Control method and device for variable capacity compressor air conditioner, and variable capacity compressor air conditioner

Abstract

The application relates to the technical field of air conditioners, and discloses a control method for a variable displacement compressor air conditioner, wherein an exhaust port of a variable displacement compressor is connected to a variable displacement chamber of the variable displacement compressor through an exhaust pipeline, and an electric heating device is arranged on the exhaust pipeline; the control method comprises the following steps: in the case that the variable displacement compressor air conditioner executes a heating mode, obtaining an exhaust temperature of the variable displacement compressor, an exhaust pressure and a saturated steam temperature corresponding to the exhaust pressure; and in the case that the difference between the exhaust temperature and the saturated steam temperature is less than a first temperature, controlling the electric heating device to start. The method can avoid liquid accumulation in the variable displacement chamber and eliminate noise caused by liquid accumulation. The application further discloses a control device for the variable displacement compressor air conditioner, a variable displacement compressor air conditioner and a storage medium.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, for example to a control method and device for a variable capacity compressor air conditioner, a variable capacity compressor air conditioner and a storage medium. Background Technology

[0002] Currently, to accommodate multi-split air conditioning systems (one outdoor unit connecting multiple indoor units) where only one or several indoor units are running, the air conditioning system operates at low load, requiring small cooling capacity and high energy efficiency. Air conditioning compressors employ variable capacity technology to reduce the minimum output load. This achieves higher volumetric efficiency and motor efficiency with a smaller compressor capacity and relatively higher speed. However, after prolonged periods of inactivity in low-temperature winter environments, the outdoor unit components remain at low temperatures. When the compressor first starts, the entire air conditioning system establishes a slow pressure difference between intake and exhaust, and a relatively slow superheat. When the variable capacity compressor switches to dual-cylinder operation (variable capacity cylinder begins working), because the exhaust is a two-phase mixture of gas and liquid or saturated gas, a large amount of liquid accumulates inside the subcooled variable capacity tank and cavity. When there is significant liquid accumulation in the variable capacity cavity, the pressure pulsation at the tail of the variable capacity vane increases sharply, causing the vane to become unstable and impact within the vane slot, generating abnormal noise.

[0003] The related technology involves a variable capacity compressor, including a compressor body, a reversing valve and a heater. The first port of the reversing valve is connected to the first suction port of the compressor body through a pipeline, and the second port of the reversing valve is connected to the discharge port of the compressor body. The heater is disposed on the pipeline for heating the liquid refrigerant stored in the pipeline.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] The relevant technology only heats the cylinder in single-cylinder mode during startup and cannot solve the technical problem of impact noise caused by liquid accumulation.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a control method and apparatus for a variable capacity compressor air conditioner, a variable capacity compressor air conditioner, and a storage medium to eliminate impact noise problems caused by liquid slugging.

[0009] In some embodiments, the exhaust port of the variable displacement compressor is connected to the variable displacement chamber of the compressor via an exhaust pipe, and an electric heating device is provided on the exhaust pipe; the method includes:

[0010] When the variable capacity compressor air conditioner is in heating mode, obtain the discharge temperature, discharge pressure, and saturated steam temperature corresponding to the discharge pressure of the variable capacity compressor;

[0011] When the difference between the exhaust temperature and the saturated steam temperature is less than the first temperature, the electric heating device is activated.

[0012] In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to execute, when running the program instructions, the control method for a variable capacity compressor air conditioner as described above.

[0013] In some embodiments, the variable capacity compressor air conditioner includes:

[0014] The discharge port of the variable displacement compressor is connected to the variable displacement chamber of the compressor through an exhaust pipe;

[0015] An electric heating device, connected in series in the exhaust pipe, is used to heat the refrigerant discharged from the variable displacement compressor.

[0016] In some embodiments, the storage medium stores program instructions that, when executed, perform the control method for a variable capacity compressor air conditioner as described above.

[0017] The control method and apparatus for a variable capacity compressor air conditioner, the variable capacity compressor air conditioner, and the storage medium provided in this disclosure can achieve the following technical effects:

[0018] In this embodiment, when the air conditioner is operating in heating mode, the difference between the exhaust temperature and the saturation temperature corresponding to the exhaust pressure is calculated. If the difference is small, it indicates that the air conditioner is building up superheat slowly. At this time, the refrigerant discharged by the compressor is in a gas-liquid mixture or a saturated gaseous state. This state of refrigerant easily forms liquid refrigerant after flowing into the low-temperature variable-volume cavity. Therefore, in this case, the electric heating device on the exhaust pipe is activated to increase the exhaust superheat. This avoids liquid accumulation in the variable-volume cavity and eliminates noise caused by impact due to liquid accumulation.

