Refrigeration control method, refrigeration control device and air conditioner

Abstract

The embodiment of the present application provides a refrigeration control method, a refrigeration control device and an air conditioner. The refrigeration control method comprises the following steps: when receiving an instruction of entering a fast refrigeration mode, controlling the air conditioner to enter the fast refrigeration mode; acquiring the relative humidity of indoor air; when the relative humidity is lower than a preset relative humidity, then opening the spraying device according to a preset spraying amount, wherein the lower the relative humidity is, the greater the spraying amount of the spraying device is. According to the embodiment, the corresponding spraying amount of the spraying device is adjusted according to the change of the relative humidity of indoor air, so that the moisture content of air (i.e. inlet air) at the air inlet of the air conditioner is increased, thereby increasing the enthalpy value of the inlet air, and finally improving the refrigeration capacity of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a refrigeration control method, a refrigeration control device, and an air conditioner. Background Technology

[0002] Currently, during air conditioning operation, as the outdoor ambient temperature rises, the system load gradually increases, and the system pressure and exhaust temperature also gradually rise. Simultaneously, the compressor operating current gradually increases, and the heat generated by power components such as the outdoor unit's inverter controller increases. When these conditions reach the air conditioner's set protection conditions, the air conditioner's control program will protect its own operational safety and reliability by limiting or reducing the compressor's operating frequency. However, because the compressor's operating frequency is limited, the higher the outdoor ambient temperature, the worse the air conditioner's cooling effect; that is, the indoor room temperature cannot drop or drops very slowly, thus reducing the air conditioner's cooling comfort. Summary of the Invention

[0003] This invention provides a refrigeration control method, a control device, and an air conditioner, all of which address the problem of poor cooling capacity of existing air conditioners in high-temperature environments.

[0004] In a first aspect, embodiments of the present invention provide a cooling control method applied to an air conditioner, the air conditioner including an air conditioner body and an air inlet disposed on the air conditioner body, the air conditioner further including a spray device disposed on the air inlet, the cooling control method including:

[0005] When a command to enter rapid cooling mode is received, the air conditioner is controlled to enter rapid cooling mode;

[0006] Obtain the relative humidity of indoor air;

[0007] When the relative humidity is lower than the preset relative humidity, the spray device is turned on according to the preset spray volume. The lower the relative humidity, the greater the spray volume of the spray device.

[0008] Secondly, embodiments of the present invention also provide a control device for improving high-temperature cooling in air conditioners, used to implement the cooling control method described above, the control device comprising:

[0009] A rapid cooling unit is used to control the air conditioner to enter the rapid cooling mode when a command to enter the rapid cooling mode is received.

[0010] A relative humidity acquisition unit is used to acquire the relative humidity of indoor air;

[0011] A spray unit is used to activate the spray device according to a preset spray volume when the relative humidity is lower than a preset relative humidity, wherein the lower the relative humidity, the greater the spray volume of the spray device.

[0012] Thirdly, embodiments of the present invention also provide an air conditioner, including an air conditioner body and an air inlet disposed on the air conditioner body, the air conditioner further including a spray device disposed on the air inlet and a control device as described above.

[0013] This invention provides a refrigeration control method, control device, and air conditioner. The refrigeration control method includes: controlling the air conditioner to enter a rapid refrigeration mode upon receiving an instruction to do so; acquiring the relative humidity of the indoor air; and activating the spray device at a preset spray volume when the relative humidity is lower than a preset relative humidity, wherein the lower the relative humidity, the greater the spray volume of the spray device. This embodiment adjusts the corresponding spray volume of the spray device according to changes in the relative humidity of the indoor air, increasing the moisture content of the air at the air inlet of the air conditioner (i.e., the incoming air), thereby increasing the enthalpy of the incoming air and ultimately improving the cooling capacity of the air conditioner. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A flowchart of a refrigeration control method provided in an embodiment of the present invention;

[0016] Figure 2 This is a sub-flowchart of a refrigeration control method provided in an embodiment of the present invention;

