CN109538457B - Method and device for controlling cylinder cutting of compressor, unit and air conditioning system - Google Patents
Method and device for controlling cylinder cutting of compressor, unit and air conditioning system Download PDFInfo
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- CN109538457B CN109538457B CN201811180119.6A CN201811180119A CN109538457B CN 109538457 B CN109538457 B CN 109538457B CN 201811180119 A CN201811180119 A CN 201811180119A CN 109538457 B CN109538457 B CN 109538457B
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- way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
Abstract
The invention discloses a method, a device and a unit for controlling cylinder cutting of a compressor, and an air conditioning system. Wherein, the method comprises the following steps: the method comprises the steps of receiving a working mode conversion instruction, adjusting system control parameters to enable operation parameters to meet four-way valve reversing conditions after the working mode conversion instruction is received, controlling the four-way valve to reverse, and controlling the compressor to be switched from a single-cylinder operation mode to a double-cylinder operation mode. The factor that makes system's pressure differential produce the fluctuation is given priority to the consideration to ensure the compressor and stably maintain at double-cylinder running state, ensured the efficiency of unit, improved user's use and experienced.
Description
Technical Field
The invention relates to the technical field of units, in particular to a method and a device for controlling cylinder cutting of a compressor, a unit and an air conditioning system.
Background
At present, in order to solve the problems of low load and poor energy efficiency of a multi-connected unit, a single-cylinder and double-cylinder switching technology of a compressor is developed. In the actual operation of unit, the cylinder cutting failure phenomenon of compressor is comparatively common. For example: in the cylinder cutting process of the compressor, due to the change of components such as a fan and an electronic expansion valve in a unit, the normal cylinder cutting of the compressor is possibly influenced. For another example: after the compressor is switched to the double-cylinder operation, the double-cylinder operation state of the compressor is difficult to maintain due to the reversing of the four-way valve, so that the energy efficiency of a unit is reduced, and the use experience of a user is influenced.
Aiming at the problem that the double-cylinder state of the compressor is difficult to maintain due to the reversing of a four-way valve in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device, a unit and an air conditioning system for controlling cylinder cutting of a compressor, and aims to solve the problem that the double-cylinder state of the compressor is difficult to maintain due to the fact that a four-way valve is reversed in the prior art.
In order to solve the technical problem, in a first aspect, an embodiment of the present invention provides a method for controlling a cylinder cutting of a compressor, where the method includes:
receiving a working mode conversion instruction;
after receiving a working mode conversion instruction, adjusting system control parameters to enable the operation parameters to meet four-way valve reversing conditions, and controlling the four-way valve to reverse;
and controlling the compressor to be switched from a single-cylinder operation mode to a double-cylinder operation mode.
Further, before receiving the operation mode conversion instruction, the method further comprises:
determining that the compressor needs to be switched from a single cylinder mode of operation to a dual cylinder mode of operation.
Further, before receiving the operation mode conversion instruction, the method further comprises:
determining that the compressor is in a dual cylinder mode of operation;
prior to controlling the four-way valve commutation, the method further comprises:
and controlling the compressor to be switched from a double-cylinder operation mode to a single-cylinder operation mode.
Further, after controlling the four-way valve to commutate, the method further comprises:
judging whether the system pressure difference is in a preset system pressure difference interval or not;
if not, continuously adjusting the system control parameters to enable the system pressure difference to be in a preset system pressure difference interval;
the preset system pressure difference interval is a system pressure difference interval required by the compressor to maintain a double-cylinder operation mode.
Further, determining that the compressor needs to be switched from the single-cylinder operating mode to the two-cylinder operating mode comprises:
if the current required operating frequency of the compressor is greater than the maximum frequency threshold value which can be reached when the single-cylinder operating mode of the compressor is adopted, the fact that the compressor needs to be switched from the single-cylinder operating mode to the double-cylinder operating mode is determined;
wherein the currently demanded operating frequency of the compressor is determined according to at least one of the following three factors: setting a difference value between a temperature value and an environment temperature value, setting a fan gear and the capacity of an internal machine of a unit where the compressor is located.
Further, the operation parameters are system pressure difference and operation frequency of the compressor, and adjusting the system control parameters to enable the operation parameters to meet the four-way valve reversing condition comprises:
increasing the operating frequency at a preset speed until reaching a maximum frequency threshold;
and during the period of increasing the running frequency at a preset speed, adjusting the system control parameters to enable the system pressure difference and the running frequency to meet the four-way valve reversing condition.
Further, the four-way valve reversing condition is as follows: the system pressure difference is greater than or equal to a reversing preset pressure difference of the four-way valve; and the difference between the running frequency and the reversing preset frequency of the four-way valve is less than or equal to the preset difference; and the running frequency is less than or equal to the reversing preset frequency of the four-way valve.
Further, adjusting the system control parameter includes at least one of:
reducing the rotating speed of the outdoor fan and the indoor fan;
the steps of the outdoor electronic expansion valve and the indoor electronic expansion valve are reduced.
