Cold station and antifreeze method thereof

Abstract

The present invention relates to a cold station and an antifreeze method thereof, wherein the cold station comprises: a chiller, comprising a condenser and an evaporator; a first fluid circulation component, forming a cooling water circulation path with the condenser; a second fluid circulation component, forming a refrigerated water circulation path with the evaporator; and a heat storage and release component, comprising a water tank, a first and a second pipeline, the water tank being configured to keep the water preset therein warm; the two ends of the first pipeline being respectively connected to the cooling water circulation path, a part of the first pipeline between the two ends being arranged in the water tank, the two ends of the second pipeline being respectively connected to the refrigerated water circulation path, a part of the second pipeline between the two ends being arranged in the water tank; wherein the heat storage and release component is configured to absorb and store heat in the cooling water circulation path through the water tank when the chiller is running, and to release heat to at least one of the refrigerated water circulation path and the cooling water circulation path through the water tank when the chiller stops running. The present invention is used to alleviate the problem of ice formation inside the pipeline.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a refrigeration station and an antifreeze method thereof. Background Art

[0002] An integrated cold station is a cooling product that integrates chillers, water pumps, valves and other piping components into containers. Its function is to provide chilled water to the terminal. In cold areas, when the chiller is shut down, there is a risk of freezing of water inside the piping of the cold station system, which may cause the chiller to be unable to start up and operate. Summary of the invention

[0003] Some embodiments of the present invention provide a cold station and an antifreeze method thereof, which are used to alleviate the problem of icing inside pipelines.

[0004] In one aspect of the present invention, a cold station is provided, comprising:

[0005] Chillers, including condensers and evaporators;

[0006] a first fluid circulation component, forming a cooling water circulation path with the condenser;

[0007] A second fluid circulation component, forming a chilled water circulation path with the evaporator; and

[0008] A heat storage and release component comprises a water tank, a first pipeline and a second pipeline, wherein the water tank is configured to keep the water pre-placed therein warm; both ends of the first pipeline are respectively connected to the cooling water circulation path, and a portion between the two ends of the first pipeline is arranged in the water tank; both ends of the second pipeline are respectively connected to the chilled water circulation path, and a portion between the two ends of the second pipeline is arranged in the water tank;

[0009] Wherein, the heat storage and release component is configured to absorb and store heat in the cooling water circulation path through the water tank when the chiller is running, and to release heat to at least one of the refrigerated water circulation path and the cooling water circulation path through the water tank when the chiller stops running.

[0010] In some embodiments, the heat storage and release component includes a first switch valve, which is arranged in the first pipeline. The first switch valve is configured to open when the chiller is running and the temperature in the water tank is lower than a first preset value, and to close when the temperature in the water tank is equal to or higher than the first preset value.

[0011] In some embodiments, the first switch valve is also configured to open when the temperature in the cooling water circulation path is lower than a second preset value when the chiller stops operating, and to close when the temperature in the cooling water circulation path is equal to or higher than the second preset value.

[0012] In some embodiments, the heat storage and release assembly further includes a second switch valve, which is disposed in the second pipeline and is configured to be closed when the chiller is in operation.

[0013] In some embodiments, the second switch valve is also configured to open when the chiller stops running and the temperature in the chilled water circulation path is lower than a second preset value, and to close when the temperature in the chilled water circulation path is equal to or higher than the second preset value.

[0014] In some embodiments,

[0015] The first fluid circulation component includes a first pump, the first pump is configured to be turned on when the chiller is running, turned on when the chiller stops running and the temperature in the cooling water circulation path is lower than a second preset value, and turned off when the temperature in the cooling water circulation path is equal to or higher than the second preset value; and / or

[0016] The second fluid circulation component includes a second pump, which is configured to start when the chiller is running, to start when the chiller stops running and the temperature in the chilled water circulation path is lower than a second preset value, and to shut down when the temperature in the chilled water circulation path is equal to or higher than the second preset value.

[0017] In some embodiments,

[0018] The first fluid circulation component includes a third switch valve, which is arranged between two connection points of the cooling water circulation path and the first pipeline, and the third switch valve is configured to open when the chiller is running, close when the chiller stops running and the temperature in the cooling water circulation path is lower than a second preset value, and open when the temperature in the cooling water circulation path is equal to or higher than the second preset value; and / or

[0019] The second fluid circulation component includes a fourth switch valve, which is arranged between two connection points between the chilled water circulation path and the second pipeline. The fourth switch valve is configured to open when the chiller is running, close when the chiller stops running and the temperature in the chilled water circulation path is lower than a second preset value, and open when the temperature in the chilled water circulation path is equal to or higher than the second preset value.

