Control method and device for eliminating abnormal sound of liquid storage device during defrosting and refrigerating system

Abstract

The invention relates to a control method and device for eliminating abnormal sound of a liquid storage device during defrosting and a refrigerating system.The control method comprises the steps that after the defrosting stage starts, temperature related parameters in the refrigerating system are obtained, and the temperature related parameters comprise the first temperature of an evaporator (6) and the second temperature of the liquid storage device (1); and the working state of a compressor (7) is controlled according to the temperature related parameters, so that accumulation of a liquid refrigerant in the liquid storage device (1) in the defrosting process is slowed down.

Description

Technical Field

[0001] This disclosure relates to the field of refrigeration system control technology, and in particular to a control method, control device and refrigeration system for eliminating abnormal noise in the liquid receiver during defrosting. Background Technology

[0002] Currently, refrigerators have gradually become an indispensable part of daily life. With the development of technology, frost-free refrigerators have replaced direct-cooling refrigerators as the mainstream in the market. Compared with direct-cooling refrigerators, frost-free refrigerators have advantages such as faster cooling rate and automatic defrosting. In traditional frost-free refrigerators, to prevent liquid refrigerant from directly entering the compressor and causing damage, a liquid receiver is installed at the evaporator outlet during defrosting.

[0003] In actual use, occasional abnormal noises may occur inside the reservoir. Although these noises are relatively faint, they can still affect the user experience. Traditional solutions include attaching damping materials to the surface of the reservoir to block the noise, or modifying the reservoir's structure, such as inverting it, to reduce the noise. However, neither of these methods fundamentally solves the problem of the noise. Summary of the Invention

[0004] The embodiments of this disclosure provide a control method, control device, and refrigeration system for eliminating abnormal noise from the liquid receiver during defrosting, which can effectively reduce the abnormal noise generated by the liquid receiver during defrosting.

[0005] According to a first aspect of this disclosure, a control method for eliminating abnormal noise from a reservoir during defrosting is proposed, comprising:

[0006] After the defrosting stage begins, acquire the temperature-related parameters of the refrigeration system, including the first temperature of the evaporator and the second temperature of the liquid receiver.

[0007] The compressor's operating status is controlled based on temperature-related parameters to slow down the accumulation of liquid refrigerant inside the receiver during the defrosting process.

[0008] In some embodiments, the control method for eliminating abnormal noise from the reservoir during defrosting further includes:

[0009] Calculate the first temperature rise rate and the second temperature rise rate based on the first temperature and the second temperature, respectively;

[0010] The temperature-related parameters include a first temperature rise rate and a second temperature rise rate; wherein the first temperature rise rate is the rate of change of the first temperature over time, and the second temperature rise rate is the rate of change of the second temperature over time.

[0011] In some embodiments, if the compressor is in a stopped state, controlling the compressor's operating state based on temperature-related parameters specifically includes:

[0012] The compressor is started when the first temperature is greater than the first preset temperature and the first temperature rise rate is greater than the preset temperature rise rate.

[0013] In some embodiments, if the compressor is in the start-up state, controlling the compressor's operating state according to temperature-related parameters specifically includes:

[0014] When the first temperature is less than or equal to the first preset temperature, reduce the operating frequency of the compressor; and / or

[0015] When the first temperature is greater than the first preset temperature and the second temperature rise rate is less than zero, the operating frequency of the compressor is reduced.

[0016] In some embodiments, if the compressor is in the start-up state, controlling the compressor's operating state according to temperature-related parameters specifically includes:

[0017] When the first temperature is greater than the first preset temperature and the second temperature rise rate is not less than zero, the operating state of the compressor is controlled according to the relationship between the first temperature rise rate and the preset temperature rise rate.

[0018] In some embodiments, the step of controlling the compressor's operating state based on the relationship between a first temperature rise rate and a preset temperature rise rate includes:

[0019] If the first temperature rise rate is less than zero, reduce the compressor's operating frequency; and / or

[0020] Under the condition that the first temperature rise rate is not less than zero and not greater than the preset temperature rise rate, the compressor is kept running at the current frequency; and / or

[0021] When the first temperature rise rate is greater than the preset temperature rise rate, the compressor state is controlled according to the relationship between the second temperature and the second preset temperature.

[0022] In some embodiments, the step of controlling the state of the compressor based on the relationship between the second temperature and the second preset temperature includes:

[0023] If the second temperature is less than or equal to the second preset temperature, increase the operating frequency of the compressor; and / or

[0024] When the second temperature is greater than the second preset temperature, the state of the compressor is controlled according to the relationship between the first temperature rise rate and the second temperature rise rate.

[0025] In some embodiments, the step of controlling the state of the compressor according to the relationship between the first temperature rise rate and the second temperature rise rate includes:

[0026] If the first temperature rise rate is greater than the second temperature rise rate, increase the operating frequency of the compressor;

[0027] If the first temperature rise rate is not greater than the second temperature rise rate, the compressor is kept running at the current frequency.

[0028] In some embodiments, the control method for eliminating abnormal noise from the reservoir during defrosting includes:

[0029] After the defrosting stage begins, start the compressor for a preset time.

[0030] In some embodiments, the control method for eliminating abnormal noise from the reservoir during defrosting further includes:

[0031] After defrosting is complete, stop the compressor from running.

[0032] According to a second aspect of this disclosure, a control device is proposed, including a memory and a processor coupled to the memory, the processor being configured to execute a control method for eliminating reservoir noise during defrosting as described in the above embodiments based on instructions stored in the memory.

[0033] According to a third aspect of this disclosure, a refrigeration system is proposed, comprising:

[0034] The compressor has an air intake port;

[0035] The evaporator has a refrigerant outlet, which is connected to the air intake.

