Air conditioning apparatus, and control method, device, storage medium, and program product thereof

Abstract

The application discloses an air conditioning device and a control method, device, storage medium and computer program product thereof. The air conditioning device has a refrigerant circulation system composed of a compressor, a first heat exchanger, a second heat exchanger, a throttling device and a normally open liquid storage device, and is provided with a refrigerant composition adjusting device connected in parallel with the normally open liquid storage device. The method comprises: obtaining the actual environmental conditions of the air conditioning device and the actual exhaust temperature of the compressor under the condition that the air conditioning device is running; and controlling the refrigerant composition adjusting device and / or the throttling device according to the actual environmental conditions of the air conditioning device and the actual exhaust temperature of the compressor, so as to adjust the refrigerant circulation composition and / or the refrigerant circulation amount of the refrigerant circulation system. According to the scheme, the refrigerant composition adjusting device is arranged to adjust the refrigerant circulation composition and / or the refrigerant circulation amount of the air conditioning device, so that the air conditioning device is prevented from frequently starting and stopping, and the comfort experience of the user is improved.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning equipment technology, specifically relating to a control method, device, air conditioning equipment, storage medium, and computer program product for an air conditioning equipment (such as an air conditioner), and particularly to a control method, device, air conditioning equipment, storage medium, and computer program product for a control system (such as an air conditioning refrigeration system) of an air conditioning equipment with multiple liquid reservoirs (such as two or more liquid reservoirs). Background Technology

[0002] When air conditioning equipment (such as air conditioners) is operating under certain conditions, it often does not need too much refrigerant. This is because too much refrigerant will not only cause the system (i.e., the air conditioning control system) to have excessively high pressure and high power consumption, but also easily cause the air conditioning equipment's control system to start and stop frequently, affecting the user's comfort experience.

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

[0004] The purpose of this invention is to provide a control method, device, air conditioning equipment, storage medium, and computer program product for air conditioning equipment, in order to solve the problem that the refrigerant circulation volume of air conditioning equipment (such as air conditioners) cannot be adjusted during operation, resulting in excessive refrigerant in the air conditioning equipment (such as air conditioners) under certain operating conditions, causing frequent system start-ups and shutdowns, and affecting the user's comfort experience. The invention achieves the effect of adjusting the refrigerant circulation composition and / or refrigerant circulation volume of the air conditioning equipment by setting a refrigerant composition adjustment device, thereby avoiding frequent start-ups and shutdowns of the air conditioning equipment and improving the user's comfort experience.

[0005] This invention provides a control method for an air conditioning device. The air conditioning device has a refrigerant circulation system consisting of a compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a normally open liquid receiver. The air conditioning device also has a refrigerant composition regulating device. The refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system. The control method for the air conditioning device includes: acquiring the actual environmental operating conditions of the air conditioning device after it is turned on and running; and acquiring the actual exhaust temperature of the compressor; and controlling the refrigerant composition regulating device, or controlling the refrigerant composition regulating device and the throttling device, based on the actual environmental operating conditions of the air conditioning device and the actual exhaust temperature of the compressor, to regulate the refrigerant circulation composition and / or the refrigerant circulation volume of the refrigerant circulation system.

[0006] In some embodiments, the refrigerant composition regulating device has an adjustable liquid storage device, and the number of adjustable liquid storage devices is one or more; in the refrigerant circulation system, the exhaust port of the compressor returns to the suction port of the compressor after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid storage device; each of the more than one adjustable liquid storage devices is connected in parallel with the normally open liquid storage device; controlling the refrigerant composition regulating device includes: controlling the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, and the running time of at least one of the adjustable liquid storage devices after opening, and executing a preset refrigerant composition regulating mode to regulate the refrigerant circulation composition of the refrigerant circulation system; controlling the throttling device includes: controlling the opening degree of the throttling device to regulate the refrigerant circulation volume of the refrigerant circulation system.

[0007] In some embodiments, each of the more than one adjustable liquid storage devices includes: a liquid storage body, an input valve, a first output valve, and a second output valve; wherein the liquid storage body has an input pipeline, a first output pipeline, and a second output pipeline, the input valve is disposed on the input pipeline of the liquid storage body, the first output valve is disposed on the first output pipeline of the liquid storage body, and the second output valve is disposed on the second output pipeline of the liquid storage body; the device controls the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, as well as the operating time of at least one of the adjustable liquid storage devices after opening, and executes a preset refrigerant composition regulating mode to regulate the refrigerant. The refrigerant circulation composition of the refrigerant circulation system includes: for at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, determining one of the adjustable liquid storage devices that needs to be controlled; controlling the input valve of the adjustable liquid storage device to open and controlling the first output valve of the adjustable liquid storage device to open the adjustable liquid storage device; after the adjustable liquid storage device has been running for a first set time, controlling the input valve of the adjustable liquid storage device to close and controlling the first output valve of the adjustable liquid storage device to close the adjustable liquid storage device, and entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system.

[0008] In some embodiments, in each of the adjustable liquid storage devices, the interior of the liquid storage body is divided into a first part and a second part; entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system includes: for an adjustable liquid storage device that needs to be controlled, determining the refrigerant quantity of the first part of the liquid storage body (i.e., the first part of the liquid storage body's refrigerant quantity) and the refrigerant quantity of the second part of the liquid storage body (i.e., the second part of the liquid storage body's refrigerant quantity) in that adjustable liquid storage device; determining the ratio of the first part of the liquid storage body's refrigerant quantity to the second part of the liquid storage body's refrigerant quantity as the refrigerant mixing ratio of that adjustable liquid storage device; determining the relationship between the refrigerant mixing ratio of that adjustable liquid storage device and a set ratio; if it is determined that the refrigerant mixing ratio of that adjustable liquid storage device is equal to the set ratio, then exiting the preset refrigerant composition adjustment mode to stop adjusting the refrigerant circulation composition of the refrigerant circulation system; if If it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is greater than a set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device equals the set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is closed, exiting the preset refrigerant composition adjustment mode to stop adjusting the refrigerant circulation composition of the refrigerant circulation system; if it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is less than a set ratio, then the second output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device equals the set ratio, then the second output valve of the liquid storage body in the adjustable liquid storage device is closed, exiting the preset refrigerant composition adjustment mode to stop adjusting the refrigerant circulation composition of the refrigerant circulation system.

[0009] In some embodiments, in each of the adjustable liquid storage devices, the liquid storage body has a top inlet and a top outlet, and a bottom outlet; wherein, when the liquid storage body is placed vertically, the input line of the liquid storage body is connected to the top inlet of the liquid storage body, the first output line of the liquid storage body is connected to the top outlet of the liquid storage body, and the second output line of the liquid storage body is connected to the bottom outlet of the liquid storage body.

[0010] In some embodiments, when the refrigerant composition regulating device includes one or more of the adjustable liquid storage devices, the adjustable liquid storage devices include a first liquid storage device; controlling the refrigerant composition regulating device, or controlling the refrigerant composition regulating device and the throttling device, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system according to the actual environmental operating conditions of the air conditioning equipment and the actual discharge temperature of the compressor, includes: determining the degree of environmental condition adjustment of the air conditioning equipment according to the actual environmental operating conditions of the air conditioning equipment, denoted as the first degree of adjustment of the air conditioning equipment; determining whether the first degree of adjustment of the air conditioning equipment is equal to a first set degree; if it is determined that the first degree of adjustment of the air conditioning equipment is not equal to the first set degree, then controlling the refrigerant circulation system to maintain its current operation; if it is determined that the first degree of adjustment of the air conditioning equipment is equal to the first set degree, then controlling the refrigerant composition regulating device, i.e., controlling the first liquid storage device, to initially adjust the refrigerant circulation composition of the refrigerant circulation system; and controlling the throttling device according to the actual discharge temperature of the compressor to initially adjust the refrigerant circulation volume of the refrigerant circulation system.

[0011] In some embodiments, the refrigerant composition regulating device, or the refrigerant composition regulating device and the throttling device, are controlled according to the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. This further includes: after controlling the first liquid receiver to initially adjust the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to initially adjust the refrigerant circulation volume of the refrigerant circulation system, determining the degree of environmental condition adjustment of the air conditioning equipment based on the actual environmental conditions of the air conditioning equipment, denoted as the air conditioning equipment's environmental condition adjustment level. The second adjustment level; determining whether the environmental condition adjustment level of the air conditioning equipment is equal to the second set level, where the second set level is greater than the first set level; if it is determined that the environmental condition adjustment level of the air conditioning equipment is not equal to the second set level, then controlling the refrigerant circulation system to maintain its current operation; if it is determined that the environmental condition adjustment level of the air conditioning equipment is equal to the second set level, then controlling the refrigerant composition adjustment device, i.e., controlling the second liquid storage device, to further adjust the refrigerant circulation composition of the refrigerant circulation system; and controlling the throttling device according to the actual exhaust temperature of the compressor to further adjust the refrigerant circulation volume of the refrigerant circulation system.

[0012] In some embodiments, controlling the throttling device based on the actual discharge temperature of the compressor includes: determining whether the actual discharge temperature of the compressor is within a set discharge temperature range; if the actual discharge temperature of the compressor is within the set discharge temperature range, controlling the refrigerant circulation system to maintain current operation; if the actual discharge temperature of the compressor is not within the set discharge temperature range, controlling the throttling device to adjust the actual discharge temperature of the compressor; determining whether the adjusted actual discharge temperature of the compressor is within the set discharge temperature range; if the adjusted actual discharge temperature of the compressor is within the set discharge temperature range, controlling the refrigerant circulation system to maintain current operation; if the adjusted actual discharge temperature of the compressor is not within the set discharge temperature range, returning to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the adjusted actual discharge temperature of the compressor is within the set discharge temperature range.

[0013] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioning device, the air conditioning device having a refrigerant circulation system consisting of a compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a normally open liquid receiver, the air conditioning device further having a refrigerant composition regulating device; the refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system; the control device for the air conditioning device includes: an acquisition unit configured to acquire the actual environmental operating conditions of the air conditioning device when the air conditioning device is running after being turned on; and to acquire the actual exhaust temperature of the compressor; a control unit configured to control the refrigerant composition regulating device, or control the refrigerant composition regulating device and the throttling device, based on the actual environmental operating conditions of the air conditioning device and the actual exhaust temperature of the compressor, to regulate the refrigerant circulation composition and / or the refrigerant circulation volume of the refrigerant circulation system.

[0014] In some embodiments, the refrigerant composition regulating device has an adjustable liquid storage device, and the number of adjustable liquid storage devices is one or more; in the refrigerant circulation system, the compressor's exhaust port returns to the compressor's suction port after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid storage device; each of the more than one adjustable liquid storage devices is connected in parallel with the normally open liquid storage device; the control unit controls the refrigerant composition regulating device, including controlling the opening and closing of at least one of the adjustable liquid storage devices and the operating time of at least one of the adjustable liquid storage devices after opening, and executing a preset refrigerant composition regulating mode to regulate the refrigerant circulation composition of the refrigerant circulation system; the control unit controls the throttling device, including controlling the opening degree of the throttling device to regulate the refrigerant circulation volume of the refrigerant circulation system.

[0015] In some embodiments, each of the more than one adjustable liquid storage devices includes: a liquid storage body, an input valve, a first output valve, and a second output valve; wherein the liquid storage body has an input pipeline, a first output pipeline, and a second output pipeline, the input valve is disposed on the input pipeline of the liquid storage body, the first output valve is disposed on the first output pipeline of the liquid storage body, and the second output valve is disposed on the second output pipeline of the liquid storage body; the control unit controls the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, and the operating time of at least one of the adjustable liquid storage devices after opening, and executes a preset refrigerant composition adjustment mode to adjust... The refrigerant circulation composition of the refrigerant circulation system includes: for at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, determining one of the adjustable liquid storage devices that needs to be controlled; controlling the input valve of the adjustable liquid storage device to open and controlling the first output valve of the adjustable liquid storage device to open the adjustable liquid storage device; after the adjustable liquid storage device has been running for a first set time, controlling the input valve of the adjustable liquid storage device to close and controlling the first output valve of the adjustable liquid storage device to close the adjustable liquid storage device, and entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system.

[0016] In some embodiments, in each of the adjustable liquid storage devices, the interior of the liquid storage body is divided into a first part and a second part; the control unit enters a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system, including: for an adjustable liquid storage device that needs to be controlled, determining the refrigerant quantity of the first part of the liquid storage body (i.e., the first portion of the liquid storage body's refrigerant quantity) and the refrigerant quantity of the second part of the liquid storage body (i.e., the second portion of the liquid storage body's refrigerant quantity) in that adjustable liquid storage device; determining the ratio of the first portion of the liquid storage body's refrigerant quantity to the second portion of the liquid storage body's refrigerant quantity as the refrigerant mixing ratio of that adjustable liquid storage device; determining the relationship between the refrigerant mixing ratio of that adjustable liquid storage device and a set ratio; if it is determined that the refrigerant mixing ratio of that adjustable liquid storage device is equal to the set ratio, then exiting the preset refrigerant composition adjustment mode to stop adjusting the refrigerant circulation composition of the refrigerant circulation system. If it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is greater than the set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is closed to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system; if it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is less than the set ratio, then the second output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, then the second output valve of the liquid storage body in the adjustable liquid storage device is closed to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system.

