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

Abstract

The invention discloses air conditioning equipment and a control method and device thereof, a storage medium and a computer program product. The air conditioning equipment is provided with 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 component adjusting device connected with the normally-open liquid storage device in parallel; the method comprises the steps that under the condition that the air conditioning equipment runs after being started, the actual environment working condition of the air conditioning equipment is obtained, and the actual exhaust temperature of a compressor is obtained; and according to the actual environment working condition of the air conditioning equipment and the actual exhaust temperature of the compressor, the refrigerant component adjusting device and / or the throttling device are / is controlled so as to adjust the refrigerant circulation component and / or the refrigerant circulation amount of the refrigerant circulation system. According to the scheme, by arranging the refrigerant component adjusting device, the refrigerant circulation component and / or the refrigerant circulation amount of the air conditioning equipment are / is adjusted, frequent starting and stopping of the air conditioning equipment are avoided, and the comfort experience of a user is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning equipment, and specifically relates to a control method, device, air conditioning equipment, storage medium and computer program product for air conditioning equipment (such as air conditioning), and more 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 more than two liquid reservoirs). Background Art

[0002] Air conditioning equipment (such as air conditioners) often do not require too much refrigerant when operating under certain working conditions. This is because too much refrigerant will not only cause the system (i.e., the air conditioning control system) to have excessive 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 assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The object of the present invention is to provide a control method, device, air conditioning equipment, storage medium and computer program product for air conditioning equipment, so as to solve the problem that the refrigerant circulation amount cannot be adjusted during the operation of the air conditioning equipment (such as air conditioning), resulting in excessive refrigerant in the air conditioning equipment (such as air conditioning) under certain working conditions, causing the system to start and stop frequently, affecting the user's comfort experience, and achieving the effect of adjusting the refrigerant circulation composition and / or refrigerant circulation amount of the air conditioning equipment by setting a refrigerant composition adjustment device, avoiding frequent start and stop of the air conditioning equipment, and improving the user's comfort experience.

[0005] The present invention provides a control method for air-conditioning equipment, wherein the air-conditioning equipment 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 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 storage device, and is used to regulate the refrigerant circulation amount of the refrigerant circulation system; the control method for the air-conditioning equipment includes: when the air-conditioning equipment is started and running, obtaining the actual environmental working conditions of the air-conditioning equipment; and obtaining the actual exhaust temperature of the compressor; according to the actual environmental working conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor, controlling the refrigerant composition regulating device, or controlling the refrigerant composition regulating device and the throttling device, to regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system.

[0006] In some embodiments, the refrigerant composition regulating device has an adjustable liquid storage device, and the number of the adjustable liquid storage devices is more than one; in the refrigerant circulation system, the exhaust port of the compressor returns to the intake 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 operating time after at least one of the adjustable liquid storage devices is turned on, and executing a pre-set refrigerant composition regulating mode to adjust the refrigerant circulation composition of the refrigerant circulation system; controlling the throttling device includes: controlling the opening degree of the throttling device to adjust the refrigerant circulation amount of the refrigerant circulation system.

[0007] In some embodiments, each of the more than one adjustable liquid storage devices comprises: 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 arranged on the input pipeline of the liquid storage body, the first output valve is arranged on the first output pipeline of the liquid storage body, and the second output valve is arranged on the second output pipeline of the liquid storage body; control the opening and closing of at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, and the operating time after at least one of the adjustable liquid storage devices is opened, and execute a preset refrigerant composition adjustment mode to adjust 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 regulating device, determining one of the adjustable liquid storage devices that currently needs to be controlled; controlling the input valve of the one adjustable liquid storage device to open, and controlling the first output valve of the one adjustable liquid storage device to open, so as to control the one adjustable liquid storage device to open; after the one adjustable liquid storage device runs for a first set time, controlling the input valve of the one adjustable liquid storage device to close, and controlling the first output valve of the one adjustable liquid storage device to close, so as to control the one adjustable liquid storage device to close, and entering a pre-set refrigerant composition regulating mode to regulate 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 pre-set refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system, including: for the adjustable liquid storage device currently to be controlled, determining the refrigerant amount of the first part of the liquid storage body in the adjustable liquid storage device, that is, the first part of the refrigerant amount of the liquid storage body, and the refrigerant amount of the second part of the liquid storage body, that is, the second part of the refrigerant amount of the liquid storage body; determining the ratio of the first part of the refrigerant amount of the liquid storage body in the adjustable liquid storage device to the second part of the refrigerant amount of the liquid storage body as the refrigerant mixing ratio of the adjustable liquid storage device; determining the relationship between the refrigerant mixing ratio of the adjustable liquid storage device and the set ratio; if it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, exiting the pre-set 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 the adjustable liquid storage device is greater than the set ratio, the first output valve of the liquid storage body in the adjustable liquid storage device is controlled to open to adjust the refrigerant circulation component of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, the first output valve of the liquid storage body in the adjustable liquid storage device is controlled to close, and the preset refrigerant composition adjustment mode is exited to stop adjusting the refrigerant circulation component of the refrigerant circulation system; if it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is less than the set ratio, the second output valve of the liquid storage body in the adjustable liquid storage device is controlled to open to adjust the refrigerant circulation component 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 controlled to close, and the preset refrigerant composition adjustment mode is exited to stop adjusting the refrigerant circulation component of the refrigerant circulation system.

[0009] In some embodiments, in each of the adjustable liquid storage devices, the reservoir body has a top inlet and a top outlet, as well as a bottom outlet; wherein, 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.

[0010] In some embodiments, when the refrigerant composition regulating device includes more than one adjustable liquid storage device, the more than one adjustable liquid storage device includes a first liquid storage device; according to the actual environmental operating 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 regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system, including: determining the environmental operating condition regulation degree of the air-conditioning equipment according to the actual environmental operating conditions of the air-conditioning equipment, recorded as the first regulation degree of the air-conditioning equipment; determining whether the first regulation degree of the air-conditioning equipment is equal to a first set degree; if it is determined that the first regulation degree of the air-conditioning equipment is not equal to the first set degree, controlling the refrigerant circulation system to maintain current operation; if it is determined that the first regulation degree of the air-conditioning equipment is equal to the first set degree, controlling the refrigerant composition regulating device, that is, controlling the first liquid storage device, to preliminarily 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 preliminarily regulate the refrigerant circulation amount of the refrigerant circulation system.

[0011] In some embodiments, according to 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 regulate the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, and further comprising: after controlling the first liquid storage device to preliminarily regulate the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to preliminarily regulate the refrigerant circulation volume of the refrigerant circulation system, determining the degree of environmental condition regulation of the air-conditioning equipment according to the actual environmental conditions of the air-conditioning equipment, recorded as the degree of environmental condition regulation of the air-conditioning equipment The second adjustment degree; determining whether the environmental operating condition adjustment degree of the air-conditioning equipment is equal to the second set degree, and the second set degree is greater than the first set degree; if it is determined that the environmental operating condition adjustment degree of the air-conditioning equipment is not equal to the second set degree, controlling the refrigerant circulation system to maintain the current operation; if it is determined that the environmental operating condition adjustment degree of the air-conditioning equipment is equal to the second set degree, controlling the refrigerant composition adjustment device, that is, controlling the second liquid storage device, to further adjust the refrigerant circulation composition of the refrigerant circulation system; according to the actual exhaust temperature of the compressor, controlling the throttling device to further adjust the refrigerant circulation amount of the refrigerant circulation system.

[0012] In some embodiments, the throttling device is controlled according to the actual exhaust temperature of the compressor, including: determining whether the actual exhaust temperature of the compressor is already within the set exhaust temperature range; if it is determined that the actual exhaust temperature of the compressor is already within the set exhaust temperature range, controlling the refrigerant circulation system to maintain the current operation; if it is determined that the actual exhaust temperature of the compressor is not within the set exhaust temperature range, controlling the throttling device to adjust the actual exhaust temperature of the compressor; determining whether the adjusted actual exhaust temperature of the compressor is already within the set exhaust temperature range; if it is determined that the adjusted actual exhaust temperature of the compressor is already within the set exhaust temperature range, controlling the refrigerant circulation system to maintain the current operation; if it is determined that the adjusted actual exhaust temperature of the compressor is not within the set exhaust temperature range, returning to continue to control the throttling device to continue to adjust the actual exhaust temperature of the compressor until the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range.

[0013] Matching the above method, the present invention further provides a control device for an air-conditioning equipment, wherein 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 storage device, and 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 storage device and is used to regulate the refrigerant circulation amount of the refrigerant circulation system; the control device of the air-conditioning equipment includes: an acquisition unit, configured to obtain the actual environmental working conditions of the air-conditioning equipment when the air-conditioning equipment is started and running; and, to obtain 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 according to the actual environmental working conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor, so as to regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system.

[0014] In some embodiments, the refrigerant composition regulating device has an adjustable liquid storage device, and the number of the adjustable liquid storage devices is more than one; in the refrigerant circulation system, the exhaust port of the compressor returns to the intake 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; 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 in the refrigerant composition regulating device, and the operating time after at least one of the adjustable liquid storage devices is turned on, and executing a pre-set refrigerant composition regulating mode to adjust 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 adjust the refrigerant circulation amount 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 arranged on the input pipeline of the liquid storage body, the first output valve is arranged on the first output pipeline of the liquid storage body, and the second output valve is arranged 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 after at least one of the adjustable liquid storage devices is opened, and executes a pre-set refrigerant composition adjustment mode to adjust The refrigerant circulation component of the refrigerant circulation system includes: for at least one of the adjustable liquid storage devices in the refrigerant component adjustment device, determining one of the adjustable liquid storage devices that currently needs to be controlled; controlling the input valve of the one adjustable liquid storage device to open, and controlling the first output valve of the one adjustable liquid storage device to open, so as to control the one adjustable liquid storage device to open; after the one adjustable liquid storage device runs for a first set period of time, controlling the input valve of the one adjustable liquid storage device to close, and controlling the first output valve of the one adjustable liquid storage device to close, so as to control the one adjustable liquid storage device to close, and entering a pre-set refrigerant component adjustment mode to adjust the refrigerant circulation component 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 pre-set refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system, including: for the adjustable liquid storage device currently to be controlled, determining the refrigerant amount of the first part of the liquid storage body in the adjustable liquid storage device, that is, the first part of the refrigerant amount of the liquid storage body, and the refrigerant amount of the second part of the liquid storage body, that is, the second part of the refrigerant amount of the liquid storage body; determining the ratio of the first part of the refrigerant amount of the liquid storage body in the adjustable liquid storage device to the second part of the refrigerant amount of the liquid storage body as the refrigerant mixing ratio of the adjustable liquid storage device; determining the relationship between the refrigerant mixing ratio of the adjustable liquid storage device and the set ratio; if it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, exiting the pre-set 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 the adjustable liquid storage device is greater than the set ratio, the first output valve of the liquid storage body in the adjustable liquid storage device is controlled to open to adjust the refrigerant circulation component of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, the first output valve of the liquid storage body in the adjustable liquid storage device is controlled to close, and the preset refrigerant composition adjustment mode is exited to stop adjusting the refrigerant circulation component of the refrigerant circulation system; if it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is less than the set ratio, the second output valve of the liquid storage body in the adjustable liquid storage device is controlled to open to adjust the refrigerant circulation component 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 controlled to close, and the preset refrigerant composition adjustment mode is exited to stop adjusting the refrigerant circulation component of the refrigerant circulation system.

[0017] In some embodiments, in each of the adjustable liquid storage devices, the reservoir body has a top inlet and a top outlet, as well as a bottom outlet; wherein, 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.

