CN113776236A - Air conditioner, compressor protection method, compressor control system and compressor - Google Patents

Air conditioner, compressor protection method, compressor control system and compressor Download PDF

Info

Publication number
CN113776236A
CN113776236A CN202111006269.7A CN202111006269A CN113776236A CN 113776236 A CN113776236 A CN 113776236A CN 202111006269 A CN202111006269 A CN 202111006269A CN 113776236 A CN113776236 A CN 113776236A
Authority
CN
China
Prior art keywords
compressor
range
load
condenser
refrigerant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111006269.7A
Other languages
Chinese (zh)
Inventor
赖桃辉
林海佳
刘警生
刘帅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202111006269.7A priority Critical patent/CN113776236A/en
Publication of CN113776236A publication Critical patent/CN113776236A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor
    • F25B31/008—Cooling of compressor or motor by injecting a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

The application relates to the technical field of household appliances and discloses an air conditioner, a compressor protection method, a compressor control system and a compressor, wherein the air conditioner comprises the compressor, a heat exchange device, a condenser and a flow control piece; the heat exchange device comprises a first refrigerant circulating pipeline and a second refrigerant circulating pipeline, and the first refrigerant circulating pipeline is wrapped on the shell of the compressor; the compressor is communicated with the condenser through a second refrigerant circulating pipeline; the flow control piece is arranged between the condenser and the heat exchange device and controls the heat exchange quantity of the refrigerant in the first refrigerant circulating pipeline and the compressor through the flow control piece. The first refrigerant circulating pipeline is arranged on the outer side of the shell of the compressor, the refrigerant part discharged by the condenser is used for heat dissipation of a system of the compressor, so that the compressor is in rated working efficiency, and in addition, the heat exchange quantity of the refrigerant and the compressor in the first refrigerant circulating pipeline is controlled by the flow control piece, so that the compressor is adapted to different use environments, and the compressor is cooled quickly and efficiently.

