Natural flowing type refrigeration house temperature control airflow circulation control system

Abstract

The invention discloses a natural flow type refrigeration house temperature control airflow circulation control system implementation which comprises an air conditioning system installed at the upper end of a refrigeration house, the air conditioning system is connected with a controller, and the controller is connected with temperature sensors installed at the upper end and the lower end of a refrigeration house goods shelf respectively. The device is characterized by further comprising a vertical airflow channel fixedly arranged in a space area on one side of a storage rack of the cold storage in the vertical direction, a heat preservation layer is arranged on the vertical airflow channel along the peripheral side wall, the upper end and the lower end of the side, facing the storage rack, of the airflow channel are each provided with an air opening, and valves and valve opening and closing control devices are arranged at the air openings; the valve opening-closing control device is used for controlling the valve to be opened when the upper temperature of the goods shelf is higher than the refrigeration temperature. The cold lake phenomenon can be solved in a targeted mode without extra energy input, it is avoided that temperature unbalance affects goods storage, the cold energy utilization efficiency can be improved, and the energy consumption of the refrigeration house is better reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold storage temperature control, and particularly relates to a natural flow type cold storage temperature control air flow circulation control system. BACKGROUND

[0002] The cold storage refers to an environment different from the outdoor temperature or humidity created by artificial means, and is a constant temperature and humidity storage device for food, liquid, chemical industry, medicine, vaccine, scientific experiment and the like. Compared with the refrigerator, the cold storage has a larger refrigeration area and has a common refrigeration principle. In the late 19th century, the cold storage has been an important part of the logistics industry. Especially with the rise of online shopping in the modern society, the logistics industry is developing more and more rapidly. There is a requirement for low-temperature frozen delivery of a large number of fresh fruits and vegetables, aquatic products, dairy products and meat food during transportation, and the cold storage needs to be set in the logistics system for storage, and the temperature requirement range of various cold storages is different.

[0003] In the existing cold storage, when the cold storage capacity is large, the goods are usually placed on the shelves and arranged in a neat stack, leaving a channel for people to walk and cold air to enter, and then a cooling air supply mode from the top is adopted to achieve cooling and refrigeration. The cold storage ventilation refrigeration is usually intermittent, and the cold storage air conditioner stops running after reaching the set temperature. The cold air supplied by the air conditioning system is usually lower than the cold storage temperature requirement, and a temperature probe is arranged in the cold storage to detect and monitor the temperature in the cold storage and supply air cooling in time.

[0004] After the air conditioner stops, the cold air with high density will deposit near the floor of the cold storage, forming a "cold lake". Due to the heat dissipation of the goods, the air with high temperature will gather in the higher space of the cold storage, forming a large vertical temperature gradient difference. The consequence of this situation is that the temperature near the ground is low, and if the ground insulation is not good, frost heaving and condensation will occur. The goods at the high position of the shelf will have a shortened shelf life due to the high temperature.

[0005] In order to avoid the heat dissipation of the goods on the shelf from causing temperature reduction and affecting the storage effect, the cold storage refrigeration system in the prior art can only set the temperature probe at the upper end of the shelf, and start the air conditioning system to supply cold air for cooling as soon as the temperature at the upper end of the shelf is higher than the refrigeration temperature of the cold storage, so as to ensure that the temperature at the upper part of the shelf meets the refrigeration requirement. This will cause the following defects: 1. The air conditioner is frequently started, the cold energy utilization efficiency is low, and the requirement of energy saving and consumption reduction is not met. 2. The internal temperature of the cold storage is unbalanced, the cold lake phenomenon at the lower part is more serious, and problems such as frost heaving and condensation are more likely to occur, and the temperature at the lower end of the shelf is too low, which may also affect the storage effect of the goods.

[0006] In order to solve the cold lake phenomenon of the cold storage during the air conditioning stop running and improve the cold storage cold quantity utilization efficiency, the applicant considers designing a cold storage air flow adjusting temperature control method, which detects the temperature at the upper and lower ends of the shelf in real time, and the method is characterized in that, after the air supply of the air conditioner stops, when it is detected that the temperature at the upper end of the shelf is higher than the upper limit of the refrigeration temperature range, the air flow at the lower end of the cold storage is introduced to the upper end of the cold storage through the vertical air flow channel arranged in the space area on one side of the cold storage shelf to circulate; when the temperature at the lower end of the shelf is also higher than the upper limit of the refrigeration temperature range, the air conditioner system at the top of the cold storage is controlled to send cold air for cooling; when the temperatures at the upper and lower ends of the shelf are both lower than the lower limit of the refrigeration temperature range, the air supply of the air conditioner is controlled to stop, so as to realize the control circulation.