[0017] In some embodiments, in each of the adjustable liquid storage devices, the liquid storage body has a top inlet and a top outlet, and a bottom outlet; wherein, when the liquid storage body is placed vertically, the input line of the liquid storage body is connected to the top inlet of the liquid storage body, the first output line of the liquid storage body is connected to the top outlet of the liquid storage body, and the second output line of the liquid storage body is connected to the bottom outlet of the liquid storage body.

[0018] In some embodiments, when the refrigerant composition regulating device includes one or more of the adjustable liquid storage devices, the adjustable liquid storage devices include a first liquid storage device; the control unit controls the refrigerant composition regulating device, or controls the refrigerant composition regulating device and the throttling device, according to the actual environmental operating conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, to regulate the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, including: determining the degree of environmental condition regulation of the air conditioning equipment according to the actual environmental operating conditions of the air conditioning equipment, denoted as the first degree of regulation of the air conditioning equipment; determining whether the first degree of regulation of the air conditioning equipment is equal to a first set degree; if it is determined that the first degree of regulation of the air conditioning equipment is not equal to the first set degree, then controlling the refrigerant circulation system to maintain the current operation; if it is determined that the first degree of regulation of the air conditioning equipment is equal to the first set degree, then controlling the refrigerant composition regulating device, i.e., controlling the first liquid storage device, to initially regulate the refrigerant circulation composition of the refrigerant circulation system; and controlling the throttling device according to the actual exhaust temperature of the compressor, to initially regulate the refrigerant circulation volume of the refrigerant circulation system.

[0019] In some embodiments, the control unit controls the refrigerant composition regulating device, or controls the refrigerant composition regulating device and the throttling device, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system based on the actual environmental operating conditions of the air conditioning equipment and the actual exhaust temperature of the compressor. This further includes: after controlling the first liquid receiver to initially adjust the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to initially adjust the refrigerant circulation volume of the refrigerant circulation system, determining the degree of environmental condition adjustment of the air conditioning equipment based on the actual environmental operating conditions of the air conditioning equipment, denoted as the air conditioning... The equipment has a second adjustment level; it is determined whether the environmental condition adjustment level of the air conditioning equipment is equal to the second set level, and the second set level is greater than the first set level; if it is determined that the environmental condition adjustment level of the air conditioning equipment is not equal to the second set level, the refrigerant circulation system is controlled to maintain its current operation; if it is determined that the environmental condition adjustment level of the air conditioning equipment is equal to the second set level, the refrigerant composition adjustment device is controlled, that is, the second liquid storage device is controlled, to further adjust the refrigerant circulation composition of the refrigerant circulation system; according to the actual exhaust temperature of the compressor, the throttling device is controlled to further adjust the refrigerant circulation volume of the refrigerant circulation system.

[0020] In some embodiments, the control unit controls the throttling device based on the actual discharge temperature of the compressor, including: determining whether the actual discharge temperature of the compressor is within a set discharge temperature range; if the actual discharge temperature of the compressor is within the set discharge temperature range, controlling the refrigerant circulation system to maintain current operation; if the actual discharge temperature of the compressor is not within the set discharge temperature range, controlling the throttling device to adjust the actual discharge temperature of the compressor; determining whether the adjusted actual discharge temperature of the compressor is within the set discharge temperature range; if the adjusted actual discharge temperature of the compressor is within the set discharge temperature range, controlling the refrigerant circulation system to maintain current operation; if the adjusted actual discharge temperature of the compressor is not within the set discharge temperature range, returning to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the adjusted actual discharge temperature of the compressor is within the set discharge temperature range.

[0021] In conjunction with the above-described device, the present invention further provides an air conditioning device, comprising: a control device for the air conditioning device described above.

[0022] In some embodiments, the air conditioning device includes an air conditioner or a dehumidifier.

[0023] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device on which the storage medium is located executes the steps of the control method for the air conditioning device described above.

[0024] In conjunction with the above method, the present invention further provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for the air conditioning equipment described above.

[0025] Therefore, the solution of the present invention is for air conditioning equipment (such as air conditioners, dehumidifiers, etc.) having a compressor, a first heat exchanger (such as an evaporator), a second heat exchanger (such as a condenser), a throttling device (such as a throttling valve), and a normally open liquid receiver (such as a normally open liquid receiver). The compressor's exhaust port returns to the compressor's suction port after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid receiver; a refrigerant composition regulating device (such as a refrigerant circulation volume regulating refrigeration system) is provided, and the refrigerant composition regulating device is connected in parallel with the normally open liquid receiver; the refrigerant composition regulating device has at least one adjustable liquid receiver (such as a first liquid receiver C1 and shut-off valves on its inlet and outlet pipes), and two or more adjustable liquid receivers are connected in parallel with different adjustment degrees; when the air conditioning equipment is in operation... Based on the degree of similarity between the operating environment of the air conditioning equipment and the user-set operating environment (e.g., degree D), the compressor's exhaust temperature (e.g., exhaust temperature T), the operation of the refrigerant composition regulating device (e.g., the opening and closing of at least one adjustable liquid receiver, the running time of each adjustable liquid receiver when open, etc.), or the opening degree of the throttling device, is controlled to adjust the refrigerant circulation volume of the air conditioning equipment. Thus, by setting the refrigerant composition regulating device, the refrigerant circulation composition and / or refrigerant circulation volume of the air conditioning equipment are adjusted, avoiding frequent start-stop of the air conditioning equipment and improving the user's comfort experience.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0027] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0028] Figure 1 This is a schematic flowchart of an embodiment of the control method for the air conditioning equipment of the present invention;

[0029] Figure 2 This is a schematic flowchart of an embodiment of the method of the present invention, which controls at least one of the adjustable liquid storage devices in the refrigerant composition regulating device to regulate the refrigerant circulation composition of the refrigerant circulation system.

[0030] Figure 3 This is a schematic flowchart of an embodiment of the method of the present invention, which adjusts the refrigerant circulation composition of the refrigerant circulation system by entering a pre-set refrigerant composition adjustment mode.

[0031] Figure 4 This is a schematic flowchart of an embodiment of the method of the present invention for initially adjusting the refrigerant circulation components and / or refrigerant circulation volume of the refrigerant circulation system.

[0032] Figure 5 This is a schematic flowchart of an embodiment of the method of the present invention for further adjusting the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system;

[0033] Figure 6 This is a schematic flowchart of an embodiment of the method of the present invention, which controls the throttling device according to the actual exhaust temperature of the compressor.

[0034] Figure 7 This is a schematic diagram of the structure of a control device for an air conditioning equipment according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of a control system (such as an air conditioning refrigeration system) for an air conditioning device with multiple liquid reservoirs (such as two or more liquid reservoirs) according to the present invention;

[0036] Figure 9 This is a schematic flowchart of a control method for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid reservoirs (such as two or more liquid reservoirs) according to the present invention.

[0037] Figure 10 This is a schematic flowchart of the refrigerant component adjustment method in the control method of a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid reservoirs (such as two or more liquid reservoirs) according to the present invention.

[0038] Figure 11 This is a schematic diagram of the refrigerant stratification structure in the control method of a control system (such as an air conditioning refrigeration system) for an air conditioning device with multiple liquid receivers (such as two or more liquid receivers) according to the present invention.

[0039] Figure 12 This is a schematic diagram of the control system corresponding to the control method of the control system of an air conditioning device (such as an air conditioning refrigeration system) with multiple liquid reservoirs (such as two or more liquid reservoirs) according to the present invention.

[0040] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0041] 102 - Acquisition unit; 104 - Control unit. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] Considering that the refrigerant circulation volume cannot be adjusted during the operation of air conditioning equipment (such as air conditioners), excessive refrigerant can lead to frequent start-stop cycles of the control system under certain operating conditions, affecting user comfort. Furthermore, some mixed refrigerants (i.e., refrigerants) are prone to liquid stratification under certain operating conditions, storing in the receiver, resulting in a discrepancy between the actual refrigerant composition and the ideal state. For example, R407C refrigerant (i.e., R-407C mixed refrigerant) is a mixture of R32, R125, and R134a refrigerants in a specific ratio, and is an environmentally friendly refrigerant that does not damage the ozone layer. For the R-407C mixed refrigerant, R-32, R-125, and R-134a refrigerants account for 15%, 40%, and 45% respectively, with condensation temperatures of -26.4℃, -4.4℃, and -26.5℃ respectively. The evaporation and condensation temperatures are different, and R-125 refrigerant has a higher condensation temperature, so more of it is stored in the receiver (i.e., liquid receiver). This causes a change in the composition of the R-407C mixed refrigerant during operation, resulting in a deterioration in the performance of the R-407C mixed refrigerant.

[0044] Especially for fixed-frequency air conditioning control systems, when the actual operating conditions are close to the user-set conditions, the fixed-frequency air conditioner often frequently starts and stops in the originally set mode, resulting in a poor user experience and high power consumption. For example, some control logics stop running the refrigeration system when the operating conditions reach the user-set environmental conditions, thus saving electricity. If the fixed-frequency air conditioning control system uses a mixed refrigerant, liquid stratification may occur in the receiver under certain operating conditions. The actual refrigerant composition of the fixed-frequency air conditioning control system often deviates significantly from the ideal composition. Due to the different refrigerant characteristics, the fixed-frequency air conditioning control system often cannot achieve its optimal state.

[0045] One proposed solution provides an air conditioning system with a variable-capacity liquid storage tank. This system uses a liquid storage tank containing a bladder, connected to a cylinder and piston. Adjusting the piston changes the size of the bladder, thus altering the volume of the liquid storage tank. However, this variable-capacity liquid storage tank system suffers from drawbacks such as complex structure, high precision requirements for components, and inability to adjust for different refrigerant compositions.

[0046] Therefore, the present invention proposes a control method for an air conditioning device (such as an air conditioner). Based on this, the present invention proposes a control method for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers). By changing the refrigerant circulation volume of the air conditioning device's control system and having a simple structure, the method can at least avoid frequent start-stop of the air conditioning device's control system, thereby improving the user's comfort experience.

[0047] According to an embodiment of the present invention, a control method for an air conditioning device is provided, such as... Figure 1 The diagram shows a flow chart of an embodiment of the method of the present invention. The air conditioning equipment has a refrigerant circulation system consisting of a compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a normally open liquid receiver. The air conditioning equipment also has a refrigerant composition regulating device; the refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system. That is, the air conditioning equipment has a compressor, a first heat exchanger, a second heat exchanger, a throttling device, a normally open liquid receiver, and a refrigerant composition regulating device. The compressor, the first heat exchanger, the second heat exchanger, the throttling device, and the normally open liquid receiver constitute the refrigerant circulation system. For example, the compressor's exhaust port returns to the compressor's intake port after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid receiver. The refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system. In the solution of the present invention, as... Figure 1 As shown, the control method of the air conditioning equipment includes steps S110 to S120.

[0048] In step S110, when the air conditioning equipment is running after being turned on, the actual environmental conditions of the air conditioning equipment are obtained, specifically the actual environmental conditions of the environment where the air conditioning equipment is located, and the set environmental conditions of the environment where the air conditioning equipment is located set by the user; and the actual exhaust temperature of the compressor is obtained, and the preset target exhaust temperature of the compressor is obtained.

[0049] In step S120, while the air conditioning equipment is operating, the refrigerant composition regulating device, or the refrigerant composition regulating device and the throttling device, are controlled according to the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. Here, the refrigerant circulation composition of the refrigerant circulation system refers to the composition of the refrigerant participating in the circulation within the refrigerant circulation system, and the amount of refrigerant participating in the circulation within the refrigerant circulation system.

[0050] The present invention proposes a control scheme for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers). The scheme sets up a refrigerant circulation volume adjustment refrigeration system, which can change the refrigerant circulation volume of the air conditioning device control system by adjusting the refrigerant circulation volume. The structure is simple and can also provide a solution to the refrigerant composition problem, at least avoiding frequent start-stop of the air conditioning device control system and improving the user's comfort experience.

[0051] In some embodiments, the refrigerant composition regulating device has an adjustable liquid storage device, and the number of adjustable liquid storage devices is one or more; when the number of adjustable liquid storage devices is two or more, the adjustment degrees of the two or more adjustable liquid storage devices are the same or different. In the refrigerant circulation system, the exhaust port of the compressor returns to the suction port of the compressor after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid storage device; each of the more than one adjustable liquid storage devices is connected in parallel with the normally open liquid storage device.

[0052] In step S120, controlling the refrigerant composition regulating device includes: controlling the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, and the running time of at least one of the adjustable liquid storage devices after opening, and executing a preset refrigerant composition regulating mode to regulate the refrigerant circulation composition of the refrigerant circulation system.

[0053] Accordingly, in step S120, controlling the throttling device includes: controlling the opening degree of the throttling device to adjust the refrigerant circulation volume of the refrigerant circulation system.

[0054] In the present invention, a simple refrigerant circulation regulation refrigeration system is designed to regulate the refrigerant circulation volume and solve the problems of frequent start-stop and excessive power consumption in the control system of air conditioning equipment (such as air conditioning refrigeration system).

