Single-system double-compressor air conditioner and continuous refrigeration operation control method and system thereof

Abstract

The invention discloses a single-system double-compressor air conditioner and a continuous refrigeration operation control method and system.The method comprises the steps that in a single-compressor refrigeration operation mode, whether double-compressor operation is carried out or not is determined when compressor current is larger than or equal to machine adding current I, and if yes, the single-system double-compressor air conditioner is started; if so, adding to the double compressors for operation through a synchronous machine adding mode based on standby equipment or a successive machine adding mode based on pressure analysis, otherwise, keeping the single compressor for operation; in the double-compressor refrigeration operation mode, when the double compressors operate in a deloading mode, if the unit load is larger than the unit rated load T, the operation is reduced to single-compressor operation, if the unit load is smaller than or equal to T, whether the operation is reduced to single-compressor operation or not is determined, if yes, the operation is reduced to single-compressor operation, and if not, the double compressors operate in a loading mode. The problem that in the operation process of a single-system double-compressor, due to water temperature fluctuation, a unit does not have refrigeration or is low in refrigeration capacity can be effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and relates to a single-system dual-compressor air conditioner and its continuous refrigeration operation control method, system, and readable storage medium. Background Art

[0002] In current commercial air conditioning systems, the control of using a single-system dual-compressor is relatively common, that is, two compressors share one system. Therefore, the startup and operation of the compressors will cause changes in the system environment, thus bringing a lot of uncertainties and instabilities to the operation of the air conditioning system.

[0003] For example, for a single-system series magnetic levitation model, it is necessary to rely on a bearing controller to control the levitation operation of the magnetic levitation unit. Generally, one compressor corresponds to one bearing controller. A large pressure difference will be generated during the startup process of the bearing controller and the compressor, which will directly affect the operation environment of the air conditioning system. When the system operation environment suddenly changes, it will cause the compressor startup to fail and the bearing controller to malfunction, thus affecting the operation of the entire air conditioning system.

[0004] Therefore, for the compressor addition method of this unit, when the addition condition is met, the running compressor goes into standby shutdown, and the unstarted compressor enters the standby state. When both compressors are in the standby state, after an interval of T seconds, the two compressors start simultaneously, specifically as Figure 1 shown.

[0005] This addition startup method will cause the air conditioning unit to be unable to meet the customer's demand for continuous refrigeration. In addition, in autumn and winter, if some users need continuous refrigeration, due to weather problems, the water temperature will be relatively low, and the air conditioning unit will experience unit reduction and standby situations. Summary of the Invention

[0006] To solve the deficiencies in the prior art, the present invention provides a single-system dual-compressor air conditioner and its continuous refrigeration operation control method, system, and readable storage medium.

[0007] The present invention adopts the following technical solutions.

[0008] In a first aspect of the present invention, a continuous refrigeration operation control method for a single-system dual-compressor air conditioner is proposed, including:

[0009] In the single-compressor refrigeration operation mode, when the compressor current ≥ I, it is confirmed whether to add to the dual-compressor operation. If so, it is added to the dual-compressor operation through a synchronous addition method based on standby equipment or a sequential addition method based on pressure analysis; otherwise, the single-compressor operation is maintained, where I is the addition current.

[0010] In the refrigeration operation mode of the dual-compression mechanism, when the dual compressors operate with load reduction, if the unit load > T, it reduces to single-compressor operation; if the unit load ≤ T, it is confirmed whether to reduce to single-compressor operation. If so, it reduces to single-compressor operation; otherwise, the dual compressors operate with load increase, where T is the rated load of the unit.

[0011] Preferably, the confirmation method for whether to increase to dual-compressor operation is as follows:

[0012] An alarm of too high compressor current is sent through the touch screen and it is confirmed whether to increase the load to increase to dual-compressor operation. If the user does not confirm after the set time for the alarm to be sent, it is defaulted to increase to dual-compressor operation.

