CN115265030A

CN115265030A - Cold storage method and cold storage equipment with same

Info

Publication number: CN115265030A
Application number: CN202110910478.8A
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: 2022-11-01

Abstract

The invention provides a cold accumulation method, a computer readable storage medium, a computer device and a cold accumulation device with the computer device, wherein the cold accumulation method comprises the following steps: the cold storage device is provided with a cold storage pipe penetrating through the cold storage agent for cold storage of the cold storage agent, or the cold storage device and the cold storage agent soaking the cold storage device are provided with the cold storage pipe penetrating through the cold storage device for cold storage; acquiring the amount n1 of a solid cold storage agent formed by crystallization; judging whether the amount n1 of the solid cold-storage agent reaches a crystallization amount threshold value n0, and if so, stopping cold storage; if not, the quantity n1 of the solid coolant is periodically acquired. The cold accumulation method of the invention judges whether to finish cold accumulation according to the amount n1 of the solid cold accumulation agent formed by crystallization from the angle of the cold accumulation agent, does not influence the flow of the cold accumulation agent, can ensure that the cold accumulation agent also accumulates a part of cold energy, and ensures the effective cold accumulation process.

Description

Cold storage method and cold storage equipment with same

Technical Field

The invention relates to the technical field of cold accumulation, in particular to a cold accumulation method, a computer readable storage medium, computer equipment and cold accumulation equipment with the computer readable storage medium.

Background

The cold accumulation technology is an energy storage technology, utilizes the night low-valley load electric power to refrigerate and stores cold energy in a cold accumulation device, and then releases the stored cold energy in the daytime peak power or other places which can not be connected with a power supply, thereby reducing the electric load during the peak time of a power grid and expanding the use scene of the cold energy.

Fresh agricultural product transportation occupies a larger and larger proportion in Logistics distribution, and the transportation process of the fresh agricultural product needs refrigeration or freezing, which is generally called Cold Chain Logistics (Cold Chain Logitics), generally refers to the system engineering that refrigerated and frozen food is always in a specified low-temperature environment in all links from production, storage, transportation and sale to consumption before the consumption, so as to ensure the quality of the food and reduce the loss of the food.

Some delivery boxes set up cold-storage device, give cold-storage device cold-storage through refrigerating unit, release cold in the middle of the transportation and realize cold-stored commodity circulation, need not to consume petrol in the transportation, alleviate the burden of car. The beginning and ending of cold accumulation are mostly controlled according to empirical values, and phenomena such as excessive cold accumulation and insufficient cold accumulation are easily caused.

In view of the above, it is desirable to provide an improved cold storage method, a computer readable storage medium, a computer device and a cold storage device having the same, so as to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a cold accumulation method, a computer readable storage medium, a computer device and a cold accumulation device with the computer device.

In order to solve one of the technical problems, the invention adopts the following technical scheme:

a cold storage method comprising the steps of: the cold storage device is provided with a cold storage pipe penetrating through the cold storage agent for cold storage of the cold storage agent, or the cold storage device and the cold storage agent soaking the cold storage device are provided with the cold storage pipe penetrating through the cold storage device for cold storage; acquiring the amount n1 of a solid cold-storage agent formed by crystallization; judging whether the amount n1 of the solid cold-storage agent reaches a crystallization amount threshold value n0, and if so, stopping cold storage; if not, periodically acquiring the quantity n1 of the solid coolant.

Furthermore, a cold accumulation material is sealed in the cold accumulation device, and the cold accumulation method further comprises the following steps: acquiring the temperature T of the cold accumulation material; judging whether the temperature T is higher than the freezing point temperature T0 of the cold accumulation material, if so, starting cold accumulation; if not, the temperature T of the cold accumulation material is periodically acquired.

Furthermore, a cold storage material is sealed in the cold storage device, and the freezing point of the cold storage agent is not lower than that of the cold storage agent.

A computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the above-described cold storage method.

A computer device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the computer program, the cold storage method is realized.

A cold accumulation device adopts the cold accumulation method to accumulate cold.

The invention has the beneficial effects that: the cold accumulation method of the invention judges whether to finish cold accumulation according to the quantity n1 of the solid cold accumulation agent formed by crystallization from the perspective of the cold accumulation agent, does not influence the flow of the cold accumulation agent, and can ensure that the cold accumulation agent also accumulates enough cold quantity.

