Refrigeration method of refrigeration device, refrigeration device, refrigeration system, and spraying device

Abstract

The application relates to a refrigeration method of a refrigeration device, the refrigeration device, a refrigeration system and a spraying device, wherein the method comprises the following steps: monitoring a pressure value of a refrigeration unit of the refrigeration device during operation of the refrigeration unit; when the pressure value exceeds a preset value, starting a spraying module of the refrigeration device to spray a heat dissipation unit of the refrigeration device in a preset spraying mode, wherein in the preset spraying mode, a first time length of spraying and a second time length of non-spraying in each spraying period are in a certain proportion, and the sum of the first time length and the second time length is the time length of the spraying period; and adjusting the proportion in the preset spraying mode according to the pressure value and the change condition of an electronic expansion valve until the pressure value and the electronic expansion valve meet a stable condition. The application solves the technical problem that the pressure and temperature of a spraying refrigeration unit fluctuate greatly in the prior art.

Description

Technical Field

[0001] This application relates to the field of refrigeration appliances, and more particularly to a refrigeration method, refrigeration equipment, refrigeration system, and spray device for refrigeration equipment. Background Technology

[0002] During air conditioning system operation, excessively high operating pressure often occurs, limiting compressor load or triggering overload protection, affecting operational comfort and reliability, especially under high-temperature conditions. To address this, the market has developed new technologies to reduce system pressure, thereby improving unit output during high-temperature cooling. One of the most effective technologies is the use of spray nozzles to enhance heat exchange in air conditioning radiators. The basic principle is that when the air conditioning unit's high pressure is too high, the outlet spray nozzles activate, spraying water onto the radiator's heat exchanger to enhance heat exchange. This solution can quickly and effectively reduce unit operating pressure, alleviating the problems caused by extreme high temperatures.

[0003] However, existing spray technology is immature and has many drawbacks, especially in terms of control. Its compatibility with the actual operating conditions of the unit is extremely low, resulting in unsatisfactory performance. In current technology and actual use, the spray heads open when the unit pressure is too high and close when the pressure drops. This causes constant fluctuations in refrigerant flow and throttling effect. As a result, the air conditioning performance for users varies greatly, with inconsistent cooling and significant temperature variations. Summary of the Invention

[0004] This application provides a refrigeration method for a refrigeration device to solve the technical problem of large pressure and temperature fluctuations in existing spray refrigeration units.

[0005] In a first aspect, this application provides a cooling method for a refrigeration device, comprising: monitoring the pressure value of the refrigeration unit during operation of the refrigeration unit; when the pressure value exceeds a preset value, activating the spray module of the refrigeration device to spray the heat dissipation unit of the refrigeration device using a preset spray mode, wherein, in the preset spray mode, the first spray duration and the second non-spray duration within each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle; adjusting the proportion in the preset spray mode according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions.

[0006] Secondly, this application provides a spray module, comprising: a monitoring module for monitoring the pressure value of the refrigeration unit during operation of the refrigeration unit of the refrigeration equipment; a start module for starting the spray module to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode when the pressure value exceeds a preset value, wherein, in the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle; and an adjustment module for adjusting the proportion in the preset spray mode according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions.

[0007] Thirdly, this application provides a refrigeration device, including the aforementioned spray module.

[0008] Fourthly, this application provides a refrigeration system for a refrigeration device, comprising: a refrigeration unit, a heat dissipation unit, and a spray module; wherein, during the operation of the refrigeration unit, the pressure value of the refrigeration unit is monitored; when the pressure value exceeds a preset value, the spray module is activated to spray the heat dissipation unit of the refrigeration device using a preset spray mode, wherein, in the preset spray mode, the first spray duration and the second non-spray duration within each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle; the proportion in the preset spray mode is adjusted according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions.

[0009] Fifthly, this application provides a refrigeration device for a refrigeration apparatus, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to execute a refrigeration method of the refrigeration apparatus by executing executable instructions in the memory.

[0010] Sixthly, this application also provides a computer storage medium storing computer-executable instructions for executing the refrigeration method of the refrigeration device described in any one of the above claims.

[0011] Compared with the prior art, the technical solution provided in this application has the following advantages: The method provided in this application monitors the pressure value of the refrigeration unit during its operation. When the pressure value exceeds a preset value, the spray module of the refrigeration equipment is activated to spray the heat dissipation unit of the refrigeration equipment using a preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle. The proportion in the preset spray mode is adjusted according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions. Thus, in the spray refrigeration process, by controlling the ratio of the spray duration to the non-spray duration in the spray cycle, the pressure of the refrigeration unit in the spray refrigeration process tends to be stable, and the refrigeration temperature tends to be stable, avoiding large fluctuations. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0015] Figure 1 A flowchart illustrating a refrigeration method for a refrigeration device provided in this application embodiment;

[0016] Figure 2 A flowchart illustrating a refrigeration method for another refrigeration device provided in this application embodiment;

[0017] Figure 3 A flowchart illustrating a refrigeration method for another refrigeration device provided in this application embodiment;

[0018] Figure 4 This is a schematic diagram of a system provided in an embodiment of this application;

[0019] Figure 5 This is a parameter variation diagram provided in an embodiment of this application;

[0020] Figure 6 A schematic diagram of the spray module provided in an embodiment of this application;

[0021] Figure 7 The refrigeration system of the refrigeration equipment provided in the embodiments of this application;

[0022] Figure 8 This is a schematic diagram of an electronic device provided in this embodiment. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0025] To address the technical problem of large pressure and temperature fluctuations in existing spray refrigeration units, this application provides a refrigeration method for refrigeration equipment, which can reduce pressure and temperature fluctuations in the refrigeration unit during the spray refrigeration process.