Further, in a case where the adjusting the system control parameter includes decreasing the rotation speeds of the outdoor fan and the indoor fan, the decreasing the rotation speeds of the outdoor fan and the indoor fan includes: controlling the outdoor fan and the indoor fan to be closed;
in the case that adjusting the system control parameter includes reducing the number of steps of the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve, reducing the number of steps of the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve includes: and controlling the electronic expansion valve of the outdoor unit and the electronic expansion valve of the indoor unit to be closed.
Further, after controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode, the method further comprises:
under the condition that the adjustment of the system control parameters comprises the reduction of the rotating speeds of the outdoor fan and the indoor fan, controlling the outdoor fan and the indoor fan to recover the normal working state;
and under the condition that the adjustment of the system control parameters comprises the reduction of the steps of the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve, controlling the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve to recover the normal working state.
Further, the normal working state is an automatic control state.
Further, before controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode, the method further comprises: providing single cylinder torque compensation to the compressor.
Further, after controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode, the method further comprises: providing dual cylinder torque compensation to the compressor.
Further, before controlling the compressor to switch from the single-cylinder mode of operation to the two-cylinder mode of operation, the method includes:
controlling the first electromagnetic valve to be powered off, and powering on the second electromagnetic valve so as to enable the variable-capacity port of the compressor to be in a low-voltage state; the first electromagnetic valve can enable an exhaust port of the compressor to be communicated with the variable volume port, and the exhaust port is in a high-pressure state; the second electromagnetic valve can enable the air suction port of the compressor to be communicated with the variable volume port, and the air suction port is in a low-pressure state.
Further, controlling the compressor to switch from the single-cylinder mode of operation to the two-cylinder mode of operation comprises:
controlling a first electromagnetic valve to be powered on, and controlling a second electromagnetic valve to be powered off so as to enable a variable volume port of the compressor to be in a high-pressure state, wherein the first electromagnetic valve can enable an exhaust port of the compressor to be communicated with the variable volume port, and the exhaust port is in the high-pressure state; the second electromagnetic valve can enable the air suction port of the compressor to be communicated with the variable volume port, and the air suction port is in a low-pressure state.
Further, the operation mode includes a cooling mode or a heating mode.
In a second aspect, an embodiment of the present invention provides an assembly configured to execute the method in the first aspect, where the assembly includes: a main controller, a compressor, a driving controller of the compressor and a four-way valve,
the main controller is used for triggering the unit to adjust the system control parameters after the unit receives the working mode conversion instruction, so that the operation parameters meet the four-way valve reversing condition, and sending a control instruction to the four-way valve;
the four-way valve is connected with the main controller and used for reversing according to the received control command;
the main controller is used for sending a cylinder switching instruction to the driving controller after the four-way valve switches direction according to the received control instruction;
and the driving controller is used for controlling the compressor to be switched from a single-cylinder operation mode to a double-cylinder operation mode according to the cylinder switching instruction.
In a third aspect, an embodiment of the present invention provides an apparatus for controlling cylinder cutting of a compressor, the apparatus being configured to perform the method of the first aspect, the apparatus including:
the receiving module is used for receiving a working mode conversion instruction;
the control module is used for adjusting system control parameters to enable the operation parameters to meet the four-way valve reversing condition and controlling the four-way valve to reverse after receiving the working mode conversion instruction; and the controller is also used for controlling the compressor to be switched from a single-cylinder operation mode to a double-cylinder operation mode.
In a fourth aspect, an embodiment of the present invention provides an air conditioning system, which includes the unit set in the second aspect.
Further, the air conditioning system is a variable frequency variable capacity air conditioning system.
By applying the technical scheme of the invention, the working mode conversion instruction is received, the system control parameter is adjusted to enable the operation parameter to meet the four-way valve reversing condition after the working mode conversion instruction is received, the four-way valve is controlled to reverse, and the compressor is controlled to be switched from the single-cylinder operation mode to the double-cylinder operation mode. The factor that makes system's pressure differential produce the fluctuation is given priority to the consideration to ensure the compressor and stably maintain at double-cylinder running state, ensured the efficiency of unit, improved user's use and experienced.
Drawings
FIG. 1 is a flow chart of a method of controlling compressor cylinder cut in accordance with an embodiment of the present invention;
FIG. 2 is a flow chart of a method of controlling compressor cylinder cut in accordance with an embodiment of the present invention;
FIG. 3 is a flow chart of a method of controlling compressor cylinder cut in accordance with an embodiment of the present invention;
FIG. 4 is a flow chart of a method of controlling compressor cylinder cut in accordance with an embodiment of the present invention;
FIG. 5 is a block diagram of an assembly according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an assembly according to an embodiment of the present invention;
fig. 7 is a block diagram illustrating an apparatus for controlling a cylinder cutting of a compressor according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, it being understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The problem that the double-cylinder state of the compressor is difficult to maintain due to the fact that the four-way valve is reversed is solved. An embodiment of the present invention provides a method for controlling a cylinder cutting of a compressor, as shown in fig. 1, the method includes:
step S101, receiving a working mode conversion instruction;
step S102, after receiving a working mode conversion instruction, adjusting system control parameters to enable the operation parameters to meet four-way valve reversing conditions, and controlling the four-way valve to reverse;
and step S103, controlling the compressor to be switched from the single-cylinder operation mode to the double-cylinder operation mode.