[0013] Preferably, the synchronous compressor addition method based on the standby equipment is specifically as follows:

[0014] The standby equipment is started and the currently operating compressor is shut down. After the compressor addition interval time Ts, the dual compressors are started synchronously. After the dual compressors enter capacity regulation, the standby equipment is shut down.

[0015] Preferably, the sequential compressor addition method based on pressure analysis is specifically as follows:

[0016] The currently operating compressor maintains the guide vane opening, and the frequency is reduced at a rate of k. It is continuously judged whether the system pressure difference is greater than the pressure difference threshold △P: If so, the other compressor is started and the guide vane opening and frequency of this compressor are increased by increments of A and F respectively; if not, the other compressor is started and the guide vane opening and frequency of this compressor are increased by increments of A / 2 and F / 2 respectively; until the dual compressors enter normal capacity regulation and operate with load increase;

[0017] where k is the frequency adjustment value of the currently operating compressor, and A and F are the adjustment values of the guide vane opening and frequency of the other compressor.

[0018] Preferably, the system pressure difference is the difference between the current system pressure and the system pressure in the previous sampling period.

[0019] Preferably, the confirmation method for whether to reduce to single-compressor operation is as follows:

[0020] An alarm of too low unit load is sent through the touch screen and it is confirmed whether to execute compressor reduction. If no confirmation information is received after the set time for the alarm to be sent, it is defaulted to execute compressor reduction.

[0021] Preferably, the implementation method for the dual compressors to operate with load increase is as follows:

[0022] By adjusting the opening of the water flow valve, the cooling water outlet temperature on the condenser side is increased, so that the dual compressors operate with load increase until the unit load > T.

[0023] Preferably, it further includes: prompting the specific refrigeration operation mode through the operation indicator light on the air conditioner electric control box or the display light on the touch screen.

[0024] The second aspect of the present invention proposes a continuous refrigeration operation control system for a single-system dual-compressor air conditioner, including:

[0025] A single-machine mode control module, used in the refrigeration operation mode of a single compressor, to confirm whether to add to dual-compressor operation when the compressor current ≥ I. If so, add to dual-compressor operation through a synchronous machine addition method based on standby equipment or a sequential machine addition method based on pressure analysis. Otherwise, maintain single-compressor operation;

[0026] A dual-machine mode control module, used in the refrigeration operation mode of dual compressors. When the dual compressors are in unloading operation, if the unit load > T, reduce to single-compressor operation. If the unit load ≤ T, confirm whether to reduce to single-compressor operation. If so, reduce to single-compressor operation. Otherwise, perform dual-compressor loading operation.

[0027] The third aspect of the present invention proposes a single-system dual-compressor air conditioner, and the air conditioner includes the above-mentioned control system.

[0028] The fourth aspect of the present invention proposes a readable storage medium, on which a program is stored, and when the program is executed by a processor, the above-mentioned control method is implemented.

[0029] Compared with the prior art, the beneficial effects of the present invention at least include:

[0030] In the present invention, for different refrigeration operation modes, by judging the magnitudes of the compressor current and the unit load, and confirming with the user whether to add or subtract machines, continuous refrigeration operation of a single-system dual-compressor is achieved, effectively solving problems such as the unit being in a state of no refrigeration or low refrigeration capacity due to water temperature fluctuations during the operation of a single-system dual-compressor air conditioner system.

[0031] The present invention also provides two optional improved machine addition methods, namely synchronous machine addition based on standby equipment and sequential machine addition based on pressure analysis. Among them, the synchronous machine addition method based on standby equipment maintains continuous refrigeration through standby equipment, avoiding the situation where the two compressors do not refrigerate for a period of time (Ts) during synchronous machine addition; the sequential machine addition method based on pressure analysis analyzes and judges the system pressure situation, and differentially adjusts the guide vane opening of the second compressor according to whether the pressure difference exceeds the threshold to achieve load balance adjustment, making the operation of the unit optimal and avoiding problems such as the unit reporting bearing protection and the unit malfunctioning and shutting down when directly starting the second compressor.