[0019] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0021] Figure 1 This is a structural diagram of a conventional variable capacity compressor air conditioner;

[0022] Figure 2 This is a schematic diagram of the structure of a variable capacity compressor air conditioner provided in an embodiment of this disclosure;

[0023] Figure 3 This is a schematic diagram comparing the pressure pulsation in the variable displacement chamber during the startup process of the variable displacement compressor of the present invention and the prior art;

[0024] Figure 4 This is a schematic diagram of the structure of an electric heating device for a variable capacity compressor air conditioner provided in an embodiment of this disclosure;

[0025] Figure 5 This is a schematic diagram of a control method for a variable capacity compressor air conditioner provided in an embodiment of this disclosure;

[0026] Figure 6 This is a schematic diagram of another control method for a variable capacity compressor air conditioner provided in an embodiment of this disclosure;

[0027] Figure 7 This is a schematic diagram of another control method for a variable capacity compressor air conditioner provided in an embodiment of this disclosure;

[0028] Figure 8 This is a schematic diagram of a control device for a variable capacity compressor air conditioner provided in an embodiment of this disclosure;

[0029] Figure 9 This is a schematic diagram of another variable capacity compressor air conditioner provided in an embodiment of this disclosure.

[0030] Figure label:

[0031] 10. Variable displacement compressor; 20. Condenser; 30. Expansion valve; 40. Evaporator; 50. Distributor; 60. Variable displacement tank; 70. Electric heating device; 80. Controller;

[0032] 11. Partition plate; 12. Variable displacement cylinder; 13. Lower roller; 14. Lower bearing; 16. Variable displacement cavity; 17. Variable displacement slide plate; 18. Pin; 19. Pin slot; 31. Second solenoid valve; 32. First solenoid valve; 41. First branch; 42. Second branch; 71. Housing; 72. Inner channel; 73. Heating resistor; 91. First temperature sensor; 92. Pressure sensor; 93. Second temperature sensor. Detailed Implementation

[0033] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0034] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0035] Unless otherwise stated, the term "multiple" means two or more.

[0036] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0037] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0038] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0039] Combination Figure 1 The existing variable displacement compressor 10 includes a variable displacement cylinder 12, a partition 11 located above the variable displacement cylinder, a lower bearing 14 located below the variable displacement cylinder 12, and a variable displacement vane 17 located on one side of the variable displacement cylinder. The partition 11, the variable displacement cylinder 12, the lower bearing 14, and the tail end of the variable displacement vane 17 form a sealed cavity, which is the variable displacement cavity 16. A pin 18 is provided under the lower bearing, and a pin slot 19 is provided on the variable displacement vane 17; a pin spring is provided at the lower part of the pin 18, and the pin can move up and down under the action of unbalanced forces at the upper and lower ends to achieve contact and disengagement with the variable displacement vane. The variable displacement cavity 16 is connected to the lower end of the variable displacement cylinder tank 60 through a pipeline, and the upper end of the variable displacement cylinder tank 60 is connected to the suction port of the distributor 50 and the exhaust port of the compressor 10 through a first solenoid valve 32 and a second solenoid valve 31, respectively.

[0040] When the second solenoid valve 31 is closed and the first solenoid valve 32 is open, the variable displacement chamber 16 is connected to the compressor distributor suction port. The pin 18 moves upward under the action of the pin spring, and the head of the pin 18 engages in the pin slot 19 of the variable displacement vane. The variable displacement vane 17 disengages from the lower roller 13, and the variable displacement cylinder 12 stops working. When the second solenoid valve 32 is open and the first solenoid valve 31 is closed, the variable displacement chamber 16 is connected to the compressor discharge port. Under the action of the high discharge pressure, the pin 18 overcomes the spring force of the pin spring and moves downward, disengaging from the variable displacement vane 17, and the variable displacement cylinder 12 begins to work. At this time, if the compressor discharge carries a large amount of liquid refrigerant into the variable displacement cylinder tank 60 and the variable displacement chamber 16, a large pressure pulsation will occur in the variable displacement chamber 16 due to the reciprocating motion of the variable displacement vane 17. This results in uneven force on the variable displacement vane 17 and poorer following performance of the lower roller 13. The variable displacement vane 17 becomes unstable and detaches from the lower roller 13. Within the vane groove, the variable displacement vane 17 impacts the lower roller and the inner wall of the variable displacement cavity, producing an abnormal "crackling" noise. Therefore, under normal operating conditions, it is forbidden for a large amount of liquid refrigerant to accumulate in the variable displacement cavity 16 and the variable displacement tank 60.