Description

Air conditioner, compressor protection method, compressor control system and compressor
Technical Field
The application relates to the technical field of household appliances, in particular to an air conditioner, a compressor protection method, a compressor control system and a compressor.
Background
At present, global climate warming is achieved, the average ambient temperature of the whole year continuously rises, high-temperature working conditions occur frequently in summer, the ambient temperature of part of regions reaches 52 ℃, and the operating ambient temperature of an air conditioner can reach 58 ℃ in consideration of the situation of direct solar radiation at noon in summer. The unit reliability is particularly important under the high-temperature working condition, the problem that the reliability of the air conditioner is influenced by the high pressure of a system, the self overload of a compressor and the like needs to be avoided, and the compressor needs to have certain refrigerating capacity under the use conditions of the high-temperature working condition and the like so as to improve the self-operation reliability of the air conditioner.
Disclosure of Invention
In order to solve the technical problem that the temperature of the air conditioner compressor system cannot be adjusted, the application provides an air conditioner capable of automatically adjusting the temperature of the air conditioner compressor system, a compressor protection method, a compressor control system and a compressor.
In order to achieve the purpose of the invention, the following technical scheme is adopted in the application:
according to one aspect of the present application, there is provided an air conditioner including a compressor, a heat exchanging device, a condenser, and a flow control member;
the heat exchange device comprises a first refrigerant circulating pipeline and a second refrigerant circulating pipeline, and the first refrigerant circulating pipeline is wrapped on the shell of the compressor;
the compressor is communicated with the condenser through the second refrigerant circulating pipeline;
the flow control element is arranged between the condenser and the heat exchange device so as to control the heat exchange quantity of the refrigerant in the first refrigerant circulating pipeline and the compressor through the flow control element.
According to an embodiment of the present application, the system further comprises a pressure monitoring device disposed on the condenser to detect an operating pressure value of the condenser; and/or the like, and/or,
the temperature monitoring device is arranged outside the outlet end of the compressor so as to detect the outlet end temperature of the compressor; and/or the like, and/or,
the current detection device and a driving circuit signal of the compressor are used for detecting the running current of the compressor so as to obtain the working state of the compressor and control the opening or closing of the flow control element;
and/or;
and the circuit is in signal connection with the whole air conditioner circuit and is used for detecting the running current of the whole air conditioner so as to obtain the working state of the whole air conditioner and control the opening or closing of the flow control piece.
According to an embodiment of the application, wherein still include the evaporimeter, flow control spare includes the throttle regulating part, the throttle regulating part includes first throttle and second throttle, first throttle connect in the condenser with between the evaporimeter, the second throttle set up in the condenser with between the heat transfer device.
According to an embodiment of the present application, the flow control member includes the control valve, and the control valve is disposed between the condenser and the throttling adjustment member, so as to adjust the refrigerant switch in the first refrigerant circulation pipeline through the control valve.
According to an embodiment of the present application, wherein the control valve includes a first solenoid valve and a second solenoid valve, the entry end of the first solenoid valve with the exit end of the condenser is connected, the entry end of the second solenoid valve with the exit end of the first throttling element is connected, the exit end of the first solenoid valve and the exit end of the second solenoid valve all connect in the entry end of the second throttling element.
According to an embodiment of the present application, the evaporator further includes a first node, and the exhaust pipe of the evaporator and the liquid outlet of the first refrigerant circulation pipe are both connected to the first node, and the first node is communicated with the suction port of the compressor.
According to another aspect of the present application, there is provided a compressor protection method including:
acquiring condenser load parameters, and when the condenser load parameters are smaller than a first load threshold value, triggering a starting signal to start a compressor;
acquiring load parameters of a condenser, the exhaust temperature of a compressor and/or the running current of the compressor;
according to the condenser load parameter, if the condenser load is smaller than a first load threshold and larger than a second load threshold, triggering a quick unloading signal, starting a quick unloading flow path at the downstream of the condenser according to the quick unloading signal, inputting a refrigerant in the condenser into a compressor cooling device, and carrying out quick unloading of the load and cooling of the compressor;
converting the temperature of the exhaust gas of the compressor and the running current of the compressor into a compressor load parameter; judging a threshold value according to the load parameter of the compressor, determining that the load state of the compressor is in a safety range, a transition range or a danger range, and triggering a state signal corresponding to the safety range, the transition range or the danger range of the compressor;
and starting a cooling flow path at the downstream of the condenser according to the state signal of the transition range or the danger range of the compressor, and inputting a refrigerant into a compressor cooling device to cool the compressor.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
