Cold storage water chilling unit and cold storage method thereof

Abstract

The invention relates to the technical field of cold accumulation, and discloses a cold accumulation water chilling unit and a cold accumulation method thereof, and the cold accumulation method comprises the following steps: when the working mode of the water chilling unit is a cold accumulation mode, controlling a refrigeration unit and a cold accumulation pipeline part to start working; real-time third temperature information fed back by the third temperature sensor and a preset cold storage temperature range are obtained; when the third temperature information is within the preset cold storage temperature range, the compressor is controlled to keep the working state unchanged; when the third temperature information is lower than the preset cold storage temperature range, the compressor is controlled to be unloaded; when the third temperature information is higher than the preset cold storage temperature range, the compressor is controlled to be loaded; according to the method disclosed by the invention, when the water chilling unit executes the cold storage mode, a large amount of refrigerating capacity is circularly stored in the cold storage box, and when the water chilling unit needs a large amount of refrigerating capacity within a short time or intermittently needs the large amount of refrigerating capacity, the large amount of refrigerating capacity is released through the cold storage box, so that the use requirements of the water chilling unit in special occasions are met.

Description

Technical Field

[0001] The present invention relates to the field of cold storage technology, and in particular to a cold storage chiller and a cold storage method thereof. Background Art

[0002] The general chillers that are widely available on the market can effectively realize the refrigeration function and provide continuous and uniform cold water supply for environments that require comfort or process requirements; this type of traditional chiller is generally suitable for occasions where the demand for cooling capacity is continuous and uniform; however, when faced with uneven cooling capacity demand, such as a large amount of cooling capacity is required in a short period of time, or in some occasions where a large amount of cooling capacity is required intermittently, this type of traditional chiller is unable to cope with the situation; since traditional chillers cannot quickly provide the required large amount of cooling capacity in a short period of time, they cannot meet those occasions where there is a demand for a large amount of cooling capacity in a short period of time or a large amount of cooling capacity intermittently.

[0003] This limitation means that traditional chillers are often unable to provide sufficient cooling effect for process equipment with rapid and large heat dissipation, which greatly reduces the reliability of equipment operation. In order to solve this problem, the market urgently needs a new type of chiller that can flexibly respond to 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 can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a cold storage method, which can provide a large amount of cooling capacity to the terminal when the chiller requires a large amount of cooling capacity in a short period of time or intermittently.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A cold storage method, a cold water chiller capable of cold storage comprises a cold storage box, a controller, a cold storage pipeline and a refrigeration unit, the cold storage box is connected to the refrigeration unit through the cold storage pipeline, the cold storage pipeline comprises a third temperature sensor electrically connected to the controller, the third temperature sensor is arranged on a connecting pipeline between an output end on one side of the cold storage box and a second input end of the refrigeration unit; the refrigeration unit comprises a compressor electrically connected to the controller; the cold storage method comprises the steps of:

[0008] When the chiller is in cold storage mode, the refrigeration unit and the cold storage pipeline are controlled to 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, controlling the compressor to maintain the working state unchanged;

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

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

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

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

[0015] When the preset buffer time is reached, the condensing 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 includes a first pressure sensor electrically connected to the controller, and the first pressure sensor is arranged on the connecting pipeline between the compressor and the condenser; the control refrigeration unit and the cold storage pipeline part start working, and then further includes:

[0017] Obtaining real-time first pressure information fed back by the first pressure sensor, and obtaining a preset fan operating pressure range;

[0018] When the first pressure information is within the preset fan operating pressure range, the condensing fan is controlled to maintain the working state unchanged;

[0019] When the first pressure information is lower than the preset fan operating pressure range, the condensing fan is controlled to unload;

[0020] When the first pressure information is higher than a preset fan operating pressure range, the condensing fan is controlled to load.

