Chilled water unit with cold storage function and method for cold storage

Abstract

The application relates to the technical field of cold storage, and discloses a cold water unit capable of storing cold and a cold storage method thereof, wherein the cold storage method comprises the following steps: when the working mode of the cold water unit is a cold storage mode, the refrigeration unit and the cold storage pipeline part are controlled to start working; real-time third temperature information fed back by a third temperature sensor and a preset cold storage temperature range are acquired; when the third temperature information is within the preset cold storage temperature range, the compressor is controlled to remain in the working state; when the third temperature information is lower than the preset cold storage temperature range, the compressor is controlled to unload; and when the third temperature information is higher than the preset cold storage temperature range, the compressor is controlled to load; according to the method disclosed by the application, when the cold water unit executes the cold storage mode, a large amount of refrigerating capacity is stored in the cold storage tank in cycles; when the cold water unit needs a large amount of refrigerating capacity in a short time or needs a large amount of refrigerating capacity intermittently, a large amount of refrigerating capacity is released from the cold storage tank, so that the use requirement of the cold water unit in special occasions can be met.

Description

Technical Field

[0001] This invention relates to the field of cold storage technology, and in particular to a chiller unit capable of storing cold water and its cold storage method. Background Technology

[0002] Currently, the general-purpose chiller units widely available on the market can effectively achieve the cooling function, providing a continuous and uniform supply of chilled water for environments requiring comfort or process control. These traditional chiller units are generally suitable for situations where the cooling capacity demand is continuous and uniform. However, when faced with uneven cooling capacity demand, such as a large amount of cooling capacity required in a short period of time, or in some intermittent situations requiring a large amount of cooling capacity, these traditional chiller units are inadequate. Because traditional chiller units cannot quickly provide the required large amount of cooling capacity in a short period of time, they cannot meet the needs of situations requiring a large amount of cooling capacity in a short period of time or intermittent large amounts of cooling capacity.

[0003] This limitation means that traditional chiller units often cannot provide sufficient cooling for the rapid and high-heat-dissipation cooling needs of process equipment, thus greatly reducing the reliability of equipment operation. To solve this problem, there is an urgent need in the market for a new type of chiller unit that can flexibly cope with various cooling needs, especially those sudden and intermittent high-load cooling needs, to ensure the stable operation of process equipment and maximize production efficiency.

[0004] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a cold storage method that can provide a large amount of cooling capacity to the terminal when the chiller unit needs a large amount of cooling capacity in a short period of time or intermittently needs a large amount of cooling capacity.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cold storage method includes a cold water chiller unit comprising a cold storage tank, a controller, a cold storage piping section, and a refrigeration unit. The cold storage tank is connected to the refrigeration unit via the cold storage piping section. The cold storage piping section includes a third temperature sensor electrically connected to the controller. The third temperature sensor is disposed on a connection pipe between one output end of the cold storage tank and a second input end of the refrigeration unit. The refrigeration unit includes a compressor electrically connected to the controller. The cold storage method includes the following steps:

[0008] When the chiller unit is in the cold storage mode, the control refrigeration unit and the cold storage pipeline start working.

[0009] Acquire real-time third temperature information fed back by the third temperature sensor, and acquire a preset cold storage temperature range;

[0010] When the third temperature information is within the preset cold storage temperature range, control the compressor to keep the working state unchanged;

[0011] When the third temperature information is lower than the preset cold storage temperature range, control the compressor to unload;

[0012] When the third temperature information is higher than the preset cold storage temperature range, control the compressor to load.

[0013] In the cold storage method, the refrigeration unit further comprises an evaporator, a condenser and a condenser fan electrically connected with the controller, the evaporator, the compressor and the condenser are connected to form a refrigeration cycle; the cold storage pipeline part further comprises a water pump electrically connected with the controller, a second output end of the evaporator is connected with an input end of the cold storage tank through the water pump, and an output end of the cold storage tank is connected with a second input end of the evaporator; when the working mode of the water chiller is the cold storage mode, the refrigeration unit and the cold storage pipeline part are controlled to start working, and the method comprises the following steps:

[0014] When the working mode of the water chiller is the cold storage mode, the water pump is first controlled to start working;

[0015] When the preset buffer time is reached, the condenser fan is controlled to start working, and then the compressor is controlled to start working.

