A frozen soil refrigeration system and a method of using the same

Abstract

The present invention relates to the technical field of frozen soil construction equipment, and discloses a frozen soil refrigeration system and a method for using the same, comprising an antifreeze water tank, a first refrigeration device and a U-shaped tube, wherein the first refrigeration device comprises a first evaporator, the first evaporator is connected to the antifreeze water tank through a pipeline, and the antifreeze water tank is connected to the U-shaped tube; wherein a coil is installed inside the antifreeze water tank. The frozen soil refrigeration system and the method for using the same, by arranging a frozen soil temperature sensor and a frozen soil pressure sensor in the soil to be frozen, people can always understand the freezing condition of the soil through the frozen soil temperature sensor and the frozen soil temperature sensor, and decide to add or reduce the number of refrigeration equipment operations, thereby ensuring that the refrigeration equipment can output sufficient and appropriate cold to the soil source.

Description

Technical Field

[0001] The invention relates to the technical field of frozen soil construction equipment, and in particular to a frozen soil refrigeration system and a use method thereof. Background Art

[0002] When constructing some areas, frozen soil construction is usually used. Frozen soil construction has the following advantages:

[0003] Water-sealing property: It can freeze into soil, forming a frozen soil wall to increase the bearing pressure of the soil layer. The frozen soil wall can block the intrusion of groundwater and form a safe construction environment;

[0004] Strong adaptability: suitable for places with high water content and soft strata. At the same time, the soil layer will return to its original state after the construction is completed, with little damage to the soil layer;

[0005] Strong practicability: It can be constructed in densely built-up areas and under existing engineering buildings without the need for foundation pit drainage, which can avoid adverse effects on surrounding buildings caused by foundation settlement due to pumping;

[0006] Convenient construction: There is no need for supporting lining or anchoring during construction, so open construction can be carried out to expand the building area and shorten the construction period.

[0007] During frozen soil construction, it is usually necessary to artificially create frozen soil to promote a frozen soil construction environment. The existing method of preparing frozen soil is to use a single refrigeration device to output cold energy to the soil, thereby freezing the construction ground. However, the existing refrigeration equipment has limited cold energy input and low refrigeration efficiency. It is also difficult for people to adjust the cold energy output of the refrigeration equipment to the soil according to the specific freezing conditions of the soil, which causes inconvenience in the use of existing refrigeration equipment. Summary of the invention

[0008] The present invention provides a frozen soil refrigeration system and a method for using the same, which has the advantages that the refrigeration equipment can output sufficient cold capacity and people can adjust the cold capacity output by the refrigeration equipment to the soil according to the specific freezing conditions of the soil, thereby solving the problems mentioned in the above background technology.

[0009] The present invention provides the following technical solutions:

[0010] A frozen soil refrigeration system comprises an antifreeze water tank, a first refrigeration device and a U-shaped pipe.

[0011] Wherein, the first refrigeration equipment includes a first evaporator, the first evaporator is connected to the antifreeze water tank through a pipeline, and the antifreeze water tank is connected to the U-shaped tube.

[0012] A coil is installed inside the antifreeze water tank.

[0013] The first refrigeration equipment also includes a first compressor, a first condenser and a first throttle valve. The first compressor is connected to the first condenser through a pipeline, the first condenser is connected to the first throttle valve through a pipeline, the first throttle valve is connected to the first evaporator through a pipeline, and the first evaporator is connected to the first compressor through a pipeline.

[0014] The water outlet of the first evaporator is connected to the first refrigeration pump through a pipeline, the water outlet of the first refrigeration pump is connected to the water inlet of the antifreeze water tank through a pipeline, and the water outlet of the antifreeze water tank is connected to the water inlet of the first evaporator through a pipeline.

[0015] Wherein, a second temperature sensor and a second pressure sensor are also arranged inside the first evaporator.

[0016] The water outlet of the first condenser is connected to a cooling tower through a pipeline, the water outlet of the cooling tower is connected to a cooling pump through a pipeline, and the water outlet of the cooling pump is connected to the water inlet of the first condenser through a pipeline.

[0017] Wherein, the cooling tower is also connected to a tower water pump through a pipeline.

[0018] A first temperature sensor and a first pressure sensor are also disposed inside the first condenser.