[0018] In some embodiments, when the refrigerant composition regulating device includes more than one adjustable liquid storage device, the more than one adjustable liquid storage device includes 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, so as to regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system, including: determining the environmental operating condition regulation degree of the air-conditioning equipment according to the actual environmental operating conditions of the air-conditioning equipment, recorded as the first regulation degree of the air-conditioning equipment; determining whether the first regulation degree of the air-conditioning equipment is equal to a first set degree; if it is determined that the first regulation degree of the air-conditioning equipment is not equal to the first set degree, controlling the refrigerant circulation system to maintain current operation; if it is determined that the first regulation degree of the air-conditioning equipment is equal to the first set degree, controlling the refrigerant composition regulating device, that is, controlling the first liquid storage device, to preliminarily 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 preliminarily regulate the refrigerant circulation amount 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 regulate the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system according to the actual environmental working conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor. It also includes: after controlling the first liquid storage device to preliminarily regulate the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to preliminarily regulate the refrigerant circulation volume of the refrigerant circulation system, determining the degree of environmental working condition regulation of the air-conditioning equipment according to the actual environmental working conditions of the air-conditioning equipment, which is recorded as the air-conditioning regulating device. The second adjustment degree of the throttling device; determining whether the environmental working condition adjustment degree of the air-conditioning device is equal to the second set degree, and the second set degree is greater than the first set degree; if it is determined that the environmental working condition adjustment degree of the air-conditioning device is not equal to the second set degree, the refrigerant circulation system is controlled to maintain the current operation; if it is determined that the environmental working condition adjustment degree of the air-conditioning device is equal to the second set degree, the refrigerant composition adjustment device, 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 amount of the refrigerant circulation system.

[0020] In some embodiments, the control unit controls the throttling device according to the actual exhaust temperature of the compressor, including: determining whether the actual exhaust temperature of the compressor is already within the set exhaust temperature range; if it is determined that the actual exhaust temperature of the compressor is already within the set exhaust temperature range, controlling the refrigerant circulation system to maintain the current operation; if it is determined that the actual exhaust temperature of the compressor is not within the set exhaust temperature range, controlling the throttling device to adjust the actual exhaust temperature of the compressor; determining whether the adjusted actual exhaust temperature of the compressor is already within the set exhaust temperature range; if it is determined that the adjusted actual exhaust temperature of the compressor is already within the set exhaust temperature range, controlling the refrigerant circulation system to maintain the current operation; if it is determined that the adjusted actual exhaust temperature of the compressor is not within the set exhaust temperature range, returning to continue to control the throttling device to continue to adjust the actual exhaust temperature of the compressor until the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range.

[0021] In accordance with the above-mentioned device, the present invention provides an air conditioning device on another aspect, including: the control device of the air conditioning device described above.

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

[0023] In accordance with the above method, the present invention further provides a storage medium comprising a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the above-mentioned method for controlling the air conditioning device.

[0024] In accordance with the above method, the present invention further provides a computer program product, comprising a computer program, which implements the steps of the above method for controlling an air conditioning device when executed by a processor.

[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 throttle valve), and a normally open liquid storage device (such as a normally open liquid storage device), the exhaust port of the compressor returns to the intake 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; 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 storage device; the refrigerant composition regulating device has at least one adjustable liquid storage device (such as the first liquid storage device C1 and the shut-off valves on its inlet and outlet pipelines), and two or more adjustable liquid storage devices are connected in parallel, and the adjustment degrees are different; when the air conditioning equipment is running Under the present invention, according to the degree of proximity between the environmental conditions of the operation of the air-conditioning equipment and the environmental conditions set by the user (such as degree D) and the exhaust temperature of the compressor (such as exhaust temperature T), the operation of the refrigerant composition regulating device (such as the opening and closing of at least one adjustable liquid storage device, the operating time when each adjustable liquid storage device is opened, etc.) is controlled, or the operation of the refrigerant composition regulating device (such as the opening and closing of at least one adjustable liquid storage device, the operating time when each adjustable liquid storage device is opened, etc.) and the opening of the throttling device are controlled to adjust the refrigerant circulation amount of the air-conditioning equipment; thereby, by setting the refrigerant composition regulating device, the refrigerant circulation composition and / or refrigerant circulation amount of the air-conditioning equipment are adjusted, the frequent start and stop of the air-conditioning equipment is avoided, and the user's comfort experience is improved.

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

[0027] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A flow chart of an embodiment of a method for controlling an air conditioning device according to the present invention;

[0029] Figure 2 A flow chart of an embodiment of the method of the present invention for controlling at least one of the adjustable liquid storage devices in the refrigerant composition regulating device to regulate the refrigerant circulating composition of the refrigerant circulation system;

[0030] Figure 3 A flow chart of an embodiment of the method of the present invention for entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system;

[0031] Figure 4 A flow chart of an embodiment of the method of the present invention for preliminarily adjusting the refrigerant circulation components and / or the refrigerant circulation amount of the refrigerant circulation system;

[0032] Figure 5 A flow chart of an embodiment of the method of the present invention for further adjusting the refrigerant circulation components and / or the refrigerant circulation amount of the refrigerant circulation system;

[0033] Figure 6 1 is a flow chart of an embodiment of controlling the throttling device according to the actual exhaust temperature of the compressor in the method of the present invention;

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

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

[0036] Figure 9 Schematic diagram of a flow chart of a control method for a control system of an air conditioning device (such as an air conditioning refrigeration system) with multiple liquid reservoirs (such as more than two liquid reservoirs) according to the present invention;

[0037] Figure 10 Schematic diagram of a flow chart of a refrigerant component adjustment method in a control method of an air conditioning system (such as an air conditioning refrigeration system) with multiple liquid reservoirs (such as more than two liquid reservoirs) according to the present invention;

[0038] Figure 11 Schematic diagram of the structure of liquid reservoir refrigerant stratification in a control method of a control system for air conditioning equipment (such as an air conditioning refrigeration system) with multiple liquid reservoirs (such as more than two liquid reservoirs) of the present invention;

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

[0040] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0041] 102 - acquisition unit; 104 - control unit. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] Considering that the refrigerant circulation volume cannot be adjusted during the operation of air conditioning equipment (such as air conditioners), the air conditioning equipment (such as air conditioners) has too much refrigerant under certain working conditions, causing the control system of the air conditioning equipment to start and stop frequently, affecting the user's comfort experience. At the same time, for some mixed refrigerants (i.e. refrigerants), liquid stratification is often prone to occur under certain working conditions and is stored in the liquid reservoir, resulting in the actual operating refrigerant composition of the system often being inconsistent with the ideal state. For example, R407C refrigerant (i.e. R-407C mixed refrigerant) is a mixture of R32 refrigerant, R125 refrigerant and R134a refrigerant in a certain proportion. It is an environmentally friendly refrigerant that does not damage the ozone layer. For the R-407C mixed refrigerant, R-32 refrigerant, R-125 refrigerant and R-134a refrigerant account for 15%, 40% and 45% respectively, and the condensation temperatures are -26.4℃, -4.4℃ and -26.5℃ respectively. The evaporation temperature and condensation temperature are different. The condensation temperature of R-125 refrigerant is higher, and more is stored in the liquid storage tank (i.e., the liquid receiver), causing the composition of the R-407C mixed refrigerant to change during operation, making the effect of the R-407C mixed refrigerant worse.

[0044] Especially for fixed-frequency air conditioning control systems, when actual operating conditions approach those set by the user, the air conditioner often starts and stops frequently within the originally set mode, resulting in a poor user experience and high power consumption. For example, some control logic disables the refrigeration system when operating conditions reach the user-set ambient conditions, saving energy. If a fixed-frequency air conditioning control system uses a mixed refrigerant, liquid stratification may occur in the reservoir under certain operating conditions. The actual refrigerant composition of the fixed-frequency air conditioning control system often deviates significantly from the ideal one. Due to the different refrigerant characteristics, the fixed-frequency air conditioning control system is often unable to perform optimally.

[0045] A related proposal provides an air conditioning system with a variable volume liquid storage tank device. This system consists of a bladder nested within a liquid storage tank, connected to a cylinder and piston. Adjusting the piston changes the size of the bladder, thereby varying the volume of the liquid storage tank. However, this variable volume liquid storage tank device has drawbacks such as a complex structure and high component precision requirements, and cannot be adjusted to suit different refrigerant compositions.

[0046] Therefore, the solution of the present invention proposes a control method for air conditioning equipment (such as air conditioning). 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 equipment with multiple liquid reservoirs (such as more than two liquid reservoirs). By changing the refrigerant circulation volume of the control system of the air conditioning equipment and having a simple structure, it can at least avoid frequent start and stop of the control system of the air conditioning equipment, thereby improving the user's comfort experience.

[0047] According to an embodiment of the present invention, a method for controlling an air conditioning device is provided. Figure 1 The flowchart of one embodiment of the method of the present invention is shown. The air conditioning equipment 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 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 storage device, and is used to regulate the refrigerant circulation amount of the refrigerant circulation system. That is to say, the air conditioning equipment has a compressor, a first heat exchanger, a second heat exchanger, a throttling device, a normally open liquid storage device and a refrigerant composition regulating device, and the compressor, the first heat exchanger, the second heat exchanger, the throttling device and the normally open liquid storage device constitute a refrigerant circulation system, such as the exhaust port of the compressor returns to the intake 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; the refrigerant composition regulating device is connected in parallel with the normally open liquid storage device, and is used to regulate the refrigerant circulation amount of the refrigerant circulation system. In the scheme of the present invention, Figure 1 As shown, the control method of the air conditioning equipment includes: steps S110 to S120.

[0048] At step S110, when the air-conditioning equipment is turned on and running, the actual environmental conditions of the air-conditioning equipment are obtained, specifically, the actual environmental conditions of the environment in which the air-conditioning equipment is located are obtained, and the set environmental conditions of the environment in which the air-conditioning equipment is located set by the user are obtained; and, the actual exhaust temperature of the compressor is obtained, and the pre-set target exhaust temperature of the compressor is obtained.

[0049] At step S120, when the air conditioning equipment is in operation, the refrigerant composition regulating device, or the refrigerant composition regulating device and the throttling device, are controlled based on the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor to regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system. The refrigerant circulation composition of the refrigerant circulation system refers to the composition of the refrigerant circulating in the refrigerant circulation system and the amount of the refrigerant circulating in the refrigerant circulation system.

[0050] The solution of the present invention proposes a control scheme for a control system (such as an air-conditioning refrigeration system) of an air-conditioning equipment with multiple liquid storage tanks (such as more than two liquid storage tanks). A refrigerant circulation quantity adjustment refrigeration system is provided. By adjusting the refrigerant circulation quantity, the refrigerant circulation quantity of the control system of the air-conditioning equipment can be changed. The solution has a simple structure and can also propose a solution to the refrigerant composition problem, at least avoiding frequent start and stop of the control system of the air-conditioning equipment, thereby improving the user's comfort experience.

[0051] In some embodiments, the refrigerant composition adjustment device includes an adjustable liquid storage device, and the number of such adjustable liquid storage devices is one or more. When the number of such adjustable liquid storage devices is two or more, the adjustment levels 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 passes through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid storage device, and then returns to the intake port of the compressor. Each of the one or more adjustable liquid storage devices is connected in parallel with the normally open liquid storage device.

[0052] In step S120, the refrigerant composition regulating device is controlled, including: 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 after at least one of the adjustable liquid storage devices is opened, and executing a pre-set refrigerant composition regulating mode to adjust the refrigerant circulating composition of the refrigerant circulation system.