Wherein, the working mode is a cooling mode or a heating mode.
In this embodiment, the four-way valve is controlled firstly for reversing, and then the cylinder is cut after the four-way valve is reversed, so that the problem that the double-cylinder state is difficult to maintain due to fluctuation of system pressure difference caused by reversing of the four-way valve after the cylinder is cut firstly is solved, and the system pressure difference generates fluctuation factors by priority consideration, so that the compressor is stably maintained in the double-cylinder running state, the energy efficiency of a unit is guaranteed, and the use experience of a user is improved.
In a possible implementation manner, before receiving the operation mode conversion instruction in step S101, the method further includes: and starting the unit. And before step S101, two cases can be distinguished. The first case is: determining that the compressor needs to be switched from a single-cylinder operation mode to a double-cylinder operation mode, specifically comprising: if the current required operating frequency of the compressor is greater than the maximum frequency threshold value which can be reached when the compressor operates in a single cylinder, determining that the compressor needs to be switched from a single-cylinder operating mode to a double-cylinder operating mode; wherein the currently demanded operating frequency of the compressor is determined according to at least one of the following three factors: setting a difference value between the temperature value and the environment temperature value, setting a fan gear and the capacity of an internal machine at the tail end of the unit where the compressor is located.
The unit is taken as the air conditioner for illustration, and the implementation mode shows that when the requirement of a user on the refrigerating or heating capacity of the air conditioner is higher, so that the compressor is in a single-cylinder operation mode and cannot meet the refrigerating capacity or heating capacity required by the user, the compressor can be switched to a double-cylinder operation mode, so that the refrigerating or heating capacity of the air conditioner is improved. In an application example, if the ambient temperature value is-30 degrees celsius, and the temperature value set by the remote controller is 18 degrees celsius when the user needs to start the heating mode of the air conditioner, the difference between the set temperature value and the ambient temperature value is large. If the user sets the fan gear to be a strong gear (indicating that the user has a high requirement on the heating capacity of the air conditioner), the required operating frequency of the compressor can be determined according to the algorithm relationship between the parameters and the operating frequency of the compressor. And determining whether the frequency has exceeded a maximum frequency threshold that can be tolerated in the single cylinder mode of operation of the compressor. If so, controlling the compressor to be switched from the single-cylinder operation mode to the double-cylinder operation mode so as to meet the use experience of a user.
In addition, in the multi-split system, the requirement on the refrigerating or heating capacity of the air conditioner can be improved when the capacity of the internal machine is increased (for example, after a user opens the air conditioner in a living room, the air conditioner in a bedroom is opened again), and the double-cylinder operation of the compressor can be controlled when the single-cylinder operation mode cannot meet the requirement of the user.
The second case is: determining that the compressor is in the two-cylinder operation mode, before controlling the four-way valve to reverse in step S102, the method further includes: and controlling the compressor to be switched from the double-cylinder operation mode to the single-cylinder operation mode.
It can be appreciated that, in addition to the first case, during the operation of the compressor with two cylinders, switching the four-way valve causes a sudden fluctuation of the system pressure difference, which may result in the failure to maintain the operation state of the compressor with two cylinders. In one illustrative example, a compressor operating in a two-cylinder cooling mode for a period of time may be switched to a two-cylinder heating mode. In order to avoid the problem that the double-cylinder heating state can not be stably maintained, the four-way valve can be controlled to switch to the single-cylinder operation mode from the double-cylinder operation mode before switching, then the four-way valve is controlled to switch to the direction, and then the four-way valve is switched to the double cylinders after switching to the direction, namely the switching process can be expressed as: double-cylinder refrigeration → single-cylinder refrigeration → switching four-way valve, single-cylinder heating → double-cylinder heating. Therefore, the four-way valve can be switched to the double-cylinder heating state before being switched to the double-cylinder heating state, so that the compressor is stably maintained in the double-cylinder running state, the energy efficiency of the unit is guaranteed, and the use experience of a user is improved.
In a possible implementation manner, the operation parameters are a system pressure difference and an operation frequency of the compressor, as shown in fig. 2, the step S102 of adjusting the system control parameter to make the operation parameter satisfy the four-way valve reversing condition includes:
step S1021, increasing the running frequency at a preset speed until reaching a maximum frequency threshold;
and step S1022, during the period of increasing the running frequency at the preset speed, adjusting the system control parameters to enable the system pressure difference and the running frequency to meet the four-way valve reversing condition.
