Temperature control method and device, electronic equipment and storage medium

Abstract

The application relates to a temperature control method and device, electronic equipment and a storage medium. The method is applied to a refrigeration equipment. First and second capillary tubes with different lengths are arranged in parallel on a refrigerant flow path of the refrigeration equipment. The method comprises the following steps: acquiring a set storage temperature of the refrigeration equipment, a current storage temperature in the refrigeration equipment, and an ambient temperature of an environment in which the refrigeration equipment is located; and according to the set storage temperature, the current storage temperature and the ambient temperature, controlling a situation in which the first and second capillary tubes are connected to the refrigerant flow path, so that the current storage temperature reaches the set storage temperature. Thus, two capillary tubes are used instead of an electronic expansion valve as a throttling element, cost is reduced, and through reasonable connection of the two capillary tubes to the refrigerant flow path, the exhaust pressure and temperature of a compressor are reduced, and the compressor is prevented from being tripped.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, and in particular to a temperature control method, device, electronic device, and storage medium. Background Technology

[0002] With the advancement of modern life, people's pursuit of quality of life and comfort is constantly increasing, which has promoted the development of the smart home appliance field, leading to the gradual entry of refrigeration equipment such as refrigerators into people's lives. Refrigeration equipment such as refrigerators is primarily used for storing food. During the food storage process, the storage temperature of refrigeration equipment such as refrigerators can be controlled to achieve the purpose of preserving and keeping food fresh.

[0003] Currently, the refrigerant flow rate is adjusted by controlling the opening of the electronic expansion valve in the refrigerant flow path or the frequency of the inverter compressor, thereby controlling the storage temperature of refrigeration equipment such as refrigerators. However, electronic expansion valves are relatively expensive and their control is complex. In addition, inverter compressors can only adjust their speed within a set speed range. Under high heat loads in refrigeration equipment such as refrigerators, even if the inverter compressor starts running at its lowest speed, it may still cause high discharge pressure and temperature, or even cause the inverter compressor to trip. Summary of the Invention

[0004] To address the issues of the high cost and complex control of electronic expansion valves, and the fact that variable frequency compressors can only adjust their speed within a set range, even when starting at the lowest speed in refrigeration equipment like refrigerators under heavy heat loads, this application provides a temperature control method, device, electronic equipment, and storage medium. The specific technical solution is as follows:

[0005] In a first aspect, this application provides a temperature control method applied to a refrigeration device, wherein a first capillary tube and a second capillary tube of unequal length are arranged in parallel on the refrigerant flow path of the refrigeration device, and the method includes:

[0006] The set storage temperature of the refrigeration device and the current storage temperature inside the refrigeration device are obtained, as well as the ambient temperature of the environment in which the refrigeration device is located.

[0007] Based on the set storage temperature, the current storage temperature, and the ambient temperature, the connection of the first capillary and the second capillary to the refrigerant flow path is controlled so that the current storage temperature reaches the set storage temperature.

[0008] In one optional embodiment, the refrigerant flow path is provided with a compressor, a condenser, a filter, a two-position three-way solenoid valve, a first capillary tube, a second capillary tube, and an evaporator in sequence according to the refrigerant flow direction;

[0009] One end of the compressor is connected to one end of the condenser, the other end of the condenser is connected to one end of the filter, and the other end of the filter is connected to the first end of the two-position three-way solenoid valve.

[0010] The second end of the two-position three-way solenoid valve is connected to one end of the first capillary tube, the other end of the first capillary tube is connected to one end of the evaporator, the third end of the two-position three-way solenoid valve is connected to one end of the second capillary tube, the other end of the second capillary tube is connected to one end of the evaporator, and the other end of the evaporator is connected to the other end of the compressor.

[0011] In one optional implementation, the length of the first capillary is greater than the length of the second capillary;

[0012] The step of controlling the connection of the first capillary and the second capillary to the refrigerant flow path based on the set storage temperature, the current storage temperature, and the ambient temperature, so that the current storage temperature reaches the set storage temperature, includes:

[0013] If the set storage temperature is lower than a preset first temperature threshold, determine whether the current storage temperature and the ambient temperature meet the preset temperature requirements;

[0014] If the current storage temperature and the ambient temperature meet the preset temperature requirements, control the second capillary tube to be connected to the refrigerant flow path;

[0015] According to the preset first control strategy for the compressor, the compressor is controlled to operate, and it is determined whether the current storage temperature has dropped to a preset second temperature threshold.

[0016] When the current storage temperature drops to the preset second temperature threshold, the first capillary tube is connected to the refrigerant flow path.

[0017] According to the preset second compressor control strategy, the compressor is controlled to operate so that the current storage temperature reaches the set storage temperature.

