An integrated household air conditioner device and method based on tetrahydrofuran hydrate technology

Abstract

The present invention provides an integrated household air-conditioning device and method based on tetrahydrofuran hydrate technology. The conventional refrigerant can separately provide cooling capacity for the user end as a supplement to the cooling mode of the air-conditioning device, and at the same time provide low-temperature conditions for the formation of tetrahydrofuran hydrate; the tetrahydrofuran-water mixture absorbs cooling capacity in the tetrahydrofuran hydrate cold storage pool to generate hydrate ice slurry to store the cooling capacity. The circulating pump is started to transport the prepared ice slurry to the user end. The ice slurry melts and decomposes after absorbing heat from the air at the evaporator and flows back to the liquid storage tank. The whole process realizes the utilization of the energy dissipation during the phase change process of tetrahydrofuran hydrate; by adjusting the cooling capacity of the conventional refrigerant through the control system, the combined cooling of the tetrahydrofuran hydrate slurry cold storage pool and the refrigerator, as well as the alternating continuous cold storage and cooling of the tetrahydrofuran hydrate slurry can be realized, meeting the cooling demands at different times of the whole day, increasing the energy-saving benefit and reducing the air-conditioning cost.

Description

Technical Field

[0001] The present invention belongs to the technical application field of hydrates, and particularly relates to an integrated household air conditioner device and method based on tetrahydrofuran hydrate technology. Background Art

[0002] Tetrahydrofuran hydrate is a cold storage hydrate with excellent refrigeration performance. Different from ice cold storage, the cold storage temperature of ice is low, which leads to the decline of the efficiency of the refrigeration unit. While tetrahydrofuran hydrate can crystallize and solidify at 4.4°C above the freezing point under normal pressure conditions, and tetrahydrofuran can dissolve with water. Compared with other types of hydrates, it has a short induction period, a small degree of supercooling, and a fast growth rate. By setting the initial concentration of the tetrahydrofuran aqueous solution, the continuous generation and transfer of the slurry can be realized, and continuous flow can be achieved without blocking the pipelines and equipment on the premise of ensuring sufficient hydrate generation. The decomposition heat of tetrahydrofuran hydrate is 270 kJ / kg, which is completely suitable as a cold storage working medium for air conditioners. Utilizing the latent heat of vaporization during the phase change can meet the cooling demand at the user end.

[0003] An integrated air conditioner is a complete machine device that installs condensers, evaporators, compressors, expansion valves, pipelines, and all other system components in the chassis. This type of air conditioner is relatively small in volume, low in price, and convenient for mobile installation, and is usually applied to small places such as rooms, vehicles, and enclosed machine rooms. However, in hot summer weather, the electricity consumption of air conditioners overlaps with the peak period of urban electricity consumption. Due to its own structural characteristics, it causes problems such as large electricity consumption load during the day, serious peak exceeding, and unbalanced peak-valley electricity consumption, reducing the energy utilization efficiency.

[0004] The application of tetrahydrofuran hydrate cold storage technology solves the problem. The integrated air conditioner device generates tetrahydrofuran hydrate to store cold energy during the low electricity consumption period with low electricity prices, and decomposes tetrahydrofuran hydrate to release cold energy during the high electricity consumption period with high electricity prices, achieving the purpose of "shifting the peak and filling the valley". Summary of the Invention

[0005] Based on the above problems, the present invention utilizes the energy change during the generation and decomposition processes of tetrahydrofuran hydrate ice slurry, combines with the conventional refrigerant refrigeration technology, provides cold energy for the tetrahydrofuran hydrate slurry cold storage pool, realizes the goal of energy storage, and designs five working states to cope with the problem of mismatching between cold energy supply and demand, and provides an integrated household air conditioner device and method based on tetrahydrofuran hydrate technology.

