Cold storage type integrated cold station and control method thereof

Abstract

The invention discloses a cold accumulation type integrated cold station and a control method thereof, and relates to the field of integrated cold stations. The integrated cold station comprises a refrigerating unit, a cooling tower, a heat exchanger, a water tank and a controller. The refrigerating unit is connected with the cooling tower through a first pipeline and a second pipeline, and the refrigerating unit is connected with the user side through a third pipeline and a fourth pipeline; the fourth pipeline is connected with the heat exchanger through a fifth pipeline; the water tank is connected with the chilled water pipe network system through a sixth pipeline and a seventh pipeline; a first adjusting valve, a second adjusting valve and a third adjusting valve are arranged on the fifth pipeline, the sixth pipeline and the seventh pipeline correspondingly, and the controller judges the working mode of the integrated cold station according to the refrigerating capacity required by a user and controls opening and closing of the first adjusting valve, the second adjusting valve and the third adjusting valve according to the working mode. The performance coefficient of the refrigerating unit under low load is improved by means of peak clipping and valley filling, and the balance of the efficiency of the refrigerating unit between the peak period and the low peak period of air conditioner use is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrated refrigeration stations, and in particular relates to a cold storage type integrated refrigeration station and a control method thereof. Background Art

[0002] Integrated cold storage is gaining more and more attention due to its high unit energy efficiency and compact structure. The current integrated cold storage focuses on improving the energy efficiency of its units, such as using magnetic levitation main engine to raise the energy efficiency ratio of integrated cold storage to a new height. However, the current integrated cold storage is similar to traditional air conditioning systems. The efficiency of the refrigeration unit is difficult to balance between the peak and off-peak periods of air conditioning use. Especially under low load conditions, the refrigeration unit can only operate in the low performance coefficient working range, which refers to the range of low system operating efficiency, insufficient output power, and poor performance.

[0003] How to efficiently utilize the high energy storage capacity of the integrated cold station and improve the performance coefficient of the refrigeration unit under low load by means of "peak shaving and valley filling" is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The object of the present invention is to provide a cold storage integrated refrigeration station and a control method thereof, so as to solve the problem that the efficiency of the refrigeration unit is difficult to balance between the peak period and the off-peak period.

[0005] The present invention solves the above technical problems through the following technical solutions: a cold storage integrated cold station, comprising a refrigeration unit, a cooling tower, a heat exchanger, a water tank and a controller, wherein the heat exchanger is arranged in the water tank; the first outlet of the refrigeration unit is connected to the inlet of the cooling tower through a first pipe, the first inlet of the refrigeration unit is connected to the outlet of the cooling tower through a second pipe, the second inlet of the refrigeration unit is used to be connected to the user end through a third pipe, and the second outlet of the refrigeration unit is used to be connected to the user end through a fourth pipe; the fourth pipe is connected to the heat exchanger through a fifth pipe; the outlet of the water tank is used to be connected to a chilled water pipe network system through a sixth pipe, and the inlet of the water tank is used to be connected to the chilled water pipe network system through a seventh pipe;

[0006] A first regulating valve is provided on the fifth pipeline, a second regulating valve is provided on the sixth pipeline, and a third regulating valve is provided on the seventh pipeline. The first regulating valve, the second regulating valve and the third regulating valve are respectively connected to the controller. The controller is used to determine the working mode of the integrated cold station according to the cooling capacity required by the user, and control the opening and closing of the first regulating valve, the second regulating valve and the third regulating valve according to the working mode, so as to achieve a balance between the efficiency of the refrigeration unit during the peak and off-peak periods of air-conditioning use.

[0007] Furthermore, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the sixth pipeline and the seventh pipeline are straight pipes, the right-angle pipe sections on the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the sixth pipeline and the seventh pipeline are replaced with oblique pipe sections, and the right-angle elbows are obtuse-angle elbows or obtuse-angle tees.

[0008] Furthermore, a first water pump is provided on the first pipeline, and a second water pump is provided on the third pipeline. The cooling water in the pipeline is pressurized by the first water pump, and the chilled water in the pipeline is pressurized by the second water pump.

