CN110145889B - Air conditioner system, air conditioner and air conditioner system control method - Google Patents
Air conditioner system, air conditioner and air conditioner system control method Download PDFInfo
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- CN110145889B CN110145889B CN201910508010.9A CN201910508010A CN110145889B CN 110145889 B CN110145889 B CN 110145889B CN 201910508010 A CN201910508010 A CN 201910508010A CN 110145889 B CN110145889 B CN 110145889B
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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
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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
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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
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application provides an air conditioner system, an air conditioner and a method for controlling the air conditioner system. An air conditioner system includes a compressor; the first end of the condenser is communicated with the exhaust port of the compressor; the first end of the evaporator is communicated with the second end of the condenser, and the second end of the evaporator is communicated with the air suction port of the compressor; the first end of the storage liquid passage is selectively communicated with the second end of the condenser or the first end of the evaporator, the second end of the storage liquid passage is communicated with the air suction port of the compressor, and the storage liquid passage is provided with a liquid storage device which is used for storing or releasing the refrigerant in the pipeline of the air conditioner system so as to increase or reduce the total amount of the refrigerant flowing in the pipeline of the air conditioner system. The liquid accumulator is used for storing the refrigerant in the air conditioner system so as to change the heat quantity which can exchange heat according to actual needs under different operation conditions to control the total quantity of the refrigerant flowing in the air conditioner system, thereby effectively improving the energy efficiency value of the air conditioner system.
Description
Technical Field
The application relates to the technical field of air conditioner equipment, in particular to an air conditioner system, an air conditioner and a method for controlling the air conditioner system.
Background
When the performance of the air conditioner is matched, when the configuration, working condition and frequency of the air conditioner are fixed, the exhaust temperature, the suction temperature and the refrigerant circulation quantity are at a reasonable value, the requirements of meeting the refrigerating capacity can be met, the COP is improved, the value of the energy efficiency value COP is increased along with the increase of the refrigerant, and when the quantity of the refrigerant reaches a certain quantity, the COP is reduced along with the increase of the refrigerant, so that the reasonable refrigerant circulation quantity plays a vital role in the COP in the whole system.
And when the configuration and the frequency of the air conditioner are fixed, the circulation quantity reaching the optimal COP is different under different working conditions. In the past, people have fixed thinking, the throttle strength is controlled by an advanced electronic expansion valve opening-adjustable technology, and compared with a one-layer constant-strength throttle mode of a capillary tube, the throttle strength control device has higher cost performance and higher comfort experience.
Disclosure of Invention
The application mainly aims to provide an air conditioner system, an air conditioner and a method for controlling the air conditioner system, so as to solve the problem of low COP value of the air conditioner system in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided an air conditioner system comprising: a compressor; the first end of the condenser is communicated with the exhaust port of the compressor; the first end of the evaporator is communicated with the second end of the condenser, and the second end of the evaporator is communicated with the air suction port of the compressor; the first end of the storage liquid passage is selectively communicated with the second end of the condenser or the first end of the evaporator, the second end of the storage liquid passage is communicated with the air suction port of the compressor, and the storage liquid passage is provided with a liquid storage device which is used for storing or releasing the refrigerant in the pipeline of the air conditioner system so as to increase or reduce the total quantity of the refrigerant flowing in the pipeline of the air conditioner system according to the heat of heat exchange actually required under different operation conditions.
Further, the air conditioner system includes: the pressure three-way valve is arranged on the liquid storage passage, and the first end of the liquid storage passage is selectively communicated with the second end of the condenser or the first end of the evaporator through the pressure three-way valve.
Further, the air conditioner system further includes: the first-stage bypass electronic valve is arranged on a pipeline between the pressure three-way valve and the liquid reservoir.
Further, the air conditioner system further includes: the second-stage bypass two-way valve is arranged on a pipeline between the liquid reservoir and the air suction port of the compressor.
Further, the air conditioner system further includes: the check valve is arranged on a pipeline between the two-stage bypass two-way valve and the air suction port of the compressor.
Further, a throttle valve is arranged on a pipeline between the second end of the condenser and the first end of the evaporator, one inlet branch of the pressure three-way valve is arranged on a pipeline between the second end of the condenser and the throttle valve, and the other inlet branch of the pressure three-way valve is arranged on a pipeline between the throttle valve and the first end of the evaporator.