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

[0054] In the solution of the present invention, a simple refrigerant circulation volume regulating refrigeration system is designed to regulate the refrigerant circulation volume and solve the problems of frequent start and stop and excessive power consumption of 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 reservoir body, an input valve, a first output valve, and a second output valve, the liquid reservoir body is such as the first liquid reservoir C1, the input valve is such as the stop valve F1, the first output valve is such as the stop valve F11, and the second output valve is such as the stop valve F12; wherein, the liquid reservoir body has an input pipeline, a first output pipeline and a second output pipeline, the input valve is arranged on the input pipeline of the liquid reservoir body, the first output valve is arranged on the first output pipeline of the liquid reservoir body, and the second output valve is arranged on the second output pipeline of the liquid reservoir 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 operating time of at least one of the adjustable liquid storage devices after being opened, are controlled, and a pre-set refrigerant composition regulating mode is executed to regulate the specific process of the refrigerant circulation composition of the refrigerant circulation system. Please refer to the following exemplary description.

[0057] The following combination Figure 2 The flowchart of an embodiment of controlling at least one of the adjustable liquid storage devices in the refrigerant composition regulating device to regulate the refrigerant circulating composition of the refrigerant circulation system in the method of the present invention further illustrates the specific process of controlling at least one of the adjustable liquid storage devices in the refrigerant composition regulating device to regulate the refrigerant circulating composition of the refrigerant circulation system in step S120, including: steps S210 to S230.

[0058] In step S210, for at least one of the adjustable liquid storage devices in the refrigerant component regulating device, determine one of the adjustable liquid storage devices that currently needs to be controlled; wherein, the one of the adjustable liquid storage devices that currently needs to be controlled can be any one of the at least one adjustable liquid storage device, or can be one of the adjustable liquid storage devices selected according to a pre-set selection rule.

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

[0060] In step S230, after the adjustable liquid storage device is opened and operated 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 to close the adjustable liquid storage device. The system then enters a preset refrigerant composition adjustment mode to adjust the refrigerant circulating composition of the refrigerant circulation system. The first set time is, for example, t0 min.

[0061] Figure 9 The present invention is a 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 more than two liquid reservoirs). Figure 9 A refrigeration system control method of the present invention can be displayed. Figure 9In the equation, D represents the degree of closeness between the ambient working condition and the ambient working condition set by the user. For example, the ambient working condition is A when the machine is just turned on, the ambient working condition set by the user is C, and the ambient working condition is B when the control system of the air conditioning equipment (such as the air conditioning refrigeration system) is running. Then D = (AB) / (AC), which can be expressed as a percentage. The closer it is to 1, the closer the ambient working condition is to the ambient working condition set by the user. P and Q are respectively one of the degrees, and the degree of Q is higher than P. T represents the exhaust temperature of the compressor when the control system of the air conditioning equipment (such as the air conditioning refrigeration system) is actually running. T1 represents the optimal exhaust temperature value when the control system of the air conditioning equipment (such as the air conditioning refrigeration system) is in operation under the refrigeration system. T1 is generally set manually in advance according to the system configuration. t0 represents the length of time that the control system of the air conditioning equipment (such as the air conditioning refrigeration system) needs to be run after the valve of any of the two liquid reservoirs (i.e., the first liquid reservoir C1 and the second liquid reservoir C2) is opened. F1, F11, F2, and F21 are the stop valve numbers, corresponding to Figure 8 The appropriate shut-off valve in the tank. For T1, the optimal exhaust temperature range varies for different refrigerants. For example, the optimal exhaust temperature for R410A is generally between 80°C and 100°C, while the optimal exhaust temperature for R407C is generally recommended to be controlled between 100°C and 130°C. t0 refers to the time it takes for the refrigerant to stabilize within the tank. The ideal range for t0 varies between different air conditioning systems. For dehumidifiers or small household air conditioners, 3 to 6 minutes is generally sufficient, while for medium-sized air conditioning systems, 10 to 20 minutes is recommended.

[0062] In the solution of the present invention, see Figure 8 and Figure 9 The example shown adopts a refrigerant circulation volume regulation refrigeration system with a simple structure, which solves the problem of frequent start and stop of the control system of the air conditioning equipment (such as the air conditioning refrigeration system). It can change the refrigerant circulation volume of the control system of the air conditioning equipment and has a simple structure, so as to at least avoid the frequent start and stop of the control system of the 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 reservoir body is divided into a first part and a second part; when the liquid reservoir body is placed vertically, the first part is the upper part and the second part is the lower part.

[0064] In step S230 , a preset refrigerant composition adjustment mode is entered to adjust the refrigerant circulation composition of the refrigerant circulation system. For a specific process, see the following exemplary description.

[0065] The following combination Figure 3The flowchart of an embodiment of the method of the present invention for entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system further illustrates the specific process of entering the preset 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 currently needs to be controlled, after controlling the one of the adjustable liquid storage devices to be closed, determine the refrigerant amount of the first part of the liquid storage body in the one of the adjustable liquid storage devices, that is, the first part of the refrigerant amount of the liquid storage body, and the refrigerant amount of the second part of the liquid storage body, that is, the second part of the refrigerant amount of the liquid storage body; wherein, the refrigerant amount of the first part of the liquid storage body is such as the refrigerant amount u, and the refrigerant amount of the second part of the liquid storage body is such as the refrigerant amount v.

[0067] Step S320 , determining the ratio of the first portion of the refrigerant volume of the liquid storage body in the adjustable liquid storage device to the second portion of the refrigerant volume of the liquid storage body as the refrigerant mixing ratio of the adjustable liquid storage device.

[0068] Step S330, determining 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, the first output valve of the liquid storage body in the adjustable liquid storage device is controlled to open to adjust the refrigerant circulation component of the refrigerant circulation system; until the adjusted refrigerant mixing ratio of the adjustable liquid storage device is equal to the set ratio, the first output valve of the liquid storage body in the adjustable liquid storage device is controlled to close, and the pre-set refrigerant composition adjustment mode is exited to stop adjusting the refrigerant circulation component of the refrigerant circulation system.

[0071] Step S360: If it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is less than the set ratio, the second output valve of the liquid storage body in the adjustable liquid storage device is controlled to open to adjust the refrigerant circulation component 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 controlled to close, and the pre-set refrigerant composition adjustment mode is exited to stop adjusting the refrigerant circulation component of the refrigerant circulation system.

[0072] Figure 10 The present invention is a flow chart of a refrigerant component adjustment method in a control method of a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid reservoirs (such as more than two liquid reservoirs). Figure 10 Can display the refrigerant composition adjustment method, Figure 10 In the formula ( ), u represents the upper refrigerant component in the reservoir (i.e., either the first reservoir C1 or the second reservoir C2), v represents the lower refrigerant component in the reservoir (i.e., either the first reservoir C1 or the second reservoir C2), u / v represents the refrigerant composition ratio (i.e., the ratio of the upper refrigerant component to the lower refrigerant component in either the first reservoir C1 or the second reservoir C2), and i represents the optimal refrigerant composition ratio. Fx1 represents the valve for the upper refrigerant in the first or second reservoir C1 (F11 for the first reservoir C1, F21 for the second reservoir C2), and Fx2 represents the valve for the lower refrigerant in the first or second reservoir C1 (F12 for the first reservoir C1, F22 for the second reservoir C2).

[0073] In the solution of the present invention, see Figure 10 In the example shown, for a mixed refrigerant, the refrigerant circulation amount and the operating composition of the mixed refrigerant can be adjusted to achieve the optimal state through the refrigerant stratification phenomenon in the liquid storage tank.

[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 and a top outlet, as well as a bottom outlet; wherein, when the liquid storage body is placed vertically, the input pipeline of the liquid storage body is connected to the top inlet of the liquid storage body, the first output pipeline of the liquid storage body is connected to the top outlet of the liquid storage body, and the second output pipeline 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 and a top outlet, as well as a bottom outlet, the input pipeline inputs into the top inlet of the liquid storage body (such as the input pipeline is connected from the pipeline between the first heat exchanger and the normally open liquid storage body to the top inlet of the liquid storage body), the first output pipeline outputs from the top outlet of the liquid storage body to the exhaust port of the compressor, and the second output pipeline outputs from the bottom outlet of the liquid storage body to the exhaust port of the compressor.

[0075] Figure 8 The present invention is a schematic structural diagram of a control system (such as an air conditioning refrigeration system) for air conditioning equipment with multiple liquid reservoirs (such as more than two liquid reservoirs). Figure 8 A refrigeration system of the present invention can be shown, which, in addition to the four major components of the refrigeration system (i.e., compressor, evaporator, condenser, and throttle valve) and the normally open liquid reservoir, also has two additional liquid reservoirs (i.e., a first liquid reservoir C1 and a second liquid reservoir C2). The two added liquid reservoirs (i.e., the first liquid reservoir C1 and the second liquid reservoir C2) are used to adjust the system refrigerant circulation volume, and when the mixed liquid refrigerant is layered in the upper and lower layers of each of the two added liquid reservoirs (i.e., the first liquid reservoir C1 and the second liquid reservoir C2), the upper and lower parts of each liquid reservoir are connected to pipelines and valves. For example: a stop valve F1 and a stop valve F11 are provided on the upper connecting pipeline of the first liquid reservoir C1, and a stop valve F12 is provided on the lower connecting pipeline of the first liquid reservoir C1; a stop valve F2 and a stop valve F21 are provided on the upper connecting pipeline of the second liquid reservoir C2, and a stop valve F22 is provided on the lower connecting pipeline of the second liquid reservoir C2, which are used to replenish the refrigerant components in operation separately through the first liquid reservoir C1 and the second liquid reservoir C2, so that the composition of the refrigerant in operation is optimal.

[0076] Among them, the first liquid reservoir C1 and the second liquid reservoir C2 are needed to adjust the system refrigerant circulation volume and the system refrigerant composition. The stop valve F1, stop valve F11, and stop valve F12 are used together with the first liquid reservoir C1, and the stop valve F2, stop valve F21, and stop valve F22 are used together with the second liquid reservoir C2.

[0077] Figure 11The present invention is a schematic structural diagram of liquid reservoir refrigerant stratification in a control method of a control system (such as an air conditioning refrigeration system) of an air conditioning device with multiple liquid reservoirs (such as more than two liquid reservoirs). Figure 11 The refrigerant stratification situation in the liquid storage device (ie, any one of the first liquid storage device C1 and the second liquid storage device C2) can be displayed.

[0078] Figure 12 This is a structural schematic diagram of a control system corresponding to a control method of a control system of an air conditioning device (such as an air conditioning refrigeration system) with multiple liquid reservoirs (such as more than two liquid reservoirs) according to the present invention. Figure 12 It is a block diagram of the control system, indicating that the control system consists of an acquisition module, a calculation module and a control module.

[0079] The refrigerant circulation quantity regulating refrigeration system proposed in the solution of the present invention adjusts the composition of the mixed refrigerant (i.e., mixed refrigerant component adjustment), and has a simple structure and closed-loop control logic; thereby, the refrigerant circulation quantity of the refrigeration system can be adjusted, and the composition of the mixed refrigerant can be adjusted, and the structure is simple, without the need for too many precision parts.

[0080] In some embodiments, when the refrigerant composition regulating device includes more than one adjustable liquid storage device, the more than one adjustable liquid storage device includes 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] In step S120, the refrigerant composition regulating device is controlled according to the actual environmental conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor, or the refrigerant composition regulating device and the throttling device are controlled to regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system, including: a process of preliminarily regulating the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system.

[0082] The following combination Figure 4 The flowchart of an embodiment of the method of the present invention for preliminarily adjusting the refrigerant circulation components and / or refrigerant circulation volume of the refrigerant circulation system further illustrates the specific process of preliminarily adjusting the refrigerant circulation components and / or refrigerant circulation volume of the refrigerant circulation system in step S120, including: steps S410 to S450.

