CN217636354U - Cold storage fresh-keeping storehouse capable of maintaining temperature stability - Google Patents

Abstract

The utility model belongs to the technical field of the fresh-keeping technique of refrigeration facility equipment and agricultural product storage and specifically relates to a keep fresh storehouse of stable cold-storage of storehouse temperature is related to, including the freezer right and right the inside refrigerating plant who supplies defeated air conditioning of freezer, a serial communication port, refrigerating plant includes daily refrigerating system and quick refrigerating system, daily refrigerating system switch-on the freezer is right the freezer supplies defeated air conditioning of predetermineeing the temperature, quick refrigerating system switch-on the freezer is waited the inside temperature of freezer is less than when predetermineeing the temperature right again the freezer supplies to fail and is less than predetermineeing the air conditioning of temperature. The utility model relates to a keep fresh-keeping storehouse of cold-storage that storehouse temperature is stable can the effective control cold-storage temperature fluctuation in the fresh-keeping storehouse, help the inside low temperature of the fresh-keeping storehouse of cold-storage more invariable.

Description

Cold storage fresh-keeping storehouse capable of maintaining temperature stability

Technical Field

The utility model belongs to the technical field of refrigeration facility equipment and agricultural product storage fresh-keeping technique and specifically relates to a keep fresh storehouse of stable cold-storage of storehouse temperature is related to.

Background

China is the world with the largest production and consumption of fruits, vegetables, livestock, poultry, eggs, dairy products and aquatic products. As agricultural products in China have the characteristics of large yield, high water content, strong seasonality, easy decay, short shelf life and the like, and the production places of the agricultural products are usually far away from market markets of sales places and are limited by logistics aging, cost and the like, the decay and deterioration loss of the agricultural products in China during the storage and transportation period from the production of the agricultural products to the sale reaches 25-35 percent.

Because the temperature is a key factor influencing the growth of agricultural products and exogenous microorganisms, the most common storage, transportation and storage mode of fruits and vegetables in China is low-temperature storage. However, in the process of low-temperature storage, the rotting and damaging rate of the fruits and vegetables is up to 20 percent due to after-ripening and external factors. In addition, the livestock and poultry products are stored for a short time before sale in a fresh-keeping mode, and the two modes of chilled fresh (0-4 ℃) and chilled fresh (-2-0 ℃) are most commonly used. However, the temperature fluctuation of the storage is a big factor causing decay and damage in the process of keeping agricultural products fresh. Temperature fluctuation caused by the fact that agricultural products stored at low temperature are not monitored in place in a cold chain, a freezer compressor is frequently started and stopped, fruits and vegetables are frequently put in and out of a warehouse, a door is operated and the like is a plurality of reasons for instability of the temperature of the warehouse.

Therefore, some scholars have studied the effect of temperature fluctuations on the quality of stored produce. The research mainly focuses on two aspects of freezing and storing the aquatic products and the meat products, mainly starts from the aspects that the freezing and storing temperature fluctuation influences the quality of the aquatic products and the frozen meat products, the temperature fluctuation is applied to food chemistry and the like, and researches related technologies are used for controlling and reducing the temperature fluctuation in the freezing process and improving the freezing and storing fresh-keeping effect. However, the temperature fluctuation of the refrigerator commonly used for fruit and vegetable preservation is less researched, but in the existing research, the weight loss rate of the tender ginger, the content of active oxygen substances and the content of malondialdehyde are easily increased due to the temperature fluctuation of +/-1 ℃ generated by frequent entering and leaving of the refrigerator, so that the commodity characteristics of the tender ginger, such as the content of soluble solids, the color and the weight, are rapidly reduced. In the research on the preservation of cucumbers, the temperature fluctuation exceeding +/-1 ℃ causes the increase and accumulation of cucumber fruit membrane permeability and malondialdehyde, obviously causes the stability reduction of fruit protection enzyme activities (POD enzyme, CAT enzyme and SOD enzyme) and generates obvious cold damage phenomenon during storage. In the study of cherry-apricot tomatoes, temperature fluctuation of +/-1 ℃ causes the skin and epidermis of the cherry-apricot tomatoes to be damaged seriously, cell structures are rapidly decomposed, and the storage time is greatly shortened. Therefore, the research on the temperature fluctuation in the low-temperature fresh-keeping storage process of the agricultural products and the research and development of related control facilities and equipment have great practical value.

SUMMERY OF THE UTILITY MODEL

The utility model provides a keep the fresh-keeping storehouse of stable cold-storage of storehouse temperature, the temperature fluctuation in the fresh-keeping storehouse of ability effective control cold-storage helps the inside low temperature in the fresh-keeping storehouse of cold-storage more invariable.

The utility model provides a keep fresh-keeping storehouse of stable cold-storage of storehouse temperature, including the freezer and right the inside refrigerating plant who supplies defeated air conditioning of freezer, refrigerating plant includes daily refrigerating system and quick refrigerating system, daily refrigerating system switch-on the freezer is right the freezer supplies defeated air conditioning of predetermineeing the temperature, quick refrigerating system switch-on the freezer is treated the inside temperature of freezer is less than again right when predetermineeing the temperature the freezer supplies defeatedly to be less than predetermine the air conditioning of temperature.

According to the utility model provides a pair of keep fresh-keeping storehouse of stable cold-storage of storehouse temperature, still include computer control system, be used for monitoring the temperature monitoring device of the inside temperature of freezer, be used for the switch-on the normal close electric damper of quick refrigerating system and freezer, temperature monitoring device sets up in the freezer and with the mutual data connection of computer control system, the activity of normal close electric damper is controlled by computer control system.

According to the utility model provides a pair of maintain fresh-keeping storehouse of cold-storage of storehouse temperature stability, computer control system passes through temperature monitoring device monitors temperature in the freezer is less than rethread control during the preset temperature normally closed electric air door is opened so that air conditioning in the quick refrigerating system enters into extremely the freezer.

According to the utility model provides a pair of keep fresh-keeping storehouse of stable cold-storage of storehouse temperature, quick refrigerating system includes rapid cooling refrigerating unit and rapid cooling wind channel, the switch-on in rapid cooling wind channel rapid cooling refrigerating unit with the freezer, the closed set up of normal close air-operated damper in the air outlet in rapid cooling wind channel.

According to the utility model provides a pair of keep fresh-keeping storehouse of cold-storage that storehouse temperature is stable, the air outlet quantity in rapid cooling wind channel is a plurality of, and each air outlet is suitable for and is close the door of storehouse of freezer.