Further, the air conditioner system further includes: and the exhaust port of the compressor is selectively communicated with the first end of the condenser or the second end of the evaporator through the four-way valve.
According to another aspect of the present application, there is provided an air conditioner including an air conditioner system, the air conditioner system being the air conditioner system described above.
According to another aspect of the present application, there is provided a method of controlling an air conditioner system, the method being for controlling the air conditioner system described above, the method comprising the steps of: and selecting whether to allow part of the refrigerant to enter the liquid storage device through the storage liquid passage according to whether the detected ambient temperature is within a preset range so as to reduce the total amount of the refrigerant flowing in the pipeline of the air conditioner system.
Further, the method comprises the following steps: the environment temperature comprises an indoor temperature and an outdoor temperature, when the temperature sensing bulb detects that the absolute value of the difference between the outdoor temperature and the first set value is smaller than or equal to T1, the temperature sensing bulb judges that the low-flow circulation mode is suitable, and when the absolute value of the difference between the outdoor temperature and the first set value is larger than T1, the temperature sensing bulb judges that the low-flow circulation mode is the normal-flow circulation mode.
Further, in the normal flow circulation mode, the primary bypass electronic valve of the air conditioner system is in a closed state, and the secondary bypass two-way valve is in an open state.
Further, in the small flow circulation mode, the circulation quantity of the refrigerant is determined according to the difference between the indoor temperature and the second set value, if the difference between the indoor temperature and the second set value is smaller, the compressor performs high-frequency operation to increase the quantity of the refrigerant in the liquid storage device, if the difference between the indoor temperature and the second set value is larger, the operation frequency of the compressor under the current working condition is increased to the middle frequency to perform boosting operation, the first-stage bypass electronic valve is controlled to be in an open state, and the second-stage bypass two-way valve is controlled to be in a closed state.
Further, in the low flow circulation mode, the amount of refrigerant flowing into the accumulator is determined by the discharge temperature of the compressor.
Further, in the low flow circulation mode, after the discharge temperature of the compressor reaches a preset value, the primary bypass electronic valve and the secondary bypass two-way valve are closed to retain a portion of the refrigerant in the accumulator.
Further, in the continuous operation process of the compressor, the temperature sensing bag periodically detects the indoor temperature and the outdoor temperature, compares the indoor temperature with a second set value, compares the outdoor temperature with a first set value, and determines to select a small flow circulation mode or a normal flow circulation mode according to a comparison result.
Further, after each compressor shutdown, the primary bypass electronic valve and the secondary bypass two-way valve default back to open.
Further, when the temperature sensing bulb detects that the absolute value of the difference between the indoor temperature and the set value is smaller than or equal to T2, the compressor performs high-frequency operation at the moment, and when the absolute value of the difference between the indoor temperature and the set value is larger than T2, the operation frequency of the compressor under the current working condition is increased to the intermediate frequency to perform boosting operation.
Further, the compressor is a variable frequency compressor.
Further, the compressor is a fixed frequency compressor.
By adopting the technical scheme of the application, the storage liquid passage is arranged in the air conditioner system, the liquid storage device is arranged on the storage liquid passage, and the liquid storage device is used for storing the refrigerant in the air conditioner system, so that the total quantity of the refrigerant flowing in the air conditioner system can be controlled by changing the heat which can exchange heat according to actual needs under different operation conditions, and the energy efficiency value of the air conditioner system is effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a undue limitation; in the drawings:
fig. 1 is a schematic view showing a structure of an embodiment of a circulation flow direction of a refrigerant in a system in a cooling mode of an air conditioner system according to the present application;
fig. 2 is a schematic view showing the construction of an embodiment of a storage liquid passage in an air conditioner system according to the present application;
fig. 3 is a schematic view showing the structure of an embodiment of a circulating flow direction of a refrigerant in a heating mode of an air conditioner system according to the present application;
fig. 4 is a schematic flow chart showing an embodiment of a control method of a variable frequency air conditioner system according to the present application;
fig. 5 is a schematic view showing a flow configuration of an embodiment of a control method of a fixed-frequency air conditioner system according to the present application;
wherein the above figures include the following reference numerals:
1. a pressure three-way valve; 2. a first-stage bypass electronic valve; 3. a reservoir; 4. a two-stage bypass two-way valve; 5. a one-way valve; 6. a compressor; 7. a four-way valve; 8. a condenser; 9. a throttle valve; 10. an evaporator.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
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 exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims and drawings of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.
