CN113776236B - Air conditioner, compressor protection method, compressor control system and compressor - Google Patents
Air conditioner, compressor protection method, compressor control system and compressor Download PDFInfo
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- CN113776236B CN113776236B CN202111006269.7A CN202111006269A CN113776236B CN 113776236 B CN113776236 B CN 113776236B CN 202111006269 A CN202111006269 A CN 202111006269A CN 113776236 B CN113776236 B CN 113776236B
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- 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
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (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 a compressor, a heat exchange device, a condenser and a flow control member; the heat exchange device comprises a first refrigerant circulation pipeline and a second refrigerant circulation pipeline, and the first refrigerant circulation pipeline is wrapped on the compressor shell; 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 the heat exchange quantity of the refrigerant in the first refrigerant circulating pipeline and the compressor is controlled through the flow control piece. The outside at the compressor casing sets up first refrigerant circulation pipeline, is used for the heat dissipation to compressor self system with condenser exhaust refrigerant part to make the compressor be in rated work efficiency, in addition through the heat transfer volume of refrigerant and compressor in the first refrigerant circulation pipeline of flow control spare, in order to adapt to different service environment, carries out quick high-efficient cooling to the compressor.
Description
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 is warmed, the average ambient temperature continuously rises throughout the year, high-temperature working conditions in summer frequently occur, the ambient temperature in partial areas is up to 52 ℃, and the running ambient temperature of an air conditioner can reach 58 ℃ under the consideration of the condition of direct solar radiation in the noon in summer. The reliability of the unit is particularly important under the high-temperature working condition, the problem that the reliability of the air conditioner is affected due to the fact that the system is high in pressure, the compressor is overloaded 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 running 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 aim of the application, the application adopts the following technical scheme:
according to one aspect of the present application, there is provided an air conditioner including a compressor, a heat exchange 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 in the compressor shell;
the compressor is communicated with the condenser through the second refrigerant circulating pipeline;
The flow control piece is arranged between the condenser and the heat exchange device, so that the heat exchange quantity of the refrigerant in the first refrigerant circulating pipeline and the heat exchange quantity of the compressor are controlled through the flow control piece.
According to an embodiment of the present application, the system further comprises a pressure monitoring device, which is disposed on the condenser, so as to detect an operation pressure value of the condenser; and/or
The temperature monitoring device is arranged outside the outlet end of the compressor to detect the temperature of the outlet end of the compressor; and/or
The device also comprises a current detection device, a control device and a control device, wherein the current detection device is used for detecting the running current of the compressor and acquiring the working state of the compressor so as to control the opening or closing of the flow control element;
and/or;
The air conditioner control device is connected with an air conditioner complete machine circuit signal and is used for detecting the running current of the air conditioner complete machine so as to acquire the working state of the air conditioner complete machine and control the opening or closing of the flow control piece.
According to an embodiment of the present application, the evaporator further includes a flow control member, and the flow control member includes a throttle adjusting member, and the throttle adjusting member includes a first throttle member and a second throttle member, and 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.
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 throttle adjusting member, so as to adjust the refrigerant switch in the first refrigerant circulation pipe through the control valve.
According to an embodiment of the present application, 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 throttling element, and an outlet end of the first solenoid valve and an outlet end of the second solenoid valve are both connected to an inlet end of the second throttling element.
According to one embodiment of the present application, the evaporator comprises a first node, wherein the exhaust pipe of the evaporator and the liquid outlet of the first refrigerant circulation pipe are connected to the first node, and the first node is communicated with the air suction port of the compressor.
According to another aspect of the present application, there is provided a compressor protection method including:
Acquiring a condenser load parameter, triggering a starting signal when the condenser load parameter is smaller than a first load threshold value, and starting a compressor;
acquiring a condenser load parameter, an exhaust temperature of the compressor and/or an operating current of the compressor;
Triggering a rapid unloading signal according to the load parameter of the condenser if the load of the condenser is smaller than a first load threshold and larger than a second load threshold, starting a rapid unloading flow path at the downstream of the condenser according to the rapid unloading signal, and inputting cooling in the condenser into a compressor cooling device for rapid unloading of the load and cooling of the compressor;
Converting the exhaust temperature of the compressor and the running current of the compressor into a compressor load parameter; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor;
and starting a cooling flow path at the downstream of the condenser according to a state signal of the transition range or the dangerous range of the compressor, and inputting a refrigerant into a compressor cooling device to cool the compressor.