According to the utility model provides a pair of keep fresh-keeping storehouse of cold-storage that storehouse temperature is stable, each the air outlet court the back wall direction of freezer is along transverse arrangement.

According to the utility model provides a pair of keep fresh-keeping storehouse of stable cold-storage of storehouse temperature, temperature monitoring devices includes the first temperature probe of a plurality of, and each first temperature probe is near respectively each air outlet, computer control system is through each first temperature probe monitors the inside temperature of freezer is less than when predetermineeing the temperature again control normally closed electric air door is opened.

According to the utility model provides a pair of keep fresh-keeping storehouse of cold-storage of storehouse temperature stability still includes a plurality of second temperature probe, each second temperature probe respectively to be close to two corners in the left and right of freezer back wall, computer control system passes through second temperature probe monitors when the inside temperature subcooling of freezer is again controlled normally closed electric air door closes.

According to the utility model provides a pair of keep fresh-keeping storehouse of cold-storage of storehouse temperature stability, first temperature probe and second temperature probe are electronic flexible probe.

According to the utility model provides a pair of keep fresh-keeping storehouse of cold-storage that storehouse temperature is stable, daily refrigerating system includes daily refrigerating unit and daily exhaust passage, daily exhaust passage is in the internal distribution of freezer is in the back wall of freezer and roof central authorities and externally switch on daily refrigerating unit, daily refrigerating unit passes through daily exhaust passage is right the freezer supplies to fail the air conditioning of predetermineeing the temperature.

The utility model relates to a keep the fresh-keeping storehouse of cold-storage of storehouse temperature stability, divide into daily refrigerating system and quick refrigerating system to the refrigerating plant that supplies defeated air conditioning inside the freezer, because daily refrigerating system and quick refrigerating system are put through with the freezer respectively, consequently make the freezer receive the cooling of two refrigerating systems respectively, when refrigerating, predetermine the required temperature of cold-storage, and supply the air conditioning of predetermineeing the temperature to the freezer through daily refrigerating system, make the freezer inside reach predetermined low temperature, form the low temperature environment that is fit for fresh-keeping vegetables and fruits; when various factors (for example, the door of the cold storage is opened, vegetables and fruits frequently enter and exit the cold storage, the compressor is frequently started and stopped, and the like) occur, the temperature in the cold storage is lower than the preset temperature, the quick refrigerating system is right, the cold storage is supplied and conveyed to be lower than the cold air with the preset temperature, the cold air with lower temperature is enabled to quickly enter the cold storage, the temperature in the cold storage is timely maintained at the preset temperature, a constant low-temperature environment is kept, the temperature fluctuation in the cold storage and fresh keeping storage can be effectively controlled, and the low-temperature inside the cold storage and fresh keeping storage is facilitated to be more constant.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a top view of the internal structure of the present invention;

FIG. 2 is a top view of the internal structure of an embodiment of the present invention;

FIG. 3 is a top view of the internal structure of an embodiment of the present invention;

FIG. 4 is a top view of the internal structure of an embodiment of the present invention;

FIG. 5 is a top view of the internal structure of an embodiment of the present invention;

FIG. 6 is a top view of the internal structure of an embodiment of the present invention;

FIG. 7 is a top view of the internal structure of an embodiment of the present invention;

FIG. 8 is a top view of the internal structure of an embodiment of the present invention;

FIG. 9 is a top view of the internal structure of an embodiment of the present invention;

fig. 10 is a top view of the internal structure of an embodiment of the present invention;

figure 11 is a graph of experimental data for an embodiment of the present invention;

figure 12 is a graph of experimental data for an embodiment of the present invention;

figure 13 is a graph of experimental data for an embodiment of the present invention;

figure 14 is a graph of experimental data for an embodiment of the present invention;

figure 15 is a graph of experimental data for an embodiment of the present invention;

figure 16 is a graph of experimental data for an embodiment of the present invention;

figure 17 is a graph of experimental data for an embodiment of the present invention;

figure 18 is a graph of experimental data for an embodiment of the present invention;

fig. 19 is a graph of experimental data for an embodiment of the present invention.

1-a refrigeration house, 2-a normally closed electric air door, 3-a storage door, 4-a quick cooling area, 100-a daily refrigeration system, 110-a daily refrigeration unit, 120-a daily air outlet channel, 200-a quick refrigeration system, 210-a quick cooling refrigeration unit, 220-a quick cooling air channel, 230-an air outlet, 300-a computer control system, 400-a temperature monitoring device, 410-a first temperature probe and 420-a second temperature probe.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings in the present invention will be combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model discloses a keep fresh-keeping storehouse of stable cold-storage of storehouse temperature below combining fig. 1 description the utility model discloses a keep fresh storehouse of storehouse temperature, including freezer 1 and to the refrigerating plant of 1 inside defeated air conditioning that supplies of freezer, in this scheme, refrigerating plant includes daily refrigerating system 100 and quick refrigerating system 200, and daily refrigerating system 100 switch-on freezer 1 supplies to defeated the air conditioning of predetermineeing the temperature to freezer 1, and quick refrigerating system 200 switch-on freezer 1 supplies to fail when treating the inside temperature of freezer 1 to be less than predetermineeing the temperature again and is less than the air conditioning of predetermineeing the temperature to freezer 1.

In this embodiment, the preset temperature is-5 ℃, during the daily refrigeration, the daily refrigeration system 100 supplies the cold air with the temperature of-5 ℃ to the refrigeration house 1, while the cold storage temperature inside the rapid refrigeration system 200 is-20 ℃, and when the internal temperature of the refrigeration house 1 is lower than-5 ℃, the rapid refrigeration system 200 supplies the cold air with the temperature of-20 ℃ to the refrigeration house 1.

In the embodiment, the refrigerating devices for supplying and conveying cold air to and from the interior of the refrigeration house 1 are divided into the daily refrigerating system 100 and the rapid refrigerating system 200, and the daily refrigerating system 100 and the rapid refrigerating system 200 are respectively communicated with the refrigeration house 1, so that the refrigeration house 1 can be respectively subjected to cold supply of the two refrigerating systems, and the temperature required for refrigeration is preset (in the embodiment, the temperature is minus 5 ℃) during refrigeration, and the daily refrigerating system 100 supplies cold air with the preset temperature to the refrigeration house 1, so that the interior of the refrigeration house 1 reaches the preset low temperature, and a low-temperature environment suitable for preserving vegetables and fruits is formed; when various factors (such as opening of a door of the refrigeration house 1, frequent entering and exiting of vegetables and fruits, frequent starting and stopping of a compressor and the like) occur, the temperature in the refrigeration house 1 is lower than the preset temperature, the refrigeration house 1 is supplied and conveyed with cold air lower than the preset temperature through the rapid refrigerating system 200, and the cold air with lower temperature rapidly enters the refrigeration house 1, so that the temperature in the refrigeration house 1 is maintained at the preset temperature in time, a constant low-temperature environment is kept, the temperature fluctuation in the cold accumulation fresh-keeping storehouse can be effectively controlled, and the low-temperature in the cold accumulation fresh-keeping storehouse is more constant.