[0019] The antifreeze water tank is connected to a frozen soil freezing pump through a pipeline, the frozen soil freezing pump is connected to a water collector through a pipeline, the water collector is connected to the water outlet of the U-shaped tube through a PID regulating valve, the water inlet of the U-shaped tube is connected to a water distributor through a pipeline, and the water distributor is connected to the antifreeze water tank through a pipeline.

[0020] Wherein, a frozen soil temperature sensor and a frozen soil pressure sensor are also arranged in the soil layer where the U-shaped tube is located.

[0021] The frozen soil refrigeration system also includes a liquid level sensor, an antifreeze concentration sensor and a tank water pump.

[0022] Wherein, the liquid level sensor and the antifreeze concentration sensor are arranged inside the antifreeze water tank.

[0023] The tank water pump is connected to the antifreeze water tank through a pipeline.

[0024] The frozen soil refrigeration system also includes a mobile terminal, which is a mobile phone, a cloud or an LED display screen.

[0025] Preferably, one end of the coil is connected to a second compressor, the second compressor is connected to a second condenser through a pipeline, the second condenser is connected to a second throttle valve through a pipeline, and the second throttle valve is connected to the other end of the coil.

[0026] Wherein, the second condenser is also connected to an air energy radiator.

[0027] Preferably, the first refrigeration equipment, frozen soil temperature sensor, frozen soil pressure sensor, first freezing pump, cooling pump, cooling tower, tower water pump, first temperature sensor, first pressure sensor, second temperature sensor, second pressure sensor, frozen soil freezing pump, PID regulating valve, second compressor, second condenser, second throttle valve, air energy radiator, liquid level sensor, antifreeze concentration sensor and tank water pump are all communicatively connected to the main control box.

[0028] Preferably, the method comprises the following specific steps:

[0029] S1: Use liquid nitrogen to pre-cool the U-tube in the soil;

[0030] S2: Detect the liquid level and antifreeze concentration inside the antifreeze tank through the liquid level sensor and the antifreeze concentration sensor, then add antifreeze into the antifreeze tank and increase or decrease the amount of water into the antifreeze tank through the tank water pump to adjust the liquid level and antifreeze content inside the antifreeze tank to reach the standard value;

[0031] S3: Turn on the main control box to detect the soil temperature through the frozen soil temperature sensor;

[0032] S4: If the temperature is greater than 0°C, first start the tower water pump, then start the cooling pump, start the cooling tower, and cool the first condenser in the first refrigeration device in the working process through the cooling tower;

[0033] S41: Detect the outlet water temperature of the first condenser through a temperature sensor, and if it is greater than 35° C., turn on the fan in the cooling tower;

[0034] S5: Turn on the first refrigeration device and the frozen soil freezing pump. The first refrigeration device performs heat exchange with the liquid in the antifreeze water tank through the first freezing pump and outputs the cold energy to the liquid in the antifreeze water tank. Then the frozen soil freezing pump inputs the low-temperature liquid in the antifreeze water tank into the U-shaped tube and performs heat exchange with the soil through the U-shaped tube.

[0035] S6: Test the freezing pressure of the soil through the frozen soil pressure sensor. If the pressure is small, turn on the second compressor, the second condenser, the second throttle valve, and the coil. The second compressor, the second condenser, the second throttle valve and the coil cooperate with each other to cool the coil, thereby increasing the cooling capacity of the antifreeze tank and improving the freezing rate of the soil. When the frozen soil has been completely frozen but the temperature in the soil is still dropping, first turn off the tower water pump, then turn off the refrigeration equipment, and finally turn off the main control box.

[0036] Preferably, the mobile terminal is communicatively connected to the master control box.

[0037] The present invention has the following beneficial effects:

[0038] 1. The frozen soil refrigeration system and its use method, by setting a frozen soil temperature sensor and a frozen soil pressure sensor in the soil to be frozen, people can always understand the freezing condition of the soil through the frozen soil temperature sensor and the frozen soil temperature sensor, and decide to add or reduce the number of refrigeration equipment to work, so as to ensure that the refrigeration equipment can output sufficient and appropriate amount of cold to the soil source.