[0017] Figure 3 This is another sub-flowchart of a refrigeration control method provided in an embodiment of the present invention;

[0018] Figure 4 This is another sub-flowchart of a refrigeration control method provided in an embodiment of the present invention;

[0019] Figure 5 This is another sub-flowchart of a refrigeration control method provided in an embodiment of the present invention;

[0020] Figure 6 This is a logic diagram of a refrigeration control method provided in an embodiment of the present invention;

[0021] Figure 7A flowchart of a refrigeration control method provided in another embodiment of the present invention;

[0022] Figure 8 A logic diagram of a refrigeration control method provided in another embodiment of the present invention;

[0023] Figure 9 This is a schematic block diagram of a refrigeration control device provided in an embodiment of the present invention;

[0024] Figure 10 This is a diagram of the internal structure of an air conditioner provided in an embodiment of the present invention.

[0025] Explanation of the markings in the image:

[0026] 1. Air conditioner body; 11. Air inlet; 12. Spray device; 121. Atomizing nozzle; 122. Spray pipe; 123. Water supply pipe; 700. Refrigeration control device; 710. Rapid cooling unit; 720. Relative humidity acquisition unit; 730. Spray unit. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] Please see below. Figure 1This invention provides a cooling control method applied to an air conditioner. The air conditioner includes an air conditioner body and an air inlet disposed on the air conditioner body. The air conditioner also includes a spray device disposed on the air inlet. The cooling control method includes steps S101-S103:

[0032] S101. When a command to enter the rapid cooling mode is received, the air conditioner is controlled to enter the rapid cooling mode.

[0033] S102. Obtain the relative humidity of the indoor air;

[0034] S103. When the relative humidity is lower than the preset relative humidity, the spray device is turned on according to the preset spray volume, wherein the lower the relative humidity, the greater the spray volume of the spray device.

[0035] In this embodiment, when the air conditioner is running in cooling mode, to address the insufficient cooling capacity of the air conditioner under high-temperature cooling conditions, it is necessary to control the air conditioner to enter a rapid cooling mode to improve its cooling capacity. There are several ways to trigger the command to enter the rapid cooling mode; this invention provides two methods: one is to determine whether to trigger the command to enter the rapid cooling mode based on the indoor temperature difference, and the other is to determine whether to trigger the command to enter the rapid cooling mode based on the outdoor temperature difference. These two methods will be described in detail below.

[0036] like Figure 2 As shown, the refrigeration control method includes S201-S202:

[0037] S201. Obtain the indoor temperature and calculate the difference between the indoor temperature and the preset indoor temperature;

[0038] S202. If the difference is greater than or equal to a preset difference, then a command to enter the rapid cooling mode is triggered.

[0039] In this embodiment, when the cooling mode is running, as the indoor temperature rises, in order to ensure sufficient cooling capacity, a command is set to trigger the entry into the rapid cooling mode, i.e., the conditions for entering the rapid cooling mode are set. Specifically, the indoor temperature is first acquired, and the difference between the indoor temperature and the preset indoor temperature is calculated. When the difference is greater than or equal to the preset difference, the command to enter the rapid cooling mode is triggered, controlling the air conditioner to enter the rapid command mode.

[0040] like Figure 3 As shown, the refrigeration control method includes S301-S302:

[0041] S301. Obtain the outdoor temperature and the indoor heat exchanger coil temperature of the air conditioner;

[0042] S302. If the outdoor temperature is greater than or equal to the preset outdoor temperature or if the indoor heat exchanger coil temperature is greater than the preset indoor heat exchanger temperature, then a command to enter the rapid cooling mode is triggered.

