Anti-fogging low-carbon control system and method for entrance and exit of low-temperature cold room of refrigeration house

Abstract

The invention discloses an anti-fogging low-carbon control system and method for an entrance and exit of a low-temperature cold room of a refrigeration house, and belongs to the technical field of anti-fogging control over the refrigeration house, and the anti-fogging low-carbon control system for the entrance and exit of the low-temperature cold room of the refrigeration house comprises a low-carbon dehumidification unit and an air curtain machine; the low-carbon dehumidification unit is communicated with at least one air curtain machine through at least one dry air supply pipe, and the low-carbon dehumidification unit and the air curtain machine are controlled by an automatic controller electrically connected with the low-carbon dehumidification unit and the air curtain machine to operate. The anti-fogging low-carbon control method for the entrance and exit of the low-temperature cold room of the refrigeration house comprises the following steps: starting up to wait for operation, introducing penetrating air for dehumidification to form dry air, and drying an adsorption dehumidification rotary wheel to discharge adsorbed moisture. And the dry air is cooled to form available low-temperature dry air, and the cold storage low-temperature cold room inlet and outlet is subjected to anti-fogging treatment through the available low-temperature dry air. According to the scheme, the energy consumption is reduced, the structure is simple, the engineering adaptability is high, and the use cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of cold storage anti-fogging control, and provides a low-carbon control system and method for anti-fogging at an entrance and exit of a low-temperature cold room of a cold storage, which has reduced energy consumption, simple structure and reduced use cost. Background Art

[0002] With the development of the national economy and the general improvement of people's living standards, cold storage is widely used in many fields such as food processing, refrigerated transportation, and medical storage. Due to the temperature and humidity difference between the cold room and the hallway, the fogging phenomenon at the entrance and exit of the cold room is widely present in a large number of cold storage projects. This fogging phenomenon has many hazards, such as causing the entrance and exit ground to be slippery and icy, affecting traffic safety; reducing the vision of forklift drivers and affecting correct operation; fogging water droplets falling on stored items, affecting the storage quality of items; fogging water droplets attached to the cold storage door, door frame, refrigeration equipment and electrical lines, affecting the service life and even causing safety accidents.

[0003] In order to prevent fogging at the entrances and exits of low-temperature cold rooms, the industry currently installs special air curtain machines above the entrances and exits of low-temperature cold rooms to generate high-speed airflow to prevent the airflow inside and outside the cold room from mixing with each other. However, since the air curtain machine directly inhales air from the hallway or cold room to form an air curtain, there is a temperature and humidity difference between the air curtain itself and the air in the cold room or the hallway, and fogging still occurs; an electric heater is installed on the door frame of the low-temperature cold room to make the surface temperature of the door frame higher than the dew point temperature, but it can only prevent fogging at the door frame, and does not prevent fogging from occurring in the entrance and exit space; a dehumidifier is installed in the hallway or low temperature to dehumidify the entire space, but due to the high investment cost, it is only used in a small number of cold storage projects with high requirements and has not been widely used.

[0004] In summary, the existing cold storage anti-fogging control device and control method have technical problems such as complex equipment structure, high energy consumption and high subsequent comprehensive operating costs. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a low-carbon control system and method for preventing fogging at the entrance and exit of a low-temperature cold room of a cold storage, which reduces energy consumption, has a simple structure and reduces use costs.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a low-carbon control system for preventing fogging at the entrance and exit of a low-temperature cold room of a cold storage, comprising a low-carbon dehumidification unit and an air curtain machine; wherein: the low-carbon dehumidification unit is connected to at least one air curtain machine through at least one dry air supply pipe, and the low-carbon dehumidification unit and the air curtain machine are controlled and operated by an automatic controller electrically connected thereto;

[0008] The low-carbon dehumidification unit is located on the floor of the cold storage corridor and near the entrance and exit of the low-temperature cold storage. The air curtain machine is fixed on the wall above the refrigerated door at the entrance and exit of the low-temperature cold storage.

