CN112393469B - Air conditioning unit and water hammer eliminating control method thereof - Google Patents
Air conditioning unit and water hammer eliminating control method thereof Download PDFInfo
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- CN112393469B CN112393469B CN201910712755.7A CN201910712755A CN112393469B CN 112393469 B CN112393469 B CN 112393469B CN 201910712755 A CN201910712755 A CN 201910712755A CN 112393469 B CN112393469 B CN 112393469B
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- hammer eliminating
- evaporator
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
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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
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
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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
- F25B2500/00—Problems to be solved
- F25B2500/13—Vibrations
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioning unit and a water hammer elimination control method thereof. The invention aims to solve the problem that the existing air conditioning unit is not good in a mode of eliminating the water hammer effect. Therefore, the air conditioning unit comprises a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator and a water hammer eliminating pipeline, wherein an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor; when the solenoid valve was closed suddenly, refrigerant supply line can eliminate pipeline and the direct intercommunication of evaporimeter through the water hammer, because the inside of evaporimeter belongs to the low pressure environment, during refrigerant that flows in the refrigerant supply line can flow into the evaporimeter rapidly through the water hammer elimination pipeline to effectively eliminate the water hammer effect in the pipeline, and then form effective protection to solenoid valve and pipeline.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioning unit and a water hammer elimination control method thereof.
Background
Along with the continuous improvement of living standard of people, people also put forward higher and higher requirements on living environment. In order to maintain a comfortable ambient temperature, air conditioning units have become an essential device in human life. Although various designs of the air conditioning unit are more and more mature in recent years, the existing air conditioning unit still has some problems; for example, the solenoid valve in the existing air conditioning unit is easy to generate a water hammer effect when being switched on and off, so that a great impact is caused to nearby pipelines, the impact not only can cause the pipelines to generate violent vibration, but also can possibly damage the pipelines and the solenoid valve.
In order to avoid the water hammer effect as much as possible, the existing air conditioning unit generally adopts the following three ways: 1. the water hammer eliminator is arranged in a pipeline at the upstream of the electromagnetic valve, however, the volume of the existing water hammer eliminator is usually large, and the existing water hammer eliminator with smaller volume is expensive, can bear smaller pressure and is not suitable for a high-pressure refrigerant pipeline; 2. a slow-closing check valve is arranged in a pipeline at the upstream of the electromagnetic valve, but the volume of the slow-closing check valve is usually large, and the slow-closing check valve is only suitable for a water supply pipeline and is not suitable for a refrigerant pipeline with a smaller pipe diameter; 3. a safety relief valve is arranged in a pipeline on the upstream of the electromagnetic valve, however, a certain amount of refrigerant needs to be discharged in the pressure relief process of the safety relief valve, and a large amount of refrigerant is easily leaked in the frequent opening and closing process of the electromagnetic valve, so that the normal operation of the air conditioning unit is influenced. Therefore, the existing water hammer effect eliminating mode is not good, and therefore the existing air conditioning unit brings new problems in the water hammer effect eliminating process.
Accordingly, there is a need in the art for a new air conditioning unit and a water hammer removal control method thereof to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the existing air conditioning unit is not good in the way of eliminating the water hammer effect, the present invention provides an air conditioning unit, which comprises a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator and a water hammer eliminating pipeline, wherein an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor, one end of the water hammer eliminating pipeline is connected to the upstream of the electromagnetic valve, and the other end of the water hammer eliminating pipeline is connected to the evaporator, so that the refrigerant supply pipeline can be directly communicated with the evaporator.
In a preferred technical solution of the above air conditioning unit, the water hammer eliminating pipeline includes a first water hammer eliminating pipeline, the refrigerant supply pipeline includes a gas return pipeline of an economizer of the air conditioning unit, the solenoid valve includes a gas return solenoid valve disposed on the gas return pipeline, one end of the first water hammer eliminating pipeline is connected to an upstream of the gas return solenoid valve, and the other end of the first water hammer eliminating pipeline is connected to the evaporator, so that the gas return pipeline can be directly communicated with the evaporator.
In a preferred technical solution of the above air conditioning unit, the first water hammer eliminating pipeline is provided with a first electromagnetic valve.
