Low-temperature control method and device, and air conditioning unit

Abstract

This invention discloses a low-temperature control method and device, and an air conditioning unit. The method includes: obtaining the low-temperature cooling inlet temperature of the target air conditioning unit as a first temperature threshold; adding a preset temperature value to the first temperature threshold as a second temperature threshold; obtaining the current outer ring temperature of the target air conditioning unit; when the current outer ring temperature is lower than the first temperature threshold, controlling the target air conditioning unit to enter a low-temperature cooling speed regulation state; in the low-temperature cooling speed regulation state, adjusting the fan speeds of the indoor and outdoor fans of the target air conditioning unit according to the rate of change of the outer ring temperature, the inner pipe temperature, and the outer pipe temperature; when the current outer ring temperature is higher than the second temperature threshold, controlling the target air conditioning unit to exit the low-temperature cooling speed regulation state. This solution effectively improves the flexibility of air conditioning control and saves air conditioning energy consumption.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and more specifically, to a low-temperature control method and device, and an air conditioning unit. Background Technology

[0002] Currently, the method for addressing the evaporator frosting issue in air conditioning units in low-temperature environments is generally based on the outdoor temperature and the preset outdoor temperature range corresponding to the low-temperature cooling mode, which determines the outdoor fan speed. In this method, the outdoor fan speed corresponds one-to-one with the outer ring temperature, ignoring the fact that air conditioning operation is a dynamic process and not taking into account the indoor unit environment and the heat exchange situation of the indoor unit. This will lead to the problem of indoor unit frosting in low-temperature environments due to unreasonable outer ring speed settings.

[0003] Furthermore, some air conditioner outdoor units use low-temperature refrigeration controllers to adjust the fan speed. However, the condenser outlet temperature is closely related to the air conditioner's operating load. If the decision to increase or decrease the fan speed is based solely on the pipe temperature, there will be over-adjustment, failing to achieve the goal of comfort and energy saving.

[0004] There are currently no effective solutions to the problems of excessively low evaporator temperature causing frost buildup in the indoor unit during low-temperature cooling, and the problems of excessive fan speed adjustment affecting comfort and increasing energy consumption. Summary of the Invention

[0005] This invention provides a low-temperature control method and device, and an air conditioning unit, to solve the technical problem in the prior art where the evaporator temperature is too low during low-temperature cooling, causing frost to form on the indoor unit, affecting air conditioning comfort, and increasing energy consumption.

[0006] To solve the above-mentioned technical problems, the present invention provides a low-temperature control method, the method comprising:

[0007] The low-temperature cooling inlet temperature of the target air conditioning unit is obtained as the first temperature threshold, and the first temperature threshold is increased by a preset temperature value to obtain the second temperature threshold.

[0008] Obtain the current outer ring temperature of the target air conditioning unit;

[0009] When the current outer ring temperature is lower than the first temperature threshold, the target air conditioning unit is controlled to enter a low-temperature cooling speed regulation state. In the low-temperature cooling speed regulation state, the fan speed of the inner and outer fans of the target air conditioning unit is adjusted according to the rate of change of the outer ring temperature, the inner pipe temperature and the outer pipe temperature of the target air conditioning unit.

[0010] If the current outer ring temperature is higher than the second temperature threshold, control the target air conditioning unit to exit the low-temperature cooling speed regulation state.

[0011] In one embodiment, adjusting the fan speeds of the indoor and outdoor fans of the target air conditioning unit according to the rate of change of the outer ring temperature, the inner pipe temperature, and the outer pipe temperature of the target air conditioning unit includes:

[0012] When the indoor and outdoor fans of the target air conditioning unit are running, determine the temperature range to which the current outer ring temperature belongs;

[0013] Determine the initial fan speed of the indoor and outdoor fans of the target air conditioning unit based on the temperature range it belongs to;

[0014] The internal and external fans are controlled to operate at the initial fan speed. After a predetermined operating time, the fan speed of the internal and external fans of the target air conditioning unit is adjusted in conjunction with the rate of change of the internal pipe temperature and the rate of change of the external pipe temperature.