[0020] In some embodiments,

[0021] The first fluid circulation component comprises a third pipeline, a fourth pipeline and a cooling tower, the input end of the third pipeline is connected to the condenser, the output end of the third pipeline is connected to the cooling tower, the input end of the fourth pipeline is connected to the cooling tower, and the output end of the fourth pipeline is connected to the condenser; and / or

[0022] The second fluid circulation component includes a fifth pipeline, a sixth pipeline and a terminal device, the input end of the fifth pipeline is connected to the evaporator, the output end of the fifth pipeline is connected to the terminal device, the input end of the sixth pipeline is connected to the terminal device, and the output end of the sixth pipeline is connected to the evaporator.

[0023] In one aspect of the present invention, there is provided a method for preventing freezing of the above-mentioned cold station, which comprises:

[0024] When the chiller is running, the temperature in the water tank is detected. When the temperature in the water tank is lower than a first preset value, the heat storage and release component absorbs and stores heat in the cooling water circulation path through the water tank;

[0025] When the chiller stops running, the temperature in the cooling water circulation path and the temperature in the chilled water circulation path are detected. When the temperature in the chilled water circulation path and / or the cooling water circulation path is lower than a second preset value, heat is released to the chilled water circulation path and / or the cooling water circulation path through the heat storage and release component.

[0026] In some embodiments, the antifreeze method of the cold station also includes: when the chiller is running, detecting the temperature in the water tank, when the temperature in the water tank is equal to or higher than a first preset value, the heat storage and release component stops absorbing and storing heat in the cooling water circulation path.

[0027] In some embodiments, the antifreeze method of the cold station also includes: when the chiller stops running, detecting the temperature in the cooling water circulation path and the temperature in the chilled water circulation path, and when the temperature in the cooling water circulation path and the temperature in the chilled water circulation path are both equal to or higher than a second preset value, the heat storage and release component stops releasing heat to the chilled water circulation path and the cooling water circulation path.

[0028] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0029] In some embodiments, the cold station includes a chiller, a first fluid circulation component, a second fluid circulation component, and a heat storage and release component. When the chiller is running, the heat storage and release component absorbs and stores heat from the cooling water circulation path through a water tank; when the chiller is shut down, the heat storage and release component releases heat to at least one of the pipes in the freezing water circulation path and the cooling water circulation path through the water tank to prevent the water inside the pipe from freezing. The water tank has the functions of recovering heat and releasing heat to prevent the pipe from freezing, so that the cold station does not need to add additional heating equipment such as electric heating, and can avoid the problem that the working medium water in the pipe freezes due to the influence of the external low temperature environment after the chiller is shut down, which makes the chiller unable to operate, and has an energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A partial structural schematic diagram of a cold station provided according to some embodiments of the present invention;

[0032] Figure 2 A schematic diagram of a process of absorbing and storing heat in a cold station according to some embodiments of the present invention;

[0033] Figure 3 The present invention is a schematic diagram of a process for preventing freezing of cold station pipelines according to some embodiments of the present invention.

[0034] The reference numerals in the accompanying drawings are described as follows:

[0035] 1-first fluid circulation component; 11-first pump; 12-third switch valve; 13-third pipeline; 14-fourth pipeline; 15-cooling tower; 16-second temperature sensor;

[0036] 2-second fluid circulation component; 21-second pump; 22-fourth switch valve; 23-fifth pipeline; 24-sixth pipeline; 25-terminal equipment; 26-third temperature sensor;

[0037] 3-heat storage and release component; 31-water tank; 32-first pipeline; 33-second pipeline; 34-first switch valve; 35-second switch valve; 36-first temperature sensor;

[0038] 4- chiller; 41- condenser; 42- evaporator.

[0039] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0041] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] In the present invention, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0043] All terms (including technical terms or scientific terms) used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0044] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0045] Figure 1 Schematic diagram of some embodiments of the cold station according to the present invention. Figure 1 In some embodiments, the cold station includes a chiller 4, a first fluid circulation component 1, a second fluid circulation component 2 and a heat storage and release component 3.