[0021] In the cold storage method, the refrigeration unit further includes a bypass pipeline portion electrically connected to the controller, one end of the bypass pipeline portion is connected to the connecting pipeline of the compressor and the condenser, and the other end of the bypass pipeline portion is connected to the first output end of the evaporator; the real-time first pressure information fed back by the first pressure sensor is obtained, and then the following is further included:

[0022] Obtain the preset bypass working pressure range;

[0023] When the first pressure information is within a preset bypass working pressure range, the bypass pipeline section is controlled to maintain a working state unchanged;

[0024] When the first pressure information is lower than the preset bypass working pressure range, the bypass pipeline part is controlled to start working;

[0025] When the first pressure information is higher than a preset bypass working pressure range, the bypass pipeline section is controlled to stop working.

[0026] In the cold storage method, the cold storage pipeline unit further includes a flow protector and a fourth temperature sensor electrically connected to the controller respectively, the fourth temperature sensor is arranged on the connecting pipeline between the second output end of the evaporator and the water pump, and the flow protector is arranged on the connecting pipeline between the output end of the cold storage tank and the second input end of the evaporator; the control refrigeration unit and the cold storage pipeline unit start working, and then further includes:

[0027] When the flow protector is disconnected, the compressor is controlled to stop and a flow cut-off alarm instruction is output;

[0028] When the flow protector is turned on, real-time fourth temperature information fed back by the fourth temperature sensor is obtained, and a preset protection action temperature and a preset protection reset temperature are obtained;

[0029] When the fourth temperature information is less than the preset protection action temperature, the compressor is controlled to stop 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 is controlled to maintain the original working state unchanged, and an alarm reset instruction is output.

[0031] The present invention also correspondingly provides a cold-storage chiller, which adopts any of the cold-storage methods as described above to realize working control; the cold-storage chiller includes a cold storage box, a controller, a cold storage pipeline part and a refrigeration unit, one side of the cold storage box is connected to the refrigeration unit through the cold storage pipeline part, the cold storage pipeline part includes a third temperature sensor electrically connected to the controller, and the third temperature sensor is arranged on the connecting pipeline between the output end of one side of the cold storage box and the second input end of the refrigeration unit; the other side of the cold storage box is used to transport the cold source to the end; the refrigeration unit includes a compressor electrically connected to the controller.

[0032] In the cold water storage chiller, the cold storage pipeline portion also includes 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 on 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; the flow protector is arranged on the connecting pipeline between the output end on one side of the cold storage tank and the second input end of the refrigeration unit.

[0033] In the cold water storage chiller, the refrigeration unit also includes an evaporator, a condenser, a filter, an expansion valve, a condensing fan electrically connected to the controller, a first pressure sensor, a first temperature sensor, a second pressure sensor and a second temperature sensor; 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 arranged on the connecting pipeline between the compressor and the condenser; 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 storage chiller, the refrigeration unit further comprises a bypass pipeline portion electrically connected to the controller, one end of the bypass pipeline portion is connected to the connecting pipeline between the compressor and the condenser, and the other end of the bypass pipeline portion is connected to the first output end of the evaporator.

[0035] In the cold-storage chiller, a diffuser and a flow equalizer are provided in the cold storage box, the second output end of the evaporator is connected to the diffuser through an 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 an output end on one side of the cold storage box.

[0036] Beneficial effects:

[0037] The present invention provides a cold storage method. When a chiller executes a cold storage mode, a large amount of cooling capacity is stored in a cold storage box through circulation. When the chiller requires a large amount of cooling capacity in a short period of time or intermittently requires a large amount of cooling capacity, a large amount of cooling capacity is released through the cold storage box to meet the use requirements of the chiller in special occasions. Furthermore, the working state of the compressor is adjusted according to the real-time third temperature information fed back by the third temperature sensor to ensure that the cooling capacity in the cold storage box can meet the cold storage temperature requirement, thereby ensuring sufficient supply of cooling capacity and meeting the large cooling capacity usage requirement when the chiller executes the cooling mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A first logic flow chart of the cold storage method provided by the present invention;

[0039] Figure 2 A second logic flow chart of the cold storage method provided by the present invention;

[0040] Figure 3 A third logic flow chart of the cold storage method provided by the present invention;

[0041] Figure 4 A fourth logic flow chart of the cold storage method provided by the present invention;

[0042] Figure 5 A schematic structural diagram of a cold water chiller capable of storing cold provided by the present invention.