As shown in conjunction with fig. 1 to 5, according to an embodiment of the present application, an air conditioner system is provided.
As shown in fig. 1 and 2, the air conditioner system includes a compressor 6, a condenser 8, an evaporator 10, a storage liquid passage, and a liquid reservoir 3. The first end of the condenser 8 communicates with the discharge port of the compressor 6. The first end of the evaporator 10 communicates with the second end of the condenser 8. A second end of the evaporator 10 communicates with the suction port of the compressor 6. The first end of the storage fluid passage is selectively communicated with the second end of the condenser 8 or the first end of the evaporator 10, and the second end of the storage fluid passage is communicated with the suction port of the compressor 6. The liquid storage passage is provided with a liquid storage device 3, and the liquid storage device 3 is used for storing or releasing the refrigerant in the pipeline of the air conditioner system so as to increase or reduce the total quantity of the refrigerant flowing in the pipeline of the air conditioner system according to the heat of heat exchange actually required under different operation conditions.
In this embodiment, the storage liquid passage is provided in the air conditioner system, the liquid storage device is provided on the storage liquid passage, and the liquid storage device is used for storing the refrigerant in the air conditioner system, so as to change the heat quantity which can exchange heat according to actual needs under different operation conditions, so as to control the total quantity of the refrigerant flowing in the air conditioner system, thereby effectively improving the energy efficiency value of the air conditioner system.
Specifically, as shown in fig. 2, the air conditioner system includes a pressure three-way valve 1. The pressure three-way valve 1 is arranged on the liquid storage passage, and the first end of the liquid storage passage is selectively communicated with the second end of the condenser 8 or the first end of the evaporator 10 through the pressure three-way valve 1. This arrangement enables the refrigerant located in the line system to be led into the reservoir 3.
The air conditioner system further comprises a primary bypass electronic valve 2 and a secondary bypass two-way valve 4. The primary bypass electronic valve 2 is arranged on a pipeline between the pressure three-way valve 1 and the liquid reservoir 3. The two-stage bypass two-way valve 4 is provided in a line between the accumulator 3 and the suction port of the compressor 6. This arrangement effectively controls the amount of refrigerant entering the accumulator 3 and also smoothly releases the refrigerant located in the accumulator 3 into the air conditioner system.
In order to prevent a back flow of the refrigerant from occurring during the discharge of the refrigerant, the air conditioner system is further provided with a check valve 5. The check valve 5 is provided in a line between the two-stage bypass two-way valve 4 and the intake port of the compressor 6.
Wherein, a throttle valve 9 is arranged on a pipeline between the second end of the condenser 8 and the first end of the evaporator 10, one inlet branch of the pressure three-way valve 1 is arranged on a pipeline between the second end of the condenser 8 and the throttle valve 9, and the other inlet branch of the pressure three-way valve 1 is arranged on a pipeline between the throttle valve 9 and the first end of the evaporator 10. The air conditioner system is also provided with a four-way valve 7. The discharge port of the compressor 6 is selectively communicated with the first end of the condenser 8 or the second end of the evaporator 10 through the four-way valve 7. This arrangement enables the air conditioner system to be switched between cooling and heating modes.
The air conditioner system in the above embodiment may also be used in the air conditioner technical field, that is, according to another aspect of the present application, an air conditioner is provided, including the air conditioner system, where the air conditioner system is the air conditioner system in the above embodiment.
According to another aspect of the present application, as shown in fig. 4, there is provided a method of controlling an air conditioner system, the method being for controlling the air conditioner system in the above-described embodiment, the method comprising the steps of: based on whether the detected ambient temperature is within a preset range, it is selected whether a portion of the refrigerant is allowed to enter the accumulator 3 through the storage liquid passage to reduce the total amount of refrigerant flow in the air conditioner system piping.
