Non-stop frequency conversion refrigerator control system

Abstract

The invention provides a non-stop frequency conversion refrigerator control system which comprises a refrigerator temperature obtaining module, the refrigerator temperature obtaining module is arranged in a refrigerator chamber, and the refrigerator temperature obtaining module is configured to obtain the real-time temperature difference value of the chamber real-time temperature and the chamber set temperature; the chamber real-time temperature is the temperature of the environment where the refrigerator chamber is located, and the chamber set temperature is the required temperature of the refrigerator chamber; the instruction generation module is configured to generate a compressor control instruction according to the real-time temperature difference value and the temperature difference interval; the compressor control instruction is used for driving the compressor to operate according to a first rotating speed scheme or a second rotating speed scheme, the first rotating speed scheme comprises a plurality of sub-schemes with fixed rotating speeds and different values, and the second rotating speed scheme comprises a scheme for adaptively adjusting the rotating speed. According to the scheme, the problem that a compressor of an existing frequency conversion refrigerator is often shut down due to temperature change in the refrigerator is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerator control, and particularly to a variable-frequency refrigerator control system without shutdown. Background Art

[0002] In the household appliance field, the continuous improvement of energy efficiency standards has become a significant trend globally. Against this background, variable-frequency technology has been widely applied and promoted in household refrigeration equipment, especially refrigerator products, due to its significant energy-saving advantages. Currently, variable-frequency refrigerators have surpassed traditional fixed-frequency refrigerators in terms of market share and become the mainstream products in the market, which fully reflects the importance attached by consumers and the industry to energy conservation and environmental protection.

[0003] The refrigeration control logic commonly adopted by current variable-frequency refrigerators is relatively basic. Its core principle relies on monitoring the real-time temperature of each compartment of the refrigerator: when the temperature of a certain compartment is detected to be higher than the preset start-up point temperature, the control system will start the compressor to start refrigeration operation; conversely, when the temperature of this compartment drops below the preset shutdown point temperature, the control system will instruct the compressor to stop working. Although this control logic based on two-point temperature thresholds is relatively simple to implement, it has some inherent technical defects that have important impacts on the performance of the refrigerator and the user experience. The key limitation is that there is a non-zero temperature difference between the start-up point temperature and the shutdown point temperature, that is, there is a preset temperature difference operation range. This temperature difference range usually needs to maintain a certain amplitude to ensure the stability of the system operation and the feasibility of logic execution. However, it is precisely this necessary temperature difference range that leads to a significant problem: when the compartment temperature fluctuates within this relatively narrow temperature difference range, the compressor (and possibly associated components such as fans) of the refrigerator will frequently start and stop running. This frequent start-stop switching behavior will directly cause periodic and large-amplitude fluctuations in the internal temperature of the refrigerator compartment. For ingredients that require a stable low-temperature environment, such temperature fluctuations are undoubtedly harmful. It will accelerate the loss of nutrients and water evaporation of the ingredients, damage the cell structure, reduce their freshness and preservation duration, and it is difficult to meet the needs of modern consumers for high-quality preservation of ingredients.

[0004] In addition, the noise performance during the operation of the compressor also needs to be concerned. Especially during each start-up stage of the compressor, compared with when it enters the stable operation state, the operating noise generated is often more significant. This is because a large mechanical inertia needs to be overcome and a high starting current is generated during the start-up instant (correspondingly resulting in an instantaneous increase in power), accompanied by more obvious vibration and noise. Frequent start-stop means that this start-up noise and instantaneous power consumption increase phenomenon will occur repeatedly, which not only reduces the user experience of the product (especially more easily perceived in a quiet environment at night), but also may increase the mechanical loss of the compressor and the system energy consumption in the long run. Summary of the Invention

[0005] This application provides a variable - frequency refrigerator control system without shutdown to solve the problem that the compressor of an existing variable - frequency refrigerator often shuts down due to temperature changes inside the refrigerator.

[0006] The system includes:

[0007] A refrigerator temperature acquisition module, which is arranged in the refrigerator compartment. The refrigerator temperature acquisition module is configured to acquire the real - time temperature difference between the real - time compartment temperature and the set compartment temperature. The real - time compartment temperature is the temperature of the environment where the refrigerator compartment is located, and the set compartment temperature is the required temperature of the refrigerator compartment.