According to an embodiment of the application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
Acquiring an overload parameter threshold value of the compressor in an overload working state, if the exhaust temperature of the compressor is greater than or equal to the overload parameter threshold value range;
and/or;
The compressor operating current is greater than or equal to the overload parameter threshold range;
Outputting a state signal that the compressor load 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 application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method 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 working state of the compressor in a dangerous range, and starting a rapid unloading mode of the cooling flow path to rapidly cool the compressor when the exhaust temperature and the running current of the compressor are in the dangerous parameter threshold range.
According to an embodiment of the application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
and acquiring a transition range parameter threshold value of the compressor in a transition range working state, and starting a transition unloading mode of the cooling flow path to moderately cool the compressor when the exhaust temperature and the running current of the compressor are in the transition range parameter threshold value range.
According to an embodiment of the application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
And acquiring a safety parameter threshold value of the compressor in a working state of a safety range, and starting a safety unloading mode of the cooling flow path when the exhaust temperature and the running current of the compressor are in the safety parameter threshold value range so as to maintain the load of the compressor in the safety range.
According to an embodiment of the present application, wherein when the discharge temperature and the operation current of the compressor are within the safe parameter threshold range, a safe unloading mode of the cooling flow path is started to maintain the load of the compressor within the safe range, 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:
Through set up first refrigerant circulation pipeline in the outside of compressor housing, can be used to the heat dissipation of compressor self system with the exhaust refrigerant of condenser, and then can make the compressor be in rated work efficiency, simultaneously through the heat transfer volume of refrigerant and compressor in the first refrigerant circulation pipeline of flow control spare to make the compressor adapt to different service environment, carry out quick high-efficient cooling to the compressor, further improve the convenience of the whole in the use of air conditioner.
According to the method for protecting the compressor, the cooling flow paths are switched in a coupling control mode according to the exhaust temperature of the compressor, the compressor current and the condenser pressure, and then the cooling device of the compressor is switched to cool the compressor in different modes, so that the reliability of the system for protecting the compression 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 invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of an internal system connection principle of an embodiment of an air conditioner according to an embodiment of the present application;
fig. 2 is a schematic diagram of an internal system connection principle of another embodiment of an air conditioner according to an embodiment of the present application;
fig. 3 is a schematic diagram of an internal system connection principle of another embodiment of an air conditioner according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a compressor overload curve in a method for protecting a compressor according to an embodiment of the present application;
FIG. 5 is a schematic flow chart of an embodiment of a method for protecting a compressor according to an embodiment of the present application;
FIG. 6 is a schematic flow chart of another embodiment of a method for protecting a compressor according to an embodiment of the present application;
fig. 7 is a schematic flow chart of another embodiment of a protection method for a compressor according to an embodiment of the present application.
1, A compressor; 2. a condenser; 3. an evaporator; 4. a first throttle member; 5. a second throttle member; 6. a first electromagnetic valve; 7. a second electromagnetic 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
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Under the conditions of high-temperature working conditions in summer or dirty blockage of an outdoor unit, high-pressure protection of a system or overload protection of the compressor 1 is easy to occur under the refrigerating working conditions of the unit, so that an air conditioner stops working and cannot cool the indoor space, and the comfort is affected. According to one aspect of the present application, there is provided an air conditioner comprising a compressor 1, a heat exchange device, a condenser 2 and a flow control member;
The heat exchange device comprises a first refrigerant circulation pipeline 100 and a second refrigerant circulation pipeline 200, and the first refrigerant circulation pipeline 100 is wrapped in a shell of the compressor 1;
the compressor is communicated with the condenser 2 through the second refrigerant circulation pipeline 200;
The flow control member is disposed between the condenser 2 and the heat exchange device, so as to control the heat exchange amount of the refrigerant in the first refrigerant circulation pipe 100 and the compressor 1 through the flow control member.
Through the first refrigerant circulation pipeline 100 that encircles in the outside of compressor 1 casing, the refrigerant of condenser 2 exit end is used for dispelling the heat for compressor 1 through the flow control, and then makes the inside system of air conditioner realize self-interacting to compressor 1 self temperature, improves the reliability that the air conditioner used.