[0018] In an optional implementation, the step of determining whether the current storage temperature and the ambient temperature meet the preset temperature requirement when the set storage temperature is lower than a preset first temperature threshold includes:

[0019] If the set storage temperature is less than a preset first temperature threshold, determine whether the current storage temperature is greater than a preset third temperature threshold, and determine whether the ambient temperature is greater than a preset fourth temperature threshold.

[0020] When the current storage temperature and the ambient temperature meet the preset temperature requirements, controlling the second capillary tube to connect to the refrigerant flow path includes:

[0021] When the current storage temperature is greater than the preset third temperature threshold and the ambient temperature is greater than the preset fourth temperature threshold, the second capillary is controlled to connect to the refrigerant flow path.

[0022] In an optional implementation, controlling the connection of the second capillary to the refrigerant flow path includes:

[0023] The two-position three-way solenoid valve is energized to control the second capillary tube to connect to the refrigerant flow path;

[0024] The control of the first capillary tube to connect to the refrigerant flow path includes:

[0025] The two-position three-way solenoid valve is de-energized to control the first capillary tube to connect to the refrigerant flow path.

[0026] In an optional implementation, controlling the compressor to operate according to a preset first compressor control strategy includes:

[0027] The compressor is controlled to start at the lowest frequency and then controlled to run at the maximum frequency according to the first frequency ramp-up.

[0028] In an optional implementation, controlling the compressor to operate according to a preset second compressor control strategy includes:

[0029] The compressor is controlled to reduce its frequency to the lowest frequency and operate at the lowest frequency, and the compressor is also controlled to increase its frequency to the maximum frequency according to the second frequency increase.

[0030] In an optional implementation, the method further includes:

[0031] If the current storage temperature and the ambient temperature do not meet the preset temperature requirements, the first capillary tube is controlled to be connected to the refrigerant flow path;

[0032] According to the preset third control strategy for the compressor, the compressor is controlled to operate so that the current storage temperature reaches the set storage temperature.

[0033] In an optional implementation, controlling the first capillary tube to connect to the refrigerant flow path when the current storage temperature and the ambient temperature do not meet the preset temperature requirement includes:

[0034] If the current storage temperature is not greater than a preset third temperature threshold, and / or the ambient temperature is not greater than a preset fourth temperature threshold, the first capillary is controlled to connect to the refrigerant flow path.

[0035] In an optional implementation, controlling the first capillary tube to connect to the refrigerant flow path includes:

[0036] Keep the two-position three-way solenoid valve de-energized to control the first capillary tube to connect to the refrigerant flow path.

[0037] In an optional implementation, controlling the compressor to operate according to a preset third compressor control strategy includes:

[0038] The compressor is controlled to start at the lowest frequency and then controlled to run at the maximum frequency according to the third frequency ramp-up.

[0039] In an optional implementation, the method further includes:

[0040] If the set storage temperature is not lower than the preset first temperature threshold, control the second capillary to be connected to the refrigerant flow path;

[0041] According to the preset compressor fourth control strategy, the compressor is controlled to operate so that the current storage temperature reaches the set storage temperature.

[0042] In an optional implementation, controlling the connection of the second capillary to the refrigerant flow path includes:

[0043] The two-position three-way solenoid valve is energized to control the second capillary tube to connect to the refrigerant flow path.

[0044] In an optional implementation, controlling the compressor to operate according to a preset fourth compressor control strategy includes:

[0045] The compressor is controlled to start at the lowest frequency and then controlled to run at the fourth frequency ramp-up to the maximum frequency.

[0046] Secondly, this application provides a temperature control device applied to a refrigeration equipment, wherein a first capillary tube and a second capillary tube of unequal length are arranged in parallel on the refrigerant flow path of the refrigeration equipment, and the device includes:

[0047] The temperature acquisition module is used to acquire the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment in which the refrigeration equipment is located.

[0048] The capillary control module is used to control the connection of the first capillary and the second capillary to the refrigerant flow path according to the set storage temperature, the current storage temperature and the ambient temperature, so that the current storage temperature reaches the set storage temperature.

[0049] Thirdly, an electronic device is also provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0050] Memory, used to store computer programs;

[0051] When a processor executes a program stored in memory, it implements any of the temperature control methods described in the first aspect above.

[0052] Fourthly, a storage medium is also provided, wherein the storage medium stores instructions that, when executed on a computer, cause the computer to perform any of the temperature control methods described in the first aspect above.

[0053] Fifthly, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute any of the temperature control methods described above.