[0026] Figure 1 A flowchart of a refrigeration method for a refrigeration device provided in an embodiment of this application is shown below. Figure 1 As shown, it includes:

[0027] S102, During the operation of the refrigeration unit of the refrigeration equipment, monitor the pressure value of the refrigeration unit;

[0028] S104, when the pressure value exceeds the preset value, the spray module of the refrigeration equipment is activated to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle.

[0029] S106, adjust the ratio under the preset spray mode according to the changes in pressure value and electronic expansion valve until the pressure value and electronic expansion valve meet the stable conditions.

[0030] The refrigeration equipment in this application can be air conditioners, refrigerators, freezers, cold storage facilities, or other equipment that can provide cooling energy. The refrigeration unit can be the indoor unit of an air conditioner, and the cooling unit can be the outdoor unit. For refrigerators, freezers, and cold storage facilities, the refrigeration unit provides the cooling energy, and the cooling unit dissipates heat from the refrigeration unit. That is, the heat generated by the refrigeration unit during the cooling process is dissipated by the cooling unit; otherwise, the refrigeration unit would generate too much heat and be unable to provide effective cooling.

[0031] Taking an air conditioner as an example, the refrigeration unit and the heat dissipation unit work together. The refrigeration unit, acting as the indoor unit, provides cooling energy, while the heat dissipation unit, acting as the outdoor unit, dissipates heat. During this process, the outdoor unit will be hotter than the indoor unit. To accelerate the heat dissipation efficiency of the outdoor unit, water can be sprayed onto it using a spray nozzle. The form of water spraying is not limited in this embodiment. For example, water can be sprinkled onto the heat dissipation plate or sprayed as a mist, the purpose being to adhere liquid water to the heat dissipation unit, thereby accelerating its heat dissipation. However, since directly spraying water onto the heat dissipation unit will significantly increase its heat dissipation efficiency, the cooling effect of the indoor refrigeration unit will increase dramatically. This will cause large fluctuations in the compressor frequency of the refrigeration unit, resulting in large fluctuations in the indoor cooling temperature, thus affecting the stability of the cooling system.

[0032] Based on this, this embodiment proposes a method to activate the spray module and spray the cooling unit using a preset spray mode when the pressure value of the refrigeration unit exceeds a preset value. Instead of spraying the cooling unit all at once until the compressor frequency drops to a certain level, which would cause large fluctuations in compressor frequency and indoor cooling temperature, the method uses a spray cycle with a first spray duration followed by a second duration, intermittently spraying over multiple spray cycles. Furthermore, the ratio of the first to second durations is adjusted based on changes in the refrigeration unit's pressure and the electronic expansion valve during intermittent spraying, resulting in a more reasonable ratio of spraying to non-spraying time within a single cycle. This allows the compressor frequency and indoor temperature to gradually stabilize, preventing large fluctuations and improving the stability of the cooling process.

[0033] In the aforementioned process, starting from the moment the refrigeration equipment begins cooling, the pressure of the refrigeration unit increases as the compressor frequency rises or as the unit continues to run after startup. This application sets a preset value; if the pressure exceeds this preset value, the spray module is activated to spray the cooling unit. This preset value can be an empirical value, determined based on the environment in which the refrigeration equipment is located. For example, the temperature, humidity, and heat intensity of the external environment differ near the equator and in mid-latitude regions. Therefore, different preset values ​​can be set.

[0034] In this embodiment, the spray module can be a module within a refrigeration unit. The spray module can be connected to an external water source to spray water onto the refrigeration unit's cooling system. Alternatively, the spray module can be a standalone module, either detachably installed within the refrigeration unit or used independently to assist in cooling the refrigeration unit. If the spray module is part of the refrigeration unit, it can be controlled by the refrigeration unit's controller. If the spray module is a standalone module, it can have its own controller, receiving the pressure value from the refrigeration unit and autonomously determining when to activate the spray module.

[0035] In this embodiment, after the refrigeration equipment starts the spray module, the spray module will spray intermittently within a certain time period, i.e., spraying for a first duration followed by a rest period. No spraying occurs during the rest period. This ensures that each cycle includes a first duration of spraying and a second duration of rest, repeating multiple cycles to achieve multi-cycle cyclic spraying. During the cyclic spraying process, the pressure value of the refrigeration unit and the changes in the electronic expansion valve are also monitored. Based on these changes, the durations of the first and second periods in the spray cycle are adjusted. For example, if the pressure value of the refrigeration unit changes significantly, or if the electronic expansion valve fluctuates greatly, the first duration is increased and the second duration is decreased, allowing for a larger proportion of the spraying time. This reduces the fluctuations in the pressure value of the refrigeration unit or the fluctuations in the electronic expansion valve.