[0036] A receiver-of-refrigerant (ROR) is located between the evaporator and the compressor. The RRO has a refrigerant inlet pipe and a refrigerant outlet pipe. The RRO connects to the refrigerant outlet pipe and the refrigerant outlet pipe connects to the suction port.

[0037] The control device described in the above embodiments.

[0038] In some embodiments, the refrigeration system further includes:

[0039] A first temperature sensing element, located on the evaporator, is configured to detect the temperature of the evaporator; and

[0040] The second temperature detection component is located on the liquid reservoir and is configured to detect the temperature of the liquid reservoir.

[0041] In some embodiments, the reservoir is tilted, and the second temperature sensing component is located on the downward-facing sidewall of the reservoir, in the lower middle region along the height direction of the reservoir.

[0042] According to a fourth aspect of this disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, which are executed by a processor as described above in the control method for eliminating abnormal noise from a reservoir during defrosting.

[0043] According to a fifth aspect of this disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements a control method for eliminating abnormal noise from the reservoir during defrosting as described in the above embodiments.

[0044] Based on the above technical solution, the control method for eliminating abnormal noise from the receiver during defrosting according to this embodiment of the present disclosure obtains a first temperature of the evaporator and a second temperature of the receiver. The first temperature determines the amount of gaseous refrigerant generated in the evaporator, thus determining whether a large amount of gaseous refrigerant will enter the receiver. The second temperature determines whether a large amount of gaseous refrigerant will condense into liquid refrigerant. Therefore, when it is determined that a large amount of liquid refrigerant will be generated in the receiver, the compressor is started in a timely manner or its operating frequency is increased to promptly convert the liquid refrigerant in the receiver into gas, thereby reducing the problem of abnormal noise from the receiver during defrosting. Furthermore, when the amount of liquid refrigerant in the receiver decreases to below the inner end of the refrigerant inlet pipe, the compressor can be stopped or its operating frequency reduced to prevent the system's cooling operation from affecting the defrosting effect. Attached Figure Description

[0045] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0046] Figure 1 This is a schematic diagram of a liquid refrigerant exceeding the refrigerant inlet pipe in a liquid storage tank of a related technology.

[0047] Figure 2 A schematic diagram of a structure for setting a damping layer on the outside of a liquid reservoir in a related technology.

[0048] Figure 3 This is a schematic diagram of a liquid receiver in a related technology where the refrigerant inlet pipe is located at the top.

[0049] Figure 4 This is a schematic diagram of a structure in which a second temperature detection component is provided on the outer wall of the liquid reservoir according to some embodiments of this disclosure.

[0050] Figure 5 This is a schematic diagram illustrating the principle of some embodiments of the refrigeration system disclosed herein.

[0051] Figure 6 This is a flowchart illustrating the control method for eliminating abnormal noise from the reservoir during defrosting as disclosed in this publication.

[0052] Explanation of reference numerals in the attached figures

[0053] 1a. Receiver; 2a. Refrigerant inlet pipe; 3a. Refrigerant outlet pipe; 4a. Liquid refrigerant; 5a. Damping component;

[0054] 1. Receiver; 2. Refrigerant inlet pipe; 3. Refrigerant outlet pipe; 4. Liquid refrigerant; 5. Second temperature detection component; 6. Evaporator; 61. Refrigerant inlet; 62. Refrigerant outlet; 7. Compressor; 71. Suction port; 72. Discharge port; 8. First temperature detection component; 9. Condenser. Detailed Implementation

[0055] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0056] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0057] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0058] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0059] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0060] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0061] In refrigeration systems like air-cooled refrigerators, frost and even ice can form on the evaporator surface after prolonged operation. Currently, a defrosting heater is typically added to the bottom of the evaporator. The heat generated by the heater melts the ice or frost layer on the evaporator, achieving defrosting. Due to the rising temperature at the bottom of the evaporator, the refrigerant at the bottom flows upwards until it reaches the refrigerant outlet, i.e., the return gas side. However, because the temperature at the top of the evaporator is still very low, the vaporized refrigerant will reliquefy into liquid refrigerant in this area. To prevent liquid refrigerant from directly entering the compressor through the return gas side and causing liquid slugging, a liquid receiver is usually installed at the evaporator outlet to store the liquid refrigerant.

[0062] like Figure 1 As shown, the liquid receiver 1a in the related technology is equipped with a refrigerant inlet pipe 2a and a refrigerant outlet pipe 3a. The refrigerant inlet pipe 2a extends a certain distance from the bottom of the liquid receiver 1a, and the gas-liquid mixed refrigerant is introduced through the refrigerant inlet pipe 2a, partially forming liquid refrigerant 4a. During actual defrosting, sometimes abnormal noises may occur inside the liquid receiver 1a. The main reason is that when there is too much liquid refrigerant 4a in the liquid receiver 1a, and the liquid level is higher than the inner end of the refrigerant inlet pipe 2a, the gaseous refrigerant coming out of the refrigerant inlet pipe 2a needs to rise to the liquid level through the liquid refrigerant 4a. Due to the change in air pressure inside and outside the bubbles, they will burst, producing abnormal noises. Although this abnormal noise is slight, it can still affect the user experience.

[0063] like Figure 2 As shown, one solution is to attach a damping element 5a to the outer wall of the reservoir 1a to physically isolate the noise, but this method does not fundamentally solve the noise during defrosting.