[0016] In the cold storage method, the refrigeration unit further comprises a first pressure sensor electrically connected with the controller, and the first pressure sensor is arranged on a connecting pipeline of the compressor and the condenser; after the refrigeration unit and the cold storage pipeline part are controlled to start working, the method further comprises the following steps:

[0017] Acquire real-time first pressure information fed back by the first pressure sensor, and acquire a preset fan working pressure range;

[0018] When the first pressure information is within the preset fan working pressure range, control the condenser fan to keep the working state unchanged;

[0019] When the first pressure information is lower than the preset fan working pressure range, control the condenser fan to unload;

[0020] When the first pressure information is higher than the preset fan working pressure range, control the condenser fan to load.

[0021] The cold storage method, the refrigeration unit further comprises a bypass pipeline part electrically connected with the controller, one end of the bypass pipeline part is connected with the connecting pipeline of the compressor and the condenser, and the other end of the bypass pipeline part is connected with the first output end of the evaporator; the real-time first pressure information fed back by the first pressure sensor is acquired, and then the method further comprises:

[0022] acquiring a preset bypass working pressure range;

[0023] when the first pressure information is in the preset bypass working pressure range, the working state of the bypass pipeline part is kept unchanged;

[0024] when the first pressure information is lower than the preset bypass working pressure range, the bypass pipeline part starts to work;

[0025] when the first pressure information is higher than the preset bypass working pressure range, the bypass pipeline part stops working.

[0026] The cold storage method, the refrigeration unit further comprises a bypass pipeline part electrically connected with the controller, one end of the bypass pipeline part is connected with the connecting pipeline of the compressor and the condenser, and the other end of the bypass pipeline part is connected with the first output end of the evaporator; the real-time first pressure information fed back by the first pressure sensor is acquired, and then the method further comprises:

[0027] when the flow protector is disconnected, the compressor is stopped, and a flow interruption alarm instruction is output;

[0028] when the flow protector is connected, the real-time fourth temperature information fed back by the fourth temperature sensor is acquired, and a preset protection action temperature and a preset protection reset temperature are acquired;

[0029] when the fourth temperature information is lower than the preset protection action temperature, the compressor is stopped, and a low-temperature alarm instruction is output;

[0030] when the fourth temperature information is greater than or equal to the preset protection reset temperature, the compressor keeps the original working state unchanged, and an alarm reset instruction is output.

[0031] The application also provides a cold water unit with cold storage, which adopts the cold storage method as described above to realize work control.

[0032] In the cold water unit with cold storage, the cold storage pipeline part further comprises a flow protector, a water pump and a fourth temperature sensor, which are electrically connected to the controller respectively; the second output end of the refrigeration unit is connected to the input end of one side of the cold storage tank through the water pump, and the fourth temperature sensor is arranged on the connecting pipeline between the second output end of the refrigeration unit and the water pump; and the flow protector is arranged on the connecting pipeline between the output end of one side of the cold storage tank and the second input end of the refrigeration unit.

[0033] In the cold water unit with cold storage, the refrigeration unit further comprises an evaporator, a condenser, a filter, an expansion valve, a condenser fan, a first pressure sensor, a first temperature sensor, a second pressure sensor and a second temperature sensor, which are electrically connected to the controller; the evaporator, the compressor, the condenser, the filter and the expansion valve are sequentially connected end to end to form a refrigeration cycle; the first temperature sensor and the first pressure sensor are arranged on the connecting pipeline between the compressor and the condenser; and the second temperature sensor and the second pressure sensor are arranged on the connecting pipeline between the evaporator and the compressor.

[0034] In the cold water unit with cold storage, the refrigeration unit further comprises a bypass pipeline part electrically connected to the controller; one end of the bypass pipeline part is connected to the connecting pipeline between the compressor and the condenser, and the other end of the bypass pipeline part is connected to the first output end of the evaporator.

[0035] In the cold water unit with cold storage, a flow distributor and a flow equalizer are arranged in the cold storage tank; the second output end of the evaporator is connected to the flow distributor through the input end of one side of the cold storage tank; and the output end of the flow equalizer is connected to the second input end of the evaporator through the output end of one side of the cold storage tank.