[0009] Furthermore, a first water pressure gauge is provided on the third pipeline, and a second water pressure gauge is provided on the fourth pipeline, and the pressure of the chilled water return water and the chilled water outlet water are respectively detected by the first water pressure gauge and the second water pressure gauge.

[0010] Furthermore, the refrigeration unit includes multiple units, and the multiple refrigeration units are connected in parallel.

[0011] Furthermore, the power supply end of the refrigeration unit is connected to an external power supply via a control switch, the control switch is connected to the controller, and the controller is also used to control the stop or start of the refrigeration unit by controlling the opening and closing of the control switch.

[0012] Furthermore, the refrigeration unit, heat exchanger, water tank and controller are arranged in a container.

[0013] Based on the same concept, the present invention provides a control method for the cold storage integrated cold station as described above, comprising:

[0014] Obtain the cooling capacity required by the user;

[0015] Determine the working mode of the integrated cold station according to the cooling capacity required by the user;

[0016] The opening and closing of the first regulating valve, the second regulating valve and the third regulating valve are controlled according to the working mode to achieve a balance in the efficiency of the refrigeration unit during the peak and off-peak periods of air conditioning use.

[0017] Further, judging the working mode of the integrated cold station according to the user demand cooling capacity, and controlling the opening and closing of the first regulating valve, the second regulating valve and the third regulating valve according to the working mode, specifically includes:

[0018] When the second cooling capacity threshold value is ≤ the user required cooling capacity ≤ the first cooling capacity threshold value, the working mode of the integrated cold station is the normal cooling mode, and the first regulating valve, the second regulating valve and the third regulating valve are controlled to be closed;

[0019] When the user's required cooling capacity is less than the second cooling capacity threshold, the integrated cold station operates in a low-peak cold storage mode, controls the first regulating valve to open, and controls the second regulating valve and the third regulating valve to close;

[0020] When the first cooling capacity threshold is less than the user's required cooling capacity, the integrated cold station operates in a peak combined cooling mode, the first regulating valve is controlled to be closed, and the second regulating valve and the third regulating valve are controlled to be opened.

[0021] Furthermore, when the user required cooling capacity is less than the second cooling capacity threshold, the opening of the first regulating valve is controlled according to the second cooling capacity threshold and the user required cooling capacity, specifically including:

[0022] Calculating the ratio of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit;

[0023] It is determined whether the ratio is greater than a first ratio threshold value. If so, the first regulating valve is controlled to be closed; if not, the opening of the first regulating valve is calculated according to the ratio, and the control is performed according to the calculated opening of the first regulating valve; the first ratio threshold value is equal to the ratio of the second refrigeration capacity threshold value to the load rate of the refrigeration unit; wherein the calculation formula of the opening of the first regulating valve is:

[0024] O 1 =-0.75r+1;

[0025] Among them, O 1 represents the opening degree of the first regulating valve, and r represents the ratio of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit;

[0026] When the first cooling capacity threshold is less than the user required cooling capacity, the openings of the second regulating valve and the third regulating valve are controlled according to the user required cooling capacity and the first cooling capacity threshold, specifically including:

[0027] Calculating the ratio of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit;

[0028] Determine whether the ratio is less than a second ratio threshold, and if the ratio is less than the second ratio threshold, control the second regulating valve and the third regulating valve to be closed;

[0029] If the ratio is greater than or equal to the second ratio threshold, it is determined whether the ratio is greater than the third ratio threshold. If the ratio is greater than the third ratio threshold, the second regulating valve and the third regulating valve are controlled to be fully opened; if the ratio is less than or equal to the third ratio threshold, the opening of the second regulating valve and the third regulating valve is calculated according to the ratio, and the second regulating valve and the third regulating valve are controlled according to the calculated opening; the second ratio threshold is equal to the ratio of the first refrigeration capacity threshold to the load rate of the refrigeration unit;

[0030] The calculation formulas for the openings of the second regulating valve and the third regulating valve are as follows:

[0031]

[0032] Among them, O 2 Indicates the opening degree of the second regulating valve or the third regulating valve; the third proportional threshold is greater than the first proportional threshold.

