control unit through the signal connection end, and flows into a cold charging progress signal, a cold charging end signal and the like.

Further, the sensors and the like referred to herein may also be included as part of the electronic control unit.

The utility model also provides a cold chain system, including any one of the aforesaid fill cold machine 200 and unit delivery case 400, the size of unit delivery case 400 is according to the in service behavior and can the exclusive use or a plurality of unit delivery case 400 use simultaneously.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A unit dispensing box comprising:

a storage chamber;

the cold accumulation assembly comprises a cold accumulation box and a cold accumulation agent positioned in the cold accumulation box;

characterized in that, the unit delivery box further comprises:

the cold supply assembly comprises a cold supply pipe communicated with the cold storage box and a cold supply pump for driving the cold storage agent to circularly flow in the cold storage box and the cold supply pipe; part of the cold supply pipe is positioned at the top of the storage chamber;

and the electric control unit is in communication connection with the cooling pump.

2. The unit dispensing box of claim 1 wherein the storage compartment is defined by a top wall, side walls and a bottom wall, and a portion of the cold feed tube is located in an upper half of the top wall and/or the side walls.

3. The unit dispensing box of claim 1 or 2 wherein the cooling assembly further comprises a water bar located below the top cooling duct;

or the cold supply assembly further comprises a water receiving tray positioned at the top of the storage chamber, and the water receiving tray comprises water receiving parts positioned below the cold supply pipes and connecting parts for connecting the adjacent water receiving parts;

or, the cooling assembly further comprises a water receiving tray positioned at the top of the storage chamber, the water receiving tray comprises water receiving parts positioned below the cooling pipes and connecting parts for connecting the adjacent water receiving parts, and holes are formed in the connecting parts.

4. A unit dispensing box as recited in claim 3, wherein a first end of the length of the drip strip is lower than an oppositely disposed second end; or the first end of the water receiving part in the length direction is lower than the second end which is arranged oppositely.

5. A unit dispensing box as claimed in claim 4,

the cold supply assembly also comprises a water guide groove which is positioned at the first end of the water receiving bar and is communicated with all the water receiving bars, and the water guide groove is provided with a discharge port for discharging condensed water outwards; or the cold supply assembly further comprises a water guide groove which is positioned at the first end of the water receiving part and is communicated with all the water receiving parts, and the water guide groove is provided with a discharge port for discharging condensed water outwards.

6. The unit dispensing box of claim 1 wherein a thermal barrier is provided between the cold accumulation assembly and the storage compartment, the cold supply tube extending through the thermal barrier into the storage compartment.

7. The unit dispensing box of claim 6 wherein the cold storage assembly is located below the storage chamber, the cold supply pipe comprises a liquid outlet pipe extending upward from the cold storage box, a heat dissipation pipe communicating with the liquid outlet pipe, a liquid return pipe communicating with the heat dissipation pipe and extending downward to the cold storage box, the heat dissipation pipe is located at the top of the storage chamber.

8. The unit dispensing box of claim 7 wherein the storage compartment comprises a box body defining the storage compartment, a door opening or closing the storage compartment, and the liquid outlet pipe and the liquid return pipe are located at a side edge of the box body or on a side wall of the box body.

9. The unit dispensing box of claim 7 wherein the storage compartment is defined by a top wall, side walls and a bottom wall, and the heat dissipating tubes are distributed in a serpentine pattern or uniformly on the top wall; and/or the radiating pipe is arranged on the upper half part of the side wall.

10. The unit dispensing box of claim 1 wherein the cooling assembly further comprises an indoor temperature sensor for sensing the temperature within the storage compartment, the indoor temperature sensor being in communication with the electronic control unit.

11. The unit dispensing box of claim 1 wherein the cold storage assembly further comprises a cold storage tube disposed through the coolant, and wherein an inlet and an outlet of the cold storage tube are exposed outside the cold storage box.

12. The unit dispensing box of claim 11 wherein the cold storage assembly further comprises a temperature measuring assembly including at least one temperature sensor spaced from the cold storage tubes in a radial direction of the cold storage tubes; or the temperature measuring assembly comprises at least two temperature sensors arranged around the cold storage tube, and the distances from the at least two temperature sensors to the cold storage tube along the radial direction of the cold storage tube are different; or, the temperature measurement assembly comprises at least two temperature sensors arranged around the cold storage tube, the at least two temperature sensors are distributed at intervals along the extension direction of the cold storage tube, and the distance between every two adjacent temperature sensors is not smaller than a first distance threshold value.

13. The unit dispensing box of claim 1 wherein the unit dispensing box includes a box body, the storage compartment and the cold storage assembly are located in the box body, an accommodating cavity is provided outside the box body, and a motor of the cold supply pump is located in the accommodating cavity.

14. The unit distribution box of claim 1, further comprising a battery assembly electrically connected to both the cooling assembly and the electronic control unit.

15. A cold chain system comprising a unit dispensing box according to any one of claims 1 to 14.