In the preferable technical scheme of the air conditioning unit, the first water hammer eliminating pipeline is made of a copper pipe, a first ball valve is arranged at the downstream of a first electromagnetic valve of the first water hammer eliminating pipeline, and/or the first water hammer eliminating pipeline is made of a hose, and first needle valves are arranged at two ends of the first water hammer eliminating pipeline.
In the preferable technical scheme of the air conditioning unit, the water hammer eliminating pipeline further comprises a second water hammer eliminating pipeline, the refrigerant supply pipeline further comprises a liquid spraying pipeline of the air conditioning unit, the electromagnetic valve further comprises a liquid spraying electromagnetic valve arranged between the liquid spraying pipeline and the compressor, one end of the second water hammer eliminating pipeline is connected to the upstream of the liquid spraying electromagnetic valve, and the other end of the second water hammer eliminating pipeline is connected to the evaporator, so that the liquid spraying pipeline can be directly communicated with the evaporator.
In a preferred technical solution of the above air conditioning unit, a second electromagnetic valve is disposed on the second water hammer eliminating pipeline.
In the preferable technical scheme of the air conditioning unit, the second water hammer eliminating pipeline is made of a copper pipe, a second ball valve is arranged at the downstream of a second electromagnetic valve of the second water hammer eliminating pipeline, and/or the second water hammer eliminating pipeline is made of a hose, and second needle valves are arranged at two ends of the second water hammer eliminating pipeline.
In the preferable technical scheme of the air conditioning unit, the air conditioning unit is a magnetic suspension centrifugal air conditioning unit.
The invention also provides a water hammer eliminating control method for the air conditioning unit, wherein the air conditioning unit comprises a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator and a water hammer eliminating pipeline, an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor, one end of the water hammer eliminating pipeline is connected to the upstream of the electromagnetic valve, and the other end of the water hammer eliminating pipeline is connected to the evaporator, so that the refrigerant supply pipeline can be directly communicated with the evaporator; the water hammer eliminating pipeline comprises a first water hammer eliminating pipeline, the refrigerant supply pipeline comprises a gas return pipeline of an economizer of the air conditioning unit, the electromagnetic valve comprises a gas return electromagnetic valve arranged on the gas return pipeline, one end of the first water hammer eliminating pipeline is connected to the upstream of the gas return electromagnetic valve, and the other end of the first water hammer eliminating pipeline is connected to the evaporator, so that the gas return pipeline can be directly communicated with the evaporator; the water hammer removal control method includes: under the condition that the compressor stops running, acquiring the opening and closing state of the air return electromagnetic valve; if the air return electromagnetic valve is in a closed state, communicating the first water hammer eliminating pipeline; and after the preset time, disconnecting the first water hammer eliminating pipeline.
The invention also provides a water hammer eliminating control method for the air conditioning unit, wherein the air conditioning unit comprises a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator and a water hammer eliminating pipeline, an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor, one end of the water hammer eliminating pipeline is connected to the upstream of the electromagnetic valve, and the other end of the water hammer eliminating pipeline is connected to the evaporator, so that the refrigerant supply pipeline can be directly communicated with the evaporator; the water hammer eliminating pipeline further comprises a second water hammer eliminating pipeline, the refrigerant supply pipeline further comprises a liquid spraying pipeline of the air conditioning unit, the electromagnetic valve further comprises a liquid spraying electromagnetic valve arranged between the liquid spraying pipeline and the compressor, one end of the second water hammer eliminating pipeline is connected to the upstream of the liquid spraying electromagnetic valve, and the other end of the second water hammer eliminating pipeline is connected to the evaporator, so that the liquid spraying pipeline can be directly communicated with the evaporator; the water hammer removal control method includes: acquiring the opening and closing state of the liquid spraying electromagnetic valve; if the liquid spraying electromagnetic valve is in a closed state, communicating the second water hammer eliminating pipeline; and if the liquid injection electromagnetic valve is in an open state, disconnecting the second water hammer eliminating pipeline.
