CN107084483B - Air conditioner and control method - Google Patents
Air conditioner and control method Download PDFInfo
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- CN107084483B CN107084483B CN201710242337.7A CN201710242337A CN107084483B CN 107084483 B CN107084483 B CN 107084483B CN 201710242337 A CN201710242337 A CN 201710242337A CN 107084483 B CN107084483 B CN 107084483B
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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
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner and a control method, and belongs to the technical field of air conditioners. The air conditioner comprises a controller, a temperature sensor, an electric control part arranged on an outdoor unit of the air conditioner, a variable-capacity compressor assembly, a cooling pipe group and a cooling pipe group, wherein the variable-capacity compressor assembly comprises a variable-capacity compressor; the controller is used for: acquiring the outdoor environment temperature; when the outdoor environment temperature is greater than or equal to the preset temperature threshold, the variable-capacity compressor is controlled to operate in a double-cylinder mode, and the flow of the refrigerant flowing through the heat dissipation pipe set is controlled to be increased. The air conditioner adopts the variable-capacity compressor and the radiating pipe group for radiating the electric control element, switches the operation mode of the variable-capacity compressor according to the outdoor temperature condition, and controls the radiating pipe group to radiate the electric control element, so that the refrigerant output by the compressor can meet the requirements of indoor heat exchange and the radiating of the electric control element, and the integral operation energy efficiency of the air conditioner is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method.
Background
The conventional air conditioner mostly adopts a mechanical compressor to perform compression operation of temperature rise and pressure rise on a refrigerant, such as a piston compressor, a screw compressor, a centrifugal compressor, a linear compressor and the like, and can be divided into a single-cylinder compressor, a double-cylinder compressor and a multi-cylinder compressor according to the number of compression cylinder bodies in the compressor, wherein for the double-cylinder compressor and the multi-cylinder compressor with the number of cylinder bodies not less than one, the compression process is that multistage compression operation is sequentially performed on the refrigerant according to the connection sequence among the multiple cylinder bodies. When the air conditioner normally operates, the compressor can only raise and boost the temperature and the pressure of a refrigerant according to a fixed single compression sequence mode, but due to the influence of various factors such as outdoor ambient temperature, indoor temperature and the like, the air conditioner has different requirements on the operating frequency, the compression efficiency and the like of the compressor under different working conditions, so that the conventional compressor often has useless power consumption when operating in a single compression mode and cannot reach the optimal energy efficiency operating state of the air conditioner.
Disclosure of Invention
The invention provides an air conditioner and a control method, and aims to solve the problem of how to improve the operation energy efficiency of the air conditioner. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to the first aspect of the present invention, there is also provided a control method of an air conditioner, the control method including: controlling the air conditioner to perform refrigeration operation; acquiring the outdoor environment temperature; when the outdoor environment temperature is greater than or equal to the preset temperature threshold, the variable-capacity compressor is controlled to operate in a double-cylinder mode, and the flow of the refrigerant flowing through the heat dissipation pipe set is controlled to be increased.
Further, the control method further comprises: and when the outdoor environment temperature is lower than the temperature threshold, controlling the variable-capacity compressor to operate in a two-stage mode, and controlling and reducing the flow of the refrigerant flowing through the heat dissipation pipe set.
Further, the control method further comprises: acquiring indoor environment temperature and target refrigerating temperature set by a user; determining a temperature difference value between the indoor environment temperature and the target refrigerating temperature; and when the temperature difference value is greater than or equal to a preset temperature difference threshold value, controlling and increasing the total flow of the refrigerant circulating pipeline.
According to a second aspect of the present invention, there is also provided an air conditioner, the air conditioner includes a controller, a first temperature sensor for detecting an outdoor environment temperature, an electric control unit disposed in an outdoor unit of the air conditioner, and a variable capacity compressor assembly connected to a refrigerant circulation pipeline of the air conditioner and configured to drive a refrigerant to circulate, the variable capacity compressor assembly includes a variable capacity compressor, and an operation mode of the variable capacity compressor includes a two-stage mode and a two-cylinder mode; the air conditioner also comprises a radiating pipe group which is connected with the refrigerant circulating pipeline and used for radiating the electric control part; the controller is used for: controlling the air conditioner to perform refrigeration operation; acquiring the outdoor environment temperature; when the outdoor environment temperature is greater than or equal to the preset temperature threshold, the variable-capacity compressor is controlled to operate in a double-cylinder mode, and the flow of the refrigerant flowing through the heat dissipation pipe set is controlled to be increased.
Further, the variable capacity compressor assembly comprises a variable capacity compressor and a first four-way valve; the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a second four-way valve and a throttling device; the refrigerant circulating pipeline is formed by connecting a variable-capacity compressor assembly, an indoor heat exchanger, an outdoor heat exchanger, a second four-way valve and a throttling device.
Further, the air conditioner also comprises a gas-liquid separator connected with the refrigerant circulating pipeline, and the gas-liquid separator comprises an inlet, a first outlet and a second outlet; the variable-capacity compressor comprises a first compression cylinder and a second compression cylinder, the first compression cylinder is provided with a first air inlet and a first air outlet, the second compression cylinder is provided with a second air inlet and a second air outlet, the first air inlet is communicated with the first outlet of the gas-liquid separator, and the second air outlet of the second compression cylinder is communicated with the exhaust port of the variable-capacity compressor; the first four-way valve comprises a valve body, a valve block arranged in a valve cavity in the valve body, a first interface, a second interface, a third interface and a fourth interface, wherein the valve block is provided with a first valve position for communicating the first interface with the second interface and communicating the third interface with the fourth interface, and a second valve position for communicating the second interface with the third interface and blocking the first interface and the fourth interface; the first interface is communicated with a second outlet of the gas-liquid separator, the second interface is communicated with a second gas inlet, the third interface is communicated with a first gas outlet, and the fourth interface is communicated with a gas outlet; controlling a variable capacity compressor to operate in a two cylinder mode, comprising: controlling a valve block of the first four-way valve to be switched to a first valve position; controlling a variable capacity compressor to operate in a two-stage mode, comprising: and controlling the valve block of the first four-way valve to be switched to the second valve position.