[0054] Compared with the prior art, the above-mentioned technical solution provided in this application embodiment has the following advantages: The method provided in this application embodiment is applied to a refrigeration device. A first capillary tube and a second capillary tube of unequal length are arranged in parallel on the refrigerant flow path of the refrigeration device. The set storage temperature of the refrigeration device and the current storage temperature inside the refrigeration device are obtained, and the ambient temperature of the environment in which the refrigeration device is located is obtained. Based on the set storage temperature, the current storage temperature and the ambient temperature, the connection of the first capillary tube and the second capillary tube to the refrigerant flow path is controlled so that the current storage temperature reaches the set storage temperature.

[0055] By acquiring the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment where the refrigeration equipment is located, the connection of the first and second capillary tubes arranged in parallel on the refrigerant flow path of the refrigeration equipment is controlled according to the set storage temperature, the current storage temperature, and the ambient temperature, so that the current storage temperature reaches the set storage temperature. In this way, two capillary tubes are used instead of an electronic expansion valve as a throttling element, which reduces costs. Moreover, by reasonably connecting the two capillary tubes in parallel to the refrigerant flow path, the discharge pressure and temperature of the compressor are reduced, avoiding compressor shutdown. Attached Figure Description

[0056] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0057] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0059] Figure 1 A schematic diagram of a refrigeration system provided in an embodiment of this application;

[0060] Figure 2 A schematic diagram illustrating the implementation process of a temperature control method provided in this application embodiment;

[0061] Figure 3 A schematic diagram illustrating the implementation process of another temperature control method provided in this application embodiment;

[0062] Figure 4 This is a schematic diagram of the structure of a temperature control device provided in an embodiment of this application;

[0063] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0066] like Figure 1The diagram shown is a schematic representation of a refrigeration system according to an embodiment of this application, where the arrows indicate the direction of refrigerant flow. This refrigeration system is applied to refrigeration equipment. Along the refrigerant flow path, a compressor A, a condenser C, a filter D, a two-position three-way solenoid valve V, a first capillary tube J1, a second capillary tube J2, and an evaporator E are arranged in sequence according to the refrigerant flow direction. The two-position three-way solenoid valve V and the evaporator E are connected side-by-side by first capillary tubes J1 and second capillary tubes J2 of unequal length.

[0067] One end of compressor A is connected to one end of condenser C, the other end of condenser C is connected to one end of filter D, and the other end of filter D is connected to the first end of two-position three-way solenoid valve V; the second end of two-position three-way solenoid valve V is connected to one end of first capillary tube J1, the other end of first capillary tube J1 is connected to one end of evaporator E, the third end of two-position three-way solenoid valve V is connected to one end of second capillary tube J2, the other end of second capillary tube J2 is connected to one end of evaporator E, and the other end of evaporator E is connected to the other end of compressor A.

[0068] Specifically, the length of the first capillary tube J1 needs to be sufficient to ensure the compressor reaches its lowest possible temperature under full-frequency operation, while the length of the second capillary tube J2 needs to be sufficient to ensure the compressor reaches the temperature of the first capillary tube J1 under its lowest operating frequency under full-frequency operation. By switching between the first capillary tube J1 and the second capillary tube J2, the refrigeration temperature range can be extended to a wider range. The length of the first capillary tube J1 is greater than the length of the second capillary tube J2.

[0069] For example, when the first capillary tube J1 is connected to the refrigerant flow path, the refrigeration equipment can reach temperatures of T1 and T2 when the compressor is running at low frequency and full frequency, respectively, i.e., the temperature range is T1 to T2, preferably T1 to T2 = 0 to -40℃. When the second capillary tube J2 is connected to the refrigerant flow path, the refrigeration equipment can reach temperatures of T3 and T4 when the compressor is running at low frequency and full frequency, respectively, i.e., the temperature range is T3 to T4, preferably T3 to T4 = 10 to -5℃. Thus, by switching between the first capillary tube J1 and the second capillary tube J2, the refrigeration temperature range can be extended to a wider range.

[0070] It should be noted that, for the first capillary tube J1 and the second capillary tube J2, at any given time, only one capillary tube can be connected to the refrigerant flow path, while the other capillary tube remains idle. For the two-position three-way solenoid valve V, when the two-position three-way solenoid valve V is energized, the second capillary tube J2 is connected to the refrigerant flow path; when the two-position three-way solenoid valve V is de-energized, the first capillary tube J1 is connected to the refrigerant flow path.

[0071] Based on such Figure 1 The schematic diagram of the refrigeration system shown is as follows: Figure 2As shown, this application provides a temperature control method, which may specifically include the following steps:

[0072] S201, obtain the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment in which the refrigeration equipment is located.

[0073] In this embodiment, for the refrigeration device, powering on means that cooling and temperature control need to begin. This allows us to obtain the set storage temperature of the refrigeration device and the current internal storage temperature. Furthermore, it is also necessary to obtain the ambient temperature of the environment in which the refrigeration device is located.