[0007] However, how to realize the circulation of the air flow at the lower end of the cold storage to the upper end of the cold storage through the vertical air flow channel without additional energy consumption and better energy saving and loss become problems to be further considered and solved by the applicant. SUMMARY

[0008] In view of the above problems of the prior art, the technical problem to be solved by the present application is how to provide a natural flow type cold storage temperature control air flow circulation control system which can solve the cold lake phenomenon without additional energy consumption, avoid temperature imbalance and affect the preservation of goods, and improve the cold quantity utilization efficiency and reduce the energy consumption of the cold storage.

[0009] In order to solve the above technical problems, the present application adopts the following technical scheme: A natural flow type cold storage temperature control air flow circulation control system comprises an air conditioner system installed at the upper end of the cold storage, the air conditioner system is connected with a controller, the controller is connected with temperature sensors respectively installed at the upper and lower ends of the shelf of the cold storage (the controller controls the air supply of the air conditioner system when the temperatures detected by the temperature sensors at the upper and lower ends are both greater than the refrigeration temperature, and controls the air conditioner system to be turned off when the temperatures are both less than the refrigeration temperature); and the system is characterized in that it further comprises a vertical air flow channel fixedly arranged in the space area on one side of the shelf of the cold storage along the vertical direction, the vertical air flow channel is provided with a heat preservation layer along the peripheral side wall, a wind port is arranged at each of the upper and lower ends of the side of the air flow channel facing the shelf, a valve and a valve opening and closing control device are arranged at the wind port, and the valve opening and closing control device is used for controlling the valve to be opened when the temperature at the upper part of the shelf is higher than the refrigeration temperature.

[0010] Thus, after the air conditioning system stops blowing, the vertical air flow channel maintains the internal temperature at a lower temperature range by the heat preservation layer. The cold air in the cold storage gradually sinks and the heat generated by the goods causes the formation of a cold lake phenomenon, forming a temperature environment with cold at the bottom and heat at the top. When the temperature at the upper part of the shelf rises above the refrigeration temperature, the valve opening and closing control device can control the opening of the valve of the air outlet. At this time, the air density is high at the bottom and low at the top in the cold storage; therefore, after the air outlets at the upper and lower ends of the vertical air flow channel are opened, the air outlet at the lower end will automatically intake air inward and the air outlet at the upper end will automatically exhaust air outward under the action of the indoor air pressure difference, so as to form air circulation until the air density at the upper and lower ends is balanced. Thus, the air flow circulation is realized by using the air density pressure difference until the balance, so that the uniformity of the temperature in the cold storage space is better improved, the cold energy utilization efficiency is improved, the re-starting time of the cold storage air conditioner is prolonged, the refrigeration effect of the goods is better improved, and the air conditioning energy consumption is better saved.

[0011] Further, the valve opening and closing control device comprises a force receiving piston cylinder fixedly installed on the shelf in the vertical direction, a force receiving piston slidably arranged in the middle of the force receiving piston cylinder and closed at the upper end, a phase change liquid encapsulated in the inner cavity above the force receiving piston, the gasification temperature of the phase change liquid matching (substantially consistent) with the upper limit of the refrigeration temperature, and a communication pipe further installed at the lower end of the force receiving piston cylinder, the communication pipe being in communication with a force applying piston cylinder fixedly installed at the lower end of the vertical air flow channel, a force applying piston slidably arranged in the force applying piston cylinder, a vertical connecting rod fixedly arranged at the upper end of the force applying piston and extending out of the force applying piston cylinder, and the vertical connecting rod being connected with the two valves through a horizontal connecting rod and being slidably arranged at the two air outlets.