In this embodiment, the ambient temperature includes an indoor temperature and an outdoor temperature, when the temperature sensing bulb detects that the absolute value of the difference between the outdoor temperature and the set value is less than or equal to T1, it is determined that the low flow circulation mode is suitable, and when the absolute value of the difference between the outdoor temperature and the set value is greater than T1, it is determined that the normal flow circulation mode is suitable. Wherein, indoor temperature is short for inner ring, and outdoor temperature is short for outer ring. In the normal flow circulation mode, the air conditioner system primary bypass electronic valve 2 is in a closed state and the secondary bypass two-way valve 4 is in an open state.
In the small flow circulation mode, the amount of the circulation amount of the refrigerant is determined according to the difference between the outdoor temperature and the set value, if the difference between the outdoor temperature and the set value is smaller, the compressor 6 performs high-frequency operation to increase the amount of the refrigerant in the accumulator 3, if the difference between the outdoor temperature and the set value is larger, the operating frequency of the compressor 6 is increased to the intermediate frequency under the current working condition to perform boosting operation, and then the first-stage bypass electronic valve 2 is controlled to be in an opened state, and the second-stage bypass two-way valve 4 is controlled to be in a closed state. The amount of refrigerant flowing into the accumulator 3 is determined by the discharge temperature of the compressor 6. After the discharge temperature of the compressor 6 reaches a preset value, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 are closed to retain a portion of the refrigerant in the accumulator 3. During the continuous operation of the compressor 6, the bulb periodically detects the indoor temperature and the outdoor temperature, compares the difference between the indoor temperature and the outdoor temperature and the set value, and determines to select the small flow circulation mode or the normal flow circulation mode according to the comparison value. After each time the compressor 6 is shut down, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 default to the open state.
Further, when the bulb detects that the absolute value of the difference between the indoor temperature and the set value is less than or equal to T2, the compressor 6 performs a high-frequency operation at this time, and when the absolute value of the difference between the indoor temperature and the set value is greater than T2, the operating frequency of the compressor 6 under the current operating condition is increased to an intermediate frequency to perform a step-up operation.
Of course, in this embodiment, the compressor may be a fixed-frequency compressor, and as shown in fig. 5, the air conditioner system is a fixed-frequency air conditioner system. Based on whether the detected ambient temperature is within a preset range, it is selected whether a portion of the refrigerant is allowed to enter the accumulator 3 through the storage liquid passage to reduce the total amount of refrigerant flow in the air conditioner system piping. The environment temperature comprises an indoor temperature and an outdoor temperature, when the temperature sensing bulb detects that the absolute value of the difference between the outdoor temperature and the set value is smaller than or equal to T1, the temperature sensing bulb judges that the low-flow circulation mode is suitable, and when the absolute value of the difference between the outdoor temperature and the set value is larger than T1, the temperature sensing bulb judges that the low-flow circulation mode is the normal-flow circulation mode. Wherein, indoor temperature is short for inner ring, and outdoor temperature is short for outer ring. In the normal flow circulation mode, the air conditioner system primary bypass electronic valve 2 is in a closed state and the secondary bypass two-way valve 4 is in an open state. In the low flow circulation mode, the amount of refrigerant flowing into the accumulator 3 is determined by the discharge temperature of the compressor 6. After the discharge temperature of the compressor 6 reaches a preset value, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 are closed to retain a portion of the refrigerant in the accumulator 3. During the continuous operation of the compressor 6, the bulb periodically detects the indoor temperature and the outdoor temperature, compares the difference between the indoor temperature and the outdoor temperature and the set value, and determines to select the small flow circulation mode or the normal flow circulation mode according to the comparison value. After each time the compressor 6 is shut down, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 default to the open state. Among other things, it is noted that compressor shutdown includes protection shutdown, entering defrost shutdown, and manual remote shutdown to shut down the compressor, while "each compressor 6 shutdown" of the present application refers to: the compressor is stopped by manual remote control shutdown, and the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 are restored to the open state by default.
Specifically, the air conditioner system solves the system problem that the total circulation amount of the refrigerant in the system is not adjustable. The logic control problem that the total quantity of refrigerant circulation in the system is not adjustable is solved. The problem of the low degree of superheat of the oil temperature of the compressor under the partial operating mode of the non-adjustable system of refrigerant is solved, and the reliability of products is improved.
The air conditioner system of the application can further improve the energy efficiency benefit and the quality reliability of the product. The refrigerating device composed of the primary electronic valve, the secondary two-way valve, the liquid storage capacity and the one-way valve is reasonably selected, and reasonable electronic valve and two-way valve logic are set, so that the overall circulation volume of the system can be changed, the capacity requirement is met, the working of the compressor is reduced, and the COP energy efficiency value during heating and refrigerating is improved.