The technical scheme includes that the air conditioning unit comprises a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator and a water hammer eliminating pipeline, wherein an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor, one end of the water hammer eliminating pipeline is connected to the upstream of the electromagnetic valve, and the other end of the water hammer eliminating pipeline is connected to the evaporator, so that the refrigerant supply pipeline can be directly communicated with the evaporator. It can be understood that, under the condition that no water hammer eliminating pipeline is arranged, when the electromagnetic valve is suddenly closed, the refrigerant flowing in the refrigerant supply pipeline generates a strong water hammer effect, so that a huge impact force is generated on the electromagnetic valve and the refrigerant supply pipeline, and the electromagnetic valve and the pipeline are easily damaged. The invention can make the refrigerant supply pipeline directly communicate with the evaporator by arranging the water hammer eliminating pipeline; when the electromagnetic valve is suddenly closed, the refrigerant supply pipeline can be directly communicated with the evaporator through the water hammer eliminating pipeline, and because the inside of the evaporator belongs to a low-pressure environment, when the water hammer eliminating pipeline is communicated, the refrigerant flowing in the refrigerant supply pipeline can be rapidly introduced into the evaporator through the water hammer eliminating pipeline, so that the water hammer effect is effectively eliminated, and the electromagnetic valve and the pipeline are effectively protected. The invention realizes the effect of eliminating the water hammer effect through a simple branch design, namely effectively eliminating the water hammer effect in a pipeline through lower cost.
Drawings
FIG. 1 is a schematic diagram of the air conditioning assembly of the present invention;
FIG. 2 is a flow chart of the steps of a first preferred embodiment of the water hammer cancellation control method of the present invention;
fig. 3 is a flowchart of the steps of a second preferred embodiment of the water hammer removal control method of the present invention.
Reference numerals: 1. a compressor; 2. an evaporator; 3. a condenser; 4. an economizer; 41. a gas return line; 42. an air return electromagnetic valve; 5. a liquid spray line;
101. a first water hammer eliminating pipeline; 102. a first solenoid valve; 103. a first ball valve;
201. a second water hammer eliminating pipeline; 202. a second solenoid valve; 203. a second ball valve.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the steps of the method of the present invention are described herein in a particular order, these orders are not limiting, and one skilled in the art may perform the steps in a different order without departing from the underlying principles of the invention.
It should be noted that in the description of the preferred embodiment of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should also be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connected" are used broadly and encompass, for example, direct connection, indirect connection through an intermediary, and communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring first to fig. 1, a schematic diagram of an air conditioning unit according to the present invention is shown. As shown in fig. 1, the air conditioning unit of the present invention includes a main circulation loop (not completely shown in the figure), and a compressor 1, an evaporator 2 and a condenser 3 which are disposed on the main circulation loop, wherein a refrigerant in the air conditioning unit circulates through the main circulation loop; in the process of the air conditioning unit operating the refrigeration working condition, a part of gaseous refrigerant flowing out of the evaporator 2 can directly enter the compressor 1, and the other part of liquid refrigerant can enter the compressor 1 after secondary evaporation is realized through the economizer 4, so that the operation range of the compressor is effectively enlarged. Specifically, the economizer 4 supplies a gaseous refrigerant to the compressor 1 through a return pipe 41, and the return pipe 41 is further provided with a return solenoid valve 42 for controlling an on/off state of the return pipe 41. Meanwhile, the air conditioning unit is also provided with a liquid injection pipeline 5, and the liquid injection pipeline 5 can directly introduce the low-temperature liquid refrigerant cooled by the condenser 3 into the compressor 1 so as to cool the compressor 1; it should be noted that, the present invention does not limit the connection position of the other end of the liquid injection pipeline 5, and a technician may set the connection position of the other end of the liquid injection pipeline 5 according to the actual structure of the air conditioning unit, as long as the liquid injection pipeline 5 can directly introduce the cooled low-temperature liquid refrigerant into the compressor 1. Meanwhile, a liquid injection solenoid valve (not shown in the figure) is further disposed between the liquid injection pipeline 5 and the compressor 1, and the liquid injection solenoid valve is used for controlling the on-off state of the liquid injection pipeline 5 so as to introduce the cooled refrigerant into the compressor 1 when needed, and also can control the refrigerant flow in the liquid injection pipeline 5. It can be understood by those skilled in the art that the present invention does not limit any other specific structure in the air conditioning unit, and those skilled in the art can set the specific structure of the air conditioning unit according to the actual use requirement, and the structure of the unrelated water hammer eliminating pipeline is changed without departing from the basic principle of the present invention, and falls into the protection scope of the present invention. In addition, it should be noted that although the air conditioning unit described in the preferred embodiment is provided with the economizer 4 and the liquid injection pipeline 5, both structural arrangements are obviously not restrictive, and a technician can set the arrangement position of the water hammer eliminating pipeline according to actual use requirements, as long as the water hammer eliminating pipeline can directly communicate a certain refrigerant supply pipeline provided with an electromagnetic valve with the evaporator to eliminate the water hammer effect caused by the switching operation of the electromagnetic valve.