[0015] In one embodiment, the fan speed of the indoor and outdoor fans of the target air conditioning unit is adjusted in a coordinated manner based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature, including:

[0016] When the temperature of the outer pipe is greater than or equal to the first temperature and less than or equal to the second temperature, the fan speed of the outer fan remains unchanged, and the temperature of the inner pipe is continuously monitored. When the rate of change of the inner pipe temperature is greater than the preset first rate of change threshold, the fan speed of the inner fan is increased by one level.

[0017] When the external pipe temperature is greater than the second temperature, the fan speed of the external fan is increased by one level every predetermined time period until the external pipe temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The external pipe temperature is continuously monitored. When the rate of change of the external pipe temperature is greater than the preset second rate of change threshold, the fan speed of the external fan is kept unchanged. The internal pipe temperature is continuously monitored. When the rate of change of the internal pipe temperature is greater than the preset first rate of change threshold, the fan speed of the internal fan is increased by one level.

[0018] When the external pipe temperature is lower than the first temperature, the fan speed of the external fan is reduced by one level every predetermined time period until the external pipe temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The internal pipe temperature is continuously monitored. When the rate of change of the internal pipe temperature is greater than the preset first rate of change threshold, the fan speed of the internal fan is increased by one level.

[0019] In one embodiment, the rate of change of the outer tube temperature is the rate of change of the condenser tube temperature, and the rate of change of the inner tube temperature is the rate of change of the evaporator tube temperature.

[0020] In one embodiment, the fan speed of the indoor and outdoor fans of the target air conditioning unit is adjusted in a coordinated manner based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature, including:

[0021] Determine whether the outer ring temperature is lower than the third temperature threshold;

[0022] If the outer ring temperature is lower than the third temperature threshold, determine the temperature range to which the outer ring temperature belongs;

[0023] Determine the allowable airflow range for the external fan corresponding to the temperature range;

[0024] During the process of adjusting the speed of the indoor and outdoor fans of the target air conditioning unit in conjunction with the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature, the outdoor fan is controlled to operate within the allowable fan speed range.

[0025] In one implementation, it further includes:

[0026] When the current ambient temperature is higher than or equal to the first temperature threshold but lower than the second temperature threshold, the outdoor fan of the target air conditioning unit is controlled to operate at the highest fan speed.

[0027] The present invention also provides a cryogenic control device, comprising:

[0028] The first acquisition module is used to acquire the low-temperature cooling entry temperature of the target air conditioning unit as a first temperature threshold, and add a preset temperature value to the first temperature threshold as a second temperature threshold.

[0029] The second acquisition module is used to acquire the current outer ring temperature of the target air conditioning unit;

[0030] The first control module is used to control the target air conditioning unit to enter a low-temperature cooling speed regulation state when the current outer ring temperature is lower than the first temperature threshold. In the low-temperature cooling speed regulation state, the fan speed of the inner and outer fans of the target air conditioning unit is adjusted according to the rate of change of the outer ring temperature, the inner pipe temperature and the outer pipe temperature of the target air conditioning unit.

[0031] The second control module is used to control the target air conditioning unit to exit the low-temperature cooling speed regulation state when the current outer ring temperature is higher than the second temperature threshold.

[0032] In one implementation, the first control module includes:

[0033] The first determining unit is used to determine the temperature range to which the current outer ring temperature belongs when the indoor and outdoor fans of the target air conditioning unit are turned on.

[0034] The second determining unit is used to determine the initial fan speed of the indoor and outdoor fans of the target air conditioning unit according to the temperature range to which they belong;

[0035] The control unit is used to control the indoor and outdoor fans to operate according to the initial fan speed. After a predetermined operating time, the control unit performs linkage speed regulation control on the fan speed of the indoor and outdoor fans of the target air conditioning unit according to the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit.

[0036] The present invention also provides an air conditioning unit, including the aforementioned low-temperature control device.

[0037] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method.

[0038] The present invention also provides an electronic device, comprising: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the one or more processors to perform the method as described above.