Drawings

FIG. 1 is a schematic view of a cold storage assembly in accordance with a preferred embodiment of the invention;

FIG. 2 is a schematic view of a cold storage assembly in accordance with another preferred embodiment of the invention;

FIG. 3 is a schematic view of a cold storage assembly in accordance with another preferred embodiment of the 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 in accordance with another embodiment of the present invention from the perspective of FIG. 6;

FIG. 9 is a schematic view of a cold thermal storage assembly in accordance with another preferred embodiment of the invention;

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

FIG. 11 is a schematic view showing the 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 the positional relationship between a temperature sensor and a cold storage device in 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 invention;

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

fig. 15 is a schematic view of a charger in accordance with 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 in accordance with a preferred embodiment of the present invention;

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

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

fig. 20 is a flow chart of a cold storage method in accordance with 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. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

In the various drawings of the present invention, some dimensions of structures or portions are exaggerated relative to other structures or portions for convenience 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 tank 1 having a thermal insulation function, a cold storage agent 11 located in the cold storage tank 1, and a cold storage tube 3 inserted into the cold storage agent 11, wherein an inlet 31 and an outlet 32 of the cold storage tube 3 are exposed outside the cold storage tank 1, specifically, the inlet 31 and the outlet 32 are disposed on the cold storage tank 1 or protrude out of the cold storage tank 1, so as to facilitate the connection 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 refrigeration unit 22, or may be a cold-carrying medium provided by another cold storage assembly 100 with 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 accumulation assembly 100 further comprises at least one cold accumulation device 5 soaked in the cold accumulation agent 11, the cold accumulation pipe 3 penetrates through the cold accumulation agent 11 but does not penetrate through the cold accumulation device 5, a cold accumulation material is sealed in the cold accumulation device 5, the cold accumulation material is different from the cold accumulation agent 11, and cold accumulation can be accumulated in both the cold accumulation material and the cold accumulation agent. 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-mentioned embodiment, the cold storage tubes 3 are inserted into the cold storage agent 11 and pass 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 cold storage material is preferably a phase change material, and can store or release a large amount of energy in the phase change 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 break due to the increase of the volume when the cold storage material is in phase change.

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 the flowing process. 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 to undergo phase change, and the liquid cold storage material is located above the solid cold storage material to avoid deformation or rupture of the cold storage device 5. More preferably, the cold storage tubes 3 are arranged from bottom to top in a spiral or serpentine shape, 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 directly contacted 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 between the end cover 512 and the inner tube 53 is sealed by welding and other manners, and 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. If the end cap 512 is removed, the rest constitutes a heat dissipation structure.

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 also 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 chamber 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 chambers 521 are communicated, when cold storage material is subjected to phase change and volume expansion after acquiring cold energy, for example, the cold storage material is changed from liquid state to solid state, the liquid cold storage material can flow in the adjacent sub cold storage chambers 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 being deformed or burst. 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, an arrangement density of the plurality of heat dissipation fins 542 decreases, and/or a 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, a central axis of the inner tube 53 deviates from a central axis of the outer tube 511 and is offset toward the first end, and a heat exchange speed between the cool storage material located at the first end and the inner tube 53 is faster than a 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 a plurality of cold-storage devices 5 penetrating through 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 positioned in the row at the bottom. The cold-carrying medium sequentially passes through the cold accumulation devices 5 from bottom to top and exchanges heat with the cold accumulation devices 5, the cold accumulation devices 5 positioned in the next row obtain cold energy before the cold accumulation devices 5 positioned in the previous row, and the cold accumulation devices 5 positioned in the lower row can provide cold energy for the cold accumulation devices 5 positioned above the cold accumulation devices in a heat radiation or contact heat transfer mode, so that the cold accumulation materials at the middle lower part of the cold accumulation devices 5 are enabled to generate phase change before the cold accumulation materials at the upper part, and the phenomenon that the cold accumulation devices 5 deform or break is avoided.

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

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 a 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 storage material is periodically acquired. The method can ensure that the cold storage material is completely in a liquid state before cold storage starts, so that the phase change can be carried out according to the 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 cold storage material in the cold storage device 5 under the use condition that the temperature requirement is not strict. The temperature T of the cold accumulation material can also be directly obtained through a 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 the cold energy 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 time is integrated, and when the time threshold t0 is reached, the cold accumulation is ended. Preferably, the time threshold t0 is between 1 hour and 3 hours, and the cold storage assembly 100 can store cold energy to maintain the temperature of the storage chamber 41 within the set temperature range for 6 hours to 100 hours when the cold storage assembly 100 is used on the unit distribution box 400 having the storage chamber 41.