Wherein, the four-way valve reversing condition is as follows: the system pressure difference is greater than or equal to the reversing preset pressure difference of the four-way valve; and the difference between the running frequency and the reversing preset frequency of the four-way valve is less than or equal to the preset difference; and the running frequency is less than or equal to the reversing preset frequency of the four-way valve. When a user sends a working mode switching instruction to the air conditioner through the remote controller, the four-way valve can be reversed. In the prior art, when a double-cylinder operation requirement exists, the double-cylinder operation of the compressor can be directly controlled, if the operation mode is switched, the high pressure of a system can be reduced and the low pressure of the system can be increased within a period of time (for example, 4 or 5 seconds) after the four-way valve is switched, and the pressure difference of the system is the difference between the high pressure of the system and the low pressure of the system, so that the pressure difference of the system can be rapidly reduced. If the four-way valve shifts the front compressor to a double-cylinder running state, the sudden reduction of the system pressure difference can cause the double-cylinder state of the compressor to be difficult to maintain. If the four-way valve shifts to the front compressor and is in a single-cylinder operation state, but after shifting, the four-way valve has a double-cylinder operation requirement, and the system pressure difference at the moment obviously cannot meet the double-cylinder operation requirement. Both of the above situations can affect the user experience. In order to solve the problem, in the implementation mode, after the working mode conversion instruction is received, the running frequency of the compressor is increased at a preset speed until reaching a maximum frequency threshold; during the period of increasing the running frequency of the compressor at a preset speed, detecting and judging whether the system pressure difference is greater than or equal to a reversing preset pressure difference of the four-way valve; and whether the difference value between the running frequency of the compressor and the reversing preset frequency of the four-way valve is smaller than or equal to a preset difference value (can be 30HZ) or not is judged, and the reversing condition of the four-way valve can be represented by a formula B-30, f and B. Wherein, B is the reversing preset frequency of the four-way valve, f is the running frequency, and the preset difference can be 30 HZ. That is, the running frequency of the compressor and the system pressure difference are controlled to meet the reversing condition of the four-way valve, and then the four-way valve is controlled to reverse. It should be noted that the compressor has not been switched to the two-cylinder operation. And after the four-way valve is reversed and the system pressure difference is kept stable and meets the cylinder switching condition, switching to a double cylinder for operation. At the moment, the compressor can be stably maintained in a double-cylinder running state, and the use experience of a user is improved. In a possible implementation mode, the system pressure difference can meet the cylinder cutting condition in a mode that whether the system pressure difference is in a preset system pressure difference interval or not is judged after the four-way valve is controlled to change direction; if not, continuously adjusting the system control parameters to enable the system pressure difference to be in a preset system pressure difference interval.
In one possible implementation, as shown in fig. 3, before controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode in step S103, the method further includes:
and step S104, providing single-cylinder torque compensation for the compressor.
In one possible implementation, as shown in fig. 4, after controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode in step S103, the method further includes:
and step S105, providing double-cylinder torque compensation for the compressor.
Taking an air conditioner as an example, in the prior art, when a user is in a low-temperature environment, the heating mode of the air conditioner is often required to be started, and when the air conditioner has a double-cylinder operation requirement. When the system pressure difference is not increased to a first preset system pressure difference interval, the compressor cannot be actually in a double-cylinder operation mode but operates in a single-cylinder mode, and the heating effect is poor. Meanwhile, the driving controller provides double-cylinder torque compensation for the compressor, so that the compressor body vibrates excessively and rotates unevenly, and the compressor is damaged in severe cases. In the embodiment, after the unit is started, the compressor is firstly ensured to operate in a single-cylinder operation mode, and the system pressure difference is gradually increased by adjusting the system control parameters until the compressor is in a first preset system pressure difference interval. In the process, the driving controller provides single-cylinder torque compensation for the compressor, so that damage caused by excessive vibration of the compressor can be avoided. When the system pressure difference is in a first preset system pressure difference interval, namely the condition of switching to a double-cylinder operation mode is met, the compressor is controlled to be switched from the single-cylinder operation mode to the double-cylinder operation mode, and double-cylinder torque compensation is provided for the compressor so as to provide correct and proper driving force. Therefore, the damage of the compressor caused by the fact that the moment compensation is not in place or the compensation corresponding relation is wrong can be avoided.
In one possible implementation, adjusting the system control parameter includes at least one of:
reducing the rotating speed of the outdoor fan and the indoor fan;
the steps of the outdoor electronic expansion valve and the indoor electronic expansion valve are reduced.
Wherein, reduce the rotational speed of outdoor fan and indoor fan and include: controlling the outdoor fan and the indoor fan to be closed; the step number of reducing the electronic expansion valve of the outdoor unit and the electronic expansion valve of the indoor unit comprises the following steps: and controlling the electronic expansion valve of the outdoor unit and the electronic expansion valve of the indoor unit to be closed.