[0039] By applying the technical solution of this invention, the low-temperature cooling entry temperature of the target air conditioning unit is used as the first temperature threshold, and a preset temperature value is added to the first temperature threshold as the second temperature threshold. Then, the relationship between the current outer ring temperature and the first and second temperature thresholds is determined, thereby controlling the air conditioning unit to enter or exit the low-temperature cooling speed regulation state. In the low-temperature cooling speed regulation state, the fan speeds of the indoor and outdoor fans of the target air conditioning unit are adjusted according to the rate of change of the outer ring temperature, the rate of change of the inner pipe temperature, and the rate of change of the outer pipe temperature. This solves the technical problem that existing fixed conditions, without considering the changing process, lead to excessively low evaporator temperature during low-temperature cooling, causing frost formation on the indoor unit and affecting the comfort of air conditioning. This achieves the technical effect of effectively improving the flexibility of air conditioning control and saving air conditioning energy consumption. Attached Figure Description

[0040] Figure 1 This is a flowchart of a low-temperature control method according to an embodiment of the present invention;

[0041] Figure 2 This is a flowchart of the low-temperature refrigeration speed regulation control according to an embodiment of the present invention;

[0042] Figure 3 This is a flowchart of the initialization windshield control according to an embodiment of the present invention;

[0043] Figure 4 This is a structural block diagram of a cryogenic control device according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the architecture of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0046] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0047] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0049] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0050] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0051] Example 1

[0052] Figure 1 This is a flowchart of a low-temperature control method according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0053] Step S101: Obtain the low-temperature cooling entry temperature of the target air conditioning unit as the first temperature threshold, and add a preset temperature value to the first temperature threshold as the second temperature threshold.

[0054] Step S102: Obtain the current outer ring temperature of the target air conditioning unit;

[0055] Step S103: When the current outer ring temperature is lower than the first temperature threshold, control the target air conditioning unit to enter the low temperature cooling speed regulation state. In the low temperature cooling speed regulation state, adjust the fan speed of the inner and outer fans of the target air conditioning unit according to the rate of change of the outer ring temperature, the inner pipe temperature and the outer pipe temperature of the target air conditioning unit.

[0056] Step S104: If the current outer ring temperature is higher than the second temperature threshold, control the target air conditioning unit to exit the low-temperature cooling speed regulation state.

[0057] Considering that data is relatively scarce at startup, making effective linkage control impossible, in this example, under low-temperature cooling speed regulation mode, the current outer ring temperature range can be determined when the indoor and outdoor fans of the target air conditioning unit are running. Based on the temperature range, the initial fan speed of the indoor and outdoor fans of the target air conditioning unit is determined. The indoor and outdoor fans are controlled to run at the initial fan speed. After a predetermined running time, the fan speed of the indoor and outdoor fans of the target air conditioning unit is linked and adjusted according to the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit.

[0058] That is, the fan speed at startup is determined by preset multiple temperature ranges for the outer ring temperature. After running for a certain period of time, the fan speed of the inner and outer fans is then adjusted in tandem based on the rate of change of the inner and outer pipe temperatures.

[0059] For example, when the outer ring temperature is < -10°C, the initial fan speed is set to level 1; when the outer ring temperature is -10 ≤ 0°C, the initial fan speed is set to level 3; when the outer ring temperature is 0 ≤ 10°C, the initial fan speed is set to level 5; when the outer ring temperature is 10 ≤ 20°C, the initial fan speed is set to level 7; and when the outer ring temperature is ≥ 20°C, the initial fan speed is set to level 9. After running for 5 minutes, the fan speed is adjusted according to the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature.

[0060] However, it is worth noting that the gear and temperature range values ​​given above are only exemplary descriptions. In actual implementation, other values ​​can be adopted according to the actual operating environment and unit characteristics. This application does not limit this.

[0061] Specifically, based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit, the fan speed of the inner and outer fans of the target air conditioning unit is adjusted in a coordinated manner, which may include:

[0062] 1) When the temperature of the outer pipe is greater than or equal to the first temperature and less than or equal to the second temperature, keep the fan speed of the outer fan unchanged and continuously monitor the temperature of the inner pipe. If the rate of change of the inner pipe temperature is greater than the preset first rate of change threshold, then increase the fan speed of the inner fan by one level.