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, and it is determined whether the temperature T is lower than the freezing point temperature T0 of the cold accumulation material, if yes, the cold accumulation is finished; if not, 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 agent 11 close to the cold storage tubes 3 gets cold before the cold storage agent 11 far from the cold storage tubes 3, and when the temperature of the cold storage agent 11 is lowered to its freezing point, a 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 regenerator tube 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 remaining liquid coolant 11 is that the coolant 11 is partially crystallized, sufficient cold energy is accumulated, 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 cold; 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.

In the above method, the thickness d1 of the solid coolant 11 is obtained by a 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 cold accumulation starts 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, when the liquid level difference H1-H0 reaches the liquid level difference threshold value, the cold accumulation is stopped. 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 allowable maximum crystallization amount, and the cold accumulation is stopped.

When the multi-component compound cold storage agent 11 is selected, the cold storage agent is in an ice slurry state after being crystallized, and the solid cold storage agent 11 and the liquid cold storage agent 11 have no clear boundary line, so that the cold storage ending point is judged appropriately by judging the crystallization amount. 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 connected to the electronic control unit 7 in a communication manner; 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 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, thereby determining the cold amount accumulated in the cold storage assembly 100 to accurately 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 adjacent regenerator tube 3 sections in the radial direction of 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 an extending direction of the regenerator 3 is not greater than a threshold distance value, preferably not greater than 20cm. Since the temperature of the coolant is higher as the coolant flows from the inlet 31 to the outlet 32 and is closer to the outlet 32, the temperature of the coolant 11 at other positions is lower than the target value when the temperature of the coolant 11 at the position closer to the outlet 32 is lower than 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 cold storage agent 11 is stored cold through the cold storage tubes 3 penetrating the cold storage agent 11, and the temperature Ta of the cold storage agent 11 is obtained through temperature sensors arranged at intervals along the radial direction with the cold storage tubes 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 in 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, 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 is accumulated through a phase change process.

The sixth embodiment, which judges whether or not to stop cold storage based on the temperature of the cold storage agent 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 more than a first distance threshold value; the influence of different sequences and speeds of cold energy acquisition of the cold storage agent 11 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 distance difference between the at least two temperature sensors and the cold accumulation tube 3 along the radial direction of the cold accumulation tube 3 can be equal difference series or non-equal difference series, and the adaptability adjustment can be carried out 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 thermal 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 provided at intervals in the radial direction of the regenerator tube 3. Specifically, the temperature sensors are provided at a plurality of points a, B, C, etc. having different distances from the center of the regenerator 3. 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 which respectively use the axes of the three adjacent cold storage devices 5 as the center of a circle and use 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, the central point D of the central area. When the coolant 11 at the point D is crystallized, 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 at a plurality of points a ', B ', C ' in the figure. 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 seen 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 distributed at different positions a ", B", C "and the like in the axial direction as shown in fig. 12, and these several 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 tube 3.

Based on 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 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 cooled 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 value To corresponding To the temperature sensor, if so, stopping cold accumulation; if not, the temperature Ta is periodically acquired.

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, the crystallization state of the cold accumulation agent 11 and the temperature after crystallization are judged according to the temperature, and the cold quantity accumulated by the cold accumulation assembly 100 is judged so as to accurately control the cold accumulation process; 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 positions having different distances from the regenerator 3 is different. For example, when the point a is closer To the regenerator tube 3 than the point B, and the temperatures of the point a and the point B reach the same temperature threshold To, the coldness accumulated by the coolant 11 is the first coldness and the second coldness, 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 cold storage agent 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 regenerator 3 is higher than the temperature threshold To corresponding To the temperature sensor near To the regenerator 3, and is set according To the cooling rule of the regenerator 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 tubes 3 along the radial direction of the cold accumulation tubes 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 from 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, as in the fifth embodiment, each temperature sensor may have a plurality of temperature thresholds To, 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 accumulation period reaches a preset cold demand amount, 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 to stop cold accumulation based on the temperature of the cold accumulation 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 apart 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 near 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 acquisition of the cold accumulation agent 11, 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 demand, so that the cold accumulation process is accurately controlled; set up two at least temperature sensor simultaneously, when a temperature sensor has the error, can in time end the loss 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 tubes 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, and cold storage tube 3 sections which are not provided with temperature sensors are arranged between the cold storage tube 3 sections which are provided with the temperature sensors around, 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 tubes 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 of the temperature sensors and the outlet 32 in the extending direction of the regenerator 3 is not greater than the second distance threshold, and it can be determined whether the maximum cooling demand of the regenerator 11 is reached. 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, the distance between the temperature sensor and the cold storage tube 3 is not more than one half of the distance between two adjacent cold storage tube 3 sections along the radial direction of the cold storage tube 3, and preferably, the distance between two adjacent cold storage tube 3 sections is 0.2-0.4.