As a further specific supplement to this embodiment, as shown in fig. 2, the refrigerator further includes a computer control system 300, a temperature monitoring device 400, and a normally closed electric damper 2, where the temperature monitoring device 400 is used to monitor the internal temperature of the refrigerator 1, and the normally closed electric damper 2 is used to connect the rapid refrigeration system 200 with the refrigerator 1, that is, when the normally closed electric damper 2 is closed, the rapid refrigeration system 200 cannot be connected with the refrigerator 1, and when the normally closed electric damper 2 is opened, the rapid refrigeration system 200 can be connected with the refrigerator 1, and the temperature monitoring device 400 is disposed in the refrigerator 1 and is in data connection with the computer control system 300, so that after the temperature monitoring device 400 detects the internal temperature of the refrigerator 1, the temperature data can be transmitted to the computer control system 300 in real time, and meanwhile, since the activity of the normally closed electric damper 2 is controlled by the computer control system 300, that the control end of the computer control system 300 is electrically connected to the transmission motor of the normally closed electric damper 2, the computer control system 300 can control the normally closed electric damper 2 to be opened, therefore, during the operation, when the computer control system 300 monitors the temperature in the temperature monitoring device 1 is lower than the preset temperature, the temperature of the cold storage can be kept in the refrigerator 1, and the cold storage can be kept in time, and the cold storage can be kept in the cold storage system, so that the cold storage can be kept in the cold storage system, and the cold storage can be kept in the cold storage system, and the cold storage system 200 can be kept in the cold storage.

More specifically, as shown in fig. 3, the rapid cooling system 200 includes a rapid cooling refrigeration unit 210 and a rapid cooling air duct 220, the rapid cooling refrigeration unit 210 is responsible for generating low-temperature cold air at-20 ℃, the rapid cooling air duct 220 connects the rapid cooling refrigeration unit 210 and the refrigeration storage 1, and the normally closed electric damper 2 is disposed at the air outlet 230 of the rapid cooling air duct 220 in a closed manner. Therefore, the low-temperature cold air produced by the rapid cooling refrigeration unit 210 can enter the refrigeration house 1 through the rapid cooling air duct 220, and the normally closed electric damper 2 is installed at the air outlet 230 of the rapid cooling air duct 220, and the normally closed electric damper 2 is closed after the air outlet 230, so that the rapid cooling air duct 220 can be controlled to be opened and closed through the normally closed electric damper 2.

Further, as shown in fig. 4 to 5, the number of the air outlets 230 of the rapid cooling air duct 220 is several, and each air outlet 230 is adapted to be close to the door 3 of the freezer 1, that is, each air outlet 230 of the rapid cooling air duct 220 is close to the door 3, because the doors 3 are frequently opened and closed when vegetables and fruits enter and exit the freezer 1, the external high temperature may first affect the area close to the door 3 in the freezer 1, and the temperature of the area close to the door 3 in the freezer 1 is most obviously decreased, so that each air outlet 230 of the rapid cooling air duct 220 is close to the door 3, and low-temperature cool air at-20 ℃ can enter the area in time, thereby forming a rapid cooling area 4 in the area, blocking the external high temperature from affecting the internal temperature of the freezer 1, more effectively maintaining the internal temperature of the freezer 1 at the preset temperature, maintaining a constant low-temperature environment, and further reducing the temperature fluctuation in the freezer 1.

Further, as shown in fig. 6 to 7, the outlets 230 are arranged in the lateral direction toward the rear wall of the refrigerator 1. When the-20 ℃ low-temperature cold air generated by the rapid cooling refrigeration unit 210 needs to be supplemented into the refrigeration house 1 in time, the normally closed electric air doors 2 of the air outlets 230 are opened, and the air outlets 230 are transversely arranged towards the rear wall of the refrigeration house 1, so that the rapid cooling area 4 can be further expanded, the external high temperature can be more effectively prevented from influencing the internal temperature of the refrigeration house 1, and the temperature fluctuation in the refrigeration house 1 can be further reduced.

As a further specific supplement to this embodiment, as shown in fig. 8, the temperature monitoring device 400 includes a plurality of first temperature probes 410, each of the first temperature probes 410 is close to each of the air outlets 230, and the computer control system 300 controls the normally closed electric damper 2 to open when the internal temperature of the refrigeration storage 1 monitored by each of the first temperature probes 410 is lower than the preset temperature. This scheme can help letting computer control system 300 detect a plurality of regions in freezer 1 respectively through each first temperature probe 410, and when the temperature of a certain region is less than the preset temperature of-5 ℃, computer control system 300 can open the normally closed electric air door 2 on the air outlet 230 that is close to this region to the pertinence, makes the low temperature air conditioning of-20 ℃ can get into this region to the pertinence, in time maintains the temperature constancy in this region, makes the work of air conditioning supplementary more pertinent, and work efficiency is higher.

Still further, as shown in fig. 9, the refrigerator further includes a plurality of second temperature probes 420, each second temperature probe 420 is respectively close to the left and right corners of the rear wall of the refrigerator 1, the computer control system 300 controls the normally closed electric damper 2 to close when monitoring the internal temperature of the refrigerator 1 through the second temperature probes 420, that is, in the process of supplementing-20 ℃ low-temperature cold air to the refrigerator 1, the computer control system 300 simultaneously detects the left and right corner regions of the rear wall of the refrigerator 1 respectively, and when monitoring the temperature of the region through the second temperature probes 420, the computer control system 300 controls the normally closed electric damper 2 to close in time, so that-20 ℃ low-temperature cold air cannot enter the refrigerator 1 again, thereby preventing the internal temperature of the refrigerator 1 from continuously decreasing, and the scheme can prevent the temperature of the deepest region of the refrigerator 1 from being overcooled to cause cold damage and freezing damage to vegetables and fruits, so that the refrigerating effect of the refrigerator 1 is more fresh-keeping.

Still further, the first temperature probe 410 and the second temperature probe 420 are both electric telescopic probes. Therefore, in the actual working process, the first temperature probe 410 and the second temperature probe 420 can be extended according to the actual situation, so that the temperature detection range of the interior of the refrigeration house 1 is enlarged, the temperature monitoring of the refrigeration house 1 by the temperature monitoring device 400 is facilitated to be enhanced, and the use is more flexible and convenient.