[0008] An instruction generation module, which is configured to generate a compressor control instruction according to the real - time temperature difference and the temperature difference range. The compressor control instruction is used to drive the compressor to operate according to the first speed scheme or the second speed scheme. The first speed scheme includes several sub - schemes with fixed and different speeds, and the second speed scheme includes a scheme for adaptively adjusting the speed.

[0009] Preferably, the refrigerator temperature acquisition module includes:

[0010] A compartment temperature acquisition unit, which is configured to acquire the real - time compartment temperature.

[0011] A set - temperature input unit, which is configured to set the set compartment temperature according to user requirements and record the set compartment temperature.

[0012] Preferably, the refrigerator temperature acquisition module further includes:

[0013] A temperature - difference calculation unit, which is configured to subtract the set compartment temperature from the real - time compartment temperature to obtain the real - time temperature difference.

[0014] Preferably, the instruction generation module includes:

[0015] A temperature judgment unit, which is configured to judge the interval to which the real - time temperature difference belongs in the temperature difference range and generate interval information according to the belonging interval.

[0016] An instruction generation unit, which is configured to generate the compressor control instruction according to the interval information.

[0017] Preferably, the temperature judgment unit is further configured to:

[0018] Determine whether the real-time temperature difference is greater than the temperature difference threshold; the temperature difference threshold is the difference between the real-time temperature of the compartment and the set temperature of the compartment after one door opening / closing information.

[0019] If so, generate a first compressor control instruction, which is used to drive the compressor to operate according to the first speed scheme.

[0020] If not, generate a second compressor control instruction, which is used to drive the compressor to operate according to the second speed scheme.

[0021] Preferably, the temperature difference threshold updates its value every time there is one door opening / closing information.

[0022] Preferably, the said interval includes a first interval, a second interval, a third interval, a fourth interval, a fifth interval and a sixth interval; the first interval, the second interval, the third interval, the fourth interval, the fifth interval and the sixth interval are connected in sequence and the interval values increase gradually.

[0023] The temperature judgment unit is further configured to:

[0024] When the real-time temperature difference is greater than the temperature difference threshold and the real-time temperature difference is in the first interval, generate first interval information.

[0025] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is in the second interval, generate second interval information.

[0026] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is in the third interval, generate third interval information.

[0027] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is in the fourth interval, generate fourth interval information.

[0028] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is in the fifth interval, generate fifth interval information.

[0029] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is in the sixth interval, generate sixth interval information.

[0030] Preferably, the instruction generation unit is further configured to:

[0031] Generate a first sub-compressor control instruction according to the first interval information, and the first sub-compressor control instruction is used to drive the compressor to operate at the first speed.

[0032] Generate a second sub-compressor control instruction according to the second interval information, where the second sub-compressor control instruction is used to drive the compressor to operate at a second speed;

[0033] Generate a third sub-compressor control instruction according to the third interval information, where the third sub-compressor control instruction is used to drive the compressor to operate at a third speed;

[0034] Generate a fourth sub-compressor control instruction according to the fourth interval information, where the fourth sub-compressor control instruction is used to drive the compressor to operate at a fourth speed;

[0035] Generate a fifth sub-compressor control instruction according to the fifth interval information, where the fifth sub-compressor control instruction is used to drive the compressor to operate at a fifth speed;

[0036] Generate a sixth sub-compressor control instruction according to the sixth interval information, where the sixth sub-compressor control instruction is used to drive the compressor to operate at a sixth speed; the first speed, the second speed, the third speed, the fourth speed, the fifth speed, and the sixth speed increase in sequence.

[0037] Preferably, the second speed scheme is based on the PID algorithm, and the second speed scheme is a scheme where the compressor does not stop.

[0038] Preferably, the system turns on the refrigerator temperature acquisition module and the instruction generation module after the defrosting cycle of the refrigerator.

