Air conditioning unit, control method and device thereof, indoor unit, medium and program product

Abstract

The present disclosure relates to an air conditioning unit, a control method and device thereof, an indoor unit, a medium and a program product. The control method of the air conditioning unit comprises: obtaining cabin temperatures of all cabins; adjusting a target temperature of an air conditioning unit for each cabin according to a size relationship between the cabin temperature of the cabin and a cabin temperature set value; and controlling an outdoor unit of the air conditioning unit according to a size relationship between the target temperature before adjustment and a current monitoring temperature and a size relationship between the current target temperature and the current monitoring temperature. The present disclosure simultaneously considers the size relationship between the target temperature before adjustment and the current monitoring temperature and the size relationship between the current target temperature and the current monitoring temperature for the first time after the target temperature is automatically adjusted, and controls the outdoor unit. Through the linkage of the indoor unit and the outdoor unit, the present disclosure can more flexibly and effectively and intelligently make full use of the adjustment capability of the air conditioning unit on the cabin environment and more accurately realize the control of the unit temperature by sending control instructions from the indoor unit to the outdoor unit.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning technology, and in particular to an air conditioning unit and its control method and device, indoor unit, medium and program product. Background Technology

[0002] LNG (Liquefied Natural Gas) ships are vessels specifically designed to transport liquefied natural gas. They are among the most difficult ships to build in the world, with high technical requirements and high costs. Therefore, it is particularly important to ensure that the indoor environment required for the LNG cargo tanks is met in any climate. Summary of the Invention

[0003] The inventors discovered through research that there is no good control method for the relevant technology that can meet the indoor environment required for manufacturing LNG ship cargo tanks in any climate.

[0004] In view of at least one of the above technical problems, this disclosure provides an air conditioning unit and its control method and apparatus, indoor unit, medium and program products, which can meet the indoor environment required for manufacturing LNG ship cargo tanks in any climatic environment.

[0005] According to one aspect of this disclosure, a control method for an air conditioning unit is provided, comprising:

[0006] Obtain the cabin temperature of all compartments;

[0007] The target temperature of the air conditioning unit used in the cabin is adjusted according to the relationship between the cabin temperature and the cabin temperature set value of each cabin.

[0008] The outdoor unit of the air conditioning unit is controlled based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature.

[0009] In some embodiments of this disclosure, controlling the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature, includes:

[0010] Based on the relationship between the target temperature before adjustment and the current monitored temperature, the current operating status of the outdoor unit is determined;

[0011] Based on the relationship between the current target temperature and the current monitored temperature, the current operating conditions that the outdoor unit currently meets are determined;

[0012] The outdoor unit of the air conditioning unit is controlled according to its current operating status and the currently met operating conditions.

[0013] In some embodiments of this disclosure, the cabin temperature setpoint includes at least one of a cabin temperature upper limit and a cabin temperature lower limit.

[0014] In some embodiments of this disclosure, adjusting the target temperature of the air conditioning unit for the compartment based on the relationship between the compartment temperature and the compartment temperature setpoint includes at least one of the following steps:

[0015] If the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature, the target temperature shall be reduced.

[0016] If the temperature of at least one compartment is detected to be below the lower limit of the compartment temperature, the target temperature is increased.

[0017] In some embodiments of this disclosure, reducing the target temperature when the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature includes: reducing the target temperature when the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature within a predetermined continuous time period, and when the temperature of any compartment is not detected to be lower than the lower limit of the compartment temperature.

[0018] In some embodiments of this disclosure, increasing the target temperature when the temperature of at least one compartment is detected to be below the lower limit of ...

[0019] In some embodiments of this disclosure, adjusting the target temperature of the air conditioning unit for the compartment based on the relationship between the compartment temperature and the set compartment temperature further includes:

[0020] If, within a predetermined continuous time period, the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature and the temperature of at least one compartment is detected to be lower than the lower limit of the compartment temperature, the absolute value of the first difference is determined based on the difference between the highest compartment temperature and the average compartment temperature of all compartments.

[0021] The absolute value of the second difference is determined based on the difference between the lowest and average cabin temperatures of all cabins.

[0022] The target temperature is adjusted based on the relationship between the absolute values ​​of the first and second differences.

[0023] In some embodiments of this disclosure, adjusting the target temperature based on the relationship between the absolute values ​​of the first and second differences includes at least one of the following steps:

[0024] If the absolute value of the first difference is less than the absolute value of the second difference, the target temperature is reduced.

[0025] If the absolute value of the first difference is greater than the absolute value of the second difference, the target temperature is increased.

[0026] In some embodiments of this disclosure, reducing the target temperature includes: reducing the target temperature by a target temperature adjustment value.

[0027] In some embodiments of this disclosure, increasing the target temperature includes: increasing the target temperature by a target temperature adjustment value.

[0028] In some embodiments of this disclosure, the target temperature is a target supply air temperature or a target return air temperature.

[0029] In some embodiments of this disclosure, when the target temperature is the target supply air temperature, the current monitored temperature is the current supply air temperature.

[0030] In some embodiments of this disclosure, when the target temperature is the target return air temperature, the current monitored temperature is the current return air temperature.

[0031] In some embodiments of this disclosure, when the air conditioning unit is in cooling mode, the target temperature is the cooling target temperature.

[0032] In some embodiments of this disclosure, when the air conditioning unit is in heating mode, the target temperature is the heating target temperature.

[0033] In some embodiments of this disclosure, controlling the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature, includes:

[0034] When the target temperature is the target supply air temperature, corresponding control commands are sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature.

[0035] In some embodiments of this disclosure, in cooling mode when the target temperature is lowered, or in heating mode when the target temperature is raised, sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature, includes at least one of the following steps:

[0036] If a standby command or load reduction command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the loading conditions for the outdoor unit are met based on the relationship between the current target supply air temperature and the current supply air temperature, a loading command is sent to the outdoor unit.

[0037] If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a loading command has been sent to the outdoor unit and the outdoor unit is in a loading state, then, based on the relationship between the current target supply air temperature and the current supply air temperature, it is determined that the loading conditions for the outdoor unit are met, and a loading command is sent to the outdoor unit, increasing the duration of the loading command being sent to the outdoor unit.

[0038] In some embodiments of this disclosure, in cooling mode with the target temperature increased, or in heating mode with the target temperature decreased, sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature, includes at least one of the following steps:

[0039] If a load command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and if the outdoor unit is deemed to meet the load reduction conditions based on the relationship between the current target supply air temperature and the current supply air temperature, a load reduction command is sent to the outdoor unit; if the outdoor unit is deemed to meet the standby conditions, a standby command is sent to the outdoor unit.

[0040] If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a standby command has been sent to the outdoor unit and the outdoor unit is in standby mode, then, based on the relationship between the current target supply air temperature and the current supply air temperature, it is determined that the standby conditions for the outdoor unit are met, and a standby command is sent to the outdoor unit to control the outdoor unit to maintain the standby mode.

[0041] If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a load reduction command has been sent to the outdoor unit and the outdoor unit is in a load reduction state, then, based on the relationship between the current target supply air temperature and the current supply air temperature, if it is determined that the outdoor unit load reduction condition is met, a load reduction command will continue to be sent to the outdoor unit; if it is determined that the outdoor unit standby condition is met, a standby command will be sent to the outdoor unit.

[0042] In some embodiments of this disclosure, the control method for the air conditioning unit further includes:

[0043] The opening degree of the fresh air valve is controlled based on the relationship between the current target temperature and the current monitored temperature.

[0044] In some embodiments of this disclosure, controlling the opening degree of the fresh air valve based on the relationship between the current target temperature and the current monitored temperature includes:

[0045] When the target temperature is the target supply air temperature, the opening degree of the fresh air valve is controlled according to the relationship between the current target supply air temperature and the current supply air temperature.

[0046] In some embodiments of this disclosure, controlling the opening degree of the fresh air valve based on the relationship between the current target supply air temperature and the current supply air temperature includes at least one of the following steps:

[0047] In the case of cooling mode, the target cooling temperature has been adjusted to the lower limit of the target cooling temperature, the outdoor unit capacity has reached its maximum and continues for a predetermined duration, if at least one compartment temperature is detected to be lower than the lower limit of the compartment temperature within a predetermined continuous period of time, and no compartment temperature is detected to be higher than the upper limit of the compartment temperature, then the opening of the fresh air valve will be reduced.

[0048] In heating mode, if the outdoor unit has been shut down for a predetermined duration, and if at least one compartment temperature is detected to be higher than the upper limit of the compartment temperature within the predetermined continuous time, and no compartment temperature is detected to be lower than the lower limit of the compartment temperature, then the opening of the fresh air valve will be increased.

[0049] In some embodiments of this disclosure, reducing the opening of the fresh air valve includes reducing the opening of the fresh air valve by a predetermined adjustment amount every predetermined valve adjustment time.

[0050] In some embodiments of this disclosure, increasing the opening of the fresh air valve includes increasing the opening of the fresh air valve by a predetermined adjustment amount every predetermined valve adjustment time.

[0051] In some embodiments of this disclosure, obtaining the cabin temperature of all cabins includes:

[0052] The cabin temperature of all compartments is obtained after a predetermined temperature detection time.

[0053] In some embodiments of this disclosure, the compartment is a liquid cargo tank used in the manufacture of liquefied natural gas (LNG) carriers.