[0055] In some embodiments, each of the more than one adjustable liquid storage devices includes: a liquid storage body, an input valve, a first output valve, and a second output valve. The liquid storage body is such as a first liquid storage C1, the input valve is such as a shut-off valve F1, the first output valve is such as a shut-off valve F11, and the second output valve is such as a shut-off valve F12. The liquid storage body has an input pipeline, a first output pipeline, and a second output pipeline. The input valve is disposed on the input pipeline of the liquid storage body, the first output valve is disposed on the first output pipeline of the liquid storage body, and the second output valve is disposed on the second output pipeline of the liquid storage body.

[0056] In step S120, the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, as well as the running time of at least one of the adjustable liquid storage devices after being opened, and the execution of a preset refrigerant composition regulating mode to regulate the refrigerant circulation composition of the refrigerant circulation system are described in the following exemplary description.

[0057] The following is combined with Figure 2 The schematic diagram shown is a flowchart of an embodiment of the method of the present invention, which controls at least one of the adjustable liquid storage devices in the refrigerant composition regulating device to regulate the refrigerant circulation composition of the refrigerant circulation system. The specific process of controlling at least one of the adjustable liquid storage devices in the refrigerant composition regulating device to regulate the refrigerant circulation composition of the refrigerant circulation system in step S120 is further explained, including steps S210 to S230.

[0058] Step S210: For at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, determine one of the adjustable liquid storage devices that needs to be controlled at present; wherein, the adjustable liquid storage device that needs to be controlled at present can be any one of the at least one adjustable liquid storage devices, or it can be an adjustable liquid storage device selected according to a preset selection rule.

[0059] Step S220: Control the input valve of the adjustable liquid storage device to open and control the first output valve of the adjustable liquid storage device to open, so as to control the adjustable liquid storage device to open.

[0060] Step S230: After controlling the opening of one of the adjustable liquid storage devices, and after the adjustable liquid storage device has been running for a first set time, the input valve of the adjustable liquid storage device is closed, and the first output valve of the adjustable liquid storage device is closed, thereby controlling the adjustable liquid storage device to close and entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system. The first set time is, for example, t0min.

[0061] Figure 9 This is a flowchart illustrating a control method for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid reservoirs (such as two or more liquid reservoirs) according to the present invention. Figure 9 This invention can demonstrate a refrigeration system control method. Figure 9In this context, D represents the degree of proximity between the environmental operating conditions and the user-defined environmental operating conditions. For example, if the environmental operating condition is A when the unit is first turned on, the user-defined environmental operating condition is C, and the environmental operating condition during operation of the air conditioning equipment's control system (such as an air conditioning refrigeration system) is B, then D = (AB) / (AC), which can be expressed as a percentage. The closer to 1, the closer the environmental operating conditions are to the user-defined environmental operating conditions. P and Q are two different degrees, with Q being higher than P. T represents the actual exhaust temperature of the compressor during the actual operation of the air conditioning equipment's control system (such as an air conditioning refrigeration system). T1 represents the optimal exhaust temperature value for the air conditioning equipment's control system (such as an air conditioning refrigeration system) under this refrigeration system. T1 is generally set manually in advance according to the system configuration. t0 represents the duration for which the air conditioning equipment's control system (such as an air conditioning refrigeration system) needs to run after opening the valve of either of the two liquid receivers (i.e., the first liquid receiver C1 and the second liquid receiver C2). F1, F11, F2, and F21 are the shut-off valve numbers, corresponding to... Figure 8 The corresponding shut-off valve in the system. For T1, the optimal discharge temperature range varies depending on the refrigerant. For example, the optimal discharge temperature for R410A refrigerant is generally 80~100°C, while for R407C it is usually recommended to control the optimal discharge temperature between 100°C and 130°C. t0 refers to the refrigerant stabilization time in the receiver tank. The reasonable range for t0 varies for different air conditioning systems. Generally, for dehumidifiers or small household air conditioners, 3-6 minutes is sufficient, while for medium-sized air conditioning systems, 10-20 minutes is recommended.

[0062] In the solution of this invention, see Figure 8 and Figure 9 The example shown employs a simple refrigerant circulation regulation refrigeration system, which solves the problem of frequent start-stop of the control system of air conditioning equipment (such as air conditioning refrigeration system). It can change the refrigerant circulation of the control system of air conditioning equipment and has a simple structure, so as to at least avoid the frequent start-stop of the control system of air conditioning equipment and improve the user's comfort experience.

[0063] In some embodiments, in each of the adjustable liquid storage devices, the interior of the liquid storage body is divided into a first part and a second part; when the liquid storage body is placed vertically, the first part is the upper part and the second part is the lower part.

[0064] The specific process of entering the preset refrigerant composition adjustment mode in step S230 to adjust the refrigerant circulation composition of the refrigerant circulation system is described in the following exemplary description.

[0065] The following is combined with Figure 3The diagram illustrates an embodiment of the method of the present invention, which involves entering a pre-set refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system. It further explains the specific process of entering the pre-set refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system in step S230, including steps S310 to S360.

[0066] Step S310: For one of the adjustable liquid storage devices that needs to be controlled, after controlling the adjustable liquid storage device to be closed, determine the refrigerant quantity of the first part of the liquid storage body of the adjustable liquid storage device, i.e., the first part of the refrigerant quantity of the liquid storage body, and the refrigerant quantity of the second part of the liquid storage body, i.e., the second part of the refrigerant quantity of the liquid storage body; wherein, the first part of the refrigerant quantity of the liquid storage body is refrigerant quantity u, and the second part of the refrigerant quantity of the liquid storage body is refrigerant quantity v.

[0067] Step S320: The ratio of the first part of the refrigerant quantity in the liquid storage body and the second part of the refrigerant quantity in the liquid storage body of the adjustable liquid storage device is determined as the refrigerant mixing ratio of the adjustable liquid storage device.

[0068] Step S330: Determine the relationship between the refrigerant mixing ratio of the adjustable liquid storage device and the set ratio; wherein, the set ratio is, for example, ratio i.

[0069] Step S340: If it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, then exit the preset refrigerant composition adjustment mode to stop adjusting the refrigerant circulation composition of the refrigerant circulation system.

[0070] Step S350: If it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is greater than the set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is closed to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system.

[0071] Step S360: If it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is less than the set ratio, then the second output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, then the second output valve of the liquid storage body in the adjustable liquid storage device is closed to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system.

[0072] Figure 10 This is a schematic flowchart of the refrigerant component adjustment method in the control method of a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers) according to the present invention. Figure 10 It can display the refrigerant component adjustment method. Figure 10 In this context, u represents the upper refrigerant composition in the receiver (i.e., either the first receiver C1 or the second receiver C2), v represents the lower refrigerant composition in the receiver (i.e., either the first receiver C1 or the second receiver C2), u / v represents the refrigerant composition ratio (i.e., the ratio of the upper refrigerant composition to the lower refrigerant composition in either the first receiver C1 or the second receiver C2), and i represents the optimal value of the refrigerant composition ratio. Fx1 represents the valve for the upper refrigerant in the first receiver C1 or the second receiver C2 (F11 for the first receiver C1, F21 for the second receiver C2), and Fx2 represents the valve for the lower refrigerant in the first receiver C1 or the second receiver C2 (F12 for the first receiver C1, F22 for the second receiver C2).

[0073] In the solution of this invention, see Figure 10 The example shown illustrates how, with respect to mixed refrigerants, the refrigerant circulation rate and the operating composition of the mixed refrigerant can be adjusted through the refrigerant stratification phenomenon in the receiver tank to achieve an optimal state.

[0074] In some embodiments, in each of the adjustable liquid storage devices, when the liquid storage body is placed vertically, the liquid storage body has a top inlet, a top outlet, and a bottom outlet; wherein, when the liquid storage body is placed vertically, the input pipe of the liquid storage body is connected to the top inlet of the liquid storage body, the first output pipe of the liquid storage body is connected to the top outlet of the liquid storage body, and the second output pipe of the liquid storage body is connected to the bottom outlet of the liquid storage body. That is, when the liquid storage body is placed vertically, the liquid storage body has a top inlet, a top outlet, and a bottom outlet, the input pipe enters to the top inlet of the liquid storage body (e.g., the input pipe connects to the top inlet of the liquid storage body from the pipe between the first heat exchanger and the normally open liquid storage body), the first output pipe exits from the top outlet of the liquid storage body to the exhaust port of the compressor, and the second output pipe exits from the bottom outlet of the liquid storage body to the exhaust port of the compressor.

[0075] Figure 8 This is a schematic diagram of the structure of a control system (such as an air conditioning refrigeration system) for an air conditioning device with multiple liquid reservoirs (such as two or more liquid reservoirs) according to the present invention. Figure 8 The present invention can be described as a refrigeration system that, in addition to the four main components of the refrigeration system (i.e., compressor, evaporator, condenser, expansion valve) and a normally open liquid receiver, also includes two additional liquid receivers (i.e., first liquid receiver C1 and second liquid receiver C2). The two additional liquid receivers (i.e., the first liquid receiver C1 and the second liquid receiver C2) are used to regulate the refrigerant circulation volume of the system. When the mixed liquid refrigerant is layered in the two additional liquid receivers (i.e., the first liquid receiver C1 and the second liquid receiver C2), each liquid receiver is connected to pipes and valves at the upper and lower parts. For example, shut-off valves F1 and F11 are installed on the upper connecting pipe of the first liquid receiver C1, and shut-off valve F12 is installed on the lower connecting pipe of the first liquid receiver C1; shut-off valves F2 and F21 are installed on the upper connecting pipe of the second liquid receiver C2, and shut-off valve F22 is installed on the lower connecting pipe of the second liquid receiver C2. These are used to replenish the refrigerant components in operation through the first liquid receiver C1 and the second liquid receiver C2, so that the refrigerant composition in operation is optimal.

[0076] The adjustment of the refrigerant circulation volume and refrigerant composition requires the use of the first liquid receiver C1 and the second liquid receiver C2. The shut-off valves F1, F11, and F12 are used together with the first liquid receiver C1, while the shut-off valves F2, F21, and F22 are used together with the second liquid receiver C2.

[0077] Figure 11This is a schematic diagram of the refrigerant stratification structure in the control method of a control system (such as an air conditioning refrigeration system) for an air conditioning device with multiple liquid receivers (such as two or more liquid receivers) according to the present invention. Figure 11 It can display the refrigerant stratification in the receiver (i.e., either the first receiver C1 or the second receiver C2).

[0078] Figure 12 This is a schematic diagram of the control system corresponding to the control method of the control system of an air conditioning device (such as an air conditioning refrigeration system) with multiple liquid reservoirs (such as two or more liquid reservoirs) according to the present invention. Figure 12 The diagram shows the control system, which consists of a data acquisition module, a calculation module, and a control module.

[0079] The refrigerant circulation volume regulation refrigeration system proposed in this invention, through the adjustment of the composition of the mixed refrigerant (i.e., the adjustment of the mixed refrigerant components), and its simple structure and closed-loop control logic, can adjust the refrigerant circulation volume of the refrigeration system and regulate the composition of the mixed refrigerant. Moreover, it has a simple structure and does not require too many precision parts.

[0080] In some embodiments, when the refrigerant composition regulating device includes one or more of the adjustable liquid storage devices, the one or more of the adjustable liquid storage devices include a first liquid storage device; the first liquid storage device includes a first liquid reservoir C1, a shut-off valve F1, a shut-off valve F11, and a shut-off valve F12.

[0081] Step S120 involves controlling the refrigerant composition regulating device, or controlling the refrigerant composition regulating device and the throttling device, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. This includes the process of initially adjusting the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system.

[0082] The following is combined Figure 4 The schematic diagram shown is a flowchart of an embodiment of the method of the present invention for initially adjusting the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system. It further illustrates the specific process of initially adjusting the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system in step S120, including steps S410 to S450.

[0083] Step S410: Based on the actual environmental conditions of the air conditioning equipment, determine the degree of environmental condition adjustment of the air conditioning equipment, which is denoted as the first degree of adjustment of the air conditioning equipment. For example, the environmental conditions obtained for the first time are close to the environmental conditions set by the user by a certain degree D. Specifically, the actual environmental conditions of the air conditioning device obtained when the air conditioning device starts running are recorded as the initial environmental conditions of the air conditioning device, and the actual environmental conditions of the air conditioning device obtained after the air conditioning device has been running for a second set time are recorded as the current environmental conditions of the air conditioning device; the absolute value of the difference between the initial environmental conditions and the current environmental conditions of the air conditioning device is recorded as the first condition difference, and the absolute value of the difference between the initial environmental conditions and the set environmental conditions of the air conditioning device is recorded as the second condition difference. The ratio of the first condition difference to the second condition difference is used as the degree to which the actual environmental conditions of the air conditioning device are close to the set environmental conditions of the air conditioning device, and is recorded as the environmental condition adjustment degree of the air conditioning device, specifically as the first adjustment degree of the air conditioning device, such as the degree of closeness D of the environmental conditions initially determined to be close to the user-set environmental conditions; wherein, the initial environmental conditions of the air conditioning device are like condition A, the current environmental conditions of the air conditioning device are like condition B, and the set environmental conditions of the air conditioning device are like condition C.

