CN113154767A

CN113154767A - Fixed cold station system and implementation method

Info

Publication number: CN113154767A
Application number: CN202110172425.0A
Authority: CN
Inventors: 田文胜; 崔明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-07-23

Abstract

The invention discloses a fixed cold station system and an implementation method in the technical field of refrigeration, wherein the fixed cold station system comprises a control system, a refrigeration system, a cold storage and a cold storage, wherein the refrigeration system, the cold storage and the cold storage are connected with the control system; the implementation method comprises a refrigeration step and a cold filling step. The cold energy of the cold station is stored by utilizing the phase-change material, so that the compressor of the cold station does not need to be in a working state for a long time, the power resource is fully saved, the service life of the equipment is ensured, and the capital cost is saved.

Description

Fixed cold station system and implementation method

Technical Field

The invention relates to the technical field of refrigeration, in particular to a fixed cold station system and an implementation method.

Background

The Cold Chain generally refers to Cold Chain Logistics (Cold Chain Logistics), and indicates that the refrigerated and frozen food is always in a specified low-temperature area environment in the whole processes of production, storage and transportation, so as to avoid deterioration of corresponding articles due to temperature problems. The application range of the cold chain is as follows: primary agricultural products such as vegetables, fruits, meat, poultry eggs, aquatic products and the like, primary processed foods such as quick-frozen foods, ice creams, dairy products and the like, and special products such as medicines.

At present, the cold chain is mainly used for conveying food, and the food cold chain is mainly used for guaranteeing the quality of perishable food and mainly adopts low-temperature storage and transportation, so that the cold chain has higher and more complex requirements and larger energy consumption than a logistics system of general normal-temperature articles, and the construction investment is also much larger, thereby being a huge system engineering.

The existing cold station comprises a refrigerating system consisting of a compressor, an evaporator and the like, and cold energy produced by the refrigerating system is directly sent to an emergency freezing area and a freezing area for freezing or refrigerating. Such cold station does not have cold storage system, and cold energy stability is not enough, need rely on the incessant start-up of automatic monitoring equipment day and night to refrigerate, has consumed a large amount of energy, has also consumed a large amount of capital costs simultaneously. In addition, when the cold station goes in and out of goods, the cold energy of the whole cold station is insufficient, and the risk of deterioration of goods is easy to occur.

The existing cold station structure adopts a fan to blow an evaporator to form air convection, so that air cooling type refrigeration is realized, the heat exchange efficiency is low, and the refrigeration efficiency and the energy consumption are low.

The above-mentioned drawbacks are worth solving.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a fixed cold station system and an implementation method.

The technical scheme of the invention is as follows:

a fixed cold station system comprises a control system, and a refrigerating system, a cold storage and a cold storage which are connected with the control system, wherein cold filling devices are respectively arranged between the refrigerating system and the cold storage, between the refrigerating system and equipment to be refrigerated, and between the cold storage and the equipment to be refrigerated,

the control system controls the operation of the refrigerating system, the cold storage and controls the liquid flow among the refrigerating system, the cold storage and the cold storage;

the refrigerating system is used for refrigerating in the valley of electricity utilization and circulating cold storage liquid to the cold storage and the cold storage warehouse;

the refrigerator is used for receiving the liquid conveyed by the refrigerating system, carrying out low-temperature heat preservation on articles in the refrigerator, and conveying the heated liquid back to the refrigerating system;

the cold storage house is connected with the equipment to be refrigerated and is filled with cold.

The refrigerator is characterized in that the refrigeration system, the cold storage and the cold storage are respectively provided with a corresponding temperature sensor and a corresponding liquid level sensor, and the temperature sensor and the liquid level sensor are connected with the control system.

The invention according to the scheme is characterized in that the cold filling device comprises an electric control valve body and a water pump, the electric control valve body and the water pump are both connected with the control system, and the cold filling device positioned between the refrigerating system and the equipment to be refrigerated and between the cold storage and the equipment to be refrigerated further comprises quick change connectors.