[0043] Explanation of main component symbols: 1-cold storage box, 11-diffuser, 12-flow equalizer, 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 present invention provides a cold water chiller capable of storing cold and a cold storage method thereof. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples.

[0045] In the description of the present invention, it should be understood that the terms "installation", "connection" and the like should be understood in a broad sense, and a person skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0046] In this embodiment, the preset cold storage 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 pre-set by the staff according to the design parameters and operating environment of the chiller, and can be modified and set through the display screen panel of the chiller.

[0047] See also Figure 1 and Figure 5 The present invention provides a cold storage method. The cold water chiller capable of cold storage comprises a cold storage tank 1, a controller 4, a cold storage pipeline part and a refrigeration unit. The cold storage tank 1 is connected to the refrigeration unit through the cold storage pipeline part. The cold storage pipeline part comprises a third temperature sensor 23 electrically connected to the controller 4. The third temperature sensor 23 is arranged on a connecting pipeline between an output end of one side of the cold storage tank 1 and a second input end of the refrigeration unit; the refrigeration unit comprises a compressor 301 electrically connected to the controller 4; the cold storage method comprises the steps of:

[0048] 101. When the working mode of the chiller is the cold storage mode, the refrigeration unit and the cold storage pipeline are controlled to start working;

[0049] 102. Obtaining real-time third temperature information fed back by the third temperature sensor 23, and obtaining a preset cold storage temperature range;

[0050] In this embodiment, the preset cold storage temperature range is [preset cold storage temperature-preset cold storage accuracy, preset cold storage temperature+preset cold storage accuracy].

[0051] 103. When the third temperature information is within the preset cold storage temperature range, the compressor 301 is controlled to maintain the working state unchanged;

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

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

[0054] In this embodiment, when the third temperature information is greater than the preset cold storage temperature + the preset cold storage accuracy, the compressor 301 is controlled to load to increase the cooling intensity and quickly adjust the temperature back to the cold storage temperature range; on the contrary, when the third temperature information is less than the preset cold storage temperature - the preset cold storage accuracy, the compressor 301 is controlled to unload, reduce the cooling output, avoid overcooling, and ensure that the cold storage temperature in the cold storage box 1 remains within the preset cold storage temperature range.

[0055] The present invention discloses a cold storage method. When a chiller executes a cold storage mode, a large amount of cooling capacity is stored in a cold storage box 1 through circulation. When the chiller requires a large amount of cooling capacity in a short period of time or intermittently requires a large amount of cooling capacity, a large amount of cooling capacity is released through the cold storage box 1 to meet the use requirements of the chiller in special occasions. Furthermore, the working state of the compressor 301 is adjusted according to the real-time third temperature information fed back by the third temperature sensor 23 to ensure that the cooling capacity in the cold storage box 1 can meet the cold storage temperature requirement, thereby ensuring sufficient supply of cooling capacity and meeting the large cooling capacity usage requirement when the chiller executes the cooling mode.

[0056] For further information, see Figure 2 and Figure 5 The refrigeration unit further includes an evaporator 305, a condenser 302, and a condensing fan 306 electrically connected to the controller 4. The evaporator 305, the compressor 301, and the condenser 302 are connected to form a refrigeration cycle; the cold storage pipeline portion further includes a water pump 21 electrically connected to the controller 4, the second output end of the evaporator 305 is connected to the input end of the cold storage tank 1 through the water pump 21, and the output end of the cold storage tank 1 is connected to the second input end of the evaporator 305; when the working mode of the chiller is the cold storage mode, the refrigeration unit and the cold storage pipeline portion are controlled to start working, including:

[0057] 201. When the working mode of the chiller is the cold storage mode, the water pump 21 is controlled to start working;

[0058] In this 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, which provides sufficient time for the cold storage preparation of the cold water unit capable of cold storage.