[0084] Step S420: Determine whether the first adjustment level of the air conditioning device is equal to the first set level; wherein, the first set level is level P.

[0085] Step S430: If it is determined that the first adjustment level of the air conditioning device is not equal to the first set level, then control the refrigerant circulation system to maintain the current operation.

[0086] Step S440: If it is determined that the first adjustment level of the air conditioning equipment is equal to the first set level, then control the refrigerant composition adjustment device, that is, control the first liquid storage device, to initially adjust the refrigerant circulation composition of the refrigerant circulation system.

[0087] Step S450: After controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system, the throttling device is controlled according to the actual exhaust temperature of the compressor to initially adjust the refrigerant circulation volume of the refrigerant circulation system.

[0088] The following is combined with Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 The example shown is a dual-refrigerant mixed refrigerant system. For example, the specific implementation of the solution of the present invention will be described by way of example. The number of receivers does not necessarily correspond to the amount of refrigerant components in the mixture. A larger number of receivers simply allows for more precise and detailed regulation, and has no direct relation to the amount of refrigerant components.

[0089] like Figure 9 As shown, a control method for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers) includes:

[0090] Step 11: The air conditioner is running normally. Then proceed to step 12.

[0091] Step 12: During initial operation (before the prototype runs), the environmental condition is A, the user-defined environmental condition is C, and during prototype operation, the environmental condition is B. Then, D = (AB) / (AC) represents the degree to which the environmental condition closely approximates the user-defined environmental condition. The closer D is to 1, the closer the environmental condition is to the user-defined environmental condition. Determine if D = P is satisfied: if yes, proceed to step 13; otherwise, return to step 11 (i.e., control the air conditioner to continue operating in the original mode). A, B, and C refer to the same parameter, such as temperature or humidity, which can be obtained through the machine's built-in sensors.

[0092] Step 13: If D=P is satisfied, then proceed to step 14.

[0093] Step 14: When D=P (P is preferably 40%~60%), it means that the environmental conditions have been adjusted to a certain stage. The amount of refrigerant circulating can be appropriately reduced to reduce system power consumption. Then proceed to step 15.

[0094] Therefore, in step 14, if D=P is satisfied, then shut-off valves F1 and F11 are opened, allowing some refrigerant from the refrigerant circulation system to enter the first receiver C1. After running for t0 minutes (the longer t0 is, the more refrigerant enters the first receiver C1; t0 is preferably 3-6 minutes), shut-off valves F1 and F11 are closed, entering the refrigerant component adjustment system, i.e., entering the refrigerant composition adjustment mode, to adjust the optimal refrigerant component ratio. In the refrigerant composition adjustment mode, the specific operations all revolve around the optimal refrigerant component ratio i (i.e., the ratio that maximizes the refrigerant's performance). For details, please refer to [link to relevant documentation]. Figure 10 The example shown.

[0095] like Figure 10 As shown, the refrigerant component adjustment method includes:

[0096] Step 31: With shut-off valves F1 and F11 open, allowing some refrigerant from the refrigerant circulation system to enter the first receiver C1, and after running for t0 minutes, shut-off valves F1 and F11 closed, detect the amount of refrigerant in the upper part of the first receiver C1 (u) and the amount of refrigerant in the lower part (v), and then proceed to step 32.

[0097] In step 14, when the refrigerant enters the refrigerant component adjustment system, the refrigerant condenses and separates into layers. The amount of refrigerant in the upper layer (u) and the amount of refrigerant in the lower layer (v) are obtained through the upper and lower ports respectively, and then sent to the system. Specifically, the liquid refrigerant components in the first receiver C1 separate into layers, with the amount of refrigerant in the upper layer of the first receiver C1 being u and the amount of refrigerant in the lower layer of the first receiver C1 being v.

[0098] Step 32: Then determine if u / v = i (where i represents the optimal mixing ratio of the refrigerant; the optimal mixing ratio varies for different refrigerants, and i can be determined based on the actual situation, taking a range of values): If yes, the refrigerant component adjustment system can be exited, because the optimal ratio has been reached, so no further adjustment is needed. If not, proceed to step 33 to determine if u / v is greater than i. i is not necessarily a range; for example, for mixed refrigerant R410A, the optimal value of i is 50%.

[0099] Step 33: Determine if u / v > i: If yes, it means the stored amount of u is too large. The shut-off valve F11 needs to be opened to release some of the upper refrigerant into the system until u / v = i. Then, close the shut-off valve F11 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed. Similarly, if no, open the shut-off valve F12 to release some of the lower refrigerant into the system until u / v = i. Then, close the shut-off valve F12 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed.

[0100] In the solution of this invention, see Figure 8 , Figure 9 and Figure 10 The example shown illustrates how, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device, or the refrigerant composition regulating device and the throttling device, can be controlled to initially adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. This solves the problem of compositional changes in the mixed refrigerant during operation, i.e., it solves the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state. It enables the mixed refrigerant to maintain its original composition during operation, thereby improving the effect of the mixed refrigerant.

[0101] In some embodiments, step S120, which involves controlling the refrigerant composition regulating device or the refrigerant composition regulating device and the throttling device based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, further includes a process of further adjusting the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system.

[0102] The following is combined Figure 5The schematic diagram shows an embodiment of the method of the present invention for further adjusting the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system. It further illustrates the specific process of further adjusting the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system in step S120, including steps S510 to S550.

[0103] Step S510: After controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to initially adjust the refrigerant circulation volume of the refrigerant circulation system, the degree of environmental condition adjustment of the air conditioning equipment is determined according to the actual environmental conditions of the air conditioning equipment, and recorded as the second degree of adjustment of the air conditioning equipment. For example, the degree of closeness D between the obtained environmental conditions and the user-set environmental conditions is determined again. Specifically, the actual environmental conditions of the air conditioning equipment obtained when the air conditioning equipment starts running are recorded as the initial environmental conditions of the air conditioning equipment, and the actual environmental conditions of the air conditioning equipment obtained after the air conditioning equipment has been running for a third set time are recorded as the current environmental conditions of the air conditioning equipment; the absolute value of the difference between the initial environmental conditions and the current environmental conditions of the air conditioning equipment is recorded as the first condition difference, and the absolute value of the difference between the initial environmental conditions and the set environmental conditions of the air conditioning equipment is recorded as the second condition difference. The ratio of the first operating condition difference to the second operating condition difference is taken as the degree to which the actual environmental operating condition of the air conditioning device is far from the set environmental operating condition of the air conditioning device, and is denoted as the environmental operating condition adjustment degree of the air conditioning device, specifically as the second adjustment degree of the air conditioning device. For example, the obtained environmental operating condition is determined to be close to the user-set environmental operating condition by a degree D. Wherein, the initial environmental operating condition of the air conditioning device is such as operating condition A, the current environmental operating condition of the air conditioning device is such as operating condition B, the set environmental operating condition of the air conditioning device is such as operating condition C, and the third set time is greater than the second set time.

[0104] Step S520: Determine whether the environmental condition adjustment level of the air conditioning device is equal to the second set level, wherein the second set level is greater than the first set level; wherein the second set level is as shown in level Q.

[0105] Step S530: If it is determined that the environmental condition adjustment level of the air conditioning equipment is not equal to the second set level, then the refrigerant circulation system is controlled to maintain the current operation.

[0106] Step S540: If it is determined that the environmental condition adjustment level of the air conditioning equipment is equal to the second set level, then control the refrigerant composition adjustment device, that is, control the second liquid storage device, to further adjust the refrigerant circulation composition of the refrigerant circulation system.

[0107] Step S550: After controlling the second liquid storage device to further adjust the refrigerant circulation composition of the refrigerant circulation system, the throttling device is controlled according to the actual exhaust temperature of the compressor to further adjust the refrigerant circulation volume of the refrigerant circulation system.

[0108] like Figure 9 As shown, a control method for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers) further includes:

[0109] Step 15: After entering the refrigerant component adjustment system in step 14 and adjusting the refrigerant components, exit the refrigerant component adjustment system and then determine whether T∈T1 is satisfied: if yes, proceed to step 17; otherwise, proceed to step 16. T represents the compressor discharge temperature in the system, and T1 represents the optimal discharge temperature under the system (the optimal value is different for different systems and different refrigerants; for example, for R410A, it is generally taken as 80℃~100℃).

[0110] Step 16: Determine if T∈T1 is satisfied: If not, it indicates insufficient refrigerant circulation, resulting in excessively high compressor discharge temperature. The throttle valve opening needs to be adjusted accordingly to lower the compressor discharge temperature until T∈T1 is satisfied. Then, proceed to step 17 to continue operation in the current state. For example, a common throttle valve is an electronic expansion valve, whose opening is controlled by a signal. If the discharge temperature is too high, the opening is increased to increase refrigerant circulation and lower the discharge temperature.

[0111] Step 17: If the determination is yes, the system can continue operating in the current state, and then proceed to step 18. In this way, by controlling the compressor's exhaust temperature to prevent it from becoming too high, the compressor can be ensured to operate in an optimal state.

[0112] Step 18: Then proceed to determine whether D equals Q (Q is generally preferred to be 10%~20%, this range is generally close to the user-set environmental conditions, only a portion of the refrigerant needs to be used to run, so that the operating conditions gradually approach the set environmental conditions, which can avoid frequent start-stop of the prototype and reduce power consumption): If not, return to step 17 to continue running in the current state; if yes, execute step 19 to continue adjusting the optimal refrigerant component ratio.

[0113] Step 19: Further open shut-off valves F2 and F21 to allow the second receiver C2 to store some refrigerant. That is, open shut-off valves F2 and F21 to allow some refrigerant from the refrigerant circulation system to enter the second receiver C2. Run for t0 minutes (the longer t0, the more refrigerant enters the second receiver C2; t0 is preferably 3-6 minutes). Then close shut-off valves F2 and F21 to enter the refrigerant composition adjustment system, i.e., enter the refrigerant composition adjustment mode. Adjust the optimal refrigerant component ratio, and then proceed to step 20. In the refrigerant composition adjustment mode, all specific operations revolve around the optimal refrigerant component ratio i (i.e., the ratio that maximizes refrigerant performance). For details, please refer to [link to relevant documentation]. Figure 10 The example shown.

[0114] Continue as Figure 10 As shown, the refrigerant component adjustment method also includes:

[0115] Step 34: With shut-off valves F2 and F21 open, allowing some refrigerant from the refrigerant circulation system to enter the second receiver C2, and after running for t0 minutes, shut-off valves F2 and F21 closed, detect the amount of refrigerant in the upper part of the second receiver C2 (u) and the amount of refrigerant in the lower part (v), and then proceed to step 35.

[0116] In step 18, when the refrigerant enters the refrigerant component adjustment system, the refrigerant condenses and separates into layers. The amount of refrigerant in the upper layer (u) and the amount of refrigerant in the lower layer (v) are obtained through the upper and lower ports respectively, and then sent to the system. Specifically, the liquid refrigerant components in the second receiver C2 separate into layers, with the amount of refrigerant in the upper layer of the second receiver C2 being u and the amount of refrigerant in the lower layer of the second receiver C2 being v.

[0117] Step 35: Then determine whether u / v = i (i represents the optimal mixing ratio of the refrigerant; the optimal mixing ratio varies for different refrigerants, and i can be determined according to the actual situation, taking a range of values): If yes, the refrigerant component adjustment system can be exited, because the optimal ratio has been reached, so no further adjustment is needed. If not, proceed to step 36 to determine whether u / v is greater than i.

[0118] Step 36: Determine if u / v > i: If yes, it means the stored amount of u is too large. The shut-off valve F21 needs to be opened to release some of the upper refrigerant into the system until u / v = i. Then, close the shut-off valve F21 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed. Similarly, if no, open the shut-off valve F22 to release some of the lower refrigerant into the system until u / v = i. Then, close the shut-off valve F22 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed.

[0119] Step 20: After entering the refrigerant component adjustment system in step 19 and adjusting the refrigerant components, exit the refrigerant component adjustment system and then determine whether T∈T1 is satisfied: if yes, proceed to step 22; otherwise, proceed to step 21. T represents the compressor discharge temperature in the system, and T1 represents the optimal discharge temperature under the system (the optimal value is different for different systems and different refrigerants; for example, for R410A, it is generally taken as 80℃~100℃).

[0120] Step 21: Determine if T∈T1 is satisfied: If not, it indicates insufficient refrigerant circulation, resulting in excessively high compressor discharge temperature. The throttle valve opening needs to be adjusted accordingly to lower the compressor discharge temperature until T∈T1 is satisfied. Then, proceed to step 22 to continue operation in the current state. For example, a common throttle valve is an electronic expansion valve, whose opening is controlled by a signal. If the discharge temperature is too high, the opening is increased to increase refrigerant circulation and lower the discharge temperature.

[0121] Step 22: If the determination is yes, then operation can continue directly in the current state. This ensures the compressor operates in an optimal state by controlling the compressor's exhaust temperature to prevent it from becoming too high. In this invention, multiple determinations are made to ensure that T∈T1 is satisfied, aiming to control the compressor's exhaust temperature to prevent it from becoming too high and thus ensure the compressor operates in an optimal state.