[0036] Advantages:

[0037] The application provides a cold storage method, when a water chiller executes a cold storage mode, a large amount of refrigerating capacity is stored in a cold storage tank through circulation, when the water chiller needs a large amount of refrigerating capacity in a short time or needs a large amount of refrigerating capacity intermittently, a large amount of refrigerating capacity is released from the cold storage tank to meet the use requirement of the water chiller in a special occasion; further, the working state of the compressor is adjusted according to the real-time third temperature information fed back by the third temperature sensor, so that the cold capacity in the cold storage tank can meet the requirement of the cold storage temperature, thereby ensuring the sufficient supply of the cold capacity and meeting the large refrigerating capacity use requirement of the water chiller when executing the refrigerating mode. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 The first logic flow chart of the cold storage method provided by the application is shown in the figure.

[0039] Figure 2 The second logic flow chart of the cold storage method provided by the application is shown in the figure.

[0040] Figure 3 The third logic flow chart of the cold storage method provided by the application is shown in the figure.

[0041] Figure 4 The fourth logic flow chart of the cold storage method provided by the application is shown in the figure.

[0042] Figure 5 The structure schematic diagram of the water chiller capable of cold storage provided by the application is shown in the figure.

[0043] Main element symbol explanation: 1-cold storage tank, 11-diffuser, 12-flow distributor, 21-water pump, 22-flow protector, 23-third temperature sensor, 24-fourth temperature sensor, 301-compressor, 302-condenser, 303-filter, 304-expansion valve, 305-evaporator, 306-condensing fan, 307-first temperature sensor, 308-first pressure sensor, 309-second temperature sensor, 310-second pressure sensor, 311-bypass regulating valve, 312-bypass on-off valve, 313-throttling device, 4-controller. DETAILED DESCRIPTION

[0044] The application provides a water chiller capable of cold storage and a cold storage method thereof, in order to make the purpose, technical scheme and effect of the application more clear and explicit, the application is further described in detail below with reference to the drawings and examples.

[0045] In the description of the application, it should be understood that the terms "mounting", "connection" and the like should be understood in a broad sense, and those skilled in the art can understand the specific meaning of the above terms in the application according to the specific circumstances.

[0046] In the embodiment, the preset cold accumulation temperature range, the preset buffer time, the preset fan reset pressure, the preset bypass action pressure, the preset bypass reset pressure, the preset protection action temperature and the preset protection reset temperature are preset by the staff according to the design parameters and the running environment of the water chiller, and can be modified and set through the display screen panel of the water chiller.

[0047] Referring to Figure 1 and Figure 5 , the application provides a cold accumulation method, and a water chiller capable of accumulating cold includes a cold accumulation tank 1, a controller 4, a cold accumulation pipeline part and a refrigeration unit, the cold accumulation tank 1 is connected with the refrigeration unit through the cold accumulation pipeline part, the cold accumulation pipeline part includes a third temperature sensor 23 electrically connected with the controller 4, the third temperature sensor 23 is arranged on a connecting pipeline between a side output end of the cold accumulation tank 1 and a second input end of the refrigeration unit; the refrigeration unit includes a compressor 301 electrically connected with the controller 4; and the cold accumulation method includes the following steps:

[0048] 101, when the working mode of the water chiller is the cold accumulation mode, the refrigeration unit and the cold accumulation pipeline part are controlled to start working;

[0049] 102, real-time third temperature information fed back by the third temperature sensor 23 is acquired, and a preset cold accumulation temperature range is acquired;

[0050] In the embodiment, the preset cold accumulation temperature range is [preset cold accumulation temperature-preset cold accumulation precision, preset cold accumulation temperature+ preset cold accumulation precision].

[0051] 103, when the third temperature information is within the preset cold accumulation temperature range, the working state of the compressor 301 is controlled to remain unchanged;

[0052] 104, when the third temperature information is lower than the preset cold accumulation temperature range, the compressor 301 is controlled to unload;

[0053] 105, when the third temperature information is higher than the preset cold accumulation temperature range, the compressor 301 is controlled to load;

[0054] In the embodiment, when the third temperature information is greater than the preset cold accumulation temperature+ preset cold accumulation precision, the compressor 301 is controlled to load, so as to increase the refrigeration intensity, rapidly adjust the temperature back to the cold accumulation temperature range; on the contrary, when the third temperature information is less than the preset cold accumulation temperature- preset cold accumulation precision, the compressor 301 is controlled to unload, so as to reduce the output of the refrigeration, avoid excessive cooling, and ensure that the cold accumulation temperature in the cold accumulation tank 1 remains within the preset cold accumulation temperature range.