Further, in the preferred embodiment, the air conditioning unit further includes a first water hammer eliminating pipeline 101, one end of the first water hammer eliminating pipeline 101 is connected between the economizer 4 and the air return solenoid valve 42, that is, the air return solenoid valve 42 on the air return pipeline 41 is located upstream, and the other end of the first water hammer eliminating pipeline 101 is directly communicated with the inside of the evaporator 2, so that the refrigerant in the air return pipeline 41 can directly enter the evaporator 2 through the first water hammer eliminating pipeline 101. It can be understood that, in the case that the first water hammer eliminating pipeline 101 is not provided, when the air return solenoid valve 42 is suddenly closed, the refrigerant flowing in the air return line 41 generates a strong water hammer effect, so as to generate a great impact force on the air return solenoid valve 42 and the air return line 41, thereby easily causing a problem of damage to the air return solenoid valve 42 and the air return line 41. The preferred embodiment is provided with a first water hammer eliminating pipeline 101, so that the air return pipeline 41 can be directly communicated with the evaporator 2; that is, when the air-return solenoid valve 42 is suddenly closed, the air-return line 41 can be directly communicated with the evaporator 2 through the first water hammer eliminating pipeline 101, because the inside of the evaporator 2 belongs to a low-pressure environment, when the first water hammer eliminating pipeline 101 is communicated, the refrigerant flowing in the air-return line 41 can be rapidly introduced into the evaporator 2 through the first water hammer eliminating pipeline 101, so that the water hammer effect is effectively eliminated, and the air-return solenoid valve 42 and the air-return line 41 are effectively protected.
Further, as a preferred embodiment, the first water hammer eliminating pipeline 101 is provided with a first electromagnetic valve 102, and the air conditioning unit can control the on-off state of the first water hammer eliminating pipeline 101 by controlling the on-off state of the first electromagnetic valve 102. Of course, this arrangement is not limiting, and the technician may control the on/off state of the first water hammer removing line 101 in other ways. Meanwhile, in order to facilitate the maintenance of the air return electromagnetic valve 42, the first water hammer eliminating pipeline 101 is further provided with a first ball valve 103, and the first ball valve 103 is arranged at the downstream of the first electromagnetic valve 102; in order to cooperate with the installation and use of the first ball valve 103, the first water hammer eliminating line 101 may be made of a copper pipe, accordingly. When the air return solenoid valve 42 needs to be maintained, a maintenance worker can isolate the refrigerant in the first water hammer removal pipeline 101 from the refrigerant in the evaporator 2 only by closing the first ball valve 103, thereby effectively avoiding the refrigerant leakage. It should be noted that, this arrangement is not restrictive, and the specific structure may be set by the skilled person according to the actual use requirement; for example, the first water hammer eliminating line 101 may be made of a flexible tube, and the first needle valve may be disposed at both ends of the flexible tube to block the flow of the refrigerant at both ends.