[0009] The low-carbon dehumidification unit includes a casing, and an adsorption dehumidification rotor located in the inner cavity of the casing. The inner cavity of the casing has two independent dehumidification chambers and an adsorption cooling chamber up and down. The adsorption dehumidification disc of the adsorption dehumidification rotor is located in both the dehumidification chamber and the adsorption cooling chamber at the same time. In the dehumidification chamber, a regeneration air filter, a heater a, a temperature sensor b, and an exhaust fan are arranged in sequence from left to right. The adsorption dehumidification rotor is located between the temperature sensor b and the exhaust fan. In the adsorption cooling chamber, a dehumidified air filter, a blower a, a dew point temperature sensor, a cooling cooler, and a temperature sensor a are arranged in sequence from right to left. The adsorption dehumidification rotor is located between the dehumidified air filter and the blower a.

[0010] The casing is provided with a dehumidified air inlet, a dehumidified air outlet, a regeneration air inlet, and a regeneration air outlet. The dehumidified air inlet and the dehumidified air outlet are respectively communicated with the right cavity part and the left cavity part of the adsorption cooling chamber. The regeneration air inlet and the regeneration air outlet are respectively communicated with the left cavity part and the right cavity part of the dehumidification chamber. The regeneration air inlet and the regeneration air outlet are respectively communicated with the outdoor atmosphere through a regeneration air duct and a regeneration air discharge duct. The dehumidified air outlet is communicated with the air inlet end of the dry air supply duct.

[0011] The cooling cooler is communicated with the corridor refrigeration system of the cold storage through a refrigerant pipeline a.

[0012] The heater a, the temperature sensor b, the exhaust fan, the adsorption dehumidification rotor, the blower a, the dew point temperature sensor, the cooling cooler, and the temperature sensor a are all electrically connected to an automatic controller and controlled by the automatic controller to operate.

[0013] To improve the dehumidification effect, in the above solution, further: A heater b is arranged in the dehumidification chamber. The heater b is located between the heater a and the temperature sensor b. The heater b is electrically connected to the automatic controller and controlled by the automatic controller to operate.

[0014] To further reduce energy consumption and simplify the structure, in the above solution, further: The heater a is communicated with the cold storage cold room condensation heat recovery system through a circulation pipeline b.

[0015] To facilitate the installation of the air curtain machine and the implementation, in the above solution, further: The dry air supply duct adopts a fiber fabric air duct.

[0016] To ensure the adsorption and dehumidification stability of the adsorption dehumidification rotor, in the above solution, further: the rotating shaft of the adsorption dehumidification rotor is fixed on the inner wall of the partition or the casing, and the adsorption dehumidification rotor is connected to a pulley or sprocket on the drive shaft of the adsorption dehumidification rotor drive motor through a belt or a chain;

[0017] A bypass pipe is provided between the air outlet side of the dehumidified air filter and the air inlet side of the air supply fan a, and a bypass electric programmable regulating valve is provided on the bypass pipe;

[0018] The bypass electric programmable regulating valve and the adsorption dehumidification rotor drive motor are both electrically connected to the automatic controller and controlled by the automatic controller to operate.

[0019] To ensure the operation stability of the adsorption dehumidification rotor, in the above solution, further: differential pressure sensors are provided on both sides of the adsorption dehumidification rotor.

[0020] To ensure the air supply effect, in the above solution, further: the air curtain machine includes an air induction static pressure box, and a dry air inlet communicating with the inner cavity of the air induction static pressure box is provided on the air induction static pressure box. The dry air inlet is communicated with the air outlet end of the dry air supply air duct. A blower b is fixed on the bottom plate of the inner cavity of the air induction static pressure box, and the blower b is electrically connected to the automatic controller and controlled by the automatic controller to operate.

[0021] To further improve the air supply effect and facilitate the installation of the air curtain machine, in the above solution, further: the inner cavity of the air induction static pressure box is communicated with the inner cavity of the air guiding static pressure box, and an air outlet communicating with the inner cavity of the air guiding static pressure box is provided at the lower end of the air guiding static pressure box.

[0022] To facilitate the operation of the automatic controller, in the above solution, further: the automatic controller is fixed on the outer wall of the casing of the low-carbon dehumidification unit.