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, two cold accumulation devices 5 around which the temperature sensor is arranged are arranged at intervals along the extending direction of the cold accumulation tubes 3, 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 accumulation tubes 3 penetrating through the cold accumulation 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 obtained.

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 as a positional relationship between the temperature sensor and the cold storage device 5 closest thereto, and details thereof are omitted.

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

The cold accumulation method comprises the following steps: the method comprises the steps that cold is supplied to a cold storage agent 11 through a cold storage tube 3 penetrating through the cold storage agent 11, and the temperature Ta of the cold storage agent 11 is obtained through any one of temperature sensors arranged around at least two cold storage tube 3 sections at intervals along the extension direction of the cold storage tube 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 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 To corresponding To the temperature sensor, if so, stopping cold accumulation; if not, the temperature Ta is periodically acquired.

The temperature thresholds 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 thresholds T0. Along the extending direction of the cold accumulation tube 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 tubes 3 arranged at intervals in the extension direction of the regenerator tubes 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 cold accumulation assembly 100 and the cold accumulation method are suitable for cold accumulation equipment with the cold accumulation assembly 100, wherein the cold accumulation equipment can be a cold filling machine 200 or a unit distribution box 400.

In one embodiment, as shown in fig. 1-16, the cold storage device is a cold charger 200 for cooling the unit dispensing box 400. The cold filling machine 200 comprises a box body 21, a refrigerating unit 22, any one of the cold accumulation assemblies 100, a cold filling assembly 23 and an electric control unit 7, wherein the box body 21 is used for accommodating and protecting other components.

Any of the above is adopted for the cold storage assembly 100. The coolant 11 is a heat transfer medium for transferring the stored cold to the unit distribution box 400. Preferably, in the embodiment with the cold storage device 5, the freezing point of the cold storage agent 11 is not higher than the freezing point of the cold storage material, and when the phase of the cold storage material changes into a solid state, all or a part of the cold storage agent 11 is still in a liquid state, so as to facilitate the cold charging of the unit distribution box 400.

In addition, the temperature of the cold accumulation material is set to be T2, the temperature of the cold accumulation agent is set to be T3, the temperature of the unit distribution box 400 is set to be T4, and in order to ensure quick and effective cold transmission, the temperature T3-T2 is more than or equal to 10 ℃, preferably between 10 ℃ and 20 ℃, and more preferably between 15 ℃ and 20 ℃; T4-T3 is not less than 3 ℃, preferably between 3 ℃ and 15 ℃, more preferably between 5 ℃ and 15 ℃.

The refrigerating unit 22 comprises a compressor, a condenser, a throttling element and an evaporating pipe which are connected to form a refrigerating loop, wherein the evaporating pipe is arranged in the cold storage liquid in a penetrating mode or supplies cold energy to the cold storage liquid through a heat transfer medium.

When the electricity is off at night, the refrigerating unit 22 works and transmits cold energy to the cold accumulation component 100, and the cold accumulation component 100 accumulates a large amount of cold energy; in daytime, the cold accumulation assembly 100 provides cold energy to the unit distribution box 400 through the cold charging assembly 23, which is equivalent to peak shifting and valley shifting electricity utilization, and reduces the electricity cost of cold charging. In addition, the power of the refrigerating unit 22 is limited, the maximum cooling capacity that can be provided is also limited, and the plurality of unit distribution boxes 400 cannot be charged at the same time; the cold storage assembly 100 accumulates a large amount of cold to charge the plurality of unit distribution boxes 400 when needed, beyond the total output of the refrigeration unit 22. Or, in order to charge the plurality of unit distribution boxes 400 with cold at the same time, the power of the refrigeration unit 22 needs to be increased or a plurality of refrigeration units 22 need to be arranged, which is high in cost; the invention reduces the power or quantity of the refrigerating unit 22 through the cold accumulation assembly 100, and reduces the cost.