[0054] According to another aspect of this disclosure, a control device is provided, comprising:

[0055] The compartment temperature acquisition module is configured to acquire the compartment temperature of all compartments, wherein the compartments are cargo tanks used in the manufacture of liquefied natural gas carriers.

[0056] The target temperature adjustment module is configured to adjust the target temperature of the air conditioning unit used in the compartment based on the relationship between the compartment temperature of each compartment and the compartment temperature setpoint.

[0057] The air conditioning unit control module is configured to control the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature.

[0058] According to another aspect of this disclosure, a control device is provided, comprising:

[0059] The memory is configured to store instructions; and

[0060] The processor is configured to execute the instructions, causing the control device to implement the control method as described in any of the above embodiments.

[0061] According to another aspect of this disclosure, an indoor unit is provided, including a control device as described in any of the above embodiments.

[0062] According to another aspect of this disclosure, an air conditioning unit is provided, including an outdoor unit and an indoor unit as described in any of the above embodiments.

[0063] According to another aspect of this disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions that, when executed by a processor, implement the control method as described in any of the above embodiments.

[0064] According to another aspect of this disclosure, a computer program product is provided, comprising a computer program, wherein the computer program, when executed by a processor, implements the control method as described in any of the above embodiments.

[0065] This disclosure, for the first time, considers the relationship between the target temperature before adjustment and the current monitored temperature, as well as the relationship between the current target temperature and the current monitored temperature, to control the outdoor unit after the target temperature is automatically adjusted. This disclosure, through the linkage of indoor and outdoor units and the sending of control commands from the indoor unit to the outdoor unit, can more flexibly, effectively, and intelligently make full use of the air conditioning unit's ability to regulate the cabin environment and more accurately control the unit's temperature. Attached Figure Description

[0066] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0067] Figure 1 This is a schematic diagram of some embodiments of the control method for the air conditioning unit disclosed herein.

[0068] Figure 2The diagram shows some other embodiments of the control method for the air conditioning unit disclosed herein.

[0069] Figure 3 This is a schematic diagram of some embodiments of the control method for the air conditioning unit disclosed herein.

[0070] Figure 4 This is a schematic diagram of some embodiments of the control method for the air conditioning unit disclosed herein.

[0071] Figure 5 This is a schematic diagram of the structure of some embodiments of the control device disclosed herein.

[0072] Figure 6 This is a schematic diagram of the structure of some other embodiments of the control device disclosed herein. Detailed Implementation

[0073] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0074] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure.

[0075] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0076] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0077] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0078] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0079] Figure 1 This is a schematic diagram of some embodiments of the control method for the air conditioning unit disclosed herein. Figure 1The embodiments can be executed by the air conditioning unit, indoor unit, or control device of this disclosure. For example... Figure 1 As shown, Figure 1 The method of the embodiment may include at least one of steps 1 to 3.

[0080] Step 1: Obtain the cabin temperature of all compartments.

[0081] In some embodiments of this disclosure, the compartment is a cargo tank for manufacturing liquefied natural gas (LNG) carriers. Therefore, this disclosure provides for temperature control of the compartment, ensuring the required indoor environment for manufacturing LNG carrier cargo tanks in any climatic environment.

[0082] In some embodiments of this disclosure, each of all compartments is used to manufacture the liquid cargo tanks of a liquefied natural gas carrier.

[0083] In some embodiments of this disclosure, step 1 may include: acquiring the cabin temperature of all compartments after a predetermined temperature detection time t1. The above embodiments of this disclosure can achieve periodic detection of cabin temperature.

[0084] In some embodiments of this disclosure, the predetermined temperature detection time t1 can be selected from a range of 60-200s.

[0085] In some embodiments of this disclosure, step 1 may include: detecting the temperatures T1, T2...T in each compartment after a predetermined temperature detection time t1. N .

[0086] In some embodiments of this disclosure, the number of compartments in the cargo tank of a liquefied natural gas carrier is N (N is a natural number greater than or equal to 3).

[0087] In some embodiments of this disclosure, N is a natural number greater than or equal to 2.

[0088] In some embodiments of this disclosure, For the temperature inside any cabin, Let n be the temperature in any other cabin, where n is a natural number greater than or equal to 1 and less than or equal to N, and n1 is a natural number greater than or equal to 1 and less than or equal to N.

[0089] Step 2, based on the cabin temperature of each compartment. The target temperature of the air conditioning unit used in the cabin is adjusted according to the relationship between the cabin temperature setpoint and the actual temperature.

[0090] In some embodiments of this disclosure, the air conditioning unit is an air conditioning unit used to regulate and control the cabin temperature.

[0091] The embodiments disclosed above can automatically adjust the target temperature of the unit to make full use of the unit's capacity, thereby meeting the indoor environment requirements for the manufacture of LNG carrier cargo tanks in any climate.

[0092] The embodiments disclosed above can meet the cabin environment requirements for the manufacture of LNG ship cargo tanks in any climate. Under normal construction conditions, the environmental control equipment must ensure that the air temperature / humidity inside the tank is within the range of 25°C and RH < 70%.

[0093] The temperature requirement for the cabin environment in the above embodiments of this disclosure for manufacturing LNG ship cargo tanks is 25°C.

[0094] In some embodiments of this disclosure, the cabin temperature setpoint may include an upper limit for cabin temperature. and cabin temperature limit At least one of them.

[0095] In some embodiments of this disclosure, the target temperature can be a controllable temperature such as a target supply air temperature or a target return air temperature.

[0096] In the above embodiments of this disclosure, the target temperature can be a target supply air temperature or a target return air temperature, thereby facilitating the detection of the current supply air temperature or the current return air temperature and making it convenient to compare the current supply air temperature or the current return air temperature with the target supply air temperature or the target return air temperature.

[0097] In some embodiments of this disclosure, when the air conditioning unit is in cooling mode, the target temperature can be the cooling target temperature.

[0098] In some embodiments of this disclosure, when the air conditioning unit is in heating mode, the target temperature can be the heating target temperature.

[0099] In the above embodiments of this disclosure, the target temperature can be a cooling target temperature or a heating target temperature, thereby the control method of this disclosure can be applied to the cooling or heating mode of an air conditioner.

[0100] In some embodiments of this disclosure, the target cooling temperature and target heating temperature After adjustment to the target temperature, each setting has upper and lower limits, i.e. , .

[0101] In some embodiments of this disclosure, The lower limit of the target cooling temperature. The upper limit of the target temperature for cooling. The lower limit of the target heating temperature. This is the upper limit of the target heating temperature.

[0102] In some embodiments of this disclosure, the target cooling temperature This is the set temperature in cooling mode, which is the target temperature for unit temperature control.

[0103] In some embodiments of this disclosure, step 2 may include at least one of steps 21 and 22.

[0104] Step 21: If the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature, the target temperature is reduced.

[0105] In the embodiments disclosed above, the target temperature can be automatically adjusted according to the required indoor environment, and different adjustment and control strategies are available for different situations.

[0106] Taking refrigeration as an example, if the cabin temperature is higher than the upper limit of the cabin temperature, the above-described embodiments of this disclosure can reduce the target temperature so that the unit can continue to refrigerate. Therefore, the unit adjusts the target set temperature on its own to reduce the cabin temperature.

[0107] In some embodiments of this disclosure, step 21 may include: reducing the target temperature if, within a predetermined continuous time t2, the temperature of at least one compartment is detected to be above the upper limit of the compartment temperature and the temperature of no compartment is detected to be below the lower limit of the compartment temperature.

[0108] The embodiments of this disclosure limit the detection to a predetermined continuous time t2 (e.g., 10s) before performing the corresponding operation, thereby improving the accuracy of detection and avoiding randomness and detection errors.

[0109] In order to distinguish the situation in step 23 where one compartment temperature is higher than the upper limit and the other compartment temperature is lower than the lower limit, the above embodiments of this disclosure further limit the situation in step 21 to the situation where one compartment temperature is higher than the upper limit and no compartment temperature is detected to be lower than the lower limit. This allows for more precise classification of different situations and targeted control for different situations.

[0110] In some embodiments of this disclosure, the predetermined continuous time t2 may be in the range of 10-30 s.

[0111] In some embodiments of this disclosure, t1 is used to periodically detect the temperature inside the chamber. For example, if t1 is 60 seconds and t2 is 10 seconds, then every 60 seconds it is determined whether the condition of continuous 10 seconds of overheating is met. That is, if the overheating condition is continuously detected within 50 seconds to 60 seconds in one cycle, the target cooling temperature is adjusted. .

[0112] Step 22: If the temperature of at least one compartment is detected to be below the lower limit of the compartment temperature, the target temperature is increased.

[0113] Taking refrigeration as an example, if the cabin temperature is lower than the lower limit of the cabin temperature, the above-described embodiments of this disclosure can raise the target temperature, so that the unit stops refrigeration or reduces the refrigeration load, and the cabin temperature is raised by the unit adjusting the target set temperature itself.

[0114] In some embodiments of this disclosure, step 22 may include: increasing the target temperature if, within a predetermined continuous time t2, the temperature of at least one compartment is detected to be below the lower limit of the compartment temperature and no compartment temperature is detected to be above the upper limit of the compartment temperature.