[0039] As can be seen from the above, the present application provides a non-stop variable-frequency refrigerator control system, the system includes a refrigerator temperature acquisition module, the refrigerator temperature acquisition module is arranged in the refrigerator compartment, and the refrigerator temperature acquisition module is configured to acquire the real-time temperature difference between the real-time temperature of the compartment and the set temperature of the compartment; the real-time temperature of the compartment is the temperature of the environment where the refrigerator compartment is located, and the set temperature of the compartment is the required temperature of the refrigerator compartment; an instruction generation module, the instruction generation module is configured to generate a compressor control instruction according to the real-time temperature difference and the temperature difference interval; the compressor control instruction is used to drive the compressor to operate according to the first speed scheme or the second speed scheme, the first speed scheme includes several sub-schemes with fixed and different speeds, and the second speed scheme includes a scheme for adaptively adjusting the speed. The present application solves the problem that the compressor of the existing variable-frequency refrigerator often stops due to the change of the internal temperature of the refrigerator through the above scheme. Brief Description of the Drawings

[0040] To more clearly illustrate the technical solutions of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a schematic diagram of a control system for a non-stop variable-frequency refrigerator of the present application;

[0042] Figure 2 It is a schematic diagram of a refrigerator temperature acquisition module in a control system for a non-stop variable-frequency refrigerator of the present application;

[0043] Figure 3 It is a schematic diagram of an instruction generation module in a control system for a non-stop variable-frequency refrigerator of the present application. Detailed implementation manners

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0045] It should be noted that the brief description of the terms in the present application is only for facilitating the understanding of the following described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and general meanings.

[0046] It should be noted that in the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.

[0047] Figure 1 It is a schematic diagram of a control system for a non-stop variable-frequency refrigerator of the present application.

[0048] See Figure 1 It can be known that this embodiment provides a control system for a non-stop variable-frequency refrigerator, and the system includes:

[0049] The refrigerator temperature acquisition module 100 is arranged in the refrigerator compartment. The refrigerator temperature acquisition module 100 is configured to acquire the real-time temperature difference between the real-time compartment temperature and the set compartment temperature. The real-time compartment temperature is the temperature of the environment where the refrigerator compartment is located, and the set compartment temperature is the required temperature of the refrigerator compartment.

[0050] Specifically, in this embodiment, the refrigerator temperature acquisition module 100 is arranged in the refrigerator compartment. The arrangement method of the refrigerator temperature acquisition module 100 can be to set a temperature sensor in each compartment and set a data collection device to acquire the real-time compartment temperature of each compartment. The refrigerator temperature acquisition module 100 is composed of several temperature sensors and a data collection device. It can also be to set an independent refrigerator temperature acquisition module 100 in each compartment and use each refrigerator temperature acquisition module 100 to acquire the real-time compartment temperature of the corresponding compartment.

[0051] Among them, during the use of the refrigerator, a temperature generally needs to be set for the refrigeration of the refrigerator compartment, and this temperature is the set compartment temperature. In this embodiment, each time the set compartment temperature is set, the value of the set compartment temperature is recorded, and the real-time temperature difference between the real-time compartment temperature and the set compartment temperature is calculated through the refrigerator temperature acquisition module 100.

[0052] The system further includes:

[0053] An instruction generation module 200, which is configured to generate a compressor control instruction according to the real-time temperature difference and the temperature difference range. The compressor control instruction is used to drive the compressor 300 to operate according to the first speed scheme or the second speed scheme. The first speed scheme includes several sub-schemes with fixed and different speeds, and the second speed scheme includes a scheme for adaptively adjusting the speed.

[0054] Specifically, in this embodiment, after the real-time temperature difference is acquired, the refrigerator temperature acquisition module 100 acquires the real-time temperature of the corresponding compartment at intervals of a period of time, and generates the compressor control instruction through the real-time temperature, the set compartment temperature, the real-time temperature difference, and the temperature difference range acquired at this time, so as to perform automatic control on the compressor 300.

[0055] It can be understood that in this embodiment, the real-time temperature difference after a change in the door body information of the refrigerator is used as the basis for measuring the temperature, and the temperature difference between the compartment temperature and the set temperature is continuously acquired, and the real-time compressor 300 is controlled according to the change trend of this temperature.