[0033] Furthermore, the first refrigeration capacity threshold is 85% of the refrigeration unit load factor, and the second refrigeration capacity threshold is 75% of the refrigeration unit load factor.

[0034] Beneficial Effects

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] The present invention determines the peak period, off-peak period or normal period of air-conditioning use according to the cooling capacity required by the user. During the peak period of air-conditioning use, the second regulating valve and the third regulating valve are controlled to open so that the chilled water stored in the water tank is discharged into the chilled water pipe network system, thereby realizing the combined cooling of the integrated cold station and the air-conditioning, and reducing the peak power consumption of the urban power grid; during the off-peak period of air-conditioning use, the first regulating valve is controlled to open so as to realize the storage of chilled water. The stored chilled water, as a resource, can improve the efficiency of energy use and generate more economic benefits; the present invention improves the performance coefficient of the refrigeration unit under low load by means of "peak shaving and valley filling", realizes the balance of the efficiency of the refrigeration unit between the peak period and the off-peak period of air-conditioning use, balances and adjusts the structure of the urban power grid, and realizes energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 Schematic diagram of the structure of a cold storage integrated cold station in an embodiment of the present invention;

[0039] Figure 2 It is a control flow chart of the cold storage integrated cooling station in the embodiment of the present invention.

[0040] Explanation of the accompanying drawings: 1-refrigeration unit, 2-cooling tower, 3-water tank, 4-heat exchanger, 5-first pipeline, 6-second pipeline, 7-third pipeline, 8-fourth pipeline, 9-fifth pipeline, 10-sixth pipeline, 11-seventh pipeline, 12-first regulating valve, 13-second regulating valve, 14-third regulating valve, 15-second water pump, 16-first water pump, 17-first water pressure gauge, 18-second water pressure gauge, 19-control switch, 20-container, 21-controller. DETAILED DESCRIPTION

[0041] The following is a clear and complete description of the technical solutions in the present invention in conjunction with the drawings 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.

[0042] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0043] like Figure 1 As shown, a cold storage integrated cold station provided by an embodiment of the present invention comprises a refrigeration unit 1, a cooling tower 2, a heat exchanger 4, a water tank 3 and a controller 21, wherein the heat exchanger 4 is arranged in the water tank 3; a first outlet of the refrigeration unit 1 is connected to an inlet of the cooling tower 2 through a first pipe 5, a first inlet of the refrigeration unit 1 is connected to an outlet of the cooling tower 2 through a second pipe 6, a second inlet of the refrigeration unit 1 is connected to a user end through a third pipe 7, and a second outlet of the refrigeration unit 1 is connected to a user end through a fourth pipe 8; the fourth pipe 8 is connected to the heat exchanger 4 through a fifth pipe 9, and the heat exchanger 4 is also connected to the integrated The chilled water after heat exchange returns to the water collector, and then circulates back to the refrigeration unit 1 through the second water pump 15 for reprocessing; the fourth pipeline 8 is connected to the fifth pipeline 9 through a tee; the outlet of the water tank 3 is connected to the chilled water pipe network system through the sixth pipeline 10, and the inlet of the water tank 3 is connected to the chilled water pipe network system through the seventh pipeline 11; a first regulating valve 12 is provided on the fifth pipeline 9, a second regulating valve 13 is provided on the sixth pipeline 10, and a third regulating valve 14 is provided on the seventh pipeline 11. The first regulating valve 12, the second regulating valve 13 and the third regulating valve 14 are respectively connected to the controller 21. The first regulating valve 12 is used to adjust the amount of chilled water in the fifth pipeline 9, and the second regulating valve 13 and the third regulating valve 14 are used to control the water supply amount of the water tank 3.