[0063] 2) When the external pipe temperature is greater than the second temperature, the fan speed of the external fan is increased by one level every predetermined time period until the external pipe temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The external pipe temperature is continuously monitored. When the rate of change of the external pipe temperature is greater than the preset second rate of change threshold, the fan speed of the external fan is kept unchanged. The internal pipe temperature is continuously monitored. When the rate of change of the internal pipe temperature is greater than the preset first rate of change threshold, the fan speed of the internal fan is increased by one level.

[0064] 3) When the temperature of the outer pipe is lower than the first temperature, the fan speed of the outer fan is reduced by one level for a predetermined period of time until the temperature of the outer pipe is greater than or equal to the first temperature and less than or equal to the second temperature. The temperature of the inner pipe is continuously monitored. If the rate of change of the inner pipe temperature is greater than the preset first rate of change threshold, the fan speed of the inner fan is increased by one level.

[0065] That is, the speed control of the internal and external fans can be adjusted through the above-mentioned linkage control logic.

[0066] In practice, the rate of change of the outer tube temperature can be the rate of change of the condenser tube temperature, and the rate of change of the inner tube temperature can be the rate of change of the evaporator tube temperature.

[0067] To prevent over-adjustment of the fan speed, when controlling the speed of the indoor and outdoor fans of the target air conditioning unit in conjunction with the rate of change of the inner and outer pipe temperatures, a speed range can be set. Specifically, it can be determined whether the outer ring temperature is lower than a third temperature threshold; if the outer ring temperature is lower than the third temperature threshold, the temperature range to which the outer ring temperature belongs is determined; the allowable fan speed range for the outdoor fan corresponding to the temperature range is determined; during the process of controlling the speed of the indoor and outdoor fans of the target air conditioning unit in conjunction with the rate of change of the inner and outer pipe temperatures, the outdoor fan is controlled to operate within the allowable fan speed range.

[0068] When the target air conditioning unit is powered on for the first time, if the current ambient temperature is higher than or equal to the first temperature threshold but lower than the second temperature threshold, the outdoor fan of the target air conditioning unit can be controlled to run at the highest fan speed. For example, if the highest speed is level 10, then it will be controlled to run at level 10.

[0069] In the example above, the low-temperature cooling entry temperature of the target air conditioning unit is used as the first temperature threshold, and a preset temperature value is added to the first temperature threshold to form the second temperature threshold. Then, the relationship between the current outer ring temperature and the first and second temperature thresholds is determined, thereby controlling the air conditioning unit to enter or exit the low-temperature cooling speed regulation state. In the low-temperature cooling speed regulation state, the fan speeds of the indoor and outdoor fans of the target air conditioning unit are adjusted according to the rate of change of the outer ring temperature, the rate of change of the inner pipe temperature, and the rate of change of the outer pipe temperature. This solves the technical problem of the existing fixed conditions that do not consider the changing process, resulting in the evaporator temperature being too low during low-temperature cooling, causing the indoor unit to frost, which affects the comfort of air conditioning. This achieves the technical effect of effectively improving the flexibility of air conditioning control and saving air conditioning energy consumption.

[0070] Example 2

[0071] The above method will be described below with reference to a specific embodiment. However, it is worth noting that this specific embodiment is only for better illustration of this application and does not constitute an improper limitation of this application.

[0072] In this example, by detecting the rate of change of the outer ring temperature, the T inner pipe temperature, and the T outer pipe temperature, the actual operating status of the air conditioner is fed back in real time. During low-temperature cooling, the fan speed is adjusted in conjunction with the air conditioner to prevent the indoor unit from frosting, meet the user's comfort requirements, and achieve the goal of saving energy.

[0073] Specifically, it provides a control method that can be such as Figure 2 As shown, it includes:

[0074] S1: Initialize fan speed control, such as Figure 3 As shown:

[0075] In cooling or dehumidification mode:

[0076] 1) When it is determined that T_outer_ring < T_low_temperature_cooling_entry_temperature, the system enters the low-temperature_cooling_speed_regulation state;

[0077] 2) When it is determined that T_outer_ring ≥ [T_low_temperature_cooling_entry_temperature] + 3, the low_temperature_cooling_speed_regulation_state is exited, and the external motor's operating fan speed is only the highest fan speed 10.