[0023] The present invention provides a control method for the anti-fogging low-carbon control system at the entrance and exit of the low-temperature cold storage compartment of the above, wherein;

[0024] It includes the following steps:

[0025] The first step is to start up and wait for operation,

[0026] The worker starts the automatic controller, and the automatic controller controls the low-carbon dehumidification unit and the air curtain machine to start synchronously before the start of the cold storage compartment loading and unloading period and stop synchronously after the end of the cold storage compartment loading and unloading period. During other periods, the entire system is in a shutdown state;

[0027] The second step is to introduce the air in the vestibule for dehumidification to form dry air, and perform drying and discharging of the adsorbed moisture on the adsorption dehumidification rotor,

[0028] The automatic controller controls the air supply fan a of the low-carbon dehumidification unit to suck air from the cold storage corridor. This air passes through the dehumidified air filter and the adsorption dehumidification rotating wheel in sequence to form dry air;

[0029] When the dew point temperature fed back by the dew point temperature sensor to the automatic controller is 7°C lower than the dry bulb temperature in the cold room, the automatic controller first reduces the dehumidification amount by reducing the rotation speed of the adsorption dehumidification rotating wheel drive motor. Secondly, the automatic controller reduces the dehumidification amount by lowering the heating amount of heater a, or by lowering the heating amounts of heater a and heater b;

[0030] When the dew point temperature fed back by the dew point temperature sensor to the automatic controller is 2°C higher than the dry bulb temperature in the cold room, the automatic controller first increases the dehumidification amount by increasing the rotation speed of the adsorption dehumidification rotating wheel drive motor. Secondly, the automatic controller increases the dehumidification amount by raising the heating amount of heater a, or by raising the heating amounts of heater a and heater b;

[0031] The automatic controller controls the exhaust fan of the low-carbon dehumidification unit to process the adsorbed moisture discharged from the adsorption dehumidification rotating wheel;

[0032] Under the action of the exhaust fan, the normal temperature air outside the entire cold storage is introduced into heater a, or heated by heater a and heater b through the regeneration air intake duct to form heated air. This heated air passes through the adsorption dehumidification rotating wheel to carry out drying treatment on it while taking away the adsorbed moisture, so that the heated air and the adsorbed moisture form regeneration air together. This regeneration air is discharged from the regeneration air discharge duct outside the entire cold storage;

[0033] During the heating process of the normal temperature air, heater a is preferentially and fully used. When the temperature fed back by temperature sensor b to the automatic controller is lower than the lowest temperature required for regeneration, the automatic controller controls heater a and heater b to heat simultaneously;

[0034] In the third step, the dry air is cooled to form available low-temperature dry air.

[0035] Temperature sensor a feeds back the temperature of the dry air to the automatic controller. The automatic controller controls the cooling cooler to cool the dry air so that the temperature of the dry air is reduced to the corridor temperature to form low-temperature dry air;

[0036] In the fourth step, the available low-temperature dry air is used to prevent fogging at the entrances and exits of the low-temperature cold rooms in the cold storage.

[0037] The air supply fan b conveys the available low-temperature dry air formed in the third step to the air supply opening to form a defogging air curtain.

[0038] The beneficial effects of the present invention are:

[0039] (1) In view of the characteristics of cold storage, the present invention highly combines the dehumidification technology with the air curtain technology. When the adsorption dehumidification rotary wheel dries and removes moisture, it recovers and utilizes the condensation heat of the cold room refrigeration system, and reasonably utilizes the outdoor normal temperature air. The whole system can not only effectively prevent fogging at the entrances and exits of low-temperature cold rooms, but also save energy and be low-carbon.

[0040] (2) For the cooling of the dehumidified air after dehumidification, the present invention adopts a finned evaporative cooler. The refrigeration cycle medium and operating parameters are the same as those of the cold storage corridor refrigeration system, and the cooling cooler is connected to the cold storage corridor refrigeration system through the refrigerant circulation pipeline. There is no need to set up an independent refrigeration system, which can not only ensure that the temperature of the available low-temperature dry air is consistent with the corridor temperature, avoid the influence of the dry air curtain on the storage quality, but also give play to the high energy efficiency advantage of the centralized refrigeration system of the cold storage itself, simplify the structure of the low-carbon dehumidification mechanism, and reduce the operation cost.

[0041] (3) The low-carbon dehumidification unit and the high-efficiency air curtain machine of the present invention are installed through a fiber fabric air duct, which is convenient for installation and implementation. And the high-efficiency air curtain machines installed at the entrances and exits of different low-temperature cold rooms can share a set of low-carbon dehumidification units, which can further reduce costs.

[0042] (4) The automatic controller of the present invention can not only automatically adjust the operation of each processing device according to the detected different operating state parameters, but also be connected to the overall intelligent management system of the cold storage itself as needed, with a high degree of automation and convenient operation and management.