[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 this embodiment, the condensing fan 306 and the compressor 301 are controlled to start in sequence. The timely start of the condensing fan 306 helps to quickly build up the condensing pressure, creating conditions for the efficient operation of the compressor 301. Specifically, if the compressor 301 is turned on first, there will be a problem that the high-temperature and high-pressure exhaust gas of the compressor 301 cannot be cooled down and reduced in pressure in time after it comes out, because the condensing fan 306 generally takes some time to start, but the high pressure of the compressor 301 increases very quickly. After the compressor 301 is started, the condensing fan 306 is turned on again. At this time, the condensing fan 306 has no time to cool the high-pressure exhaust gas of the compressor 301, which will cause the exhaust pressure of the compressor 301 to rise sharply, and a high-pressure alarm problem will occur.

[0061] For further information, see Figure 3 and Figure 5 The refrigeration unit further includes a first pressure sensor 308 electrically connected to the controller 4, and the first pressure sensor 308 is arranged on the connecting pipeline between the compressor 301 and the condenser 302; the control refrigeration unit and the cold storage pipeline part start working, and then further includes:

[0062] 301. Obtaining real-time first pressure information fed back by the first pressure sensor 308, and obtaining a preset fan operating pressure range;

[0063] In this embodiment, the preset fan operating 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 operating pressure range, the condensing fan 306 is controlled to maintain the operating state unchanged;

[0065] 303. When the first pressure information is lower than the preset fan operating pressure range, control the condensing fan 306 to load;

[0066] 304. When the first pressure information is higher than the preset fan operating pressure range, control the condensing fan 306 to unload;

[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 operating pressure range, the controller 4 will automatically instruct the condensing fan 306 to load and operate, thereby ensuring that the cold storage chiller operates in a high-efficiency state; conversely, when the pressure is lower than the preset fan operating pressure range, the controller 4 will control the condensing fan 306 to unload, thereby reducing unnecessary energy consumption. This intelligent adjustment mechanism not only improves the operating efficiency of the cold storage chiller, but also extends the service life of the condensing fan 306.

[0068] For further information, see Figure 3 and Figure 5 The refrigeration unit further includes a bypass pipeline portion electrically connected to the controller 4, one end of the bypass pipeline portion is connected to the connecting pipeline of the compressor 301 and the condenser 302, and the other end of the bypass pipeline portion is connected to the first output end of the evaporator 305; the real-time first pressure information fed back by the first pressure sensor 308 is obtained, and then the following is further included:

[0069] 305. Obtaining 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, the bypass pipeline section is controlled to maintain the working state unchanged;

[0072] 307. When the first pressure information is lower than the preset bypass working pressure range, the bypass pipeline part is controlled to start working;

[0073] 308. When the first pressure information is higher than a preset bypass working pressure range, the bypass pipeline section is controlled to stop working.

[0074] For operation under certain ambient temperatures, when there is no bypass pipe section, the condensing fan 306 is able to provide sufficient cooling for the exhaust gas of the compressor 301. However, when the outdoor ambient temperature rises significantly, the cooling effect of the condensing fan 306 will be insufficient, resulting in a significant increase in the high pressure of the compressor 301, which is likely to cause a high pressure alarm. In this embodiment, by setting a bypass pipe section, when the exhaust pressure of the compressor 301 rises significantly and is higher than the preset bypass working pressure range, the bypass pipe section starts to work, and promptly bypasses a portion of the refrigerant of the high-pressure exhaust gas of the compressor 301 to enter the air intake port of the compressor 301. In this way, even when the ambient temperature is very high and the condensing fan 306 is insufficient for cooling, the bypass pipe section can be used to relieve the pressure, thereby ensuring that the compressor 301 can still operate stably and reliably under very high ambient temperatures.