[0078] 3) When [T low temperature cooling entry temperature] ≤ T outer ring < [T low temperature cooling entry temperature] + 3, the previous operation status will be maintained (on first power-on, when the ambient temperature is within this range, the outdoor fan will run at the highest fan speed of 10).

[0079] S2: Low-temperature refrigeration speed control:

[0080] 1) After the outdoor fan starts running, the initial fan speed for each ambient temperature range is shown in Table 1 below:

[0081] Table 1

[0082]

[0083] 2) After running for 5 minutes, adjust the fan speed according to the temperature change rates of the outer ring (T), inner pipe (T), and outer pipe (T):

[0084] When 35℃≤T_outer_pipe≤48℃, the outdoor fan speed remains unchanged; thereafter, the temperature change rate of the inner pipe is continuously monitored. If the temperature change rate of the evaporator pipe k > the preset change rate k1, the indoor fan speed is increased by one level to prevent the indoor unit from frosting due to the evaporation temperature being too low, which would affect heat exchange.

[0085] When the temperature of the T-outer pipe is greater than 48℃, the outdoor fan speed increases by one level every 60 seconds until the T-outer pipe temperature falls within the range of 35℃≤T-outer pipe≤48℃. After that, the condenser pipe temperature change rate is continuously monitored. If the condenser pipe temperature change rate k is greater than the preset change rate k2, the outdoor fan speed remains unchanged. After that, the evaporator pipe temperature change rate is continuously monitored. If the evaporator pipe temperature change rate k is greater than the preset change rate k1, the indoor fan speed is increased by one level to prevent the indoor unit from frosting due to excessively low evaporation temperature, which would affect heat exchange.

[0086] When the temperature of the outer tube T is less than 35°C, the outdoor fan speed is reduced by one level every 60 seconds until the temperature of the outer tube T falls within the range of 35°C ≤ T ≤ 48°C. After that, the evaporator tube temperature change rate is continuously monitored. If the evaporator tube temperature change rate k > the preset change rate k1, the indoor fan speed is increased by one level to prevent the indoor unit from frosting due to the evaporation temperature being too low, which would affect heat exchange.

[0087] S3: Over-adjustment prevention control:

[0088] To prevent over-adjustment of the fan speed, if the outer ring temperature is below 20℃, the speed of the external fan should be set according to the rules in Table 2 below:

[0089] Table 2

[0090]

[0091] In the example above, the temperature of the outer ring determines whether to enter the low-temperature cooling speed regulation state. When the low-temperature cooling speed regulation state is entered, the initial fan speed is determined according to the temperature range of the outer environment, and the fan speed regulation is linked according to the temperature change rate of the outer ring (T), the inner pipe (T), and the outer pipe (T). When the outer ring (T) is at a low temperature, the outdoor fan performs over-adjustment control.

[0092] In the example above, the low-temperature cooling entry temperature of the target air conditioning unit is used as the first temperature threshold, and a preset temperature value is added to the first temperature threshold to form the second temperature threshold. Then, the relationship between the current outer ring temperature and the first and second temperature thresholds is determined, thereby controlling the air conditioning unit to enter or exit the low-temperature cooling speed regulation state. In the low-temperature cooling speed regulation state, the fan speeds of the indoor and outdoor fans of the target air conditioning unit are adjusted according to the rate of change of the outer ring temperature, the rate of change of the inner pipe temperature, and the rate of change of the outer pipe temperature. This solves the technical problem of the existing fixed conditions that do not consider the changing process, resulting in the evaporator temperature being too low during low-temperature cooling, causing the indoor unit to frost, which affects the comfort of air conditioning. This achieves the technical effect of effectively improving the flexibility of air conditioning control and saving air conditioning energy consumption.

[0093] Example 3

[0094] Corresponding to Figure 1 The low-temperature control method described herein is illustrated in this embodiment, which provides a low-temperature control device, such as... Figure 4 The diagram shown illustrates the structure of a cryogenic control device, which may include:

[0095] The first acquisition module 401 is used to acquire the low-temperature cooling entry temperature of the target air conditioning unit as a first temperature threshold, and add a preset temperature value to the first temperature threshold as a second temperature threshold.