The invention according to the scheme is characterized in that a phase change storage area and a refrigeration area are arranged in the refrigeration system, circulating cooling liquid is arranged in the phase change storage area, refrigeration cooling liquid is arranged in the refrigeration area, and the circulating cooling liquid realizes circulation among the refrigeration system, the cold storage and the cold storage.

Further, the solid-liquid phase change temperature of the circulating cooling liquid is lower than that of the refrigerating cooling liquid.

Furthermore, a plurality of temperature areas are arranged in the refrigerator, heat-preservation cooling liquid is arranged in the temperature areas, and the circulating cooling liquid conveyed by the phase change storage area is arranged outside the heat-preservation cooling liquid.

The invention according to the above aspect is characterized in that the cold storage reservoir stores therein a cold storage coolant.

On the other hand, the realization method of the fixed cold station system is characterized by comprising a refrigeration step and a cold filling step,

in the refrigeration step, the control system controls the compressor to refrigerate the refrigeration system in the electricity utilization valley, so that the refrigeration cooling liquid in the refrigeration system is frozen, and the circulating cooling liquid is in a liquid state;

in the step of cold filling, the control system controls the circulating cooling liquid to be transported to a refrigerator and a cold storage warehouse, and the heat preservation cooling liquid in the middle temperature area of the refrigerator is used for preserving the heat of the circulating cooling liquid in the refrigerator.

The invention according to the above scheme is characterized in that in the step of refrigerating, the control system detects the liquid level and the temperature in the refrigerating system in real time or at regular time, and performs circulation of the circulating cooling liquid according to the internal liquid level and performs refrigerating according to the internal temperature.

The present invention according to the above aspect is characterized in that, in the step of cooling, the control system detects the liquid level and the temperature in the refrigerator and the cold storage in real time or at regular time, and performs the transportation of the circulating cooling liquid according to the liquid level/temperature in the refrigerator or the cold storage.

According to the scheme, the cold energy of the cold station is stored by utilizing the phase-change material, so that a compressor of the cold station does not need to be in a working state for a long time, the power resource is fully saved, the service life of equipment is ensured, and the capital cost is saved; meanwhile, a liquid heat exchange mode is adopted, so that the refrigeration efficiency of the compressor is improved, and the electric quantity of a refrigeration unit is reduced. According to the invention, the cold storage is used for storing the articles in the cold station at low temperature, so that the articles are prevented from going bad, and meanwhile, the cold energy of other parts of the cold station is not influenced by charging and discharging the cold energy of the cold storage only when the articles are loaded and unloaded from the cold station, so that the articles in the cold station are prevented from going bad; and meanwhile, external transportation equipment is rapidly cooled, so that a perfect cold chain system is formed, and the transportation cost of the cold chain is reduced.

Drawings

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic view of the present invention for rapidly cooling an external transport device.

In the figure, 10 — the refrigeration system; 11-a phase change storage region; 111-circulating a cooling liquid; 12-a refrigeration zone; 121-refrigeration cooling liquid; 13-a compressor; 131-a condenser; 132-an evaporator;

20-a refrigerator; 21-a first temperature zone; 22-a second temperature zone; 23-a third temperature zone;

30-a cold storage; 31-cold storage coolant;

41-an electric control valve body; 42-a water pump; 43-quick change coupler;

50-a refrigerator car; 51-cold box.

Detailed Description

The invention is further described with reference to the following figures and embodiments:

as shown in fig. 1 and 2, a fixed cold station system includes a control system, and a refrigeration system 10, a refrigerator 20, and a cold storage 30 connected to the control system, wherein cold charging devices are respectively disposed between the refrigeration system and the refrigerator, between the refrigeration system and the cold storage, between the refrigeration system and a device to be refrigerated, and between the cold storage and the device to be refrigerated. The control system controls the operation of the refrigeration system 10, the cold storage 20 and the cold storage 30, the cold storage 20 is used for providing a refrigeration environment for goods in the cold station, the cold storage 30 is used for cold charging for external equipment to be refrigerated, and in addition, the control system controls the operation of the cold charging device to further control the exchange of cold energy among all parts.