[0041] After an air conditioning system has been idle for a long time in a low-temperature environment during winter, the outdoor unit remains at a low temperature. When the compressor first starts, the air conditioning system establishes a pressure difference between the intake and exhaust gases and builds up superheat relatively slowly. When the variable displacement compressor switches to dual-cylinder operation (variable displacement cylinder starts working) mode, because the exhaust gas is a two-phase mixture of gas and liquid or saturated gas, a large amount of liquid will accumulate inside the subcooled variable displacement cylinder tank and variable displacement chamber. When there is a large amount of liquid accumulation in the variable displacement chamber, the pressure pulsation at the tail of the variable displacement vane will increase sharply, causing the variable displacement vane to become unstable and impact within the vane slot, generating abnormal noise.

[0042] In response to the above problems, combined with Figure 2 As shown, this embodiment of the present disclosure provides a variable capacity compressor air conditioner including a variable capacity compressor and an electric heating device. The exhaust port of the variable capacity compressor is connected to the variable capacity chamber of the variable capacity compressor through an exhaust pipe. The electric heating device is disposed on the exhaust pipe and is used to heat the refrigerant in the exhaust pipe.

[0043] Thus, when the multi-split air conditioning system with a variable-capacity compressor starts in heating mode, if the ambient temperature is low, the electric heating device will be activated. This heats the refrigerant discharged from the compressor, turning it into superheated gaseous refrigerant, which then flows back to the variable-capacity chamber. This effectively prevents liquid accumulation in the variable-capacity chamber and eliminates noise caused by excessive pressure pulsation due to liquid buildup. Figure 3 As shown, in existing multi-split air conditioning systems with variable capacity compressors, after prolonged low-temperature quiescence in a low-temperature environment, if the heating mode is activated, the pressure pulsation during fluid accumulation in the variable capacity cavity can reach up to approximately 16 bar (curve 1). In this application, after heating with an electric heating device, the pressure pulsation within the variable capacity cavity is significantly reduced, with the highest pressure pulsation being approximately 1 bar (curve 2).

[0044] Optionally, such as Figure 4 As shown, the electric heating device 70 includes a housing 71 and an inner channel 72 disposed within the housing. A heating resistor 73 is disposed inside the housing. The inner channel 72 includes an inlet end and an outlet end; the inlet end is connected to an exhaust port, and the outlet end is connected to a variable-capacity cavity via an exhaust pipe; it is used for the flow of refrigerant, and the inner channel has a curved structure.

[0045] Here, the electric heating device includes a housing, inside which a heating resistor is installed. An inner channel is also located inside the housing, with the heating resistor situated around the periphery of the inner channel. Refrigerant flows through the inner channel, which is connected to the exhaust pipe. When the refrigerant discharged from the variable-capacity compressor flows through the inner channel of the electric heating device, it is heated by the heating resistor and then flows into the variable-capacity chamber. Furthermore, the inner channel of the electric heating device has a curved structure, which increases the contact area with the heating resistor. For example, the inner channel has an S-shaped structure. Optionally, the inner channel is a copper tube structure. This also facilitates rapid heat exchange.

[0046] Optionally, the exhaust pipe includes a first branch 41 and a second branch 42. The first branch 41 has a first end connected to the outlet end of the electric heating device and a second end connected to the condenser. The second branch 42 has a first end connected to the outlet end of the electric heating device and a second end connected to the variable displacement chamber of the variable displacement compressor.

[0047] Here, the heated refrigerant is divided into two paths. One path flows into the variable displacement chamber, preventing liquid accumulation and fundamentally solving the problem of sudden pressure fluctuations caused by liquid buildup. This ensures smooth operation of the variable displacement vanes, thus resolving the noise issue. The other path flows into the outdoor unit's condenser (in cooling mode, the outdoor unit's heat exchanger is the condenser, hence the term "condenser"), circulating in the refrigerant loop. This is equivalent to providing auxiliary electric heating to the air conditioning system during the low-temperature start-up phase, achieving the effect of quickly delivering hot air upon startup.