Wherein, reducing the rotational speed of the outdoor fan so as to close the outdoor fan can prevent the high pressure of the system from reducing because the condenser dispels the heat very fast and causes when the outdoor fan opens, reducing the rotational speed of the indoor fan so as to close the indoor fan can prevent the low pressure of the system from rising because the evaporator absorbs heat very fast and causes when the indoor fan opens. The system pressure difference is the difference between the system high pressure and the system low pressure, and when the system high pressure rises and the system low pressure falls, the system pressure difference can be ensured to be rapidly established. And the steps of the outdoor electronic expansion valve and the indoor electronic expansion valve are reduced, so that the closing of the outdoor electronic expansion valve and the indoor electronic expansion valve can also cause the system pressure difference to increase.
The two steps may be executed alternatively or in parallel, which is not limited in the present invention.
And after step S103, controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode, the method further includes: under the condition of reducing the rotating speeds of the outdoor fan and the indoor fan, controlling the outdoor fan and the indoor fan to recover to normal working states;
and controlling the outdoor electronic expansion valve and the indoor electronic expansion valve to recover to normal working states under the condition of reducing the steps of the outdoor electronic expansion valve and the indoor electronic expansion valve.
Wherein the normal operating state may be an automatic control state. When the compressor is switched from the single-cylinder operation mode to the double-cylinder operation mode, the indoor and outdoor electronic expansion valves and the indoor and outdoor fans are both restored to the automatic control state. Under the automatic control state, the indoor and outdoor electronic expansion valves and the indoor and outdoor fans can correspondingly adjust the control parameters according to the regulation and control information (such as fan gears) sent by a user through a remote controller, the running mode (cooling or heating mode) of the air conditioner and the like, so that the normal running of the air conditioner is prevented from being influenced, and the requirements of the user are met.
In a possible implementation manner, before controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode in step S103, the method further includes:
controlling the first electromagnetic valve to be powered off, and powering on the second electromagnetic valve so as to enable the variable-capacity port of the compressor to be in a low-voltage state;
after step S103, controlling the compressor to switch from the single-cylinder operation mode to the double-cylinder operation mode, the method further includes: and controlling the first electromagnetic valve to be electrified and the second electromagnetic valve to be powered down so that the variable-capacity port of the compressor is changed into a high-pressure state.
The first electromagnetic valve can enable an exhaust port of the compressor to be communicated with the variable volume port, and the exhaust port is in a high-pressure state; the second solenoid valve can make the induction port and the varactor mouth intercommunication of compressor, and induction port department is the low pressure state. When the first electromagnetic valve is powered off, determining that a branch where the first electromagnetic valve is located is in an open circuit state; when the first electromagnetic valve is electrified, determining that a branch where the first electromagnetic valve is located is in a passage state; when the second electromagnetic valve is powered off, determining that the branch where the second electromagnetic valve is located is in an open circuit state; and when the second electromagnetic valve is electrified, determining that the branch where the second electromagnetic valve is located is in a passage state.
The compressor can be controlled to be in a single-cylinder state or a double-cylinder state by powering on or powering off the first electromagnetic valve and the second electromagnetic valve. It will be appreciated that the single and double cylinder compressors are not limited to this configuration.
Fig. 5 shows an assembly according to an embodiment of the invention for performing the method shown in the above embodiment, the assembly comprising: a main controller 1, a compressor 2, a driving controller 3 of the compressor 2, and a four-way valve 6,
the main controller 1 is used for triggering the unit to adjust the control parameters of the system after the unit receives the working mode conversion instruction, so that the operation parameters meet the reversing condition of the four-way valve 6, and sending the control instruction to the four-way valve 6; the four-way valve 6 is connected with the main controller 1 and used for reversing according to the received control instruction; the main controller 1 is used for sending a cylinder switching instruction to the driving controller 3 after the four-way valve 6 switches direction according to the received control instruction; and the driving controller 3 is used for controlling the compressor 2 to be switched from the single-cylinder operation mode to the double-cylinder operation mode according to the cylinder switching instruction.
In a possible implementation, as shown in fig. 5 and 6, the assembly further includes: a high pressure sensor 4 and a low pressure sensor 5 respectively connected to the compressor 2,
the high-voltage sensor 4 is used for detecting the high voltage of the system;
a low pressure sensor 5 for detecting a system low pressure;
the system pressure differential is the difference between the system high pressure and the system low pressure.
In a possible implementation, the main controller 1 is further configured to determine that the compressor 2 needs to be switched from the single-cylinder operation mode to the two-cylinder operation mode before receiving the operation mode switching command. If the current required operating frequency of the compressor 2 is greater than the maximum frequency threshold value which can be reached when the single-cylinder operating mode of the compressor 2 is adopted, the fact that the compressor 2 needs to be switched from the single-cylinder operating mode to the double-cylinder operating mode is determined; wherein the currently demanded operating frequency of the compressor 2 is determined according to at least one of the following three factors: setting a difference value between a temperature value and an environment temperature value, setting a fan gear and the size of the internal machine capacity at the tail end of the unit.