[0064] like Figure 3 As shown, another solution is to reduce abnormal noise by changing the structure of the receiver 1a, for example, by inverting the receiver 1a. That is, the refrigerant inlet pipe 2a is located on top and the refrigerant outlet pipe 3a is located on the bottom, which can prevent the refrigerant inlet pipe 2a from being submerged by the liquid refrigerant 4a and alleviate the problem of abnormal noise. However, when the liquid refrigerant 4a submerges the refrigerant outlet pipe 3a, it not only hinders the discharge of gaseous refrigerant from the refrigerant outlet pipe 3a, but the liquid refrigerant 4a will also directly enter the compressor through the refrigerant outlet pipe 3a, causing the receiver 1a to become ineffective.

[0065] Therefore, this disclosure provides a better control method for eliminating abnormal noise from the reservoir during defrosting, referencing... Figures 4 to 6 As shown, in some embodiments, the control method includes:

[0066] After the defrosting stage begins, acquire the temperature-related parameters of the refrigeration system, including the first temperature of the evaporator 6 and the second temperature of the receiver 1.

[0067] The operating status of compressor 7 is controlled according to temperature-related parameters to slow down the accumulation of liquid refrigerant inside receiver 1 during the defrosting process.

[0068] The receiver 1 is used in the refrigeration system, which can be a refrigerator, such as a frost-free refrigerator, or an air conditioner. After the evaporator 6 is frosted, the defrosting mode is activated. Once the defrosting stage begins, temperature-related parameters of the refrigeration system can be acquired immediately or after a preset delay. A defrosting heater can be installed at the bottom of the evaporator 6 to achieve defrosting.

[0069] For example, a first temperature detection component 8 can be installed on the evaporator 6 to detect the first temperature, and a second temperature detection component 5 can be installed on the liquid receiver 1 to detect the second temperature, such as using a temperature sensor or a temperature sensing bulb. After the defrosting heater is turned on, the first and second temperatures can be obtained every t seconds.

[0070] Based on temperature-related parameters, the amount of liquid refrigerant formed in the receiver 1 can be determined, thereby controlling the operating state of the compressor 7 to slow down the accumulation of liquid refrigerant inside the receiver 1 during defrosting. This includes reducing the amount of liquid refrigerant in the receiver 1 and / or reducing the rate of increase of liquid refrigerant in the receiver 1, so that the refrigerant level inside the receiver 1 during defrosting does not exceed the inner end of the refrigerant inlet pipe 2 of the receiver 1. Controlling the operating state of the compressor 7 includes controlling the compressor 7 to be in a stopped state or a started state. In the started state, the operating frequency of the compressor 7 can be controlled, which can increase or decrease the operating frequency of the compressor 7, or maintain the current operating frequency of the compressor 7 unchanged.

[0071] This embodiment obtains a first temperature of the evaporator 6 and a second temperature of the receiver 1. The first temperature determines the amount of gaseous refrigerant produced in the evaporator 6, indicating whether a large amount of gaseous refrigerant will enter the receiver 1. The second temperature determines whether a large amount of gaseous refrigerant will condense into liquid refrigerant. Therefore, when it is determined that a large amount of liquid refrigerant will be produced in the receiver 1, the compressor 7 is started in a timely manner or its operating frequency is increased to promptly convert the liquid refrigerant in the receiver 1 into gas, thereby reducing the problem of abnormal noise from the receiver 1 during defrosting. Furthermore, when the amount of liquid refrigerant in the receiver 1 decreases to below the inner end of the refrigerant inlet pipe 2 of the receiver 1, the compressor 7 can be stopped or its operating frequency reduced to prevent the system's cooling operation from affecting the defrosting effect.

[0072] Specifically, when the first temperature is low, for example, when the first temperature is not greater than the first preset temperature, which can be the refrigerant evaporation temperature, the refrigerant inside the evaporator 6 is in a liquid state. The refrigerant will not flow into the liquid receiver 1 in large quantities. It can be determined that the risk of liquid refrigerant accumulating in the liquid receiver 1 is small, and it is not necessary to turn on the compressor 7 temporarily. When the first temperature is relatively high, for example, when the first temperature is higher than the first preset temperature, the refrigerant inside the evaporator 6 will gradually begin to be converted into gaseous refrigerant. When there is a large amount of gas-liquid mixed refrigerant entering the liquid receiver 1 and the second temperature of the liquid receiver 1 is relatively low, a large amount of liquid refrigerant 4 may be generated. In this case, the compressor 7 can be started. After the gaseous refrigerant is drawn into the compressor 7, the pressure inside the liquid receiver 1 will decrease, which will help to promote the conversion of liquid refrigerant 4 into gaseous refrigerant. The liquid refrigerant 4 itself will also evaporate in small amounts. Even if the liquid refrigerant 4 inside the liquid receiver 1 is converted into gaseous refrigerant and drawn into the suction port 71 of the compressor 7, the amount of liquid refrigerant 4 can be reduced. The gaseous refrigerant from the evaporator 6 can be drawn away in time to prevent the gaseous refrigerant accumulated in the liquid receiver 1 from recondensing into liquid refrigerant. This will prevent the liquid level from being higher than the inner end of the refrigerant inlet pipe 2 of the liquid receiver 1, thereby eliminating the abnormal noise generated during defrosting.

[0073] In some embodiments, the control method for eliminating abnormal noise from the reservoir during defrosting disclosed herein further includes:

[0074] Calculate the first temperature rise rate and the second temperature rise rate based on the first temperature and the second temperature, respectively;

[0075] The temperature-related parameters include a first temperature rise rate and a second temperature rise rate; wherein the first temperature rise rate is the rate of change of the first temperature over time, and the second temperature rise rate is the rate of change of the second temperature over time.