[0043] In this embodiment, the outdoor temperature and the coil temperature of the indoor heat exchanger of the air conditioner are first obtained. The outdoor temperature is then compared with a preset outdoor temperature, or the coil temperature of the indoor heat exchanger is compared with a preset indoor heat exchanger temperature. When the outdoor temperature is lower than the preset outdoor temperature or the coil temperature of the indoor heat exchanger is lower than or equal to the preset indoor heat exchanger temperature, it indicates that the demand for cooling capacity is low and the current air conditioning cooling effect is good, and the air conditioner operates in normal cooling mode. When the outdoor temperature is higher than or equal to the preset outdoor temperature or the coil temperature of the indoor heat exchanger is higher than the preset indoor heat exchanger temperature, a command to enter the rapid cooling mode is triggered, controlling the air conditioner to enter the rapid cooling mode. The preset outdoor temperature can be 35°C, which is the outdoor ambient temperature specified in the national standard for cooling test conditions, and the preset indoor heat exchanger temperature can be 16°C.

[0044] Both of the above embodiments can trigger the command to enter the rapid cooling mode. The present invention can choose one of the methods to determine whether the command to enter the rapid cooling mode is triggered; or it can choose both methods to determine whether the command to enter the rapid cooling mode is triggered. In this case, as long as any one of the triggering conditions is met, the command to enter the rapid cooling mode can be triggered.

[0045] After the air conditioner enters rapid cooling mode, the relative humidity of the indoor air needs to be obtained. Specifically, the relative humidity can be calculated based on the dry-bulb temperature and wet-bulb temperature. The formula is: Relative Humidity = (Dry-bulb Temperature - Wet-bulb Temperature) / (25℃ - Wet-bulb Temperature) × 100%, where 25℃ is the standard wet-bulb temperature, dry-bulb temperature refers to the temperature at which there is no moisture in the air, and wet-bulb temperature refers to the temperature measured with a hygrometer. In this embodiment, dry-bulb temperature refers to the indoor temperature, and wet-bulb temperature refers to the ambient humidity, i.e., indoor humidity. Therefore, before obtaining the relative humidity of the indoor air, the indoor temperature and humidity are first obtained, and then substituted into the relative humidity formula to calculate the relative humidity. This is then compared with the preset relative humidity. When the relative humidity is lower than the preset relative humidity, the corresponding spray volume of the spray device is activated. The lower the relative humidity, the drier the air, and the greater the required spray volume. This increases the humidity of the air at the air inlet, increases the moisture content of the incoming air, thereby increasing the enthalpy of the incoming air and improving the cooling capacity.

[0046] Specifically, such as Figure 4 As shown, S103 includes steps S401-S402:

[0047] S401. Compare the relative humidity with a plurality of preset relative humidity ranges; wherein each relative humidity range corresponds to a preset spray volume, and the lower the relative humidity range, the greater the preset spray volume.

[0048] S402. Determine the relative humidity range to which the relative humidity belongs, determine the corresponding preset spray volume based on the relative humidity range, and activate the spray device using the preset spray volume.

[0049] In this embodiment, multiple relative humidity ranges are preset, and each relative humidity range is set with a corresponding spray volume. When the obtained relative humidity is within the corresponding relative humidity range, the spray device is turned on and a corresponding spray volume is generated to increase the humidity of the incoming air. Specifically, four relative humidity ranges can be set: relative humidity ≥ 50%, 50% < relative humidity ≤ 40%, 40% < relative humidity ≤ 30%, and relative humidity < 30%. When relative humidity ≥ 50%, the indoor environment has sufficient relative humidity, and the spray device is not turned on. When relative humidity < 50%, the indoor environment begins to dry, and the spray device is turned on. Furthermore, when 50% < relative humidity ≤ 40%, the indoor environment is somewhat dry, so the corresponding spray volume can be set to 1 / 4. When 40% < relative humidity ≤ 30%, the indoor environment is relatively dry, so the corresponding spray volume can be set to 1 / 2. When relative humidity < 30%, the indoor environment is very dry, requiring increased humidity, so the corresponding spray volume is set to 1. Here, 1 can represent the maximum spray volume or the upper limit of the spray volume. The aforementioned 1 / 2 and 1 / 4 refer to the proportion relative to the maximum spray volume. The number of humidity ranges can be set according to the specific scenario, and similarly, the corresponding spray volume for each humidity range is also set according to the specific scenario.