[0032] The present invention can bring the unit load and unit energy efficiency of the air conditioning system to a relatively high level, greatly improving the reliability of the air conditioning system, ensuring the stable operation of the entire air conditioning system on the premise of safety, and enhancing the comfort of users and the stable operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is the existing compressor adding machine scheme;

[0034] Figure 2 is the flow chart of the continuous refrigeration operation control method for the single-system dual-compressor air conditioner of the present invention;

[0035] Figure 3 is the control flow chart for adding machine and continuous refrigeration operation in the single-compressor refrigeration operation mode of the present invention;

[0036] Figure 4 is the control flow chart for reducing machine and continuous refrigeration operation in the dual-compressor refrigeration operation mode of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the spirit of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1 of the present invention provides a continuous refrigeration operation control method for a single-system dual-compressor air conditioner, as Figure 2 shown, including:

[0039] In the single-compressor refrigeration operation mode, when the compressor current ≥ the adding machine current I, it is confirmed whether to add to the dual-compressor operation. If so, it is added to the dual-compressor operation through the synchronous adding machine method based on standby equipment or the sequential adding machine method based on pressure analysis; otherwise, the single-compressor operation is maintained.

[0040] Further preferably, the adding machine current I is a parameter that can be set.

[0041] The confirmation method for whether to add to the dual-compressor operation is: sending an alarm of too high compressor current through the touch screen and confirming whether to increase the load, where increasing the load corresponds to adding to the dual-compressor operation.

[0042] The synchronous adding machine method or the sequential adding machine method can be manually selected through the touch screen.

[0043] The specific process of the synchronous adding machine method based on standby equipment is as follows:

[0044] Turn on the standby device and turn off the currently running compressor. After the machine addition interval time Ts, the two compressors are turned on and run synchronously. After the two compressors enter capacity regulation, turn off the standby device. Specifically, in implementation, the standby device can be a third compressor or a refrigeration device such as a cold storage tank, as long as it can meet the continuous refrigeration demand. The range of the machine addition interval time Ts can be from 0 to 600 s.

[0045] The specific method of adding machines based on pressure analysis is as follows:

[0046] The currently running compressor maintains the guide vane opening, and the frequency is unloaded at a rate of k, and it is judged whether the system pressure difference is greater than the pressure difference threshold △P: If so, another compressor is started and this compressor increases the guide vane opening and frequency respectively according to the adjustment value A of the guide vane and the increment of the frequency adjustment value F; If not, another compressor is started and this compressor increases the guide vane opening and frequency respectively according to the increments of A / 2 and F / 2; until the two compressors enter normal loading operation in capacity regulation, that is, during the startup process of the compressor, the frequency and the guide vane will be adjusted continuously. The adjustment amplitude of this process is not affected by some factors of the water temperature. When reaching a certain value, for example, after the guide vane is opened to 30%, it can be regarded as entering capacity regulation. After the unit enters capacity regulation, it will perform PID

[0047] (Proportional-Integral-Derivative) regulation, and the adjustment amplitude is determined according to the PID calculation value.

[0048] Among them, the adjustment values k and F of the frequency and the adjustment value A of the guide vane are determined according to the magnitude of the calculation value of the unit capacity PID, and generally can be 0, 1, 2, 3.

[0049] The pressure difference threshold △P is specifically the pressure difference threshold of the condenser pressure, evaporator pressure, etc. of the unit.

[0050] To sum up, as Figure 3 shown, when only one compressor of the current air conditioner unit is running, it is judged whether the compressor current is ≥I. When the current <I, at this time only compressor one of the unit is running;

[0051] When the compressor current ≥I, the unit issues an alarm prompt on the touch screen: Whether to increase the load. At this time, the user can manually intervene and can increase the load by confirming whether machine addition is required. After the alarm is issued for a period of time, if the user does not click the touch screen to confirm, it is defaulted to add a machine; the compressor current and the alarm can be displayed on the touch screen, and the operation of the compressor can be reflected by the operation indicator light on the electric control box or the display light on the touch screen; when there is no need to increase the load, at this time only compressor one is running and compressor two is in the standby state;