[0076] This embodiment, based on the first and second temperatures, simultaneously controls the operating state of the compressor 7 by combining the first and second temperature rise rates. The first temperature rise rate reflects the trend of gaseous refrigerant production in the evaporator 6. If a large amount of gaseous refrigerant is produced, a large amount of liquid refrigerant 4 will accumulate in the receiver 1. In this case, the compressor 7 can be started to promote the conversion of liquid refrigerant into gaseous refrigerant, maintaining the liquid refrigerant 4 at a level not higher than the inner end of the refrigerant inlet pipe 2, thus reducing abnormal noise during the defrosting process. Moreover, during the refrigerant suction process after the compressor 7 is turned on, the second temperature rise rate can determine whether the current cooling load is large, so as to prevent gaseous refrigerant from being more easily converted into liquid refrigerant 4 in the receiver 1 at low temperatures. To reduce the risk of liquid accumulation and reduce power consumption, the compressor can be controlled to slowly reduce power until it stops.

[0077] Specifically, when the first temperature rise rate is greater than zero, it indicates that the temperature of the evaporator 6 is continuously rising. If the first temperature rise rate is detected to exceed the preset temperature rise rate, which can be set in advance in the system, it can be determined based on factors such as the equipment model, the volume of the liquid receiver 1, the refrigerant type, and the defrosting power. At this time, it can be determined that a large amount of refrigerant inside the evaporator 6 will flow rapidly into the liquid receiver 1 to cool down and become liquid refrigerant, and accumulate in the liquid receiver 1. In this case, the compressor 7 can be started and run at a lower frequency to draw the gaseous refrigerant inside the liquid receiver 1 into the compressor 7, causing the liquid refrigerant 4 in the liquid receiver 1 to be converted into gaseous refrigerant, and maintaining the liquid refrigerant 4 at a level not higher than the inner end of the refrigerant inlet pipe 2.

[0078] During the refrigerant extraction process after compressor 7 starts, the timing for reducing the operating frequency of compressor 7 or stopping it can be determined by considering the second temperature rise rate. This is because compressor 7 operates in a cooling state, and continuous operation for a period increases the cooling load. Furthermore, the defrosting heater is active during this time, effectively increasing the refrigerant flow rate and allowing more refrigerant to enter the receiver 1. If the second temperature rise rate is less than zero, it indicates that the current cooling load exceeds the heating load. In this case, gaseous refrigerant is more likely to convert into liquid refrigerant 4 in receiver 1, increasing the risk of liquid accumulation. To reduce the risk of liquid accumulation and lower power consumption, the compressor's power can be gradually reduced until it stops.

[0079] In some embodiments, such as Figure 6 As shown, if compressor 7 is in a stopped state, controlling the operating state of compressor 7 according to temperature-related parameters specifically includes:

[0080] When the first temperature is greater than the first preset temperature and the first temperature rise rate is greater than the preset temperature rise rate, the compressor 7 is started.

[0081] In this process, after the defrosting stage begins, it is determined whether the compressor 7 is turned on. If it is in a stopped state, it is first determined whether the first temperature is less than or equal to the first preset temperature. If not, it is further determined whether the first temperature rise rate is greater than the preset temperature rise rate. If so, the first temperature and the second temperature are continuously obtained. If the first temperature rise rate is greater than the preset temperature rise rate, the compressor 7 is started and runs at a lower frequency. Otherwise, the first temperature and the second temperature are continuously obtained.

[0082] For example, the first preset temperature can be the refrigerant evaporation temperature, and the preset temperature rise rate can be determined based on factors such as the equipment model, the volume of the liquid receiver 1, the type of refrigerant, and the defrosting power.

[0083] Optionally, if the first temperature is greater than the first preset temperature and the first temperature rise rate is less than zero, the operating frequency of the compressor 7 can be reduced, or the compressor 7 can be stopped. This prevents the first temperature rise rate from affecting the defrosting process during defrosting, thus ensuring the defrosting effect.

[0084] In this embodiment, when the first temperature is greater than the first preset temperature and the first temperature rise rate is greater than the preset temperature rise rate, it indicates that the evaporator 6 has reached a high temperature and the temperature is still rising. At this time, the evaporator 6 will produce a large amount of gaseous refrigerant. After the gaseous refrigerant enters the liquid receiver 1, it is easily converted into a large amount of liquid refrigerant 4.

[0085] This situation is mitigated by starting the compressor 7. After the gaseous refrigerant is drawn into the compressor 7, the pressure inside the receiver 1 will decrease, which will help to convert the liquid refrigerant 4 into gaseous refrigerant. The liquid refrigerant 4 itself will also evaporate in small amounts. Even if the liquid refrigerant 4 inside the receiver 1 is converted into gaseous refrigerant and drawn into the suction port 71 of the compressor 7, the amount of liquid refrigerant 4 in the receiver 1 can be reduced, and the liquid level will not be higher than the inner end of the refrigerant inlet pipe 2 of the receiver 1, thereby eliminating the abnormal noise generated during defrosting.

[0086] In some embodiments, such as Figure 6 As shown, if compressor 7 is in the start-up state, controlling the operating state of compressor 7 according to temperature-related parameters specifically includes:

[0087] If the first temperature is less than or equal to the first preset temperature, reduce the operating frequency of compressor 7; and / or

[0088] When the first temperature is greater than the first preset temperature and the second temperature rise rate is less than zero, the operating frequency of compressor 7 is reduced.

[0089] This embodiment takes into account that when the first temperature of the evaporator 6 is less than or equal to the first preset temperature, the temperature of the evaporator 6 is low, and the refrigerant inside the evaporator 6 is mainly liquid. The refrigerant will not flow into the interior of the liquid receiver 1 in large quantities, so it can be determined that the risk of liquid refrigerant accumulating in the liquid receiver 1 is small. If the compressor 7 continues to work, it will further reduce the temperature of the refrigerant, which will increase the amount of liquid refrigerant in the liquid receiver 1. At this time, reducing the operating frequency of the compressor 7 can prevent the amount of liquid refrigerant in the liquid receiver from increasing due to further temperature reduction, and avoid the liquid level from being higher than the inner end of the refrigerant inlet pipe 2 of the liquid receiver 1, thereby eliminating the abnormal noise generated during defrosting; moreover, it can also reduce the energy consumption of the compressor 7.