Referring to fig. 1, in a further preferred embodiment, the air conditioning unit further includes a second water hammer eliminating pipeline 201, one end of the second water hammer eliminating pipeline 201 is connected to the liquid spraying pipeline 5, and the other end of the second water hammer eliminating pipeline 201 is directly communicated with the inside of the evaporator 2 at the upstream of the liquid spraying electromagnetic valve, so that the refrigerant in the liquid spraying pipeline 5 can directly enter the evaporator 2 through the second water hammer eliminating pipeline 201. It can be understood that, in the case that the second water hammer eliminating pipeline 201 is not provided, when the liquid injection solenoid valve is suddenly closed, the refrigerant flowing in the liquid injection pipeline 5 generates a strong water hammer effect, so as to generate a great impact force on the liquid injection solenoid valve and the liquid injection pipeline 5, thereby easily causing a problem of damage to the liquid injection solenoid valve and the liquid injection pipeline 5. In the preferred embodiment, the air conditioning unit is provided with a second water hammer eliminating pipeline 201, so that the liquid spraying pipeline 5 can be directly communicated with the evaporator 2; that is, when the liquid injection solenoid valve is suddenly closed, the liquid injection pipeline 5 can be directly communicated with the evaporator 2 through the second water hammer eliminating pipeline 201, and since the inside of the evaporator 2 belongs to a low-pressure environment, when the second water hammer eliminating pipeline 201 is communicated, a refrigerant flowing in the liquid injection pipeline 5 can be rapidly introduced into the evaporator 2 through the second water hammer eliminating pipeline 201, so that the water hammer effect is effectively eliminated, and the liquid injection solenoid valve and the liquid injection pipeline 5 are effectively protected.
Further, as a preferred embodiment, a second electromagnetic valve 202 is disposed on the second water hammer removing pipeline 201, and the air conditioning unit can control the on-off state of the second water hammer removing pipeline 201 by controlling the on-off state of the second electromagnetic valve 202. Of course, this arrangement is not limiting, and the technician may control the on/off state of the second water hammer removing line 201 in other manners. Meanwhile, in order to facilitate maintenance of the liquid injection solenoid valve, a second ball valve 203 is further arranged on the second water hammer removing pipeline 201, and the second ball valve 203 is arranged at the downstream of the second solenoid valve 202; in order to cooperate with the installation and use of the second ball valve 203, the second water hammer eliminating line 201 may be made of a copper pipe, accordingly. When the liquid injection solenoid valve needs to be maintained, a maintenance worker can isolate the refrigerant in the second water hammer removal pipeline 201 from the refrigerant in the evaporator 2 only by closing the second ball valve 203, so that the refrigerant leakage is effectively avoided. It should be noted that, this arrangement is not restrictive, and the specific structure may be set by the skilled person according to the actual use requirement; for example, the second water hammer eliminating line 201 may be made of a flexible tube, and the first needle valve may be disposed at both ends of the flexible tube to block the refrigerant flowing therethrough.
Furthermore, the air conditioning unit is also provided with a controller that can acquire the open-closed state of each valve structure, and that can also control the operating state of the air conditioning unit, for example, the open-closed state of each valve structure, and the like. Meanwhile, as can be understood by those skilled in the art, the present invention does not impose any limitation on the specific structure and model of the controller, as long as the controller can implement the above functions, and the controller may be an original controller of the air conditioning unit, or a controller separately provided for executing the water hammer removing control method of the present invention, and a technician may set the structure and model of the controller according to actual use requirements.
Referring now to fig. 2, a flowchart of the steps of a first preferred embodiment of the water hammer removal control method of the present invention is shown. As shown in fig. 2, based on the air conditioning unit described in the foregoing embodiment, the first preferred embodiment of the water hammer removing control method of the present invention specifically includes the following steps:
s101: under the condition that the compressor stops running, acquiring the opening and closing state of an air return electromagnetic valve;
s102: judging whether the air return electromagnetic valve is in a closed state or not; if yes, executing step S103; if not, executing step S101 again;
s103: communicating the first water hammer eliminating pipeline;
s104: after a preset time, the first water hammer eliminating pipeline is disconnected.