By adopting the air conditioner system, the adjustable total refrigerant circulation amount is realized, and compared with a system with the unadjustable total refrigerant circulation amount, the product reliability such as the oil temperature superheat degree can be improved by changing the total refrigerant circulation amount. The refrigerant flow of the system is stored or released through the liquid storage device, so that the effect of changing the total circulation amount of the refrigerant is achieved.
In the traditional industry, the total refrigerant circulation amount in an air conditioning system is always equal to the filling amount, and the optimal circulation amount of the system under different working conditions is not the same, so that when the working conditions change, the original filling circulation amount can not be effectively ensured to be always or approximately in the optimal circulation amount interval under different working conditions.
According to the application, the liquid storage device is arranged, so that the total circulation amount of the system can be controlled to be adjustable according to different working conditions, the total circulation amount is smaller than or equal to the original filling amount, the purposes of meeting the capacity requirement, reducing the working of the compressor and improving the COP energy efficiency value during heating and refrigerating are realized.
The device can divide the refrigerant in the system into two parts through the liquid accumulator, one part is the refrigerant which participates in the system circulation, the other part is the refrigerant which does not participate in the system circulation and is stored, wherein the stored refrigerant can be released into the system through the refrigerating device or continuously stored in the system, and the total quantity of the refrigerating circulation is regulated through a strict control mode.
On the premise of ensuring the reliability of performance, compared with the original system, the power consumption is reduced when the performance is ensured at different temperatures, the COP is improved, and the reliability of the overheat degree of the oil temperature of the system can be considered at low temperature. As shown in fig. 1, when the air conditioner is turned on for refrigeration, the pressure three-way valve 1 automatically selects the high-pressure side outlet of the condenser 8 to be communicated with the liquid storage device 3 along with the rising of the refrigeration pressure system, and the primary bypass electronic valve 2 controls the liquid storage amount through the exhaust temperature. The liquid storage device 3 is used for storing the refrigerant which does not participate in circulation in the system under certain working conditions, the two-stage bypass two-way valve 4 is matched with the primary bypass electronic valve 2 to form a closed liquid storage effect, and the one-way valve 5 ensures that the liquid in the liquid storage device 3 can approximately completely flow into the system when the liquid storage device is not needed, and the liquid storage device 3 cannot flow back.
As shown in fig. 3, when the air conditioner is turned on to heat, the pressure three-way valve 1 automatically selects the high-pressure side outlet of the evaporator 10 to be communicated with the liquid reservoir 3 along with the rising of the heating pressure system, and the primary bypass electronic valve 2 controls the liquid storage amount through the exhaust temperature. The liquid storage device 3 is used for storing the refrigerant which does not participate in circulation in the system under certain working conditions, the two-stage bypass two-way valve 4 is matched with the primary bypass electronic valve 2 to form a closed liquid storage effect, and the one-way valve 5 ensures that the liquid in the liquid storage device 3 can approximately completely flow into the system when the liquid storage device is not needed, and the liquid storage device 3 cannot flow back.
The logic control method can accurately control and change the total quantity of the refrigeration cycle, so that the total quantity of the refrigeration cycle of the control system under different working conditions is at or approximately at the optimal value of the refrigerant circulation under the working conditions, thereby realizing the purposes of meeting the capacity requirement, reducing the working of the compressor and improving the COP energy efficiency value during heating and refrigerating.
Refrigerant is stored in the accumulator 3 under appropriate conditions. When the refrigerating capacity and the heating capacity of the system are large, a large refrigerant circulation quantity is needed, no refrigerant exists in the device, when the refrigerating capacity and the heating capacity of the system are small, part of the refrigerant can be stored in the liquid storage device 3, when the refrigerating capacity and the heating capacity of the system are small, the circulation quantity of the system is small, the corresponding exhaust pressure is reduced, the working capacity of the compressor is small at the same rotating speed, and the refrigerating capacity is higher in contrast, so that the optimal refrigerant circulation quantity is ensured under all working conditions, and the power consumption is reduced. The amount of refrigeration and heating capacity is determined by the set temperature and the outer ring temperature difference, and the larger the two are, the larger the air conditioning capacity is generally required, so the refrigerant circulation amount is larger, and the smaller the other is.