[0050] More specifically, adjusting the spray volume can be achieved by setting speed levels on the spray device, each level corresponding to a relative humidity range. When the relative humidity falls within a certain range, the spray volume is adjusted to the corresponding speed level. Alternatively, multiple atomizing nozzles can be installed on the spray device. For example... Figure 5 As shown, S402 includes steps S501-S502:

[0051] S501. Determine the required number of atomizing nozzles based on the preset spray volume;

[0052] S502, turn on the corresponding number of atomizing nozzles.

[0053] In this embodiment, each spray volume corresponds to the number of atomizing nozzles that need to be activated. Once the required spray volume is determined, the corresponding number of atomizing nozzles can be activated. For example, eight atomizing nozzles are installed on the spray device, and these eight nozzles are evenly distributed on both sides of the air inlet, meaning there are four atomizing nozzles on each side of the air inlet. These four atomizing nozzles are arranged sequentially along the side of the air inlet. When 50% < relative humidity ≤ 40%, the required spray volume is 1 / 4, so two atomizing nozzles are activated. When 40% < relative humidity ≤ 30%, the required spray volume is 1 / 2, so four atomizing nozzles are activated. When relative humidity < 30%, the required spray volume is 1, meaning all eight atomizing nozzles are activated. When the atomizing nozzle is turned on, it is not limited to which atomizing nozzle is turned on, as long as the corresponding number of atomizing nozzles are turned on is met. For example, when turning on 2 atomizing nozzles, you can choose to turn on 2 atomizing nozzles on the same horizontal line of the air inlet, or you can choose to turn on 2 atomizing nozzles on the same vertical line, or you can choose 2 atomizing nozzles on different horizontal lines and different vertical lines.

[0054] The entire control flow of the above embodiments is as follows: Figure 6 As shown, when the difference between the indoor temperature and the preset temperature is less than the preset difference, it indicates that the air conditioner is cooling well and is operating in normal cooling mode. When the difference between the indoor temperature and the preset temperature is greater than or equal to the preset difference, it is operating in fast cooling mode.

[0055] The refrigeration control method further includes:

[0056] When the relative humidity is lower than the preset relative humidity, the speed of the indoor fan of the air conditioner is increased to the preset speed.

[0057] In this embodiment, when the relative humidity is lower than the preset relative humidity, it is necessary not only to turn on the spray device and adjust the spray volume for the corresponding humidity range, but also to increase the speed of the air conditioner's indoor fan to the preset speed. Once the indoor fan speed is already at the preset speed, it remains unchanged. Increasing the indoor fan speed accelerates airflow, thereby enhancing indoor heat exchange and enabling the air conditioner to achieve rapid cooling. Specifically, when the relative humidity is ≥50%, the indoor relative humidity is sufficient. The spray device is kept off (i.e., not turned on). To achieve rapid cooling, the indoor fan speed can still be increased to the preset speed. If the indoor fan speed is already at the preset speed, it remains unchanged. When the relative humidity is <50%, the spray device is turned on, and the indoor fan speed is increased to the preset speed. Similarly, if the indoor fan speed is already at the preset speed, it remains unchanged. The preset speed can be the highest speed setting in normal cooling mode (i.e., the highest speed setting in normal cooling mode).

[0058] Specifically, such as Figure 7As shown, the refrigeration control method also includes S601-S604:

[0059] S601. After the air conditioner enters the rapid cooling mode, obtain the operating parameters of the air conditioner and the temperature of the outdoor heat exchanger coil.

[0060] S602. Compare the temperature of the outdoor heat exchanger coil with the preset protection temperature;

[0061] S603. If the temperature of the outdoor heat exchanger coil is lower than the preset protection temperature, the operating frequency of the air conditioner compressor is directly increased to the target frequency, and the speed of the air conditioner's outdoor fan is increased to the target speed.