In order to improve the detection effect, according to an embodiment of the present application, the device further comprises a pressure monitoring device 9, which is disposed on the condenser 2, to detect the operation pressure value of the condenser 2; and/or
The temperature monitoring device 10 is arranged outside the outlet end of the compressor 1 to detect the temperature of the outlet end of the compressor 1; and/or
The device also 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 acquire the working state of the compressor 1 and control the opening or closing of the flow control;
and/or;
The air conditioner control device is connected with an air conditioner complete machine circuit signal and is used for detecting the running current of the air conditioner complete machine so as to acquire the working state of the air conditioner complete machine and control the opening or closing of the flow control piece.
Referring to fig. 1-4, by detecting the temperature and/or the running current of the air-conditioning compression outlet end, the opening and closing degree of the flow control member, or the opening and closing state, is controlled, 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 pipe 100 is wrapped around the shell of the compressor 1 and may be configured as a spiral pipe, or encircle the shell structure of the compressor 1, and the heat exchange ratio of the first refrigerant circulation pipe 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 present application, the evaporator 3 is further included, the flow control member includes a throttle adjusting member, a second refrigerant circulation pipe 200 is disposed between the evaporator and the throttle adjusting member, the throttle adjusting member includes a first throttle member 4 and a second throttle member 5, the first throttle member 4 is connected between the condenser 2 and the evaporator 3, and the second throttle member 5 is disposed between the condenser 2 and the heat exchange 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 with the outlet end of the condenser 2, so that the outlet end of the first throttling element 4 is connected with the inlet end of the evaporator 3, and the outlet end of the second throttling element 5 is connected with the inlet end of the first refrigerant circulation pipeline 100, so that the heat exchange amount at the evaporator 3 is adjusted through the first throttling element 4, and the heat exchange ratio between the compressor 1 and the evaporator 3 is comprehensively adjusted through the first throttling element 4 and the second throttling element 5, so that the heat exchange efficiency of the whole air conditioning system is improved by the condenser 2.
If the service temperature of the environment is higher, the inlet end of the second throttling element 5 may be connected with 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 shell of the compressor 1.
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 2 and the throttling regulator, so as to adjust the refrigerant switch in the first refrigerant circulation pipe 100 through the control valve.
The control valve may be configured as an electromagnetic valve to switch and adjust the refrigerant flow in the first refrigerant circulation pipe 100, so as to start or close the first refrigerant circulation pipe 100, thereby improving the convenience of use.
Preferably, the control valve comprises a first electromagnetic valve 6 and a second electromagnetic valve 7, wherein the inlet end of the first electromagnetic valve 6 is connected with the outlet end of the condenser 2, the inlet end of the second electromagnetic valve 7 is connected with the outlet end of the first throttling element 4, and the outlet ends of the first electromagnetic valve 6 and the second electromagnetic valve 7 are both connected with the inlet end of the second throttling element 5.
The overheated gaseous refrigerant discharged by the compressor 1 enters the condenser 2, and is condensed into high-temperature liquid refrigerant after entering the condenser 2, and the refrigerant flows out in two paths at the moment: after flowing through the first throttling element 4, the refrigerant is changed into a low-temperature gas-liquid two-phase refrigerant, and after entering the evaporator 3 through the second cooling circulation pipeline 200, the refrigerant absorbs heat and is changed into a gaseous refrigerant;
The other path of refrigerant is bypassed through the first electromagnetic valve 6, so that the system is reduced in high pressure, the refrigerant can be changed into low-temperature gas-liquid two-phase refrigerant after passing through the second throttling element 5, the refrigerant enters the heat exchange device through the first refrigerant circulating pipeline 100, the refrigerant becomes a gaseous refrigerant after absorbing the heat of the cylinder body of the compressor 1, and meanwhile, the temperature of the cylinder body of the compressor 1 is reduced.
Preferably, the two paths of refrigerants are mixed and then sucked, compressed and discharged by the compressor 1, and the two paths of refrigerants are reciprocally circulated in the whole air conditioning system. As an example, the evaporator comprises a first node 8, the exhaust pipe of the evaporator 3 and the liquid outlet of the first refrigerant circulation pipe are connected to the first node 8, and the first node 8 is communicated with the air suction port of the compressor 1.
