CN112361683A - Compressor starting protection device, control method and air-cooled water chilling unit - Google Patents
Compressor starting protection device, control method and air-cooled water chilling unit Download PDFInfo
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- CN112361683A CN112361683A CN202011352061.6A CN202011352061A CN112361683A CN 112361683 A CN112361683 A CN 112361683A CN 202011352061 A CN202011352061 A CN 202011352061A CN 112361683 A CN112361683 A CN 112361683A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 37
- 238000006073 displacement reaction Methods 0.000 claims description 25
- 230000009467 reduction Effects 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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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- 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
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/027—Compressor control by controlling pressure
- F25B2600/0271—Compressor control by controlling pressure the discharge pressure
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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
- F25B2600/00—Control issues
- F25B2600/15—Control issues during shut down
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2525—Pressure relief 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The application relates to a compressor starting protection device, a control method and an air-cooled water chilling unit, wherein the compressor starting protection device comprises a monitoring module and a four-way valve protection assembly; the monitoring module is used for monitoring the starting parameter value of the compressor; the four-way valve protection assembly is used for carrying out pressure relief treatment on air flow in the compressor exhaust pipe when the starting parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve. The sliding block of the four-way valve can be prevented from being damaged by too large impact of the compressor, the quality of the unit is improved, and the normal operation of the system is guaranteed.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a compressor starting protection device, a control method and an air-cooled water chilling unit.
Background
The four-way valve plays an important part for cold and hot switching in an air-cooled water chilling unit of the air conditioner, the reliability of the four-way valve determines the service life of the air conditioner, and the air conditioning system cannot normally run after the four-way valve fails. At the moment of starting the fixed-frequency scroll compressor of the air-cooled chiller, the starting impact of the compressor is very large, so that the air flow speed and the pressure of the four-way valve are very high, the sliding block of the four-way valve can be broken by high-speed air flow and high pressure, the four-way valve cannot be reversed, the quality of the modularized air-cooled chiller is reduced, and the complaints of customers are caused.
Disclosure of Invention
In order to overcome the problems that at least at the moment of starting a fixed-frequency scroll compressor of an air-cooled water chilling unit, the starting impact of the compressor is very large, the air flow speed and the pressure of the four-way valve are very high, the sliding block of the four-way valve is damaged by high-speed air flow and high pressure, the four-way valve cannot be reversed, the quality of a modularized air-cooled water chilling unit is reduced, and customer complaints are caused, the application provides a compressor starting protection device, a control method and the air-cooled water chilling unit.
In a first aspect, the present application provides a compressor start-up protection device, comprising:
the monitoring module and the four-way valve protection component;
the monitoring module is used for monitoring the starting parameter value of the compressor;
the four-way valve protection assembly is used for carrying out pressure relief treatment on air flow in the compressor exhaust pipe when the starting parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve.
Further, the four-way valve protection assembly comprises:
the controller, the bypass pipeline and the electromagnetic valve; the electromagnetic valve is arranged on the bypass pipeline, one end of the bypass pipeline is connected with the compressor, and the other end of the bypass pipeline is connected with the heat exchanger;
the electromagnetic valve is arranged on the bypass pipeline, the controller is respectively connected with the monitoring module and the electromagnetic valve, and the opening or closing of the electromagnetic valve is controlled according to the compressor starting parameter value monitored by the monitoring module to control the connection or disconnection of the bypass pipeline.
Further, the heat exchanger comprises a condenser and an evaporator,
the bypass pipeline comprises a first bypass pipeline and a second bypass pipeline;
the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve;
one end of the first bypass pipeline is connected with the compressor, and the other end of the first bypass pipeline is connected with the condenser;
the first electromagnetic valve is arranged on the first bypass pipeline and used for controlling the connection or disconnection of the first bypass pipeline;
one end of the second bypass pipeline is connected with the compressor, and the other end of the second bypass pipeline is connected with the evaporator;
the second electromagnetic valve is arranged on the second bypass pipeline and used for controlling the connection or disconnection of the second bypass pipeline.
Further, the electromagnetic valve further includes:
and the third electromagnetic valve is arranged on a pipeline between the exhaust pipe of the compressor and the four-way valve and used for controlling the connection or disconnection of the pipeline.