[0039] 2. The frozen soil refrigeration system and its use method, by arranging a liquid level sensor and an antifreeze concentration sensor in the antifreeze water tank, people can detect the antifreeze concentration and liquid level height in the antifreeze water tank according to the antifreeze concentration sensor and the liquid level sensor, thereby facilitating adding antifreeze into the antifreeze water tank and / or increasing or decreasing the amount of water in the antifreeze water tank through a tank water pump to adjust the liquid level and antifreeze content in the antifreeze water tank to reach the standard value.

[0040] 3. By arranging the first temperature sensor and the first pressure sensor inside the first condenser, the first temperature sensor can always feedback the water temperature in the first condenser. When the water temperature is too high, people can start the fan in the cooling tower in time through the control box to dissipate the heat of the first condenser, thereby facilitating more efficient cooling work of the first condenser. The first pressure sensor reflects the pressure condition inside the first condenser, facilitating safer operation of the first condenser.

[0041] 4. By arranging a second temperature sensor and a second pressure sensor inside the first evaporator, the second temperature sensor can always feedback the water temperature in the first evaporator. When the water temperature is too high, it is convenient for people to start the first condenser in the first refrigeration equipment in time for heat exchange through the control box. The first pressure sensor reflects the pressure condition inside the first evaporator, which facilitates the first evaporator to work more safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the structure of the present invention;

[0043] Figure 2It is a schematic diagram of communication connection of various electrical appliances in the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] During frozen soil construction, it is usually necessary to artificially create frozen soil to promote a frozen soil construction environment. The existing method of preparing frozen soil is to use a single refrigeration device to output cold energy to the soil, thereby freezing the construction ground. However, the existing refrigeration equipment has limited cold energy input and low refrigeration efficiency. It is also difficult for people to adjust the cold energy output of the refrigeration equipment to the soil according to the specific freezing conditions of the soil, which causes inconvenience in the use of the existing refrigeration equipment. The present invention provides the following embodiments to solve the above problems.

[0046] Example 1

[0047] See also Figure 1-2 A frozen soil refrigeration system comprises an antifreeze water tank, a first refrigeration device, a second refrigeration device and a U-shaped tube, wherein the first refrigeration device comprises a first evaporator, the first evaporator is connected to the antifreeze water tank through a pipeline, and the antifreeze water tank is connected to the U-shaped tube; wherein the second refrigeration device comprises a coil, a second compressor, a second condenser and a second throttle valve, and the coil is installed inside the antifreeze water tank. It should be noted that the liquid inside the antifreeze water tank can be an ethylene glycol solution or a brine solution, wherein brine has low cost but is easily corrosive. People can choose antifreeze, ethylene glycol or brine according to their needs, and the U-shaped tube is buried under the ground level that needs to be frozen.

[0048] Preferably, the first refrigeration equipment also includes a first compressor, a first condenser and a first throttle valve, the first compressor is connected to the first condenser through a pipeline, the first condenser is connected to the first throttle valve through a pipeline, the first throttle valve is connected to the first evaporator through a pipeline, and the first evaporator is connected to the first compressor through a pipeline.

[0049] The water outlet of the first evaporator is connected to the first refrigeration pump through a pipeline, and the water outlet of the first refrigeration pump is connected to the water inlet of the antifreeze water tank through a pipeline, and the water outlet of the antifreeze water tank is connected to the water inlet of the first evaporator through a pipeline, wherein a second temperature sensor and a second pressure sensor are also arranged inside the first evaporator, and the first refrigeration pump is used to transport the cold generated by the first evaporator to the antifreeze water tank.

[0050] It should be noted that when the first refrigeration equipment is working, the refrigerant in the first evaporator absorbs the heat in the antifreeze water tank and evaporates into a vapor with lower pressure and temperature. After being sucked in and compressed by the first compressor, the pressure and temperature of the refrigerant increase, and then it is discharged into the first condenser. The refrigerant vapor condenses into a liquid with higher pressure by releasing heat in the first condenser, and then the refrigerant liquid passes through the throttling of the first throttle valve, and its pressure and temperature are reduced and enters the first evaporator again to evaporate, and the cycle is repeated over and over again, thereby achieving the purpose of lowering the temperature of the liquid in the antifreeze water tank.