Further, the second four-way valve comprises a valve body, a valve block arranged in a valve cavity in the valve body, a first interface, a second interface, a third interface and a fourth interface, wherein the valve block is provided with a first valve position communicated with the first interface and the fourth interface and the second interface and the third interface, and a second valve position communicated with the first interface and the second interface and the third interface and the fourth interface; the first interface is communicated with the outdoor heat exchanger, the second interface is communicated with the inlet of the gas-liquid separator, the third interface is communicated with the indoor heat exchanger, and the fourth interface is communicated with the exhaust port; when the air conditioner operates in a refrigerating mode, the valve block of the second four-way valve is located at the first valve position.
Further, the radiating pipe group comprises a flash evaporator, a radiator and a radiating refrigerant pipe, wherein the flash evaporator is connected to a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger; one end of the heat-dissipation refrigerant pipe is connected with the flash evaporator, and the other end of the heat-dissipation refrigerant pipe is connected with the inlet of the gas-liquid separator; the radiator is connected in series on the radiating refrigerant pipe and is arranged adjacent to the electric control part.
Further, the throttling device comprises a first throttling valve, a second throttling valve and a third throttling valve, wherein the first throttling valve is connected to a refrigerant pipeline between the outdoor heat exchanger and the flash evaporator, the second throttling valve is connected to the refrigerant pipeline between the indoor heat exchanger and the flash evaporator, and the third throttling valve is connected to the heat dissipation refrigerant pipe; the control improves the refrigerant flow who flows through the heat dissipation bank of tubes, includes: controlling and improving the flow opening of the third throttle valve; the control reduces the refrigerant flow through the heat dissipation bank of tubes, includes: controlling and reducing the flow opening of the third throttle valve; the control improves the total flow of refrigerant circulation pipeline, includes: the control increases the flow opening of the first throttle valve and the second throttle valve.
Further, the third throttle valve is arranged on the heat dissipation refrigerant pipe between the heat radiator and the gas-liquid separator.
The air conditioner adopts the variable-capacity compressor and the radiating pipe group for radiating the electric control element, switches the operation mode of the variable-capacity compressor according to the outdoor temperature condition, and controls the radiating pipe group to radiate the electric control element, so that the refrigerant output by the compressor can meet the requirements of indoor heat exchange and the radiating of the electric control element, and the integral operation energy efficiency of the air conditioner is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart illustrating a control method of an air conditioner according to the present invention according to an exemplary embodiment;
fig. 2 is a schematic structural view illustrating an air conditioner of the present invention according to an exemplary embodiment.
11, an outdoor heat exchanger;
12. a variable capacity compressor; 121. a first compression cylinder; 122. a second compression cylinder; 123. a first port; 124. a second port; 125. a third port; 126. a fourth port; 127. an exhaust port;
1211. a first air inlet; 1212. a first air outlet;
1221. a second air inlet; 1222. a second air outlet;
because the first four-way valve and the second four-way valve are arranged at a plurality of interfaces, the interfaces with the same name of different four-way valves are distinguished by adopting different reference numerals, and the method comprises the following specific steps:
13. a first four-way valve; 131. a first interface; 132. a second interface; 133. a third interface; 134. a fourth interface;
14. a second four-way valve: 141. a first interface; 142. a second interface; 143. a third interface; 144. a fourth interface;
16. a gas-liquid separator; 161. a first outlet; 162. a second outlet; 163. an inlet;
17. a flash tank; 18. a heat sink;
21. an indoor heat exchanger;
221. a first throttle valve; 222. a second throttle valve; 223. and a third throttle valve.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
As shown in fig. 2, the present invention provides an air conditioner, which includes an indoor unit and an outdoor unit, wherein the outdoor unit is provided with a first temperature sensor for detecting an outdoor environment temperature, so as to detect a current outdoor environment temperature in real time; meanwhile, the outdoor unit is also provided with a variable capacity compressor assembly for driving the refrigerant to circulate, and the variable capacity compressor assembly can compress the refrigerant in the refrigerant circulation pipeline of the air conditioner and provides power for the refrigerant to circularly flow between the indoor unit and the outdoor unit.
The variable capacity compressor assembly includes a variable capacity compressor 12, in an embodiment, the variable capacity compressor 12 includes at least two compression cylinders, and each compression cylinder can independently perform a compression operation on a refrigerant; when the air conditioner operates under different temperature and humidity working conditions, the air conditioner also has corresponding requirements on the refrigerant flowing in the refrigerant circulation pipeline, for example, when the indoor and outdoor temperature is higher in summer, a compressor is required to output more refrigerants in order to accelerate the heating efficiency of the air conditioner; or when the indoor temperature is close to the refrigeration temperature set by the user in summer, the compressor is required to compress the refrigerant at a higher compression ratio in order to improve the energy efficiency of the air conditioner. Therefore, the operation modes of the variable capacity compressor 12 adopted by the invention comprise a two-stage mode and a two-cylinder mode, wherein when the variable capacity compressor 12 operates in the two-stage mode, the refrigerant flowing through the variable capacity compressor 12 is sequentially compressed by each compression cylinder body, and the refrigerant subjected to multi-stage compression is output to the refrigerant circulation pipeline, so that the compression ratio of the refrigerant can be improved, and the two-stage mode is suitable for the conditions of small temperature difference or small humidity difference; when the variable-capacity compressor 12 operates in the double-cylinder mode, the refrigerant flowing through the variable-capacity compressor 12 is independently compressed by each compression cylinder body, the refrigerants compressed by each compression cylinder body are not communicated with each other, and after each compression cylinder body completes compression, the compressed refrigerants are independently output to the refrigerant circulation pipeline.
Generally, an air conditioner includes electrical components such as a computer board, etc. for controlling the operation of components such as a compressor, a fan, a heat exchanger, and an expansion valve of the air conditioner, wherein, in part of air conditioner models, the electric control part is arranged on the outdoor unit of the air conditioner, a large amount of heat is generated in the working process of the electric control part, under the high-temperature weather condition in summer, the outdoor environment temperature of the outdoor unit is high, the heat generated by the electric control part can not be quickly dissipated to the outdoor environment, the problems of excessive heat accumulation of the electric control board, overhigh self temperature, easy spontaneous combustion and the like are caused, so the air conditioner also comprises a heat dissipation pipe set, can be used for reducing the ambient temperature around the electric control so that the electric control can exchange heat with the ambient low-temperature air, or the heat dissipation pipe set can directly exchange heat with the electric control plate, and the purpose of reducing the temperature of the electric control can be achieved.
The radiating pipe set is connected to a refrigerant circulating pipeline of the air conditioner, so that part of refrigerant of the refrigerant circulating pipeline is distributed to the radiating pipe set, and the low-temperature refrigerant in the refrigerant circulating pipeline is utilized to realize radiating and cooling of the electric control part.