Further, the four-way valve protection assembly comprises:
the speed reduction pressure reduction valve is arranged on the compressor exhaust pipe;
the controller is connected with the monitoring module and used for controlling the opening or closing of the speed reduction pressure reduction valve and carrying out pressure relief treatment on air flow in the compressor exhaust pipe when the speed reduction pressure reduction valve is opened.
Further, the monitoring module includes:
the vibration displacement sensor is arranged on the compressor, and the starting parameter value of the compressor is the vibration displacement value of the compressor.
Further, the monitoring module includes:
the pressure sensor is used for detecting the air flow pressure in the exhaust pipe of the compressor, and the starting parameter value of the compressor is the air flow pressure in the exhaust pipe of the compressor.
Further, the monitoring module includes:
and the air flow velocity sensor is used for detecting the air flow velocity in the compressor exhaust pipe, and the starting parameter value of the compressor is the air flow velocity in the compressor exhaust pipe.
Further, when the compressor starting parameter value is a compressor vibration displacement value, the preset threshold value includes:
and presetting a vibration displacement value, wherein the preset vibration displacement value is 300 um.
In a second aspect, the present application provides a compressor start-up control method, including:
monitoring a compressor starting parameter value;
and when the starting parameter value exceeds a preset threshold value, the pressure of the air flow in the exhaust pipe of the compressor is relieved, so that the high-pressure air flow generated when the compressor is started is prevented from flowing into the four-way valve.
Further, compressor starting parameter value is compressor vibration displacement value, carries out the pressure release to the air current in the compressor exhaust pipe when starting parameter value surpasss and predetermines the threshold value and handles, includes:
judging the working mode of the compressor when the vibration displacement value of the compressor is greater than a preset threshold value;
and controlling the states of the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve according to the working mode of the compressor.
Further, the controlling the states of the first solenoid valve, the second solenoid valve and the third solenoid valve according to the working mode of the compressor includes:
if the working mode of the compressor is a refrigeration mode, the first electromagnetic valve is controlled to be opened, and the second electromagnetic valve and the third electromagnetic valve are controlled to be closed so as to control the first bypass pipeline to communicate the compressor exhaust pipe and the condenser;
and/or the presence of a gas in the gas,
and if the working mode of the compressor is a heating mode, the second electromagnetic valve is controlled to be opened, and the first electromagnetic valve and the third electromagnetic valve are controlled to be closed so as to control the second bypass pipeline to be communicated with the compressor exhaust pipe and the evaporator.
Further, the method also comprises the following steps:
and when the starting parameter value does not exceed the preset threshold value, the third electromagnetic valve is controlled to be opened, and the first electromagnetic valve and the second electromagnetic valve are closed, so that the pipeline between the compressor exhaust pipe and the four-way valve is communicated.
Further, when the starting parameter value exceeds a preset threshold value, the pressure relief processing is performed on the air flow in the compressor exhaust pipe, including:
and opening the pressure-reducing and speed-reducing electromagnetic valve when the starting parameter value exceeds a preset threshold value.
In a third aspect, the present application provides an air-cooled chiller comprising:
a compressor start-up protection device, a four-way valve, a compressor and a heat exchanger according to any one of the first aspect;
the compressor starting protection device is arranged between the compressor and the heat exchanger and used for carrying out pressure relief treatment on air flow in an exhaust pipe of the compressor when a starting parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve.
Further, the heat exchanger includes an evaporator and a condenser.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the compressor starting protection device comprises a monitoring module and a four-way valve protection assembly, wherein the monitoring module is used for monitoring a starting parameter value of the compressor, and the four-way valve protection assembly is used for carrying out pressure relief treatment on air flow in an exhaust pipe of the compressor when the starting parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve, so that the phenomenon that the compressor is impacted too much to damage a sliding block of the four-way valve can be avoided, the quality of the unit is improved, and the normal operation of the system is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a functional block diagram of a compressor start-up protection device according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a start-up protection device for a compressor according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a start-up protection device for a compressor according to an embodiment of the present application.
Fig. 4 is a flowchart of a compressor start-up control method according to an embodiment of the present application.
Fig. 5 is a flowchart illustrating another compressor start-up control method according to an embodiment of the present application.
Fig. 6 is a functional block diagram of an air-cooled chiller according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a functional block diagram of a compressor start-up protection device according to an embodiment of the present application, and as shown in fig. 1, the compressor start-up protection device includes:
the monitoring module 1 and the four-way valve protection component 2;
the monitoring module 1 is used for monitoring the starting parameter value of the compressor;
the four-way valve protection component 2 is used for carrying out pressure relief treatment on air flow in an exhaust pipe of the compressor when the starting parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve.