[0051] The water outlet of the first condenser is connected to a cooling tower through a pipeline, the water outlet of the cooling tower is connected to a cooling pump through a pipeline, and the water outlet of the cooling pump is connected to the water inlet of the first condenser through a pipeline; wherein, the cooling tower is also connected to a tower water pump through a pipeline; wherein, a first temperature sensor and a first pressure sensor are also arranged inside the first condenser.

[0052] The first temperature sensor can always feedback the water temperature in the condenser. When the water temperature is too high, people can start the fan in the cooling tower in time through the control box to dissipate the heat of the first condenser. The cooling tower uses water as a circulating coolant to absorb heat from the first condenser and discharge it into the atmosphere to reduce the temperature of the refrigerant in the first condenser. Its refrigeration principle is to use water and air flow to exchange heat and generate steam. The steam evaporates and takes away the heat to achieve evaporative heat dissipation, convection heat transfer and radiation heat transfer to dissipate the heat of the first condenser to ensure the normal operation of the first condenser and the first refrigeration equipment. The tower water pump can replenish the missing water in the cooling tower in time. The first pressure sensor reflects the internal pressure of the first condenser to facilitate its safer operation.

[0053] Advantageously, one end of the coil is connected to a second compressor, the second compressor is connected to a second condenser through a pipeline, the second condenser is connected to a second throttle valve through a pipeline, the second throttle valve is connected to the other end of the coil, wherein the second condenser is also connected to an air energy radiator, the second condenser is cooled by wind energy through the air energy radiator, and heat is exchanged with the coil.

[0054] When the second refrigeration equipment is working, the refrigerant in the coil absorbs the heat in the antifreeze water tank and evaporates to become the saturated pressure and vapor of the refrigerant. After being sucked and compressed by the second compressor, the pressure and temperature of the refrigerant increase (the refrigerant becomes saturated with high temperature and high pressure), and then it is discharged into the second condenser. The refrigerant vapor condenses into a liquid with higher pressure by releasing heat in the second condenser, and then the refrigerant liquid passes through the throttling effect of the second throttle valve, and its pressure and temperature are reduced and enters the coil again to evaporate, and the cycle is repeated over and over again, thereby achieving the purpose of lowering the temperature of the liquid in the antifreeze water tank.

[0055] When freezing the soil, if the cooling capacity generated by the first refrigeration device is insufficient, the second refrigeration device can be started to increase the cooling capacity inside the antifreeze tank, thereby improving the efficiency of freezing the soil.

[0056] The antifreeze water tank is connected to a frozen soil freezing pump through a pipeline. The frozen soil freezing pump is used to transport the freezing liquid in the antifreeze water tank to the U-shaped tube, thereby cooling the U-shaped tube and freezing the soil. The frozen soil freezing pump is connected to a water collector through a pipeline. The water collector is connected to the water outlet of the U-shaped tube through a PID regulating valve. The water inlet of the U-shaped tube is connected to a water distributor through a pipeline. The water distributor is connected to the antifreeze water tank through a pipeline. A frozen soil temperature sensor and a frozen soil pressure sensor are also provided in the soil layer where the U-shaped tube is located.

[0057] The PID regulating valve is convenient for people to control it through the control box, and then control the amount of liquid flow inside it. The frozen soil temperature sensor is used to detect the temperature inside the soil. The frozen soil pressure sensor can detect the freezing effect of the soil when it is frozen according to the pressure generated by the freezing and expansion of the soil. The two are used in conjunction with each other to facilitate the staff to always understand the temperature conditions of the frozen soil layer, and then people can adjust the opening state of the first refrigeration device and the second refrigeration device according to the feedback from the two sensors. For example, when the temperature inside the soil is high and the expansion pressure inside the soil is small, people can turn on the first refrigeration device and the second refrigeration device at the same time. When the temperature inside the soil is low and the expansion pressure inside the soil is large, people can appropriately reduce the number of refrigeration devices working, and can only use the first refrigeration device or the second wet cooling device. If the soil freezing effect meets the requirements, people can stop the first refrigeration device and the second refrigeration device in time to achieve the purpose of energy saving.

[0058] It should also be noted that it also includes a liquid level sensor, an antifreeze concentration sensor and a tank water pump, wherein the liquid level sensor and the antifreeze concentration sensor are arranged inside the antifreeze water tank; wherein the tank water pump is connected to the antifreeze water tank through a pipeline.

