CN115031435A - Compressor assembly, air conditioner and control method - Google Patents
Compressor assembly, air conditioner and control method Download PDFInfo
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- CN115031435A CN115031435A CN202210536911.0A CN202210536911A CN115031435A CN 115031435 A CN115031435 A CN 115031435A CN 202210536911 A CN202210536911 A CN 202210536911A CN 115031435 A CN115031435 A CN 115031435A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 266
- 239000003507 refrigerant Substances 0.000 claims abstract description 225
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 230000000903 blocking effect Effects 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 20
- 239000013589 supplement Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002699 waste material Substances 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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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
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compressor (AREA)
Abstract
The invention provides a compressor assembly, an air conditioner and a control method, wherein the compressor assembly comprises a compressor and a refrigerant pipe, and the outlet end of the refrigerant pipe is connected with the compressor; the inlet end of the refrigerant pipe is arranged in the liquid storage tank, and the liquid storage tank is provided with a limiting liquid level which is not higher than the inlet end of the refrigerant pipe; the first detection piece is used for detecting the liquid level condition in the liquid storage tank, and controlling the liquid refrigerant in the liquid storage tank to be discharged when the first detection piece detects that the liquid level in the liquid storage tank reaches the limiting liquid level. Through the technical scheme provided by the invention, the technical problem that the chamber of the hydraulic compressor is easy to hit in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a compressor assembly, an air conditioner and a control method.
Background
At present, in the air conditioning system in the prior art, the filling amount of the refrigerant of the compressor determines a cooling capacity range and a heating capacity range of the operation of the compressor to a certain extent. During the operation of the compressor system, the compressor system can be in a normal operation mode only when the refrigerant quantity of the compressor system is matched with the operation load.
However, when the refrigerating margin in the compressor system is too much, that is, when the indoor load is small, the amount of liquid stored in the liquid storage tank of the compressor is large, and the amount of liquid in the liquid storage tank may enter the compressor, so that the danger of liquid impact on the chamber of the compressor occurs, which is not favorable for the normal operation of the compressor and brings certain damage to the compressor.
Disclosure of Invention
The invention mainly aims to provide a compressor assembly, an air conditioner and a control method, and aims to solve the technical problem that liquid impact on a compressor chamber is easy to occur in the prior art.
To achieve the above object, according to one aspect of the present invention, there is provided a compressor assembly including: the outlet end of the refrigerant pipe is connected with the compressor; the inlet end of the refrigerant pipe is arranged in the liquid storage tank, and the liquid storage tank is provided with a limiting liquid level which is not higher than the inlet end of the refrigerant pipe; the first detection piece is used for detecting the liquid level condition in the liquid storage tank, and controlling the liquid refrigerant in the liquid storage tank to be discharged when the first detection piece detects that the liquid level in the liquid storage tank reaches the limiting liquid level.
Further, the compressor assembly further includes: the buffer storage part is provided with a buffer storage cavity which is used for being connected with the liquid storage tank so as to control the liquid refrigerant in the liquid storage tank to be discharged into the buffer storage cavity when the liquid refrigerant in the liquid storage tank reaches the limiting liquid surface.
Further, the compressor assembly further includes: the first flow control valve is arranged between the cache inlet of the cache piece and the liquid storage tank; the control part, the first flow control valve and the first detection part are connected with the control part, so that the control part controls the first flow control valve according to a signal detected by the first detection part.
Further, the compressor assembly further includes: the compressor, the liquid storage tank and the cache component are all connected through the refrigerant circulation pipeline; and the second detection part is used for detecting the refrigerant circulation quantity in the refrigerant circulation pipeline so as to control whether the cache part supplements the refrigerant in the refrigerant circulation pipeline or not according to the refrigerant circulation quantity in the refrigerant circulation pipeline.
Furthermore, the second detection piece is a temperature detection piece, and at least part of the temperature detection piece is arranged at an exhaust port of the compressor so as to detect the refrigerant circulation quantity in the refrigerant circulation pipeline through a temperature signal detected by the temperature detection piece.
Further, the compressor assembly further includes: the second flow control valve is arranged on the refrigerant circulating pipeline and is positioned at the cache outlet of the cache part; the second flow control valve and the second detection piece are both connected with the control piece, so that the control piece controls the second flow control valve according to a signal detected by the second detection piece.
Further, the compressor assembly further includes: the blocking piece is movably arranged in the liquid storage tank and is provided with a blocking position for blocking the inlet end of the refrigerant pipe and an avoiding position for avoiding the inlet end of the refrigerant pipe; when the liquid level in the liquid storage tank is not higher than the limiting liquid level, the plugging piece is in an avoiding position; when the liquid level in the liquid storage tank is higher than the limiting liquid level, the plugging piece is located at the plugging position.