Further, as shown in fig. 10, the daily refrigerating system 100 includes a daily refrigerating unit 110 and a daily air outlet duct 120, the daily air outlet duct 120 is distributed in the center of the rear wall and the top wall of the refrigeration storage 1 inside the refrigeration storage 1 and is externally connected to the daily refrigerating unit 110, and the daily refrigerating unit 110 supplies cold air at a preset temperature to the refrigeration storage 1 through the daily air outlet duct 120. Thereby allowing the interior of the refrigerator 1 to be continuously maintained at a low-temperature refrigeration environment of a preset temperature.

In the present embodiment, the outlets 230 are respectively disposed on both left and right side walls of the refrigerator 1 and arranged in the lateral direction toward the rear wall of the refrigerator 1.

It should be noted that, in this embodiment, the cold storage tank in the daily refrigeration unit 110 has a large volume and contains a glycol cold storage agent, so that cold air at a low temperature of-5 ℃ can be output to the refrigeration storage 1; the cold storage tank in the rapid cooling refrigeration unit 210 is small in size, and the cold storage agent of glycol and glycerol is contained, so that low-temperature cold air at the temperature of-20 ℃ can be output to the refrigeration house 1.

Synthesize each concrete scheme of above-mentioned this embodiment, in order to verify the utility model discloses a technological effect, the utility model discloses still provide following three experiment case:

the first experimental case:

the experimental case mainly simulates the temperature change of a plurality of monitoring sites and the effect of the rapid cooling system of the refrigeration house when the door is frequently opened and closed and goods are loaded and unloaded.

The specific experimental method is as follows:

example 1:

examples are experimental storage modified according to the schematic diagram of the storage, the recommended storage capacity of the storage is 1 ton, the length, width and height are respectively 5 × 3.5 × 2.8 m, the total amount is 49 cubic meters, and the experimental operation flow is as follows:

(1) The goods placement in the warehouse and the setting of the intelligent temperature monitoring equipment are completed, because the low-temperature storage temperature of apricot fruits is about 0 ℃ specified by the national standard GB/T17479-1998, the air outlet temperature of a daily refrigerating unit is set to be 0.3 +/-0.2 ℃, and the air outlet temperature of a rapid cooling unit is set to be-3.5 +/-0.2 ℃. According to the requirements of the national standard GB 50072-2010 refrigeratory design specification, 1 ton of apricot fruits are placed in the experimental storage warehouse of the example 1, all the apricot fruits are loaded in a conventional goods frame (the length, the width and the height of the goods frame are 0.8 × 0.55 × 0.65), and the stacking height of the goods frame is not more than 2 meters;

(2) Starting timing, and carrying out a temperature fluctuation simulation experiment for 12 hours;

(3) In the experimental period, selecting the 2 nd h as a time node, opening the warehouse door in a time period of 5min at intervals, and opening and closing the warehouse door for 3 times;

(4) Selecting the 6 th hour as a time node, opening the warehouse door in a time period of 10min at intervals, and opening and closing the warehouse door for 3 times;

(5) Selecting the 10 th hour as a time node, opening a warehouse door, manually lifting all apricot fruits in the cold warehouse out of the warehouse, manually lifting another batch of 1 ton of normal-temperature (27 +/-2 ℃) apricot fruits prepared outside the warehouse into the warehouse within 2 hours, and closing the warehouse door after completion;

(6) And after 12h period, collecting temperature monitoring data in the terminal computer, and analyzing results.

Comparative example 1:

the comparative example 1 is an unmodified ordinary refrigeration house, the recommended storage capacity of the ordinary refrigeration house is 1 ton, the length, the width and the height are respectively 5 × 3.5 × 2.8 m, the total volume is 49 cubic meters, the refrigerating unit can discharge cold air at minus 5 ℃, air outlets and air outlet channels are only arranged at the rear end and the top end of the refrigeration house, 8 temperature detection probes are arranged at the same positions of the refrigeration house in the embodiment 1, and the experimental operation flow is as follows:

(1) The goods placement and the setting of intelligent temperature monitoring equipment in the warehouse are completed, because the national standard GB/T17479-1998 stipulates that the low-temperature storage temperature of apricot fruits is 0 ℃, the air outlet temperature of a refrigerator is set to be 0.3 +/-0.2 ℃, according to the requirements of the national standard GB 50072-2010 refrigerator design specification, 1 ton of apricot fruits are placed in the experimental storage warehouse of the comparative example 1, all the apricot fruits are loaded in a conventional goods frame (the length, the width and the height of the goods frame are 0.8 x 0.55 x 0.65), and the stacking height of the goods frame is not more than 2 meters;

(2) Timing is started, and a temperature fluctuation simulation experiment is carried out for 12 hours;

(3) In an experiment period of 12h, selecting the 2 nd h as a time node, opening the warehouse door in a time period of intermittence for 5min, and opening and closing the warehouse door for 3 times;

(4) Selecting the 6 th hour as a time node, opening the warehouse door within a time period of 10min intermission, and opening and closing the warehouse door for 3 times;

(5) Selecting the 10 th hour as a time node, opening a warehouse door, manually lifting the apricot fruits in all the cold warehouses out of the warehouse, lifting another batch of 1 ton of normal-temperature (27 +/-2 ℃) apricot fruits prepared outside the warehouse into the warehouse, and closing the warehouse door after completion;

(6) And after 12h period, collecting temperature monitoring data in the terminal computer, and analyzing results.

Comparative example 2

The comparative example 2 is an unmodified ordinary refrigeration house, the recommended storage capacity of the ordinary refrigeration house is 1 ton, the length, the width and the height are respectively 5 × 3.5 × 2.8 m, the total amount is 49 cubic meters, the refrigerating unit can discharge cold air at minus 5 ℃, air outlets and air outlets are only arranged at the rear end and the top end of the refrigeration house, 8 temperature detection probes are arranged at the same positions of the refrigeration house in the embodiment 1, and the experimental operation flow is as follows:

(1) The goods placement and the setting of intelligent temperature monitoring equipment in the warehouse are completed, because the national standard GB/T17479-1998 stipulates that the low-temperature storage temperature of apricot fruits is 0 ℃, the air outlet temperature of a refrigerator is set to be 0.3 +/-0.2 ℃, according to the requirements of the national standard GB 50072-2010 refrigerator design specification, 1 ton of apricot fruits are placed in the experimental storage warehouse of the comparative example 1, all the apricot fruits are loaded in a conventional goods frame (the length, the width and the height of the goods frame are 0.8 x 0.55 x 0.65), and the stacking height of the goods frame is not more than 2 meters;

(2) Starting timing, performing a temperature fluctuation simulation experiment for 12 hours, tightly closing a warehouse door, and not performing any warehouse door opening and closing experiment operation in the period;

(3) And after 12h period, collecting temperature monitoring data in the terminal computer, and analyzing results.