acquiring an overload parameter threshold value of a compressor in an overload working state, if the exhaust temperature of the compressor is larger than or equal to the overload parameter threshold value range;
and/or;
the compressor running current is greater than or equal to the overload parameter threshold range;
outputting a state signal that the load of the compressor is in an overload working state;
and closing the compressor according to the state signal that the load of the compressor is in the overload working state.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and on the premise that the load parameter of the condenser is smaller than the second load threshold, acquiring a dangerous parameter threshold of the compressor in a dangerous range working state, and starting a quick unloading mode of the cooling flow path to quickly cool the compressor when the exhaust temperature and the running current of the compressor are within the dangerous parameter threshold range.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and when the exhaust temperature and the running current of the compressor are within the range of the parameter threshold value of the transition range, starting a transition unloading mode of the cooling flow path to carry out moderate cooling on the compressor.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and when the exhaust temperature and the running current of the compressor are within the range of the safety parameter threshold, starting a safety unloading mode of the cooling flow path to maintain the load of the compressor within the safety range.
According to an embodiment of the present application, wherein the safe unloading mode of the cooling flow path is initiated to maintain the compressor load within a safe range when the discharge temperature and the operating current of the compressor are within safe parameter threshold ranges, comprising:
and acquiring a safety threshold range of the load parameter of the refrigerant system, and closing the cooling flow path when the pressure of the condenser is in the safety threshold range.
According to another aspect of the present application, there is provided a compressor control system including the compressor protection method.
According to another aspect of the present application, there is provided a compressor including the compressor control system.
According to the technical scheme, the air conditioner, the compressor protection method, the compressor control system and the compressor have the advantages and positive effects that:
set up first refrigerant circulating line through the outside at compressor housing, can be used for the heat dissipation to compressor self system with the discharged refrigerant of condenser, and then can make the compressor be in rated work efficiency, simultaneously through the heat transfer volume of refrigerant in the first refrigerant circulating line of flow control spare and compressor to make the compressor adapt to different service environment, carry out high efficiency's cooling to the compressor, further improve the whole convenience of air conditioner in the use.
The cooling flow path is switched through coupling control according to the exhaust temperature of the compressor, the current of the compressor and the pressure of the condenser by a compressor protection method, and then the cooling device of the compressor is switched to cool the compressor in different modes, so that the reliability of the system on compression protection is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic diagram illustrating an internal system connection principle of an embodiment of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating an internal system connection principle of another embodiment of an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating an internal system connection principle of another embodiment of an air conditioner according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating an overload curve of a compressor in a compressor protection method according to an embodiment of the present disclosure;
FIG. 5 is a schematic flow chart diagram illustrating an embodiment of a method for protecting a compressor according to an embodiment of the present disclosure;
fig. 6 is a schematic flow structure diagram of another embodiment of a method for protecting a compressor according to an embodiment of the present application;
fig. 7 is a schematic flow structure diagram of another embodiment of a method for protecting a compressor according to an embodiment of the present application.
Wherein 1, a compressor; 2. a condenser; 3. an evaporator; 4. a first orifice member; 5. a second orifice member; 6. a first solenoid valve; 7. a second solenoid valve; 8. a first node; 9. a pressure monitoring device; 10. a temperature monitoring device; 11. a current detection device; 100. a first refrigerant circulation pipe; 200. a second refrigerant circulation pipe; 300. a fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Under the condition of high temperature working condition in summer or dirty and blocked outdoor unit, system high-pressure protection or compressor 1 self overload protection easily appears under the unit refrigeration working condition, so that the air conditioner stops working, indoor cooling cannot be achieved, and comfort is affected. According to an aspect of the present application, there is provided an air conditioner including a compressor 1, a heat exchanging device, a condenser 2, and a flow control member;
the heat exchange device comprises a first refrigerant circulating pipeline 100 and a second refrigerant circulating pipeline 200, wherein the first refrigerant circulating pipeline 100 is wrapped on the shell of the compressor 1;
the compressor is communicated with the condenser 2 through the second refrigerant circulating pipeline 200;
the flow control member is disposed between the condenser 2 and the heat exchange device to control a heat exchange amount between the refrigerant in the first refrigerant circulation pipe 100 and the compressor 1 through the flow control member.
Through the first refrigerant circulating pipeline 100 that encircles outside the casing of compressor 1, be used for the refrigerant of condenser 2 exit end for compressor 1 dispels the heat through flow control spare, and then make the interior system of air conditioner realize the self-interacting to compressor 1 self temperature, improve the reliability that the air conditioner used.