And then need not to add outside heat exchanger and additionally carry out the heat transfer to compressor 1, can realize the protection to the inside system of air conditioner, reduce the cost, improve the convenience of use, reduce the assembly space in the air conditioner.
A fan 300 is further provided at one side of the evaporator 3 and/or the condenser 2 for improving 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, comprising:
Acquiring a condenser load parameter, triggering a starting signal when the condenser load parameter is smaller than a first load threshold value, and starting a compressor;
acquiring a condenser load parameter, an exhaust temperature of the compressor and/or an operating current of the compressor;
Triggering a rapid unloading signal according to the load parameter of the condenser if the load of the condenser is smaller than a first load threshold and larger than a second load threshold, starting a rapid unloading flow path at the downstream of the condenser according to the rapid unloading signal, and inputting cooling in the condenser into a compressor cooling device for rapid unloading of the load and cooling of the compressor;
Converting the exhaust temperature of the compressor and the running current of the compressor into a compressor load parameter; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, and triggering a state signal corresponding to the safety range, the transition range or the dangerous 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 dangerous 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 that when the pressure P Condensation of the condenser is smaller than the maximum pressure P High pressure of the system that can be carried by the refrigerant system in the air conditioner, the compressor is controlled to be turned on, otherwise, the compressor is controlled to be turned off, and the alarm module is controlled to alarm according to the overload state parameter of the system.
The second load threshold housing is set such that pressures P Condensation and P High pressure within the condenser satisfy the relationship: and if b P High pressure is less than P and condensation is less than or equal to a P High pressure , triggering a rapid unloading signal, starting a rapid unloading flow path at the downstream of the condenser according to the rapid unloading signal, inputting cooling in the condenser into a compressor cooling device for rapid unloading of load and cooling of the compressor so as to enable a compressor system to be in an effective working state, wherein an example parameter, a=0.9 and b=0.8, the example parameter mainly relates to the system configuration and model of the compressor, a first load threshold value and a second load threshold value of a refrigerant of the system can be obtained according to actual conditions, and specific parameters of the system are adjusted.
According to an embodiment of the application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
Acquiring an overload parameter threshold value of the compressor in an overload working state, and if the exhaust temperature of the compressor is greater than or equal to the overload parameter threshold value range;
and/or;
The compressor operating current is greater than or equal to the overload parameter threshold range;
Outputting a state signal that the compressor load 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.
The exhaust temperature T Exhaust gas of the compressor, the running current of the compressor is I compressor with a compressor body having a rotor with a rotor shaft , and the pressure P Condensation in the condenser is obtained, and is judged by the inside of the unit controller, when T Exhaust gas ≥-k1I compressor with a compressor body having a rotor with a rotor shaft +c1, the example parameters are as follows: k1 For example parameters of R410A refrigerant system, P High pressure = 4.2Pa, different refrigerant system high pressure set points are different, and the unit compressors are kept off, wherein the k and C values are related to the compressor system configuration, the different compressors and the different system configurations, and the coefficients are inconsistent.
According to an embodiment of the application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method 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 working state of the compressor in a dangerous range, and starting a rapid unloading mode of the cooling flow path to rapidly cool the compressor when the exhaust temperature and the running current of the compressor are in the dangerous parameter threshold range. According to the system judgment, on the premise of P Condensation ≤bP High pressure , the dangerous parameter threshold value can be set as follows: -k 1I compressor with a compressor body having a rotor with a rotor shaft +C1＞T Exhaust gas ≥-k2I compressor with a compressor body having a rotor with a rotor shaft +C2, activating the compressor cooling device and cooling the compressor by a fast unloading mode of the cooling flow path.
