CN115265027A

CN115265027A - Cold storage method and cold storage equipment with same

Info

Publication number: CN115265027A
Application number: CN202110909127.5A
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 agent is subjected to cold storage through a cold storage pipe penetrating through the cold storage agent; obtaining the thickness d1 of the solid cold-storage agent crystallized on the surface of the cold-storage tube; judging whether the thickness d1 of the solid coolant reaches a thickness threshold value d0, and if so, stopping the cold storage; if not, the thickness d1 of the solid coolant is periodically acquired. The cold accumulation method provided by the invention judges whether the cold accumulation is finished or not according to the thickness 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 accumulates part of cold energy, and ensures an 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 enlarging the use scene of the cold energy.

Fresh agricultural product transportation accounts for a larger and larger proportion in Logistics distribution, and the transportation process of the fresh agricultural product needs refrigeration or freezing, so that the fresh agricultural product transportation is generally called Cold Chain Logistics (Cold Chain Logistics), and generally refers to a system project that refrigerated and frozen food is produced, stored, transported and sold in all links before consumption and is always in a specified low-temperature environment 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 the cold-storage device cold-storage through refrigerating unit, release cold in the transit and realize cold-stored commodity circulation, need not to consume petrol in the transportation, alleviate the burden of car. The start and end of cold accumulation are mostly controlled according to empirical values, and phenomena such as excessive cold accumulation, insufficient cold accumulation and the like 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 agent is subjected to cold storage through a cold storage pipe penetrating through the cold storage agent; obtaining the thickness d1 of the solid cold-storage agent crystallized on the surface of the cold-storage tube; judging whether the thickness d1 of the solid coolant reaches a thickness threshold value d0, and if so, stopping the cold storage; if not, the thickness d1 of the solid coolant is periodically acquired.

A cold storage method comprising the steps of: the cold accumulation device and the cold accumulation agent for soaking the cold accumulation device are subjected to cold accumulation through a cold accumulation pipe penetrating into the cold accumulation device; obtaining the thickness d1 of the solid cold-storage agent crystallized on the surface of the cold-storage device; judging whether the thickness d1 of the solid coolant reaches a thickness threshold value d0, if so, stopping cooling; if not, the thickness d1 of the solid coolant is periodically acquired.

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

The beneficial effects of the invention are: the cold accumulation method of the invention judges whether to finish cold accumulation according to the thickness of the solid cold accumulation agent crystallized and formed on the surface of the cold accumulation pipe or the cold accumulation device 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.

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 a positional relationship between a temperature sensor and a cold storage device in the embodiment of the present invention;

FIG. 12 is a schematic view showing the positional relationship between the temperature sensor and the 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 thermal 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 internal 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 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 drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes in accordance with the embodiments are within 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 heat preservation function, a cold storage agent 11 located in the cold storage tank 1, and a cold storage tube 3 penetrating through 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, and specifically, the inlet 31 and the outlet 32 are disposed on the cold storage tank 1 or protrude outside the cold storage tank 1 so as to be easily connected to 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 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 the cold accumulation material and the cold accumulation agent can accumulate 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-mentioned embodiment, the cold storage tubes 3 are inserted into the cold storage agent 11 and penetrate 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 housing has a cold storage chamber 52 therein, and the cold storage material is stored in the cold storage chamber 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 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 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 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 cool storage cavity 52 with cool storage material, and the filling port is sealed by a sealing member 5122 after the cool storage material is filled. After the end cover of the cold accumulation device 5 is removed, the rest part forms a heat conduction 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 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 1.5 mm-2 mm, 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, the heat conducting fins 54 include two heat transferring fins 541 extending toward the first end and the second end, respectively, and the two heat transferring fins 541 divide the cold storage cavity 52 into two sub cold storage cavities 521 symmetrically arranged. The cold accumulation device 5 further comprises a communication channel 55 for communicating at least two of the cold sub-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 a region with a large density or a long length, and the region with a large heat transfer area changes phase first and then after the region with a 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, the phase change speeds of the cold storage liquids in the two sub cold storage chambers 52 are the same from the first end to the second end, that is, the phase change speeds of the cold storage 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 thereto, and the arrows in fig. 6 show the sequence of energy obtaining 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 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 storage 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 storage material flows upwards, and the 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 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 the cold accumulation devices 5 in series from the bottom to the top, and the inlets 31 of the cold accumulation tubes 3 are connected to the inner tubes of the cold accumulation devices 5 which are positioned in the bottom row. 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 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 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 the 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 phase change occurs around the solid cold storage material, which easily causes 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 outer side of the cold storage device 5, and the temperature deviation Δ T of the outer side of the cold storage device 5 and the inner cold storage material is counted and corrected according to a large number of experiments, and the temperature T of the cold storage material = temperature T1+ temperature deviation Δ T. 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 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 2 ℃ to 5 ℃, 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 cold accumulation amount is based on the demand, and the method for judging the cold accumulation stopping includes but is not limited to:

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 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, 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 so, the cold accumulation is finished; if not, continuing to store cold; the second temperature threshold is 2-5 ℃, which can avoid the judgment error caused by the uneven temperature of the cold storage material, the measurement error and the like.