The refrigeration system 10 provides refrigeration, cold energy is provided for the cold storage 20 and the cold storage 30, centralized refrigeration is adopted, centralized control of the system is guaranteed, the working efficiency is improved, and the overflow loss of cold quantity in operation is reduced; through separating freezer 20 and cold storage 30, avoid influencing depositing of article in freezer 20 when filling cold to the refrigeration plant of treating of outside, freezer 20 and cold storage 30 overall arrangement compressor and refrigerating plant can reduce the energy consumption of cold station by a wide margin simultaneously.

The cold energy refers to energy converted by a phase change material through a phase change process by using the phase change material as a carrier. When the phase change material is transformed from a liquid state to a solid state, heat is released, which is understood to be the release of thermal energy; when transforming from a solid state to a liquid state, thermal energy is absorbed, understood as releasing cold energy. The invention stores cold energy by utilizing the physical phase change process of the phase change material and carries out quick cold charging by utilizing the cold charging device.

1. Refrigeration system

The refrigeration system 10 uses a compressor 13 (industrial refrigeration compressor) for refrigeration, the compressor is connected with a control system, and the control system controls the working state of the compressor. In addition, the refrigeration system works in the time period of the electricity consumption valley, performs refrigeration at night (electricity consumption valley), fully utilizes the principle of leveling industrial electricity consumption at peak valley, and can save the capital cost consumed by refrigeration.

In addition, in order to ensure the normal refrigeration or heat preservation function in the electricity consumption peak period and the electricity consumption level period, the refrigeration system 10 is internally provided with a phase change storage area 11 and a refrigeration area 12, the refrigeration area 12 is used for providing a refrigeration environment, and the phase change storage area 11 is used for storing refrigeration capacity. Specifically, the refrigeration area 12 is internally provided with refrigeration cooling liquid 121, the phase change storage area 11 is internally provided with circulating cooling liquid 111, and the circulating cooling liquid 111 realizes circulation among the refrigeration system 10, the refrigerator 20 and the refrigeration storage 30, that is, circulation of cooling capacity among the refrigeration system 10, the refrigerator 20 and the refrigeration storage 30 can be realized through circulation of the circulating cooling liquid 111.

In order to ensure the refrigeration of the refrigeration area 12 and the cold storage of the phase change storage area 11, the invention adopts the liquid phase change principle to carry out heat preservation. The solid-liquid phase-change temperature of circulating coolant 111 is lower than the solid-liquid phase-change temperature of refrigerant coolant 121, and the operation control temperature of refrigerant system 10 is between the solid-liquid phase-change temperature of circulating coolant 111 and the solid-liquid phase-change temperature of refrigerant coolant 121. Since the refrigerating cooling liquid 121 has a high solid-liquid phase-change temperature and the circulating cooling liquid 111 has a relatively low solid-liquid phase-change temperature, when the refrigeration system 10 operates at the control temperature, the refrigerating cooling liquid 121 is in an icing state (i.e., a solid state), and the circulating cooling liquid 111 is in a liquid state, and the refrigerating cooling liquid 121 is used for preserving cold energy of the circulating cooling liquid 111.

Air has a very low specific heat capacity (cp =1.003 kJ/(kg x K) 250K), and compared with water, air has no heat storage capacity and very low heat transfer capacity, so that air is not suitable for high-power heat transportation and exchange. The invention utilizes the principle that the solid-liquid phase change of the refrigeration cooling liquid 121 absorbs heat to refrigerate and preserve heat of the circulating cooling liquid 111, and can fully increase the heat preservation time. The following description will be made by taking temperature changes of ice and water as examples: the specific heat capacity of water is 4.2KJ/(KG. ℃), the specific heat capacity of ice is 2.1KJ/(KG. ℃) and the heat of dissolution of ice is 335KJ/kg, the heat of fusion of ice is far greater than the specific heat capacity of water and ice, and energy storage refrigeration can be carried out by using smaller volume weight. It can be calculated that about 80 kg of water is lowered by 1 c to melt 1 kg of ice, which means that the low temperature region of the article can be maintained for a long time with a small amount of ice.