[0074] For example, when a refrigerator is powered on and begins cooling, it's necessary to obtain the refrigerator's set storage temperature and the current internal storage temperature. Additionally, the ambient temperature of the environment in which the cooling system is located also needs to be obtained.

[0075] It should be noted that the storage temperature set for the refrigeration equipment can be a storage temperature set by the user or a storage temperature determined based on the food stored inside the refrigeration equipment. This application embodiment does not limit this.

[0076] S202, based on the set storage temperature, the current storage temperature and the ambient temperature, controls the connection of the first capillary tube and the second capillary tube to the refrigerant flow path so that the current storage temperature reaches the set storage temperature.

[0077] In this embodiment of the application, the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment where the refrigeration equipment is located can be used to control the connection of the first capillary tube and the second capillary tube to the refrigerant flow path so that the current storage temperature reaches the set storage temperature.

[0078] It should be noted that, for refrigeration equipment, the use of the first and second capillary tubes is determined based on the set storage temperature, the current storage temperature, and the ambient temperature. In other words, the connection of the first and second capillary tubes to the refrigerant flow path is determined to achieve cooling and bring the current storage temperature to the set storage temperature.

[0079] The refrigeration equipment determines how the first and second capillary tubes connect to the refrigerant flow path based on the set storage temperature, the current storage temperature, and the ambient temperature. This achieves cooling, bringing the current storage temperature up to the set storage temperature. This reduces the compressor's discharge pressure and temperature, preventing compressor shutdown, and allows for the use of two capillary tubes instead of an electronic expansion valve as a throttling element, lowering costs. Furthermore, the use of dual capillary tubes expands the refrigeration temperature range, meeting refrigeration demands.

[0080] Based on the above description of the technical solution provided in the embodiments of this application, the set storage temperature of the refrigeration equipment and the current storage temperature inside the refrigeration equipment are obtained, and the ambient temperature of the environment in which the refrigeration equipment is located is obtained. According to the set storage temperature, the current storage temperature and the ambient temperature, the connection of the first capillary tube and the second capillary tube to the refrigerant flow path is controlled so that the current storage temperature reaches the set storage temperature.

[0081] By acquiring the set storage temperature of the refrigeration equipment, the current storage temperature inside the equipment, and the ambient temperature of the environment surrounding the equipment, the system controls the connection of the first and second capillary tubes, which are arranged in parallel on the refrigerant flow path, to the refrigerant flow path. This ensures that the current storage temperature reaches the set storage temperature. By using two capillary tubes instead of an electronic expansion valve as a throttling element, costs are reduced. Furthermore, the proper connection of the two parallel capillary tubes to the refrigerant flow path lowers the compressor's discharge pressure and temperature, preventing compressor shutdown. In addition, the use of dual capillary tubes expands the refrigeration temperature range, meeting refrigeration demands.

[0082] like Figure 3 As shown, another temperature control method provided in this application embodiment may specifically include the following steps:

[0083] S301, obtain the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment in which the refrigeration equipment is located.

[0084] In this embodiment of the application, this step is similar to step S201 above, and will not be described in detail here.

[0085] S302, when the set storage temperature is lower than the preset first temperature threshold, determine whether the current storage temperature and ambient temperature meet the preset temperature requirements.

[0086] S303, when the current storage temperature and ambient temperature meet the preset temperature requirements, controls the second capillary tube to connect to the refrigerant flow path.

[0087] In this embodiment of the application, if the set storage temperature of the refrigeration device is lower than the preset first temperature threshold, it indicates that the set storage temperature of the refrigeration device is low. At this time, it is determined whether the current storage temperature inside the refrigeration device and the ambient temperature of the environment where the refrigeration device is located meet the preset temperature requirements. If the current storage temperature and the ambient temperature meet the preset temperature requirements, the second capillary tube is controlled to be connected to the refrigerant flow path.

[0088] Specifically, when the storage temperature is set to be lower than a preset first temperature threshold, it is determined whether the current storage temperature is higher than a preset third temperature threshold and whether the ambient temperature is higher than a preset fourth temperature threshold. If the current storage temperature is higher than the preset third temperature threshold and the ambient temperature is higher than the preset fourth temperature threshold, the second capillary tube is controlled to connect to the refrigerant flow path.

[0089] For example, when the storage temperature Ts is set to be less than -2.5℃, it can be determined whether the current storage temperature Td is greater than 25℃ and whether the ambient temperature Ta is greater than 25℃. If both the current storage temperature Td and the ambient temperature Ta are greater than 25℃, the second capillary J2 is controlled to connect to the refrigerant flow path. Specifically, the preset first temperature threshold can be selected as the average of the left boundary value of the controllable temperature zone of the first capillary J1 and the right boundary value of the controllable temperature zone of the second capillary J2.