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 condition that the cold accumulation device 5 is provided or not.

In the embodiment without the cold storage device 5, the cold storage agent 11 close to the cold storage tubes 3 obtains cold before the cold storage agent 11 far from the cold storage tubes 3 during the cold storage process, 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 through the cold storage tube 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 accumulation 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 is 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 coolant 11 is affected by another adjacent regenerator 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 firstly transmitted to the cold storage device 5 and then transmitted to the cold storage agent 11 outside through the cold storage device 5, and the cold storage agent 11 is crystallized on the surface of the cold storage device 5.

The cold accumulation method comprises the following steps: cold is stored for the cold storage device 5 and the cold storage agent 11 soaking the cold storage device 5 through a cold storage pipe 3 penetrating in the cold storage 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 coolant 11 also partially accumulates cold, but a part of the coolant 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 the adjacent two cold storage devices 5, 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 storage method comprises the following steps: 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 penetrating the cold storage agent 11 to cool the cold storage agent 11 or through the cold storage pipe 3 penetrating 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 partially 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 unit needing cold. For example, the crystal amount of the coolant 11 is not more than 30 to 50% of the total amount thereof. Of course, the setting of the thickness threshold value d0 in the third embodiment may be referred to, and the crystal amount threshold value may be converted from the surface areas of the cold storage tube 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, when the liquid level difference H1-H0 reaches the liquid level difference threshold value, the cold accumulation is stopped. Or, before beginning to store cold, filling the cold storage agent 11 into the cold storage tank 1 until the cold storage agent reaches a first preset liquid level, namely filling the cold storage 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 a distance between the temperature sensor and the cold storage tube 3 is not greater than one half of a distance between two radially adjacent cold storage tube 3 sections along 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 greater 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 method comprises the steps that cold storage is carried out on 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 a temperature sensor arranged at a radial interval with the cold storage tube 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 levels, 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 spacing 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 tube 3 along the radial direction and the axial direction of the regenerator tube 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 in the radial direction of the regenerator 3. Specifically, the temperature sensors are provided at a plurality of points a, B, C, etc. having different distances from the center of the axis of the regenerator tube 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 cold storage device 5 is the same as the distance from point D to cold storage device 5 in fig. 10, and point a' is faster than point B 'than point C' in view of the 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 accumulation method comprises the following steps:

the method comprises the steps that cold is stored in 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 at least two temperature sensors with different distances from the cold storage tube 3 along the radial 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 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, 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, 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 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 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 the temperature by 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 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 in the extending direction of the cold storage tubes 3, and is suitable for the case of the presence or absence of the cold storage device 5.

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 in 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 speed at which the cooling medium flows from the inlet 31 to the outlet 32 and the cooling energy is obtained from the coolant 11 near the inlet 31 is the slowest, the temperature of the coolant 11 near the outlet 32 decreases to a target value, and 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 thermal storage device 5, the difference from the above 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 tubes 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 tubes 3 penetrating 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 sensors is arranged between the two cold storage devices 5 with temperature sensors arranged 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 thermal storage device 5 closest to the outlet 32.

The cold accumulation method comprises the following steps: supplying cold to a cold storage agent 11 through a cold storage tube 3 penetrating through 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 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 the 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 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 obtained by at least two of the temperature sensors around at least two sections of the regenerator tube 3 arranged at intervals along the extension direction of the regenerator 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 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 judgments in multiple gears can be realized, and errors are avoided.

The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described cold storage method.

The invention also provides computer equipment which 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 accumulation method is realized.

The cold accumulation assembly 100 and the cold accumulation method of the present invention are applicable to a cold accumulation device having the cold accumulation assembly 100, which may be the cold charger 200 or the 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 distribution 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 member 100. The coolant 11 is a heat transfer medium that transfers 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 is changed into a solid state, all or a part of the cold storage agent 11 is still in a liquid state, so as to facilitate 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 11 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 is T3-T2T10 ℃, preferably between 10 ℃ and 20 ℃, and more preferably between 15 ℃ and 20 ℃; T4-T3T3 ℃, preferably between 3 ℃ and 15 ℃, more preferably between 5 ℃ and 15 ℃.

The refrigerating unit 22 includes a compressor, a condenser, a throttling element, and an evaporating pipe connected to form a refrigerating circuit, and the evaporating pipe is inserted into the cold storage liquid or supplies cold 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 component 100 supplies cold to the unit distribution box 400 through the cold charging component 23, which is equivalent to shifting peak and valley power consumption, and reduces the power cost of cold charging. In addition, the power of the refrigeration 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 accumulation assembly 100 accumulates a large amount of cold to charge the plurality of unit distribution boxes 400 as needed beyond the total output power 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 cold 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 cold 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 regenerator 1 and the connection between the liquid outlet pipe 231 and the regenerator 1 are arranged diagonally in space, so as to extend the flow path of the coolant 11 in the regenerator 1.