[0083] Step S410, determining the degree of adjustment of the environmental conditions of the air conditioning equipment according to the actual environmental conditions of the air conditioning equipment, recorded as the first adjustment degree of the air conditioning equipment, such as the degree of closeness D between the environmental conditions determined for the first time and the environmental conditions set by the user. Specifically, the actual environmental operating condition of the air conditioning equipment obtained when the air conditioning equipment starts to operate is recorded as the initial environmental operating condition of the air conditioning equipment, and the actual environmental operating condition of the air conditioning equipment obtained after the air conditioning equipment has been running for a second set time is recorded as the current environmental operating condition of the air conditioning equipment; the absolute value of the difference between the initial environmental operating condition of the air conditioning equipment and the current environmental operating condition of the air conditioning equipment is recorded as the first operating condition difference, the absolute value of the difference between the initial environmental operating condition of the air conditioning equipment and the set environmental operating condition of the air conditioning equipment 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 of distance between the actual environmental operating condition of the air conditioning equipment and the set environmental operating condition of the air conditioning equipment, recorded as the environmental operating condition adjustment degree of the air conditioning equipment, specifically recorded as the first adjustment degree of the air conditioning equipment, such as a degree of closeness D between the environmental operating condition obtained by the first determination and the environmental operating condition set by the user; wherein the initial environmental operating condition of the air conditioning equipment is such as operating condition A, the current environmental operating condition of the air conditioning equipment is such as operating condition B, and the set environmental operating condition of the air conditioning equipment is such as operating condition C.

[0084] Step S420: Determine whether the first adjustment degree of the air conditioning equipment is equal to a first set degree; wherein the first set degree is, for example, degree P.

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

[0086] In step S440 , if it is determined that the first adjustment degree of the air conditioning equipment is equal to the first set degree, the refrigerant composition adjustment device, ie, the first liquid storage device, is controlled to preliminarily adjust the refrigerant circulation composition of the refrigerant circulation system.

[0087] Step S450, after controlling the first liquid storage device to preliminarily adjust the refrigerant circulation component of the refrigerant circulation system, control the throttling device according to the actual exhaust temperature of the compressor to preliminarily adjust the refrigerant circulation amount of the refrigerant circulation system.

[0088] The following combination Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 The example shown is a dual refrigerant mixed refrigerant system As an example, the specific implementation method of the solution of the present invention is exemplified. Increasing the number of liquid receivers does not necessarily mean the number of refrigerant components in the mixture is the same. More liquid receivers simply means a more detailed and precise adjustment, and it has no necessary relationship to the number of refrigerant components.

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

[0090] Step 11: The air conditioner operates normally, then proceed to step 12.

[0091] Step 12: During initial operation (i.e., before the prototype is running), the ambient condition is A, the user-set ambient condition is C, and the ambient condition during prototype operation is B. D = (AB) / (AC) is used to represent the degree to which the ambient condition is close to the user-set ambient condition. The closer D is to 1, the closer the ambient condition is to the user-set ambient condition. Determine whether D = P: If so, 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 sensor built into the machine.

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

[0093] Step 14: When D=P (P is preferably 40% to 60%), it indicates that the adjustment of the environmental conditions has reached a certain stage, and the refrigerant circulation volume can be appropriately reduced to reduce system power consumption, and then step 15 is executed.

[0094] Therefore, in step 14, if D=P is satisfied, the stop valve F1 and the stop valve F11 are opened to allow part of the refrigerant in the refrigerant circulation system to enter the first liquid reservoir C1. After running for t0min (the longer t0 is, the more refrigerant enters the first liquid reservoir C1, and t0 is preferably 3min to 6min), the stop valve F1 and the stop valve F11 are closed to enter the refrigerant component adjustment system, that is, enter the refrigerant composition adjustment mode to adjust the optimal refrigerant component ratio. In the refrigerant composition adjustment mode, the specific operations are all centered around the optimal refrigerant component ratio i (i.e., the ratio that gives full play to the best performance of the refrigerant). For details, please refer to Figure 10 Example shown.

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

[0096] Step 31: Open the stop valve F1 and the stop valve F11 to allow part of the refrigerant in the refrigerant circulation system to enter the first liquid storage tank C1. After running for t0min, close the stop valve F1 and the stop valve F11, detect the refrigerant amount u in the upper layer and the refrigerant amount v in the lower layer of the first liquid storage tank C1, and then execute step 32.

[0097] When entering the refrigerant composition adjustment system in step 14, the refrigerant condenses and stratifies. The upper refrigerant volume u and the lower refrigerant volume v are collected through the upper and lower ports, respectively, and then delivered to the system. Specifically, the liquid refrigerant in the first liquid reservoir C1 is stratified, with the upper refrigerant volume u and the lower refrigerant volume v in the first liquid reservoir C1 being stratified.

[0098] Step 32 then determines whether u / v = i (i represents the optimal refrigerant mixing ratio. The optimal mixing ratio varies for different refrigerants and can be set within a range of values depending on the actual situation). If so, the refrigerant composition adjustment system can be exited, as the optimal ratio has been achieved and no further adjustment is required. If not, step 33 is executed to determine whether u / v is greater than i. i is not necessarily a range; for example, for the mixed refrigerant R410A, the optimal value of i is 50%.

[0099] Step 33: Determine whether u / v>i is satisfied. If so, it indicates that the storage capacity of u is too large, and it is necessary to open the stop valve F11 to release some of the upper layer refrigerant into the system until u / v=i. Only then close the stop valve F11 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required. Similarly, if not, open the stop valve F12 to release some of the lower layer refrigerant into the system until u / v=i. Only then close the stop valve F12 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required.

[0100] In the solution of the present invention, see Figure 8 、 Figure 9 and Figure 10 In the example shown, the refrigerant composition regulating device is controlled, or the refrigerant composition regulating device and the throttling device are controlled, according to the actual environmental operating conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor, so as to preliminarily adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, thereby solving the problem of composition change of the mixed refrigerant during operation, that is, solving the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state, and enabling the mixed refrigerant to maintain its original composition unchanged during operation, thereby improving the effect of the mixed refrigerant.

[0101] In some embodiments, step S120 controls the refrigerant composition regulating device, or controls the refrigerant composition regulating device and the throttling device according to the actual environmental conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor to regulate the refrigerant circulation composition and / or the refrigerant circulation amount of the refrigerant circulation system, and also includes: a process of further regulating the refrigerant circulation composition and / or the refrigerant circulation amount of the refrigerant circulation system.

[0102] The following combination Figure 5The flowchart of an embodiment of further adjusting the refrigerant circulation components and / or refrigerant circulation volume of the refrigerant circulation system in the method of the present invention further illustrates the specific process of further adjusting the refrigerant circulation components and / or refrigerant circulation volume of the refrigerant circulation system in step S120, including: steps S510 to S550.

[0103] Step S510, after controlling the first liquid storage device to preliminarily adjust the refrigerant circulation component of the refrigerant circulation system, and controlling the throttling device to preliminarily adjust the refrigerant circulation volume of the refrigerant circulation system, determine the degree of adjustment of the environmental conditions of the air conditioning equipment according to the actual environmental conditions of the air conditioning equipment, and record it as the second adjustment degree of the air conditioning equipment, such as determining again the degree of proximity D between the obtained environmental conditions and the environmental conditions set by the user. Specifically, the actual environmental conditions of the air conditioning equipment obtained when the air conditioning equipment starts to operate 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 of the air conditioning equipment and the current environmental conditions of the air conditioning equipment is recorded as the first operating condition difference, and the absolute value of the difference between the initial environmental conditions of the air conditioning equipment and the set environmental conditions of the air conditioning equipment 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 of distance between the actual environmental operating condition of the air conditioning equipment and the set environmental operating condition of the air conditioning equipment, which is recorded as the environmental operating condition adjustment degree of the air conditioning equipment, specifically as the second adjustment degree of the air conditioning equipment, such as the degree of closeness D between the environmental operating condition obtained again and the environmental condition set by the user; wherein, the initial environmental operating condition of the air conditioning equipment is such as operating condition A, the current environmental operating condition of the air conditioning equipment is such as operating condition B, the set environmental condition of the air conditioning equipment is such as operating condition C, and the third set time is greater than the second set time.

[0104] Step S520, determining whether the environmental condition adjustment degree of the air conditioning equipment is equal to a second set degree, and the second set degree is greater than the first set degree; wherein the second set degree is such as degree Q.

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

[0106] In step S540, if it is determined that the environmental condition adjustment degree of the air conditioning equipment is equal to the second set degree, 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.

[0107] Step S550, after controlling the second liquid storage device to further adjust the refrigerant circulation component of the refrigerant circulation system, controlling the throttling device according to the actual exhaust temperature of the compressor to further adjust the refrigerant circulation amount of the refrigerant circulation system.

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

[0109] Step 15: Enter the refrigerant composition adjustment system in step 14, adjust the refrigerant composition, exit the refrigerant composition adjustment system, and then proceed to determine whether T∈T1 is satisfied. If so, execute step 17; otherwise, execute step 16. T represents the exhaust temperature of the compressor in the system, and T1 represents the optimal exhaust temperature for the system (different systems and different refrigerants have different optimal values; for example, for R410A, the value is generally 80°C to 100°C).

[0110] Step 16: Determine whether T∈T1 is satisfied. If not, this indicates that the refrigerant circulation volume is low, causing the compressor's exhaust temperature to be too high. The throttle valve opening must be adjusted accordingly to lower the compressor's exhaust 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 can be adjusted by controlling its signal. If the exhaust temperature is too high, the opening is increased to increase the refrigerant circulation volume and lower the exhaust temperature.

[0111] Step 17: If the determination result is yes, the compressor can continue to operate according to the current state, and then execute step 18. In this way, the exhaust temperature of the compressor is controlled not to be too high, so as to ensure that the compressor operates in a better state.

[0112] Step 18, then proceed to determine whether D is equal to Q (Q is generally preferably 10% to 20%, this range is generally close to the environmental conditions set by the user, and only part of the refrigerant needs to be used to operate, so that the operating conditions gradually approach the set environmental conditions, which can avoid frequent start and stop of the prototype and reduce power consumption): If not, return to step 17 to continue operating according to the current state; if so, execute step 19 to continue adjusting the optimal refrigerant component ratio.

[0113] Step 19, further open the stop valve F2 and the stop valve F21 to allow the second liquid reservoir C2 to store part of the refrigerant, that is, open the stop valve F2 and the stop valve F21 to allow part of the refrigerant in the refrigerant circulation system to enter the second liquid reservoir C2, run for t0min (the longer t0 is, the more refrigerant enters the second liquid reservoir C2, t0 is preferably 3min to 6min), then close the stop valve F2 and the stop valve F21, enter the refrigerant component adjustment system, that is, enter the refrigerant composition adjustment mode, adjust the optimal refrigerant component ratio, and then execute step 20. In the refrigerant composition adjustment mode, the specific operations are all centered around the optimal refrigerant component ratio i (that is, the ratio that gives full play to the best performance of the refrigerant). For details, please refer to Figure 10 Example shown.

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

[0115] Step 34: Open the stop valve F2 and the stop valve F21 to allow part of the refrigerant in the refrigerant circulation system to enter the second liquid storage tank C2. After running for t0min, close the stop valve F2 and the stop valve F21, detect the refrigerant amount u in the upper layer and the refrigerant amount v in the lower layer of the second liquid storage tank C2, and then execute step 35.

