Control method of air conditioner, air conditioner and computer readable storage medium

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a computer readable storage medium, and the method comprises the following steps: when the temperature value of a cold storage water tank is greater than or equal to a preset threshold value, determining a temperature difference between the temperature value and the coil temperature corresponding to a first heat exchanger; determining a running frequency according to the temperature difference; and controlling the compressor to run according to the running frequency, wherein the temperature difference is negatively correlated with the running frequency. The control method of the air conditioner determines the temperature difference between the temperature value and the coil temperature corresponding to the first heat exchanger to determine the current heat exchange capacity, and the smaller the temperature difference is, the stronger the current heat exchange capacity is. Based on the negative correlation between the temperature difference and the running frequency, when the temperature difference is smaller, a larger running frequency is adopted to run to accelerate the ice storage speed.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more particularly to an air conditioner control method, an air conditioner, and a computer-readable storage medium. Background Technology

[0002] In the early stage of cold storage, if the outdoor unit's water tank temperature is too high, the exhaust temperature will also be too high. At this time, the unit will shut down or reduce the flow of the throttling device to protect the compressor. However, this will prolong the ice storage time.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a storage medium, which aims to solve the problem that when the water tank temperature is too high, the system will shut down or the throttling device will reduce the flow to protect the compressor, resulting in a longer ice storage time.

[0005] To achieve the above objectives, the present invention provides a control method for an air conditioner, applied to a cold storage air conditioner. The cold storage air conditioner includes an energy storage circuit, which includes a compressor, a first heat exchanger, and a second heat exchanger. The second heat exchanger is disposed in a cold storage tank and is used to store energy in the cold storage tank. The control method for the air conditioner includes:

[0006] When the temperature value of the cold water storage tank is greater than or equal to a preset threshold, the temperature difference between the coil temperature of the first heat exchanger and the temperature value is determined.

[0007] The operating frequency is determined based on the temperature difference.

[0008] The compressor is controlled to operate according to the operating frequency, and the temperature difference is negatively correlated with the operating frequency.

[0009] Optionally, the step of determining the operating frequency based on the temperature difference includes:

[0010] Obtain the preset temperature difference range in which the temperature difference lies;

[0011] The frequency coefficient of the operating frequency is determined based on the preset temperature difference range;

[0012] The operating frequency is determined based on the temperature value and the frequency coefficient.

[0013] Optionally, the step of determining the operating frequency based on the temperature difference includes:

[0014] When the temperature difference is less than or equal to the first preset temperature difference, the operating frequency is determined based on the frequency enhancement parameter and the current frequency;

[0015] When the temperature difference is greater than the first preset temperature difference and the temperature difference is less than the second preset temperature difference, the operating frequency is determined based on the current frequency and the constant frequency parameter.

[0016] When the temperature difference is greater than or equal to the second preset temperature difference, the operating frequency is determined based on the frequency reduction parameter and the current frequency, wherein the first preset temperature difference is less than the second preset temperature difference. Optionally, the control method for the air conditioner further includes:

[0017] When the temperature value in the cold water tank is less than the preset threshold, the operating frequency of the compressor is determined according to the temperature value, and the compressor is controlled to operate according to the operating frequency. The lower the temperature value, the lower the operating frequency of the compressor.

[0018] Optionally, the control method for the air conditioner also includes:

[0019] After receiving the cold storage command and the air conditioner compressor running at the initial operating frequency, the first temperature value of the cold storage water tank and the first coil temperature corresponding to the first heat exchanger are obtained.

[0020] When the first temperature value and the first coil temperature meet the preset conditions, the operating frequency of the compressor is reduced, and the compressor is controlled to run at the reduced operating frequency to obtain the second temperature value of the cold water tank and the second coil temperature corresponding to the first heat exchanger.

[0021] When the second temperature value and the second coil temperature do not meet the preset conditions, the current temperature value of the cold water storage tank is obtained, and the step of determining the temperature difference between the coil temperature corresponding to the first heat exchanger and the temperature value is executed when the temperature value of the cold water storage tank is greater than or equal to the preset threshold.

