CN110906591A - Full-liquid-level injection backflow device and method and air conditioner - Google Patents
Full-liquid-level injection backflow device and method and air conditioner Download PDFInfo
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- CN110906591A CN110906591A CN201911065718.8A CN201911065718A CN110906591A CN 110906591 A CN110906591 A CN 110906591A CN 201911065718 A CN201911065718 A CN 201911065718A CN 110906591 A CN110906591 A CN 110906591A
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- 239000007788 liquid Substances 0.000 title claims abstract description 278
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010992 reflux Methods 0.000 claims abstract description 18
- 239000003507 refrigerant Substances 0.000 claims description 43
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 3
- 239000003921 oil Substances 0.000 description 68
- 239000010687 lubricating oil Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid 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
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating 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
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The invention relates to a full liquid level injection reflux device, a method and an air conditioner, wherein the full liquid level injection reflux device comprises: the liquid level sensor, the controller, the driving module and the liquid taking pipe are arranged on the liquid level sensor; the liquid level sensor is arranged in a container filled with liquid and used for detecting the liquid level height value in the container in real time and transmitting the liquid level height value to the controller; the controller can pass through the drive module control according to the liquid level height value in the container the liquid taking pipe carries out linear motion from top to bottom to adjust the liquid taking height of liquid taking pipe. The liquid level sensor is used for detecting the liquid level, the controller controls the driving module to drive the liquid taking pipe to move up and down linearly according to the liquid level height value, and therefore the purpose of adjusting the liquid taking height is achieved.
Description
Technical Field
The invention relates to the technical field of fluid injection, in particular to a full-liquid-level injection backflow device and method and an air conditioner.
Background
At present, energy conservation and environmental protection become imperative social trends, and a flooded evaporator is adopted in a centrifugal water chilling unit to effectively improve the heat exchange efficiency. However, the use of a flooded evaporator also has the problem of oil return, i.e., the lubricating oil enters the evaporator from the exhaust pipe along with the refrigerant. In a flooded evaporator, the refrigerant passes through the shell pass and the chilled water passes through the tube pass. At the moment, the refrigerant is subjected to phase change heat exchange outside the pipe, and a large amount of lubricating oil is accumulated at the bottom of the evaporator after the refrigerant is evaporated, so that the heat exchange of the shell pipe is influenced, the lubricating oil in the compressor is reduced, and the compressor is lack of oil.
The oil return for a centrifugal chiller typically includes two sections, a main return and an auxiliary return. The conventional auxiliary oil return mode of the centrifugal machine is injection oil return, namely fixed-point fixed-height oil return, wherein two liquid taking ports are formed in the wall of an evaporator pipe, one liquid taking port is a high-liquid-level liquid taking port, and the other liquid taking port is a low-liquid-level liquid taking port. Although two liquid taking ports can play the supplementary oil return effect, when the liquid level was got on the liquid mouth to the height, it was the refrigerant mostly that the liquid mouth was got to the low liquid taking, too much refrigerant entered into the oil tank, had both influenced oil return efficiency, caused the compressor to take place the breakdown shutdown because of lacking oil, the refrigerant in the oil tank was low because of pressure when leading to fuel feeding temperature step-down and start again, caused the refrigerant gasification to arouse the foaming phenomenon, brought the compressor cavity with oil and lead to leaking the problem of running oil. When the liquid level is between the high-low liquid taking port, because the injection amount is certain, the high-low liquid taking port can suck gaseous refrigerant, the suction capacity of the compressor can be reduced, the liquid taking amount of the low-low liquid taking port can be influenced, and the injection oil return efficiency is influenced.
As can be seen from the above, the oil return device in the prior art has the following problems:
1. when the oil is injected and returned, liquid is taken from the high/low liquid taking port, and the mixture of the oil and the refrigerant cannot be taken during liquid taking. When the content of lubricating oil in the liquid is low, the oil level of an oil tank of the compressor is gradually reduced to cause the compressor to stop due to oil shortage failure;
2. injecting return oil to suck excessive refrigerants into an oil tank, reducing the pressure of the oil tank when restarting, leading the refrigerants to be gasified to cause foaming phenomenon, leading the oil to be brought into a compressor cavity, and leading the oil to leak from axial seams of the compressor cavity to cause oil leakage;
3. the lubricating oil is accumulated in the evaporator, so that the heat exchange effect of the frozen water and the refrigerant in the evaporator is greatly weakened.