[0075] For further information, see Figure 4 and Figure 5 , the cold storage pipeline part also includes a flow protector 22 and a fourth temperature sensor 24 electrically connected to the controller 4 respectively, the fourth temperature sensor 24 is arranged on the connecting pipeline between the second output end of the evaporator 305 and the water pump 21, and the flow protector 22 is arranged on the connecting pipeline between 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 working, and then also includes:

[0076] 401. When the flow protector 22 is disconnected, the compressor 301 is controlled to stop, and a flow cut-off alarm instruction is output;

[0077] In this embodiment, when the flow protector 22 detects an abnormal situation and disconnects, the controller 4 will respond quickly, automatically control the compressor 301 to shut down, and simultaneously output a flow interruption alarm signal, thereby avoiding equipment damage caused by abnormal flow. It also reminds the operator to take corresponding measures through timely alarms, thereby greatly improving the safety performance of the chiller during operation.

[0078] 402. When the flow protector 22 is turned on, real-time fourth temperature information fed back by the fourth temperature sensor 24 is obtained, and a preset protection action temperature and a preset protection reset temperature are obtained;

[0079] 403. When the fourth temperature information is less than the preset protection action temperature, the compressor 301 is controlled to stop, and a low temperature alarm instruction is output;

[0080] In this embodiment, the fourth temperature sensor 24 is arranged at the second output end of the evaporator 305. The temperature of the cold source output by the second output port will be relatively low after being cooled. When the outlet water temperature is lower than the preset protection action temperature, the inside of the evaporator 305 is very easy to freeze. After freezing, the volume will expand and burst the evaporator 305, causing damage to the evaporator 305; therefore, a protection mechanism should be set for the evaporator 305 according to the fourth temperature information. When the fourth temperature information is less than the preset protection action temperature, it is necessary to control the compressor 301 to shut down and stop refrigeration to prevent the cold water host from freezing.

[0081] 404. When the fourth temperature information is greater than or equal to the preset protection reset temperature, the compressor 301 is controlled to maintain the original working state unchanged, and an alarm reset instruction is output;

[0082] In this embodiment, when the flow protector 22 is turned on and the fourth temperature information is ≥ the preset protection reset temperature, the controller 4 will automatically reset the alarm and maintain the original operating state of the compressor 301, so that the cold water storage chiller can quickly return to normal operating state after the temperature returns to normal, avoiding unnecessary downtime and improving work efficiency and equipment operating efficiency.

[0083] See also Figure 5 The present invention also provides a cold-storage chiller, which adopts any of the cold-storage methods described above to realize working control; the cold-storage chiller includes a cold-storage tank 1, a controller 4, a cold-storage pipeline and a refrigeration unit, one side of the cold-storage tank 1 is connected to the refrigeration unit through the cold-storage pipeline, the cold-storage pipeline includes a third temperature sensor 23 electrically connected to the controller 4, and the third temperature sensor 23 is arranged on a connecting pipeline between an output end of one side of the cold-storage tank 1 and a second input end of the refrigeration unit; the other side of the cold-storage tank 1 is used to transport a cold source to a terminal; the refrigeration unit includes a compressor 301 electrically connected to the controller 4.

[0084] In this example, see Figure 5 A cold water supply pipe and a cold water return pipe are provided on the other side of the cold storage tank 1, and the cold water supply pipe and the cold water return pipe are respectively used to connect the ends to transport the cold source to the ends.

[0085] For further information, see Figure 5The cold storage pipeline portion also includes 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 the input end of one side 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 output end of one side of the cold storage tank 1 and the second input end of the refrigeration unit.

[0086] For further information, see Figure 5 The refrigeration unit also includes an evaporator 305, a condenser 302, a filter 303, an expansion valve 304, and a condensing fan 306 electrically connected to the controller 4, a first pressure sensor 308, a first temperature sensor 307, a second pressure sensor 310 and a second temperature sensor 309; the evaporator 305, the compressor 301, the condenser 302, the filter 303 and the expansion valve 304 are connected end to end in sequence 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 this 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, and are used to monitor the state of the high-temperature and high-pressure refrigerant discharged from the compressor 301 in real time to ensure that it reaches the ideal temperature and pressure before entering the condenser 302; while the second temperature sensor 309 and the second pressure sensor 310 are located on the connecting pipeline between the evaporator 305 and the compressor 301, and are responsible for monitoring the state of the low-temperature and low-pressure refrigerant returning from the evaporator 305 to the compressor 301 to ensure that the refrigerant reaches suitable conditions before re-entering the compressor 301.