In a possible implementation, as shown in fig. 5 and 6, the assembly further includes: the indoor fan 7, the outdoor fan 8, the outdoor electronic expansion valve 9 and the indoor electronic expansion valve 10 connected with the main controller 1 can adjust system control parameters by reducing the rotating speed of the outdoor fan 7 and the indoor fan 8 and/or reducing the steps of the outdoor electronic expansion valve 9 and the indoor electronic expansion valve 10.
Wherein, reducing the rotational speed of the outdoor fan 7 and the indoor fan 8 may include: turning off the outdoor fan 7 and the indoor fan 8; reducing the number of steps of the outdoor electronic expansion valve 9 and the indoor electronic expansion valve 10 may include closing the outdoor electronic expansion valve 9 and the indoor electronic expansion valve 10.
After the compressor is controlled to be switched from the single-cylinder operation mode to the double-cylinder operation mode, the outdoor fan 7 and the indoor fan 8 are controlled to be in a normal working state under the condition that the rotating speeds of the outdoor fan 7 and the indoor fan 8 are reduced; and controlling the outdoor electronic expansion valve 9 and the indoor electronic expansion valve 10 to return to normal working states under the condition that the step numbers of the outdoor electronic expansion valve 9 and the indoor electronic expansion valve 10 are reduced.
There may be a plurality of indoor fans 7 and indoor electronic expansion valves 10, for example, in a multi-split system, each indoor fan 7 corresponds to one indoor electronic expansion valve 10. The figure shows an example of an indoor fan 7 and an indoor electronic expansion valve 10.
In a possible implementation, the driving controller 3 is further configured to provide single-cylinder torque compensation to the compressor 2 before controlling the compressor 2 to switch from the single-cylinder operation mode to the double-cylinder operation mode, and to provide double-cylinder torque compensation to the compressor 2 after controlling the compressor 2 to switch from the single-cylinder operation mode to the double-cylinder operation mode.
In a possible implementation manner, as shown in fig. 5 and 6, the main controller 1 is further configured to control the first electromagnetic valve 11 to be powered down and the second electromagnetic valve 12 to be powered up when the single-cylinder operation instruction is sent to the drive controller 3, so that the variable volume port 13 of the compressor 2 is in a low-pressure state; the controller is also used for controlling the first electromagnetic valve 11 to be powered on and the second electromagnetic valve 12 to be powered off when a cylinder switching instruction is sent to the driving controller 3, so that the variable-capacity port 13 of the compressor 2 is changed into a high-pressure state, wherein the first electromagnetic valve 11 can enable an exhaust port of the compressor 2 to be communicated with the variable-capacity port 13, and the exhaust port is in the high-pressure state; the second solenoid valve 12 enables the suction port of the compressor 2 to communicate with the variable volume port 13, and the suction port is in a low pressure state.
In a possible implementation, the plant also comprises a gas-liquid separator 14.
Therefore, the four-way valve is controlled to change direction firstly, and then the cylinder is cut after the four-way valve is changed direction, so that the problem that the double-cylinder state is difficult to maintain due to fluctuation of system pressure difference caused by reversing of the four-way valve after the cylinder is cut firstly is solved, the factor that the system pressure difference fluctuates is preferentially considered, the compressor is stably maintained in the double-cylinder running state, the energy efficiency of a unit is guaranteed, and the use experience of a user is improved.
And when the compressor operates in a single cylinder, proper single-cylinder torque compensation is provided for the compressor, so that the damage caused by overlarge vibration of the compressor can be avoided.
Fig. 7 shows an apparatus for controlling cylinder cutting of a compressor according to an embodiment of the present invention, which is used in the method of the first embodiment, the apparatus including:
a receiving module 701, configured to receive a working mode conversion instruction;
the control module 702 is configured to adjust system control parameters to enable the operation parameters to meet four-way valve reversing conditions and control the four-way valve to reverse after receiving the operating mode conversion instruction; and is also used for controlling the compressor to be switched from the single-cylinder operation mode to the double-cylinder operation mode.
Therefore, the four-way valve is controlled to change direction firstly, and then the cylinder is cut after the four-way valve is changed direction, so that the problem that the double-cylinder state is difficult to maintain due to fluctuation of system pressure difference caused by reversing of the four-way valve after the cylinder is cut firstly is solved, the factor that the system pressure difference fluctuates is preferentially considered, the compressor is stably maintained in the double-cylinder running state, the energy efficiency of a unit is guaranteed, and the use experience of a user is improved.
The embodiment of the invention also provides an air conditioning system which comprises the units shown in the figures 6 and 7.
In one possible implementation, the air conditioning system is a variable frequency variable capacity air conditioning system.
It may also be a multi-split system.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a mobile terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments illustrated in the drawings, the present invention is not limited to the embodiments, which are illustrative rather than restrictive, and it will be apparent to those skilled in the art that many more modifications and variations can be made without departing from the spirit of the invention and the scope of the appended claims.