[0090] It should be noted that when the set storage temperature is lower than the preset first temperature threshold, the current storage temperature is higher than the preset third temperature threshold, and the ambient temperature is higher than the preset fourth temperature threshold, it indicates a high heat load requiring a large cooling capacity. If the first capillary tube (the longer capillary tube) is used directly for throttling in this situation, the compressor's discharge pressure and temperature will be high, potentially causing the compressor to trip. To avoid this, the second capillary tube (the shorter capillary tube) can be used for pre-cooling before switching to the longer capillary tube for throttling. This will reduce the compressor's discharge pressure and temperature, ensuring normal compressor startup.

[0091] Among them, the two-position three-way solenoid valve can be energized, which can realize the refrigerant flow into the second capillary tube. At this time, the refrigerant can be throttled using the second capillary tube, which facilitates pre-cooling.

[0092] S304 controls the compressor to run according to the preset first compressor control strategy and determines whether the current storage temperature has dropped to the preset second temperature threshold.

[0093] In this embodiment, after the second capillary tube is connected to the refrigerant flow path, the compressor can be controlled to operate according to a preset first compressor control strategy. The compressor, for example, can be a variable frequency compressor, which can start at the lowest frequency and then quickly rise to the highest frequency for full-frequency operation.

[0094] Based on this, the compressor can be controlled to start at the lowest frequency, and then run at the maximum frequency by increasing the frequency at a first increment. For example, the compressor can be controlled to start at 33Hz, and then run at the maximum frequency of 75Hz by increasing the frequency at a rate of 1Hz / 5s.

[0095] It should be noted that during the compressor's full-frequency operation, the current storage temperature inside the refrigeration equipment will decrease. Therefore, after the compressor has been running at full frequency for a period of time, it can be determined whether the current storage temperature has dropped to a preset second temperature threshold. For example, it can be determined whether the current storage temperature has dropped to T0, where T0 is greater than T1, preferably T0 = 10℃.

[0096] S305, when the current storage temperature drops to a preset second temperature threshold, controls the first capillary tube to connect to the refrigerant flow path.

[0097] In this embodiment of the application, when the current storage temperature inside the refrigeration equipment drops to a preset second temperature threshold, it indicates that the precooling through the second capillary tube has ended, and at this time the first capillary tube can be controlled to connect to the refrigerant flow path.

[0098] Specifically, the first capillary tube can be de-energized by controlling the two-position three-way solenoid valve, thereby controlling the first capillary tube to connect to the refrigerant flow path. This allows the first capillary tube to throttle the refrigerant and perform deep cooling, enabling the current storage temperature to reach the set storage temperature as quickly as possible.

[0099] S306 controls the compressor to operate according to the preset second compressor control strategy so that the current storage temperature reaches the set storage temperature.

[0100] In this embodiment, after the first capillary tube is connected to the refrigerant flow path, the compressor can be controlled to operate according to a preset second compressor control strategy to bring the current storage temperature to the set storage temperature. Specifically, the compressor can operate at its lowest frequency and then gradually increase to full frequency using a specific ramp-up frequency.

[0101] Based on this, the compressor control can specifically involve controlling the compressor to reduce its frequency to the lowest possible frequency, operating at that lowest frequency, and then controlling the compressor to increase its frequency to the maximum frequency at a second frequency increase. For example, the compressor can be controlled to reduce its frequency to 33Hz, operating at that frequency, and then increased to the maximum frequency of 75Hz at a frequency increase of 1Hz / 3min.

[0102] Furthermore, when the current storage temperature reaches the set storage temperature, the compressor is stopped, entering a start-stop cycle. When the current storage temperature rises back to a certain temperature (e.g., Ts+T), and the cooling requirements are not met, the compressor is started and operates at the target frequency. When the current storage temperature reaches the set storage temperature, the compressor is stopped, and this cycle repeats. The target frequency is the compressor operating frequency at which the refrigeration equipment can lower the current storage temperature to the set storage temperature within a certain time period.

[0103] S307: If the current storage temperature and ambient temperature do not meet the preset temperature requirements, control the first capillary tube to connect to the refrigerant flow path.

[0104] In this embodiment of the application, if the set storage temperature of the refrigeration device is lower than the preset first temperature threshold, it indicates that the set storage temperature of the refrigeration device is low. At this time, it is determined whether the current storage temperature inside the refrigeration device and the ambient temperature of the environment where the refrigeration device is located meet the preset temperature requirements. If the current storage temperature and the ambient temperature do not meet the preset temperature requirements, the first capillary tube is controlled to be connected to the refrigerant flow path.

[0105] Specifically, when the storage temperature is set to be less than a preset first temperature threshold, it is determined whether the current storage temperature is greater than a preset third temperature threshold and whether the ambient temperature is greater than a preset fourth temperature threshold. If the current storage temperature is not greater than the preset third temperature threshold and / or the ambient temperature is not greater than the preset fourth temperature threshold, the first capillary tube is controlled to connect to the refrigerant flow path.