[0043] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0045] Figure 1 is a schematic structural diagram of the present invention;

[0046] Figure 2 is a schematic control principle diagram of the present invention;

[0047] Reference numerals: 1, low-carbon dehumidification unit; 2, air curtain machine; 3, dry air supply duct; 4, automatic controller; 5, air supply port; 6, casing; 7, adsorption dehumidification runner; 8, adsorption cooling chamber; 9, dehumidification chamber; 10, regeneration air filter; 11, heater a; 12, temperature sensor b; 13, exhaust fan; 14, dehumidified air filter; 15, supply fan a; 16, dew point temperature sensor; 17, cooling cooler; 18, temperature sensor a; 19, dehumidified air inlet; 20, dehumidified air outlet; 21, regeneration air inlet; 22, regeneration air outlet; 23, regeneration air induction duct; 24, regeneration air discharge duct; 25, refrigerant pipeline a; 26, cold corridor refrigeration system of cold storage; 27, heater b; 28, circulation pipeline b; 29, cold room condensation heat recovery system of cold storage; 30, partition board; 31, adsorption dehumidification runner drive motor; 32, bypass electric programmable regulating valve; 33, differential pressure sensor; 34, induced air static pressure box; 35, dry air inlet; 36, supply fan b; 37, air guiding static pressure box. Detailed implementation manners

[0048] The present invention will be further described below in conjunction with the detailed implementation manners. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted. The drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Under the condition of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0049] In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0050] As Figures 1 to 2 shown, the anti-fogging low-carbon control system for the entrance and exit of the low-temperature cold room of the cold storage mentioned in the present invention includes a low-carbon dehumidification unit 1 and an air curtain machine 2; wherein: the low-carbon dehumidification unit 1 is connected to at least one air curtain machine 2 through at least one dry air supply duct 3, and the low-carbon dehumidification unit 1 and the air curtain machine 2 are controlled to operate by an automatic controller 4 electrically connected thereto;

[0051] The low-carbon dehumidification unit 1 is located on the floor of the cold storage corridor and close to the entrance and exit of the low-temperature cold room, and the air curtain machine 2 is fixed on the wall above the cold storage door at the entrance and exit of the low-temperature cold room;

[0052] The low-carbon dehumidification unit 1 includes a casing 6 and an adsorption dehumidification rotor 7 located in the inner cavity of the casing 6. The inner cavity of the casing 6 has two independent dehumidification chambers 9 and an adsorption cooling chamber 8, and the adsorption dehumidification disk of the adsorption dehumidification rotor 7 is located in both the dehumidification chamber 9 and the adsorption cooling chamber 8. In the dehumidification chamber 9, a regeneration air filter 10, a heater a 11, a temperature sensor b 12, and an exhaust fan 13 are arranged in sequence from left to right. The adsorption dehumidification rotor 7 is located between the temperature sensor b 12 and the exhaust fan 13. In the adsorption cooling chamber 8, a dehumidified air filter 14, a blower a 15, a dew point temperature sensor 16, a cooling cooler 17, and a temperature sensor a 18 are arranged in sequence from right to left. The adsorption dehumidification rotor 7 is located between the dehumidified air filter 14 and the blower a 15.

[0053] The casing 6 is provided with a dehumidified air inlet 19, a dehumidified air outlet 20, a regeneration air inlet 21, and a regeneration air outlet 22. The dehumidified air inlet 19 and the dehumidified air outlet 20 are respectively communicated with the right cavity part and the left cavity part of the adsorption cooling chamber 8. The regeneration air inlet 21 and the regeneration air outlet 22 are respectively communicated with the left cavity part and the right cavity part of the dehumidification chamber 9, and the regeneration air inlet 21 and the regeneration air outlet 22 are respectively communicated with the outdoor atmosphere through a regeneration air duct 23 and a regeneration air discharge duct 24. The dehumidified air outlet 20 is communicated with the intake end of a dry air supply duct 3.

[0054] The cooling cooler 17 is communicated with the corridor refrigeration system 26 of the cold storage through a refrigerant pipeline a 25.