[0115] In order to distinguish the situation in step 23 where one compartment temperature is higher than the upper limit and the other compartment temperature is lower than the lower limit, the above embodiments of this disclosure further limit the situation in step 22 to the situation where one compartment temperature is lower than the lower limit and no compartment temperature is detected to be higher than the lower limit. This allows for more precise classification of different situations and targeted control for different situations.

[0116] In some embodiments of this disclosure, step 2 may further include at least one of steps 23 to 26.

[0117] Step 23: If, within a predetermined continuous time t2, at least one compartment is found to have a temperature higher than the upper limit of the compartment temperature and at least one compartment is found to have a temperature lower than the lower limit of the compartment temperature, then, based on the difference between the highest compartment temperature and the average compartment temperature of all compartments, determine the absolute value of the first difference. .

[0118] In some embodiments of this disclosure, the absolute value of the first difference The absolute value obtained by subtracting the maximum value of the cabin temperature (cabin interior temperature) from the average value of the cabin temperature in each compartment.

[0119] Step 24: Determine the absolute value of the second difference based on the difference between the lowest and average cabin temperatures across all cabins. .

[0120] In some embodiments of this disclosure, the absolute value of the second difference The absolute value obtained by subtracting the minimum cabin temperature from the average cabin temperature.

[0121] Step 25: Adjust the target temperature according to the relationship between the absolute values ​​of the first and second differences.

[0122] In the above embodiments of this disclosure, when the temperature of one compartment is higher than the upper limit and the temperature of another compartment is lower than the lower limit, the target temperature can be adjusted according to the magnitude of the absolute value of the difference between the two and the average value.

[0123] In some embodiments of this disclosure, step 25 may include at least one of steps 251 and 253.

[0124] Step 251, the absolute value of the first difference Less than the absolute value of the second difference In this case, the target temperature is lowered.

[0125] In the embodiments disclosed above, under normal control conditions, it is undesirable for one chamber temperature to be higher than the upper limit of the chamber temperature while another chamber temperature is lower than the lower limit of the chamber temperature. Therefore... The greater the distance from the average, the more likely it is to indicate The corresponding temperature sensor is faulty. The validity of the corresponding data is weaker, using data close to the average value. To be prioritized for control.

[0126] In some embodiments of this disclosure, steps 21 and 251, the step of reducing the target temperature, may include: reducing the target temperature by a target temperature adjustment value. .

[0127] Step 252, the absolute value of the first difference Greater than the absolute value of the second difference In this case, the target temperature is increased.

[0128] In the embodiments disclosed above, under normal control conditions, it is undesirable for one chamber temperature to be higher than the upper limit of the chamber temperature while another chamber temperature is lower than the lower limit of the chamber temperature. Therefore... The greater the distance from the average, the more likely it is to indicate The corresponding temperature sensor is faulty. The validity of the corresponding data is weaker, using data close to the average value. To be prioritized for control.

[0129] In some embodiments of this disclosure, steps 22 and 252, the step of increasing the target temperature, may include: increasing the target temperature by a target temperature adjustment value. .

[0130] The embodiments of this disclosure use a target temperature adjustment value each time to adjust the target temperature, which can ensure stable and accurate adjustment of the target temperature. The embodiments of this disclosure can achieve quantitative temperature adjustment.

[0131] Step 253: If the absolute value of the first difference is equal to the absolute value of the second difference, keep the target temperature unchanged.

[0132] Step 26: If no cabin temperature is detected to be lower than the lower limit of the cabin temperature and no cabin temperature is detected to be higher than the upper limit of the cabin temperature within a predetermined continuous time t2, the target temperature is kept constant.

[0133] Step 3: Control the outdoor unit of the air conditioning unit according to the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature.

[0134] The embodiments of this disclosure can automatically adjust the target temperature of the unit to fully utilize its capacity. For the first time, after the target temperature is automatically adjusted, these embodiments simultaneously consider the relationship between the target temperature before adjustment and the current monitored temperature, as well as the relationship between the current target temperature and the current monitored temperature, when controlling the outdoor unit. Therefore, through the linkage between the indoor and outdoor units, and by sending control commands from the indoor unit to the outdoor unit, these embodiments can more flexibly, effectively, and intelligently utilize the air conditioning unit's ability to regulate the cabin environment, and can more accurately control the unit temperature and the outdoor unit's operating mode.

[0135] In some embodiments of this disclosure, step 3 may include: determining the current operating state of the outdoor unit based on the relationship between the target temperature before adjustment and the current monitored temperature, wherein the current operating state may be a loading state, unloading state, or standby state under cooling conditions, or a loading state, unloading state, or standby state under heating conditions; determining the current operating conditions met by the outdoor unit based on the relationship between the current target temperature and the current monitored temperature, wherein the met operating conditions include outdoor unit loading conditions, outdoor unit unloading conditions, and outdoor unit standby conditions under cooling or heating conditions; and controlling the outdoor unit of the air conditioning unit based on the current operating state of the outdoor unit and the currently met operating conditions.

[0136] The embodiments of this disclosure can control the outdoor unit by making full use of the relationship between the target temperature before adjustment, the current target temperature, and the current monitored temperature. Specifically, control commands can be sent to the outdoor unit based on its current operating status and the currently met operating conditions to control the outdoor unit of the air conditioning unit. Thus, the embodiments of this disclosure can flexibly, effectively, and intelligently make full use of the air conditioning unit's ability to regulate the cabin environment through the linkage of the indoor and outdoor units.

[0137] In some embodiments of this disclosure, the current monitored temperature It can be the actual detected temperature value of the selected target temperature (supply air temperature, return air temperature, etc.).

[0138] In some embodiments of this disclosure, when the target temperature is the target supply air temperature, the current monitored temperature can be the current supply air temperature.

[0139] In some embodiments of this disclosure, when the target temperature is the target return air temperature, the current monitored temperature can be the current return air temperature.

[0140] In the embodiments of this disclosure, the outdoor unit can be controlled by comparing the target supply air temperature with the current supply air temperature, or by comparing the target return air temperature with the current return air temperature. This greatly expands the application scope of the embodiments of this disclosure.

[0141] In some embodiments of this disclosure, step 3 may include: when the target temperature is the target supply air temperature, sending corresponding control commands to the outdoor unit according to the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature.

[0142] In the above embodiments of this disclosure, when the target temperature is the target supply air temperature, after the target temperature is automatically adjusted, the influence of the relationship between the target temperature before adjustment, the current target temperature, and the current monitored temperature on the control of the external unit can be fully utilized. The above embodiments of this disclosure can achieve flexible, effective, and intelligent full utilization of the air conditioning unit's ability to regulate the cabin environment through the linkage of the indoor and outdoor units.

[0143] In some embodiments of this disclosure, in a cooling mode where the target temperature is lowered, or in a heating mode where the target temperature is increased, step 3 may include at least one of steps 31 and 32.

[0144] Step 31: If a standby command or load reduction command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the loading conditions of the outdoor unit are met based on the relationship between the current target supply air temperature and the current supply air temperature, a loading command is sent to the outdoor unit.

[0145] In the above embodiments of this disclosure, the control of the outdoor unit simultaneously considers the relationship between the target supply air temperature before adjustment and the current supply air temperature, as well as the relationship between the current target supply air temperature and the current supply air temperature, and their impact on the outdoor unit control. In cooling mode, when the target temperature is lowered, if it is determined that the command has switched from standby or load reduction to load command, the indoor unit sends a load command to the outdoor unit, and the outdoor unit starts to increase the cooling capacity, thereby ensuring that the temperature in all cabins is within the required range.

[0146] In the above embodiments of this disclosure, under the heating mode and when the target temperature is increased, if it is determined that the command is switched from standby or load reduction to loading, the outdoor unit will start to increase the heating capacity so that the temperature in all cabins can be within the required range.

[0147] In some embodiments of this disclosure, the standby command refers to the temperature point standby command.

[0148] In some embodiments of this disclosure, in cooling mode, based on the target supply air temperature and current supply air temperature The steps for determining the load increase / decrease and standby conditions based on the magnitude relationship may include: if the supply air temperature is detected during a predetermined continuous time t2. Target cooling temperature If +ΔT is detected, a loading command is sent to the outdoor unit, where ΔT is the predetermined temperature value; if the supply air temperature is detected within the predetermined continuous time t2... Target cooling temperature If -ΔT is detected, a load reduction command is sent to the outdoor unit; if a load reduction command is continuously sent to the outdoor unit for a predetermined temperature detection time t1, and the supply air temperature is still detected for a predetermined continuous time t2... Target cooling temperature If the temperature drops by -2ΔT, a standby command is sent to the outdoor unit. The load reduction and standby modes are determined based on the temperature difference between the detected temperature and the set target temperature. The load is reduced when the temperature difference is small and the standby mode is activated when the temperature difference is large.

[0149] In some embodiments of this disclosure, taking refrigeration as an example, the main basis for the unit's load increase / decrease and standby conditions is the set target temperature. and the selected detection temperature .

[0150] In some embodiments of this disclosure, in step 31, taking refrigeration as an example, if the temperature inside a certain compartment is too high, it indicates that the current cooling capacity is insufficient. However, the supply air temperature has already met the conditions for load reduction or standby compared with the target temperature. If the cooling capacity is to be increased further, the target temperature can only be reduced so that the unit can continue to cool. Therefore, the unit adjusts the target set temperature on its own to lower the temperature inside the compartment.