[0122] In the solution of this invention, see Figure 8 , Figure 9 and Figure 10 The example shown illustrates how, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device, or the refrigerant composition regulating device and the throttling device, can be controlled to further adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. This solves the problem of compositional changes in the mixed refrigerant during operation, i.e., it solves the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state. It enables the mixed refrigerant to maintain its original composition during operation, thereby improving the effect of the mixed refrigerant.

[0123] In some embodiments, the specific process of controlling the throttling device according to the actual exhaust temperature of the compressor in step S450 and / or step S550 is described in the following exemplary description.

[0124] The following is combined Figure 6 The schematic diagram shown is a flowchart of an embodiment of the method of the present invention in which the throttling device is controlled according to the actual exhaust temperature of the compressor. The specific process of controlling the throttling device according to the actual exhaust temperature of the compressor in step S450 and / or step S550 is further explained, including steps S610 to S660.

[0125] In step S610, it is determined whether the actual exhaust temperature of the compressor is within the set exhaust temperature range.

[0126] In step S620, if it is determined that the actual exhaust temperature of the compressor is within the set exhaust temperature range, the refrigerant circulation system is controlled to maintain its current operation.

[0127] In step S630, if it is determined that the actual exhaust temperature of the compressor is not within the set exhaust temperature range, the throttling device is controlled to adjust the actual exhaust temperature of the compressor.

[0128] In step S640, it is determined whether the actual exhaust temperature of the adjusted compressor is within the set exhaust temperature range.

[0129] In step S650, if it is determined that the actual exhaust temperature of the adjusted compressor is within the set exhaust temperature range, the refrigerant circulation system is controlled to maintain its current operation.

[0130] At step S660, if it is determined that the actual discharge temperature of the adjusted compressor is not within the set discharge temperature range, the process returns to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the actual discharge temperature of the adjusted compressor is within the set discharge temperature range.

[0131] Specifically, in step S450, after controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system, the throttling device is controlled according to the actual discharge temperature of the compressor to initially adjust the refrigerant circulation volume of the refrigerant circulation system, specifically including:

[0132] After controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system, it is first determined whether the actual discharge temperature of the compressor is within the set discharge temperature range. If it is determined that the actual discharge temperature of the compressor is within the set discharge temperature range, the refrigerant circulation system is controlled to maintain its current operation. If it is determined that the actual discharge temperature of the compressor is not within the set discharge temperature range, the throttling device is controlled to adjust the actual discharge temperature of the compressor. It is then determined whether the adjusted actual discharge temperature of the compressor is within the set discharge temperature range. If it is determined that the adjusted actual discharge temperature of the compressor is within the set discharge temperature range, the refrigerant circulation system is controlled to maintain its current operation. If it is determined that the adjusted actual discharge temperature of the compressor is not within the set discharge temperature range, the process returns to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the adjusted actual discharge temperature of the compressor is within the set discharge temperature range.

[0133] In step S550, after controlling the second liquid receiver to further adjust the refrigerant circulation composition of the refrigerant circulation system, the throttling device is controlled according to the actual discharge temperature of the compressor to further adjust the refrigerant circulation volume of the refrigerant circulation system, specifically including:

[0134] After controlling the second liquid storage device to further adjust the refrigerant circulation composition of the refrigerant circulation system, a second determination is made as to whether the actual discharge temperature of the compressor is within the set discharge temperature range. If the actual discharge temperature of the compressor is determined to be within the set discharge temperature range, the refrigerant circulation system is controlled to maintain its current operation. If the actual discharge temperature of the compressor is determined to be outside the set discharge temperature range, the throttling device is controlled to adjust the actual discharge temperature of the compressor. The adjusted actual discharge temperature of the compressor is then determined to be within the set discharge temperature range. If the adjusted actual discharge temperature of the compressor is determined to be within the set discharge temperature range, the refrigerant circulation system is controlled to maintain its current operation. If the adjusted actual discharge temperature of the compressor is determined to be outside the set discharge temperature range, the process returns to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the adjusted actual discharge temperature of the compressor is within the set discharge temperature range.

[0135] It should be noted that the above implementation uses only two additional refrigerant reservoirs as an example. In actual use, the number of reservoirs is not limited to two; it can be three, four, or more. The more reservoirs there are, the more refrigerant can be stored, and the more stages can be divided to reflect the environmental conditions as set by the user. For example, with three reservoirs, the temperature can be divided into three levels: 60% for the first level, 30% for the second level, and 10% for the third level. The more refined the stages, the better the user experience. Of course, one reservoir is also possible, but the comfort level is not high. Setting up two or more reservoirs allows for a more granular division of the operating environment from the user-set environmental conditions, resulting in a better experience.

[0136] The present invention proposes a control system (such as an air conditioning refrigeration system) and its control scheme for an air conditioning device with multiple liquid receivers (such as two or more liquid receivers). The system has a simple structure and can adjust the refrigerant circulation volume and the operating composition of the mixed refrigerant to reduce the refrigerant circulation volume and achieve the optimal state. Thus, the refrigeration system can be optimized, power consumption can be reduced, and user experience can be improved.

[0137] The technical solution of this embodiment addresses an air conditioning device (such as an air conditioner or dehumidifier) ​​comprising a compressor, a first heat exchanger (e.g., an evaporator), a second heat exchanger (e.g., a condenser), a throttling device (e.g., a throttling valve), and a normally open liquid receiver (e.g., a normally open liquid receiver). The compressor's exhaust port returns to the compressor's suction port after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid receiver. A refrigerant composition regulating device (e.g., a refrigerant circulation volume regulating refrigeration system) is provided, connected in parallel with the normally open liquid receiver. The refrigerant composition regulating device has at least one adjustable liquid receiver (e.g., a first liquid receiver C1 and shut-off valves on its inlet and outlet pipes), and two or more adjustable liquid receivers are connected in parallel with different adjustment levels. During the operation of the air conditioning device... In this case, based on the degree of similarity between the operating environment of the air conditioning equipment and the user-set operating environment (e.g., degree D), the compressor's exhaust temperature (e.g., exhaust temperature T), the operation of the refrigerant composition regulating device (e.g., the opening and closing of at least one adjustable liquid receiver, the running time of each adjustable liquid receiver when open, etc.), or the opening degree of the throttling device, is controlled to adjust the refrigerant circulation volume of the air conditioning equipment; thereby, by setting the refrigerant composition regulating device, the refrigerant circulation composition and / or refrigerant circulation volume of the air conditioning equipment is adjusted, frequent start-stop of the air conditioning equipment is avoided, and the user's comfort experience is improved.

[0138] According to an embodiment of the present invention, a control device for an air conditioning device corresponding to a control method for an air conditioning device is also provided. See also Figure 7 The diagram shows a structural schematic of an embodiment of the device of the present invention. The air conditioning equipment has a refrigerant circulation system consisting of a compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a normally open liquid receiver. The air conditioning equipment also has a refrigerant composition regulating device; the refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system. That is, the air conditioning equipment has a compressor, a first heat exchanger, a second heat exchanger, a throttling device, a normally open liquid receiver, and a refrigerant composition regulating device. The compressor, the first heat exchanger, the second heat exchanger, the throttling device, and the normally open liquid receiver constitute the refrigerant circulation system. For example, the compressor's exhaust port returns to the compressor's suction port after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid receiver. The refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system. In the solution of the present invention, as... Figure 7 As shown, the control device of the air conditioning equipment includes: an acquisition unit 102 and a control unit 104.

[0139] The acquisition unit 102 is configured to acquire the actual environmental conditions of the air conditioning equipment after it is turned on and running. Specifically, it acquires the actual environmental conditions of the environment where the air conditioning equipment is located, and acquires the user-set environmental conditions for the environment where the air conditioning equipment is located; and it acquires the actual exhaust temperature of the compressor, and acquires the preset target exhaust temperature of the compressor. The acquisition unit 102 can acquire the corresponding data from the data acquisition module. For the specific functions and processing of the acquisition unit 102, please refer to step S110.

[0140] The control unit 104 is configured to, when the air conditioning equipment is operating, control the refrigerant composition regulating device, or control the refrigerant composition regulating device and the throttling device, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor. The refrigerant circulation composition of the refrigerant circulation system refers to the composition of the refrigerant participating in the circulation, and the amount of refrigerant participating in the circulation is also specified. The control unit 104 may include, for example... Figure 12 The calculation module and control module are shown. For the specific functions and processing of the control unit 104, please refer to step S120.

[0141] The present invention proposes a control scheme for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers). The scheme sets up a refrigerant circulation volume adjustment refrigeration system, which can change the refrigerant circulation volume of the air conditioning device control system by adjusting the refrigerant circulation volume. The structure is simple and can also provide a solution to the refrigerant composition problem, at least avoiding frequent start-stop of the air conditioning device control system and improving the user's comfort experience.

[0142] In some embodiments, the refrigerant composition regulating device has an adjustable liquid storage device, and the number of adjustable liquid storage devices is one or more; when the number of adjustable liquid storage devices is two or more, the adjustment degrees of the two or more adjustable liquid storage devices are the same or different. In the refrigerant circulation system, the exhaust port of the compressor returns to the suction port of the compressor after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid storage device; each of the more than one adjustable liquid storage devices is connected in parallel with the normally open liquid storage device.

[0143] The control unit 104 controls the refrigerant composition adjustment device, and is further configured to control the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, as well as the running time of at least one of the adjustable liquid storage devices after opening, and to execute a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system.

[0144] Accordingly, the control unit 104 controls the throttling device, and is further configured to control the opening degree of the throttling device to adjust the refrigerant circulation volume of the refrigerant circulation system.

[0145] In the present invention, a simple refrigerant circulation regulation refrigeration system is designed to regulate the refrigerant circulation volume and solve the problems of frequent start-stop and excessive power consumption in the control system of air conditioning equipment (such as air conditioning refrigeration system).

[0146] In some embodiments, each of the more than one adjustable liquid storage devices includes: a liquid storage body, an input valve, a first output valve, and a second output valve. The liquid storage body is such as a first liquid storage C1, the input valve is such as a shut-off valve F1, the first output valve is such as a shut-off valve F11, and the second output valve is such as a shut-off valve F12. The liquid storage body has an input pipeline, a first output pipeline, and a second output pipeline. The input valve is disposed on the input pipeline of the liquid storage body, the first output valve is disposed on the first output pipeline of the liquid storage body, and the second output valve is disposed on the second output pipeline of the liquid storage body.

[0147] The control unit 104 controls the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, as well as the operating time of at least one of the adjustable liquid storage devices after opening, and executes a preset refrigerant composition regulating mode to regulate the refrigerant circulation composition of the refrigerant circulation system, including:

[0148] The control unit 104 is further configured to determine, for at least one of the adjustable liquid storage devices in the refrigerant composition adjusting device, which one of the adjustable liquid storage devices needs to be controlled currently. The adjustable liquid storage device to be controlled can be any one of the at least one adjustable liquid storage device, or it can be an adjustable liquid storage device selected according to a pre-set selection rule. The specific functions and processing of the control unit 104 are further described in step S210.

[0149] The control unit 104 is further configured to control the opening of the input valve of the adjustable liquid storage device and the opening of the first output valve of the adjustable liquid storage device, thereby controlling the opening of the adjustable liquid storage device. The specific functions and processing of the control unit 104 are further described in step S220.

[0150] The control unit 104 is further configured to, after controlling the opening of one of the adjustable liquid storage devices, and after the adjustable liquid storage device has been running for a first set time, control the input valve of the adjustable liquid storage device to close and control the first output valve of the adjustable liquid storage device to close, thereby controlling the adjustable liquid storage device to close and entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system. The first set time is, for example, t0min. The specific functions and processing of the control unit 104 are further described in step S230.

[0151] Figure 9 This invention can demonstrate a refrigeration system control method. Figure 9 In this context, D represents the degree of proximity between the environmental operating conditions and the user-defined environmental operating conditions. For example, if the environmental operating condition is A when the unit is first turned on, the user-defined environmental operating condition is C, and the environmental operating condition during operation of the air conditioning equipment's control system (such as an air conditioning refrigeration system) is B, then D = (AB) / (AC), which can be expressed as a percentage. The closer to 1, the closer the environmental operating conditions are to the user-defined environmental operating conditions. P and Q are two different degrees, with Q being higher than P. T represents the actual exhaust temperature of the compressor during the actual operation of the air conditioning equipment's control system (such as an air conditioning refrigeration system). T1 represents the optimal exhaust temperature value for the air conditioning equipment's control system (such as an air conditioning refrigeration system) under this refrigeration system. T1 is generally set manually in advance according to the system configuration. t0 represents the duration for which the air conditioning equipment's control system (such as an air conditioning refrigeration system) needs to run after opening the valve of either of the two liquid receivers (i.e., the first liquid receiver C1 and the second liquid receiver C2). F1, F11, F2, and F21 are the shut-off valve numbers, corresponding to... Figure 8 The corresponding shut-off valve in the system.