[0090] If the first temperature is higher than the first preset temperature, it indicates that the current temperature of evaporator 6 is high, and more gaseous refrigerant will be generated inside evaporator 6 and enter the liquid receiver 1. Furthermore, if the second temperature rise rate is less than zero, it means that after compressor 7 has been running for a period of time, the system has increased the cooling load through the refrigeration cycle, and the cooling load in the system is already greater than the heating load. At this time, the defrosting heater is also working, which is equivalent to increasing the refrigerant flow rate, causing more refrigerant to enter the liquid receiver 1. In this case, the gaseous refrigerant is more likely to convert into liquid refrigerant 4 in the liquid receiver 1, increasing the risk of liquid accumulation. By reducing the compressor's operating frequency, the risk of abnormal noise caused by liquid accumulation can be reduced, and power consumption can be lowered.

[0091] In some embodiments, such as Figure 6 As shown, if compressor 7 is in the start-up state, controlling the operating state of compressor 7 according to temperature-related parameters specifically includes:

[0092] When the first temperature is greater than the first preset temperature and the second temperature rise rate is not less than zero, the working state of the compressor 7 is controlled according to the relationship between the first temperature rise rate and the preset temperature rise rate.

[0093] The fact that the second temperature rise rate is not less than zero indicates that the temperature of the liquid reservoir 1 remains constant or is still rising.

[0094] In this embodiment, if the first temperature of the evaporator 6 is greater than the first preset temperature, it indicates that the current temperature of the evaporator 6 is high, and more gaseous refrigerant will be generated inside the evaporator 6 and enter the receiver 1. If the second temperature rise rate is greater than zero at this time, it means that the refrigerant in the system has not yet reached a large cooling capacity, and there is no urgent need to stop the compressor 7 from running. By further judging the relationship between the first temperature rise rate and the preset temperature rise rate, it can be determined whether the evaporator 6 will generate more gaseous refrigerant next. Based on this, the control method of the compressor 7 can be determined. Through more precise control, the refrigerant liquid level inside the receiver 1 during the defrosting process will not be higher than the inner end of the refrigerant inlet pipe 2 of the receiver 1, preventing abnormal noise during the defrosting process, and also minimizing the power loss of the compressor 7.

[0095] In some embodiments, such as Figure 6 As shown, the steps for controlling the operating state of compressor 7 based on the relationship between the first temperature rise rate and the preset temperature rise rate include:

[0096] If the first temperature rise rate is less than zero, reduce the operating frequency of compressor 7; and / or

[0097] Under the condition that the first temperature rise rate is not less than zero and not greater than the preset temperature rise rate, the compressor 7 is kept running at the current frequency; and / or

[0098] When the first temperature rise rate is greater than the preset temperature rise rate, the state of compressor 7 is controlled according to the relationship between the second temperature and the second preset temperature.

[0099] For example, the second preset temperature can be the refrigerant evaporation temperature. The second preset temperature can be the same as or different from the first preset temperature.

[0100] The above judgment in this embodiment is based on the condition that the first temperature is greater than the first preset temperature and the second temperature rise rate is not less than zero. Through the above analysis, it is shown that the refrigerant in the system has not yet reached a large cooling capacity, and there is no urgent need to stop the compressor 7 from running at this time.

[0101] At this time, if the first temperature rise rate is less than zero, it means that the first temperature of the evaporator 6 is decreasing. The refrigerant inside the evaporator 6 will not be converted into gaseous refrigerant in large quantities, and will not continue to flow into the liquid receiver 1 in large quantities. It can be determined that the risk of liquid refrigerant accumulating in the liquid receiver 1 is small, and the operating frequency of the compressor 7 can be reduced to save energy. Considering that the first temperature of the evaporator 6 is still greater than the first preset temperature, the compressor 7 can still prevent abnormal noise by operating at a lower frequency.

[0102] If the first temperature rise rate is not less than zero and not greater than the preset temperature rise rate, it means that the first temperature of the evaporator 6 remains unchanged or is still rising, but the temperature rise rate is slow. In this case, the evaporator 6 will still produce a certain amount of gaseous refrigerant that enters the liquid receiver 1. In order to prevent the risk of liquid accumulation and keep the compressor 7 running at the current frequency, the refrigerant in the liquid receiver 1 can be continuously drawn into the compressor 7.

[0103] If the first temperature rise rate is greater than the preset temperature rise rate, it means that the first temperature of the evaporator 6 is still rising rapidly. The evaporator 6 will also produce a large amount of gaseous refrigerant that enters the liquid receiver 1. At this time, by judging the relationship between the second temperature and the second preset temperature, it is possible to further judge whether the large amount of gaseous refrigerant will easily be converted into liquid refrigerant after entering the liquid receiver 1. Based on this, the operating status of the compressor 7 can be controlled more accurately and objectively, which can not only meet the need to eliminate abnormal noise, but also save the energy consumption of the compressor 7.

[0104] In some embodiments, such as Figure 6 As shown, the steps for controlling the state of compressor 7 based on the relationship between the second temperature and the first preset temperature include:

[0105] If the second temperature is less than or equal to the second preset temperature, increase the operating frequency of compressor 7; and / or

[0106] When the second temperature is greater than the second preset temperature, the state of the compressor 7 is controlled according to the relationship between the first temperature rise rate and the second temperature rise rate.