Due to the variability of indoor and outdoor environmental factors, the working conditions of the air conditioner during operation are different, for example, in summer weather conditions, the outdoor environment temperature is high, and the heat exchange quantity between the heat exchanger of the outdoor unit and the outdoor environment is directly influenced; or, in the two periods of daytime and night in summer, the outdoor environment temperature changes greatly, so that the compressor of the conventional air conditioner can not meet the refrigerant requirement under the current working condition when running in a single mode. Meanwhile, because the refrigerant compressed by the variable capacity compressor assembly of the air conditioner of the present invention needs to simultaneously supply the heat exchange of the indoor heat exchanger 21 to the indoor environment and the heat dissipation of the heat dissipation pipe group to the electric control, the air conditioner of the present invention adopting the variable capacity compressor 12 is suitable for the refrigerant requirements under different working conditions, in a plurality of embodiments of the present invention, a control method of the air conditioner is further provided, as shown in fig. 1, taking the summer refrigeration working condition as an example, the control method at least comprises the following steps: s110, controlling the air conditioner to perform refrigeration operation; s120, acquiring outdoor environment temperature; s131, when the outdoor environment temperature is larger than or equal to the preset temperature threshold, controlling the variable-capacity compressor to operate in a double-cylinder mode, and controlling and improving the flow of the refrigerant flowing through the heat dissipation pipe set.
The controller of the air conditioner can switch the working mode of the compressor according to different outdoor environment temperatures, can adapt to the heat exchange requirement between the air conditioner and the environment temperature, can reduce the temperature of the electric control by utilizing the heat dissipation pipe set, and ensures the safety of the electric control without influencing the indoor comfort experience.
In the above embodiment, the air conditioner operates in the cooling mode in summer, and the refrigerant circulation line has two flow paths, where the first flow path sequence for the heat exchange of the indoor heat exchanger 21 to the indoor environment is as follows: the variable capacity compressor assembly → the outdoor heat exchanger 11 of the outdoor unit → the indoor heat exchanger 21 of the indoor unit → the variable capacity compressor assembly, wherein the refrigerant absorbs heat from the outdoor environment when flowing through the outdoor heat exchanger 11 of the outdoor unit, and releases heat to the indoor environment when flowing through the indoor heat exchanger 21 of the indoor unit, thereby achieving the purpose of heating and warming the indoor environment.
The second flow path sequence for the heat dissipation of the electric control part by the heat dissipation pipe group is as follows: the refrigerant flows out of the outdoor heat exchanger 11 of the outdoor unit and then is sequentially distributed to the heat dissipation pipe group and the indoor heat exchanger 21 of the indoor unit along the two flow paths, and the refrigerant flowing through the heat dissipation pipe group absorbs heat emitted by the electric control component, so that the purposes of dissipating heat and cooling the electric control component can be achieved.
In the summer refrigeration working condition, the outdoor environment temperature is detected by a first temperature sensor arranged on the outdoor unit in real time, and the first temperature sensor transmits the detected parameters such as the outdoor environment temperature to the controller, so that the controller can conveniently switch and adjust the operation mode of the variable capacity compressor 12; in addition, the number of times of the control process executed by the controller under the refrigeration working condition in summer is one or more, so that when the controller executes the control process for the nth time, the first temperature sensor can transmit the real-time outdoor environment temperature corresponding to the current control process for the N times to the air conditioner, and the controller can conveniently perform adaptive adjustment on the variable capacity compressor 12 mode switched by the control process for the N-1 st time during the control process for the nth time, so that the operation mode of the variable capacity compressor 12 can be adapted to the current working conditions of different time points or time periods during the operation process of the air conditioner in a longer time period.
In step S131, the temperature threshold is a threshold parameter pre-stored in the controller, for example, the temperature threshold stored in the controller may be 32 ℃, 33 ℃, 35 ℃ or the like, that is, the temperature threshold is a temperature parameter with a high temperature in summer that may affect the heat exchange between the outdoor heat exchanger 11 and the outdoor environment, and therefore the temperature threshold is used as a critical condition for determining the operation mode of the variable capacity compressor 12.
Meanwhile, in step S131, when the outdoor ambient temperature is greater than or equal to the temperature threshold, it may be determined that the outdoor high temperature condition may limit the heat exchange amount of the outdoor heat exchanger 11 and affect the normal heat dissipation of the electrical control, so that the refrigerant amount of the outdoor heat exchanger 11 needs to be increased, the heat dissipation operation of the heat dissipation pipe set on the electrical control needs to be started, and the variable capacity compressor 12 needs to operate in a mode of outputting more refrigerants. For example, the temperature threshold set by the air conditioner is 33 ℃, after the air conditioner is started to perform cooling operation, the outdoor environment temperature detected by the first temperature sensor is 36 ℃, the judgment condition that the outdoor environment temperature is greater than or equal to the temperature threshold is met, the controller controls the variable-capacity compressor 12 to operate in a two-cylinder mode, the two compression cylinders perform refrigerant compression operation independently, and the refrigerant quantity which is twice as large as that of a single compression cylinder is output to the refrigerant circulation pipeline, so that the refrigerant quantity flowing through the outdoor heat exchanger 11 is increased, and the heat exchange quantity between the air conditioner and the outdoor environment is improved.
In an embodiment of the present invention, the control flow executed by the controller further includes step S132, when the outdoor ambient temperature is less than the temperature threshold, controlling the variable capacity compressor to operate in a two-stage mode, and controlling to reduce the flow rate of the refrigerant flowing through the heat dissipation tube set. When the outdoor ambient temperature is less than the temperature threshold, it can be determined that the influence of the outdoor ambient temperature on the heat exchange amount of the outdoor heat exchanger 11 is small, and the electric control member can normally dissipate heat to the outdoor environment, so that the variable capacity compressor 12 can operate in a mode of outputting less refrigerant. For example, in the summer refrigeration condition, the temperature threshold value set by the air conditioner is 33 ℃, after the air conditioner is started to perform refrigeration operation, the outdoor environment temperature detected by the first temperature sensor is 30 ℃, the judgment condition that the outdoor environment temperature is less than the temperature threshold value is met, the controller controls the variable-capacity compressor 12 to operate in a two-stage mode, and the two compression cylinder bodies sequentially perform refrigerant compression operation, so that the compression ratio of the air conditioner to the refrigerant can be improved, and the heat exchange efficiency of the air conditioner and the outdoor environment is enhanced.