Further, in step S101, in the case where the controller acquires that the compressor 1 has stopped operating, the controller can acquire the open/close state of the return air solenoid valve 42 in real time; it should be noted that the compressor 1 and the return air solenoid valve 42 are not necessarily closed synchronously, but only when the return air solenoid valve 42 is closed, the water hammer effect is caused; therefore, the controller needs to monitor the open/close state of the return solenoid valve 42 in real time after the compressor 1 stops operating. Next, in step S102, the controller can determine whether the return air solenoid valve 42 is in a closed state to selectively communicate the first water hammer eliminating line 101. Based on the determination result in step S102, if the air return solenoid valve 42 is in the open state, it indicates that no water hammer effect is generated in the air return pipeline 41, and at this time, it is sufficient to continuously obtain the open/close state of the air return solenoid valve 42; if the air return solenoid valve 42 is in the closed state, the controller controls the first solenoid valve 102 to open, so that the first water hammer eliminating pipeline 101 is communicated, and the residual refrigerant in the air return pipeline 41 can enter the evaporator 2 through the first water hammer eliminating pipeline 101, thereby effectively eliminating the water hammer effect. Since the compressor 1 has been stopped and the water hammer effect is only generated for a period of time after the air return solenoid valve 42 is closed, in order to effectively ensure the pressure balance in the air conditioning unit, step S104 needs to be executed, that is, after a preset time elapses, the controller can control the first solenoid valve 102 to close, so as to disconnect the first water hammer removing pipeline 101. It should be noted that, a technician needs to set the length of the preset time according to the actual use condition. In addition, as can be understood by those skilled in the art, the present invention does not limit the manner of controlling the on/off of the first water hammer removing pipeline 101, and the skilled person can set the on/off according to the actual use requirement.
Referring finally to fig. 3, a flow chart of the steps of a second preferred embodiment of the water hammer removal control method of the present invention is shown. As shown in fig. 3, based on the air conditioning unit described in the foregoing embodiment, a second preferred embodiment of the water hammer removing control method of the present invention specifically includes the following steps:
s201: acquiring the opening and closing state of the liquid injection electromagnetic valve;
s202: judging whether the liquid injection electromagnetic valve is in a closed state or not; if yes, go to step S203; if not, executing step S204;
s203: communicating the second water hammer eliminating pipeline;
s204: the second water hammer removal line is disconnected.
Further, in step S201, the controller may acquire an open/close state of the liquid injection solenoid valve; it should be noted that, the present invention does not limit any specific way for the controller to obtain the open/close state of the liquid injection solenoid valve. Next, in step S202, the controller can determine whether the liquid spray solenoid valve is in a closed state, so as to control the communication state of the second water hammer removing line 201 according to the determination result. Meanwhile, if the controller determines that the liquid spray solenoid valve is in a closed state based on the determination result of step S202, step S203 is performed, in which the controller controls the second solenoid valve 202 to be opened to communicate the second water hammer removing line 201. If the controller determines that the liquid spray solenoid valve is in a closed state, step S204 is executed, that is, the controller controls the second solenoid valve 202 to close, so as to disconnect the second water hammer removing line 201. In other words, in the preferred embodiment, the liquid injection pipeline 5 and the second water hammer eliminating pipeline 201 are alternatively communicated all the time, that is, when the liquid injection pipeline 5 is communicated, the second water hammer eliminating pipeline 201 is disconnected, so as to ensure that the liquid injection pipeline 5 can rapidly cool the compressor 1; when the liquid injection pipe 5 is disconnected, the second water hammer elimination pipe 201 is connected to ensure that the liquid injection pipe 5 can be always connected to the low pressure side, thereby effectively eliminating the water hammer effect in the liquid injection pipe 5. In addition, as can be understood by those skilled in the art, the present invention does not set any limitation to the manner of controlling the on/off of the second water hammer removing pipeline 201, and the skilled person can set the on/off according to the actual use requirement.
