A method, device and medium for controlling throttle valve opening

Abstract

The present invention relates to a control method, device and medium for the throttle valve opening, and belongs to the technical field of air conditioning. The control method for the throttle valve opening comprises: obtaining the current internal function energy demand; detecting the current outer ring temperature; and controlling the minimum valve opening of the throttle valve according to the current internal function energy demand and the current outer ring temperature. In the low-temperature refrigeration process of the air conditioner, the present invention selects different minimum throttle valve openings according to different energy demands of the internal unit and different ambient temperatures of the external unit, and avoids the risk of low-pressure frequency limiting by ensuring that the low pressure is within a reasonable range, thereby improving the reliability of the air-conditioning unit under low-temperature refrigeration operating conditions, with higher flexibility, stronger reliability, and more applicable working conditions.

Description

Technical Field

[0001] The invention relates to a method, a device and a medium for controlling the opening of a throttle valve, and belongs to the technical field of air conditioning. Background Art

[0002] With the development of today's society, air conditioners are more and more widely used in everyone's life scenes. Most air conditioners use the cooling function in the summer when the outdoor temperature is high. However, when there is a heat source in the relevant indoor environment, it is necessary to use the cooling mode in the outdoor temperature is lower.

[0003] For air conditioners that are adjusted based on exhaust superheat, due to the low temperature, the unit needs to operate on a platform after just starting up, resulting in insufficient exhaust superheat, causing the throttle valve to be closed, making the unit's low pressure low and entering a frequency-limited state. After the frequency is reduced, the unit's exhaust superheat is even lower, and further closing the throttle valve leads to a vicious cycle of even lower low pressure.

[0004] The existing conventional technology mainly ensures low pressure by fixing the valve opening of different platforms or by allowing the throttle valve to be opened but not closed when operating the compressor platform, until the exhaust superheat rises to a reasonable range and then conventional PI adjustment is performed.

[0005] Although existing conventional technologies are applicable under normal operating conditions, under extreme conditions of low-temperature refrigeration, there is still a risk of low-pressure frequency limiting when only relying on the external unit ambient temperature and exhaust superheat to ensure low pressure.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a throttle valve opening control method, device and medium to solve the technical problem in the related art that there is a risk of low pressure frequency limitation under extreme conditions of low temperature refrigeration.

[0008] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0009] In one aspect, the present invention provides a method for controlling a throttle valve opening, comprising:

[0010] Get the current internal function requirements;

[0011] Detect the current outer ring temperature;

[0012] The minimum valve opening of the throttle valve is controlled according to the current internal function demand and the current outer ring temperature.

[0013] Furthermore, the obtaining of the current internal function needs to include:

[0014] Detect the current internal unit temperature;

[0015] Calculate the difference between the current indoor unit temperature and the set temperature to obtain the current indoor unit energy requirement.

[0016] Furthermore, it also includes:

[0017] When the internal energy required is greater than 80%, the current external ring temperature is detected;

[0018] If the current outer ring temperature is ≤10℃, the minimum valve opening of the throttle valve is controlled to be α;

[0019] If 10℃<current outer ring temperature<20℃, the minimum valve opening of the throttle valve is controlled to be α-b;

[0020] If the current outer ring temperature is ≥20℃, the minimum valve opening of the throttle valve is controlled to be α-Kb.

[0021] Furthermore, it also includes:

[0022] When 20%≤the acquired internal energy requirement≤80%, detect the current external ring temperature;

[0023] If the current outer ring temperature is ≤10℃, the minimum valve opening of the throttle valve is controlled to be α-a;

[0024] If 10℃<current outer ring temperature<20℃, the minimum valve opening of the throttle valve is controlled to be α-ba;

[0025] If the current outer ring temperature is ≥20℃, the minimum valve opening of the throttle valve is controlled to be α-Kb-a.

[0026] Furthermore, it also includes:

[0027] When the internal energy required is less than 20%, the current external ring temperature is detected;

[0028] If the current outer ring temperature is ≤10℃, the minimum valve opening of the throttle valve is controlled to be α-ξa;

[0029] If 10℃<current outer ring temperature<20℃, the minimum valve opening of the throttle valve is controlled to be α-b-ξb;

[0030] If the current outer ring temperature is ≥20℃, the minimum valve opening of the throttle valve is controlled to be α-Kb-ξb.

[0031] Furthermore, the value range of α is (25% to 35%)×maximum valve opening;

[0032] The values ​​of a and b are 10 or 20;

[0033] The values ​​of ξ and K are 2, 3 or 4.

[0034] In another aspect, the present invention provides a throttle valve opening control device, comprising a processor and a storage medium;

[0035] The storage medium is used to store instructions;

[0036] The processor is used to operate according to the instructions to execute the steps of the above method.

[0037] In another aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when the program is executed by a processor.

[0038] Compared with the prior art, the beneficial effects achieved by the embodiments of the present invention include:

[0039] During the low-temperature refrigeration process of the air conditioner, the present invention selects different minimum throttle valve openings according to different energy requirements of the indoor unit and different ambient temperatures of the outdoor unit, and avoids the risk of low-pressure frequency limiting by ensuring that the low pressure is within a reasonable range, thereby improving the reliability of the air-conditioning unit under low-temperature refrigeration operating conditions, with higher flexibility, stronger reliability, and more applicable conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a logic diagram of the throttle valve opening control method provided by the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0042] Embodiment 1:

[0043] like Figure 1 As shown, this embodiment provides a method for controlling the throttle valve opening, including:

[0044] Get the current internal function requirements;

[0045] Detect the current outer ring temperature;

[0046] The minimum valve opening of the throttle valve is controlled according to the current internal function demand and the current outer ring temperature.