[0046] The chiller 4 includes a condenser 41 and an evaporator 42. The chiller 4 also includes a compressor (not shown in the figure), etc. The connection between the compressor, the condenser 41 and the evaporator 42 in the chiller 4 is realized by using relevant existing technologies, which will not be described in detail here.

[0047] The first fluid circulation module 1 and the condenser 41 form a cooling water circulation path.

[0048] The second fluid circulation component 2 and the evaporator 42 form a chilled water circulation path.

[0049] The heat storage and release assembly 3 includes a water tank 31, a first pipeline 32, and a second pipeline 33. The water tank 31 is configured to keep the water pre-placed therein warm. Both ends of the first pipeline 32 are respectively connected to the cooling water circulation path, and a portion between the two ends of the first pipeline 32 is disposed in the water tank 31. Both ends of the second pipeline 33 are respectively connected to the chilled water circulation path, and a portion between the two ends of the second pipeline 33 is disposed in the water tank 31.

[0050] Among them, the heat storage and release component 3 is configured to absorb and store heat in the cooling water circulation path through the water tank 31 when the chiller 4 is running, and release heat to at least one of the refrigerated water circulation path and the cooling water circulation path through the water tank 31 when the chiller 4 stops running.

[0051] That is to say, the heat storage and release component 3 is configured to release heat only to the chilled water circulation path through the water tank 31 when the chiller 4 stops running, or to release heat only to the cooling water circulation path through the water tank 31, or to release heat to both the chilled water circulation path and the cooling water circulation path through the water tank 31.

[0052] When the chiller 4 is running, the heat storage and release component 3 absorbs and stores heat in the cooling water circulation path through the water tank 31. When the chiller 4 is shut down, the heat storage and release component 3 can release heat only to the low-temperature pipeline of the chilled water circulation path through the water tank 31, or can also release heat to the low-temperature pipelines of the chilled water circulation path and the cooling water circulation path at the same time to prevent the water inside the pipeline from freezing. The water tank 31 has the function of recovering the internal heat of the system and releasing heat to prevent the pipeline from freezing, so that the cold station does not need to add additional heating equipment such as electric heating, and can solve the problem that the working medium water in the pipeline freezes due to the influence of the external low temperature environment after the chiller 4 is shut down, and the chiller 4 cannot operate, which has an energy-saving effect.

[0053] In some embodiments, the heat storage and release component 3 includes a first switch valve 34, which is disposed in the first pipeline 32. The first switch valve 34 is configured to open when the chiller 4 is running and the temperature in the water tank 31 is lower than a first preset value, and to close when the temperature in the water tank 31 is equal to or higher than the first preset value. By controlling the switch of the first switch valve 34, it is controlled whether the water tank 31 absorbs and stores the heat in the cooling water circulation path.

[0054] In some embodiments, the first switch valve 34 is further configured to open when the temperature in the cooling water circulation path is lower than a second preset value when the chiller 4 stops running, and close when the temperature in the cooling water circulation path is equal to or higher than the second preset value. By controlling the switch of the first switch valve 34, it is controlled whether the water tank 31 releases heat to the cooling water circulation path.

[0055] In some embodiments, the heat storage and release assembly 3 further includes a second switch valve 35 , which is disposed in the second pipeline 33 , and the second switch valve 35 is configured to be closed when the chiller 4 is in operation.

[0056] In some embodiments, the second switch valve 35 is further configured to open when the temperature in the chilled water circulation path is lower than a second preset value when the chiller 4 stops running, and to close when the temperature in the chilled water circulation path is equal to or higher than the second preset value. By controlling the switch of the second switch valve 35, it is controlled whether the water tank 31 releases heat to the chilled water circulation path.

[0057] In some embodiments, the first fluid circulation component 1 includes a first pump 11, which is configured to be turned on when the chiller 4 is running, turned on when the chiller 4 stops running and the temperature in the cooling water circulation path is lower than a second preset value, and turned off when the temperature in the cooling water circulation path is equal to or higher than the second preset value. The first pump 11 is used to provide power to make the cooling water flow in the cooling water circulation path.

[0058] In some embodiments, the second fluid circulation component 2 includes a second pump 21, which is configured to be turned on when the chiller 4 is running, turned on when the chiller 4 stops running and the temperature in the chilled water circulation path is lower than a second preset value, and turned off when the temperature in the chilled water circulation path is equal to or higher than the second preset value. The second pump 21 is used to provide power to make the chilled water flow in the chilled water circulation path.