Further, the first detection piece is a current detection piece, and the current detection piece is connected with the compressor to determine whether the liquid level in the liquid storage tank reaches the limiting liquid level by detecting the load current of the compressor.
Furthermore, the liquid storage tank is provided with a refrigerant inlet, and the plugging piece is arranged opposite to the refrigerant inlet; when the liquid level in the liquid storage tank is higher than the limiting liquid level, the plugging piece moves to the plugging position under the high-pressure action of the refrigerant at the refrigerant inlet.
Further, the compressor assembly further includes: the piece that resets sets up between shutoff piece and the liquid storage pot to make the shutoff piece reset under the effect of the piece that resets.
Furthermore, the reset piece is a spring, one end of the spring is connected with the plugging piece, the other end of the spring is connected with the liquid storage tank, the original length of the spring is L, the distance between a refrigerant inlet of the liquid storage tank and the inlet end of the refrigerant pipe is X, the height of the plugging piece is Y, the inner diameter of the plugging piece is R, the outer diameter of the refrigerant pipe is R, the density of the refrigerant is p, the elastic coefficient of the spring is k, and the liquid level height of the liquid storage tank is h; wherein Pgh × π (R) 2 -r 2 )≥k(L-X)。
Furthermore, the plugging piece is a plugging cover which is arranged at the inlet end of the refrigerant pipe; and/or, the compressor assembly also comprises a sealing element which is arranged at the inlet end of the refrigerant pipe; when the plugging piece is in the plugging position, the sealing piece is positioned between the plugging piece and the refrigerant pipe.
According to another aspect of the present invention, there is provided an air conditioner including the compressor assembly provided above.
According to another aspect of the present invention, there is provided a control method for controlling operation of the compressor assembly provided above; the control method comprises the following steps: acquiring a starting signal, and starting a compressor of the compressor assembly according to the starting signal; when the first detection piece of the compressor assembly detects that the liquid level in the liquid storage tank of the compressor assembly reaches the limiting liquid level of the liquid storage tank, the liquid storage tank is controlled to discharge liquid refrigerant.
Further, the compressor assembly is the compressor assembly provided above, and the control method includes: when the first detection part detects that the liquid level in the liquid storage tank reaches the limiting liquid level, controlling the liquid refrigerant in the liquid storage tank to be discharged into the cache part of the compressor assembly; when the second detection piece detects that the refrigerant circulation quantity of the refrigerant circulation pipeline of the compressor assembly is lower than the preset refrigerant circulation quantity, the refrigerant in the cache piece is controlled to be discharged into the refrigerant circulation pipeline.
Further, the method for controlling the liquid refrigerant in the liquid storage tank to be discharged into the cache component of the compressor assembly comprises the following steps: and controlling the first flow control valve to open, and closing the first flow control valve within a first preset time after the first flow control valve is opened.
Further, the compressor assembly is the above-mentioned compressor assembly provided, and the method for controlling the refrigerant in the buffer memory member to be discharged into the refrigerant circulation pipeline includes: and controlling the opening of the second flow control valve, and closing the second flow control valve within a second preset time after the second flow control valve is opened.