[0151] Step 32: If it is determined that the outdoor unit has been loaded and the outdoor unit is in a loading state based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature is used to determine that the loading conditions of the outdoor unit are met, the indoor unit continues to send loading commands to the outdoor unit, and the duration of the indoor unit sending loading commands to the outdoor unit is increased.

[0152] In the above embodiments of this disclosure, under the cooling mode and when the target temperature is lowered, if it is determined that both the adjustment and the time before and after the adjustment are loading commands, the time for the loading command issued by the indoor unit will also increase due to the increased deviation between the cooling target temperature and the air supply temperature, thereby continuously increasing the load on the outdoor unit to improve the cooling capacity.

[0153] In the above embodiments of this disclosure, under the heating mode and when the target temperature is increased, if it is determined that both the adjustment and the target temperature are loading commands, the loading command time issued by the indoor unit will also increase due to the increased deviation between the heating target temperature and the air supply temperature, thereby continuously increasing the load on the outdoor unit to improve the heating capacity.

[0154] In some embodiments of this disclosure, the step of increasing the duration of the loading command sent from the indoor unit to the outdoor unit may include: the indoor unit forwarding the loading command to the outdoor unit through display panel communication, and continuously sending the loading signal before the target temperature is reached because the difference between the detected temperature and the target temperature is increased.

[0155] In some embodiments of this disclosure, in a cooling mode where the target temperature is increased, or in a heating mode where the target temperature is decreased, step 3 may include at least one of steps 33 to 35.

[0156] Step 33: If it is determined that a load command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and if it is determined that the outdoor unit load reduction condition is met, a load reduction command is sent to the outdoor unit; if it is determined that the outdoor unit standby condition is met, a standby command is sent to the outdoor unit.

[0157] In the above embodiments of this disclosure, when the target temperature is increased in cooling mode, if it is determined that the system is switching from loading to unloading or standby, the outdoor unit performs corresponding actions to reduce the cooling capacity so that the temperature in all cabins can be within the required range.

[0158] In the above embodiments of this disclosure, under the heating mode and when the target temperature is reduced, if it is determined that the load is being switched to unload or standby, the outdoor unit performs corresponding actions to reduce the heating capacity, thereby ensuring that the temperature in all cabins is within the required range.

[0159] Step 34: If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a standby command has been sent to the outdoor unit and the outdoor unit is in standby mode, then, based on the relationship between the current target supply air temperature and the current supply air temperature, it is determined that the standby conditions for the outdoor unit are met, and a standby command is sent to the outdoor unit to control the outdoor unit to maintain the standby mode.

[0160] Step 35: If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a load reduction command has been sent to the outdoor unit and the outdoor unit is in a load reduction state, then, based on the relationship between the current target supply air temperature and the current supply air temperature, if it is determined that the outdoor unit load reduction condition is met, a load reduction command will continue to be sent to the outdoor unit; if it is determined that the outdoor unit standby condition is met, a standby command will be sent to the outdoor unit.

[0161] In the control of the external unit, the embodiments of this disclosure simultaneously consider the relationship between the target supply air temperature before adjustment and the current supply air temperature, as well as the relationship between the current target supply air temperature and the current supply air temperature, and their impact on the control of the external unit. In the cooling mode and when the target temperature is increased, if it is determined that standby should continue, or if the system switches from load reduction to load reduction or standby, the cooling capacity can be reduced or kept in standby mode until the cabin temperature meets the requirements.

[0162] In the above embodiments of this disclosure, under the heating mode and when the target temperature is reduced, if it is determined to continue to maintain standby, or to switch from load reduction to load reduction or standby, the heating capacity can be reduced by continuously decreasing the outdoor unit load or switching to standby, until the cabin temperature meets the requirements.

[0163] Figure 2 The diagram shows some other embodiments of the control method for the air conditioning unit disclosed herein. Figure 2 The embodiments can be executed by the air conditioning unit, indoor unit, or control device of this disclosure. For example... Figure 2 As shown, Figure 2 The methods in the embodiments may include, in addition to, Figure 1 In addition to at least one of steps 1 to 3 in the embodiment, step 4 may also be included.

[0164] Step 4: Control the opening degree of the fresh air valve according to the relationship between the current target temperature and the current monitored temperature.

[0165] The embodiments disclosed above can utilize outdoor fresh air to adjust the cabin environment in parallel according to actual conditions, so as to meet the cabin environment requirements for manufacturing LNG ship cargo tanks.

[0166] In some embodiments of this disclosure, step 4 may include: when the target temperature is the target supply air temperature, controlling the opening degree of the fresh air valve according to the relationship between the current target supply air temperature and the current supply air temperature.

[0167] The embodiments disclosed above can control the opening degree of the fresh air valve and adjust the cabin environment according to the relationship between the current target supply air temperature and the current supply air temperature, so as to meet the cabin environment required for manufacturing LNG ship cargo tanks.

[0168] In some embodiments of this disclosure, step 4 may include at least one of steps 41 to 42.

[0169] Step 41: In the case that the cooling mode is set, the target cooling temperature has been adjusted to the lower limit of the target cooling temperature, the outdoor unit capacity has reached its maximum, and the process continues for a predetermined duration t3, if at least one compartment temperature is detected to be lower than the lower limit of the target cooling temperature within a predetermined continuous time t2, and no compartment temperature is detected to be higher than the upper limit of the target cooling temperature, then the opening of the fresh air valve is reduced.

[0170] In the embodiments disclosed above, under normal operating conditions, cooling is provided in summer and heating in winter. Therefore, if the cooling requirement cannot be met, the fresh air valve is closed to reduce the inflow of heat carried by the external fresh air.

[0171] In some embodiments of this disclosure, the predetermined duration t3 ranges from 10 to 30 minutes.

[0172] In some embodiments of this disclosure, the step of reducing the opening degree of the fresh air valve may include: reducing the opening degree of the fresh air valve by a predetermined adjustment amount every predetermined valve adjustment time t4. .

[0173] In some embodiments of this disclosure, a predetermined opening adjustment amount This refers to the adjustment of the fresh air valve opening each time.

[0174] Step 42: In heating mode, if the outdoor unit has been shut down for a predetermined duration, and if at least one compartment temperature is detected to be higher than the upper limit of the compartment temperature within the predetermined continuous time, and no compartment temperature is detected to be lower than the lower limit of the compartment temperature, then increase the opening of the fresh air valve.

[0175] In the above embodiments of this disclosure, under special circumstances, if the unit's capacity has reached its maximum or minimum and still cannot meet the cabin temperature requirements, the cabin temperature can be adjusted by utilizing the external environment's ability to regulate the cabin environment, and the indoor temperature can be adjusted by utilizing the external fresh air volume to meet the requirements.

[0176] In some embodiments of this disclosure, the step of increasing the opening of the fresh air valve may include: increasing the opening of the fresh air valve by a predetermined adjustment amount every predetermined valve adjustment time.

[0177] The embodiments of this disclosure allow for a predetermined adjustment of the valve opening amount after a predetermined adjustment time. This makes the opening adjustment more accurate and stable. The embodiments of this disclosure enable quantitative adjustment of the opening.

[0178] Figure 3 This is a schematic diagram of some embodiments of the control method for the air conditioning unit disclosed herein. Figure 3 The embodiments may be executed by the air conditioning unit, indoor unit, or control device of this disclosure. Figure 3 This is a schematic diagram of some embodiments of the control method for the air conditioning unit in cooling mode of this disclosure. Figure 3 A flowchart of the environmental control process within the refrigerated compartment is provided, such as... Figure 3 As shown, Figure 3 The method of the embodiment may include at least one of steps 401 and 415.

[0179] This disclosure Figure 3 and Figure 4 In this embodiment, the air conditioning unit is described using a dual-system screw compressor for the outdoor unit and a dehumidifying heat pump for the indoor unit. Assume there are N compartments (N>=3), and the target temperature selected for the unit is the supply air temperature. The temperature of each compartment is measured every predetermined temperature detection time t1, T1, T2...T... N .

[0180] Step 401: Determine whether the cabin temperature of at least one compartment is detected within a predetermined continuous time t2. Above the upper limit of cabin temperature ( Furthermore, no cabin temperature was detected in any of the compartments. Below the lower limit of cabin temperature If yes, proceed to step 402; otherwise, proceed to step 406.

[0181] Step 402: Detect the temperature of at least one compartment within a predetermined continuous time t2. Above the upper limit of cabin temperature ( Furthermore, no cabin temperature was detected in any of the compartments. Below the lower limit of cabin temperature In this case, the target cooling temperature will be [temperature to be determined]. Lower the target temperature adjustment value ,Right now, .

[0182] Step 403: Determine the target cooling temperature. Is it less than or equal to? .like Less than or equal to If so, proceed to step 405; otherwise, if Greater than Then proceed to step 404.

[0183] Step 404, the indoor unit adjusts the air supply temperature according to the target temperature. and current supply air temperature Based on the size relationship, send corresponding control commands to the outdoor unit. Then, execute step 401.

[0184] In some embodiments of this disclosure, step 404 may include: sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature.

[0185] In some embodiments of this disclosure, step 404 may include Figure 2 At least one of steps 31 and 32 in the embodiment.