[0052] When it is necessary to increase the unit load (add a unit), there are two ways to add a unit:

[0053] (1) Considering that the pressure value will fluctuate during the operation of the unit, when adding units successively, it is necessary to judge in real time whether the system pressure difference is greater than the pressure difference threshold △P, and then adjust the load balance according to the judgment result to make the operation of the unit optimal. Specifically: Compressor 1 maintains the guide vane opening, and the frequency is unloaded at a rate of k. During this process, judge the system pressure difference:

[0054] When the pressure difference (the pressure difference between the current system pressure and the pressure in the previous sampling period) ≤ △P, Compressor 2 is started, and the guide vane and frequency are increased according to the increments of A and F until Compressor 1 and Compressor 2 enter the normal loading operation of capacity adjustment; the system pressure can be the pressure of the condenser, evaporator, etc. of the system collected by the sensor. When a sampling period arrives, record the pressure value at this time as P1. When the next sampling period arrives, record the pressure value of the next period as P2. P2 - P1 is the pressure difference;

[0055] When the pressure difference (the pressure difference between the current system pressure and the pressure in the previous sampling period) > △P, Compressor 2 is started, and the guide vane and frequency are increased according to the increments of A / 2 and F / 2 until Compressor 1 and Compressor 2 enter the normal loading operation of capacity adjustment.

[0056] (2) When synchronous unit addition is selected, the standby equipment is started first. At this time, Compressor 1 will shut down first for Ts. After Ts, Compressor 1 and Compressor 2 start running synchronously. After Compressor 1 and Compressor 2 enter capacity adjustment during operation, the standby equipment is then shut down.

[0057] When the two compressors unload, the load will decrease, but it cannot be guaranteed that the load during the operation of the two compressors is > the rated load T of the unit. Therefore, when the two compressors operate in a load reduction mode, there are two cases: the unit load > T and the unit load ≤ T. Thus, in the refrigeration operation mode of the two compressors, when the two compressors operate in a load reduction mode, if the unit load > T, it is reduced to single-compressor operation. If the unit load ≤ T, it is confirmed whether it is reduced to single-compressor operation. If so, it is reduced to single-compressor operation. Otherwise, the two compressors operate in a load increase mode.

[0058] Further preferably, the range of the rated load T of the unit can be 15 - 100%, and it can be determined whether to unload the unit according to the set value of this parameter; the unit load is for the unit, not for a single compressor.

[0059] The confirmation method for whether to reduce to single-compressor operation is: issue an alarm of too low unit load through the touch screen and confirm whether to execute load reduction.

[0060] The implementation method of dual-compressor loaded operation is as follows: By adjusting the opening degree of the water flow valve, the cooling water outlet temperature on the condenser side is increased, so that the dual-compressor loaded operation is achieved until the unit load > T.

[0061] To sum up, as Figure 4 shown, when the two compressors of the current unit are running simultaneously, during the operation of the unit, due to conditions such as water temperature, the compressor unloads. During the unloading process, when the unit is reduced from dual compressors to single compressor, that is, when the unit load ≤ T, at this time the unit issues an alarm of too low unit load, and the user manually intervenes to confirm whether to execute unit reduction to increase the load of the entire unit (including the running compressor); the unit load and alarm can be displayed on the touch screen.

[0062] After the alarm is issued, if it is confirmed to execute unit reduction, the compressor of the unit will perform a standby action. At this time, when compressor one stands by, compressor two runs normally.

[0063] If the unit is not reduced, it is necessary to adjust the opening degree of the water flow valve to increase the cooling water outlet temperature. At this time, the compressor cannot perform the unloading action, and compressor one and compressor two can work continuously.

[0064] Further preferably, when reducing from dual units to single unit, the compressor to be turned off is selected according to factors such as running time, start-stop times, and DIP switch values. For example, first select the one with a longer running time to turn off. If the running times of the dual units are the same, then select the one with fewer start-stop times to turn off. If the start-stop times of the dual units are also the same, then select according to the DIP switch value.