[0116] When entering the refrigerant composition adjustment system in step 18, the refrigerant condenses and stratifies. The upper refrigerant volume u and the lower refrigerant volume v are collected through the upper and lower ports, respectively, and then delivered to the system. Specifically, the liquid refrigerant in the second liquid reservoir C2 is stratified, with the upper refrigerant volume u and the lower refrigerant volume v in the second liquid reservoir C2 being stratified.

[0117] Step 35 then determines whether u / v = i (i represents the optimal refrigerant mixing ratio, which varies for different refrigerants and can be set within a range of values depending on the actual situation). If so, the refrigerant composition adjustment system can be exited because the optimal ratio has been achieved and no further adjustment is required. If not, step 36 is executed to determine whether u / v is greater than i.

[0118] Step 36: Determine whether u / v>i is satisfied. If so, it indicates that the storage capacity of u is too large, and it is necessary to open the stop valve F21 to release some of the upper layer refrigerant into the system until u / v=i. Only then close the stop valve F21 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required. Similarly, if not, open the stop valve F22 to release some of the lower layer refrigerant into the system until u / v=i. Only then close the stop valve F22 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required.

[0119] Step 20: Enter the refrigerant composition adjustment system in step 19, adjust the refrigerant composition, exit the refrigerant composition adjustment system, and then proceed to determine whether T∈T1 is satisfied. If so, execute step 22; otherwise, execute step 21. T represents the exhaust temperature of the compressor in the system, and T1 represents the optimal exhaust temperature for the system (different systems and different refrigerants have different optimal values; for example, for R410A, the value is generally 80°C to 100°C).

[0120] Step 21: Determine whether T∈T1 is satisfied. If not, this indicates that the refrigerant circulation volume is low, causing the compressor's exhaust temperature to be too high. The throttle valve opening must be adjusted accordingly to lower the compressor's exhaust temperature until T∈T1 is satisfied. Then, step 22 is executed to continue operation in the current state. For example, a common throttle valve is an electronic expansion valve, whose opening can be adjusted by controlling its signal. If the exhaust temperature is too high, the opening is increased to increase the refrigerant circulation volume and lower the exhaust temperature.

[0121] Step 22: If the determination is yes, the compressor can continue to operate in its current state. This ensures that the compressor operates in an optimal state by controlling the compressor's exhaust temperature to a level below which it will not be too high. In the present invention, multiple determinations are made to determine whether T∈T1 is satisfied. The goal is to control the compressor's exhaust temperature to a level below which it will not be too high, ensuring that the compressor operates in an optimal state.

[0122] In the solution of the present invention, see Figure 8 、 Figure 9 and Figure 10 In the example shown, the refrigerant composition regulating device is controlled according to the actual environmental conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor, or the refrigerant composition regulating device and the throttling device are controlled to further regulate the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, thereby solving the problem of composition change of the mixed refrigerant during operation, that is, solving the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state, and enabling the mixed refrigerant to maintain its original composition unchanged during operation, thereby improving the effect of the mixed refrigerant.

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

[0124] The following combination Figure 6 The flowchart of an embodiment of controlling the throttling device according to the actual exhaust temperature of the compressor in the method of the present invention further illustrates the specific process of controlling the throttling device according to the actual exhaust temperature of the compressor in step S450 and / or step S550, including: step S610 to step S660.

[0125] In step S610 , it is determined whether the actual exhaust temperature of the compressor is within a 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 the current operation.

[0127] At 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 gas temperature of the compressor after adjustment is within a set exhaust gas temperature range.

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

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

[0131] Specifically, in step S450, after controlling the first liquid storage device to preliminarily adjust the refrigerant circulation component of the refrigerant circulation system, controlling the throttling device to preliminarily adjust the refrigerant circulation amount of the refrigerant circulation system according to the actual exhaust temperature of the compressor specifically includes:

[0132] After controlling the first liquid storage device to preliminarily adjust the refrigerant circulation component of the refrigerant circulation system, it is determined for the first time whether the actual exhaust temperature of the compressor is within the set exhaust temperature range; if it is determined for the first time that the actual exhaust temperature of the compressor is within the set exhaust temperature range, the refrigerant circulation system is controlled to maintain current operation; if it is determined for the first time 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. It is determined whether the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range; if it is determined that the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range, the refrigerant circulation system is controlled to maintain current operation; if it is determined that the adjusted actual exhaust temperature of the compressor is not within the set exhaust temperature range, the throttling device is returned to continue to control to continue to adjust the actual exhaust temperature of the compressor until the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range.

[0133] After controlling the second liquid storage device to further adjust the refrigerant circulation component of the refrigerant circulation system in step S550, controlling the throttling device according to the actual exhaust temperature of the compressor to further adjust the refrigerant circulation amount of the refrigerant circulation system specifically includes:

[0134] After controlling the second liquid storage device to further adjust the refrigerant circulation component of the refrigerant circulation system, determining for a second time whether the actual exhaust temperature of the compressor is within the set exhaust temperature range; if it is determined for the second time that the actual exhaust temperature of the compressor is within the set exhaust temperature range, controlling the refrigerant circulation system to maintain current operation; if it is determined for the second time that the actual exhaust temperature of the compressor is not within the set exhaust temperature range, controlling the throttling device to adjust the actual exhaust temperature of the compressor. Determining whether the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range; if it is determined that the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range, controlling the refrigerant circulation system to maintain current operation; if it is determined that the adjusted actual exhaust temperature of the compressor is not within the set exhaust temperature range, returning to continue controlling the throttling device to continue adjusting the actual exhaust temperature of the compressor until the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range.

[0135] It should be noted that the above embodiment only uses two additional liquid reservoirs as an example. In actual use, the number of liquid reservoirs is not limited to two, and can be three, four or more; the more liquid reservoirs there are, the more refrigerant can be stored, and the more stages the environmental conditions can be divided into in terms of how close they are to the user settings. For example, if there are three liquid reservoirs, they can be divided into three levels, such as 60% for the first level, 30% for the second level, and 10% for the third level. The finer the stages, the better the user experience. Of course, it is also possible to set up one liquid reservoir, but the comfort is not high; setting up two or more liquid reservoirs can further refine the proportion of the operating environmental conditions to the environmental conditions set by the user, providing a better experience.

[0136] The solution of the present invention proposes a control system (such as an air conditioning refrigeration system) for air conditioning equipment with multiple liquid reservoirs (such as more than two liquid reservoirs) and its control scheme, which has a simple structure and can adjust the refrigerant circulation volume and the operating components of the mixed refrigerant, reducing the refrigerant circulation volume to achieve the optimal state; thereby, the refrigeration system can be optimized, power consumption can be reduced, and user experience can be improved.

[0137] The technical solution of this embodiment is adopted, by targeting an air conditioning device (such as an air conditioner, a dehumidifier, 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 throttle valve), and a normally open liquid storage device (such as a normally open liquid storage device), the exhaust port of the compressor returns to the intake 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; 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 storage device; the refrigerant composition regulating device has at least one adjustable liquid storage device (such as the first liquid storage device C1 and the shut-off valves on its inlet and outlet pipelines), and two or more adjustable liquid storage devices are connected in parallel, and the adjustment degrees are different; when the air conditioning device is running In this case, according to the degree of proximity between the environmental conditions of the operation of the air-conditioning equipment and the environmental conditions set by the user (such as degree D) and the exhaust temperature of the compressor (such as exhaust temperature T), the operation of the refrigerant composition regulating device (such as the opening and closing of at least one adjustable liquid storage device, the operating time when each adjustable liquid storage device is opened, etc.) is controlled, or the operation of the refrigerant composition regulating device (such as the opening and closing of at least one adjustable liquid storage device, the operating time when each adjustable liquid storage device is opened, etc.) and the opening of the throttling device are controlled to adjust the refrigerant circulation amount of the air-conditioning equipment; thereby, by setting the refrigerant composition regulating device, the refrigerant circulation composition and / or refrigerant circulation amount of the air-conditioning equipment are adjusted, frequent start and 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 air conditioning equipment corresponding to the control method for air conditioning equipment is also provided. Figure 7 The structure diagram of one embodiment of the device of the present invention is shown. The air conditioning equipment 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 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 storage device, and is used to regulate the refrigerant circulation amount of the refrigerant circulation system. That is to say, the air conditioning equipment has a compressor, a first heat exchanger, a second heat exchanger, a throttling device, a normally open liquid storage device and a refrigerant composition regulating device, the compressor, the first heat exchanger, the second heat exchanger, the throttling device and the normally open liquid storage device constitute a refrigerant circulation system, such as the exhaust port of the compressor returns to the intake 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; the refrigerant composition regulating device is connected in parallel with the normally open liquid storage device, and is used to regulate the refrigerant circulation amount of the refrigerant circulation system. In the scheme of the present invention, 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 ambient operating conditions of the air conditioning equipment when the air conditioning equipment is powered on and running, specifically acquiring the actual ambient operating conditions of the environment in which the air conditioning equipment is located, as well as the set ambient operating conditions of the environment in which the air conditioning equipment is located set by the user; and acquiring the actual exhaust temperature of the compressor, as well as the preset target exhaust temperature of the compressor. The acquisition unit 102 may acquire the corresponding data from the acquisition module. The specific functions and processing of the acquisition unit 102 are described in step S110.

[0140] The control unit 104 is configured to control the refrigerant composition regulating device, or control the refrigerant composition regulating device and the throttling device, to regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system according to the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor when the air conditioning equipment is in operation. The refrigerant circulation composition of the refrigerant circulation system is the composition of the refrigerant circulating in the refrigerant circulation system and the amount of the refrigerant circulating in the refrigerant circulation system. The control unit 104 may include: Figure 12 The calculation module and control module shown. The specific functions and processing of the control unit 104 are shown in step S120.

[0141] The solution of the present invention proposes a control scheme for a control system (such as an air-conditioning refrigeration system) of an air-conditioning equipment with multiple liquid storage tanks (such as more than two liquid storage tanks). A refrigerant circulation quantity adjustment refrigeration system is provided. By adjusting the refrigerant circulation quantity, the refrigerant circulation quantity of the control system of the air-conditioning equipment can be changed. The solution has a simple structure and can also propose a solution to the refrigerant composition problem, at least avoiding frequent start and stop of the control system of the air-conditioning equipment, thereby improving the user's comfort experience.

[0142] In some embodiments, the refrigerant composition adjustment device includes an adjustable liquid storage device, and the number of such adjustable liquid storage devices is one or more. When the number of such adjustable liquid storage devices is two or more, the adjustment levels 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 passes through the second heat exchanger, the throttling device, the first heat exchanger, and the normally open liquid storage device, and then returns to the intake port of the compressor. Each of the one or more adjustable liquid storage devices is connected in parallel with the normally open liquid storage device.

[0143] The control unit 104 controls the refrigerant composition regulating device, including: the control unit 104 is specifically configured to control 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 being opened, and execute a pre-set refrigerant composition regulating mode to adjust the refrigerant circulation composition of the refrigerant circulation system.

[0144] Correspondingly, the control unit 104 controls the throttling device, including: the control unit 104 is further configured to control the opening of the throttling device to adjust the refrigerant circulation amount of the refrigerant circulation system.