In a set interval time, for example, t=5s, T Exhaust gas 、I compressor with a compressor body having a rotor with a rotor shaft 、P Condensation load parameter values are obtained once at intervals of T, and if-k 1I compressor with a compressor body having a rotor with a rotor shaft +C1＞T Exhaust gas ≥-k2I compressor with a compressor body having a rotor with a rotor shaft +C2, the example parameters are determined by the inside of the unit controller: k 1＝2,C1＝120,k2＝3,C2 =110, and when P Condensation ≤bP High pressure , the example parameter, b=0.8, is that the system high pressure is below the state of about to high pressure, but the compressor is in about to overload state, need to carry out quick cooling to the compressor shell body temperature, close first solenoid valve at this moment, open the second solenoid valve, the low temperature refrigerant that forms through first throttling piece, after the second throttling piece throttles, forms the refrigerant that the temperature is lower, can reduce the compressor temperature fast.
The superheated gaseous refrigerant discharged by the compressor enters the condenser, is condensed into high-temperature liquid refrigerant after entering the condenser, flows out, and becomes low-temperature gas-liquid two-phase refrigerant after passing through the first throttling piece, and at the moment, the refrigerant is divided into two paths: one path of refrigerant enters the evaporator and absorbs heat to become a gaseous refrigerant;
The other path of refrigerant is changed into a gas-liquid two-phase refrigerant with lower temperature after passing through the second throttling piece, and enters a compressor cooling device, and after absorbing the heat of the compressor cylinder body, the temperature of the compressor is quickly reduced, and meanwhile, the refrigerant is changed into a gaseous refrigerant;
The two paths of refrigerants are sucked and compressed by the compressor after being mixed at the first node, and the two paths of refrigerants are circulated in a reciprocating way.
According to an embodiment of the application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
The transition range parameter threshold value of the compressor in the transition range working state is obtained, so that the transition range parameter threshold value of the compressor in the transition range working state can be satisfied: -k 2I compressor with a compressor body having a rotor with a rotor shaft +C2＞T Exhaust gas ≥-k3I compressor with a compressor body having a rotor with a rotor shaft +C3, example parameters: k 2＝3,C2＝110,k3＝4,C3 = 95, and P Condensation ≤bP High pressure , when the discharge temperature and the running current of the compressor are within the transition range parameter threshold range, starting a transition unloading mode of the cooling flow path, and performing moderate cooling on the compressor.
And in the set interval time, if t=5s, acquiring a T Exhaust gas 、I compressor with a compressor body having a rotor with a rotor shaft 、P Condensation load parameter value once at intervals of T, and judging by the inside of a unit controller, if the compressor is in a transition range parameter threshold of a transition range working state, wherein the transition range parameter threshold of the compressor meets the following conditions: k 2I compressor with a compressor body having a rotor with a rotor shaft +C2＞T Exhaust gas ≥-k3I compressor with a compressor body having a rotor with a rotor shaft +C3, and P Condensation ≤bP High pressure , b=0.8, the refrigerant system high pressure P High pressure is below the high pressure state, and the compressor is in the transitional overload state, the compressor shell temperature needs to be reduced, the second solenoid valve is opened, the first solenoid valve keeps the current state, i.e. if the first solenoid valve is in the open state, the first solenoid valve keeps the open state, and if the first solenoid valve is in the closed state, the first solenoid valve keeps 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 and avoiding overload of the compressor.
If the second electromagnetic valve is opened, the first electromagnetic valve is opened, the pressure of the high pressure P High pressure of the refrigerant system is reduced simultaneously by the refrigerant, the opposite cooling flow path is in a rapid unloading mode, the cooling compressor is rapidly cooled, and the high pressure of the refrigerant system and the overload of the compressor are avoided.
According to an embodiment of the application, the compressor load parameter is converted according to the exhaust temperature of the compressor and the running current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
And acquiring a safety parameter threshold value of the compressor in a working state of a safety range, and starting a safety unloading mode of the cooling flow path when the exhaust temperature and the running current of the compressor are in the safety parameter threshold value range so as to maintain the load of the compressor in the safety range.
In the set interval time, for example, t=5s, T Exhaust gas 、I compressor with a compressor body having a rotor with a rotor shaft 、P Condensation load parameter values are obtained once at intervals of T, and the internal judgment of the unit controller is performed, if the compressor is in the safety parameter threshold value of the working state of the safety range: t Exhaust gas ＜-k3I compressor with a compressor body having a rotor with a rotor shaft +C3, example parameters: k 3＝4,C3 =95, and when P Condensation ≤bP High pressure , the example parameter, b=0.8, the system high pressure is below the state of about to high pressure, the compressor is in a safe state, at this time, no rapid cooling of the compressor is needed, the second solenoid valve is closed, but the first solenoid valve keeps the current state, i.e. if the first solenoid valve is opened, the state is maintained, if it is closed, the state is maintained;
If the first electromagnetic valve is opened, the refrigerant is mainly used for reducing the pressure of the refrigerant system, and the pressure overload of the refrigerant system and the overload of the compressor are avoided.