[0186] In some embodiments of this disclosure, step 404 may include: if the indoor unit determines the target cooling temperature before adjusting the target temperature... With air supply temperature The indoor unit has already sent a temperature-point standby or load reduction command to the outdoor unit. However, due to a change in the target temperature, the indoor unit determines and re-meets the outdoor unit's loading conditions, then sends a loading command to the outdoor unit. The outdoor unit starts, increasing its cooling capacity to ensure that the temperature in all cabins is within the required range. If the outdoor unit was still under load before the target temperature adjustment, the cooling target temperature... With air supply temperature As the deviation increases, the time for the indoor unit to issue loading commands will also increase, which in turn will cause the outdoor unit to continuously increase its load in order to improve its cooling capacity.

[0187] Step 405, in cooling mode, if the target cooling temperature is... It has been adjusted to the lower limit of the target cooling temperature. Furthermore, even though the outdoor unit's capacity has reached the maximum predetermined duration t3, it is still detecting the cabin temperature of any compartment during continuous time t2. Exceeding the cabin temperature limit ( Furthermore, no cabin temperature was detected in any of the compartments. Below the lower limit of cabin temperature Then, the opening degree of the fresh air valve will decrease every time the air valve adjustment time t4 elapses. Then, proceed to step 401.

[0188] Step 406: Determine whether the cabin temperature of at least one compartment is detected within a predetermined continuous time t2. Below the lower limit of cabin temperature Furthermore, no cabin temperature was detected in any of the compartments. Above the upper limit of cabin temperature If yes, proceed to step 407; otherwise, proceed to step 411.

[0189] Step 407: Detect the temperature of at least one compartment within a predetermined continuous time t2. Below the lower limit of cabin temperature Furthermore, no cabin temperature was detected in any of the compartments. Above the upper limit of cabin temperature In this case, the target cooling temperature will be [temperature to be determined]. Increase target temperature adjustment value ,Right now, .

[0190] Step 408: Determine the target cooling temperature. Is it greater than or equal to? .like Greater than or equal to If so, proceed to step 410; otherwise, if Less than Then proceed to step 409.

[0191] Step 409, the indoor unit adjusts according to the target air supply temperature. and current supply air temperature Based on the size relationship, send corresponding control commands to the outdoor unit. Then, execute step 401.

[0192] In some embodiments of this disclosure, step 409 may include: sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature.

[0193] In some embodiments of this disclosure, step 409 may include Figure 2 At least one of steps 33 to 35 in the embodiment.

[0194] In some embodiments of this disclosure, step 409 may include: if the indoor unit determines the target cooling temperature before adjusting the target temperature... and current supply air temperature The indoor unit continues to send loading commands to the outdoor unit. However, due to changes in the target temperature, the indoor unit determines that the outdoor unit's load reduction or temperature-point standby conditions are met and sends corresponding commands to the outdoor unit. The outdoor unit then executes the appropriate actions to reduce cooling capacity, thereby ensuring that the temperature in all cabins remains within the required range. Before the target temperature adjustment, if the outdoor unit is already in temperature-point standby mode, it remains in standby. If the outdoor unit is in load reduction mode, the cooling target temperature... and current supply air temperature As the deviation decreases, the indoor unit continues to issue load reduction commands or meets the standby conditions to put the outdoor unit into standby mode, thereby reducing the cooling capacity until the cabin temperature meets the requirements.

[0195] Step 410, let equal .

[0196] Step 411: Determine whether the cabin temperature of any compartment is detected within a predetermined continuous time t2. Above the upper limit of cabin temperature ( And the temperature of any other compartment was detected. Below the lower limit of cabin temperature If yes, proceed to step 413; otherwise, proceed to step 412.

[0197] Step 412: If no compartment temperature is detected to be lower than the lower limit of the compartment temperature and no compartment temperature is detected to be higher than the upper limit of the compartment temperature within a predetermined continuous time t2, the target temperature is kept constant. ,Right now, .

[0198] Step 413: Detect the temperature of any compartment within a predetermined continuous time t2. Above the upper limit of cabin temperature ( And the temperature of any other compartment was detected. Below the lower limit of cabin temperature In this case, the absolute value of the first difference is determined based on the difference between the highest cabin temperature and the average cabin temperature across all cabins. Among them, the absolute value of the first difference The absolute value of the difference between the maximum and average cabin temperatures (internal temperatures) of each compartment is used to determine the second absolute value of the difference. Among them, the absolute value of the second difference The absolute value of the difference between the minimum and average cabin temperatures in each compartment is used; if the absolute value of the first difference is less than the absolute value of the second difference, the target temperature is lowered. Then, step 403 is executed.

[0199] In some embodiments of this disclosure, step 413 may include: if a predetermined continuous time t2 is simultaneously detected that the temperature of any compartment exceeds the upper limit of the compartment temperature. Furthermore, the temperature in the other compartment is below the lower limit of the compartment temperature. The maximum value T among the detected chamber temperatures Max With minimum value T Min Compared with the average cabin temperature T P The absolute values ​​are obtained by subtracting them. , .like Then the target cooling temperature T C Reduce the target temperature adjustment value Ta, that is, .

[0200] Step 414, the absolute value of the first difference Greater than the absolute value of the second difference In this case, the target temperature is increased; then, step 408 is executed.

[0201] In some embodiments of this disclosure, step 414 may include: if Then the target cooling temperature Increase the target temperature adjustment value Ta, that is, .

[0202] Step 415, the absolute value of the first difference Equal to the absolute value of the second difference In this case, the target temperature is kept constant, that is, .

[0203] In some embodiments of this disclosure, step 415 may include: if Then the target cooling temperature constant.

[0204] By adjusting the control method of the above embodiments of this disclosure, the air conditioning unit and the ability to adjust the cabin environment by means of the external environment can be flexibly, effectively and intelligently utilized to achieve the purpose of meeting the cabin environment required for manufacturing LNG ship cargo tanks.

[0205] Figure 4 This is a schematic diagram of some embodiments of the control method for the air conditioning unit disclosed herein. Figure 4 The embodiments may be executed by the air conditioning unit, indoor unit, or control device of this disclosure. Figure 4 This is a schematic diagram of some embodiments of the control method for the air conditioning unit in heating mode of this disclosure. Figure 4 A flowchart of the environmental control process within the heating chamber is provided, such as... Figure 4 As shown, Figure 4 The method of the embodiment may include at least one of steps 501 and 515.

[0206] This disclosure Figure 3 and Figure 4 In this embodiment, the air conditioning unit is described using a dual-system screw compressor for the outdoor unit and a dehumidifying heat pump for the indoor unit. Assume there are N compartments (N>=3), and the target temperature selected for the unit is the supply air temperature. The temperature of each compartment is measured every predetermined temperature detection time t1, T1, T2...T... N .

[0207] Step 501: Determine whether the cabin temperature of at least one compartment is detected within a predetermined continuous time t2. Above the upper limit of cabin temperature ( Furthermore, no cabin temperature was detected in any of the compartments. Below the lower limit of cabin temperature If yes, proceed to step 502; otherwise, proceed to step 506.

[0208] Step 502: Detect the temperature of at least one compartment within a predetermined continuous time t2. Above the upper limit of cabin temperature ( Furthermore, no cabin temperature was detected in any of the compartments. Below the lower limit of cabin temperature In this case, the target heating temperature will be... Lower the target temperature adjustment value ,Right now, .

[0209] Step 503: Determine the target heating temperature. Is it less than or equal to? .like Less than or equal to If so, proceed to step 505; otherwise, if Greater than Then proceed to step 504.

[0210] Step 504, the indoor unit adjusts according to the target air supply temperature. and current supply air temperature Based on the size relationship, send corresponding control commands to the outdoor unit. Then, execute step 501.

[0211] In some embodiments of this disclosure, step 504 may include: sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature.

[0212] In some embodiments of this disclosure, step 504 may include Figure 2 At least one of steps 31 and 32 in the embodiment.

[0213] In some embodiments of this disclosure, step 504 may include: if the indoor unit determines the target heating temperature before adjusting the target temperature... With air supply temperature The internal unit continues to send loading commands to the external unit. However, due to changes in the target temperature, the internal unit determines that the external unit's load reduction or temperature-point standby conditions are met and issues corresponding commands to the external unit. The external unit then executes the appropriate actions to reduce heating output, thereby ensuring that the temperature in all cabins remains within the required range. If the external unit is already in temperature-point standby mode before the target temperature adjustment, it remains in standby mode. If the external unit is in load reduction mode, the heating target temperature... and current supply air temperature As the deviation decreases, the indoor unit continues to issue the original instructions (load reduction instructions or standby instructions to make the outdoor unit standby when the standby conditions are met), thereby continuously reducing the load on the outdoor unit or putting it into standby mode to reduce its heating capacity until the cabin temperature meets the requirements.

[0214] Step 505: In heating mode, if the outdoor unit has been shut down for the maximum predetermined duration t3, any compartment is still detected for a continuous time t2. The cabin temperature exceeds the cabin temperature limit. ( And no compartment was detected. The cabin temperature is below the lower limit of the cabin temperature. Then, the opening degree of the fresh air valve will decrease every time the air valve adjustment time t4 elapses. Next, proceed to step 501.

[0215] In some embodiments of this disclosure, the range of the fresh air valve control opening degree d is as follows: .

[0216] Step 506: Determine whether the cabin temperature of at least one compartment is detected within a predetermined continuous time t2. Below the lower limit of cabin temperature Furthermore, no cabin temperature was detected in any of the compartments. Above the upper limit of cabin temperature If yes, proceed to step 507; otherwise, proceed to step 511.