[0096] The second acquisition module 402 is used to acquire the current outer ring temperature of the target air conditioning unit;

[0097] The first control module 403 is used to control the target air conditioning unit to enter a low-temperature cooling speed regulation state when the current outer ring temperature is lower than the first temperature threshold. In the low-temperature cooling speed regulation state, the fan speed of the inner and outer fans of the target air conditioning unit is adjusted according to the rate of change of the outer ring temperature, the inner pipe temperature and the outer pipe temperature of the target air conditioning unit.

[0098] The second control module 404 is used to control the target air conditioning unit to exit the low-temperature cooling speed regulation state when the current outer ring temperature is higher than the second temperature threshold.

[0099] In one embodiment, the first control module 403 may include: a first determining unit, configured to determine the temperature range to which the current outer ring temperature belongs when the indoor and outdoor fans of the target air conditioning unit are turned on; a second determining unit, configured to determine the initial fan speed of the indoor and outdoor fans of the target air conditioning unit according to the temperature range; and a control unit, configured to control the indoor and outdoor fans to operate according to the initial fan speed, and after a predetermined operating time, to perform linkage speed regulation control on the fan speed of the indoor and outdoor fans of the target air conditioning unit according to the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit.

[0100] In one embodiment, the coordinated speed control of the indoor and outdoor fan speeds of the target air conditioning unit based on the rate of change of the indoor pipe temperature and the rate of change of the outdoor pipe temperature may include: when the outdoor pipe temperature is greater than or equal to a first temperature and less than or equal to a second temperature, keeping the outdoor fan speed constant while continuously monitoring the indoor pipe temperature; when the rate of change of the indoor pipe temperature is greater than a preset first rate of change threshold, increasing the indoor fan speed by one level; when the outdoor pipe temperature is greater than the second temperature, increasing the outdoor fan speed by one level every predetermined time interval until the outdoor pipe temperature is greater than or equal to the first temperature and less than... The external duct temperature is set to the second temperature, and the external duct temperature is continuously monitored. If the rate of change of the external duct temperature is greater than the preset second rate of change threshold, the fan speed of the external fan remains unchanged, and the internal duct temperature is continuously monitored. If the rate of change of the internal duct temperature is greater than the preset first rate of change threshold, the fan speed of the internal fan is increased by one level. If the external duct temperature is less than the first temperature, the fan speed of the external fan is decreased by one level every predetermined time interval until the external duct temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The internal duct temperature is continuously monitored, and if the rate of change of the internal duct temperature is greater than the preset first rate of change threshold, the fan speed of the internal fan is increased by one level.

[0101] In one embodiment, the rate of change of the outer tube temperature can be the rate of change of the condenser tube temperature, and the rate of change of the inner tube temperature can be the rate of change of the evaporator tube temperature.

[0102] In one embodiment, the coordinated speed control of the indoor and outdoor fans of the target air conditioning unit based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature may include: determining whether the outer ring temperature is lower than a third temperature threshold; if the outer ring temperature is lower than the third temperature threshold, determining the temperature range to which the outer ring temperature belongs; determining the allowable fan speed range of the outdoor fan corresponding to the temperature range; and controlling the outdoor fan to operate within the allowable fan speed range during the coordinated speed control of the indoor and outdoor fans of the target air conditioning unit based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature.

[0103] In one embodiment, the method further includes: when the target air conditioning unit is powered on for the first time, if the current ambient temperature is higher than or equal to the first temperature threshold and lower than the second temperature threshold, then controlling the outdoor fan of the target air conditioning unit to operate at the highest fan speed.

[0104] Example 4

[0105] like Figure 5 As shown, this embodiment provides an electronic device 10, which may include one or more (only one is shown in the figure) processors 02 (processors 02 may include, but are not limited to, microprocessors MCUs or programmable logic devices FPGAs, etc.), a memory 04 for storing data, and a transmission module 06 for communication functions. Those skilled in the art will understand that... Figure 5 The structure shown is for illustrative purposes only and does not limit the structure of the electronic device described above. For example, electronic device 10 may also include... Figure 5 The more or fewer components shown, or having the same Figure 5 The different configurations shown.