[0012] Thus, when the upper part of the shelf of the cold storage starts to heat and is higher than the refrigeration temperature range, the phase change liquid encapsulated in the inner cavity above the force receiving piston is heated and gasified, and the generated gas pressure drives the force receiving piston to move downward, and then the gas pressure is transmitted to the force applying piston cylinder through the communication pipe and drives the force applying piston to move upward, and then the two valves are automatically opened through the vertical connecting rod and the horizontal connecting rod. Therefore, the temperature control opening effect of the two air outlets can be realized without additional power. At the same time, the height of the air outlet can also be adjusted according to the size of the temperature difference, which has a self-adaptive adjustment effect.

[0013] Further, the communication pipe, the force receiving piston cylinder and the force applying piston cylinder are encapsulated with hydraulic liquid at the lower end.

[0014] Thus, the hydraulic liquid can better transmit the pressure than the gas pressure, realize linkage control and ensure stability.

[0015] Further, a heat-conducting plate made of high-thermal-conductivity material is arranged, one end of the heat-conducting plate is installed at the upper end of the shelf, and the other end penetrates into and is installed in the airflow channel.

[0016] In this way, when the upper end of the shelf is heated, the heat-conducting plate can conduct the heat from the upper end of the shelf into the airflow channel, heat the gas in the airflow channel, and better promote the upward flow of the gas in the airflow channel, thereby improving the air flow regulation efficiency of the airflow channel.

[0017] In summary, the application can solve the cold lake phenomenon without additional energy input, avoid temperature imbalance to affect the preservation of goods, improve the cold energy utilization efficiency, and better reduce the energy consumption of the cold storage. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure of the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0019] The application will be further described in detail below in combination with specific embodiments and drawings.

[0020] Embodiment: a natural flow type cold storage temperature control air flow circulation control system, referring to Figure 1 , comprising an air conditioning system 11 installed at the upper end of the cold storage, the air conditioning system 11 is connected with a controller 12, the controller 12 is connected with temperature sensors 13 respectively installed at the upper and lower ends of the shelf of the cold storage (the controller controls the air conditioning system to blow air when the temperature detected by the temperature sensors at the upper and lower ends is greater than the refrigeration temperature, and controls the air conditioning system to be turned off when the temperature is less than the refrigeration temperature); further comprising a vertical airflow channel 14 fixedly arranged in the space area on one side of the shelf of the cold storage in the vertical direction, the vertical airflow channel is provided with a heat preservation layer along the four surrounding side walls, one air inlet 15 is arranged at the upper and lower ends of the side of the airflow channel facing the shelf, a valve 16 and a valve opening and closing control device are arranged at the air inlet, and the valve opening and closing control device is used to control the valve to be opened when the temperature at the upper part of the shelf is higher than the refrigeration temperature.

[0021] In this way, after the air conditioning system stops blowing, the vertical air flow channel maintains the internal temperature at a lower temperature range by the heat preservation layer. The cold air in the cold storage gradually sinks and the heat generated by the goods causes the formation of a cold lake phenomenon, forming a temperature environment with cold at the bottom and heat at the top. When the temperature at the upper part of the shelf rises above the refrigeration temperature, the valve opening and closing control device can control the opening of the valve of the air outlet. At this time, the cold air density is high at the bottom of the cold storage, and the hot air density is small at the top; therefore, after the air outlets at the upper and lower ends of the vertical air flow channel are opened, the air outlet at the lower end of the vertical air flow channel will automatically intake air inward, and the air outlet at the upper end will automatically exhaust air outward under the action of the indoor air pressure difference, so as to form an air flow circulation until the air density at the upper and lower ends is balanced. In this way, the air flow circulation is realized by utilizing the air density pressure difference until the balance, so that the uniformity of the temperature in the cold storage space is better improved without additional power, the cold energy utilization efficiency is improved, the cold storage air conditioner is restarted for a longer time, the refrigeration effect of the goods is better improved, and the air conditioning energy consumption is better saved. The refrigeration temperature in the implementation is 1-10℃.