[0036] The method provided in this application embodiment monitors the pressure value of the refrigeration unit during its operation. When the pressure value exceeds a preset value, the spray module of the refrigeration unit is activated to spray the heat dissipation unit of the refrigeration unit using a preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration within each spray cycle are in a certain ratio, and the sum of the first and second durations is the duration of the spray cycle. The ratio under the preset spray mode is adjusted according to changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions. Thus, during the spray refrigeration process, by controlling the ratio of the spray duration to the non-spray duration in the spray cycle, the pressure of the refrigeration unit tends to be stable, and the refrigeration temperature tends to be stable, avoiding large fluctuations.

[0037] In this embodiment, as Figure 2 As shown, one way to activate the spray module of the refrigeration equipment and spray the radiator unit of the refrigeration equipment using a preset spray mode when the pressure value exceeds the preset value is as follows:

[0038] S202, in the preset spray mode, the spray cycle is set to a predetermined duration, and the total spraying time of the spray module in each spray cycle is controlled to be the first duration, while the total duration of stopping the spray is kept to be the second duration.

[0039] In other words, in this embodiment, when the spray module is activated to spray for the first duration within a spray cycle, the spraying action within the spray cycle can also be discontinuous, as long as the total spraying duration is the first duration. Therefore, for any given spray cycle, the spray module can be controlled to spray for a period, then stop for a period, then spray for another period, and then stop for another period. This achieves intermittent spraying within the spray cycle. Alternatively, the spray module can be allowed to start spraying for the first duration at any point within the spray cycle (the time interval between this point and the end of the spray cycle is greater than the first duration). The total spraying duration within a spray cycle must be the first duration. The remaining non-spraying duration will necessarily be the second duration.

[0040] For example, in one scenario, the spray module can be controlled to spray for the first duration of a spray cycle and stop spraying for the second duration of a spray cycle. This spraying method essentially involves spraying at the beginning of each spray cycle, stopping after the first duration, and waiting for the second duration before starting the next spray cycle. The advantage of this approach is that complex calculations are not required for the first spray duration and the non-spraying second duration within a spray cycle; spraying only needs to begin at the start of the cycle, reducing computational complexity. Furthermore, in this mode, the spray head of the spray module does not need to be frequently opened and closed.

[0041] In another example, the first duration can be divided into M first sub-durations, and the second duration can be divided into M second sub-durations; the spraying module is controlled to start spraying the first sub-duration and stop spraying the second sub-duration after the spraying begins at the start time of the spraying cycle, until the spraying cycle ends after repeating M times.

[0042] In other words, within a spray cycle, the spray from the spray head is intermittent. For example, if the spray cycle is 10 seconds, with a first duration of 4 seconds and a second duration of 6 seconds, then the first duration can be divided into five 0.8-second intervals, the second duration into five 1.2-second intervals, and the 10 seconds of the spray cycle into five 2-second intervals. Within each 2-second interval, there is a 0.8-second spray followed by a 1.2-second rest. This achieves intermittent spraying within each spray cycle. A total of 5 sprays are performed. It should be noted that, since in this embodiment, as long as the total spraying time within a spray cycle is equal to the first duration, intermittent spraying is acceptable within the spray cycle, but the 0.8-second spray, 1.2-second rest cycle is not strictly adhered to, as long as the total spraying time is equal to the first duration. If, within a 10-second spray cycle, there is a 1-second wait, followed by a 2-second spray, then a 4-second wait, then a 2-second spray, and then a 1-second wait, the total spray duration is 4 seconds, and the total waiting duration is 6 seconds, which meets the requirements of the first and second durations.

[0043] In this embodiment, as Figure 3 As shown, one implementation method involves adjusting the ratio under a preset spray mode based on changes in pressure and the electronic expansion valve until the pressure and the electronic expansion valve meet stable conditions.

[0044] S302, when the change in pressure value is greater than the change threshold, or when the deviation of the electronic expansion valve of the refrigeration unit is greater than the preset deviation, the proportion of the preset spray mode is adjusted to a higher level. The higher the proportion of the preset spray mode, the greater the proportion of the first duration in the spray cycle.

[0045] In this embodiment, since the spray module has been activated based on the pressure value of the refrigeration unit, the spraying will increase the heat dissipation efficiency of the refrigeration unit's cooling system, thus simultaneously increasing the refrigeration efficiency, enhancing the cooling capacity, and lowering the temperature. If set to a constant temperature, the compressor frequency of the refrigeration unit will decrease due to the enhanced cooling capacity. If, during the spraying process, the pressure value fluctuates greatly (large fluctuations), or the opening of the electronic expansion valve fluctuates greatly (large fluctuations in the opening of the electronic expansion valve), it indicates that the pressure value or cooling capacity of the refrigeration unit is unstable and fluctuates significantly. The reason for this instability is that after the spray module sprays water, the heat dissipation efficiency of both the cooling system and the refrigeration unit increases sharply. During the intervals when the spray module is not spraying, the heat dissipation efficiency of both the cooling system and the refrigeration unit suddenly decreases. This indicates that the spraying intensity is insufficient at these times. Therefore, the initial spraying time should be increased to make the total spraying time longer within the spraying cycle. For example, if the first part of the spray cycle originally accounted for 1 / 3, it is adjusted to account for 2 / 3. Therefore, a longer spray duration within the spray cycle allows the heat dissipation efficiency of the radiator and the cooling efficiency of the chiller to stabilize.