The invention utilizes the principle, fully utilizes the dissolution and heat absorption of the cooling liquid to freeze the articles, and particularly utilizes the phase change of the refrigerating liquid at a set low temperature to ensure that a cold station is in a low temperature state for a long time, for example, the refrigerating liquid in an icing state at minus 30 ℃ can be adopted to maintain the articles at the temperature near minus 30 ℃ for a long time. By utilizing the principle and the heat loss reduced by liquid conveying cold energy and the great conveying efficiency, the cold storage effect of the cold station is eighty times of the effect of the traditional cold chain cold station. In addition, the invention adopts liquid refrigeration rather than air cooling for refrigeration, and adopts the full contact heat exchange between the liquid phase-change material and the evaporator, thereby greatly improving the heat exchange efficiency, reducing the electricity consumption cost and simultaneously reducing the energy dissipation.

Preferably, the phase-change storage area 11 surrounds the periphery of the refrigeration area 12, so that the refrigeration cooling liquid 121 in the refrigeration area 12 can achieve the refrigeration and heat preservation effects on the phase-change cooling liquid 111 in the phase-change storage area 11.

Preferably, the compressor is connected with a power supply management unit, and the power supply management unit is connected with a power supply; the refrigeration line of the compressor extends into the interior of the refrigeration zone of the refrigeration system 10 and is connected to the evaporator 132 for the exchange of cold energy; the compressor is also connected to the condenser 131 through a heat discharge line, and the condenser 131 is provided with an exhaust fan for discharging internal heat. In the specific implementation process, the refrigeration system performs refrigeration through the compressor, and the evaporator absorbs heat in the phase-change material, so that the liquid-solid phase change of the phase-change material is realized and cold storage is realized.

In one embodiment, the refrigeration cooling liquid is a cooling liquid with a solid-liquid phase change temperature of-40 ℃, the external circulating cooling liquid can be a cooling liquid with a solid-liquid phase change temperature of-50 ℃, and the compressor controls the refrigeration system to work at-45 ℃, so that the refrigeration cooling liquid is changed from a liquid state to a solid state, and the circulating cooling liquid is still in a liquid state. The size of the refrigeration system and the type of each cooling liquid required by the cooling station systems of different sizes are different and can be selected according to specific requirements.

2. Refrigerator with a door

The refrigerator 20 is used to store articles stored in a cold station, and to store and refrigerate physical products (such as fresh food, vegetables, and medicines). The refrigerator 20 can receive the liquid (i.e. the circulating cooling liquid 111) delivered by the refrigeration system and utilize the liquid to realize low-temperature preservation of the goods; and after the temperature of the liquid is raised, the liquid is circulated back to the refrigerating system for repeated refrigeration. The absence of a separate refrigeration unit within the refrigerator 20 substantially reduces the energy consumption of the cold station.

The refrigerator 10 is provided with a temperature zone for storing articles, which is similar to the heat preservation function of a refrigeration system, and the refrigerator adopts the phase change principle of cooling liquid for heat preservation. Specifically, heat preservation cooling liquid is arranged in the temperature zone, circulating cooling liquid conveyed by the phase change storage area is arranged outside the heat preservation cooling liquid, the solid-liquid phase change temperature of the heat preservation cooling liquid is higher than the solid-liquid phase change temperature of the circulating cooling liquid, the heat preservation cooling liquid is refrigerated through circulation of the circulating cooling liquid, and the temperature zone is cooled and preserved through the heat preservation cooling liquid.