[0217] Step 507: Detect the temperature of at least one compartment within a predetermined continuous time t2. Below the lower limit of cabin temperature Furthermore, no cabin temperature was detected in any of the compartments. Above the upper limit of cabin temperature In this case, the target heating temperature will be... Increase target temperature adjustment value ,Right now, .

[0218] Step 508: Determine the target heating temperature. Is it greater than or equal to? .like Greater than or equal to If so, proceed to step 510; otherwise, if Less than Then proceed to step 509.

[0219] Step 509, the indoor unit adjusts the air supply temperature according to the target temperature. and current supply air temperature Based on the size relationship, send corresponding control commands to the outdoor unit. Then, execute step 501.

[0220] In some embodiments of this disclosure, step 509 may include: sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature.

[0221] In some embodiments of this disclosure, step 509 may include Figure 2 At least one of steps 33 to 35 in the embodiment.

[0222] In some embodiments of this disclosure, step 509 may include: if the indoor unit determines the target heating temperature before adjusting the target temperature... With air supply temperature The internal unit has already sent a temperature-point standby or load reduction command to the external unit. However, due to a change in the target temperature, the internal unit determines that the external unit's loading conditions are met again and sends a loading command to the external unit. The external unit then starts increasing its heating capacity to ensure that the temperature in all cabins is within the required range. If the external unit was still under load before the target temperature was adjusted, the heating target temperature... With air supply temperature As the deviation increases, the time for the indoor unit to issue the loading command will also increase, which in turn will cause the outdoor unit to continuously increase its load in order to improve its heating capacity.

[0223] Step 510, let equal .

[0224] Step 511: Determine whether the cabin temperature of any compartment is detected within a predetermined continuous time t2. Above the upper limit of cabin temperature ( And the temperature of any other compartment was detected. Below the lower limit of cabin temperature If yes, proceed to step 513; otherwise, proceed to step 512.

[0225] Step 512: If, within a predetermined continuous time t2, no compartment temperature is detected to be lower than the lower limit of the compartment temperature and no compartment temperature is detected to be higher than the upper limit of the compartment temperature, the target temperature is kept constant. ,Right now, .

[0226] Step 513: Detect the temperature of any one of the compartments within a predetermined continuous time t2. Above the upper limit of cabin temperature ( And the temperature of any other compartment was detected. Below the lower limit of cabin temperature In this case, the absolute value of the first difference is determined based on the difference between the highest cabin temperature and the average cabin temperature across all cabins. Among them, the absolute value of the first difference The absolute value of the difference between the maximum and average cabin temperatures (internal temperatures) of each compartment is used to determine the second absolute value of the difference. Among them, the absolute value of the second difference The absolute value of the difference between the minimum and average cabin temperatures in each compartment is used; if the absolute value of the first difference is less than the absolute value of the second difference, the target temperature is lowered. Then, step 503 is executed.

[0227] In some embodiments of this disclosure, step 513 may include: if a predetermined continuous time t2 is simultaneously detected that the temperature of any compartment exceeds the upper limit of the compartment temperature. Furthermore, the temperature in the other compartment is below the lower limit of the compartment temperature. The maximum value T among the detected chamber temperatures Max With minimum value T Min Compared with the average cabin temperature T P The absolute values ​​are obtained by subtracting them. , .like Then the target heating temperature Reduce the target temperature adjustment value Ta, that is, .

[0228] Step 514, the absolute value of the first difference Greater than the absolute value of the second difference In this case, the target temperature is increased; then, step 508 is executed.

[0229] In some embodiments of this disclosure, step 514 may include: if Then the target heating temperature Increase the target temperature adjustment value Ta, that is, .

[0230] Step 515, the absolute value of the first difference Equal to the absolute value of the second difference In this case, the target temperature is kept constant, that is, .

[0231] In some embodiments of this disclosure, step 515 may include: if Then the target heating temperature constant.

[0232] The embodiments of this disclosure automatically adjust the target cooling / heating temperature of the unit by comparing and judging the relationship between the temperature in each compartment and the set value. Through the linkage of indoor and outdoor units, the air conditioning unit's ability to regulate the compartment environment can be flexibly, effectively, and intelligently utilized. At the same time, the embodiments of this disclosure can utilize outdoor fresh air to regulate the compartment environment in parallel according to actual conditions, so as to meet the requirements of the compartment environment for manufacturing LNG carrier cargo tanks.

[0233] Figure 5 This is a schematic diagram of the structure of some embodiments of the control device disclosed herein. For example... Figure 5 As shown, the control device disclosed herein may include a cabin temperature acquisition module 51, a target temperature adjustment module 52, and an air conditioning unit control module 53.

[0234] The compartment temperature acquisition module 51 is configured to acquire the compartment temperature of all compartments, wherein the compartments are cargo tanks used in the manufacture of liquefied natural gas carriers.

[0235] In some embodiments of this disclosure, the cabin temperature setpoint includes at least one of a cabin temperature upper limit and a cabin temperature lower limit.

[0236] In some embodiments of this disclosure, the cabin temperature acquisition module 51, when acquiring the cabin temperature of all cabins, can be configured to acquire the cabin temperature of all cabins after a predetermined temperature detection time.

[0237] The target temperature adjustment module 52 is configured to adjust the target temperature of the air conditioning unit used in the compartment based on the relationship between the compartment temperature of each compartment and the compartment temperature set value.

[0238] In some embodiments of this disclosure, the target temperature may be a target supply air temperature or a target return air temperature.

[0239] In some embodiments of this disclosure, when the air conditioning unit is in cooling mode, the target temperature can be the cooling target temperature.

[0240] In some embodiments of this disclosure, when the air conditioning unit is in heating mode, the target temperature can be the heating target temperature.

[0241] In some embodiments of this disclosure, the target temperature adjustment module 52 may be configured to decrease the target temperature when the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature, and to increase the target temperature when the temperature of at least one compartment is detected to be lower than the lower limit of the compartment temperature.

[0242] In some embodiments of this disclosure, the target temperature adjustment module 52 may be configured to reduce the target temperature when, within a predetermined continuous time period, it is detected that the temperature of at least one compartment is higher than the upper limit of the compartment temperature and no compartment temperature is detected to be lower than the lower limit of the compartment temperature.

[0243] In some embodiments of this disclosure, the target temperature adjustment module 52 may be configured to increase the target temperature when, within a predetermined continuous time period, it is detected that the temperature of at least one compartment is below the lower limit of the compartment temperature and no compartment temperature is detected above the upper limit of the compartment temperature.

[0244] In some embodiments of this disclosure, the target temperature adjustment module 52 may also be configured to, when detecting that the temperature of at least one compartment is higher than the upper limit of the compartment temperature and the temperature of at least one compartment is lower than the lower limit of the compartment temperature within a predetermined continuous time period, determine a first absolute value of the difference between the highest compartment temperature and the average compartment temperature of all compartments; determine a second absolute value of the difference between the lowest compartment temperature and the average compartment temperature of all compartments; and adjust the target temperature according to the relationship between the magnitude of the first absolute value of the difference and the second absolute value of the difference.

[0245] In some embodiments of this disclosure, when the target temperature adjustment module 52 adjusts the target temperature based on the relationship between the absolute values ​​of the first and second differences, it can be configured to perform at least one of the following operations: when the absolute value of the first difference is less than the absolute value of the second difference, decrease the target temperature; when the absolute value of the first difference is greater than the absolute value of the second difference, increase the target temperature.

[0246] In some embodiments of this disclosure, the target temperature adjustment module 52 may be configured to reduce the target temperature by a target temperature adjustment value when the target temperature is reduced.

[0247] In some embodiments of this disclosure, the target temperature adjustment module 52 may be configured to increase the target temperature by a target temperature adjustment value when the target temperature is increased.

[0248] The air conditioning unit control module 53 is configured to control the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature.

[0249] In some embodiments of this disclosure, when the target temperature is the target supply air temperature, the current monitored temperature can be the current supply air temperature.

[0250] In some embodiments of this disclosure, when the target temperature is the target return air temperature, the current monitored temperature can be the current return air temperature.

[0251] In some embodiments of this disclosure, the air conditioning unit control module 53 can be configured to determine the current operating state of the outdoor unit based on the relationship between the target temperature before adjustment and the current monitored temperature; determine the current operating conditions met by the outdoor unit based on the relationship between the current target temperature and the current monitored temperature; and control the outdoor unit of the air conditioning unit based on the current operating state and the currently met operating conditions.

[0252] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to send corresponding control commands to the outdoor unit based on the relationship between the target air supply temperature before adjustment and the current air supply temperature, and the relationship between the current target air supply temperature and the current air supply temperature, when the target temperature is the target supply air temperature.

[0253] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to, in cooling mode when the target temperature is lowered, or in heating mode when the target temperature is increased, and after determining that a standby command or load reduction command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, determine that the outdoor unit loading conditions are met based on the relationship between the current target supply air temperature and the current supply air temperature, and issue a loading command to the outdoor unit.

[0254] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to, in cooling mode when the target temperature is lowered, or in heating mode when the target temperature is raised, if it is determined that a loading command has been sent to the outdoor unit and the outdoor unit is in a loading state based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, determine that the outdoor unit loading conditions are met based on the relationship between the current target supply air temperature and the current supply air temperature, and continue to send loading commands to the outdoor unit, thereby increasing the duration of sending loading commands to the outdoor unit.