[0106] The memory 04 can be used to store software programs and modules of application software, such as the program instructions / modules corresponding to the low-temperature control method in this embodiment. The processor 02 executes various functional applications and data processing by running the software programs and modules stored in the memory 04, thereby realizing the low-temperature control method of the aforementioned application. The memory 04 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 04 may further include memory remotely located relative to the processor 02, and these remote memories can be connected to the electronic device 10 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0107] The transmission module 06 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the electronic device 10. In one example, the transmission module 06 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission module 06 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0108] Example 5

[0109] This invention provides software for executing the technical solutions described in the above embodiments and preferred embodiments.

[0110] This invention provides a non-volatile computer storage medium storing computer-executable instructions that can execute the low-temperature control method in any of the above-described method embodiments.

[0111] The aforementioned storage medium stores the aforementioned software, and the storage medium includes, but is not limited to, optical discs, floppy disks, hard disks, and rewritable memory.

[0112] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0113] The electronic devices of this invention exist in various forms, including but not limited to:

[0114] (1) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0115] (2) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include PDAs, MIDs, and UMPCs, such as the iPad.

[0116] (3) Portable entertainment devices: These devices can display and play multimedia content. This category includes audio and video players (such as iPods), handheld game consoles, e-book readers, as well as smart toys and portable car navigation devices.

[0117] (4) Server, a device that provides computing services. The components of a server include processor, hard disk, memory, device bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability and manageability.

[0118] (5) Other electronic devices with data interaction functions, such as televisions and in-vehicle screens.

[0119] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0120] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cryogenic control method, characterized by, The method includes: The low-temperature cooling inlet temperature of the target air conditioning unit is obtained as the first temperature threshold, and the first temperature threshold is increased by a preset temperature value to obtain the second temperature threshold. Obtain the current outer ring temperature of the target air conditioning unit; When the current outer ring temperature is lower than the first temperature threshold, the target air conditioning unit is controlled to enter a low-temperature cooling speed regulation state. In the low-temperature cooling speed regulation state, the fan speed of the inner and outer fans of the target air conditioning unit is adjusted according to the rate of change of the outer ring temperature, the inner pipe temperature and the outer pipe temperature of the target air conditioning unit. If the current outer ring temperature is higher than the second temperature threshold, control the target air conditioning unit to exit the low-temperature cooling speed regulation state; The adjustment of the fan speeds of the target air conditioning unit's indoor and outdoor fans according to the rate of change of the outer ring temperature, the inner pipe temperature, and the outer pipe temperature includes: determining the temperature range to which the current outer ring temperature belongs when the indoor and outdoor fans of the target air conditioning unit are turned on; determining the initial fan speeds of the indoor and outdoor fans of the target air conditioning unit based on the temperature range; controlling the indoor and outdoor fans to operate at the initial fan speeds; and after a predetermined operating time, performing coordinated speed control of the fan speeds of the indoor and outdoor fans of the target air conditioning unit based on the rate of change of the inner pipe temperature and the outer pipe temperature of the target air conditioning unit. Specifically, based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit, the fan speed of the indoor and outdoor fans of the target air conditioning unit is adjusted in a coordinated manner. This includes: when the outer pipe temperature is greater than or equal to a first temperature and less than or equal to a second temperature, keeping the outdoor fan speed unchanged and continuously monitoring the inner pipe temperature; when the rate of change of the inner pipe temperature is greater than a preset first rate of change threshold, increasing the indoor fan speed by one level; when the outer pipe temperature is greater than the second temperature, increasing the outdoor fan speed by one level every predetermined time interval until the outer pipe temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The system continuously monitors the temperature of the outer duct. If the rate of change of the outer duct temperature exceeds a preset second rate of change threshold, the fan speed of the outer fan remains unchanged. The system also continuously monitors the temperature of the inner duct. If the rate of change of the inner duct temperature exceeds a preset first rate of change threshold, the fan speed of the inner fan is increased by one level. If the outer duct temperature is lower than the first temperature, the fan speed of the outer fan is decreased by one level every predetermined time interval until the outer duct temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The system also continuously monitors the temperature of the inner duct. If the rate of change of the inner duct temperature exceeds a preset first rate of change threshold, the fan speed of the inner fan is increased by one level.