In steps S131 and S132 of the present invention, the temperature threshold is the same threshold parameter. One or more temperature thresholds are stored in the controller, and when the controller executes the process for multiple times, different temperature thresholds can be selected according to needs.
It should be noted that, the refrigerant flow in the heat dissipation tube set of the air conditioner of the present invention is controlled by a throttle valve, when the opening of the throttle valve is increased, the refrigerant flow flowing through the heat dissipation tube set can be increased, and when the opening of the throttle valve is decreased, the refrigerant flow flowing through the heat dissipation tube set can be decreased. When the air conditioner is started to operate, the throttle valve may be opened or closed at the initial opening during the previous operation, and under the two conditions, the flow of the refrigerant flowing through the heat dissipation tube set is controlled by the controller to be increased or decreased by the following flow: when the throttle valve is opened at the initial opening, the controller of the invention increases or decreases the opening of the throttle valve based on the initial opening, so that the opening of the throttle valve after adjustment can meet the requirement of refrigerant flow regulation; when the throttle valve is in the closed state, the throttle valve is controlled to be opened and the opening degree of the throttle valve is adjusted to a set opening degree value so that the refrigerant can flow into the heat radiation pipe set and the electric control part can be radiated in step S131, and the throttle valve is maintained in the closed state in step S132.
In an embodiment of the present invention, the air conditioner further includes a second temperature sensor disposed in the indoor unit, and the second temperature sensor is configured to detect a real-time indoor temperature of an indoor environment and transmit real-time indoor temperature information obtained through detection to the controller. Optionally, the second temperature sensor is disposed at an air inlet of the indoor unit, so that the detected indoor temperature is close to or the same as the current indoor ambient temperature, thereby improving the determination accuracy of the controller.
In order to improve the cooling effect of the air conditioner on the indoor environment, the control method of the invention also comprises the following steps: s140, acquiring an indoor environment temperature and a target refrigerating temperature set by a user; s150, determining a temperature difference value between the indoor environment temperature and the target refrigerating temperature; and S160, when the temperature difference value is larger than or equal to the preset temperature difference threshold value, controlling and increasing the total flow of the refrigerant circulating pipeline.
In step S140, one of the ways of acquiring the indoor ambient temperature by the controller is to acquire the real-time indoor temperature transmitted by the second temperature sensor; one way for the controller to obtain the target cooling temperature is to use a remote controller or a panel of the indoor unit to input the target cooling temperature.
In step S160, when the temperature difference value is greater than or equal to the preset temperature difference threshold, it may be determined that the temperature difference between the indoor environment temperature and the target refrigeration temperature for setting is relatively large, and in order to improve the refrigeration efficiency of the air conditioner to the indoor environment and shorten the time for the indoor environment temperature to reach the target refrigeration temperature, the controller of the present invention controls and increases the total flow rate of the refrigerant circulation pipeline, so that the refrigerant flow rate input to the indoor heat exchanger 21 may be increased under the condition that the refrigerant flow rate flowing through the heat dissipation pipe set is not changed, thereby improving the refrigeration effect to the indoor environment.
The throttle valve is arranged in the refrigerant circulating pipeline of the air conditioner, so that the flow of the refrigerant flowing through the refrigerant circulating pipeline can be improved when the opening degree of the throttle valve is increased, and the flow of the refrigerant flowing through the refrigerant circulating pipeline can be reduced when the opening degree of the throttle valve is reduced. Thus, in step 160, the total flow rate of the refrigerant circulation line can be increased by increasing the throttle opening.
In order to realize that the controller can control the air conditioner to execute the above process, the invention further explains the components and the structure of the specific parts of the air conditioner:
the air conditioner comprises an indoor heat exchanger 21, an outdoor heat exchanger 11, a second four-way valve 14 and a throttling device, wherein the indoor heat exchanger 21, the outdoor heat exchanger 11, the second four-way valve 14, the throttling device and the variable-capacity compression assembly in the embodiment are connected through a refrigerant pipeline to form a refrigerant circulating pipeline in the air conditioner, so that the circulation flow of the refrigerant between an indoor unit and an outdoor unit is realized.
The indoor heat exchanger 21 is used for exchanging heat with an indoor environment, and comprises a heat absorbing unit for absorbing heat of the indoor environment in a summer cooling working condition and a heat releasing unit for releasing heat to the indoor environment in a winter heating working condition; the outdoor heat exchanger 11 is used for exchanging heat in the outdoor environment, and includes transferring the indoor heat absorbed by the indoor heat exchanger 21 to the outdoor heat exchanger 11 through a refrigerant in the summer cooling condition, and discharging the heat to the outdoor environment through the outdoor heat exchanger 11, and absorbing the heat from the outdoor environment in the winter heating condition, and transferring the heat to the indoor heat exchanger 21 through the refrigerant, and discharging the heat to the indoor environment through the indoor heat exchanger 21.
In an embodiment, the air conditioner further includes a gas-liquid separator 16 connected to the refrigerant circulation pipeline, wherein the gas-liquid separator 16 is configured to separate a gaseous refrigerant flowing back to the variable capacity compressor 12 from a liquid refrigerant, and input the gaseous refrigerant to a suction port of the variable capacity compressor 12; in order to ensure that the two compression cylinders can independently suck the refrigerant in the dual-cylinder mode of operation, the gas-liquid separator 16 of the present invention includes an inlet 163, a first outlet 161, and a second outlet 162 to respectively supply the refrigerant to the two compression cylinders of the variable displacement compressor 12.
Alternatively, the gas-liquid separator 16 may be provided with only one refrigerant outlet, and the refrigerant outlet and the two compression cylinders of the variable capacity compressor 12 may be connected by a branch refrigerant pipeline, so that the refrigerant flowing out of the refrigerant outlet may flow into the corresponding compression cylinders along the branch refrigerant pipeline, respectively.
In the embodiment of the present invention, the variable displacement compressor assembly mainly includes a variable displacement compressor 12 and a first four-way valve 13, and the present invention realizes the switching of two operation modes of the variable displacement compressor 12 by switching between different valve positions of the first four-way valve 13.