As shown in fig. 4, for the inverter, when the inverter is suitable for running at a small flow rate, if the difference between the indoor temperature and the set temperature is smaller, (wherein, as shown in fig. 4, the difference is larger or smaller and can be obtained by comparing with the T2 value), the capacity needs to be smaller, the circulation amount of the refrigerant can be adjusted to be smaller, at the moment, the liquid storage amount in the liquid storage tank is increased by a high-frequency boosting mode, and the liquid receiving accuracy is controlled by the exhaust temperature. The exhaust temperature T set for generally controlling the liquid receiving accuracy of the liquid storage device is determined in logic in advance by the frequency and the delta t= |setting-the inner ring|.
The control method of the whole system comprises the following steps: and determining the flow circulation quantity according to the set temperature and the outer ring. The temperature sensing bag detects the inner ring and the outer ring, when the set temperature and the outer ring temperature are smaller, for example: and I is set, the outer ring I is less than or equal to T1, the suitability of the low-flow circulation is judged, the subsequent liquid storage logic is executed, otherwise, the normal flow circulation is judged, the primary bypass electronic valve 2 is closed, the secondary bypass two-way valve 4 is opened, and the refrigerant is not approximately present in the liquid storage device 3. The outer ring and the set temperature are used as basic judging conditions.
The liquid storage control is executed, firstly, the quantity of the refrigeration circulation quantity is judged according to the set temperature and the temperature difference of the inner ring, the fact that the temperature difference is smaller indicates that the refrigeration circulation quantity is smaller, the high-frequency operation is needed at the moment, the high-pressure side pressure is increased, the liquid storage quantity is increased, otherwise, the pressure is increased according to the middle frequency of the frequency operation interval under the working condition, and the moderate liquid storage quantity is ensured. The inner ring and the set temperature are further used as judging conditions for adjusting the optimal flow.
And secondly, the refrigerating capacity is stored through a regulating process: the first-stage bypass electronic valve 2 is opened, the second-stage bypass two-way valve 4 is closed, the liquid receiving amount is accurately determined according to the exhaust temperature, and the exhaust temperature T for generally controlling the liquid receiving accuracy is determined in logic in advance by frequency and delta t= |setting-inner ring|. The exhaust temperature is controlled by the first electronic expansion valve, and specific control parameters are required to be set according to the configuration characteristics of different models.
After the exhaust temperature is met, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 are closed, so that the refrigerant in the liquid reservoir 3 does not participate in the system circulation any more, the work of changing the circulating refrigerating capacity of the system is primarily completed, and then the system enters a free running mode. Therefore, the beneficial effects of improving the refrigerating and heating performance of the air conditioner and reducing the working of the compressor are realized.
When the operation time is greater than or equal to t min after the operation time is longer than or equal to t min, the system re-detects the inner ring, the outer ring and the set temperature, and re-judges the optimal circulating refrigerant quantity of the system which needs to be selected due to the fluctuation of the working condition, so that the adjustment of the refrigerant quantity is flexibly finished through the change of the working condition. After the user shuts down, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 are both restored to the open state by default.
Through the control, when the refrigerating capacity requirement is met, the effect of changing the refrigerating capacity regulation in the system is achieved, and the COP of the optimal circulation capacity is realized.
Because the oil temperature superheat degree directly influences the effect of lubricating oil, when the oil temperature superheat degree is lower, the refrigerant in the lubricating oil is more, dilutes the lubricating oil effect, and the compressor liquid impact is easy to cause in the lubricating process. Aiming at the problems of compressor service life reliability caused by insufficient viscosity of compressor lubricating oil or insufficient oil film strength due to less performance requirements and insufficient oil temperature superheat degree of heating and refrigerating working conditions, the exhaust can be improved by changing the total circulation amount of the system refrigerant, and the requirements of superheat degree are met, so that the problem can be solved.