Claims (20)
1. A method of controlling compressor cylinder cut, the method comprising:
receiving a working mode conversion instruction;
after receiving a working mode conversion instruction, adjusting system control parameters to enable the operation parameters to meet four-way valve reversing conditions, and controlling the four-way valve to reverse;
controlling the compressor to be switched from a single-cylinder operation mode to a double-cylinder operation mode;
adjusting the system control parameter includes at least one of:
reducing the rotating speed of the outdoor fan and the indoor fan;
reducing the steps of the outdoor electronic expansion valve and the indoor electronic expansion valve;
in a case where adjusting the system control parameter includes reducing the rotational speeds of the outdoor fan and the indoor fan, reducing the rotational speeds of the outdoor fan and the indoor fan includes: controlling the outdoor fan and the indoor fan to be closed;
in the case that adjusting the system control parameter includes reducing the number of steps of the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve, reducing the number of steps of the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve includes: and controlling the electronic expansion valve of the outdoor unit and the electronic expansion valve of the indoor unit to be closed.
2. The method of claim 1, wherein prior to receiving an operating mode transition command, the method further comprises:
determining that the compressor needs to be switched from a single cylinder mode of operation to a dual cylinder mode of operation.
3. The method of claim 1, wherein prior to receiving an operating mode transition command, the method further comprises:
determining that the compressor is in a dual cylinder mode of operation;
prior to controlling the four-way valve commutation, the method further comprises:
and controlling the compressor to be switched from a double-cylinder operation mode to a single-cylinder operation mode.
4. The method of claim 1, wherein after controlling the four-way valve commutation, the method further comprises:
judging whether the system pressure difference is in a preset system pressure difference interval or not;
if not, continuously adjusting the system control parameters to enable the system pressure difference to be in a preset system pressure difference interval;
the preset system pressure difference interval is a system pressure difference interval required by the compressor to maintain a double-cylinder operation mode.
5. The method of claim 2, wherein determining that the compressor needs to be switched from a single cylinder mode of operation to a dual cylinder mode of operation comprises:
if the current required operating frequency of the compressor is greater than the maximum frequency threshold value which can be reached when the single-cylinder operating mode of the compressor is adopted, the fact that the compressor needs to be switched from the single-cylinder operating mode to the double-cylinder operating mode is determined;
wherein the currently demanded operating frequency of the compressor is determined according to at least one of the following three factors: setting a difference value between a temperature value and an environment temperature value, setting a fan gear and the capacity of an internal machine of a unit where the compressor is located.
6. The method of claim 1, wherein the operating parameters are a system pressure differential and an operating frequency of the compressor, and adjusting the system control parameters such that the operating parameters satisfy a four-way valve commutation condition comprises:
increasing the operating frequency at a preset speed until reaching a maximum frequency threshold;
and during the period of increasing the running frequency at a preset speed, adjusting the system control parameters to enable the system pressure difference and the running frequency to meet the four-way valve reversing condition.
7. The method of claim 6,
the four-way valve has the reversing conditions that: the system pressure difference is greater than or equal to a reversing preset pressure difference of the four-way valve; and the difference between the running frequency and the reversing preset frequency of the four-way valve is less than or equal to the preset difference; and the running frequency is less than or equal to the reversing preset frequency of the four-way valve.
8. The method of claim 1, wherein after controlling the compressor to switch from the single cylinder mode of operation to the two cylinder mode of operation, the method further comprises:
under the condition that the adjustment of the system control parameters comprises the reduction of the rotating speeds of the outdoor fan and the indoor fan, controlling the outdoor fan and the indoor fan to recover the normal working state;
and under the condition that the adjustment of the system control parameters comprises the reduction of the steps of the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve, controlling the outdoor unit electronic expansion valve and the indoor unit electronic expansion valve to recover the normal working state.
9. The method of claim 8,
the normal working state is an automatic control state.
10. The method of claim 1,
before controlling the compressor to switch from the single-cylinder operating mode to the double-cylinder operating mode, the method further comprises:
providing single cylinder torque compensation to the compressor.
11. The method of claim 1,
after controlling the compressor to switch from the single-cylinder mode of operation to the two-cylinder mode of operation, the method further comprises:
providing dual cylinder torque compensation to the compressor.
12. The method of any one of claims 1-11, wherein prior to controlling the compressor to switch from the single cylinder mode of operation to the dual cylinder mode of operation, the method comprises:
controlling the first electromagnetic valve to be powered off, and powering on the second electromagnetic valve so as to enable the variable-capacity port of the compressor to be in a low-voltage state; the first electromagnetic valve can enable an exhaust port of the compressor to be communicated with the variable volume port, and the exhaust port is in a high-pressure state; the second electromagnetic valve can enable the air suction port of the compressor to be communicated with the variable volume port, and the air suction port is in a low-pressure state.
13. The method of any one of claims 1-11, wherein controlling the compressor to switch from a single cylinder mode of operation to a dual cylinder mode of operation comprises:
controlling a first electromagnetic valve to be powered on, and controlling a second electromagnetic valve to be powered off so as to enable a variable volume port of the compressor to be in a high-pressure state, wherein the first electromagnetic valve can enable an exhaust port of the compressor to be communicated with the variable volume port, and the exhaust port is in the high-pressure state; the second electromagnetic valve can enable the air suction port of the compressor to be communicated with the variable volume port, and the air suction port is in a low-pressure state.