[0006] The technical solution of the present invention:

[0007] An integrated household air conditioning device and method based on tetrahydrofuran hydrate technology, comprising a refrigerator 1, a control system 2, an evaporator, a fan, a hydrate cold storage tank 5, a tetrahydrofuran hydrate reaction tank, a motor 6, a circulation pump 7, a heating coil 10, a heat insulation cover 11, a liquid storage tank 12, a three-way valve 13, a valve, a flow controller 19, an ice crusher, a displacement sensor 25 and a liquid level sensor 26;

[0008] The main body of the device is a rectangular hydrate cold storage tank 5. Two symmetrical reaction tanks are vertically installed at the bottom of the hydrate cold storage tank 5, which are the first tetrahydrofuran hydrate reaction tank 5a and the second tetrahydrofuran hydrate reaction tank 5b. The height of the reaction tank is less than the height of the hydrate cold storage tank 5. The inner cavity formed by the outer wall of the reaction tank and the inner wall of the hydrate cold storage tank 5 is used as a refrigerant flow channel. The inner cavity has a hole at the top and bottom, which are the refrigerant outflow port and the injection port respectively. The internal structure of the two reaction tanks is the same. A displacement sensor 25 is installed at a position of 0.95H in the inner wall of the reaction tank. The calculation formula of H is:

[0009]

[0010] Where H is the volume V s1 The maximum vertical height that the solid hydrate can grow and expand to from the initial mixed liquid, m; V s3 is the volume of the generated solid hydrate; S is the bottom area of ​​the reaction tank, m 2 According to the characteristics of tetrahydrofuran and the hydrate formation mechanism, the formula for calculating the initial injection amount and the supplementary injection amount of the tetrahydrofuran-water mixture in a single cycle is:

[0011]

[0012] V s2 =VV s1 (3)

[0013] V s3 =fV(4)

[0014] Among them, V s1 is the initial injection volume of the mixed liquid, m 3 ; V s2 is the amount of mixed liquid replenishment injection, m 3 ; V is the volume of the reaction tank, m 3 ; f is the volume fraction of the generated solid hydrate in the system, %, and the value of f should be controlled within 70%; 1.25 is the expansion coefficient, and the volume expands to 1.25 times the original after 1 mol of water is converted into hydrate;

[0015] A liquid level sensor 26 is installed at the bottommost part of the inner wall of the reaction tank; two ice crushers are installed equidistantly on both sides of the center of the bottom of the reaction tank; there are openings at the upper and lower parts of the reaction tank, which are the mixed liquid injection port and the hydrate slurry flow outlet respectively;

[0016] A refrigerator 1 and a control system 2 are assembled on the left side of the hydrate cold storage pool 5; a liquid storage tank 12 is assembled on the right side of the hydrate cold storage pool 5, and the liquid storage tank 12 is used to store the water-tetrahydrofuran mixed liquid to prevent the regenerated mixed liquid from flowing into the reaction tank during the non-ice slurry preparation stage; a first circulation pump 7 is assembled below the liquid storage tank 12; at the rightmost part of the device is the external working end, and two evaporators are arranged in alignment up and down, and a fan is installed on the left side of each evaporator;

[0017] The device has four lines, including a refrigerant flow line, a mixed liquid flow line, a hydrate slurry flow line, and a sensing control circuit;

[0018] Refrigerant flow line: The outlet of the refrigerator 1 passes through the first valve 14 and the three-way valve 13 and then is divided into two branches. One branch passes through the second valve 15 and is connected to the inlet end of the first evaporator 3, and the outlet end of the first evaporator 3 is connected to the refrigerator 1; the other branch passes through the third valve 16 and is connected to the refrigerant inlet at the bottom of the hydrate cold storage pool 5, and the refrigerant outlet passes through the fourth valve 17 and flows back to the refrigerator 1;

[0019] Mixed liquid flow line: The water-tetrahydrofuran mixed liquid is stored in the liquid storage tank 12. There are openings at the upper and lower parts of the liquid storage tank 12, which are the water-tetrahydrofuran mixed liquid flow outlet and the injection port respectively. The upper outlet passes through the second circulation pump 18 and the flow controller 19 and then is divided into two branches. One branch passes through the seventh valve 20 and is connected to the first tetrahydrofuran hydrate reaction tank 5a; the other branch passes through the eighth valve 21 and is connected to the second tetrahydrofuran hydrate reaction tank 5b, and the lower injection port is connected to the outlet of the heating coil 10;

[0020] Hydrate slurry flow line: The generated hydrate slurry is released from the hydrate slurry flow outlet at the bottom of the reaction tank, passes through the ninth valve 22 and the tenth valve 23 respectively, then converges into a pipeline, passes through the first circulation pump 7, and is connected to the inlet end of the second evaporator 8. The outlet of the second evaporator 8 is connected to the inlet of the heating coil 10, and the hydrate slurry is finally completely melted and decomposed in the heating coil;

[0021] Sensing control circuit: The flow controller 19, displacement sensor, liquid level sensor, first circulation pump 7, and refrigerator 1 are all connected to the control system 2 by signal lines. The control system 2 receives and feedbacks the sensor signals, and its signals are used as the front-end information for other actions; controls the compressor in the refrigerator 1 to adjust the cooling capacity of the conventional refrigerant; controls the flow controller 19 to adjust the injection amount of the water-tetrahydrofuran mixed liquid; controls the first circulation pump 7 to adjust the ice slurry flow rate at the user end.