In the specific embodiment, the variable displacement compressor 12 includes a first compression cylinder 121 and a second compression cylinder 122, both of which can independently perform compression operation on refrigerant, and in the illustration, as for a single unit of the variable displacement compressor 12, cylinder bodies of the two compression cylinders are not communicated with each other, in the present invention, the two compression cylinder bodies are communicated by the first four-way valve 13, and when the first four-way valve 13 is at different valve positions, the two compression cylinders respectively form a two-stage mode refrigerant flow path and a two-cylinder mode refrigerant flow path.
In an embodiment, the variable capacity compressor 12 has 5 ports, including a first port 123, a second port 124, a third port 125, a fourth port 126 and an exhaust port 127, disposed on the machine body, for communicating with an external refrigerant pipeline, where the fourth port 126 is communicated with the exhaust port 127 inside the machine body of the variable capacity compressor 12, and the exhaust port 127 is communicated with an exhaust pipeline of the compressor, so that a compressed refrigerant can be input into a refrigerant circulation pipeline of the air conditioner along the exhaust pipeline; the first compression cylinder 121 has a first inlet 1211 and a first outlet 1212, and the second compression cylinder 122 has a second inlet 1221 and a second outlet 1222, wherein the first inlet 1211 communicates with the first outlet 161 of the gas-liquid separator 16, and the second outlet 1222 of the second compression cylinder 122 communicates with the outlet 127 of the variable displacement compressor 12;
the first four-way valve 13 includes a valve body, a valve block disposed in a valve cavity in the valve body, and a first port 131, a second port 132, a third port 133, and a fourth port 134, the valve block having a first valve position for communicating the first port 131 with the second port 132 and communicating the third port 133 with the fourth port 134, and a second valve position for communicating the second port 132 with the third port 133 and blocking the first port 131 from the fourth port 134; the first port 131 is communicated with the second outlet 162 of the gas-liquid separator 16, the second port 132 is communicated with the second inlet 1221, the third port 133 is communicated with the first outlet 1212, and the fourth port 134 is communicated with the exhaust 127.
When the first four-way valve 13 is in the first valve position, the variable capacity compressor 12 operates in a two-cylinder mode, and the flow path of the refrigerant in the variable capacity compressor assembly includes two paths: (1) a refrigerant to be compressed flows in along the first port 123 of the variable displacement compressor 12, and sequentially flows through the first port 123 of the variable displacement compressor 12 → the first inlet 1211 → the first compression cylinder 121 → the first outlet 1212 → the second port 124 of the variable displacement compressor 12 → the third port 133 of the first four-way valve 13 → the valve chamber-the fourth port 134 of the first four-way valve 13 → the fourth port 126 of the variable displacement compressor 12 → the discharge port 127 of the variable displacement compressor 12, and in a refrigerant flow path, the refrigerant is compressed once by the first compression cylinder 121 and is finally output to a refrigerant circulation flow path of the air conditioner through the discharge port 127127; (2) the refrigerant to be compressed flows in along the first port of the first four-way valve 13, and sequentially flows through the first port 131 of the first four-way valve 13 → the valve chamber → the second port 132 of the first four-way valve 13 → the third port 125 of the variable displacement compressor 12 → the second inlet 1221 → the second compression cylinder 122 → the second outlet 1222 → the discharge port 127 of the variable displacement compressor 12, and in the refrigerant flow path, the refrigerant is primarily compressed by the second compression cylinder 122 and is finally discharged into the refrigerant circulation flow path of the air conditioner through the discharge port 127. In the two refrigerant flow paths, the two compression cylinders of the variable capacity compressor 12 can respectively and independently perform operations of air suction, compression, air exhaust and the like, so that the compression amount of the refrigerant can be effectively increased, and the refrigerant output quantity of the compressor is increased, so as to meet the refrigerant quantity requirement when a plurality of heat exchange units of the indoor unit perform operations such as refrigeration, heating or dehumidification.
When the first four-way valve 13 is in the second valve position, the variable capacity compressor 12 operates in a two-stage mode, and a flow path of the refrigerant in the variable capacity compressor 12 is one: the refrigerant to be compressed flows in along the first port 123 of the variable displacement compressor 12, and sequentially flows through the first port 123 of the variable displacement compressor 12 → the first inlet 1211 → the first compression cylinder 121 → the first outlet 1212 → the second port 124 of the variable displacement compressor 12 → the third port 133 of the first four-way valve 13 → the valve chamber → the second port 132 of the first four-way valve 13 → the third port 125 of the variable displacement compressor 12 → the second inlet 1221 → the second compression cylinder 122 → the second outlet 1222 of the second compression cylinder 122 → the discharge port 127 of the variable displacement compressor 12, and in this refrigerant flow path, the refrigerant is primarily compressed by the first compression cylinder 121, secondarily compressed by the second compression cylinder 122, and finally output to the refrigerant circulation flow path of the air conditioner via the discharge port 127. In the refrigerant flow path, the two compression cylinders of the variable capacity compressor 12 sequentially perform operations of air suction, compression, air discharge and the like, so that secondary compression of the refrigerant is realized, the compression ratio of the refrigerant can be effectively improved, and the heat exchange efficiency of the indoor heat exchanger 21 and the outdoor heat exchanger 11 is enhanced.
Therefore, the controller controls the variable displacement compressor 12 to operate in a two-cylinder mode, specifically, controls the valve block of the first four-way valve 13 to switch to the first valve position; when the variable displacement compressor 12 is controlled to operate in the two-stage mode, the valve block of the first four-way valve 13 is specifically controlled to switch to the second valve position.
In an embodiment of the present invention, the second four-way valve 14 is mainly used for controlling a flow direction of a refrigerant during a refrigeration cycle and a heating cycle, the second four-way valve 14 includes a valve body, a valve block disposed in a valve cavity in the valve body, and a first port 141, a second port 142, a third port 143, and a fourth port 144, the valve block has a first valve position communicating the first port 141 and the fourth port 144, communicating the second port 142 and the third port 143, and a second valve position communicating the first port 141 and the second port 142, communicating the third port 143 with the fourth port 144; the first port 141 is communicated with the outdoor heat exchanger 11, the second port 142 is communicated with the inlet 163 of the gas-liquid separator 16, the third port 143 is communicated with the indoor heat exchanger 21, and the fourth port 144 is communicated with the exhaust port 127. When the air conditioner operates in a refrigerating mode, a valve block of the second four-way valve 14 is in a first valve position; during heating operation of the air conditioner, the valve block of the second four-way valve 14 is in the second valve position.