[0048] In some embodiments, the exhaust pipe at the outlet end of the electric heating device is a three-way pipe, wherein the first branch is connected to the condenser and the second branch is connected to the variable volume chamber.

[0049] Optionally, the variable capacity compressor air conditioner also includes a first temperature sensor 91, a pressure sensor 92, and a controller 80. The first temperature sensor 91 is located at the exhaust port and is used to detect the exhaust temperature. The pressure sensor 92 is located at the exhaust port and is used to detect the refrigerant pressure. The controller 80 is electrically connected to the first temperature sensor 91, the pressure sensor 92, and the electric heating device.

[0050] Here, the controller makes logical judgments based on the temperature and pressure at the exhaust port to control the opening or closing of the electric heating device, thereby realizing the intelligent start and stop of the electric heating device.

[0051] Optionally, the variable capacity compressor air conditioner also includes a second temperature sensor 93. The second temperature sensor is located at the outlet end of the electric heating device and is used to detect the temperature of the heated refrigerant.

[0052] Here, the electric heating device is a high-power component, and its continuous overheating will reduce its lifespan. Therefore, the temperature of the refrigerant at the outlet of the electric heating device is monitored. If the refrigerant temperature is too high, the electric heating device is shut down. This provides power-off protection for the electric heating device, and it will restart after the temperature drops.

[0053] Combination Figure 5 As shown, this disclosure provides a control method for a variable capacity compressor air conditioner, including:

[0054] S601, when the variable capacity compressor air conditioner is in heating mode, the processor obtains the discharge temperature, discharge pressure and the saturated steam temperature corresponding to the discharge pressure of the variable capacity compressor.

[0055] S602, when the difference between the exhaust temperature and the saturated steam temperature is less than a first temperature, the processor controls the electric heating device to start.

[0056] In this embodiment, when the variable-capacity compressor air conditioner is in heating mode, the discharge temperature and discharge pressure of the variable-capacity compressor are detected. Based on the correspondence between discharge pressure and saturated vapor temperature, the saturated vapor temperature corresponding to the current discharge pressure is obtained. Furthermore, the difference between the current discharge temperature and the saturated vapor temperature is obtained. If the difference is small, it indicates low superheat, and the discharge is a gas-liquid mixture or saturated gas. Therefore, the electric heating device is activated, and the saturated gaseous refrigerant or gas-liquid mixture discharged from the compressor is heated by the electric heating device to become a superheated gas flow. This avoids noise caused by a large amount of liquid refrigerant flowing into the variable-capacity chamber.

[0057] Furthermore, it should be noted that the electric heating device's heating is unaffected by the compressor's single-cylinder or dual-cylinder operating modes; heating is determined based on the aforementioned control logic. That is, heating may only occur during single-cylinder operation, or it may stop heating before switching to dual-cylinder mode, or it may continue heating even after switching from single-cylinder to dual-cylinder mode.

[0058] The control method for a variable-capacity compressor air conditioner provided in this disclosure calculates the difference between the exhaust temperature and the saturation temperature corresponding to the exhaust pressure when the air conditioner is operating in heating mode. If the difference is small, it indicates that the air conditioner is building up superheat slowly. At this time, the refrigerant discharged by the compressor is in a gas-liquid mixture or a saturated gaseous state. This state of refrigerant easily forms liquid refrigerant after flowing into the low-temperature variable-capacity cavity. Therefore, in this case, the electric heating device on the exhaust pipe is activated to increase the exhaust superheat. This avoids liquid accumulation in the variable-capacity cavity and eliminates noise caused by impact due to liquid accumulation.

[0059] Optionally, the first temperature can be in the range of 8℃-12℃, such as 10℃.

[0060] Combination Figure 6 As shown, this disclosure provides another control method for a variable capacity compressor air conditioner, including:

[0061] S601, when the variable capacity compressor air conditioner is in heating mode, the processor obtains the discharge temperature, discharge pressure and the saturated steam temperature corresponding to the discharge pressure of the variable capacity compressor.

[0062] S602, when the difference between the exhaust temperature and the saturated steam temperature is less than a first temperature, the processor controls the electric heating device to start.

[0063] S703, the processor obtains the heating time of the electric heating device and the refrigerant temperature at the end of the electric heating device.

[0064] S704, if the heating duration is greater than or equal to the first duration or the refrigerant temperature is greater than the second temperature, the processor controls the electric heating device to shut down.