[0022] Advantages of the present invention: The present invention provides an integrated household air conditioner device and method based on tetrahydrofuran hydrate technology, achieving the goal of shifting peak and filling valley to reduce the operation cost of the air conditioner. The hydrate cold storage is carried out using the low valley electricity at night, making full use of the energy change during the formation and decomposition of tetrahydrofuran hydrate, providing a feasible method for the design of small integrated air conditioners, and also having important significance for the subsequent research on the application of hydrates. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of an integrated household air conditioner device and method based on tetrahydrofuran hydrate technology.

[0024] Figure 2 It is a schematic diagram of the heat utilization of the circulation pump of the integrated household air conditioner device based on tetrahydrofuran hydrate technology.

[0025] In the figure: 1 chiller; 2 control system; 3 first evaporator; 4 first fan; 5 hydrate cold storage tank; 5a first tetrahydrofuran hydrate reaction tank; 5b second tetrahydrofuran hydrate reaction tank; 6 motor; 7 first circulation pump; 8 second evaporator; 9 second fan; 10 heating coil; 11 heat insulation cover; 12 liquid storage tank; 13 three-way valve; 14 first valve; 15 second valve; 16 third valve; 17 fourth valve; 18 second circulation pump; 19 flow controller; 20 seventh valve, 21 eighth valve, 22 ninth valve, 23 tenth valve, 24a first ice crusher, 24b second ice crusher, 24c third ice crusher, 24d fourth ice crusher, 25a first displacement sensor; 25b second displacement sensor; 26a first liquid level sensor; 26b second liquid level sensor. Detailed Embodiment

[0026] The following details the specific embodiments of the present invention in combination with the technical solutions and drawings.

[0027] The integrated household air conditioner device and method based on tetrahydrofuran hydrate technology include five working states: the chiller cools the tetrahydrofuran hydrate slurry cold storage tank, the tetrahydrofuran hydrate slurry releases cold, the chiller releases cold, the tetrahydrofuran hydrate slurry cold storage tank and the chiller jointly release cold, and the tetrahydrofuran hydrate slurry alternately and continuously stores and releases cold.

[0028] Operating state 1, the refrigeration machine 1 is in the working state of supplying cold to the hydrate slurry cold storage tank 5: Open the first valve 14, the third valve 16, and the fourth valve 17, and close other valves; Before the refrigeration machine 1 works, inject a tetrahydrofuran-water mixture into the reaction tank in advance, start the refrigeration machine 1, and adjust the refrigerating capacity of the conventional refrigerant through the control system 2. Compared with ice storage by making ice with water, the temperature required for the hydrate slurry cold storage process of tetrahydrofuran is higher and the refrigerating capacity of the conventional refrigerant is less; The conventional gaseous refrigerant is compressed, condensed, throttled and expanded in the refrigeration machine 1 to form a low-temperature and low-pressure liquid working medium, which flows into the hydrate cold storage tank 5 to complete the cold release process; The gaseous working medium flows back into the refrigeration machine 1 and is recompressed into a high-temperature and high-pressure gas; When the reaction tank is filled with stable tetrahydrofuran hydrate ice slurry, the cold storage process ends.

[0029] Operating state 2, the cold release working state of the tetrahydrofuran hydrate slurry: Open the ninth valve 22 and the tenth valve 23, and close other valves; Start the first circulation pump 7 and the second fan 9; Under the suction of the first circulation pump 7, the tetrahydrofuran hydrate slurry flows into the coil in the second evaporator 8. After the tetrahydrofuran hydrate slurry decomposes by absorbing the heat in the air at the user end, it flows out from the outlet of the second evaporator 8 and enters the heating coil 10. The solid-liquid mixture of the tetrahydrofuran hydrate slurry is further heated and melted and decomposed and then enters the storage tank 12. When the ice slurry storage in the reaction tank is close to 0, the cold supply process ends.