The cold charging assembly 23 comprises a liquid outlet pipe 231 communicated with the cold storage box 1, a liquid return pipe 232 communicated with the cold storage box 1 and a cold charging pump 233. For the convenience of docking with the unit distribution box 400, the cooling assembly 23 further includes a liquid outlet connector 2311 connected to the liquid outlet pipe 231, and a liquid return connector 2321 connected to the liquid return pipe 232.

The liquid outlet pipe 231 is used for outputting the coolant 11 in the coolant storage box 1 to the unit distribution box 400, and the liquid return pipe 232 is used for returning the coolant 11 in the unit distribution box 400 to the coolant storage box 1. In the invention, the liquid outlet pipe 231 is connected to the bottom of the cold storage box 1, and the connection position of the liquid return pipe 232 and the cold storage box 1 is not lower than the connection position of the liquid outlet pipe 231 and the cold storage box 1, preferably not lower than the top of the cold storage device 5, so that the returned cold storage agent 11, the cold storage agent 11 and the cold storage device 5 perform sufficient heat exchange, and the output cold storage agent 11 is ensured to have lower temperature. Preferably, the connection between the liquid return pipe 232 and the cold storage box 1 and the connection between the liquid outlet pipe 231 and the cold storage box 1 are arranged diagonally in space, so as to prolong the flow path of the coolant 11 in the cold storage box 1.

The cold charge pump 233 drives the cold storage agent 11 to circulate in the cold storage tank 1 and the unit distribution box 400, and transmits the cold stored in the cold storage device 5 to the unit distribution box 400. Specifically, the cold charge pump 233 is connected to the liquid outlet pipe 231 and the connection with the cold storage tank 1, or connected to the liquid outlet pipe 231, and actively drives the coolant 11 to flow to the unit distribution tank 400. Or, the cold charge pump 233 is connected to the connection between the liquid return pipe 232 and the cold storage box 1, or connected to the liquid return pipe 232, and is adapted to drive the flow of the cold storage agent 11 in a closed circulation loop.

Further, the cold charging assembly 23 further includes a ball valve 234, and when the liquid outlet pipe 231, the liquid return pipe 232 and the cold charging pump 233 have a problem, the cold storage device is closed through the ball valve 234 for maintenance.

In another embodiment, as shown in fig. 1 to 14 and 17 to 19, the cold storage device is a unit distribution box 400, and the unit distribution box 400 includes a storage compartment 41, a cold storage component 100, a cold supply component 42 and an electronic control unit 7. Preferably, the cold storage assembly 100 is located below the storage chamber 41, and a thermal insulation plate 43 is provided between the cold storage assembly 100 and the storage chamber 41.

The cold accumulation assembly 100 is any one of the above, and preferably further includes a first joint 33 and a second joint 34 connected to the inlet 31 and the outlet 32 of the cold accumulation tube 3, respectively; and is convenient to be butted with the cold charging 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.

In addition, the coolant 11 is also generally selected according to the set temperature of the unit dispensing box 400, and the freezing point of the coolant 11 is not higher than the temperature required by the unit dispensing 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.

Compared with the conventional scheme that air circularly flows to cool the storage chamber 41, the invention drives the liquid coolant 11 to circularly flow to cool the storage chamber 41 through the cooling pump 422, the cooling capacity carried by the liquid coolant 11 is larger than that of air, and after the cooling pump 422 stops operating, the coolant 11 in the cooling tube 421 in the storage chamber 41 can still keep a low temperature for a long time and continuously supply cooling to the storage chamber 41, so that the storage chamber 41 can be kept at the set temperature for a long time only by working the cooling pump 422 for a short 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, the partial cold supply pipe 421 is located at the top of the storage chamber 41, and the cold storage agent 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 left unused, thereby avoiding the products from being frozen locally.

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

In the present invention, the cooling pipe 421 passes through the thermal insulation plate 43 and extends into the storage chamber 41. Specifically, the cooling pipe 421 includes a first cooling pipe 423 extending upward from the cooling box 1, a heat dissipation pipe 424 communicating with the first cooling pipe 423, and a second cooling pipe 425 communicating with the heat dissipation pipe 424 and extending downward to the cooling box 1, wherein the heat dissipation pipe 424 is located at the top of the storage chamber 41. Specifically, the heat dissipation tube 424 is 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 tube 424 includes 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 both located at the same side of the plurality of communication tubes or are respectively located at both sides of the plurality of communication tubes; and/or, the heat pipe 424 is disposed on the upper half of the sidewall, for example, in the upper third area or the upper quarter area 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.