[0056] It should be noted that the operating modes of the compressor 300 are divided into the first speed scheme and the second speed scheme. Among them, the first speed scheme includes several sub-schemes with stepped speed changes, while the second speed scheme is a scheme for adaptively adjusting the speed. It can be understood that the first speed scheme is for the case where the temperature of the refrigerator compartment shows an upward trend, and the second speed scheme is for the case where the temperature of the refrigerator compartment fluctuates within a small range periodically.

[0057] Figure 2 It is a schematic diagram of the refrigerator temperature acquisition module in a non-stop frequency conversion refrigerator control system of the present application.

[0058] See Figure 2 It can be known that, further, in some embodiments, the refrigerator temperature acquisition module 100 includes:

[0059] The compartment temperature acquisition unit 110 is configured to acquire the real-time temperature of the compartment.

[0060] Specifically, in this embodiment, the real-time temperature of the refrigerator compartment is acquired by the compartment temperature acquisition unit 110. Similar to the above content, the compartment temperature acquisition unit 110 can acquire the real-time temperature of only one compartment, or can acquire the real-time temperatures of all compartments in the same refrigerator.

[0061] The refrigerator temperature acquisition module 100 further includes:

[0062] The set temperature input unit 120 is configured to set the set temperature of the compartment according to the user's needs and record the set temperature of the compartment.

[0063] Specifically, in this embodiment, the acquisition of the real-time temperature of the compartment and the set temperature of the compartment is set as two channels. The set temperature input unit 120 sets the set temperature of the compartment according to the user's needs and records the set temperature of the compartment.

[0064] It should be noted that the refrigerator temperature acquisition module 100 may further include a corresponding data storage unit, and store the acquired data to facilitate data traceability for subsequent refrigerator maintenance.

[0065] Further, in some embodiments, the refrigerator temperature acquisition module 100 further includes:

[0066] The temperature difference calculation unit 130 is configured to subtract the real-time temperature of the compartment from the set temperature of the compartment to obtain the real-time temperature difference.

[0067] Specifically, in this embodiment, since the refrigerator temperature acquisition module 100 also needs to calculate the difference, the temperature difference calculation unit 130 is provided in the refrigerator temperature acquisition module 100. The temperature difference calculation unit 130 extracts the real-time compartment temperature and the set compartment temperature from the compartment temperature acquisition unit 110 and the set temperature input unit 120 respectively, and subtracts the real-time compartment temperature from the set compartment temperature to obtain the real-time temperature difference.

[0068] Figure 3 It is a schematic diagram of an instruction generation module in a control system of a variable-frequency refrigerator without stopping.

[0069] See Figure 3 As can be seen, further, in some embodiments, the instruction generation module 200 includes:

[0070] A temperature judgment unit 210, configured to judge the interval to which the real-time temperature difference belongs in the temperature difference interval, and generate interval information according to the belonging interval.

[0071] Specifically, in this embodiment, before generating an instruction, it is necessary to first judge the temperature interval belonging of the difference between the current temperature and the set temperature of the refrigerator compartment, that is, to judge how much the rotation speed of the compressor 300 needs to be set at this time through the temperature difference. The temperature judgment unit 210 generates the corresponding interval information by judging the interval to which the current temperature difference belongs in the temperature difference interval.

[0072] The instruction generation module 200 further includes:

[0073] An instruction generation unit 220, configured to generate the compressor control instruction according to the interval information.

[0074] Specifically, in this embodiment, after the temperature judgment unit generates the interval information, it is also necessary to cooperate with the instruction generation unit 220 to generate the corresponding compressor control instruction, so as to regulate the rotation speed of the compressor 300 through this instruction.

[0075] Further, in some embodiments, the temperature judgment unit 210 is further configured to:

[0076] Judge whether the real-time temperature difference is greater than the temperature difference threshold; the temperature difference threshold is the difference between the real-time compartment temperature and the set compartment temperature after a door opening / closing information.

[0077] If so, a first compressor control instruction is generated, and the first compressor control instruction is used to drive the compressor 300 to operate according to a first speed scheme;

[0078] If not, a second compressor control instruction is generated, and the second compressor control instruction is used to drive the compressor 300 to operate according to a second speed scheme.