[0047] Specifically, the obtaining of the current internal function needs to include:

[0048] Detect the current internal unit temperature;

[0049] Calculate the difference between the current indoor unit temperature and the set temperature to obtain the current indoor unit energy requirement.

[0050] In this embodiment, when the energy demand is low, because the compressor frequency does not need to run at the highest frequency, the exhaust superheat has little effect on the performance of the air-conditioning unit. At this time, the reliability of the air-conditioning unit should be given priority to ensure that the low pressure can be within a reasonable operating range. Therefore, the minimum valve opening of different throttle valves is set. The lower the energy demand, the smaller the minimum valve opening of the throttle valve.

[0051] When the energy demand is the same and the ambient temperature is different, the lower the temperature is, the lower the low pressure is. Therefore, the lower the outer ring temperature is, the larger the minimum valve opening of the selected throttle valve is.

[0052] Specifically, the minimum valve opening of the throttle valve is:

[0053] When the internal energy required is greater than 80%, the current external ring temperature is detected;

[0054] If the current outer ring temperature is ≤10℃, the minimum valve opening of the throttle valve is controlled to be α;

[0055] If 10℃<current outer ring temperature<20℃, the minimum valve opening of the throttle valve is α-b

[0056] If the current outer ring temperature is ≥20℃, the minimum valve opening of the throttle valve is controlled to be α-Kb.

[0057] Further, when 20% ≤ the acquired internal function requirement ≤ 80%, the current outer ring temperature is detected;

[0058] If the current outer ring temperature is ≤10℃, the minimum valve opening of the throttle valve is controlled to be α-a;

[0059] If 10℃<current outer ring temperature<20℃, the minimum valve opening of the throttle valve is controlled to be α-ba;

[0060] If the current outer ring temperature is ≥20℃, the minimum valve opening of the throttle valve is controlled to be α-Kb-a.

[0061] Further, when the obtained internal energy requirement is less than 20%, the current external ring temperature is detected;

[0062] If the current outer ring temperature is ≤10℃, the minimum valve opening of the throttle valve is controlled to be α-ξa;

[0063] If 10℃<current outer ring temperature<20℃, the minimum valve opening of the throttle valve is controlled to be α-b-ξb;

[0064] If the current outer ring temperature is ≥20℃, the minimum valve opening of the throttle valve is controlled to be α-Kb-ξb.

[0065] In this embodiment, the value range of α is (25% to 35%)×maximum valve opening;

[0066] The values ​​of a and b are 10 or 20;

[0067] The values ​​of ξ and K are 2, 3 or 4.

[0068] Embodiment 2:

[0069] This embodiment provides a throttle valve opening control device, including a processor and a storage medium;

[0070] The storage medium is used to store instructions;

[0071] The processor is used to operate according to the instructions to execute the steps of the method according to the first embodiment.

[0072] Embodiment three:

[0073] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the method described in the first embodiment are implemented.

[0074] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0075] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0076] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0077] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for controlling the opening of a throttle valve, characterized in that: include: Get the current internal function demand; detect the current external ring temperature; Controlling the minimum valve opening of the throttle valve according to the current internal function demand and the current outer ring temperature; When the internal function demand obtained is greater than 80%, the current outer ring temperature is detected; if the current outer ring temperature is ≤10°C, the minimum valve opening of the throttle valve is controlled to be α; if 10°C<current outer ring temperature<20°C, the minimum valve opening of the throttle valve is controlled to be α-b; if the current outer ring temperature is ≥20°C, the minimum valve opening of the throttle valve is controlled to be α-Kb; When 20%≤the acquired internal function demand≤80%, detect the current outer ring temperature; if the current outer ring temperature≤10°C, control the minimum valve opening of the throttle valve to α-a; if 10°C<current outer ring temperature<20°C, control the minimum valve opening of the throttle valve to α-ba; if the current outer ring temperature≥20°C, control the minimum valve opening of the throttle valve to α-Kb-a; When the internal energy demand is less than 20%, the current outer ring temperature is detected; if the current outer ring temperature is ≤10°C, the minimum valve opening of the throttle valve is controlled to be α-ξa; if 10°C<current outer ring temperature<20°C, the minimum valve opening of the throttle valve is controlled to be α-b-ξb; if the current outer ring temperature is ≥20°C, the minimum valve opening of the throttle valve is controlled to be α-Kb-ξb; The value range of α is (25% to 35%)×maximum valve opening; the values ​​of a and b are 10 or 20; the values ​​of ξ and K are 2 or 3 or 4; The obtaining of the current internal function needs to include: detecting the current temperature of the internal unit; Calculate the difference between the current indoor unit temperature and the set temperature to obtain the current indoor unit energy requirement.

2. A throttle valve opening control device, characterized in that: It comprises a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the method according to claim 1.

3. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to claim 1 are implemented.

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