[0145] In the solution of the present invention, a simple refrigerant circulation volume regulating refrigeration system is designed to regulate the refrigerant circulation volume and solve the problems of frequent start and stop and excessive power consumption of 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 reservoir body, an input valve, a first output valve, and a second output valve, the liquid reservoir body is such as the first liquid reservoir C1, the input valve is such as the stop valve F1, the first output valve is such as the stop valve F11, and the second output valve is such as the stop valve F12; wherein, the liquid reservoir body has an input pipeline, a first output pipeline and a second output pipeline, the input valve is arranged on the input pipeline of the liquid reservoir body, the first output valve is arranged on the first output pipeline of the liquid reservoir body, and the second output valve is arranged on the second output pipeline of the liquid reservoir 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 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, including:

[0148] The control unit 104 is further configured to determine, with respect to at least one of the adjustable liquid storage devices in the refrigerant composition adjustment device, one of the adjustable liquid storage devices that currently needs to be controlled. The adjustable liquid storage device that currently needs to be controlled may be any one of the at least one adjustable liquid storage device, or may 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, so as to control the opening of the adjustable liquid storage device. The specific functions and processing of the control unit 104 are also shown in step S220.

[0150] The control unit 104 is further configured to, after controlling the one adjustable liquid storage device to open, operate the one adjustable liquid storage device for a first set time, control the input valve of the one adjustable liquid storage device to close, and control the first output valve of the one adjustable liquid storage device to close, thereby controlling the one adjustable liquid storage device to close, and enter a preset refrigerant composition adjustment mode to adjust the refrigerant circulating composition of the refrigerant circulation system. The first set time is, for example, t0 min. The specific functions and processing of the control unit 104 are further described in step S230.

[0151] Figure 9 A refrigeration system control method of the present invention can be displayed. Figure 9 In the equation, D represents the degree of closeness between the ambient working condition and the ambient working condition set by the user. For example, the ambient working condition is A when the machine is just turned on, the ambient working condition set by the user is C, and the ambient working condition is B when the control system of the air conditioning equipment (such as the air conditioning refrigeration system) is running. Then D = (AB) / (AC), which can be expressed as a percentage. The closer it is to 1, the closer the ambient working condition is to the ambient working condition set by the user. P and Q are respectively one of the degrees, and the degree of Q is higher than P. T represents the exhaust temperature of the compressor when the control system of the air conditioning equipment (such as the air conditioning refrigeration system) is actually running. T1 represents the optimal exhaust temperature value when the control system of the air conditioning equipment (such as the air conditioning refrigeration system) is in operation under the refrigeration system. T1 is generally set manually in advance according to the system configuration. t0 represents the length of time that the control system of the air conditioning equipment (such as the air conditioning refrigeration system) needs to be run after the valve of any of the two liquid reservoirs (i.e., the first liquid reservoir C1 and the second liquid reservoir C2) is opened. F1, F11, F2, and F21 are the stop valve numbers, corresponding to Figure 8 The corresponding stop valve in.

[0152] In the solution of the present invention, see Figure 8 and Figure 9 The example shown adopts a refrigerant circulation volume regulation refrigeration system with a simple structure, which solves the problem of frequent start and stop of the control system of the air conditioning equipment (such as the air conditioning refrigeration system). It can change the refrigerant circulation volume of the control system of the air conditioning equipment and has a simple structure, so as to at least avoid the frequent start and stop of the control system of the 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 reservoir body is divided into a first part and a second part; when the liquid reservoir 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, after controlling the one adjustable liquid storage device to be controlled, determine, for the one adjustable liquid storage device currently to be controlled, a refrigerant quantity in the first portion of the liquid storage body, i.e., the first portion of the refrigerant quantity of the liquid storage body, and a refrigerant quantity in the second portion 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 exemplified by the refrigerant quantity u, and the second portion of the refrigerant quantity of the liquid storage body is exemplified by the refrigerant quantity v. 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 a ratio of the first portion of the refrigerant volume of the liquid reservoir body to the second portion of the refrigerant volume of the liquid reservoir body in the adjustable liquid storage device as the refrigerant mixing ratio of the adjustable liquid storage device. 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 a preset refrigerant composition adjustment mode if it determines that the refrigerant mixing ratio of the adjustable liquid storage device is equal to a set ratio, thereby stopping adjustment of the refrigerant circulating composition of the refrigerant circulation system. 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 the adjustable liquid storage device is greater than a set ratio, control the first output valve of the liquid storage body in the adjustable liquid storage device to open, thereby adjusting the refrigerant circulating composition of the refrigerant circulation system; and, until the adjusted refrigerant mixing ratio of the adjustable liquid storage device equals the set ratio, control the first output valve of the liquid storage body in the adjustable liquid storage device to close, exiting the pre-set refrigerant composition adjustment mode, thereby stopping adjustment of the refrigerant circulating 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 the adjustable liquid storage device is less than a set ratio, control the second output valve of the liquid storage body in the adjustable liquid storage device to open, thereby adjusting the refrigerant circulating composition of the refrigerant circulation system; and until the adjusted refrigerant mixing ratio of the adjustable liquid storage device equals the set ratio, control the second output valve of the liquid storage body in the adjustable liquid storage device to close, exit the pre-set refrigerant composition adjustment mode, and stop adjusting the refrigerant circulating 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 Can display the refrigerant composition adjustment method, Figure 10 In the formula ( ), u represents the upper refrigerant component in the reservoir (i.e., either the first reservoir C1 or the second reservoir C2), v represents the lower refrigerant component in the reservoir (i.e., either the first reservoir C1 or the second reservoir C2), u / v represents the refrigerant composition ratio (i.e., the ratio of the upper refrigerant component to the lower refrigerant component in either the first reservoir C1 or the second reservoir C2), and i represents the optimal refrigerant composition ratio. Fx1 represents the valve for the upper refrigerant in the first or second reservoir C1 (F11 for the first reservoir C1, F21 for the second reservoir C2), and Fx2 represents the valve for the lower refrigerant in the first or second reservoir C1 (F12 for the first reservoir C1, F22 for the second reservoir C2).

[0162] In the solution of the present invention, see Figure 10 In the example shown, for a mixed refrigerant, the refrigerant circulation amount and the operating composition of the mixed refrigerant can be adjusted to achieve the optimal state through the refrigerant stratification phenomenon in the liquid storage tank.

[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 and a top outlet, as well as a bottom outlet; wherein, when the liquid storage body is placed vertically, the input pipeline of the liquid storage body is connected to the top inlet of the liquid storage body, the first output pipeline of the liquid storage body is connected to the top outlet of the liquid storage body, and the second output pipeline 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 and a top outlet, as well as a bottom outlet, the input pipeline inputs into the top inlet of the liquid storage body (such as the input pipeline is connected from the pipeline between the first heat exchanger and the normally open liquid storage body to the top inlet of the liquid storage body), the first output pipeline outputs from the top outlet of the liquid storage body to the exhaust port of the compressor, and the second output pipeline outputs from the bottom outlet of the liquid storage body to the exhaust port of the compressor.

[0164] Figure 8 A refrigeration system of the present invention can be shown, which, in addition to the four major components of the refrigeration system (i.e., compressor, evaporator, condenser, and throttle valve) and the normally open liquid reservoir, also has two additional liquid reservoirs (i.e., a first liquid reservoir C1 and a second liquid reservoir C2). The two added liquid reservoirs (i.e., the first liquid reservoir C1 and the second liquid reservoir C2) are used to adjust the system refrigerant circulation volume, and when the mixed liquid refrigerant is layered in the upper and lower layers of each of the two added liquid reservoirs (i.e., the first liquid reservoir C1 and the second liquid reservoir C2), the upper and lower parts of each liquid reservoir are connected to pipelines and valves. For example: a stop valve F1 and a stop valve F11 are provided on the upper connecting pipeline of the first liquid reservoir C1, and a stop valve F12 is provided on the lower connecting pipeline of the first liquid reservoir C1; a stop valve F2 and a stop valve F21 are provided on the upper connecting pipeline of the second liquid reservoir C2, and a stop valve F22 is provided on the lower connecting pipeline of the second liquid reservoir C2, which are used to replenish the refrigerant components in operation separately through the first liquid reservoir C1 and the second liquid reservoir C2, so that the composition of the refrigerant in operation is optimal.

[0165] Among them, the first liquid reservoir C1 and the second liquid reservoir C2 are needed to adjust the system refrigerant circulation volume and the system refrigerant composition. The stop valve F1, stop valve F11, and stop valve F12 are used together with the first liquid reservoir C1, and the stop valve F2, stop valve F21, and stop valve F22 are used together with the second liquid reservoir C2.

[0166] Figure 11 The refrigerant stratification situation in the liquid storage device (ie, any one of the first liquid storage device C1 and the second liquid storage device C2) can be displayed.

[0167] The refrigerant circulation quantity regulating refrigeration system proposed in the solution of the present invention adjusts the composition of the mixed refrigerant (i.e., mixed refrigerant component adjustment), and has a simple structure and closed-loop control logic; thereby, the refrigerant circulation quantity of the refrigeration system can be adjusted, and the composition of the mixed refrigerant can be adjusted, and the structure is simple, without the need for too many precision parts.

[0168] In some embodiments, when the refrigerant composition regulating device includes more than one adjustable liquid storage device, the more than one adjustable liquid storage device includes 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 controls the refrigerant composition regulating device, or controls the refrigerant composition regulating device and the throttling device, to regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system according to the actual environmental conditions of the air conditioning equipment and the actual exhaust temperature of the compressor, including: a process of preliminarily regulating the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system, specifically as follows:

[0170] The control unit 104 is further configured to determine the degree of adjustment of the environmental conditions of the air conditioning equipment according to the actual environmental conditions of the air conditioning equipment, which is recorded as the first adjustment degree of the air conditioning equipment, such as the degree of proximity D between the environmental conditions obtained by the first determination and the environmental conditions set by the user. 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 to operate as the initial environmental conditions of the air conditioning equipment, and record the actual environmental conditions of the air conditioning equipment obtained after the air conditioning equipment has been running for a second set time as the current environmental conditions of the air conditioning equipment; record the absolute value of the difference between the initial environmental conditions of the air conditioning equipment and the current environmental conditions of the air conditioning equipment as the first operating condition difference, and record the difference between the initial environmental conditions of the air conditioning equipment and the set environmental conditions of the air conditioning equipment as the first operating condition difference. The absolute value of the difference between the first operating condition difference and the second operating condition 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 of proximity between the actual environmental operating condition of the air conditioning equipment and the set environmental operating condition of the air conditioning equipment, recorded as the environmental condition adjustment degree of the air conditioning equipment. Specifically, it is recorded as the first adjustment degree of the air conditioning equipment, such as a degree of proximity D between the environmental operating condition obtained by the initial determination and the environmental condition set by the user; wherein the initial environmental operating condition of the air conditioning equipment is such as operating condition A, the current environmental condition of the air conditioning equipment is such as operating condition B, and the set environmental condition of the air conditioning equipment is such as operating condition C. The specific functions and processing of the control unit 104 are also referred to 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, for example, 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 current operation if it is determined that the first adjustment degree of the air conditioning device is not equal to the first set degree. The specific functions and processing of the control unit 104 are also shown in step S430.

[0173] The control unit 104 is further configured to, upon determining 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., the first liquid storage device, to preliminarily adjust the refrigerant circulating composition of the refrigerant circulation system. The specific functions and processing of the control unit 104 are further described in step S440.

[0174] The control unit 104 is further configured to control the throttling device to preliminarily adjust the refrigerant circulation volume of the refrigerant circulation system based on the actual exhaust temperature of the compressor after controlling the first liquid storage device to preliminarily adjust the refrigerant circulation composition 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 of an air conditioning device with multiple liquid reservoirs (such as more than two liquid reservoirs) (such as an air conditioning refrigeration system) includes:

[0176] Step 11: The air conditioner operates normally, then proceed to step 12.

[0177] Step 12: During initial operation (i.e., before the prototype is running), the ambient condition is A, the user-set ambient condition is C, and the ambient condition during prototype operation is B. D = (AB) / (AC) is used to represent the degree to which the ambient condition is close to the user-set ambient condition. The closer D is to 1, the closer the ambient condition is to the user-set ambient condition. Determine whether D = P. If so, 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, proceed to step 14.