[0107] The above judgment in this embodiment is based on the condition that the first temperature is greater than the first preset temperature, the second temperature rise rate is not less than, and the first temperature rise rate is greater than the preset temperature rise rate. Through the above analysis, it is shown that the refrigerant in the system has not yet reached a large cooling capacity. At this time, there is no urgent need to stop the compressor 7 from running. However, the first temperature of the evaporator 6 is still rising rapidly, and the evaporator 6 will also produce a large amount of gaseous refrigerant that enters the liquid receiver 1.

[0108] Based on this, if the second temperature is less than or equal to the second preset temperature, it indicates that the temperature of the receiver 1 is low. A large amount of gaseous refrigerant entering the receiver 1 is easily converted into liquid refrigerant 4. By increasing the operating frequency of the compressor 7, the refrigerant can be drawn in, reducing the pressure inside the receiver 1, accelerating the conversion of liquid refrigerant 4 into gaseous refrigerant, preventing the liquid refrigerant 4 from exceeding the inner end of the refrigerant inlet pipe 2, and eliminating abnormal noise. If the second temperature is greater than the second preset temperature, it indicates that a large amount of gaseous refrigerant entering the receiver 1 is not easily converted into liquid refrigerant 4. At this time, the state of the compressor 7 is further controlled according to the relationship between the first temperature rise rate and the second temperature rise rate. This is equivalent to simultaneously considering the situation of gaseous refrigerant generated by the evaporator 6, and judging how to adjust the frequency of the compressor 7 accordingly. This allows for more precise adjustment of the compressor 7, preventing abnormal noise and saving energy consumption of the compressor 7.

[0109] In some embodiments, the step of controlling the state of compressor 7 according to the relationship between the first temperature rise rate and the second temperature rise rate includes:

[0110] If the first temperature rise rate is greater than the second temperature rise rate, increase the operating frequency of compressor 7;

[0111] If the first temperature rise rate is not greater than the second temperature rise rate, the compressor 7 shall maintain the current frequency of operation.

[0112] In this embodiment, it is determined that the refrigerant in the system has not yet reached a significant cooling capacity, and there is no urgent need to stop the compressor 7. However, the first temperature of the evaporator 6 continues to rise rapidly, and the evaporator 6 will also produce a large amount of gaseous refrigerant entering the receiver 1. If the second temperature is higher than the second preset temperature, it indicates that the large amount of gaseous refrigerant entering the receiver 1 is not easily converted into liquid refrigerant 4. Based on this, if the first temperature rise rate is greater than the second temperature rise rate, it indicates that the gaseous refrigerant production rate is relatively fast. Increasing the operating frequency of the compressor 7 can increase the refrigerant suction volume and prevent the formation of a large amount of liquid refrigerant in the receiver 1. If the first temperature rise rate is not greater than the second temperature rise rate, it indicates that the rate at which the liquid refrigerant in the receiver 1 is converted into gaseous refrigerant is greater than the accumulation rate of refrigerant from the evaporator 6 in the receiver 1. This allows the compressor 7 to maintain its current operating frequency, which can both maintain the current refrigerant suction rate and save energy.

[0113] In some embodiments, the control method includes:

[0114] After the defrosting stage begins, compressor 7 is started for a preset time.

[0115] For example, the frequency and duration of compressor 7 operation can be determined based on the specific amount of refrigerant and the volume of receiver 1.

[0116] In this embodiment, after the defrosting stage begins, the compressor 7 is first turned on for a preset time so that at least part of the liquid refrigerant previously stored in the receiver 1 is circulated into the compressor 7 before entering the process of controlling the working state of the compressor 7 according to temperature-related parameters. This can further reduce the risk of the liquid refrigerant 4 in the receiver 1 exceeding the inner end of the refrigerant inlet pipe 2 during the defrosting process and reduce abnormal noise during the defrosting process.

[0117] In some embodiments, the control method further includes:

[0118] After defrosting is complete, stop compressor 7 from running.

[0119] In this embodiment, after defrosting is completed, there is no need to eliminate abnormal noises, so the compressor 7 stops running, which can save the energy consumption of the compressor 7.

[0120] refer to Figure 6 The following are some specific embodiments of the control method for eliminating abnormal noise from the reservoir during defrosting, as disclosed in this disclosure. The specific control method is described below.

[0121] After the defrosting stage begins, the first temperature T1 of the evaporator 6 and the second temperature T2 of the liquid receiver 1 are obtained, and the first temperature rise rate N1 and the second temperature rise rate N2 are calculated based on the first temperature T1 and the second temperature T2.

[0122] Next, it is determined whether the compressor 7 is turned on. If it is in the off state, it is first determined whether the first temperature T1 is less than or equal to the first preset temperature T01, that is, whether T1≤T0. If not, it is further determined whether the first temperature rise rate N1 is greater than the preset temperature rise rate N0, that is, whether N1>N0. If so, the first temperature T1 and the second temperature T2 are continuously obtained. If the first temperature rise rate N1 is greater than the preset temperature rise rate N0, the compressor 7 is started and runs at a lower frequency. Otherwise, the first temperature T1 and the second temperature T2 are continuously obtained.

[0123] If compressor 7 is running, first determine whether the first temperature T1 is less than or equal to the first preset temperature T0, i.e., whether T1 ≤ T01. If T1 ≤ T01, then reduce the operating frequency of compressor 7. If T1 > T01, then further determine whether the second temperature rise rate N2 is less than zero, i.e., whether N2 < 0.

[0124] If N2 < 0, then reduce the operating frequency of compressor 7.