[0044] The refrigeration unit 1 is connected to the cooling tower 2 through the first pipe 5 and the second pipe 6, realizing the heat exchange and transmission of cooling water between the refrigeration unit 1 and the cooling tower 2; the refrigeration unit 1 is connected to the user end through the third pipe 7 and the fourth pipe 8, realizing the heat exchange and transmission of chilled water between the refrigeration unit 1 and the user end; the refrigeration unit 1 is connected to the water tank 3 through the fifth pipe 9, realizing the storage of chilled water.

[0045] The controller 21 is used to determine the working mode of the integrated cold station according to the cooling capacity required by the user, and control the opening and closing of the first regulating valve 12, the second regulating valve 13 and the third regulating valve 14 according to the working mode, so as to achieve the balance of the efficiency of the refrigeration unit 1 during the peak period and the off-peak period of air conditioning use. Specifically, when the second cooling capacity threshold ≤ the user required cooling capacity ≤ the first cooling capacity threshold (i.e., the optimal load rate interval of the refrigeration unit 1), the working mode of the integrated cold station is the normal cooling mode, and the first regulating valve 12, the second regulating valve 13 and the third regulating valve 14 are controlled to be closed; when the user required cooling capacity is less than the second cooling capacity threshold, the working mode of the integrated cold station is the low-peak cold storage mode, the first regulating valve 12 is controlled to be opened, the second regulating valve 13 and the third regulating valve 14 are controlled to be closed, and the integrated cold station is cold stored; when the first cooling capacity threshold is less than the user required cooling capacity, the working mode of the integrated cold station is the peak joint cooling mode, the first regulating valve 12 is controlled to be closed, and the second regulating valve 13 and the third regulating valve 14 are controlled to be opened, so as to achieve the joint cooling of the integrated cold station and the air conditioner, thereby reducing the peak power consumption of the urban power grid.

[0046] In a specific embodiment of the present invention, the first pipeline 5, the second pipeline 6, the third pipeline 7, the fourth pipeline 8, the sixth pipeline 10 and the seventh pipeline 11 are straight pipes, reducing elbows; the right-angle pipe sections on the first pipeline 5, the second pipeline 6, the third pipeline 7, the fourth pipeline 8, the sixth pipeline 10 and the seventh pipeline 11 are replaced with oblique pipe sections, and the right-angle elbows are obtuse-angle elbows or obtuse-angle tees, which can reduce resistance, extend equipment life, improve stability, and adapt to various working conditions.

[0047] In a specific embodiment of the present invention, a first water pump 16 is provided on the first pipeline 5, and a second water pump 15 is provided on the third pipeline 7. The first water pump 16 is used to pressurize the cooling water in the pipeline, and the second water pump 15 is used to pressurize the chilled water in the pipeline.

[0048] In a specific embodiment of the present invention, a first water pressure gauge 17 is provided on the third pipeline 7, and a second water pressure gauge 18 is provided on the fourth pipeline 8. The first water pressure gauge 17 and the second water pressure gauge 18 are used to respectively detect the pressure of the chilled water return water and the chilled water outlet water to ensure the normal operation of the integrated cold station.

[0049] In a specific embodiment of the present invention, the refrigeration unit 1 includes multiple refrigeration units 1 connected in parallel. The number of refrigeration units 1 is determined according to the refrigeration capacity required by the user, and each refrigeration unit 1 corresponds to a first water pump 16 and a second water pump 15.

[0050] In a specific embodiment of the present invention, the power supply end of the refrigeration unit 1 is connected to an external power supply through a control switch 19, and the control switch 19 is connected to a controller 21. The controller 21 is also used to control the stop or start of the refrigeration unit 1 by controlling the opening and closing of the control switch 19. In this embodiment, the control switch 19 is a solenoid valve.

[0051] In a specific embodiment of the present invention, the water tank 3 is used to store chilled water resources. The water tank 3 is made of polyisocyanurate, which has significant advantages in terms of thermal insulation performance, flame retardancy, chemical stability, light weight and high strength, waterproof and vapor permeability, adaptability, environmental protection and durability.

[0052] In a specific embodiment of the present invention, the refrigeration unit 1 , the heat exchanger 4 , the water tank 3 and the controller 21 are arranged in a container 20 .