[0179] Step 14: When D=P (P is preferably 40% to 60%), it indicates that the adjustment of the environmental conditions has reached a certain stage, and the refrigerant circulation volume can be appropriately reduced to reduce system power consumption, and then step 15 is executed.

[0180] Therefore, in step 14, if D=P is satisfied, the stop valve F1 and the stop valve F11 are opened to allow part of the refrigerant in the refrigerant circulation system to enter the first liquid reservoir C1. After running for t0min (the longer t0 is, the more refrigerant enters the first liquid reservoir C1, and t0 is preferably 3min to 6min), the stop valve F1 and the stop valve F11 are closed to enter the refrigerant component adjustment system, that is, enter the refrigerant composition adjustment mode to adjust the optimal refrigerant component ratio. In the refrigerant composition adjustment mode, the specific operations are all centered around the optimal refrigerant component ratio i (i.e., the ratio that gives full play to the best performance of the refrigerant). For details, please refer to Figure 10 Example shown.

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

[0182] Step 31: Open the stop valve F1 and the stop valve F11 to allow part of the refrigerant in the refrigerant circulation system to enter the first liquid storage tank C1. After running for t0min, close the stop valve F1 and the stop valve F11, detect the refrigerant amount u in the upper layer and the refrigerant amount v in the lower layer of the first liquid storage tank C1, and then execute step 32.

[0183] When entering the refrigerant composition adjustment system in step 14, the refrigerant condenses and stratifies. The upper refrigerant volume u and the lower refrigerant volume v are collected through the upper and lower ports, respectively, and then delivered to the system. Specifically, the liquid refrigerant in the first liquid reservoir C1 is stratified, with the upper refrigerant volume u and the lower refrigerant volume v in the first liquid reservoir C1 being stratified.

[0184] Step 32 then determines whether u / v = i (i represents the optimal refrigerant mixing ratio, which varies for different refrigerants and can be set within a range of values depending on the actual situation). If so, the refrigerant composition adjustment system can be exited because the optimal ratio has been achieved and no further adjustment is required. If not, step 33 is executed to determine whether u / v is greater than i.

[0185] Step 33: Determine whether u / v>i is satisfied. If so, it indicates that the storage capacity of u is too large, and it is necessary to open the stop valve F11 to release some of the upper layer refrigerant into the system until u / v=i. Only then close the stop valve F11 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required. Similarly, if not, open the stop valve F12 to release some of the lower layer refrigerant into the system until u / v=i. Only then close the stop valve F12 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required.

[0186] In the solution of the present invention, see Figure 8 、 Figure 9 and Figure 10In the example shown, the refrigerant composition regulating device is controlled, or the refrigerant composition regulating device and the throttling device are controlled, according to the actual environmental operating conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor, so as to preliminarily adjust the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, thereby solving the problem of composition change of the mixed refrigerant during operation, that is, solving the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state, and enabling the mixed refrigerant to maintain its original composition unchanged 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, to regulate 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 control unit 104 further controls the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, specifically as follows:

[0188] The control unit 104 is further configured to, after controlling the first liquid storage device to preliminarily adjust the refrigerant circulation component of the refrigerant circulation system and controlling the throttling device to preliminarily adjust the refrigerant circulation volume of the refrigerant circulation system, determine the degree of adjustment of the environmental conditions of the air conditioning equipment according to the actual environmental conditions of the air conditioning equipment, and record it as the second adjustment degree of the air conditioning equipment, such as determining again the degree of proximity D between the obtained environmental conditions and the environmental conditions set by the user. 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 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; record the absolute value of the difference between the initial environmental conditions of the air conditioning equipment and the current environmental conditions of the air conditioning equipment as the first operating condition difference, and record the absolute value of the difference between the initial environmental conditions of the air conditioning equipment and the set environmental conditions of the air conditioning equipment as The first operating condition difference is used 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 of proximity between the actual environmental operating condition of the air conditioning device and the set environmental operating condition of the air conditioning device, recorded as the environmental condition adjustment degree of the air conditioning device, specifically as the second adjustment degree of the air conditioning device, such as a degree of proximity D between the environmental condition obtained again and the environmental condition set by the user; wherein the initial environmental condition of the air conditioning device is condition A, the current environmental condition of the air conditioning device is condition B, the set environmental condition of the air conditioning device is condition C, and the third set time is greater than the second set time. The specific functions and processing of the control unit 104 are also referred to in step S510.

[0189] The control unit 104 is further configured to determine whether the ambient operating condition adjustment degree of the air conditioning device is equal to a second set degree, which is greater than the first set degree; wherein the second set degree is, for example, degree 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 current operation if it is determined that the environmental condition adjustment degree of the air conditioning equipment is not equal to the second set degree. The specific functions and processing of the control unit 104 are also shown in step S530.

[0191] The control unit 104 is further configured to control the refrigerant composition adjustment device, i.e., the second liquid storage device, to further adjust the refrigerant composition of the refrigerant circulation system if it determines that the degree of adjustment of the ambient operating condition of the air conditioning equipment has reached a second set degree. The specific functions and processing of the 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 circulating composition of the refrigerant circulation system, control the throttling device based on the actual exhaust 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 further described in step S550.

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

[0194] Step 15: Enter the refrigerant composition adjustment system in step 14, adjust the refrigerant composition, exit the refrigerant composition adjustment system, and then proceed to determine whether T∈T1 is satisfied. If so, execute step 17; otherwise, execute step 16. T represents the exhaust temperature of the compressor in the system, and T1 represents the optimal exhaust temperature for the system (different systems and different refrigerants have different optimal values; for example, for R410A, the value is generally 80°C to 100°C).

[0195] Step 16, determine whether T∈T1 is satisfied: If the judgment is no, it means that the refrigerant circulation volume is small, causing the exhaust temperature of the compressor to be too high, and it is necessary to adjust the throttle valve opening accordingly to reduce the exhaust temperature of the compressor until T∈T1 is satisfied, and then execute step 17 to continue operation according to the current state.

[0196] Step 17: If the determination result is yes, the compressor can continue to operate according to the current state, and then execute step 18. In this way, the exhaust temperature of the compressor is controlled not to be too high, so as to ensure that the compressor operates in a better state.

[0197] Step 18, then proceed to determine whether D is equal to Q (Q is generally preferably 10% to 20%, this range is generally close to the environmental conditions set by the user, and only part of the refrigerant needs to be used to operate, so that the operating conditions gradually approach the set environmental conditions, which can avoid frequent start and stop of the prototype and reduce power consumption): If not, return to step 17 to continue operating according to the current state; if so, execute step 19 to continue adjusting the optimal refrigerant component ratio.

[0198] Step 19, further open the stop valve F2 and the stop valve F21 to allow the second liquid reservoir C2 to store part of the refrigerant, that is, open the stop valve F2 and the stop valve F21 to allow part of the refrigerant in the refrigerant circulation system to enter the second liquid reservoir C2, run for t0min (the longer t0 is, the more refrigerant enters the second liquid reservoir C2, t0 is preferably 3min to 6min), then close the stop valve F2 and the stop valve F21, enter the refrigerant component adjustment system, that is, enter the refrigerant composition adjustment mode, adjust the optimal refrigerant component ratio, and then execute step 20. In the refrigerant composition adjustment mode, the specific operations are all centered around the optimal refrigerant component ratio i (that is, the ratio that gives full play to the best performance of the refrigerant). For details, please refer to Figure 10 Example shown.

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

[0200] Step 34: Open the stop valve F2 and the stop valve F21 to allow part of the refrigerant in the refrigerant circulation system to enter the second liquid storage tank C2. After running for t0min, close the stop valve F2 and the stop valve F21, detect the refrigerant amount u in the upper layer and the refrigerant amount v in the lower layer of the second liquid storage tank C2, and then execute step 35.

[0201] When entering the refrigerant composition adjustment system in step 18, the refrigerant condenses and stratifies. The upper refrigerant volume u and the lower refrigerant volume v are collected through the upper and lower ports, respectively, and then delivered to the system. Specifically, the liquid refrigerant in the second liquid reservoir C2 is stratified, with the upper refrigerant volume u and the lower refrigerant volume v in the second liquid reservoir C2 being stratified.

[0202] Step 35 then determines whether u / v = i (i represents the optimal refrigerant mixing ratio, which varies for different refrigerants and can be set within a range of values depending on the actual situation). If so, the refrigerant composition adjustment system can be exited because the optimal ratio has been achieved and no further adjustment is required. If not, step 36 is executed to determine whether u / v is greater than i.

[0203] Step 36: Determine whether u / v>i is satisfied. If so, it indicates that the storage capacity of u is too large, and it is necessary to open the stop valve F21 to release some of the upper layer refrigerant into the system until u / v=i. Only then close the stop valve F21 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required. Similarly, if not, open the stop valve F22 to release some of the lower layer refrigerant into the system until u / v=i. Only then close the stop valve F22 and exit the refrigerant composition adjustment system. Because the optimal ratio has been reached at this point, no further adjustment is required.

[0204] Step 20: Enter the refrigerant composition adjustment system in step 19, adjust the refrigerant composition, exit the refrigerant composition adjustment system, and then proceed to determine whether T∈T1 is satisfied. If so, execute step 22; otherwise, execute step 21. T represents the exhaust temperature of the compressor in the system, and T1 represents the optimal exhaust temperature for the system (different systems and different refrigerants have different optimal values; for example, for R410A, the value is generally 80°C to 100°C).

[0205] Step 21, determine whether T∈T1 is satisfied: If the judgment is no, it means that the refrigerant circulation volume is small, causing the exhaust temperature of the compressor to be too high. It is necessary to adjust the throttle valve opening accordingly to reduce the exhaust temperature of the compressor until T∈T1 is satisfied, and then execute step 22 to continue operation according to the current state.

[0206] Step 22: If the determination is yes, the compressor can continue to operate in its current state. This ensures that the compressor operates in an optimal state by controlling the compressor's exhaust temperature to a level below which it will not be too high. In the present invention, multiple determinations are made to determine whether T∈T1 is satisfied. The goal is to control the compressor's exhaust temperature to a level below which it will not be too high, ensuring that the compressor operates in an optimal state.

[0207] In the solution of the present invention, see Figure 8 、 Figure 9 and Figure 10 In the example shown, the refrigerant composition regulating device is controlled according to the actual environmental conditions of the air-conditioning equipment and the actual exhaust temperature of the compressor, or the refrigerant composition regulating device and the throttling device are controlled to further regulate the refrigerant circulation composition and / or refrigerant circulation volume of the refrigerant circulation system, thereby solving the problem of composition change of the mixed refrigerant during operation, that is, solving the problem of excessive deviation between the composition of the mixed refrigerant in actual operation and the ideal state, and enabling the mixed refrigerant to maintain its original composition unchanged during operation, thereby improving the effect of the mixed refrigerant.

[0208] In some embodiments, the control unit 104 controls the throttling device according to the actual exhaust 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 a set exhaust temperature range. The specific functions and processing of the control unit 104 are also shown in step S610.

[0210] The control unit 104 is further configured to control the refrigerant circulation system to maintain current operation if it is determined that 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 also shown in step S620.

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

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

[0213] The control unit 104 is further configured to control the refrigerant circulation system to maintain current operation if it is determined that the actual exhaust temperature of the compressor after adjustment is within the set exhaust temperature range. The specific functions and processing of the control unit 104 are also shown in step S650.