[0106] For example, if the storage temperature Ts is set to be less than -2.5℃, it can be determined whether the current storage temperature Td is greater than 25℃ and whether the ambient temperature Ta is greater than 25℃. If the current storage temperature Td and / or the ambient temperature Ta are not greater than 25℃, the first capillary tube is controlled to be connected to the refrigerant flow path.

[0107] It should be noted that when the set storage temperature is lower than the preset first temperature threshold, and the current storage temperature is not higher than the preset third temperature threshold, and / or the ambient temperature is not higher than the preset fourth temperature threshold, it means that the heat load is small and a small amount of cooling capacity is required. The first capillary tube can be used directly for throttling. At this time, the compressor's discharge pressure and temperature will not be too high, which can ensure that the compressor starts normally.

[0108] Among them, the two-position three-way solenoid valve can be kept de-energized, so that the first capillary tube can be connected to the refrigerant flow path. At this time, the first capillary tube can be used to throttle the refrigerant and cool it down, so that the current storage temperature can reach the set storage temperature as soon as possible.

[0109] S308 controls the compressor to operate according to the preset third compressor control strategy, so that the current storage temperature reaches the set storage temperature.

[0110] In this embodiment, after the first capillary tube is connected to the refrigerant flow path, the compressor can be controlled to operate according to a preset third compressor control strategy to bring the current storage temperature to the set storage temperature. Specifically, the compressor can be started at the lowest frequency and then increased to full frequency at a specific ramp-up frequency.

[0111] Based on this, the compressor can be controlled to start at the lowest frequency and then run at a third frequency ramp-up to the maximum frequency. For example, the compressor can be controlled to start at 33Hz and then run at a ramp-up frequency of 1Hz / 1min to the maximum frequency of 75Hz.

[0112] Furthermore, when the current storage temperature reaches the set storage temperature, the compressor is stopped, entering a start-stop cycle. When the current storage temperature rises back to a certain temperature (e.g., Ts+T), and the cooling requirements are not met, the compressor is started and operates at the target frequency. When the current storage temperature reaches the set storage temperature, the compressor is stopped, and this cycle repeats. The target frequency is the compressor operating frequency at which the refrigeration equipment can lower the current storage temperature to the set storage temperature within a certain time period.

[0113] S309, when the set storage temperature is not lower than the preset first temperature threshold, control the second capillary tube to be connected to the refrigerant flow path.

[0114] In this embodiment, if the set storage temperature is not lower than the preset first temperature threshold, it indicates that the set storage temperature is too high. In this case, the second capillary can be used directly to reduce the current storage temperature to the set storage temperature, thereby controlling the second capillary to connect to the refrigerant flow path.

[0115] One method is to control the energization of a two-position three-way solenoid valve, which in turn controls the connection of the second capillary tube to the refrigerant flow path. This allows the refrigerant to be throttled and cooled down using the second capillary tube, thus enabling the current storage temperature to reach the set storage temperature as quickly as possible.

[0116] S310 controls the compressor to operate according to the preset fourth compressor control strategy so that the current storage temperature reaches the set storage temperature.

[0117] In this embodiment, after the second capillary tube is connected to the refrigerant flow path, the compressor can be controlled to operate according to a preset fourth compressor control strategy to bring the current storage temperature to the set storage temperature. Specifically, the compressor can be started at the lowest frequency and then gradually increased to full frequency.

[0118] Based on this, the compressor can be controlled to start at the lowest frequency, and then run at the maximum frequency by increasing the frequency at the fourth ramp-up frequency. For example, the compressor can be controlled to start at a frequency of 33Hz, and then run at the maximum frequency of 75Hz by increasing the frequency at a ramp-up frequency of 1Hz / 1min.

[0119] Furthermore, when the current storage temperature reaches the set storage temperature, the compressor is stopped, entering a start-stop cycle. When the current storage temperature rises back to a certain temperature (e.g., Ts+T), and the cooling requirements are not met, the compressor is started and operates at the target frequency. When the current storage temperature reaches the set storage temperature, the compressor is stopped, and this cycle repeats. The target frequency is the compressor operating frequency at which the refrigeration equipment can lower the current storage temperature to the set storage temperature within a certain time period.

[0120] By acquiring the set storage temperature of the refrigeration equipment, the current storage temperature inside the equipment, and the ambient temperature of the environment surrounding the equipment, the system controls the connection of the first and second capillary tubes, which are arranged in parallel on the refrigerant flow path, to the refrigerant flow path. This ensures that the current storage temperature reaches the set storage temperature. By using two capillary tubes instead of an electronic expansion valve as a throttling element, costs are reduced. Furthermore, the proper connection of the two parallel capillary tubes to the refrigerant flow path lowers the compressor's discharge pressure and temperature, preventing compressor shutdown. In addition, the use of dual capillary tubes expands the refrigeration temperature range, meeting refrigeration demands.