As shown in fig. 5, for the fixed frequency machine, the control method of the whole system is as follows: and determining the flow circulation quantity according to the set temperature and the outer ring. The temperature sensing bag detects the inner ring and the outer ring, when the set temperature and the outer ring temperature are smaller, for example: and I is set, the outer ring I is less than or equal to T1, the suitability of the small flow cycle is judged, the subsequent liquid storage logic is executed, otherwise, the normal flow cycle is judged, the primary bypass electronic valve 2 is closed, the secondary bypass two-way valve 4 is opened, and no refrigerant exists in the liquid storage device. The outer ring and the set temperature are used as basic judging conditions.
And secondly, the refrigerating capacity is stored through a regulating process: the first-stage bypass electronic valve is opened, the second-stage bypass two-way valve is closed, the liquid receiving amount is accurately determined according to the exhaust temperature, and the exhaust temperature T for controlling the liquid receiving accuracy is determined in logic in advance. The first electronic expansion valve is used for controlling the exhaust temperature, and specific logic parameters are required to be set according to the configuration characteristics of different types of machines.
After the exhaust temperature is met, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 are closed, so that the refrigerant in the liquid reservoir does not participate in the system circulation any more, the work of changing the circulating refrigerating capacity of the system is primarily completed, and then the system enters a free running mode. Therefore, the beneficial effects of improving the refrigerating and heating performance of the air conditioner and reducing the working of the compressor are realized.
When the operation time is greater than or equal to t min after the operation time is longer than or equal to t min, the system re-detects the inner ring, the outer ring and the set temperature, and re-judges the optimal circulating refrigerant quantity of the system which needs to be selected due to the fluctuation of the working condition, so that the adjustment of the refrigerant quantity is flexibly finished through the change of the working condition. After the user shuts down, the primary bypass electronic valve 2 and the secondary bypass two-way valve 4 are both restored to the open state by default.
Because the oil temperature superheat degree directly influences the effect of lubricating oil, when the oil temperature superheat degree is lower, the refrigerant in the lubricating oil is more, dilutes the lubricating oil effect, and the compressor liquid impact is easy to cause in the lubricating process. Aiming at the problems of compressor service life reliability caused by insufficient viscosity of compressor lubricating oil or insufficient oil film strength due to less performance requirements and insufficient oil temperature superheat degree of heating and refrigerating working conditions, the exhaust can be improved by changing the total circulation amount of the system refrigerant, and the requirements of superheat degree are met, so that the problem can be solved.
In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., indicate that the particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application, as generally described. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (17)
1. An air conditioner system, comprising:
a compressor (6);
a condenser (8), a first end of the condenser (8) being in communication with a discharge port of the compressor (6);
an evaporator (10), a first end of the evaporator (10) being in communication with a second end of the condenser (8), a second end of the evaporator (10) being in communication with an intake of the compressor (6);
a storage liquid passage, wherein a first end of the storage liquid passage is selectively communicated with a second end of the condenser (8) or a first end of the evaporator (10), a second end of the storage liquid passage is communicated with an air suction port of the compressor (6), a liquid storage device (3) is arranged on the storage liquid passage, and the liquid storage device (3) is used for storing or releasing the refrigerant in the air conditioner system pipeline so as to increase or decrease the total quantity of the refrigerant flowing in the air conditioner system pipeline according to the heat of heat exchange actually required under different operation conditions;
the air conditioner system includes:
a pressure three-way valve (1), wherein the pressure three-way valve (1) is arranged on the storage liquid passage, and the first end of the storage liquid passage is selectively communicated with the second end of the condenser (8) or the first end of the evaporator (10) through the pressure three-way valve (1);
a throttle valve (9) is arranged on a pipeline between the second end of the condenser (8) and the first end of the evaporator (10), one inlet branch of the pressure three-way valve (1) is arranged on a pipeline between the second end of the condenser (8) and the throttle valve (9), and the other inlet branch of the pressure three-way valve (1) is arranged on a pipeline between the throttle valve (9) and the first end of the evaporator (10).
2. The air conditioner system of claim 1, further comprising:
the primary bypass electronic valve (2) is arranged on a pipeline between the pressure three-way valve (1) and the liquid reservoir (3).
3. The air conditioner system of claim 1, further comprising:
the two-stage bypass two-way valve (4) is arranged on a pipeline between the liquid storage device (3) and the air suction port of the compressor (6).
4. The air conditioner system of claim 3, further comprising:
and the one-way valve (5) is arranged on a pipeline between the two-stage bypass two-way valve (4) and the air suction port of the compressor (6).