[0055] The application discloses a cold storage method, when a water chilling unit executes a cold storage mode, a large amount of refrigerating capacity is stored in a cold storage tank 1 through circulation, when the water chilling unit needs a large amount of refrigerating capacity in a short time or intermittently, a large amount of refrigerating capacity is released from the cold storage tank 1 to meet the use requirement of the water chilling unit in a special occasion; further, the working state of a compressor 301 is adjusted according to the real-time third temperature information fed back by a third temperature sensor 23, so that the cold capacity in the cold storage tank 1 can meet the requirement of the cold storage temperature, thereby ensuring sufficient supply of the cold capacity and meeting the large refrigerating capacity use requirement when the water chilling unit executes a refrigerating mode.

[0056] Further, referring to Figure 2 and Figure 5 , the refrigerating unit further comprises an evaporator 305, a condenser 302 and a condensing fan 306 electrically connected with the controller 4, the evaporator 305, the compressor 301 and the condenser 302 are connected to form a refrigerating cycle; the cold storage pipeline part further comprises a water pump 21 electrically connected with the controller 4, a second output end of the evaporator 305 is connected with an input end of the cold storage tank 1 through the water pump 21, and an output end of the cold storage tank 1 is connected with a second input end of the evaporator 305; when the working mode of the water chilling unit is the cold storage mode, the refrigerating unit and the cold storage pipeline part are controlled to start working, and the method comprises the following steps.

[0057] 201, when the working mode of the water chilling unit is the cold storage mode, the water pump 21 is first controlled to start working;

[0058] In the embodiment, the water pump 21 is first controlled to start working, so that a heat exchange cycle is formed between the cold storage tank 1 and the evaporator 305, and sufficient time is provided for the cold storage preparation of the cold storage water chilling unit.

[0059] 202, when the preset buffer time is reached, the condensing fan 306 is controlled to start working, and then the compressor 301 is controlled to start working;

[0060] In the embodiment, the condensing fan 306 and the compressor 301 are controlled to start working in sequence, the timely starting of the condensing fan 306 is helpful to rapidly establish the condensing pressure and create conditions for the efficient working of the compressor 301; specifically, if the compressor 301 is started first, the high-temperature and high-pressure exhaust gas of the compressor 301 cannot be cooled and reduced in pressure in time, because the condensing fan 306 generally needs some time to start, but the high pressure of the compressor 301 rises very quickly, after the compressor 301 is started, the condensing fan 306 is started, at this time, the condensing fan 306 cannot cool the high-pressure exhaust gas of the compressor 301 in time, which will cause the exhaust pressure of the compressor 301 to rise greatly and the high-pressure alarm problem to occur.

[0061] Further, referring to Figure 3 andFigure 5 The refrigeration unit further comprises a first pressure sensor 308 electrically connected to the controller 4, the first pressure sensor 308 being arranged on a connecting pipeline between the compressor 301 and the condenser 302; the refrigeration unit and the cold storage pipeline part are controlled to start working, and then further comprising:

[0062] 301, acquiring real-time first pressure information fed back by the first pressure sensor 308, and acquiring a preset fan working pressure range;

[0063] In this embodiment, the preset fan working pressure range is [preset fan reset pressure-preset reset pressure accuracy, preset fan reset pressure+preset reset pressure accuracy].

[0064] 302, when the first pressure information is within the preset fan working pressure range, the condenser fan 306 is controlled to remain unchanged in the working state;

[0065] 303, when the first pressure information is lower than the preset fan working pressure range, the condenser fan 306 is controlled to be loaded;

[0066] 304, when the first pressure information is higher than the preset fan working pressure range, the condenser fan 306 is controlled to be unloaded;

[0067] In this embodiment, the system pressure is monitored in real time by the first pressure sensor 308, when the pressure is higher than the preset fan working pressure range, the controller 4 automatically instructs the condenser fan 306 to be loaded and run, to ensure that the cold water chiller with cold storage function operates in an efficient state; on the contrary, when the pressure is lower than the preset fan working pressure range, the controller 4 controls the condenser fan 306 to be unloaded, to reduce unnecessary energy consumption. This intelligent adjustment mechanism not only improves the operation efficiency of the cold water chiller with cold storage function, but also prolongs the service life of the condenser fan 306.