[0255] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to, in cooling mode and when the target temperature is increased, or in heating mode and when the target temperature is decreased, if it is determined that a load command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, if it is determined that the outdoor unit load reduction condition is met, then a load reduction command is sent to the outdoor unit; if it is determined that the outdoor unit standby condition is met, then a standby command is sent to the outdoor unit.

[0256] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to, in cooling mode and when the target temperature is increased, or in heating mode and when the target temperature is decreased, if it is determined that a standby command has been sent to the outdoor unit and the outdoor unit is in standby mode based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, determine that the standby conditions of the outdoor unit are met, and send a standby command to the outdoor unit to control the outdoor unit to maintain the standby state.

[0257] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to, in cooling mode and when the target temperature is increased, or in heating mode and when the target temperature is decreased, if it is determined that a load reduction command has been sent to the outdoor unit and the outdoor unit is in a load reduction state based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, if it is determined that the outdoor unit load reduction condition is met, then continue to send a load reduction command to the outdoor unit; if it is determined that the outdoor unit standby condition is met, then send a standby command to the outdoor unit.

[0258] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to control the opening degree of the fresh air valve based on the relationship between the current target temperature and the current monitored temperature.

[0259] In some embodiments of this disclosure, the air conditioning unit control module 53 may also be configured to control the opening degree of the fresh air valve according to the relationship between the current target air temperature and the current air temperature when the target temperature is the target supply air temperature.

[0260] In some embodiments of this disclosure, the control device of this disclosure, when controlling the opening of the fresh air valve based on the relationship between the current target supply air temperature and the current supply air temperature, can be configured to perform at least one of the following operations: in cooling mode, when the cooling target temperature has been adjusted to the lower limit of the cooling target temperature, and the outdoor unit capacity has reached its maximum for a predetermined duration, if at least one compartment temperature is detected to be lower than the lower limit of the compartment temperature within a predetermined continuous time, and no compartment temperature is detected to be higher than the upper limit of the compartment temperature, then the opening of the fresh air valve is reduced; in heating mode, when the outdoor unit has been shut down for a predetermined duration, if at least one compartment temperature is detected to be higher than the upper limit of the compartment temperature within a predetermined continuous time, and no compartment temperature is detected to be lower than the lower limit of the compartment temperature, then the opening of the fresh air valve is increased.

[0261] In some embodiments of this disclosure, the control device of this disclosure can be configured to reduce the opening of the fresh air valve by a predetermined opening adjustment amount every predetermined valve adjustment time.

[0262] In some embodiments of this disclosure, when the opening of the fresh air valve is increased, the control device of this disclosure can be configured to increase the opening of the fresh air valve by a predetermined adjustment amount every predetermined valve adjustment time.

[0263] The embodiments described above should meet the indoor environment requirements for manufacturing LNG ship cargo tanks in any climatic environment.

[0264] The embodiments disclosed above can automatically adjust the target temperature of the unit to fully utilize the unit's capacity.

[0265] The embodiments of this disclosure automatically adjust the target cooling / heating temperature of the unit by judging the temperature inside the cabin. Through the linkage of indoor and outdoor units, the air conditioning unit's own adjustment capabilities can be flexibly, effectively, and intelligently utilized. Simultaneously, the embodiments of this disclosure utilize fresh air in parallel to regulate the cabin environment according to actual conditions, in order to meet the cabin environment requirements for manufacturing LNG carrier cargo tanks.

[0266] Figure 6 This is a schematic diagram of the structure of some other embodiments of the control device disclosed herein. For example... Figure 6 As shown, the control device of this disclosure may include a memory 61 and a processor 62.

[0267] The memory 61 is used to store instructions, and the processor 62 is coupled to the memory 61. The processor 62 is configured to execute the control method of the air conditioning unit involved in the above embodiments based on the instructions stored in the memory.

[0268] like Figure 6 As shown, the control device also includes a communication interface 63 for exchanging information with other devices. Additionally, the control device includes a bus 64, through which the processor 62, communication interface 63, and memory 61 communicate with each other.

[0269] Memory 61 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk drive. Memory 61 may also be a memory array. Memory 61 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.

[0270] Furthermore, processor 62 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present disclosure.

[0271] In the embodiments disclosed above, the target temperature can be automatically adjusted according to the required indoor environment, and different adjustment and control strategies are available for different situations.

[0272] In the above embodiments of this disclosure, under special circumstances, if the unit capacity has reached its maximum or minimum and still cannot meet the cabin ambient temperature, the indoor temperature can be adjusted by using the outside fresh air volume to meet the requirements.

[0273] The above embodiments of this disclosure propose a control method and device for an air conditioning unit for LNG ship cargo tanks. By automatically adjusting the target temperature of the unit and linking the indoor and outdoor units, the unit's own adjustment capability can be fully utilized, and under specific conditions, it can be adjusted in parallel with the help of external fresh air. This allows for intelligent, flexible, and effective control of the indoor environment to meet requirements.

[0274] According to another aspect of this disclosure, an indoor unit is provided, including a control device as described in any of the above embodiments.

[0275] According to another aspect of this disclosure, an air conditioning unit is provided, including an outdoor unit and an indoor unit as described in any of the above embodiments.

[0276] According to another aspect of this disclosure, a computer program product is provided, comprising a computer program, wherein the computer program, when executed by a processor, implements the control method as described in any of the above embodiments.

[0277] According to another aspect of this disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions that, when executed by a processor, implement the control method as described in any of the above embodiments.

[0278] The computer-readable storage medium disclosed herein can be implemented as a non-transitory computer-readable storage medium.

[0279] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0280] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0281] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0282] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0283] The control device, cabin temperature acquisition module, and target temperature adjustment module described above can be implemented as a general-purpose processor, programmable logic controller, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof for performing the functions described in this disclosure.

[0284] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments of this disclosure can be implemented in hardware. The hardware can be implemented as a general-purpose processor, programmable logic controller, digital signal processor, application-specific integrated circuit, field-programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any suitable combination thereof for executing the methods of this disclosure.

[0285] This concludes the detailed description of the present disclosure. To avoid obscuring the concept of the disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0286] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware, or by a program instructing the relevant hardware to implement them. The program can be stored in a non-transitory computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0287] The description in this disclosure is provided for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the disclosure to its forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of this disclosure and to enable those skilled in the art to understand this disclosure and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A control method for an air conditioning unit, comprising: Obtain the cabin temperature of all compartments; Based on the relationship between the cabin temperature of each compartment and the cabin temperature setpoint, the target temperature of the air conditioning unit used in the compartment is adjusted, wherein the cabin temperature setpoint includes at least one of the upper limit of cabin temperature and the lower limit of cabin temperature. Based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature, the outdoor unit of the air conditioning unit is controlled; The step of adjusting the target temperature of the air conditioning unit for each cabin based on the relationship between the cabin temperature and the cabin temperature setpoint includes at least one of the following steps: If the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature, the target temperature is reduced. The reduction of the target temperature when the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature includes: reducing the target temperature when the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature within a predetermined continuous time period and when the temperature of any compartment is not detected to be lower than the lower limit of the compartment temperature. If the temperature of at least one compartment is detected to be below the lower limit of ...

2. The control method for an air conditioning unit according to claim 1, wherein, The control of the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature, includes: Based on the relationship between the target temperature before adjustment and the current monitored temperature, the current operating status of the outdoor unit is determined; Based on the relationship between the current target temperature and the current monitored temperature, the current operating conditions that the outdoor unit currently meets are determined; The outdoor unit of the air conditioning unit is controlled according to its current operating status and the currently met operating conditions.

3. A control method for an air conditioning unit, comprising: Obtain the cabin temperature of all compartments; Based on the relationship between the cabin temperature of each compartment and the cabin temperature setpoint, the target temperature of the air conditioning unit used in the compartment is adjusted, wherein the cabin temperature setpoint includes at least one of the upper limit of cabin temperature and the lower limit of cabin temperature. Based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature, the outdoor unit of the air conditioning unit is controlled; The step of adjusting the target temperature of the air conditioning unit for each cabin based on the relationship between the cabin temperature and the cabin temperature setpoint includes at least one of the following steps: If the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature, the target temperature shall be reduced. If the temperature of at least one compartment is detected to be below the lower limit of the compartment temperature, the target temperature shall be increased. The step of adjusting the target temperature of the air conditioning unit for each cabin based on the relationship between the cabin temperature and the cabin temperature setpoint further includes: If, within a predetermined continuous time period, the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature and the temperature of at least one compartment is detected to be lower than the lower limit of the compartment temperature, the absolute value of the first difference is determined based on the difference between the highest compartment temperature and the average compartment temperature of all compartments. The absolute value of the second difference is determined based on the difference between the lowest and average cabin temperatures of all cabins. The target temperature is adjusted based on the relationship between the absolute values ​​of the first and second differences.

4. The control method for an air conditioning unit according to claim 3, wherein, Adjusting the target temperature based on the relationship between the absolute values ​​of the first and second differences includes at least one of the following steps: If the absolute value of the first difference is less than the absolute value of the second difference, the target temperature is reduced. If the absolute value of the first difference is greater than the absolute value of the second difference, the target temperature is increased.

5. The control method for an air conditioning unit according to any one of claims 1 to 4, wherein: The step of reducing the target temperature includes: reducing the target temperature by a target temperature adjustment value; Increasing the target temperature includes increasing the target temperature by a target temperature adjustment value.