[0022] Optionally, when the second temperature value and the second coil temperature do not meet the preset conditions, the step of obtaining the current temperature value of the cold water storage tank and determining the temperature difference between the coil temperature corresponding to the first heat exchanger and the temperature value when the temperature value of the cold water storage tank is greater than or equal to a preset threshold includes:

[0023] When the second temperature value and the second coil temperature do not meet the preset conditions, the compressor is controlled to run at the initial frequency for a preset time, the current temperature value of the cold water tank is obtained, and the step of determining the temperature difference between the coil temperature of the first heat exchanger and the temperature value is performed when the temperature value of the cold water tank is greater than or equal to a preset threshold.

[0024] Optionally, after obtaining the second temperature value of the cold water storage tank and the second coil temperature corresponding to the first heat exchanger, the method further includes:

[0025] When the second temperature value and the second coil temperature meet the preset conditions, the compressor is controlled to perform a shutdown operation.

[0026] Optionally, the preset conditions include any one of the following:

[0027] The temperature value is greater than the first preset temperature and the coil temperature is greater than the second preset temperature;

[0028] The temperature value is greater than the first preset temperature and the coil temperature is less than or equal to the second preset temperature;

[0029] The temperature value is less than or equal to the first preset temperature and the coil temperature is greater than the second preset temperature, wherein the preset threshold is less than the first preset temperature, the temperature value is the first temperature value or the second temperature value, and the coil temperature is the first coil temperature or the second coil temperature.

[0030] In addition, to achieve the above objectives, the present invention also provides an air conditioner, the air conditioner comprising: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor, wherein when the control program for the air conditioner is executed by the processor, it implements the various steps of the control method for the air conditioner as described above.

[0031] In addition, to achieve the above objectives, the present invention also provides a storage medium storing a control program for an air conditioner, wherein the control program for the air conditioner, when executed by the processor, implements the various steps of the control method for the air conditioner as described above.

[0032] The present invention proposes an air conditioner control method, an air conditioner, and a computer-readable storage medium. When the temperature value of the cold water tank is greater than or equal to a preset threshold, the temperature difference between the temperature value and the coil temperature corresponding to the first heat exchanger is determined to determine the current heat exchange capacity. The smaller the temperature difference, the stronger the current heat exchange capacity. Based on the negative correlation between temperature difference and operating frequency, when the temperature difference is smaller, a larger operating frequency is used to accelerate the ice storage speed. When the temperature difference is larger, it indicates that the current heat exchange capacity is worse and there is more liquid refrigerant in the pipe, which can easily damage the compressor. Therefore, a smaller operating frequency is used to protect the compressor. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the terminal structure of the hardware operating environment involved in various embodiments of the air conditioner control method of the present invention;

[0034] Figure 2 A schematic diagram of the structural components of a cold storage air conditioner;

[0035] Figure 3 This is a system schematic diagram of a cold storage air conditioner;

[0036] Figure 4 This is a flowchart illustrating the first embodiment of the control method for an air conditioner according to the present invention;

[0037] Figure 5 This is a flowchart illustrating a second embodiment of the control method for an air conditioner according to the present invention;

[0038] Figure 6 This is a flowchart illustrating the third embodiment of the control method for an air conditioner according to the present invention.

[0039] Explanation of icon numbers:

[0040] label name label name 1 compressor 2 First heat exchanger 3 Expansion valve 4 Second heat exchanger 5 Energy storage unit 6 Circulating pump 7 Third heat exchanger 8 First temperature sensor 9 Second temperature sensor

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0043] This invention provides a control method for an air conditioner, applied to a cold storage air conditioner. The cold storage air conditioner includes an energy storage circuit, which includes a compressor, a first heat exchanger, and a second heat exchanger. The second heat exchanger is disposed in a cold storage tank and used to store energy in the cold storage tank. The method includes:

[0044] When the temperature value of the cold water storage tank is greater than or equal to a preset threshold, the temperature difference between the coil temperature of the first heat exchanger and the temperature value is determined.