Disclosure of Invention
In view of the above, the present invention provides a full liquid level injection reflux device, a full liquid level injection reflux method and an air conditioner to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a full liquid level draws and penetrates reflux unit, includes:
the liquid level sensor, the controller, the driving module and the liquid taking pipe are arranged on the liquid level sensor;
the liquid level sensor and the driving module are respectively electrically connected with the controller;
the liquid level sensor is arranged in a container filled with liquid and used for detecting the liquid level height value in the container in real time and transmitting the liquid level height value to the controller;
the controller can pass through the drive module control according to the liquid level height value in the container the liquid taking pipe carries out linear motion from top to bottom to adjust the liquid taking height of liquid taking pipe.
Optionally, the driving module includes:
a linear motor and a linkage rod;
the input end of the linear motor is electrically connected with the controller, and the output end of the linear motor is connected with the liquid taking pipe through the linkage rod;
the controller can control the linear motor to drive the liquid taking pipe to do vertical linear motion according to the liquid level height value in the container.
Optionally, a section of telescopic hose is additionally arranged in the middle of the liquid taking pipe.
Optionally, a liquid taking port is arranged at the lower end of the liquid taking pipe.
Optionally, the liquid taking port is a bell mouth.
Optionally, the container is an evaporator; two layers of liquid are filled in the container, and the two layers of liquid are respectively as follows: the liquid refrigerant at the lower layer and the mixed liquid of the refrigerant and the oil at the upper layer.
The invention also provides a full liquid level injection reflux method, which comprises the following steps:
detecting the height value of the liquid level in the container in real time;
determining an adjusting instruction according to the liquid level height value;
and controlling the linear motor to operate according to the adjusting instruction so as to adjust the liquid taking height of a liquid taking pipe connected with the linear motor.
Optionally, the determining an adjustment instruction according to the liquid level height value includes:
when the liquid level height value is larger than the liquid level set value, the liquid level is judged to be high at the moment, and the regulating instruction is to drive the liquid taking port to rise to a specific height;
and when the liquid level height value is smaller than the liquid level set value, the liquid level is determined to be low at the moment, and the adjustment instruction is to drive the liquid taking port to descend to a specific height.
The present invention also provides an air conditioner, comprising:
a full level ejector flow back device as claimed in any preceding claim.
Optionally, the controller is integrated on a control main board of the air conditioner.
Optionally, the container is an evaporator;
two layers of liquid are filled in the evaporator, and the two layers of liquid are respectively as follows: the liquid refrigerant is positioned at the lower layer, and the mixed liquid of the refrigerant and the oil is positioned at the upper layer;
the air conditioner adopts the full liquid level injection backflow method to inject oil return.
By adopting the technical scheme, the full-liquid-level injection reflux device comprises: the liquid level sensor, the controller, the driving module and the liquid taking pipe are arranged on the liquid level sensor; the liquid level sensor and the driving module are respectively electrically connected with the controller; the liquid level sensor is arranged in a container filled with liquid and used for detecting the liquid level height value in the container in real time and transmitting the liquid level height value to the controller; the controller can pass through the drive module control according to the liquid level height value in the container the liquid taking pipe carries out linear motion from top to bottom to adjust the liquid taking height of liquid taking pipe. The liquid level sensor is used for detecting the liquid level, the controller controls the driving module to drive the liquid taking pipe to move up and down linearly according to the liquid level height value, and therefore the purpose of adjusting the liquid taking height is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a first schematic structural view of a full liquid level injection reflux device provided by the present invention;
FIG. 2 is a schematic structural diagram II of a full liquid level injection reflux device provided by the invention;
FIG. 3 is a schematic flow chart of a full liquid level injection reflux method according to the present invention.
In the figure: 1. a liquid level sensor; 2. a controller; 3. a linear motor; 4. a linkage rod; 5. a liquid taking pipe; 6. a flexible hose; 7. an evaporator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a first structural schematic diagram provided by a full-liquid-level injection reflux device.
As shown in fig. 1, the full liquid level ejector reflux device of this embodiment includes:
the liquid level sensor 1, the controller 2, the driving module and the liquid taking pipe 5;
the liquid level sensor 1 and the driving module are respectively electrically connected with the controller 2;
the liquid level sensor 1 is arranged in a container filled with liquid, and the liquid level sensor 1 is used for detecting the liquid level height value in the container in real time and transmitting the liquid level height value to the controller 2;
the controller 2 can control the liquid taking pipe 5 to do vertical linear motion through the driving module according to the liquid level height value in the container so as to adjust the liquid taking height of the liquid taking pipe 5.