In a specific implementation process, circulating cooling liquid in a low-temperature state enters a temperature zone in a refrigerator to refrigerate heat-preservation cooling liquid in the temperature zone, and the temperature of the circulating cooling liquid is lower than the solid-liquid phase change temperature of the heat-preservation cooling liquid, so that the heat-preservation cooling liquid is refrigerated to be in a solid state, and the temperature of the circulating cooling liquid is raised to be slightly higher. In the subsequent working process, the circulation process of the circulating cooling liquid is stopped, and then the heat preservation of the temperature area is realized by the heat preservation cooling liquid, so that the refrigerating temperature in the temperature area is ensured.

In order to store articles with different temperature requirements, a plurality of temperature zones are provided in the refrigerator 20, and the different temperature zones are controlled to be at different refrigerating temperatures. The solid-liquid phase change temperatures of the heat preservation cooling liquid in different temperature zones are different, and different refrigeration temperatures of different temperatures are realized by adopting the heat preservation cooling liquid with different solid-liquid phase change temperatures. The different temperature zones of the refrigerator 20 store cold simultaneously during the off-peak period of electricity consumption, and when the cold is insufficient during the day (for example, new goods are loaded), the circulating cooling liquid 111 in the refrigerating system is input through the control system.

In one embodiment, a first temperature zone 21, a second temperature zone 22, and a third temperature zone 23 are disposed in the refrigerator 20, a first heat-preserving cooling liquid is disposed in the first temperature zone 21, a second heat-preserving cooling liquid is disposed in the second temperature zone 22, and a third heat-preserving cooling liquid is disposed in the third temperature zone 23, and the solid-liquid phase change temperature of the first heat-preserving cooling liquid, the solid-liquid phase change temperature of the second heat-preserving cooling liquid, and the solid-liquid phase change temperature of the third heat-preserving cooling liquid are all different.

For example, the first heat-preserving cooling liquid is cooling liquid with a solid-liquid phase change temperature of-40 ℃, and a refrigerating temperature of-35 ℃ is provided by the cooling liquid with the temperature of-40 ℃; the second heat-preservation cooling liquid is cooling liquid with the solid-liquid phase change temperature of-15 ℃, and the refrigeration temperature of-10 ℃ is provided by the cooling liquid with the temperature of-15 ℃; the third heat-preservation cooling liquid is cooling liquid with the fixed liquid phase-change temperature of 0 ℃, and the refrigeration temperature of 2-8 ℃ is provided through the cooling liquid with the temperature of 0 ℃.

3. Cold storage

The cold storage 30 is connected to an external device to be cooled for cooling the device to be cooled, and the device to be cooled may be a refrigerator car, a freezing barrel, or a refrigerator in an office area. Specifically, the cold storage 30 is connected to the phase change storage area 11 of the refrigeration system, and obtains and stores cold energy through circulation of liquid, so as to prepare for cold charging of the equipment to be refrigerated. Preferably, the cold storage 30 is connected with the equipment to be refrigerated through a quick-change connector, so as to realize quick transmission of the cooling liquid.

The refrigeration storage 30 of the invention is not provided with an independent refrigerating device, so that the energy consumption of a cold station can be fully reduced; in addition, the separation of the cold storage 30 from the cold storage 20 can avoid the influence on the cold storage effect of the goods in the cold station when the cold storage 30 is filled with cold.

In the invention, the cold storage cooling liquid 31 is stored in the cold storage 30, the solid-liquid phase change temperature of the cold storage cooling liquid 31 is higher than the solid-liquid phase change temperature of the circulating cooling liquid 111, and the cold storage cooling liquid 31 is refrigerated by the circulating cooling liquid 111. Preferably, the cold storage cooling liquid is a supercooled liquid, the circulating cooling liquid 111 refrigerates the cold storage cooling liquid 31 to a critical state, and in the subsequent use process, the supercooling principle and the quick change connector are utilized to charge cold for the equipment to be refrigerated.

The invention uses the cold storage as the 'intermediate device' to charge the cold for the external equipment to be refrigerated, and can charge a plurality of pieces of equipment to be refrigerated for a plurality of times. The cold storage warehouse is a large-scale cold storage warehouse, mainly refers to a cold storage warehouse which is built in each existing large logistics center and is used for freezing and refrigerating a large amount of vegetable and fruit foods.