[0152] In the solution of this invention, see Figure 8 and Figure 9 The example shown employs a simple refrigerant circulation regulation refrigeration system, which solves the problem of frequent start-stop of the control system of air conditioning equipment (such as air conditioning refrigeration system). It can change the refrigerant circulation of the control system of air conditioning equipment and has a simple structure, so as to at least avoid the frequent start-stop of the control system of air conditioning equipment and improve the user's comfort experience.

[0153] In some embodiments, in each of the adjustable liquid storage devices, the interior of the liquid storage body is divided into a first part and a second part; when the liquid storage body is placed vertically, the first part is the upper part and the second part is the lower part.

[0154] The control unit 104 enters a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system, including:

[0155] The control unit 104 is further configured to, for one of the adjustable liquid storage devices currently requiring control, after controlling the adjustable liquid storage device to close, determine the refrigerant quantity of the first part of the liquid storage body (i.e., the first portion of the refrigerant quantity of the liquid storage body) and the refrigerant quantity of the second part of the liquid storage body (i.e., the second portion of the refrigerant quantity of the liquid storage body); wherein the first portion of the refrigerant quantity of the liquid storage body is e.g., refrigerant quantity u, and the second portion of the refrigerant quantity of the liquid storage body is e. The specific functions and processing of the control unit 104 are further described in step S310.

[0156] The control unit 104 is further configured to determine the ratio of the first portion of the refrigerant quantity in the reservoir body and the second portion of the refrigerant quantity in the adjustable reservoir body as the refrigerant mixing ratio of the adjustable reservoir body. The specific functions and processing of the control unit 104 are further described in step S320.

[0157] The control unit 104 is further configured to determine the relationship between the refrigerant mixing ratio of the adjustable liquid storage device and a set ratio; wherein the set ratio is, for example, ratio i. The specific functions and processing of the control unit 104 are further described in step S330.

[0158] The control unit 104 is further configured to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system if it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is equal to the set ratio. The specific functions and processing of the control unit 104 are further described in step S340.

[0159] The control unit 104 is further configured to, if it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is greater than a set ratio, control the opening of the first output valve of the liquid storage body in the adjustable liquid storage device to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device equals the set ratio, control the closing of the first output valve of the liquid storage body in the adjustable liquid storage device to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system. The specific functions and processing of the control unit 104 are further described in step S350.

[0160] The control unit 104 is further configured to, if it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is less than a set ratio, control the second output valve of the liquid storage body in the adjustable liquid storage device to open, so as to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the one adjustable liquid storage device is equal to the set ratio, control the second output valve of the liquid storage body in the adjustable liquid storage device to close, exit the preset refrigerant composition adjustment mode, and stop adjusting the refrigerant circulation composition of the refrigerant circulation system. The specific functions and processing of the control unit 104 are further described in step S360.

[0161] Figure 10 It can display the refrigerant component adjustment method. Figure 10 In this context, u represents the upper refrigerant composition in the receiver (i.e., either the first receiver C1 or the second receiver C2), v represents the lower refrigerant composition in the receiver (i.e., either the first receiver C1 or the second receiver C2), u / v represents the refrigerant composition ratio (i.e., the ratio of the upper refrigerant composition to the lower refrigerant composition in either the first receiver C1 or the second receiver C2), and i represents the optimal value of the refrigerant composition ratio. Fx1 represents the valve for the upper refrigerant in the first receiver C1 or the second receiver C2 (F11 for the first receiver C1, F21 for the second receiver C2), and Fx2 represents the valve for the lower refrigerant in the first receiver C1 or the second receiver C2 (F12 for the first receiver C1, F22 for the second receiver C2).

[0162] In the solution of this invention, see Figure 10 The example shown illustrates how, with respect to mixed refrigerants, the refrigerant circulation rate and the operating composition of the mixed refrigerant can be adjusted through the refrigerant stratification phenomenon in the receiver tank to achieve an optimal state.

[0163] In some embodiments, in each of the adjustable liquid storage devices, when the liquid storage body is placed vertically, the liquid storage body has a top inlet, a top outlet, and a bottom outlet; wherein, when the liquid storage body is placed vertically, the input pipe of the liquid storage body is connected to the top inlet of the liquid storage body, the first output pipe of the liquid storage body is connected to the top outlet of the liquid storage body, and the second output pipe of the liquid storage body is connected to the bottom outlet of the liquid storage body. That is, when the liquid storage body is placed vertically, the liquid storage body has a top inlet, a top outlet, and a bottom outlet, the input pipe enters to the top inlet of the liquid storage body (e.g., the input pipe connects to the top inlet of the liquid storage body from the pipe between the first heat exchanger and the normally open liquid storage body), the first output pipe exits from the top outlet of the liquid storage body to the exhaust port of the compressor, and the second output pipe exits from the bottom outlet of the liquid storage body to the exhaust port of the compressor.

[0164] Figure 8 The present invention can be described as a refrigeration system that, in addition to the four main components of the refrigeration system (i.e., compressor, evaporator, condenser, expansion valve) and a normally open liquid receiver, also includes two additional liquid receivers (i.e., first liquid receiver C1 and second liquid receiver C2). The two additional liquid receivers (i.e., the first liquid receiver C1 and the second liquid receiver C2) are used to regulate the refrigerant circulation volume of the system. When the mixed liquid refrigerant is layered in the two additional liquid receivers (i.e., the first liquid receiver C1 and the second liquid receiver C2), each liquid receiver is connected to pipes and valves at the upper and lower parts. For example, shut-off valves F1 and F11 are installed on the upper connecting pipe of the first liquid receiver C1, and shut-off valve F12 is installed on the lower connecting pipe of the first liquid receiver C1; shut-off valves F2 and F21 are installed on the upper connecting pipe of the second liquid receiver C2, and shut-off valve F22 is installed on the lower connecting pipe of the second liquid receiver C2. These are used to replenish the refrigerant components in operation through the first liquid receiver C1 and the second liquid receiver C2, so that the refrigerant composition in operation is optimal.

[0165] The adjustment of the refrigerant circulation volume and refrigerant composition requires the use of the first liquid receiver C1 and the second liquid receiver C2. The shut-off valves F1, F11, and F12 are used together with the first liquid receiver C1, while the shut-off valves F2, F21, and F22 are used together with the second liquid receiver C2.

[0166] Figure 11 It can display the refrigerant stratification in the receiver (i.e., either the first receiver C1 or the second receiver C2).

[0167] The refrigerant circulation volume regulation refrigeration system proposed in this invention, through the adjustment of the composition of the mixed refrigerant (i.e., the adjustment of the mixed refrigerant components), and its simple structure and closed-loop control logic, can adjust the refrigerant circulation volume of the refrigeration system and regulate the composition of the mixed refrigerant. Moreover, it has a simple structure and does not require too many precision parts.

[0168] In some embodiments, when the refrigerant composition regulating device includes one or more of the adjustable liquid storage devices, the one or more of the adjustable liquid storage devices include a first liquid storage device; the first liquid storage device includes a first liquid reservoir C1, a shut-off valve F1, a shut-off valve F11, and a shut-off valve F12.

[0169] The control unit 104, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, controls the refrigerant composition regulating device, or controls the refrigerant composition regulating device and the throttling device, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. This includes a preliminary adjustment process for the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, as detailed below:

[0170] The control unit 104 is further configured to determine the degree of environmental condition adjustment of the air conditioning device based on the actual environmental conditions of the air conditioning device, denoted as the first degree of adjustment of the air conditioning device, such as the degree of proximity D between the initially determined environmental conditions and the user-set environmental conditions. Specifically, the control unit 104 is further configured to record the actual environmental conditions of the air conditioning device obtained when the air conditioning device starts running as the initial environmental conditions of the air conditioning device, and to record the actual environmental conditions of the air conditioning device obtained after the air conditioning device has been running for a second set time as the current environmental conditions of the air conditioning device; to record the absolute value of the difference between the initial environmental conditions and the current environmental conditions of the air conditioning device as the first condition difference, and to record the difference between the initial environmental conditions and the set environmental conditions of the air conditioning device. The absolute value of the difference is recorded as the second operating condition difference, and the ratio of the first operating condition difference to the second operating condition difference is used as the degree to which the actual environmental operating condition of the air conditioning device is far from the set environmental operating condition of the air conditioning device, which is recorded as the environmental operating condition adjustment degree of the air conditioning device, specifically as the first adjustment degree of the air conditioning device, such as the degree of closeness D between the initially determined environmental operating condition and the user-set environmental operating condition; wherein, the initial environmental operating condition of the air conditioning device is such as operating condition A, the current environmental operating condition of the air conditioning device is such as operating condition B, and the set environmental operating condition of the air conditioning device is such as operating condition C. The specific functions and processing of the control unit 104 are also described in step S410.

[0171] The control unit 104 is further configured to determine whether the first adjustment level of the air conditioning device is equal to a first set level; wherein the first set level is level P. The specific functions and processing of the control unit 104 are further described in step S420.

[0172] The control unit 104 is further configured to control the refrigerant circulation system to maintain its current operation if it is determined that the first adjustment level of the air conditioning device is not equal to the first set level. The specific functions and processing of the control unit 104 are further described in step S430.

[0173] The control unit 104 is further configured to, if it is determined that the first adjustment level of the air conditioning equipment is equal to the first set level, control the refrigerant composition adjustment device, i.e., control the first liquid storage device, to initially adjust the refrigerant circulation composition of the refrigerant circulation system. The specific functions and processing of this control unit 104 are further described in step S440.

[0174] The control unit 104 is further configured to, after controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system, control the throttling device according to the actual discharge temperature of the compressor to initially adjust the refrigerant circulation volume of the refrigerant circulation system. The specific functions and processing of the control unit 104 are further described in step S450.

[0175] like Figure 9 As shown, a control method for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers) includes:

[0176] Step 11: The air conditioner is running normally. Then proceed to step 12.

[0177] Step 12: During initial operation (i.e., before the prototype runs), the environmental condition is A, the user-defined environmental condition is C, and the environmental condition during prototype operation is B. Then, D = (AB) / (AC) represents the degree to which the environmental condition closely approximates the user-defined environmental condition. The closer D is to 1, the closer the environmental condition is to the user-defined environmental condition. Determine if D = P is satisfied: if yes, proceed to step 13; otherwise, return to step 11 (i.e., control the air conditioner to continue operating in the original mode).

[0178] Step 13: If D=P is satisfied, then proceed to step 14.

[0179] Step 14: When D=P (P is preferably 40%~60%), it means that the environmental conditions have been adjusted to a certain stage. The amount of refrigerant circulating can be appropriately reduced to reduce system power consumption. Then proceed to step 15.

[0180] Therefore, in step 14, if D=P is satisfied, then shut-off valves F1 and F11 are opened, allowing some refrigerant from the refrigerant circulation system to enter the first receiver C1. After running for t0 minutes (the longer t0 is, the more refrigerant enters the first receiver C1; t0 is preferably 3-6 minutes), shut-off valves F1 and F11 are closed, entering the refrigerant component adjustment system, i.e., entering the refrigerant composition adjustment mode, to adjust the optimal refrigerant component ratio. In the refrigerant composition adjustment mode, the specific operations all revolve around the optimal refrigerant component ratio i (i.e., the ratio that maximizes the refrigerant's performance). For details, please refer to [link to relevant documentation]. Figure 10 The example shown.

[0181] like Figure 10 As shown, the refrigerant component adjustment method includes:

[0182] Step 31: With shut-off valves F1 and F11 open, allowing some refrigerant from the refrigerant circulation system to enter the first receiver C1, and after running for t0 minutes, shut-off valves F1 and F11 closed, detect the amount of refrigerant in the upper part of the first receiver C1 (u) and the amount of refrigerant in the lower part (v), and then proceed to step 32.

[0183] In step 14, when the refrigerant enters the refrigerant component adjustment system, the refrigerant condenses and separates into layers. The amount of refrigerant in the upper layer (u) and the amount of refrigerant in the lower layer (v) are obtained through the upper and lower ports respectively, and then sent to the system. Specifically, the liquid refrigerant components in the first receiver C1 separate into layers, with the amount of refrigerant in the upper layer of the first receiver C1 being u and the amount of refrigerant in the lower layer of the first receiver C1 being v.

[0184] Step 32: Then determine whether u / v = i (i represents the optimal mixing ratio of the refrigerant; the optimal mixing ratio varies for different refrigerants, and i can be determined according to the actual situation, taking a range of values): If yes, the refrigerant component adjustment system can be exited, because the optimal ratio has been reached, so no further adjustment is needed. If not, proceed to step 33 to determine whether u / v is greater than i.

[0185] Step 33: Determine if u / v > i: If yes, it means the stored amount of u is too large. The shut-off valve F11 needs to be opened to release some of the upper refrigerant into the system until u / v = i. Then, close the shut-off valve F11 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed. Similarly, if no, open the shut-off valve F12 to release some of the lower refrigerant into the system until u / v = i. Then, close the shut-off valve F12 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed.