In order to improve the detection effect, according to an embodiment of the present application, the system further includes a pressure monitoring device 9 disposed on the condenser 2 to detect an operating pressure value of the condenser 2; and/or the like, and/or,
the temperature monitoring device 10 is arranged outside the outlet end of the compressor 1 and used for detecting the outlet end temperature of the compressor 1; and/or the like, and/or,
the flow control device further comprises a current detection device 11, wherein the current detection device 11 and a driving circuit signal of the compressor 1 are used for detecting the running current of the compressor 1 so as to obtain the working state of the compressor 1 and control the opening or closing of the flow control element;
and/or;
and the circuit is in signal connection with the whole air conditioner circuit and is used for detecting the running current of the whole air conditioner so as to obtain the working state of the whole air conditioner and control the opening or closing of the flow control piece.
Referring to fig. 1 to 4, the opening and closing degree, or the opening and closing state of the flow control member is controlled by detecting the temperature and/or the operating current at the outlet end of the air-conditioning compressor, so as to adjust the heat exchange amount between the refrigerant in the first refrigerant circulation pipe 100 and the shell of the compressor 1.
Specifically, the first refrigerant circulation pipeline 100 is wrapped around the shell of the compressor 1 and can be set as a spiral pipeline or surround the shell structure of the compressor 1, and the heat exchange ratio of the first refrigerant circulation pipeline 100 to the shell of the compressor 1 is adjusted by adjusting the flow speed and flow rate of refrigerant circulation and the material state during circulation.
According to an embodiment of the application, still include evaporimeter 3 wherein, flow control spare includes the throttle regulating part, the evaporimeter with be provided with second refrigerant circulating line 200 between the throttle regulating part, the throttle regulating part includes first throttle 4 and second throttle 5, first throttle 4 connect in condenser 2 with between evaporimeter 3, second throttle 5 set up in condenser 2 with between the heat transfer device.
As an example, the inlet end of the first throttling element 4 and the inlet end of the second throttling element 5 are both connected to the outlet end of the condenser 2, so that the outlet end of the first throttling element 4 is connected to the inlet end of the evaporator 3, and the outlet end of the second throttling element 5 is connected to the inlet end of the first refrigerant circulation pipeline 100, so as to adjust the heat exchange amount at the evaporator 3 through the first throttling element 4, and comprehensively adjust the heat exchange ratio between the compressor 1 and the evaporator 3 through the first throttling element 4 and the second throttling element 5, so as to improve the heat exchange efficiency of the condenser 2 to the whole air conditioning system.
If the ambient temperature is high, the inlet end of the second throttling element 5 may be connected to the outlet end of the first throttling element 4, so as to further reduce the temperature of the refrigerant initially entering the first refrigerant circulation pipeline 100, and improve the cooling efficiency of the casing of the compressor 1.
According to an embodiment of the present application, the flow control element includes the control valve, and the control valve is disposed between the condenser 2 and the throttling adjustment element, so as to adjust the refrigerant switch in the first refrigerant circulation pipeline 100 through the control valve.
The control valve may be configured as an electromagnetic valve to perform on-off adjustment on the refrigerant flow rate in the first refrigerant circulation pipe 100, so as to start or close the first refrigerant circulation pipe 100, thereby improving convenience in use.
Preferably, the control valve includes a first solenoid valve 6 and a second solenoid valve 7, an inlet end of the first solenoid valve 6 is connected to an outlet end of the condenser 2, an inlet end of the second solenoid valve 7 is connected to an outlet end of the first throttling element 4, and both the outlet end of the first solenoid valve 6 and the outlet end of the second solenoid valve 7 are connected to an inlet end of the second throttling element 5.
The superheated gaseous refrigerant discharged from the compressor 1 enters the condenser 2, and is condensed into a high-temperature liquid refrigerant after entering the condenser 2, and the refrigerant flows out, and then the refrigerant is divided into two paths: the refrigerant changes into a low-temperature gas-liquid two-phase refrigerant after flowing through the first throttling element 4, enters the evaporator 3 through the second cooling circulation pipeline 200, absorbs heat and changes into a gaseous refrigerant;
on the other hand, the refrigerant bypasses the first electromagnetic valve 6, so that the high pressure of the system is reduced, the refrigerant can be changed into a low-temperature gas-liquid two-phase refrigerant after passing through the second throttling element 5, enters the heat exchange device through the first refrigerant circulating pipeline 100, is changed into a gaseous refrigerant after absorbing the heat of the cylinder body of the compressor 1, and simultaneously reduces the temperature of the cylinder body of the compressor 1.
Preferably, the two paths of refrigerants are mixed and then sucked, compressed and discharged by the compressor 1, and the above steps are repeated and circulated to the whole air conditioning system. Illustratively, the first node 8 is included, the exhaust pipe of the evaporator 3 and the liquid outlet of the first refrigerant circulating pipe are both connected to the first node 8, and the first node 8 is communicated with the suction port of the compressor 1.
And then need not to add the extra heat transfer of carrying out to compressor 1 of outside heat exchanger, can realize reducing the cost to the protection of air conditioner internal system, improve the convenience of use, reduce the assembly space in the air conditioner.