[0079] Specifically, in this embodiment, since the operation schemes provided by the system for the compressor 300 are divided into the first speed scheme and the second speed scheme, and the first speed scheme includes several sub-schemes, it is necessary to first select between the first speed scheme and the second speed scheme. The selection method is to judge the relationship between the current temperature difference and the temperature threshold. If the current temperature difference is greater than the temperature threshold, it means that the temperature of the refrigerator compartment is on the rise or at a relatively high temperature. Therefore, it is necessary to execute the first speed scheme. On the contrary, the second speed scheme is executed.

[0080] It should be noted that more specific judgments are required for each sub-scheme in the first speed scheme.

[0081] It should be noted that the temperature difference threshold is the difference between the real-time temperature of the compartment and the set temperature of the compartment after one door opening / closing information. Therefore, the temperature difference threshold updates its value every time there is one door opening / closing information, so as to realize the adaptive change of the measurement standard, thereby making the operation of the compressor 300 more reasonable.

[0082] Further, in some embodiments, the said interval includes a first interval, a second interval, a third interval, a fourth interval, a fifth interval, and a sixth interval; the first interval, the second interval, the third interval, the fourth interval, the fifth interval, and the sixth interval are connected in sequence and the interval values increase step by step;

[0083] The temperature judgment unit 210 is further configured to:

[0084] When the real-time temperature difference is greater than the temperature difference threshold and the real-time temperature difference is in the first interval, generate first interval information;

[0085] When the real-time temperature difference is greater than the temperature difference threshold and the real-time temperature difference is in the second interval, generate second interval information;

[0086] When the real-time temperature difference is greater than the temperature difference threshold and the real-time temperature difference is in the third interval, generate third interval information;

[0087] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the fourth interval, generating fourth interval information;

[0088] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the fifth interval, generating fifth interval information;

[0089] When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the sixth interval, sixth interval information is generated.

[0090] Specifically, in this embodiment, the corresponding intervals are divided into the first interval, the second interval, the third interval, the fourth interval, the fifth interval and the sixth interval. The first interval, the second interval, the third interval, the fourth interval, the fifth interval and the sixth interval are connected in sequence and the interval values increase step by step. When the current temperature difference falls in each interval, interval information is generated for each interval, so as to cooperate with the generation of compressor control instructions in each subsequent stage.

[0091] Furthermore, in some embodiments, the instruction generation unit 220 is further configured to:

[0092] generating a first sub-compressor control instruction according to the first interval information, wherein the first sub-compressor control instruction is used to drive the compressor 300 to operate at a first speed;

[0093] generating a second sub-compressor control instruction according to the second interval information, wherein the second sub-compressor control instruction is used to drive the compressor 300 to operate at a second speed;

[0094] generating a third sub-compressor control instruction according to the third interval information, wherein the third sub-compressor control instruction is used to drive the compressor 300 to operate at a third speed;

[0095] generating a fourth sub-compressor control instruction according to the fourth interval information, wherein the fourth sub-compressor control instruction is used to drive the compressor 300 to operate at a fourth speed;

[0096] generating a fifth sub-compressor control instruction according to the fifth interval information, wherein the fifth sub-compressor control instruction is used to drive the compressor 300 to operate at a fifth speed;

[0097] A sixth sub-compressor control instruction is generated according to the sixth interval information, and the sixth sub-compressor control instruction is used to drive the compressor 300 to operate at a sixth speed; the first speed, the second speed, the third speed, the fourth speed, the fifth speed and the sixth speed increase in sequence.

[0098] Specifically, in this embodiment, respective compressor control instructions are generated according to the first interval information, the second interval information, the third interval information, the fourth interval information, the fifth interval information, or the sixth interval information generated above, so as to realize the stepped speed regulation of the compressor 300.

[0099] Further, in some embodiments, the second speed scheme is based on the PID algorithm, and the second speed scheme is a scheme in which the compressor 300 does not stop.

[0100] Specifically, in this embodiment, although the second speed scheme is an adaptive speed regulation, there is no situation where the compressor 300 stops. Even when the temperature of the refrigerator compartment is very suitable, the compressor 300 still runs at a low speed, so as to realize the non-stop refrigeration control of the variable-frequency refrigerator.