[0055] The heater a 11, the temperature sensor b 12, the exhaust fan 13, the adsorption dehumidification rotor 7, the blower a 15, the dew point temperature sensor 16, the cooling cooler 17, and the temperature sensor a 18 are all electrically connected to an automatic controller 4 and controlled by the automatic controller 4 to operate. In this embodiment, the heater a 11 is a finned gas-liquid heater, and the cooling cooler 17 is a finned evaporative cooler. The cooling cooler 17 is communicated with the corridor refrigeration system 26 of the cold storage through a refrigerant pipeline a 25. The refrigeration cycle medium and operating parameters of the cooling cooler 17 are the same as those of the corridor refrigeration system 26 of the cold storage, which simplifies the structure of the entire system and also realizes low-carbon dehumidification. There is no need to set up an independent refrigeration system, which can not only ensure that the temperature of the dry air is the same as the corridor temperature but also give full play to the high energy efficiency of the large refrigeration system. During specific implementation, the automatic controller 4 is electrically connected to the overall intelligent management system of the cold storage to realize the full intelligent operation of the entire cold storage.

[0056] To improve the dehumidification effect, in the above embodiments, preferably: a heater b27 is provided in the dehumidification chamber 9, and the heater b27 is located between the heater a11 and the temperature sensor b12. The heater b27 is electrically connected to the automatic controller 4 and is controlled by the automatic controller 4 to operate. In this embodiment, the heater b27 is an electric heater.

[0057] To further reduce energy consumption and simplify the structure, in the above embodiments, preferably: the heater a11 is connected to the cold room condensation heat recovery system 29 of the cold storage through a circulation pipeline b28. By making full use of the waste heat of the cold storage corridor refrigeration system 26, while simplifying the structure of this solution, low-carbon dehumidification is further realized.

[0058] To facilitate the installation of the air curtain machine 2 and implementation, in the above embodiments, preferably: the dry air supply duct 3 is made of a fiber fabric duct, and the adsorption dehumidification wheel 7 is a low-temperature regeneration type adsorption dehumidification wheel.

[0059] To ensure the adsorption and dehumidification stability of the adsorption dehumidification wheel 7, in the above embodiments, preferably: the rotating shaft of the adsorption dehumidification wheel 7 is fixed on the inner wall of the partition plate 30 or the casing 6, and the adsorption dehumidification wheel 7 is connected to the pulley or sprocket on the drive shaft of the adsorption dehumidification wheel drive motor 31 through a belt or a chain;

[0060] A bypass pipe is provided between the air outlet side of the dehumidified air filter 14 and the air inlet side of the air supply fan a15, and a bypass electric programmable regulating valve 32 is provided on the bypass pipe;

[0061] Both the bypass electric programmable regulating valve 32 and the adsorption dehumidification wheel drive motor 31 are electrically connected to the automatic controller 4 and are controlled by the automatic controller 4 to operate. In this embodiment, the adsorption dehumidification wheel drive motor 31 is fixed on the inner bottom plate of the casing 6. The regeneration air filter 10, the heater a11, the temperature sensor b12, and the exhaust fan 13 are fixed on the top plate surface of the partition plate 30 as required; the dehumidified air filter 14, the air supply fan a15, the dew point temperature sensor 16, the cooling cooler 17, and the temperature sensor a1 are fixed on the bottom plate surface of the inner cavity of the casing 6. In this embodiment, the bypass electric programmable regulating valve 32 can directly send a certain amount of air inhaled from the cold storage corridor that has not been dehumidified by the adsorption dehumidification wheel 7 to the air inlet side of the air supply fan a15 as required.

[0062] To ensure the operation stability of the adsorption dehumidification wheel 7, in the above embodiments, preferably: differential pressure sensors 33 are provided on both sides of the adsorption dehumidification wheel 7. In this embodiment, when the data monitored by the differential pressure sensors 33 exceeds the set value, the automatic controller 4 issues a cleaning reminder signal.

[0063] To ensure the air supply effect, in the above embodiments, preferably: the air curtain machine 2 includes an air induction static pressure box 34, on which a dry air inlet 35 communicating with its inner cavity is provided. The dry air inlet 35 is communicated with the outlet end of the dry air supply air duct 3. A blower b 36 is fixed on the bottom plate of the inner cavity of the air induction static pressure box 34. The blower b 36 is electrically connected to the automatic controller 4 and is controlled by the automatic controller 4 to operate.

[0064] To further improve the air supply effect and facilitate the installation of the air curtain machine 2, in the above embodiments, preferably: the inner cavity of the air induction static pressure box 34 is communicated with the inner cavity of the air guiding static pressure box 37. A air supply port 5 communicating with the inner cavity of the air guiding static pressure box 37 is provided at the lower end of the air guiding static pressure box 37.