[0046] In this embodiment, a ratio can be set between the total spraying time (first duration) and the total non-spraying time (second duration) within a spray cycle. This ratio is the ratio of the first duration to the spray cycle, or the ratio of the first duration to the second duration. The larger the ratio, the higher the spray level, indicating a larger proportion of the spraying time to the spray cycle. For example, multiple spray levels can be set, from level 1 to level 10, with the ratio increasing with each level increase.

[0047] In this embodiment, when the pressure value exceeds the preset value, one way to activate the spray module of the refrigeration equipment to spray the heat dissipation unit of the refrigeration equipment using the preset spray mode is to determine the ratio of the preset spray mode as the first level ratio, or to determine the ratio of the preset spray mode as the ratio used when the last spray ended; and activate the spray module of the refrigeration equipment to spray the heat dissipation unit using the preset spray mode.

[0048] In the example above, the spray level is adjusted according to specific conditions during the spraying process. As the spray level increases, the cooling effect of the refrigeration equipment and the compressor frequency are stabilized. Therefore, when the spray module is first turned on, the initial level must be determined. One approach is to start at the first level and then gradually increase it. Although this method always starts at the first level, the gradual increase allows for adjustments to find a spray mode suitable for the current environment. Another approach is to use the level before the spray mode was last turned off as the starting level. The advantage of this method is that it starts at a level closer to the previous spray mode, avoiding multiple level adjustments.

[0049] In this embodiment, one way to adjust the ratio under the preset spray mode according to the changes in pressure value and electronic expansion valve until the pressure value and electronic expansion valve meet the stability condition is to determine that the pressure value and electronic expansion valve meet the stability condition when the change in pressure value is less than or equal to the change threshold and the deviation of the electronic expansion valve of the refrigeration unit is less than or equal to the preset deviation; determine the average value of the opening of the electronic expansion valve in the first spray cycle of spraying at the current ratio of the preset spray mode; and fix the opening of the electronic expansion valve to the average value.

[0050] In this embodiment, after the spray module has undergone multiple level adjustments in the preset spray mode, it enters a stable mode. In this stable mode, the opening of the electronic expansion valve can be fixed. With a fixed opening, the flow rate of liquid passing through the electronic expansion valve per unit time is constant. If the liquid temperature fluctuation is small, the cooling energy output by the refrigeration equipment is essentially stable. The opening of the electronic expansion valve can be set to the average opening of the electronic expansion valve during the first spray cycle at that level, after multiple level adjustments and when the system is in a stable state (without level adjustments for a period of time). The opening of the electronic expansion valve is then set to this average value, which no longer changes.

[0051] In this embodiment, when the pressure value exceeds a preset value and the spray module of the refrigeration equipment is activated to spray the refrigeration unit using a preset spray mode, the compressor frequency of the refrigeration unit can be set to a fixed value. Setting the compressor frequency to a fixed value fixes the refrigeration efficiency of the refrigeration unit. Furthermore, the opening degree of the electronic expansion valve is fixed in the above embodiment; therefore, the subsequent cooling capacity of the refrigeration unit and the room temperature tend to remain constant. In this case, if the room temperature where the refrigeration unit is located continues to drop, the preset spray mode ratio is adjusted to a lower level. At this time, the compressor frequency and the opening degree of the electronic expansion valve are fixed; by adjusting the level, the cooling temperature can be stabilized.

[0052] In this embodiment, the spraying process is not continuous. The spraying module can be stopped after several spray cycles. At this time, the pressure value of the refrigeration unit can be acquired; based on the acquired pressure value, it can be determined whether to restart the spraying module. When restarting the spraying, it can begin from the preset spraying mode level from when it was last shut down, or from the first level.

[0053] In this embodiment, the spray cycle and spray level can be set. The spray cycle ΔT is a settable value, generally 1 to 2 minutes, but can also be set to other values. The spray level indicates the proportion of spray time to total time within the spray cycle; the higher the level, the larger the proportion. For example, spray mode N: preset different spray modes 1 to 9. The difference between these modes lies in the spray / off ratio, which is different within a cycle. The larger N is, the greater the proportion of spray, meaning more spray water.

[0054] Table 1 shows the different levels of spray patterns. The higher the level, the greater the proportion of spray coverage.

[0055] Table 1

[0056] Setting Mode Spraying duration Closure duration Spray Mode 1 10％ 90％ Spray Mode 2 20％ 80％ Spray Mode 3 30％ 70％ Spray Mode 4 40％ 60％ Spray Mode 5 50％ 50％ Spray Mode 6 60％ 40％ Spray Mode 7 70％ 30％ Spray mode 8 80％ 20％ Spray mode 9 90％ 10％

[0057] In this embodiment, the pressure value (also known as the condensing saturation temperature) Pd of the refrigeration unit refers to the exhaust side pressure value, which can be equivalent to the saturation temperature value corresponding to the condensing pressure. It is detected by the high-pressure sensor, a conventional component of the unit, and the unit is ℃. This allows the pressure value to be converted into a saturation temperature value. The pressure value is then calculated using the saturation temperature value.