[0045] The operating frequency is determined based on the temperature difference.

[0046] The compressor is controlled to operate according to the operating frequency, and the temperature difference is negatively correlated with the operating frequency.

[0047] The control method of the air conditioner of the present invention determines the temperature difference between the temperature value of the cold water tank and the coil temperature of the first heat exchanger when the temperature value of the cold water tank is greater than or equal to a preset threshold, so as to determine the current heat exchange capacity. The smaller the temperature difference, the stronger the current heat exchange capacity. Based on the negative correlation between temperature difference and operating frequency, when the temperature difference is smaller, a larger operating frequency is used to accelerate the ice storage speed. When the temperature difference is larger, it indicates that the current heat exchange capacity is worse and there is more liquid refrigerant in the pipe, which is easy to damage the compressor. A smaller operating frequency is used to protect the compressor.

[0048] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the terminal structure of the hardware operating environment involved in various embodiments of the air conditioner control method of the present invention.

[0049] The entity executing the air conditioner control method of the present invention can be an air conditioner.

[0050] like Figure 1 As shown, the air conditioner may include: a processor 101, a communication bus 102, and a memory 103. Those skilled in the art will understand that... Figure 1 The structural block diagram of the air conditioner shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements. The processor 101 is the control center of the air conditioner, the communication bus 102 is used to realize communication between the various components of the air conditioner, and the memory 103 stores the central control system and the control program of the air conditioner. The processor 101 executes the control program of the air conditioner stored in the memory 103 to implement the steps of the various embodiments of the air conditioner control method of the present invention.

[0051] Optionally, the air conditioner is a cold storage air conditioner. For an example, please refer to [link to example]. Figure 2 , Figure 2 This is a schematic diagram of the structural components of a cold storage air conditioner.

[0052] It should be noted that, please refer to Figure 3 , Figure 3 The system schematic diagram of the cold storage air conditioner, combined with Figure 2 The cold storage air conditioner includes an energy storage circuit and an energy release circuit. The energy storage circuit includes a compressor 1, a first heat exchanger 2, and a second heat exchanger 4. The second heat exchanger 4 is located in a cold storage tank (not shown in the figure) and is used to store energy in the cold storage tank. The energy release circuit includes an energy storage unit 5, a circulating pump 6, and a third heat exchanger 7.

[0053] Optionally, the energy storage unit 5 includes a cold storage tank and an outlet water control component (not shown in the figure), and the circulating pump 6 is a flow control component.

[0054] It should be noted that after the compressor 1 in the energy storage circuit is turned on, the high-temperature and high-pressure refrigerant is introduced into the first heat exchanger 2. Since the temperature of the outside airflow is lower than that of the refrigerant, the high-temperature and high-pressure refrigerant transfers heat to the outside airflow and its temperature decreases. The refrigerant with the lower temperature flows into the cold storage tank in the energy storage unit 5 through the expansion valve 3, and stores and makes ice by passing through the second heat exchanger 4 set in the cold storage tank to the cold storage agent such as water. When cooling is required, the cold storage agent such as cold water is circulated by the circulation pump 6, and the air is cooled by the third heat exchanger 7 to achieve refrigeration.

[0055] Optionally, the first heat exchanger 2 is a condensing heat exchanger.

[0056] Optionally, the second heat exchanger 4 is an ice storage heat exchanger or an ice making heat exchanger.

[0057] Optionally, the energy storage unit 5 is a refrigerator.

[0058] Optionally, the air conditioner includes, but is not limited to, a chilled water tank, a compressor, and a first heat exchanger.

[0059] Based on the above structural block diagram of the terminal device, various embodiments of the air conditioner control method of the present invention are proposed.

[0060] This invention provides a control method for an air conditioner; please refer to [the relevant documentation]. Figure 4 , Figure 4 This is a flowchart illustrating a first embodiment of the air conditioner control method of the present invention. In this embodiment, the air conditioner control method includes the following steps:

[0061] Step S10: When the temperature value of the cold water storage tank is greater than or equal to a preset threshold, determine the temperature difference between the coil temperature corresponding to the first heat exchanger and the temperature value.