2. The method of claim 1, wherein, The rate of change of the outer tube temperature is the rate of change of the condenser tube temperature, and the rate of change of the inner tube temperature is the rate of change of the evaporator tube temperature.

3. The method of claim 1, wherein, Based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit, the fan speed of the inner and outer fans of the target air conditioning unit is adjusted in a coordinated manner, including: Determine whether the outer ring temperature is lower than the third temperature threshold; If the outer ring temperature is lower than the third temperature threshold, determine the temperature range to which the outer ring temperature belongs; Determine the allowable airflow range for the external fan corresponding to the temperature range; During the process of adjusting the speed of the indoor and outdoor fans of the target air conditioning unit in conjunction with the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature, the outdoor fan is controlled to operate within the allowable fan speed range.

4. The method according to any one of claims 1 to 3, characterized in that, Also includes: When the target air conditioning unit is powered on for the first time, if the current ambient temperature is higher than or equal to the first temperature threshold but lower than the second temperature threshold, the outdoor fan of the target air conditioning unit is controlled to operate at the highest fan speed.

5. A cryogenic control device, characterized by, include: The first acquisition module is used to acquire the low-temperature cooling entry temperature of the target air conditioning unit as a first temperature threshold, and add a preset temperature value to the first temperature threshold as a second temperature threshold. The second acquisition module is used to acquire the current outer ring temperature of the target air conditioning unit; The first control module is used to control the target air conditioning unit to enter a low-temperature cooling speed regulation state when the current outer ring temperature is lower than the first temperature threshold. In the low-temperature cooling speed regulation state, the fan speed of the inner and outer fans of the target air conditioning unit is adjusted according to the rate of change of the outer ring temperature, the inner pipe temperature and the outer pipe temperature of the target air conditioning unit. The second control module is used to control the target air conditioning unit to exit the low-temperature cooling speed regulation state when the current outer ring temperature is higher than the second temperature threshold. The first control module includes: The first determining unit is used to determine the temperature range to which the current outer ring temperature belongs when the indoor and outdoor fans of the target air conditioning unit are turned on. The second determining unit is used to determine the initial fan speed of the indoor and outdoor fans of the target air conditioning unit according to the temperature range to which they belong; The control unit is used to control the indoor and outdoor fans to run according to the initial fan speed. After running for a predetermined time, the control unit performs linkage speed regulation control on the fan speed of the indoor and outdoor fans of the target air conditioning unit according to the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit. Specifically, based on the rate of change of the inner pipe temperature and the rate of change of the outer pipe temperature of the target air conditioning unit, the fan speed of the indoor and outdoor fans of the target air conditioning unit is adjusted in a coordinated manner. This includes: when the outer pipe temperature is greater than or equal to a first temperature and less than or equal to a second temperature, keeping the outdoor fan speed unchanged and continuously monitoring the inner pipe temperature; when the rate of change of the inner pipe temperature is greater than a preset first rate of change threshold, increasing the indoor fan speed by one level; when the outer pipe temperature is greater than the second temperature, increasing the outdoor fan speed by one level every predetermined time interval until the outer pipe temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The system continuously monitors the temperature of the outer duct. If the rate of change of the outer duct temperature exceeds a preset second rate of change threshold, the fan speed of the outer fan remains unchanged. The system also continuously monitors the temperature of the inner duct. If the rate of change of the inner duct temperature exceeds a preset first rate of change threshold, the fan speed of the inner fan is increased by one level. If the outer duct temperature is lower than the first temperature, the fan speed of the outer fan is decreased by one level every predetermined time interval until the outer duct temperature is greater than or equal to the first temperature and less than or equal to the second temperature. The system also continuously monitors the temperature of the inner duct. If the rate of change of the inner duct temperature exceeds a preset first rate of change threshold, the fan speed of the inner fan is increased by one level.

6. An air conditioning unit, comprising the low-temperature control device as described in claim 5.

7. A computer-readable storage medium having stored thereon a computer program, characterized in that When the program is executed by the processor, it implements the method as described in any one of claims 1 to 4.

8. An electronic device, comprising: include: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the method as described in any one of claims 1 to 4.

Images