[0058] Figure 4 This is a system schematic diagram of this embodiment. The spray activation condition is determined as follows: when the unit is running in cooling mode, the unit monitors the high pressure value (Pd) of the module in real time. When the high pressure value reaches a certain value (3.2 MPa, corresponding to a saturation temperature of 60°C) and is maintained for a certain period of time (the time is settable, generally 3 minutes is an empirical value), the unit determines that the high pressure is too high and the spray needs to be activated to enhance heat exchange and reduce the high pressure value. Otherwise, normal operation is maintained, and spray enhancement is not required.

[0059] In spray mode, after the unit activates the spray system, it will enter a preset specific spray mode N. There are multiple preset spray modes: Spray Mode 1, Spray Mode 2… Spray Mode N. These modes differ only in the ratio of the spray head opening and closing time. Unless otherwise specified, the default is to enter Spray Mode 1. Once in this mode, the compressor operates at 100% load (100% load means the unit operates at the frequency calculated by normal control, without frequent adjustments. For example, if the load demand is 50Hz, it will operate at 50Hz; if the load demand is 80Hz, it will operate at 80Hz—no frequency reduction or increase, it runs exactly as calculated). After 3 minutes, the unit collects data and makes a judgment (allowing 3 minutes for stabilization adjustment time). It checks whether the high-pressure deviation value of the first adjustment cycle after entering the latest spray mode is ≥5℃, and whether the deviation of the indoor unit's electronic expansion valve is ≥10% (indoor unit electronic expansion valve deviation = (maximum opening - minimum opening) / average opening). If so, it indicates that the unit is operating unstable, with large high-pressure fluctuations and large fluctuations in indoor unit adjustment, indicating that the existing spray mode is not satisfactory and the spray on-time percentage needs to be increased. The action is to switch to spray mode N+1 (for example, if it was originally spray mode 1, it will now switch to spray mode 2. If it was originally spray mode 3, it will now switch to spray mode 4).

[0060] If the situation remains unstable after adjustment, continue switching between spray modes at higher speeds until the high-pressure deviation and the deviation of the indoor unit's electronic expansion valve no longer meet the above conditions. Once spray mode N is confirmed and verified, the indoor unit's electronic expansion valve will be fixed based on the average value within the first statistical cycle (and will no longer participate in superheat adjustment). Exit condition: After one hour, the unit will reassess whether spraying is needed. If not, the spray mode will exit. After exiting the spray mode, if the conditions for restarting the spray are triggered again, the spray will either restart or resume spraying from the previously exited state.

[0061] Figure 5 This diagram illustrates the changes in the high-pressure value of the refrigeration module, the compressor frequency, and the electronic expansion valve (EXV) of the indoor refrigeration unit during the spraying process in this embodiment. The EXV is set to a fixed value after the initial fluctuations during the spraying phase.

[0062] When the indoor set temperature changes significantly, it is necessary to reassess whether to activate the sprinkler system. For example, if the set temperature changes by more than 3°C or the indoor temperature changes by more than 2°C, it can be determined that sprinkler operation is required.

[0063] Figure 6 This is a schematic diagram of a spray module provided in an embodiment of this application, as shown below. Figure 6 As shown, it includes:

[0064] The monitoring module 602 is used to monitor the pressure value of the refrigeration unit during the operation of the refrigeration unit of the refrigeration equipment;

[0065] The start module 604 starts the spray module to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode when the pressure value exceeds the preset value. In the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle.

[0066] Adjustment module 606 adjusts the ratio under the preset spray mode according to the changes in pressure value and electronic expansion valve until the pressure value and electronic expansion valve meet the stable conditions.

[0067] The refrigeration equipment in this application can be air conditioners, refrigerators, freezers, cold storage facilities, or other equipment that can provide cooling energy. The refrigeration unit can be the indoor unit of an air conditioner, and the cooling unit can be the outdoor unit. For refrigerators, freezers, and cold storage facilities, the refrigeration unit provides the cooling energy, and the cooling unit dissipates heat from the refrigeration unit. That is, the heat generated by the refrigeration unit during the cooling process is dissipated by the cooling unit; otherwise, the refrigeration unit would generate too much heat and be unable to provide effective cooling.

[0068] Taking an air conditioner as an example, the refrigeration unit and the heat dissipation unit work together. The refrigeration unit, acting as the indoor unit, provides cooling energy, while the heat dissipation unit, acting as the outdoor unit, dissipates heat. During this process, the outdoor unit will be hotter than the indoor unit. To accelerate the heat dissipation efficiency of the outdoor unit, water can be sprayed onto it using a spray nozzle. The form of water spraying is not limited in this embodiment. For example, water can be sprinkled onto the heat dissipation plate or sprayed as a mist, the purpose being to adhere liquid water to the heat dissipation unit, thereby accelerating its heat dissipation. However, since directly spraying water onto the heat dissipation unit will significantly increase its heat dissipation efficiency, the cooling effect of the indoor refrigeration unit will increase dramatically. This will cause large fluctuations in the compressor frequency of the refrigeration unit, resulting in large fluctuations in the indoor cooling temperature, thus affecting the stability of the cooling system.