[0065] Further preferably, the method further includes: prompting the specific refrigeration operation mode through the operation indicator light on the air conditioner electric control box or the display light on the touch screen. Specifically, one compressor corresponds to one indicator light / display light. When running, the light is on, and when turned off, the light is off.

[0066] Embodiment 2 of the present invention provides a continuous refrigeration operation control system for a single-system dual-compressor air conditioner, including:

[0067] A single-unit mode control module, used for in the single-compressor refrigeration operation mode, when the compressor current ≥ I, confirm whether to add to dual-compressor operation. If so, add to dual-compressor operation through the synchronous unit addition method based on standby equipment or the sequential unit addition method based on pressure analysis, otherwise maintain single-compressor operation;

[0068] A dual-unit mode control module, used for in the dual-compressor refrigeration operation mode, when the dual compressors unload, if the unit load > T, then reduce to single-compressor operation. If the unit load ≤ T, confirm whether to reduce to single-compressor operation. If so, reduce to single-compressor operation, otherwise perform dual-compressor loaded operation.

[0069] Embodiment 3 of the present invention provides a single-system dual-compressor air conditioner, and the air conditioner includes the control system described above.

[0070] Embodiment 4 of the present invention provides a readable storage medium, on which a program is stored, and when the program is executed by a processor, the control method described above is implemented.

[0071] Compared with the prior art, the beneficial effects of the present invention at least include:

[0072] For different refrigeration operation modes, the present invention judges the magnitudes of the compressor current and the unit load, and confirms with the user whether to add or subtract machines, so as to realize the continuous refrigeration operation of the single-system dual-compressor. It can prevent the compressor from being unable to meet the customer's continuous refrigeration requirements due to problems such as water temperature, and effectively solve the problems that the single-system dual-compressor air-conditioning system is in a state of no refrigeration or low refrigeration capacity due to water temperature fluctuations during operation; and provides two optional improved machine-adding methods, namely synchronous machine-adding based on standby equipment and sequential machine-adding based on pressure analysis. Among them, the synchronous machine-adding method based on standby equipment maintains continuous refrigeration through standby equipment, avoiding the situation that the two compressors do not refrigerate for a period of time (Ts) during synchronous machine-adding; the sequential machine-adding method based on pressure analysis adjusts the load balance by analyzing and judging the system pressure situation, making the operation of the unit optimal, and avoiding the problem that the unit reports bearing protection and the unit fails to stop when the second compressor is directly started.

[0073] The present invention can make the unit load and unit energy efficiency of the air-conditioning system reach a relatively high state, greatly improve the reliability of the air-conditioning system, ensure the stable operation of the whole air-conditioning system on the premise of safety, and improve the comfort of users and the stable operation of the unit.

[0074] The present disclosure can be a system, a method, and / or a computer program product. The computer program product may include a computer-readable storage medium having thereon computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0075] A computer-readable storage medium can be a tangible device that can hold and store instructions for use by an instruction execution device. A computer-readable storage medium may be, for example—but not limited to—an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device such as a punched card or raised structures in grooves having instructions stored thereon, and any suitable combination of the foregoing. The computer-readable storage medium as used herein is not construed as being a transitory signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0076] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to respective computing / processing devices, or can be downloaded to an external computer or an external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network may include a copper transmission cable, an optical fiber transmission, a wireless transmission, a router, a firewall, a switch, a gateway computer, and / or an edge server. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0077] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider). In some embodiments, by using the state information of the computer-readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field-programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer-readable program instructions to implement various aspects of the present disclosure.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A continuous refrigeration operation control method for a single-system dual-compressor air conditioner, characterized in that, Including: In the single-compressor refrigeration operation mode, when the compressor current ≥ I, it is confirmed whether to add to the dual-compressor operation. If so, it is added to the dual-compressor operation through the synchronous unit addition method based on standby equipment or the sequential unit addition method based on pressure analysis. Otherwise, it remains in the single-compressor operation, where I is the unit addition current. In the dual-compressor refrigeration operation mode, when the dual compressors are in unloading operation, if the unit load > T, it is reduced to the single-compressor operation. If the unit load ≤ T, it is confirmed whether to reduce to the single-compressor operation. If so, it is reduced to the single-compressor operation. Otherwise, the dual compressors are in loading operation, where T is the rated load of the unit.