[0065] As mentioned earlier, the "end" of the electric heating device refers to its outlet. After the electric heating device is started, the refrigerant temperature at the outlet is monitored to control the maximum heating temperature. When the refrigerant temperature exceeds a second temperature, the electric heating device is shut down to provide overheat protection. The second temperature ranges from 120℃ to 125℃.

[0066] Simultaneously, the heating time of the electric heating device is recorded. If the heating time meets the first set time requirement, the electric heating device is shut off. Understandably, variable-capacity compressor air conditioners experience abnormal noise during their initial heating start-up after prolonged periods of inactivity in low-temperature winter environments. As the suction and discharge pressure difference and exhaust superheat of the air conditioning system gradually stabilize, the variable-capacity chamber will no longer accumulate large amounts of liquid, causing abnormal noise. Therefore, the electric heating device is shut off after the first set heating time is met. Based on extensive experimental data and big data monitoring, the first set heating time ranges from 10 to 15 minutes. Furthermore, after the first heating time, the air conditioning system piping (mainly the outdoor unit) is also effectively preheated.

[0067] Optionally, in step S704, after the processor controls the electric heating device to shut down when the refrigerant temperature is greater than the second temperature, the following steps are also included:

[0068] If the difference is less than the first temperature during the first period of operation of the variable capacity compressor, the processor will restart the electric heating device.

[0069] Here, during the initial startup of the variable displacement compressor, if the electric heating device shuts off due to excessively high heating temperature, and after the refrigerant temperature drops to the third temperature, if the difference between the exhaust temperature and the saturated vapor temperature corresponding to the exhaust pressure is still less than the second temperature, the electric heating device will be restarted. If, after the refrigerant temperature drops to the third temperature, the operating time of the variable displacement compressor exceeds the first time, or the difference is greater than or equal to the first temperature, the electric heating device will no longer be restarted. The difference between the second and third temperatures is greater than or equal to 5°C.

[0070] Combination Figure 7 As shown, this disclosure provides another control method for a variable capacity compressor air conditioner, including:

[0071] S601, when the variable capacity compressor air conditioner is in heating mode, the processor obtains the discharge temperature, discharge pressure and the saturated steam temperature corresponding to the discharge pressure of the variable capacity compressor.

[0072] S602, when the difference between the exhaust temperature and the saturated steam temperature is less than a first temperature, the processor controls the electric heating device to start.

[0073] S703, the processor obtains the heating time of the electric heating device and the refrigerant temperature at the end of the electric heating device.

[0074] S704, if the heating duration is greater than or equal to the first duration or the refrigerant temperature is greater than the second temperature, the processor controls the electric heating device to shut down.

[0075] S805, if the temperature difference is greater than or equal to the first temperature, the processor controls the electric heating device to shut down.

[0076] Here, once the difference between the exhaust temperature and the saturated steam temperature is greater than or equal to the first temperature, it indicates that the compressor's exhaust superheat is adequate. At this point, the variable displacement chamber will not cause abnormal noise due to excessive liquid accumulation. Therefore, the electric heating device can be shut off. However, if the compressor's operating time is less than the first duration at this time, the compressor is still in the initial stage of operation and is unstable. Therefore, it is necessary to continue monitoring the difference, and when the difference is less than the first temperature, the electric heating device should be turned on again. This process is repeated until the operating time reaches the first duration.

[0077] Combination Figure 8 As shown, this disclosure provides a control device 200 for a variable capacity compressor air conditioner, including a processor 100 and a memory 101. Optionally, the device may further include a communication interface 102 and a bus 103. The processor 100, communication interface 102, and memory 101 can communicate with each other via the bus 103. The communication interface 102 can be used for information transmission. The processor 100 can call logical instructions in the memory 101 to execute the control method for the variable capacity compressor air conditioner described in the above embodiment.

[0078] Furthermore, the logic instructions in the aforementioned memory 101 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0079] The memory 101, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 100 executes functional applications and data processing by running the program instructions / modules stored in the memory 101, thereby implementing the control method for the variable capacity compressor air conditioner in the above embodiments.

[0080] The memory 101 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 101 may include high-speed random access memory and may also include non-volatile memory.