By applying the technical scheme of the invention, when the first detection part detects that the liquid level in the liquid storage tank reaches the limiting liquid level, the liquid refrigerant in the liquid storage tank is controlled to be discharged so that the liquid level in the liquid storage tank is lower than the limiting liquid level, thereby preventing the liquid in the liquid storage tank from entering the compressor through the inlet end of the refrigerant pipe, further avoiding the situation that the liquid refrigerant enters the compressor to cause liquid impact on a cavity of the compressor, and being beneficial to prolonging the service life of the compressor. When the liquid level in the liquid storage tank is not higher than the limiting liquid level, the blocking piece is located at the avoiding position, so that a gaseous refrigerant can smoothly enter the compressor through the refrigerant pipe to run, and the compressor is in a normal running state; when the liquid level in the liquid storage tank is higher than the limiting liquid level, the plugging piece is located at the plugging position, a liquid refrigerant can be prevented from entering the compressor through the refrigerant pipe, the condition that the compressor is impacted by the liquid is effectively avoided, the compressor is effectively protected conveniently, and the service life of the compressor is prolonged. In addition, the adaptive range of refrigerating and heating capacities of the compressor assembly can be enlarged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 illustrates a schematic diagram of the operation of a compressor assembly provided in accordance with an embodiment of the present invention;
FIG. 2 illustrates a schematic structural diagram of a compressor assembly provided in accordance with an embodiment of the present invention;
FIG. 3 illustrates an exploded view of a fluid reservoir provided in accordance with an embodiment of the present invention;
FIG. 4 illustrates a cross-sectional view of a fluid reservoir provided in accordance with an embodiment of the present invention;
fig. 5 is a schematic structural view illustrating an inlet end of a refrigerant pipe according to an embodiment of the present invention;
figure 6 shows a schematic structural view of a closure member provided according to an embodiment of the invention in the closed position;
FIG. 7 shows an enlarged view of the layout of FIG. 6;
figure 8 shows a schematic structural view of a closure member according to an embodiment of the invention in an avoidance position;
fig. 9 is a control flow diagram illustrating a control method according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a compressor; 20. a refrigerant pipe; 30. a liquid storage tank; 31. a refrigerant inlet; 32. a can lid; 33. a tank body; 34. a base; 40. a caching component; 51. a first flow control valve; 52. a second flow control valve; 60. a refrigerant circulation line; 70. a blocking piece; 80. a reset member; 90. a seal member; 100. an evaporator; 110. a condenser; 120. and (3) a filter.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 8, according to a first embodiment of the present invention, there is provided a compressor assembly, which includes a compressor 10, a refrigerant pipe 20, a liquid storage tank 30, and a first detection member, wherein an outlet end of the refrigerant pipe 20 is connected to the compressor 10, an inlet end of the refrigerant pipe 20 is installed in the liquid storage tank 30, and the liquid storage tank 30 has a limiting liquid level, which is not higher than the inlet end of the refrigerant pipe 20; the first detecting element is used for detecting the liquid level condition in the liquid storage tank 30, so that when the first detecting element detects that the liquid level in the liquid storage tank 30 reaches the limiting liquid level, the liquid refrigerant in the liquid storage tank 30 is controlled to be discharged.
Adopt the compressor unit that this embodiment provided, can be convenient for accurately detect the liquid level condition in the liquid storage pot 30 through first detection piece, when first detection piece detected the liquid level in the liquid storage pot 30 and reachd spacing liquid level, the liquid refrigerant in the control liquid storage pot 30 is discharged so that the liquid level in the liquid storage pot 30 is less than spacing liquid level, thereby avoid liquid in the liquid storage pot 30 to get into in the compressor 10 through the entrance point of refrigerant pipe 20, and then avoided the liquid refrigerant to get into the condition that causes the liquid to hit the cavity of compressor 10 in the compressor 10, thereby can be convenient for effectively protect compressor 10, be favorable to improving the working life of compressor 10. Therefore, through the compressor assembly provided by the embodiment, the technical problem that the chamber of the liquid impact compressor 10 is easy to occur in the prior art can be solved.
Specifically, the first detection member may be a liquid level detection member disposed in the liquid storage tank 30 to detect the liquid level in the liquid storage tank 30 in real time through the liquid level detection member, so as to determine whether the liquid level in the liquid storage tank 30 reaches the limit liquid level through a detection result of the first detection member.
In this embodiment, the compressor assembly further includes a buffer member 40, the buffer member 40 has a buffer cavity, and the buffer cavity is used for connecting with the liquid storage tank 30, so as to control the liquid refrigerant in the liquid storage tank 30 to be discharged into the buffer cavity when the liquid refrigerant in the liquid storage tank 30 reaches the limit liquid level. By adopting the structure, the liquid discharged from the liquid storage tank 30 can be conveniently stored through the buffer cavity, so that the liquid level in the liquid storage tank 30 is lower than the limit liquid level, the situation that the liquid in the liquid storage tank 30 enters the cavity of the compressor 10 through the inlet end of the refrigerant pipe 20 can be effectively avoided, and the refrigerant waste can also be avoided.
Specifically, the compressor assembly of this embodiment further includes a first flow control valve 51 and a control member, the first flow control valve being disposed between the buffer inlet of the buffer member 40 and the reservoir 30. The first flow control valve 51 and the first sensing member are connected to a control member so that the control member controls the first flow control valve 51 according to a signal sensed by the first sensing member. By adopting the structure, when the liquid level in the liquid storage tank 30 reaches the limit liquid level, the first flow valve is controlled to be opened to discharge the liquid refrigerant in the liquid storage tank 30 into the buffer cavity of the buffer member 40, so that the liquid refrigerant in the liquid storage tank 30 exceeding the limit liquid level is prevented from entering the cavity of the compressor 10 through the inlet end of the refrigerant pipe 20. Specifically, the first flow rate control valve 51 in the present embodiment may be of an electromagnetic valve structure.