If the first solenoid valve is closed, the second solenoid valve is also closed, so that no refrigerant flows through the cooling flow path, that is, the compressor cooling device is in a non-started state, and the refrigerant of the condenser is mainly used for heat exchange in the second refrigerant circulating pipeline between the evaporator and the compressor.
According to an embodiment of the application, wherein the safe unloading mode of the cooling flow path is initiated to maintain the compressor load in a safe range when the compressor load parameter is within a safe range parameter threshold range, 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.
In a set interval time, for example, t=5s, T Exhaust gas 、I compressor with a compressor body having a rotor with a rotor shaft 、P Condensation load parameter values are obtained once at intervals of T, and if-k 2I compressor with a compressor body having a rotor with a rotor shaft +C2＞T Exhaust gas , the example parameters are determined by the inside of the unit controller: k 2＝3,C2 = 110, and the safety threshold of refrigerant system load parameter is in the safety threshold range of P Condensation ≤cP High pressure , example parameter, c = 0.7, pressure and the compressor state in the refrigerant system are all in safety range, close first solenoid valve, close the second solenoid valve, close the cooling flow path at this moment, and cooling flow path does not have the refrigerant circulation promptly.
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 should be noted that in this document, relational terms such as "first" and "second" and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the 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 (12)
1. An air conditioner is characterized by comprising a compressor, a heat exchange device, a condenser, an evaporator and a flow control member;
The heat exchange device comprises a first refrigerant circulation pipeline and a second refrigerant circulation pipeline, and the first refrigerant circulation pipeline wraps a shell of the compressor;
the compressor is connected with the condenser through the second refrigerant circulating pipeline;
The flow control piece 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 piece;
The flow control part comprises a throttling adjusting part and a control valve, the throttling adjusting part comprises a first throttling part and a second throttling part, the first throttling part is connected between the condenser and the evaporator, and the second throttling part is arranged on the first refrigerant circulating pipeline;
The control valve comprises a first electromagnetic valve and a second electromagnetic valve, wherein the inlet end of the first electromagnetic valve is connected with the outlet end of the condenser, the inlet end of the second electromagnetic valve is connected with the outlet end of the first throttling element, and the outlet end of the first electromagnetic valve and the outlet end of the second electromagnetic valve are both connected with the inlet end of the second throttling element.
2. The air conditioner of claim 1, further comprising a pressure monitoring device provided to the condenser to detect an operation pressure value of the condenser; and/or
The temperature monitoring device is arranged outside the outlet end of the compressor to detect the temperature of the outlet end of the compressor; and/or
The device also comprises a current detection device which is in signal connection with the driving circuit of the compressor and is used for detecting the running current of the compressor;
thereby, the working state of the compressor and/or the working state of the condenser is obtained to control the opening or closing of the flow control member.
3. The air conditioner of claim 1, further comprising a current detecting means, said current detecting means and said compressor driving circuit signal for detecting an operation current of said compressor, thereby obtaining an operation state of said compressor to control on or off of said flow control member;
and/or;
The air conditioner control device is connected with an air conditioner complete machine circuit signal and is used for detecting the running current of the air conditioner complete machine so as to acquire the working state of the air conditioner complete machine and control the opening or closing of the flow control piece.
4. The air conditioner as set forth in claim 1, including a first node to which both the discharge pipe of the evaporator and the discharge port of the first refrigerant circulation pipe are connected, the first node being in communication with the suction port of the compressor.