[0065] To facilitate the operation of the automatic controller 4, in the above embodiments, preferably: the automatic controller 4 is fixed on the outer wall of the casing 6 of the low-carbon dehumidification unit 1.

[0066] The present invention also provides a control method for the anti-fogging low-carbon control system at the entrance and exit of the low-temperature cold storage compartment of the above, wherein;

[0067] It includes the following steps:

[0068] The first step is to start up and wait for operation.

[0069] The worker starts the automatic controller 4. The automatic controller 4 controls the low-carbon dehumidification unit 1 and the air curtain machine 2 to start synchronously before the start of the cold storage compartment loading and unloading period, and to stop synchronously after the end of the cold storage compartment loading and unloading period. During other periods, the entire system is in a shutdown state.

[0070] The second step is to introduce the air in the vestibule for dehumidification to form dry air, and to perform the treatment of drying and discharging the adsorbed moisture on the adsorption dehumidification rotor 7.

[0071] The automatic controller 4 controls the blower a 15 of the low-carbon dehumidification unit 1 to suck air from the cold storage vestibule. The air passes through the dehumidified air filter 14 and the adsorption dehumidification rotor 7 in sequence to form dry air.

[0072] When the dew point temperature fed back by the dew point temperature sensor 16 to the automatic controller 4 is 7°C lower than the dry bulb temperature of the cold storage compartment, the automatic controller 4 first reduces the dehumidification amount by reducing the rotation speed of the adsorption dehumidification rotor drive motor 31. Secondly, the automatic controller 4 reduces the dehumidification amount by reducing the heating amount of the heater a 11, or by reducing the heating amounts of the heater a 11 and the heater b 27.

[0073] When the dew point temperature fed back by the dew point temperature sensor 16 to the automatic controller 4 is 2°C higher than the dry bulb temperature in the cold storage, the automatic controller 4 first increases the dehumidification amount by increasing the rotation speed of the adsorption dehumidification rotor drive motor 31. Secondly, the automatic controller 4 increases the dehumidification amount by increasing the heating amount of the heater a11, or increasing the heating amounts of the heater a11 and the heater b27;

[0074] The automatic controller 4 controls the exhaust fan 13 of the low-carbon dehumidification unit 1 to dry and discharge the adsorbed moisture from the adsorption dehumidification rotor 7.

[0075] Under the action of the exhaust fan 13, the normal temperature air outside the entire cold storage is introduced into the heater a11 through the regeneration air intake duct 23, or forms heated air after being heated by the heater a11 and the heater b27. While passing through the adsorption dehumidification rotor 7 for drying treatment, the heated air takes away the adsorbed moisture, and the heated air and the adsorbed moisture form regeneration air together, and the regeneration air is discharged outside the entire cold storage through the regeneration air discharge duct 24;

[0076] During the heating process of the normal temperature air, the heater a11 is preferentially and fully used. When the temperature fed back by the temperature sensor b12 to the automatic controller 4 is lower than the lowest temperature required for regeneration, the automatic controller 4 controls the heater a11 and the heater b27 to heat simultaneously;

[0077] In the third step, the dry air is cooled to form available low-temperature dry air.

[0078] The temperature sensor a18 feeds back the temperature of the dry air to the automatic controller 4, and the automatic controller 4 controls the cooling cooler 17 to cool the dry air so that the temperature of the dry air is reduced to the through-passage temperature, forming low-temperature dry air;

[0079] In the fourth step, the entrance and exit of the low-temperature cold storage in the cold storage are anti-fogged by the available low-temperature dry air.

[0080] The air supply fan b36 transports the available low-temperature dry air formed in the third step to the air supply port 5 to form an anti-fog air curtain.