A fan 300 is further disposed at one side of the evaporator 3 and/or the condenser 2 to improve heat exchange efficiency of the evaporator and the condenser.
Referring to fig. 5-7, according to another aspect of the present application, there is provided a compressor protection method including:
acquiring condenser load parameters, and when the condenser load parameters are smaller than a first load threshold value, triggering a starting signal to start a compressor;
acquiring load parameters of a condenser, the exhaust temperature of a compressor and/or the running current of the compressor;
according to the condenser load parameter, if the condenser load is smaller than a first load threshold and larger than a second load threshold, triggering a quick unloading signal, starting a quick unloading flow path at the downstream of the condenser according to the quick unloading signal, inputting a refrigerant in the condenser into a compressor cooling device, and carrying out quick unloading of the load and cooling of the compressor;
converting the temperature of the exhaust gas of the compressor and the running current of the compressor into a compressor load parameter; judging a threshold value according to the load parameter of the compressor, determining that the load state of the compressor is in a safety range, a transition range or a danger range, and triggering a state signal corresponding to the safety range, the transition range or the danger range of the compressor;
and starting a cooling flow path at the downstream of the condenser according to the state signal of the transition range or the danger range of the compressor, and inputting a refrigerant into a compressor cooling device to cool the compressor.
The first load threshold may be set to be the condenser pressure PCondensation The maximum pressure P of the system is less than the maximum pressure P of the refrigerant system in the air conditionerHigh pressureAnd when the system is in an overload state, the compressor is controlled to be started, otherwise, the compressor can be controlled to be stopped, and the alarm module is controlled to give an alarm according to the overload state parameters of the system.
The second load threshold value is set to the pressure P in the condenserCondensation And PHigh pressureSatisfies the relationship: b PHigh pressureCondensation of < P > is less than or equal to a PHigh pressureAnd triggering a quick unloading signal, starting a quick unloading flow path at the downstream of the condenser according to the quick unloading signal, inputting the refrigerant in the condenser into a compressor cooling device, and performing quick unloading of load and compressor cooling so as to enable a compressor system to be in an effective working state, wherein example parameters are a and b are 0.9 and 0.8, the example parameters are mainly related to the system configuration and model of the compressor, a first load threshold and a second load threshold of the refrigerant of the system can be obtained according to actual conditions, and specific parameters of the refrigerant of the system are adjusted, and the range of the thresholds is not specifically limited in the application.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
acquiring an overload parameter threshold value of a compressor in an overload working state, and if the exhaust temperature of the compressor is larger than or equal to the overload parameter threshold value range;
and/or;
the compressor running current is greater than or equal to the overload parameter threshold range;
outputting a state signal that the load of the compressor is in an overload working state;
and closing the compressor according to the state signal that the load of the compressor is in the overload working state.
Discharge temperature T of the compressorExhaust of gasesThe running current of the compressor is ICompressorAnd obtaining the pressure P in the condenserCondensation When T is judged by the controller of the unitExhaust of gases≥-k1ICompressor+ C1, example parameters: k1 ═ 2, C1 ═ 120, or PCondensation ≥PHigh pressureExample parameters for the R410A refrigerant System, PHigh pressure4.2Pa, the set compressor is kept closed when the high pressure set values of different refrigerant systems are different, wherein the k and C valuesIn relation to the compressor system configuration, the coefficients are not consistent from compressor to compressor and from system configuration to system configuration.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and on the premise that the load parameter of the condenser is smaller than the second load threshold, acquiring a dangerous parameter threshold of the compressor in a dangerous range working state, and starting a quick unloading mode of the cooling flow path to quickly cool the compressor when the exhaust temperature and the running current of the compressor are within the dangerous parameter threshold range. According to the system judgment, at PCondensation ≤bPHigh pressureOn the premise, the danger parameter threshold value can be set as follows: -k1ICompressor+C1＞TExhaust of gases≥-k2ICompressor+C2And starting the compressor cooling device, and cooling the compressor through the quick unloading mode of the cooling flow path.
Acquiring T once every T time interval within a set interval time, for example, T is 5sExhaust of gases、ICompressor、PCondensation The value of the load parameter is judged by the internal controller of the unit, if-k1ICompressor+C1＞TExhaust of gases≥-k2ICompressor+C2Example parameters: k is a radical of1＝2，C1＝120，k2＝3，C2110, and PCondensation ≤bPHigh pressureWhen the temperature of the compressor is higher than the set temperature, the compressor is in a high-pressure state, the compressor is in an overload state, the temperature of the shell of the compressor needs to be rapidly reduced, the first electromagnetic valve is closed, the second electromagnetic valve is opened, a low-temperature refrigerant formed by the first throttling piece is throttled for the second time by the second throttling piece, a refrigerant with a lower temperature is formed, and the temperature of the compressor can be rapidly reduced.
The superheated gaseous refrigerant discharged from the compressor enters the condenser, is condensed into high-temperature liquid refrigerant to flow out after entering the condenser, and is changed into low-temperature gas-liquid two-phase refrigerant after passing through the first throttling element, and the refrigerant is divided into two paths at the moment: one path of refrigerant enters an evaporator and absorbs heat to become gaseous refrigerant;