The experimental results are as follows:

the results of the warehouse door temperature fluctuation opening and closing experiment performed in the 2 nd hour are shown in fig. 11, in which the front end position, the middle position and the rear end position refer to temperature detection data of three groups of corresponding probes distributed at three positions, namely, the middle position and the position far away from the warehouse door, near the warehouse door. Comparative example 2 is the data of the refrigerator in a closed state without opening the door, and it can be seen that the temperature in the refrigerator is stabilized at 0.3. + -. 0.2 ℃ in the period from the 2 nd hour to the 3 rd hour. And the comparison example 1 is that the ordinary refrigeration house is used for opening and closing the door of the refrigeration house, and the temperature fluctuation when people enter and exit in a transportation scene is simulated. The largest temperature fluctuation is the probe close to the warehouse door, and due to the close position of the probe close to the warehouse door, the largest temperature fluctuation in three door opening and closing experiments is close to 8 ℃. The temperature rise temperature fluctuation far away from the warehouse door is small, but because the refrigerating system of the whole warehouse has the characteristic of simultaneous opening and simultaneous closing, when the temperature is high, because a refrigerating machine set refrigerates in a large quantity, the phenomenon of supercooling is caused after the warehouse door is closed, the lowest temperature reaches-3.4 ℃, the lowest temperature greatly exceeds the refrigerating temperature of apricot fruits, and the damage of cold stimulation stress or frostbite to the fruits can be caused. The temperature fluctuation of the probe at the middle position is small, but the temperature fluctuation reaches 3.7 ℃ when the warehouse door is opened for the second time, and the fluctuation range reaches 3.4 ℃. Embodiment 1 uses the freezer that this patent was reformed transform, and the temperature fluctuation of stable cubic switch storehouse door that can be good, when every switch storehouse door, the fan of corresponding probe position blast air, reaches rapid cooling's purpose, maintains the homogeneity of freezer temperature.

The results of the warehouse door temperature fluctuation test conducted at the 6 th hour are shown in fig. 12, and the results are similar to those of fig. 11. Comparative example 2 the experimental results are similar to those of fig. 11 because the garage door was not opened and closed during the process. The time for opening and closing the warehouse door in the experiment is as long as 10min, and the experiment result of the comparative example 1 shows that the temperature fluctuation has more regularity and larger amplitude. In the three experiments of opening and closing the warehouse door, the temperature fluctuation amplitude of the front-end probe reaches 15.77 ℃, the highest temperature reaches 13.56 ℃, and the lowest temperature reaches-2.21 ℃. The temperature of the rear end probe is displayed after the warehouse door is closed, and the temperature of the rear end reaches-4.12 ℃ at the lowest due to the large-amount starting of the refrigerant, and the temperature greatly exceeds the freezing point of common fruits and vegetables. In example 1, the temperature fluctuation of the opening and closing door of the refrigerator, which is improved by the present invention, can be stabilized well three times for about 10 min. The highest temperature of the front, middle and rear ends is only about 1 ℃, and the lowest temperature is not lower than 0 ℃.

The results of the temperature fluctuation test for the replacement of the stored material at the 10 th hour are shown in FIG. 13, and comparative example 2 is still in a state where the door of the storage is not opened and the material is not replaced, and the temperature is stabilized at 0.3. + -. 0.4 ℃. The results of comparative example 1 show that in the experiment of replacing materials for 2 hours, the temperature of the refrigerator rapidly rises within 10min due to the process of moving out the apricot fruits in the refrigerator and lifting in the apricot fruits at the normal temperature (27 ℃) outside the refrigerator. The temperature fluctuation of the front end probe and the middle probe reaches 27.78 ℃ at most, and is close to the outside room temperature. After the warehouse door is closed, the cooling process lasts for about 1h, and temperature fluctuation exists. In the process of cooling the rear end probe, the temperature is lower than 0 ℃ from 65min to 105min of the experiment, and the lowest temperature reaches-5.04 ℃. Embodiment 1 uses the freezer structure of this patent transformation to show, the temperature fluctuation condition when the stable change material that the design of this patent can be good, and during the change material, the temperature is the highest only 1.62 ℃, and maintains about this temperature to the phenomenon of subcooling does not appear in the freezer rear end. During the use of various agricultural product cold storages, the phenomenon of material replacement and handling is very common, and the phenomenon is also the reason that many agricultural products are rotten and lose edibility in the storage process. Therefore, it is necessary to reduce the temperature fluctuations in different areas of the freezer.

Experiment case two:

the experimental case mainly simulates the change of the storage quality of agricultural products represented by stored fruits and vegetables when the door of a refrigeration house is frequently opened and closed and goods are put in and taken out, and verifies that the refrigeration house system can ensure that the temperature fluctuation of the refrigeration house is small, so that the occurrence of diseases of the stored fruits and vegetables is reduced, and the commodity quality of the stored fruits and vegetables is improved. In the experimental case, a fruit (apricot fruit) is selected as a representative agricultural product for experiment.

Example 1:

example is a laboratory storage modified according to this schematic diagram of a storage with a recommended stock quantity of 1 ton, a length, width and height of 5 × 3.5 × 2.8 m, respectively, and a total quantity of 49 cubic meters.

The experimental operation flow is as follows:

(1) The goods placement and the setting of the intelligent temperature monitoring equipment in the warehouse are completed, and the air outlet temperature of the daily refrigerating unit is set to be 0.3 +/-0.2 ℃ and the air outlet temperature of the rapid cooling unit is set to be-3.5 +/-0.2 ℃ because the low-temperature storage temperature of the apricot fruits is about 0 ℃ specified by the national standard GB/T17479-1998. According to the requirements of the national standard GB 50072-2010 refrigeratory design specification, apricot fruits with the net weight of 1 ton are placed in the experimental storage warehouse of the example 1, all the apricot fruits are loaded in a conventional goods frame (the length, the width and the height of the goods frame are 0.8 x 0.55 x 0.65), and the stacking height of the goods frame is not more than 2 meters.