Further, the driving module includes:
a linear motor 3 and a linkage rod 4;
the input end of the linear motor 3 is electrically connected with the controller 2, and the output end of the linear motor is connected with the liquid taking pipe 5 through the linkage rod 4;
the controller 2 can control the linear motor 3 to drive the liquid taking pipe 5 to do vertical linear motion according to the liquid level height value in the container.
Furthermore, a section of telescopic hose 6 is additionally arranged in the middle of the liquid taking pipe 5.
Furthermore, a liquid taking port is arranged at the lower end of the liquid taking pipe 5, and the liquid taking port is a horn mouth.
Further, the container is an evaporator 7; two layers of liquid are filled in the container, and the two layers of liquid are respectively as follows: the liquid refrigerant at the lower layer and the mixed liquid of the refrigerant and the oil at the upper layer.
In practical use, the container is taken as an air conditioner evaporator 7 as an example. Two layers of liquid are filled in the evaporator 7, and the two layers of liquid are respectively as follows: a liquid refrigerant in the lower layer, and a mixed liquid (oil-rich refrigerant) of the refrigerant and oil in the upper layer.
As shown in fig. 1, in the first stage, the liquid taking port of the liquid taking pipe 5 is tightly attached to the oil-rich refrigerant, oil return is performed at this time, a mixture of oil and refrigerant can be taken during liquid taking, and the problem that the compressor is stopped due to oil shortage caused by gradual reduction of the oil level of the oil tank of the compressor when the content of lubricating oil in the liquid taking is low is avoided. The first stage shown in fig. 1 is due to the high liquid level in the evaporator 7, when the flexible hose 6 is in a compressed state in the middle of the liquid take-off tube 5.
Along with the continuous operation of air conditioner, the liquid level in the evaporimeter 7 reduces gradually, and this device passes through liquid level inductor 1 carries out real-time detection to the liquid level height value in the evaporimeter 7, and will the liquid level height value send controller 2 to, controller 2 is according to this liquid level height value control linear electric motor 3 operation, linear electric motor 3 operation drives liquid taking pipe 5 carries out rectilinear descending motion to make the liquid taking mouth descend specific height (rich oil refrigerant place height) to guarantee that the liquid taking mouth can get the rich oil refrigerant. As shown in fig. 2, in the second stage, the linear motor 3 operates to drive the liquid taking tube 5 to perform a linear descending motion, and the retractable hose 6 at the middle position of the liquid taking tube 5 is in an extended state.
This embodiment the device utilizes liquid level inductor 1 to carry out liquid level detection to through controller 2 according to liquid level height value control drive module drive liquid taking pipe 5 linear motion about carrying out, increase one section scalable hose 6 in the middle of liquid taking pipe 5, with the purpose of realizing adjusting the liquid height of getting, this embodiment the device can guarantee that liquid taking pipe 5 stops throughout and gets the liquid oil return at suitable height, has improved the efficiency of drawing the oil return greatly, has avoided the compressor to lack oil.
The full-liquid-level injection reflux device is simple in structure and convenient to operate, and the purpose that full-liquid-level oil return can be realized by one liquid taking pipe 5 is structurally achieved; the device can realize accurate oil return, has realized accurate regulation to drawing to penetrate the oil return, has avoided the problem of getting liquid and getting the refrigerant to take place effectively among the prior art, is favorable to guaranteeing that the fuel feeding temperature is stable, prevents to appear the low phenomenon of fuel feeding temperature, solves the oil leakage problem that arouses because of the refrigerant gasification simultaneously, has also avoided because lubricating oil gathers the problem that influences shell and tube heat transfer effect.
It should be noted that all devices or systems based on the principle of adjusting the liquid-taking height for oil return by liquid level detection and mechanically driving the liquid-taking tube are within the protection scope of this patent.
FIG. 3 is a schematic flow chart of a full liquid level injection reflux method according to the present invention.
As shown in fig. 3, the full-liquid-level injection backflow method according to this embodiment includes:
s31: detecting the height value of the liquid level in the container in real time;
further, the real-time detection of the liquid level height value in the container is realized through a liquid level sensor arranged in the container.