[0030] Operating state 3, the cold release working state of the refrigeration machine: Open the first valve 14 and the second valve 15, and close other valves; The low-temperature and low-pressure liquid refrigerant working medium in the refrigeration machine 1 completes the cold release process at the first evaporator 3.

[0031] Operating state 4: The combined cold release working state of the tetrahydrofuran hydrate slurry cold storage tank and the refrigeration machine, that is, the heat absorbed by the decomposition of the tetrahydrofuran hydrate slurry is not enough to meet the cold demand of the user end, and the conventional refrigerant cold supply system is needed to make up for the cold. Adjust the device to operate in working state 2 and working state 3 at the same time. In addition, the compression ratio of the compressor in the refrigeration machine 1 needs to be adjusted twice through the control system 2 to provide less refrigerating capacity.

[0032] Operating state 5, the realization process of the alternating continuous cold storage and cold supply working state of the tetrahydrofuran hydrate slurry includes four steps.

[0033] Step 1: Initial cold storage stage, open the first valve 14, the third valve 16, the fourth valve 17, the seventh valve 20, and the eighth valve 21, and close the second valve 15 to complete the working process of operating state 1; Before starting the machine, start the second circulation pump 18 and inject the mixture into both reaction tanks respectively. The initial injection volume is V s1After the injection is completed, the seventh valve 20 and the eighth valve 21 are closed; after the refrigerator 1 starts working, the cold energy is transported to the tetrahydrofuran hydrate cold storage tank 5, and the mixed liquid in the two reaction tanks gradually generates tetrahydrofuran hydrate ice crystals. When stable tetrahydrofuran hydrate is generated, the reactants expand in volume due to the change of phase state, and the solid ice grows upward to trigger the first displacement sensor 25a and the second displacement sensor 25b. The control system 2 transmits the control electrical signal to the flow controller 19 and starts the second circulation pump 18 for the received displacement sensor signal, opens the seventh valve 20 and the eighth valve 21, and injects a volume of V into the reaction tank respectively. s2 The mixed liquid is replenished, and all the ice crushers at the bottom of the reaction tank are started at the same time. After the injection is completed, the seventh valve 20 and the eighth valve 21 are closed, and the initial cold storage stage is ended.

[0034] Step 2: During the cooling stage of the tetrahydrofuran hydrate slurry in the first tetrahydrofuran hydrate reaction tank 5a, the process in the second working state is followed, only the first tetrahydrofuran hydrate reaction tank 5a is operated, the ninth valve 22 is opened, other valves are closed, the first circulation pump 7 and the second fan 9 are started, and when the hydrate ice slurry reserve in the first tetrahydrofuran hydrate reaction tank 5a is close to 0, the first liquid level sensor 26a is triggered, and the ninth valve 22 is closed;

[0035] Step 3: During the stage where the tetrahydrofuran hydrate slurry in the first tetrahydrofuran hydrate reaction tank 5a is cooled and the tetrahydrofuran hydrate slurry in the second tetrahydrofuran hydrate reaction tank 5b is cooled, the first liquid level sensor 26a transmits a sensing signal to the control system 2, and the second circulating pump 18 is started to inject a volume V of the tetrahydrofuran hydrate slurry into the first tetrahydrofuran hydrate reaction tank 5a. s1 The mixed liquid is then added, and at the same time, the hydrate ice slurry in the second tetrahydrofuran hydrate reaction tank 5b undergoes a cooling step, and the first tetrahydrofuran hydrate reaction tank 5a undergoes a cold storage step; in order to ensure that cooling and cold storage can start and end at the same time and achieve a continuous cooling effect, the flow rate of the first circulating pump 7 is controlled to match the time required for cold storage; when the hydrate ice slurry reserve in the second tetrahydrofuran hydrate reaction tank 5b is close to 0, the second liquid level sensor 26b is triggered, and the cooling is ended.

[0036] Step 4: During the stage of cooling the tetrahydrofuran hydrate slurry in the second tetrahydrofuran hydrate reaction tank 5b and cooling the tetrahydrofuran hydrate slurry in the first tetrahydrofuran hydrate reaction tank 5a, the second liquid level sensor 26b transmits a sensing signal to the control system, starts the second circulation pump 18, and injects a volume V of the tetrahydrofuran hydrate slurry into the second tetrahydrofuran hydrate reaction tank 5b. s1The mixture, and at the same time, the working step of cooling the hydrate ice slurry in the first tetrahydrofuran hydrate reaction tank 5a is carried out, and the cold storage working step is carried out in the second tetrahydrofuran hydrate reaction tank 5b; control the flow rate of the first circulation pump 7 to match the time required for cold storage. When the storage volume of the hydrate ice slurry in the first tetrahydrofuran hydrate reaction tank 5a is close to 0, the first liquid level sensor 26a is triggered, and the cooling ends.