(2) Starting timing, and carrying out a simulation experiment of the storage effect of the apricot fruits by temperature fluctuation for 56 days (8 weeks);

(3) In an experimental period of 60 days, selecting days 3, 10, 17, 24, 31, 38, 45 and 52 as time nodes, carrying out 18-hour warehouse door opening and closing and personnel entering and exiting experiments, wherein the frequency of opening and closing the warehouse door is that the warehouse door is opened every 30min, then the warehouse door is closed for 30min, and every 1h is a circulation group, and 18 circulation groups are carried out in total;

(4) In the 60-day experiment period, experiments are carried out at 7 th, 14 th, 21 th, 28 th, 35 th, 42 th, 49 th and 56 th days, and the experiments comprise a rotting rate experiment, a breathing intensity detection experiment, an ethylene release amount detection experiment and a hardness detection experiment (the specific experiment operation is shown in a result analysis part);

(5) After 60 days of the experimental period, data were collected and results were analyzed.

Comparative example 1:

the comparative example 1 is an unmodified ordinary refrigeration house, the recommended storage capacity of the ordinary refrigeration house is 1 ton, the length, the width and the height are respectively 5 × 3.5 × 2.8 m, the total volume is 49 cubic meters, the refrigerating unit can discharge cold air at minus 5 ℃, air outlets and air outlet channels are only arranged at the rear end and the top end of the refrigeration house, 8 temperature detection probes are arranged at the same positions of the refrigeration house in the embodiment 1, and the experimental operation flow is as follows:

(1) Apricot fruits of the same quality as in example 1 were stored and subjected to an experimental period of 60 days, and the remaining steps were the same as the operation steps (1) to (5) of example 1.

Comparative example 2:

the comparative example 2 is an unmodified ordinary refrigeration house, the recommended storage capacity of the ordinary refrigeration house is 1 ton, the length, the width and the height are respectively 5 × 3.5 × 2.8 m, the total amount is 49 cubic meters, the refrigerating unit can discharge cold air at minus 5 ℃, air outlets and air outlets are only arranged at the rear end and the top end of the refrigeration house, 8 temperature detection probes are arranged at the same positions of the refrigeration house in the embodiment 1, and the experimental operation flow is as follows:

(1) The goods placement and the setting of intelligent temperature monitoring equipment in the warehouse are completed, as the low-temperature storage temperature of apricot fruits is 0 ℃ specified by the national standard GB/T17479-1998, the air outlet temperature of the freezer is set to be 0.3 +/-0.2 ℃, and according to the requirements of the national standard GB 50072-2010 freezer design specification, 1 ton of apricot fruits with net weight are placed in the experimental storage warehouse of the comparative example 1, all the apricot fruits are loaded in a conventional goods frame (the length, width and height of the goods frame are 0.8 x 0.55 x 0.65), and the stacking height of the goods frame is not more than 2 meters;

(2) Comparative example 2 without performing the door opening and closing experiment of the refrigerator, apricot fruits having the same quality as that of example 1 were stored, and the experimental period of 60 days was performed, except that sampling was performed only at the same time as in the operation (3) of example 1, and the remaining steps were the same as the operation (1) to (5) of example 1.

The experimental results are as follows:

FIG. 14 shows the change in the decay rate of apricot fruits during 60 days of storage, which was measured and calculated by the following method:

the method is characterized in that the rotting rate of each frame of fruits is counted on 7 th, 14 th, 21 th, 28 th, 35 th, 42 th, 49 th and 56 th days in the low-temperature storage process of the apricot fruits, the rotting phenomenon of a single fruit is counted as the rotting phenomenon of the disease, and the percentage of the rotting number to the total number of the fruits is counted. The counts were repeated three times, and the formula is as follows:

rot rate (%) = (number of rotted fruits/total number of fruits) × 100;

as can be seen from the results in FIG. 14, the freezer of comparative example 1 exhibited a large increase in the rate of decay from day 14 due to the fixed frequency of the operation of the freezer door opening and closing temperature fluctuations performed weekly. The rotten state of the apricot fruits reaches 33.96% after 56 days, the rotten state of the degree is unacceptable for farmers and enterprises, and the shipment rate of the agricultural products after the storage period is greatly influenced.

The refrigeration house modified in the embodiment 1 can reduce the fluctuation of the temperature and effectively reduce the rotting rate of the stored apricot fruits in practical application, and the final rotting rate after 56 days of storage is only 2.78 percent and is slightly higher than that of a comparative example 2 (1.98 percent) without opening a storage door.

Fig. 15 shows the variation of the respiration of apricot fruits during 60 days of storage, the respiration being the most important monitoring data of fruits during preservation. Because the fruits are still in a living state in the storage process and maintain normal respiration and metabolism, the maximum purpose of storage in a refrigerator is to reduce the respiration and metabolism frequency of the fruits, thereby delaying the phenomena of fruit after-ripening and aging and prolonging the storage period of the fruits. The method for measuring the breath intensity of the apricot fruits comprises the following steps:

and 6 apricot fruits with approximate mass and volume are taken in each treatment group, the fruits are placed in a 1.5L sealing box after being cooled down for 2h from a refrigeration house, 1.0mL of gas is extracted by using a 10mL injector headspace after the fruits are sealed for 2h, the ethylene release amount and the respiratory intensity of the fruits are measured by using a gas chromatography, three needles are extracted from each sample, and the experiment is repeated for three times. The ethylene release rate is expressed in microliter of ethylene released in respiratory metabolism per kilogram of apricot fruits per hour, and the unit is microliter/kg.h, and the respiratory intensity is expressed in CO discharged per kilogram of apricot fruits per hour ₂ The number of mg in (b) is expressed in mg/kg. Multidot.h.

The detection conditions of the gas chromatography used for the determination were: the GC7890F gas chromatograph comprises a Flame Ionization Detector (FID), a CO detector ₂ A reformer, a CH-300A high-purity hydrogen generator and a stainless steel packed column (Porapak-100) with the column length of 2 m. The carrier gas is N2, the sample injection temperature is set to 120 ℃, the column temperature is set to 60 ℃, the detection temperature of ethylene is 150 ℃, and CO is used for detection ₂ The detection temperature of (2) was 360 ℃.

As can be seen from fig. 15, the apricot fruits of comparative example 2, which are respiration changes of normal apricot fruits in a freezer without temperature fluctuation treatment, exhibited a peak at day 35, which is a peak of respiration, before the peak, the apricot fruits were in a mature stage, and the apricot fruits after the peak gradually shifted to an aging and putrefactive stage. Comparative example 1 respiration peaks of apricot fruits in a refrigerator subjected to temperature fluctuation treatment occurred on day 21, apricot fruits of surface comparative example 1 were advanced to the aging stage by the influence of temperature fluctuation, and the peak height thereof was about 2 times as high as that of comparative example 2.