the other path of refrigerant passes through a second throttling element and then is changed into a gas-liquid two-phase refrigerant with lower temperature, enters a compressor cooling device, absorbs the heat of a compressor cylinder body, quickly reduces the temperature of the compressor and simultaneously is changed into a gaseous refrigerant;
the two paths of refrigerants are mixed at the first node, then are sucked and compressed by the compressor, and are circulated in a reciprocating mode.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
obtaining a transition range parameter threshold value of the compressor in the transition range working state, wherein the transition range parameter threshold value of the compressor in the transition range working state can meet the following requirements: -k2ICompressor+C2＞TExhaust of gases≥-k3ICompressor+C3Example parameters: k is a radical of2＝3，C2＝110，k3＝4，C395, and PCondensation ≤bPHigh pressureAnd starting a transitional unloading mode of the cooling flow path to perform moderate cooling on the compressor when the exhaust temperature and the running current of the compressor are within the range of the transitional range parameter threshold.
Acquiring T once every T time interval within a set interval time, for example, T is 5sExhaust of gases、ICompressor、PCondensation And the load parameter value is judged by the machine set controller, and if the compressor is in the transition range parameter threshold value of the transition range working state, the transition range parameter threshold value of the compressor meets the following conditions: -k2ICompressor+C2＞TExhaust of gases≥-k3ICompressor+C3And P isCondensation ≤bPHigh pressureWhen the example parameter, b is 0.8, the refrigerant system high pressure P isHigh pressureThe temperature of the shell of the compressor needs to be reduced when the compressor is in a transient overload state, the second electromagnetic valve is opened, and the first electromagnetic valve keeps the current state, namely the first electromagnetic valve is in an open state and maintains the open state, and if the first electromagnetic valve is in a closed state, the first electromagnetic valve maintains the closed state.
And the second electromagnetic valve is opened, the first electromagnetic valve is closed, and the refrigerant is mainly used for cooling the compressor to avoid overloading the compressor.
If the second electromagnetic valve is opened, the first electromagnetic valve is opened, and the refrigerant simultaneously reduces the high pressure P of the refrigerant systemHigh pressureThe refrigerant cooling flow path is in a fast unloading mode, the cooling compressor is cooled fast, and high pressure of a refrigerant system and overload of the compressor are avoided.
According to an embodiment of the present application, wherein the compressor load parameter is converted according to a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and when the exhaust temperature and the running current of the compressor are within the range of the safety parameter threshold, starting a safety unloading mode of the cooling flow path to maintain the load of the compressor within the safety range.
Acquiring T once every T time interval within a set interval time, for example, T is 5sExhaust of gases、ICompressor、PCondensation And the load parameter value is judged by the machine set controller, and if the compressor is in the safety parameter threshold value of the working state of the safety range: t isExhaust of gases＜-k3ICompressor+C3Example parameters: k is a radical of3＝4，C395, and PCondensation ≤bPHigh pressureWhile, example referenceIf b is 0.8, the system high pressure is below the high pressure state, the compressor is in a safe state, the second electromagnetic valve is closed without rapidly cooling the compressor, but the first electromagnetic valve keeps the current state, namely if the first electromagnetic valve is opened, the first electromagnetic valve is kept in the opened state, and if the first electromagnetic valve is closed, the first electromagnetic valve is kept in the closed state;
if the first electromagnetic valve is opened, the refrigerant is mainly used for reducing the pressure of the refrigerant system, and the refrigerant system pressure overload and the compressor overload are avoided.
If the first electromagnetic valve is closed, at this time, because the second electromagnetic valve is also closed, no refrigerant flows through the cooling flow path, that is, the cooling device of the compressor is in a non-starting state, and the refrigerant of the condenser is mainly used for heat exchange in the second refrigerant circulation pipeline between the evaporator and the compressor.
According to an embodiment of the present application, wherein initiating a safe unloading mode of the cooling circuit to maintain the compressor load within a safe range when the compressor load parameter is within the safe range parameter threshold comprises:
and acquiring a safety threshold range of the load parameter of the refrigerant system, and closing the cooling flow path when the pressure of the condenser is in the safety threshold range.
Acquiring T once every T time interval within a set interval time, for example, T is 5sExhaust of gases、ICompressor、PCondensation The value of the load parameter is judged by the internal controller of the unit, if-k2ICompressor+C2＞TExhaust of gasesExample parameters: k is a radical of2＝3，C2110 and the safety threshold value of the load parameter of the refrigerant system is PCondensation ≤cPHigh pressureWhen the safety threshold value of (1) is within the range, c is 0.7, the pressure in the refrigerant system and the state of the compressor are both within the safety range, the first electromagnetic valve is closed, the second electromagnetic valve is closed, and the cooling flow path is closed at the moment, namely, no refrigerant flows through the cooling flow path.
According to another aspect of the present application, there is provided a compressor control system including the compressor protection method.
According to another aspect of the present application, there is provided a compressor including the compressor control system.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (14)