[0022] The valve opening and closing control device comprises a force receiving piston cylinder 17 fixedly installed on the cold storage shelf in the vertical direction, a force receiving piston 18 slidably arranged in the middle of the force receiving piston cylinder 17 and designed to be closed at the upper end, a phase change liquid encapsulated in the inner cavity above the force receiving piston, the gasification temperature of the phase change liquid matching (substantially consistent) with the upper limit of the refrigeration temperature, and a communication pipe 19 further installed at the lower end of the force receiving piston cylinder 17, the communication pipe being in communication with a force applying piston cylinder 20 fixedly installed inside the vertical air flow channel, a force applying piston 21 slidably arranged in the force applying piston cylinder, a vertical connecting rod 22 fixedly arranged at the upper end of the force applying piston 21 and extending out of the force applying piston cylinder, and the vertical connecting rod 22 being connected with the valves 16 slidably arranged at the two air outlets through a horizontal connecting rod 23.

[0023] In this way, when the upper part of the cold storage shelf starts to heat and is higher than the refrigeration temperature range, the phase change liquid encapsulated in the inner cavity above the force receiving piston is heated and gasified, and the generated gas pressure will drive the force receiving piston to move downward, and then the gas pressure is transmitted to the force applying piston cylinder through the communication pipe and drives the force applying piston to move upward, and then the two valves are driven to move upward through the vertical connecting rod and the horizontal connecting rod to automatically open the two air outlets. Therefore, the temperature control opening effect of the two air outlets can be realized without additional power. At the same time, the height of the air outlet opening can also be adjusted according to the size of the temperature difference, which has a self-adaptive adjustment effect.

[0024] The communication pipe 19, the force receiving piston cylinder 17 and the force applying piston cylinder 20 are encapsulated with hydraulic liquid at the lower end.

[0025] In this way, the hydraulic liquid can better transmit the pressure than the gas pressure, realize linkage control and ensure stability.

[0026] The heat-conducting plate 24 made of high-heat-conducting material is arranged at one end of the heat-conducting plate 24 on the upper end of the shelf, and the other end is inserted into and arranged in the airflow channel.

[0027] In this way, when the upper end of the shelf is heated, the heat-conducting plate can guide the heat from the upper end of the shelf into the airflow channel, heat the gas in the airflow channel, and better promote the upward flow of the gas in the airflow channel, thereby improving the air flow regulation efficiency of the airflow channel.

Claims

1. A natural flow cold storage temperature control airflow circulation control system is implemented, including an air conditioning system installed at the upper end of the cold storage, the air conditioning system is connected to a controller, and the controller is connected to temperature sensors installed at the upper and lower ends of the cold storage shelves; characterized in that It also includes a vertical air flow channel fixed vertically in the space area on one side of the cold storage shelf. The vertical air flow channel is provided with an insulation layer along the four side walls. An air outlet is respectively opened at the upper and lower ends of the air flow channel facing the shelf. A valve and a valve opening and closing control device are provided at the air outlet. The valve opening and closing control device is used to control the valve to open when the temperature on the upper part of the shelf is higher than the refrigeration temperature.

2. The natural flow cold storage temperature-controlled air flow circulation control system as described in claim 1, wherein the valve opening and closing control device includes a force-bearing piston cylinder fixedly installed vertically on the cold storage shelf, a force-bearing piston that can slide up and down is provided in the middle position of the force-bearing piston cylinder and is closed at the upper end, a phase-change liquid is encapsulated in the inner cavity above the force-bearing piston, and the vaporization temperature of the phase-change liquid matches the upper limit of the refrigeration temperature, a connecting pipe is installed at the lower end of the force-bearing piston cylinder, the connecting pipe is connected to the lower end of a force-bearing piston cylinder fixedly installed inside the vertical air flow channel, a force-bearing piston is installed inside the force-bearing piston cylinder so as to slide up and down, and a vertical connecting rod extending from the force-bearing piston cylinder is fixedly provided upward on the upper end of the force-bearing piston, and the vertical connecting rod is connected to the valves that can slide up and down and are installed at the two air outlet positions through a transverse connecting rod.

3. The natural flow cold storage temperature control airflow circulation control system according to claim 2, characterized in that: Hydraulic liquid is encapsulated in the communicating tube and in the lower ends of the force-bearing piston cylinder and the force-applying piston cylinder.

4. The natural flow cold storage temperature control airflow circulation control system according to claim 1, characterized in that: A heat conducting plate made of a high heat conducting material is also provided. One end of the heat conducting plate is installed at the upper end of the shelf, and the other end penetrates into and is installed inside the air flow channel.

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