[0068] Further, referring to Figure 3 and Figure 5 The refrigeration unit further comprises a bypass pipeline part electrically connected to the controller 4, one end of the bypass pipeline part being connected to a connecting pipeline between the compressor 301 and the condenser 302, and the other end of the bypass pipeline part being connected to a first output end of the evaporator 305; the real-time first pressure information fed back by the first pressure sensor 308 is acquired, and then further comprising:

[0069] 305, acquiring a preset bypass working pressure range;

[0070] In this embodiment, the preset bypass working pressure range is [preset bypass reset pressure-preset bypass pressure accuracy, preset bypass action pressure+preset bypass pressure accuracy].

[0071] 306、when the first pressure information is within the preset bypass working pressure range, control the bypass pipeline part to keep the working state unchanged;

[0072] 307、when the first pressure information is lower than the preset bypass working pressure range, control the bypass pipeline part to start working;

[0073] 308、when the first pressure information is higher than the preset bypass working pressure range, control the bypass pipeline part to stop working.

[0074] For some ambient temperature operation, without the bypass pipeline part, the condenser fan 306 can provide sufficient cooling for the exhaust of the compressor 301, but when the outdoor ambient temperature rises sharply, the cooling effect of the condenser fan 306 will be insufficient, resulting in a sharp rise in the high pressure of the compressor 301, which is prone to high pressure alarm; in the present embodiment, by setting the bypass pipeline part, when the exhaust pressure of the compressor 301 rises sharply and is higher than the preset bypass working pressure range, the bypass pipeline part starts to work, and part of the refrigerant in the high pressure exhaust of the compressor 301 is bypassed into the suction port of the compressor 301 in time, so that even when the ambient temperature is very high and the condenser fan 306 is insufficient, the bypass pipeline part can also be used for pressure relief, thereby ensuring that the compressor 301 can still operate stably and reliably under very high ambient temperature.

[0075] Further, please refer to Figure 4 and Figure 5 , the cold storage pipeline part further comprises a flow protector 22 and a fourth temperature sensor 24 electrically connected with the controller 4 respectively, the fourth temperature sensor 24 is arranged on the connecting pipeline of the second output end of the evaporator 305 and the water pump 21, and the flow protector 22 is arranged on the connecting pipeline of the output end of the cold storage tank 1 and the second input end of the evaporator 305; the control refrigeration unit and the cold storage pipeline part start to work, and then further comprising:

[0076] 401、when the flow protector 22 is disconnected, control the compressor 301 to stop and output a flow interruption alarm instruction;

[0077] In the present embodiment, when the flow protector 22 detects an abnormal situation and is disconnected, the controller 4 will quickly respond, automatically control the compressor 301 to stop, and at the same time output a flow interruption alarm signal, avoiding damage to the equipment caused by flow abnormalities, and also reminding the operator to take corresponding measures through timely alarm, greatly improving the safety performance of the water chiller during operation.

[0078] 402、when the flow protector 22 is connected, acquire the real-time fourth temperature information fed back by the fourth temperature sensor 24, and acquire the preset protection action temperature and the preset protection reset temperature;

[0079] 403、when the fourth temperature information < the preset protection action temperature, the compressor 301 is controlled to stop, and a low temperature alarm instruction is outputted;

[0080] In the embodiment, the fourth temperature sensor 24 is arranged at the second output end of the evaporator 305. After the cold source outputted by the second output port is cooled, the temperature is relatively low. When the water outlet temperature is lower than the preset protection action temperature, the evaporator 305 is extremely easy to freeze. After freezing, the volume is expanded, the evaporator 305 is cracked, and the evaporator 305 is damaged. Therefore, the protection mechanism is arranged for the evaporator 305 according to the fourth temperature information. When the fourth temperature information < the preset protection action temperature, the compressor 301 is controlled to stop, and the refrigeration is stopped to prevent the cold water main machine from being frozen.