[0081] Combination Figure 9As shown, this embodiment of the disclosure provides a variable-capacity compressor air conditioner 300, including: a refrigerant circulation system consisting of a variable-capacity compressor 10, a condenser 20, a throttle valve 30, an evaporator 40, and a distributor 50, as well as the aforementioned control device 200 for the variable-capacity compressor air conditioner. The discharge port of the variable-capacity compressor is connected to the variable-capacity chamber of the compressor via an discharge pipe. An electric heating device 70 is connected in series in the discharge pipe for heating the refrigerant discharged from the compressor.

[0082] The first temperature sensor 91 is located at the exhaust port and is used to detect the exhaust temperature. The second temperature sensor 93 is located at the outlet of the electric heating device and is used to detect the temperature of the heated refrigerant. The pressure sensor 92 is located at the exhaust port and is used to detect the refrigerant pressure.

[0083] The control device 200 for a variable capacity compressor air conditioner is installed in the air conditioner. The installation relationship described herein is not limited to placement within the product, but also includes installation connections with other components of the product, including but not limited to physical connections, electrical connections, or signal transmission connections. Those skilled in the art will understand that the control device 200 for a variable capacity compressor air conditioner can be adapted to feasible product bodies to achieve other feasible embodiments.

[0084] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to execute the above-described control method for a variable capacity compressor air conditioner.

[0085] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0086] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0087] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0088] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0089] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0090] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method for a variable- capacity compressor air conditioner, characterized by, The exhaust port of the variable displacement compressor is connected to the variable displacement chamber of the variable displacement compressor through an exhaust pipeline, and an electric heating device is arranged on the exhaust pipeline. In the case that the variable displacement compressor air conditioner executes the heating mode, the exhaust temperature, the exhaust pressure and the saturated steam temperature corresponding to the exhaust pressure of the variable displacement compressor are obtained; In the case that the difference between the exhaust temperature and the saturated steam temperature is less than a first temperature, the electric heating device is controlled to start.

2. The method of claim 1, wherein, After the electric heating device is controlled to start, the method further comprises: The heating time length of the electric heating device and the refrigerant temperature at the end of the electric heating device are obtained; In the case that the heating time length is greater than or equal to a first time length and / or the refrigerant temperature is greater than a second temperature, the electric heating device is controlled to be closed.

3. The method of claim 2, wherein, In the case that the refrigerant temperature is greater than the second temperature, after the electric heating device is controlled to be closed, the method further comprises: In the case that the difference is less than the first temperature within the first time length of the operation of the variable displacement compressor, the electric heating device is re-controlled to start.

4. The method according to any one of claims 1 to 3, characterized in that, Further comprising: In the case that the difference is greater than or equal to the first temperature, the electric heating device is controlled to be closed.

5. A control device for a variable-capacity compressor air conditioner, comprising a processor and a memory having stored program instructions, characterized by, The processor is configured to execute the control method for the variable displacement compressor air conditioner as claimed in any one of claims 1 to 4 when the program instructions are executed.

6. A variable capacity compressor air conditioner characterized by Comprise: A variable displacement compressor, whose exhaust port is communicated with the variable displacement chamber of the variable displacement compressor through an exhaust pipeline; An electric heating device, which is connected in series on the exhaust pipeline and is used for heating the refrigerant discharged by the compressor; and the control device for the variable displacement compressor air conditioner as claimed in claim 5 is installed in the variable displacement compressor air conditioner.

7. The variable-capacity compressor air conditioner according to claim 6, characterized by The electric heating device comprises: A shell, which is internally provided with a heating resistor; An inner channel, which comprises an inlet end and an outlet end, the inlet end of which is connected to the exhaust port, and the outlet end of which is connected to the variable displacement chamber through the exhaust pipeline; the inner channel is used for circulating the refrigerant and is of a curved structure.

8. The variable-capacity compressor air conditioner according to claim 6, characterized by The exhaust pipeline comprises: A first branch, whose first end is connected to the outlet end of the electric heating device, and whose second end is connected to the condenser; A second branch, whose first end is connected to the outlet end of the electric heating device, and whose second end is connected to the variable displacement chamber of the variable displacement compressor.

9. The variable-capacity compressor air conditioner according to claim 6, characterized by Further comprising: A first temperature sensor, which is arranged at the exhaust port and is used for detecting the exhaust temperature; A pressure sensor, which is arranged at the exhaust port and is used for detecting the refrigerant pressure.

10. A storage medium storing program instructions, characterized in that, The program instructions are executed to execute the control method for the variable displacement compressor air conditioner as claimed in any one of claims 1 to 4.

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