[0062] Step S20: Determine the operating frequency based on the temperature difference;

[0063] Step S30: Control the compressor to operate according to the operating frequency;

[0064] The temperature difference is negatively correlated with the operating frequency.

[0065] The temperature of the chilled water storage tank can be obtained by a temperature detection device installed outside the tank or by a temperature detection device installed inside the tank; there is no limitation in this method. The coil temperature corresponding to the first heat exchanger can be obtained by obtaining the coil temperature at the middle of the first heat exchanger or by averaging the coil temperatures at multiple different locations on the first heat exchanger; there is no limitation in this method. Optionally, the coil temperature corresponding to the first heat exchanger refers to the coil temperature of the outdoor condenser.

[0066] The temperature difference between the temperature value and the coil temperature corresponding to the first heat exchanger can be determined by directly obtaining the difference between the temperature value and the coil temperature corresponding to the first heat exchanger.

[0067] As an optional implementation, step S20 includes:

[0068] When the temperature difference is less than or equal to the first preset temperature difference, the operating frequency is determined based on the frequency enhancement parameter and the current frequency;

[0069] When the temperature difference is greater than the first preset temperature difference and the temperature difference is less than the second preset temperature difference, the operating frequency is determined based on the current frequency and the constant frequency parameter.

[0070] When the temperature difference is greater than or equal to the second preset temperature difference, the operating frequency is determined according to the frequency reduction parameter and the current frequency, wherein the first preset temperature difference is less than the second preset temperature difference.

[0071] It should be noted that when the temperature difference is less than or equal to the first preset temperature difference, it indicates that the current heat exchange capacity is strong. The operating frequency can be determined based on the frequency boosting parameter and the current frequency, so that the determined operating frequency is greater than the current frequency. Optionally, the operating frequency can be determined by multiplying the frequency boosting parameter and the current frequency; alternatively, the operating frequency can be determined by summing the frequency boosting parameter and the current frequency.

[0072] When the temperature difference is greater than the first preset temperature difference and less than the second preset temperature difference, it indicates that the current heat exchange capacity is relatively strong. The operating frequency is determined based on the current frequency and the constant frequency parameter so that the determined operating frequency is equal to or close to the current frequency. Optionally, the operating frequency can be determined by obtaining the product of the constant frequency parameter and the current frequency; or by obtaining the sum of the constant frequency parameter and the current frequency.

[0073] When the temperature difference is greater than or equal to the second preset temperature difference, it indicates that the current heat exchange capacity is strong or weak. The operating frequency is determined based on the frequency reduction parameter and the current frequency, so that the determined operating frequency is less than the current frequency. Optionally, the operating frequency is determined based on the current frequency and the frequency reduction parameter. The product of the frequency reduction parameter and the current frequency can be obtained to determine the operating frequency; or the sum of the frequency reduction parameter and the current frequency can be obtained to determine the operating frequency.

[0074] It is understandable that the frequency increase parameter, constant frequency parameter, and frequency decrease parameter can be preset to correspond to different preset temperature difference ranges.

[0075] As an optional implementation, step S20 includes:

[0076] Obtain the preset temperature difference range in which the temperature difference lies;

[0077] The frequency coefficient of the operating frequency is determined based on the preset temperature difference range;

[0078] The operating frequency is determined based on the temperature value and the frequency coefficient. It should be noted that the specific implementation can be found in the second embodiment, and will not be specifically described in this embodiment.

[0079] Optionally, the control method for the air conditioner also includes:

[0080] When the temperature value in the cold water tank is less than the preset threshold, the operating frequency of the compressor is determined according to the temperature value, and the compressor is controlled to operate according to the operating frequency. The lower the temperature value, the lower the operating frequency of the compressor.

[0081] When the temperature in the cold storage tank is less than the preset threshold, it indicates that there is more ice than water in the cold storage tank. The operating frequency of the compressor can be determined based on the temperature value, and the compressor can be controlled to operate according to the operating frequency. The lower the temperature value, the greater the cold storage capacity in the cold storage tank, and the lower the operating frequency of the compressor. By controlling the compressor to operate at a lower operating frequency, ice can still be stored continuously.