In the embodiment of the present invention, the heat dissipation pipe set mainly includes the flash evaporator 17, the heat sink 18, and the heat dissipation refrigerant pipe, and the flash evaporator 17 and the heat sink 18 are connected in sequence through the heat dissipation refrigerant pipe to form the heat dissipation refrigerant flow path.
The flash evaporator 17 is used for evaporating the liquid refrigerant into a gaseous refrigerant and inputting the gaseous refrigerant into the heat dissipation refrigerant pipeline. The flash tank 17 comprises a liquid cavity and a gas cavity which are communicated with each other, wherein the liquid cavity of the flash tank 17 is connected in series with a refrigerant pipeline between the outdoor heat exchanger 11 and the indoor heat exchanger 21, a part of liquid refrigerant flowing into the flash tank 17 along the refrigerant pipeline is evaporated into gaseous refrigerant, and the gaseous refrigerant flows into the heat dissipation refrigerant flow path through the gas cavity.
The radiator 18 is connected in series on the radiating refrigerant pipe and is arranged close to the electric control part, and when the gaseous refrigerant flows through the radiator 18, the gaseous refrigerant can absorb the heat in the air around the radiator 18, thereby reducing the temperature of the air around the electric control part and facilitating the heat dissipation of the electric control part. Optionally, in order to improve the heat dissipation effect of the heat sink 18, in an embodiment of the present invention, the heat sink 18 is a parallel flow heat exchanger, so as to improve the heat dissipation area and the heat exchange efficiency of the heat sink 18.
One end of the heat-dissipating refrigerant pipe is connected to the air chamber of the flash evaporator 17, and the other end is connected to the inlet 163 of the gas-liquid separator 16, the gaseous refrigerant flows through the air chamber of the flash evaporator 17 and the radiator 18 along the heat-dissipating refrigerant pipe in sequence, and the refrigerant after absorbing heat flows back to the gas-liquid separator 16 to return to the variable capacity compressor 12 again for compression operation.
In order to realize the adjustment of the refrigerant flow of the first flow path and the second flow path in the foregoing embodiments to respectively meet the requirements of indoor heat exchange and heat dissipation of the electric control unit, the air conditioner of the present invention is further provided with a plurality of throttling devices, each of which mainly comprises a first throttling valve 221, a second throttling valve 222 and a third throttling valve 223, wherein the first throttling valve 221 is connected to the refrigerant pipe between the outdoor heat exchanger 11 and the flash evaporator 17, and is configured to adjust the total flow of the refrigerant flowing along the first flow path and the second flow path; the second throttle valve 222 is connected to the refrigerant pipeline between the indoor heat exchanger 21 and the flash tank 17, and is used for adjusting the flow rate of the refrigerant flowing into the indoor heat exchanger 21 along the first flow path; the third throttle valve 223 is connected to the heat dissipation refrigerant pipe for adjusting the flow rate of the refrigerant flowing into the heat dissipation pipe set along the second flow path.
Thus, in the embodiment of the present invention, the specific process of the controller controlling and increasing the refrigerant flow rate flowing through the heat dissipation tube set includes: the flow opening of the third throttle 223 is controlled to be increased, so that the flow of the refrigerant flowing into the heat dissipation tube set along the second pipeline is increased.
The controller control reduces the refrigerant flow who flows through the heat dissipation bank of tubes, includes: the flow opening of the third throttle 223 is controlled to be reduced, so that the flow of the refrigerant flowing into the heat dissipation tube set along the second pipeline is reduced.
The controller controls and improves the total flow of refrigerant circulation pipeline, includes: the flow rate opening degree of the first throttle valve 221 and the second throttle valve 222 is controlled to be increased, so that the flow rate of the refrigerant flowing into the indoor heat exchanger 21 along the second pipeline can be increased, and the heat exchange efficiency to the indoor environment can be improved.
Preferably, the third throttle valve 223 is disposed on the heat dissipation refrigerant pipe between the heat sink 18 and the gas-liquid separator 16, and can throttle the refrigerant passing through the heat sink 18, so as to convert a part of the remaining liquid refrigerant in the heat dissipation refrigerant pipe into a gaseous refrigerant, so that most of the refrigerant can flow back to the gas-liquid separator 16 in a gaseous form, thereby reducing the amount of the liquid refrigerant separated by the gas-liquid separator 16, and increasing the refrigerant suction capacity of the variable capacity compressor 12.
Meanwhile, in order to implement the related step flows of the control method disclosed in the foregoing embodiments, the controller of the air conditioner of the present invention is configured to: controlling the air conditioner to perform refrigeration operation; acquiring the outdoor environment temperature; when the outdoor environment temperature is greater than or equal to the preset temperature threshold, the variable-capacity compressor is controlled to operate in a double-cylinder mode, and the flow of the refrigerant flowing through the heat dissipation pipe set is controlled to be increased.
In an embodiment, the controller is to: and when the outdoor environment temperature is lower than the temperature threshold, controlling the variable-capacity compressor to operate in a two-stage mode, and controlling and reducing the flow of the refrigerant flowing through the heat dissipation pipe set.
In an embodiment, the controller is to: acquiring indoor environment temperature and target refrigerating temperature set by a user; determining a temperature difference value between the indoor environment temperature and the target refrigerating temperature; and when the temperature difference value is greater than or equal to a preset temperature difference threshold value, controlling and increasing the total flow of the refrigerant circulating pipeline.
In order to improve the control accuracy of the throttle valves of the respective flow paths, in an embodiment of the present invention, a flow of calculating the opening of three throttle valves is specifically disclosed, and the flow is as follows:
the air conditioner also comprises a third temperature sensor for detecting the temperature of the radiator 18, and the temperature of the radiator 18 detected by the third temperature sensor is set to be Tp; when the outdoor ambient temperature detected by the first temperature sensor is Tao, the indoor ambient temperature detected by the second temperature sensor is Tn, and the target cooling temperature acquired by the controller is Tm, the target cooling temperature is set to Tao
A first temperature difference value between the indoor ambient temperature and the target cooling temperature is Δ T1 ═ Tn-Tm;
a second temperature difference value between the outdoor ambient temperature and the temperature of the radiator 18 is Δ T2 ═ Tao-Tp;
in the calculation process of the invention, in the heating working condition in summer, the refrigerant flow distributed by the radiator 18 and the indoor heat exchanger 21 is in a direct proportion relation with the corresponding temperature difference value, namely the higher the temperature difference value is, the more heat exchange quantity is needed in the refrigerating working condition in summer, and the more flow is distributed; the lower the temperature difference value is, the less the heat exchange amount required in the refrigeration working condition in summer is, and the less the distributed flow is;
in addition, the refrigerant quantity flowing through the first throttle 221 is set to be M1, the refrigerant quantity flowing through the second throttle 222 is set to be M2, and the refrigerant quantity flowing through the third throttle 223 is set to be M3, which can be obtained from the above-mentioned embodiments, the refrigerant quantity flowing through the first throttle 221 should be the sum of the refrigerant quantities flowing through the second throttle 222 and the third throttle 223, i.e., M1 is M2+ M3, wherein the refrigerant quantity M1 flowing through the first throttle 221 can be directly detected.