[0125] If N2 ≥ 0, then continue to determine the relationship between the current first temperature rise rate N1 and the preset temperature rise rate N0:

[0126] If N1 < 0, then reduce the operating frequency of compressor 7;

[0127] If 0≤N1≤N0, then compressor 7 should maintain its current operating frequency;

[0128] If N1 > N0, then further determine whether T2 ≤ T02. If T2 ≤ T02, then increase the operating frequency of compressor 7. If T2 > T02, then determine whether N1 > N2. If yes, then increase the operating frequency of compressor 7. Otherwise, keep compressor 7 at its current operating frequency.

[0129] While the compressor 7 is running, it continuously checks whether the defrosting heater has stopped working. If it has, the compressor 7 stops working and the defrosting process ends; otherwise, it continues to obtain the first temperature T1 and the second temperature T2.

[0130] For example, the first preset temperature can be the refrigerant evaporation temperature, and the preset temperature rise rate can be determined based on factors such as the equipment model, the volume of the liquid receiver 1, the type of refrigerant, and the defrosting power.

[0131] The embodiments of this disclosure monitor the first temperature T1 of the evaporator 6 and the second temperature T2 of the liquid receiver 1 in real time, and can adjust the operating frequency of the compressor 7 accordingly, thereby changing the power of the compressor 7, and can achieve the purpose of eliminating abnormal noise with lower power consumption.

[0132] This solution does not change the overall structure of the liquid receiver and system. Instead, it eliminates the problem of abnormal noise during defrosting through logic control. Therefore, it can be widely used in refrigeration appliances with defrosting function and liquid receiver.

[0133] The control method described in the above embodiments can be executed by a control device. This disclosure also provides a control device, including a memory and a processor coupled to the memory. The processor is configured to execute the control method for eliminating abnormal noise from the reservoir during defrosting, as described in the above embodiments, based on instructions stored in the memory. For example, the control device is a controller.

[0134] In addition, such as Figure 5 As shown, this disclosure provides a refrigeration system, including:

[0135] Compressor 7 has an air intake 71;

[0136] Evaporator 6 has a refrigerant inlet 61 and a refrigerant outlet 62, with the refrigerant outlet 62 connected to the suction port 71;

[0137] A receiver 1 is located between the evaporator 6 and the compressor 7. The receiver 1 has a refrigerant inlet pipe 2 and a refrigerant outlet pipe 3. The refrigerant inlet pipe 2 is connected to the refrigerant outlet 62, and the refrigerant outlet pipe 3 is connected to the suction port 71.

[0138] The control device described in the above embodiments.

[0139] Furthermore, the refrigeration system also includes a condenser 9, which is connected between the compressor's discharge port 72 and the refrigerant inlet 61 of the evaporator 6. Thus, the evaporator 6, the receiver 1, the compressor 7, and the condenser 9 are connected in series to form the refrigerant circulation loop of the refrigeration system.

[0140] In the refrigeration system of this embodiment, the control device can determine the amount of gaseous refrigerant generated in the evaporator 6 by using a first temperature to determine whether a large amount of gaseous refrigerant will enter the liquid receiver 1. A second temperature can determine whether a large amount of gaseous refrigerant will condense into liquid refrigerant. Therefore, when it is determined that a large amount of liquid refrigerant will be generated in the liquid receiver 1, the compressor 7 is started in a timely manner or its operating frequency is increased to promptly convert the liquid refrigerant in the liquid receiver 1 into gas, thereby reducing the problem of abnormal noise from the liquid receiver 1 during defrosting. Furthermore, when the amount of liquid refrigerant in the liquid receiver 1 decreases to below the inner end of the refrigerant inlet pipe 2 of the liquid receiver 1, the compressor 7 can be stopped or its operating frequency reduced to prevent the system's refrigeration operation from affecting the defrosting effect.

[0141] In some embodiments, the refrigeration system further includes:

[0142] A first temperature sensing element 8 is disposed on the evaporator 6 and configured to detect the temperature of the evaporator 6; and

[0143] The second temperature detection component 5 is provided on the liquid reservoir 1 and is configured to detect the temperature of the liquid reservoir 1.

[0144] This embodiment can detect the temperature of the refrigerant in the evaporator 6 by setting a first temperature detection component 8 on the evaporator 6 and the temperature of the liquid receiver 1 by setting a second temperature detection component 5 on the liquid receiver 1. This provides an accurate basis for eliminating abnormal noise in the liquid receiver during the defrosting process, thereby better eliminating abnormal noise.

[0145] In some embodiments, such as Figure 4 As shown, the reservoir 1 is tilted, and the second temperature detection component 5 is located on the downward-facing side wall of the reservoir 1, and is located in the lower middle region along the height direction of the reservoir 1.

[0146] For example, reservoir 1 is cylindrical.

[0147] In this embodiment, the liquid receiver 1 is tilted, which optimizes the flow, separation and discharge of the refrigerant. Since the liquid refrigerant 4 is located in the area at the bottom of the liquid receiver 1, the second temperature detection component 5 is placed on the downward-facing side wall of the liquid receiver 1, which can more accurately detect the temperature of the liquid refrigerant 4, so as to more accurately determine the temperature of the refrigerant in the liquid receiver 1, and prevent large fluctuations in the temperature of the gaseous refrigerant in the upper area, thereby providing an accurate basis for the state control of the compressor 7.

[0148] In addition, this disclosure provides a computer-readable storage medium storing computer instructions, which are executed by a processor as described above in the control method for eliminating abnormal noise from the reservoir during defrosting.

[0149] In addition, this disclosure provides a computer program product, including a computer program that, when executed by a processor, implements a control method for eliminating abnormal noise from the reservoir during defrosting as described in the above embodiments.