[0059] In some embodiments, the first fluid circulation component 1 includes a third switch valve 12, which is arranged between two connection points of the cooling water circulation path and the first pipeline 32. The third switch valve 12 is configured to open when the chiller 4 is running, close when the chiller 4 stops running and the temperature in the cooling water circulation path is lower than a second preset value, and open when the temperature in the cooling water circulation path is equal to or higher than the second preset value.

[0060] In some embodiments, the second fluid circulation component 2 includes a fourth switch valve 22, which is arranged between two connection points between the chilled water circulation path and the second pipeline 33. The fourth switch valve 22 is configured to open when the chiller 4 is running, close when the chiller 4 stops running and the temperature in the chilled water circulation path is lower than the second preset value, and open when the temperature in the chilled water circulation path is equal to or higher than the second preset value.

[0061] In some embodiments, the first fluid circulation component 1 includes a third pipeline 13, a fourth pipeline 14 and a cooling tower 15, the input end of the third pipeline 13 is connected to the condenser 41, the output end of the third pipeline 13 is connected to the cooling tower 15, the input end of the fourth pipeline 14 is connected to the cooling tower 15, and the output end of the fourth pipeline 14 is connected to the condenser 41.

[0062] During the operation of the chiller 4, the temperature of the cooling water in the cooling water circulation path is relatively high. When the temperature in the water tank 31 is lower than the first preset value, the cooling water in the cooling water circulation path flows through the water tank 31, and the cooling water transfers heat with the water in the water tank 31. The heat storage and release component 3 absorbs and stores the heat in the cooling water circulation path through the water tank 31. In this process, the water in the water tank 31 is also used to cool the cooling water in the cooling water circulation path once, thereby reducing the temperature of the cooling water. The cooling water in the cooling water circulation path is also cooled twice through the cooling tower 15, thereby improving the cooling efficiency of the cooling water.

[0063] During the operation of the chiller 4 , the water discharged from the condenser 41 first passes through the water tank 31 for primary cooling, and then passes through the cooling tower 15 for secondary cooling, thereby improving the energy efficiency of the chiller 4 .

[0064] In some embodiments, the second fluid circulation component 2 includes a fifth pipeline 23, a sixth pipeline 24 and a terminal device 25, the input end of the fifth pipeline 23 is connected to the evaporator 42, the output end of the fifth pipeline 23 is connected to the terminal device 25, the input end of the sixth pipeline 24 is connected to the terminal device 25, and the output end of the sixth pipeline 24 is connected to the evaporator 42.

[0065] Some embodiments further provide a method for preventing freezing of the cold station, which comprises:

[0066] When the chiller 4 is running, the temperature in the water tank 31 is detected. When the temperature in the water tank 31 is lower than a first preset value, the heat storage and release component 3 absorbs and stores heat in the cooling water circulation path through the water in the water tank 31 .

[0067] When the chiller 4 stops running, the temperature in the cooling water circulation path and the temperature in the chilled water circulation path are detected. When the temperature in the chilled water circulation path and / or the cooling water circulation path is lower than a second preset value, heat is released to the chilled water circulation path and / or the cooling water circulation path through the heat storage and release component 3.

[0068] Specifically: when only the temperature in the chilled water circulation path is lower than the second preset value, the heat storage and release component 3 only releases heat to the chilled water circulation path; or, when only the temperature in the cooling water circulation path is lower than the second preset value, the heat storage and release component 3 only releases heat to the cooling water circulation path; or, when both the temperature in the cooling water circulation path and the temperature in the chilled water circulation path are lower than the second preset value, the heat storage and release component 3 releases heat to both the chilled water circulation path and the cooling water circulation path.

[0069] In some embodiments, the antifreeze method of the cold station also includes: when the chiller 4 is running, detecting the temperature in the water tank 31, when the temperature in the water tank 31 is equal to or higher than a first preset value, the heat storage and release component 3 stops absorbing and storing heat in the cooling water circulation path.

[0070] In some embodiments, the antifreeze method of the cold station also includes: when the chiller 4 stops running, detecting the temperature in the cooling water circulation path and the temperature in the freezing water circulation path, and when the temperature in the cooling water circulation path and the temperature in the freezing water circulation path are equal to or higher than the second preset value, the heat storage and release component 3 stops releasing heat to the freezing water circulation path and the cooling water circulation path.

[0071] like Figure 1 As shown, in some preferred or optional embodiments, the cold station includes a chiller 4, a first fluid circulation component 1, a second fluid circulation component 2 and a heat storage and release component 3.