At the compressor start-up moment of air-cooled chiller, the start-up impact of compressor is very big, leads to through cross valve air velocity and pressure very high, and high velocity air and high pressure can break the slider of cross valve, lead to the unable switching-over of cross valve, reduce the quality of modularization air-cooled chiller.
In this embodiment, compressor start protection device includes monitoring module and cross valve protection component, and monitoring module is used for monitoring compressor start parameter value, and cross valve protection component is used for starting parameter value surpasss and carries out the pressure release to the air current in the compressor exhaust pipe when predetermineeing the threshold value and handle to prevent that the high-pressure draught that produces from flowing into the cross valve when the compressor starts, can avoid the compressor to strike too big slider of cross valve and break, promote the unit quality, assurance system normal operating.
Fig. 2 is a schematic structural diagram of a compressor start-up protection device according to an embodiment of the present application, and as shown in fig. 2, a four-way valve protection assembly in the compressor start-up protection device includes:
a controller (not shown), a bypass line and a solenoid valve; the electromagnetic valve is arranged on a bypass pipeline, one end of the bypass pipeline is connected with the compressor, and the other end of the bypass pipeline is connected with the heat exchanger;
the electromagnetic valve is arranged on the bypass pipeline, the controller (not shown in the figure) is respectively connected with the monitoring module and the electromagnetic valve, and the opening or closing of the electromagnetic valve is controlled according to the starting parameter value of the compressor monitored by the monitoring module to control the connection or disconnection of the bypass pipeline.
The heat exchanger comprises a condenser and an evaporator, and the bypass pipeline comprises a first bypass pipeline 21 and a second bypass pipeline 22;
the solenoid valves include a first solenoid valve 23 and a second solenoid valve 24;
one end of the first bypass pipeline 21 is connected with the compressor, and the other end is connected with the condenser;
the first electromagnetic valve 23 is arranged on the first bypass pipeline 21 and used for controlling the connection or disconnection of the first bypass pipeline;
one end of the second bypass pipeline 22 is connected with the compressor, and the other end is connected with the evaporator;
a second solenoid valve 24 is provided on the second bypass line 22 for controlling the connection or disconnection of the second bypass line 22.
The solenoid valve still includes: and the third electromagnetic valve 25, the third electromagnetic valve 25 is arranged on the pipeline between the compressor exhaust pipe and the four-way valve, and is used for controlling the connection or disconnection of the pipeline.
As shown in fig. 2, when the unit is in the cooling mode, the first electromagnetic valve 23 is opened, the second electromagnetic valve 24 and the third electromagnetic valve 25 are closed, and the air flow in the exhaust pipe of the compressor reaches the condenser through the first bypass pipeline; when the unit is in a heating mode, the second electromagnetic valve 24 is opened, the first electromagnetic valve 23 and the third electromagnetic valve 25 are closed, and the airflow in the exhaust pipe of the compressor reaches the evaporator through the second bypass pipeline, the fluorine injection nozzle electronic expansion valve and other components, so that the airflow in the exhaust pipe of the compressor does not pass through the four-way valve when the compressor is started in both the cooling mode and the heating mode, and the four-way valve can be protected against impact.
In this embodiment, through increasing the bypass pipeline on the compressor blast pipe, when the compressor starts to strike too big in the twinkling of an eye, the exhaust expert closes the bypass to condenser (or evaporimeter), avoids the too big slider that directly dashes the cross valve of compressor impact to be bad, waits that the compressor operation is normal after, closes first solenoid valve, second solenoid valve again, opens the third solenoid valve and switches to the cross valve in to make the system get into normal operating.
An embodiment of the present application provides another compressor start-up protection device, as shown in fig. 3, a schematic structural diagram of the compressor start-up protection device, where a four-way valve protection component includes:
a controller (not shown in the figure) and a deceleration pressure reducing valve 31, wherein the deceleration pressure reducing valve 31 is arranged on a compressor exhaust pipe;
and the controller (not shown in the figure) is connected with the monitoring module and used for controlling the opening or closing of the speed reduction pressure reduction valve and carrying out pressure relief treatment on the air flow in the compressor exhaust pipe when the speed reduction pressure reduction valve is opened.