Finally, it should be noted that the above examples are all preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. When the present invention is actually used, a part of the steps may be added or deleted as needed or the order between the different steps may be changed by those skilled in the art. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
So far, the preferred embodiments of the present invention have been described in conjunction with the accompanying drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (8)
1. An air conditioning unit is characterized by comprising a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator, a condenser and a water hammer eliminating pipeline,
an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor,
one end of the water hammer eliminating pipeline is connected to the upstream of the electromagnetic valve, and the other end of the water hammer eliminating pipeline is connected to the evaporator, so that the refrigerant supply pipeline can be directly communicated with the evaporator;
the water hammer eliminating pipeline comprises a first water hammer eliminating pipeline, the refrigerant supply pipeline comprises an air return pipeline of an economizer of the air conditioning unit, the economizer supplies gaseous refrigerant to the compressor through the gas return pipeline, the electromagnetic valve comprises a gas return electromagnetic valve arranged on the gas return pipeline, one end of the first water hammer eliminating pipeline is connected to the upstream of the air return electromagnetic valve, the other end of the first water hammer eliminating pipeline is connected to the evaporator, so that the air return pipeline can be directly communicated with the evaporator, under the condition that the air return electromagnetic valve is closed and the first water hammer eliminating pipeline is communicated, the air return pipeline is directly communicated with the evaporator through the first water hammer eliminating pipeline so as to introduce the refrigerant flowing in the air return pipeline into the evaporator through the first water hammer eliminating pipeline; and/or
The water hammer eliminating pipeline also comprises a second water hammer eliminating pipeline, the refrigerant supply pipeline also comprises a liquid spraying pipeline of the air conditioning unit, the liquid injection pipeline is set to be capable of directly introducing the low-temperature liquid refrigerant cooled by the condenser into the compressor, the solenoid valve further comprises a liquid injection solenoid valve disposed between the liquid injection line and the compressor, one end of the second water hammer eliminating pipeline is connected to the upstream of the liquid spraying electromagnetic valve, the other end of the second water hammer eliminating pipeline is connected to the evaporator, so that the liquid spraying pipeline can be directly communicated with the evaporator, and under the condition that the liquid injection electromagnetic valve is closed and the second water hammer eliminating pipeline is communicated, the liquid injection pipeline is directly communicated with the evaporator through the second water hammer eliminating pipeline so as to introduce the refrigerant flowing in the liquid injection pipeline into the evaporator through the second water hammer eliminating pipeline.
2. The air conditioning assembly as set forth in claim 1 wherein a first solenoid valve is disposed on said first water hammer eliminating line.
3. Air conditioning assembly according to claim 2, characterized in that said first water hammer eliminating line is made of copper tubing, is provided with a first ball valve downstream of its first solenoid valve and/or
The first water hammer eliminating pipeline is made of a hose, and first needle valves are arranged at two ends of the first water hammer eliminating pipeline.
4. The air conditioning assembly as set forth in claim 1 wherein a second solenoid valve is disposed in said second water hammer eliminating line.
5. Air conditioning assembly according to claim 4, characterized in that said second water hammer eliminating line is made of copper pipe, is provided with a second ball valve downstream of the second solenoid valve and/or
The second water hammer eliminating pipeline is made of a hose, and second needle valves are arranged at two ends of the second water hammer eliminating pipeline.
6. Air conditioning assembly according to any of claims 1 to 3, characterized in that it is a magnetic levitation centrifugal air conditioning assembly.
7. A water hammer eliminating control method for an air conditioning unit is characterized in that the air conditioning unit comprises a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator and a water hammer eliminating pipeline, wherein an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor, one end of the water hammer eliminating pipeline is connected to the upstream of the electromagnetic valve, and the other end of the water hammer eliminating pipeline is connected to the evaporator, so that the refrigerant supply pipeline can be directly communicated with the evaporator;
wherein the water hammer eliminating pipeline comprises a first water hammer eliminating pipeline, the refrigerant supply pipeline comprises an air return pipeline of an economizer of the air conditioning unit, the economizer supplies gaseous refrigerant to the compressor through the gas return pipeline, the electromagnetic valve comprises a gas return electromagnetic valve arranged on the gas return pipeline, one end of the first water hammer eliminating pipeline is connected to the upstream of the air return electromagnetic valve, the other end of the first water hammer eliminating pipeline is connected to the evaporator, so that the air return pipeline can be directly communicated with the evaporator, under the condition that the air return electromagnetic valve is closed and the first water hammer eliminating pipeline is communicated, the air return pipeline is directly communicated with the evaporator through the first water hammer eliminating pipeline so as to introduce the refrigerant flowing in the air return pipeline into the evaporator through the first water hammer eliminating pipeline;
the water hammer removal control method includes:
under the condition that the compressor stops running, acquiring the opening and closing state of the air return electromagnetic valve;
if the air return electromagnetic valve is in a closed state, communicating the first water hammer eliminating pipeline;
and after a preset time, disconnecting the first water hammer eliminating pipeline.