[0088] For further information, see Figure 5 The refrigeration unit also includes a bypass pipeline portion electrically connected to the controller 4, one end of the bypass pipeline portion is connected to the connecting pipeline between the compressor 301 and the condenser 302, and the other end of the bypass pipeline portion is connected to the first output end of the evaporator 305.

[0089] In this example, see Figure 5The bypass pipeline section 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 to the connecting pipeline of the compressor 301 and the condenser 302, and the other end of the bypass on-off valve 312 is connected to 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 section 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 a preset opening; when the bypass pipeline section stops working, the bypass on-off valve 312 and the bypass regulating valve 311 are closed to close the bypass pipeline.

[0090] In this example, see Figure 5 A diffuser 11 and a flow equalizer 12 are provided in the cold storage box 1. The second output end of the evaporator 305 is connected to the diffuser 11 through an input end on one side of the cold storage box 1. The output end of the flow equalizer 12 is connected to the second input end of the evaporator 305 through an output end on one side of the cold storage box 1.

[0091] In this embodiment, by arranging a diffuser 11 and a flow equalizer 12 in the cold storage box 1, the cooling efficiency and performance of the cold water chiller with cold storage are significantly improved; first, the introduction of the diffuser 11 enables the coolant to be evenly distributed in the entire cold storage box 1, avoiding the problem of uneven cooling effect caused by the accumulation of coolant in certain areas. This uniform distribution characteristic ensures that every corner can be fully cooled, thereby improving the overall cold storage efficiency; secondly, the introduction of the diffuser 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 to the second input end of the evaporator 305 through the output end on one side of the cold storage box 1 ensures that the coolant can be evenly mixed and distributed before returning to the evaporator 305. This uniform flow characteristic not only improves the utilization efficiency of the coolant, but also ensures that the evaporator 305 can operate in an optimal state, thereby improving the cold storage effect of the cold water chiller with cold storage.

[0092] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A cold storage method, characterized in that: A cold water chiller capable of storing cold comprises a cold storage tank, a controller, a cold storage pipeline portion and a refrigeration unit, wherein the cold storage tank is connected to the refrigeration unit through the cold storage pipeline portion, the cold storage pipeline portion comprises a third temperature sensor electrically connected to the controller, and the third temperature sensor is arranged on a connecting pipeline between an output end on one side of the cold storage tank and a second input end of the refrigeration unit; the refrigeration unit comprises a compressor electrically connected to the controller; the cold storage method comprises the steps of: When the chiller is in cold storage mode, the refrigeration unit and the cold storage pipeline are controlled to start working; Acquire real-time third temperature information fed back by the third temperature sensor, and acquire a preset cold storage temperature range; When the third temperature information is within the preset cold storage temperature range, controlling the compressor to maintain the working state unchanged; When the third temperature information is lower than a preset cold storage temperature range, controlling the compressor to unload; When the third temperature information is higher than a preset cold storage temperature range, the compressor is controlled to load.

2. A cold storage method according to claim 1, characterized in that: The refrigeration unit further includes an evaporator, a condenser and a condensing fan electrically connected to the controller, the evaporator, the compressor and the condenser are connected to form a refrigeration cycle; the cold storage pipeline part further 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 through the water pump, and the output end of the cold storage tank is connected to the second input end of the evaporator; when the working mode of the chiller is the cold storage mode, the refrigeration unit and the cold storage pipeline part are controlled to start working, including: When the chiller is in cold storage mode, the water pump is controlled to start working first; When the preset buffer time is reached, the condensing fan is controlled to start working, and then the compressor is controlled to start working.