[0082] In the technical solution disclosed in this embodiment, when the temperature value of the cold water storage tank is greater than or equal to a preset threshold, the temperature difference between the temperature value and the coil temperature corresponding to the first heat exchanger is determined to determine the current heat exchange capacity. The smaller the temperature difference, the stronger the current heat exchange capacity. Based on the negative correlation between temperature difference and operating frequency, when the temperature difference is smaller, a larger operating frequency is used to accelerate the ice storage speed. When the temperature difference is larger, it indicates that the current heat exchange capacity is worse and there is more liquid refrigerant in the pipe, which can easily damage the compressor. A smaller operating frequency is used to protect the compressor.

[0083] A second embodiment of the air conditioner control method of the present invention based on the first embodiment described above is provided below. Figure 5 , Figure 5 This is a schematic flowchart of a second embodiment of the control method for an air conditioner according to the present invention. In this embodiment, step S20 includes:

[0084] Step S21: Obtain the preset temperature difference range in which the temperature difference is located;

[0085] Step S22: Determine the frequency coefficient of the operating frequency based on the preset temperature difference range;

[0086] Step S23: Determine the operating frequency based on the temperature value and the frequency coefficient.

[0087] It should be noted that multiple temperature difference ranges and the frequency coefficient of the operating frequency corresponding to each temperature difference range can be preset. Given the temperature difference, the preset temperature difference range in which the temperature difference is located can be obtained, and then the frequency coefficient of the operating frequency corresponding to the preset temperature difference range can be obtained.

[0088] For example, three temperature difference intervals can be preset. Assuming the temperature difference is T, the three temperature difference intervals are T less than a first preset temperature difference (T11), T greater than or equal to the first preset temperature difference (T11) and T less than a second preset temperature difference (T12), and T greater than or equal to the second preset temperature difference (T12). The frequency coefficients of the operating frequency set for each temperature difference interval are Y, Y1, and Y2, respectively, where the first preset temperature difference is less than the second preset temperature difference.

[0089] As an optional implementation, step S23 determines the operating frequency based on the temperature value and the frequency coefficient. The product of the temperature value and the frequency coefficient can be obtained to determine the operating frequency. For example,

[0090] When T is less than T11, the product of the temperature value and the frequency coefficient Y is determined to determine the operating frequency, and frequency increase control is performed.

[0091] When T is greater than or equal to T11 and T is less than T12, the product of the temperature value and the frequency coefficient Y1 is determined to determine the operating frequency, and the current operating frequency is maintained.

[0092] When T is greater than or equal to T12, the product of the temperature value and the frequency coefficient Y2 is determined to determine the operating frequency, and frequency reduction control is performed.

[0093] As an optional implementation, step S23 determines the operating frequency based on the temperature value and the frequency coefficient. The sum of the temperature value and the frequency coefficient can be obtained to determine the operating frequency. For example,

[0094] When T is less than T11, the sum of the temperature value and the frequency coefficient Y is determined to determine the operating frequency, and frequency boosting control is performed.

[0095] When T is greater than or equal to T11 and T is less than T12, the sum of the temperature value and the frequency coefficient Y1 is determined to determine the operating frequency, and the current operating frequency is maintained.

[0096] When T is greater than or equal to T12, the sum of the temperature value and the frequency coefficient Y2 is determined to determine the operating frequency, and frequency reduction control is performed.

[0097] In the technical solution disclosed in this embodiment, the temperature difference between the coil temperature of the first heat exchanger and the temperature value of the cold storage water tank is determined. The frequency coefficient of the operating frequency is determined according to the preset temperature difference range in which the temperature difference is located. The operating frequency is determined according to the temperature value and the frequency coefficient, so that when the compressor runs according to the operating frequency, the discharge pressure, suction pressure and suction-discharge pressure ratio can be limited to a reliable range. This prevents the compressor from being damaged due to unreasonable suction and discharge pressure during the cold storage process, while improving the ice storage speed.