[0062] S604. If the temperature of the outdoor heat exchanger coil is greater than or equal to the preset protection temperature, the speed of the outdoor fan is controlled to the target speed, and the opening of the electronic expansion valve of the air conditioner is increased to raise the frequency of the air conditioner compressor to the target frequency.

[0063] In this embodiment, when the air conditioner enters the rapid command mode, it first acquires the air conditioner's operating parameters and the outdoor heat exchanger coil temperature. The operating parameters include one or more of the following: indoor fan speed, outdoor fan speed, compressor operating frequency, and electronic expansion valve opening. Then, the outdoor heat exchanger coil temperature is compared with a preset protection temperature. If the outdoor heat exchanger coil temperature is lower than the preset protection temperature, the compressor's operating frequency is increased to a target frequency. This target frequency is the frequency corresponding to the optimal cooling capacity measured under different operating conditions based on relevant performance tests, and this frequency is higher than the frequency of the air conditioner's normal cooling mode. Simultaneously, the outdoor fan speed is increased to a target speed, which is also the outdoor fan speed corresponding to the optimal cooling capacity measured under different operating conditions based on relevant performance tests, and this speed is higher than the outdoor fan speed of the air conditioner's normal cooling mode.

[0064] When the outdoor heat exchanger coil temperature is greater than or equal to the preset protection temperature, the compressor operating frequency drops due to overload protection, and the actual frequency cannot reach the target frequency, resulting in insufficient cooling capacity. Therefore, the outdoor fan speed can be increased to the target speed to enhance the heat exchange effect of the condenser in the air conditioner, thereby reducing the outdoor heat exchanger coil temperature. This allows the compressor operating frequency to continue to increase towards the target frequency. If, during the frequency increase process, the compressor operating frequency has not yet reached the target frequency, but the outdoor heat exchanger coil temperature has reached the preset protection temperature, the opening of the air conditioner's electronic expansion valve can be increased simultaneously to allow the compressor to continue increasing its frequency to the target frequency, thereby improving cooling capacity. The preset protection temperature can be 60℃.

[0065] The entire control flow of the above embodiments is as follows: Figure 8As shown, when the outdoor temperature is <35℃ or the indoor heat exchanger coil temperature is ≤ preset indoor heat exchanger temperature, it indicates that the user's demand for cooling capacity is small, and the air conditioner operates in normal cooling mode. When the outdoor temperature is ≥35℃ or the indoor heat exchanger coil temperature is > preset indoor heat exchanger temperature, it operates in rapid cooling mode.

[0066] This invention also provides a refrigeration control device for implementing the refrigeration control method described in the foregoing embodiments, such as... Figure 9 As shown, the refrigeration control device 700 includes:

[0067] The rapid cooling unit 710 is used to control the air conditioner to enter the rapid cooling mode when it receives an instruction to enter the rapid cooling mode.

[0068] The relative humidity acquisition unit 720 is used to acquire the relative humidity of indoor air;

[0069] The spray unit 730 is used to activate the spray device according to a preset spray volume when the relative humidity is lower than the preset relative humidity, wherein the lower the relative humidity, the greater the spray volume of the spray device.

[0070] In this embodiment, the refrigeration control device 700 is used to control a refrigeration control method as described in the foregoing embodiments. The specific implementation process can be referred to in the foregoing embodiments, and will not be repeated here.

[0071] This invention also provides an air conditioner, such as... Figure 10 As shown, the air conditioner includes an air conditioner body 1 and an air inlet 11 disposed on the air conditioner body 1. The air conditioner also includes a spray device 12 disposed on the air inlet 11 and a refrigeration control device 700 as described in the previous embodiment. In addition, the air conditioner also includes conventional devices such as an indoor heat exchanger, an outdoor heat exchanger, an indoor fan, an outdoor fan, a compressor, and an electronic expansion valve. The connection relationships of these conventional devices can be referred to the prior art.