[0150] The foregoing has provided a detailed description of a control method, control device, and refrigeration system for eliminating abnormal noise from the liquid receiver during defrosting, as disclosed in this disclosure. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. These embodiments are merely illustrative and are intended to aid in understanding the method and its core concepts. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this disclosure.

Claims

1. A control method for eliminating abnormal noise from a liquid reservoir during defrosting, characterized in that, include: After the defrosting stage begins, temperature-related parameters in the refrigeration system are obtained, including the first temperature of the evaporator (6) and the second temperature of the liquid receiver (1). The working state of the compressor (7) is controlled according to the temperature-related parameters to slow down the accumulation of liquid refrigerant inside the liquid receiver (1) during the defrosting process.

2. The control method for eliminating abnormal noise from the reservoir during defrosting according to claim 1, characterized in that, Also includes: Calculate the first temperature rise rate and the second temperature rise rate based on the first temperature and the second temperature, respectively; The temperature-related parameters further include the first temperature rise rate and the second temperature rise rate; wherein the first temperature rise rate is the rate of change of the first temperature over time, and the second temperature rise rate is the rate of change of the second temperature over time.

3. The control method for eliminating abnormal noise from the reservoir during defrosting according to claim 2, characterized in that, If the compressor (7) is in a stopped state, controlling the working state of the compressor (7) according to the temperature-related parameters specifically includes: When the first temperature is greater than the first preset temperature and the first temperature rise rate is greater than the preset temperature rise rate, the compressor (7) is started.

4. The control method for eliminating abnormal noise from the reservoir during defrosting according to claim 2, characterized in that, If the compressor (7) is in the start-up state, controlling the working state of the compressor (7) according to the temperature-related parameters specifically includes: When the first temperature is less than or equal to the first preset temperature, reduce the operating frequency of the compressor (7); and / or When the first temperature is greater than the first preset temperature and the second temperature rise rate is less than zero, the operating frequency of the compressor (7) is reduced.

5. The control method for eliminating abnormal noise from the reservoir during defrosting according to claim 2, characterized in that, If the compressor (7) is in the start-up state, controlling the working state of the compressor (7) according to the temperature-related parameters specifically includes: When the first temperature is greater than the first preset temperature and the second temperature rise rate is not less than zero, the working state of the compressor (7) is controlled according to the relationship between the first temperature rise rate and the preset temperature rise rate.

6. The control method for eliminating abnormal noise from the reservoir during defrosting according to claim 5, characterized in that, The steps for controlling the operating state of the compressor (7) based on the relationship between the first temperature rise rate and the preset temperature rise rate include: When the first temperature rise rate is less than zero, reduce the operating frequency of the compressor (7); and / or Under the condition that the first temperature rise rate is not less than zero and not greater than the preset temperature rise rate, the compressor (7) is kept running at the current frequency; and / or When the first temperature rise rate is greater than the preset temperature rise rate, the state of the compressor (7) is controlled according to the relationship between the second temperature and the second preset temperature.

7. The control method for eliminating abnormal noise from the reservoir during defrosting according to claim 6, characterized in that, The steps for controlling the state of the compressor (7) based on the relationship between the second temperature and the second preset temperature include: When the second temperature is less than or equal to the second preset temperature, increase the operating frequency of the compressor (7); and / or When the second temperature is greater than the second preset temperature, the state of the compressor (7) is controlled according to the relationship between the first temperature rise rate and the second temperature rise rate.

8. The control method for eliminating abnormal noise from the reservoir during defrosting according to claim 7, characterized in that, The steps of controlling the state of the compressor (7) according to the relationship between the first temperature rise rate and the second temperature rise rate include: When the first temperature rise rate is greater than the second temperature rise rate, the operating frequency of the compressor (7) is increased; If the first temperature rise rate is not greater than the second temperature rise rate, the compressor (7) is kept running at the current frequency.

9. The control method for eliminating abnormal noise from the reservoir during defrosting according to any one of claims 1 to 8, characterized in that, Also includes: After the defrosting stage begins, the compressor (7) is turned on for a preset time.

10. The control method for eliminating abnormal noise from the reservoir during defrosting according to any one of claims 1 to 8, characterized in that, Also includes: After defrosting is complete, the compressor (7) is stopped.

11. A control device, characterized in that, The device includes a memory and a processor coupled to the memory, the processor being configured to execute, based on instructions stored in the memory, the control method for eliminating reservoir noise during defrosting as described in any one of claims 1-10.

12. A refrigeration system, comprising: The compressor (7) has an air intake (71); The evaporator (6) has a refrigerant outlet (62) connected to the air intake (71); A receiver (1) is disposed between the evaporator (6) and the compressor (7). The receiver (1) has a refrigerant inlet pipe (2) and a refrigerant outlet pipe (3). The refrigerant inlet pipe (2) is connected to the refrigerant outlet (62), and the refrigerant outlet pipe (3) is connected to the suction port (71). The control device according to claim 11.

13. The refrigeration system according to claim 12, characterized in that, Also includes: A first temperature detection component (8) is provided on the evaporator (6) and is configured to detect the temperature of the evaporator (6); and A second temperature detection component (5) is provided on the reservoir (1) and is configured to detect the temperature of the reservoir (1).

14. The refrigeration system according to claim 13, characterized in that, The reservoir (1) is inclined, and the second temperature detection component is located on the downward side wall of the reservoir (1) and in the lower middle region along the height direction of the reservoir (1).

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that are executed by a processor as described in any one of claims 1-10, for the control method of eliminating abnormal noise from the reservoir during defrosting.

16. A computer program product comprising a computer program that, when executed by a processor, implements the control method for eliminating abnormal noise from the reservoir during defrosting as described in any one of claims 1-10.

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