[0098] A third embodiment of the air conditioner control method of the present invention based on the second embodiment described above. Please refer to... Figure 6 , Figure 6 This is a flowchart illustrating a third embodiment of the air conditioner control method of the present invention. In this embodiment, the air conditioner control method further includes:

[0099] Step S40: After receiving the cold storage command and the air conditioner compressor is running at the initial operating frequency, the first temperature value of the cold storage water tank and the first coil temperature corresponding to the first heat exchanger are obtained.

[0100] Step S50: When the first temperature value and the first coil temperature meet the preset conditions, reduce the operating frequency of the compressor, and control the compressor to run at the reduced operating frequency, then obtain the second temperature value of the cold water tank and the second coil temperature corresponding to the first heat exchanger.

[0101] Step S60: When the second temperature value and the second coil temperature do not meet the preset conditions, obtain the current temperature value of the cold water storage tank and execute step S10.

[0102] The cold storage command can be triggered either by receiving a cold storage command from the remote control that comes with the cold storage air conditioner, or by receiving a timed cold storage command; there is no limitation on which one is triggered.

[0103] In the initial stage of cold storage, the air conditioner compressor is controlled to operate at the initial operating frequency to store cold by using a larger ice storage rate. During the cold storage process, in order to avoid the water temperature of the cold storage tank being too high or the heat dissipation of the first heat exchanger being poor, which would lead to abnormal operation of the compressor or even damage to the compressor, the first temperature value of the cold storage tank and the temperature of the first coil of the first heat exchanger are obtained. By determining whether the first temperature value and the temperature of the first coil meet the preset conditions, it is determined that the water temperature of the cold storage tank is too high or the heat dissipation of the first heat exchanger is poor.

[0104] It is easy to understand that when the first temperature value and the first coil temperature meet the preset conditions, it indicates that the water temperature of the cold water tank is too high or the heat dissipation of the first heat exchanger is poor; when the first temperature value and the first coil temperature do not meet the preset conditions, it indicates that the water temperature of the cold water tank is at a normal temperature or the heat dissipation of the first heat exchanger is in good condition.

[0105] Optionally, if the first temperature value and the first coil temperature do not meet the preset conditions, the compressor can be controlled to run continuously at the initial operating frequency to store cold at a larger ice storage rate and accelerate the ice storage speed.

[0106] Optionally, the preset conditions include any one of the following:

[0107] The temperature value is greater than the first preset temperature and the coil temperature is greater than the second preset temperature;

[0108] The temperature value is greater than the first preset temperature and the coil temperature is less than or equal to the second preset temperature;

[0109] The temperature value is less than or equal to the first preset temperature and the coil temperature is greater than the second preset temperature, wherein the preset threshold is less than the first preset temperature, the temperature value is the first temperature value or the second temperature value, and the coil temperature is the first coil temperature or the second coil temperature.

[0110] It should be noted that the first and second preset temperatures can be set in advance or determined based on the current indoor ambient temperature; there is no limitation on this. The temperature value is either the first or the second temperature value, and the coil temperature is either the first or the second coil temperature.

[0111] It is easy to understand that if the temperature value is greater than the first preset temperature and the coil temperature is greater than the second preset temperature, it indicates that the water temperature in the cold storage tank is too high and the first heat exchanger is not dissipating heat well; if the temperature value is greater than the first preset temperature and the coil temperature is less than or equal to the second preset temperature, it indicates that the water temperature in the cold storage tank is too high and the first heat exchanger is dissipating heat well; if the temperature value is less than or equal to the first preset temperature and the coil temperature is greater than the second preset temperature, it indicates that the water temperature in the cold storage tank is normal and the first heat exchanger is not dissipating heat well.

[0112] As an optional implementation, step S60 includes:

[0113] When the second temperature value and the second coil temperature do not meet the preset conditions, the compressor is controlled to run at the initial frequency for a preset time, the current temperature value of the cold water tank is obtained, and step S10 is executed.