[0121] Corresponding to the above method embodiments, this application also provides a temperature control device, such as... Figure 4 As shown, the device may include: a temperature acquisition module 410 and a capillary control module 420.

[0122] The temperature acquisition module 410 is used to acquire the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment in which the refrigeration equipment is located.

[0123] The capillary control module 420 is used to control the connection of the first capillary and the second capillary to the refrigerant flow path according to the set storage temperature, the current storage temperature and the ambient temperature, so that the current storage temperature reaches the set storage temperature.

[0124] This application also provides an electronic device, such as... Figure 5 As shown, it includes a processor 51, a communication interface 52, a memory 53, and a communication bus 54. The processor 51, the communication interface 52, and the memory 53 communicate with each other through the communication bus 54.

[0125] Memory 53 is used to store computer programs;

[0126] When processor 51 executes the program stored in memory 53, it performs the following steps:

[0127] The system obtains the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment in which the refrigeration equipment is located; based on the set storage temperature, the current storage temperature, and the ambient temperature, it controls the connection of the first capillary tube and the second capillary tube to the refrigerant flow path so that the current storage temperature reaches the set storage temperature.

[0128] The communication bus mentioned in the above electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0129] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0130] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0131] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0132] In another embodiment provided in this application, a storage medium is also provided, which stores instructions that, when run on a computer, cause the computer to execute any of the temperature control methods described in the above embodiments.

[0133] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute any of the temperature control methods described in the above embodiments.

[0134] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0135] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0136] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0137] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A temperature control method, characterized in that, The method is applied to refrigeration equipment, wherein a first capillary tube and a second capillary tube of unequal length are arranged in parallel on the refrigerant flow path of the refrigeration equipment, and a compressor, a condenser, a filter, a two-position three-way solenoid valve, the first capillary tube, the second capillary tube, and an evaporator are arranged sequentially according to the refrigerant flow direction on the refrigerant flow path. The set storage temperature of the refrigeration device and the current storage temperature inside the refrigeration device are obtained, as well as the ambient temperature of the environment in which the refrigeration device is located. Based on the set storage temperature, the current storage temperature, and the ambient temperature, controlling the connection of the first capillary tube and the second capillary tube to the refrigerant flow path to ensure that the current storage temperature reaches the set storage temperature includes: if the set storage temperature is lower than a preset first temperature threshold, determining whether the current storage temperature and the ambient temperature meet a preset temperature requirement; if the current storage temperature and the ambient temperature meet the preset temperature requirement, controlling the second capillary tube to connect to the refrigerant flow path; controlling the compressor to operate according to a preset first compressor control strategy, and determining whether the current storage temperature drops to a preset second temperature threshold; if the current storage temperature drops to the preset second temperature threshold, controlling the first capillary tube to connect to the refrigerant flow path; and controlling the compressor to operate according to a preset second compressor control strategy to ensure that the current storage temperature reaches the set storage temperature. The step of determining whether the current storage temperature and the ambient temperature meet the preset temperature requirements when the set storage temperature is less than the preset first temperature threshold includes: determining whether the current storage temperature is greater than the preset third temperature threshold and determining whether the ambient temperature is greater than the preset fourth temperature threshold when the set storage temperature is less than the preset first temperature threshold. The step of controlling the second capillary tube to connect to the refrigerant flow path when the current storage temperature and the ambient temperature meet the preset temperature requirements includes: controlling the second capillary tube to connect to the refrigerant flow path when the current storage temperature is greater than the preset third temperature threshold and the ambient temperature is greater than the preset fourth temperature threshold.

2. The method according to claim 1, characterized in that, One end of the compressor is connected to one end of the condenser, the other end of the condenser is connected to one end of the filter, and the other end of the filter is connected to the first end of the two-position three-way solenoid valve. The second end of the two-position three-way solenoid valve is connected to one end of the first capillary tube, the other end of the first capillary tube is connected to one end of the evaporator, the third end of the two-position three-way solenoid valve is connected to one end of the second capillary tube, the other end of the second capillary tube is connected to one end of the evaporator, and the other end of the evaporator is connected to the other end of the compressor.

3. The method according to claim 2, characterized in that, The length of the first capillary is greater than the length of the second capillary.

4. The method according to claim 3 or 1, characterized in that, The control of the second capillary tube connecting to the refrigerant flow path includes: The two-position three-way solenoid valve is energized to control the second capillary tube to connect to the refrigerant flow path; The control of the first capillary tube to connect to the refrigerant flow path includes: The two-position three-way solenoid valve is de-energized to control the first capillary tube to connect to the refrigerant flow path.