2. A continuous refrigeration operation control method for a single-system dual-compressor air conditioner according to claim 1, characterized in that: The confirmation method for whether to add to the dual-compressor operation is: An alarm of too high compressor current is sent through the touch screen and it is confirmed whether to increase the load to add to the dual-compressor operation. If the user does not confirm after the set time for the alarm to be sent, it is defaulted to add to the dual-compressor operation.

3. A continuous refrigeration operation control method for a single-system dual-compressor air conditioner according to claim 1, characterized in that: The synchronous unit addition method based on standby equipment is specifically as follows: The standby equipment is started and the currently operating compressor is shut down. After the unit addition interval time Ts, the dual compressors are started synchronously. After the dual compressors enter the capacity adjustment, the standby equipment is shut down.

4. A continuous refrigeration operation control method for a single-system dual-compressor air conditioner according to claim 1, characterized in that: The sequential unit addition method based on pressure analysis is specifically as follows: The currently operating compressor maintains the guide vane opening, and the frequency is unloaded at the k rate, and it is continuously judged whether the system pressure difference is greater than the pressure difference threshold △P: If so, the other compressor is started and the guide vane opening and frequency of this compressor are increased by the increments of A and F respectively; If not, the other compressor is started and the guide vane opening and frequency of this compressor are increased by the increments of A / 2 and F / 2 respectively; Until the dual compressors enter the normal loading operation in the capacity adjustment; Where k is the frequency adjustment value of the currently operating compressor, and A and F are the adjustment values of the guide vane opening and frequency of the other compressor.

5. A continuous refrigeration operation control method for a single-system dual-compressor air conditioner according to claim 1, characterized in that: The confirmation method for whether to reduce to the single-compressor operation is: An alarm of too low unit load is sent through the touch screen and it is confirmed whether to execute unit reduction. If no confirmation information is received after the set time for the alarm to be sent, it is defaulted to execute unit reduction.

6. A continuous refrigeration operation control method for a single-system dual-compressor air conditioner according to claim 1, characterized in that: The implementation method for the dual compressors to be in loading operation is: By adjusting the opening of the water flow valve, the cooling water outlet temperature on the condenser side is increased, so that the dual compressors are in loading operation until the unit load > T.

7. A continuous refrigeration operation control method for a single-system dual-compressor air conditioner according to claim 1, characterized in that: It also includes: prompting the specific refrigeration operation mode through the operation indicator light on the air conditioner electric control box or the display light on the touch screen.

8. A continuous refrigeration operation control system for a single-system dual-compressor air conditioner, which is used to operate the control method described in any one of claims 1-7, and is characterized in that, The control system includes: The single-machine mode control module is used to confirm whether to add to the dual-compressor operation when the compressor current ≥ I in the single-compressor refrigeration operation mode. If so, it adds to the dual-compressor operation through the synchronous machine addition method based on the standby equipment or the sequential machine addition method based on pressure analysis; otherwise, it maintains the single-compressor operation. The dual-machine mode control module is used in the dual-compressor refrigeration operation mode. When the dual compressors are operating at reduced load, if the unit load > T, it reduces to the single-compressor operation; if the unit load ≤ T, it confirms whether to reduce to the single-compressor operation. If so, it reduces to the single-compressor operation; otherwise, the dual compressors operate at increased load.

9. A single-system dual-compressor air conditioner, characterized in that, The air conditioner includes the control system described in claim 8.

10. A readable storage medium, on which a program is stored, characterized in that: When the program is executed by the processor, it implements the control method described in any one of claims 1 to 7.

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