5. A compressor protection method applied to the air conditioner according to any one of claims 1 to 4, comprising:
Acquiring a condenser load parameter, triggering a starting signal when the condenser load parameter is smaller than a first load threshold value, and starting a compressor;
acquiring a condenser load parameter, an exhaust temperature of the compressor and/or an operating current of the compressor;
Triggering a rapid unloading signal according to the load parameter of the condenser if the load of the condenser is smaller than a first load threshold and larger than a second load threshold, starting a rapid unloading flow path at the downstream of the condenser according to the rapid unloading signal, and inputting cooling in the condenser into a compressor cooling device for rapid unloading of the load and cooling of the compressor;
Converting the exhaust temperature of the compressor and the running current of the compressor into a compressor load parameter; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, and triggering a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor;
and starting a cooling flow path at the downstream of the condenser according to a state signal of the transition range or the dangerous range of the compressor, and inputting a refrigerant into a compressor cooling device to cool the compressor.
6. The compressor protection method of claim 5, wherein the conversion into the compressor load parameter is based on a discharge temperature of the compressor and an operating current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
Acquiring an overload parameter threshold value of the compressor in an overload working state, and if the exhaust temperature of the compressor is greater than or equal to the overload parameter threshold value range;
and/or;
The compressor operating current is greater than or equal to the overload parameter threshold range;
Outputting a state signal that the compressor load 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.
7. The compressor protection method of claim 5, wherein the conversion into the compressor load parameter is based on a discharge temperature of the compressor and an operating current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method 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 working state of the compressor in a dangerous range, and when the load parameter of the compressor is in the dangerous range parameter threshold range, starting a rapid unloading mode of the cooling flow path to rapidly cool the compressor.
8. The compressor protection method of claim 5, wherein the conversion into the compressor load parameter is based on a discharge temperature of the compressor and an operating current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method comprises the following steps:
And acquiring a transition range parameter threshold value of the compressor in a transition range working state, and starting a transition unloading mode of the cooling flow path when the load parameter of the compressor is in the transition range parameter threshold value range, so as to moderately cool the compressor.
9. The compressor protection method of claim 5, wherein the conversion into the compressor load parameter is based on a discharge temperature of the compressor and an operating current of the compressor; determining that the load state of the compressor is in a safety range, a transition range or a dangerous range according to the judging threshold value of the load parameter of the compressor, so as to trigger a state signal corresponding to the safety range, the transition range or the dangerous range of the compressor, wherein the method 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 in the safety range threshold value range so as to maintain the load of the compressor in the safety range.
10. The compressor protection method of claim 9, wherein initiating a safe unloading mode of the cooling flow path to maintain the compressor load in a safe range when the compressor discharge temperature and the operating current 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.
11. A compressor control system comprising the compressor protection method of any one of claims 5-10.
12. A compressor comprising the compressor control system of claim 11.
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| KR100421390B1 (en) * | 2001-11-20 | 2004-03-09 | 엘지전자 주식회사 | Turbo compressor cooling structure |
| JP4363997B2 (en) * | 2004-01-27 | 2009-11-11 | 三洋電機株式会社 | Refrigeration equipment |
| US20150159919A1 (en) * | 2010-02-25 | 2015-06-11 | Mayekawa Mfg. Co., Ltd. | Heat pump unit |
| WO2015053939A1 (en) * | 2013-10-09 | 2015-04-16 | Johnson Controls Technology Company | Motor housing temperature control system |
| CN104896699B (en) * | 2015-06-11 | 2019-05-17 | 广东美的暖通设备有限公司 | Motor radiating structure, air conditioner and motor radiating method |
| CN104896700B (en) * | 2015-06-11 | 2018-12-28 | 广东美的暖通设备有限公司 | Auxiliary-radiating structure, air conditioner and auxiliary radiating method |
| CN109154455B (en) * | 2016-05-24 | 2021-06-11 | 三菱电机株式会社 | Refrigeration cycle device |
| KR102694362B1 (en) * | 2017-02-21 | 2024-08-12 | 한온시스템 주식회사 | Heat pump system for vehicle |
| CN109028486A (en) * | 2018-06-20 | 2018-12-18 | 广东美的暖通设备有限公司 | Refrigerant cooling device and its control method and air-conditioning system |
| CN208846795U (en) * | 2018-10-08 | 2019-05-10 | 珠海格力电器股份有限公司 | Refrigeration cycle system and air conditioner |
| CN212253242U (en) * | 2020-03-23 | 2020-12-29 | 青岛海尔空调器有限总公司 | Refrigerant system |
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