[0114] When the second temperature value and the second coil temperature do not meet the preset conditions, it indicates that the water temperature of the cold water tank after frequency reduction operation is at a normal temperature or the heat dissipation of the first heat exchanger is in good condition. After controlling the compressor to run at the initial frequency for a preset time, the compressor is made to run at a larger operating frequency to accelerate the ice storage speed. The current temperature value of the cold water tank is obtained, and steps S10, S20 and S30 are executed to determine the operating frequency through the temperature difference between the temperature value of the cold water tank and the coil temperature corresponding to the first heat exchanger, and the compressor is controlled to run according to the operating frequency.

[0115] Optionally, after obtaining the second temperature value of the cold water storage tank and the second coil temperature corresponding to the first heat exchanger in step S50, the method further includes:

[0116] When the second temperature value and the second coil temperature meet the preset conditions, the compressor is controlled to perform a shutdown operation.

[0117] When the second temperature value and the second coil temperature meet the preset conditions, it indicates that the water temperature of the cold water tank after frequency reduction operation is still too high or the heat dissipation of the first heat exchanger is still in a poor state. In order to avoid damaging the compressor, the compressor is controlled to perform a shutdown operation to protect the compressor.

[0118] In the technical solution disclosed in this embodiment, during the cold storage process after receiving the cold storage command, if the first temperature value of the cold storage water tank and the first coil temperature corresponding to the first heat exchanger meet the preset conditions, it is determined that the current water temperature of the cold storage water tank is too high or the heat dissipation of the first heat exchanger is poor. To avoid uncontrollable compressor reliability, frequency reduction processing is used to reduce the water temperature of the cold storage water tank or improve the heat dissipation of the first heat exchanger while operating at a lower frequency for cold storage. Compared to directly controlling the compressor to stop operation when the current water temperature of the cold storage water tank is too high or the heat dissipation of the first heat exchanger is poor, this method can accelerate the cold storage process. Furthermore, after controlling the compressor to operate at the reduced operating frequency, the second temperature value of the cold water storage tank and the temperature of the second coil corresponding to the first heat exchanger are obtained. The second temperature value and the second coil temperature are used to further determine whether the current water temperature of the cold water storage tank is too high or whether the heat dissipation of the first heat exchanger is poor. When it is determined that the current water temperature of the cold water storage tank is in a normal state and the heat dissipation of the first heat exchanger is in a good state, the current temperature value of the cold water storage tank is obtained, and the operating frequency is determined by the temperature difference between the temperature value of the cold water storage tank and the temperature of the coil corresponding to the first heat exchanger. The compressor is then controlled to operate according to the operating frequency.

[0119] The present invention also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor, wherein when the control program for the air conditioner is executed by the processor, it implements the steps of the control method for the air conditioner in any of the above embodiments.

[0120] The present invention also proposes a computer-readable storage medium storing a control program for an air conditioner, wherein the control program for the air conditioner, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the above embodiments.

[0121] In the embodiments of the terminal device and readable storage medium provided by the present invention, all the technical features of the various embodiments of the control method for the air conditioner described above are included. The extended and explanatory contents of the specification are basically the same as those of the various embodiments of the control method for the air conditioner described above, and will not be repeated here.

[0122] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, An application is made in a cold storage air conditioner, the cold storage air conditioner including an energy storage circuit, the energy storage circuit including a compressor, a first heat exchanger and a second heat exchanger, the second heat exchanger being disposed in a cold storage tank and used to store energy into the cold storage tank, the method including: When the temperature value of the cold water storage tank is greater than or equal to a preset threshold, the temperature difference between the coil temperature of the first heat exchanger and the temperature value is determined. The operating frequency is determined based on the temperature difference. The compressor is controlled to operate according to the operating frequency, and the temperature difference is negatively correlated with the operating frequency. Controlling the compressor to operate according to the operating frequency includes: When the temperature difference is less than or equal to the first preset temperature difference, the current operating frequency is increased to the operating frequency. When the temperature difference is greater than the first preset temperature difference and less than the second preset temperature difference, the current operating frequency is maintained. When the temperature difference is greater than or equal to the second preset temperature difference, the current operating frequency is reduced to the operating frequency, wherein the first preset temperature difference is less than the second preset temperature difference.