In some embodiments, a monitoring module comprises:
the vibration displacement sensor is arranged on the compressor, and the starting parameter value of the compressor is the vibration displacement value of the compressor.
When the compressor starting parameter value is the compressor vibration displacement value, the preset threshold value comprises:
the vibration displacement value is preset, for example, 300 um.
And/or the presence of a gas in the gas,
the pressure sensor is used for detecting the air flow pressure in the compressor exhaust pipe, and the starting parameter value of the compressor is the air flow pressure in the compressor exhaust pipe.
And/or the presence of a gas in the gas,
and the air flow velocity sensor is used for detecting the air flow velocity in the compressor exhaust pipe, and the starting parameter value of the compressor is the air flow velocity in the compressor exhaust pipe.
In some embodiments, further comprising:
and the pressure switch 32 is arranged on a pipeline between the exhaust pipe of the compressor and the four-way valve, and is used for controlling the connection or disconnection of the pipeline.
The four-way valve is further protected by a pressure switch 32 to prevent the four-way valve from receiving high pressure air flow shock.
In the embodiment, a speed-reducing pressure-reducing valve is additionally arranged on a pipeline between the compressor and the four-way valve, the speed-reducing pressure-reducing valve is used for reducing the speed and the pressure of exhaust airflow to normal levels in the operation process, after the compressor normally operates, the speed-reducing pressure-reducing valve is closed, and the unit enters a normal operation state.
Fig. 4 is a flowchart of a compressor start-up control method according to an embodiment of the present application, and as shown in fig. 4, the compressor start-up control method includes:
s41: monitoring a compressor starting parameter value;
s42: and when the starting parameter value exceeds a preset threshold value, the pressure of the air flow in the exhaust pipe of the compressor is relieved, so that the high-pressure air flow generated when the compressor is started is prevented from flowing into the four-way valve.
In some embodiments, the compressor starting parameter value is a compressor vibration displacement value, and when the starting parameter value exceeds a preset threshold, the pressure relief processing is performed on the airflow in the compressor exhaust pipe, including:
judging the working mode of the compressor when the vibration displacement value of the compressor is greater than a preset threshold value;
and controlling the states of the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve according to the working mode of the compressor.
In some embodiments, controlling the states of the first solenoid valve, the second solenoid valve, and the third solenoid valve according to the compressor operation mode includes:
if the working mode of the compressor is a refrigeration mode, the first electromagnetic valve is controlled to be opened, and the second electromagnetic valve and the third electromagnetic valve are controlled to be closed so as to control the first bypass pipeline to communicate the compressor exhaust pipe and the condenser;
and/or the presence of a gas in the gas,
and if the working mode of the compressor is a heating mode, the second electromagnetic valve is controlled to be opened, and the first electromagnetic valve and the third electromagnetic valve are controlled to be closed so as to control the second bypass pipeline to be communicated with the compressor exhaust pipe and the evaporator.
And when the starting parameter value does not exceed the preset threshold value, the third electromagnetic valve is controlled to be opened, and the first electromagnetic valve and the second electromagnetic valve are closed so as to communicate the pipeline between the exhaust pipe of the compressor and the four-way valve.
As shown in fig. 5, when the vibration displacement of the compressor is greater than or equal to 300um, if the unit is in the refrigeration mode, the first electromagnetic valve 1 is opened, and the second electromagnetic valve and the third electromagnetic valve are closed; when the vibration displacement of the compressor is less than 300um, the third electromagnetic valve is opened, and the first electromagnetic valve and the second electromagnetic valve are closed; the exhaust of the whole unit system passes through the four-way valve and then is throttled by the condenser and then enters the evaporator, and the system operates normally. If the unit switches the heating mode, only the four-way valve is needed for reversing.
If the unit is in the heating mode, the second electromagnetic valve is opened, and the first electromagnetic valve and the third electromagnetic valve are closed; when the vibration displacement of the compressor is less than 300um, the third electromagnetic valve is opened, and the first electromagnetic valve and the second electromagnetic valve are closed; the exhaust of the whole unit system passes through the four-way valve and then is throttled by the evaporator and then enters the condenser, and the system operates normally. If the unit switches the refrigeration mode, only the four-way valve is needed for reversing.