[0072] The chiller 4 includes a condenser 41, an evaporator 42, and a compressor (not shown in the figure). The chiller 4 is configured to form a refrigerant circulation path. The connection of each component in the chiller 4 can be achieved by using relevant existing technologies, which will not be repeated here.

[0073] The first fluid circulation assembly 1 includes a first pump 11 , a third throttle valve 12 , a third pipeline 13 , a fourth pipeline 14 , a cooling tower 15 and a second temperature sensor 16 .

[0074] The input end of the third pipeline 13 is connected to the condenser 41, and the output end of the third pipeline 13 is connected to the cooling tower 15. The input end of the fourth pipeline 14 is connected to the cooling tower 15, and the output end of the fourth pipeline 14 is connected to the condenser 41. The first pump 11 is provided in the fourth pipeline 14. The third throttle valve 12 and the second temperature sensor 16 are provided in the third pipeline 13. The second temperature sensor 16 is close to the input end of the third pipeline 13 and is used to detect the temperature in the third pipeline 13.

[0075] The second fluid circulation component 2 includes a second pump 21 , a fourth switch valve 22 , a fifth pipeline 23 , a sixth pipeline 24 , a terminal device 25 and a third temperature sensor 26 .

[0076] The input end of the fifth pipeline 23 is connected to the evaporator 42, and the output end of the fifth pipeline 23 is connected to the terminal device 25. The input end of the sixth pipeline 24 is connected to the terminal device 25, and the output end of the sixth pipeline 24 is connected to the evaporator 42. The second pump 21 and the third temperature sensor 26 are arranged in the sixth pipeline 24. The third temperature sensor 26 is close to the input end of the sixth pipeline 24, and is used to detect the temperature in the sixth pipeline 24. The fourth throttle valve 22 is arranged in the fifth pipeline 23.

[0077] The heat storage and release assembly includes a water tank 31 , a first pipeline 32 , a second pipeline 33 , a first switch valve 34 , a second switch valve 35 and a first temperature sensor 36 .

[0078] The two ends of the first pipeline 32 are respectively connected to the third pipeline 13. The third throttle valve 12 is located between the two connection points of the third pipeline 13 and the first pipeline 32. A portion between the two ends of the first pipeline 32 is disposed in the water tank 31. The first switch valve 34 is disposed in the first pipeline 32, the first switch valve 34 is close to the first end of the first pipeline 32, and the first end of the first pipeline 32 is located upstream of the second end of the first pipeline 32.

[0079] The two ends of the second pipeline 33 are respectively connected to the fifth pipeline 23. The fourth switch valve 22 is located between the two connection points of the fifth pipeline 23 and the second pipeline 33. Part of the second pipeline 33 between the two ends is arranged in the water tank 31. The second switch valve 35 is arranged in the second pipeline 33, and the second switch valve 35 is close to the first end of the second pipeline 33, and the first end of the second pipeline 33 is located upstream of the second end of the second pipeline 33.

[0080] The first temperature sensor 36 is disposed in the water tank 31 and is used to detect the temperature in the water tank 31 .

[0081] When chiller 4 is running (reference Figure 2 ):

[0082] The first pump 11 and the second pump 12 are started, the third on-off valve 12 and the fourth on-off valve 22 are opened, and the second on-off valve 35 is closed.

[0083] The temperature T of the water tank 31 is detected by the first temperature sensor 36, and the temperature T of the water tank 31 is compared with the first preset temperature Ta. When the temperature T of the water tank 31 is lower than the first preset temperature Ta, the first switch valve 34 is opened, so that the cooling water in the third pipeline 13 in the cooling water circulation path passes through the first pipeline 32, and the cooling water in the first pipeline 32 exchanges heat with the water in the water tank 31, thereby increasing the water temperature in the water tank 31, and absorbing and storing heat through the water in the water tank 31. When the temperature T of the water tank 31 is equal to or greater than the first preset temperature Ta, the first switch valve 34 is closed.

[0084] When chiller 4 is shut down (reference Figure 3 ):

[0085] The temperature T1 in the third pipe 13 in the cooling water circulation path is detected by the second temperature sensor 16, and the temperature T2 in the sixth pipe 24 in the chilled water circulation path is detected by the third temperature sensor 26, and the temperatures T1 and T2 are compared with the second preset temperature Tb.