Specifically, the amount of the refrigerant flowing through the second throttle valve 222 is calculated according to the following formula:
M2＝M1*△T1/(△T1+△T2)；
the amount of refrigerant flowing through the third throttle valve 223 is calculated according to the following formula:
M3＝M1*△T2/(△T1+△T2)。
in the embodiment, the first throttle valve 221, the second throttle valve 222, and the third throttle valve 223 are of the same type, so that the flow rates of the three throttle valves are the same, and according to the refrigerant flow rate M1 and the opening k of the first throttle valve 221, the flow rate of the first throttle valve 221 per step may be determined to be M1/k, and the flow rate per step is also the numerical value of the flow rate of the second throttle valve 222 and the flow rate per step of the third throttle valve 223, so that the opening degrees of the second throttle valve 222 and the third throttle valve 223 may be determined respectively according to the calculated refrigerant amounts flowing through the second throttle valve 222 and the third throttle valve 223 in the above flow.
Specifically, the flow opening of the second throttle valve 222 is calculated according to the following formula:
k1＝M2/m＝M2/(M1/k)；
the flow opening of the third throttle valve 223 is calculated according to the following formula:
K2＝M3/m＝M3/(M1/k)；
therefore, the controller can calculate and determine the opening of the three throttle valves according to different indoor and outdoor temperature difference conditions, and adaptively adjust the three throttle valves according to the determined opening.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. The control method of the air conditioner is characterized in that the air conditioner comprises a controller, a first temperature sensor for detecting the temperature of outdoor environment, an electric control part arranged on an outdoor unit of the air conditioner, a refrigerant circulating pipeline and a variable-capacity compressor assembly for driving the refrigerant to circulate, wherein the variable-capacity compressor assembly comprises a variable-capacity compressor (12), and the operation modes of the variable-capacity compressor (12) comprise a two-stage mode and a two-cylinder mode; the air conditioner also comprises a radiating pipe group which is connected with the refrigerant circulating pipeline and used for radiating the electric control part;
the air conditioner comprises an indoor heat exchanger (21), an outdoor heat exchanger (11), a throttling device and a gas-liquid separator (16) connected with the refrigerant circulating pipeline;
the air conditioner also comprises a second four-way valve (14), and the refrigerant circulating pipeline is formed by connecting the variable-capacity compressor assembly, the indoor heat exchanger (21), the outdoor heat exchanger (11), the second four-way valve (14) and the throttling device;
the heat dissipation pipe set comprises a flash evaporator (17), a radiator (18) and a heat dissipation refrigerant pipe, wherein the flash evaporator (17) is connected to a refrigerant pipeline between the outdoor heat exchanger (11) and the indoor heat exchanger (21); one end of the heat-dissipation refrigerant pipe is connected to the flash evaporator (17), and the other end of the heat-dissipation refrigerant pipe is connected to an inlet (163) of the gas-liquid separator (16); the radiator (18) is connected in series on the heat-radiating refrigerant pipe and is arranged adjacent to the electric control part;
the throttling device comprises a first throttling valve (221), a second throttling valve (222) and a third throttling valve (223), wherein the first throttling valve (221), the second throttling valve (222) and the third throttling valve (223) are the same type of throttling valve and the flow rate in each step is the same; the first throttling valve (221) is connected to a refrigerant pipeline between the outdoor heat exchanger (11) and the flash evaporator (17), the second throttling valve (222) is connected to a refrigerant pipeline between the indoor heat exchanger (21) and the flash evaporator (17), and the third throttling valve (223) is connected to the heat-dissipation refrigerant pipe;
the control method comprises the following steps:
controlling the air conditioner to perform refrigeration operation;
acquiring the outdoor environment temperature;
when the outdoor environment temperature is greater than or equal to a preset temperature threshold value, controlling the variable-capacity compressor to operate in a double-cylinder mode, and controlling and improving the flow of a refrigerant flowing through the heat dissipation pipe set; when the outdoor environment temperature is lower than the temperature threshold, controlling the variable-capacity compressor to operate in a two-stage mode, and controlling and reducing the flow of the refrigerant flowing through the heat dissipation pipe set;
the control and improvement of the flow of the refrigerant flowing through the heat dissipation pipe set comprise the following steps: controlling and improving the flow opening of the third throttle valve;
the flow opening degree of the third throttle valve is calculated according to the following formula:
K2=M3/m=M3/（M1/k）；
wherein, K2 is the flow opening of the third throttle valve, M3 is the refrigerant volume flowing through the third throttle valve, M is the flow per step of the first throttle valve, M1 is the refrigerant volume flowing through the first throttle valve, and K is the opening of the first throttle valve;
the refrigerant quantity M3 flowing through the third throttle valve is calculated according to the following formula:
M3=M1*△T2/（△T1+△T2），
where Δ T1 is a first temperature difference between an indoor ambient temperature and a target cooling temperature, and Δ T2 is a second temperature difference between an outdoor ambient temperature and a radiator temperature.
2. The control method according to claim 1, characterized by further comprising:
acquiring indoor environment temperature and target refrigerating temperature set by a user;
determining a first temperature difference value between the indoor ambient temperature and the target cooling temperature;
and when the first temperature difference value is greater than or equal to a preset temperature difference threshold value, controlling and increasing the total flow of the refrigerant circulating pipeline.