[0101] It should be noted that the above systems provided in this embodiment need to be carried out after the defrosting cycle of the refrigerator, that is, the refrigerator temperature acquisition module 100 and the instruction generation module 200 are turned on after the defrosting cycle of the refrigerator.

[0102] Exemplarily, the conventional operation cycle of a variable-frequency air-cooled refrigerator includes a refrigeration cycle and a defrosting cycle. The non-stop operation of the compressor in the present invention refers to the non-stop operation of the refrigerator during the refrigeration cycle, rather than the non-stop operation during the entire power-on operation stage of the refrigerator.

[0103] Set temperature T of the refrigerator compartment set , actual temperature T of the refrigerator compartment real , difference △T between the actual temperature and the set temperature of the refrigerator = T real -T set . By detecting the temperature of the refrigerator compartment in real time and calculating the difference △T between the actual temperature and the set temperature, since the temperature of the refrigerator compartment changes slowly, the compressor control rules are executed in two steps with △T = Th temperature difference as the dividing line. When △T>Th, the compressor speed control rule of Scheme A is executed. Scheme A sets the corresponding compressor operating speed gear according to the range of △T; when △T≤Th, the compressor speed control rule of Scheme B is executed. Scheme B uses the PID algorithm to automatically adjust the compressor speed according to the temperature change rate of the compartment to track the set temperature and keep the compressor running continuously without stopping.

[0104] (1): After the refrigerator is powered on, it is judged whether the refrigerator meets the defrosting condition. If it meets the defrosting condition, the defrosting process is executed. If it does not meet the defrosting condition, the processes (2) to (4) are executed.

[0105] (2): Real-time detect the actual temperature T real inside the refrigerator, and calculate the difference △T between the actual temperature and the set temperature of the refrigerator.

[0106] (3): When △T > Th, execute the compressor speed control rule of Plan A. There are 6 fixed compressor speed gears, namely S1, S2, S3, S4, S5, and S6, preset in the program. When △T > Th + 25°C, the compressor speed executes S6; when Th + 20°C < △T < Th + 25°C, the compressor speed executes S5; when Th + 15°C < △T < Th + 20°C, the compressor speed executes S4; when Th + 10°C < △T < Th + 15°C, the compressor speed executes S3; when Th + 5°C < △T < Th + 10°C, the compressor speed executes S2; when Th < △T < Th + 5°C, the compressor speed executes S1.

[0107] (4): When △T ≤ Th, execute the compressor speed control rule of Plan B. Let N be the calculated operating speed of the compressor, and Kp, Ki, and Kd be the algorithm control parameters. N = Kp(Tset - Treal) + Ki∫(Tset - Treal)dt + Kd d(Tset - Treal) / dt. Calculate the operating speed N of the compressor through the PID algorithm and operate at this speed.

[0108] The advantages of this embodiment include:

[0109] (1) The compressor does not stop, reducing the temperature fluctuation inside the refrigerator and improving the refrigeration and freshness preservation effect of the refrigerator; (2) reducing the start-stop times of the compressor, reducing the noise in the start-up stage, reducing the start-up energy consumption, and helping to improve the energy efficiency of the refrigerator.

[0110] For the sake of convenience in explanation, the above description has been made in conjunction with specific embodiments. However, the above discussion in some embodiments is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for better explaining the content of the present disclosure, so that those skilled in the art can better use the embodiments.

Claims

1. A variable-frequency refrigerator control system that does not require shutdown, characterized in that, The system includes: A refrigerator temperature acquisition module (100), which is arranged in a refrigerator compartment. The refrigerator temperature acquisition module (100) is configured to acquire the real-time temperature difference between the real-time compartment temperature and the set compartment temperature. The real-time compartment temperature is the temperature of the environment where the refrigerator compartment is located, and the set compartment temperature is the required temperature of the refrigerator compartment. An instruction generation module (200), which is configured to generate a compressor control instruction according to the real-time temperature difference and the temperature difference range. The compressor control instruction is used to drive a compressor (300) to operate according to a first speed scheme or a second speed scheme. The first speed scheme includes several sub-schemes with fixed and different speed values, and the second speed scheme includes a scheme for adaptively adjusting the speed.