4. Cold charging device

The cold charging device comprises an electric control valve body 41, a water pump 42 and a quick-change connector 43, and the electric control valve body 41, the water pump 42 and the quick-change connector 43 are all connected with the control system. Specifically, the cooling devices located between the refrigeration system 10 and the refrigerator 20, between the refrigeration system 10 and the cold storage 30, and between the refrigeration system 10 and the equipment to be cooled are water pumps 42; the cold charging device between the refrigeration system 10 and the equipment to be refrigerated and between the cold storage 30 and the equipment to be refrigerated further comprises an electric control valve body 41 and a quick-change connector 43.

The control system controls the circulation of cooling liquid between the refrigeration system 10 and the equipment to be refrigerated and between the cold storage 30 and the equipment to be refrigerated by controlling the opening/closing of the electric control valve body 41 and the quick change connector 43, and the quick change connector 43 realizes the quick flow of the liquid; the flow of the cooling liquid between the refrigeration system 10 and the refrigerator, between the refrigeration system 10 and the cold storage 30, and between the refrigeration system 10 and the equipment to be refrigerated is realized by controlling the operation of the water pump 42.

5. Control system

The control system is used for monitoring the working condition of each component unit and controlling the normal operation of the whole cold station. Specifically, the control system is used for controlling the operation of the compressor 13 so as to enable the compressor to refrigerate when the cold power is insufficient, and controlling the refrigeration system 10 to work in the electricity utilization valley time period; the control system also controls a power system and a switch system, and controls the flowing state of the circulating cooling liquid 111 between the refrigerating system 10 and the cold storage 20 and the cold storage 30 through the control system and the switch system, so that the normal refrigerating and heat preservation effects of the refrigerating system 10, the cold storage 20 and the cold storage 30 are ensured through the flowing of the circulating cooling liquid 111.

In an embodiment, the refrigeration system 10, the refrigerator 20 and the cold storage 30 are respectively provided with corresponding temperature sensors (not shown, the same applies hereinafter), the temperature sensors are connected to the control system, and the control system senses temperatures of different positions in the refrigeration system 10, the refrigerator 20 and the cold storage 30 through the temperature sensors to realize a real-time monitoring function, so as to perform a flow of the circulating cooling liquid 111 when the temperature of the refrigeration system 10, the refrigerator 20 or the cold storage 30 is insufficient, thereby ensuring the refrigeration and cold storage effects of the refrigeration system 10, the refrigerator 20 and the cold storage 30.

In an embodiment, corresponding liquid level sensors (not shown, the same below) are respectively disposed in the refrigeration system 10, the refrigerator 20, and the cold storage 30, the liquid level sensors are connected to the control system, and the control system senses liquid levels of the cooling liquids at different positions in the refrigeration system 10, the refrigerator 20, and the cold storage 30 through the liquid level sensors to realize a real-time monitoring function, so that the circulating cooling liquid 111 flows when the circulating cooling liquid 111 in the refrigeration system 10, the refrigerator 20, or the cold storage 30 is insufficient, thereby ensuring the refrigeration and cold storage effects of the refrigeration system 10, the refrigerator 20, and the cold storage 30.

As shown in fig. 2 and 3, in the process of cooling the external equipment (such as a cold chain transport vehicle, i.e. a refrigerator car 50), the fixed cold station system of the present invention:

a. the fixed cold station system performs refrigeration preparation, the control system controls the compressor 13 to work, and then the refrigeration cooling liquid 121 charges and cools the circulating cooling liquid 111, so that the refrigeration cooling liquid 121 is below the freezing point temperature (namely in a solid state), meanwhile, the circulating cooling liquid 111 and the cold storage cooling liquid 31 are in a liquid state, and the temperature is controlled to be near the freezing point;