3. An air conditioner is characterized by comprising a controller, a first temperature sensor for detecting the temperature of outdoor environment, an electric control part arranged on an outdoor unit of the air conditioner, a refrigerant circulation pipeline and a variable-capacity compressor assembly for driving the refrigerant to circulate, wherein the variable-capacity compressor assembly comprises a variable-capacity compressor (12), and the operation modes of the variable-capacity compressor (12) comprise a two-stage mode and a two-cylinder mode; the air conditioner also comprises a radiating pipe group which is connected with the refrigerant circulating pipeline and used for radiating the electric control part;
the air conditioner comprises an indoor heat exchanger (21), an outdoor heat exchanger (11), a throttling device and a gas-liquid separator (16) connected with the refrigerant circulating pipeline;
the air conditioner also comprises a second four-way valve (14), and the refrigerant circulating pipeline is formed by connecting the variable-capacity compressor assembly, the indoor heat exchanger (21), the outdoor heat exchanger (11), the second four-way valve (14) and the throttling device;
the heat dissipation pipe set comprises a flash evaporator (17), a radiator (18) and a heat dissipation refrigerant pipe, wherein the flash evaporator (17) is connected to a refrigerant pipeline between the outdoor heat exchanger (11) and the indoor heat exchanger (21); one end of the heat-dissipation refrigerant pipe is connected to the flash evaporator (17), and the other end of the heat-dissipation refrigerant pipe is connected to an inlet (163) of the gas-liquid separator (16); the radiator (18) is connected in series on the heat-radiating refrigerant pipe and is arranged adjacent to the electric control part;
the throttling device comprises a first throttling valve (221), a second throttling valve (222) and a third throttling valve (223), wherein the first throttling valve (221), the second throttling valve (222) and the third throttling valve (223) are the same type of throttling valve and the flow rate in each step is the same; the first throttling valve (221) is connected to a refrigerant pipeline between the outdoor heat exchanger (11) and the flash evaporator (17), the second throttling valve (222) is connected to a refrigerant pipeline between the indoor heat exchanger (21) and the flash evaporator (17), and the third throttling valve (223) is connected to the heat-dissipation refrigerant pipe;
the controller is configured to:
controlling the air conditioner to perform refrigeration operation;
acquiring the outdoor environment temperature;
when the outdoor environment temperature is greater than or equal to a preset temperature threshold value, controlling the variable-capacity compressor to operate in a double-cylinder mode, and controlling and improving the flow of a refrigerant flowing through the heat dissipation pipe set; when the outdoor environment temperature is lower than the temperature threshold, controlling the variable-capacity compressor to operate in a two-stage mode, and controlling and reducing the flow of the refrigerant flowing through the heat dissipation pipe set;
the control and improvement of the flow of the refrigerant flowing through the heat dissipation pipe set comprise the following steps: controlling and improving the flow opening of the third throttle valve;
the flow opening degree of the third throttle valve is calculated according to the following formula:
K2=M3/m=M3/（M1/k）；
wherein, K2 is the flow opening of the third throttle valve, M3 is the refrigerant volume flowing through the third throttle valve, M is the flow per step of the first throttle valve, M1 is the refrigerant volume flowing through the first throttle valve, and K is the opening of the first throttle valve;
the refrigerant quantity M3 flowing through the third throttle valve is calculated according to the following formula:
M3=M1*△T2/（△T1+△T2），
where Δ T1 is a first temperature difference between an indoor ambient temperature and a target cooling temperature, and Δ T2 is a second temperature difference between an outdoor ambient temperature and a radiator temperature.
4. The air conditioner according to claim 3,
the variable capacity compressor assembly includes the variable capacity compressor (12) and a first four-way valve (13).
5. The air conditioner according to claim 4,
the gas-liquid separator (16) comprising an inlet (163), a first outlet (161) and a second outlet (162);
the variable capacity compressor (12) comprising a first compression cylinder (121) and a second compression cylinder (122), the first compression cylinder (121) having a first gas inlet (1211) and a first gas outlet (1212), the second compression cylinder (122) having a second gas inlet (1221) and a second gas outlet (1222), wherein the first gas inlet (1211) communicates with the first outlet (161) of the gas-liquid separator (16), and the second gas outlet (1222) of the second compression cylinder (122) communicates with a gas outlet (127) of the variable capacity compressor (12);
the first four-way valve (13) comprises a valve body, a valve block arranged in a valve cavity in the valve body, a first interface (131), a second interface (132), a third interface (133) and a fourth interface (134), wherein the valve block is provided with a first valve position for communicating the first interface (131) with the second interface (132) and communicating the third interface (133) with the fourth interface (134), a second valve position for communicating the second interface (132) with the third interface (133) and blocking the first interface (131) from the fourth interface (134); wherein the first port (131) is in communication with the second outlet (162) of the gas-liquid separator (16), the second port (132) is in communication with the second gas inlet (1221), the third port (133) is in communication with the first gas outlet (1212), and the fourth port (134) is in communication with the gas outlet (127);
the controlling the variable capacity compressor to operate in a two-cylinder mode includes: controlling a valve block of the first four-way valve (13) to switch to the first valve position;
the controlling the variable capacity compressor to operate in a two-stage mode includes: and a valve block for controlling the first four-way valve (13) is switched to the second valve position.
6. The air conditioner according to claim 5,
the second four-way valve (14) comprises a valve body, a valve block arranged in a valve cavity in the valve body, a first interface (141), a second interface (142), a third interface (143) and a fourth interface (144), wherein the valve block is provided with a first valve position communicated with the first interface (141) and the fourth interface (144) and the second interface (142) and the third interface (143), and a second valve position communicated with the first interface (141) and the second interface (142) and the third interface (143) and the fourth interface (144); wherein the first port (141) communicates with the outdoor heat exchanger (11), the second port (142) communicates with the inlet (163) of the gas-liquid separator (16), the third port (143) communicates with the indoor heat exchanger (21), and the fourth port (144) communicates with the discharge port (127);
when the air conditioner operates in a refrigerating mode, the valve block of the second four-way valve (14) is in a first valve position.
7. The air conditioner according to claim 5,
the control and improvement of the flow rate of the refrigerant flowing through the heat dissipation tube set comprise: controlling and increasing the flow opening of the third throttle valve (223);
the controlling and reducing the flow of the refrigerant flowing through the heat dissipation tube set comprises the following steps: controlling to reduce the flow opening of the third throttle valve (223);
the controlling and improving the total flow of the refrigerant circulating pipeline comprises the following steps: controlling to increase the flow opening of the first throttle valve (221) and the second throttle valve (222).
8. The air conditioner according to claim 7,
the third throttle valve (223) is disposed on the heat-dissipating refrigerant pipe between the radiator (18) and the gas-liquid separator (16).
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2017
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Effective date of registration: 20210930 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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