1. An air conditioner is characterized by comprising a compressor, a heat exchange device, a condenser and a flow control element;
the heat exchange device comprises a first refrigerant circulating pipeline and a second refrigerant circulating pipeline, and the first refrigerant circulating pipeline wraps the shell of the compressor;
the compressor is connected with the condenser through the second refrigerant circulating pipeline;
the flow control element is arranged between the condenser and the heat exchange device so as to control the heat exchange quantity of the refrigerant in the first refrigerant circulating pipeline and the compressor through the flow control element.
2. The air conditioner according to claim 1, further comprising a pressure monitoring device provided to the condenser to detect an operating pressure value of the condenser; and/or the like, and/or,
the temperature monitoring device is arranged outside the outlet end of the compressor so as to detect the outlet end temperature of the compressor; and/or the like, and/or,
the current detection device is in signal connection with a driving circuit of the compressor and is used for detecting the running current of the compressor;
thereby acquiring the working state of the compressor and/or the working state of the condenser so as to control the opening or closing of the flow control element.
3. The air conditioner of claim 1, further comprising an evaporator, wherein the flow control member comprises a throttle adjustment member, wherein the throttle adjustment member comprises a first throttle member and a second throttle member, wherein the first throttle member is connected between the condenser and the evaporator, and the second throttle member is disposed between the condenser and the heat exchange device.
4. The air conditioner according to claim 3, further comprising a current detecting device, wherein the current detecting device is connected with a driving circuit signal of the compressor and is used for detecting the running current of the compressor so as to obtain the working state of the compressor and control the opening or closing of the flow control member;
and/or;
and the circuit is in signal connection with the whole air conditioner circuit and is used for detecting the running current of the whole air conditioner so as to obtain the working state of the whole air conditioner and control the opening or closing of the flow control piece.
5. The air conditioner according to claim 4, wherein the control valve includes a first solenoid valve and a second solenoid valve, an inlet end of the first solenoid valve is connected to an outlet end of the condenser, an inlet end of the second solenoid valve is connected to an outlet end of the first throttle member, and both the outlet end of the first solenoid valve and the outlet end of the second solenoid valve are connected to an inlet end of the second throttle member.
6. The air conditioner as claimed in claim 3, comprising a first node, wherein the discharge pipe of the evaporator and the discharge port of the first refrigerant circulation pipe are connected to the first node, and the first node is communicated with the suction port of the compressor.
7. A method of protecting a compressor, comprising:
acquiring condenser load parameters, and when the condenser load parameters are smaller than a first load threshold value, triggering a starting signal to start a compressor;
acquiring load parameters of a condenser, the exhaust temperature of a compressor and/or the running current of the compressor;
according to the condenser load parameter, if the condenser load is smaller than a first load threshold and larger than a second load threshold, triggering a quick unloading signal, starting a quick unloading flow path at the downstream of the condenser according to the quick unloading signal, inputting a refrigerant in the condenser into a compressor cooling device, and carrying out quick unloading of the load and cooling of the compressor;
converting the temperature of the exhaust gas of the compressor and the running current of the compressor into a compressor load parameter; judging a threshold value according to the load parameter of the compressor, determining that the load state of the compressor is in a safety range, a transition range or a danger range, and triggering a state signal corresponding to the safety range, the transition range or the danger range of the compressor;
and starting a cooling flow path at the downstream of the condenser according to the state signal of the transition range or the danger range of the compressor, and inputting a refrigerant into a compressor cooling device to cool the compressor.
8. The compressor protection method as claimed in claim 7, wherein the conversion into the compressor load parameter is performed based on a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
acquiring an overload parameter threshold value of a compressor in an overload working state, and if the exhaust temperature of the compressor is larger than or equal to the overload parameter threshold value range;
and/or;
the compressor running current is greater than or equal to the overload parameter threshold range;
outputting a state signal that the load of the compressor is in an overload working state;
and closing the compressor according to the state signal that the load of the compressor is in the overload working state.
9. The compressor protection method as claimed in claim 7, wherein the conversion into the compressor load parameter is performed based on a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and on the premise that the load parameter of the condenser is smaller than the second load threshold, acquiring a dangerous parameter threshold of the compressor in a dangerous range working state, and starting a quick unloading mode of the cooling flow path to quickly cool the compressor when the load parameter of the compressor is within the dangerous range parameter threshold range.
10. The compressor protection method as claimed in claim 7, wherein the conversion into the compressor load parameter is performed based on a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and when the load parameter of the compressor is in the range of the parameter threshold value of the transition range, starting a transition unloading mode of the cooling flow path to carry out moderate cooling on the compressor.
11. The compressor protection method as claimed in claim 7, wherein the conversion into the compressor load parameter is performed based on a discharge temperature of the compressor and an operation current of the compressor; according to the compressor load parameter judgment threshold, determining that the compressor load state is in a safety range, a transition range or a dangerous range, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the state signal comprises the following steps:
and acquiring a safety parameter threshold value of the compressor in a safety range working state, and starting a safety unloading mode of the cooling flow path when the load parameter of the compressor is within the safety range threshold value range so as to maintain the load of the compressor in a safety range.
12. The method of protecting a compressor of claim 11, wherein initiating a safe unloading mode of the cooling circuit to maintain a compressor load within a safe range when a discharge temperature and an operating current of the compressor are within safe parameter threshold ranges comprises:
and acquiring a safety threshold range of the load parameter of the refrigerant system, and closing the cooling flow path when the load parameter of the condenser is in the safety threshold range.
13. A compressor control system, characterized by comprising a compressor protection method according to any one of claims 7 to 12.
14. A compressor comprising the compressor control system of claim 13.
CN202111006269.7A 2021-08-30 2021-08-30 Air conditioner, compressor protection method, compressor control system and compressor Pending CN113776236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111006269.7A CN113776236A (en) 2021-08-30 2021-08-30 Air conditioner, compressor protection method, compressor control system and compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111006269.7A CN113776236A (en) 2021-08-30 2021-08-30 Air conditioner, compressor protection method, compressor control system and compressor