8. A water hammer eliminating control method for an air conditioning unit is characterized in that the air conditioning unit comprises a compressor, a refrigerant supply pipeline connected with the compressor, an evaporator, a condenser and a water hammer eliminating pipeline, wherein an electromagnetic valve is arranged on the refrigerant supply pipeline or between the refrigerant supply pipeline and the compressor, one end of the water hammer eliminating pipeline is connected to the upstream of the electromagnetic valve, and the other end of the water hammer eliminating pipeline is connected to the evaporator so that the refrigerant supply pipeline can be directly communicated with the evaporator;
wherein the water hammer eliminating pipeline also comprises a second water hammer eliminating pipeline, the refrigerant supply pipeline also comprises a liquid spraying pipeline of the air conditioning unit, the liquid injection pipeline is set to be capable of directly introducing the low-temperature liquid refrigerant cooled by the condenser into the compressor, the solenoid valve further comprises a liquid injection solenoid valve disposed between the liquid injection line and the compressor, one end of the second water hammer eliminating pipeline is connected to the upstream of the liquid spraying electromagnetic valve, the other end of the second water hammer eliminating pipeline is connected to the evaporator, so that the liquid spraying pipeline can be directly communicated with the evaporator, under the condition that the liquid injection electromagnetic valve is closed and the second water hammer eliminating pipeline is communicated, the liquid injection pipeline is directly communicated with the evaporator through the second water hammer eliminating pipeline so as to introduce the refrigerant flowing in the liquid injection pipeline into the evaporator through the second water hammer eliminating pipeline;
the water hammer removal control method includes:
acquiring the opening and closing state of the liquid injection electromagnetic valve;
if the liquid injection electromagnetic valve is in a closed state, communicating the second water hammer eliminating pipeline; and if the liquid injection electromagnetic valve is in an open state, disconnecting the second water hammer eliminating pipeline.
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| CN201910712755.7A CN112393469B (en) | 2019-08-02 | 2019-08-02 | Air conditioning unit and water hammer eliminating control method thereof |
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| CN201910712755.7A CN112393469B (en) | 2019-08-02 | 2019-08-02 | Air conditioning unit and water hammer eliminating control method thereof |
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| CN112393469B true CN112393469B (en) | 2022-05-20 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07151395A (en) * | 1993-11-30 | 1995-06-13 | Saginomiya Seisakusho Inc | Injection circuit for refrigerating cycle |
| JP4727523B2 (en) * | 2006-07-26 | 2011-07-20 | 三菱重工業株式会社 | Refrigeration equipment |
| WO2010121614A1 (en) * | 2009-04-01 | 2010-10-28 | Danfoss A/S | A method for operating a valve |
| CN201724340U (en) * | 2010-06-10 | 2011-01-26 | 常州爱斯特空调设备有限公司 | Air-hammer phenomenon prevention device of air conditioner |
| CN201858824U (en) * | 2010-11-04 | 2011-06-08 | 中国第一汽车集团公司 | Closeable electromagnetic expanding valve of double-evaporator air conditioning system |
| CN204176950U (en) * | 2014-10-28 | 2015-02-25 | 南京都乐制冷设备有限公司 | A kind of hot fluorine defrosting refrigerating system reducing absorbing gas belt liquid |
| CN205102447U (en) * | 2015-09-30 | 2016-03-23 | 苏州必信空调有限公司 | Compressor cooling refrigerating system |
| CN106322047B (en) * | 2016-11-07 | 2018-02-06 | 珠海格力电器股份有限公司 | Cooling fan system and its protecting against shock component |
| CN108224828A (en) * | 2018-03-22 | 2018-06-29 | 罗良宜 | A kind of continuous defroster of hot-gas bypass automatic back flow |
| EP3587962B1 (en) * | 2018-06-22 | 2020-12-30 | Danfoss A/S | A method for terminating defrosting of an evaporator by use of air temperature measurements |
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