The cold charge pump 233 drives the coolant 11 to circulate in the cold storage tank 1 and the unit distribution boxes 400, and transmits the cold stored in the cold storage device 5 to the unit distribution boxes 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 there is a problem in the liquid outlet pipe 231, the liquid return pipe 232, and the cold charging pump 233, 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 chamber 41, a cold storage assembly 100, a cold supply assembly 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 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 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 ℃, the coolant 11 can be a non-freezing liquid with the freezing point not higher than-25 ℃.

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 assembly 42 includes a cooling tube 421 communicating with the cooling box 1, and a cooling pump 422 driving the coolant 11 to circulate in the cooling box 1 and the cooling tube 421, and a part of the cooling tube is located in the storage chamber.

Compared with the traditional scheme that air circularly flows to cool the storage chamber 41, the liquid coolant 11 is driven by the cooling pump 422 to circularly flow to cool the storage chamber 41, 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 pipe 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, a part of the cold supply pipe 421 is located at the top of the storage compartment 41, and the coolant 11 is guided from the cold storage box 1 to the top of the storage compartment 41, which conforms to the principle of cold air sinking, and when there are few products to be refrigerated/frozen, the top of the storage compartment 41 is left unused, so as to avoid 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 located at the upper half part of the top wall and/or the side wall.

In the present invention, 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 cool storage box 1, a heat dissipation tube 424 communicating with the first cooling tube 423, and a second cooling tube 425 communicating with the heat dissipation tube 424 and extending downward to the cool storage 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 separately located at both sides of the plurality of communication tubes; and/or the heat pipe 424 is disposed at the upper half of the sidewall, for example, in the upper third or the upper quarter 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 top cooling supply pipe, so that condensed water can be prevented from dropping on goods. Further, the first end of the water receiving strip in the length direction is lower than the 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 cold supply 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 cold supply pipe for receiving condensed water, and a connecting portion connecting adjacent water receiving portions, and preferably, a hole is formed in the connecting portion to transmit cold downward.

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 and a power output for powering 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 unit distribution box is used for cold charging, the unit distribution box transmits cold charging information to the electronic control unit through the signal connection end, and cold charging progress and cold charging end signals and the like flow into the unit distribution box.

In addition, 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 cold filling machines 200 and the unit distribution box 400.

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-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

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

the cold storage agent is subjected to cold storage through a cold storage pipe penetrating through the cold storage agent;

obtaining the thickness d1 of the solid cold storage agent crystallized on the surface of the cold storage tube;

judging whether the thickness d1 of the solid coolant reaches a thickness threshold value d0, if so, stopping cooling; if not, the thickness d1 of the solid coolant is periodically acquired.

2. Cold storage method according to claim 1, characterized in that said thickness threshold is comprised between 1cm and 4cm;

or the cold storage tubes are arranged in a zigzag shape, a snake shape or a spiral shape, and the thickness threshold value d0 is not more than half of the distance between two adjacent cold storage tube sections in the radial direction of the cold storage tubes;

or the cold accumulation tubes are arranged in a zigzag shape, a snake shape or a spiral shape, and the thickness threshold value d0 is 0.2-0.4 of the distance between two adjacent cold accumulation tube sections.

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

the cold accumulation device and the cold accumulation agent for soaking the cold accumulation device are subjected to cold accumulation through a cold accumulation pipe penetrating into the cold accumulation device;

obtaining the thickness d1 of the solid cold-storage agent crystallized on the surface of the cold-storage device;

4. Cold storage method according to claim 3, characterized in that said thickness threshold value is 2cm;

or, the thickness threshold d0 is not more than half of the distance between two cold storage devices adjacent in the radial direction;

or the thickness threshold d0 is between 0.2 and 0.4 of the distance between two adjacent cold accumulation devices in the radial direction.

5. A cold storage method according to claim 3, wherein a cold storage material is sealed inside said cold storage device, said cold storage method further comprising the steps of:

before cold accumulation, acquiring the temperature T of a cold accumulation material in the cold accumulation device;

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 storage material in the cold storage device is periodically acquired.

6. A cold storage method according to claim 3, wherein a cold storage material is sealed in said cold storage device, and a freezing point of said cold storage material is not lower than a freezing point of said cold storage agent.

7. Cold storage method according to any of claims 1 to 4, characterized in that the thickness d1 of the solid cold storage agent is obtained by a thickness sensor located inside the cold storage tank.

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

10. A cold storage device characterized by performing cold storage by the cold storage method according to any one of claims 1 to 7.