[0053] like Figure 2 As shown, the control method of the cold storage integrated cold station in the embodiment of the present invention includes the following steps:

[0054] Step 1: Obtain the cooling capacity required by the user.

[0055] The user's required cooling capacity is equal to the product of the sum of the indoor and outdoor temperature difference cooling load, the human body heat dissipation cooling load, the equipment heat dissipation cooling load and the fresh air cooling load and the safety factor. The calculation of the user's required cooling capacity is an existing technology.

[0056] Step 2: Determine the working mode of the integrated cold station based on the cooling capacity required by the user.

[0057] Specifically, when the second cooling capacity threshold ≤ the user required cooling capacity ≤ the first cooling capacity threshold, the working mode of the integrated cooling station is the normal cooling mode;

[0058] When the user's required cooling capacity is less than the second cooling capacity threshold, the integrated cooling station operates in a low-peak cold storage mode;

[0059] When the first cooling capacity threshold is less than the user's required cooling capacity, the working mode of the integrated cooling station is the peak combined cooling mode.

[0060] In this embodiment, the first refrigeration capacity threshold is 85% of the refrigeration unit load factor, and the second refrigeration capacity threshold is 75% of the refrigeration unit load factor.

[0061] Step 3: Control the opening and closing of the first regulating valve, the second regulating valve and the third regulating valve according to the working mode to achieve a balance between the efficiency of the refrigeration unit during the peak and off-peak periods of air conditioning use.

[0062] Specifically, when the working mode of the integrated cold station is the normal cooling mode, the first regulating valve, the second regulating valve and the third regulating valve are controlled to be closed;

[0063] When the working mode of the integrated cold station is the low-peak cold storage mode, the first regulating valve is controlled to open, the chilled water is stored in the water tank, and the second regulating valve and the third regulating valve are controlled to close;

[0064] When the working mode of the integrated cold station is the peak combined cooling mode, the first regulating valve is controlled to close, and the second regulating valve and the third regulating valve are controlled to open, and the chilled water in the water tank flows into the chilled water pipe network system to realize the combined cooling of the integrated cold station and the air conditioner.

[0065] In a specific embodiment of the present invention, when the working mode of the integrated cold station is the low-peak cold storage mode, the opening of the first regulating valve is also controlled according to the second cooling capacity threshold and the user required cooling capacity, specifically including:

[0066] Calculate the ratio r of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit;

[0067] It is determined whether the ratio r is greater than the first ratio threshold value. If so, the first regulating valve is controlled to be closed; if not, the opening of the first regulating valve is calculated according to the ratio r, and the control is performed according to the calculated opening of the first regulating valve; the first ratio threshold value is equal to the ratio of the second refrigeration capacity threshold value to the load rate of the refrigeration unit; wherein, the calculation formula of the opening of the first regulating valve is:

[0068] O 1 =-0.75r+1 (1)

[0069] Among them, O 1 Indicates the opening of the first regulating valve. In this embodiment, the second refrigeration capacity threshold is 75% of the refrigeration unit load rate, and the first proportional threshold is 75%. When 0≤r≤75%, the opening of the first regulating valve is calculated according to formula (1); when 75%<r, the first regulating valve is controlled to be closed.

[0070] In a specific embodiment of the present invention, when the first cooling capacity threshold is less than the user required cooling capacity, the openings of the second regulating valve and the third regulating valve are controlled according to the user required cooling capacity and the first cooling capacity threshold, specifically including:

[0071] Calculate the ratio r of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit;

[0072] Determine whether the ratio r is less than a second ratio threshold value, and if the ratio r is less than the second ratio threshold value, control the second regulating valve and the third regulating valve to be closed;

[0073] If the ratio r is greater than or equal to the second ratio threshold, it is determined whether the ratio r is greater than the third ratio threshold. If the ratio r is greater than the third ratio threshold, the second regulating valve and the third regulating valve are controlled to be fully opened; if the ratio r is less than or equal to the third ratio threshold, the openings of the second regulating valve and the third regulating valve are calculated according to the ratio r, and the second regulating valve and the third regulating valve are controlled according to the calculated openings; the second ratio threshold is equal to the ratio of the first cooling capacity threshold to the load rate of the refrigeration unit;