S32: determining an adjusting instruction according to the liquid level height value;
further, the determining an adjustment instruction according to the liquid level height value includes:
when the liquid level height value is larger than the liquid level set value, the liquid level is judged to be high at the moment, and the regulating instruction is to drive the liquid taking port to rise to a specific height;
and when the liquid level height value is smaller than the liquid level set value, the liquid level is determined to be low at the moment, and the adjustment instruction is to drive the liquid taking port to descend to a specific height.
S33: and controlling the linear motor to operate according to the adjusting instruction so as to adjust the liquid taking height of a liquid taking pipe connected with the linear motor.
In practical use, the liquid level sensor detects the liquid level in the evaporator in real time, and when the liquid level of a mixture of refrigerant and oil (oil-rich refrigerant) is at a position X, the controller compares the liquid level height value with a preset liquid level set value after receiving the liquid level height value sent by the liquid level sensor, so as to send a signal to the linear motor (linear stepping motor) to control the motion of the linear motor. The step value of the linear motor is calculated according to the following formula:
K＝(X-W)*F
wherein, W is a preset liquid level set value, X is a real-time liquid level height value, F is an adjusting coefficient, and K is a stepping adjusting value of the motor.
As shown in fig. 1, the liquid level in the evaporator is higher, the liquid level detected by the liquid level sensor is recorded as X1, the liquid level sensor sends the liquid level height value X1 to the controller for comparison, and according to the result that K is (X1-W) × F, K is calculated to be a positive value, and the liquid level at this time is determined to be high. The controller sends a signal to the linear stepping motor, so that the output shaft of the motor rotates to drive the liquid taking port to rise to a specific height through the connecting rod, and liquid taking and oil returning are carried out.
As shown in fig. 2, at this time, the liquid level in the evaporator is low, the liquid level height value detected by the liquid level sensor at this time is recorded as X2, the liquid level sensor transmits the liquid level height value X2 to the controller for comparison, and according to the result that K is (X2-W) × F, K is calculated to be a negative value, and the liquid level at this time is determined to be low. The controller sends a signal to the linear stepping motor, so that the output shaft of the motor rotates to drive the liquid taking port to descend to a specific height through the connecting rod, and liquid taking and oil returning are carried out.
It should be noted that, the controller determines the adjustment instruction according to the liquid level height, which is not limited to the above-mentioned manner of comparing the liquid level height with the preset liquid level set value W, as long as it is ensured that the liquid taking port is located in the height range of the rich oil refrigerant at all times, and thus any other control manner that the liquid taking port can take the rich oil refrigerant belongs to the protection scope of this patent.
In the method, the liquid level height value in the container is detected in real time, and an adjusting instruction is determined according to the liquid level height value; and then controlling the linear motor to operate according to the adjusting instruction so as to adjust the liquid taking height of the liquid taking pipe connected with the linear motor, and ensuring that the liquid taking pipe stays at a proper height to take liquid and return oil. The method realizes that the liquid level sensor can detect whether the liquid level in the evaporator is at any height, thereby adjusting the height of the liquid taking port in real time. By the aid of the oil injection and oil return method, the liquid obtained by injecting the oil return can be guaranteed to be rich refrigerant to the greatest extent, and is not gaseous refrigerant above the liquid level or liquid refrigerant below the liquid level, so that the oil injection and oil return efficiency is greatly improved, and oil shortage of the compressor is avoided.
The present invention also provides an embodiment of an air conditioner, including:
the full liquid level ejector reflux device shown in the figure 1 and the figure 2.
Further, the controller is integrated on a control main board of the air conditioner.
Further, the container is an evaporator;
two layers of liquid are filled in the evaporator, and the two layers of liquid are respectively as follows: the liquid refrigerant is positioned at the lower layer, and the mixed liquid of the refrigerant and the oil is positioned at the upper layer;
the air conditioner adopts the method shown in figure 3 to inject oil return.
The air conditioner can realize accurate oil return due to the adoption of the full-liquid-level injection backflow device, realize accurate adjustment on injection oil return, effectively avoid the problem that liquid is taken out of the prior art to obtain a refrigerant, be favorable for ensuring stable oil supply temperature, prevent the phenomenon of low oil supply temperature, solve the problem of oil leakage caused by refrigerant gasification, and avoid the problem that the heat exchange effect of the shell and tube is influenced due to the accumulation of lubricating oil.
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 the terms "first," "second," and the like in the description of the present invention 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 invention, 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 alternate implementations are included within the scope of the preferred embodiment of the present invention 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 invention.