6. The control method for an air conditioning unit according to any one of claims 1 to 4, wherein: The target temperature is either the target supply air temperature or the target return air temperature. If the target temperature is the target supply air temperature, then the current monitored temperature is the current supply air temperature; If the target temperature is the target return air temperature, then the current monitored temperature is the current return air temperature. When the air conditioning unit is in cooling mode, the target temperature is the cooling target temperature; When the air conditioning unit is in heating mode, the target temperature is the heating target temperature.

7. The control method for an air conditioning unit according to any one of claims 1 to 4, wherein, The control of the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature, includes: When the target temperature is the target supply air temperature, corresponding control commands are sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature.

8. The control method for an air conditioning unit according to claim 7, wherein, In cooling mode, when the target temperature is lowered, or in heating mode, when the target temperature is raised, sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature, includes at least one of the following steps: If a standby command or load reduction command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the loading conditions for the outdoor unit are met based on the relationship between the current target supply air temperature and the current supply air temperature, a loading command is sent to the outdoor unit. If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a loading command has been sent to the outdoor unit and the outdoor unit is in a loading state, then, based on the relationship between the current target supply air temperature and the current supply air temperature, it is determined that the loading conditions for the outdoor unit are met, and a loading command is sent to the outdoor unit, increasing the duration of the loading command being sent to the outdoor unit.

9. The control method for an air conditioning unit according to claim 7, wherein, In cooling mode, when the target temperature is increased, or in heating mode, when the target temperature is decreased, sending corresponding control commands to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and the relationship between the current target supply air temperature and the current supply air temperature, includes at least one of the following steps: If a load command has been sent to the outdoor unit based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, and if the outdoor unit is deemed to meet the load reduction conditions based on the relationship between the current target supply air temperature and the current supply air temperature, a load reduction command is sent to the outdoor unit; if the outdoor unit is deemed to meet the standby conditions, a standby command is sent to the outdoor unit. If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a standby command has been sent to the outdoor unit and the outdoor unit is in standby mode, then, based on the relationship between the current target supply air temperature and the current supply air temperature, it is determined that the standby conditions for the outdoor unit are met, and a standby command is sent to the outdoor unit to control the outdoor unit to maintain the standby mode. If, based on the relationship between the target supply air temperature before adjustment and the current supply air temperature, it is determined that a load reduction command has been sent to the outdoor unit and the outdoor unit is in a load reduction state, then, based on the relationship between the current target supply air temperature and the current supply air temperature, if it is determined that the outdoor unit load reduction condition is met, a load reduction command will continue to be sent to the outdoor unit; if it is determined that the outdoor unit standby condition is met, a standby command will be sent to the outdoor unit.

10. A control method for an air conditioning unit, comprising: Obtain the cabin temperature of all compartments; The target temperature of the air conditioning unit used in the cabin is adjusted according to the relationship between the cabin temperature and the cabin temperature set value of each cabin. Based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature, the outdoor unit of the air conditioning unit is controlled; The opening degree of the fresh air valve is controlled according to the relationship between the current target temperature and the current monitored temperature. The step of controlling the opening degree of the fresh air valve based on the relationship between the current target temperature and the current monitored temperature includes: When the target temperature is the target supply air temperature, the opening degree of the fresh air valve is controlled according to the relationship between the current target supply air temperature and the current supply air temperature. The step of controlling the opening degree of the fresh air valve based on the relationship between the current target supply air temperature and the current supply air temperature includes at least one of the following steps: In the case of cooling mode, the target cooling temperature has been adjusted to the lower limit of the target cooling temperature, the outdoor unit capacity has reached its maximum and continues for a predetermined duration, if at least one compartment temperature is detected to be lower than the lower limit of the compartment temperature within a predetermined continuous period of time, and no compartment temperature is detected to be higher than the upper limit of the compartment temperature, then the opening of the fresh air valve will be reduced. In heating mode, if the outdoor unit has been shut down for a predetermined duration, and if at least one compartment temperature is detected to be higher than the upper limit of the compartment temperature within the predetermined continuous time, and no compartment temperature is detected to be lower than the lower limit of the compartment temperature, then the opening of the fresh air valve will be increased.

11. The control method for an air conditioning unit according to claim 10, wherein: The reduction of the opening of the fresh air valve includes: reducing the opening of the fresh air valve by a predetermined adjustment amount every predetermined valve adjustment time. The method of increasing the opening of the fresh air valve includes: increasing the opening of the fresh air valve by a predetermined adjustment amount every predetermined valve adjustment time.

12. The control method for an air conditioning unit according to any one of claims 1 to 4, 10 to 11, wherein, The process of obtaining the cabin temperature of all compartments includes: The cabin temperature of all compartments is obtained after a predetermined temperature detection time.

13. The control method for an air conditioning unit according to any one of claims 1 to 4, 10 to 11, wherein, The compartment is a cargo tank used in the manufacture of liquefied natural gas (LNG) carriers.

14. A control device, comprising: The cabin temperature acquisition module is configured to acquire the cabin temperature of all cabins; The target temperature adjustment module is configured to adjust the target temperature of the air conditioning unit for the compartment based on the relationship between the compartment temperature of each compartment and the compartment temperature setpoint, wherein the compartment temperature setpoint includes at least one of the upper limit of the compartment temperature and the lower limit of the compartment temperature. The air conditioning unit control module is configured to control the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature. The target temperature adjustment module is configured to perform at least one of the following operations: if the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature, the target temperature is reduced; if the temperature of at least one compartment is detected to be lower than the lower limit of the compartment temperature, the target temperature is increased. The target temperature adjustment module is configured to reduce the target temperature when, within a predetermined continuous time period, it detects that the temperature of at least one compartment is higher than the upper limit of the compartment temperature and no compartment temperature is lower than the lower limit of the compartment temperature. The target temperature adjustment module is configured to increase the target temperature when, within a predetermined continuous time period, it is detected that the temperature of at least one compartment is lower than the lower limit of the compartment temperature and no compartment temperature is detected to be higher than the upper limit of the compartment temperature.

15. A control device, comprising: The cabin temperature acquisition module is configured to acquire the cabin temperature of all cabins; The target temperature adjustment module is configured to adjust the target temperature of the air conditioning unit for the compartment based on the relationship between the compartment temperature of each compartment and the compartment temperature setpoint, wherein the compartment temperature setpoint includes at least one of the upper limit of the compartment temperature and the lower limit of the compartment temperature. The air conditioning unit control module is configured to control the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature. The target temperature adjustment module is configured to perform at least one of the following operations: if the temperature of at least one compartment is detected to be higher than the upper limit of the compartment temperature, the target temperature is reduced; if the temperature of at least one compartment is detected to be lower than the lower limit of the compartment temperature, the target temperature is increased. The target temperature adjustment module is further configured to, when detecting that at least one compartment temperature is higher than the upper limit of the compartment temperature and at least one compartment temperature is lower than the lower limit of the compartment temperature within a predetermined continuous time period, determine a first absolute value of the difference between the highest compartment temperature and the average compartment temperature of all compartments; determine a second absolute value of the difference between the lowest compartment temperature and the average compartment temperature of all compartments; and adjust the target temperature according to the relationship between the magnitudes of the first and second absolute values ​​of the difference.

16. A control device, comprising: The cabin temperature acquisition module is configured to acquire the cabin temperature of all cabins; The target temperature adjustment module is configured to adjust the target temperature of the air conditioning unit used in the compartment based on the relationship between the compartment temperature of each compartment and the compartment temperature setpoint. The air conditioning unit control module is configured to control the outdoor unit of the air conditioning unit based on the relationship between the target temperature before adjustment and the current monitored temperature, and the relationship between the current target temperature and the current monitored temperature. The air conditioning unit control module is also configured to control the opening degree of the fresh air valve based on the relationship between the current target temperature and the current monitored temperature. The air conditioning unit control module is also configured to control the opening degree of the fresh air valve according to the relationship between the current target air temperature and the current air temperature when the target temperature is the target supply air temperature. The control device, when controlling the opening of the fresh air valve based on the relationship between the current target supply air temperature and the current supply air temperature, is configured to perform at least one of the following operations: In cooling mode, when the target cooling temperature has been adjusted to the lower limit of the target cooling temperature, the outdoor unit capacity has reached its maximum and has been maintained for a predetermined duration, if at least one compartment temperature is detected to be lower than the lower limit of the compartment temperature within a predetermined continuous period, and no compartment temperature is detected to be higher than the upper limit of the compartment temperature, then the opening of the fresh air valve is reduced; In heating mode, when the outdoor unit has been shut down for a predetermined duration, if at least one compartment temperature is detected to be higher than the upper limit of the compartment temperature within a predetermined continuous period, and no compartment temperature is detected to be lower than the lower limit of the compartment temperature, then the opening of the fresh air valve is increased.

17. A control device, comprising: The memory is configured to store instructions; and The processor is configured to execute the instructions such that the control device implements the control method as described in any one of claims 1-13.

18. An indoor unit, comprising the control device as claimed in any one of claims 14 to 17.

19. An air conditioning unit, comprising an outdoor unit and an indoor unit as described in claim 18.

20. A computer-readable storage medium, wherein, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the control method as described in any one of claims 1-13.

21. A computer program product comprising a computer program, wherein, When the computer program is executed by the processor, it implements the control method as described in any one of claims 1-13.

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