[0074] The calculation formulas for the opening of the second regulating valve and the third regulating valve are as follows:

[0075]

[0076] Among them, O 2 Indicates the opening of the second regulating valve or the third regulating valve; the third proportional threshold is greater than the first proportional threshold. In this embodiment, the first refrigeration capacity threshold is 85% of the refrigeration unit load rate, the second proportional threshold is 85%, and the third proportional threshold is 125%. When r < 85%, the second regulating valve and the third regulating valve are controlled to be closed; when 125% < r, the second regulating valve and the third regulating valve are controlled to be fully open; when 85% ≤ r ≤ 125%, the opening of the second regulating valve and the third regulating valve is calculated according to formula (2).

[0077] In another specific embodiment of the present invention, the controller uses a PID control algorithm to adjust the opening of the first regulating valve according to the difference between the second cooling capacity threshold and the user's required cooling capacity; the controller uses a PID control algorithm to adjust the openings of the second regulating valve and the third regulating valve according to the difference between the user's required cooling capacity and the first cooling capacity threshold. In order to maintain the water tank chilled water circulation, the second regulating valve and the third regulating valve have the same opening.

[0078] The present invention not only has high energy efficiency of the refrigeration unit, but also can effectively utilize the high energy storage capacity of the integrated cold station by utilizing the three modes of normal cooling, low-peak cold storage and peak combined cooling. By means of "peak shaving and valley filling", the performance coefficient of the refrigeration unit under low load is improved. During the peak period of air-conditioning use, the chilled water stored in the integrated cold station is used to reduce the peak power consumption of the urban power grid, balance and adjust the urban power grid structure, and achieve energy conservation and emission reduction.

[0079] What is disclosed above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A cold storage integrated cooling station, characterized in that: The integrated cold station includes a refrigeration unit, a cooling tower, a heat exchanger, a water tank and a controller, wherein the heat exchanger is arranged in the water tank; the first outlet of the refrigeration unit is connected to the inlet of the cooling tower through a first pipe, the first inlet of the refrigeration unit is connected to the outlet of the cooling tower through a second pipe, the second inlet of the refrigeration unit is used to be connected to the user end through a third pipe, and the second outlet of the refrigeration unit is used to be connected to the user end through a fourth pipe; the fourth pipe is connected to the heat exchanger through a fifth pipe; the outlet of the water tank is used to be connected to the chilled water pipe network system through a sixth pipe, and the inlet of the water tank is used to be connected to the chilled water pipe network system through a seventh pipe; A first regulating valve is provided on the fifth pipeline, a second regulating valve is provided on the sixth pipeline, and a third regulating valve is provided on the seventh pipeline. The first regulating valve, the second regulating valve and the third regulating valve are respectively connected to the controller. The controller is used to determine the working mode of the integrated cold station according to the cooling capacity required by the user, and control the opening and closing of the first regulating valve, the second regulating valve and the third regulating valve according to the working mode, so as to achieve a balance between the efficiency of the refrigeration unit during the peak and off-peak periods of air-conditioning use.

2. The cold storage integrated cold station according to claim 1, characterized in that: The first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the sixth pipeline and the seventh pipeline are straight pipes, the right-angle pipe sections on the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the sixth pipeline and the seventh pipeline are replaced with oblique pipe sections, and the right-angle elbows are obtuse-angle elbows or obtuse-angle tees.

3. The cold storage integrated cold station according to claim 1, characterized in that: A first water pump is provided on the first pipeline, and a second water pump is provided on the third pipeline.

4. The cold storage integrated cold station according to claim 1, characterized in that: A first water pressure gauge is provided on the third pipeline, and a second water pressure gauge is provided on the fourth pipeline.