And embodiment 1 through the freezer that this patent was reformed transform owing to can effectual control the temperature fluctuation when opening and shutting the door, consequently can effectual time that the peak value of respiratory peak appears of maintaining, does not let the apricot fruit get into the maturity stage in advance to the peak value height is only a little higher than comparative example 2, but is less than comparative example 1 by a wide margin. This demonstrates that the stable temperature freezer design of this patent can effectively delay the ageing phenomenon in the storage process fruit.

FIG. 16 shows the variation of hardness of apricot fruits during 60 days storage, and hardness is the most intuitive index for reflecting the ripening, aging and spoilage processes of fruits, and is also the most easily detectable index. The hardness of the fruits and vegetables is reduced in the common storage process, which indicates that the storage quality of the fruits and vegetables is seriously deteriorated and the fruits and vegetables may enter the aging and putrefaction periods. The method for measuring the hardness of the apricot fruits comprises the following steps:

the hardness of the fruit is measured by a hand-held fruit hardness tester (8 mm in diameter of the probe and about 9-11mm in depth of penetration). The hardness measurement was carried out after peeling the skin of the fruits at the most plump positions on both sides of the seam line. The experiment was repeated three times. The hardness of the fruit is calculated and expressed in newton (N). From FIG. 16, it can be seen that the hardness of apricot fruits in the freezer of comparative example 2, which was not subjected to the temperature fluctuation treatment, was in a gradually decreasing state, and finally the hardness was decreased to about 50% of that of apricot fruits before storage on day 0. The apricot fruits subjected to temperature fluctuation in comparative example 1 have a greatly reduced hardness after 7 days, and a reduced rate of hardness reduction until 28 days, which is related to the occurrence of the peak respiration of the apricot fruits, and shows that the temperature fluctuation causes the stored apricot fruits to enter the aging period in advance, thus causing the quality to be deteriorated and the storage to be difficult. However, the refrigeration house modified by the patent in the embodiment 1 can effectively slow down the influence of temperature fluctuation on fruits, thereby ensuring the storage hardness quality of apricot fruits.

Experiment case three:

the experimental case mainly simulates the change of the storage quality of agricultural products represented by the chilled meat products stored in a short time in the cold storage when doors are frequently opened and closed and goods are entered and exited, and verifies that the temperature fluctuation of the cold storage system can be ensured to be small, so that the microbial infection condition and the quality loss of the chilled meat are reduced, and the commodity quality of the chilled meat is improved. In the experimental case, a livestock and poultry product (chicken) is selected as a representative agricultural product for experiment.

Example 1:

examples are experimental storage modified according to the schematic diagram of the storage, the recommended storage capacity of the storage is 1 ton, the length, width and height are respectively 5 × 3.5 × 2.8 m, the total amount is 49 cubic meters, and the experimental operation flow is as follows:

(1) The goods placement in the warehouse and the setting of the intelligent temperature monitoring equipment are completed, because the storage temperature of the chilled meat is about minus 2 ℃ to 0 ℃, the air outlet temperature of the daily refrigerating unit is set to minus 2 +/-0.2 ℃, and the air outlet temperature of the rapid cooling unit is set to minus 6 +/-0.2 ℃. 50kg of breast chicken which is just slaughtered, rapidly cooled and packaged by a plastic film seal is flatly laid in the experimental storage warehouse of the embodiment 1, and the packaged chicken is flatly laid on a shelf which is sterilized by alcohol in advance;

(2) Starting timing, and carrying out a simulation experiment of the effect of the temperature fluctuation for 6 days on the chilled chicken meat;

(3) In an experiment period of 6 days, 1 time of door opening and closing and personnel entering and exiting experiments are carried out every day, the frequency of door opening and closing of a warehouse is 30min, then 30min of door closing is carried out, and 12 circulation groups are carried out every 1 h;

(4) In the 6-day experiment period, experiments are carried out at 0 th day, 2 th day, 4 th day and 6 th day, and the experiments comprise a total bacterial count experiment, a pH value determination experiment and a loss rate experiment (see a result analysis part for specific experiment operation);

(5) After 6 days of the experimental period, data were collected and results were analyzed.

Comparative example 1:

the comparative example 1 is an unmodified ordinary refrigeration house, the recommended storage capacity of the ordinary refrigeration house is 1 ton, the length, the width and the height are respectively 5 × 3.5 × 2.8 m, the total volume is 49 cubic meters, the refrigerating unit can discharge cold air at minus 5 ℃, air outlets and air outlet channels are only arranged at the rear end and the top end of the refrigeration house, 8 temperature detection probes are arranged at the same positions of the refrigeration house in the embodiment 1, and the experimental operation flow is as follows:

(1) The chicken breasts were stored in the same quality as in example 1 for a 6-day test period, the remaining steps being exactly the same as in steps (1) to (5) of example 1.

Comparative example 2:

the comparative example 2 is an unmodified ordinary refrigeration house, the recommended storage capacity of the ordinary refrigeration house is 1 ton, the length, the width and the height are respectively 5 × 3.5 × 2.8 m, the total amount is 49 cubic meters, the refrigerating unit can discharge cold air at minus 5 ℃, air outlets and air outlets are only arranged at the rear end and the top end of the refrigeration house, 8 temperature detection probes are arranged at the same positions of the refrigeration house in the embodiment 1, and the experimental operation flow is as follows:

(1) Comparative example 2 without performing the door opening and closing experiment of the refrigerator, chicken breast meat of the same quality was stored and subjected to the experimental period of 6 days, except that sampling was performed only at the same time as in the operation step (3) of example 1, and the remaining steps were completely the same as in the steps (1) to (5) of example 1.

The experimental results are as follows:

FIG. 17 shows the change in storage loss rate of chicken during 6 days of chilled storage. The storage loss is a representative parameter of the water binding capacity of raw meat in the storage process of meat products, and the storage loss rate is measured by the following method:

the chicken breast is weighed with the weight (W1) before being packaged and then packaged. At a predetermined time point, the sample was removed, the package opened, and the surface sap was blotted dry with sterile filter paper, at which time the chicken breast weighed mass was reported as (W2).

Storage loss ratio calculation = (W1-W2)/W1 × 100%;

as can be seen from fig. 17, the meat-like storage loss increased with the storage time. After 6 days of fresh storage, the storage loss rate of the chilled fresh chicken in the refrigeratory of the comparative example 2 without temperature fluctuation is 3.77 percent, while the final loss rate of the chilled fresh chicken in the refrigeratory of the example 1 is 4.66 percent and has no obvious difference with the comparative example 2. However, the chicken loss rate in comparative example 1 was as high as 9.32% after 6 days. The design of the stable temperature fluctuation refrigeration house modified by the patent can reduce the water loss condition of the chilled chicken, thereby keeping tender and smooth edible taste quality.