b. the refrigerator car 50 enters the designated cold-charging position of the fixed cold station and is connected with the quick-change connector 43, two liquids A, B are stored in the refrigerator car 50, the liquid A is placed in the container (namely the cold box 51), and the solution B is placed in the copper pipe inside the container;

c. the control system is started, the cold storage cooling liquid 31 in the cold storage 30 is driven to be filled into the container of the refrigerator car 50, the cooling liquid which is changed into room temperature in the refrigerator car 50 is replaced, meanwhile, the circulating cooling liquid 111 in the refrigerating system 10 is driven to enter the copper pipe in the container and continuously circulate, and the replaced liquid A is filled with cold;

d. and after the temperature sensor and the liquid level sensor detect that the liquid A in the container is changed into a solid, the cold charging process is finished, the quick-change connector is disassembled, and the refrigerated vehicle is driven out of the charging station.

The fixed cold station system is used for rapidly cooling the external equipment, so that the external equipment is prevented from continuously consuming diesel oil in the transportation process to cool, the raw material cost can be reduced, and the environmental pollution is reduced.

The invention also discloses an implementation method of the fixed cold station system, which specifically comprises the steps of refrigeration and cold filling: in the refrigeration step, the control system controls the compressor to refrigerate the refrigeration system in the electricity utilization valley, so that the refrigeration cooling liquid in the refrigeration system is frozen, and the circulating cooling liquid is in a liquid state; in the step of cold filling, the control system controls the circulating cooling liquid to be transported to the refrigerator and the cold storage, and the heat preservation cooling liquid in the middle temperature area of the refrigerator preserves the heat of the refrigerator.

The step of charging the cold of the present invention further comprises the step of charging the cold of the equipment to be refrigerated, such as a refrigerated vehicle. Specifically, the method comprises the following steps: connecting the equipment to be refrigerated and a fixed cold station system, and controlling the cold storage cooling liquid in the cold storage to replace the cooling liquid in the container of the equipment to be refrigerated by the control system; the control system controls the circulating cooling liquid in the refrigerating system to enter a copper pipe of an inner container of the equipment to be refrigerated and refrigerates the cooling liquid in the container; and after the refrigeration is finished, disconnecting the equipment to be refrigerated and the fixed cold station.

After the refrigeration or the cooling is finished, the implementation process of the fixed cold station system also comprises a heat preservation process. Specifically, along with the heat preservation of the articles in the refrigerator/the equipment to be refrigerated and the equipment, the heat dissipation of the surrounding environment and the like, the temperature in the system is gradually increased, the refrigeration cooling liquid is gradually dissolved at the moment, the temperature of the surrounding circulating cooling liquid is absorbed in the dissolving process, and the refrigeration and heat preservation effects of the circulating cooling liquid are further realized.

In order to ensure the working states of a refrigerating system, a cold storage and a cold storage, in the refrigerating step, a control system detects the liquid level and the temperature in the refrigerating system in real time or at regular time, and the circulating cooling liquid is circulated according to the liquid level of each part so as to ensure the balance of the cooling liquid state of each part; and refrigerating according to the internal temperature so as to ensure that the cold energy in the refrigerating system can supply the requirement of the whole cold station.

Similarly, in order to ensure the refrigeration and heat preservation effects in or after the cold filling process, the control system detects the liquid level and the temperature in the cold storage chamber and the cold storage chamber in real time or at regular time in the cold filling step, and carries out the conveying of the circulating cooling liquid according to the liquid level/temperature in the cold storage chamber or the cold storage chamber.

On one hand, the invention uses the solid-liquid phase change heat absorption principle of the phase-change material (cooling liquid), carries out cold-heat exchange and cold storage in a mode of absorbing a large amount of cold energy through liquid-solid conversion, freezes the articles in a mode of releasing the cold energy through solid-liquid conversion, and particularly utilizes the phase change of the cooling liquid at a set low temperature to ensure that a cold station is in a low-temperature state for a long time. Utilize cooling liquid phase change principle to refrigerate, heat retaining process compares in the refrigerated principle of traditional compressor and can make refrigeration, the heat preservation effect improves tens of times, utilizes the mode of liquid contact conduction to replace the air cooling mode simultaneously, can promote refrigerating system's refrigeration efficiency, utilizes liquid contact heat transfer far, the efficiency is higher than the characteristic of air convection heat transfer and carries out quick cold filling to the refrigerator car, improves workplace's operating efficiency, can reduce 30% power consumption under the equal environmental index of test.