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

[0215] Specifically, after controlling the first liquid storage device to preliminarily adjust the refrigerant circulation component of the refrigerant circulation system, the control unit 104 controls the throttling device according to the actual exhaust temperature of the compressor to preliminarily adjust the refrigerant circulation amount of the refrigerant circulation system, specifically including:

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

[0217] The control unit 104 controls the throttling device to further adjust the refrigerant circulation amount of the refrigerant circulation system according to the actual exhaust temperature of the compressor after controlling the second liquid storage device to further adjust the refrigerant circulation component 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 component of the refrigerant circulation system, determine for a second time whether the actual exhaust temperature of the compressor is within the set exhaust temperature range; the control unit 104 is further configured to, if the second determination that the actual exhaust temperature of the compressor is within the set exhaust temperature range is made, control the refrigerant circulation system to maintain current operation; the control unit 104 is further configured to, if the second determination that the actual exhaust temperature of the compressor is not within the set exhaust temperature range, control the throttling device to adjust the actual exhaust temperature of the compressor. The control unit 104 is further configured to determine whether the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range; the control unit 104 is further configured to, if the determination that the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range is made, control the refrigerant circulation system to maintain current operation; the control unit 104 is further configured to, if the determination that the adjusted actual exhaust temperature of the compressor is not within the set exhaust temperature range, return to continue controlling the throttling device to continue adjusting the actual exhaust temperature of the compressor until the adjusted actual exhaust temperature of the compressor is within the set exhaust temperature range.

[0219] It should be noted that the above embodiment only uses two additional liquid reservoirs as an example. In actual use, the number of liquid reservoirs is not limited to two, and can be three, four or more; the more liquid reservoirs there are, the more refrigerant can be stored, and the more stages the environmental conditions can be divided into in terms of how close they are to the user settings. For example, if there are three liquid reservoirs, they can be divided into three levels, such as 60% for the first level, 30% for the second level, and 10% for the third level. The finer the stages, the better the user experience. Of course, it is also possible to set up one liquid reservoir, but the comfort is not high; setting up two or more liquid reservoirs can further refine the proportion of the operating environmental conditions to the environmental conditions set by the user, providing a better experience.

[0220] The solution of the present invention proposes a control system (such as an air conditioning refrigeration system) for air conditioning equipment with multiple liquid reservoirs (such as more than two liquid reservoirs) and its control scheme, which has a simple structure and can adjust the refrigerant circulation volume and the operating components of the mixed refrigerant, reducing the refrigerant circulation volume to achieve the optimal state; thereby, 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 of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to 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 the control device of the air conditioning device is further provided. The air conditioning device may include: the control device of the air conditioning device described above.

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

[0224] In the solution of the present invention, the control logic described above is generally applicable to various air conditioning applications, including but not limited to dehumidifiers, mobile dehumidifiers, and split wall-mounted units. Specifically, the control systems of air conditioning equipment with compressors (such as air conditioning and refrigeration systems) can be adjusted based on the specific system configuration. The solution of the present invention is applicable to both fixed-frequency and variable-frequency air conditioners, but is more effective for fixed-frequency air conditioners.

[0225] Since the processing and functions implemented by the air conditioning equipment of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for any details not fully described in this embodiment, please refer to 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 the control method of an air conditioning device is also provided, including a computer program. When the computer program is executed by a processor, the steps of the control method of the air conditioning device described above are implemented.

[0227] Since the processing and functions implemented by the product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to 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 air conditioning equipment is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the control method for air conditioning equipment described above.

[0229] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0230] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0231] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A method for controlling 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 storage device, and the air conditioning equipment further has a refrigerant composition regulating device; the refrigerant composition regulating device is connected in parallel with the normally open liquid storage device and is used to regulate the refrigerant circulation amount of the refrigerant circulation system; The control method of the air conditioning equipment comprises: When the air conditioning equipment is started and running, obtaining the actual environmental working conditions of the air conditioning equipment; and obtaining the actual exhaust temperature of the compressor; According to 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 / or refrigerant circulation amount of the refrigerant circulation system.

2. The control method of air conditioning equipment according to claim 1, characterized in that: The refrigerant composition regulating device has an adjustable liquid storage device, and the number of the adjustable liquid storage devices is more than one; In the refrigerant circulation system, the exhaust port of the compressor returns to the intake 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; in, 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, as well as the operating time of at least one of the adjustable liquid storage devices after being opened, and executing a pre-set refrigerant composition regulating mode to regulate the refrigerant circulating composition of the refrigerant circulation system; Controlling the throttling device comprises: The opening of the throttling device is controlled to adjust the refrigerant circulation amount of the refrigerant circulation system.

3. The control method of air conditioning equipment according to claim 2, characterized in that: Each of the at least one adjustable liquid storage device comprises: 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 arranged on the input pipeline of the liquid storage body, the first output valve is arranged on the first output pipeline of the liquid storage body, and the second output valve is arranged 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 being opened, and executing a preset refrigerant composition regulating mode to regulate the refrigerant circulating composition of the refrigerant circulation system, including: For at least one of the adjustable liquid storage devices in the refrigerant composition regulating device, determining one of the adjustable liquid storage devices that currently needs to be controlled; Controlling the input valve of the one adjustable liquid storage device to open, and controlling the first output valve of the one adjustable liquid storage device to open, so as to control the one adjustable liquid storage device to open; After running the adjustable liquid storage device for a first set period of time, the input valve of the adjustable liquid storage device is controlled to close, and the first output valve of the adjustable liquid storage device is controlled to close, so as to control the adjustable liquid storage device to close and enter a pre-set refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system.

4. The control method of air conditioning equipment according to claim 3, characterized in that: In each of the adjustable liquid storage devices, the interior of the liquid reservoir body is divided into a first portion and a second portion; Entering a preset refrigerant composition adjustment mode to adjust the refrigerant circulation composition of the refrigerant circulation system includes: For one of the adjustable liquid storage devices currently to be controlled, determining the amount of refrigerant in the first portion of the liquid storage body, i.e., the amount of refrigerant in the first portion of the liquid storage body, and the amount of refrigerant in the second portion of the liquid storage body, i.e., the amount of refrigerant in the second portion of the liquid storage body; Determining the ratio of the first portion of the refrigerant volume of the liquid storage body to the second portion of the refrigerant volume of the liquid storage body in the adjustable liquid storage device as the refrigerant mixing ratio of the adjustable liquid storage device; Determining a relationship between a refrigerant mixing ratio of the adjustable liquid storage device and a set ratio; If it is determined that the refrigerant mixing ratio of the one adjustable liquid storage device is equal to the set ratio, then exiting the pre-set 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 the one adjustable liquid storage device is greater than the set ratio, the first output valve of the liquid storage body in the one adjustable liquid storage device is controlled to open 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, the first output valve of the liquid storage body in the one adjustable liquid storage device is controlled to close, exiting the pre-set refrigerant composition adjustment mode, so as to stop adjusting the refrigerant circulation composition of the refrigerant circulation system; If it is determined that the refrigerant mixing ratio of the adjustable liquid storage device is less than the set ratio, the second output valve of the liquid storage body in the adjustable liquid storage device is controlled to open to adjust the refrigerant circulation component 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 controlled to close, exit the pre-set refrigerant composition adjustment mode, and stop adjusting the refrigerant circulation component of the refrigerant circulation system.

5. The control method for air conditioning equipment according to claim 3 or 4, characterized in that: In each of the adjustable liquid storage devices, the liquid reservoir body has a top inlet and a top outlet, as well as a bottom outlet; wherein, when the liquid reservoir body is placed vertically, the input pipeline of the liquid reservoir body is connected to the top inlet of the liquid reservoir body, the first output pipeline of the liquid reservoir body is connected to the top outlet of the liquid reservoir body, and the second output pipeline of the liquid reservoir body is connected to the bottom outlet of the liquid reservoir body.

6. The control method for air conditioning equipment according to any one of claims 1 to 5, characterized in that: In the case where the refrigerant composition regulating device includes more than one of the adjustable liquid storage devices, the more than one of the adjustable liquid storage devices includes a first liquid storage device; According to 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 regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system, including: determining an environmental operating condition adjustment degree of the air conditioning equipment according to the actual environmental operating condition of the air conditioning equipment, which is recorded as a first adjustment degree of the air conditioning equipment; determining whether a first adjustment degree of the air conditioning device is equal to a first set degree; If it is determined that the first adjustment degree of the air conditioning device is not equal to the first set degree, controlling the refrigerant circulation system to maintain the current operation; If it is determined that the first adjustment degree of the air conditioning device is equal to the first set degree, controlling the refrigerant composition adjustment device, that is, controlling the first liquid storage device, to preliminarily 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 preliminarily adjust the refrigerant circulation amount of the refrigerant circulation system.

7. The control method of air conditioning equipment according to claim 6, characterized in that: According to 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 regulate the refrigerant circulation composition and / or refrigerant circulation amount of the refrigerant circulation system, further comprising: After controlling the first liquid storage device to preliminarily adjust the refrigerant circulation composition of the refrigerant circulation system and controlling the throttling device to preliminarily adjust the refrigerant circulation volume of the refrigerant circulation system, determining an environmental operating condition adjustment degree of the air conditioning equipment according to the actual environmental operating condition of the air conditioning equipment, recorded as a second adjustment degree of the air conditioning equipment; determining whether the environmental operating condition adjustment degree of the air conditioning equipment is equal to a second set degree, the second set degree being greater than the first set degree; If it is determined that the environmental operating condition adjustment degree of the air-conditioning equipment is not equal to the second set degree, controlling the refrigerant circulation system to maintain the current operation; If it is determined that the degree of adjustment of the environmental condition of the air-conditioning equipment is equal to the second set degree, controlling the refrigerant composition adjustment device, that is, 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 amount of the refrigerant circulation system.

8. The control method for air conditioning equipment according to claim 6 or 7, characterized in that: Controlling the throttling device according to the actual exhaust temperature of the compressor includes: determining whether the actual exhaust temperature of the compressor is within a set exhaust temperature range; If it is determined that the actual exhaust temperature of the compressor is within the set exhaust temperature range, controlling the refrigerant circulation system to maintain the current operation; If it is determined that the actual exhaust temperature of the compressor is not within the set exhaust temperature range, controlling the throttling device to adjust the actual exhaust temperature of the compressor; determining whether the actual exhaust temperature of the compressor after adjustment is within a set exhaust temperature range; If it is determined that the actual exhaust temperature of the compressor after adjustment is within the set exhaust temperature range, controlling the refrigerant circulation system to maintain the current operation; If it is determined that the actual exhaust temperature of the compressor after adjustment is not within the set exhaust temperature range, the control returns to continue controlling the throttling device to continue adjusting the actual exhaust temperature of the compressor until the actual exhaust temperature of the compressor after adjustment is within the set exhaust temperature range.

9. A control device for air conditioning equipment, 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 storage device, and the air conditioning equipment further has a refrigerant composition regulating device; the refrigerant composition regulating device is connected in parallel with the normally open liquid storage device and is used to regulate the refrigerant circulation amount of the refrigerant circulation system; The control device of the air conditioning equipment comprises: an acquisition unit configured to acquire the actual environmental working conditions of the air-conditioning device when the air-conditioning device is started 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 control the refrigerant composition regulating device and the throttling device according to 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 amount of the refrigerant circulation system.

10. An air conditioning device, characterized in that: include: The control device for air conditioning equipment according to claim 9.

11. The air conditioning equipment according to claim 10, characterized in that: The air conditioning equipment includes: an air conditioner or a dehumidifier.

12. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the control method for the air conditioning device according to any one of claims 1 to 8.

13. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method for controlling an air conditioning device according to any one of claims 1 to 8 are implemented.

Images