In some embodiments, the depressurizing the air flow in the compressor exhaust pipe when the starting parameter value exceeds the preset threshold value comprises:
and opening the pressure-reducing and speed-reducing electromagnetic valve when the starting parameter value exceeds a preset threshold value.
When the vibration displacement of compressor more than or equal to 300um, the normal level that the speed and the pressure of exhaust air current all reduced the operation process is carried out in decompression deceleration solenoid valve effect, treats that the vibration displacement of compressor is less than 300um, and decompression deceleration solenoid valve closes, and the unit gets into normal operating condition.
In this embodiment, monitor compressor starting parameter value, carry out the pressure release processing to the air current in the compressor exhaust pipe when starting parameter value surpasss and predetermine the threshold value to the high-pressure draught that produces when preventing the compressor start flows into the cross valve, can avoid the compressor to strike too big slider to the cross valve and wash out, promotes the unit quality, guarantees system normal operating.
Fig. 6 is a functional block diagram of an air-cooled chiller according to an embodiment of the present application, and as shown in fig. 6, the air-cooled chiller includes:
a compressor start-up protection device 61, a four-way valve 62, a compressor 63, and a heat exchanger 64 as described in the above embodiments;
the compressor start-up protection device 61 is arranged between the compressor 63 and the heat exchanger 64 and is used for performing pressure relief treatment on air flow in a compressor exhaust pipe when a start-up parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve 62.
The heat exchanger 64 includes an evaporator and a condenser.
As shown in fig. 2, the start-up protection device of the compressor comprises a first bypass pipeline and a second bypass pipeline of the controller, a first electromagnetic valve and a second electromagnetic valve; one end of the first bypass pipeline is connected with the compressor, and the other end of the first bypass pipeline is connected with the condenser; the first electromagnetic valve is arranged on the first bypass pipeline and used for controlling the first bypass pipeline to be communicated or disconnected; one end of the second bypass pipeline is connected with the compressor, and the other end of the second bypass pipeline is connected with the evaporator; the second electromagnetic valve is arranged on the second bypass pipeline and used for controlling the connection or disconnection of the second bypass pipeline; further comprising: and the third electromagnetic valve is arranged on a pipeline between the exhaust pipe of the compressor and the four-way valve and used for controlling the connection or disconnection of the pipeline.
In this embodiment, through increasing compressor start protection device, increase the bypass structure on the blast pipe, when compressor start-up assaults too big in the twinkling of an eye, the exhaust clearance by pass to condenser (or evaporimeter), avoid the compressor to assault too big direct to dash the slider of cross valve bad, can solve the cross valve and cause the quality problem because of being washed out in the compressor start-up process, guarantee unit normal operating.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
It should be noted that the present invention is not limited to the above-mentioned preferred embodiments, and those skilled in the art can obtain other products in various forms without departing from the spirit of the present invention, but any changes in shape or structure can be made within the scope of the present invention with the same or similar technical solutions as those of the present invention.
Claims (16)
1. A compressor start-up protection device, comprising:
the monitoring module and the four-way valve protection component;
the monitoring module is used for monitoring the starting parameter value of the compressor;
the four-way valve protection assembly is used for carrying out pressure relief treatment on air flow in the compressor exhaust pipe when the starting parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve.
2. The compressor start-up protection device of claim 1, wherein the four-way valve protection assembly comprises:
the controller, the bypass pipeline and the electromagnetic valve; the electromagnetic valve is arranged on the bypass pipeline, one end of the bypass pipeline is connected with the compressor, and the other end of the bypass pipeline is connected with the heat exchanger;
the electromagnetic valve is arranged on the bypass pipeline, the controller is respectively connected with the monitoring module and the electromagnetic valve, and the opening or closing of the electromagnetic valve is controlled according to the compressor starting parameter value monitored by the monitoring module to control the connection or disconnection of the bypass pipeline.
3. The compressor start-up protection device of claim 2, wherein the heat exchanger includes a condenser and an evaporator,
the bypass pipeline comprises a first bypass pipeline and a second bypass pipeline;
the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve;
one end of the first bypass pipeline is connected with the compressor, and the other end of the first bypass pipeline is connected with the condenser;
the first electromagnetic valve is arranged on the first bypass pipeline and used for controlling the connection or disconnection of the first bypass pipeline;
one end of the second bypass pipeline is connected with the compressor, and the other end of the second bypass pipeline is connected with the evaporator;
the second electromagnetic valve is arranged on the second bypass pipeline and used for controlling the connection or disconnection of the second bypass pipeline.