3. A cold storage method according to claim 2, characterized in that: The refrigeration unit further includes a first pressure sensor electrically connected to the controller, wherein the first pressure sensor is disposed on a connecting pipeline between the compressor and the condenser; the control refrigeration unit and the cold storage pipeline part start working, and then further includes: Obtaining real-time first pressure information fed back by the first pressure sensor, and obtaining a preset fan operating pressure range; When the first pressure information is within the preset fan operating pressure range, the condensing fan is controlled to maintain the working state unchanged; When the first pressure information is lower than the preset fan operating pressure range, the condensing fan is controlled to unload; when the first pressure information is higher than the preset fan operating pressure range, the condensing fan is controlled to load.

4. A cold storage method according to claim 3, characterized in that: The refrigeration unit further includes a bypass pipeline portion electrically connected to the controller, one end of the bypass pipeline portion is connected to a connecting pipeline between the compressor and the condenser, and the other end of the bypass pipeline portion is connected to a first output end of the evaporator; the real-time first pressure information fed back by the first pressure sensor is obtained, and then the following is further included: Obtain the preset bypass working pressure range; When the first pressure information is within a preset bypass working pressure range, the bypass pipeline section is controlled to maintain a working state unchanged; When the first pressure information is lower than the preset bypass working pressure range, the bypass pipeline part is controlled to start working; When the first pressure information is higher than a preset bypass working pressure range, the bypass pipeline section is controlled to stop working.

5. A cold storage method according to claim 2, characterized in that: The cold storage pipeline portion further includes a flow protector and a fourth temperature sensor electrically connected to the controller respectively, the fourth temperature sensor is arranged on the connecting pipeline between the second output end of the evaporator and the water pump, and the flow protector is arranged on the connecting pipeline between the output end of the cold storage tank and the second input end of the evaporator; The control refrigeration unit and the cold storage pipeline part start working, and then further includes: When the flow protector is disconnected, the compressor is controlled to stop and a flow cut-off alarm instruction is output; When the flow protector is turned on, real-time fourth temperature information fed back by the fourth temperature sensor is obtained, and a preset protection action temperature and a preset protection reset temperature are obtained; When the fourth temperature information is less than the preset protection action temperature, the compressor is controlled to stop and a low temperature alarm instruction is output; When the fourth temperature information is greater than or equal to the preset protection reset temperature, the compressor is controlled to maintain the original working state unchanged, and an alarm reset instruction is output.

6. A chiller capable of storing cold, characterized in that: The cold-storage chiller adopts the cold-storage method as described in any one of claims 1 to 5 to realize working control; the cold-storage chiller includes a cold-storage box, a controller, a cold-storage pipeline part and a refrigeration unit, one side of the cold-storage box is connected to the refrigeration unit through the cold-storage pipeline part, the cold-storage pipeline part includes a third temperature sensor electrically connected to the controller, and the third temperature sensor is arranged on the connecting pipeline between the output end of one side of the cold-storage box and the second input end of the refrigeration unit; the other side of the cold-storage box is used to transport the cold source to the end; the refrigeration unit includes a compressor electrically connected to the controller.

7. A cold water chiller capable of storing cold according to claim 6, characterized in that: The cold storage pipeline portion also includes 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 on 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; the flow protector is arranged on the connecting pipeline between the output end on one side of the cold storage tank and the second input end of the refrigeration unit.

8. The cold water chiller capable of storing cold according to claim 6, characterized in that: The refrigeration unit also includes an evaporator, a condenser, a filter, an expansion valve, a condensing fan electrically connected to the controller, a first pressure sensor, a first temperature sensor, a second pressure sensor and a second temperature sensor; 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 arranged on the connecting pipeline between the compressor and the condenser; the second temperature sensor and the second pressure sensor are arranged on the connecting pipeline between the evaporator and the compressor.

9. A cold water chiller capable of storing cold according to claim 8, characterized in that: The refrigeration unit further comprises a bypass pipeline portion electrically connected to the controller, one end of the bypass pipeline portion is connected to a connecting pipeline between the compressor and the condenser, and the other end of the bypass pipeline portion is connected to a first output end of the evaporator.

10. The cold water chiller capable of storing cold according to claim 6, characterized in that: A diffuser and a flow equalizer are arranged in the cold storage box, the second output end of the evaporator is connected to the diffuser through an 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 an output end on one side of the cold storage box.

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