14. The method according to any one of claims 1 to 11,
the operation mode includes a cooling mode or a heating mode.
15. An assembly for performing the method of any one of claims 1 to 14, the assembly comprising: a main controller, a compressor, a driving controller of the compressor and a four-way valve,
the main controller is used for triggering the unit to adjust the system control parameters after the unit receives the working mode conversion instruction, so that the operation parameters meet the four-way valve reversing condition, and sending a control instruction to the four-way valve;
the four-way valve is connected with the main controller and used for reversing according to the received control command;
the main controller is used for sending a cylinder switching instruction to the driving controller after the four-way valve switches direction according to the received control instruction;
and the driving controller is used for controlling the compressor to be switched from a single-cylinder operation mode to a double-cylinder operation mode according to the cylinder switching instruction.
16. An apparatus for controlling cylinder cutting of a compressor, the apparatus being adapted to perform the method of any one of claims 1 to 14, the apparatus comprising:
the receiving module is used for receiving a working mode conversion instruction;
the control module is used for adjusting system control parameters to enable the operation parameters to meet the four-way valve reversing condition and controlling the four-way valve to reverse after receiving the working mode conversion instruction; and the controller is also used for controlling the compressor to be switched from a single-cylinder operation mode to a double-cylinder operation mode.
17. An air conditioning system, characterized in that it comprises a unit according to claim 15.
18. The system of claim 17,
the air conditioning system is a variable frequency variable capacity air conditioning system.
19. A computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, implements a method of controlling compressor cylinder cutting according to any one of claims 1 to 14.
20. A storage medium containing computer executable instructions for performing the method of controlling compressor cylinder cut as claimed in any one of claims 1 to 14 when executed by a computer processor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811180119.6A CN109538457B (en) | 2018-10-10 | 2018-10-10 | Method and device for controlling cylinder cutting of compressor, unit and air conditioning system |
| PCT/CN2018/122371 WO2020073488A1 (en) | 2018-10-10 | 2018-12-20 | Method, device, unit and air conditioning system for controlling cylinder cutting of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811180119.6A CN109538457B (en) | 2018-10-10 | 2018-10-10 | Method and device for controlling cylinder cutting of compressor, unit and air conditioning system |
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| CN109538457A CN109538457A (en) | 2019-03-29 |
| CN109538457B true CN109538457B (en) | 2020-05-22 |
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| CN201811180119.6A Active CN109538457B (en) | 2018-10-10 | 2018-10-10 | Method and device for controlling cylinder cutting of compressor, unit and air conditioning system |
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| WO (1) | WO2020073488A1 (en) |
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| CN109357355B (en) | 2018-10-19 | 2020-01-03 | 珠海格力电器股份有限公司 | Air conditioner on-off control method |
| CN110542194B (en) * | 2019-09-24 | 2020-08-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor control method and device, storage medium, processor and compressor |
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| EP2456980B1 (en) * | 2009-07-20 | 2019-06-26 | Carrier Corporation | Suction cutoff unloader valve for compressor capacity control |
| CN101995110B (en) * | 2010-10-29 | 2013-03-27 | 广东美的电器股份有限公司 | Control method of double-cylinder variable-capacity compressor air conditioning system |
| CN102230471B (en) * | 2011-08-05 | 2014-09-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotary compressor with variable volume |
| CN103353156B (en) * | 2013-04-27 | 2017-04-12 | 宁波奥克斯空调有限公司 | Control method for variable frequency air conditioner adopting duplex cylinder compressor |
| CN104654516B (en) * | 2013-11-21 | 2018-03-06 | 珠海格力电器股份有限公司 | The control method and system of frequency conversion positive displacement compressor |
| CN104729138B (en) * | 2013-12-23 | 2017-08-01 | 珠海格力电器股份有限公司 | The determination methods of air conditioner and its volume change |
| CN104930637B (en) * | 2014-03-18 | 2018-02-09 | 珠海格力电器股份有限公司 | Four-way valve reverse control method, device and air-conditioning system |
| CN103884081B (en) * | 2014-04-21 | 2016-04-06 | 珠海格力电器股份有限公司 | The control method of air-conditioning system |
| CN103940051B (en) * | 2014-05-13 | 2017-02-22 | 珠海格力电器股份有限公司 | Air conditioner mode switching control method and system |
| CN105180372B (en) * | 2015-09-29 | 2018-07-31 | Tcl空调器(中山)有限公司 | Air-conditioner control method and device |
| CN105698426A (en) * | 2016-03-03 | 2016-06-22 | 广东美的制冷设备有限公司 | Air conditioning system and control method of air conditioning system |
| CN107860161B (en) * | 2017-09-19 | 2019-08-27 | 珠海格力电器股份有限公司 | Compressor casing switching method, device, storage medium, compressor and equipment |
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| WO2020073488A1 (en) | 2020-04-16 |
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