2. The non-stop frequency conversion refrigerator control system according to claim 1, characterized in that The refrigerator temperature acquisition module (100) includes: A compartment temperature acquisition unit (110), which is configured to acquire the real-time compartment temperature. A set temperature input unit (120), which is configured to set the set compartment temperature according to user requirements and record the set compartment temperature.

3. A control system for a variable-frequency refrigerator without shutdown according to claim 1, characterized in that The refrigerator temperature acquisition module (100) further includes: A temperature difference calculation unit (130), which is configured to subtract the real-time compartment temperature from the set compartment temperature to obtain the real-time temperature difference.

4. A non-stop frequency conversion refrigerator control system according to claim 1, characterized in that, The instruction generation module (200) includes: A temperature judgment unit (210), which is configured to judge the interval to which the real-time temperature difference belongs within the temperature difference range and generate interval information according to the belonging interval. An instruction generation unit (220), which is configured to generate the compressor control instruction according to the interval information.

5. The control system of a variable-frequency refrigerator without shutdown according to claim 4, wherein The temperature judgment unit (210) is further configured to: Judge whether the real-time temperature difference is greater than the temperature difference threshold. The temperature difference threshold is the difference between the real-time compartment temperature and the set compartment temperature after a door opening / closing information. If so, generate a first compressor control instruction, which is used to drive the compressor (300) to operate according to the first speed scheme. If not, generate a second compressor control instruction, which is used to drive the compressor (300) to operate according to the second speed scheme.

6. The control system of a variable-frequency refrigerator without shutdown according to claim 5, characterized in that, The temperature difference threshold updates its value every time the door opening / closing information exists.

7. The control system of a variable-frequency refrigerator without shutdown according to claim 5, characterized in that The belonging interval includes a first interval, a second interval, a third interval, a fourth interval, a fifth interval, and a sixth interval. The first interval, the second interval, the third interval, the fourth interval, the fifth interval, and the sixth interval are connected in sequence and the interval values increase step by step. The temperature judgment unit (210) is further configured to: When the real-time temperature difference is greater than the temperature difference threshold and the real-time temperature difference is within the first interval, generate first interval information. When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the second interval, generate second interval information; When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the third interval, generate third interval information; When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the fourth interval, generate fourth interval information; When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the fifth interval, generate fifth interval information; When the real-time temperature difference is greater than the temperature difference threshold and when the real-time temperature difference is within the sixth interval, generate sixth interval information.

8. The control system of a variable-frequency refrigerator without shutdown according to claim 7, characterized in that The instruction generation unit (220) is further configured to: Generate a first sub-compressor control instruction according to the first interval information, and the first sub-compressor control instruction is used to drive the compressor (300) to operate at a first speed; Generate a second sub-compressor control instruction according to the second interval information, and the second sub-compressor control instruction is used to drive the compressor (300) to operate at a second speed; Generate a third sub-compressor control instruction according to the third interval information, and the third sub-compressor control instruction is used to drive the compressor (300) to operate at a third speed; Generate a fourth sub-compressor control instruction according to the fourth interval information, and the fourth sub-compressor control instruction is used to drive the compressor (300) to operate at a fourth speed; Generate a fifth sub-compressor control instruction according to the fifth interval information, and the fifth sub-compressor control instruction is used to drive the compressor (300) to operate at a fifth speed; Generate a sixth sub-compressor control instruction according to the sixth interval information, and the sixth sub-compressor control instruction is used to drive the compressor (300) to operate at a sixth speed; the first speed, the second speed, the third speed, the fourth speed, the fifth speed, and the sixth speed increase in sequence.

9. The non-stop frequency conversion refrigerator control system according to claim 1, wherein, The second speed scheme is based on the PID algorithm, and the second speed scheme is a scheme in which the compressor (300) does not stop.

10. The control system of a variable-frequency refrigerator without shutdown according to claim 1, characterized in that, The system turns on the refrigerator temperature acquisition module (100) and the instruction generation module (200) after the defrosting cycle of the refrigerator.

Images