[0059] By arranging a liquid level sensor and an antifreeze concentration sensor in the antifreeze water tank, people can detect the antifreeze concentration and liquid level height in the antifreeze water tank according to the antifreeze concentration sensor and the liquid level sensor, thereby facilitating adding antifreeze into the antifreeze water tank and / or increasing or decreasing the amount of water into the antifreeze water tank through a tank water pump to adjust the liquid level and antifreeze content inside the antifreeze water tank to reach the standard value.

[0060] Preferably, the first refrigeration equipment, frozen soil temperature sensor, frozen soil pressure sensor, first freezing pump, cooling pump, cooling tower, tower water pump, first temperature sensor, first pressure sensor, second temperature sensor, second pressure sensor, frozen soil freezing pump, PID regulating valve, second compressor, second condenser, second throttle valve, air energy radiator, liquid level sensor, antifreeze concentration sensor and tank water pump are all communicatively connected to the main control box.

[0061] This refrigeration system includes the following specific operating steps:

[0062] S1: Use liquid nitrogen to pre-cool the U-tube in the soil;

[0063] S2: Detect the liquid level and antifreeze concentration inside the antifreeze tank through the liquid level sensor and the antifreeze concentration sensor, then add antifreeze into the antifreeze tank and increase or decrease the amount of water into the antifreeze tank through the tank water pump to adjust the liquid level and antifreeze content inside the antifreeze tank to reach the standard value;

[0064] S3: Turn on the main control box to detect the soil temperature through the frozen soil temperature sensor;

[0065] S4: If the temperature is greater than 0°C, first start the tower water pump, then start the cooling pump, start the cooling tower, and cool the first condenser in the first refrigeration device in the working process through the cooling tower;

[0066] S41: Detect the outlet water temperature of the first condenser through a temperature sensor, and if it is greater than 35° C., turn on the fan in the cooling tower;

[0067] S5: Turn on the first refrigeration device and the frozen soil freezing pump. The first refrigeration device performs heat exchange with the liquid in the antifreeze water tank through the first freezing pump and outputs the cold energy to the liquid in the antifreeze water tank. Then the frozen soil freezing pump inputs the low-temperature liquid in the antifreeze water tank into the U-shaped tube and performs heat exchange with the soil through the U-shaped tube.

[0068] S6: Test the freezing pressure of the soil through the frozen soil pressure sensor. If the pressure is small, turn on the second compressor, the second condenser, the second throttle valve, and the coil. The second compressor, the second condenser, the second throttle valve and the coil cooperate with each other to cool the coil, thereby increasing the cooling capacity of the antifreeze tank and improving the freezing rate of the soil. When the frozen soil has been completely frozen but the temperature in the soil is still dropping, first turn off the tower water pump, then turn off the refrigeration equipment, and finally turn off the control box.

[0069] This embodiment also includes a mobile terminal, which is communicatively connected to the control box. The mobile terminal can be a mobile phone, a cloud or an LED display screen. People can control the first refrigeration equipment, the frozen soil temperature sensor, the frozen soil pressure sensor, the first freezing pump, the cooling pump, the cooling tower, the tower water pump, the temperature sensor, the pressure sensor, the frozen soil freezing pump, the PID regulating valve, the second compressor, the second condenser, the second throttle valve, the liquid level sensor, the antifreeze concentration sensor and the tank water pump and other equipment through the communication between these mobile terminals and the control box to control the operation of the entire refrigeration system.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A frozen soil refrigeration system, characterized in that: Including antifreeze water tank, first refrigeration equipment and U-shaped pipe, Wherein, the first refrigeration equipment includes a first evaporator, the first evaporator is connected to the antifreeze water tank through a pipeline, and the antifreeze water tank is connected to the U-shaped tube; A coil is installed inside the antifreeze water tank; The first refrigeration device further includes a first compressor, a first condenser and a first throttle valve, the first compressor is connected to the first condenser through a pipeline, the first condenser is connected to the first throttle valve through a pipeline, the first throttle valve is connected to the first evaporator through a pipeline, and the first evaporator is connected to the first compressor through a pipeline; The water outlet of the first evaporator is connected to the first freezing pump through a pipeline, the water outlet of the first freezing pump is connected to the water inlet of the antifreeze water tank through a pipeline, and the water outlet of the antifreeze water tank is connected to the water inlet of the first evaporator through a pipeline; Wherein, a second temperature sensor and a second pressure sensor are also arranged inside the first evaporator; The water outlet of the first condenser is connected to a cooling tower through a pipeline, the water outlet of the cooling tower is connected to a cooling pump through a pipeline, and the water outlet of the cooling pump is connected to the water inlet of the first condenser through a pipeline; Wherein, the cooling tower is also connected to a tower water pump through a pipeline; A first temperature sensor and a first pressure sensor are also provided inside the first condenser; The antifreeze water tank is connected to a frozen soil freezing pump through a pipeline, the frozen soil freezing pump is connected to a water collector through a pipeline, the water collector is connected to the water outlet of the U-shaped tube through a PID regulating valve, the water inlet of the U-shaped tube is connected to a water distributor through a pipeline, and the water distributor is connected to the antifreeze water tank through a pipeline; Wherein, a frozen soil temperature sensor and a frozen soil pressure sensor are also provided in the soil layer where the U-shaped tube is located; The frozen soil refrigeration system also includes a liquid level sensor, an antifreeze concentration sensor and a tank water pump. Wherein, the liquid level sensor and the antifreeze concentration sensor are arranged inside the antifreeze water tank; The tank water pump is connected to the antifreeze water tank through a pipeline; The frozen soil refrigeration system also includes a mobile terminal, which is a mobile phone, a cloud or an LED display screen.