[0081] In the above embodiments, all components are commercially available products. For those components whose installation and fixation methods are not clearly described, conventional fixation can be adopted as needed. The description of the programmed control part is for those skilled in the art to understand the present solution, and it is not the invention point to be protected by the present solution.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A low-carbon control system for preventing fogging at the entrance and exit of a cold storage low-temperature cold room, comprising a low-carbon dehumidification unit (1) and an air curtain machine (2); characterized in that: The low-carbon dehumidification unit (1) is connected to at least one air curtain machine (2) through at least one dry air supply duct (3), and the low-carbon dehumidification unit (1) and the air curtain machine (2) are controlled to operate by an automatic controller (4) electrically connected thereto; The low-carbon dehumidification unit (1) is located on the floor of the cold storage corridor and near the entrance and exit of the low-temperature cold storage, and the air curtain machine (2) is fixed on the wall above the refrigerated door at the entrance and exit of the low-temperature cold storage; The low-carbon dehumidification unit (1) includes a casing (6), an adsorption dehumidification wheel (7) located in the inner cavity of the casing (6). The inner cavity of the casing (6) has two independent dehumidification chambers (9) and an adsorption cooling chamber (8) above and below. The adsorption dehumidification disc of the adsorption dehumidification wheel (7) is located in both the dehumidification chamber (9) and the adsorption cooling chamber (8) at the same time; in the dehumidification chamber (9), a regeneration air filter (10), a heater a (11), a temperature sensor b (12), and an exhaust fan (13) are arranged in sequence from left to right. The adsorption dehumidification wheel (7) is located between the temperature sensor b (12) and the exhaust fan (13); in the adsorption cooling chamber (8), a dehumidified air filter (14), a blower a (15), a dew point temperature sensor (16), a cooling cooler (17), and a temperature sensor a (18) are arranged in sequence from right to left. The adsorption dehumidification wheel (7) is located between the dehumidified air filter (14) and the blower a (15); The casing (6) is provided with a dehumidified air inlet (19), a dehumidified air outlet (20), a regeneration air inlet (21), and a regeneration air outlet (22); the dehumidified air inlet (19) and the dehumidified air outlet (20) are respectively communicated with the right cavity part and the left cavity part of the adsorption cooling chamber (8); the regeneration air inlet (21) and the regeneration air outlet (22) are respectively communicated with the left cavity part and the right cavity part of the dehumidification chamber (9). The regeneration air inlet (21) and the regeneration air outlet (22) are respectively communicated with the outdoor atmosphere through a regeneration air induction duct (23) and a regeneration air discharge duct (24); the dehumidified air outlet (20) is communicated with the air inlet end of the dry air supply duct (3); The cooling cooler (17) is connected to the corridor refrigeration system (26) of the cold storage through a refrigerant pipeline a (25); The heater a (11), the temperature sensor b (12), the exhaust fan (13), the adsorption dehumidification wheel (7), the blower a (15), the dew point temperature sensor (16), the cooling cooler (17), and the temperature sensor a (18) are all electrically connected to the automatic controller (4) and controlled to operate by the automatic controller (4); 2. The low-temperature cold storage room entrance and exit anti-fog low-carbon control system according to claim 1, characterized in that: A heater b (27) is arranged in the dehumidification chamber (9), and the heater b (27) is located between the heater a (11) and the temperature sensor b (12). The heater b (27) is electrically connected to the automatic controller (4) and controlled to operate by the automatic controller (4); 3. The low-temperature cold storage entrance and exit anti-fogging and low-carbon control system according to claim 2, characterized in that: The heater a (11) is connected to the cold storage cold room condensation heat recovery system (29) through a circulation pipeline b (28); 4. The low-temperature cold storage cold room entrance and exit anti-fogging and low-carbon control system according to claim 3, characterized in that: The dry air supply duct (3) is made of a fiber fabric air duct.

5. The low-temperature cold storage cold room entrance and exit anti-fogging low-carbon control system according to claim 4, characterized in that: The rotating shaft of the adsorption dehumidification rotor (7) is fixed on the inner wall of the partition plate (30) or the machine housing (6), and the adsorption dehumidification rotor (7) is connected to a pulley or sprocket on the drive shaft of the adsorption dehumidification rotor drive motor (31) through a belt or a chain; A bypass pipe is provided between the air outlet side of the dehumidifying air filter (14) and the air inlet side of the air blower a (15), and a bypass electric programmable regulating valve (32) is provided on the bypass pipe; Both the bypass electric programmable regulating valve (32) and the adsorption dehumidification rotor drive motor (31) are electrically connected to the automatic controller (4) and are controlled by the automatic controller (4) to operate.

6. The low-temperature cold storage cold room entrance and exit anti-fog low-carbon control system according to claim 5, characterized in that: Differential pressure sensors (33) are provided on both sides of the adsorption dehumidification rotor (7).