It should be understood that portions of the present invention 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 invention 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, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. 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 invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. The utility model provides a full liquid level draws and penetrates reflux unit which characterized in that includes:
the liquid level sensor, the controller, the driving module and the liquid taking pipe are arranged on the liquid level sensor;
the liquid level sensor and the driving module are respectively electrically connected with the controller;
the liquid level sensor is arranged in a container filled with liquid and used for detecting the liquid level height value in the container in real time and transmitting the liquid level height value to the controller;
the controller can pass through the drive module control according to the liquid level height value in the container the liquid taking pipe carries out linear motion from top to bottom to adjust the liquid taking height of liquid taking pipe.
2. The apparatus of claim 1, wherein the drive module comprises:
a linear motor and a linkage rod;
the input end of the linear motor is electrically connected with the controller, and the output end of the linear motor is connected with the liquid taking pipe through the linkage rod;
the controller can control the linear motor to drive the liquid taking pipe to do vertical linear motion according to the liquid level height value in the container.
3. The device of claim 1, wherein a length of flexible hose is added at the middle of the liquid taking tube.
4. The device of claim 1, wherein a liquid extraction port is provided at a lower end of the liquid extraction tube.
5. The device of claim 4, wherein the liquid extraction port is a flare.
6. The device according to any one of claims 1 to 5, wherein the container is an evaporator; two layers of liquid are filled in the container, and the two layers of liquid are respectively as follows: the liquid refrigerant at the lower layer and the mixed liquid of the refrigerant and the oil at the upper layer.
7. A full liquid level injection reflux method is characterized by comprising the following steps:
detecting the height value of the liquid level in the container in real time;
determining an adjusting instruction according to the liquid level height value;
and controlling the linear motor to operate according to the adjusting instruction so as to adjust the liquid taking height of a liquid taking pipe connected with the linear motor.
8. The method of claim 7, wherein determining an adjustment command based on the liquid level height value comprises:
when the liquid level height value is larger than the liquid level set value, the liquid level is judged to be high at the moment, and the regulating instruction is to drive the liquid taking port to rise to a specific height;
and when the liquid level height value is smaller than the liquid level set value, the liquid level is determined to be low at the moment, and the adjustment instruction is to drive the liquid taking port to descend to a specific height.
9. An air conditioner, comprising:
a full liquid level ejector reflux unit as claimed in any one of claims 1 to 6.
10. The air conditioner of claim 9, wherein the controller is integrated on a control motherboard of the air conditioner.
11. The air conditioner according to claim 9 or 10, wherein the container is an evaporator;
two layers of liquid are filled in the evaporator, and the two layers of liquid are respectively as follows: the liquid refrigerant is positioned at the lower layer, and the mixed liquid of the refrigerant and the oil is positioned at the upper layer;
the air conditioner adopts the method as claimed in claim 7 or 8 to inject oil back.
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| CN201911065718.8A CN110906591A (en) | 2019-11-04 | 2019-11-04 | Full-liquid-level injection backflow device and method and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08226731A (en) * | 1995-02-22 | 1996-09-03 | Hitachi Ltd | Air conditioning equipment |
| CN102679507A (en) * | 2011-03-09 | 2012-09-19 | 三菱电机株式会社 | Air-conditioning apparatus |
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| CN206707913U (en) * | 2017-05-18 | 2017-12-05 | 华北电力大学 | Abandon water depth lift TRT |
| CN109863352A (en) * | 2016-10-31 | 2019-06-07 | 三菱电机株式会社 | Refrigerating circulatory device |
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2019
- 2019-11-04 CN CN201911065718.8A patent/CN110906591A/en active Pending
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|---|---|---|---|---|
| JPH08226731A (en) * | 1995-02-22 | 1996-09-03 | Hitachi Ltd | Air conditioning equipment |
| CN102679507A (en) * | 2011-03-09 | 2012-09-19 | 三菱电机株式会社 | Air-conditioning apparatus |
| CN103047799A (en) * | 2012-12-26 | 2013-04-17 | 上海环球制冷设备有限公司 | Automatic oil returning device of flooded evaporator and utilizing method of automatic oil returning device |
| CN109863352A (en) * | 2016-10-31 | 2019-06-07 | 三菱电机株式会社 | Refrigerating circulatory device |
| CN206707913U (en) * | 2017-05-18 | 2017-12-05 | 华北电力大学 | Abandon water depth lift TRT |
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