5. The cold storage integrated cold station according to claim 1, characterized in that: The refrigeration unit comprises a plurality of refrigeration units, and the plurality of refrigeration units are connected in parallel.

6. The cold storage integrated refrigeration station according to any one of claims 1 to 5, characterized in that: The power supply end of the refrigeration unit is connected to an external power supply via a control switch, and the control switch is connected to the controller. The controller is also used to control the stop or start of the refrigeration unit by controlling the opening and closing of the control switch.

7. A control method for a cold storage integrated cooling station according to any one of claims 1 to 6, characterized in that: The control method comprises: Obtain the cooling capacity required by the user; Determine the working mode of the integrated cold station according to the cooling capacity required by the user; The opening and closing of the first regulating valve, the second regulating valve and the third regulating valve are controlled according to the working mode to achieve a balance in the efficiency of the refrigeration unit during the peak and off-peak periods of air conditioning use.

8. The control method of the cold storage integrated cold station according to claim 7, characterized in that: Determining the working mode of the integrated cold station according to the user's required cooling capacity, and controlling the opening and closing of the first regulating valve, the second regulating valve, and the third regulating valve according to the working mode, specifically includes: When the second cooling capacity threshold value is ≤ the user required cooling capacity ≤ the first cooling capacity threshold value, the working mode of the integrated cold station is the normal cooling mode, and the first regulating valve, the second regulating valve and the third regulating valve are controlled to be closed; When the user's required cooling capacity is less than the second cooling capacity threshold, the integrated cold station operates in a low-peak cold storage mode, controls the first regulating valve to open, and controls the second regulating valve and the third regulating valve to close; When the first cooling capacity threshold is less than the user's required cooling capacity, the integrated cold station operates in a peak combined cooling mode, the first regulating valve is controlled to be closed, and the second regulating valve and the third regulating valve are controlled to be opened.

9. The control method of the cold storage integrated cold station according to claim 8, characterized in that: When the user required cooling capacity is less than the second cooling capacity threshold, the opening of the first regulating valve is further controlled according to the second cooling capacity threshold and the user required cooling capacity, specifically including: Calculating the ratio of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit; It is determined whether the ratio is greater than a first ratio threshold value. If so, the first regulating valve is controlled to be closed; if not, the opening of the first regulating valve is calculated according to the ratio, and the control is performed according to the calculated opening of the first regulating valve; the first ratio threshold value is equal to the ratio of the second refrigeration capacity threshold value to the load rate of the refrigeration unit; wherein the calculation formula of the opening of the first regulating valve is: O1＝-0.75r+1； Wherein, O1 represents the opening degree of the first regulating valve, and r represents the ratio of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit; When the first cooling capacity threshold is less than the user required cooling capacity, the openings of the second regulating valve and the third regulating valve are controlled according to the user required cooling capacity and the first cooling capacity threshold, specifically including: Calculating the ratio of the user's required cooling capacity to the maximum cooling capacity of the refrigeration unit; Determine whether the ratio is less than a second ratio threshold, and if the ratio is less than the second ratio threshold, control the second regulating valve and the third regulating valve to be closed; If the ratio is greater than or equal to the second ratio threshold, it is determined whether the ratio is greater than the third ratio threshold. If the ratio is greater than the third ratio threshold, the second regulating valve and the third regulating valve are controlled to be fully opened; if the ratio is less than or equal to the third ratio threshold, the opening of the second regulating valve and the third regulating valve is calculated according to the ratio, and the second regulating valve and the third regulating valve are controlled according to the calculated opening; the second ratio threshold is equal to the ratio of the first refrigeration capacity threshold to the load rate of the refrigeration unit; The calculation formulas for the openings of the second regulating valve and the third regulating valve are as follows: Wherein, O2 represents the opening degree of the second regulating valve or the third regulating valve; and the third proportional threshold is greater than the first proportional threshold.

10. The control method of the cold storage integrated cold station according to claim 8 or 9, characterized in that: The first refrigeration capacity threshold is 85% of the refrigeration unit load factor, and the second refrigeration capacity threshold is 75% of the refrigeration unit load factor.

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