4. The compressor start-up protection device of claim 3, wherein the solenoid valve further comprises:
and the third electromagnetic valve is arranged on a pipeline between the exhaust pipe of the compressor and the four-way valve and used for controlling the connection or disconnection of the pipeline.
5. The compressor start-up protection device of claim 1, wherein the four-way valve protection assembly comprises:
the speed reduction pressure reduction valve is arranged on the compressor exhaust pipe;
the controller is connected with the monitoring module and used for controlling the opening or closing of the speed reduction pressure reduction valve and carrying out pressure relief treatment on air flow in the compressor exhaust pipe when the speed reduction pressure reduction valve is opened.
6. The compressor start-up protection device of claim 1, wherein the monitoring module comprises:
the vibration displacement sensor is arranged on the compressor, and the starting parameter value of the compressor is the vibration displacement value of the compressor.
7. The compressor start-up protection device of claim 1, wherein the monitoring module comprises:
the pressure sensor is used for detecting the air flow pressure in the exhaust pipe of the compressor, and the starting parameter value of the compressor is the air flow pressure in the exhaust pipe of the compressor.
8. The compressor start-up protection device of claim 1, wherein the monitoring module comprises:
and the air flow velocity sensor is used for detecting the air flow velocity in the compressor exhaust pipe, and the starting parameter value of the compressor is the air flow velocity in the compressor exhaust pipe.
9. The compressor start-up protection device of claim 4, wherein when the compressor start-up parameter value is a compressor vibration displacement value, the preset threshold value comprises:
and presetting a vibration displacement value, wherein the preset vibration displacement value is 300 um.
10. A compressor start-up control method, characterized by comprising:
monitoring a compressor starting parameter value;
and when the starting parameter value exceeds a preset threshold value, the pressure of the air flow in the exhaust pipe of the compressor is relieved, so that the high-pressure air flow generated when the compressor is started is prevented from flowing into the four-way valve.
11. The compressor starting control method according to claim 10, wherein the compressor starting parameter value is a compressor vibration displacement value, and when the starting parameter value exceeds a preset threshold value, the pressure relief treatment is performed on the air flow in the compressor exhaust pipe, and the method comprises the following steps:
judging the working mode of the compressor when the vibration displacement value of the compressor is greater than a preset threshold value;
and controlling the states of the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve according to the working mode of the compressor.
12. The compressor start-up control method as set forth in claim 11, wherein the controlling of the states of the first solenoid valve, the second solenoid valve, and the third solenoid valve according to the compressor operation mode includes:
if the working mode of the compressor is a refrigeration mode, the first electromagnetic valve is controlled to be opened, and the second electromagnetic valve and the third electromagnetic valve are controlled to be closed so as to control the first bypass pipeline to communicate the compressor exhaust pipe and the condenser;
and/or the presence of a gas in the gas,
and if the working mode of the compressor is a heating mode, the second electromagnetic valve is controlled to be opened, and the first electromagnetic valve and the third electromagnetic valve are controlled to be closed so as to control the second bypass pipeline to be communicated with the compressor exhaust pipe and the evaporator.
13. The compressor start-up control method as set forth in claim 10, further comprising:
and when the starting parameter value does not exceed the preset threshold value, the third electromagnetic valve is controlled to be opened, and the first electromagnetic valve and the second electromagnetic valve are closed, so that the pipeline between the compressor exhaust pipe and the four-way valve is communicated.
14. The compressor start-up control method according to claim 10, wherein the pressure relief processing of the gas flow in the compressor exhaust pipe when the start-up parameter value exceeds the preset threshold value comprises:
and opening the pressure-reducing and speed-reducing electromagnetic valve when the starting parameter value exceeds a preset threshold value.
15. An air-cooled chiller, comprising: a compressor start-up protection device, a four-way valve, a compressor and a heat exchanger according to any one of claims 1 to 9;
the compressor starting protection device is arranged between the compressor and the heat exchanger and used for carrying out pressure relief treatment on air flow in an exhaust pipe of the compressor when a starting parameter value exceeds a preset threshold value so as to prevent high-pressure air flow generated when the compressor is started from flowing into the four-way valve.
16. The air-cooled chiller according to claim 15 wherein the heat exchanger comprises an evaporator and a condenser.
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