7. The low-temperature cold storage entrance and exit anti-fogging and low-carbon control system according to claim 6, characterized in that: The air curtain machine (2) includes an induced air static pressure box (34), and a dry air inlet (35) communicating with the inner cavity thereof is provided on the induced air static pressure box (34). The dry air inlet (35) is communicated with the air outlet end of the dry air supply air pipe (3). A blower b (36) is fixed on the bottom plate of the inner cavity of the induced air static pressure box (34), and the blower b (36) is electrically connected to the automatic controller (4) and is controlled by the automatic controller (4) to operate.

8. The low-temperature cold storage cold room entrance and exit anti-fogging low-carbon control system according to claim 7, characterized in that: The inner cavity of the induced air static pressure box (34) is communicated with the inner cavity of the air guiding static pressure box (37), and an air outlet (5) communicating with the inner cavity of the air guiding static pressure box (37) is provided at the lower end of the air guiding static pressure box (37).

9. The low-temperature cold storage cold room entrance and exit anti-fogging low-carbon control system according to claim 8, characterized in that: The automatic controller (4) is fixed on the outer wall of the machine housing (6) of the low-carbon dehumidification unit (1).

10. A control method for a low-temperature cold storage cold room entrance and exit anti-fogging low-carbon control system as described in claims 1 to 9, characterized in that; It includes the following steps: The first step is to start up and wait for operation. The worker starts the automatic controller (4), and the automatic controller (4) controls the low-carbon dehumidification unit (1) and the air curtain machine (2) to start synchronously in advance before the cold room goods in and out period starts, and to stop synchronously after the cold room goods in and out period ends. In other periods, the entire system is in a shutdown state; The second step is to introduce the air in the vestibule for dehumidification to form dry air, and to dry and discharge the adsorbed moisture of the adsorption dehumidification rotor (7). The automatic controller (4) controls the air blower a (15) of the low-carbon dehumidification unit (1) to suck air from the cold storage vestibule, and the air forms dry air after passing through the dehumidifying air filter (14) and the adsorption dehumidification rotor (7) in sequence; When the dew point temperature fed back by the dew point temperature sensor (16) to the automatic controller (4) is 7 °C lower than the dry bulb temperature of the cold room, the automatic controller (4) first reduces the dehumidification amount by reducing the rotation speed of the adsorption dehumidification rotor drive motor (31), and secondly, the automatic controller (4) reduces the dehumidification amount by reducing the heating amount of the heater a (11), or by reducing the heating amounts of the heater a (11) and the heater b (27); When the dew point temperature fed back by the dew point temperature sensor (16) to the automatic controller (4) is higher than 2°C below the dry bulb temperature in the cold storage, the automatic controller (4) first increases the dehumidification amount by increasing the rotation speed of the adsorption dehumidification rotary wheel drive motor (31), and secondly, the automatic controller (4) increases the dehumidification amount by increasing the heating amount of heater a (11), or by increasing the heating amounts of heater a (11) and heater b (27); The automatic controller (4) controls the exhaust fan (13) of the low-carbon dehumidification unit (1) to dry and discharge the adsorbed moisture from the adsorption dehumidification rotary wheel (7); Under the action of the exhaust fan (13), the normal temperature air outside the whole cold storage is introduced through the regeneration air intake duct (23) to heater a (11), or to heater a (11) and heater b (27) for heating to form heated air. This heated air passes through the adsorption dehumidification rotary wheel (7) to dry it while taking away the adsorbed moisture, so that the heated air and the adsorbed moisture form regeneration air together, and this regeneration air is discharged outside the whole cold storage through the regeneration air discharge duct (24); During the heating process of the normal temperature air, heater a (11) is preferentially and fully used. When the temperature fed back by the temperature sensor b (12) to the automatic controller (4) is lower than the lowest temperature required for regeneration, the automatic controller (4) controls heater a (11) and heater b (27) to heat simultaneously; Thirdly, cool down the dry air to form available low-temperature dry air; The temperature sensor a (18) feeds back the temperature of the dry air to the automatic controller (4), and the automatic controller (4) controls the cooling cooler (17) to cool down the dry air so that the temperature of the dry air is reduced to the cross-passage temperature to form low-temperature dry air; Fourthly, prevent fogging at the entrances and exits of the low-temperature cold storage in the cold storage with the available low-temperature dry air; The air supply fan b (36) transports the available low-temperature dry air formed in the third step to the air supply opening (5) to form an anti-fog air curtain.

Images