[0081] 404、when the fourth temperature information ≥ the preset protection reset temperature, the compressor 301 is controlled to keep the original working state unchanged, and an alarm reset instruction is outputted;

[0082] In the embodiment, when the flow protection device 22 is connected and the fourth temperature information ≥ the preset protection reset temperature, the controller 4 is automatically reset, the original running state of the compressor 301 is kept, and the cold water unit capable of accumulating cold can quickly recover to the normal working state after the temperature returns to normal, unnecessary downtime is avoided, and the working efficiency and the running efficiency of the equipment are improved.

[0083] Please refer to Figure 5 , the application also provides a cold water unit capable of accumulating cold, which adopts the cold accumulation method as described above to realize working control. The cold water unit capable of accumulating cold comprises a cold accumulation tank 1, a controller 4, a cold accumulation pipeline part and a refrigeration unit. One side of the cold accumulation tank 1 is connected with the refrigeration unit through the cold accumulation pipeline part. The cold accumulation pipeline part comprises a third temperature sensor 23 electrically connected with the controller 4. The third temperature sensor 23 is arranged on a connecting pipeline between the one side output end of the cold accumulation tank 1 and the second input end of the refrigeration unit. The other side of the cold accumulation tank 1 is used for delivering the cold source to the terminal. The refrigeration unit comprises a compressor 301 electrically connected with the controller 4.

[0084] In the embodiment, please refer to Figure 5 , the other side of the cold accumulation tank 1 is provided with a cold water supply pipe and a cold water return pipe. The cold water supply pipe and the cold water return pipe are respectively used for connecting the terminal to deliver the cold source to the terminal.

[0085] Further, please refer to Figure 5The cold storage pipeline part further comprises a flow protector 22, a water pump 21 and a fourth temperature sensor 24, which are electrically connected to the controller 4 respectively; the second output end of the refrigeration unit is connected to one side of the input end of the cold storage tank 1 through the water pump 21, and the fourth temperature sensor 24 is arranged on the connecting pipeline between the second output end of the refrigeration unit and the water pump 21; the flow protector 22 is arranged on the connecting pipeline between the one side of the output end of the cold storage tank 1 and the second input end of the refrigeration unit.

[0086] Further, referring to Figure 5 The refrigeration unit further comprises an evaporator 305, a condenser 302, a filter 303, an expansion valve 304, a condenser fan 306, a first pressure sensor 308, a first temperature sensor 307, a second pressure sensor 310 and a second temperature sensor 309, which are electrically connected to the controller 4; the evaporator 305, the compressor 301, the condenser 302, the filter 303 and the expansion valve 304 are sequentially connected in series to form a refrigeration cycle; the first temperature sensor 307 and the first pressure sensor 308 are arranged on the connecting pipeline between the compressor 301 and the condenser 302; the second temperature sensor 309 and the second pressure sensor 310 are arranged on the connecting pipeline between the evaporator 305 and the compressor 301.

[0087] In the embodiment, the first temperature sensor 307 and the first pressure sensor 308 are arranged on the connecting pipeline between the compressor 301 and the condenser 302, which are used to monitor the state of the high-temperature and high-pressure refrigerant discharged from the compressor 301 in real time, so as to ensure that the refrigerant reaches the ideal temperature and pressure before entering the condenser 302; the second temperature sensor 309 and the second pressure sensor 310 are arranged on the connecting pipeline between the evaporator 305 and the compressor 301, which are responsible for monitoring the state of the low-temperature and low-pressure refrigerant returned from the evaporator 305 to the compressor 301, so as to ensure that the refrigerant reaches the appropriate conditions before re-entering the compressor 301.

[0088] Further, referring to Figure 5 The refrigeration unit further comprises a bypass pipeline part, which is electrically connected to the controller 4, one end of the bypass pipeline part is connected to the connecting pipeline between the compressor 301 and the condenser 302, and the other end of the bypass pipeline part is connected to the first output end of the evaporator 305.

[0089] In the embodiment, referring to Figure 5The bypass pipeline part includes a bypass on-off valve 312, a bypass regulating valve 311 and a throttling device 313, one end of the bypass on-off valve 312 is connected with the connecting pipeline of the compressor 301 and the condenser 302, the other end of the bypass on-off valve 312 is connected with the first output end of the evaporator 305 through the bypass regulating valve 311 and the throttling device 313 connected in sequence; when the bypass pipeline part starts to work, the bypass on-off valve 312 is opened to conduct the bypass pipeline, and the bypass regulating valve 311 is opened according to the preset opening degree; when the bypass pipeline part stops working, the bypass on-off valve 312 and the bypass regulating valve 311 are closed to close the bypass pipeline.