[0186] In the solution of this invention, see Figure 8 , Figure 9 and Figure 10The example shown illustrates how, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device, or the refrigerant composition regulating device and the throttling device, can be controlled to initially adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. This solves the problem of compositional changes in the mixed refrigerant during operation, i.e., it solves the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state. It enables the mixed refrigerant to maintain its original composition during operation, thereby improving the effect of the mixed refrigerant.

[0187] In some embodiments, the control unit 104 controls the refrigerant composition regulating device, or controls the refrigerant composition regulating device and the throttling device, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. The system further includes a process for further adjusting the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, as detailed below:

[0188] The control unit 104 is further configured to, after controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to initially adjust the refrigerant circulation volume of the refrigerant circulation system, determine the degree of environmental condition adjustment of the air conditioning equipment based on the actual environmental conditions of the air conditioning equipment, and record it as the second degree of adjustment of the air conditioning equipment, such as further determining the degree of closeness D between the obtained environmental conditions and the user-set environmental conditions. Specifically, the control unit 104 is further configured to record the actual environmental conditions of the air conditioning equipment obtained when the air conditioning equipment starts running as the initial environmental conditions of the air conditioning equipment, and to record the actual environmental conditions of the air conditioning equipment obtained after the air conditioning equipment has been running for a third set time as the current environmental conditions of the air conditioning equipment; to record the absolute value of the difference between the initial environmental conditions and the current environmental conditions of the air conditioning equipment as the first condition difference, and to record the absolute value of the difference between the initial environmental conditions and the set environmental conditions of the air conditioning equipment as... The second operating condition difference is used, and the ratio of the first operating condition difference to the second operating condition difference is taken as the degree to which the actual environmental operating condition of the air conditioning device is far from the set environmental operating condition of the air conditioning device. This is denoted as the environmental operating condition adjustment degree of the air conditioning device, specifically as the second adjustment degree of the air conditioning device. For example, the degree of closeness D between the obtained environmental operating condition and the user-set environmental operating condition is determined again. The initial environmental operating condition of the air conditioning device is such as operating condition A, the current environmental operating condition of the air conditioning device is such as operating condition B, the set environmental operating condition of the air conditioning device is such as operating condition C, and the third set time is greater than the second set time. The specific functions and processing of this control unit 104 are further described in step S510.

[0189] The control unit 104 is further configured to determine whether the environmental condition adjustment level of the air conditioning device is equal to a second preset level, wherein the second preset level is greater than a first preset level; wherein the second preset level is level Q. The specific functions and processing of the control unit 104 are further described in step S520.

[0190] The control unit 104 is further configured to control the refrigerant circulation system to maintain its current operation if it is determined that the environmental condition adjustment level of the air conditioning equipment is not equal to the second preset level. The specific functions and processing of this control unit 104 are further described in step S530.

[0191] The control unit 104 is further configured to, if it is determined that the environmental condition adjustment level of the air conditioning equipment is equal to the second preset level, control the refrigerant composition adjustment device, i.e., control the second liquid storage device, to further adjust the refrigerant circulation composition of the refrigerant circulation system. The specific functions and processing of this control unit 104 are further described in step S540.

[0192] The control unit 104 is further configured to, after controlling the second liquid storage device to further adjust the refrigerant circulation composition of the refrigerant circulation system, control the throttling device according to the actual discharge temperature of the compressor to further adjust the refrigerant circulation volume of the refrigerant circulation system. The specific functions and processing of the control unit 104 are also described in step S550.

[0193] like Figure 9 As shown, a control method for a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid receivers (such as two or more liquid receivers) further includes:

[0194] Step 15: After entering the refrigerant component adjustment system in step 14 and adjusting the refrigerant components, exit the refrigerant component adjustment system and then determine whether T∈T1 is satisfied: if yes, proceed to step 17; otherwise, proceed to step 16. T represents the compressor discharge temperature in the system, and T1 represents the optimal discharge temperature under the system (the optimal value is different for different systems and different refrigerants; for example, for R410A, it is generally taken as 80℃~100℃).

[0195] Step 16: Determine if T∈T1 is satisfied: If the determination is no, it means that the refrigerant circulation volume is too small, causing the compressor's exhaust temperature to be too high. It is necessary to adjust the opening of the throttle valve accordingly to reduce the compressor's exhaust temperature until T∈T1 is satisfied. Then, proceed to step 17 to continue operating in the current state.

[0196] Step 17: If the determination is yes, the system can continue operating in the current state, and then proceed to step 18. In this way, by controlling the compressor's exhaust temperature to prevent it from becoming too high, the compressor can be ensured to operate in an optimal state.

[0197] Step 18: Then proceed to determine whether D equals Q (Q is generally preferred to be 10%~20%, this range is generally close to the user-set environmental conditions, only a portion of the refrigerant needs to be used to run, so that the operating conditions gradually approach the set environmental conditions, which can avoid frequent start-stop of the prototype and reduce power consumption): If not, return to step 17 to continue running in the current state; if yes, execute step 19 to continue adjusting the optimal refrigerant component ratio.

[0198] Step 19: Further open shut-off valves F2 and F21 to allow the second receiver C2 to store some refrigerant. That is, open shut-off valves F2 and F21 to allow some refrigerant from the refrigerant circulation system to enter the second receiver C2. Run for t0 minutes (the longer t0, the more refrigerant enters the second receiver C2; t0 is preferably 3-6 minutes). Then close shut-off valves F2 and F21 to enter the refrigerant composition adjustment system, i.e., enter the refrigerant composition adjustment mode. Adjust the optimal refrigerant component ratio, and then proceed to step 20. In the refrigerant composition adjustment mode, all specific operations revolve around the optimal refrigerant component ratio i (i.e., the ratio that maximizes refrigerant performance). For details, please refer to [link to relevant documentation]. Figure 10 The example shown.

[0199] Continue as Figure 10 As shown, the refrigerant component adjustment method also includes:

[0200] Step 34: With shut-off valves F2 and F21 open, allowing some refrigerant from the refrigerant circulation system to enter the second receiver C2, and after running for t0 minutes, shut-off valves F2 and F21 closed, detect the amount of refrigerant in the upper part of the second receiver C2 (u) and the amount of refrigerant in the lower part (v), and then proceed to step 35.

[0201] In step 18, when the refrigerant enters the refrigerant component adjustment system, the refrigerant condenses and separates into layers. The amount of refrigerant in the upper layer (u) and the amount of refrigerant in the lower layer (v) are obtained through the upper and lower ports respectively, and then sent to the system. Specifically, the liquid refrigerant components in the second receiver C2 separate into layers, with the amount of refrigerant in the upper layer of the second receiver C2 being u and the amount of refrigerant in the lower layer of the second receiver C2 being v.

[0202] Step 35: Then determine whether u / v = i (i represents the optimal mixing ratio of the refrigerant; the optimal mixing ratio varies for different refrigerants, and i can be determined according to the actual situation, taking a range of values): If yes, the refrigerant component adjustment system can be exited, because the optimal ratio has been reached, so no further adjustment is needed. If not, proceed to step 36 to determine whether u / v is greater than i.

[0203] Step 36: Determine if u / v > i: If yes, it means the stored amount of u is too large. The shut-off valve F21 needs to be opened to release some of the upper refrigerant into the system until u / v = i. Then, close the shut-off valve F21 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed. Similarly, if no, open the shut-off valve F22 to release some of the lower refrigerant into the system until u / v = i. Then, close the shut-off valve F22 and exit the refrigerant component adjustment system, as the optimal ratio has been reached and no further adjustment is needed.

[0204] Step 20: After entering the refrigerant component adjustment system in step 19 and adjusting the refrigerant components, exit the refrigerant component adjustment system and then determine whether T∈T1 is satisfied: if yes, proceed to step 22; otherwise, proceed to step 21. T represents the compressor discharge temperature in the system, and T1 represents the optimal discharge temperature under the system (the optimal value is different for different systems and different refrigerants; for example, for R410A, it is generally taken as 80℃~100℃).

[0205] Step 21: Determine if T∈T1 is satisfied: If the determination is no, it means that the refrigerant circulation volume is too small, resulting in the compressor's exhaust temperature being too high. It is necessary to adjust the opening of the throttle valve accordingly to reduce the compressor's exhaust temperature until T∈T1 is satisfied. Then, proceed to step 22, which means continuing to operate in the current state.

[0206] Step 22: If the determination is yes, then operation can continue directly in the current state. This ensures the compressor operates in an optimal state by controlling the compressor's exhaust temperature to prevent it from becoming too high. In this invention, multiple determinations are made to ensure that T∈T1 is satisfied, aiming to control the compressor's exhaust temperature to prevent it from becoming too high and thus ensure the compressor operates in an optimal state.

[0207] In the solution of this invention, see Figure 8 , Figure 9 and Figure 10 The example shown illustrates how, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device, or the refrigerant composition regulating device and the throttling device, can be controlled to further adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system. This solves the problem of compositional changes in the mixed refrigerant during operation, i.e., it solves the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state. It enables the mixed refrigerant to maintain its original composition during operation, thereby improving the effect of the mixed refrigerant.

[0208] In some embodiments, the control unit 104 controls the throttling device based on the actual discharge temperature of the compressor, including:

[0209] The control unit 104 is further configured to determine whether the actual exhaust temperature of the compressor is within the set exhaust temperature range. The specific functions and processing of the control unit 104 are further described in step S610.

[0210] The control unit 104 is further configured to control the refrigerant circulation system to maintain its current operation if it is determined that the actual discharge temperature of the compressor is within the set discharge temperature range. The specific functions and processing of this control unit 104 are further described in step S620.

[0211] The control unit 104 is further configured to control the throttling device to adjust the actual discharge temperature of the compressor if it is determined that the actual discharge temperature of the compressor is not within the set discharge temperature range. The specific functions and processing of the control unit 104 are further described in step S630.

[0212] The control unit 104 is further configured to determine whether the actual exhaust temperature of the adjusted compressor is within the set exhaust temperature range. The specific functions and processing of the control unit 104 are further described in step S640.

[0213] The control unit 104 is further configured to control the refrigerant circulation system to maintain its current operation if it is determined that the actual discharge temperature of the adjusted compressor is within the set discharge temperature range. The specific functions and processing of this control unit 104 are further described in step S650.

[0214] The control unit 104 is further configured to, if it is determined that the actual discharge temperature of the adjusted compressor is not within the set discharge temperature range, return to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the actual discharge temperature of the adjusted compressor is within the set discharge temperature range. The specific functions and processing of this control unit 104 are further described in step S660.

[0215] Specifically, after controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system, the control unit 104, based on the actual discharge temperature of the compressor, controls the throttling device to initially adjust the refrigerant circulation volume of the refrigerant circulation system, specifically including:

[0216] The control unit 104 is further configured to, after controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system, first determine whether the actual discharge temperature of the compressor is within the set discharge temperature range; the control unit 104 is further configured to, if it is first determined that the actual discharge temperature of the compressor is within the set discharge temperature range, control the refrigerant circulation system to maintain its current operation; the control unit 104 is further configured to, if it is first determined that the actual discharge temperature of the compressor is not within the set discharge temperature range, control the throttling device to adjust the actual discharge temperature of the compressor. The control unit 104 is further configured to, determine whether the adjusted actual discharge temperature of the compressor is within the set discharge temperature range; the control unit 104 is further configured to, if it is determined that the adjusted actual discharge temperature of the compressor is within the set discharge temperature range, control the refrigerant circulation system to maintain its current operation; the control unit 104 is further configured to, if it is determined that the adjusted actual discharge temperature of the compressor is not within the set discharge temperature range, return to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the adjusted actual discharge temperature of the compressor is within the set discharge temperature range.

[0217] After controlling the second liquid storage device to further adjust the refrigerant circulation composition of the refrigerant circulation system, the control unit 104, based on the actual discharge temperature of the compressor, controls the throttling device to further adjust the refrigerant circulation volume of the refrigerant circulation system, specifically including:

[0218] The control unit 104 is further configured to, after controlling the second liquid storage device to further adjust the refrigerant circulation composition of the refrigerant circulation system, determine for the second time whether the actual discharge temperature of the compressor is within the set discharge temperature range; the control unit 104 is further configured to, if it is determined for the second time that the actual discharge temperature of the compressor is within the set discharge temperature range, control the refrigerant circulation system to maintain its current operation; the control unit 104 is further configured to, if it is determined for the second time that the actual discharge temperature of the compressor is not within the set discharge temperature range, control the throttling device to adjust the actual discharge temperature of the compressor. The control unit 104 is further configured to, determine whether the adjusted actual discharge temperature of the compressor is within the set discharge temperature range; the control unit 104 is further configured to, if it is determined that the adjusted actual discharge temperature of the compressor is within the set discharge temperature range, control the refrigerant circulation system to maintain its current operation; the control unit 104 is further configured to, if it is determined that the adjusted actual discharge temperature of the compressor is not within the set discharge temperature range, return to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the adjusted actual discharge temperature of the compressor is within the set discharge temperature range.

[0219] It should be noted that the above implementation uses only two additional refrigerant reservoirs as an example. In actual use, the number of reservoirs is not limited to two; it can be three, four, or more. The more reservoirs there are, the more refrigerant can be stored, and the more stages can be divided to reflect the environmental conditions as set by the user. For example, with three reservoirs, the temperature can be divided into three levels: 60% for the first level, 30% for the second level, and 10% for the third level. The more refined the stages, the better the user experience. Of course, one reservoir is also possible, but the comfort level is not high. Setting up two or more reservoirs allows for a more granular division of the operating environment from the user-set environmental conditions, resulting in a better experience.