Preferably, the cooling assembly further comprises a water receiving bar positioned below the cooling pipe at the top; it is possible to prevent the condensed water from dropping on the 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 strips are obliquely arranged or arranged in a stepped manner, and the condensed water flows to one side and falls 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 the condensed water of all the water-saving strips is collected to the water guide groove 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 inside the storage compartment 41, and the indoor temperature sensor is located inside the storage compartment 41. The indoor temperature sensor and the cold supply pump 422 are in communication connection with the electronic control unit 7. According to the temperature in the storage chamber 41, the working state of the cold supply pump 422 is controlled, and heat or cold is supplied to the storage chamber 41 to maintain the temperature in a small range.

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 self-contained batteries.

Preferably, the outside of the box body of the cold charging machine 200 and the unit distribution box 400 is provided with an accommodating cavity 401, the motor part of the cold supply pump 422, the electric control unit 7 and the battery assembly 9 are arranged in the accommodating cavity 401, so that the cold charging, the control and the maintenance are convenient, the heat generated by the components during working is directly diffused outwards, and the cold accumulated by the energy storage assembly is not consumed.

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 invention also provides a cold chain system, which comprises any one of the filling machine 200 and the unit distribution box 400.

It should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be appreciated by those skilled in the art that the specification as a whole may be appropriately combined to form other embodiments as will be apparent to those skilled in the art.

The above-listed detailed description is merely a detailed description of possible embodiments of the present invention, and it is not intended to limit the scope of the invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. A cold storage method is characterized by comprising the following steps:

the cold storage device is provided with a cold storage pipe penetrating through the cold storage agent for cold storage of the cold storage agent, or the cold storage device and the cold storage agent soaking the cold storage device are provided with the cold storage pipe penetrating through the cold storage device for cold storage;

acquiring the amount n1 of a solid cold storage agent formed by crystallization;

judging whether the amount n1 of the solid cold-storage agent reaches a crystallization amount threshold value n0, and if so, stopping cold storage; if not, the quantity n1 of the solid coolant is periodically acquired.

2. Cold storage method according to claim 1, characterized by further comprising the steps of:

acquiring the volume V0 of the cold storage agent before cold storage starts;

acquiring the volume V1 of a cold storage agent in the cold storage process in real time;

and calculating the quantity n1 of the solid cold-storage agent according to the volume difference V1-V0.

3. The cold storage method according to claim 1, characterized in that the liquid level H0 before cold storage and the liquid level H1 during cold storage are obtained by a liquid level meter communicated with a cold storage tank storing a cold storage agent; and calculating the volume difference V1-V0 through the liquid level difference H1-H0.

4. The cold storage method according to claim 1, characterized in that the liquid level H0 before cold storage and the liquid level H1 during cold storage are obtained by a liquid level meter communicated with a cold storage tank storing a cold storage agent; when the liquid level difference H1-H0 reaches the liquid level difference threshold value, stopping cold accumulation;

or before the cold accumulation is started, filling the cold accumulation agent into the cold accumulation box until the cold accumulation agent reaches a first preset liquid level; and in the cold accumulation process, acquiring the liquid level H1 of the cold accumulation agent, and stopping cold accumulation when the liquid level H1 reaches a second preset liquid level.

5. A cold storage method according to claim 1, wherein the cold storage agent is a multi-component compounded cold storage agent or a single-component cold storage agent.

6. A cold storage method according to claim 1, wherein a cold storage material is sealed in the cold storage device, said cold storage method further comprising the steps of:

acquiring the temperature T of the cold accumulation material;

judging whether the temperature T is higher than the freezing point temperature T0 of the cold accumulation material, if so, starting cold accumulation; if not, the temperature T of the cold accumulation material is periodically acquired.

7. A cold storage method according to claim 1, wherein a cold storage material is sealed in the cold storage device, and the freezing point of said cold storage agent is not lower than the freezing point of said cold storage agent.

8. A computer-readable storage medium on which a computer program is stored, the computer program realizing the cold storage method according to any one of claims 1 to 7 when executed by a processor.

9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a cold storage method as claimed in any one of claims 1 to 7 when executing the computer program.

10. A cold storage apparatus, characterized by comprising: cold accumulation is carried out by using the cold accumulation method as claimed in any one of claims 1 to 7.