[0069] Based on this, this embodiment proposes a method to activate the spray module and spray the cooling unit using a preset spray mode when the pressure value of the refrigeration unit exceeds a preset value. Instead of spraying the cooling unit all at once until the compressor frequency drops to a certain level, which would cause large fluctuations in compressor frequency and indoor cooling temperature, the method uses a spray cycle with a first spray duration followed by a second duration, intermittently spraying over multiple spray cycles. Furthermore, the ratio of the first to second durations is adjusted based on changes in the refrigeration unit's pressure and the electronic expansion valve during intermittent spraying, resulting in a more reasonable ratio of spraying to non-spraying time within a single cycle. This allows the compressor frequency and indoor temperature to gradually stabilize, preventing large fluctuations and improving the stability of the cooling process.

[0070] In the aforementioned process, starting from the moment the refrigeration equipment begins cooling, the pressure of the refrigeration unit increases as the compressor frequency rises or as the unit continues to run after startup. This application sets a preset value; if the pressure exceeds this preset value, the spray module is activated to spray the cooling unit. This preset value can be an empirical value, determined based on the environment in which the refrigeration equipment is located. For example, the temperature, humidity, and heat intensity of the external environment differ near the equator and in mid-latitude regions. Therefore, different preset values ​​can be set.

[0071] In this embodiment, the spray module can be a standalone module, which can be detachably installed into the refrigeration equipment or used as a separate module to assist the cooling unit of the refrigeration equipment in dissipating heat. If the spray module is a standalone module, it can have its own controller that receives the pressure value of the refrigeration unit of the refrigeration equipment and then autonomously determines when to activate the spray module.

[0072] In this embodiment, after the refrigeration equipment starts the spray module, the spray module will spray intermittently within a certain time period, i.e., spraying for a first duration followed by a rest period. No spraying occurs during the rest period. This ensures that each cycle includes a first duration of spraying and a second duration of rest, repeating multiple cycles to achieve multi-cycle cyclic spraying. During the cyclic spraying process, the pressure value of the refrigeration unit and the changes in the electronic expansion valve are also monitored. Based on these changes, the durations of the first and second periods in the spray cycle are adjusted. For example, if the pressure value of the refrigeration unit changes significantly, or if the electronic expansion valve fluctuates greatly, the first duration is increased and the second duration is decreased, allowing for a larger proportion of the spraying time. This reduces the fluctuations in the pressure value of the refrigeration unit or the fluctuations in the electronic expansion valve.

[0073] The method provided in this application embodiment monitors the pressure value of the refrigeration unit during its operation. When the pressure value exceeds a preset value, the spray module of the refrigeration unit is activated to spray the heat dissipation unit of the refrigeration unit using a preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration within each spray cycle are in a certain ratio, and the sum of the first and second durations is the duration of the spray cycle. The ratio under the preset spray mode is adjusted according to changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions. Thus, during the spray refrigeration process, by controlling the ratio of the spray duration to the non-spray duration in the spray cycle, the pressure of the refrigeration unit tends to be stable, and the refrigeration temperature tends to be stable, avoiding large fluctuations.

[0074] This application also provides a refrigeration device, including the aforementioned spray module. The spray module can be installed in the refrigeration device and is controlled by the refrigeration device.

[0075] This application also provides a refrigeration system for a refrigeration device, such as... Figure 7 As shown, it includes:

[0076] Refrigeration unit 702, heat dissipation unit 704 and spray module 706;

[0077] During the operation of the refrigeration unit, the pressure value of the refrigeration unit is monitored;

[0078] When the pressure value exceeds the preset value, the spray module is activated to spray the heat dissipation unit of the cooling equipment using the preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle.

[0079] Adjust the spray ratio under the preset mode according to the changes in pressure and electronic expansion valve until the pressure and electronic expansion valve reach a stable condition.

[0080] The refrigeration equipment in this application can be air conditioners, refrigerators, freezers, cold storage facilities, or other equipment that can provide cooling energy. The refrigeration unit can be the indoor unit of an air conditioner, and the cooling unit can be the outdoor unit. For refrigerators, freezers, and cold storage facilities, the refrigeration unit provides the cooling energy, and the cooling unit dissipates heat from the refrigeration unit. That is, the heat generated by the refrigeration unit during the cooling process is dissipated by the cooling unit; otherwise, the refrigeration unit would generate too much heat and be unable to provide effective cooling.