[0090] In the embodiment, referring to ​ The evaporator 305 is connected with the condenser 302 through a connecting pipeline, and the connecting pipeline is connected with the bypass pipeline part. The bypass pipeline part includes a bypass on-off valve 312, a bypass regulating valve 311 and a throttling device 313, one end of the bypass on-off valve 312 is connected with the connecting pipeline of the compressor 301 and the condenser 302, the other end of the bypass on-off valve 312 is connected with the first output end of the evaporator 305 through the bypass regulating valve 311 and the throttling device 313 connected in sequence; when the bypass pipeline part starts to work, the bypass on-off valve 312 is opened to conduct the bypass pipeline, and the bypass regulating valve 311 is opened according to the preset opening degree; when the bypass pipeline part stops working, the bypass on-off valve 312 and the bypass regulating valve 311 are closed to close the bypass pipeline.

[0091] In the embodiment, by arranging the flow distributor 11 and the flow equalizer 12 in the cold storage tank 1, the cooling efficiency and performance of the cold water unit with cold storage are significantly improved; first, the introduction of the flow distributor 11 enables the coolant to be evenly distributed in the entire cold storage tank 1, avoiding the problem of uneven cooling effect caused by the accumulation of coolant in some areas. This uniform distribution feature ensures that every corner can be fully cooled, thereby improving the overall cold storage efficiency. Second, the introduction of the flow distributor optimizes the flow path of the coolant, reduces the flow resistance, and further improves the flow efficiency of the coolant. In addition, the flow equalizer 12 connected with the second input end of the evaporator 305 through the side output end of the cold storage tank 1 ensures that the coolant can be uniformly mixed and distributed before returning to the evaporator 305. This uniform flow feature not only improves the utilization efficiency of the coolant, but also ensures that the evaporator 305 can operate in the best state, thereby improving the cold storage effect of the cold water unit with cold storage.

[0092] It can be understood that, for those skilled in the art, equivalent replacements or changes can be made according to the technical solutions and inventive concepts of the present application, and all such changes or replacements shall belong to the protection scope of the present application.

Claims

1. A cold storage method, characterized in that, A chiller unit capable of storing cold water includes a cold storage tank, a controller, a cold storage piping section, and a refrigeration unit. The cold storage tank is connected to the refrigeration unit via the cold storage piping section. The cold storage piping section includes a third temperature sensor electrically connected to the controller. The third temperature sensor is located on the connection pipe between the output end of the cold storage tank and the second input end of the refrigeration unit. The refrigeration unit includes a compressor electrically connected to the controller, an evaporator, a condenser, a condensing fan electrically connected to the controller, and a first pressure sensor. The evaporator, the compressor, and the condenser are connected to form a refrigeration cycle. The cold storage piping section also includes a water pump electrically connected to the controller. The second output end of the evaporator is connected to the input end of the cold storage tank via the water pump. The output end of the cold storage tank is connected to the second input end of the evaporator. The first pressure sensor is located on the connection pipe between the compressor and the condenser. The cold storage method includes the following steps: When the chiller unit is in cold storage mode, the refrigeration unit and cold storage piping are controlled to start working; real-time first pressure information fed back by the first pressure sensor is obtained, and the preset fan working pressure range is obtained; when the first pressure information is within the preset fan working pressure range, the condenser fan is controlled to maintain its working state; when the first pressure information is lower than the preset fan working pressure range, the condenser fan is controlled to unload; when the first pressure information is higher than the preset fan working pressure range, the condenser fan is controlled to load. Obtain real-time third temperature information fed back by the third temperature sensor, and obtain the preset cold storage temperature range; When the third temperature information is within the preset cold storage temperature range, the compressor is controlled to maintain its operating state. When the third temperature information is lower than the preset cold storage temperature range, the compressor is controlled to unload. When the third temperature information is higher than the preset cold storage temperature range, the compressor is controlled to load.