2. The frozen soil refrigeration system according to claim 1, characterized in that: One end of the coil is connected to a second compressor, the second compressor is connected to a second condenser through a pipeline, the second condenser is connected to a second throttle valve through a pipeline, and the second throttle valve is connected to the other end of the coil; Wherein, the second condenser is also connected to an air energy radiator.

3. The frozen soil refrigeration system according to claim 1, characterized in that: The first refrigeration equipment, frozen soil temperature sensor, frozen soil pressure sensor, first freezing pump, cooling pump, cooling tower, tower water pump, first temperature sensor, first pressure sensor, second temperature sensor, second pressure sensor, frozen soil freezing pump, PID regulating valve, second compressor, second condenser, second throttle valve, air energy radiator, liquid level sensor, antifreeze concentration sensor and tank water pump are all communicatively connected to the main control box.

4. A refrigeration method using the frozen soil refrigeration system of claim 3, characterized in that: The specific steps are as follows: S1: Use liquid nitrogen to pre-cool the U-tube in the soil; S2: Detect the liquid level and antifreeze concentration inside the antifreeze tank through the liquid level sensor and the antifreeze concentration sensor, then add antifreeze into the antifreeze tank and increase or decrease the amount of water into the antifreeze tank through the tank water pump to adjust the liquid level and antifreeze content inside the antifreeze tank to reach the standard value; S3: Turn on the main control box to detect the soil temperature through the frozen soil temperature sensor; S4: If the temperature is greater than 0°C, first start the tower water pump, then start the cooling pump, start the cooling tower, and cool the first condenser in the first refrigeration device in the working process through the cooling tower; S41: Detect the outlet water temperature of the first condenser through a temperature sensor, and if it is greater than 35° C., turn on the fan in the cooling tower; S5: Turn on the first refrigeration device and the frozen soil freezing pump. The first refrigeration device performs heat exchange with the liquid in the antifreeze water tank through the first freezing pump and outputs the cold energy to the liquid in the antifreeze water tank. Then the frozen soil freezing pump inputs the low-temperature liquid in the antifreeze water tank into the U-shaped tube and performs heat exchange with the soil through the U-shaped tube. S6: Test the freezing pressure of the soil through the frozen soil pressure sensor. If the pressure is small, turn on the second compressor, the second condenser, the second throttle valve, and the coil. The second compressor, the second condenser, the second throttle valve and the coil cooperate with each other to cool the coil, thereby increasing the cooling capacity of the antifreeze tank and improving the freezing rate of the soil. When the frozen soil has been completely frozen but the temperature in the soil is still dropping, first turn off the tower water pump, then turn off the refrigeration equipment, and finally turn off the main control box.

5. The refrigeration method of the frozen soil refrigeration system according to claim 4, characterized in that: The mobile terminal is communicatively connected with the master control box.

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