[0086] When temperature T1 and temperature T2 are both lower than the second preset temperature Tb, the first switch valve 34, the second switch valve 35, the first pump 11, and the second pump 21 are opened; the third switch valve 12 and the fourth switch valve 22 are closed; the first pump 11 and the second pump 21 provide power, so that the cooling water in the cooling water circulation path circulates through the first pipeline 32, and the chilled water in the chilled water circulation path circulates through the second pipeline 22, the cooling water exchanges heat with the water in the water tank 31 in the first pipeline 32, and the chilled water exchanges heat with the water in the water tank 31 in the second pipeline 33, thereby realizing heat release from the water tank 31, increasing the temperature in the cooling water circulation path and the chilled water circulation path, and preventing the pipelines from freezing.

[0087] When the temperature T1 and the temperature T2 are both equal to or higher than the second preset temperature Tb, the third switch valve 12 and the fourth switch valve 22 are opened, and the first switch valve 34, the second switch valve 35, the first pump 11, and the second pump 21 are closed.

[0088] When one of the temperature T1 and the temperature T2 is lower than the second preset temperature Tb, generally, the temperature T1 is equal to or higher than the second preset temperature Tb, and the temperature T2 is lower than the second preset temperature Tb. At this time, the second switch valve 35 and the second pump 21 are opened; the fourth switch valve 22 is closed; the chilled water in the chilled water circulation path circulates through the second pipeline 22, and the chilled water exchanges heat with the water in the water tank 31 in the second pipeline 33, thereby achieving heat release from the water tank 31, increasing the temperature in the chilled water circulation path, and preventing the pipeline from freezing. In the above process, the first pump 11, the first switch valve 34, and the third switch valve 12 are closed.

[0089] After the chiller 4 is shut down, the pipes may freeze due to the low ambient temperature, and the water tank 31 has an insulation function, which can keep the water in the water tank 31 at a constant temperature. Therefore, after the chiller 4 is shut down, the water tank 31 can release heat to increase the temperature in the cooling water circulation path and the chilled water circulation path to prevent the pipes from freezing.

[0090] The second preset temperature Tb is selected based on the freezing temperature of the pipeline. The second preset temperature Tb is generally greater than the freezing temperature of the pipeline and less than the temperature in the water tank 31.

[0091] The first preset temperature Ta is lower than the water temperature of the cooling water coming out of the condenser 41 when the chiller 4 is in operation. The first preset temperature Ta is higher than the second preset temperature Tb.

[0092] In some embodiments, when the chiller 4 is in operation, the temperature of the cooling water discharged from the condenser 41 is high, and when passing through the water tank 31, the water in the water tank 31 can be heated. Since the water tank 31 has a heat preservation function, the heat in the cooling water circulation path can be recovered and stored. When the chiller 4 is shut down, if the ambient temperature is low and there is a situation where the pipes are frozen, the heat stored in the water tank 31 can be used to heat the cooling water circulation path and the chilled water circulation path to prevent the pipes from freezing; there is no need to add other auxiliary equipment for additional heating, which has the beneficial effect of energy saving and emission reduction.

[0093] Based on the above-mentioned embodiments of the present invention, unless explicitly denied, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0094] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A cold station, characterized in that: include: A chiller (4), comprising a condenser (41) and an evaporator (42); A first fluid circulation component (1) and the condenser (41) form a cooling water circulation path; A second fluid circulation component (2) forms a chilled water circulation path with the evaporator (42); as well as A heat storage and release component (3), comprising a water tank (31), a first pipeline (32) and a second pipeline (33); the water tank (31) is configured to keep water pre-placed therein warm; both ends of the first pipeline (32) are respectively connected to the cooling water circulation path, and a portion between the two ends of the first pipeline (32) is disposed in the water tank (31); both ends of the second pipeline (33) are respectively connected to the freezing water circulation path, and a portion between the two ends of the second pipeline (33) is disposed in the water tank (31); The heat storage and release component (3) is configured to absorb and store heat in the cooling water circulation path through the water tank (31) when the chiller (4) is in operation, and to release heat to at least one of the refrigerated water circulation path and the cooling water circulation path through the water tank (31) when the chiller (4) stops operating, so as to prevent the pipes from freezing; The heat storage and release component (3) comprises a first switch valve (34), the first switch valve (34) being arranged in the first pipeline (32), the first switch valve (34) being configured to open when the water chiller (4) is in operation and the temperature in the water tank (31) is lower than a first preset value, and to close when the temperature in the water tank (31) is equal to or higher than the first preset value; The first switch valve (34) is further configured to open when the temperature in the cooling water circulation path is lower than a second preset value when the chiller (4) stops operating, and to close when the temperature in the cooling water circulation path is equal to or higher than the second preset value; The heat storage and release component (3) further comprises a second switch valve (35), the second switch valve (35) being arranged on the second pipeline (33), the second switch valve (35) being configured to be closed when the chiller (4) is in operation; The second switch valve (35) is also configured to open when the chiller (4) stops operating and the temperature in the chilled water circulation path is lower than a second preset value, and to close when the temperature in the chilled water circulation path is equal to or higher than the second preset value.