[0220] The present invention proposes a control system (such as an air conditioning refrigeration system) and its control scheme for an air conditioning device with multiple liquid receivers (such as two or more liquid receivers). The system has a simple structure and can adjust the refrigerant circulation volume and the operating composition of the mixed refrigerant to reduce the refrigerant circulation volume and achieve the optimal state. Thus, the refrigeration system can be optimized, power consumption can be reduced, and user experience can be improved.

[0221] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0222] According to an embodiment of the present invention, an air conditioning device corresponding to a control device for an air conditioning device is also provided. This air conditioning device may include: the control device for the air conditioning device described above.

[0223] In some embodiments, the air conditioning device includes an air conditioner or a dehumidifier.

[0224] In the solution of this invention, the above-described control logic is generally applicable to various air conditioning fields, including but not limited to dehumidifiers, portable units, split wall-mounted units, etc., that is, the control system of air conditioning equipment with compressors (such as air conditioning refrigeration systems). The relevant parameters can be adjusted according to the specific system configuration. The solution of this invention is applicable to both fixed-frequency and variable-frequency air conditioners, but the effect is more pronounced on fixed-frequency air conditioners.

[0225] Since the processing and functions implemented by the air conditioning device in this embodiment are basically the same as those of the aforementioned device embodiments, principles and examples, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0226] According to an embodiment of the present invention, a computer program product corresponding to a control method for an air conditioning device is also provided, comprising a computer program that, when executed by a processor, implements the steps of the control method for the air conditioning device described above.

[0227] Since the processing and functions implemented by the product in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0228] According to an embodiment of the present invention, a storage medium corresponding to a control method for an air conditioning device is also provided. The storage medium includes a stored program, wherein, when the program is executed, the device where the storage medium is located executes the steps of the control method for the air conditioning device described above.

[0229] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0230] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0231] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control method for an air conditioning device, characterized in that, The air conditioning equipment has a refrigerant circulation system consisting of a compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a normally open liquid receiver. The air conditioning equipment also has a refrigerant composition regulating device. The refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system. The refrigerant composition regulating device has an adjustable liquid receiver, and the number of adjustable liquid receivers is one or more. Each of the more than one adjustable liquid receivers is connected in parallel with the normally open liquid receiver. Each of the above adjustable liquid storage devices includes: a liquid storage body; in each adjustable liquid storage device, the liquid storage body has a top inlet and a top outlet, and a bottom outlet; the above adjustable liquid storage devices include a first liquid storage device and a second liquid storage device; the control method of the air conditioning equipment includes: When the air conditioning equipment is turned on and running, the actual environmental operating conditions of the air conditioning equipment are obtained; and the actual exhaust temperature of the compressor is obtained. Based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device is controlled, or the refrigerant composition regulating device and the throttling device are controlled, to adjust the refrigerant circulation composition and refrigerant circulation volume of the refrigerant circulation system, including: Based on the actual environmental conditions of the air conditioning equipment, the degree of environmental condition adjustment of the air conditioning equipment is determined and denoted as the first degree of adjustment of the air conditioning equipment. If it is determined that the first adjustment level of the air conditioning equipment is equal to the first set level, then the refrigerant composition adjustment device is controlled, that is, the first liquid storage device is controlled, to reduce the refrigerant circulation volume, so as to initially adjust the refrigerant circulation composition of the refrigerant circulation system; according to the actual exhaust temperature of the compressor, the throttling device is controlled, so as to initially adjust the refrigerant circulation volume of the refrigerant circulation system. After controlling the first liquid storage device to initially adjust the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to initially adjust the refrigerant circulation volume of the refrigerant circulation system, the degree of environmental condition adjustment of the air conditioning equipment is determined according to the actual environmental conditions of the air conditioning equipment, and is recorded as the second degree of adjustment of the air conditioning equipment. If it is determined that the environmental condition adjustment level of the air conditioning equipment is equal to the second set level, then the refrigerant composition adjustment device is controlled, that is, the second liquid storage device is controlled, to reduce the refrigerant circulation volume, so as to further adjust the refrigerant circulation composition of the refrigerant circulation system; the second set level is greater than the first set level.

2. The control method for the air conditioning equipment according to claim 1, characterized in that, In the refrigerant circulation system, the compressor's exhaust port returns to the compressor's suction port after passing through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid receiver. in, The device for controlling the refrigerant composition adjustment includes: Control the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, as well as the running time of at least one of the adjustable liquid storage devices after opening, and execute a preset refrigerant composition regulating mode to regulate the refrigerant circulation composition of the refrigerant circulation system. Controlling the throttling device includes: The opening degree of the throttling device is controlled to adjust the refrigerant circulation volume of the refrigerant circulation system.

3. The control method for the air conditioning equipment according to claim 2, characterized in that, Each of the adjustable liquid storage devices further includes: an input valve, a first output valve, and a second output valve; wherein the liquid storage body has an input pipeline, a first output pipeline, and a second output pipeline, the input valve is disposed on the input pipeline of the liquid storage body, the first output valve is disposed on the first output pipeline of the liquid storage body, and the second output valve is disposed on the second output pipeline of the liquid storage body; Controlling the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, and the operating time of at least one of the adjustable liquid storage devices after opening, and executing a preset refrigerant composition regulating mode to regulate the refrigerant circulation composition of the refrigerant circulation system, including: For at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, determine one of the adjustable liquid storage devices that needs to be controlled at present; The input valve of the adjustable liquid storage device is opened, and the first output valve of the adjustable liquid storage device is opened, so as to control the opening of the adjustable liquid storage device; After the adjustable liquid storage device has been running for a first set period of time, the input valve of the adjustable liquid storage device is closed and the first output valve of the adjustable liquid storage device is closed, so as to control the adjustable liquid storage device to shut down and enter the preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system.

4. The control method for the air conditioning equipment according to claim 3, characterized in that, In each of the adjustable liquid storage devices, the interior of the liquid storage body is divided into a first part and a second part; Entering a pre-set refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system includes: For an adjustable liquid storage device that needs to be controlled, determine the refrigerant quantity of the first part of the liquid storage body in the adjustable liquid storage device, i.e., the refrigerant quantity of the first part of the liquid storage body, and the refrigerant quantity of the second part of the liquid storage body, i.e., the refrigerant quantity of the second part of the liquid storage body. The ratio of the first portion of the refrigerant quantity in the liquid reservoir body and the second portion of the refrigerant quantity in the liquid reservoir body of the adjustable liquid reservoir device is determined as the refrigerant mixing ratio of the adjustable liquid reservoir device. Determine the relationship between the refrigerant mixing ratio and the set ratio of the adjustable liquid storage device; If it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, then the preset refrigerant composition adjustment mode is exited to stop adjusting the refrigerant circulation composition of the refrigerant circulation system. If it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is greater than the set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, then the first output valve of the liquid storage body in the adjustable liquid storage device is closed to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system; If it is determined that the refrigerant mixing ratio of one of the adjustable liquid storage devices is less than the set ratio, the second output valve of the liquid storage body in the adjustable liquid storage device is opened to adjust the refrigerant circulation composition of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, the second output valve of the liquid storage body in the adjustable liquid storage device is closed to exit the preset refrigerant composition adjustment mode and stop adjusting the refrigerant circulation composition of the refrigerant circulation system.

5. The control method for the air conditioning equipment according to claim 3 or 4, characterized in that, in, When the reservoir body is placed vertically, the input pipe of the reservoir body is connected to the top inlet of the reservoir body, the first output pipe of the reservoir body is connected to the top outlet of the reservoir body, and the second output pipe of the reservoir body is connected to the bottom outlet of the reservoir body.

6. The control method for the air conditioning equipment according to any one of claims 1 to 4, characterized in that, Based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device is controlled, or the refrigerant composition regulating device and the throttling device are controlled, to adjust the refrigerant circulation composition and refrigerant circulation volume of the refrigerant circulation system, including: Determine whether the first adjustment level of the air conditioning device is equal to the first set level; If it is determined that the first adjustment level of the air conditioning device is not equal to the first set level, then the refrigerant circulation system is controlled to maintain its current operation.

7. The control method for the air conditioning equipment according to claim 5, characterized in that, Based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device is controlled, or the refrigerant composition regulating device and the throttling device are controlled, to adjust the refrigerant circulation composition and refrigerant circulation volume of the refrigerant circulation system, including: Determine whether the first adjustment level of the air conditioning device is equal to the first set level; If it is determined that the first adjustment level of the air conditioning device is not equal to the first set level, then the refrigerant circulation system is controlled to maintain its current operation.

8. The control method for the air conditioning equipment according to claim 6, characterized in that, Based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device is controlled, or the refrigerant composition regulating device and the throttling device are controlled, to adjust the refrigerant circulation composition and refrigerant circulation volume of the refrigerant circulation system, further comprising: Determine whether the environmental condition adjustment level of the air conditioning equipment is equal to the second set level; If it is determined that the environmental condition adjustment level of the air conditioning equipment is not equal to the second set level, then the refrigerant circulation system is controlled to maintain the current operation; The throttling device is controlled based on the actual exhaust temperature of the compressor to further adjust the refrigerant circulation volume of the refrigerant circulation system.

9. The control method for the air conditioning equipment according to claim 7, characterized in that, Based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant composition regulating device is controlled, or the refrigerant composition regulating device and the throttling device are controlled, to adjust the refrigerant circulation composition and refrigerant circulation volume of the refrigerant circulation system, further comprising: Determine whether the environmental condition adjustment level of the air conditioning equipment is equal to the second set level; If it is determined that the environmental condition adjustment level of the air conditioning equipment is not equal to the second set level, then the refrigerant circulation system is controlled to maintain the current operation; The throttling device is controlled based on the actual exhaust temperature of the compressor to further adjust the refrigerant circulation volume of the refrigerant circulation system.

10. The control method for the air conditioning equipment according to claim 6, characterized in that, The throttling device is controlled based on the actual discharge temperature of the compressor, including: Determine whether the actual exhaust temperature of the compressor is within the set exhaust temperature range; If it is determined that the actual discharge temperature of the compressor is within the set discharge temperature range, then the refrigerant circulation system is controlled to maintain its current operation. If it is determined that the actual discharge temperature of the compressor is not within the set discharge temperature range, the throttling device is controlled to adjust the actual discharge temperature of the compressor. Determine whether the actual exhaust temperature of the adjusted compressor is within the set exhaust temperature range; If it is determined that the actual discharge temperature of the adjusted compressor is within the set discharge temperature range, then the refrigerant circulation system is controlled to maintain its current operation. If it is determined that the actual discharge temperature of the compressor after adjustment is not within the set discharge temperature range, then return to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the actual discharge temperature of the compressor after adjustment is within the set discharge temperature range.

11. The control method for the air conditioning equipment according to any one of claims 7 to 9, characterized in that, The throttling device is controlled based on the actual discharge temperature of the compressor, including: Determine whether the actual exhaust temperature of the compressor is within the set exhaust temperature range; If it is determined that the actual discharge temperature of the compressor is within the set discharge temperature range, then the refrigerant circulation system is controlled to maintain its current operation. If it is determined that the actual discharge temperature of the compressor is not within the set discharge temperature range, the throttling device is controlled to adjust the actual discharge temperature of the compressor. Determine whether the actual exhaust temperature of the adjusted compressor is within the set exhaust temperature range; If it is determined that the actual discharge temperature of the adjusted compressor is within the set discharge temperature range, then the refrigerant circulation system is controlled to maintain its current operation. If it is determined that the actual discharge temperature of the compressor after adjustment is not within the set discharge temperature range, then return to continue controlling the throttling device to continue adjusting the actual discharge temperature of the compressor until the actual discharge temperature of the compressor after adjustment is within the set discharge temperature range.

12. A control device for an air conditioning equipment, used to control the air conditioning equipment using the control method for an air conditioning equipment as described in any one of claims 1 to 11, characterized in that, The air conditioning equipment has a refrigerant circulation system consisting of a compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a normally open liquid receiver. The air conditioning equipment also has a refrigerant composition regulating device. The refrigerant composition regulating device is connected in parallel with the normally open liquid receiver and is used to regulate the refrigerant circulation volume of the refrigerant circulation system. The control device of the air conditioning equipment includes: The acquisition unit is configured to acquire the actual environmental operating conditions of the air conditioning equipment after it is turned on and running; and to acquire the actual exhaust temperature of the compressor. The control unit is configured to control the refrigerant composition regulating device, or to control the refrigerant composition regulating device and the throttling device, based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, so as to adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system.

13. An air conditioning device, characterized in that, include: The control device for the air conditioning equipment as described in claim 12.

14. The air conditioning device according to claim 13, characterized in that, The air conditioning equipment includes: an air conditioner or a dehumidifier.

15. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the control method of the air conditioning device according to any one of claims 1 to 11.

16. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the control method for the air conditioning equipment as described in any one of claims 1 to 11.

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