[0037] Repeating the above four steps can realize the alternating continuous cold storage and cold supply working states of the first tetrahydrofuran hydrate reaction tank 5a and the second tetrahydrofuran hydrate reaction tank 5b.

[0038] The above embodiments only represent several implementation modes of the present invention, and the description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the invention patent. Those skilled in the art can also make various equivalent deformations or replace the cold storage working medium without departing from the spirit of this application, and these equivalent deformations or replacement of the cold storage working medium are all included in the scope defined by the claims of this application.

Claims

1. An integrated household air conditioner device based on tetrahydrofuran hydrate technology, characterized in that the integrated household air conditioner device includes a refrigerator (1), a control system (2), an evaporator, a blower, a hydrate cold storage tank (5), a tetrahydrofuran hydrate reaction tank, a motor (6), a first circulation pump (7), a heating coil (10), a heat insulation cover (11), a liquid storage tank (12), a three-way valve (13), valves, a flow controller (19), an ice crusher, a displacement sensor (25) and a liquid level sensor (26); The main body of the device is a cuboid hydrate cold storage tank (5). Two symmetrical reaction tanks are vertically assembled at the bottom of the hydrate cold storage tank (5), namely a first tetrahydrofuran hydrate reaction tank (5a) and a second tetrahydrofuran hydrate reaction tank (5b). The height of the reaction tank is less than the height of the hydrate cold storage tank (5). The inner cavity formed by the outer wall of the reaction tank and the inner wall of the hydrate cold storage tank (5) serves as a refrigerant flow channel. There is an opening at each of the upper and lower parts of the inner cavity, which are respectively a refrigerant outlet and an injection port. The internal structures of the two reaction tanks are the same. A displacement sensor (25) is installed at a position 0.95H in height on the inner wall of the reaction tank. The calculation formula of H is: Among them, H is the maximum vertical height that the initial mixed liquid of volume V s1 can reach due to the growth and expansion of the generated solid hydrate, in m; V s3 is the volume of the generated solid hydrate; S is the internal bottom area of the reaction tank, in m 2 ; According to the characteristics of tetrahydrofuran and the mechanism of hydrate formation, the calculation formulas for the initial injection volume and the supplementary injection volume of the tetrahydrofuran-water mixed liquid in a single cycle are: V s2 =V - V s1 (3) V s3 =fV (4) Among them, V s1 is the initial injection volume of the mixed liquid, in m 3 ; V s2 is the supplementary injection volume of the mixed liquid, in m 3 ; V is the capacity volume of the reaction tank, in m 3 ; f is the volume fraction of the generated solid hydrate in the system, %, and the value of f should be controlled within 70%; 1.25 is the expansion coefficient. When 1 mol of water is converted into hydrate, its volume expands to 1.25 times the original volume. A liquid level sensor (26) is installed at the lowermost part of the inner wall of the reaction tank. Two ice crushers are installed equidistantly on both sides of the center of the bottom of the reaction tank. There are openings at the top and bottom of the reaction tank, which are the mixed liquid injection port and the hydrate slurry flow outlet respectively. A refrigerator (1) and a control system (2) are assembled on the left side of the hydrate cold storage pool (5). A liquid storage tank (12) is assembled on the right side of the hydrate cold storage pool (5). A first circulation pump (7) is assembled below the liquid storage tank (12). At the outermost right side of the device, there are two evaporators arranged in alignment up and down, and a fan is installed on the left side of each evaporator. The device has four lines, including a refrigerant flow line, a mixed liquid flow line, a hydrate slurry flow line, and a sensing control circuit. Refrigerant flow line: The outlet of the refrigerator (1) passes through the first valve (14) and the three-way valve (13) and then divides into two branches. One branch passes through the second valve (15) and is connected to the inlet end of the first evaporator (3). The outlet end of the first evaporator (3) is connected to the refrigerator (1). The other branch passes through the third valve (16) and is connected to the refrigerant inlet at the bottom of the hydrate cold storage pool (5). The refrigerant outlet passes through the fourth valve (17) and flows back to the refrigerator (1). Mixed liquid flow line: The water-tetrahydrofuran mixed liquid is stored in the liquid storage tank (12). There are openings at the top and bottom of the liquid storage tank (12), which are the water-tetrahydrofuran mixed liquid flow outlet and the injection port respectively. The upper outlet passes through the second circulation pump (18) and the flow controller (19) and then divides into two branches. One branch passes through the seventh valve (20) and is connected to the first tetrahydrofuran hydrate reaction tank (5a). The other branch passes through the eighth valve (21) and is connected to the second tetrahydrofuran hydrate reaction tank (5b). The lower injection port is connected to the outlet of the heating coil (10). Hydrate slurry flow line: The generated hydrate slurry is released from the hydrate slurry flow outlet at the bottom of the reaction tank. After passing through the ninth valve (22) and the tenth valve (23) respectively, it converges into a pipeline, passes through the first circulation pump (7), and is connected to the inlet end of the second evaporator (8). The outlet of the second evaporator (8) is connected to the inlet of the heating coil (10). The hydrate slurry is finally completely melted and decomposed in the heating coil. Sensing control circuit: The flow controller (19), displacement sensor, liquid level sensor, first circulation pump (7), and refrigerator (1) are all connected to the control system (2) by signal lines.