[0081] Taking an air conditioner as an example, the refrigeration unit and the heat dissipation unit work together. The refrigeration unit, acting as the indoor unit, provides cooling energy, while the heat dissipation unit, acting as the outdoor unit, dissipates heat. During this process, the outdoor unit will be hotter than the indoor unit. To accelerate the heat dissipation efficiency of the outdoor unit, water can be sprayed onto it using a spray nozzle. The form of water spraying is not limited in this embodiment. For example, water can be sprinkled onto the heat dissipation plate or sprayed as a mist, the purpose being to adhere liquid water to the heat dissipation unit, thereby accelerating its heat dissipation. However, since directly spraying water onto the heat dissipation unit will significantly increase its heat dissipation efficiency, the cooling effect of the indoor refrigeration unit will increase dramatically. This will cause large fluctuations in the compressor frequency of the refrigeration unit, resulting in large fluctuations in the indoor cooling temperature, thus affecting the stability of the cooling system.

[0082] Based on this, this embodiment proposes a method to activate the spray module and spray the cooling unit using a preset spray mode when the pressure value of the refrigeration unit exceeds a preset value. Instead of spraying the cooling unit all at once until the compressor frequency drops to a certain level, which would cause large fluctuations in compressor frequency and indoor cooling temperature, the method uses a spray cycle with a first spray duration followed by a second duration, intermittently spraying over multiple spray cycles. Furthermore, the ratio of the first to second durations is adjusted based on changes in the refrigeration unit's pressure and the electronic expansion valve during intermittent spraying, resulting in a more reasonable ratio of spraying to non-spraying time within a single cycle. This allows the compressor frequency and indoor temperature to gradually stabilize, preventing large fluctuations and improving the stability of the cooling process.

[0083] In the aforementioned process, starting from the moment the refrigeration equipment begins cooling, the pressure of the refrigeration unit increases as the compressor frequency rises or as the unit continues to run after startup. This application sets a preset value; if the pressure exceeds this preset value, the spray module is activated to spray the cooling unit. This preset value can be an empirical value, determined based on the environment in which the refrigeration equipment is located. For example, the temperature, humidity, and heat intensity of the external environment differ near the equator and in mid-latitude regions. Therefore, different preset values ​​can be set.

[0084] In this embodiment, the spray module can be a module within a refrigeration unit. The spray module can be connected to an external water source to spray water onto the refrigeration unit's cooling system. Alternatively, the spray module can be a standalone module, either detachably installed within the refrigeration unit or used independently to assist in cooling the refrigeration unit. If the spray module is part of the refrigeration unit, it can be controlled by the refrigeration unit's controller. If the spray module is a standalone module, it can have its own controller, receiving the pressure value from the refrigeration unit and autonomously determining when to activate the spray module.

[0085] In this embodiment, after the refrigeration equipment starts the spray module, the spray module will spray intermittently within a certain time period, i.e., spraying for a first duration followed by a rest period. No spraying occurs during the rest period. This ensures that each cycle includes a first duration of spraying and a second duration of rest, repeating multiple cycles to achieve multi-cycle cyclic spraying. During the cyclic spraying process, the pressure value of the refrigeration unit and the changes in the electronic expansion valve are also monitored. Based on these changes, the durations of the first and second periods in the spray cycle are adjusted. For example, if the pressure value of the refrigeration unit changes significantly, or if the electronic expansion valve fluctuates greatly, the first duration is increased and the second duration is decreased, allowing for a larger proportion of the spraying time. This reduces the fluctuations in the pressure value of the refrigeration unit or the fluctuations in the electronic expansion valve.

[0086] The method provided in this application embodiment monitors the pressure value of the refrigeration unit during its operation. When the pressure value exceeds a preset value, the spray module of the refrigeration unit is activated to spray the heat dissipation unit of the refrigeration unit using a preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration within each spray cycle are in a certain ratio, and the sum of the first and second durations is the duration of the spray cycle. The ratio under the preset spray mode is adjusted according to changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions. Thus, during the spray refrigeration process, by controlling the ratio of the spray duration to the non-spray duration in the spray cycle, the pressure of the refrigeration unit tends to be stable, and the refrigeration temperature tends to be stable, avoiding large fluctuations.

[0087] like Figure 8 As shown in the figure, this application embodiment provides a refrigeration device, including a processor 111, a communication interface 112, a memory 113, and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0088] Memory 113 is used to store computer programs;

[0089] In one embodiment of this application, the processor 111, when executing the computer program stored in the memory 113, implements the cooling method of the cooling device provided in any of the foregoing method embodiments.

[0090] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the refrigeration method of the refrigeration device provided in any of the foregoing method embodiments.

[0091] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0092] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0093] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0094] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A refrigeration method for a refrigeration device, characterized in that, include: During the operation of the refrigeration unit of the refrigeration equipment, the pressure value of the refrigeration unit is monitored; When the pressure value exceeds the preset value, the spray module of the refrigeration equipment is activated to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle. Adjust the ratio in the preset spray mode according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stable conditions. The step of activating the spray module of the refrigeration equipment to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode when the pressure value exceeds the preset value includes: in the preset spray mode, with a predetermined duration as the spray cycle, controlling the total spraying time of the spray module to be a first duration in each spray cycle, and keeping the total duration of stopping the spray to be a second duration. The step of controlling the total spraying time of the spray module to be a first duration within each spraying cycle, and maintaining the total spraying stop time to be a second duration, includes: dividing the first duration into M first sub-durations, and dividing the second duration into M second sub-durations, where M is a positive integer; controlling the spray module to spray the first sub-duration starting from the start time of the spraying cycle, and then stopping spraying the second sub-duration, until repeating this process M times to reach the end time of the spraying cycle.