[0072] In this embodiment, the spray device 12 is used to increase the humidity of the incoming air at the air inlet of the indoor unit of the air conditioner, thereby increasing the moisture content of the incoming air. The refrigeration control device 700 is used to control the air conditioner to trigger the entry into the rapid cooling mode according to the refrigeration control method of the aforementioned embodiment, thereby improving the cooling capacity of the air conditioner. Specifically, after the air conditioner enters the rapid cooling mode, its cooling capacity is improved by activating the spray device, or by adjusting the operating parameters of the indoor fan, outdoor fan, compressor, and electronic expansion valve. For more detailed implementation processes, please refer to the aforementioned embodiment, which will not be repeated here.

[0073] Specifically, such as Figure 10As shown, the spray device 12 includes multiple atomizing nozzles 121, a spray pipe 122, and a water supply pipe 123. The spray pipe 122 is located on the side of the air inlet 11. The multiple atomizing nozzles 121 are arranged sequentially along the spray pipe 122. One end of the water supply pipe 123 is connected to the spray pipe 122, and the other end of the water supply pipe 123 is connected to the outside or to the condensate collection device of the air conditioner.

[0074] In this embodiment, the air conditioner body is equipped with a spray device 12, which includes a spray pipe 122 and a water supply pipe 123. The spray pipe 122 is respectively arranged on both sides of the inner side of the air inlet to increase the humidity at the air inlet of the indoor unit of the air conditioner. The spray pipe 122 is equipped with multiple atomizing nozzles 121. Specifically, four nozzles can be arranged on each side of the air inlet, evenly distributed on both sides of the air inlet of the indoor unit. The amount of spray is determined by the number of nozzles that are turned on. The water in the spray device 12 can be obtained by connecting to the outside through the water supply pipe 123. For example, tap water can be introduced from a faucet near the location of the air conditioner through the water supply pipe 123. The water in the spray device 12 can also be obtained by connecting to the air conditioner's condensate collection device. For example, the air conditioner's condensate can be discharged from the drain pipe, filtered by the filter device, and then introduced into the water supply pipe 123.

[0075] This invention proposes a refrigeration control method, a refrigeration control device, and an air conditioner. By increasing the humidity at the air inlet of the indoor unit of the air conditioner, the partial pressure of water vapor in the incoming air is increased, thereby increasing the moisture content of the incoming air, which in turn increases the enthalpy value of the incoming air and ultimately improves the cooling capacity. At the same time, based on the actual ambient temperature and humidity, the compressor operating frequency, the opening of the electronic expansion valve, the speed of the indoor fan, and the speed of the outdoor fan are intelligently adjusted to solve the problem of insufficient air conditioning capacity caused by compressor frequency reduction under high-temperature cooling conditions.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0077] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A refrigeration control method applied to an air conditioner, the air conditioner comprising an air conditioner body and an air inlet disposed on the air conditioner body, characterized in that, The air conditioner also includes a spray device disposed at the air inlet, and the cooling control method includes: When a command to enter rapid cooling mode is received, the air conditioner is controlled to enter rapid cooling mode; Obtain the relative humidity of indoor air; When the relative humidity is lower than the preset relative humidity, the spray device is turned on according to the preset spray volume. The lower the relative humidity, the greater the spray volume of the spray device. When the relative humidity is lower than the preset relative humidity, the speed of the indoor fan of the air conditioner is increased to the preset speed; After the air conditioner enters the rapid cooling mode, the operating parameters of the air conditioner and the temperature of the outdoor heat exchanger coil are acquired. The outdoor heat exchanger coil temperature is compared with a preset protection temperature. If the outdoor heat exchanger coil temperature is lower than the preset protection temperature, the compressor operating frequency of the air conditioner is directly controlled to increase to the target frequency, and the outdoor fan speed is increased to the target speed. If the outdoor heat exchanger coil temperature is greater than or equal to the preset protection temperature, the outdoor fan speed is controlled to the target speed to reduce the outdoor heat exchanger coil temperature, causing the compressor operating frequency to increase towards the target frequency. During the frequency increase process, if the outdoor heat exchanger coil temperature reaches the preset protection temperature again and the compressor operating frequency does not reach the target frequency, the opening of the air conditioner's electronic expansion valve is increased to cause the compressor to increase to the target frequency.