In this embodiment, the compressor assembly further includes a refrigerant circulation pipeline 60 and a second detection element, and the compressor 10, the liquid storage tank 30 and the buffer element 40 are all connected through the refrigerant circulation pipeline 60. The second detecting element is used for detecting the refrigerant circulation amount in the refrigerant circulation pipeline 60, so as to control whether the cache element 40 supplements the refrigerant in the refrigerant circulation pipeline 60 or not according to the refrigerant circulation amount in the refrigerant circulation pipeline 60. By adopting the structure, when the second detection part detects that the refrigerant circulation volume in the refrigerant circulation pipeline 60 is lower than the preset refrigerant circulation volume, the refrigerant volume can be supplemented into the refrigerant circulation pipeline 60 through the cache part 40, so that the compressor assembly can meet the heat exchange requirement.
Specifically, the second detecting element may be a flow detecting element, and a detecting portion of the flow detecting element is located in the refrigerant circulation pipeline 60 to detect the refrigerant flow in the refrigerant circulation pipeline 60.
In this embodiment, the second detecting element is a temperature detecting element, and at least a portion of the temperature detecting element is disposed at an exhaust port of the compressor 10, so as to detect a refrigerant circulation amount in the refrigerant circulation pipeline 60 by a temperature signal detected by the temperature detecting element. By adopting the structure, the second detection piece is simple to install and convenient to detach and maintain. In addition, when the amount of refrigerant in the refrigerant circulation line 60 is lower than the preset amount of refrigerant to be circulated, the indoor side load increases, the frequency of the compressor 10 increases, and the discharge temperature of the compressor 10 increases, so that it is convenient to quickly determine whether the amount of refrigerant in the refrigerant circulation line 60 is too low by detecting the discharge temperature of the compressor 10.
Specifically, the compressor assembly in this embodiment further includes a second flow control valve 52, the second flow control valve 52 is disposed on the refrigerant circulation pipeline 60, and the second flow control valve 52 is located at the buffer outlet of the buffer component 40. The second flow control valve 52 and the second detecting element are both connected to the control element, so that the control element controls the second flow control valve 52 according to a signal detected by the second detecting element. With the arrangement, when the refrigerant quantity of the refrigerant circulation pipeline 60 is too low, the refrigerant in the cache component 40 flows into the refrigerant pipeline 20 through the cache outlet, so as to supplement the refrigerant quantity in the refrigerant pipeline 20, and therefore the refrigerant quantity in the refrigerant circulation pipeline 60 can meet the use requirement. Specifically, the second flow rate control valve 52 in the present embodiment may be of a solenoid valve structure.
In this embodiment, the compressor assembly further comprises a blocking member 70, the blocking member 70 being movably arranged in the reservoir 30, the blocking member 70 having a blocking position for blocking the inlet end of the refrigerant pipe 20 and an escape position for avoiding the inlet end of the refrigerant pipe 20. When the liquid level in the liquid storage tank 30 is not higher than the limiting liquid level, the plugging member 70 is in an avoiding position; when the liquid level in the liquid storage tank 30 is higher than the limiting liquid level, the plugging piece 70 is in the plugging position. By adopting the structure, the plugging piece 70 can be arranged, so that the plugging piece 70 can better plug the inlet end of the refrigerant pipe 20 when the liquid level in the liquid storage tank 30 is higher than the limiting liquid level, and further the liquid in the liquid storage tank 30 is better prevented from entering the cavity of the compressor 10 through the inlet end of the refrigerant pipe 20.
In particular, a drive element can be provided, which controls the movement of the blocking element 70 into the blocking position or into the avoidance position as a function of the signal detected by the first detection element.
Specifically, the first detecting element in this embodiment is a current detecting element, and the current detecting element is connected to the compressor 10 to determine whether the liquid level in the liquid storage tank 30 reaches the limit liquid level by detecting the load current of the compressor 10. With such a configuration, when the liquid level of the liquid refrigerant in the liquid storage tank 30 rises to the limit liquid level, the plugging member 70 plugs the inlet end of the refrigerant pipe 20, and at this time, as the compressor 10 operates, the vacuum degree in the refrigerant pipe 20 rises, so that the load of the compressor 10 increases, and the current increases, thereby triggering the current protection of the compressor 10. Therefore, whether the refrigerant in the accumulator 30 is discharged or not can be controlled by the current signal detected by the current detector with respect to the current of the compressor 10.
In the present embodiment, the liquid storage tank 30 has a refrigerant inlet 31, and the blocking member 70 is disposed opposite to the refrigerant inlet 31; wherein, when the liquid level in the liquid storage tank 30 is higher than the limit liquid level, the plugging member 70 is moved to the plugging position under the high pressure of the refrigerant at the refrigerant inlet 31. By adopting the structure, the structure can be simplified, the high-pressure refrigerant at the refrigerant inlet 31 is utilized to push the plugging piece 70 to move to the plugging position, and no additional structure is required to be arranged. Specifically, when the liquid refrigerant in the receiver 30 rises to the limiting liquid level, the gas space in the receiver 30 is reduced, especially the gas below the plugging member 70 is reduced, so that the plugging member 70 can be moved to the plugging position smoothly under the high pressure of the refrigerant at the refrigerant inlet 31.
Specifically, the compressor assembly of the present embodiment further includes a resetting member 80, and the resetting member 80 is disposed between the blocking member 70 and the reservoir tank 30 to reset the blocking member 70 under the action of the resetting member 80. By adopting the structure, the liquid level in the liquid storage tank 30 can be conveniently lowered to the limit liquid level, and then the plugging piece 70 moves to the avoiding position, so that the gaseous refrigerant is conveniently introduced into the inlet end of the refrigerant pipe 20.
In this embodiment, the restoring member 80 is a spring, one end of the spring is connected to the blocking member 70, the other end of the spring is connected to the liquid storage tank 30, the original length of the spring is L, the distance between the refrigerant inlet 31 of the liquid storage tank 30 and the inlet end of the refrigerant pipe 20 is X, the height of the blocking member 70 is Y, the inner diameter of the blocking member 70 is R, the outer diameter of the refrigerant pipe 20 is R, the density of the refrigerant is p, the elastic coefficient of the spring is k, and the liquid level height of the liquid storage tank 30 is h; wherein, pgh is multiplied by pi (R) 2 -r 2 ) K is more than or equal to k (L-X). By adopting the structure, when the liquid level of the liquid storage tank 30 reaches the limiting liquid level, the plugging piece 70 can move to the plugging position smoothly, and the plugging stability of the plugging piece 70 to the inlet end of the refrigerant pipe 20 is improved.
Specifically, the blocking member 70 may be a blocking cover provided at the inlet end of the refrigerant pipe 20. Alternatively, the compressor assembly further includes a sealing member 90, the sealing member 90 being disposed at an inlet end of the refrigerant pipe 20; when the block piece 70 is in the blocking position, the sealing member 90 is located between the block piece 70 and the refrigerant pipe 20. Alternatively, the plugging member 70 may be a plugging cover, and the plugging cover is disposed at the inlet end of the refrigerant pipe 20; the compressor 10 further includes a sealing member 90, the sealing member 90 being disposed at an inlet end of the refrigerant pipe 20; when the block piece 70 is in the blocking position, the sealing member 90 is located between the block piece 70 and the refrigerant tube 20.
In this embodiment, the plugging member 70 may be a plugging cover, and the plugging cover is disposed at the inlet end of the refrigerant pipe 20 to improve the stability of plugging. The compressor 10 in this embodiment further includes a sealing member 90, where the sealing member 90 is disposed at an inlet end of the refrigerant pipe 20; when the plugging piece 70 is at the plugging position, the sealing member 90 is located between the plugging piece 70 and the rear refrigerant pipe 20 to further improve the sealing performance of plugging and effectively ensure the plugging effect.
The invention provides an air conditioning system which has a wide adaptive range of refrigerating/heating capacity and simultaneously protects a compressor 10 from being hit by liquid, and an implementation mode. A physical liquid level control device is arranged in a liquid storage of the compressor 10, and when the liquid level reaches a certain value, the stop block descends to stop liquid from entering a refrigerant inlet of the compressor 10; the refrigerant storage pipeline is designed and mainly comprises two electromagnetic valves and a storage device; a control mode is designed, an air conditioning system and a liquid level control device in the liquid storage tank 30 are combined, the opening and closing of a refrigerant storage pipeline are controlled, and the storage and the release of refrigerants are realized.
When the refrigerant filling amount of the air conditioning system is too large, the system can judge that the liquid level of the liquid storage tank 30 is too high in time and control the other flow path to store the refrigerant. When the amount of refrigerant filled into the air conditioning system is too small, the system can judge that the exhaust temperature of the compressor 10 is too high in time and control the other flow path to release the added refrigerant.
The invention mainly comprises two parts: the compressor 10, the refrigerant pipe 20, the liquid storage tank 30 and the buffer member 40 are shown in fig. 1 and 2. The principle of air conditioning cooling/heating is shown in fig. 1, and in the current air conditioning system, no matter the flow direction of the cooling refrigerant or the flow direction of the heating refrigerant, the cooling refrigerant passes through the liquid storage tank 30 and then reaches the compressor 10. The liquid storage tank 30 includes a tank cover 32, a spring, a blocking member 70, a sealing member 90 (in this embodiment, the sealing member 90 may be a sealing rubber ring), a tank body 33 and a base 34, the sealing rubber ring is attached to an inlet of the refrigerant pipe 20, the spring is connected to the tank cover 32 and the blocking member 70, the buffer member 40 includes a storage tank, and both the first flow control valve 51 and the second flow control valve 52 may be solenoid valves. Reservoir 30 sizing: the distance from the top of the tank cover 32 to the sealing element 90 at the inlet end of the refrigerant pipe 20 is X (the top of the tank cover 32 can correspond to the refrigerant inlet 31; when the sealing element 90 is arranged at the inlet end of the refrigerant pipe 20, X is the distance from the top of the tank cover 32 to the sealing element 90 at the inlet end of the refrigerant pipe 20), the original length of the spring is L, the height of the stopper cover is Y, the inner diameter of the stopper is R, the outer diameter of the refrigerant pipe 20 is R, the density of the liquid refrigerant is P, the design combination control principle Pgh X pi is not less than k, wherein P, g, pi, k are known, and h, R, R and L are combined with known designs.
Specifically, the buffer member 40 in this embodiment may be replaced by a capillary tube, so as to exchange heat with a heat source such as the compressor 10 and reduce the temperature of the compression cavity. The blocking member 70 may be a stopper, and the stopper may be raised by the refrigerant fluid to block the refrigerant inlet 31 of the receiver 30.
The second embodiment of the invention provides an air conditioner, and the air conditioner comprises the compressor assembly provided by the second embodiment. The air conditioner in this embodiment includes a heat exchange cycle system including an evaporator 100, a condenser 110, a compressor assembly, and a filter 120.
As shown in fig. 9, the third embodiment of the present invention provides a control method for controlling the operation of the compressor assembly provided in the above-described embodiment. The control method comprises the following steps: acquiring a starting signal, and starting a compressor 10 of the compressor assembly according to the starting signal; when the first detection member of the compressor assembly detects that the liquid level in the liquid storage tank 30 of the compressor assembly reaches the limiting liquid level of the liquid storage tank 30, the liquid storage tank 30 is controlled to discharge liquid refrigerant. By adopting the method, the liquid level condition of the liquid refrigerant in the liquid storage tank 30 can be conveniently and accurately detected, and when the liquid level reaches the limit liquid level, the liquid refrigerant is controlled to be discharged from the liquid storage tank 30, so that the condition that the liquid refrigerant flows into the cavity of the compressor 10 from the inlet end of the refrigerant pipe 20 after exceeding the limit liquid level is avoided, and the compressor 10 is conveniently protected.
In this embodiment, the compressor assembly is the above compressor assembly, and the control method includes: when the first detection part detects that the liquid level in the liquid storage tank 30 reaches the limiting liquid level, the liquid refrigerant in the liquid storage tank 30 is controlled to be discharged into the cache part 40 of the compressor component; when the second detection part detects that the refrigerant circulation amount of the refrigerant circulation pipeline 60 of the compressor assembly is lower than the preset refrigerant circulation amount, the refrigerant in the cache part 40 is controlled to be discharged into the refrigerant circulation pipeline 60. In this way, it is convenient to control the buffering of the buffering member 40 according to the signals detected by the first and second detecting members, so that the compressor 10 can maintain a stable operation state.
Specifically, in the present embodiment, the method for controlling the liquid refrigerant in the liquid storage tank 30 to be discharged into the buffer element 40 of the compressor assembly includes: the first flow control valve 51 is controlled to be opened and the first flow control valve 51 is closed within a first preset time after the first flow control valve 51 is opened. In this manner, the first flow control valve 51 can be easily controlled according to the liquid level in the reservoir tank 30. Specifically, the first preset time may be calculated according to a specific operation condition of the compressor 10, or set to about 2 min.
In this embodiment, the method for controlling the refrigerant in the buffer component 40 to be discharged into the refrigerant circulation pipeline 60 by the compressor component is as follows: the second flow control valve 52 is controlled to be opened, and the second flow control valve 52 is closed within a second preset time after the second flow control valve 52 is opened. By adopting the method, the second flow control valve 52 can be conveniently controlled according to the condition of the refrigerant circulation quantity in the refrigerant connecting pipe, so that the refrigerant circulation quantity can be ensured to meet the circulation requirement. Specifically, the second preset time may be calculated according to a specific operation condition of the compressor 10, or set to about 2 min.
By adopting the control method provided by the embodiment, the operation amount of the refrigerant in the refrigerant connecting pipeline of the compressor assembly can be conveniently adjusted, so that the operation amount of the refrigerant can be matched with the load of the compressor 10, the condition that the operation amount of the refrigerant is too much or too little is avoided, the operation amount of the refrigerant is maintained in a normal range, and the compressor 10 can conveniently work normally.
During the refrigerating/heating operation, when the refrigerant quantity of the compressor assembly during the operation is excessive, the liquid in the liquid storage tank 30 rises, when the liquid rises to a certain value, the pgh multiplied by pi is larger than or equal to k, the stop block descends to block the inlet end of the refrigerant pipe 20, at the moment, the vacuum degree rises due to the operation of the compressor 10 in the refrigerant pipe 20, the load of the compressor 10 is increased, the current is increased, and the current protection of the compressor 10 is triggered. The current protection signal is transmitted to the driver to open the first flow control valve 51 of the storage pipeline part, and redundant refrigerant flows into the accumulator to be stored.
During the cooling/heating operation, when the refrigerant quantity is too small during the operation of the compressor assembly, the indoor side load is increased, the frequency of the compressor 10 is increased, the exhaust temperature frequency limiting signal is triggered, and the frequency of the compressor 10 cannot be increased. Then, the signal is transmitted to the driver to open the second flow control valve 52 of the storage pipe unit, and the stored refrigerant flows out to the system pipe, thereby improving the capacity to match the indoor load.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the refrigerating and heating capacities have a wide adaptive range and simultaneously protect the compressor from being hit by liquid.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. A compressor assembly, comprising:
the compressor comprises a compressor (10) and a refrigerant pipe (20), wherein the outlet end of the refrigerant pipe (20) is connected with the compressor (10);
the liquid storage tank (30) is provided with a limiting liquid level, and the limiting liquid level is not higher than the inlet end of the refrigerant pipe (20);
the first detection part is used for detecting the liquid level condition in the liquid storage tank (30) so as to control the liquid refrigerant in the liquid storage tank (30) to be discharged when the first detection part detects that the liquid level in the liquid storage tank (30) reaches the limiting liquid level.
2. The compressor assembly of claim 1, further comprising:
the buffer storage piece (40), the buffer storage piece (40) has the buffer storage chamber, the buffer storage chamber is used for being connected with the liquid storage pot (30) to when the liquid refrigerant in the liquid storage pot (30) reaches the spacing liquid level, control the liquid refrigerant in the liquid storage pot (30) discharge to in the buffer storage chamber.
3. The compressor assembly of claim 2, further comprising:
the first flow control valve (51) is arranged between the buffer inlet of the buffer part (40) and the liquid storage tank (30);
the control part is connected with the first flow control valve (51) and the first detection part, so that the control part controls the first flow control valve (51) according to the signal detected by the first detection part.
4. The compressor assembly of claim 3, further comprising:
the compressor (10), the liquid storage tank (30) and the cache piece (40) are all connected through the refrigerant circulating pipeline (60);
the second detection part is used for detecting the refrigerant circulation quantity in the refrigerant circulation pipeline (60) so as to control whether the cache part (40) supplements the refrigerant in the refrigerant circulation pipeline (60) or not according to the refrigerant circulation quantity in the refrigerant circulation pipeline (60).
5. The compressor assembly according to claim 4, wherein the second detecting member is a temperature detecting member, and at least a portion of the temperature detecting member is disposed at an exhaust port of the compressor (10) to detect a refrigerant circulation amount in the refrigerant circulation line (60) by a temperature signal detected by the temperature detecting member.
6. The compressor assembly of claim 4, further comprising:
the second flow control valve (52) is arranged on the refrigerant circulating pipeline (60), and the second flow control valve (52) is positioned at a cache outlet of the cache part (40);
wherein the second flow control valve (52) and the second detecting element are both connected with the control element, so that the control element controls the second flow control valve (52) according to the signal detected by the second detecting element.
7. The compressor assembly of claim 1, further comprising:
the blocking piece (70) is movably arranged in the liquid storage tank (30), and the blocking piece (70) is provided with a blocking position for blocking the inlet end of the refrigerant pipe (20) and an avoiding position for avoiding the inlet end of the refrigerant pipe (20); when the liquid level in the liquid storage tank (30) is not higher than the limiting liquid level, the blocking piece (70) is positioned at the avoiding position; when the liquid level in the liquid storage tank (30) is higher than the limiting liquid level, the plugging piece (70) is in the plugging position.
8. The compressor assembly of claim 7, wherein the first sensing member is a current sensing member connected to the compressor (10) to determine whether the liquid level in the liquid storage tank (30) reaches a limit liquid level by sensing a load current of the compressor (10).
9. The compressor assembly of claim 7, wherein the reservoir (30) has a refrigerant inlet (31), the closure (70) being disposed opposite the refrigerant inlet (31); when the liquid level in the liquid storage tank (30) is higher than the limiting liquid level, the plugging piece (70) is moved to the plugging position under the high-pressure action of the refrigerant at the refrigerant inlet (31).
10. The compressor assembly of claim 7, further comprising:
the resetting piece (80) is arranged between the blocking piece (70) and the liquid storage tank (30) so as to reset the blocking piece (70) under the action of the resetting piece (80).
11. The compressor assembly according to claim 10, wherein the restoring member (80) is a spring, one end of the spring is connected to the blocking member (70), the other end of the spring is connected to the liquid storage tank (30), the original length of the spring is L, the distance between the refrigerant inlet (31) of the liquid storage tank (30) and the inlet end of the refrigerant pipe (20) is X, the height of the blocking member (70) is Y, the inner diameter of the blocking member (70) is R, the outer diameter of the refrigerant pipe (20) is R, the density of the refrigerant is P, the elastic coefficient of the spring is k, and the liquid level height of the liquid storage tank (30) is h;
wherein Pgh × π (R) 2 -r 2 )≥k(L-X)。
12. Compressor assembly according to one of the claims 7 to 11,
the blocking piece (70) is a blocking cover which is arranged at the inlet end of the refrigerant pipe (20); and/or the presence of a gas in the gas,
the compressor assembly further comprises a seal (90), the seal (90) being disposed at an inlet end of the refrigerant tube (20); when the block piece (70) is in the blocking position, the sealing piece (90) is positioned between the block piece (70) and the refrigerant pipe (20).
13. An air conditioner characterized in that it comprises a compressor assembly according to any one of claims 1 to 12.
14. A control method for controlling the operation of a compressor assembly according to any one of claims 1 to 12; the control method comprises the following steps:
acquiring a starting signal, and starting a compressor of the compressor assembly according to the starting signal;
when the first detection piece of the compressor assembly detects that the liquid level in the liquid storage tank of the compressor assembly reaches the limiting liquid level of the liquid storage tank, the liquid storage tank is controlled to discharge liquid refrigerant.
15. The control method of claim 14, wherein the compressor assembly is the compressor assembly of claim 5, the control method comprising:
when the first detection piece detects that the liquid level in the liquid storage tank reaches the limiting liquid level, controlling the liquid refrigerant in the liquid storage tank to be discharged into the cache piece of the compressor assembly;
when the second detection piece of the compressor assembly detects that the refrigerant circulation quantity of the refrigerant circulation pipeline of the compressor assembly is lower than the preset refrigerant circulation quantity, the refrigerant in the cache piece is controlled to be discharged into the refrigerant circulation pipeline.
16. The method as claimed in claim 15, wherein the method for controlling the discharge of the liquid refrigerant in the liquid storage tank into the buffer member of the compressor assembly comprises:
controlling a first flow control valve of the compressor assembly to open, and closing the first flow control valve within a first preset time after the first flow control valve is opened.
17. The method as claimed in claim 15, wherein the compressor assembly is the compressor assembly as claimed in claim 7, and the method for controlling the refrigerant in the buffer member to be discharged into the refrigerant circulation pipeline includes:
and controlling a second flow control valve of the compressor assembly to be opened, and closing the second flow control valve within a second preset time after the second flow control valve is opened.
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| CN202210536911.0A CN115031435A (en) | 2022-05-17 | 2022-05-17 | Compressor assembly, air conditioner and control method |
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| CN202210536911.0A CN115031435A (en) | 2022-05-17 | 2022-05-17 | Compressor assembly, air conditioner and control method |
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| CN114165951A (en) * | 2021-11-22 | 2022-03-11 | 江苏润华膜业科技有限公司 | Low-pressure circulating barrel |
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| JPS6325462A (en) * | 1986-07-16 | 1988-02-02 | 三菱電機株式会社 | Air conditioner |
| CN105637304A (en) * | 2013-10-07 | 2016-06-01 | 大金工业株式会社 | Refrigeration device |
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Application publication date: 20220909 |