5. The air conditioner system of claim 1, further comprising:
and the exhaust port of the compressor (6) is selectively communicated with the first end of the condenser (8) or the second end of the evaporator (10) through the four-way valve (7).
6. An air conditioner comprising an air conditioner system, wherein the air conditioner system is the air conditioner system of any one of claims 1 to 5.
7. A method of controlling an air conditioner system, the method being for controlling the air conditioner system as claimed in any one of claims 1 to 5, the method comprising the steps of:
and according to whether the detected ambient temperature is within a preset range, selecting whether part of the refrigerant enters the liquid storage device (3) through the storage liquid passage so as to reduce the total amount of the refrigerant flowing in the pipeline of the air conditioner system.
8. The method according to claim 7, characterized in that the method further comprises the steps of:
the environment temperature comprises an indoor temperature and an outdoor temperature, when the temperature sensing bag detects that the absolute value of the difference between the outdoor temperature and the first set value is smaller than or equal to T1, the temperature sensing bag judges that the low-flow circulation mode is suitable, and when the absolute value of the difference between the outdoor temperature and the first set value is larger than T1, the temperature sensing bag judges that the low-flow circulation mode is the normal-flow circulation mode.
9. The method according to claim 8, characterized in that in the normal flow circulation mode the air conditioner system primary bypass electrovalve (2) is in a closed state and the secondary bypass two-way valve (4) is in an open state.
10. The method according to claim 8, wherein in the small flow circulation mode, the amount of circulation of the refrigerant is determined according to the difference between the indoor temperature and the second set value, if the difference between the indoor temperature and the second set value is smaller, the compressor (6) performs high-frequency operation to increase the amount of the refrigerant in the accumulator (3), if the difference between the indoor temperature and the second set value is larger, the operation frequency of the compressor (6) under the current working condition is increased to the intermediate frequency to perform boost operation, and then the primary bypass electronic valve (2) is controlled to be in an opened state, and the secondary bypass two-way valve (4) is controlled to be in a closed state.
11. Method according to claim 10, characterized in that in the low-flow circulation mode the amount of refrigerant flowing into the accumulator (3) is determined by the discharge temperature of the compressor (6).
12. Method according to claim 10, characterized in that in the low-flow circulation mode, after the discharge temperature of the compressor (6) reaches a preset value, the primary bypass electrovalve (2) and the secondary bypass two-way valve (4) are closed to retain part of the refrigerant in the accumulator (3).
13. Method according to claim 12, characterized in that during continued operation of the compressor (6), the bulb periodically detects an indoor temperature and an outdoor temperature, and by comparing the indoor temperature with a second set value, the outdoor temperature is compared with a first set value, and the selection of the low flow circulation mode or the normal flow circulation mode is determined on the basis of the comparison result.
14. Method according to claim 9, characterized in that the primary bypass electrovalve (2) and the secondary bypass two-way valve (4) are returned to open state by default each time the compressor (6) is shut down.
15. The method according to claim 10, wherein the compressor (6) performs the high-frequency operation when the bulb detects that the absolute value of the difference between the indoor temperature and the second set value is less than or equal to T2, and the compressor (6) performs the step-up operation at the intermediate frequency when the absolute value of the difference between the indoor temperature and the second set value is greater than T2.
16. The method according to any one of claims 7 to 15, characterized in that the compressor (6) is a variable frequency compressor.
17. The method according to any one of claims 7 to 9, 14, characterized in that the compressor (6) is a fixed-frequency compressor.
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| CN111486611A (en) * | 2020-04-24 | 2020-08-04 | 深圳麦克维尔空调有限公司 | Air conditioning system and control method thereof |
| CN111637580B (en) * | 2020-04-28 | 2022-02-01 | 宁波奥克斯电气股份有限公司 | Method for controlling refrigerating capacity of air conditioner and air conditioner |
| CN112944617B (en) * | 2021-01-29 | 2022-09-06 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner and air conditioner |
| CN113531933B (en) * | 2021-07-05 | 2022-07-26 | 珠海格力电器股份有限公司 | Refrigerant circulation quantity adjusting method and device and air conditioning system |
| CN114234516A (en) * | 2021-12-15 | 2022-03-25 | 海信（山东）冰箱有限公司 | Refrigerator and refrigerant flow control method |
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