2. The refrigeration control method according to claim 1, characterized in that, The step of activating the spray device according to the preset spray volume includes: The relative humidity is compared with a plurality of preset relative humidity ranges; wherein each relative humidity range corresponds to a preset spray volume, and the lower the relative humidity range, the greater the preset spray volume. Determine the relative humidity range to which the relative humidity belongs, determine the corresponding preset spray volume based on the relative humidity range, and activate the spray device using the preset spray volume.

3. The refrigeration control method according to claim 2, characterized in that, The spraying device includes multiple atomizing nozzles disposed at the air inlet, and activating the spraying device by the preset spray volume includes: The required number of atomizing nozzles is determined by the preset spray volume; Turn on the corresponding number of atomizing nozzles.

4. The refrigeration control method according to claim 1, characterized in that, Also includes: Obtain the indoor temperature and calculate the difference between the indoor temperature and the preset indoor temperature; If the difference is greater than or equal to a preset difference, a command to enter the rapid cooling mode is triggered.

5. The refrigeration control method according to claim 1, characterized in that, Also includes: Obtain the outdoor temperature and the indoor heat exchanger coil temperature of the air conditioner. If the outdoor temperature is greater than or equal to the preset outdoor temperature, or if the indoor heat exchanger coil temperature is greater than the preset indoor heat exchanger temperature, then a command to enter the rapid cooling mode is triggered.

6. A refrigeration control device for implementing the refrigeration control method as described in any one of claims 1-5, characterized in that, The refrigeration control device includes: A rapid cooling unit is used to control the air conditioner to enter the rapid cooling mode when a command to enter the rapid cooling mode is received. A relative humidity acquisition unit is used to acquire the relative humidity of indoor air; A spray unit is used to activate the spray device according to a preset spray volume when the relative humidity is lower than a preset relative humidity, wherein the lower the relative humidity, the greater the spray volume of the spray device; The refrigeration control device is also used to increase the speed of the indoor fan of the air conditioner to a preset speed when the relative humidity is lower than the preset relative humidity; After the air conditioner enters the rapid cooling mode, the operating parameters of the air conditioner and the temperature of the outdoor heat exchanger coil are acquired. The outdoor heat exchanger coil temperature is compared with a preset protection temperature. If the outdoor heat exchanger coil temperature is lower than the preset protection temperature, the compressor operating frequency of the air conditioner is directly controlled to increase to the target frequency, and the outdoor fan speed is increased to the target speed. If the outdoor heat exchanger coil temperature is greater than or equal to the preset protection temperature, the outdoor fan speed is controlled to the target speed to reduce the outdoor heat exchanger coil temperature, causing the compressor operating frequency to increase towards the target frequency. During the frequency increase process, if the outdoor heat exchanger coil temperature reaches the preset protection temperature again and the compressor operating frequency does not reach the target frequency, the opening of the air conditioner's electronic expansion valve is increased to cause the compressor to increase to the target frequency.

7. An air conditioner, characterized in that, The air conditioner includes an air conditioner body and an air inlet disposed on the air conditioner body. The air conditioner also includes a spray device disposed on the air inlet and a refrigeration control device as described in claim 6.

8. The air conditioner according to claim 7, characterized in that, The spraying device includes multiple atomizing nozzles, a spray pipe, and a water supply pipe. The spray pipe is located on the side of the air inlet, and the multiple atomizing nozzles are arranged sequentially along the spray pipe. One end of the water supply pipe is connected to the spray pipe, and the other end of the water supply pipe is connected to the outside or to the condensate collection device of the air conditioner.

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