2. The method according to claim 1, characterized in that, The step of adjusting the ratio under the preset spray mode according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions includes: When the change in pressure value is greater than the change threshold, or when the deviation of the electronic expansion valve of the refrigeration unit is greater than the preset deviation, the proportion of the preset spray mode is adjusted to a higher level. The higher the proportion of the preset spray mode, the greater the proportion of the first duration in the spray cycle.

3. The method according to claim 2, characterized in that, The step of activating the spray module of the refrigeration equipment to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode when the pressure value exceeds the preset value includes: The ratio of the preset spray mode is determined to be the first level ratio, or the ratio of the preset spray mode is determined to be the ratio used when the last spray ended; The spray module of the refrigeration equipment is activated to spray the heat dissipation unit in the preset spray mode.

4. The method according to claim 1, characterized in that, The step of adjusting the ratio under the preset spray mode according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stability conditions includes: When the change in pressure value is less than or equal to the change threshold, and the deviation of the electronic expansion valve of the refrigeration unit is less than or equal to the preset deviation, it is determined that the pressure value and the electronic expansion valve meet the stability condition. Determine the average value of the electronic expansion valve opening during the first spray cycle in which the electronic expansion valve sprays at the current ratio of the preset spray mode; The opening degree of the electronic expansion valve is fixed to the average value.

5. The method according to claim 1, characterized in that, When the pressure value exceeds a preset value and the spray module of the refrigeration equipment is activated to spray the heat dissipation unit of the refrigeration equipment using a preset spray mode, the method further includes: The compressor frequency of the refrigeration unit is set to a fixed value.

6. The method according to claim 5, characterized in that, The method further includes: When the temperature in the room where the refrigeration unit is located continues to drop, the proportion of the preset spray mode is adjusted to a lower level. The higher the proportion of the preset spray mode, the greater the proportion of the first duration in the spray cycle.

7. The method according to claim 1, characterized in that, The method further includes: After the spray module has sprayed for several spray cycles, control the spray module to stop spraying; Obtain the pressure value of the refrigeration unit; Based on the obtained pressure value of the refrigeration unit, determine whether to restart the spray module.

8. A spray module, characterized in that, include: The monitoring module is used to monitor the pressure value of the refrigeration unit during the operation of the refrigeration equipment. A startup module is used to start the spray module to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode when the pressure value exceeds the preset value. In the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle. An adjustment module is used to adjust the ratio in the preset spray mode according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stable conditions. The step of activating the spray module of the refrigeration equipment to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode when the pressure value exceeds the preset value includes: in the preset spray mode, with a predetermined duration as the spray cycle, controlling the total spraying time of the spray module to be a first duration in each spray cycle, and keeping the total duration of stopping the spray to be a second duration. The step of controlling the total spraying time of the spray module to be a first duration within each spraying cycle, and maintaining the total spraying stop time to be a second duration, includes: dividing the first duration into M first sub-durations, and dividing the second duration into M second sub-durations, where M is a positive integer; controlling the spray module to spray the first sub-duration starting from the start time of the spraying cycle, and then stopping spraying the second sub-duration, until repeating this process M times to reach the end time of the spraying cycle.

9. A refrigeration device, characterized in that, Includes the spray module as described in claim 8.

10. A refrigeration system for a refrigeration device, characterized in that, include: Refrigeration units, heat dissipation units, and spray modules; During the operation of the refrigeration unit, the pressure value of the refrigeration unit is monitored; When the pressure value exceeds the preset value, the spray module is activated to spray the heat dissipation unit of the refrigeration equipment using a preset spray mode. In the preset spray mode, the first spray duration and the second non-spray duration in each spray cycle are in a certain proportion, and the sum of the first duration and the second duration is the duration of the spray cycle. Adjust the ratio in the preset spray mode according to the changes in the pressure value and the electronic expansion valve until the pressure value and the electronic expansion valve meet the stable conditions. The step of activating the spray module of the refrigeration equipment to spray the heat dissipation unit of the refrigeration equipment in a preset spray mode when the pressure value exceeds the preset value includes: in the preset spray mode, with a predetermined duration as the spray cycle, controlling the total spraying time of the spray module to be a first duration in each spray cycle, and keeping the total duration of stopping the spray to be a second duration. The step of controlling the total spraying time of the spray module to be a first duration within each spraying cycle, and maintaining the total spraying stop time to be a second duration, includes: dividing the first duration into M first sub-durations, and dividing the second duration into M second sub-durations, where M is a positive integer; controlling the spray module to spray the first sub-duration starting from the start time of the spraying cycle, and then stopping spraying the second sub-duration, until repeating this process M times to reach the end time of the spraying cycle.

11. An electronic device, characterized in that, include: The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus. The memory is used to store computer programs; the processor is used to execute the computer programs to implement the method described in any one of claims 1-7.

12. A storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the method described in any one of claims 1-7.

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