2. The integrated household air conditioner device according to claim 1, wherein The heating coil (10) is coiled around the outer shell of the motor (6) of the first circulation pump (7), and the heat insulation cover (11) wraps the motor (6) and the heating coil (10) inside.

3. The integrated household air conditioner device according to claim 1, characterized in that, The liquid storage tank (12) is used to store the water-tetrahydrofuran mixed liquid to prevent the regenerated mixed liquid from flowing into the reaction tank during the non-ice slurry preparation stage.

4. The integrated household air conditioning device according to claim 1, characterized in that, The control system (2) receives and feedbacks the sensor signals, and its signals serve as the front-end information for other actions; controls the compressor in the refrigerator (1) to adjust the cooling capacity of the conventional refrigerant; controls the flow controller (19) to adjust the injection amount of the mixed liquid; controls the first circulation pump (7) to adjust the ice slurry flow rate at the user end.

5. The method of the integrated household air conditioner device based on tetrahydrofuran hydrate technology according to claim 1, characterized in that, The method includes five working states: the refrigerator cools the tetrahydrofuran hydrate slurry cold storage tank, the tetrahydrofuran hydrate slurry releases cold, the refrigerator releases cold, the tetrahydrofuran hydrate slurry cold storage tank and the refrigerator jointly release cold, and the tetrahydrofuran hydrate slurry alternately and continuously stores and releases cold. Working state one, the working state of the refrigerator (1) cooling the hydrate cold storage tank: Open the first valve (14), the third valve (16), and the fourth valve (17), and close other valves; Before the refrigerator (1) works, inject a tetrahydrofuran-water mixture into the reaction tank in advance, start the refrigerator (1), and adjust the refrigerating capacity of the conventional refrigerant. The conventional gaseous refrigerant is compressed, condensed, and throttled and expanded in the refrigerator (1) to form a low-temperature and low-pressure liquid working medium, which flows into the hydrate cold storage tank (5) to complete the process of releasing cold; The gaseous working medium flows back into the refrigerator (1) and is recompressed into a high-temperature and high-pressure gas; When the reaction tank is filled with a stable tetrahydrofuran hydrate ice slurry, the cold storage process ends. Working state two, the working state of the tetrahydrofuran hydrate slurry releasing cold: Open the ninth valve (22) and the tenth valve (23), and close other valves; Start the first circulation pump (7) and the second fan (9); Under the suction of the first circulation pump (7), the tetrahydrofuran hydrate slurry flows into the coil in the second evaporator (8). After the tetrahydrofuran hydrate slurry absorbs the heat in the air at the user end and decomposes, it flows out from the outlet of the second evaporator (8) and enters the heating coil (10). The solid-liquid mixture of the tetrahydrofuran hydrate slurry is further heated and melted and decomposed and then enters the storage tank (12). When the ice slurry storage in the reaction tank is close to 0, the cooling process ends. Working state three, the working state of the refrigerator releasing cold: Open the first valve (14) and the second valve (15), and close other valves; The low-temperature and low-pressure liquid refrigerant working medium in the refrigerator (1) completes the process of releasing cold at the first evaporator (3). Working state four: The working state of the tetrahydrofuran hydrate slurry cold storage tank and the refrigerator jointly releasing cold. Adjust the device to operate in working state two and working state three at the same time. In addition, the compression ratio of the compressor in the refrigerator (1) needs to be adjusted twice through the control system (2) to provide less refrigerating capacity. Working state five, the realization process of the working state of the tetrahydrofuran hydrate slurry alternately and continuously storing and cooling includes four steps. Step 1: In the initial cold storage stage, the first valve (14), the third valve (16), the fourth valve (17), the seventh valve (20), and the eighth valve (21) are opened, and the second valve (15) is closed to complete the work flow of the working state 1; before starting the machine, the second circulation pump (18) is started to inject the mixed liquid into the two reaction tanks respectively, and the initial injection volume is V s1 After the injection is completed, the seventh valve (20) and the eighth valve (21) are closed; after the refrigerator (1) starts working, the cold energy is transported to the tetrahydrofuran hydrate cold storage tank (5), and the mixed liquid in the two reaction tanks gradually generates tetrahydrofuran hydrate ice crystals. When stable tetrahydrofuran hydrate is generated, the reactants expand in volume due to the change of phase state, and the solid ice grows upward to trigger the first displacement sensor (25a) and the second displacement sensor (25b). The control system (2) transmits the control electrical signal to the flow controller (19) and starts the second circulation pump (18) based on the received displacement sensor signal, and opens the seventh valve (20) and the eighth valve (21), and injects a volume of V into the reaction tank respectively. s2 The mixed liquid is replenished, and all ice crushers at the bottom of the reaction tank are started at the same time. After the injection is completed, the seventh valve (20) and the eighth valve (21) are closed, and the initial cold storage stage ends; Step two: In the stage of the tetrahydrofuran hydrate slurry in the first tetrahydrofuran hydrate reaction tank (5a) releasing cold, follow the process in working state two, and only operate on the first tetrahydrofuran hydrate reaction tank (5a). Open the ninth valve (22), close other valves, start the first circulation pump (7) and the second fan (9). When the ice slurry storage in the first tetrahydrofuran hydrate reaction tank (5a) is close to 0, trigger the first liquid level sensor (26a) and close the ninth valve (22). Step 3: During the stage when the tetrahydrofuran hydrate slurry in the first tetrahydrofuran hydrate reaction tank (5a) stores cold and the tetrahydrofuran hydrate slurry in the second tetrahydrofuran hydrate reaction tank (5b) releases cold simultaneously, the sensing signal of the first liquid level sensor (26a) is transmitted to the control system (2), and the second circulation pump (18) is started to inject a mixture with a volume of V s1 into the first tetrahydrofuran hydrate reaction tank (5a). At the same time, the hydrate ice slurry in the second tetrahydrofuran hydrate reaction tank (5b) performs the cold release operation step, and the first tetrahydrofuran hydrate reaction tank (5a) performs the cold storage operation step; control the flow rate of the first circulation pump (7) to match the time required for cold storage; when the storage volume of the hydrate ice slurry in the second tetrahydrofuran hydrate reaction tank (5b) is close to 0, trigger the second liquid level sensor (26b), and the cold release ends; Step 4: During the stage when the tetrahydrofuran hydrate slurry in the second tetrahydrofuran hydrate reaction tank (5b) stores cold and the tetrahydrofuran hydrate slurry in the first tetrahydrofuran hydrate reaction tank (5a) releases cold, the sensing signal of the second liquid level sensor (26b) is transmitted to the control system, and the second circulation pump (18) is started to inject a mixture with a volume of V s1 into the second tetrahydrofuran hydrate reaction tank (5b). Meanwhile, the hydrate ice slurry in the first tetrahydrofuran hydrate reaction tank (5a) performs the cold release operation step, and the second tetrahydrofuran hydrate reaction tank (5b) performs the cold storage operation step; control the flow rate of the first circulation pump (7) to match the required cold storage time; when the storage volume of the hydrate ice slurry in the first tetrahydrofuran hydrate reaction tank (5a) approaches 0, trigger the first liquid level sensor (26a) to end the cold release; Repeating the above four steps can realize the working state of the first tetrahydrofuran hydrate reaction tank (5a) and the second tetrahydrofuran hydrate reaction tank (5b) alternately and continuously storing and cooling.

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