2. The control method for an air conditioner as described in claim 1, characterized in that, The step of determining the operating frequency based on the temperature difference includes: Obtain the preset temperature difference range in which the temperature difference lies; The frequency coefficient of the operating frequency is determined based on the preset temperature difference range; The operating frequency is determined based on the temperature value and the frequency coefficient.

3. The control method for an air conditioner as described in claim 1, characterized in that, The step of determining the operating frequency based on the temperature difference includes: When the temperature difference is less than or equal to the first preset temperature difference, the operating frequency is determined based on the frequency enhancement parameter and the current frequency; When the temperature difference is greater than the first preset temperature difference and the temperature difference is less than the second preset temperature difference, the operating frequency is determined based on the current frequency and the constant frequency parameter. When the temperature difference is greater than or equal to the second preset temperature difference, the operating frequency is determined according to the frequency reduction parameter and the current frequency, wherein the first preset temperature difference is less than the second preset temperature difference.

4. The control method for an air conditioner as described in claim 1, characterized in that, The control method for the air conditioner also includes: When the temperature value in the cold water tank is less than the preset threshold, the operating frequency of the compressor is determined according to the temperature value, and the compressor is controlled to operate according to the operating frequency. The lower the temperature value, the lower the operating frequency of the compressor.

5. The control method for an air conditioner as described in claim 1, characterized in that, The control method for the air conditioner also includes: After receiving the cold storage command and the air conditioner compressor running at the initial operating frequency, the first temperature value of the cold storage water tank and the first coil temperature corresponding to the first heat exchanger are obtained. When the first temperature value and the first coil temperature meet the preset conditions, the operating frequency of the compressor is reduced, and the compressor is controlled to run at the reduced operating frequency to obtain the second temperature value of the cold water tank and the second coil temperature corresponding to the first heat exchanger. When the second temperature value and the second coil temperature do not meet the preset conditions, the current temperature value of the cold water storage tank is obtained, and the step of determining the temperature difference between the coil temperature corresponding to the first heat exchanger and the temperature value is executed when the temperature value of the cold water storage tank is greater than or equal to the preset threshold.

6. The control method for an air conditioner as described in claim 5, characterized in that, The step of obtaining the current temperature value of the cold water storage tank when the second temperature value and the second coil temperature do not meet the preset conditions, and performing the step of determining the temperature difference between the coil temperature corresponding to the first heat exchanger and the temperature value when the temperature value of the cold water storage tank is greater than or equal to a preset threshold, includes: When the second temperature value and the second coil temperature do not meet the preset conditions, the compressor is controlled to run at the initial frequency for a preset time, the current temperature value of the cold water tank is obtained, and the step of determining the temperature difference between the coil temperature of the first heat exchanger and the temperature value is executed when the temperature value of the cold water tank is greater than or equal to the preset threshold.

7. The control method for an air conditioner as described in claim 5, characterized in that, After the step of obtaining the second temperature value of the cold water storage tank and the second coil temperature corresponding to the first heat exchanger, the method further includes: When the second temperature value and the second coil temperature meet the preset conditions, the compressor is controlled to perform a shutdown operation.

8. The control method for an air conditioner as described in claim 5, characterized in that, The preset conditions include any one of the following conditions: The temperature value is greater than the first preset temperature and the coil temperature is greater than the second preset temperature; The temperature value is greater than the first preset temperature and the coil temperature is less than or equal to the second preset temperature; The temperature value is less than or equal to the first preset temperature and the coil temperature is greater than the second preset temperature, wherein the preset threshold is less than the first preset temperature, the temperature value is the first temperature value or the second temperature value, and the coil temperature is the first coil temperature or the second coil temperature.

9. An air conditioner, characterized in that, The air conditioner includes: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor. When the control program for the air conditioner is executed by the processor, it implements the steps of the control method for the air conditioner as described in any one of claims 1-8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 1-8.

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