2. The cooling station according to claim 1, characterized in that: The first fluid circulation component (1) comprises a first pump (11), the first pump (11) being configured to be turned on when the chiller (4) is in operation, turned on when the chiller (4) is stopped and when the temperature in the cooling water circulation path is lower than a second preset value, and turned off when the temperature in the cooling water circulation path is equal to or higher than the second preset value; and / or The second fluid circulation component (2) comprises a second pump (21), the second pump (21) being configured to be turned on when the chiller (4) is in operation, turned on when the chiller (4) is stopped and when the temperature in the chilled water circulation path is lower than a second preset value, and turned off when the temperature in the chilled water circulation path is equal to or higher than the second preset value.

3. The cold station according to claim 1 or 2, characterized in that: The first fluid circulation component (1) comprises a third switch valve (12), the third switch valve (12) being arranged between two connection points of the cooling water circulation path and the first pipeline (32), the third switch valve (12) being configured to open when the chiller (4) is in operation, close when the chiller (4) stops operating and when the temperature in the cooling water circulation path is lower than a second preset value, and open when the temperature in the cooling water circulation path is equal to or higher than the second preset value; and / or The second fluid circulation component (2) comprises a fourth switch valve (22), the fourth switch valve (22) being arranged between two connection points of the chilled water circulation path and the second pipeline (33), the fourth switch valve (22) being configured to open when the chiller (4) is in operation, close when the chiller (4) stops operating and when the temperature in the chilled water circulation path is lower than a second preset value, and open when the temperature in the chilled water circulation path is equal to or higher than the second preset value.

4. The cooling station according to claim 1, characterized in that: The first fluid circulation component (1) comprises a third pipeline (13), a fourth pipeline (14) and a cooling tower (15), the input end of the third pipeline (13) is connected to the condenser (41), the output end of the third pipeline (13) is connected to the cooling tower (15), the input end of the fourth pipeline (14) is connected to the cooling tower (15), and the output end of the fourth pipeline (14) is connected to the condenser (41); and / or The second fluid circulation component (2) comprises a fifth pipeline (23), a sixth pipeline (24) and a terminal device (25); the input end of the fifth pipeline (23) is connected to the evaporator (42), the output end of the fifth pipeline (23) is connected to the terminal device (25), the input end of the sixth pipeline (24) is connected to the terminal device (25), and the output end of the sixth pipeline (24) is connected to the evaporator (42).

5. A method for preventing freezing of a cold station according to any one of claims 1 to 4, comprising: When the chiller (4) is in operation, the temperature in the water tank (31) is detected; when the temperature in the water tank (31) is lower than a first preset value, the heat storage and release component (3) absorbs and stores heat in the cooling water circulation path through the water tank (31); When the chiller (4) stops running, the temperature in the cooling water circulation path and the temperature in the freezing water circulation path are detected, and when the temperature in the freezing water circulation path and / or the cooling water circulation path is lower than a second preset value, heat is released to the freezing water circulation path and / or the cooling water circulation path through the heat storage and release component (3).

6. The antifreeze method of a cold station according to claim 5, further comprising: When the chiller (4) is in operation, the temperature in the water tank (31) is detected, and when the temperature in the water tank (31) is equal to or higher than a first preset value, the heat storage and release component (3) stops absorbing and storing heat in the cooling water circulation path.

7. The antifreeze method of a cold station according to claim 5, further comprising: When the chiller (4) stops running, the temperature in the cooling water circulation path and the temperature in the freezing water circulation path are detected, and when the temperature in the cooling water circulation path and the temperature in the freezing water circulation path are both equal to or higher than a second preset value, the heat storage and release component (3) stops releasing heat to the freezing water circulation path and the cooling water circulation path.

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