2. The cold storage method according to claim 1, characterized in that, When the chiller unit operates in cold storage mode, the control unit and cold storage piping begin to operate, including: When the chiller unit is in the cold storage mode, the water pump is started first. When the preset buffer time is reached, the condenser fan is controlled to start working, and then the compressor is controlled to start working.

3. The cold storage method according to claim 1, characterized in that, The refrigeration unit further includes a bypass pipeline section electrically connected to the controller, one end of which is connected to the connecting pipeline between the compressor and the condenser, and the other end of which is connected to the first output terminal of the evaporator; after acquiring the real-time first pressure information fed back by the first pressure sensor, the unit further includes: Obtain the preset bypass working pressure range; When the first pressure information is within the preset bypass working pressure range, the bypass pipeline section is controlled to maintain its working state. When the first pressure information is lower than the preset bypass working pressure range, the bypass pipeline section is controlled to start working. When the first pressure reading is higher than the preset bypass working pressure range, the bypass pipeline is controlled to stop working.

4. The cold storage method according to claim 1, characterized in that, The cold storage pipeline section also includes a flow protector and a fourth temperature sensor, which are electrically connected to the controller. The fourth temperature sensor is located on the connection pipeline between the second output end of the evaporator and the water pump, and the flow protector is located on the connection pipeline between the output end of the cold storage box and the second input end of the evaporator. The control refrigeration unit and cold storage pipeline section begin to operate, and then the following is also included: When the flow protector disconnects, it controls the compressor to stop and outputs a flow interruption alarm command; When the flow protector is turned on, it acquires the real-time fourth temperature information fed back by the fourth temperature sensor, and acquires the preset protection action temperature and the preset protection reset temperature. When the fourth temperature information is less than the preset protection action temperature, the compressor is controlled to stop and a low temperature alarm command is output. When the fourth temperature information is greater than or equal to the preset protection reset temperature, the compressor is controlled to maintain its original working state and an alarm reset command is output.

5. A chiller unit capable of storing cold water, characterized in that, The chiller unit capable of storing cold water employs the cold storage method described in any one of claims 1-4 for operation control; the chiller unit capable of storing cold water includes a cold storage tank, a controller, a cold storage pipeline section, and a refrigeration unit; one side of the cold storage tank is connected to the refrigeration unit through the cold storage pipeline section; the cold storage pipeline section includes a third temperature sensor electrically connected to the controller; the third temperature sensor is disposed on the connection pipeline between the output end of one side of the cold storage tank and the second input end of the refrigeration unit; the other side of the cold storage tank is used to deliver a cold source to the terminal; the refrigeration unit includes a compressor electrically connected to the controller.

6. A chiller unit capable of storing cold water according to claim 5, characterized in that, The cold storage pipeline section also includes a flow protector, a water pump, and a fourth temperature sensor, all electrically connected to the controller. The second output terminal of the refrigeration unit is connected to one side input terminal of the cold storage tank via the water pump. The fourth temperature sensor is located on the connection pipeline between the second output terminal of the refrigeration unit and the water pump. The flow protector is located on the connection pipeline between one side output terminal of the cold storage tank and the second input terminal of the refrigeration unit.

7. A chiller unit capable of storing cold water according to claim 5, characterized in that, The refrigeration unit further includes an evaporator, a condenser, a filter, an expansion valve, and a condensing fan, a first pressure sensor, a first temperature sensor, a second pressure sensor, and a second temperature sensor electrically connected to the controller; the evaporator, the compressor, the condenser, the filter, and the expansion valve are connected end to end in sequence to form a refrigeration cycle; the first temperature sensor and the first pressure sensor are disposed on the connecting pipe between the compressor and the condenser; the second temperature sensor and the second pressure sensor are disposed on the connecting pipe between the evaporator and the compressor.

8. A chiller unit capable of storing cold water according to claim 7, characterized in that, The refrigeration unit also includes a bypass pipeline section electrically connected to the controller. One end of the bypass pipeline section is connected to the connecting pipeline between the compressor and the condenser, and the other end of the bypass pipeline section is connected to the first output end of the evaporator.

9. A chiller unit capable of storing cold water according to claim 5, characterized in that, The cold storage box is equipped with a diffuser and a flow equalizer. The second output end of the evaporator is connected to the diffuser through the input end on one side of the cold storage box, and the output end of the flow equalizer is connected to the second input end of the evaporator through the output end on one side of the cold storage box.

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