5. The method according to claim 3, characterized in that, The step of controlling the compressor to operate according to a preset first compressor control strategy includes: The compressor is controlled to start at the lowest frequency and then controlled to run at the maximum frequency according to the first frequency ramp-up.

6. The method according to claim 3, characterized in that, The step of controlling the compressor to operate according to a preset second compressor control strategy includes: The compressor is controlled to reduce its frequency to the lowest frequency and operate at the lowest frequency, and the compressor is also controlled to increase its frequency to the maximum frequency according to the second frequency increase.

7. The method according to claim 3, characterized in that, The method further includes: If the current storage temperature and the ambient temperature do not meet the preset temperature requirements, the first capillary tube is controlled to be connected to the refrigerant flow path; According to the preset third control strategy for the compressor, the compressor is controlled to operate so that the current storage temperature reaches the set storage temperature.

8. The method according to claim 7, characterized in that, When the current storage temperature and the ambient temperature do not meet the preset temperature requirement, controlling the first capillary tube to connect to the refrigerant flow path includes: If the current storage temperature is not greater than a preset third temperature threshold, and / or the ambient temperature is not greater than a preset fourth temperature threshold, the first capillary is controlled to connect to the refrigerant flow path.

9. The method according to claim 7 or 8, characterized in that, The control of the first capillary tube to connect to the refrigerant flow path includes: Keep the two-position three-way solenoid valve de-energized to control the first capillary tube to connect to the refrigerant flow path.

10. The method according to claim 7, characterized in that, The step of controlling the compressor to operate according to a preset third compressor control strategy includes: The compressor is controlled to start at the lowest frequency and then controlled to run at the maximum frequency according to the third frequency ramp-up.

11. The method according to claim 3, characterized in that, The method further includes: If the set storage temperature is not lower than the preset first temperature threshold, control the second capillary to be connected to the refrigerant flow path; According to the preset compressor fourth control strategy, the compressor is controlled to operate so that the current storage temperature reaches the set storage temperature.

12. The method according to claim 11, characterized in that, The control of the second capillary tube connecting to the refrigerant flow path includes: The two-position three-way solenoid valve is energized to control the second capillary tube to connect to the refrigerant flow path.

13. The method according to claim 11, characterized in that, The step of controlling the compressor to operate according to a preset fourth compressor control strategy includes: The compressor is controlled to start at the lowest frequency and then controlled to run at the fourth frequency ramp-up to the maximum frequency.

14. A temperature control device, characterized in that, This device is applied to refrigeration equipment, wherein a first capillary tube and a second capillary tube of unequal length are arranged in parallel on the refrigerant flow path, and a compressor, a condenser, a filter, a two-position three-way solenoid valve, the first capillary tube, the second capillary tube, and an evaporator are arranged sequentially according to the refrigerant flow direction on the refrigerant flow path. The device includes: The temperature acquisition module is used to acquire the set storage temperature of the refrigeration equipment, the current storage temperature inside the refrigeration equipment, and the ambient temperature of the environment in which the refrigeration equipment is located. A capillary control module is used to control the connection of the first capillary and the second capillary to the refrigerant flow path based on the set storage temperature, the current storage temperature, and the ambient temperature, so that the current storage temperature reaches the set storage temperature. This includes: if the set storage temperature is less than a preset first temperature threshold, determining whether the current storage temperature and the ambient temperature meet a preset temperature requirement; if the current storage temperature and the ambient temperature meet the preset temperature requirement, controlling the second capillary to connect to the refrigerant flow path; controlling the compressor to operate according to a preset first compressor control strategy, and determining whether the current storage temperature drops to a preset second temperature threshold; if the current storage temperature drops to the preset second temperature threshold, controlling the first capillary to connect to the refrigerant flow path; and controlling the compressor to operate according to a preset second compressor control strategy, so that the current storage temperature reaches the set storage temperature. The step of determining whether the current storage temperature and the ambient temperature meet the preset temperature requirements when the set storage temperature is less than the preset first temperature threshold includes: determining whether the current storage temperature is greater than the preset third temperature threshold and determining whether the ambient temperature is greater than the preset fourth temperature threshold when the set storage temperature is less than the preset first temperature threshold. The step of controlling the second capillary tube to connect to the refrigerant flow path when the current storage temperature and the ambient temperature meet the preset temperature requirements includes: controlling the second capillary tube to connect to the refrigerant flow path when the current storage temperature is greater than the preset third temperature threshold and the ambient temperature is greater than the preset fourth temperature threshold.

15. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the method described in any one of claims 1-13.

16. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1-13.

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