FIG. 18 shows the change in pH of chicken during 6 days of chilled storage. During storage of muscle-rich chicken, pH is an important indicator of meat maturity and freshness. Muscle tissue water loss may also result in increased solute concentrations and changes in pH. The pH value of the chicken is measured by using a portable pH meter, the probe is inserted into the chicken for 3 times, and the results are averaged.

As can be seen from FIG. 18, the pH of the chicken of the comparative example 2 and the chicken of the example 1 show a tendency of gradually stabilizing after being reduced in the storage process, and two groups of data have no significant difference in the 6-day fresh-frozen storage process, which indicates that the refrigerator modified by the patent has good control on temperature fluctuation and can slow down the acidification deterioration of the chicken. In contrast, in the chicken stored in the unmodified cold storage of comparative example 1, the pH value gradually decreases and is lower than 5.0 in the storage process of 6 days, which is probably caused by that the temperature fluctuation can not inhibit the growth of microorganisms, so that the chicken is partially rotten after being infected.

FIG. 19 shows the change in the statistical number of total bacteria in chicken during 6 days of chilled storage. The chicken is rich in various nutrient substances and is very suitable for the rapid growth and propagation of microorganisms, so the microorganisms are one of the main factors causing the spoilage of the chicken in the storage process, and the growth speed of the microorganisms is inhibited, so the shelf life of the fresh chicken can be effectively prolonged. Most agricultural products are stored at low temperatures, again for the primary purpose of inhibiting the growth of microorganisms, thereby extending the shelf life. The total bacterial count of chicken was measured by using a total bacterial count test strip manufactured by 3M company, according to the test strip instructions.

It can be seen from FIG. 19 that the final total bacterial count of the chicken meat which was not subjected to the temperature fluctuation test in comparative example 2 was the lowest group, increased only from the initial value of 3.55. + -. 0.28 to 5.87. + -. 0.61 at a rate of 65.3%, whereas the final value of the total bacterial count of the chicken meat of example 1 was 8.32. + -. 1.02, which did not exceed 10, and was in an edible state. However, after the iced fresh chicken subjected to the large-scale temperature fluctuation experiment in the comparative example 1 is stored for 6 days, the final total number of bacteria is sharply increased to 31.23 +/-1.02, the growth rate is 779.7 percent, and the edibility of the chicken after storage is seriously influenced. This shows that the freezer that reforms according to this patent can obviously improve the commodity characteristic of storing agricultural product through the temperature fluctuation in stabilizing practical application.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. The utility model provides a keep fresh-keeping storehouse of cold-storage that storehouse temperature is stable, include freezer (1) and to freezer (1) inside refrigerating plant who supplies defeated air conditioning, a serial communication port, refrigerating plant includes daily refrigerating system (100) and quick refrigerating system (200), daily refrigerating system (100) switch-on freezer (1) is right freezer (1) supplies defeated air conditioning of predetermineeing the temperature, quick refrigerating system (200) switch-on freezer (1) is waited the inside temperature of freezer (1) is less than when predetermineeing the temperature again right freezer (1) supplies defeated air conditioning that is less than predetermineeing the temperature.

2. The cold storage fresh-keeping warehouse for maintaining the temperature stability of the warehouse as claimed in claim 1, further comprising a computer control system (300), a temperature monitoring device (400) for monitoring the temperature inside the freezer (1), and a normally closed electric damper (2) for connecting the rapid cooling system (200) and the freezer (1), wherein the temperature monitoring device (400) is disposed in the freezer (1) and is in data connection with the computer control system (300), and the movement of the normally closed electric damper (2) is controlled by the computer control system (300).

3. The cold storage fresh-keeping warehouse for maintaining the temperature stability of the warehouse as claimed in claim 2, wherein the computer control system (300) controls the normally closed electric damper (2) to open to allow the cold air in the rapid cooling system (200) to enter the freezer (1) when the temperature in the freezer (1) monitored by the temperature monitoring device (400) is lower than the preset temperature.

4. The cold storage fresh-keeping warehouse for maintaining the temperature stability of the warehouse as claimed in claim 3, wherein the rapid cooling system (200) comprises a rapid cooling refrigeration unit (210) and a rapid cooling air duct (220), the rapid cooling air duct (220) connects the rapid cooling refrigeration unit (210) and the warehouse (1), and the normally closed electric damper (2) is arranged at the air outlet (230) of the rapid cooling air duct (220) in a closed manner.

5. The cold-storage fresh-keeping warehouse for maintaining the temperature stability of the warehouse as claimed in claim 4, wherein the number of the air outlets (230) of the rapid cooling air duct (220) is several, and each air outlet (230) is suitable for being close to the door of the cold warehouse (1).

6. The cold-storage fresh-keeping warehouse capable of maintaining the temperature stably according to claim 5, wherein the air outlets (230) are arranged in a transverse direction toward the rear wall of the cold storage (1).

7. The cold storage and fresh-keeping warehouse for maintaining the temperature stability of the warehouse as claimed in claim 6, wherein the temperature monitoring device (400) comprises a plurality of first temperature probes (410), each first temperature probe (410) is respectively close to each air outlet (230), and the computer control system (300) controls the normally closed electric damper (2) to open when the temperature of the interior of the freezer (1) monitored by each first temperature probe (410) is lower than the preset temperature.

8. The cold storage fresh-keeping warehouse for maintaining the temperature stability of the warehouse as claimed in claim 7, further comprising a plurality of second temperature probes (420), wherein each second temperature probe (420) is respectively close to the left and right corners of the rear wall of the freezer (1), and the computer control system (300) controls the normally closed electric damper (2) to close when monitoring the internal temperature of the freezer (1) through the second temperature probes (420) to be too cold.

9. The cold-storage fresh-keeping storehouse according to claim 8, wherein the first temperature probe (410) and the second temperature probe (420) are both electric telescopic probes.

10. The cold-storage fresh-keeping warehouse for maintaining temperature stability of the warehouse as claimed in claim 1, wherein the daily refrigerating system (100) comprises a daily refrigerating unit (110) and a daily air outlet duct (120), the daily air outlet duct (120) is distributed in the center of the rear wall and the top wall of the warehouse (1) inside the warehouse (1) and is externally communicated with the daily refrigerating unit (110), and the daily refrigerating unit (110) supplies cold air with a preset temperature to the warehouse (1) through the daily air outlet duct (120).

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