On the other hand, the invention utilizes the characteristic of flat peak and valley of industrial power supply to refrigerate at the power consumption valley (night) so as to reduce the production cost, utilizes the difference of the power price in the day and the night to the maximum extent, stores cold energy for use in the day at night, reduces the power consumption cost of enterprises while balancing the power load of a power system, and can melt a cold station with cooling liquid with lower solid-liquid phase change temperature to freeze when the equipment to be refrigerated is refrigerated, and a large amount of cooling liquid is filled into the equipment to be refrigerated for quick refrigeration.

The invention only arranges the refrigerating device in the refrigerating system to realize the centralized refrigeration of the cold station. The invention not only makes refrigeration faster, improves working efficiency, reduces cold overflow loss in refrigeration; meanwhile, the investment of refrigeration equipment in the cold station is reduced, the effect of centralized refrigeration is realized, and the capital cost is reduced.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

The invention is described above with reference to the accompanying drawings, which are illustrative, and it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other fields without modification.

Claims

1. A fixed cold station system is characterized by comprising a control system, and a refrigerating system, a cold storage and a cold storage which are connected with the control system, wherein cold filling devices are arranged between the refrigerating system and the cold storage, between the refrigerating system and equipment to be refrigerated and between the cold storage and the equipment to be refrigerated,

the refrigerating system is used for refrigerating and circulating cold-stored liquid to the cold storage, the cold storage and the equipment to be refrigerated;

2. The stationary cold station system of claim 1, wherein the refrigeration system, the cold storage room and the cold storage room are respectively provided with a corresponding temperature sensor and a corresponding liquid level sensor, and the temperature sensor and the liquid level sensor are connected to the control system.

3. The stationary cold station system according to claim 1, wherein the cold charging means between the refrigeration system and the cold store, and between the refrigeration system and the equipment to be refrigerated are water pumps; the cold charging device positioned between the refrigerating system and the equipment to be refrigerated and between the cold storage house and the equipment to be refrigerated further comprises an electric control valve body and a quick-change connector;

the water pump, the electric control valve body and the quick-change connector are all connected with the control system.

4. The fixed cold station system of claim 1, wherein a phase change storage area and a refrigeration area are provided in the refrigeration system, wherein a circulating coolant is provided in the phase change storage area, wherein a refrigeration coolant is provided in the refrigeration area, and wherein the circulating coolant realizes circulation among the refrigeration system, the cold storage and the cold storage.

5. The stationary cold station system of claim 4, wherein the circulating coolant has a solid-to-liquid phase change temperature that is lower than a solid-to-liquid phase change temperature of the chilled coolant.

6. The stationary cold station system according to claim 4, wherein said refrigerator has a plurality of temperature zones, said temperature zones having a thermally insulating coolant therein, said phase change storage area delivering a circulating coolant disposed outside said thermally insulating coolant.

7. The stationary cold station system of claim 1, wherein said cold storage reservoir has stored therein a cold storage coolant.

8. The implementation method of the fixed cold station system is characterized by comprising a refrigeration step and a cold filling step,

9. The method of claim 8, wherein the control system detects the liquid level and temperature in the refrigeration system in real time or at regular time during the refrigeration step, and circulates the circulating cooling liquid according to the internal liquid level and cools according to the internal temperature.

10. The method of implementing a fixed cold station system according to claim 8, wherein in the step of charging cold, the control system detects the liquid level and temperature in the cold storage room and the cold storage room in real time or at regular time, and performs the delivery of the circulating cooling liquid according to the liquid level/temperature in the cold storage room or the cold storage room.