Publications (1)

Publication Number Publication Date
CN113776236A true CN113776236A (en) 2021-12-10

Family

ID=78840209

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111006269.7A Pending CN113776236A (en) 2021-08-30 2021-08-30 Air conditioner, compressor protection method, compressor control system and compressor

Country Status (1)

Country Link
CN (1) CN113776236A (en)

Similar Documents

Publication Publication Date Title
US8353173B2 (en) Refrigerating cycle apparatus and operation control method therefor
US20080302118A1 (en) Heat Pump Water Heating System Using Variable Speed Compressor
CN110486917B (en) Operation control device and method, air conditioner and computer readable storage medium
KR101550573B1 (en) Refrigeration device
CN106931545B (en) Heat pump enthalpy-spraying system, control method thereof and air conditioner
CN109612141B (en) Refrigerating unit and control method and control device thereof
CN110319630A (en) A kind of spraying control method thereof, control system and air conditioner
KR101570644B1 (en) Refrigeration device
CN106642790A (en) Air-conditioning system and control method
JP2020104591A (en) Vehicular air conditioner
CN215809460U (en) Air conditioner
JP5505540B2 (en) Air conditioner
CN113776236A (en) Air conditioner, compressor protection method, compressor control system and compressor
WO2017135223A1 (en) Vehicle air conditioning device, vehicle provided with same, and method for controlling vehicle grill device
CN106705496A (en) Micro-channel air conditioner and control method thereof
CN110686423A (en) Air conditioning unit with compressor cooling branch and compressor cooling control method
CN103175355B (en) Air-conditioner and be applied to the control method of delivery temperature of air-conditioner
WO2017185514A1 (en) Cooling and heating air conditioner, cooling-only air conditioner, and control method for air conditioner
CN115264654A (en) Air conditioner and overload control method thereof
WO2017185517A1 (en) Cooling and heating air conditioner, cooling-only air conditioner, and control method for air conditioner
US20220252317A1 (en) A heat pump
CN112277988A (en) Air conditioning unit for railway vehicle and control method
CN206291522U (en) A kind of microchannel air-conditioner
KR100696712B1 (en) System and method for protecting compressor of multi air-conditioner
WO2017185513A1 (en) Cooling-heating type air conditioner, cooling-only type air conditioner, control method for air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination