CN109237676B - Variable-capacity air conditioner and variable-capacity control method thereof - Google Patents
Variable-capacity air conditioner and variable-capacity control method thereof Download PDFInfo
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- CN109237676B CN109237676B CN201811127674.2A CN201811127674A CN109237676B CN 109237676 B CN109237676 B CN 109237676B CN 201811127674 A CN201811127674 A CN 201811127674A CN 109237676 B CN109237676 B CN 109237676B
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
Abstract
The invention relates to a variable-capacity air conditioner and a variable-capacity control method thereof. Wherein, varactor air conditioner includes: the compressor comprises at least two cylinder bodies and variable-capacity ports, wherein the variable-capacity ports are used for selectively supplying gas to the switching position of at least one cylinder body so as to enable the cylinder body to be alternately switched between an operating state and a non-operating state; a refrigeration cycle pipeline where the compressor is located; the gas leading-out assembly is arranged at least three positions of the refrigeration cycle pipeline, wherein the internal pressure ranges of the three positions of the refrigeration cycle pipeline are different, and the gas leading-out assembly is used for collecting the gas pressure in the refrigeration cycle pipeline at the position of the gas leading-out assembly so as to lead the gas with the required pressure to the variable volume port. The invention can select the gas pressure difference required by the switching part of the cylinder body according to the current running frequency of the compressor so as to lead the gas led out by the corresponding gas leading-out component to the variable-capacity port, thereby avoiding the problems of violent collision, noise and deformation caused by overlarge gas pressure difference.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a variable-capacity air conditioner and a variable-capacity control method thereof.
Background
In order to solve the industrial problem of low-load energy efficiency of the multi-split air conditioner, a multi-split air conditioner system based on a large-volume and small-volume switching compressor technology is developed. The alternative switching between the working state and the non-working state of the compressor cylinder is realized by the contact or separation of the sliding vane and the rotor. In the existing control technology, the single cylinder of the unit cuts double cylinders by means of pressure difference in the system to generate pressure on the sliding sheet, and the sliding sheet is pushed to be in contact with the rotor. If system pressure differential is too big, then to the increase of the driving force of gleitbretter, then can lead to gleitbretter and rotor collision more violent, cut the jar operation for a long time and can appear gleitbretter or rotor part because of striking deformation scheduling problem, influence compressor life.
Disclosure of Invention
One of the objectives of the present invention is to provide a variable capacity air conditioner and a variable capacity control method thereof, so as to solve the problems of impact and deformation caused by cylinder cutting to a certain extent.
Some embodiments of the present invention provide a variable capacity air conditioner, including: the compressor comprises at least two cylinder bodies and variable capacity ports, wherein the variable capacity ports are used for selectively providing gas to the switching position of at least one cylinder body so as to enable the cylinder bodies to be alternately switched between an operating state and a non-operating state; a refrigeration cycle pipeline where the compressor is located; the gas leading-out assembly is arranged at least three positions of the refrigeration cycle pipeline, wherein the internal pressure ranges of the three positions of the refrigeration cycle pipeline are different, and the gas leading-out assembly is used for collecting the gas pressure in the refrigeration cycle pipeline at the position of the gas leading-out assembly so as to lead the gas with the required pressure to the variable volume port.
Optionally, the gas extraction assembly comprises: the pressure acquisition element is used for acquiring the gas pressure in the refrigeration cycle pipeline at the position of the pressure acquisition element; the first end of the gas path is communicated with the refrigeration cycle pipeline at the position of the pressure acquisition element, and the second end of the gas path is communicated with the variable volume port; and the switch valve is arranged on the gas path and used for controlling the on-off of the gas path.
Optionally, the compressor further comprises: the rotor is arranged in the cylinder body, an air cavity is formed between the rotor and the inner wall of the cylinder body, and the rotor can move along the inner wall of the cylinder body; the sliding sheet is arranged at the switching part of the cylinder body and is provided with a first station and a second station; the sliding sheet is not in contact with the rotor, and the cylinder body is in a non-working state; the sliding sheet is in contact with the rotor so as to divide the air cavity into an air suction cavity and an air exhaust cavity, and the cylinder body is in a working state; the slide plate is alternately switched between a first station and a second station under the action of the pressure difference between the gas pressure provided by the variable-volume port and the gas pressure in the cylinder body.
Optionally, the medium flowing through the refrigeration cycle pipeline corresponding to the position where each gas leading-out assembly is arranged is a gas.
Optionally, the system further comprises a four-way valve, a heat exchanger, an electronic expansion valve, a gas-liquid separator, and: the first gas leading-out assembly is arranged on a pipeline between the compressor and the four-way valve; and/or the second gas leading-out assembly is arranged on a pipeline between the four-way valve and the heat exchanger; and/or the fifth gas leading-out assembly is arranged on a pipeline at the inlet end of the gas-liquid separator.
Optionally, the system further comprises an electronic expansion valve, a gas-liquid separator and a third gas leading-out assembly, wherein the third gas leading-out assembly is arranged on a pipeline between the electronic expansion valve and the gas-liquid separator.
Optionally, the refrigeration cycle pipeline comprises an outdoor pipeline and an indoor pipeline; the outdoor pipeline is communicated with the indoor pipeline; a four-way valve is arranged on the outdoor pipeline; the variable-capacity air conditioner further comprises a fourth gas leading-out assembly, and the fourth gas leading-out assembly is arranged on a pipeline between the indoor pipeline and the four-way valve.
Some embodiments of the present invention provide a variable capacity control method of a variable capacity air conditioner, when a cylinder in a compressor is alternately switched between a non-operating state and an operating state, selectively leading gas at a position corresponding to one of the gas leading-out assemblies to a switching portion of the cylinder through a variable capacity port, so that the switching portion of the cylinder switches a state of the cylinder under the action of a pressure difference between gas pressure provided by the variable capacity port and gas pressure in the cylinder.
Optionally, the operation frequency of the compressor is detected, meanwhile, each gas leading-out assembly detects the gas pressure in the refrigeration cycle pipeline corresponding to the position of the gas leading-out assembly, the cylinder body is switched from a non-working state to a working state under the current operation frequency of the compressor, the gas pressure difference required by the switching position is selected, and the corresponding gas leading-out assembly is selected, so that the gas led out by the gas leading-out assembly is led to the variable volume port.
Optionally, the operation frequency of the compressor is detected, meanwhile, each gas leading-out assembly detects the gas pressure in the refrigeration cycle pipeline corresponding to the position of the gas leading-out assembly, the cylinder body is switched from the working state to the non-working state under the current operation frequency of the compressor, the gas pressure difference required by the switching position is selected, and the corresponding gas leading-out assembly is selected, so that the gas led out by the gas leading-out assembly is led to the variable volume port.
Based on the technical scheme, the invention at least has the following beneficial effects:
in some embodiments, at least three positions of the refrigeration cycle pipeline, which have different internal pressure ranges, are provided with gas leading-out assemblies, when the cylinder body is switched from a working state to a non-working state, the operation frequency of the compressor is detected, meanwhile, each gas leading-out assembly detects the gas pressure in the refrigeration cycle pipeline corresponding to the position of the gas leading-out assembly, the gas pressure difference required by the switching position of the gas leading-out assembly under the current operation frequency of the compressor is selected, and the corresponding gas leading-out assembly is selected so as to lead the gas led out by the gas leading-out assembly to the variable volume port, thereby avoiding the problems of severe collision, noise and deformation caused by overlarge gas pressure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic view of a partial operation principle of a variable capacity air conditioner according to some embodiments of the present invention;
fig. 2 is a schematic cross-sectional view of a compressor of a variable capacity air conditioner according to some embodiments of the present invention.
The reference numbers in the drawings:
1-a compressor; 11-a cylinder body; 12-a variable volume port; 13-a rotor; 14-a slide sheet;
2-a gas extraction assembly; 21-a pressure-collecting element; 22-gas path; 23-a switching valve;
201-a first gas withdrawal assembly; 202-a second gas withdrawal assembly; 203-a third gas withdrawal assembly; 204-a fourth gas extraction assembly; 205-a fifth gas withdrawal assembly;
3-a four-way valve; 4-a heat exchanger; 5-an electronic expansion valve; 6-gas-liquid separator; 7-a first valve; 8-second valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
Fig. 1 is a partial schematic view of a variable capacity air conditioner according to some embodiments of the present invention.
In some embodiments, the variable capacity air conditioner includes a compressor 1. The compressor 1 comprises at least two cylinders 11. Each cylinder 11 can be operated independently. For example: the compressor 1 comprises a double-cylinder compressor with two cylinder bodies. The compressor comprises a multi-cylinder compressor with more than three cylinder bodies, and the like.
Alternatively, the size of each cylinder 11 may be the same or different.
The compressor 1 can select at least one cylinder 11 to work. The number of cylinders 11 in the operating state is different, and the corresponding compressors 1 have different capacities. The purpose of capacity change of the compressor is achieved by adjusting different combined working modes among the cylinder bodies 11 and the number of the cylinder bodies 11 in the working state.
In some embodiments, each cylinder 11 includes a switching location, and the cylinder 11 is alternately switched between an operating state and a non-operating state by controlling the gas pressure at the switching location.
In some embodiments, the compressor 1 includes a variable volume port 12. The variable volume port 12 is adapted to selectively supply gas to at least one of the cylinder blocks 11 at a switching location to alternately switch the cylinder block 11 between an operating state and a non-operating state under the influence of the gas pressure.
The alternate switching of the cylinder 11 between the operating state and the non-operating state includes switching the cylinder 11 from the operating state to the non-operating state, and switching the cylinder 11 from the non-operating state to the operating state.
In some embodiments, the variable capacity air conditioner further includes a refrigeration cycle line in which the compressor 1 is located. The refrigeration cycle circuit in which the compressor 1 is located may be a commonly used refrigeration cycle circuit. Optionally, a four-way valve 3, a heat exchanger 4, an electronic expansion valve 5, a gas-liquid separator 6, and the like are provided on the refrigeration cycle pipeline where the compressor 1 is located.
In some embodiments, the positive displacement air conditioner further comprises a gas extraction assembly 2. The gas leading-out assemblies 2 are arranged at least three positions of the refrigeration cycle pipeline, wherein the internal pressure ranges of the positions of the refrigeration cycle pipeline are different, and the gas leading-out assemblies 2 are used for collecting the gas pressure in the refrigeration cycle pipeline corresponding to the positions of the gas leading-out assemblies 2 so as to lead the gas with the required pressure, which is alternately switched between the working state and the non-working state, of the cylinder body 11 to the variable-capacity port 12; the gas pressure difference is too large to solve the deformation problem caused by long-term violent collision between the sliding vane 14 and the rotor 13 when the cylinder 11 is switched from the non-working state to the working state.
In some embodiments, the gas leading-out assembly 2 includes a pressure collecting element 21, and the pressure collecting element 21 is used for collecting the gas pressure in the refrigeration cycle pipeline corresponding to the position of the pressure collecting element 21. Optionally, the pressure-collecting element 21 comprises a pressure sensor.
In some embodiments, the gas leading-out assembly 2 includes a gas path 22, a first end of the gas path 22 is communicated with the refrigeration cycle line where the pressure acquisition element 21 is located, and a second end of the gas path 22 is communicated with the variable-volume port 12. The gas passage 22 is used to introduce the gas in the refrigeration cycle line corresponding to the position of the pressure pickup element 21 to the variable-capacity port 12.
In some embodiments, the gas leading-out assembly 2 includes a switch valve 23, the switch valve 23 is disposed on the gas path 22 and is used for controlling the on-off of the gas path 22, and/or the switch valve 23 is used for controlling the flow rate of the gas path 22.
Alternatively, the on-off valve 23 includes a solenoid valve.
In some embodiments, as shown in fig. 2, the compressor 1 further includes a rotor 13, the rotor 13 is disposed in the cylinder 11, an air cavity is formed between the rotor 13 and the inner wall of the cylinder 11, and the rotor 13 can move along the inner wall of the cylinder 11.
In some embodiments, as shown in fig. 2, the compressor 1 further includes a sliding vane 14, and the sliding vane 14 is disposed at a switching position of the cylinder 11. The slide 14 has a first station and a second station. In the first station, the slide sheet 14 is not in contact with the rotor 13, and the cylinder 11 is in a non-working state. In the second station, the slide 14 is in contact with the rotor 13 to divide the air cavity into a suction cavity and an exhaust cavity, and the cylinder 11 is in operation.
The slide 14 is alternately switched between the first and second stations by the difference in pressure between the gas pressure supplied by the variable volume port 12 and the gas pressure in the cylinder 11.
The alternating transition of slide 14 between the first and second stations includes the transition of slide 14 from the first station to the second station, and the transition of slide 14 from the second station to the first station.
The principle of switching the cylinder 11 from the working state to the non-working state is as follows: when the cylinder 11 is in an operating state, high-pressure gas is communicated on the back pressure side (the side communicated with the variable volume port 12) of the sliding sheet 14, namely, the high-pressure gas is communicated to the switching part of the cylinder 11 through the variable volume port 12, so that the sliding sheet 14 is always in close contact with the rotor 13, the interior of the cylinder 11 is divided into a suction cavity and an exhaust cavity, and the compressor 1 normally sucks air and exhausts air. When low-pressure gas is introduced to the back pressure side of the sliding piece 14, namely the low-pressure gas is introduced to the switching part through the variable volume port 12, no pressure difference exists between the front and the back of the sliding piece 14, the sliding piece 14 is separated from the rotor 13, only one cavity is arranged in the cylinder body 11, air cannot be sucked and exhausted normally, and the cylinder body 11 is in a non-working state.
Based on the above, the control core of the alternate switching between the operating state and the non-operating state of the cylinder block 11 in the compressor 1 is to control the gas pressure at the variable volume port 12 of the compressor 1, i.e., the pressure on the back pressure side of the sliding vane 14. In the existing method, when the cylinder body 11 is switched from a non-working state to a working state, high-pressure gas is introduced to the back pressure side of the sliding vane 14, and when the pressure difference between suction and discharge of the compressor 1 is too large, the thrust of the sliding vane 14 due to large pressure difference is also large, and the cylinder is switched at the moment, so that the collision degree between the sliding vane 14 and the rotor 13 is increased, and the service life of the compressor is shortened.
The gas pressure that this varactor mouth 12 of this disclosure provided can provide as required to when reducing gleitbretter 14 by first station to second station conversion, the striking dynamics when gleitbretter 14 and rotor 13 contact improves the life of compressor 1 internal component.
In some embodiments, the gas leading-out assembly 2 may be disposed at different positions of the gas pressure range in the refrigeration cycle pipeline, so as to lead the gas with different pressure to the variable-capacity port 12 as required, and facilitate the alternate switching of the cylinder 11 between the working state and the non-working state.
In some embodiments, the medium flowing through the refrigeration cycle pipeline corresponding to the position where each gas leading-out assembly 2 is arranged is gas.
In some embodiments, the variable capacity air conditioner further includes a four-way valve 3, a heat exchanger 4, an electronic expansion valve 5, a gas-liquid separator 6, and a first gas leading-out assembly 201, and the first gas leading-out assembly 201 is disposed on a pipeline between the compressor 1 and the four-way valve 3.
In some embodiments, the positive displacement air conditioner further comprises a second gas withdrawal assembly 202, the second gas withdrawal assembly 202 being disposed on a line between the four-way valve 3 and the heat exchanger 4.
In some embodiments, the positive displacement air conditioner further comprises a third gas extraction assembly 203, and the third gas extraction assembly 203 is disposed on a pipeline between the electronic expansion valve 5 and the gas-liquid separator 6.
In some embodiments, the refrigeration cycle circuit includes an outdoor circuit and an indoor circuit; the outdoor pipeline is communicated with the indoor pipeline; the four-way valve 3 is arranged on an outdoor pipeline; the variable capacity air conditioner further comprises a fourth gas leading-out assembly 204, and the fourth gas leading-out assembly 204 is arranged on a pipeline between the indoor pipeline and the four-way valve 3.
In some embodiments, the positive displacement air conditioner further comprises a fifth gas extraction assembly 205, and the fifth gas extraction assembly 205 is disposed on the pipeline at the inlet end of the gas-liquid separator 6.
In some embodiments, the refrigeration cycle circuit includes an outdoor circuit and an indoor circuit. Wherein, the outdoor pipeline is provided with a four-way valve 3, a heat exchanger 4, an electronic expansion valve 5 and a gas-liquid separator 6. The outdoor pipeline and the indoor pipeline are connected through a first valve 7 and a second valve 8.
In some embodiments, the variable capacity air conditioner further includes a first gas drawing assembly 201, and the first gas drawing assembly 201 is disposed on a pipeline between the compressor 1 and the four-way valve 3.
In some embodiments, the positive displacement air conditioner further comprises a second gas withdrawal assembly 202, the second gas withdrawal assembly 202 being disposed on a line between the four-way valve 3 and the heat exchanger 4.
In some embodiments, the positive displacement air conditioner further comprises a third gas extraction assembly 203, and the third gas extraction assembly 203 is disposed on a pipeline between the electronic expansion valve 5 and the gas-liquid separator 6.
In some embodiments, the variable capacity air conditioner further comprises a fourth gas leading-out assembly 204, and the fourth gas leading-out assembly 204 is arranged on a pipeline between the first valve 7 and the four-way valve 3.
In some embodiments, the positive displacement air conditioner further comprises a fifth gas extraction assembly 205, and the fifth gas extraction assembly 205 is disposed on the pipeline at the inlet end of the gas-liquid separator 6.
In actual installation, the gas extraction module 2 is not limited to the above-described five positions. The gas lead-out assembly 2 may be provided at a position of the refrigeration cycle pipe where the pressure ranges are different to supply gas of different pressures to the variable capacity port 12.
In order to ensure the reliability of the compressor, a more reliable cylinder cutting pressure range is set for the compressor under different frequencies. When the compressor is used for cutting the cylinder, the gas leading-out assembly 2 arranged at the corresponding position can be selected to lead gas with required pressure to the variable-capacity port 12, so that corresponding cylinder cutting pressure differences are provided for different compressor frequencies.
Some embodiments provide a variable capacity control method based on the above variable capacity air conditioner, which selectively guides the gas at the position corresponding to one of the gas lead-out assemblies 2 to the switching position of the cylinder block 11 through the variable capacity port 12 when the cylinder block 11 in the compressor 1 is alternately switched between the non-working state and the working state, so that the switching position of the cylinder block 11 switches the state of the cylinder block 11 under the action of the pressure difference between the gas pressure provided by the variable capacity port 12 and the gas pressure in the cylinder block 11.
In some embodiments, the operating frequency of the compressor 1 is detected, and meanwhile, each gas leading-out assembly 2 detects the gas pressure in the refrigeration cycle pipeline corresponding to the position of the gas leading-out assembly, the gas pressure difference required by the switching position of the cylinder 11 is selected when the cylinder 11 is switched from the non-operating state to the operating state under the current operating frequency of the compressor 1, and the corresponding gas leading-out assembly 2 is selected so as to lead the gas led out by the gas leading-out assembly 2 to the variable volume port 12.
In some embodiments, the operating frequency of the compressor 1 is detected, and meanwhile, each gas leading-out assembly 2 detects the gas pressure in the refrigeration cycle pipeline corresponding to the position of the gas leading-out assembly, the gas pressure difference required by the switching position of the cylinder 11 is selected when the cylinder is switched from the working state to the non-working state under the current operating frequency of the compressor 1, and the corresponding gas leading-out assembly 2 is selected so as to lead the gas led out by the gas leading-out assembly 2 to the variable volume port 12.
In some embodiments, in a state where one of the gas withdrawal assemblies 2 is in communication with the variable volume port 12, the other gas withdrawal assemblies 2 are disconnected from the variable volume port 12.
In a specific embodiment as shown in fig. 1, when the cylinder 11 is switched from the non-operating state to the operating state, the unit first detects the operating frequency of the compressor 1, and the pressure sensor in each gas leading-out assembly 2 detects the pressure at each solenoid valve, and then selects the optimal cylinder-switching pressure difference corresponding to the current operating frequency of the compressor 1. The optimum cylinder-cut differential pressure can be obtained experimentally.
For example: the pressure at the solenoid valve in the third gas leading-out assembly 203 is optimal, then the solenoid valve in the third gas leading-out assembly 203 is opened, and the high-pressure gas is led to the back pressure side of the sliding sheet 14, so that the sliding sheet 14 is in close contact with the rotor 13, and the cylinder 11 is switched from the non-working state to the working state. The solenoid valves in the first gas withdrawal assembly 201, the second gas withdrawal assembly 202, the fourth gas withdrawal assembly 204, and the fifth gas withdrawal assembly 205 are closed.
When the cylinder 11 is switched from the operating state to the non-operating state, the solenoid valve in the fifth gas leading-out assembly 205 is opened, and the solenoid valves in the other gas leading-out assemblies are all closed.
In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are used only for the convenience of distinguishing the components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A variable capacity air conditioner, comprising:
the compressor (1) comprises at least two cylinder bodies (11) and variable-capacity ports (12), wherein the variable-capacity ports (12) are used for selectively providing gas to the switching position of at least one cylinder body (11) so as to enable the cylinder body (11) to be alternately switched between an operating state and a non-operating state;
a refrigeration cycle pipeline where the compressor (1) is located; and
the gas leading-out assembly (2) is arranged at least three positions of the refrigeration cycle pipeline, wherein the internal pressure ranges of the three positions of the refrigeration cycle pipeline are different, and the gas leading-out assembly (2) is used for collecting the gas pressure in the refrigeration cycle pipeline at the position of the gas leading-out assembly (2) so as to lead the gas with the required pressure to the variable-capacity port (12);
and setting corresponding cylinder cutting pressure ranges of the compressor (1) under different frequencies, and when the compressor cuts the cylinder, selecting the gas leading-out assembly (2) arranged at a corresponding position to lead gas with required pressure to the variable-volume port (12) so as to provide corresponding cylinder cutting pressure differences for different compressor frequencies.
2. Variable capacity air conditioner according to claim 1, characterized in that the gas extraction assembly (2) comprises:
the pressure acquisition element (21) is used for acquiring the gas pressure in the refrigeration cycle pipeline at the position of the pressure acquisition element;
a gas path (22) having a first end communicating with the refrigeration cycle pipeline where the pressure pickup element (21) is located and a second end communicating with the variable volume port (12); and
and the switch valve (23) is arranged on the air path (22) and is used for controlling the on-off of the air path (22).
3. Variable capacity air conditioner according to claim 1, characterized in that the compressor (1) further comprises:
the rotor (13) is arranged in the cylinder body (11), an air cavity is formed between the rotor and the inner wall of the cylinder body (11), and the rotor (13) can move along the inner wall of the cylinder body (11); and
the sliding sheet (14) is arranged at the switching part of the cylinder body (11) and is provided with a first station and a second station; the slide sheet (14) is not in contact with the rotor (13), and the cylinder body (11) is in a non-working state; the sliding sheet (14) is in contact with the rotor (13) so as to divide the air cavity into an air suction cavity and an air exhaust cavity, and the cylinder body (11) is in a working state; the slide (14) is alternately switched between a first station and a second station under the action of the pressure difference between the gas pressure provided by the variable-volume port (12) and the gas pressure in the cylinder (11).
4. The variable capacity air conditioner according to claim 1, wherein the medium flowing in the refrigeration cycle pipe corresponding to the position where each gas lead-out member (2) is disposed is gas.
5. The variable capacity air conditioner according to claim 1, further comprising a four-way valve (3), a heat exchanger (4), an electronic expansion valve (5), a gas-liquid separator (6), and:
the first gas leading-out assembly (201) is arranged on a pipeline between the compressor (1) and the four-way valve (3); and/or the presence of a gas in the gas,
the second gas leading-out assembly (202) is arranged on a pipeline between the four-way valve (3) and the heat exchanger (4); and/or the presence of a gas in the gas,
and the fifth gas leading-out assembly (205) is arranged on a pipeline at the inlet end of the gas-liquid separator (6).
6. The variable capacity air conditioner according to claim 1, further comprising an electronic expansion valve (5), a gas-liquid separator (6), and a third gas lead-out assembly (203), wherein the third gas lead-out assembly (203) is disposed on a pipeline between the electronic expansion valve (5) and the gas-liquid separator (6).
7. The variable capacity air conditioner according to claim 1, wherein the refrigeration cycle piping includes an outdoor piping and an indoor piping; the outdoor pipeline is communicated with the indoor pipeline; a four-way valve (3) is arranged on the outdoor pipeline; the variable-capacity air conditioner further comprises a fourth gas leading-out assembly (204), and the fourth gas leading-out assembly (204) is arranged on a pipeline between the indoor pipeline and the four-way valve (3).
8. A variable capacity control method of a variable capacity air conditioner according to claim 1, characterized in that when the cylinder (11) in the compressor (1) is alternately switched between a non-operating state and an operating state, the gas at the position corresponding to one of the gas lead-out assemblies (2) is selectively led to the switching position of the cylinder (11) through the variable capacity port (12), so that the switching position of the cylinder (11) switches the state of the cylinder (11) under the action of the pressure difference between the gas pressure provided by the variable capacity port (12) and the gas pressure in the cylinder (11).
9. The variable capacity control method of the variable capacity air conditioner according to claim 8, characterized in that the operation frequency of the compressor (1) is detected, and each gas leading-out assembly (2) detects the gas pressure in the refrigeration cycle pipeline corresponding to the position of the gas leading-out assembly, and the gas pressure difference required by the switching position of the cylinder (11) is selected to switch the cylinder from the non-working state to the working state under the current operation frequency of the compressor (1), and the corresponding gas leading-out assembly (2) is selected to lead the gas led out by the gas leading-out assembly (2) to the variable capacity port (12).
10. The variable capacity control method of the variable capacity air conditioner according to claim 8, characterized in that the operation frequency of the compressor (1) is detected, and each gas leading-out assembly (2) detects the gas pressure in the refrigeration cycle pipeline corresponding to the position of the gas leading-out assembly, and the gas pressure difference required by the switching position of the cylinder (11) is selected to switch the cylinder from the working state to the non-working state under the current operation frequency of the compressor (1), and the corresponding gas leading-out assembly (2) is selected to lead the gas led out by the gas leading-out assembly (2) to the variable capacity port (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127674.2A CN109237676B (en) | 2018-09-27 | 2018-09-27 | Variable-capacity air conditioner and variable-capacity control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127674.2A CN109237676B (en) | 2018-09-27 | 2018-09-27 | Variable-capacity air conditioner and variable-capacity control method thereof |
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| Publication Number | Publication Date |
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| CN109237676A CN109237676A (en) | 2019-01-18 |
| CN109237676B true CN109237676B (en) | 2020-03-20 |
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| CN201811127674.2A Active CN109237676B (en) | 2018-09-27 | 2018-09-27 | Variable-capacity air conditioner and variable-capacity control method thereof |
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| DE2946906C2 (en) * | 1979-11-21 | 1985-02-14 | Bitzer Kühlmaschinenbau GmbH & Co KG, 7032 Sindelfingen | Rotary compressor |
| JP4861900B2 (en) * | 2007-02-09 | 2012-01-25 | サンデン株式会社 | Capacity control system for variable capacity compressor |
| EP3040642B1 (en) * | 2013-08-28 | 2021-06-02 | Mitsubishi Electric Corporation | Air conditioner |
| CN105485991B (en) * | 2016-01-04 | 2018-07-24 | 珠海格力电器股份有限公司 | A kind of positive displacement compressor system and control method, air-conditioning |
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